three.js/test/unit/three.source.unit.js

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(factory());
}(this, (function () { 'use strict';

	QUnit.module( "Source", () => {

	var REVISION = '88dev';
	var MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2 };
	var CullFaceNone = 0;
	var CullFaceBack = 1;
	var CullFaceFront = 2;
	var CullFaceFrontBack = 3;
	var FrontFaceDirectionCW = 0;
	var FrontFaceDirectionCCW = 1;
	var BasicShadowMap = 0;
	var PCFShadowMap = 1;
	var PCFSoftShadowMap = 2;
	var FrontSide = 0;
	var BackSide = 1;
	var DoubleSide = 2;
	var FlatShading = 1;
	var SmoothShading = 2;
	var NoColors = 0;
	var FaceColors = 1;
	var VertexColors = 2;
	var NoBlending = 0;
	var NormalBlending = 1;
	var AdditiveBlending = 2;
	var SubtractiveBlending = 3;
	var MultiplyBlending = 4;
	var CustomBlending = 5;
	var AddEquation = 100;
	var SubtractEquation = 101;
	var ReverseSubtractEquation = 102;
	var MinEquation = 103;
	var MaxEquation = 104;
	var ZeroFactor = 200;
	var OneFactor = 201;
	var SrcColorFactor = 202;
	var OneMinusSrcColorFactor = 203;
	var SrcAlphaFactor = 204;
	var OneMinusSrcAlphaFactor = 205;
	var DstAlphaFactor = 206;
	var OneMinusDstAlphaFactor = 207;
	var DstColorFactor = 208;
	var OneMinusDstColorFactor = 209;
	var SrcAlphaSaturateFactor = 210;
	var NeverDepth = 0;
	var AlwaysDepth = 1;
	var LessDepth = 2;
	var LessEqualDepth = 3;
	var EqualDepth = 4;
	var GreaterEqualDepth = 5;
	var GreaterDepth = 6;
	var NotEqualDepth = 7;
	var MultiplyOperation = 0;
	var MixOperation = 1;
	var AddOperation = 2;
	var NoToneMapping = 0;
	var LinearToneMapping = 1;
	var ReinhardToneMapping = 2;
	var Uncharted2ToneMapping = 3;
	var CineonToneMapping = 4;
	var UVMapping = 300;
	var CubeReflectionMapping = 301;
	var CubeRefractionMapping = 302;
	var EquirectangularReflectionMapping = 303;
	var EquirectangularRefractionMapping = 304;
	var SphericalReflectionMapping = 305;
	var CubeUVReflectionMapping = 306;
	var CubeUVRefractionMapping = 307;
	var RepeatWrapping = 1000;
	var ClampToEdgeWrapping = 1001;
	var MirroredRepeatWrapping = 1002;
	var NearestFilter = 1003;
	var NearestMipMapNearestFilter = 1004;
	var NearestMipMapLinearFilter = 1005;
	var LinearFilter = 1006;
	var LinearMipMapNearestFilter = 1007;
	var LinearMipMapLinearFilter = 1008;
	var UnsignedByteType = 1009;
	var ByteType = 1010;
	var ShortType = 1011;
	var UnsignedShortType = 1012;
	var IntType = 1013;
	var UnsignedIntType = 1014;
	var FloatType = 1015;
	var HalfFloatType = 1016;
	var UnsignedShort4444Type = 1017;
	var UnsignedShort5551Type = 1018;
	var UnsignedShort565Type = 1019;
	var UnsignedInt248Type = 1020;
	var AlphaFormat = 1021;
	var RGBFormat = 1022;
	var RGBAFormat = 1023;
	var LuminanceFormat = 1024;
	var LuminanceAlphaFormat = 1025;
	var RGBEFormat = RGBAFormat;
	var DepthFormat = 1026;
	var DepthStencilFormat = 1027;
	var RGB_S3TC_DXT1_Format = 2001;
	var RGBA_S3TC_DXT1_Format = 2002;
	var RGBA_S3TC_DXT3_Format = 2003;
	var RGBA_S3TC_DXT5_Format = 2004;
	var RGB_PVRTC_4BPPV1_Format = 2100;
	var RGB_PVRTC_2BPPV1_Format = 2101;
	var RGBA_PVRTC_4BPPV1_Format = 2102;
	var RGBA_PVRTC_2BPPV1_Format = 2103;
	var RGB_ETC1_Format = 2151;
	var LoopOnce = 2200;
	var LoopRepeat = 2201;
	var LoopPingPong = 2202;
	var InterpolateDiscrete = 2300;
	var InterpolateLinear = 2301;
	var InterpolateSmooth = 2302;
	var ZeroCurvatureEnding = 2400;
	var ZeroSlopeEnding = 2401;
	var WrapAroundEnding = 2402;
	var TrianglesDrawMode = 0;
	var TriangleStripDrawMode = 1;
	var TriangleFanDrawMode = 2;
	var LinearEncoding = 3000;
	var sRGBEncoding = 3001;
	var GammaEncoding = 3007;
	var RGBEEncoding = 3002;
	var LogLuvEncoding = 3003;
	var RGBM7Encoding = 3004;
	var RGBM16Encoding = 3005;
	var RGBDEncoding = 3006;
	var BasicDepthPacking = 3200;
	var RGBADepthPacking = 3201;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Constants', () => {

		QUnit.test( "default values", ( assert ) => {

			assert.propEqual( MOUSE, { LEFT: 0, MIDDLE: 1, RIGHT: 2 }, 'MOUSE equal { LEFT: 0, MIDDLE: 1, RIGHT: 2 }' );
			assert.equal( CullFaceNone, 0, 'CullFaceNone equal 0' );
			assert.equal( CullFaceBack, 1, 'CullFaceBack equal 1' );
			assert.equal( CullFaceFront, 2, 'CullFaceFront is equal to 2' );
			assert.equal( CullFaceFrontBack, 3, 'CullFaceFrontBack is equal to 3' );
			assert.equal( FrontFaceDirectionCW, 0, 'FrontFaceDirectionCW is equal to 0' );
			assert.equal( FrontFaceDirectionCCW, 1, 'FrontFaceDirectionCCW is equal to 1' );
			assert.equal( BasicShadowMap, 0, 'BasicShadowMap is equal to 0' );
			assert.equal( PCFShadowMap, 1, 'PCFShadowMap is equal to 1' );
			assert.equal( PCFSoftShadowMap, 2, 'PCFSoftShadowMap is equal to 2' );
			assert.equal( FrontSide, 0, 'FrontSide is equal to 0' );
			assert.equal( BackSide, 1, 'BackSide is equal to 1' );
			assert.equal( DoubleSide, 2, 'DoubleSide is equal to 2' );
			assert.equal( FlatShading, 1, 'FlatShading is equal to 1' );
			assert.equal( SmoothShading, 2, 'SmoothShading is equal to 2' );
			assert.equal( NoColors, 0, 'NoColors is equal to 0' );
			assert.equal( FaceColors, 1, 'FaceColors is equal to 1' );
			assert.equal( VertexColors, 2, 'VertexColors is equal to 2' );
			assert.equal( NoBlending, 0, 'NoBlending is equal to 0' );
			assert.equal( NormalBlending, 1, 'NormalBlending is equal to 1' );
			assert.equal( AdditiveBlending, 2, 'AdditiveBlending is equal to 2' );
			assert.equal( SubtractiveBlending, 3, 'SubtractiveBlending is equal to 3' );
			assert.equal( MultiplyBlending, 4, 'MultiplyBlending is equal to 4' );
			assert.equal( CustomBlending, 5, 'CustomBlending is equal to 5' );
			assert.equal( AddEquation, 100, 'AddEquation is equal to 100' );
			assert.equal( SubtractEquation, 101, 'SubtractEquation is equal to 101' );
			assert.equal( ReverseSubtractEquation, 102, 'ReverseSubtractEquation is equal to 102' );
			assert.equal( MinEquation, 103, 'MinEquation is equal to 103' );
			assert.equal( MaxEquation, 104, 'MaxEquation is equal to 104' );
			assert.equal( ZeroFactor, 200, 'ZeroFactor is equal to 200' );
			assert.equal( OneFactor, 201, 'OneFactor is equal to 201' );
			assert.equal( SrcColorFactor, 202, 'SrcColorFactor is equal to 202' );
			assert.equal( OneMinusSrcColorFactor, 203, 'OneMinusSrcColorFactor is equal to 203' );
			assert.equal( SrcAlphaFactor, 204, 'SrcAlphaFactor is equal to 204' );
			assert.equal( OneMinusSrcAlphaFactor, 205, 'OneMinusSrcAlphaFactor is equal to 205' );
			assert.equal( DstAlphaFactor, 206, 'DstAlphaFactor is equal to 206' );
			assert.equal( OneMinusDstAlphaFactor, 207, 'OneMinusDstAlphaFactor is equal to 207' );
			assert.equal( DstColorFactor, 208, 'DstColorFactor is equal to 208' );
			assert.equal( OneMinusDstColorFactor, 209, 'OneMinusDstColorFactor is equal to 209' );
			assert.equal( SrcAlphaSaturateFactor, 210, 'SrcAlphaSaturateFactor is equal to 210' );
			assert.equal( NeverDepth, 0, 'NeverDepth is equal to 0' );
			assert.equal( AlwaysDepth, 1, 'AlwaysDepth is equal to 1' );
			assert.equal( LessDepth, 2, 'LessDepth is equal to 2' );
			assert.equal( LessEqualDepth, 3, 'LessEqualDepth is equal to 3' );
			assert.equal( EqualDepth, 4, 'EqualDepth is equal to 4' );
			assert.equal( GreaterEqualDepth, 5, 'GreaterEqualDepth is equal to 5' );
			assert.equal( GreaterDepth, 6, 'GreaterDepth is equal to 6' );
			assert.equal( NotEqualDepth, 7, 'NotEqualDepth is equal to 7' );
			assert.equal( MultiplyOperation, 0, 'MultiplyOperation is equal to 0' );
			assert.equal( MixOperation, 1, 'MixOperation is equal to 1' );
			assert.equal( AddOperation, 2, 'AddOperation is equal to 2' );
			assert.equal( NoToneMapping, 0, 'NoToneMapping is equal to 0' );
			assert.equal( LinearToneMapping, 1, 'LinearToneMapping is equal to 1' );
			assert.equal( ReinhardToneMapping, 2, 'ReinhardToneMapping is equal to 2' );
			assert.equal( Uncharted2ToneMapping, 3, 'Uncharted2ToneMapping is equal to 3' );
			assert.equal( CineonToneMapping, 4, 'CineonToneMapping is equal to 4' );
			assert.equal( UVMapping, 300, 'UVMapping is equal to 300' );
			assert.equal( CubeReflectionMapping, 301, 'CubeReflectionMapping is equal to 301' );
			assert.equal( CubeRefractionMapping, 302, 'CubeRefractionMapping is equal to 302' );
			assert.equal( EquirectangularReflectionMapping, 303, 'EquirectangularReflectionMapping is equal to 303' );
			assert.equal( EquirectangularRefractionMapping, 304, 'EquirectangularRefractionMapping is equal to 304' );
			assert.equal( SphericalReflectionMapping, 305, 'SphericalReflectionMapping is equal to 305' );
			assert.equal( CubeUVReflectionMapping, 306, 'CubeUVReflectionMapping is equal to 306' );
			assert.equal( CubeUVRefractionMapping, 307, 'CubeUVRefractionMapping is equal to 307' );
			assert.equal( RepeatWrapping, 1000, 'RepeatWrapping is equal to 1000' );
			assert.equal( ClampToEdgeWrapping, 1001, 'ClampToEdgeWrapping is equal to 1001' );
			assert.equal( MirroredRepeatWrapping, 1002, 'MirroredRepeatWrapping is equal to 1002' );
			assert.equal( NearestFilter, 1003, 'NearestFilter is equal to 1003' );
			assert.equal( NearestMipMapNearestFilter, 1004, 'NearestMipMapNearestFilter is equal to 1004' );
			assert.equal( NearestMipMapLinearFilter, 1005, 'NearestMipMapLinearFilter is equal to 1005' );
			assert.equal( LinearFilter, 1006, 'LinearFilter is equal to 1006' );
			assert.equal( LinearMipMapNearestFilter, 1007, 'LinearMipMapNearestFilter is equal to 1007' );
			assert.equal( LinearMipMapLinearFilter, 1008, 'LinearMipMapLinearFilter is equal to 1008' );
			assert.equal( UnsignedByteType, 1009, 'UnsignedByteType is equal to 1009' );
			assert.equal( ByteType, 1010, 'ByteType is equal to 1010' );
			assert.equal( ShortType, 1011, 'ShortType is equal to 1011' );
			assert.equal( UnsignedShortType, 1012, 'UnsignedShortType is equal to 1012' );
			assert.equal( IntType, 1013, 'IntType is equal to 1013' );
			assert.equal( UnsignedIntType, 1014, 'UnsignedIntType is equal to 1014' );
			assert.equal( FloatType, 1015, 'FloatType is equal to 1015' );
			assert.equal( HalfFloatType, 1016, 'HalfFloatType is equal to 1016' );
			assert.equal( UnsignedShort4444Type, 1017, 'UnsignedShort4444Type is equal to 1017' );
			assert.equal( UnsignedShort5551Type, 1018, 'UnsignedShort5551Type is equal to 1018' );
			assert.equal( UnsignedShort565Type, 1019, 'UnsignedShort565Type is equal to 1019' );
			assert.equal( UnsignedInt248Type, 1020, 'UnsignedInt248Type is equal to 1020' );
			assert.equal( AlphaFormat, 1021, 'AlphaFormat is equal to 1021' );
			assert.equal( RGBFormat, 1022, 'RGBFormat is equal to 1022' );
			assert.equal( RGBAFormat, 1023, 'RGBAFormat is equal to 1023' );
			assert.equal( LuminanceFormat, 1024, 'LuminanceFormat is equal to 1024' );
			assert.equal( LuminanceAlphaFormat, 1025, 'LuminanceAlphaFormat is equal to 1025' );
			assert.equal( RGBEFormat, RGBAFormat, 'RGBEFormat is equal to RGBAFormat' );
			assert.equal( DepthFormat, 1026, 'DepthFormat is equal to 1026' );
			assert.equal( DepthStencilFormat, 1027, 'DepthStencilFormat is equal to 1027' );
			assert.equal( RGB_S3TC_DXT1_Format, 2001, 'RGB_S3TC_DXT1_Format is equal to 2001' );
			assert.equal( RGBA_S3TC_DXT1_Format, 2002, 'RGBA_S3TC_DXT1_Format is equal to 2002' );
			assert.equal( RGBA_S3TC_DXT3_Format, 2003, 'RGBA_S3TC_DXT3_Format is equal to 2003' );
			assert.equal( RGBA_S3TC_DXT5_Format, 2004, 'RGBA_S3TC_DXT5_Format is equal to 2004' );
			assert.equal( RGB_PVRTC_4BPPV1_Format, 2100, 'RGB_PVRTC_4BPPV1_Format is equal to 2100' );
			assert.equal( RGB_PVRTC_2BPPV1_Format, 2101, 'RGB_PVRTC_2BPPV1_Format is equal to 2101' );
			assert.equal( RGBA_PVRTC_4BPPV1_Format, 2102, 'RGBA_PVRTC_4BPPV1_Format is equal to 2102' );
			assert.equal( RGBA_PVRTC_2BPPV1_Format, 2103, 'RGBA_PVRTC_2BPPV1_Format is equal to 2103' );
			assert.equal( RGB_ETC1_Format, 2151, 'RGB_ETC1_Format is equal to 2151' );
			assert.equal( LoopOnce, 2200, 'LoopOnce is equal to 2200' );
			assert.equal( LoopRepeat, 2201, 'LoopRepeat is equal to 2201' );
			assert.equal( LoopPingPong, 2202, 'LoopPingPong is equal to 2202' );
			assert.equal( InterpolateDiscrete, 2300, 'InterpolateDiscrete is equal to 2300' );
			assert.equal( InterpolateLinear, 2301, 'InterpolateLinear is equal to 2301' );
			assert.equal( InterpolateSmooth, 2302, 'InterpolateSmooth is equal to 2302' );
			assert.equal( ZeroCurvatureEnding, 2400, 'ZeroCurvatureEnding is equal to 2400' );
			assert.equal( ZeroSlopeEnding, 2401, 'ZeroSlopeEnding is equal to 2401' );
			assert.equal( WrapAroundEnding, 2402, 'WrapAroundEnding is equal to 2402' );
			assert.equal( TrianglesDrawMode, 0, 'TrianglesDrawMode is equal to 0' );
			assert.equal( TriangleStripDrawMode, 1, 'TriangleStripDrawMode is equal to 1' );
			assert.equal( TriangleFanDrawMode, 2, 'TriangleFanDrawMode is equal to 2' );
			assert.equal( LinearEncoding, 3000, 'LinearEncoding is equal to 3000' );
			assert.equal( sRGBEncoding, 3001, 'sRGBEncoding is equal to 3001' );
			assert.equal( GammaEncoding, 3007, 'GammaEncoding is equal to 3007' );
			assert.equal( RGBEEncoding, 3002, 'RGBEEncoding is equal to 3002' );
			assert.equal( LogLuvEncoding, 3003, 'LogLuvEncoding is equal to 3003' );
			assert.equal( RGBM7Encoding, 3004, 'RGBM7Encoding is equal to 3004' );
			assert.equal( RGBM16Encoding, 3005, 'RGBM16Encoding is equal to 3005' );
			assert.equal( RGBDEncoding, 3006, 'RGBDEncoding is equal to 3006' );
			assert.equal( BasicDepthPacking, 3200, 'BasicDepthPacking is equal to 3200' );
			assert.equal( RGBADepthPacking, 3201, 'RGBADepthPacking is equal to 3201' );

		} );

	} );

	// Polyfills

	if ( Number.EPSILON === undefined ) {

		Number.EPSILON = Math.pow( 2, - 52 );

	}

	if ( Number.isInteger === undefined ) {

		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger

		Number.isInteger = function ( value ) {

			return typeof value === 'number' && isFinite( value ) && Math.floor( value ) === value;

		};

	}

	//

	if ( Math.sign === undefined ) {

		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign

		Math.sign = function ( x ) {

			return ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : + x;

		};

	}

	if ( 'name' in Function.prototype === false ) {

		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name

		Object.defineProperty( Function.prototype, 'name', {

			get: function () {

				return this.toString().match( /^\s*function\s*([^\(\s]*)/ )[ 1 ];

			}

		} );

	}

	if ( Object.assign === undefined ) {

		// Missing in IE
		// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign

		( function () {

			Object.assign = function ( target ) {

				'use strict';

				if ( target === undefined || target === null ) {

					throw new TypeError( 'Cannot convert undefined or null to object' );

				}

				var output = Object( target );

				for ( var index = 1; index < arguments.length; index ++ ) {

					var source = arguments[ index ];

					if ( source !== undefined && source !== null ) {

						for ( var nextKey in source ) {

							if ( Object.prototype.hasOwnProperty.call( source, nextKey ) ) {

								output[ nextKey ] = source[ nextKey ];

							}

						}

					}

				}

				return output;

			};

		} )();

	}

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */

	var _Math = {

		DEG2RAD: Math.PI / 180,
		RAD2DEG: 180 / Math.PI,

		generateUUID: function () {

			// http://www.broofa.com/Tools/Math.uuid.htm
			// Replaced .join with string concatenation (@takahirox)

			var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split( '' );
			var rnd = 0, r;

			return function generateUUID() {

				var uuid = '';

				for ( var i = 0; i < 36; i ++ ) {

					if ( i === 8 || i === 13 || i === 18 || i === 23 ) {

						uuid += '-';

					} else if ( i === 14 ) {

						uuid += '4';

					} else {

						if ( rnd <= 0x02 ) rnd = 0x2000000 + ( Math.random() * 0x1000000 ) | 0;
						r = rnd & 0xf;
						rnd = rnd >> 4;
						uuid += chars[ ( i === 19 ) ? ( r & 0x3 ) | 0x8 : r ];

					}

				}

				return uuid;

			};

		}(),

		clamp: function ( value, min, max ) {

			return Math.max( min, Math.min( max, value ) );

		},

		// compute euclidian modulo of m % n
		// https://en.wikipedia.org/wiki/Modulo_operation

		euclideanModulo: function ( n, m ) {

			return ( ( n % m ) + m ) % m;

		},

		// Linear mapping from range <a1, a2> to range <b1, b2>

		mapLinear: function ( x, a1, a2, b1, b2 ) {

			return b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );

		},

		// https://en.wikipedia.org/wiki/Linear_interpolation

		lerp: function ( x, y, t ) {

			return ( 1 - t ) * x + t * y;

		},

		// http://en.wikipedia.org/wiki/Smoothstep

		smoothstep: function ( x, min, max ) {

			if ( x <= min ) return 0;
			if ( x >= max ) return 1;

			x = ( x - min ) / ( max - min );

			return x * x * ( 3 - 2 * x );

		},

		smootherstep: function ( x, min, max ) {

			if ( x <= min ) return 0;
			if ( x >= max ) return 1;

			x = ( x - min ) / ( max - min );

			return x * x * x * ( x * ( x * 6 - 15 ) + 10 );

		},

		// Random integer from <low, high> interval

		randInt: function ( low, high ) {

			return low + Math.floor( Math.random() * ( high - low + 1 ) );

		},

		// Random float from <low, high> interval

		randFloat: function ( low, high ) {

			return low + Math.random() * ( high - low );

		},

		// Random float from <-range/2, range/2> interval

		randFloatSpread: function ( range ) {

			return range * ( 0.5 - Math.random() );

		},

		degToRad: function ( degrees ) {

			return degrees * _Math.DEG2RAD;

		},

		radToDeg: function ( radians ) {

			return radians * _Math.RAD2DEG;

		},

		isPowerOfTwo: function ( value ) {

			return ( value & ( value - 1 ) ) === 0 && value !== 0;

		},

		ceilPowerOfTwo: function ( value ) {

			return Math.pow( 2, Math.ceil( Math.log( value ) / Math.LN2 ) );

		},

		floorPowerOfTwo: function ( value ) {

			return Math.pow( 2, Math.floor( Math.log( value ) / Math.LN2 ) );

		}

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author supereggbert / http://www.paulbrunt.co.uk/
	 * @author philogb / http://blog.thejit.org/
	 * @author jordi_ros / http://plattsoft.com
	 * @author D1plo1d / http://github.com/D1plo1d
	 * @author alteredq / http://alteredqualia.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author timknip / http://www.floorplanner.com/
	 * @author bhouston / http://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 */

	function Matrix4() {

		this.elements = [

			1, 0, 0, 0,
			0, 1, 0, 0,
			0, 0, 1, 0,
			0, 0, 0, 1

		];

		if ( arguments.length > 0 ) {

			console.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );

		}

	}

	Object.assign( Matrix4.prototype, {

		isMatrix4: true,

		set: function ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {

			var te = this.elements;

			te[ 0 ] = n11; te[ 4 ] = n12; te[ 8 ] = n13; te[ 12 ] = n14;
			te[ 1 ] = n21; te[ 5 ] = n22; te[ 9 ] = n23; te[ 13 ] = n24;
			te[ 2 ] = n31; te[ 6 ] = n32; te[ 10 ] = n33; te[ 14 ] = n34;
			te[ 3 ] = n41; te[ 7 ] = n42; te[ 11 ] = n43; te[ 15 ] = n44;

			return this;

		},

		identity: function () {

			this.set(

				1, 0, 0, 0,
				0, 1, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1

			);

			return this;

		},

		clone: function () {

			return new Matrix4().fromArray( this.elements );

		},

		copy: function ( m ) {

			var te = this.elements;
			var me = m.elements;

			te[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ]; te[ 3 ] = me[ 3 ];
			te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ]; te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ];
			te[ 8 ] = me[ 8 ]; te[ 9 ] = me[ 9 ]; te[ 10 ] = me[ 10 ]; te[ 11 ] = me[ 11 ];
			te[ 12 ] = me[ 12 ]; te[ 13 ] = me[ 13 ]; te[ 14 ] = me[ 14 ]; te[ 15 ] = me[ 15 ];

			return this;

		},

		copyPosition: function ( m ) {

			var te = this.elements, me = m.elements;

			te[ 12 ] = me[ 12 ];
			te[ 13 ] = me[ 13 ];
			te[ 14 ] = me[ 14 ];

			return this;

		},

		extractBasis: function ( xAxis, yAxis, zAxis ) {

			xAxis.setFromMatrixColumn( this, 0 );
			yAxis.setFromMatrixColumn( this, 1 );
			zAxis.setFromMatrixColumn( this, 2 );

			return this;

		},

		makeBasis: function ( xAxis, yAxis, zAxis ) {

			this.set(
				xAxis.x, yAxis.x, zAxis.x, 0,
				xAxis.y, yAxis.y, zAxis.y, 0,
				xAxis.z, yAxis.z, zAxis.z, 0,
				0, 0, 0, 1
			);

			return this;

		},

		extractRotation: function () {

			var v1 = new Vector3();

			return function extractRotation( m ) {

				var te = this.elements;
				var me = m.elements;

				var scaleX = 1 / v1.setFromMatrixColumn( m, 0 ).length();
				var scaleY = 1 / v1.setFromMatrixColumn( m, 1 ).length();
				var scaleZ = 1 / v1.setFromMatrixColumn( m, 2 ).length();

				te[ 0 ] = me[ 0 ] * scaleX;
				te[ 1 ] = me[ 1 ] * scaleX;
				te[ 2 ] = me[ 2 ] * scaleX;

				te[ 4 ] = me[ 4 ] * scaleY;
				te[ 5 ] = me[ 5 ] * scaleY;
				te[ 6 ] = me[ 6 ] * scaleY;

				te[ 8 ] = me[ 8 ] * scaleZ;
				te[ 9 ] = me[ 9 ] * scaleZ;
				te[ 10 ] = me[ 10 ] * scaleZ;

				return this;

			};

		}(),

		makeRotationFromEuler: function ( euler ) {

			if ( ! ( euler && euler.isEuler ) ) {

				console.error( 'THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );

			}

			var te = this.elements;

			var x = euler.x, y = euler.y, z = euler.z;
			var a = Math.cos( x ), b = Math.sin( x );
			var c = Math.cos( y ), d = Math.sin( y );
			var e = Math.cos( z ), f = Math.sin( z );

			if ( euler.order === 'XYZ' ) {

				var ae = a * e, af = a * f, be = b * e, bf = b * f;

				te[ 0 ] = c * e;
				te[ 4 ] = - c * f;
				te[ 8 ] = d;

				te[ 1 ] = af + be * d;
				te[ 5 ] = ae - bf * d;
				te[ 9 ] = - b * c;

				te[ 2 ] = bf - ae * d;
				te[ 6 ] = be + af * d;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'YXZ' ) {

				var ce = c * e, cf = c * f, de = d * e, df = d * f;

				te[ 0 ] = ce + df * b;
				te[ 4 ] = de * b - cf;
				te[ 8 ] = a * d;

				te[ 1 ] = a * f;
				te[ 5 ] = a * e;
				te[ 9 ] = - b;

				te[ 2 ] = cf * b - de;
				te[ 6 ] = df + ce * b;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'ZXY' ) {

				var ce = c * e, cf = c * f, de = d * e, df = d * f;

				te[ 0 ] = ce - df * b;
				te[ 4 ] = - a * f;
				te[ 8 ] = de + cf * b;

				te[ 1 ] = cf + de * b;
				te[ 5 ] = a * e;
				te[ 9 ] = df - ce * b;

				te[ 2 ] = - a * d;
				te[ 6 ] = b;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'ZYX' ) {

				var ae = a * e, af = a * f, be = b * e, bf = b * f;

				te[ 0 ] = c * e;
				te[ 4 ] = be * d - af;
				te[ 8 ] = ae * d + bf;

				te[ 1 ] = c * f;
				te[ 5 ] = bf * d + ae;
				te[ 9 ] = af * d - be;

				te[ 2 ] = - d;
				te[ 6 ] = b * c;
				te[ 10 ] = a * c;

			} else if ( euler.order === 'YZX' ) {

				var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

				te[ 0 ] = c * e;
				te[ 4 ] = bd - ac * f;
				te[ 8 ] = bc * f + ad;

				te[ 1 ] = f;
				te[ 5 ] = a * e;
				te[ 9 ] = - b * e;

				te[ 2 ] = - d * e;
				te[ 6 ] = ad * f + bc;
				te[ 10 ] = ac - bd * f;

			} else if ( euler.order === 'XZY' ) {

				var ac = a * c, ad = a * d, bc = b * c, bd = b * d;

				te[ 0 ] = c * e;
				te[ 4 ] = - f;
				te[ 8 ] = d * e;

				te[ 1 ] = ac * f + bd;
				te[ 5 ] = a * e;
				te[ 9 ] = ad * f - bc;

				te[ 2 ] = bc * f - ad;
				te[ 6 ] = b * e;
				te[ 10 ] = bd * f + ac;

			}

			// last column
			te[ 3 ] = 0;
			te[ 7 ] = 0;
			te[ 11 ] = 0;

			// bottom row
			te[ 12 ] = 0;
			te[ 13 ] = 0;
			te[ 14 ] = 0;
			te[ 15 ] = 1;

			return this;

		},

		makeRotationFromQuaternion: function ( q ) {

			var te = this.elements;

			var x = q._x, y = q._y, z = q._z, w = q._w;
			var x2 = x + x, y2 = y + y, z2 = z + z;
			var xx = x * x2, xy = x * y2, xz = x * z2;
			var yy = y * y2, yz = y * z2, zz = z * z2;
			var wx = w * x2, wy = w * y2, wz = w * z2;

			te[ 0 ] = 1 - ( yy + zz );
			te[ 4 ] = xy - wz;
			te[ 8 ] = xz + wy;

			te[ 1 ] = xy + wz;
			te[ 5 ] = 1 - ( xx + zz );
			te[ 9 ] = yz - wx;

			te[ 2 ] = xz - wy;
			te[ 6 ] = yz + wx;
			te[ 10 ] = 1 - ( xx + yy );

			// last column
			te[ 3 ] = 0;
			te[ 7 ] = 0;
			te[ 11 ] = 0;

			// bottom row
			te[ 12 ] = 0;
			te[ 13 ] = 0;
			te[ 14 ] = 0;
			te[ 15 ] = 1;

			return this;

		},

		lookAt: function () {

			var x = new Vector3();
			var y = new Vector3();
			var z = new Vector3();

			return function lookAt( eye, target, up ) {

				var te = this.elements;

				z.subVectors( eye, target );

				if ( z.lengthSq() === 0 ) {

					// eye and target are in the same position

					z.z = 1;

				}

				z.normalize();
				x.crossVectors( up, z );

				if ( x.lengthSq() === 0 ) {

					// up and z are parallel

					if ( Math.abs( up.z ) === 1 ) {

						z.x += 0.0001;

					} else {

						z.z += 0.0001;

					}

					z.normalize();
					x.crossVectors( up, z );

				}

				x.normalize();
				y.crossVectors( z, x );

				te[ 0 ] = x.x; te[ 4 ] = y.x; te[ 8 ] = z.x;
				te[ 1 ] = x.y; te[ 5 ] = y.y; te[ 9 ] = z.y;
				te[ 2 ] = x.z; te[ 6 ] = y.z; te[ 10 ] = z.z;

				return this;

			};

		}(),

		multiply: function ( m, n ) {

			if ( n !== undefined ) {

				console.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );
				return this.multiplyMatrices( m, n );

			}

			return this.multiplyMatrices( this, m );

		},

		premultiply: function ( m ) {

			return this.multiplyMatrices( m, this );

		},

		multiplyMatrices: function ( a, b ) {

			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;

			var a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];
			var a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];
			var a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];
			var a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];

			var b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];
			var b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];
			var b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];
			var b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];

			te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
			te[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
			te[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
			te[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;

			te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
			te[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
			te[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
			te[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;

			te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
			te[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
			te[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
			te[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;

			te[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
			te[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
			te[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
			te[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;

			return this;

		},

		multiplyScalar: function ( s ) {

			var te = this.elements;

			te[ 0 ] *= s; te[ 4 ] *= s; te[ 8 ] *= s; te[ 12 ] *= s;
			te[ 1 ] *= s; te[ 5 ] *= s; te[ 9 ] *= s; te[ 13 ] *= s;
			te[ 2 ] *= s; te[ 6 ] *= s; te[ 10 ] *= s; te[ 14 ] *= s;
			te[ 3 ] *= s; te[ 7 ] *= s; te[ 11 ] *= s; te[ 15 ] *= s;

			return this;

		},

		applyToBufferAttribute: function () {

			var v1 = new Vector3();

			return function applyToBufferAttribute( attribute ) {

				for ( var i = 0, l = attribute.count; i < l; i ++ ) {

					v1.x = attribute.getX( i );
					v1.y = attribute.getY( i );
					v1.z = attribute.getZ( i );

					v1.applyMatrix4( this );

					attribute.setXYZ( i, v1.x, v1.y, v1.z );

				}

				return attribute;

			};

		}(),

		determinant: function () {

			var te = this.elements;

			var n11 = te[ 0 ], n12 = te[ 4 ], n13 = te[ 8 ], n14 = te[ 12 ];
			var n21 = te[ 1 ], n22 = te[ 5 ], n23 = te[ 9 ], n24 = te[ 13 ];
			var n31 = te[ 2 ], n32 = te[ 6 ], n33 = te[ 10 ], n34 = te[ 14 ];
			var n41 = te[ 3 ], n42 = te[ 7 ], n43 = te[ 11 ], n44 = te[ 15 ];

			//TODO: make this more efficient
			//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )

			return (
				n41 * (
					+ n14 * n23 * n32
					 - n13 * n24 * n32
					 - n14 * n22 * n33
					 + n12 * n24 * n33
					 + n13 * n22 * n34
					 - n12 * n23 * n34
				) +
				n42 * (
					+ n11 * n23 * n34
					 - n11 * n24 * n33
					 + n14 * n21 * n33
					 - n13 * n21 * n34
					 + n13 * n24 * n31
					 - n14 * n23 * n31
				) +
				n43 * (
					+ n11 * n24 * n32
					 - n11 * n22 * n34
					 - n14 * n21 * n32
					 + n12 * n21 * n34
					 + n14 * n22 * n31
					 - n12 * n24 * n31
				) +
				n44 * (
					- n13 * n22 * n31
					 - n11 * n23 * n32
					 + n11 * n22 * n33
					 + n13 * n21 * n32
					 - n12 * n21 * n33
					 + n12 * n23 * n31
				)

			);

		},

		transpose: function () {

			var te = this.elements;
			var tmp;

			tmp = te[ 1 ]; te[ 1 ] = te[ 4 ]; te[ 4 ] = tmp;
			tmp = te[ 2 ]; te[ 2 ] = te[ 8 ]; te[ 8 ] = tmp;
			tmp = te[ 6 ]; te[ 6 ] = te[ 9 ]; te[ 9 ] = tmp;

			tmp = te[ 3 ]; te[ 3 ] = te[ 12 ]; te[ 12 ] = tmp;
			tmp = te[ 7 ]; te[ 7 ] = te[ 13 ]; te[ 13 ] = tmp;
			tmp = te[ 11 ]; te[ 11 ] = te[ 14 ]; te[ 14 ] = tmp;

			return this;

		},

		setPosition: function ( v ) {

			var te = this.elements;

			te[ 12 ] = v.x;
			te[ 13 ] = v.y;
			te[ 14 ] = v.z;

			return this;

		},

		getInverse: function ( m, throwOnDegenerate ) {

			// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
			var te = this.elements,
				me = m.elements,

				n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ], n41 = me[ 3 ],
				n12 = me[ 4 ], n22 = me[ 5 ], n32 = me[ 6 ], n42 = me[ 7 ],
				n13 = me[ 8 ], n23 = me[ 9 ], n33 = me[ 10 ], n43 = me[ 11 ],
				n14 = me[ 12 ], n24 = me[ 13 ], n34 = me[ 14 ], n44 = me[ 15 ],

				t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,
				t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,
				t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,
				t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;

			var det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;

			if ( det === 0 ) {

				var msg = "THREE.Matrix4: .getInverse() can't invert matrix, determinant is 0";

				if ( throwOnDegenerate === true ) {

					throw new Error( msg );

				} else {

					console.warn( msg );

				}

				return this.identity();

			}

			var detInv = 1 / det;

			te[ 0 ] = t11 * detInv;
			te[ 1 ] = ( n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44 ) * detInv;
			te[ 2 ] = ( n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44 ) * detInv;
			te[ 3 ] = ( n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43 ) * detInv;

			te[ 4 ] = t12 * detInv;
			te[ 5 ] = ( n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44 ) * detInv;
			te[ 6 ] = ( n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44 ) * detInv;
			te[ 7 ] = ( n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43 ) * detInv;

			te[ 8 ] = t13 * detInv;
			te[ 9 ] = ( n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44 ) * detInv;
			te[ 10 ] = ( n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44 ) * detInv;
			te[ 11 ] = ( n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43 ) * detInv;

			te[ 12 ] = t14 * detInv;
			te[ 13 ] = ( n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34 ) * detInv;
			te[ 14 ] = ( n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34 ) * detInv;
			te[ 15 ] = ( n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33 ) * detInv;

			return this;

		},

		scale: function ( v ) {

			var te = this.elements;
			var x = v.x, y = v.y, z = v.z;

			te[ 0 ] *= x; te[ 4 ] *= y; te[ 8 ] *= z;
			te[ 1 ] *= x; te[ 5 ] *= y; te[ 9 ] *= z;
			te[ 2 ] *= x; te[ 6 ] *= y; te[ 10 ] *= z;
			te[ 3 ] *= x; te[ 7 ] *= y; te[ 11 ] *= z;

			return this;

		},

		getMaxScaleOnAxis: function () {

			var te = this.elements;

			var scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];
			var scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];
			var scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];

			return Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );

		},

		makeTranslation: function ( x, y, z ) {

			this.set(

				1, 0, 0, x,
				0, 1, 0, y,
				0, 0, 1, z,
				0, 0, 0, 1

			);

			return this;

		},

		makeRotationX: function ( theta ) {

			var c = Math.cos( theta ), s = Math.sin( theta );

			this.set(

				1, 0, 0, 0,
				0, c, - s, 0,
				0, s, c, 0,
				0, 0, 0, 1

			);

			return this;

		},

		makeRotationY: function ( theta ) {

			var c = Math.cos( theta ), s = Math.sin( theta );

			this.set(

				 c, 0, s, 0,
				 0, 1, 0, 0,
				- s, 0, c, 0,
				 0, 0, 0, 1

			);

			return this;

		},

		makeRotationZ: function ( theta ) {

			var c = Math.cos( theta ), s = Math.sin( theta );

			this.set(

				c, - s, 0, 0,
				s, c, 0, 0,
				0, 0, 1, 0,
				0, 0, 0, 1

			);

			return this;

		},

		makeRotationAxis: function ( axis, angle ) {

			// Based on http://www.gamedev.net/reference/articles/article1199.asp

			var c = Math.cos( angle );
			var s = Math.sin( angle );
			var t = 1 - c;
			var x = axis.x, y = axis.y, z = axis.z;
			var tx = t * x, ty = t * y;

			this.set(

				tx * x + c, tx * y - s * z, tx * z + s * y, 0,
				tx * y + s * z, ty * y + c, ty * z - s * x, 0,
				tx * z - s * y, ty * z + s * x, t * z * z + c, 0,
				0, 0, 0, 1

			);

			 return this;

		},

		makeScale: function ( x, y, z ) {

			this.set(

				x, 0, 0, 0,
				0, y, 0, 0,
				0, 0, z, 0,
				0, 0, 0, 1

			);

			return this;

		},

		makeShear: function ( x, y, z ) {

			this.set(

				1, y, z, 0,
				x, 1, z, 0,
				x, y, 1, 0,
				0, 0, 0, 1

			);

			return this;

		},

		compose: function ( position, quaternion, scale ) {

			this.makeRotationFromQuaternion( quaternion );
			this.scale( scale );
			this.setPosition( position );

			return this;

		},

		decompose: function () {

			var vector = new Vector3();
			var matrix = new Matrix4();

			return function decompose( position, quaternion, scale ) {

				var te = this.elements;

				var sx = vector.set( te[ 0 ], te[ 1 ], te[ 2 ] ).length();
				var sy = vector.set( te[ 4 ], te[ 5 ], te[ 6 ] ).length();
				var sz = vector.set( te[ 8 ], te[ 9 ], te[ 10 ] ).length();

				// if determine is negative, we need to invert one scale
				var det = this.determinant();
				if ( det < 0 ) sx = - sx;

				position.x = te[ 12 ];
				position.y = te[ 13 ];
				position.z = te[ 14 ];

				// scale the rotation part
				matrix.copy( this );

				var invSX = 1 / sx;
				var invSY = 1 / sy;
				var invSZ = 1 / sz;

				matrix.elements[ 0 ] *= invSX;
				matrix.elements[ 1 ] *= invSX;
				matrix.elements[ 2 ] *= invSX;

				matrix.elements[ 4 ] *= invSY;
				matrix.elements[ 5 ] *= invSY;
				matrix.elements[ 6 ] *= invSY;

				matrix.elements[ 8 ] *= invSZ;
				matrix.elements[ 9 ] *= invSZ;
				matrix.elements[ 10 ] *= invSZ;

				quaternion.setFromRotationMatrix( matrix );

				scale.x = sx;
				scale.y = sy;
				scale.z = sz;

				return this;

			};

		}(),

		makePerspective: function ( left, right, top, bottom, near, far ) {

			if ( far === undefined ) {

				console.warn( 'THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.' );

			}

			var te = this.elements;
			var x = 2 * near / ( right - left );
			var y = 2 * near / ( top - bottom );

			var a = ( right + left ) / ( right - left );
			var b = ( top + bottom ) / ( top - bottom );
			var c = - ( far + near ) / ( far - near );
			var d = - 2 * far * near / ( far - near );

			te[ 0 ] = x;	te[ 4 ] = 0;	te[ 8 ] = a;	te[ 12 ] = 0;
			te[ 1 ] = 0;	te[ 5 ] = y;	te[ 9 ] = b;	te[ 13 ] = 0;
			te[ 2 ] = 0;	te[ 6 ] = 0;	te[ 10 ] = c;	te[ 14 ] = d;
			te[ 3 ] = 0;	te[ 7 ] = 0;	te[ 11 ] = - 1;	te[ 15 ] = 0;

			return this;

		},

		makeOrthographic: function ( left, right, top, bottom, near, far ) {

			var te = this.elements;
			var w = 1.0 / ( right - left );
			var h = 1.0 / ( top - bottom );
			var p = 1.0 / ( far - near );

			var x = ( right + left ) * w;
			var y = ( top + bottom ) * h;
			var z = ( far + near ) * p;

			te[ 0 ] = 2 * w;	te[ 4 ] = 0;	te[ 8 ] = 0;	te[ 12 ] = - x;
			te[ 1 ] = 0;	te[ 5 ] = 2 * h;	te[ 9 ] = 0;	te[ 13 ] = - y;
			te[ 2 ] = 0;	te[ 6 ] = 0;	te[ 10 ] = - 2 * p;	te[ 14 ] = - z;
			te[ 3 ] = 0;	te[ 7 ] = 0;	te[ 11 ] = 0;	te[ 15 ] = 1;

			return this;

		},

		equals: function ( matrix ) {

			var te = this.elements;
			var me = matrix.elements;

			for ( var i = 0; i < 16; i ++ ) {

				if ( te[ i ] !== me[ i ] ) return false;

			}

			return true;

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			for ( var i = 0; i < 16; i ++ ) {

				this.elements[ i ] = array[ i + offset ];

			}

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			var te = this.elements;

			array[ offset ] = te[ 0 ];
			array[ offset + 1 ] = te[ 1 ];
			array[ offset + 2 ] = te[ 2 ];
			array[ offset + 3 ] = te[ 3 ];

			array[ offset + 4 ] = te[ 4 ];
			array[ offset + 5 ] = te[ 5 ];
			array[ offset + 6 ] = te[ 6 ];
			array[ offset + 7 ] = te[ 7 ];

			array[ offset + 8 ] = te[ 8 ];
			array[ offset + 9 ] = te[ 9 ];
			array[ offset + 10 ] = te[ 10 ];
			array[ offset + 11 ] = te[ 11 ];

			array[ offset + 12 ] = te[ 12 ];
			array[ offset + 13 ] = te[ 13 ];
			array[ offset + 14 ] = te[ 14 ];
			array[ offset + 15 ] = te[ 15 ];

			return array;

		}

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author bhouston / http://clara.io
	 */

	function Quaternion( x, y, z, w ) {

		this._x = x || 0;
		this._y = y || 0;
		this._z = z || 0;
		this._w = ( w !== undefined ) ? w : 1;

	}

	Object.assign( Quaternion, {

		slerp: function ( qa, qb, qm, t ) {

			return qm.copy( qa ).slerp( qb, t );

		},

		slerpFlat: function ( dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {

			// fuzz-free, array-based Quaternion SLERP operation

			var x0 = src0[ srcOffset0 + 0 ],
				y0 = src0[ srcOffset0 + 1 ],
				z0 = src0[ srcOffset0 + 2 ],
				w0 = src0[ srcOffset0 + 3 ],

				x1 = src1[ srcOffset1 + 0 ],
				y1 = src1[ srcOffset1 + 1 ],
				z1 = src1[ srcOffset1 + 2 ],
				w1 = src1[ srcOffset1 + 3 ];

			if ( w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1 ) {

				var s = 1 - t,

					cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,

					dir = ( cos >= 0 ? 1 : - 1 ),
					sqrSin = 1 - cos * cos;

				// Skip the Slerp for tiny steps to avoid numeric problems:
				if ( sqrSin > Number.EPSILON ) {

					var sin = Math.sqrt( sqrSin ),
						len = Math.atan2( sin, cos * dir );

					s = Math.sin( s * len ) / sin;
					t = Math.sin( t * len ) / sin;

				}

				var tDir = t * dir;

				x0 = x0 * s + x1 * tDir;
				y0 = y0 * s + y1 * tDir;
				z0 = z0 * s + z1 * tDir;
				w0 = w0 * s + w1 * tDir;

				// Normalize in case we just did a lerp:
				if ( s === 1 - t ) {

					var f = 1 / Math.sqrt( x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0 );

					x0 *= f;
					y0 *= f;
					z0 *= f;
					w0 *= f;

				}

			}

			dst[ dstOffset ] = x0;
			dst[ dstOffset + 1 ] = y0;
			dst[ dstOffset + 2 ] = z0;
			dst[ dstOffset + 3 ] = w0;

		}

	} );

	Object.defineProperties( Quaternion.prototype, {

		x: {

			get: function () {

				return this._x;

			},

			set: function ( value ) {

				this._x = value;
				this.onChangeCallback();

			}

		},

		y: {

			get: function () {

				return this._y;

			},

			set: function ( value ) {

				this._y = value;
				this.onChangeCallback();

			}

		},

		z: {

			get: function () {

				return this._z;

			},

			set: function ( value ) {

				this._z = value;
				this.onChangeCallback();

			}

		},

		w: {

			get: function () {

				return this._w;

			},

			set: function ( value ) {

				this._w = value;
				this.onChangeCallback();

			}

		}

	} );

	Object.assign( Quaternion.prototype, {

		set: function ( x, y, z, w ) {

			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;

			this.onChangeCallback();

			return this;

		},

		clone: function () {

			return new this.constructor( this._x, this._y, this._z, this._w );

		},

		copy: function ( quaternion ) {

			this._x = quaternion.x;
			this._y = quaternion.y;
			this._z = quaternion.z;
			this._w = quaternion.w;

			this.onChangeCallback();

			return this;

		},

		setFromEuler: function ( euler, update ) {

			if ( ! ( euler && euler.isEuler ) ) {

				throw new Error( 'THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.' );

			}

			var x = euler._x, y = euler._y, z = euler._z, order = euler.order;

			// http://www.mathworks.com/matlabcentral/fileexchange/
			// 	20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
			//	content/SpinCalc.m

			var cos = Math.cos;
			var sin = Math.sin;

			var c1 = cos( x / 2 );
			var c2 = cos( y / 2 );
			var c3 = cos( z / 2 );

			var s1 = sin( x / 2 );
			var s2 = sin( y / 2 );
			var s3 = sin( z / 2 );

			if ( order === 'XYZ' ) {

				this._x = s1 * c2 * c3 + c1 * s2 * s3;
				this._y = c1 * s2 * c3 - s1 * c2 * s3;
				this._z = c1 * c2 * s3 + s1 * s2 * c3;
				this._w = c1 * c2 * c3 - s1 * s2 * s3;

			} else if ( order === 'YXZ' ) {

				this._x = s1 * c2 * c3 + c1 * s2 * s3;
				this._y = c1 * s2 * c3 - s1 * c2 * s3;
				this._z = c1 * c2 * s3 - s1 * s2 * c3;
				this._w = c1 * c2 * c3 + s1 * s2 * s3;

			} else if ( order === 'ZXY' ) {

				this._x = s1 * c2 * c3 - c1 * s2 * s3;
				this._y = c1 * s2 * c3 + s1 * c2 * s3;
				this._z = c1 * c2 * s3 + s1 * s2 * c3;
				this._w = c1 * c2 * c3 - s1 * s2 * s3;

			} else if ( order === 'ZYX' ) {

				this._x = s1 * c2 * c3 - c1 * s2 * s3;
				this._y = c1 * s2 * c3 + s1 * c2 * s3;
				this._z = c1 * c2 * s3 - s1 * s2 * c3;
				this._w = c1 * c2 * c3 + s1 * s2 * s3;

			} else if ( order === 'YZX' ) {

				this._x = s1 * c2 * c3 + c1 * s2 * s3;
				this._y = c1 * s2 * c3 + s1 * c2 * s3;
				this._z = c1 * c2 * s3 - s1 * s2 * c3;
				this._w = c1 * c2 * c3 - s1 * s2 * s3;

			} else if ( order === 'XZY' ) {

				this._x = s1 * c2 * c3 - c1 * s2 * s3;
				this._y = c1 * s2 * c3 - s1 * c2 * s3;
				this._z = c1 * c2 * s3 + s1 * s2 * c3;
				this._w = c1 * c2 * c3 + s1 * s2 * s3;

			}

			if ( update !== false ) this.onChangeCallback();

			return this;

		},

		setFromAxisAngle: function ( axis, angle ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm

			// assumes axis is normalized

			var halfAngle = angle / 2, s = Math.sin( halfAngle );

			this._x = axis.x * s;
			this._y = axis.y * s;
			this._z = axis.z * s;
			this._w = Math.cos( halfAngle );

			this.onChangeCallback();

			return this;

		},

		setFromRotationMatrix: function ( m ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var te = m.elements,

				m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
				m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
				m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ],

				trace = m11 + m22 + m33,
				s;

			if ( trace > 0 ) {

				s = 0.5 / Math.sqrt( trace + 1.0 );

				this._w = 0.25 / s;
				this._x = ( m32 - m23 ) * s;
				this._y = ( m13 - m31 ) * s;
				this._z = ( m21 - m12 ) * s;

			} else if ( m11 > m22 && m11 > m33 ) {

				s = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );

				this._w = ( m32 - m23 ) / s;
				this._x = 0.25 * s;
				this._y = ( m12 + m21 ) / s;
				this._z = ( m13 + m31 ) / s;

			} else if ( m22 > m33 ) {

				s = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );

				this._w = ( m13 - m31 ) / s;
				this._x = ( m12 + m21 ) / s;
				this._y = 0.25 * s;
				this._z = ( m23 + m32 ) / s;

			} else {

				s = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );

				this._w = ( m21 - m12 ) / s;
				this._x = ( m13 + m31 ) / s;
				this._y = ( m23 + m32 ) / s;
				this._z = 0.25 * s;

			}

			this.onChangeCallback();

			return this;

		},

		setFromUnitVectors: function () {

			// assumes direction vectors vFrom and vTo are normalized

			var v1 = new Vector3();
			var r;

			var EPS = 0.000001;

			return function setFromUnitVectors( vFrom, vTo ) {

				if ( v1 === undefined ) v1 = new Vector3();

				r = vFrom.dot( vTo ) + 1;

				if ( r < EPS ) {

					r = 0;

					if ( Math.abs( vFrom.x ) > Math.abs( vFrom.z ) ) {

						v1.set( - vFrom.y, vFrom.x, 0 );

					} else {

						v1.set( 0, - vFrom.z, vFrom.y );

					}

				} else {

					v1.crossVectors( vFrom, vTo );

				}

				this._x = v1.x;
				this._y = v1.y;
				this._z = v1.z;
				this._w = r;

				return this.normalize();

			};

		}(),

		inverse: function () {

			return this.conjugate().normalize();

		},

		conjugate: function () {

			this._x *= - 1;
			this._y *= - 1;
			this._z *= - 1;

			this.onChangeCallback();

			return this;

		},

		dot: function ( v ) {

			return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;

		},

		lengthSq: function () {

			return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;

		},

		length: function () {

			return Math.sqrt( this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w );

		},

		normalize: function () {

			var l = this.length();

			if ( l === 0 ) {

				this._x = 0;
				this._y = 0;
				this._z = 0;
				this._w = 1;

			} else {

				l = 1 / l;

				this._x = this._x * l;
				this._y = this._y * l;
				this._z = this._z * l;
				this._w = this._w * l;

			}

			this.onChangeCallback();

			return this;

		},

		multiply: function ( q, p ) {

			if ( p !== undefined ) {

				console.warn( 'THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.' );
				return this.multiplyQuaternions( q, p );

			}

			return this.multiplyQuaternions( this, q );

		},

		premultiply: function ( q ) {

			return this.multiplyQuaternions( q, this );

		},

		multiplyQuaternions: function ( a, b ) {

			// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm

			var qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;
			var qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;

			this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
			this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
			this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
			this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;

			this.onChangeCallback();

			return this;

		},

		slerp: function ( qb, t ) {

			if ( t === 0 ) return this;
			if ( t === 1 ) return this.copy( qb );

			var x = this._x, y = this._y, z = this._z, w = this._w;

			// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

			var cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;

			if ( cosHalfTheta < 0 ) {

				this._w = - qb._w;
				this._x = - qb._x;
				this._y = - qb._y;
				this._z = - qb._z;

				cosHalfTheta = - cosHalfTheta;

			} else {

				this.copy( qb );

			}

			if ( cosHalfTheta >= 1.0 ) {

				this._w = w;
				this._x = x;
				this._y = y;
				this._z = z;

				return this;

			}

			var sinHalfTheta = Math.sqrt( 1.0 - cosHalfTheta * cosHalfTheta );

			if ( Math.abs( sinHalfTheta ) < 0.001 ) {

				this._w = 0.5 * ( w + this._w );
				this._x = 0.5 * ( x + this._x );
				this._y = 0.5 * ( y + this._y );
				this._z = 0.5 * ( z + this._z );

				return this;

			}

			var halfTheta = Math.atan2( sinHalfTheta, cosHalfTheta );
			var ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,
				ratioB = Math.sin( t * halfTheta ) / sinHalfTheta;

			this._w = ( w * ratioA + this._w * ratioB );
			this._x = ( x * ratioA + this._x * ratioB );
			this._y = ( y * ratioA + this._y * ratioB );
			this._z = ( z * ratioA + this._z * ratioB );

			this.onChangeCallback();

			return this;

		},

		equals: function ( quaternion ) {

			return ( quaternion._x === this._x ) && ( quaternion._y === this._y ) && ( quaternion._z === this._z ) && ( quaternion._w === this._w );

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			this._x = array[ offset ];
			this._y = array[ offset + 1 ];
			this._z = array[ offset + 2 ];
			this._w = array[ offset + 3 ];

			this.onChangeCallback();

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			array[ offset ] = this._x;
			array[ offset + 1 ] = this._y;
			array[ offset + 2 ] = this._z;
			array[ offset + 3 ] = this._w;

			return array;

		},

		onChange: function ( callback ) {

			this.onChangeCallback = callback;

			return this;

		},

		onChangeCallback: function () {}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author kile / http://kile.stravaganza.org/
	 * @author philogb / http://blog.thejit.org/
	 * @author mikael emtinger / http://gomo.se/
	 * @author egraether / http://egraether.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */

	function Vector3( x, y, z ) {

		this.x = x || 0;
		this.y = y || 0;
		this.z = z || 0;

	}

	Object.assign( Vector3.prototype, {

		isVector3: true,

		set: function ( x, y, z ) {

			this.x = x;
			this.y = y;
			this.z = z;

			return this;

		},

		setScalar: function ( scalar ) {

			this.x = scalar;
			this.y = scalar;
			this.z = scalar;

			return this;

		},

		setX: function ( x ) {

			this.x = x;

			return this;

		},

		setY: function ( y ) {

			this.y = y;

			return this;

		},

		setZ: function ( z ) {

			this.z = z;

			return this;

		},

		setComponent: function ( index, value ) {

			switch ( index ) {

				case 0: this.x = value; break;
				case 1: this.y = value; break;
				case 2: this.z = value; break;
				default: throw new Error( 'index is out of range: ' + index );

			}

			return this;

		},

		getComponent: function ( index ) {

			switch ( index ) {

				case 0: return this.x;
				case 1: return this.y;
				case 2: return this.z;
				default: throw new Error( 'index is out of range: ' + index );

			}

		},

		clone: function () {

			return new this.constructor( this.x, this.y, this.z );

		},

		copy: function ( v ) {

			this.x = v.x;
			this.y = v.y;
			this.z = v.z;

			return this;

		},

		add: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );

			}

			this.x += v.x;
			this.y += v.y;
			this.z += v.z;

			return this;

		},

		addScalar: function ( s ) {

			this.x += s;
			this.y += s;
			this.z += s;

			return this;

		},

		addVectors: function ( a, b ) {

			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;

			return this;

		},

		addScaledVector: function ( v, s ) {

			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;

			return this;

		},

		sub: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );

			}

			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;

			return this;

		},

		subScalar: function ( s ) {

			this.x -= s;
			this.y -= s;
			this.z -= s;

			return this;

		},

		subVectors: function ( a, b ) {

			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;

			return this;

		},

		multiply: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.' );
				return this.multiplyVectors( v, w );

			}

			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;

			return this;

		},

		multiplyScalar: function ( scalar ) {

			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;

			return this;

		},

		multiplyVectors: function ( a, b ) {

			this.x = a.x * b.x;
			this.y = a.y * b.y;
			this.z = a.z * b.z;

			return this;

		},

		applyEuler: function () {

			var quaternion = new Quaternion();

			return function applyEuler( euler ) {

				if ( ! ( euler && euler.isEuler ) ) {

					console.error( 'THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.' );

				}

				return this.applyQuaternion( quaternion.setFromEuler( euler ) );

			};

		}(),

		applyAxisAngle: function () {

			var quaternion = new Quaternion();

			return function applyAxisAngle( axis, angle ) {

				return this.applyQuaternion( quaternion.setFromAxisAngle( axis, angle ) );

			};

		}(),

		applyMatrix3: function ( m ) {

			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ] * z;
			this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ] * z;
			this.z = e[ 2 ] * x + e[ 5 ] * y + e[ 8 ] * z;

			return this;

		},

		applyMatrix4: function ( m ) {

			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;

			var w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );

			this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;
			this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;
			this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;

			return this;

		},

		applyQuaternion: function ( q ) {

			var x = this.x, y = this.y, z = this.z;
			var qx = q.x, qy = q.y, qz = q.z, qw = q.w;

			// calculate quat * vector

			var ix = qw * x + qy * z - qz * y;
			var iy = qw * y + qz * x - qx * z;
			var iz = qw * z + qx * y - qy * x;
			var iw = - qx * x - qy * y - qz * z;

			// calculate result * inverse quat

			this.x = ix * qw + iw * - qx + iy * - qz - iz * - qy;
			this.y = iy * qw + iw * - qy + iz * - qx - ix * - qz;
			this.z = iz * qw + iw * - qz + ix * - qy - iy * - qx;

			return this;

		},

		project: function () {

			var matrix = new Matrix4();

			return function project( camera ) {

				matrix.multiplyMatrices( camera.projectionMatrix, matrix.getInverse( camera.matrixWorld ) );
				return this.applyMatrix4( matrix );

			};

		}(),

		unproject: function () {

			var matrix = new Matrix4();

			return function unproject( camera ) {

				matrix.multiplyMatrices( camera.matrixWorld, matrix.getInverse( camera.projectionMatrix ) );
				return this.applyMatrix4( matrix );

			};

		}(),

		transformDirection: function ( m ) {

			// input: THREE.Matrix4 affine matrix
			// vector interpreted as a direction

			var x = this.x, y = this.y, z = this.z;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z;
			this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z;
			this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z;

			return this.normalize();

		},

		divide: function ( v ) {

			this.x /= v.x;
			this.y /= v.y;
			this.z /= v.z;

			return this;

		},

		divideScalar: function ( scalar ) {

			return this.multiplyScalar( 1 / scalar );

		},

		min: function ( v ) {

			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
			this.z = Math.min( this.z, v.z );

			return this;

		},

		max: function ( v ) {

			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
			this.z = Math.max( this.z, v.z );

			return this;

		},

		clamp: function ( min, max ) {

			// assumes min < max, componentwise

			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
			this.z = Math.max( min.z, Math.min( max.z, this.z ) );

			return this;

		},

		clampScalar: function () {

			var min = new Vector3();
			var max = new Vector3();

			return function clampScalar( minVal, maxVal ) {

				min.set( minVal, minVal, minVal );
				max.set( maxVal, maxVal, maxVal );

				return this.clamp( min, max );

			};

		}(),

		clampLength: function ( min, max ) {

			var length = this.length();

			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );

		},

		floor: function () {

			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
			this.z = Math.floor( this.z );

			return this;

		},

		ceil: function () {

			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
			this.z = Math.ceil( this.z );

			return this;

		},

		round: function () {

			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
			this.z = Math.round( this.z );

			return this;

		},

		roundToZero: function () {

			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
			this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );

			return this;

		},

		negate: function () {

			this.x = - this.x;
			this.y = - this.y;
			this.z = - this.z;

			return this;

		},

		dot: function ( v ) {

			return this.x * v.x + this.y * v.y + this.z * v.z;

		},

		// TODO lengthSquared?

		lengthSq: function () {

			return this.x * this.x + this.y * this.y + this.z * this.z;

		},

		length: function () {

			return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z );

		},

		manhattanLength: function () {

			return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );

		},

		normalize: function () {

			return this.divideScalar( this.length() || 1 );

		},

		setLength: function ( length ) {

			return this.normalize().multiplyScalar( length );

		},

		lerp: function ( v, alpha ) {

			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
			this.z += ( v.z - this.z ) * alpha;

			return this;

		},

		lerpVectors: function ( v1, v2, alpha ) {

			return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );

		},

		cross: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.' );
				return this.crossVectors( v, w );

			}

			return this.crossVectors( this, v );

		},

		crossVectors: function ( a, b ) {

			var ax = a.x, ay = a.y, az = a.z;
			var bx = b.x, by = b.y, bz = b.z;

			this.x = ay * bz - az * by;
			this.y = az * bx - ax * bz;
			this.z = ax * by - ay * bx;

			return this;

		},

		projectOnVector: function ( vector ) {

			var scalar = vector.dot( this ) / vector.lengthSq();

			return this.copy( vector ).multiplyScalar( scalar );

		},

		projectOnPlane: function () {

			var v1 = new Vector3();

			return function projectOnPlane( planeNormal ) {

				v1.copy( this ).projectOnVector( planeNormal );

				return this.sub( v1 );

			};

		}(),

		reflect: function () {

			// reflect incident vector off plane orthogonal to normal
			// normal is assumed to have unit length

			var v1 = new Vector3();

			return function reflect( normal ) {

				return this.sub( v1.copy( normal ).multiplyScalar( 2 * this.dot( normal ) ) );

			};

		}(),

		angleTo: function ( v ) {

			var theta = this.dot( v ) / ( Math.sqrt( this.lengthSq() * v.lengthSq() ) );

			// clamp, to handle numerical problems

			return Math.acos( _Math.clamp( theta, - 1, 1 ) );

		},

		distanceTo: function ( v ) {

			return Math.sqrt( this.distanceToSquared( v ) );

		},

		distanceToSquared: function ( v ) {

			var dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;

			return dx * dx + dy * dy + dz * dz;

		},

		manhattanDistanceTo: function ( v ) {

			return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y ) + Math.abs( this.z - v.z );

		},

		setFromSpherical: function ( s ) {

			var sinPhiRadius = Math.sin( s.phi ) * s.radius;

			this.x = sinPhiRadius * Math.sin( s.theta );
			this.y = Math.cos( s.phi ) * s.radius;
			this.z = sinPhiRadius * Math.cos( s.theta );

			return this;

		},

		setFromCylindrical: function ( c ) {

			this.x = c.radius * Math.sin( c.theta );
			this.y = c.y;
			this.z = c.radius * Math.cos( c.theta );

			return this;

		},

		setFromMatrixPosition: function ( m ) {

			var e = m.elements;

			this.x = e[ 12 ];
			this.y = e[ 13 ];
			this.z = e[ 14 ];

			return this;

		},

		setFromMatrixScale: function ( m ) {

			var sx = this.setFromMatrixColumn( m, 0 ).length();
			var sy = this.setFromMatrixColumn( m, 1 ).length();
			var sz = this.setFromMatrixColumn( m, 2 ).length();

			this.x = sx;
			this.y = sy;
			this.z = sz;

			return this;

		},

		setFromMatrixColumn: function ( m, index ) {

			return this.fromArray( m.elements, index * 4 );

		},

		equals: function ( v ) {

			return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
			this.z = array[ offset + 2 ];

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
			array[ offset + 2 ] = this.z;

			return array;

		},

		fromBufferAttribute: function ( attribute, index, offset ) {

			if ( offset !== undefined ) {

				console.warn( 'THREE.Vector3: offset has been removed from .fromBufferAttribute().' );

			}

			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
			this.z = attribute.getZ( index );

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module.todo( 'Polyfills', () => {

		// PUBLIC STUFF
		QUnit.test( "Number.EPSILON", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "Number.isInteger", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		//https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
		//http://people.mozilla.org/~jorendorff/es6-draft.html#sec-math.sign
		/*
		 20.2.2.29 Math.sign(x)

		 Returns the sign of the x, indicating whether x is positive, negative or zero.

		 If x is NaN, the result is NaN.
		 If x is -0, the result is -0.
		 If x is +0, the result is +0.
		 If x is negative and not -0, the result is -1.
		 If x is positive and not +0, the result is +1.
		 */
		QUnit.test( "Math.sign", ( assert ) => {

			assert.ok( isNaN( Math.sign( NaN ) ), "If x is NaN<NaN>, the result is NaN." );
			assert.ok( isNaN( Math.sign( new Vector3() ) ), "If x is NaN<object>, the result is NaN." );
			assert.ok( isNaN( Math.sign() ), "If x is NaN<undefined>, the result is NaN." );
			assert.ok( isNaN( Math.sign( '--3' ) ), "If x is NaN<'--3'>, the result is NaN." );
			assert.ok( isNegativeZero( Math.sign( - 0 ) ), "If x is -0, the result is -0." );
			assert.ok( Math.sign( + 0 ) === + 0, "If x is +0, the result is +0." );
			assert.ok( Math.sign( - Infinity ) === - 1, "If x is negative<-Infinity> and not -0, the result is -1." );
			assert.ok( Math.sign( '-3' ) === - 1, "If x is negative<'-3'> and not -0, the result is -1." );
			assert.ok( Math.sign( '-1e-10' ) === - 1, "If x is negative<'-1e-10'> and not -0, the result is -1." );
			assert.ok( Math.sign( + Infinity ) === + 1, "If x is positive<+Infinity> and not +0, the result is +1." );
			assert.ok( Math.sign( '+3' ) === + 1, "If x is positive<'+3'> and not +0, the result is +1." );

			// Comparing with -0 is tricky because 0 === -0. But
			// luckily 1 / -0 === -Infinity so we can use that.

			function isNegativeZero( value ) {

				return value === 0 && 1 / value < 0;

			}

		} );

		QUnit.test( "'name' in Function.prototype", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

		QUnit.test( "Object.assign", ( assert ) => {

			assert.ok( false, "everything's gonna be alright" );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function arrayMin( array ) {

		if ( array.length === 0 ) return Infinity;

		var min = array[ 0 ];

		for ( var i = 1, l = array.length; i < l; ++ i ) {

			if ( array[ i ] < min ) min = array[ i ];

		}

		return min;

	}

	function arrayMax( array ) {

		if ( array.length === 0 ) return - Infinity;

		var max = array[ 0 ];

		for ( var i = 1, l = array.length; i < l; ++ i ) {

			if ( array[ i ] > max ) max = array[ i ];

		}

		return max;

	}

	/**
	 * @author alemures / https://github.com/alemures
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'utils', () => {

		QUnit.test( 'arrayMin', ( assert ) => {

			assert.equal( arrayMin( [] ), Infinity, 'Empty array return positive infinit' );
			assert.equal( arrayMin( [ 5 ] ), 5, 'Single valued array should return the unique value as minimum' );
			assert.equal( arrayMin( [ 1, 5, 10 ] ), 1, 'The array [ 1, 5, 10 ] return 1' );
			assert.equal( arrayMin( [ 5, 1, 10 ] ), 1, 'The array [ 5, 1, 10 ] return 1' );
			assert.equal( arrayMin( [ 10, 5, 1 ] ), 1, 'The array [ 10, 5, 1 ] return 1' );
			assert.equal( arrayMax( [ - 0, 0 ] ), - 0, 'The array [ - 0, 0 ] return -0' );
			assert.equal( arrayMin( [ - Infinity, 0, Infinity ] ), - Infinity, 'The array [ - Infinity, 0, Infinity ] return -Infinity' );

		} );

		QUnit.test( 'arrayMax', ( assert ) => {

			assert.equal( arrayMax( [] ), - Infinity, 'Empty array return negative infinit' );
			assert.equal( arrayMax( [ 5 ] ), 5, 'Single valued array should return the unique value as maximum' );
			assert.equal( arrayMax( [ 10, 5, 1 ] ), 10, 'The array [ 10, 5, 1 ] return 10' );
			assert.equal( arrayMax( [ 1, 10, 5 ] ), 10, 'The array [ 1, 10, 5 ] return 10' );
			assert.equal( arrayMax( [ 1, 5, 10 ] ), 10, 'The array [ 1, 5, 10 ] return 10' );
			assert.equal( arrayMax( [ - 0, 0 ] ), 0, 'The array [ - 0, 0 ] return 0' );
			assert.equal( arrayMax( [ - Infinity, 0, Infinity ] ), Infinity, 'The array [ - Infinity, 0, Infinity ] return Infinity' );

		} );


	} );

	/**
	 *
	 * Action provided by AnimationMixer for scheduling clip playback on specific
	 * objects.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 *
	 */

	function AnimationAction( mixer, clip, localRoot ) {

		this._mixer = mixer;
		this._clip = clip;
		this._localRoot = localRoot || null;

		var tracks = clip.tracks,
			nTracks = tracks.length,
			interpolants = new Array( nTracks );

		var interpolantSettings = {
			endingStart: ZeroCurvatureEnding,
			endingEnd: ZeroCurvatureEnding
		};

		for ( var i = 0; i !== nTracks; ++ i ) {

			var interpolant = tracks[ i ].createInterpolant( null );
			interpolants[ i ] = interpolant;
			interpolant.settings = interpolantSettings;

		}

		this._interpolantSettings = interpolantSettings;

		this._interpolants = interpolants;	// bound by the mixer

		// inside: PropertyMixer (managed by the mixer)
		this._propertyBindings = new Array( nTracks );

		this._cacheIndex = null;			// for the memory manager
		this._byClipCacheIndex = null;		// for the memory manager

		this._timeScaleInterpolant = null;
		this._weightInterpolant = null;

		this.loop = LoopRepeat;
		this._loopCount = - 1;

		// global mixer time when the action is to be started
		// it's set back to 'null' upon start of the action
		this._startTime = null;

		// scaled local time of the action
		// gets clamped or wrapped to 0..clip.duration according to loop
		this.time = 0;

		this.timeScale = 1;
		this._effectiveTimeScale = 1;

		this.weight = 1;
		this._effectiveWeight = 1;

		this.repetitions = Infinity; 		// no. of repetitions when looping

		this.paused = false;				// true -> zero effective time scale
		this.enabled = true;				// false -> zero effective weight

		this.clampWhenFinished 	= false;	// keep feeding the last frame?

		this.zeroSlopeAtStart 	= true;		// for smooth interpolation w/o separate
		this.zeroSlopeAtEnd		= true;		// clips for start, loop and end

	}

	Object.assign( AnimationAction.prototype, {

		// State & Scheduling

		play: function () {

			this._mixer._activateAction( this );

			return this;

		},

		stop: function () {

			this._mixer._deactivateAction( this );

			return this.reset();

		},

		reset: function () {

			this.paused = false;
			this.enabled = true;

			this.time = 0;			// restart clip
			this._loopCount = - 1;	// forget previous loops
			this._startTime = null;	// forget scheduling

			return this.stopFading().stopWarping();

		},

		isRunning: function () {

			return this.enabled && ! this.paused && this.timeScale !== 0 &&
					this._startTime === null && this._mixer._isActiveAction( this );

		},

		// return true when play has been called
		isScheduled: function () {

			return this._mixer._isActiveAction( this );

		},

		startAt: function ( time ) {

			this._startTime = time;

			return this;

		},

		setLoop: function ( mode, repetitions ) {

			this.loop = mode;
			this.repetitions = repetitions;

			return this;

		},

		// Weight

		// set the weight stopping any scheduled fading
		// although .enabled = false yields an effective weight of zero, this
		// method does *not* change .enabled, because it would be confusing
		setEffectiveWeight: function ( weight ) {

			this.weight = weight;

			// note: same logic as when updated at runtime
			this._effectiveWeight = this.enabled ? weight : 0;

			return this.stopFading();

		},

		// return the weight considering fading and .enabled
		getEffectiveWeight: function () {

			return this._effectiveWeight;

		},

		fadeIn: function ( duration ) {

			return this._scheduleFading( duration, 0, 1 );

		},

		fadeOut: function ( duration ) {

			return this._scheduleFading( duration, 1, 0 );

		},

		crossFadeFrom: function ( fadeOutAction, duration, warp ) {

			fadeOutAction.fadeOut( duration );
			this.fadeIn( duration );

			if ( warp ) {

				var fadeInDuration = this._clip.duration,
					fadeOutDuration = fadeOutAction._clip.duration,

					startEndRatio = fadeOutDuration / fadeInDuration,
					endStartRatio = fadeInDuration / fadeOutDuration;

				fadeOutAction.warp( 1.0, startEndRatio, duration );
				this.warp( endStartRatio, 1.0, duration );

			}

			return this;

		},

		crossFadeTo: function ( fadeInAction, duration, warp ) {

			return fadeInAction.crossFadeFrom( this, duration, warp );

		},

		stopFading: function () {

			var weightInterpolant = this._weightInterpolant;

			if ( weightInterpolant !== null ) {

				this._weightInterpolant = null;
				this._mixer._takeBackControlInterpolant( weightInterpolant );

			}

			return this;

		},

		// Time Scale Control

		// set the time scale stopping any scheduled warping
		// although .paused = true yields an effective time scale of zero, this
		// method does *not* change .paused, because it would be confusing
		setEffectiveTimeScale: function ( timeScale ) {

			this.timeScale = timeScale;
			this._effectiveTimeScale = this.paused ? 0 : timeScale;

			return this.stopWarping();

		},

		// return the time scale considering warping and .paused
		getEffectiveTimeScale: function () {

			return this._effectiveTimeScale;

		},

		setDuration: function ( duration ) {

			this.timeScale = this._clip.duration / duration;

			return this.stopWarping();

		},

		syncWith: function ( action ) {

			this.time = action.time;
			this.timeScale = action.timeScale;

			return this.stopWarping();

		},

		halt: function ( duration ) {

			return this.warp( this._effectiveTimeScale, 0, duration );

		},

		warp: function ( startTimeScale, endTimeScale, duration ) {

			var mixer = this._mixer, now = mixer.time,
				interpolant = this._timeScaleInterpolant,

				timeScale = this.timeScale;

			if ( interpolant === null ) {

				interpolant = mixer._lendControlInterpolant();
				this._timeScaleInterpolant = interpolant;

			}

			var times = interpolant.parameterPositions,
				values = interpolant.sampleValues;

			times[ 0 ] = now;
			times[ 1 ] = now + duration;

			values[ 0 ] = startTimeScale / timeScale;
			values[ 1 ] = endTimeScale / timeScale;

			return this;

		},

		stopWarping: function () {

			var timeScaleInterpolant = this._timeScaleInterpolant;

			if ( timeScaleInterpolant !== null ) {

				this._timeScaleInterpolant = null;
				this._mixer._takeBackControlInterpolant( timeScaleInterpolant );

			}

			return this;

		},

		// Object Accessors

		getMixer: function () {

			return this._mixer;

		},

		getClip: function () {

			return this._clip;

		},

		getRoot: function () {

			return this._localRoot || this._mixer._root;

		},

		// Interna

		_update: function ( time, deltaTime, timeDirection, accuIndex ) {

			// called by the mixer

			if ( ! this.enabled ) {

				// call ._updateWeight() to update ._effectiveWeight

				this._updateWeight( time );
				return;

			}

			var startTime = this._startTime;

			if ( startTime !== null ) {

				// check for scheduled start of action

				var timeRunning = ( time - startTime ) * timeDirection;
				if ( timeRunning < 0 || timeDirection === 0 ) {

					return; // yet to come / don't decide when delta = 0

				}

				// start

				this._startTime = null; // unschedule
				deltaTime = timeDirection * timeRunning;

			}

			// apply time scale and advance time

			deltaTime *= this._updateTimeScale( time );
			var clipTime = this._updateTime( deltaTime );

			// note: _updateTime may disable the action resulting in
			// an effective weight of 0

			var weight = this._updateWeight( time );

			if ( weight > 0 ) {

				var interpolants = this._interpolants;
				var propertyMixers = this._propertyBindings;

				for ( var j = 0, m = interpolants.length; j !== m; ++ j ) {

					interpolants[ j ].evaluate( clipTime );
					propertyMixers[ j ].accumulate( accuIndex, weight );

				}

			}

		},

		_updateWeight: function ( time ) {

			var weight = 0;

			if ( this.enabled ) {

				weight = this.weight;
				var interpolant = this._weightInterpolant;

				if ( interpolant !== null ) {

					var interpolantValue = interpolant.evaluate( time )[ 0 ];

					weight *= interpolantValue;

					if ( time > interpolant.parameterPositions[ 1 ] ) {

						this.stopFading();

						if ( interpolantValue === 0 ) {

							// faded out, disable
							this.enabled = false;

						}

					}

				}

			}

			this._effectiveWeight = weight;
			return weight;

		},

		_updateTimeScale: function ( time ) {

			var timeScale = 0;

			if ( ! this.paused ) {

				timeScale = this.timeScale;

				var interpolant = this._timeScaleInterpolant;

				if ( interpolant !== null ) {

					var interpolantValue = interpolant.evaluate( time )[ 0 ];

					timeScale *= interpolantValue;

					if ( time > interpolant.parameterPositions[ 1 ] ) {

						this.stopWarping();

						if ( timeScale === 0 ) {

							// motion has halted, pause
							this.paused = true;

						} else {

							// warp done - apply final time scale
							this.timeScale = timeScale;

						}

					}

				}

			}

			this._effectiveTimeScale = timeScale;
			return timeScale;

		},

		_updateTime: function ( deltaTime ) {

			var time = this.time + deltaTime;

			if ( deltaTime === 0 ) return time;

			var duration = this._clip.duration,

				loop = this.loop,
				loopCount = this._loopCount;

			if ( loop === LoopOnce ) {

				if ( loopCount === - 1 ) {

					// just started

					this._loopCount = 0;
					this._setEndings( true, true, false );

				}

				handle_stop: {

					if ( time >= duration ) {

						time = duration;

					} else if ( time < 0 ) {

						time = 0;

					} else break handle_stop;

					if ( this.clampWhenFinished ) this.paused = true;
					else this.enabled = false;

					this._mixer.dispatchEvent( {
						type: 'finished', action: this,
						direction: deltaTime < 0 ? - 1 : 1
					} );

				}

			} else { // repetitive Repeat or PingPong

				var pingPong = ( loop === LoopPingPong );

				if ( loopCount === - 1 ) {

					// just started

					if ( deltaTime >= 0 ) {

						loopCount = 0;

						this._setEndings( true, this.repetitions === 0, pingPong );

					} else {

						// when looping in reverse direction, the initial
						// transition through zero counts as a repetition,
						// so leave loopCount at -1

						this._setEndings( this.repetitions === 0, true, pingPong );

					}

				}

				if ( time >= duration || time < 0 ) {

					// wrap around

					var loopDelta = Math.floor( time / duration ); // signed
					time -= duration * loopDelta;

					loopCount += Math.abs( loopDelta );

					var pending = this.repetitions - loopCount;

					if ( pending < 0 ) {

						// have to stop (switch state, clamp time, fire event)

						if ( this.clampWhenFinished ) this.paused = true;
						else this.enabled = false;

						time = deltaTime > 0 ? duration : 0;

						this._mixer.dispatchEvent( {
							type: 'finished', action: this,
							direction: deltaTime > 0 ? 1 : - 1
						} );

					} else {

						// keep running

						if ( pending === 0 ) {

							// entering the last round

							var atStart = deltaTime < 0;
							this._setEndings( atStart, ! atStart, pingPong );

						} else {

							this._setEndings( false, false, pingPong );

						}

						this._loopCount = loopCount;

						this._mixer.dispatchEvent( {
							type: 'loop', action: this, loopDelta: loopDelta
						} );

					}

				}

				if ( pingPong && ( loopCount & 1 ) === 1 ) {

					// invert time for the "pong round"

					this.time = time;
					return duration - time;

				}

			}

			this.time = time;
			return time;

		},

		_setEndings: function ( atStart, atEnd, pingPong ) {

			var settings = this._interpolantSettings;

			if ( pingPong ) {

				settings.endingStart 	= ZeroSlopeEnding;
				settings.endingEnd		= ZeroSlopeEnding;

			} else {

				// assuming for LoopOnce atStart == atEnd == true

				if ( atStart ) {

					settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;

				} else {

					settings.endingStart = WrapAroundEnding;

				}

				if ( atEnd ) {

					settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;

				} else {

					settings.endingEnd 	 = WrapAroundEnding;

				}

			}

		},

		_scheduleFading: function ( duration, weightNow, weightThen ) {

			var mixer = this._mixer, now = mixer.time,
				interpolant = this._weightInterpolant;

			if ( interpolant === null ) {

				interpolant = mixer._lendControlInterpolant();
				this._weightInterpolant = interpolant;

			}

			var times = interpolant.parameterPositions,
				values = interpolant.sampleValues;

			times[ 0 ] = now; 				values[ 0 ] = weightNow;
			times[ 1 ] = now + duration;	values[ 1 ] = weightThen;

			return this;

		}

	} );

	/**
	 * https://github.com/mrdoob/eventdispatcher.js/
	 */

	function EventDispatcher() {}

	Object.assign( EventDispatcher.prototype, {

		addEventListener: function ( type, listener ) {

			if ( this._listeners === undefined ) this._listeners = {};

			var listeners = this._listeners;

			if ( listeners[ type ] === undefined ) {

				listeners[ type ] = [];

			}

			if ( listeners[ type ].indexOf( listener ) === - 1 ) {

				listeners[ type ].push( listener );

			}

		},

		hasEventListener: function ( type, listener ) {

			if ( this._listeners === undefined ) return false;

			var listeners = this._listeners;

			return listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1;

		},

		removeEventListener: function ( type, listener ) {

			if ( this._listeners === undefined ) return;

			var listeners = this._listeners;
			var listenerArray = listeners[ type ];

			if ( listenerArray !== undefined ) {

				var index = listenerArray.indexOf( listener );

				if ( index !== - 1 ) {

					listenerArray.splice( index, 1 );

				}

			}

		},

		dispatchEvent: function ( event ) {

			if ( this._listeners === undefined ) return;

			var listeners = this._listeners;
			var listenerArray = listeners[ event.type ];

			if ( listenerArray !== undefined ) {

				event.target = this;

				var array = listenerArray.slice( 0 );

				for ( var i = 0, l = array.length; i < l; i ++ ) {

					array[ i ].call( this, event );

				}

			}

		}

	} );

	/**
	 * Abstract base class of interpolants over parametric samples.
	 *
	 * The parameter domain is one dimensional, typically the time or a path
	 * along a curve defined by the data.
	 *
	 * The sample values can have any dimensionality and derived classes may
	 * apply special interpretations to the data.
	 *
	 * This class provides the interval seek in a Template Method, deferring
	 * the actual interpolation to derived classes.
	 *
	 * Time complexity is O(1) for linear access crossing at most two points
	 * and O(log N) for random access, where N is the number of positions.
	 *
	 * References:
	 *
	 * 		http://www.oodesign.com/template-method-pattern.html
	 *
	 * @author tschw
	 */

	function Interpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		this.parameterPositions = parameterPositions;
		this._cachedIndex = 0;

		this.resultBuffer = resultBuffer !== undefined ?
			resultBuffer : new sampleValues.constructor( sampleSize );
		this.sampleValues = sampleValues;
		this.valueSize = sampleSize;

	}

	Object.assign( Interpolant.prototype, {

		evaluate: function ( t ) {

			var pp = this.parameterPositions,
				i1 = this._cachedIndex,

				t1 = pp[ i1 ],
				t0 = pp[ i1 - 1 ];

			validate_interval: {

				seek: {

					var right;

					linear_scan: {

						//- See http://jsperf.com/comparison-to-undefined/3
						//- slower code:
						//-
						//- 				if ( t >= t1 || t1 === undefined ) {
						forward_scan: if ( ! ( t < t1 ) ) {

							for ( var giveUpAt = i1 + 2; ; ) {

								if ( t1 === undefined ) {

									if ( t < t0 ) break forward_scan;

									// after end

									i1 = pp.length;
									this._cachedIndex = i1;
									return this.afterEnd_( i1 - 1, t, t0 );

								}

								if ( i1 === giveUpAt ) break; // this loop

								t0 = t1;
								t1 = pp[ ++ i1 ];

								if ( t < t1 ) {

									// we have arrived at the sought interval
									break seek;

								}

							}

							// prepare binary search on the right side of the index
							right = pp.length;
							break linear_scan;

						}

						//- slower code:
						//-					if ( t < t0 || t0 === undefined ) {
						if ( ! ( t >= t0 ) ) {

							// looping?

							var t1global = pp[ 1 ];

							if ( t < t1global ) {

								i1 = 2; // + 1, using the scan for the details
								t0 = t1global;

							}

							// linear reverse scan

							for ( var giveUpAt = i1 - 2; ; ) {

								if ( t0 === undefined ) {

									// before start

									this._cachedIndex = 0;
									return this.beforeStart_( 0, t, t1 );

								}

								if ( i1 === giveUpAt ) break; // this loop

								t1 = t0;
								t0 = pp[ -- i1 - 1 ];

								if ( t >= t0 ) {

									// we have arrived at the sought interval
									break seek;

								}

							}

							// prepare binary search on the left side of the index
							right = i1;
							i1 = 0;
							break linear_scan;

						}

						// the interval is valid

						break validate_interval;

					} // linear scan

					// binary search

					while ( i1 < right ) {

						var mid = ( i1 + right ) >>> 1;

						if ( t < pp[ mid ] ) {

							right = mid;

						} else {

							i1 = mid + 1;

						}

					}

					t1 = pp[ i1 ];
					t0 = pp[ i1 - 1 ];

					// check boundary cases, again

					if ( t0 === undefined ) {

						this._cachedIndex = 0;
						return this.beforeStart_( 0, t, t1 );

					}

					if ( t1 === undefined ) {

						i1 = pp.length;
						this._cachedIndex = i1;
						return this.afterEnd_( i1 - 1, t0, t );

					}

				} // seek

				this._cachedIndex = i1;

				this.intervalChanged_( i1, t0, t1 );

			} // validate_interval

			return this.interpolate_( i1, t0, t, t1 );

		},

		settings: null, // optional, subclass-specific settings structure
		// Note: The indirection allows central control of many interpolants.

		// --- Protected interface

		DefaultSettings_: {},

		getSettings_: function () {

			return this.settings || this.DefaultSettings_;

		},

		copySampleValue_: function ( index ) {

			// copies a sample value to the result buffer

			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,
				offset = index * stride;

			for ( var i = 0; i !== stride; ++ i ) {

				result[ i ] = values[ offset + i ];

			}

			return result;

		},

		// Template methods for derived classes:

		interpolate_: function ( /* i1, t0, t, t1 */ ) {

			throw new Error( 'call to abstract method' );
			// implementations shall return this.resultBuffer

		},

		intervalChanged_: function ( /* i1, t0, t1 */ ) {

			// empty

		}

	} );

	//!\ DECLARE ALIAS AFTER assign prototype !
	Object.assign( Interpolant.prototype, {

		//( 0, t, t0 ), returns this.resultBuffer
		beforeStart_: Interpolant.prototype.copySampleValue_,

		//( N-1, tN-1, t ), returns this.resultBuffer
		afterEnd_: Interpolant.prototype.copySampleValue_,

	} );

	/**
	 * @author tschw
	 */

	function LinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

	}

	LinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

		constructor: LinearInterpolant,

		interpolate_: function ( i1, t0, t, t1 ) {

			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,

				offset1 = i1 * stride,
				offset0 = offset1 - stride,

				weight1 = ( t - t0 ) / ( t1 - t0 ),
				weight0 = 1 - weight1;

			for ( var i = 0; i !== stride; ++ i ) {

				result[ i ] =
						values[ offset0 + i ] * weight0 +
						values[ offset1 + i ] * weight1;

			}

			return result;

		}

	} );

	/**
	 *
	 * A reference to a real property in the scene graph.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function Composite( targetGroup, path, optionalParsedPath ) {

		var parsedPath = optionalParsedPath || PropertyBinding.parseTrackName( path );

		this._targetGroup = targetGroup;
		this._bindings = targetGroup.subscribe_( path, parsedPath );

	}

	Object.assign( Composite.prototype, {

		getValue: function ( array, offset ) {

			this.bind(); // bind all binding

			var firstValidIndex = this._targetGroup.nCachedObjects_,
				binding = this._bindings[ firstValidIndex ];

			// and only call .getValue on the first
			if ( binding !== undefined ) binding.getValue( array, offset );

		},

		setValue: function ( array, offset ) {

			var bindings = this._bindings;

			for ( var i = this._targetGroup.nCachedObjects_,
					  n = bindings.length; i !== n; ++ i ) {

				bindings[ i ].setValue( array, offset );

			}

		},

		bind: function () {

			var bindings = this._bindings;

			for ( var i = this._targetGroup.nCachedObjects_,
					  n = bindings.length; i !== n; ++ i ) {

				bindings[ i ].bind();

			}

		},

		unbind: function () {

			var bindings = this._bindings;

			for ( var i = this._targetGroup.nCachedObjects_,
					  n = bindings.length; i !== n; ++ i ) {

				bindings[ i ].unbind();

			}

		}

	} );


	function PropertyBinding( rootNode, path, parsedPath ) {

		this.path = path;
		this.parsedPath = parsedPath || PropertyBinding.parseTrackName( path );

		this.node = PropertyBinding.findNode( rootNode, this.parsedPath.nodeName ) || rootNode;

		this.rootNode = rootNode;

	}

	Object.assign( PropertyBinding, {

		Composite: Composite,

		create: function ( root, path, parsedPath ) {

			if ( ! ( root && root.isAnimationObjectGroup ) ) {

				return new PropertyBinding( root, path, parsedPath );

			} else {

				return new PropertyBinding.Composite( root, path, parsedPath );

			}

		},

		/**
		 * Replaces spaces with underscores and removes unsupported characters from
		 * node names, to ensure compatibility with parseTrackName().
		 *
		 * @param  {string} name Node name to be sanitized.
		 * @return {string}
		 */
		sanitizeNodeName: function ( name ) {

			return name.replace( /\s/g, '_' ).replace( /[^\w-]/g, '' );

		},

		parseTrackName: function () {

			// Parent directories, delimited by '/' or ':'. Currently unused, but must
			// be matched to parse the rest of the track name.
			var directoryRe = /((?:[\w-]+[\/:])*)/;

			// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.
			var nodeRe = /([\w-\.]+)?/;

			// Object on target node, and accessor. Name may contain only word
			// characters. Accessor may contain any character except closing bracket.
			var objectRe = /(?:\.([\w-]+)(?:\[(.+)\])?)?/;

			// Property and accessor. May contain only word characters. Accessor may
			// contain any non-bracket characters.
			var propertyRe = /\.([\w-]+)(?:\[(.+)\])?/;

			var trackRe = new RegExp( ''
				+ '^'
				+ directoryRe.source
				+ nodeRe.source
				+ objectRe.source
				+ propertyRe.source
				+ '$'
			);

			var supportedObjectNames = [ 'material', 'materials', 'bones' ];

			return function ( trackName ) {

				var matches = trackRe.exec( trackName );

				if ( ! matches ) {

					throw new Error( 'PropertyBinding: Cannot parse trackName: ' + trackName );

				}

				var results = {
					// directoryName: matches[ 1 ], // (tschw) currently unused
					nodeName: matches[ 2 ],
					objectName: matches[ 3 ],
					objectIndex: matches[ 4 ],
					propertyName: matches[ 5 ], // required
					propertyIndex: matches[ 6 ]
				};

				var lastDot = results.nodeName && results.nodeName.lastIndexOf( '.' );

				if ( lastDot !== undefined && lastDot !== - 1 ) {

					var objectName = results.nodeName.substring( lastDot + 1 );

					// Object names must be checked against a whitelist. Otherwise, there
					// is no way to parse 'foo.bar.baz': 'baz' must be a property, but
					// 'bar' could be the objectName, or part of a nodeName (which can
					// include '.' characters).
					if ( supportedObjectNames.indexOf( objectName ) !== - 1 ) {

						results.nodeName = results.nodeName.substring( 0, lastDot );
						results.objectName = objectName;

					}

				}

				if ( results.propertyName === null || results.propertyName.length === 0 ) {

					throw new Error( 'PropertyBinding: can not parse propertyName from trackName: ' + trackName );

				}

				return results;

			};

		}(),

		findNode: function ( root, nodeName ) {

			if ( ! nodeName || nodeName === "" || nodeName === "root" || nodeName === "." || nodeName === - 1 || nodeName === root.name || nodeName === root.uuid ) {

				return root;

			}

			// search into skeleton bones.
			if ( root.skeleton ) {

				var searchSkeleton = function ( skeleton ) {

					for ( var i = 0; i < skeleton.bones.length; i ++ ) {

						var bone = skeleton.bones[ i ];

						if ( bone.name === nodeName ) {

							return bone;

						}

					}

					return null;

				};

				var bone = searchSkeleton( root.skeleton );

				if ( bone ) {

					return bone;

				}

			}

			// search into node subtree.
			if ( root.children ) {

				var searchNodeSubtree = function ( children ) {

					for ( var i = 0; i < children.length; i ++ ) {

						var childNode = children[ i ];

						if ( childNode.name === nodeName || childNode.uuid === nodeName ) {

							return childNode;

						}

						var result = searchNodeSubtree( childNode.children );

						if ( result ) return result;

					}

					return null;

				};

				var subTreeNode = searchNodeSubtree( root.children );

				if ( subTreeNode ) {

					return subTreeNode;

				}

			}

			return null;

		}

	} );

	Object.assign( PropertyBinding.prototype, { // prototype, continued

		// these are used to "bind" a nonexistent property
		_getValue_unavailable: function () {},
		_setValue_unavailable: function () {},

		BindingType: {
			Direct: 0,
			EntireArray: 1,
			ArrayElement: 2,
			HasFromToArray: 3
		},

		Versioning: {
			None: 0,
			NeedsUpdate: 1,
			MatrixWorldNeedsUpdate: 2
		},

		GetterByBindingType: [

			function getValue_direct( buffer, offset ) {

				buffer[ offset ] = this.node[ this.propertyName ];

			},

			function getValue_array( buffer, offset ) {

				var source = this.resolvedProperty;

				for ( var i = 0, n = source.length; i !== n; ++ i ) {

					buffer[ offset ++ ] = source[ i ];

				}

			},

			function getValue_arrayElement( buffer, offset ) {

				buffer[ offset ] = this.resolvedProperty[ this.propertyIndex ];

			},

			function getValue_toArray( buffer, offset ) {

				this.resolvedProperty.toArray( buffer, offset );

			}

		],

		SetterByBindingTypeAndVersioning: [

			[
				// Direct

				function setValue_direct( buffer, offset ) {

					this.targetObject[ this.propertyName ] = buffer[ offset ];

				},

				function setValue_direct_setNeedsUpdate( buffer, offset ) {

					this.targetObject[ this.propertyName ] = buffer[ offset ];
					this.targetObject.needsUpdate = true;

				},

				function setValue_direct_setMatrixWorldNeedsUpdate( buffer, offset ) {

					this.targetObject[ this.propertyName ] = buffer[ offset ];
					this.targetObject.matrixWorldNeedsUpdate = true;

				}

			], [

				// EntireArray

				function setValue_array( buffer, offset ) {

					var dest = this.resolvedProperty;

					for ( var i = 0, n = dest.length; i !== n; ++ i ) {

						dest[ i ] = buffer[ offset ++ ];

					}

				},

				function setValue_array_setNeedsUpdate( buffer, offset ) {

					var dest = this.resolvedProperty;

					for ( var i = 0, n = dest.length; i !== n; ++ i ) {

						dest[ i ] = buffer[ offset ++ ];

					}

					this.targetObject.needsUpdate = true;

				},

				function setValue_array_setMatrixWorldNeedsUpdate( buffer, offset ) {

					var dest = this.resolvedProperty;

					for ( var i = 0, n = dest.length; i !== n; ++ i ) {

						dest[ i ] = buffer[ offset ++ ];

					}

					this.targetObject.matrixWorldNeedsUpdate = true;

				}

			], [

				// ArrayElement

				function setValue_arrayElement( buffer, offset ) {

					this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];

				},

				function setValue_arrayElement_setNeedsUpdate( buffer, offset ) {

					this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
					this.targetObject.needsUpdate = true;

				},

				function setValue_arrayElement_setMatrixWorldNeedsUpdate( buffer, offset ) {

					this.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];
					this.targetObject.matrixWorldNeedsUpdate = true;

				}

			], [

				// HasToFromArray

				function setValue_fromArray( buffer, offset ) {

					this.resolvedProperty.fromArray( buffer, offset );

				},

				function setValue_fromArray_setNeedsUpdate( buffer, offset ) {

					this.resolvedProperty.fromArray( buffer, offset );
					this.targetObject.needsUpdate = true;

				},

				function setValue_fromArray_setMatrixWorldNeedsUpdate( buffer, offset ) {

					this.resolvedProperty.fromArray( buffer, offset );
					this.targetObject.matrixWorldNeedsUpdate = true;

				}

			]

		],

		getValue: function getValue_unbound( targetArray, offset ) {

			this.bind();
			this.getValue( targetArray, offset );

			// Note: This class uses a State pattern on a per-method basis:
			// 'bind' sets 'this.getValue' / 'setValue' and shadows the
			// prototype version of these methods with one that represents
			// the bound state. When the property is not found, the methods
			// become no-ops.

		},

		setValue: function getValue_unbound( sourceArray, offset ) {

			this.bind();
			this.setValue( sourceArray, offset );

		},

		// create getter / setter pair for a property in the scene graph
		bind: function () {

			var targetObject = this.node,
				parsedPath = this.parsedPath,

				objectName = parsedPath.objectName,
				propertyName = parsedPath.propertyName,
				propertyIndex = parsedPath.propertyIndex;

			if ( ! targetObject ) {

				targetObject = PropertyBinding.findNode( this.rootNode, parsedPath.nodeName ) || this.rootNode;

				this.node = targetObject;

			}

			// set fail state so we can just 'return' on error
			this.getValue = this._getValue_unavailable;
			this.setValue = this._setValue_unavailable;

			// ensure there is a value node
			if ( ! targetObject ) {

				console.error( 'THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\'t found.' );
				return;

			}

			if ( objectName ) {

				var objectIndex = parsedPath.objectIndex;

				// special cases were we need to reach deeper into the hierarchy to get the face materials....
				switch ( objectName ) {

					case 'materials':

						if ( ! targetObject.material ) {

							console.error( 'THREE.PropertyBinding: Can not bind to material as node does not have a material.', this );
							return;

						}

						if ( ! targetObject.material.materials ) {

							console.error( 'THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this );
							return;

						}

						targetObject = targetObject.material.materials;

						break;

					case 'bones':

						if ( ! targetObject.skeleton ) {

							console.error( 'THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this );
							return;

						}

						// potential future optimization: skip this if propertyIndex is already an integer
						// and convert the integer string to a true integer.

						targetObject = targetObject.skeleton.bones;

						// support resolving morphTarget names into indices.
						for ( var i = 0; i < targetObject.length; i ++ ) {

							if ( targetObject[ i ].name === objectIndex ) {

								objectIndex = i;
								break;

							}

						}

						break;

					default:

						if ( targetObject[ objectName ] === undefined ) {

							console.error( 'THREE.PropertyBinding: Can not bind to objectName of node undefined.', this );
							return;

						}

						targetObject = targetObject[ objectName ];

				}


				if ( objectIndex !== undefined ) {

					if ( targetObject[ objectIndex ] === undefined ) {

						console.error( 'THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject );
						return;

					}

					targetObject = targetObject[ objectIndex ];

				}

			}

			// resolve property
			var nodeProperty = targetObject[ propertyName ];

			if ( nodeProperty === undefined ) {

				var nodeName = parsedPath.nodeName;

				console.error( 'THREE.PropertyBinding: Trying to update property for track: ' + nodeName +
					'.' + propertyName + ' but it wasn\'t found.', targetObject );
				return;

			}

			// determine versioning scheme
			var versioning = this.Versioning.None;

			if ( targetObject.needsUpdate !== undefined ) { // material

				versioning = this.Versioning.NeedsUpdate;
				this.targetObject = targetObject;

			} else if ( targetObject.matrixWorldNeedsUpdate !== undefined ) { // node transform

				versioning = this.Versioning.MatrixWorldNeedsUpdate;
				this.targetObject = targetObject;

			}

			// determine how the property gets bound
			var bindingType = this.BindingType.Direct;

			if ( propertyIndex !== undefined ) {

				// access a sub element of the property array (only primitives are supported right now)

				if ( propertyName === "morphTargetInfluences" ) {

					// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.

					// support resolving morphTarget names into indices.
					if ( ! targetObject.geometry ) {

						console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this );
						return;

					}

					if ( targetObject.geometry.isBufferGeometry ) {

						if ( ! targetObject.geometry.morphAttributes ) {

							console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this );
							return;

						}

						for ( var i = 0; i < this.node.geometry.morphAttributes.position.length; i ++ ) {

							if ( targetObject.geometry.morphAttributes.position[ i ].name === propertyIndex ) {

								propertyIndex = i;
								break;

							}

						}


					} else {

						if ( ! targetObject.geometry.morphTargets ) {

							console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphTargets.', this );
							return;

						}

						for ( var i = 0; i < this.node.geometry.morphTargets.length; i ++ ) {

							if ( targetObject.geometry.morphTargets[ i ].name === propertyIndex ) {

								propertyIndex = i;
								break;

							}

						}

					}

				}

				bindingType = this.BindingType.ArrayElement;

				this.resolvedProperty = nodeProperty;
				this.propertyIndex = propertyIndex;

			} else if ( nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined ) {

				// must use copy for Object3D.Euler/Quaternion

				bindingType = this.BindingType.HasFromToArray;

				this.resolvedProperty = nodeProperty;

			} else if ( Array.isArray( nodeProperty ) ) {

				bindingType = this.BindingType.EntireArray;

				this.resolvedProperty = nodeProperty;

			} else {

				this.propertyName = propertyName;

			}

			// select getter / setter
			this.getValue = this.GetterByBindingType[ bindingType ];
			this.setValue = this.SetterByBindingTypeAndVersioning[ bindingType ][ versioning ];

		},

		unbind: function () {

			this.node = null;

			// back to the prototype version of getValue / setValue
			// note: avoiding to mutate the shape of 'this' via 'delete'
			this.getValue = this._getValue_unbound;
			this.setValue = this._setValue_unbound;

		}

	} );

	//!\ DECLARE ALIAS AFTER assign prototype !
	Object.assign( PropertyBinding.prototype, {

		// initial state of these methods that calls 'bind'
		_getValue_unbound: PropertyBinding.prototype.getValue,
		_setValue_unbound: PropertyBinding.prototype.setValue,

	} );

	/**
	 *
	 * Buffered scene graph property that allows weighted accumulation.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function PropertyMixer( binding, typeName, valueSize ) {

		this.binding = binding;
		this.valueSize = valueSize;

		var bufferType = Float64Array,
			mixFunction;

		switch ( typeName ) {

			case 'quaternion':
				mixFunction = this._slerp;
				break;

			case 'string':
			case 'bool':
				bufferType = Array;
				mixFunction = this._select;
				break;

			default:
				mixFunction = this._lerp;

		}

		this.buffer = new bufferType( valueSize * 4 );
		// layout: [ incoming | accu0 | accu1 | orig ]
		//
		// interpolators can use .buffer as their .result
		// the data then goes to 'incoming'
		//
		// 'accu0' and 'accu1' are used frame-interleaved for
		// the cumulative result and are compared to detect
		// changes
		//
		// 'orig' stores the original state of the property

		this._mixBufferRegion = mixFunction;

		this.cumulativeWeight = 0;

		this.useCount = 0;
		this.referenceCount = 0;

	}

	Object.assign( PropertyMixer.prototype, {

		// accumulate data in the 'incoming' region into 'accu<i>'
		accumulate: function ( accuIndex, weight ) {

			// note: happily accumulating nothing when weight = 0, the caller knows
			// the weight and shouldn't have made the call in the first place

			var buffer = this.buffer,
				stride = this.valueSize,
				offset = accuIndex * stride + stride,

				currentWeight = this.cumulativeWeight;

			if ( currentWeight === 0 ) {

				// accuN := incoming * weight

				for ( var i = 0; i !== stride; ++ i ) {

					buffer[ offset + i ] = buffer[ i ];

				}

				currentWeight = weight;

			} else {

				// accuN := accuN + incoming * weight

				currentWeight += weight;
				var mix = weight / currentWeight;
				this._mixBufferRegion( buffer, offset, 0, mix, stride );

			}

			this.cumulativeWeight = currentWeight;

		},

		// apply the state of 'accu<i>' to the binding when accus differ
		apply: function ( accuIndex ) {

			var stride = this.valueSize,
				buffer = this.buffer,
				offset = accuIndex * stride + stride,

				weight = this.cumulativeWeight,

				binding = this.binding;

			this.cumulativeWeight = 0;

			if ( weight < 1 ) {

				// accuN := accuN + original * ( 1 - cumulativeWeight )

				var originalValueOffset = stride * 3;

				this._mixBufferRegion(
					buffer, offset, originalValueOffset, 1 - weight, stride );

			}

			for ( var i = stride, e = stride + stride; i !== e; ++ i ) {

				if ( buffer[ i ] !== buffer[ i + stride ] ) {

					// value has changed -> update scene graph

					binding.setValue( buffer, offset );
					break;

				}

			}

		},

		// remember the state of the bound property and copy it to both accus
		saveOriginalState: function () {

			var binding = this.binding;

			var buffer = this.buffer,
				stride = this.valueSize,

				originalValueOffset = stride * 3;

			binding.getValue( buffer, originalValueOffset );

			// accu[0..1] := orig -- initially detect changes against the original
			for ( var i = stride, e = originalValueOffset; i !== e; ++ i ) {

				buffer[ i ] = buffer[ originalValueOffset + ( i % stride ) ];

			}

			this.cumulativeWeight = 0;

		},

		// apply the state previously taken via 'saveOriginalState' to the binding
		restoreOriginalState: function () {

			var originalValueOffset = this.valueSize * 3;
			this.binding.setValue( this.buffer, originalValueOffset );

		},


		// mix functions

		_select: function ( buffer, dstOffset, srcOffset, t, stride ) {

			if ( t >= 0.5 ) {

				for ( var i = 0; i !== stride; ++ i ) {

					buffer[ dstOffset + i ] = buffer[ srcOffset + i ];

				}

			}

		},

		_slerp: function ( buffer, dstOffset, srcOffset, t ) {

			Quaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t );

		},

		_lerp: function ( buffer, dstOffset, srcOffset, t, stride ) {

			var s = 1 - t;

			for ( var i = 0; i !== stride; ++ i ) {

				var j = dstOffset + i;

				buffer[ j ] = buffer[ j ] * s + buffer[ srcOffset + i ] * t;

			}

		}

	} );

	/**
	 * @author tschw
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 */

	var AnimationUtils = {

		// same as Array.prototype.slice, but also works on typed arrays
		arraySlice: function ( array, from, to ) {

			if ( AnimationUtils.isTypedArray( array ) ) {

				// in ios9 array.subarray(from, undefined) will return empty array
				// but array.subarray(from) or array.subarray(from, len) is correct
				return new array.constructor( array.subarray( from, to !== undefined ? to : array.length ) );

			}

			return array.slice( from, to );

		},

		// converts an array to a specific type
		convertArray: function ( array, type, forceClone ) {

			if ( ! array || // let 'undefined' and 'null' pass
					! forceClone && array.constructor === type ) return array;

			if ( typeof type.BYTES_PER_ELEMENT === 'number' ) {

				return new type( array ); // create typed array

			}

			return Array.prototype.slice.call( array ); // create Array

		},

		isTypedArray: function ( object ) {

			return ArrayBuffer.isView( object ) &&
					! ( object instanceof DataView );

		},

		// returns an array by which times and values can be sorted
		getKeyframeOrder: function ( times ) {

			function compareTime( i, j ) {

				return times[ i ] - times[ j ];

			}

			var n = times.length;
			var result = new Array( n );
			for ( var i = 0; i !== n; ++ i ) result[ i ] = i;

			result.sort( compareTime );

			return result;

		},

		// uses the array previously returned by 'getKeyframeOrder' to sort data
		sortedArray: function ( values, stride, order ) {

			var nValues = values.length;
			var result = new values.constructor( nValues );

			for ( var i = 0, dstOffset = 0; dstOffset !== nValues; ++ i ) {

				var srcOffset = order[ i ] * stride;

				for ( var j = 0; j !== stride; ++ j ) {

					result[ dstOffset ++ ] = values[ srcOffset + j ];

				}

			}

			return result;

		},

		// function for parsing AOS keyframe formats
		flattenJSON: function ( jsonKeys, times, values, valuePropertyName ) {

			var i = 1, key = jsonKeys[ 0 ];

			while ( key !== undefined && key[ valuePropertyName ] === undefined ) {

				key = jsonKeys[ i ++ ];

			}

			if ( key === undefined ) return; // no data

			var value = key[ valuePropertyName ];
			if ( value === undefined ) return; // no data

			if ( Array.isArray( value ) ) {

				do {

					value = key[ valuePropertyName ];

					if ( value !== undefined ) {

						times.push( key.time );
						values.push.apply( values, value ); // push all elements

					}

					key = jsonKeys[ i ++ ];

				} while ( key !== undefined );

			} else if ( value.toArray !== undefined ) {

				// ...assume THREE.Math-ish

				do {

					value = key[ valuePropertyName ];

					if ( value !== undefined ) {

						times.push( key.time );
						value.toArray( values, values.length );

					}

					key = jsonKeys[ i ++ ];

				} while ( key !== undefined );

			} else {

				// otherwise push as-is

				do {

					value = key[ valuePropertyName ];

					if ( value !== undefined ) {

						times.push( key.time );
						values.push( value );

					}

					key = jsonKeys[ i ++ ];

				} while ( key !== undefined );

			}

		}

	};

	/**
	 * Fast and simple cubic spline interpolant.
	 *
	 * It was derived from a Hermitian construction setting the first derivative
	 * at each sample position to the linear slope between neighboring positions
	 * over their parameter interval.
	 *
	 * @author tschw
	 */

	function CubicInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

		this._weightPrev = - 0;
		this._offsetPrev = - 0;
		this._weightNext = - 0;
		this._offsetNext = - 0;

	}

	CubicInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

		constructor: CubicInterpolant,

		DefaultSettings_: {

			endingStart: ZeroCurvatureEnding,
			endingEnd: ZeroCurvatureEnding

		},

		intervalChanged_: function ( i1, t0, t1 ) {

			var pp = this.parameterPositions,
				iPrev = i1 - 2,
				iNext = i1 + 1,

				tPrev = pp[ iPrev ],
				tNext = pp[ iNext ];

			if ( tPrev === undefined ) {

				switch ( this.getSettings_().endingStart ) {

					case ZeroSlopeEnding:

						// f'(t0) = 0
						iPrev = i1;
						tPrev = 2 * t0 - t1;

						break;

					case WrapAroundEnding:

						// use the other end of the curve
						iPrev = pp.length - 2;
						tPrev = t0 + pp[ iPrev ] - pp[ iPrev + 1 ];

						break;

					default: // ZeroCurvatureEnding

						// f''(t0) = 0 a.k.a. Natural Spline
						iPrev = i1;
						tPrev = t1;

				}

			}

			if ( tNext === undefined ) {

				switch ( this.getSettings_().endingEnd ) {

					case ZeroSlopeEnding:

						// f'(tN) = 0
						iNext = i1;
						tNext = 2 * t1 - t0;

						break;

					case WrapAroundEnding:

						// use the other end of the curve
						iNext = 1;
						tNext = t1 + pp[ 1 ] - pp[ 0 ];

						break;

					default: // ZeroCurvatureEnding

						// f''(tN) = 0, a.k.a. Natural Spline
						iNext = i1 - 1;
						tNext = t0;

				}

			}

			var halfDt = ( t1 - t0 ) * 0.5,
				stride = this.valueSize;

			this._weightPrev = halfDt / ( t0 - tPrev );
			this._weightNext = halfDt / ( tNext - t1 );
			this._offsetPrev = iPrev * stride;
			this._offsetNext = iNext * stride;

		},

		interpolate_: function ( i1, t0, t, t1 ) {

			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,

				o1 = i1 * stride,		o0 = o1 - stride,
				oP = this._offsetPrev, 	oN = this._offsetNext,
				wP = this._weightPrev,	wN = this._weightNext,

				p = ( t - t0 ) / ( t1 - t0 ),
				pp = p * p,
				ppp = pp * p;

			// evaluate polynomials

			var sP = - wP * ppp + 2 * wP * pp - wP * p;
			var s0 = ( 1 + wP ) * ppp + ( - 1.5 - 2 * wP ) * pp + ( - 0.5 + wP ) * p + 1;
			var s1 = ( - 1 - wN ) * ppp + ( 1.5 + wN ) * pp + 0.5 * p;
			var sN = wN * ppp - wN * pp;

			// combine data linearly

			for ( var i = 0; i !== stride; ++ i ) {

				result[ i ] =
						sP * values[ oP + i ] +
						s0 * values[ o0 + i ] +
						s1 * values[ o1 + i ] +
						sN * values[ oN + i ];

			}

			return result;

		}

	} );

	/**
	 *
	 * Interpolant that evaluates to the sample value at the position preceeding
	 * the parameter.
	 *
	 * @author tschw
	 */

	function DiscreteInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

	}

	DiscreteInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

		constructor: DiscreteInterpolant,

		interpolate_: function ( i1 /*, t0, t, t1 */ ) {

			return this.copySampleValue_( i1 - 1 );

		}

	} );

	var KeyframeTrackPrototype;

	KeyframeTrackPrototype = {

		TimeBufferType: Float32Array,
		ValueBufferType: Float32Array,

		DefaultInterpolation: InterpolateLinear,

		InterpolantFactoryMethodDiscrete: function ( result ) {

			return new DiscreteInterpolant( this.times, this.values, this.getValueSize(), result );

		},

		InterpolantFactoryMethodLinear: function ( result ) {

			return new LinearInterpolant( this.times, this.values, this.getValueSize(), result );

		},

		InterpolantFactoryMethodSmooth: function ( result ) {

			return new CubicInterpolant( this.times, this.values, this.getValueSize(), result );

		},

		setInterpolation: function ( interpolation ) {

			var factoryMethod;

			switch ( interpolation ) {

				case InterpolateDiscrete:

					factoryMethod = this.InterpolantFactoryMethodDiscrete;

					break;

				case InterpolateLinear:

					factoryMethod = this.InterpolantFactoryMethodLinear;

					break;

				case InterpolateSmooth:

					factoryMethod = this.InterpolantFactoryMethodSmooth;

					break;

			}

			if ( factoryMethod === undefined ) {

				var message = "unsupported interpolation for " +
						this.ValueTypeName + " keyframe track named " + this.name;

				if ( this.createInterpolant === undefined ) {

					// fall back to default, unless the default itself is messed up
					if ( interpolation !== this.DefaultInterpolation ) {

						this.setInterpolation( this.DefaultInterpolation );

					} else {

						throw new Error( message ); // fatal, in this case

					}

				}

				console.warn( 'THREE.KeyframeTrackPrototype:', message );
				return;

			}

			this.createInterpolant = factoryMethod;

		},

		getInterpolation: function () {

			switch ( this.createInterpolant ) {

				case this.InterpolantFactoryMethodDiscrete:

					return InterpolateDiscrete;

				case this.InterpolantFactoryMethodLinear:

					return InterpolateLinear;

				case this.InterpolantFactoryMethodSmooth:

					return InterpolateSmooth;

			}

		},

		getValueSize: function () {

			return this.values.length / this.times.length;

		},

		// move all keyframes either forwards or backwards in time
		shift: function ( timeOffset ) {

			if ( timeOffset !== 0.0 ) {

				var times = this.times;

				for ( var i = 0, n = times.length; i !== n; ++ i ) {

					times[ i ] += timeOffset;

				}

			}

			return this;

		},

		// scale all keyframe times by a factor (useful for frame <-> seconds conversions)
		scale: function ( timeScale ) {

			if ( timeScale !== 1.0 ) {

				var times = this.times;

				for ( var i = 0, n = times.length; i !== n; ++ i ) {

					times[ i ] *= timeScale;

				}

			}

			return this;

		},

		// removes keyframes before and after animation without changing any values within the range [startTime, endTime].
		// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values
		trim: function ( startTime, endTime ) {

			var times = this.times,
				nKeys = times.length,
				from = 0,
				to = nKeys - 1;

			while ( from !== nKeys && times[ from ] < startTime ) ++ from;
			while ( to !== - 1 && times[ to ] > endTime ) -- to;

			++ to; // inclusive -> exclusive bound

			if ( from !== 0 || to !== nKeys ) {

				// empty tracks are forbidden, so keep at least one keyframe
				if ( from >= to ) to = Math.max( to, 1 ), from = to - 1;

				var stride = this.getValueSize();
				this.times = AnimationUtils.arraySlice( times, from, to );
				this.values = AnimationUtils.arraySlice( this.values, from * stride, to * stride );

			}

			return this;

		},

		// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable
		validate: function () {

			var valid = true;

			var valueSize = this.getValueSize();
			if ( valueSize - Math.floor( valueSize ) !== 0 ) {

				console.error( 'THREE.KeyframeTrackPrototype: Invalid value size in track.', this );
				valid = false;

			}

			var times = this.times,
				values = this.values,

				nKeys = times.length;

			if ( nKeys === 0 ) {

				console.error( 'THREE.KeyframeTrackPrototype: Track is empty.', this );
				valid = false;

			}

			var prevTime = null;

			for ( var i = 0; i !== nKeys; i ++ ) {

				var currTime = times[ i ];

				if ( typeof currTime === 'number' && isNaN( currTime ) ) {

					console.error( 'THREE.KeyframeTrackPrototype: Time is not a valid number.', this, i, currTime );
					valid = false;
					break;

				}

				if ( prevTime !== null && prevTime > currTime ) {

					console.error( 'THREE.KeyframeTrackPrototype: Out of order keys.', this, i, currTime, prevTime );
					valid = false;
					break;

				}

				prevTime = currTime;

			}

			if ( values !== undefined ) {

				if ( AnimationUtils.isTypedArray( values ) ) {

					for ( var i = 0, n = values.length; i !== n; ++ i ) {

						var value = values[ i ];

						if ( isNaN( value ) ) {

							console.error( 'THREE.KeyframeTrackPrototype: Value is not a valid number.', this, i, value );
							valid = false;
							break;

						}

					}

				}

			}

			return valid;

		},

		// removes equivalent sequential keys as common in morph target sequences
		// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)
		optimize: function () {

			var times = this.times,
				values = this.values,
				stride = this.getValueSize(),

				smoothInterpolation = this.getInterpolation() === InterpolateSmooth,

				writeIndex = 1,
				lastIndex = times.length - 1;

			for ( var i = 1; i < lastIndex; ++ i ) {

				var keep = false;

				var time = times[ i ];
				var timeNext = times[ i + 1 ];

				// remove adjacent keyframes scheduled at the same time

				if ( time !== timeNext && ( i !== 1 || time !== time[ 0 ] ) ) {

					if ( ! smoothInterpolation ) {

						// remove unnecessary keyframes same as their neighbors

						var offset = i * stride,
							offsetP = offset - stride,
							offsetN = offset + stride;

						for ( var j = 0; j !== stride; ++ j ) {

							var value = values[ offset + j ];

							if ( value !== values[ offsetP + j ] ||
									value !== values[ offsetN + j ] ) {

								keep = true;
								break;

							}

						}

					} else keep = true;

				}

				// in-place compaction

				if ( keep ) {

					if ( i !== writeIndex ) {

						times[ writeIndex ] = times[ i ];

						var readOffset = i * stride,
							writeOffset = writeIndex * stride;

						for ( var j = 0; j !== stride; ++ j )

							values[ writeOffset + j ] = values[ readOffset + j ];

					}

					++ writeIndex;

				}

			}

			// flush last keyframe (compaction looks ahead)

			if ( lastIndex > 0 ) {

				times[ writeIndex ] = times[ lastIndex ];

				for ( var readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++ j )

					values[ writeOffset + j ] = values[ readOffset + j ];

				++ writeIndex;

			}

			if ( writeIndex !== times.length ) {

				this.times = AnimationUtils.arraySlice( times, 0, writeIndex );
				this.values = AnimationUtils.arraySlice( values, 0, writeIndex * stride );

			}

			return this;

		}

	};

	function KeyframeTrackConstructor( name, times, values, interpolation ) {

		if ( name === undefined ) throw new Error( 'track name is undefined' );

		if ( times === undefined || times.length === 0 ) {

			throw new Error( 'no keyframes in track named ' + name );

		}

		this.name = name;

		this.times = AnimationUtils.convertArray( times, this.TimeBufferType );
		this.values = AnimationUtils.convertArray( values, this.ValueBufferType );

		this.setInterpolation( interpolation || this.DefaultInterpolation );

		this.validate();
		this.optimize();

	}

	/**
	 *
	 * A Track of vectored keyframe values.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function VectorKeyframeTrack( name, times, values, interpolation ) {

		KeyframeTrackConstructor.call( this, name, times, values, interpolation );

	}

	VectorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrackPrototype ), {

		constructor: VectorKeyframeTrack,

		ValueTypeName: 'vector'

		// ValueBufferType is inherited

		// DefaultInterpolation is inherited

	} );

	/**
	 * Spherical linear unit quaternion interpolant.
	 *
	 * @author tschw
	 */

	function QuaternionLinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

		Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

	}

	QuaternionLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {

		constructor: QuaternionLinearInterpolant,

		interpolate_: function ( i1, t0, t, t1 ) {

			var result = this.resultBuffer,
				values = this.sampleValues,
				stride = this.valueSize,

				offset = i1 * stride,

				alpha = ( t - t0 ) / ( t1 - t0 );

			for ( var end = offset + stride; offset !== end; offset += 4 ) {

				Quaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );

			}

			return result;

		}

	} );

	/**
	 *
	 * A Track of quaternion keyframe values.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function QuaternionKeyframeTrack( name, times, values, interpolation ) {

		KeyframeTrackConstructor.call( this, name, times, values, interpolation );

	}

	QuaternionKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrackPrototype ), {

		constructor: QuaternionKeyframeTrack,

		ValueTypeName: 'quaternion',

		// ValueBufferType is inherited

		DefaultInterpolation: InterpolateLinear,

		InterpolantFactoryMethodLinear: function ( result ) {

			return new QuaternionLinearInterpolant( this.times, this.values, this.getValueSize(), result );

		},

		InterpolantFactoryMethodSmooth: undefined // not yet implemented

	} );

	/**
	 *
	 * A Track of numeric keyframe values.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function NumberKeyframeTrack( name, times, values, interpolation ) {

		KeyframeTrackConstructor.call( this, name, times, values, interpolation );

	}

	NumberKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrackPrototype ), {

		constructor: NumberKeyframeTrack,

		ValueTypeName: 'number'

		// ValueBufferType is inherited

		// DefaultInterpolation is inherited

	} );

	/**
	 *
	 * A Track that interpolates Strings
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function StringKeyframeTrack( name, times, values, interpolation ) {

		KeyframeTrackConstructor.call( this, name, times, values, interpolation );

	}

	StringKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrackPrototype ), {

		constructor: StringKeyframeTrack,

		ValueTypeName: 'string',
		ValueBufferType: Array,

		DefaultInterpolation: InterpolateDiscrete,

		InterpolantFactoryMethodLinear: undefined,

		InterpolantFactoryMethodSmooth: undefined

	} );

	/**
	 *
	 * A Track of Boolean keyframe values.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function BooleanKeyframeTrack( name, times, values ) {

		KeyframeTrackConstructor.call( this, name, times, values );

	}

	BooleanKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrackPrototype ), {

		constructor: BooleanKeyframeTrack,

		ValueTypeName: 'bool',
		ValueBufferType: Array,

		DefaultInterpolation: InterpolateDiscrete,

		InterpolantFactoryMethodLinear: undefined,
		InterpolantFactoryMethodSmooth: undefined

		// Note: Actually this track could have a optimized / compressed
		// representation of a single value and a custom interpolant that
		// computes "firstValue ^ isOdd( index )".

	} );

	/**
	 *
	 * A Track of keyframe values that represent color.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function ColorKeyframeTrack( name, times, values, interpolation ) {

		KeyframeTrackConstructor.call( this, name, times, values, interpolation );

	}

	ColorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrackPrototype ), {

		constructor: ColorKeyframeTrack,

		ValueTypeName: 'color'

		// ValueBufferType is inherited

		// DefaultInterpolation is inherited


		// Note: Very basic implementation and nothing special yet.
		// However, this is the place for color space parameterization.

	} );

	/**
	 *
	 * A timed sequence of keyframes for a specific property.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function KeyframeTrack( name, times, values, interpolation ) {

		KeyframeTrackConstructor.apply( this, name, times, values, interpolation );

	}

	KeyframeTrack.prototype = KeyframeTrackPrototype;
	KeyframeTrackPrototype.constructor = KeyframeTrack;

	// Static methods:

	Object.assign( KeyframeTrack, {

		// Serialization (in static context, because of constructor invocation
		// and automatic invocation of .toJSON):

		parse: function ( json ) {

			if ( json.type === undefined ) {

				throw new Error( 'track type undefined, can not parse' );

			}

			var trackType = KeyframeTrack._getTrackTypeForValueTypeName( json.type );

			if ( json.times === undefined ) {

				var times = [], values = [];

				AnimationUtils.flattenJSON( json.keys, times, values, 'value' );

				json.times = times;
				json.values = values;

			}

			// derived classes can define a static parse method
			if ( trackType.parse !== undefined ) {

				return trackType.parse( json );

			} else {

				// by default, we assume a constructor compatible with the base
				return new trackType( json.name, json.times, json.values, json.interpolation );

			}

		},

		toJSON: function ( track ) {

			var trackType = track.constructor;

			var json;

			// derived classes can define a static toJSON method
			if ( trackType.toJSON !== undefined ) {

				json = trackType.toJSON( track );

			} else {

				// by default, we assume the data can be serialized as-is
				json = {

					'name': track.name,
					'times': AnimationUtils.convertArray( track.times, Array ),
					'values': AnimationUtils.convertArray( track.values, Array )

				};

				var interpolation = track.getInterpolation();

				if ( interpolation !== track.DefaultInterpolation ) {

					json.interpolation = interpolation;

				}

			}

			json.type = track.ValueTypeName; // mandatory

			return json;

		},

		_getTrackTypeForValueTypeName: function ( typeName ) {

			switch ( typeName.toLowerCase() ) {

				case 'scalar':
				case 'double':
				case 'float':
				case 'number':
				case 'integer':

					return NumberKeyframeTrack;

				case 'vector':
				case 'vector2':
				case 'vector3':
				case 'vector4':

					return VectorKeyframeTrack;

				case 'color':

					return ColorKeyframeTrack;

				case 'quaternion':

					return QuaternionKeyframeTrack;

				case 'bool':
				case 'boolean':

					return BooleanKeyframeTrack;

				case 'string':

					return StringKeyframeTrack;

			}

			throw new Error( 'Unsupported typeName: ' + typeName );

		}

	} );

	/**
	 *
	 * Reusable set of Tracks that represent an animation.
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 */

	function AnimationClip( name, duration, tracks ) {

		this.name = name;
		this.tracks = tracks;
		this.duration = ( duration !== undefined ) ? duration : - 1;

		this.uuid = _Math.generateUUID();

		// this means it should figure out its duration by scanning the tracks
		if ( this.duration < 0 ) {

			this.resetDuration();

		}

		this.optimize();

	}

	Object.assign( AnimationClip, {

		parse: function ( json ) {

			var tracks = [],
				jsonTracks = json.tracks,
				frameTime = 1.0 / ( json.fps || 1.0 );

			for ( var i = 0, n = jsonTracks.length; i !== n; ++ i ) {

				tracks.push( KeyframeTrack.parse( jsonTracks[ i ] ).scale( frameTime ) );

			}

			return new AnimationClip( json.name, json.duration, tracks );

		},

		toJSON: function ( clip ) {

			var tracks = [],
				clipTracks = clip.tracks;

			var json = {

				'name': clip.name,
				'duration': clip.duration,
				'tracks': tracks

			};

			for ( var i = 0, n = clipTracks.length; i !== n; ++ i ) {

				tracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );

			}

			return json;

		},

		CreateFromMorphTargetSequence: function ( name, morphTargetSequence, fps, noLoop ) {

			var numMorphTargets = morphTargetSequence.length;
			var tracks = [];

			for ( var i = 0; i < numMorphTargets; i ++ ) {

				var times = [];
				var values = [];

				times.push(
					( i + numMorphTargets - 1 ) % numMorphTargets,
					i,
					( i + 1 ) % numMorphTargets );

				values.push( 0, 1, 0 );

				var order = AnimationUtils.getKeyframeOrder( times );
				times = AnimationUtils.sortedArray( times, 1, order );
				values = AnimationUtils.sortedArray( values, 1, order );

				// if there is a key at the first frame, duplicate it as the
				// last frame as well for perfect loop.
				if ( ! noLoop && times[ 0 ] === 0 ) {

					times.push( numMorphTargets );
					values.push( values[ 0 ] );

				}

				tracks.push(
					new NumberKeyframeTrack(
						'.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',
						times, values
					).scale( 1.0 / fps ) );

			}

			return new AnimationClip( name, - 1, tracks );

		},

		findByName: function ( objectOrClipArray, name ) {

			var clipArray = objectOrClipArray;

			if ( ! Array.isArray( objectOrClipArray ) ) {

				var o = objectOrClipArray;
				clipArray = o.geometry && o.geometry.animations || o.animations;

			}

			for ( var i = 0; i < clipArray.length; i ++ ) {

				if ( clipArray[ i ].name === name ) {

					return clipArray[ i ];

				}

			}

			return null;

		},

		CreateClipsFromMorphTargetSequences: function ( morphTargets, fps, noLoop ) {

			var animationToMorphTargets = {};

			// tested with https://regex101.com/ on trick sequences
			// such flamingo_flyA_003, flamingo_run1_003, crdeath0059
			var pattern = /^([\w-]*?)([\d]+)$/;

			// sort morph target names into animation groups based
			// patterns like Walk_001, Walk_002, Run_001, Run_002
			for ( var i = 0, il = morphTargets.length; i < il; i ++ ) {

				var morphTarget = morphTargets[ i ];
				var parts = morphTarget.name.match( pattern );

				if ( parts && parts.length > 1 ) {

					var name = parts[ 1 ];

					var animationMorphTargets = animationToMorphTargets[ name ];
					if ( ! animationMorphTargets ) {

						animationToMorphTargets[ name ] = animationMorphTargets = [];

					}

					animationMorphTargets.push( morphTarget );

				}

			}

			var clips = [];

			for ( var name in animationToMorphTargets ) {

				clips.push( AnimationClip.CreateFromMorphTargetSequence( name, animationToMorphTargets[ name ], fps, noLoop ) );

			}

			return clips;

		},

		// parse the animation.hierarchy format
		parseAnimation: function ( animation, bones ) {

			if ( ! animation ) {

				console.error( 'THREE.AnimationClip: No animation in JSONLoader data.' );
				return null;

			}

			var addNonemptyTrack = function ( trackType, trackName, animationKeys, propertyName, destTracks ) {

				// only return track if there are actually keys.
				if ( animationKeys.length !== 0 ) {

					var times = [];
					var values = [];

					AnimationUtils.flattenJSON( animationKeys, times, values, propertyName );

					// empty keys are filtered out, so check again
					if ( times.length !== 0 ) {

						destTracks.push( new trackType( trackName, times, values ) );

					}

				}

			};

			var tracks = [];

			var clipName = animation.name || 'default';
			// automatic length determination in AnimationClip.
			var duration = animation.length || - 1;
			var fps = animation.fps || 30;

			var hierarchyTracks = animation.hierarchy || [];

			for ( var h = 0; h < hierarchyTracks.length; h ++ ) {

				var animationKeys = hierarchyTracks[ h ].keys;

				// skip empty tracks
				if ( ! animationKeys || animationKeys.length === 0 ) continue;

				// process morph targets
				if ( animationKeys[ 0 ].morphTargets ) {

					// figure out all morph targets used in this track
					var morphTargetNames = {};

					for ( var k = 0; k < animationKeys.length; k ++ ) {

						if ( animationKeys[ k ].morphTargets ) {

							for ( var m = 0; m < animationKeys[ k ].morphTargets.length; m ++ ) {

								morphTargetNames[ animationKeys[ k ].morphTargets[ m ] ] = - 1;

							}

						}

					}

					// create a track for each morph target with all zero
					// morphTargetInfluences except for the keys in which
					// the morphTarget is named.
					for ( var morphTargetName in morphTargetNames ) {

						var times = [];
						var values = [];

						for ( var m = 0; m !== animationKeys[ k ].morphTargets.length; ++ m ) {

							var animationKey = animationKeys[ k ];

							times.push( animationKey.time );
							values.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );

						}

						tracks.push( new NumberKeyframeTrack( '.morphTargetInfluence[' + morphTargetName + ']', times, values ) );

					}

					duration = morphTargetNames.length * ( fps || 1.0 );

				} else {

					// ...assume skeletal animation

					var boneName = '.bones[' + bones[ h ].name + ']';

					addNonemptyTrack(
						VectorKeyframeTrack, boneName + '.position',
						animationKeys, 'pos', tracks );

					addNonemptyTrack(
						QuaternionKeyframeTrack, boneName + '.quaternion',
						animationKeys, 'rot', tracks );

					addNonemptyTrack(
						VectorKeyframeTrack, boneName + '.scale',
						animationKeys, 'scl', tracks );

				}

			}

			if ( tracks.length === 0 ) {

				return null;

			}

			var clip = new AnimationClip( clipName, duration, tracks );

			return clip;

		}

	} );

	Object.assign( AnimationClip.prototype, {

		resetDuration: function () {

			var tracks = this.tracks, duration = 0;

			for ( var i = 0, n = tracks.length; i !== n; ++ i ) {

				var track = this.tracks[ i ];

				duration = Math.max( duration, track.times[ track.times.length - 1 ] );

			}

			this.duration = duration;

		},

		trim: function () {

			for ( var i = 0; i < this.tracks.length; i ++ ) {

				this.tracks[ i ].trim( 0, this.duration );

			}

			return this;

		},

		optimize: function () {

			for ( var i = 0; i < this.tracks.length; i ++ ) {

				this.tracks[ i ].optimize();

			}

			return this;

		}

	} );

	/**
	 *
	 * Player for AnimationClips.
	 *
	 *
	 * @author Ben Houston / http://clara.io/
	 * @author David Sarno / http://lighthaus.us/
	 * @author tschw
	 */

	function AnimationMixer( root ) {

		this._root = root;
		this._initMemoryManager();
		this._accuIndex = 0;

		this.time = 0;

		this.timeScale = 1.0;

	}

	Object.assign( AnimationMixer.prototype, EventDispatcher.prototype, {

		_bindAction: function ( action, prototypeAction ) {

			var root = action._localRoot || this._root,
				tracks = action._clip.tracks,
				nTracks = tracks.length,
				bindings = action._propertyBindings,
				interpolants = action._interpolants,
				rootUuid = root.uuid,
				bindingsByRoot = this._bindingsByRootAndName,
				bindingsByName = bindingsByRoot[ rootUuid ];

			if ( bindingsByName === undefined ) {

				bindingsByName = {};
				bindingsByRoot[ rootUuid ] = bindingsByName;

			}

			for ( var i = 0; i !== nTracks; ++ i ) {

				var track = tracks[ i ],
					trackName = track.name,
					binding = bindingsByName[ trackName ];

				if ( binding !== undefined ) {

					bindings[ i ] = binding;

				} else {

					binding = bindings[ i ];

					if ( binding !== undefined ) {

						// existing binding, make sure the cache knows

						if ( binding._cacheIndex === null ) {

							++ binding.referenceCount;
							this._addInactiveBinding( binding, rootUuid, trackName );

						}

						continue;

					}

					var path = prototypeAction && prototypeAction.
						_propertyBindings[ i ].binding.parsedPath;

					binding = new PropertyMixer(
						PropertyBinding.create( root, trackName, path ),
						track.ValueTypeName, track.getValueSize() );

					++ binding.referenceCount;
					this._addInactiveBinding( binding, rootUuid, trackName );

					bindings[ i ] = binding;

				}

				interpolants[ i ].resultBuffer = binding.buffer;

			}

		},

		_activateAction: function ( action ) {

			if ( ! this._isActiveAction( action ) ) {

				if ( action._cacheIndex === null ) {

					// this action has been forgotten by the cache, but the user
					// appears to be still using it -> rebind

					var rootUuid = ( action._localRoot || this._root ).uuid,
						clipUuid = action._clip.uuid,
						actionsForClip = this._actionsByClip[ clipUuid ];

					this._bindAction( action,
						actionsForClip && actionsForClip.knownActions[ 0 ] );

					this._addInactiveAction( action, clipUuid, rootUuid );

				}

				var bindings = action._propertyBindings;

				// increment reference counts / sort out state
				for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

					var binding = bindings[ i ];

					if ( binding.useCount ++ === 0 ) {

						this._lendBinding( binding );
						binding.saveOriginalState();

					}

				}

				this._lendAction( action );

			}

		},

		_deactivateAction: function ( action ) {

			if ( this._isActiveAction( action ) ) {

				var bindings = action._propertyBindings;

				// decrement reference counts / sort out state
				for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

					var binding = bindings[ i ];

					if ( -- binding.useCount === 0 ) {

						binding.restoreOriginalState();
						this._takeBackBinding( binding );

					}

				}

				this._takeBackAction( action );

			}

		},

		// Memory manager

		_initMemoryManager: function () {

			this._actions = []; // 'nActiveActions' followed by inactive ones
			this._nActiveActions = 0;

			this._actionsByClip = {};
			// inside:
			// {
			// 		knownActions: Array< AnimationAction >	- used as prototypes
			// 		actionByRoot: AnimationAction			- lookup
			// }


			this._bindings = []; // 'nActiveBindings' followed by inactive ones
			this._nActiveBindings = 0;

			this._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >


			this._controlInterpolants = []; // same game as above
			this._nActiveControlInterpolants = 0;

			var scope = this;

			this.stats = {

				actions: {
					get total() {

						return scope._actions.length;

					},
					get inUse() {

						return scope._nActiveActions;

					}
				},
				bindings: {
					get total() {

						return scope._bindings.length;

					},
					get inUse() {

						return scope._nActiveBindings;

					}
				},
				controlInterpolants: {
					get total() {

						return scope._controlInterpolants.length;

					},
					get inUse() {

						return scope._nActiveControlInterpolants;

					}
				}

			};

		},

		// Memory management for AnimationAction objects

		_isActiveAction: function ( action ) {

			var index = action._cacheIndex;
			return index !== null && index < this._nActiveActions;

		},

		_addInactiveAction: function ( action, clipUuid, rootUuid ) {

			var actions = this._actions,
				actionsByClip = this._actionsByClip,
				actionsForClip = actionsByClip[ clipUuid ];

			if ( actionsForClip === undefined ) {

				actionsForClip = {

					knownActions: [ action ],
					actionByRoot: {}

				};

				action._byClipCacheIndex = 0;

				actionsByClip[ clipUuid ] = actionsForClip;

			} else {

				var knownActions = actionsForClip.knownActions;

				action._byClipCacheIndex = knownActions.length;
				knownActions.push( action );

			}

			action._cacheIndex = actions.length;
			actions.push( action );

			actionsForClip.actionByRoot[ rootUuid ] = action;

		},

		_removeInactiveAction: function ( action ) {

			var actions = this._actions,
				lastInactiveAction = actions[ actions.length - 1 ],
				cacheIndex = action._cacheIndex;

			lastInactiveAction._cacheIndex = cacheIndex;
			actions[ cacheIndex ] = lastInactiveAction;
			actions.pop();

			action._cacheIndex = null;


			var clipUuid = action._clip.uuid,
				actionsByClip = this._actionsByClip,
				actionsForClip = actionsByClip[ clipUuid ],
				knownActionsForClip = actionsForClip.knownActions,

				lastKnownAction =
					knownActionsForClip[ knownActionsForClip.length - 1 ],

				byClipCacheIndex = action._byClipCacheIndex;

			lastKnownAction._byClipCacheIndex = byClipCacheIndex;
			knownActionsForClip[ byClipCacheIndex ] = lastKnownAction;
			knownActionsForClip.pop();

			action._byClipCacheIndex = null;


			var actionByRoot = actionsForClip.actionByRoot,
				rootUuid = ( action._localRoot || this._root ).uuid;

			delete actionByRoot[ rootUuid ];

			if ( knownActionsForClip.length === 0 ) {

				delete actionsByClip[ clipUuid ];

			}

			this._removeInactiveBindingsForAction( action );

		},

		_removeInactiveBindingsForAction: function ( action ) {

			var bindings = action._propertyBindings;
			for ( var i = 0, n = bindings.length; i !== n; ++ i ) {

				var binding = bindings[ i ];

				if ( -- binding.referenceCount === 0 ) {

					this._removeInactiveBinding( binding );

				}

			}

		},

		_lendAction: function ( action ) {

			// [ active actions |  inactive actions  ]
			// [  active actions >| inactive actions ]
			//                 s        a
			//                  <-swap->
			//                 a        s

			var actions = this._actions,
				prevIndex = action._cacheIndex,

				lastActiveIndex = this._nActiveActions ++,

				firstInactiveAction = actions[ lastActiveIndex ];

			action._cacheIndex = lastActiveIndex;
			actions[ lastActiveIndex ] = action;

			firstInactiveAction._cacheIndex = prevIndex;
			actions[ prevIndex ] = firstInactiveAction;

		},

		_takeBackAction: function ( action ) {

			// [  active actions  | inactive actions ]
			// [ active actions |< inactive actions  ]
			//        a        s
			//         <-swap->
			//        s        a

			var actions = this._actions,
				prevIndex = action._cacheIndex,

				firstInactiveIndex = -- this._nActiveActions,

				lastActiveAction = actions[ firstInactiveIndex ];

			action._cacheIndex = firstInactiveIndex;
			actions[ firstInactiveIndex ] = action;

			lastActiveAction._cacheIndex = prevIndex;
			actions[ prevIndex ] = lastActiveAction;

		},

		// Memory management for PropertyMixer objects

		_addInactiveBinding: function ( binding, rootUuid, trackName ) {

			var bindingsByRoot = this._bindingsByRootAndName,
				bindingByName = bindingsByRoot[ rootUuid ],

				bindings = this._bindings;

			if ( bindingByName === undefined ) {

				bindingByName = {};
				bindingsByRoot[ rootUuid ] = bindingByName;

			}

			bindingByName[ trackName ] = binding;

			binding._cacheIndex = bindings.length;
			bindings.push( binding );

		},

		_removeInactiveBinding: function ( binding ) {

			var bindings = this._bindings,
				propBinding = binding.binding,
				rootUuid = propBinding.rootNode.uuid,
				trackName = propBinding.path,
				bindingsByRoot = this._bindingsByRootAndName,
				bindingByName = bindingsByRoot[ rootUuid ],

				lastInactiveBinding = bindings[ bindings.length - 1 ],
				cacheIndex = binding._cacheIndex;

			lastInactiveBinding._cacheIndex = cacheIndex;
			bindings[ cacheIndex ] = lastInactiveBinding;
			bindings.pop();

			delete bindingByName[ trackName ];

			remove_empty_map: {

				for ( var _ in bindingByName ) break remove_empty_map; // eslint-disable-line no-unused-vars

				delete bindingsByRoot[ rootUuid ];

			}

		},

		_lendBinding: function ( binding ) {

			var bindings = this._bindings,
				prevIndex = binding._cacheIndex,

				lastActiveIndex = this._nActiveBindings ++,

				firstInactiveBinding = bindings[ lastActiveIndex ];

			binding._cacheIndex = lastActiveIndex;
			bindings[ lastActiveIndex ] = binding;

			firstInactiveBinding._cacheIndex = prevIndex;
			bindings[ prevIndex ] = firstInactiveBinding;

		},

		_takeBackBinding: function ( binding ) {

			var bindings = this._bindings,
				prevIndex = binding._cacheIndex,

				firstInactiveIndex = -- this._nActiveBindings,

				lastActiveBinding = bindings[ firstInactiveIndex ];

			binding._cacheIndex = firstInactiveIndex;
			bindings[ firstInactiveIndex ] = binding;

			lastActiveBinding._cacheIndex = prevIndex;
			bindings[ prevIndex ] = lastActiveBinding;

		},


		// Memory management of Interpolants for weight and time scale

		_lendControlInterpolant: function () {

			var interpolants = this._controlInterpolants,
				lastActiveIndex = this._nActiveControlInterpolants ++,
				interpolant = interpolants[ lastActiveIndex ];

			if ( interpolant === undefined ) {

				interpolant = new LinearInterpolant(
					new Float32Array( 2 ), new Float32Array( 2 ),
					1, this._controlInterpolantsResultBuffer );

				interpolant.__cacheIndex = lastActiveIndex;
				interpolants[ lastActiveIndex ] = interpolant;

			}

			return interpolant;

		},

		_takeBackControlInterpolant: function ( interpolant ) {

			var interpolants = this._controlInterpolants,
				prevIndex = interpolant.__cacheIndex,

				firstInactiveIndex = -- this._nActiveControlInterpolants,

				lastActiveInterpolant = interpolants[ firstInactiveIndex ];

			interpolant.__cacheIndex = firstInactiveIndex;
			interpolants[ firstInactiveIndex ] = interpolant;

			lastActiveInterpolant.__cacheIndex = prevIndex;
			interpolants[ prevIndex ] = lastActiveInterpolant;

		},

		_controlInterpolantsResultBuffer: new Float32Array( 1 ),

		// return an action for a clip optionally using a custom root target
		// object (this method allocates a lot of dynamic memory in case a
		// previously unknown clip/root combination is specified)
		clipAction: function ( clip, optionalRoot ) {

			var root = optionalRoot || this._root,
				rootUuid = root.uuid,

				clipObject = typeof clip === 'string' ?
					AnimationClip.findByName( root, clip ) : clip,

				clipUuid = clipObject !== null ? clipObject.uuid : clip,

				actionsForClip = this._actionsByClip[ clipUuid ],
				prototypeAction = null;

			if ( actionsForClip !== undefined ) {

				var existingAction =
						actionsForClip.actionByRoot[ rootUuid ];

				if ( existingAction !== undefined ) {

					return existingAction;

				}

				// we know the clip, so we don't have to parse all
				// the bindings again but can just copy
				prototypeAction = actionsForClip.knownActions[ 0 ];

				// also, take the clip from the prototype action
				if ( clipObject === null )
					clipObject = prototypeAction._clip;

			}

			// clip must be known when specified via string
			if ( clipObject === null ) return null;

			// allocate all resources required to run it
			var newAction = new AnimationAction( this, clipObject, optionalRoot );

			this._bindAction( newAction, prototypeAction );

			// and make the action known to the memory manager
			this._addInactiveAction( newAction, clipUuid, rootUuid );

			return newAction;

		},

		// get an existing action
		existingAction: function ( clip, optionalRoot ) {

			var root = optionalRoot || this._root,
				rootUuid = root.uuid,

				clipObject = typeof clip === 'string' ?
					AnimationClip.findByName( root, clip ) : clip,

				clipUuid = clipObject ? clipObject.uuid : clip,

				actionsForClip = this._actionsByClip[ clipUuid ];

			if ( actionsForClip !== undefined ) {

				return actionsForClip.actionByRoot[ rootUuid ] || null;

			}

			return null;

		},

		// deactivates all previously scheduled actions
		stopAllAction: function () {

			var actions = this._actions,
				nActions = this._nActiveActions,
				bindings = this._bindings,
				nBindings = this._nActiveBindings;

			this._nActiveActions = 0;
			this._nActiveBindings = 0;

			for ( var i = 0; i !== nActions; ++ i ) {

				actions[ i ].reset();

			}

			for ( var i = 0; i !== nBindings; ++ i ) {

				bindings[ i ].useCount = 0;

			}

			return this;

		},

		// advance the time and update apply the animation
		update: function ( deltaTime ) {

			deltaTime *= this.timeScale;

			var actions = this._actions,
				nActions = this._nActiveActions,

				time = this.time += deltaTime,
				timeDirection = Math.sign( deltaTime ),

				accuIndex = this._accuIndex ^= 1;

			// run active actions

			for ( var i = 0; i !== nActions; ++ i ) {

				var action = actions[ i ];

				action._update( time, deltaTime, timeDirection, accuIndex );

			}

			// update scene graph

			var bindings = this._bindings,
				nBindings = this._nActiveBindings;

			for ( var i = 0; i !== nBindings; ++ i ) {

				bindings[ i ].apply( accuIndex );

			}

			return this;

		},

		// return this mixer's root target object
		getRoot: function () {

			return this._root;

		},

		// free all resources specific to a particular clip
		uncacheClip: function ( clip ) {

			var actions = this._actions,
				clipUuid = clip.uuid,
				actionsByClip = this._actionsByClip,
				actionsForClip = actionsByClip[ clipUuid ];

			if ( actionsForClip !== undefined ) {

				// note: just calling _removeInactiveAction would mess up the
				// iteration state and also require updating the state we can
				// just throw away

				var actionsToRemove = actionsForClip.knownActions;

				for ( var i = 0, n = actionsToRemove.length; i !== n; ++ i ) {

					var action = actionsToRemove[ i ];

					this._deactivateAction( action );

					var cacheIndex = action._cacheIndex,
						lastInactiveAction = actions[ actions.length - 1 ];

					action._cacheIndex = null;
					action._byClipCacheIndex = null;

					lastInactiveAction._cacheIndex = cacheIndex;
					actions[ cacheIndex ] = lastInactiveAction;
					actions.pop();

					this._removeInactiveBindingsForAction( action );

				}

				delete actionsByClip[ clipUuid ];

			}

		},

		// free all resources specific to a particular root target object
		uncacheRoot: function ( root ) {

			var rootUuid = root.uuid,
				actionsByClip = this._actionsByClip;

			for ( var clipUuid in actionsByClip ) {

				var actionByRoot = actionsByClip[ clipUuid ].actionByRoot,
					action = actionByRoot[ rootUuid ];

				if ( action !== undefined ) {

					this._deactivateAction( action );
					this._removeInactiveAction( action );

				}

			}

			var bindingsByRoot = this._bindingsByRootAndName,
				bindingByName = bindingsByRoot[ rootUuid ];

			if ( bindingByName !== undefined ) {

				for ( var trackName in bindingByName ) {

					var binding = bindingByName[ trackName ];
					binding.restoreOriginalState();
					this._removeInactiveBinding( binding );

				}

			}

		},

		// remove a targeted clip from the cache
		uncacheAction: function ( clip, optionalRoot ) {

			var action = this.existingAction( clip, optionalRoot );

			if ( action !== null ) {

				this._deactivateAction( action );
				this._removeInactiveAction( action );

			}

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'AnimationAction', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var mixer = new AnimationMixer();
				var clip = new AnimationClip();

				assert.throws(
					function () {

						new AnimationAction();

					},
					new Error( "Mixer can't be null or undefined !" ),
					"raised error instance about undefined or null mixer"
				);

				assert.throws(
					function () {

						new AnimationAction( mixer );

					},
					new Error( "Clip can't be null or undefined !" ),
					"raised error instance about undefined or null clip"
				);

				var animationAction = new AnimationAction( mixer, clip );
				assert.ok( animationAction, "animationAction instanciated" );

			} );

			// PRIVATE STUFF
			QUnit.test( "_update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_updateWeight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_updateTimeScale", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_updateTime", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_setEndings", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_scheduleFading", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "play", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "stop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "reset", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "isRunning", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "isScheduled", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "startAt", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setLoop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setEffectiveWeight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getEffectiveWeight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "fadeIn", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "fadeOut", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "crossFadeFrom", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "crossFadeTo", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "stopFading", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setEffectiveTimeScale", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getEffectiveTimeScale", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setDuration", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "syncWith", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "halt", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "warp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "stopWarping", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getMixer", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getClip", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getRoot", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'AnimationClip', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// STATIC STUFF
			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "CreateFromMorphTargetSequence", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "findByName", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "CreateClipsFromMorphTargetSequences", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseAnimation", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "resetDuration", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "trim", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "optimize", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'AnimationMixer', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PRIVATE STUFF
			QUnit.test( "_bindAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_activateAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_deactivateAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_initMemoryManager", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_isActiveAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_addInactiveAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_removeInactiveAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_removeInactiveBindingsForAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_lendAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_takeBackAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_addInactiveBinding", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_removeInactiveBinding", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_lendBinding", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_takeBackBinding", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_lendControlInterpolant", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_takeBackControlInterpolant", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_controlInterpolantsResultBuffer", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "clipAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "existingAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "stopAllAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getRoot", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "uncacheClip", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "uncacheRoot", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "uncacheAction", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 *
	 * A group of objects that receives a shared animation state.
	 *
	 * Usage:
	 *
	 * 	-	Add objects you would otherwise pass as 'root' to the
	 * 		constructor or the .clipAction method of AnimationMixer.
	 *
	 * 	-	Instead pass this object as 'root'.
	 *
	 * 	-	You can also add and remove objects later when the mixer
	 * 		is running.
	 *
	 * Note:
	 *
	 *  	Objects of this class appear as one object to the mixer,
	 *  	so cache control of the individual objects must be done
	 *  	on the group.
	 *
	 * Limitation:
	 *
	 * 	- 	The animated properties must be compatible among the
	 * 		all objects in the group.
	 *
	 *  -	A single property can either be controlled through a
	 *  	target group or directly, but not both.
	 *
	 * @author tschw
	 */

	function AnimationObjectGroup() {

		this.uuid = _Math.generateUUID();

		// cached objects followed by the active ones
		this._objects = Array.prototype.slice.call( arguments );

		this.nCachedObjects_ = 0;			// threshold
		// note: read by PropertyBinding.Composite

		var indices = {};
		this._indicesByUUID = indices;		// for bookkeeping

		for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

			indices[ arguments[ i ].uuid ] = i;

		}

		this._paths = [];					// inside: string
		this._parsedPaths = [];				// inside: { we don't care, here }
		this._bindings = []; 				// inside: Array< PropertyBinding >
		this._bindingsIndicesByPath = {}; 	// inside: indices in these arrays

		var scope = this;

		this.stats = {

			objects: {
				get total() {

					return scope._objects.length;

				},
				get inUse() {

					return this.total - scope.nCachedObjects_;

				}
			},
			get bindingsPerObject() {

				return scope._bindings.length;

			}

		};

	}

	Object.assign( AnimationObjectGroup.prototype, {

		isAnimationObjectGroup: true,

		add: function () {

			var objects = this._objects,
				nObjects = objects.length,
				nCachedObjects = this.nCachedObjects_,
				indicesByUUID = this._indicesByUUID,
				paths = this._paths,
				parsedPaths = this._parsedPaths,
				bindings = this._bindings,
				nBindings = bindings.length;

			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

				var object = arguments[ i ],
					uuid = object.uuid,
					index = indicesByUUID[ uuid ],
					knownObject = undefined;

				if ( index === undefined ) {

					// unknown object -> add it to the ACTIVE region

					index = nObjects ++;
					indicesByUUID[ uuid ] = index;
					objects.push( object );

					// accounting is done, now do the same for all bindings

					for ( var j = 0, m = nBindings; j !== m; ++ j ) {

						bindings[ j ].push( new PropertyBinding( object, paths[ j ], parsedPaths[ j ] ) );

					}

				} else if ( index < nCachedObjects ) {

					knownObject = objects[ index ];

					// move existing object to the ACTIVE region

					var firstActiveIndex = -- nCachedObjects,
						lastCachedObject = objects[ firstActiveIndex ];

					indicesByUUID[ lastCachedObject.uuid ] = index;
					objects[ index ] = lastCachedObject;

					indicesByUUID[ uuid ] = firstActiveIndex;
					objects[ firstActiveIndex ] = object;

					// accounting is done, now do the same for all bindings

					for ( var j = 0, m = nBindings; j !== m; ++ j ) {

						var bindingsForPath = bindings[ j ],
							lastCached = bindingsForPath[ firstActiveIndex ],
							binding = bindingsForPath[ index ];

						bindingsForPath[ index ] = lastCached;

						if ( binding === undefined ) {

							// since we do not bother to create new bindings
							// for objects that are cached, the binding may
							// or may not exist

							binding = new PropertyBinding( object, paths[ j ], parsedPaths[ j ] );

						}

						bindingsForPath[ firstActiveIndex ] = binding;

					}

				} else if ( objects[ index ] !== knownObject ) {

					console.error( 'THREE.AnimationObjectGroup: Different objects with the same UUID ' +
							'detected. Clean the caches or recreate your infrastructure when reloading scenes.' );

				} // else the object is already where we want it to be

			} // for arguments

			this.nCachedObjects_ = nCachedObjects;

		},

		remove: function () {

			var objects = this._objects,
				nCachedObjects = this.nCachedObjects_,
				indicesByUUID = this._indicesByUUID,
				bindings = this._bindings,
				nBindings = bindings.length;

			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

				var object = arguments[ i ],
					uuid = object.uuid,
					index = indicesByUUID[ uuid ];

				if ( index !== undefined && index >= nCachedObjects ) {

					// move existing object into the CACHED region

					var lastCachedIndex = nCachedObjects ++,
						firstActiveObject = objects[ lastCachedIndex ];

					indicesByUUID[ firstActiveObject.uuid ] = index;
					objects[ index ] = firstActiveObject;

					indicesByUUID[ uuid ] = lastCachedIndex;
					objects[ lastCachedIndex ] = object;

					// accounting is done, now do the same for all bindings

					for ( var j = 0, m = nBindings; j !== m; ++ j ) {

						var bindingsForPath = bindings[ j ],
							firstActive = bindingsForPath[ lastCachedIndex ],
							binding = bindingsForPath[ index ];

						bindingsForPath[ index ] = firstActive;
						bindingsForPath[ lastCachedIndex ] = binding;

					}

				}

			} // for arguments

			this.nCachedObjects_ = nCachedObjects;

		},

		// remove & forget
		uncache: function () {

			var objects = this._objects,
				nObjects = objects.length,
				nCachedObjects = this.nCachedObjects_,
				indicesByUUID = this._indicesByUUID,
				bindings = this._bindings,
				nBindings = bindings.length;

			for ( var i = 0, n = arguments.length; i !== n; ++ i ) {

				var object = arguments[ i ],
					uuid = object.uuid,
					index = indicesByUUID[ uuid ];

				if ( index !== undefined ) {

					delete indicesByUUID[ uuid ];

					if ( index < nCachedObjects ) {

						// object is cached, shrink the CACHED region

						var firstActiveIndex = -- nCachedObjects,
							lastCachedObject = objects[ firstActiveIndex ],
							lastIndex = -- nObjects,
							lastObject = objects[ lastIndex ];

						// last cached object takes this object's place
						indicesByUUID[ lastCachedObject.uuid ] = index;
						objects[ index ] = lastCachedObject;

						// last object goes to the activated slot and pop
						indicesByUUID[ lastObject.uuid ] = firstActiveIndex;
						objects[ firstActiveIndex ] = lastObject;
						objects.pop();

						// accounting is done, now do the same for all bindings

						for ( var j = 0, m = nBindings; j !== m; ++ j ) {

							var bindingsForPath = bindings[ j ],
								lastCached = bindingsForPath[ firstActiveIndex ],
								last = bindingsForPath[ lastIndex ];

							bindingsForPath[ index ] = lastCached;
							bindingsForPath[ firstActiveIndex ] = last;
							bindingsForPath.pop();

						}

					} else {

						// object is active, just swap with the last and pop

						var lastIndex = -- nObjects,
							lastObject = objects[ lastIndex ];

						indicesByUUID[ lastObject.uuid ] = index;
						objects[ index ] = lastObject;
						objects.pop();

						// accounting is done, now do the same for all bindings

						for ( var j = 0, m = nBindings; j !== m; ++ j ) {

							var bindingsForPath = bindings[ j ];

							bindingsForPath[ index ] = bindingsForPath[ lastIndex ];
							bindingsForPath.pop();

						}

					} // cached or active

				} // if object is known

			} // for arguments

			this.nCachedObjects_ = nCachedObjects;

		},

		// Internal interface used by befriended PropertyBinding.Composite:

		subscribe_: function ( path, parsedPath ) {

			// returns an array of bindings for the given path that is changed
			// according to the contained objects in the group

			var indicesByPath = this._bindingsIndicesByPath,
				index = indicesByPath[ path ],
				bindings = this._bindings;

			if ( index !== undefined ) return bindings[ index ];

			var paths = this._paths,
				parsedPaths = this._parsedPaths,
				objects = this._objects,
				nObjects = objects.length,
				nCachedObjects = this.nCachedObjects_,
				bindingsForPath = new Array( nObjects );

			index = bindings.length;

			indicesByPath[ path ] = index;

			paths.push( path );
			parsedPaths.push( parsedPath );
			bindings.push( bindingsForPath );

			for ( var i = nCachedObjects, n = objects.length; i !== n; ++ i ) {

				var object = objects[ i ];
				bindingsForPath[ i ] = new PropertyBinding( object, path, parsedPath );

			}

			return bindingsForPath;

		},

		unsubscribe_: function ( path ) {

			// tells the group to forget about a property path and no longer
			// update the array previously obtained with 'subscribe_'

			var indicesByPath = this._bindingsIndicesByPath,
				index = indicesByPath[ path ];

			if ( index !== undefined ) {

				var paths = this._paths,
					parsedPaths = this._parsedPaths,
					bindings = this._bindings,
					lastBindingsIndex = bindings.length - 1,
					lastBindings = bindings[ lastBindingsIndex ],
					lastBindingsPath = path[ lastBindingsIndex ];

				indicesByPath[ lastBindingsPath ] = index;

				bindings[ index ] = lastBindings;
				bindings.pop();

				parsedPaths[ index ] = parsedPaths[ lastBindingsIndex ];
				parsedPaths.pop();

				paths[ index ] = paths[ lastBindingsIndex ];
				paths.pop();

			}

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author bhouston / http://clara.io
	 */

	function Euler( x, y, z, order ) {

		this._x = x || 0;
		this._y = y || 0;
		this._z = z || 0;
		this._order = order || Euler.DefaultOrder;

	}

	Euler.RotationOrders = [ 'XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX' ];

	Euler.DefaultOrder = 'XYZ';

	Object.defineProperties( Euler.prototype, {

		x: {

			get: function () {

				return this._x;

			},

			set: function ( value ) {

				this._x = value;
				this.onChangeCallback();

			}

		},

		y: {

			get: function () {

				return this._y;

			},

			set: function ( value ) {

				this._y = value;
				this.onChangeCallback();

			}

		},

		z: {

			get: function () {

				return this._z;

			},

			set: function ( value ) {

				this._z = value;
				this.onChangeCallback();

			}

		},

		order: {

			get: function () {

				return this._order;

			},

			set: function ( value ) {

				this._order = value;
				this.onChangeCallback();

			}

		}

	} );

	Object.assign( Euler.prototype, {

		isEuler: true,

		set: function ( x, y, z, order ) {

			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order || this._order;

			this.onChangeCallback();

			return this;

		},

		clone: function () {

			return new this.constructor( this._x, this._y, this._z, this._order );

		},

		copy: function ( euler ) {

			this._x = euler._x;
			this._y = euler._y;
			this._z = euler._z;
			this._order = euler._order;

			this.onChangeCallback();

			return this;

		},

		setFromRotationMatrix: function ( m, order, update ) {

			var clamp = _Math.clamp;

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var te = m.elements;
			var m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ];
			var m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ];
			var m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];

			order = order || this._order;

			if ( order === 'XYZ' ) {

				this._y = Math.asin( clamp( m13, - 1, 1 ) );

				if ( Math.abs( m13 ) < 0.99999 ) {

					this._x = Math.atan2( - m23, m33 );
					this._z = Math.atan2( - m12, m11 );

				} else {

					this._x = Math.atan2( m32, m22 );
					this._z = 0;

				}

			} else if ( order === 'YXZ' ) {

				this._x = Math.asin( - clamp( m23, - 1, 1 ) );

				if ( Math.abs( m23 ) < 0.99999 ) {

					this._y = Math.atan2( m13, m33 );
					this._z = Math.atan2( m21, m22 );

				} else {

					this._y = Math.atan2( - m31, m11 );
					this._z = 0;

				}

			} else if ( order === 'ZXY' ) {

				this._x = Math.asin( clamp( m32, - 1, 1 ) );

				if ( Math.abs( m32 ) < 0.99999 ) {

					this._y = Math.atan2( - m31, m33 );
					this._z = Math.atan2( - m12, m22 );

				} else {

					this._y = 0;
					this._z = Math.atan2( m21, m11 );

				}

			} else if ( order === 'ZYX' ) {

				this._y = Math.asin( - clamp( m31, - 1, 1 ) );

				if ( Math.abs( m31 ) < 0.99999 ) {

					this._x = Math.atan2( m32, m33 );
					this._z = Math.atan2( m21, m11 );

				} else {

					this._x = 0;
					this._z = Math.atan2( - m12, m22 );

				}

			} else if ( order === 'YZX' ) {

				this._z = Math.asin( clamp( m21, - 1, 1 ) );

				if ( Math.abs( m21 ) < 0.99999 ) {

					this._x = Math.atan2( - m23, m22 );
					this._y = Math.atan2( - m31, m11 );

				} else {

					this._x = 0;
					this._y = Math.atan2( m13, m33 );

				}

			} else if ( order === 'XZY' ) {

				this._z = Math.asin( - clamp( m12, - 1, 1 ) );

				if ( Math.abs( m12 ) < 0.99999 ) {

					this._x = Math.atan2( m32, m22 );
					this._y = Math.atan2( m13, m11 );

				} else {

					this._x = Math.atan2( - m23, m33 );
					this._y = 0;

				}

			} else {

				console.warn( 'THREE.Euler: .setFromRotationMatrix() given unsupported order: ' + order );

			}

			this._order = order;

			if ( update !== false ) this.onChangeCallback();

			return this;

		},

		setFromQuaternion: function () {

			var matrix = new Matrix4();

			return function setFromQuaternion( q, order, update ) {

				matrix.makeRotationFromQuaternion( q );

				return this.setFromRotationMatrix( matrix, order, update );

			};

		}(),

		setFromVector3: function ( v, order ) {

			return this.set( v.x, v.y, v.z, order || this._order );

		},

		reorder: function () {

			// WARNING: this discards revolution information -bhouston

			var q = new Quaternion();

			return function reorder( newOrder ) {

				q.setFromEuler( this );

				return this.setFromQuaternion( q, newOrder );

			};

		}(),

		equals: function ( euler ) {

			return ( euler._x === this._x ) && ( euler._y === this._y ) && ( euler._z === this._z ) && ( euler._order === this._order );

		},

		fromArray: function ( array ) {

			this._x = array[ 0 ];
			this._y = array[ 1 ];
			this._z = array[ 2 ];
			if ( array[ 3 ] !== undefined ) this._order = array[ 3 ];

			this.onChangeCallback();

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			array[ offset ] = this._x;
			array[ offset + 1 ] = this._y;
			array[ offset + 2 ] = this._z;
			array[ offset + 3 ] = this._order;

			return array;

		},

		toVector3: function ( optionalResult ) {

			if ( optionalResult ) {

				return optionalResult.set( this._x, this._y, this._z );

			} else {

				return new Vector3( this._x, this._y, this._z );

			}

		},

		onChange: function ( callback ) {

			this.onChangeCallback = callback;

			return this;

		},

		onChangeCallback: function () {}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Layers() {

		this.mask = 1 | 0;

	}

	Object.assign( Layers.prototype, {

		set: function ( channel ) {

			this.mask = 1 << channel | 0;

		},

		enable: function ( channel ) {

			this.mask |= 1 << channel | 0;

		},

		toggle: function ( channel ) {

			this.mask ^= 1 << channel | 0;

		},

		disable: function ( channel ) {

			this.mask &= ~ ( 1 << channel | 0 );

		},

		test: function ( layers ) {

			return ( this.mask & layers.mask ) !== 0;

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author bhouston / http://clara.io
	 * @author tschw
	 */

	function Matrix3() {

		this.elements = [

			1, 0, 0,
			0, 1, 0,
			0, 0, 1

		];

		if ( arguments.length > 0 ) {

			console.error( 'THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.' );

		}

	}

	Object.assign( Matrix3.prototype, {

		isMatrix3: true,

		set: function ( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {

			var te = this.elements;

			te[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;
			te[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;
			te[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;

			return this;

		},

		identity: function () {

			this.set(

				1, 0, 0,
				0, 1, 0,
				0, 0, 1

			);

			return this;

		},

		clone: function () {

			return new this.constructor().fromArray( this.elements );

		},

		copy: function ( m ) {

			var te = this.elements;
			var me = m.elements;

			te[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ];
			te[ 3 ] = me[ 3 ]; te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ];
			te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ]; te[ 8 ] = me[ 8 ];

			return this;

		},

		setFromMatrix4: function ( m ) {

			var me = m.elements;

			this.set(

				me[ 0 ], me[ 4 ], me[ 8 ],
				me[ 1 ], me[ 5 ], me[ 9 ],
				me[ 2 ], me[ 6 ], me[ 10 ]

			);

			return this;

		},

		applyToBufferAttribute: function () {

			var v1 = new Vector3();

			return function applyToBufferAttribute( attribute ) {

				for ( var i = 0, l = attribute.count; i < l; i ++ ) {

					v1.x = attribute.getX( i );
					v1.y = attribute.getY( i );
					v1.z = attribute.getZ( i );

					v1.applyMatrix3( this );

					attribute.setXYZ( i, v1.x, v1.y, v1.z );

				}

				return attribute;

			};

		}(),

		multiply: function ( m ) {

			return this.multiplyMatrices( this, m );

		},

		premultiply: function ( m ) {

			return this.multiplyMatrices( m, this );

		},

		multiplyMatrices: function ( a, b ) {

			var ae = a.elements;
			var be = b.elements;
			var te = this.elements;

			var a11 = ae[ 0 ], a12 = ae[ 3 ], a13 = ae[ 6 ];
			var a21 = ae[ 1 ], a22 = ae[ 4 ], a23 = ae[ 7 ];
			var a31 = ae[ 2 ], a32 = ae[ 5 ], a33 = ae[ 8 ];

			var b11 = be[ 0 ], b12 = be[ 3 ], b13 = be[ 6 ];
			var b21 = be[ 1 ], b22 = be[ 4 ], b23 = be[ 7 ];
			var b31 = be[ 2 ], b32 = be[ 5 ], b33 = be[ 8 ];

			te[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31;
			te[ 3 ] = a11 * b12 + a12 * b22 + a13 * b32;
			te[ 6 ] = a11 * b13 + a12 * b23 + a13 * b33;

			te[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31;
			te[ 4 ] = a21 * b12 + a22 * b22 + a23 * b32;
			te[ 7 ] = a21 * b13 + a22 * b23 + a23 * b33;

			te[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31;
			te[ 5 ] = a31 * b12 + a32 * b22 + a33 * b32;
			te[ 8 ] = a31 * b13 + a32 * b23 + a33 * b33;

			return this;

		},

		multiplyScalar: function ( s ) {

			var te = this.elements;

			te[ 0 ] *= s; te[ 3 ] *= s; te[ 6 ] *= s;
			te[ 1 ] *= s; te[ 4 ] *= s; te[ 7 ] *= s;
			te[ 2 ] *= s; te[ 5 ] *= s; te[ 8 ] *= s;

			return this;

		},

		determinant: function () {

			var te = this.elements;

			var a = te[ 0 ], b = te[ 1 ], c = te[ 2 ],
				d = te[ 3 ], e = te[ 4 ], f = te[ 5 ],
				g = te[ 6 ], h = te[ 7 ], i = te[ 8 ];

			return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;

		},

		getInverse: function ( matrix, throwOnDegenerate ) {

			if ( matrix && matrix.isMatrix4 ) {

				console.error( "THREE.Matrix3: .getInverse() no longer takes a Matrix4 argument." );

			}

			var me = matrix.elements,
				te = this.elements,

				n11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ],
				n12 = me[ 3 ], n22 = me[ 4 ], n32 = me[ 5 ],
				n13 = me[ 6 ], n23 = me[ 7 ], n33 = me[ 8 ],

				t11 = n33 * n22 - n32 * n23,
				t12 = n32 * n13 - n33 * n12,
				t13 = n23 * n12 - n22 * n13,

				det = n11 * t11 + n21 * t12 + n31 * t13;

			if ( det === 0 ) {

				var msg = "THREE.Matrix3: .getInverse() can't invert matrix, determinant is 0";

				if ( throwOnDegenerate === true ) {

					throw new Error( msg );

				} else {

					console.warn( msg );

				}

				return this.identity();

			}

			var detInv = 1 / det;

			te[ 0 ] = t11 * detInv;
			te[ 1 ] = ( n31 * n23 - n33 * n21 ) * detInv;
			te[ 2 ] = ( n32 * n21 - n31 * n22 ) * detInv;

			te[ 3 ] = t12 * detInv;
			te[ 4 ] = ( n33 * n11 - n31 * n13 ) * detInv;
			te[ 5 ] = ( n31 * n12 - n32 * n11 ) * detInv;

			te[ 6 ] = t13 * detInv;
			te[ 7 ] = ( n21 * n13 - n23 * n11 ) * detInv;
			te[ 8 ] = ( n22 * n11 - n21 * n12 ) * detInv;

			return this;

		},

		transpose: function () {

			var tmp, m = this.elements;

			tmp = m[ 1 ]; m[ 1 ] = m[ 3 ]; m[ 3 ] = tmp;
			tmp = m[ 2 ]; m[ 2 ] = m[ 6 ]; m[ 6 ] = tmp;
			tmp = m[ 5 ]; m[ 5 ] = m[ 7 ]; m[ 7 ] = tmp;

			return this;

		},

		getNormalMatrix: function ( matrix4 ) {

			return this.setFromMatrix4( matrix4 ).getInverse( this ).transpose();

		},

		transposeIntoArray: function ( r ) {

			var m = this.elements;

			r[ 0 ] = m[ 0 ];
			r[ 1 ] = m[ 3 ];
			r[ 2 ] = m[ 6 ];
			r[ 3 ] = m[ 1 ];
			r[ 4 ] = m[ 4 ];
			r[ 5 ] = m[ 7 ];
			r[ 6 ] = m[ 2 ];
			r[ 7 ] = m[ 5 ];
			r[ 8 ] = m[ 8 ];

			return this;

		},

		setUvTransform: function ( tx, ty, sx, sy, rotation, cx, cy ) {

			var c = Math.cos( rotation );
			var s = Math.sin( rotation );

			this.set(
				sx * c, sx * s, - sx * ( c * cx + s * cy ) + cx + tx,
				- sy * s, sy * c, - sy * ( - s * cx + c * cy ) + cy + ty,
				0, 0, 1
			);

		},

		scale: function ( sx, sy ) {

			var te = this.elements;

			te[ 0 ] *= sx; te[ 3 ] *= sx; te[ 6 ] *= sx;
			te[ 1 ] *= sy; te[ 4 ] *= sy; te[ 7 ] *= sy;

			return this;

		},

		rotate: function ( theta ) {

			var c = Math.cos( theta );
			var s = Math.sin( theta );

			var te = this.elements;

			var a11 = te[ 0 ], a12 = te[ 3 ], a13 = te[ 6 ];
			var a21 = te[ 1 ], a22 = te[ 4 ], a23 = te[ 7 ];

			te[ 0 ] = c * a11 + s * a21;
			te[ 3 ] = c * a12 + s * a22;
			te[ 6 ] = c * a13 + s * a23;

			te[ 1 ] = - s * a11 + c * a21;
			te[ 4 ] = - s * a12 + c * a22;
			te[ 7 ] = - s * a13 + c * a23;

			return this;

		},

		translate: function ( tx, ty ) {

			var te = this.elements;

			te[ 0 ] += tx * te[ 2 ]; te[ 3 ] += tx * te[ 5 ]; te[ 6 ] += tx * te[ 8 ];
			te[ 1 ] += ty * te[ 2 ]; te[ 4 ] += ty * te[ 5 ]; te[ 7 ] += ty * te[ 8 ];

			return this;

		},

		equals: function ( matrix ) {

			var te = this.elements;
			var me = matrix.elements;

			for ( var i = 0; i < 9; i ++ ) {

				if ( te[ i ] !== me[ i ] ) return false;

			}

			return true;

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			for ( var i = 0; i < 9; i ++ ) {

				this.elements[ i ] = array[ i + offset ];

			}

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			var te = this.elements;

			array[ offset ] = te[ 0 ];
			array[ offset + 1 ] = te[ 1 ];
			array[ offset + 2 ] = te[ 2 ];

			array[ offset + 3 ] = te[ 3 ];
			array[ offset + 4 ] = te[ 4 ];
			array[ offset + 5 ] = te[ 5 ];

			array[ offset + 6 ] = te[ 6 ];
			array[ offset + 7 ] = te[ 7 ];
			array[ offset + 8 ] = te[ 8 ];

			return array;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author WestLangley / http://github.com/WestLangley
	 * @author elephantatwork / www.elephantatwork.ch
	 */

	var object3DId = 0;

	function Object3D() {

		Object.defineProperty( this, 'id', { value: object3DId ++ } );

		this.uuid = _Math.generateUUID();

		this.name = '';
		this.type = 'Object3D';

		this.parent = null;
		this.children = [];

		this.up = Object3D.DefaultUp.clone();

		var position = new Vector3();
		var rotation = new Euler();
		var quaternion = new Quaternion();
		var scale = new Vector3( 1, 1, 1 );

		function onRotationChange() {

			quaternion.setFromEuler( rotation, false );

		}

		function onQuaternionChange() {

			rotation.setFromQuaternion( quaternion, undefined, false );

		}

		rotation.onChange( onRotationChange );
		quaternion.onChange( onQuaternionChange );

		Object.defineProperties( this, {
			position: {
				enumerable: true,
				value: position
			},
			rotation: {
				enumerable: true,
				value: rotation
			},
			quaternion: {
				enumerable: true,
				value: quaternion
			},
			scale: {
				enumerable: true,
				value: scale
			},
			modelViewMatrix: {
				value: new Matrix4()
			},
			normalMatrix: {
				value: new Matrix3()
			}
		} );

		this.matrix = new Matrix4();
		this.matrixWorld = new Matrix4();

		this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
		this.matrixWorldNeedsUpdate = false;

		this.layers = new Layers();
		this.visible = true;

		this.castShadow = false;
		this.receiveShadow = false;

		this.frustumCulled = true;
		this.renderOrder = 0;

		this.userData = {};

	}

	Object3D.DefaultUp = new Vector3( 0, 1, 0 );
	Object3D.DefaultMatrixAutoUpdate = true;

	Object.assign( Object3D.prototype, EventDispatcher.prototype, {

		isObject3D: true,

		onBeforeRender: function () {},
		onAfterRender: function () {},

		applyMatrix: function ( matrix ) {

			this.matrix.multiplyMatrices( matrix, this.matrix );

			this.matrix.decompose( this.position, this.quaternion, this.scale );

		},

		applyQuaternion: function ( q ) {

			this.quaternion.premultiply( q );

			return this;

		},

		setRotationFromAxisAngle: function ( axis, angle ) {

			// assumes axis is normalized

			this.quaternion.setFromAxisAngle( axis, angle );

		},

		setRotationFromEuler: function ( euler ) {

			this.quaternion.setFromEuler( euler, true );

		},

		setRotationFromMatrix: function ( m ) {

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			this.quaternion.setFromRotationMatrix( m );

		},

		setRotationFromQuaternion: function ( q ) {

			// assumes q is normalized

			this.quaternion.copy( q );

		},

		rotateOnAxis: function () {

			// rotate object on axis in object space
			// axis is assumed to be normalized

			var q1 = new Quaternion();

			return function rotateOnAxis( axis, angle ) {

				q1.setFromAxisAngle( axis, angle );

				this.quaternion.multiply( q1 );

				return this;

			};

		}(),

		rotateOnWorldAxis: function () {

			// rotate object on axis in world space
			// axis is assumed to be normalized
			// method assumes no rotated parent

			var q1 = new Quaternion();

			return function rotateOnWorldAxis( axis, angle ) {

				q1.setFromAxisAngle( axis, angle );

				this.quaternion.premultiply( q1 );

				return this;

			};

		}(),

		rotateX: function () {

			var v1 = new Vector3( 1, 0, 0 );

			return function rotateX( angle ) {

				return this.rotateOnAxis( v1, angle );

			};

		}(),

		rotateY: function () {

			var v1 = new Vector3( 0, 1, 0 );

			return function rotateY( angle ) {

				return this.rotateOnAxis( v1, angle );

			};

		}(),

		rotateZ: function () {

			var v1 = new Vector3( 0, 0, 1 );

			return function rotateZ( angle ) {

				return this.rotateOnAxis( v1, angle );

			};

		}(),

		translateOnAxis: function () {

			// translate object by distance along axis in object space
			// axis is assumed to be normalized

			var v1 = new Vector3();

			return function translateOnAxis( axis, distance ) {

				v1.copy( axis ).applyQuaternion( this.quaternion );

				this.position.add( v1.multiplyScalar( distance ) );

				return this;

			};

		}(),

		translateX: function () {

			var v1 = new Vector3( 1, 0, 0 );

			return function translateX( distance ) {

				return this.translateOnAxis( v1, distance );

			};

		}(),

		translateY: function () {

			var v1 = new Vector3( 0, 1, 0 );

			return function translateY( distance ) {

				return this.translateOnAxis( v1, distance );

			};

		}(),

		translateZ: function () {

			var v1 = new Vector3( 0, 0, 1 );

			return function translateZ( distance ) {

				return this.translateOnAxis( v1, distance );

			};

		}(),

		localToWorld: function ( vector ) {

			return vector.applyMatrix4( this.matrixWorld );

		},

		worldToLocal: function () {

			var m1 = new Matrix4();

			return function worldToLocal( vector ) {

				return vector.applyMatrix4( m1.getInverse( this.matrixWorld ) );

			};

		}(),

		lookAt: function () {

			// This method does not support objects with rotated and/or translated parent(s)

			var m1 = new Matrix4();
			var vector = new Vector3();

			return function lookAt( x, y, z ) {

				if ( x.isVector3 ) {

					vector.copy( x );

				} else {

					vector.set( x, y, z );

				}

				if ( this.isCamera ) {

					m1.lookAt( this.position, vector, this.up );

				} else {

					m1.lookAt( vector, this.position, this.up );

				}

				this.quaternion.setFromRotationMatrix( m1 );

			};

		}(),

		add: function ( object ) {

			if ( arguments.length > 1 ) {

				for ( var i = 0; i < arguments.length; i ++ ) {

					this.add( arguments[ i ] );

				}

				return this;

			}

			if ( object === this ) {

				console.error( "THREE.Object3D.add: object can't be added as a child of itself.", object );
				return this;

			}

			if ( ( object && object.isObject3D ) ) {

				if ( object.parent !== null ) {

					object.parent.remove( object );

				}

				object.parent = this;
				object.dispatchEvent( { type: 'added' } );

				this.children.push( object );

			} else {

				console.error( "THREE.Object3D.add: object not an instance of THREE.Object3D.", object );

			}

			return this;

		},

		remove: function ( object ) {

			if ( arguments.length > 1 ) {

				for ( var i = 0; i < arguments.length; i ++ ) {

					this.remove( arguments[ i ] );

				}

				return this;

			}

			var index = this.children.indexOf( object );

			if ( index !== - 1 ) {

				object.parent = null;

				object.dispatchEvent( { type: 'removed' } );

				this.children.splice( index, 1 );

			}

			return this;

		},

		getObjectById: function ( id ) {

			return this.getObjectByProperty( 'id', id );

		},

		getObjectByName: function ( name ) {

			return this.getObjectByProperty( 'name', name );

		},

		getObjectByProperty: function ( name, value ) {

			if ( this[ name ] === value ) return this;

			for ( var i = 0, l = this.children.length; i < l; i ++ ) {

				var child = this.children[ i ];
				var object = child.getObjectByProperty( name, value );

				if ( object !== undefined ) {

					return object;

				}

			}

			return undefined;

		},

		getWorldPosition: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();

			this.updateMatrixWorld( true );

			return result.setFromMatrixPosition( this.matrixWorld );

		},

		getWorldQuaternion: function () {

			var position = new Vector3();
			var scale = new Vector3();

			return function getWorldQuaternion( optionalTarget ) {

				var result = optionalTarget || new Quaternion();

				this.updateMatrixWorld( true );

				this.matrixWorld.decompose( position, result, scale );

				return result;

			};

		}(),

		getWorldRotation: function () {

			var quaternion = new Quaternion();

			return function getWorldRotation( optionalTarget ) {

				var result = optionalTarget || new Euler();

				this.getWorldQuaternion( quaternion );

				return result.setFromQuaternion( quaternion, this.rotation.order, false );

			};

		}(),

		getWorldScale: function () {

			var position = new Vector3();
			var quaternion = new Quaternion();

			return function getWorldScale( optionalTarget ) {

				var result = optionalTarget || new Vector3();

				this.updateMatrixWorld( true );

				this.matrixWorld.decompose( position, quaternion, result );

				return result;

			};

		}(),

		getWorldDirection: function () {

			var quaternion = new Quaternion();

			return function getWorldDirection( optionalTarget ) {

				var result = optionalTarget || new Vector3();

				this.getWorldQuaternion( quaternion );

				return result.set( 0, 0, 1 ).applyQuaternion( quaternion );

			};

		}(),

		raycast: function () {},

		traverse: function ( callback ) {

			callback( this );

			var children = this.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				children[ i ].traverse( callback );

			}

		},

		traverseVisible: function ( callback ) {

			if ( this.visible === false ) return;

			callback( this );

			var children = this.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				children[ i ].traverseVisible( callback );

			}

		},

		traverseAncestors: function ( callback ) {

			var parent = this.parent;

			if ( parent !== null ) {

				callback( parent );

				parent.traverseAncestors( callback );

			}

		},

		updateMatrix: function () {

			this.matrix.compose( this.position, this.quaternion, this.scale );

			this.matrixWorldNeedsUpdate = true;

		},

		updateMatrixWorld: function ( force ) {

			if ( this.matrixAutoUpdate ) this.updateMatrix();

			if ( this.matrixWorldNeedsUpdate || force ) {

				if ( this.parent === null ) {

					this.matrixWorld.copy( this.matrix );

				} else {

					this.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );

				}

				this.matrixWorldNeedsUpdate = false;

				force = true;

			}

			// update children

			var children = this.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				children[ i ].updateMatrixWorld( force );

			}

		},

		toJSON: function ( meta ) {

			// meta is a string when called from JSON.stringify
			var isRootObject = ( meta === undefined || typeof meta === 'string' );

			var output = {};

			// meta is a hash used to collect geometries, materials.
			// not providing it implies that this is the root object
			// being serialized.
			if ( isRootObject ) {

				// initialize meta obj
				meta = {
					geometries: {},
					materials: {},
					textures: {},
					images: {}
				};

				output.metadata = {
					version: 4.5,
					type: 'Object',
					generator: 'Object3D.toJSON'
				};

			}

			// standard Object3D serialization

			var object = {};

			object.uuid = this.uuid;
			object.type = this.type;

			if ( this.name !== '' ) object.name = this.name;
			if ( this.castShadow === true ) object.castShadow = true;
			if ( this.receiveShadow === true ) object.receiveShadow = true;
			if ( this.visible === false ) object.visible = false;
			if ( JSON.stringify( this.userData ) !== '{}' ) object.userData = this.userData;

			object.matrix = this.matrix.toArray();

			//

			function serialize( library, element ) {

				if ( library[ element.uuid ] === undefined ) {

					library[ element.uuid ] = element.toJSON( meta );

				}

				return element.uuid;

			}

			if ( this.geometry !== undefined ) {

				object.geometry = serialize( meta.geometries, this.geometry );

			}

			if ( this.material !== undefined ) {

				if ( Array.isArray( this.material ) ) {

					var uuids = [];

					for ( var i = 0, l = this.material.length; i < l; i ++ ) {

						uuids.push( serialize( meta.materials, this.material[ i ] ) );

					}

					object.material = uuids;

				} else {

					object.material = serialize( meta.materials, this.material );

				}

			}

			//

			if ( this.children.length > 0 ) {

				object.children = [];

				for ( var i = 0; i < this.children.length; i ++ ) {

					object.children.push( this.children[ i ].toJSON( meta ).object );

				}

			}

			if ( isRootObject ) {

				var geometries = extractFromCache( meta.geometries );
				var materials = extractFromCache( meta.materials );
				var textures = extractFromCache( meta.textures );
				var images = extractFromCache( meta.images );

				if ( geometries.length > 0 ) output.geometries = geometries;
				if ( materials.length > 0 ) output.materials = materials;
				if ( textures.length > 0 ) output.textures = textures;
				if ( images.length > 0 ) output.images = images;

			}

			output.object = object;

			return output;

			// extract data from the cache hash
			// remove metadata on each item
			// and return as array
			function extractFromCache( cache ) {

				var values = [];
				for ( var key in cache ) {

					var data = cache[ key ];
					delete data.metadata;
					values.push( data );

				}
				return values;

			}

		},

		clone: function ( recursive ) {

			return new this.constructor().copy( this, recursive );

		},

		copy: function ( source, recursive ) {

			if ( recursive === undefined ) recursive = true;

			this.name = source.name;

			this.up.copy( source.up );

			this.position.copy( source.position );
			this.quaternion.copy( source.quaternion );
			this.scale.copy( source.scale );

			this.matrix.copy( source.matrix );
			this.matrixWorld.copy( source.matrixWorld );

			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;

			this.layers.mask = source.layers.mask;
			this.visible = source.visible;

			this.castShadow = source.castShadow;
			this.receiveShadow = source.receiveShadow;

			this.frustumCulled = source.frustumCulled;
			this.renderOrder = source.renderOrder;

			this.userData = JSON.parse( JSON.stringify( source.userData ) );

			if ( recursive === true ) {

				for ( var i = 0; i < source.children.length; i ++ ) {

					var child = source.children[ i ];
					this.add( child.clone() );

				}

			}

			return this;

		}

	} );

	/**
	 * @author tschw
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( "Animation", () => {

		QUnit.module.todo( "AnimationObjectGroup", () => {

			var ObjectA = new Object3D(),
				ObjectB = new Object3D(),
				ObjectC = new Object3D(),

				PathA = 'object.position',
				PathB = 'object.rotation',
				PathC = 'object.scale',

				ParsedPathA = PropertyBinding.parseTrackName( PathA ),
				ParsedPathB = PropertyBinding.parseTrackName( PathB ),
				ParsedPathC = PropertyBinding.parseTrackName( PathC );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PRIVATE STUFF
			QUnit.test( "subscribe_", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} ); // Todo: Naming guys -_-'

			QUnit.test( "unsubscribe_", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} ); // Todo: Naming guys -_-'

			// PUBLIC STUFF
			QUnit.test( "isAnimationObjectGroup", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "add", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "remove", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "uncache", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "smoke test", ( assert ) => {

				var expect = function expect( testIndex, group, bindings, path, cached, roots ) {

					var rootNodes = [], pathsOk = true, nodesOk = true;

					for ( var i = group.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {

						if ( bindings[ i ].path !== path ) pathsOk = false;
						rootNodes.push( bindings[ i ].rootNode );

					}

					for ( var i = 0, n = roots.length; i !== n; ++ i ) {

						if ( rootNodes.indexOf( roots[ i ] ) === - 1 ) nodesOk = false;

					}

					assert.ok( pathsOk, QUnit.testIndex + " paths" );
					assert.ok( nodesOk, QUnit.testIndex + " nodes" );
					assert.ok( group.nCachedObjects_ === cached, QUnit.testIndex + " cache size" );
					assert.ok( bindings.length - group.nCachedObjects_ === roots.length, QUnit.testIndex + " object count" );

				};

				// initial state

				var groupA = new AnimationObjectGroup();
				assert.ok( groupA instanceof AnimationObjectGroup, "constructor (w/o args)" );

				var bindingsAA = groupA.subscribe_( PathA, ParsedPathA );
				expect( 0, groupA, bindingsAA, PathA, 0, [] );

				var groupB = new AnimationObjectGroup( ObjectA, ObjectB );
				assert.ok( groupB instanceof AnimationObjectGroup, "constructor (with args)" );

				var bindingsBB = groupB.subscribe_( PathB, ParsedPathB );
				expect( 1, groupB, bindingsBB, PathB, 0, [ ObjectA, ObjectB ] );

				// add

				groupA.add( ObjectA, ObjectB );
				expect( 2, groupA, bindingsAA, PathA, 0, [ ObjectA, ObjectB ] );

				groupB.add( ObjectC );
				expect( 3, groupB, bindingsBB, PathB, 0, [ ObjectA, ObjectB, ObjectC ] );

				// remove

				groupA.remove( ObjectA, ObjectC );
				expect( 4, groupA, bindingsAA, PathA, 1, [ ObjectB ] );

				groupB.remove( ObjectA, ObjectB, ObjectC );
				expect( 5, groupB, bindingsBB, PathB, 3, [] );

				// subscribe after re-add

				groupA.add( ObjectC );
				expect( 6, groupA, bindingsAA, PathA, 1, [ ObjectB, ObjectC ] );
				var bindingsAC = groupA.subscribe_( PathC, ParsedPathC );
				expect( 7, groupA, bindingsAC, PathC, 1, [ ObjectB, ObjectC ] );

				// re-add after subscribe

				var bindingsBC = groupB.subscribe_( PathC, ParsedPathC );
				groupB.add( ObjectA, ObjectB );
				expect( 8, groupB, bindingsBB, PathB, 1, [ ObjectA, ObjectB ] );

				// unsubscribe

				var copyOfBindingsBC = bindingsBC.slice();
				groupB.unsubscribe_( PathC );
				groupB.add( ObjectC );
				assert.deepEqual( bindingsBC, copyOfBindingsBC, "no more update after unsubscribe" );

				// uncache active

				groupB.uncache( ObjectA );
				expect( 9, groupB, bindingsBB, PathB, 0, [ ObjectB, ObjectC ] );

				// uncache cached

				groupA.uncache( ObjectA );
				expect( 10, groupA, bindingsAC, PathC, 0, [ ObjectB, ObjectC ] );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'AnimationUtils', () => {

			// PUBLIC STUFF
			QUnit.test( "arraySlice", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "convertArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "isTypedArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getKeyframeOrder", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "sortedArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "flattenJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'KeyframeTrack', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// STATIC STUFF
			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_getTrackTypeForValueTypeName", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "TimeBufferType", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "ValueBufferType", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "DefaultInterpolation", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "InterpolantFactoryMethodDiscrete", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "InterpolantFactoryMethodLinear", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "InterpolantFactoryMethodSmooth", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setInterpolation", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getInterpolation", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getValueSize", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "shift", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "scale", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "trim", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "validate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "optimize", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	var ColorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,
		'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,
		'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,
		'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,
		'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,
		'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,
		'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,
		'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,
		'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,
		'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,
		'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,
		'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,
		'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,
		'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,
		'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,
		'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,
		'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,
		'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,
		'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,
		'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'rebeccapurple': 0x663399, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,
		'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,
		'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,
		'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,
		'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };

	function Color( r, g, b ) {

		if ( g === undefined && b === undefined ) {

			// r is THREE.Color, hex or string
			return this.set( r );

		}

		return this.setRGB( r, g, b );

	}

	Object.assign( Color.prototype, {

		isColor: true,

		r: 1, g: 1, b: 1,

		set: function ( value ) {

			if ( value && value.isColor ) {

				this.copy( value );

			} else if ( typeof value === 'number' ) {

				this.setHex( value );

			} else if ( typeof value === 'string' ) {

				this.setStyle( value );

			}

			return this;

		},

		setScalar: function ( scalar ) {

			this.r = scalar;
			this.g = scalar;
			this.b = scalar;

			return this;

		},

		setHex: function ( hex ) {

			hex = Math.floor( hex );

			this.r = ( hex >> 16 & 255 ) / 255;
			this.g = ( hex >> 8 & 255 ) / 255;
			this.b = ( hex & 255 ) / 255;

			return this;

		},

		setRGB: function ( r, g, b ) {

			this.r = r;
			this.g = g;
			this.b = b;

			return this;

		},

		setHSL: function () {

			function hue2rgb( p, q, t ) {

				if ( t < 0 ) t += 1;
				if ( t > 1 ) t -= 1;
				if ( t < 1 / 6 ) return p + ( q - p ) * 6 * t;
				if ( t < 1 / 2 ) return q;
				if ( t < 2 / 3 ) return p + ( q - p ) * 6 * ( 2 / 3 - t );
				return p;

			}

			return function setHSL( h, s, l ) {

				// h,s,l ranges are in 0.0 - 1.0
				h = _Math.euclideanModulo( h, 1 );
				s = _Math.clamp( s, 0, 1 );
				l = _Math.clamp( l, 0, 1 );

				if ( s === 0 ) {

					this.r = this.g = this.b = l;

				} else {

					var p = l <= 0.5 ? l * ( 1 + s ) : l + s - ( l * s );
					var q = ( 2 * l ) - p;

					this.r = hue2rgb( q, p, h + 1 / 3 );
					this.g = hue2rgb( q, p, h );
					this.b = hue2rgb( q, p, h - 1 / 3 );

				}

				return this;

			};

		}(),

		setStyle: function ( style ) {

			function handleAlpha( string ) {

				if ( string === undefined ) return;

				if ( parseFloat( string ) < 1 ) {

					console.warn( 'THREE.Color: Alpha component of ' + style + ' will be ignored.' );

				}

			}


			var m;

			if ( m = /^((?:rgb|hsl)a?)\(\s*([^\)]*)\)/.exec( style ) ) {

				// rgb / hsl

				var color;
				var name = m[ 1 ];
				var components = m[ 2 ];

				switch ( name ) {

					case 'rgb':
					case 'rgba':

						if ( color = /^(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

							// rgb(255,0,0) rgba(255,0,0,0.5)
							this.r = Math.min( 255, parseInt( color[ 1 ], 10 ) ) / 255;
							this.g = Math.min( 255, parseInt( color[ 2 ], 10 ) ) / 255;
							this.b = Math.min( 255, parseInt( color[ 3 ], 10 ) ) / 255;

							handleAlpha( color[ 5 ] );

							return this;

						}

						if ( color = /^(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

							// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
							this.r = Math.min( 100, parseInt( color[ 1 ], 10 ) ) / 100;
							this.g = Math.min( 100, parseInt( color[ 2 ], 10 ) ) / 100;
							this.b = Math.min( 100, parseInt( color[ 3 ], 10 ) ) / 100;

							handleAlpha( color[ 5 ] );

							return this;

						}

						break;

					case 'hsl':
					case 'hsla':

						if ( color = /^([0-9]*\.?[0-9]+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec( components ) ) {

							// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
							var h = parseFloat( color[ 1 ] ) / 360;
							var s = parseInt( color[ 2 ], 10 ) / 100;
							var l = parseInt( color[ 3 ], 10 ) / 100;

							handleAlpha( color[ 5 ] );

							return this.setHSL( h, s, l );

						}

						break;

				}

			} else if ( m = /^\#([A-Fa-f0-9]+)$/.exec( style ) ) {

				// hex color

				var hex = m[ 1 ];
				var size = hex.length;

				if ( size === 3 ) {

					// #ff0
					this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 0 ), 16 ) / 255;
					this.g = parseInt( hex.charAt( 1 ) + hex.charAt( 1 ), 16 ) / 255;
					this.b = parseInt( hex.charAt( 2 ) + hex.charAt( 2 ), 16 ) / 255;

					return this;

				} else if ( size === 6 ) {

					// #ff0000
					this.r = parseInt( hex.charAt( 0 ) + hex.charAt( 1 ), 16 ) / 255;
					this.g = parseInt( hex.charAt( 2 ) + hex.charAt( 3 ), 16 ) / 255;
					this.b = parseInt( hex.charAt( 4 ) + hex.charAt( 5 ), 16 ) / 255;

					return this;

				}

			}

			if ( style && style.length > 0 ) {

				// color keywords
				var hex = ColorKeywords[ style ];

				if ( hex !== undefined ) {

					// red
					this.setHex( hex );

				} else {

					// unknown color
					console.warn( 'THREE.Color: Unknown color ' + style );

				}

			}

			return this;

		},

		clone: function () {

			return new this.constructor( this.r, this.g, this.b );

		},

		copy: function ( color ) {

			this.r = color.r;
			this.g = color.g;
			this.b = color.b;

			return this;

		},

		copyGammaToLinear: function ( color, gammaFactor ) {

			if ( gammaFactor === undefined ) gammaFactor = 2.0;

			this.r = Math.pow( color.r, gammaFactor );
			this.g = Math.pow( color.g, gammaFactor );
			this.b = Math.pow( color.b, gammaFactor );

			return this;

		},

		copyLinearToGamma: function ( color, gammaFactor ) {

			if ( gammaFactor === undefined ) gammaFactor = 2.0;

			var safeInverse = ( gammaFactor > 0 ) ? ( 1.0 / gammaFactor ) : 1.0;

			this.r = Math.pow( color.r, safeInverse );
			this.g = Math.pow( color.g, safeInverse );
			this.b = Math.pow( color.b, safeInverse );

			return this;

		},

		convertGammaToLinear: function () {

			var r = this.r, g = this.g, b = this.b;

			this.r = r * r;
			this.g = g * g;
			this.b = b * b;

			return this;

		},

		convertLinearToGamma: function () {

			this.r = Math.sqrt( this.r );
			this.g = Math.sqrt( this.g );
			this.b = Math.sqrt( this.b );

			return this;

		},

		getHex: function () {

			return ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;

		},

		getHexString: function () {

			return ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );

		},

		getHSL: function ( optionalTarget ) {

			// h,s,l ranges are in 0.0 - 1.0

			var hsl = optionalTarget || { h: 0, s: 0, l: 0 };

			var r = this.r, g = this.g, b = this.b;

			var max = Math.max( r, g, b );
			var min = Math.min( r, g, b );

			var hue, saturation;
			var lightness = ( min + max ) / 2.0;

			if ( min === max ) {

				hue = 0;
				saturation = 0;

			} else {

				var delta = max - min;

				saturation = lightness <= 0.5 ? delta / ( max + min ) : delta / ( 2 - max - min );

				switch ( max ) {

					case r: hue = ( g - b ) / delta + ( g < b ? 6 : 0 ); break;
					case g: hue = ( b - r ) / delta + 2; break;
					case b: hue = ( r - g ) / delta + 4; break;

				}

				hue /= 6;

			}

			hsl.h = hue;
			hsl.s = saturation;
			hsl.l = lightness;

			return hsl;

		},

		getStyle: function () {

			return 'rgb(' + ( ( this.r * 255 ) | 0 ) + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';

		},

		offsetHSL: function ( h, s, l ) {

			var hsl = this.getHSL();

			hsl.h += h; hsl.s += s; hsl.l += l;

			this.setHSL( hsl.h, hsl.s, hsl.l );

			return this;

		},

		add: function ( color ) {

			this.r += color.r;
			this.g += color.g;
			this.b += color.b;

			return this;

		},

		addColors: function ( color1, color2 ) {

			this.r = color1.r + color2.r;
			this.g = color1.g + color2.g;
			this.b = color1.b + color2.b;

			return this;

		},

		addScalar: function ( s ) {

			this.r += s;
			this.g += s;
			this.b += s;

			return this;

		},

		sub: function ( color ) {

			this.r = Math.max( 0, this.r - color.r );
			this.g = Math.max( 0, this.g - color.g );
			this.b = Math.max( 0, this.b - color.b );

			return this;

		},

		multiply: function ( color ) {

			this.r *= color.r;
			this.g *= color.g;
			this.b *= color.b;

			return this;

		},

		multiplyScalar: function ( s ) {

			this.r *= s;
			this.g *= s;
			this.b *= s;

			return this;

		},

		lerp: function ( color, alpha ) {

			this.r += ( color.r - this.r ) * alpha;
			this.g += ( color.g - this.g ) * alpha;
			this.b += ( color.b - this.b ) * alpha;

			return this;

		},

		equals: function ( c ) {

			return ( c.r === this.r ) && ( c.g === this.g ) && ( c.b === this.b );

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			this.r = array[ offset ];
			this.g = array[ offset + 1 ];
			this.b = array[ offset + 2 ];

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			array[ offset ] = this.r;
			array[ offset + 1 ] = this.g;
			array[ offset + 2 ] = this.b;

			return array;

		},

		toJSON: function () {

			return this.getHex();

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Face3( a, b, c, normal, color, materialIndex ) {

		this.a = a;
		this.b = b;
		this.c = c;

		this.normal = ( normal && normal.isVector3 ) ? normal : new Vector3();
		this.vertexNormals = Array.isArray( normal ) ? normal : [];

		this.color = ( color && color.isColor ) ? color : new Color();
		this.vertexColors = Array.isArray( color ) ? color : [];

		this.materialIndex = materialIndex !== undefined ? materialIndex : 0;

	}

	Object.assign( Face3.prototype, {

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( source ) {

			this.a = source.a;
			this.b = source.b;
			this.c = source.c;

			this.normal.copy( source.normal );
			this.color.copy( source.color );

			this.materialIndex = source.materialIndex;

			for ( var i = 0, il = source.vertexNormals.length; i < il; i ++ ) {

				this.vertexNormals[ i ] = source.vertexNormals[ i ].clone();

			}

			for ( var i = 0, il = source.vertexColors.length; i < il; i ++ ) {

				this.vertexColors[ i ] = source.vertexColors[ i ].clone();

			}

			return this;

		}

	} );

	/**
	 * @author bhouston / http://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 */

	function Box3( min, max ) {

		this.min = ( min !== undefined ) ? min : new Vector3( + Infinity, + Infinity, + Infinity );
		this.max = ( max !== undefined ) ? max : new Vector3( - Infinity, - Infinity, - Infinity );

	}

	Object.assign( Box3.prototype, {

		isBox3: true,

		set: function ( min, max ) {

			this.min.copy( min );
			this.max.copy( max );

			return this;

		},

		setFromArray: function ( array ) {

			var minX = + Infinity;
			var minY = + Infinity;
			var minZ = + Infinity;

			var maxX = - Infinity;
			var maxY = - Infinity;
			var maxZ = - Infinity;

			for ( var i = 0, l = array.length; i < l; i += 3 ) {

				var x = array[ i ];
				var y = array[ i + 1 ];
				var z = array[ i + 2 ];

				if ( x < minX ) minX = x;
				if ( y < minY ) minY = y;
				if ( z < minZ ) minZ = z;

				if ( x > maxX ) maxX = x;
				if ( y > maxY ) maxY = y;
				if ( z > maxZ ) maxZ = z;

			}

			this.min.set( minX, minY, minZ );
			this.max.set( maxX, maxY, maxZ );

			return this;

		},

		setFromBufferAttribute: function ( attribute ) {

			var minX = + Infinity;
			var minY = + Infinity;
			var minZ = + Infinity;

			var maxX = - Infinity;
			var maxY = - Infinity;
			var maxZ = - Infinity;

			for ( var i = 0, l = attribute.count; i < l; i ++ ) {

				var x = attribute.getX( i );
				var y = attribute.getY( i );
				var z = attribute.getZ( i );

				if ( x < minX ) minX = x;
				if ( y < minY ) minY = y;
				if ( z < minZ ) minZ = z;

				if ( x > maxX ) maxX = x;
				if ( y > maxY ) maxY = y;
				if ( z > maxZ ) maxZ = z;

			}

			this.min.set( minX, minY, minZ );
			this.max.set( maxX, maxY, maxZ );

			return this;

		},

		setFromPoints: function ( points ) {

			this.makeEmpty();

			for ( var i = 0, il = points.length; i < il; i ++ ) {

				this.expandByPoint( points[ i ] );

			}

			return this;

		},

		setFromCenterAndSize: function () {

			var v1 = new Vector3();

			return function setFromCenterAndSize( center, size ) {

				var halfSize = v1.copy( size ).multiplyScalar( 0.5 );

				this.min.copy( center ).sub( halfSize );
				this.max.copy( center ).add( halfSize );

				return this;

			};

		}(),

		setFromObject: function ( object ) {

			this.makeEmpty();

			return this.expandByObject( object );

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( box ) {

			this.min.copy( box.min );
			this.max.copy( box.max );

			return this;

		},

		makeEmpty: function () {

			this.min.x = this.min.y = this.min.z = + Infinity;
			this.max.x = this.max.y = this.max.z = - Infinity;

			return this;

		},

		isEmpty: function () {

			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

			return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ) || ( this.max.z < this.min.z );

		},

		getCenter: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();
			return this.isEmpty() ? result.set( 0, 0, 0 ) : result.addVectors( this.min, this.max ).multiplyScalar( 0.5 );

		},

		getSize: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();
			return this.isEmpty() ? result.set( 0, 0, 0 ) : result.subVectors( this.max, this.min );

		},

		expandByPoint: function ( point ) {

			this.min.min( point );
			this.max.max( point );

			return this;

		},

		expandByVector: function ( vector ) {

			this.min.sub( vector );
			this.max.add( vector );

			return this;

		},

		expandByScalar: function ( scalar ) {

			this.min.addScalar( - scalar );
			this.max.addScalar( scalar );

			return this;

		},

		expandByObject: function () {

			// Computes the world-axis-aligned bounding box of an object (including its children),
			// accounting for both the object's, and children's, world transforms

			var scope, i, l;

			var v1 = new Vector3();

			function traverse( node ) {

				var geometry = node.geometry;

				if ( geometry !== undefined ) {

					if ( geometry.isGeometry ) {

						var vertices = geometry.vertices;

						for ( i = 0, l = vertices.length; i < l; i ++ ) {

							v1.copy( vertices[ i ] );
							v1.applyMatrix4( node.matrixWorld );

							scope.expandByPoint( v1 );

						}

					} else if ( geometry.isBufferGeometry ) {

						var attribute = geometry.attributes.position;

						if ( attribute !== undefined ) {

							for ( i = 0, l = attribute.count; i < l; i ++ ) {

								v1.fromBufferAttribute( attribute, i ).applyMatrix4( node.matrixWorld );

								scope.expandByPoint( v1 );

							}

						}

					}

				}

			}

			return function expandByObject( object ) {

				scope = this;

				object.updateMatrixWorld( true );

				object.traverse( traverse );

				return this;

			};

		}(),

		containsPoint: function ( point ) {

			return point.x < this.min.x || point.x > this.max.x ||
				point.y < this.min.y || point.y > this.max.y ||
				point.z < this.min.z || point.z > this.max.z ? false : true;

		},

		containsBox: function ( box ) {

			return this.min.x <= box.min.x && box.max.x <= this.max.x &&
				this.min.y <= box.min.y && box.max.y <= this.max.y &&
				this.min.z <= box.min.z && box.max.z <= this.max.z;

		},

		getParameter: function ( point, optionalTarget ) {

			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.

			var result = optionalTarget || new Vector3();

			return result.set(
				( point.x - this.min.x ) / ( this.max.x - this.min.x ),
				( point.y - this.min.y ) / ( this.max.y - this.min.y ),
				( point.z - this.min.z ) / ( this.max.z - this.min.z )
			);

		},

		intersectsBox: function ( box ) {

			// using 6 splitting planes to rule out intersections.
			return box.max.x < this.min.x || box.min.x > this.max.x ||
				box.max.y < this.min.y || box.min.y > this.max.y ||
				box.max.z < this.min.z || box.min.z > this.max.z ? false : true;

		},

		intersectsSphere: ( function () {

			var closestPoint = new Vector3();

			return function intersectsSphere( sphere ) {

				// Find the point on the AABB closest to the sphere center.
				this.clampPoint( sphere.center, closestPoint );

				// If that point is inside the sphere, the AABB and sphere intersect.
				return closestPoint.distanceToSquared( sphere.center ) <= ( sphere.radius * sphere.radius );

			};

		} )(),

		intersectsPlane: function ( plane ) {

			// We compute the minimum and maximum dot product values. If those values
			// are on the same side (back or front) of the plane, then there is no intersection.

			var min, max;

			if ( plane.normal.x > 0 ) {

				min = plane.normal.x * this.min.x;
				max = plane.normal.x * this.max.x;

			} else {

				min = plane.normal.x * this.max.x;
				max = plane.normal.x * this.min.x;

			}

			if ( plane.normal.y > 0 ) {

				min += plane.normal.y * this.min.y;
				max += plane.normal.y * this.max.y;

			} else {

				min += plane.normal.y * this.max.y;
				max += plane.normal.y * this.min.y;

			}

			if ( plane.normal.z > 0 ) {

				min += plane.normal.z * this.min.z;
				max += plane.normal.z * this.max.z;

			} else {

				min += plane.normal.z * this.max.z;
				max += plane.normal.z * this.min.z;

			}

			return ( min <= plane.constant && max >= plane.constant );

		},

		clampPoint: function ( point, optionalTarget ) {

			var result = optionalTarget || new Vector3();
			return result.copy( point ).clamp( this.min, this.max );

		},

		distanceToPoint: function () {

			var v1 = new Vector3();

			return function distanceToPoint( point ) {

				var clampedPoint = v1.copy( point ).clamp( this.min, this.max );
				return clampedPoint.sub( point ).length();

			};

		}(),

		getBoundingSphere: function () {

			var v1 = new Vector3();

			return function getBoundingSphere( optionalTarget ) {

				var result = optionalTarget || new Sphere();

				this.getCenter( result.center );

				result.radius = this.getSize( v1 ).length() * 0.5;

				return result;

			};

		}(),

		intersect: function ( box ) {

			this.min.max( box.min );
			this.max.min( box.max );

			// ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.
			if ( this.isEmpty() ) this.makeEmpty();

			return this;

		},

		union: function ( box ) {

			this.min.min( box.min );
			this.max.max( box.max );

			return this;

		},

		applyMatrix4: function () {

			var points = [
				new Vector3(),
				new Vector3(),
				new Vector3(),
				new Vector3(),
				new Vector3(),
				new Vector3(),
				new Vector3(),
				new Vector3()
			];

			return function applyMatrix4( matrix ) {

				// transform of empty box is an empty box.
				if ( this.isEmpty() ) return this;

				// NOTE: I am using a binary pattern to specify all 2^3 combinations below
				points[ 0 ].set( this.min.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 000
				points[ 1 ].set( this.min.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 001
				points[ 2 ].set( this.min.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 010
				points[ 3 ].set( this.min.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 011
				points[ 4 ].set( this.max.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 100
				points[ 5 ].set( this.max.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 101
				points[ 6 ].set( this.max.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 110
				points[ 7 ].set( this.max.x, this.max.y, this.max.z ).applyMatrix4( matrix );	// 111

				this.setFromPoints( points );

				return this;

			};

		}(),

		translate: function ( offset ) {

			this.min.add( offset );
			this.max.add( offset );

			return this;

		},

		equals: function ( box ) {

			return box.min.equals( this.min ) && box.max.equals( this.max );

		}

	} );

	/**
	 * @author bhouston / http://clara.io
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Sphere( center, radius ) {

		this.center = ( center !== undefined ) ? center : new Vector3();
		this.radius = ( radius !== undefined ) ? radius : 0;

	}

	Object.assign( Sphere.prototype, {

		set: function ( center, radius ) {

			this.center.copy( center );
			this.radius = radius;

			return this;

		},

		setFromPoints: function () {

			var box = new Box3();

			return function setFromPoints( points, optionalCenter ) {

				var center = this.center;

				if ( optionalCenter !== undefined ) {

					center.copy( optionalCenter );

				} else {

					box.setFromPoints( points ).getCenter( center );

				}

				var maxRadiusSq = 0;

				for ( var i = 0, il = points.length; i < il; i ++ ) {

					maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );

				}

				this.radius = Math.sqrt( maxRadiusSq );

				return this;

			};

		}(),

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( sphere ) {

			this.center.copy( sphere.center );
			this.radius = sphere.radius;

			return this;

		},

		empty: function () {

			return ( this.radius <= 0 );

		},

		containsPoint: function ( point ) {

			return ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );

		},

		distanceToPoint: function ( point ) {

			return ( point.distanceTo( this.center ) - this.radius );

		},

		intersectsSphere: function ( sphere ) {

			var radiusSum = this.radius + sphere.radius;

			return sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );

		},

		intersectsBox: function ( box ) {

			return box.intersectsSphere( this );

		},

		intersectsPlane: function ( plane ) {

			return Math.abs( plane.distanceToPoint( this.center ) ) <= this.radius;

		},

		clampPoint: function ( point, optionalTarget ) {

			var deltaLengthSq = this.center.distanceToSquared( point );

			var result = optionalTarget || new Vector3();

			result.copy( point );

			if ( deltaLengthSq > ( this.radius * this.radius ) ) {

				result.sub( this.center ).normalize();
				result.multiplyScalar( this.radius ).add( this.center );

			}

			return result;

		},

		getBoundingBox: function ( optionalTarget ) {

			var box = optionalTarget || new Box3();

			box.set( this.center, this.center );
			box.expandByScalar( this.radius );

			return box;

		},

		applyMatrix4: function ( matrix ) {

			this.center.applyMatrix4( matrix );
			this.radius = this.radius * matrix.getMaxScaleOnAxis();

			return this;

		},

		translate: function ( offset ) {

			this.center.add( offset );

			return this;

		},

		equals: function ( sphere ) {

			return sphere.center.equals( this.center ) && ( sphere.radius === this.radius );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author philogb / http://blog.thejit.org/
	 * @author egraether / http://egraether.com/
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 */

	function Vector2( x, y ) {

		this.x = x || 0;
		this.y = y || 0;

	}

	Object.defineProperties( Vector2.prototype, {

		"width": {

			get: function () {

				return this.x;

			},

			set: function ( value ) {

				this.x = value;

			}

		},

		"height": {

			get: function () {

				return this.y;

			},

			set: function ( value ) {

				this.y = value;

			}

		}

	} );

	Object.assign( Vector2.prototype, {

		isVector2: true,

		set: function ( x, y ) {

			this.x = x;
			this.y = y;

			return this;

		},

		setScalar: function ( scalar ) {

			this.x = scalar;
			this.y = scalar;

			return this;

		},

		setX: function ( x ) {

			this.x = x;

			return this;

		},

		setY: function ( y ) {

			this.y = y;

			return this;

		},

		setComponent: function ( index, value ) {

			switch ( index ) {

				case 0: this.x = value; break;
				case 1: this.y = value; break;
				default: throw new Error( 'index is out of range: ' + index );

			}

			return this;

		},

		getComponent: function ( index ) {

			switch ( index ) {

				case 0: return this.x;
				case 1: return this.y;
				default: throw new Error( 'index is out of range: ' + index );

			}

		},

		clone: function () {

			return new this.constructor( this.x, this.y );

		},

		copy: function ( v ) {

			this.x = v.x;
			this.y = v.y;

			return this;

		},

		add: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );

			}

			this.x += v.x;
			this.y += v.y;

			return this;

		},

		addScalar: function ( s ) {

			this.x += s;
			this.y += s;

			return this;

		},

		addVectors: function ( a, b ) {

			this.x = a.x + b.x;
			this.y = a.y + b.y;

			return this;

		},

		addScaledVector: function ( v, s ) {

			this.x += v.x * s;
			this.y += v.y * s;

			return this;

		},

		sub: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );

			}

			this.x -= v.x;
			this.y -= v.y;

			return this;

		},

		subScalar: function ( s ) {

			this.x -= s;
			this.y -= s;

			return this;

		},

		subVectors: function ( a, b ) {

			this.x = a.x - b.x;
			this.y = a.y - b.y;

			return this;

		},

		multiply: function ( v ) {

			this.x *= v.x;
			this.y *= v.y;

			return this;

		},

		multiplyScalar: function ( scalar ) {

			this.x *= scalar;
			this.y *= scalar;

			return this;

		},

		divide: function ( v ) {

			this.x /= v.x;
			this.y /= v.y;

			return this;

		},

		divideScalar: function ( scalar ) {

			return this.multiplyScalar( 1 / scalar );

		},

		applyMatrix3: function ( m ) {

			var x = this.x, y = this.y;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ];
			this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];

			return this;

		},

		min: function ( v ) {

			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );

			return this;

		},

		max: function ( v ) {

			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );

			return this;

		},

		clamp: function ( min, max ) {

			// assumes min < max, componentwise

			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );

			return this;

		},

		clampScalar: function () {

			var min = new Vector2();
			var max = new Vector2();

			return function clampScalar( minVal, maxVal ) {

				min.set( minVal, minVal );
				max.set( maxVal, maxVal );

				return this.clamp( min, max );

			};

		}(),

		clampLength: function ( min, max ) {

			var length = this.length();

			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );

		},

		floor: function () {

			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );

			return this;

		},

		ceil: function () {

			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );

			return this;

		},

		round: function () {

			this.x = Math.round( this.x );
			this.y = Math.round( this.y );

			return this;

		},

		roundToZero: function () {

			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );

			return this;

		},

		negate: function () {

			this.x = - this.x;
			this.y = - this.y;

			return this;

		},

		dot: function ( v ) {

			return this.x * v.x + this.y * v.y;

		},

		lengthSq: function () {

			return this.x * this.x + this.y * this.y;

		},

		length: function () {

			return Math.sqrt( this.x * this.x + this.y * this.y );

		},

		manhattanLength: function () {

			return Math.abs( this.x ) + Math.abs( this.y );

		},

		normalize: function () {

			return this.divideScalar( this.length() || 1 );

		},

		angle: function () {

			// computes the angle in radians with respect to the positive x-axis

			var angle = Math.atan2( this.y, this.x );

			if ( angle < 0 ) angle += 2 * Math.PI;

			return angle;

		},

		distanceTo: function ( v ) {

			return Math.sqrt( this.distanceToSquared( v ) );

		},

		distanceToSquared: function ( v ) {

			var dx = this.x - v.x, dy = this.y - v.y;
			return dx * dx + dy * dy;

		},

		manhattanDistanceTo: function ( v ) {

			return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );

		},

		setLength: function ( length ) {

			return this.normalize().multiplyScalar( length );

		},

		lerp: function ( v, alpha ) {

			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;

			return this;

		},

		lerpVectors: function ( v1, v2, alpha ) {

			return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );

		},

		equals: function ( v ) {

			return ( ( v.x === this.x ) && ( v.y === this.y ) );

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			this.x = array[ offset ];
			this.y = array[ offset + 1 ];

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;

			return array;

		},

		fromBufferAttribute: function ( attribute, index, offset ) {

			if ( offset !== undefined ) {

				console.warn( 'THREE.Vector2: offset has been removed from .fromBufferAttribute().' );

			}

			this.x = attribute.getX( index );
			this.y = attribute.getY( index );

			return this;

		},

		rotateAround: function ( center, angle ) {

			var c = Math.cos( angle ), s = Math.sin( angle );

			var x = this.x - center.x;
			var y = this.y - center.y;

			this.x = x * c - y * s + center.x;
			this.y = x * s + y * c + center.y;

			return this;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author kile / http://kile.stravaganza.org/
	 * @author alteredq / http://alteredqualia.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author bhouston / http://clara.io
	 */

	var geometryId = 0; // Geometry uses even numbers as Id

	function Geometry() {

		Object.defineProperty( this, 'id', { value: geometryId += 2 } );

		this.uuid = _Math.generateUUID();

		this.name = '';
		this.type = 'Geometry';

		this.vertices = [];
		this.colors = [];
		this.faces = [];
		this.faceVertexUvs = [[]];

		this.morphTargets = [];
		this.morphNormals = [];

		this.skinWeights = [];
		this.skinIndices = [];

		this.lineDistances = [];

		this.boundingBox = null;
		this.boundingSphere = null;

		// update flags

		this.elementsNeedUpdate = false;
		this.verticesNeedUpdate = false;
		this.uvsNeedUpdate = false;
		this.normalsNeedUpdate = false;
		this.colorsNeedUpdate = false;
		this.lineDistancesNeedUpdate = false;
		this.groupsNeedUpdate = false;

	}

	Object.assign( Geometry.prototype, EventDispatcher.prototype, {

		isGeometry: true,

		applyMatrix: function ( matrix ) {

			var normalMatrix = new Matrix3().getNormalMatrix( matrix );

			for ( var i = 0, il = this.vertices.length; i < il; i ++ ) {

				var vertex = this.vertices[ i ];
				vertex.applyMatrix4( matrix );

			}

			for ( var i = 0, il = this.faces.length; i < il; i ++ ) {

				var face = this.faces[ i ];
				face.normal.applyMatrix3( normalMatrix ).normalize();

				for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {

					face.vertexNormals[ j ].applyMatrix3( normalMatrix ).normalize();

				}

			}

			if ( this.boundingBox !== null ) {

				this.computeBoundingBox();

			}

			if ( this.boundingSphere !== null ) {

				this.computeBoundingSphere();

			}

			this.verticesNeedUpdate = true;
			this.normalsNeedUpdate = true;

			return this;

		},

		rotateX: function () {

			// rotate geometry around world x-axis

			var m1 = new Matrix4();

			return function rotateX( angle ) {

				m1.makeRotationX( angle );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		rotateY: function () {

			// rotate geometry around world y-axis

			var m1 = new Matrix4();

			return function rotateY( angle ) {

				m1.makeRotationY( angle );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		rotateZ: function () {

			// rotate geometry around world z-axis

			var m1 = new Matrix4();

			return function rotateZ( angle ) {

				m1.makeRotationZ( angle );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		translate: function () {

			// translate geometry

			var m1 = new Matrix4();

			return function translate( x, y, z ) {

				m1.makeTranslation( x, y, z );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		scale: function () {

			// scale geometry

			var m1 = new Matrix4();

			return function scale( x, y, z ) {

				m1.makeScale( x, y, z );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		lookAt: function () {

			var obj = new Object3D();

			return function lookAt( vector ) {

				obj.lookAt( vector );

				obj.updateMatrix();

				this.applyMatrix( obj.matrix );

			};

		}(),

		fromBufferGeometry: function ( geometry ) {

			var scope = this;

			var indices = geometry.index !== null ? geometry.index.array : undefined;
			var attributes = geometry.attributes;

			var positions = attributes.position.array;
			var normals = attributes.normal !== undefined ? attributes.normal.array : undefined;
			var colors = attributes.color !== undefined ? attributes.color.array : undefined;
			var uvs = attributes.uv !== undefined ? attributes.uv.array : undefined;
			var uvs2 = attributes.uv2 !== undefined ? attributes.uv2.array : undefined;

			if ( uvs2 !== undefined ) this.faceVertexUvs[ 1 ] = [];

			var tempNormals = [];
			var tempUVs = [];
			var tempUVs2 = [];

			for ( var i = 0, j = 0; i < positions.length; i += 3, j += 2 ) {

				scope.vertices.push( new Vector3( positions[ i ], positions[ i + 1 ], positions[ i + 2 ] ) );

				if ( normals !== undefined ) {

					tempNormals.push( new Vector3( normals[ i ], normals[ i + 1 ], normals[ i + 2 ] ) );

				}

				if ( colors !== undefined ) {

					scope.colors.push( new Color( colors[ i ], colors[ i + 1 ], colors[ i + 2 ] ) );

				}

				if ( uvs !== undefined ) {

					tempUVs.push( new Vector2( uvs[ j ], uvs[ j + 1 ] ) );

				}

				if ( uvs2 !== undefined ) {

					tempUVs2.push( new Vector2( uvs2[ j ], uvs2[ j + 1 ] ) );

				}

			}

			function addFace( a, b, c, materialIndex ) {

				var vertexNormals = normals !== undefined ? [ tempNormals[ a ].clone(), tempNormals[ b ].clone(), tempNormals[ c ].clone() ] : [];
				var vertexColors = colors !== undefined ? [ scope.colors[ a ].clone(), scope.colors[ b ].clone(), scope.colors[ c ].clone() ] : [];

				var face = new Face3( a, b, c, vertexNormals, vertexColors, materialIndex );

				scope.faces.push( face );

				if ( uvs !== undefined ) {

					scope.faceVertexUvs[ 0 ].push( [ tempUVs[ a ].clone(), tempUVs[ b ].clone(), tempUVs[ c ].clone() ] );

				}

				if ( uvs2 !== undefined ) {

					scope.faceVertexUvs[ 1 ].push( [ tempUVs2[ a ].clone(), tempUVs2[ b ].clone(), tempUVs2[ c ].clone() ] );

				}

			}

			var groups = geometry.groups;

			if ( groups.length > 0 ) {

				for ( var i = 0; i < groups.length; i ++ ) {

					var group = groups[ i ];

					var start = group.start;
					var count = group.count;

					for ( var j = start, jl = start + count; j < jl; j += 3 ) {

						if ( indices !== undefined ) {

							addFace( indices[ j ], indices[ j + 1 ], indices[ j + 2 ], group.materialIndex );

						} else {

							addFace( j, j + 1, j + 2, group.materialIndex );

						}

					}

				}

			} else {

				if ( indices !== undefined ) {

					for ( var i = 0; i < indices.length; i += 3 ) {

						addFace( indices[ i ], indices[ i + 1 ], indices[ i + 2 ] );

					}

				} else {

					for ( var i = 0; i < positions.length / 3; i += 3 ) {

						addFace( i, i + 1, i + 2 );

					}

				}

			}

			this.computeFaceNormals();

			if ( geometry.boundingBox !== null ) {

				this.boundingBox = geometry.boundingBox.clone();

			}

			if ( geometry.boundingSphere !== null ) {

				this.boundingSphere = geometry.boundingSphere.clone();

			}

			return this;

		},

		center: function () {

			this.computeBoundingBox();

			var offset = this.boundingBox.getCenter().negate();

			this.translate( offset.x, offset.y, offset.z );

			return offset;

		},

		normalize: function () {

			this.computeBoundingSphere();

			var center = this.boundingSphere.center;
			var radius = this.boundingSphere.radius;

			var s = radius === 0 ? 1 : 1.0 / radius;

			var matrix = new Matrix4();
			matrix.set(
				s, 0, 0, - s * center.x,
				0, s, 0, - s * center.y,
				0, 0, s, - s * center.z,
				0, 0, 0, 1
			);

			this.applyMatrix( matrix );

			return this;

		},

		computeFaceNormals: function () {

			var cb = new Vector3(), ab = new Vector3();

			for ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {

				var face = this.faces[ f ];

				var vA = this.vertices[ face.a ];
				var vB = this.vertices[ face.b ];
				var vC = this.vertices[ face.c ];

				cb.subVectors( vC, vB );
				ab.subVectors( vA, vB );
				cb.cross( ab );

				cb.normalize();

				face.normal.copy( cb );

			}

		},

		computeVertexNormals: function ( areaWeighted ) {

			if ( areaWeighted === undefined ) areaWeighted = true;

			var v, vl, f, fl, face, vertices;

			vertices = new Array( this.vertices.length );

			for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

				vertices[ v ] = new Vector3();

			}

			if ( areaWeighted ) {

				// vertex normals weighted by triangle areas
				// http://www.iquilezles.org/www/articles/normals/normals.htm

				var vA, vB, vC;
				var cb = new Vector3(), ab = new Vector3();

				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

					face = this.faces[ f ];

					vA = this.vertices[ face.a ];
					vB = this.vertices[ face.b ];
					vC = this.vertices[ face.c ];

					cb.subVectors( vC, vB );
					ab.subVectors( vA, vB );
					cb.cross( ab );

					vertices[ face.a ].add( cb );
					vertices[ face.b ].add( cb );
					vertices[ face.c ].add( cb );

				}

			} else {

				this.computeFaceNormals();

				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

					face = this.faces[ f ];

					vertices[ face.a ].add( face.normal );
					vertices[ face.b ].add( face.normal );
					vertices[ face.c ].add( face.normal );

				}

			}

			for ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {

				vertices[ v ].normalize();

			}

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				var vertexNormals = face.vertexNormals;

				if ( vertexNormals.length === 3 ) {

					vertexNormals[ 0 ].copy( vertices[ face.a ] );
					vertexNormals[ 1 ].copy( vertices[ face.b ] );
					vertexNormals[ 2 ].copy( vertices[ face.c ] );

				} else {

					vertexNormals[ 0 ] = vertices[ face.a ].clone();
					vertexNormals[ 1 ] = vertices[ face.b ].clone();
					vertexNormals[ 2 ] = vertices[ face.c ].clone();

				}

			}

			if ( this.faces.length > 0 ) {

				this.normalsNeedUpdate = true;

			}

		},

		computeFlatVertexNormals: function () {

			var f, fl, face;

			this.computeFaceNormals();

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				var vertexNormals = face.vertexNormals;

				if ( vertexNormals.length === 3 ) {

					vertexNormals[ 0 ].copy( face.normal );
					vertexNormals[ 1 ].copy( face.normal );
					vertexNormals[ 2 ].copy( face.normal );

				} else {

					vertexNormals[ 0 ] = face.normal.clone();
					vertexNormals[ 1 ] = face.normal.clone();
					vertexNormals[ 2 ] = face.normal.clone();

				}

			}

			if ( this.faces.length > 0 ) {

				this.normalsNeedUpdate = true;

			}

		},

		computeMorphNormals: function () {

			var i, il, f, fl, face;

			// save original normals
			// - create temp variables on first access
			//   otherwise just copy (for faster repeated calls)

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				if ( ! face.__originalFaceNormal ) {

					face.__originalFaceNormal = face.normal.clone();

				} else {

					face.__originalFaceNormal.copy( face.normal );

				}

				if ( ! face.__originalVertexNormals ) face.__originalVertexNormals = [];

				for ( i = 0, il = face.vertexNormals.length; i < il; i ++ ) {

					if ( ! face.__originalVertexNormals[ i ] ) {

						face.__originalVertexNormals[ i ] = face.vertexNormals[ i ].clone();

					} else {

						face.__originalVertexNormals[ i ].copy( face.vertexNormals[ i ] );

					}

				}

			}

			// use temp geometry to compute face and vertex normals for each morph

			var tmpGeo = new Geometry();
			tmpGeo.faces = this.faces;

			for ( i = 0, il = this.morphTargets.length; i < il; i ++ ) {

				// create on first access

				if ( ! this.morphNormals[ i ] ) {

					this.morphNormals[ i ] = {};
					this.morphNormals[ i ].faceNormals = [];
					this.morphNormals[ i ].vertexNormals = [];

					var dstNormalsFace = this.morphNormals[ i ].faceNormals;
					var dstNormalsVertex = this.morphNormals[ i ].vertexNormals;

					var faceNormal, vertexNormals;

					for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

						faceNormal = new Vector3();
						vertexNormals = { a: new Vector3(), b: new Vector3(), c: new Vector3() };

						dstNormalsFace.push( faceNormal );
						dstNormalsVertex.push( vertexNormals );

					}

				}

				var morphNormals = this.morphNormals[ i ];

				// set vertices to morph target

				tmpGeo.vertices = this.morphTargets[ i ].vertices;

				// compute morph normals

				tmpGeo.computeFaceNormals();
				tmpGeo.computeVertexNormals();

				// store morph normals

				var faceNormal, vertexNormals;

				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

					face = this.faces[ f ];

					faceNormal = morphNormals.faceNormals[ f ];
					vertexNormals = morphNormals.vertexNormals[ f ];

					faceNormal.copy( face.normal );

					vertexNormals.a.copy( face.vertexNormals[ 0 ] );
					vertexNormals.b.copy( face.vertexNormals[ 1 ] );
					vertexNormals.c.copy( face.vertexNormals[ 2 ] );

				}

			}

			// restore original normals

			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {

				face = this.faces[ f ];

				face.normal = face.__originalFaceNormal;
				face.vertexNormals = face.__originalVertexNormals;

			}

		},

		computeLineDistances: function () {

			var d = 0;
			var vertices = this.vertices;

			for ( var i = 0, il = vertices.length; i < il; i ++ ) {

				if ( i > 0 ) {

					d += vertices[ i ].distanceTo( vertices[ i - 1 ] );

				}

				this.lineDistances[ i ] = d;

			}

		},

		computeBoundingBox: function () {

			if ( this.boundingBox === null ) {

				this.boundingBox = new Box3();

			}

			this.boundingBox.setFromPoints( this.vertices );

		},

		computeBoundingSphere: function () {

			if ( this.boundingSphere === null ) {

				this.boundingSphere = new Sphere();

			}

			this.boundingSphere.setFromPoints( this.vertices );

		},

		merge: function ( geometry, matrix, materialIndexOffset ) {

			if ( ! ( geometry && geometry.isGeometry ) ) {

				console.error( 'THREE.Geometry.merge(): geometry not an instance of THREE.Geometry.', geometry );
				return;

			}

			var normalMatrix,
				vertexOffset = this.vertices.length,
				vertices1 = this.vertices,
				vertices2 = geometry.vertices,
				faces1 = this.faces,
				faces2 = geometry.faces,
				uvs1 = this.faceVertexUvs[ 0 ],
				uvs2 = geometry.faceVertexUvs[ 0 ],
				colors1 = this.colors,
				colors2 = geometry.colors;

			if ( materialIndexOffset === undefined ) materialIndexOffset = 0;

			if ( matrix !== undefined ) {

				normalMatrix = new Matrix3().getNormalMatrix( matrix );

			}

			// vertices

			for ( var i = 0, il = vertices2.length; i < il; i ++ ) {

				var vertex = vertices2[ i ];

				var vertexCopy = vertex.clone();

				if ( matrix !== undefined ) vertexCopy.applyMatrix4( matrix );

				vertices1.push( vertexCopy );

			}

			// colors

			for ( var i = 0, il = colors2.length; i < il; i ++ ) {

				colors1.push( colors2[ i ].clone() );

			}

			// faces

			for ( i = 0, il = faces2.length; i < il; i ++ ) {

				var face = faces2[ i ], faceCopy, normal, color,
					faceVertexNormals = face.vertexNormals,
					faceVertexColors = face.vertexColors;

				faceCopy = new Face3( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset );
				faceCopy.normal.copy( face.normal );

				if ( normalMatrix !== undefined ) {

					faceCopy.normal.applyMatrix3( normalMatrix ).normalize();

				}

				for ( var j = 0, jl = faceVertexNormals.length; j < jl; j ++ ) {

					normal = faceVertexNormals[ j ].clone();

					if ( normalMatrix !== undefined ) {

						normal.applyMatrix3( normalMatrix ).normalize();

					}

					faceCopy.vertexNormals.push( normal );

				}

				faceCopy.color.copy( face.color );

				for ( var j = 0, jl = faceVertexColors.length; j < jl; j ++ ) {

					color = faceVertexColors[ j ];
					faceCopy.vertexColors.push( color.clone() );

				}

				faceCopy.materialIndex = face.materialIndex + materialIndexOffset;

				faces1.push( faceCopy );

			}

			// uvs

			for ( i = 0, il = uvs2.length; i < il; i ++ ) {

				var uv = uvs2[ i ], uvCopy = [];

				if ( uv === undefined ) {

					continue;

				}

				for ( var j = 0, jl = uv.length; j < jl; j ++ ) {

					uvCopy.push( uv[ j ].clone() );

				}

				uvs1.push( uvCopy );

			}

		},

		mergeMesh: function ( mesh ) {

			if ( ! ( mesh && mesh.isMesh ) ) {

				console.error( 'THREE.Geometry.mergeMesh(): mesh not an instance of THREE.Mesh.', mesh );
				return;

			}

			mesh.matrixAutoUpdate && mesh.updateMatrix();

			this.merge( mesh.geometry, mesh.matrix );

		},

		/*
		 * Checks for duplicate vertices with hashmap.
		 * Duplicated vertices are removed
		 * and faces' vertices are updated.
		 */

		mergeVertices: function () {

			var verticesMap = {}; // Hashmap for looking up vertices by position coordinates (and making sure they are unique)
			var unique = [], changes = [];

			var v, key;
			var precisionPoints = 4; // number of decimal points, e.g. 4 for epsilon of 0.0001
			var precision = Math.pow( 10, precisionPoints );
			var i, il, face;
			var indices, j, jl;

			for ( i = 0, il = this.vertices.length; i < il; i ++ ) {

				v = this.vertices[ i ];
				key = Math.round( v.x * precision ) + '_' + Math.round( v.y * precision ) + '_' + Math.round( v.z * precision );

				if ( verticesMap[ key ] === undefined ) {

					verticesMap[ key ] = i;
					unique.push( this.vertices[ i ] );
					changes[ i ] = unique.length - 1;

				} else {

					//console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);
					changes[ i ] = changes[ verticesMap[ key ] ];

				}

			}


			// if faces are completely degenerate after merging vertices, we
			// have to remove them from the geometry.
			var faceIndicesToRemove = [];

			for ( i = 0, il = this.faces.length; i < il; i ++ ) {

				face = this.faces[ i ];

				face.a = changes[ face.a ];
				face.b = changes[ face.b ];
				face.c = changes[ face.c ];

				indices = [ face.a, face.b, face.c ];

				// if any duplicate vertices are found in a Face3
				// we have to remove the face as nothing can be saved
				for ( var n = 0; n < 3; n ++ ) {

					if ( indices[ n ] === indices[ ( n + 1 ) % 3 ] ) {

						faceIndicesToRemove.push( i );
						break;

					}

				}

			}

			for ( i = faceIndicesToRemove.length - 1; i >= 0; i -- ) {

				var idx = faceIndicesToRemove[ i ];

				this.faces.splice( idx, 1 );

				for ( j = 0, jl = this.faceVertexUvs.length; j < jl; j ++ ) {

					this.faceVertexUvs[ j ].splice( idx, 1 );

				}

			}

			// Use unique set of vertices

			var diff = this.vertices.length - unique.length;
			this.vertices = unique;
			return diff;

		},

		setFromPoints: function ( points ) {

			this.vertices = [];

			for ( var i = 0, l = points.length; i < l; i ++ ) {

				var point = points[ i ];
				this.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );

			}

			return this;

		},

		sortFacesByMaterialIndex: function () {

			var faces = this.faces;
			var length = faces.length;

			// tag faces

			for ( var i = 0; i < length; i ++ ) {

				faces[ i ]._id = i;

			}

			// sort faces

			function materialIndexSort( a, b ) {

				return a.materialIndex - b.materialIndex;

			}

			faces.sort( materialIndexSort );

			// sort uvs

			var uvs1 = this.faceVertexUvs[ 0 ];
			var uvs2 = this.faceVertexUvs[ 1 ];

			var newUvs1, newUvs2;

			if ( uvs1 && uvs1.length === length ) newUvs1 = [];
			if ( uvs2 && uvs2.length === length ) newUvs2 = [];

			for ( var i = 0; i < length; i ++ ) {

				var id = faces[ i ]._id;

				if ( newUvs1 ) newUvs1.push( uvs1[ id ] );
				if ( newUvs2 ) newUvs2.push( uvs2[ id ] );

			}

			if ( newUvs1 ) this.faceVertexUvs[ 0 ] = newUvs1;
			if ( newUvs2 ) this.faceVertexUvs[ 1 ] = newUvs2;

		},

		toJSON: function () {

			var data = {
				metadata: {
					version: 4.5,
					type: 'Geometry',
					generator: 'Geometry.toJSON'
				}
			};

			// standard Geometry serialization

			data.uuid = this.uuid;
			data.type = this.type;
			if ( this.name !== '' ) data.name = this.name;

			if ( this.parameters !== undefined ) {

				var parameters = this.parameters;

				for ( var key in parameters ) {

					if ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];

				}

				return data;

			}

			var vertices = [];

			for ( var i = 0; i < this.vertices.length; i ++ ) {

				var vertex = this.vertices[ i ];
				vertices.push( vertex.x, vertex.y, vertex.z );

			}

			var faces = [];
			var normals = [];
			var normalsHash = {};
			var colors = [];
			var colorsHash = {};
			var uvs = [];
			var uvsHash = {};

			for ( var i = 0; i < this.faces.length; i ++ ) {

				var face = this.faces[ i ];

				var hasMaterial = true;
				var hasFaceUv = false; // deprecated
				var hasFaceVertexUv = this.faceVertexUvs[ 0 ][ i ] !== undefined;
				var hasFaceNormal = face.normal.length() > 0;
				var hasFaceVertexNormal = face.vertexNormals.length > 0;
				var hasFaceColor = face.color.r !== 1 || face.color.g !== 1 || face.color.b !== 1;
				var hasFaceVertexColor = face.vertexColors.length > 0;

				var faceType = 0;

				faceType = setBit( faceType, 0, 0 ); // isQuad
				faceType = setBit( faceType, 1, hasMaterial );
				faceType = setBit( faceType, 2, hasFaceUv );
				faceType = setBit( faceType, 3, hasFaceVertexUv );
				faceType = setBit( faceType, 4, hasFaceNormal );
				faceType = setBit( faceType, 5, hasFaceVertexNormal );
				faceType = setBit( faceType, 6, hasFaceColor );
				faceType = setBit( faceType, 7, hasFaceVertexColor );

				faces.push( faceType );
				faces.push( face.a, face.b, face.c );
				faces.push( face.materialIndex );

				if ( hasFaceVertexUv ) {

					var faceVertexUvs = this.faceVertexUvs[ 0 ][ i ];

					faces.push(
						getUvIndex( faceVertexUvs[ 0 ] ),
						getUvIndex( faceVertexUvs[ 1 ] ),
						getUvIndex( faceVertexUvs[ 2 ] )
					);

				}

				if ( hasFaceNormal ) {

					faces.push( getNormalIndex( face.normal ) );

				}

				if ( hasFaceVertexNormal ) {

					var vertexNormals = face.vertexNormals;

					faces.push(
						getNormalIndex( vertexNormals[ 0 ] ),
						getNormalIndex( vertexNormals[ 1 ] ),
						getNormalIndex( vertexNormals[ 2 ] )
					);

				}

				if ( hasFaceColor ) {

					faces.push( getColorIndex( face.color ) );

				}

				if ( hasFaceVertexColor ) {

					var vertexColors = face.vertexColors;

					faces.push(
						getColorIndex( vertexColors[ 0 ] ),
						getColorIndex( vertexColors[ 1 ] ),
						getColorIndex( vertexColors[ 2 ] )
					);

				}

			}

			function setBit( value, position, enabled ) {

				return enabled ? value | ( 1 << position ) : value & ( ~ ( 1 << position ) );

			}

			function getNormalIndex( normal ) {

				var hash = normal.x.toString() + normal.y.toString() + normal.z.toString();

				if ( normalsHash[ hash ] !== undefined ) {

					return normalsHash[ hash ];

				}

				normalsHash[ hash ] = normals.length / 3;
				normals.push( normal.x, normal.y, normal.z );

				return normalsHash[ hash ];

			}

			function getColorIndex( color ) {

				var hash = color.r.toString() + color.g.toString() + color.b.toString();

				if ( colorsHash[ hash ] !== undefined ) {

					return colorsHash[ hash ];

				}

				colorsHash[ hash ] = colors.length;
				colors.push( color.getHex() );

				return colorsHash[ hash ];

			}

			function getUvIndex( uv ) {

				var hash = uv.x.toString() + uv.y.toString();

				if ( uvsHash[ hash ] !== undefined ) {

					return uvsHash[ hash ];

				}

				uvsHash[ hash ] = uvs.length / 2;
				uvs.push( uv.x, uv.y );

				return uvsHash[ hash ];

			}

			data.data = {};

			data.data.vertices = vertices;
			data.data.normals = normals;
			if ( colors.length > 0 ) data.data.colors = colors;
			if ( uvs.length > 0 ) data.data.uvs = [ uvs ]; // temporal backward compatibility
			data.data.faces = faces;

			return data;

		},

		clone: function () {

			/*
			 // Handle primitives

			 var parameters = this.parameters;

			 if ( parameters !== undefined ) {

			 var values = [];

			 for ( var key in parameters ) {

			 values.push( parameters[ key ] );

			 }

			 var geometry = Object.create( this.constructor.prototype );
			 this.constructor.apply( geometry, values );
			 return geometry;

			 }

			 return new this.constructor().copy( this );
			 */

			return new Geometry().copy( this );

		},

		copy: function ( source ) {

			var i, il, j, jl, k, kl;

			// reset

			this.vertices = [];
			this.colors = [];
			this.faces = [];
			this.faceVertexUvs = [[]];
			this.morphTargets = [];
			this.morphNormals = [];
			this.skinWeights = [];
			this.skinIndices = [];
			this.lineDistances = [];
			this.boundingBox = null;
			this.boundingSphere = null;

			// name

			this.name = source.name;

			// vertices

			var vertices = source.vertices;

			for ( i = 0, il = vertices.length; i < il; i ++ ) {

				this.vertices.push( vertices[ i ].clone() );

			}

			// colors

			var colors = source.colors;

			for ( i = 0, il = colors.length; i < il; i ++ ) {

				this.colors.push( colors[ i ].clone() );

			}

			// faces

			var faces = source.faces;

			for ( i = 0, il = faces.length; i < il; i ++ ) {

				this.faces.push( faces[ i ].clone() );

			}

			// face vertex uvs

			for ( i = 0, il = source.faceVertexUvs.length; i < il; i ++ ) {

				var faceVertexUvs = source.faceVertexUvs[ i ];

				if ( this.faceVertexUvs[ i ] === undefined ) {

					this.faceVertexUvs[ i ] = [];

				}

				for ( j = 0, jl = faceVertexUvs.length; j < jl; j ++ ) {

					var uvs = faceVertexUvs[ j ], uvsCopy = [];

					for ( k = 0, kl = uvs.length; k < kl; k ++ ) {

						var uv = uvs[ k ];

						uvsCopy.push( uv.clone() );

					}

					this.faceVertexUvs[ i ].push( uvsCopy );

				}

			}

			// morph targets

			var morphTargets = source.morphTargets;

			for ( i = 0, il = morphTargets.length; i < il; i ++ ) {

				var morphTarget = {};
				morphTarget.name = morphTargets[ i ].name;

				// vertices

				if ( morphTargets[ i ].vertices !== undefined ) {

					morphTarget.vertices = [];

					for ( j = 0, jl = morphTargets[ i ].vertices.length; j < jl; j ++ ) {

						morphTarget.vertices.push( morphTargets[ i ].vertices[ j ].clone() );

					}

				}

				// normals

				if ( morphTargets[ i ].normals !== undefined ) {

					morphTarget.normals = [];

					for ( j = 0, jl = morphTargets[ i ].normals.length; j < jl; j ++ ) {

						morphTarget.normals.push( morphTargets[ i ].normals[ j ].clone() );

					}

				}

				this.morphTargets.push( morphTarget );

			}

			// morph normals

			var morphNormals = source.morphNormals;

			for ( i = 0, il = morphNormals.length; i < il; i ++ ) {

				var morphNormal = {};

				// vertex normals

				if ( morphNormals[ i ].vertexNormals !== undefined ) {

					morphNormal.vertexNormals = [];

					for ( j = 0, jl = morphNormals[ i ].vertexNormals.length; j < jl; j ++ ) {

						var srcVertexNormal = morphNormals[ i ].vertexNormals[ j ];
						var destVertexNormal = {};

						destVertexNormal.a = srcVertexNormal.a.clone();
						destVertexNormal.b = srcVertexNormal.b.clone();
						destVertexNormal.c = srcVertexNormal.c.clone();

						morphNormal.vertexNormals.push( destVertexNormal );

					}

				}

				// face normals

				if ( morphNormals[ i ].faceNormals !== undefined ) {

					morphNormal.faceNormals = [];

					for ( j = 0, jl = morphNormals[ i ].faceNormals.length; j < jl; j ++ ) {

						morphNormal.faceNormals.push( morphNormals[ i ].faceNormals[ j ].clone() );

					}

				}

				this.morphNormals.push( morphNormal );

			}

			// skin weights

			var skinWeights = source.skinWeights;

			for ( i = 0, il = skinWeights.length; i < il; i ++ ) {

				this.skinWeights.push( skinWeights[ i ].clone() );

			}

			// skin indices

			var skinIndices = source.skinIndices;

			for ( i = 0, il = skinIndices.length; i < il; i ++ ) {

				this.skinIndices.push( skinIndices[ i ].clone() );

			}

			// line distances

			var lineDistances = source.lineDistances;

			for ( i = 0, il = lineDistances.length; i < il; i ++ ) {

				this.lineDistances.push( lineDistances[ i ] );

			}

			// bounding box

			var boundingBox = source.boundingBox;

			if ( boundingBox !== null ) {

				this.boundingBox = boundingBox.clone();

			}

			// bounding sphere

			var boundingSphere = source.boundingSphere;

			if ( boundingSphere !== null ) {

				this.boundingSphere = boundingSphere.clone();

			}

			// update flags

			this.elementsNeedUpdate = source.elementsNeedUpdate;
			this.verticesNeedUpdate = source.verticesNeedUpdate;
			this.uvsNeedUpdate = source.uvsNeedUpdate;
			this.normalsNeedUpdate = source.normalsNeedUpdate;
			this.colorsNeedUpdate = source.colorsNeedUpdate;
			this.lineDistancesNeedUpdate = source.lineDistancesNeedUpdate;
			this.groupsNeedUpdate = source.groupsNeedUpdate;

			return this;

		},

		dispose: function () {

			this.dispatchEvent( { type: 'dispose' } );

		}

	} );

	/**
	 * @author supereggbert / http://www.paulbrunt.co.uk/
	 * @author philogb / http://blog.thejit.org/
	 * @author mikael emtinger / http://gomo.se/
	 * @author egraether / http://egraether.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */

	function Vector4( x, y, z, w ) {

		this.x = x || 0;
		this.y = y || 0;
		this.z = z || 0;
		this.w = ( w !== undefined ) ? w : 1;

	}

	Object.assign( Vector4.prototype, {

		isVector4: true,

		set: function ( x, y, z, w ) {

			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;

			return this;

		},

		setScalar: function ( scalar ) {

			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			this.w = scalar;

			return this;

		},

		setX: function ( x ) {

			this.x = x;

			return this;

		},

		setY: function ( y ) {

			this.y = y;

			return this;

		},

		setZ: function ( z ) {

			this.z = z;

			return this;

		},

		setW: function ( w ) {

			this.w = w;

			return this;

		},

		setComponent: function ( index, value ) {

			switch ( index ) {

				case 0: this.x = value; break;
				case 1: this.y = value; break;
				case 2: this.z = value; break;
				case 3: this.w = value; break;
				default: throw new Error( 'index is out of range: ' + index );

			}

			return this;

		},

		getComponent: function ( index ) {

			switch ( index ) {

				case 0: return this.x;
				case 1: return this.y;
				case 2: return this.z;
				case 3: return this.w;
				default: throw new Error( 'index is out of range: ' + index );

			}

		},

		clone: function () {

			return new this.constructor( this.x, this.y, this.z, this.w );

		},

		copy: function ( v ) {

			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			this.w = ( v.w !== undefined ) ? v.w : 1;

			return this;

		},

		add: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );
				return this.addVectors( v, w );

			}

			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			this.w += v.w;

			return this;

		},

		addScalar: function ( s ) {

			this.x += s;
			this.y += s;
			this.z += s;
			this.w += s;

			return this;

		},

		addVectors: function ( a, b ) {

			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			this.w = a.w + b.w;

			return this;

		},

		addScaledVector: function ( v, s ) {

			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			this.w += v.w * s;

			return this;

		},

		sub: function ( v, w ) {

			if ( w !== undefined ) {

				console.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );
				return this.subVectors( v, w );

			}

			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			this.w -= v.w;

			return this;

		},

		subScalar: function ( s ) {

			this.x -= s;
			this.y -= s;
			this.z -= s;
			this.w -= s;

			return this;

		},

		subVectors: function ( a, b ) {

			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			this.w = a.w - b.w;

			return this;

		},

		multiplyScalar: function ( scalar ) {

			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			this.w *= scalar;

			return this;

		},

		applyMatrix4: function ( m ) {

			var x = this.x, y = this.y, z = this.z, w = this.w;
			var e = m.elements;

			this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w;
			this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w;
			this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w;
			this.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w;

			return this;

		},

		divideScalar: function ( scalar ) {

			return this.multiplyScalar( 1 / scalar );

		},

		setAxisAngleFromQuaternion: function ( q ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm

			// q is assumed to be normalized

			this.w = 2 * Math.acos( q.w );

			var s = Math.sqrt( 1 - q.w * q.w );

			if ( s < 0.0001 ) {

				this.x = 1;
				this.y = 0;
				this.z = 0;

			} else {

				this.x = q.x / s;
				this.y = q.y / s;
				this.z = q.z / s;

			}

			return this;

		},

		setAxisAngleFromRotationMatrix: function ( m ) {

			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm

			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)

			var angle, x, y, z,		// variables for result
				epsilon = 0.01,		// margin to allow for rounding errors
				epsilon2 = 0.1,		// margin to distinguish between 0 and 180 degrees

				te = m.elements,

				m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],
				m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],
				m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];

			if ( ( Math.abs( m12 - m21 ) < epsilon ) &&
			     ( Math.abs( m13 - m31 ) < epsilon ) &&
			     ( Math.abs( m23 - m32 ) < epsilon ) ) {

				// singularity found
				// first check for identity matrix which must have +1 for all terms
				// in leading diagonal and zero in other terms

				if ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&
				     ( Math.abs( m13 + m31 ) < epsilon2 ) &&
				     ( Math.abs( m23 + m32 ) < epsilon2 ) &&
				     ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {

					// this singularity is identity matrix so angle = 0

					this.set( 1, 0, 0, 0 );

					return this; // zero angle, arbitrary axis

				}

				// otherwise this singularity is angle = 180

				angle = Math.PI;

				var xx = ( m11 + 1 ) / 2;
				var yy = ( m22 + 1 ) / 2;
				var zz = ( m33 + 1 ) / 2;
				var xy = ( m12 + m21 ) / 4;
				var xz = ( m13 + m31 ) / 4;
				var yz = ( m23 + m32 ) / 4;

				if ( ( xx > yy ) && ( xx > zz ) ) {

					// m11 is the largest diagonal term

					if ( xx < epsilon ) {

						x = 0;
						y = 0.707106781;
						z = 0.707106781;

					} else {

						x = Math.sqrt( xx );
						y = xy / x;
						z = xz / x;

					}

				} else if ( yy > zz ) {

					// m22 is the largest diagonal term

					if ( yy < epsilon ) {

						x = 0.707106781;
						y = 0;
						z = 0.707106781;

					} else {

						y = Math.sqrt( yy );
						x = xy / y;
						z = yz / y;

					}

				} else {

					// m33 is the largest diagonal term so base result on this

					if ( zz < epsilon ) {

						x = 0.707106781;
						y = 0.707106781;
						z = 0;

					} else {

						z = Math.sqrt( zz );
						x = xz / z;
						y = yz / z;

					}

				}

				this.set( x, y, z, angle );

				return this; // return 180 deg rotation

			}

			// as we have reached here there are no singularities so we can handle normally

			var s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +
			                   ( m13 - m31 ) * ( m13 - m31 ) +
			                   ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize

			if ( Math.abs( s ) < 0.001 ) s = 1;

			// prevent divide by zero, should not happen if matrix is orthogonal and should be
			// caught by singularity test above, but I've left it in just in case

			this.x = ( m32 - m23 ) / s;
			this.y = ( m13 - m31 ) / s;
			this.z = ( m21 - m12 ) / s;
			this.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );

			return this;

		},

		min: function ( v ) {

			this.x = Math.min( this.x, v.x );
			this.y = Math.min( this.y, v.y );
			this.z = Math.min( this.z, v.z );
			this.w = Math.min( this.w, v.w );

			return this;

		},

		max: function ( v ) {

			this.x = Math.max( this.x, v.x );
			this.y = Math.max( this.y, v.y );
			this.z = Math.max( this.z, v.z );
			this.w = Math.max( this.w, v.w );

			return this;

		},

		clamp: function ( min, max ) {

			// assumes min < max, componentwise

			this.x = Math.max( min.x, Math.min( max.x, this.x ) );
			this.y = Math.max( min.y, Math.min( max.y, this.y ) );
			this.z = Math.max( min.z, Math.min( max.z, this.z ) );
			this.w = Math.max( min.w, Math.min( max.w, this.w ) );

			return this;

		},

		clampScalar: function () {

			var min, max;

			return function clampScalar( minVal, maxVal ) {

				if ( min === undefined ) {

					min = new Vector4();
					max = new Vector4();

				}

				min.set( minVal, minVal, minVal, minVal );
				max.set( maxVal, maxVal, maxVal, maxVal );

				return this.clamp( min, max );

			};

		}(),

		clampLength: function ( min, max ) {

			var length = this.length();

			return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );

		},

		floor: function () {

			this.x = Math.floor( this.x );
			this.y = Math.floor( this.y );
			this.z = Math.floor( this.z );
			this.w = Math.floor( this.w );

			return this;

		},

		ceil: function () {

			this.x = Math.ceil( this.x );
			this.y = Math.ceil( this.y );
			this.z = Math.ceil( this.z );
			this.w = Math.ceil( this.w );

			return this;

		},

		round: function () {

			this.x = Math.round( this.x );
			this.y = Math.round( this.y );
			this.z = Math.round( this.z );
			this.w = Math.round( this.w );

			return this;

		},

		roundToZero: function () {

			this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );
			this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );
			this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );
			this.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w );

			return this;

		},

		negate: function () {

			this.x = - this.x;
			this.y = - this.y;
			this.z = - this.z;
			this.w = - this.w;

			return this;

		},

		dot: function ( v ) {

			return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;

		},

		lengthSq: function () {

			return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;

		},

		length: function () {

			return Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );

		},

		manhattanLength: function () {

			return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );

		},

		normalize: function () {

			return this.divideScalar( this.length() || 1 );

		},

		setLength: function ( length ) {

			return this.normalize().multiplyScalar( length );

		},

		lerp: function ( v, alpha ) {

			this.x += ( v.x - this.x ) * alpha;
			this.y += ( v.y - this.y ) * alpha;
			this.z += ( v.z - this.z ) * alpha;
			this.w += ( v.w - this.w ) * alpha;

			return this;

		},

		lerpVectors: function ( v1, v2, alpha ) {

			return this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );

		},

		equals: function ( v ) {

			return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) );

		},

		fromArray: function ( array, offset ) {

			if ( offset === undefined ) offset = 0;

			this.x = array[ offset ];
			this.y = array[ offset + 1 ];
			this.z = array[ offset + 2 ];
			this.w = array[ offset + 3 ];

			return this;

		},

		toArray: function ( array, offset ) {

			if ( array === undefined ) array = [];
			if ( offset === undefined ) offset = 0;

			array[ offset ] = this.x;
			array[ offset + 1 ] = this.y;
			array[ offset + 2 ] = this.z;
			array[ offset + 3 ] = this.w;

			return array;

		},

		fromBufferAttribute: function ( attribute, index, offset ) {

			if ( offset !== undefined ) {

				console.warn( 'THREE.Vector4: offset has been removed from .fromBufferAttribute().' );

			}

			this.x = attribute.getX( index );
			this.y = attribute.getY( index );
			this.z = attribute.getZ( index );
			this.w = attribute.getW( index );

			return this;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function BufferAttribute( array, itemSize, normalized ) {

		if ( Array.isArray( array ) ) {

			throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );

		}

		this.uuid = _Math.generateUUID();
		this.name = '';

		this.array = array;
		this.itemSize = itemSize;
		this.count = array !== undefined ? array.length / itemSize : 0;
		this.normalized = normalized === true;

		this.dynamic = false;
		this.updateRange = { offset: 0, count: - 1 };

		this.onUploadCallback = function () {};

		this.version = 0;

	}

	Object.defineProperty( BufferAttribute.prototype, 'needsUpdate', {

		set: function ( value ) {

			if ( value === true ) this.version ++;

		}

	} );

	Object.assign( BufferAttribute.prototype, {

		isBufferAttribute: true,

		setArray: function ( array ) {

			if ( Array.isArray( array ) ) {

				throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );

			}

			this.count = array !== undefined ? array.length / this.itemSize : 0;
			this.array = array;

		},

		setDynamic: function ( value ) {

			this.dynamic = value;

			return this;

		},

		copy: function ( source ) {

			this.array = new source.array.constructor( source.array );
			this.itemSize = source.itemSize;
			this.count = source.count;
			this.normalized = source.normalized;

			this.dynamic = source.dynamic;

			return this;

		},

		copyAt: function ( index1, attribute, index2 ) {

			index1 *= this.itemSize;
			index2 *= attribute.itemSize;

			for ( var i = 0, l = this.itemSize; i < l; i ++ ) {

				this.array[ index1 + i ] = attribute.array[ index2 + i ];

			}

			return this;

		},

		copyArray: function ( array ) {

			this.array.set( array );

			return this;

		},

		copyColorsArray: function ( colors ) {

			var array = this.array, offset = 0;

			for ( var i = 0, l = colors.length; i < l; i ++ ) {

				var color = colors[ i ];

				if ( color === undefined ) {

					console.warn( 'THREE.BufferAttribute.copyColorsArray(): color is undefined', i );
					color = new Color();

				}

				array[ offset ++ ] = color.r;
				array[ offset ++ ] = color.g;
				array[ offset ++ ] = color.b;

			}

			return this;

		},

		copyIndicesArray: function ( indices ) {

			var array = this.array, offset = 0;

			for ( var i = 0, l = indices.length; i < l; i ++ ) {

				var index = indices[ i ];

				array[ offset ++ ] = index.a;
				array[ offset ++ ] = index.b;
				array[ offset ++ ] = index.c;

			}

			return this;

		},

		copyVector2sArray: function ( vectors ) {

			var array = this.array, offset = 0;

			for ( var i = 0, l = vectors.length; i < l; i ++ ) {

				var vector = vectors[ i ];

				if ( vector === undefined ) {

					console.warn( 'THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i );
					vector = new Vector2();

				}

				array[ offset ++ ] = vector.x;
				array[ offset ++ ] = vector.y;

			}

			return this;

		},

		copyVector3sArray: function ( vectors ) {

			var array = this.array, offset = 0;

			for ( var i = 0, l = vectors.length; i < l; i ++ ) {

				var vector = vectors[ i ];

				if ( vector === undefined ) {

					console.warn( 'THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i );
					vector = new Vector3();

				}

				array[ offset ++ ] = vector.x;
				array[ offset ++ ] = vector.y;
				array[ offset ++ ] = vector.z;

			}

			return this;

		},

		copyVector4sArray: function ( vectors ) {

			var array = this.array, offset = 0;

			for ( var i = 0, l = vectors.length; i < l; i ++ ) {

				var vector = vectors[ i ];

				if ( vector === undefined ) {

					console.warn( 'THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i );
					vector = new Vector4();

				}

				array[ offset ++ ] = vector.x;
				array[ offset ++ ] = vector.y;
				array[ offset ++ ] = vector.z;
				array[ offset ++ ] = vector.w;

			}

			return this;

		},

		set: function ( value, offset ) {

			if ( offset === undefined ) offset = 0;

			this.array.set( value, offset );

			return this;

		},

		getX: function ( index ) {

			return this.array[ index * this.itemSize ];

		},

		setX: function ( index, x ) {

			this.array[ index * this.itemSize ] = x;

			return this;

		},

		getY: function ( index ) {

			return this.array[ index * this.itemSize + 1 ];

		},

		setY: function ( index, y ) {

			this.array[ index * this.itemSize + 1 ] = y;

			return this;

		},

		getZ: function ( index ) {

			return this.array[ index * this.itemSize + 2 ];

		},

		setZ: function ( index, z ) {

			this.array[ index * this.itemSize + 2 ] = z;

			return this;

		},

		getW: function ( index ) {

			return this.array[ index * this.itemSize + 3 ];

		},

		setW: function ( index, w ) {

			this.array[ index * this.itemSize + 3 ] = w;

			return this;

		},

		setXY: function ( index, x, y ) {

			index *= this.itemSize;

			this.array[ index + 0 ] = x;
			this.array[ index + 1 ] = y;

			return this;

		},

		setXYZ: function ( index, x, y, z ) {

			index *= this.itemSize;

			this.array[ index + 0 ] = x;
			this.array[ index + 1 ] = y;
			this.array[ index + 2 ] = z;

			return this;

		},

		setXYZW: function ( index, x, y, z, w ) {

			index *= this.itemSize;

			this.array[ index + 0 ] = x;
			this.array[ index + 1 ] = y;
			this.array[ index + 2 ] = z;
			this.array[ index + 3 ] = w;

			return this;

		},

		onUpload: function ( callback ) {

			this.onUploadCallback = callback;

			return this;

		},

		clone: function () {

			return new this.constructor( this.array, this.itemSize ).copy( this );

		}

	} );

	function Uint16BufferAttribute( array, itemSize, normalized ) {

		BufferAttribute.call( this, new Uint16Array( array ), itemSize, normalized );

	}

	Uint16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Uint16BufferAttribute.prototype.constructor = Uint16BufferAttribute;


	function Uint32BufferAttribute( array, itemSize, normalized ) {

		BufferAttribute.call( this, new Uint32Array( array ), itemSize, normalized );

	}

	Uint32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Uint32BufferAttribute.prototype.constructor = Uint32BufferAttribute;


	function Float32BufferAttribute( array, itemSize, normalized ) {

		BufferAttribute.call( this, new Float32Array( array ), itemSize, normalized );

	}

	Float32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );
	Float32BufferAttribute.prototype.constructor = Float32BufferAttribute;

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function DirectGeometry() {

		this.indices = [];
		this.vertices = [];
		this.normals = [];
		this.colors = [];
		this.uvs = [];
		this.uvs2 = [];

		this.groups = [];

		this.morphTargets = {};

		this.skinWeights = [];
		this.skinIndices = [];

		// this.lineDistances = [];

		this.boundingBox = null;
		this.boundingSphere = null;

		// update flags

		this.verticesNeedUpdate = false;
		this.normalsNeedUpdate = false;
		this.colorsNeedUpdate = false;
		this.uvsNeedUpdate = false;
		this.groupsNeedUpdate = false;

	}

	Object.assign( DirectGeometry.prototype, {

		computeGroups: function ( geometry ) {

			var group;
			var groups = [];
			var materialIndex = undefined;

			var faces = geometry.faces;

			for ( var i = 0; i < faces.length; i ++ ) {

				var face = faces[ i ];

				// materials

				if ( face.materialIndex !== materialIndex ) {

					materialIndex = face.materialIndex;

					if ( group !== undefined ) {

						group.count = ( i * 3 ) - group.start;
						groups.push( group );

					}

					group = {
						start: i * 3,
						materialIndex: materialIndex
					};

				}

			}

			if ( group !== undefined ) {

				group.count = ( i * 3 ) - group.start;
				groups.push( group );

			}

			this.groups = groups;

		},

		fromGeometry: function ( geometry ) {

			var faces = geometry.faces;
			var vertices = geometry.vertices;
			var faceVertexUvs = geometry.faceVertexUvs;

			var hasFaceVertexUv = faceVertexUvs[ 0 ] && faceVertexUvs[ 0 ].length > 0;
			var hasFaceVertexUv2 = faceVertexUvs[ 1 ] && faceVertexUvs[ 1 ].length > 0;

			// morphs

			var morphTargets = geometry.morphTargets;
			var morphTargetsLength = morphTargets.length;

			var morphTargetsPosition;

			if ( morphTargetsLength > 0 ) {

				morphTargetsPosition = [];

				for ( var i = 0; i < morphTargetsLength; i ++ ) {

					morphTargetsPosition[ i ] = [];

				}

				this.morphTargets.position = morphTargetsPosition;

			}

			var morphNormals = geometry.morphNormals;
			var morphNormalsLength = morphNormals.length;

			var morphTargetsNormal;

			if ( morphNormalsLength > 0 ) {

				morphTargetsNormal = [];

				for ( var i = 0; i < morphNormalsLength; i ++ ) {

					morphTargetsNormal[ i ] = [];

				}

				this.morphTargets.normal = morphTargetsNormal;

			}

			// skins

			var skinIndices = geometry.skinIndices;
			var skinWeights = geometry.skinWeights;

			var hasSkinIndices = skinIndices.length === vertices.length;
			var hasSkinWeights = skinWeights.length === vertices.length;

			//

			for ( var i = 0; i < faces.length; i ++ ) {

				var face = faces[ i ];

				this.vertices.push( vertices[ face.a ], vertices[ face.b ], vertices[ face.c ] );

				var vertexNormals = face.vertexNormals;

				if ( vertexNormals.length === 3 ) {

					this.normals.push( vertexNormals[ 0 ], vertexNormals[ 1 ], vertexNormals[ 2 ] );

				} else {

					var normal = face.normal;

					this.normals.push( normal, normal, normal );

				}

				var vertexColors = face.vertexColors;

				if ( vertexColors.length === 3 ) {

					this.colors.push( vertexColors[ 0 ], vertexColors[ 1 ], vertexColors[ 2 ] );

				} else {

					var color = face.color;

					this.colors.push( color, color, color );

				}

				if ( hasFaceVertexUv === true ) {

					var vertexUvs = faceVertexUvs[ 0 ][ i ];

					if ( vertexUvs !== undefined ) {

						this.uvs.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

					} else {

						console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv ', i );

						this.uvs.push( new Vector2(), new Vector2(), new Vector2() );

					}

				}

				if ( hasFaceVertexUv2 === true ) {

					var vertexUvs = faceVertexUvs[ 1 ][ i ];

					if ( vertexUvs !== undefined ) {

						this.uvs2.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

					} else {

						console.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv2 ', i );

						this.uvs2.push( new Vector2(), new Vector2(), new Vector2() );

					}

				}

				// morphs

				for ( var j = 0; j < morphTargetsLength; j ++ ) {

					var morphTarget = morphTargets[ j ].vertices;

					morphTargetsPosition[ j ].push( morphTarget[ face.a ], morphTarget[ face.b ], morphTarget[ face.c ] );

				}

				for ( var j = 0; j < morphNormalsLength; j ++ ) {

					var morphNormal = morphNormals[ j ].vertexNormals[ i ];

					morphTargetsNormal[ j ].push( morphNormal.a, morphNormal.b, morphNormal.c );

				}

				// skins

				if ( hasSkinIndices ) {

					this.skinIndices.push( skinIndices[ face.a ], skinIndices[ face.b ], skinIndices[ face.c ] );

				}

				if ( hasSkinWeights ) {

					this.skinWeights.push( skinWeights[ face.a ], skinWeights[ face.b ], skinWeights[ face.c ] );

				}

			}

			this.computeGroups( geometry );

			this.verticesNeedUpdate = geometry.verticesNeedUpdate;
			this.normalsNeedUpdate = geometry.normalsNeedUpdate;
			this.colorsNeedUpdate = geometry.colorsNeedUpdate;
			this.uvsNeedUpdate = geometry.uvsNeedUpdate;
			this.groupsNeedUpdate = geometry.groupsNeedUpdate;

			return this;

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */

	var bufferGeometryId = 1; // BufferGeometry uses odd numbers as Id

	function BufferGeometry() {

		Object.defineProperty( this, 'id', { value: bufferGeometryId += 2 } );

		this.uuid = _Math.generateUUID();

		this.name = '';
		this.type = 'BufferGeometry';

		this.index = null;
		this.attributes = {};

		this.morphAttributes = {};

		this.groups = [];

		this.boundingBox = null;
		this.boundingSphere = null;

		this.drawRange = { start: 0, count: Infinity };

	}

	Object.assign( BufferGeometry.prototype, EventDispatcher.prototype, {

		isBufferGeometry: true,

		getIndex: function () {

			return this.index;

		},

		setIndex: function ( index ) {

			if ( Array.isArray( index ) ) {

				this.index = new ( arrayMax( index ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( index, 1 );

			} else {

				this.index = index;

			}

		},

		addAttribute: function ( name, attribute ) {

			if ( ! ( attribute && attribute.isBufferAttribute ) && ! ( attribute && attribute.isInterleavedBufferAttribute ) ) {

				console.warn( 'THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).' );

				this.addAttribute( name, new BufferAttribute( arguments[ 1 ], arguments[ 2 ] ) );

				return;

			}

			if ( name === 'index' ) {

				console.warn( 'THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.' );
				this.setIndex( attribute );

				return;

			}

			this.attributes[ name ] = attribute;

			return this;

		},

		getAttribute: function ( name ) {

			return this.attributes[ name ];

		},

		removeAttribute: function ( name ) {

			delete this.attributes[ name ];

			return this;

		},

		addGroup: function ( start, count, materialIndex ) {

			this.groups.push( {

				start: start,
				count: count,
				materialIndex: materialIndex !== undefined ? materialIndex : 0

			} );

		},

		clearGroups: function () {

			this.groups = [];

		},

		setDrawRange: function ( start, count ) {

			this.drawRange.start = start;
			this.drawRange.count = count;

		},

		applyMatrix: function ( matrix ) {

			var position = this.attributes.position;

			if ( position !== undefined ) {

				matrix.applyToBufferAttribute( position );
				position.needsUpdate = true;

			}

			var normal = this.attributes.normal;

			if ( normal !== undefined ) {

				var normalMatrix = new Matrix3().getNormalMatrix( matrix );

				normalMatrix.applyToBufferAttribute( normal );
				normal.needsUpdate = true;

			}

			if ( this.boundingBox !== null ) {

				this.computeBoundingBox();

			}

			if ( this.boundingSphere !== null ) {

				this.computeBoundingSphere();

			}

			return this;

		},

		rotateX: function () {

			// rotate geometry around world x-axis

			var m1 = new Matrix4();

			return function rotateX( angle ) {

				m1.makeRotationX( angle );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		rotateY: function () {

			// rotate geometry around world y-axis

			var m1 = new Matrix4();

			return function rotateY( angle ) {

				m1.makeRotationY( angle );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		rotateZ: function () {

			// rotate geometry around world z-axis

			var m1 = new Matrix4();

			return function rotateZ( angle ) {

				m1.makeRotationZ( angle );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		translate: function () {

			// translate geometry

			var m1 = new Matrix4();

			return function translate( x, y, z ) {

				m1.makeTranslation( x, y, z );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		scale: function () {

			// scale geometry

			var m1 = new Matrix4();

			return function scale( x, y, z ) {

				m1.makeScale( x, y, z );

				this.applyMatrix( m1 );

				return this;

			};

		}(),

		lookAt: function () {

			var obj = new Object3D();

			return function lookAt( vector ) {

				obj.lookAt( vector );

				obj.updateMatrix();

				this.applyMatrix( obj.matrix );

			};

		}(),

		center: function () {

			this.computeBoundingBox();

			var offset = this.boundingBox.getCenter().negate();

			this.translate( offset.x, offset.y, offset.z );

			return offset;

		},

		setFromObject: function ( object ) {

			// console.log( 'THREE.BufferGeometry.setFromObject(). Converting', object, this );

			var geometry = object.geometry;

			if ( object.isPoints || object.isLine ) {

				var positions = new Float32BufferAttribute( geometry.vertices.length * 3, 3 );
				var colors = new Float32BufferAttribute( geometry.colors.length * 3, 3 );

				this.addAttribute( 'position', positions.copyVector3sArray( geometry.vertices ) );
				this.addAttribute( 'color', colors.copyColorsArray( geometry.colors ) );

				if ( geometry.lineDistances && geometry.lineDistances.length === geometry.vertices.length ) {

					var lineDistances = new Float32BufferAttribute( geometry.lineDistances.length, 1 );

					this.addAttribute( 'lineDistance', lineDistances.copyArray( geometry.lineDistances ) );

				}

				if ( geometry.boundingSphere !== null ) {

					this.boundingSphere = geometry.boundingSphere.clone();

				}

				if ( geometry.boundingBox !== null ) {

					this.boundingBox = geometry.boundingBox.clone();

				}

			} else if ( object.isMesh ) {

				if ( geometry && geometry.isGeometry ) {

					this.fromGeometry( geometry );

				}

			}

			return this;

		},

		setFromPoints: function ( points ) {

			var position = [];

			for ( var i = 0, l = points.length; i < l; i ++ ) {

				var point = points[ i ];
				position.push( point.x, point.y, point.z || 0 );

			}

			this.addAttribute( 'position', new Float32BufferAttribute( position, 3 ) );

			return this;

		},

		updateFromObject: function ( object ) {

			var geometry = object.geometry;

			if ( object.isMesh ) {

				var direct = geometry.__directGeometry;

				if ( geometry.elementsNeedUpdate === true ) {

					direct = undefined;
					geometry.elementsNeedUpdate = false;

				}

				if ( direct === undefined ) {

					return this.fromGeometry( geometry );

				}

				direct.verticesNeedUpdate = geometry.verticesNeedUpdate;
				direct.normalsNeedUpdate = geometry.normalsNeedUpdate;
				direct.colorsNeedUpdate = geometry.colorsNeedUpdate;
				direct.uvsNeedUpdate = geometry.uvsNeedUpdate;
				direct.groupsNeedUpdate = geometry.groupsNeedUpdate;

				geometry.verticesNeedUpdate = false;
				geometry.normalsNeedUpdate = false;
				geometry.colorsNeedUpdate = false;
				geometry.uvsNeedUpdate = false;
				geometry.groupsNeedUpdate = false;

				geometry = direct;

			}

			var attribute;

			if ( geometry.verticesNeedUpdate === true ) {

				attribute = this.attributes.position;

				if ( attribute !== undefined ) {

					attribute.copyVector3sArray( geometry.vertices );
					attribute.needsUpdate = true;

				}

				geometry.verticesNeedUpdate = false;

			}

			if ( geometry.normalsNeedUpdate === true ) {

				attribute = this.attributes.normal;

				if ( attribute !== undefined ) {

					attribute.copyVector3sArray( geometry.normals );
					attribute.needsUpdate = true;

				}

				geometry.normalsNeedUpdate = false;

			}

			if ( geometry.colorsNeedUpdate === true ) {

				attribute = this.attributes.color;

				if ( attribute !== undefined ) {

					attribute.copyColorsArray( geometry.colors );
					attribute.needsUpdate = true;

				}

				geometry.colorsNeedUpdate = false;

			}

			if ( geometry.uvsNeedUpdate ) {

				attribute = this.attributes.uv;

				if ( attribute !== undefined ) {

					attribute.copyVector2sArray( geometry.uvs );
					attribute.needsUpdate = true;

				}

				geometry.uvsNeedUpdate = false;

			}

			if ( geometry.lineDistancesNeedUpdate ) {

				attribute = this.attributes.lineDistance;

				if ( attribute !== undefined ) {

					attribute.copyArray( geometry.lineDistances );
					attribute.needsUpdate = true;

				}

				geometry.lineDistancesNeedUpdate = false;

			}

			if ( geometry.groupsNeedUpdate ) {

				geometry.computeGroups( object.geometry );
				this.groups = geometry.groups;

				geometry.groupsNeedUpdate = false;

			}

			return this;

		},

		fromGeometry: function ( geometry ) {

			geometry.__directGeometry = new DirectGeometry().fromGeometry( geometry );

			return this.fromDirectGeometry( geometry.__directGeometry );

		},

		fromDirectGeometry: function ( geometry ) {

			var positions = new Float32Array( geometry.vertices.length * 3 );
			this.addAttribute( 'position', new BufferAttribute( positions, 3 ).copyVector3sArray( geometry.vertices ) );

			if ( geometry.normals.length > 0 ) {

				var normals = new Float32Array( geometry.normals.length * 3 );
				this.addAttribute( 'normal', new BufferAttribute( normals, 3 ).copyVector3sArray( geometry.normals ) );

			}

			if ( geometry.colors.length > 0 ) {

				var colors = new Float32Array( geometry.colors.length * 3 );
				this.addAttribute( 'color', new BufferAttribute( colors, 3 ).copyColorsArray( geometry.colors ) );

			}

			if ( geometry.uvs.length > 0 ) {

				var uvs = new Float32Array( geometry.uvs.length * 2 );
				this.addAttribute( 'uv', new BufferAttribute( uvs, 2 ).copyVector2sArray( geometry.uvs ) );

			}

			if ( geometry.uvs2.length > 0 ) {

				var uvs2 = new Float32Array( geometry.uvs2.length * 2 );
				this.addAttribute( 'uv2', new BufferAttribute( uvs2, 2 ).copyVector2sArray( geometry.uvs2 ) );

			}

			if ( geometry.indices.length > 0 ) {

				var TypeArray = arrayMax( geometry.indices ) > 65535 ? Uint32Array : Uint16Array;
				var indices = new TypeArray( geometry.indices.length * 3 );
				this.setIndex( new BufferAttribute( indices, 1 ).copyIndicesArray( geometry.indices ) );

			}

			// groups

			this.groups = geometry.groups;

			// morphs

			for ( var name in geometry.morphTargets ) {

				var array = [];
				var morphTargets = geometry.morphTargets[ name ];

				for ( var i = 0, l = morphTargets.length; i < l; i ++ ) {

					var morphTarget = morphTargets[ i ];

					var attribute = new Float32BufferAttribute( morphTarget.length * 3, 3 );

					array.push( attribute.copyVector3sArray( morphTarget ) );

				}

				this.morphAttributes[ name ] = array;

			}

			// skinning

			if ( geometry.skinIndices.length > 0 ) {

				var skinIndices = new Float32BufferAttribute( geometry.skinIndices.length * 4, 4 );
				this.addAttribute( 'skinIndex', skinIndices.copyVector4sArray( geometry.skinIndices ) );

			}

			if ( geometry.skinWeights.length > 0 ) {

				var skinWeights = new Float32BufferAttribute( geometry.skinWeights.length * 4, 4 );
				this.addAttribute( 'skinWeight', skinWeights.copyVector4sArray( geometry.skinWeights ) );

			}

			//

			if ( geometry.boundingSphere !== null ) {

				this.boundingSphere = geometry.boundingSphere.clone();

			}

			if ( geometry.boundingBox !== null ) {

				this.boundingBox = geometry.boundingBox.clone();

			}

			return this;

		},

		computeBoundingBox: function () {

			if ( this.boundingBox === null ) {

				this.boundingBox = new Box3();

			}

			var position = this.attributes.position;

			if ( position !== undefined ) {

				this.boundingBox.setFromBufferAttribute( position );

			} else {

				this.boundingBox.makeEmpty();

			}

			if ( isNaN( this.boundingBox.min.x ) || isNaN( this.boundingBox.min.y ) || isNaN( this.boundingBox.min.z ) ) {

				console.error( 'THREE.BufferGeometry.computeBoundingBox: Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this );

			}

		},

		computeBoundingSphere: function () {

			var box = new Box3();
			var vector = new Vector3();

			return function computeBoundingSphere() {

				if ( this.boundingSphere === null ) {

					this.boundingSphere = new Sphere();

				}

				var position = this.attributes.position;

				if ( position ) {

					var center = this.boundingSphere.center;

					box.setFromBufferAttribute( position );
					box.getCenter( center );

					// hoping to find a boundingSphere with a radius smaller than the
					// boundingSphere of the boundingBox: sqrt(3) smaller in the best case

					var maxRadiusSq = 0;

					for ( var i = 0, il = position.count; i < il; i ++ ) {

						vector.x = position.getX( i );
						vector.y = position.getY( i );
						vector.z = position.getZ( i );
						maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( vector ) );

					}

					this.boundingSphere.radius = Math.sqrt( maxRadiusSq );

					if ( isNaN( this.boundingSphere.radius ) ) {

						console.error( 'THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this );

					}

				}

			};

		}(),

		computeFaceNormals: function () {

			// backwards compatibility

		},

		computeVertexNormals: function () {

			var index = this.index;
			var attributes = this.attributes;
			var groups = this.groups;

			if ( attributes.position ) {

				var positions = attributes.position.array;

				if ( attributes.normal === undefined ) {

					this.addAttribute( 'normal', new BufferAttribute( new Float32Array( positions.length ), 3 ) );

				} else {

					// reset existing normals to zero

					var array = attributes.normal.array;

					for ( var i = 0, il = array.length; i < il; i ++ ) {

						array[ i ] = 0;

					}

				}

				var normals = attributes.normal.array;

				var vA, vB, vC;
				var pA = new Vector3(), pB = new Vector3(), pC = new Vector3();
				var cb = new Vector3(), ab = new Vector3();

				// indexed elements

				if ( index ) {

					var indices = index.array;

					if ( groups.length === 0 ) {

						this.addGroup( 0, indices.length );

					}

					for ( var j = 0, jl = groups.length; j < jl; ++ j ) {

						var group = groups[ j ];

						var start = group.start;
						var count = group.count;

						for ( var i = start, il = start + count; i < il; i += 3 ) {

							vA = indices[ i + 0 ] * 3;
							vB = indices[ i + 1 ] * 3;
							vC = indices[ i + 2 ] * 3;

							pA.fromArray( positions, vA );
							pB.fromArray( positions, vB );
							pC.fromArray( positions, vC );

							cb.subVectors( pC, pB );
							ab.subVectors( pA, pB );
							cb.cross( ab );

							normals[ vA ] += cb.x;
							normals[ vA + 1 ] += cb.y;
							normals[ vA + 2 ] += cb.z;

							normals[ vB ] += cb.x;
							normals[ vB + 1 ] += cb.y;
							normals[ vB + 2 ] += cb.z;

							normals[ vC ] += cb.x;
							normals[ vC + 1 ] += cb.y;
							normals[ vC + 2 ] += cb.z;

						}

					}

				} else {

					// non-indexed elements (unconnected triangle soup)

					for ( var i = 0, il = positions.length; i < il; i += 9 ) {

						pA.fromArray( positions, i );
						pB.fromArray( positions, i + 3 );
						pC.fromArray( positions, i + 6 );

						cb.subVectors( pC, pB );
						ab.subVectors( pA, pB );
						cb.cross( ab );

						normals[ i ] = cb.x;
						normals[ i + 1 ] = cb.y;
						normals[ i + 2 ] = cb.z;

						normals[ i + 3 ] = cb.x;
						normals[ i + 4 ] = cb.y;
						normals[ i + 5 ] = cb.z;

						normals[ i + 6 ] = cb.x;
						normals[ i + 7 ] = cb.y;
						normals[ i + 8 ] = cb.z;

					}

				}

				this.normalizeNormals();

				attributes.normal.needsUpdate = true;

			}

		},

		merge: function ( geometry, offset ) {

			if ( ! ( geometry && geometry.isBufferGeometry ) ) {

				console.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );
				return;

			}

			if ( offset === undefined ) offset = 0;

			var attributes = this.attributes;

			for ( var key in attributes ) {

				if ( geometry.attributes[ key ] === undefined ) continue;

				var attribute1 = attributes[ key ];
				var attributeArray1 = attribute1.array;

				var attribute2 = geometry.attributes[ key ];
				var attributeArray2 = attribute2.array;

				var attributeSize = attribute2.itemSize;

				for ( var i = 0, j = attributeSize * offset; i < attributeArray2.length; i ++, j ++ ) {

					attributeArray1[ j ] = attributeArray2[ i ];

				}

			}

			return this;

		},

		normalizeNormals: function () {

			var vector = new Vector3();

			return function normalizeNormals() {

				var normals = this.attributes.normal;

				for ( var i = 0, il = normals.count; i < il; i ++ ) {

					vector.x = normals.getX( i );
					vector.y = normals.getY( i );
					vector.z = normals.getZ( i );

					vector.normalize();

					normals.setXYZ( i, vector.x, vector.y, vector.z );

				}

			};

		}(),

		toNonIndexed: function () {

			if ( this.index === null ) {

				console.warn( 'THREE.BufferGeometry.toNonIndexed(): Geometry is already non-indexed.' );
				return this;

			}

			var geometry2 = new BufferGeometry();

			var indices = this.index.array;
			var attributes = this.attributes;

			for ( var name in attributes ) {

				var attribute = attributes[ name ];

				var array = attribute.array;
				var itemSize = attribute.itemSize;

				var array2 = new array.constructor( indices.length * itemSize );

				var index = 0, index2 = 0;

				for ( var i = 0, l = indices.length; i < l; i ++ ) {

					index = indices[ i ] * itemSize;

					for ( var j = 0; j < itemSize; j ++ ) {

						array2[ index2 ++ ] = array[ index ++ ];

					}

				}

				geometry2.addAttribute( name, new BufferAttribute( array2, itemSize ) );

			}

			return geometry2;

		},

		toJSON: function () {

			var data = {
				metadata: {
					version: 4.5,
					type: 'BufferGeometry',
					generator: 'BufferGeometry.toJSON'
				}
			};

			// standard BufferGeometry serialization

			data.uuid = this.uuid;
			data.type = this.type;
			if ( this.name !== '' ) data.name = this.name;

			if ( this.parameters !== undefined ) {

				var parameters = this.parameters;

				for ( var key in parameters ) {

					if ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];

				}

				return data;

			}

			data.data = { attributes: {} };

			var index = this.index;

			if ( index !== null ) {

				var array = Array.prototype.slice.call( index.array );

				data.data.index = {
					type: index.array.constructor.name,
					array: array
				};

			}

			var attributes = this.attributes;

			for ( var key in attributes ) {

				var attribute = attributes[ key ];

				var array = Array.prototype.slice.call( attribute.array );

				data.data.attributes[ key ] = {
					itemSize: attribute.itemSize,
					type: attribute.array.constructor.name,
					array: array,
					normalized: attribute.normalized
				};

			}

			var groups = this.groups;

			if ( groups.length > 0 ) {

				data.data.groups = JSON.parse( JSON.stringify( groups ) );

			}

			var boundingSphere = this.boundingSphere;

			if ( boundingSphere !== null ) {

				data.data.boundingSphere = {
					center: boundingSphere.center.toArray(),
					radius: boundingSphere.radius
				};

			}

			return data;

		},

		clone: function () {

			/*
			 // Handle primitives

			 var parameters = this.parameters;

			 if ( parameters !== undefined ) {

			 var values = [];

			 for ( var key in parameters ) {

			 values.push( parameters[ key ] );

			 }

			 var geometry = Object.create( this.constructor.prototype );
			 this.constructor.apply( geometry, values );
			 return geometry;

			 }

			 return new this.constructor().copy( this );
			 */

			return new BufferGeometry().copy( this );

		},

		copy: function ( source ) {

			var name, i, l;

			// reset

			this.index = null;
			this.attributes = {};
			this.morphAttributes = {};
			this.groups = [];
			this.boundingBox = null;
			this.boundingSphere = null;

			// name

			this.name = source.name;

			// index

			var index = source.index;

			if ( index !== null ) {

				this.setIndex( index.clone() );

			}

			// attributes

			var attributes = source.attributes;

			for ( name in attributes ) {

				var attribute = attributes[ name ];
				this.addAttribute( name, attribute.clone() );

			}

			// morph attributes

			var morphAttributes = source.morphAttributes;

			for ( name in morphAttributes ) {

				var array = [];
				var morphAttribute = morphAttributes[ name ]; // morphAttribute: array of Float32BufferAttributes

				for ( i = 0, l = morphAttribute.length; i < l; i ++ ) {

					array.push( morphAttribute[ i ].clone() );

				}

				this.morphAttributes[ name ] = array;

			}

			// groups

			var groups = source.groups;

			for ( i = 0, l = groups.length; i < l; i ++ ) {

				var group = groups[ i ];
				this.addGroup( group.start, group.count, group.materialIndex );

			}

			// bounding box

			var boundingBox = source.boundingBox;

			if ( boundingBox !== null ) {

				this.boundingBox = boundingBox.clone();

			}

			// bounding sphere

			var boundingSphere = source.boundingSphere;

			if ( boundingSphere !== null ) {

				this.boundingSphere = boundingSphere.clone();

			}

			// draw range

			this.drawRange.start = source.drawRange.start;
			this.drawRange.count = source.drawRange.count;

			return this;

		},

		dispose: function () {

			this.dispatchEvent( { type: 'dispose' } );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// BoxGeometry

	function BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {

		Geometry.call( this );

		this.type = 'BoxGeometry';

		this.parameters = {
			width: width,
			height: height,
			depth: depth,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			depthSegments: depthSegments
		};

		this.fromBufferGeometry( new BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) );
		this.mergeVertices();

	}

	BoxGeometry.prototype = Object.create( Geometry.prototype );
	BoxGeometry.prototype.constructor = BoxGeometry;

	// BoxBufferGeometry

	function BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) {

		BufferGeometry.call( this );

		this.type = 'BoxBufferGeometry';

		this.parameters = {
			width: width,
			height: height,
			depth: depth,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			depthSegments: depthSegments
		};

		var scope = this;

		width = width || 1;
		height = height || 1;
		depth = depth || 1;

		// segments

		widthSegments = Math.floor( widthSegments ) || 1;
		heightSegments = Math.floor( heightSegments ) || 1;
		depthSegments = Math.floor( depthSegments ) || 1;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// helper variables

		var numberOfVertices = 0;
		var groupStart = 0;

		// build each side of the box geometry

		buildPlane( 'z', 'y', 'x', - 1, - 1, depth, height, width, depthSegments, heightSegments, 0 ); // px
		buildPlane( 'z', 'y', 'x', 1, - 1, depth, height, - width, depthSegments, heightSegments, 1 ); // nx
		buildPlane( 'x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2 ); // py
		buildPlane( 'x', 'z', 'y', 1, - 1, width, depth, - height, widthSegments, depthSegments, 3 ); // ny
		buildPlane( 'x', 'y', 'z', 1, - 1, width, height, depth, widthSegments, heightSegments, 4 ); // pz
		buildPlane( 'x', 'y', 'z', - 1, - 1, width, height, - depth, widthSegments, heightSegments, 5 ); // nz

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

		function buildPlane( u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex ) {

			var segmentWidth = width / gridX;
			var segmentHeight = height / gridY;

			var widthHalf = width / 2;
			var heightHalf = height / 2;
			var depthHalf = depth / 2;

			var gridX1 = gridX + 1;
			var gridY1 = gridY + 1;

			var vertexCounter = 0;
			var groupCount = 0;

			var ix, iy;

			var vector = new Vector3();

			// generate vertices, normals and uvs

			for ( iy = 0; iy < gridY1; iy ++ ) {

				var y = iy * segmentHeight - heightHalf;

				for ( ix = 0; ix < gridX1; ix ++ ) {

					var x = ix * segmentWidth - widthHalf;

					// set values to correct vector component

					vector[ u ] = x * udir;
					vector[ v ] = y * vdir;
					vector[ w ] = depthHalf;

					// now apply vector to vertex buffer

					vertices.push( vector.x, vector.y, vector.z );

					// set values to correct vector component

					vector[ u ] = 0;
					vector[ v ] = 0;
					vector[ w ] = depth > 0 ? 1 : - 1;

					// now apply vector to normal buffer

					normals.push( vector.x, vector.y, vector.z );

					// uvs

					uvs.push( ix / gridX );
					uvs.push( 1 - ( iy / gridY ) );

					// counters

					vertexCounter += 1;

				}

			}

			// indices

			// 1. you need three indices to draw a single face
			// 2. a single segment consists of two faces
			// 3. so we need to generate six (2*3) indices per segment

			for ( iy = 0; iy < gridY; iy ++ ) {

				for ( ix = 0; ix < gridX; ix ++ ) {

					var a = numberOfVertices + ix + gridX1 * iy;
					var b = numberOfVertices + ix + gridX1 * ( iy + 1 );
					var c = numberOfVertices + ( ix + 1 ) + gridX1 * ( iy + 1 );
					var d = numberOfVertices + ( ix + 1 ) + gridX1 * iy;

					// faces

					indices.push( a, b, d );
					indices.push( b, c, d );

					// increase counter

					groupCount += 6;

				}

			}

			// add a group to the geometry. this will ensure multi material support

			scope.addGroup( groupStart, groupCount, materialIndex );

			// calculate new start value for groups

			groupStart += groupCount;

			// update total number of vertices

			numberOfVertices += vertexCounter;

		}

	}

	BoxBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	BoxBufferGeometry.prototype.constructor = BoxBufferGeometry;

	/**
	 * @author bhouston / http://clara.io
	 */

	function Ray( origin, direction ) {

		this.origin = ( origin !== undefined ) ? origin : new Vector3();
		this.direction = ( direction !== undefined ) ? direction : new Vector3();

	}

	Object.assign( Ray.prototype, {

		set: function ( origin, direction ) {

			this.origin.copy( origin );
			this.direction.copy( direction );

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( ray ) {

			this.origin.copy( ray.origin );
			this.direction.copy( ray.direction );

			return this;

		},

		at: function ( t, optionalTarget ) {

			var result = optionalTarget || new Vector3();

			return result.copy( this.direction ).multiplyScalar( t ).add( this.origin );

		},

		lookAt: function ( v ) {

			this.direction.copy( v ).sub( this.origin ).normalize();

			return this;

		},

		recast: function () {

			var v1 = new Vector3();

			return function recast( t ) {

				this.origin.copy( this.at( t, v1 ) );

				return this;

			};

		}(),

		closestPointToPoint: function ( point, optionalTarget ) {

			var result = optionalTarget || new Vector3();
			result.subVectors( point, this.origin );
			var directionDistance = result.dot( this.direction );

			if ( directionDistance < 0 ) {

				return result.copy( this.origin );

			}

			return result.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );

		},

		distanceToPoint: function ( point ) {

			return Math.sqrt( this.distanceSqToPoint( point ) );

		},

		distanceSqToPoint: function () {

			var v1 = new Vector3();

			return function distanceSqToPoint( point ) {

				var directionDistance = v1.subVectors( point, this.origin ).dot( this.direction );

				// point behind the ray

				if ( directionDistance < 0 ) {

					return this.origin.distanceToSquared( point );

				}

				v1.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );

				return v1.distanceToSquared( point );

			};

		}(),

		distanceSqToSegment: function () {

			var segCenter = new Vector3();
			var segDir = new Vector3();
			var diff = new Vector3();

			return function distanceSqToSegment( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {

				// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h
				// It returns the min distance between the ray and the segment
				// defined by v0 and v1
				// It can also set two optional targets :
				// - The closest point on the ray
				// - The closest point on the segment

				segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );
				segDir.copy( v1 ).sub( v0 ).normalize();
				diff.copy( this.origin ).sub( segCenter );

				var segExtent = v0.distanceTo( v1 ) * 0.5;
				var a01 = - this.direction.dot( segDir );
				var b0 = diff.dot( this.direction );
				var b1 = - diff.dot( segDir );
				var c = diff.lengthSq();
				var det = Math.abs( 1 - a01 * a01 );
				var s0, s1, sqrDist, extDet;

				if ( det > 0 ) {

					// The ray and segment are not parallel.

					s0 = a01 * b1 - b0;
					s1 = a01 * b0 - b1;
					extDet = segExtent * det;

					if ( s0 >= 0 ) {

						if ( s1 >= - extDet ) {

							if ( s1 <= extDet ) {

								// region 0
								// Minimum at interior points of ray and segment.

								var invDet = 1 / det;
								s0 *= invDet;
								s1 *= invDet;
								sqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;

							} else {

								// region 1

								s1 = segExtent;
								s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
								sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

							}

						} else {

							// region 5

							s1 = - segExtent;
							s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

						}

					} else {

						if ( s1 <= - extDet ) {

							// region 4

							s0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );
							s1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

						} else if ( s1 <= extDet ) {

							// region 3

							s0 = 0;
							s1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );
							sqrDist = s1 * ( s1 + 2 * b1 ) + c;

						} else {

							// region 2

							s0 = Math.max( 0, - ( a01 * segExtent + b0 ) );
							s1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );
							sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

						}

					}

				} else {

					// Ray and segment are parallel.

					s1 = ( a01 > 0 ) ? - segExtent : segExtent;
					s0 = Math.max( 0, - ( a01 * s1 + b0 ) );
					sqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;

				}

				if ( optionalPointOnRay ) {

					optionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );

				}

				if ( optionalPointOnSegment ) {

					optionalPointOnSegment.copy( segDir ).multiplyScalar( s1 ).add( segCenter );

				}

				return sqrDist;

			};

		}(),

		intersectSphere: function () {

			var v1 = new Vector3();

			return function intersectSphere( sphere, optionalTarget ) {

				v1.subVectors( sphere.center, this.origin );
				var tca = v1.dot( this.direction );
				var d2 = v1.dot( v1 ) - tca * tca;
				var radius2 = sphere.radius * sphere.radius;

				if ( d2 > radius2 ) return null;

				var thc = Math.sqrt( radius2 - d2 );

				// t0 = first intersect point - entrance on front of sphere
				var t0 = tca - thc;

				// t1 = second intersect point - exit point on back of sphere
				var t1 = tca + thc;

				// test to see if both t0 and t1 are behind the ray - if so, return null
				if ( t0 < 0 && t1 < 0 ) return null;

				// test to see if t0 is behind the ray:
				// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,
				// in order to always return an intersect point that is in front of the ray.
				if ( t0 < 0 ) return this.at( t1, optionalTarget );

				// else t0 is in front of the ray, so return the first collision point scaled by t0
				return this.at( t0, optionalTarget );

			};

		}(),

		intersectsSphere: function ( sphere ) {

			return this.distanceToPoint( sphere.center ) <= sphere.radius;

		},

		distanceToPlane: function ( plane ) {

			var denominator = plane.normal.dot( this.direction );

			if ( denominator === 0 ) {

				// line is coplanar, return origin
				if ( plane.distanceToPoint( this.origin ) === 0 ) {

					return 0;

				}

				// Null is preferable to undefined since undefined means.... it is undefined

				return null;

			}

			var t = - ( this.origin.dot( plane.normal ) + plane.constant ) / denominator;

			// Return if the ray never intersects the plane

			return t >= 0 ? t : null;

		},

		intersectPlane: function ( plane, optionalTarget ) {

			var t = this.distanceToPlane( plane );

			if ( t === null ) {

				return null;

			}

			return this.at( t, optionalTarget );

		},

		intersectsPlane: function ( plane ) {

			// check if the ray lies on the plane first

			var distToPoint = plane.distanceToPoint( this.origin );

			if ( distToPoint === 0 ) {

				return true;

			}

			var denominator = plane.normal.dot( this.direction );

			if ( denominator * distToPoint < 0 ) {

				return true;

			}

			// ray origin is behind the plane (and is pointing behind it)

			return false;

		},

		intersectBox: function ( box, optionalTarget ) {

			var tmin, tmax, tymin, tymax, tzmin, tzmax;

			var invdirx = 1 / this.direction.x,
				invdiry = 1 / this.direction.y,
				invdirz = 1 / this.direction.z;

			var origin = this.origin;

			if ( invdirx >= 0 ) {

				tmin = ( box.min.x - origin.x ) * invdirx;
				tmax = ( box.max.x - origin.x ) * invdirx;

			} else {

				tmin = ( box.max.x - origin.x ) * invdirx;
				tmax = ( box.min.x - origin.x ) * invdirx;

			}

			if ( invdiry >= 0 ) {

				tymin = ( box.min.y - origin.y ) * invdiry;
				tymax = ( box.max.y - origin.y ) * invdiry;

			} else {

				tymin = ( box.max.y - origin.y ) * invdiry;
				tymax = ( box.min.y - origin.y ) * invdiry;

			}

			if ( ( tmin > tymax ) || ( tymin > tmax ) ) return null;

			// These lines also handle the case where tmin or tmax is NaN
			// (result of 0 * Infinity). x !== x returns true if x is NaN

			if ( tymin > tmin || tmin !== tmin ) tmin = tymin;

			if ( tymax < tmax || tmax !== tmax ) tmax = tymax;

			if ( invdirz >= 0 ) {

				tzmin = ( box.min.z - origin.z ) * invdirz;
				tzmax = ( box.max.z - origin.z ) * invdirz;

			} else {

				tzmin = ( box.max.z - origin.z ) * invdirz;
				tzmax = ( box.min.z - origin.z ) * invdirz;

			}

			if ( ( tmin > tzmax ) || ( tzmin > tmax ) ) return null;

			if ( tzmin > tmin || tmin !== tmin ) tmin = tzmin;

			if ( tzmax < tmax || tmax !== tmax ) tmax = tzmax;

			//return point closest to the ray (positive side)

			if ( tmax < 0 ) return null;

			return this.at( tmin >= 0 ? tmin : tmax, optionalTarget );

		},

		intersectsBox: ( function () {

			var v = new Vector3();

			return function intersectsBox( box ) {

				return this.intersectBox( box, v ) !== null;

			};

		} )(),

		intersectTriangle: function () {

			// Compute the offset origin, edges, and normal.
			var diff = new Vector3();
			var edge1 = new Vector3();
			var edge2 = new Vector3();
			var normal = new Vector3();

			return function intersectTriangle( a, b, c, backfaceCulling, optionalTarget ) {

				// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h

				edge1.subVectors( b, a );
				edge2.subVectors( c, a );
				normal.crossVectors( edge1, edge2 );

				// Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,
				// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
				//   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
				//   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
				//   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)
				var DdN = this.direction.dot( normal );
				var sign;

				if ( DdN > 0 ) {

					if ( backfaceCulling ) return null;
					sign = 1;

				} else if ( DdN < 0 ) {

					sign = - 1;
					DdN = - DdN;

				} else {

					return null;

				}

				diff.subVectors( this.origin, a );
				var DdQxE2 = sign * this.direction.dot( edge2.crossVectors( diff, edge2 ) );

				// b1 < 0, no intersection
				if ( DdQxE2 < 0 ) {

					return null;

				}

				var DdE1xQ = sign * this.direction.dot( edge1.cross( diff ) );

				// b2 < 0, no intersection
				if ( DdE1xQ < 0 ) {

					return null;

				}

				// b1+b2 > 1, no intersection
				if ( DdQxE2 + DdE1xQ > DdN ) {

					return null;

				}

				// Line intersects triangle, check if ray does.
				var QdN = - sign * diff.dot( normal );

				// t < 0, no intersection
				if ( QdN < 0 ) {

					return null;

				}

				// Ray intersects triangle.
				return this.at( QdN / DdN, optionalTarget );

			};

		}(),

		applyMatrix4: function ( matrix4 ) {

			this.origin.applyMatrix4( matrix4 );
			this.direction.transformDirection( matrix4 );

			return this;

		},

		equals: function ( ray ) {

			return ray.origin.equals( this.origin ) && ray.direction.equals( this.direction );

		}

	} );

	/**
	 * @author bhouston / http://clara.io
	 */

	function Line3( start, end ) {

		this.start = ( start !== undefined ) ? start : new Vector3();
		this.end = ( end !== undefined ) ? end : new Vector3();

	}

	Object.assign( Line3.prototype, {

		set: function ( start, end ) {

			this.start.copy( start );
			this.end.copy( end );

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( line ) {

			this.start.copy( line.start );
			this.end.copy( line.end );

			return this;

		},

		getCenter: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();
			return result.addVectors( this.start, this.end ).multiplyScalar( 0.5 );

		},

		delta: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();
			return result.subVectors( this.end, this.start );

		},

		distanceSq: function () {

			return this.start.distanceToSquared( this.end );

		},

		distance: function () {

			return this.start.distanceTo( this.end );

		},

		at: function ( t, optionalTarget ) {

			var result = optionalTarget || new Vector3();

			return this.delta( result ).multiplyScalar( t ).add( this.start );

		},

		closestPointToPointParameter: function () {

			var startP = new Vector3();
			var startEnd = new Vector3();

			return function closestPointToPointParameter( point, clampToLine ) {

				startP.subVectors( point, this.start );
				startEnd.subVectors( this.end, this.start );

				var startEnd2 = startEnd.dot( startEnd );
				var startEnd_startP = startEnd.dot( startP );

				var t = startEnd_startP / startEnd2;

				if ( clampToLine ) {

					t = _Math.clamp( t, 0, 1 );

				}

				return t;

			};

		}(),

		closestPointToPoint: function ( point, clampToLine, optionalTarget ) {

			var t = this.closestPointToPointParameter( point, clampToLine );

			var result = optionalTarget || new Vector3();

			return this.delta( result ).multiplyScalar( t ).add( this.start );

		},

		applyMatrix4: function ( matrix ) {

			this.start.applyMatrix4( matrix );
			this.end.applyMatrix4( matrix );

			return this;

		},

		equals: function ( line ) {

			return line.start.equals( this.start ) && line.end.equals( this.end );

		}

	} );

	/**
	 * @author bhouston / http://clara.io
	 */

	function Plane( normal, constant ) {

		// normal is assumed to be normalized

		this.normal = ( normal !== undefined ) ? normal : new Vector3( 1, 0, 0 );
		this.constant = ( constant !== undefined ) ? constant : 0;

	}

	Object.assign( Plane.prototype, {

		set: function ( normal, constant ) {

			this.normal.copy( normal );
			this.constant = constant;

			return this;

		},

		setComponents: function ( x, y, z, w ) {

			this.normal.set( x, y, z );
			this.constant = w;

			return this;

		},

		setFromNormalAndCoplanarPoint: function ( normal, point ) {

			this.normal.copy( normal );
			this.constant = - point.dot( this.normal );

			return this;

		},

		setFromCoplanarPoints: function () {

			var v1 = new Vector3();
			var v2 = new Vector3();

			return function setFromCoplanarPoints( a, b, c ) {

				var normal = v1.subVectors( c, b ).cross( v2.subVectors( a, b ) ).normalize();

				// Q: should an error be thrown if normal is zero (e.g. degenerate plane)?

				this.setFromNormalAndCoplanarPoint( normal, a );

				return this;

			};

		}(),

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( plane ) {

			this.normal.copy( plane.normal );
			this.constant = plane.constant;

			return this;

		},

		normalize: function () {

			// Note: will lead to a divide by zero if the plane is invalid.

			var inverseNormalLength = 1.0 / this.normal.length();
			this.normal.multiplyScalar( inverseNormalLength );
			this.constant *= inverseNormalLength;

			return this;

		},

		negate: function () {

			this.constant *= - 1;
			this.normal.negate();

			return this;

		},

		distanceToPoint: function ( point ) {

			return this.normal.dot( point ) + this.constant;

		},

		distanceToSphere: function ( sphere ) {

			return this.distanceToPoint( sphere.center ) - sphere.radius;

		},

		projectPoint: function ( point, optionalTarget ) {

			var result = optionalTarget || new Vector3();

			return result.copy( this.normal ).multiplyScalar( - this.distanceToPoint( point ) ).add( point );

		},

		intersectLine: function () {

			var v1 = new Vector3();

			return function intersectLine( line, optionalTarget ) {

				var result = optionalTarget || new Vector3();

				var direction = line.delta( v1 );

				var denominator = this.normal.dot( direction );

				if ( denominator === 0 ) {

					// line is coplanar, return origin
					if ( this.distanceToPoint( line.start ) === 0 ) {

						return result.copy( line.start );

					}

					// Unsure if this is the correct method to handle this case.
					return undefined;

				}

				var t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;

				if ( t < 0 || t > 1 ) {

					return undefined;

				}

				return result.copy( direction ).multiplyScalar( t ).add( line.start );

			};

		}(),

		intersectsLine: function ( line ) {

			// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.

			var startSign = this.distanceToPoint( line.start );
			var endSign = this.distanceToPoint( line.end );

			return ( startSign < 0 && endSign > 0 ) || ( endSign < 0 && startSign > 0 );

		},

		intersectsBox: function ( box ) {

			return box.intersectsPlane( this );

		},

		intersectsSphere: function ( sphere ) {

			return sphere.intersectsPlane( this );

		},

		coplanarPoint: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();

			return result.copy( this.normal ).multiplyScalar( - this.constant );

		},

		applyMatrix4: function () {

			var v1 = new Vector3();
			var m1 = new Matrix3();

			return function applyMatrix4( matrix, optionalNormalMatrix ) {

				var normalMatrix = optionalNormalMatrix || m1.getNormalMatrix( matrix );

				var referencePoint = this.coplanarPoint( v1 ).applyMatrix4( matrix );

				var normal = this.normal.applyMatrix3( normalMatrix ).normalize();

				this.constant = - referencePoint.dot( normal );

				return this;

			};

		}(),

		translate: function ( offset ) {

			this.constant -= offset.dot( this.normal );

			return this;

		},

		equals: function ( plane ) {

			return plane.normal.equals( this.normal ) && ( plane.constant === this.constant );

		}

	} );

	/**
	 * @author bhouston / http://clara.io
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Triangle( a, b, c ) {

		this.a = ( a !== undefined ) ? a : new Vector3();
		this.b = ( b !== undefined ) ? b : new Vector3();
		this.c = ( c !== undefined ) ? c : new Vector3();

	}

	Object.assign( Triangle, {

		normal: function () {

			var v0 = new Vector3();

			return function normal( a, b, c, optionalTarget ) {

				var result = optionalTarget || new Vector3();

				result.subVectors( c, b );
				v0.subVectors( a, b );
				result.cross( v0 );

				var resultLengthSq = result.lengthSq();
				if ( resultLengthSq > 0 ) {

					return result.multiplyScalar( 1 / Math.sqrt( resultLengthSq ) );

				}

				return result.set( 0, 0, 0 );

			};

		}(),

		// static/instance method to calculate barycentric coordinates
		// based on: http://www.blackpawn.com/texts/pointinpoly/default.html
		barycoordFromPoint: function () {

			var v0 = new Vector3();
			var v1 = new Vector3();
			var v2 = new Vector3();

			return function barycoordFromPoint( point, a, b, c, optionalTarget ) {

				v0.subVectors( c, a );
				v1.subVectors( b, a );
				v2.subVectors( point, a );

				var dot00 = v0.dot( v0 );
				var dot01 = v0.dot( v1 );
				var dot02 = v0.dot( v2 );
				var dot11 = v1.dot( v1 );
				var dot12 = v1.dot( v2 );

				var denom = ( dot00 * dot11 - dot01 * dot01 );

				var result = optionalTarget || new Vector3();

				// collinear or singular triangle
				if ( denom === 0 ) {

					// arbitrary location outside of triangle?
					// not sure if this is the best idea, maybe should be returning undefined
					return result.set( - 2, - 1, - 1 );

				}

				var invDenom = 1 / denom;
				var u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;
				var v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;

				// barycentric coordinates must always sum to 1
				return result.set( 1 - u - v, v, u );

			};

		}(),

		containsPoint: function () {

			var v1 = new Vector3();

			return function containsPoint( point, a, b, c ) {

				var result = Triangle.barycoordFromPoint( point, a, b, c, v1 );

				return ( result.x >= 0 ) && ( result.y >= 0 ) && ( ( result.x + result.y ) <= 1 );

			};

		}()

	} );

	Object.assign( Triangle.prototype, {

		set: function ( a, b, c ) {

			this.a.copy( a );
			this.b.copy( b );
			this.c.copy( c );

			return this;

		},

		setFromPointsAndIndices: function ( points, i0, i1, i2 ) {

			this.a.copy( points[ i0 ] );
			this.b.copy( points[ i1 ] );
			this.c.copy( points[ i2 ] );

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( triangle ) {

			this.a.copy( triangle.a );
			this.b.copy( triangle.b );
			this.c.copy( triangle.c );

			return this;

		},

		area: function () {

			var v0 = new Vector3();
			var v1 = new Vector3();

			return function area() {

				v0.subVectors( this.c, this.b );
				v1.subVectors( this.a, this.b );

				return v0.cross( v1 ).length() * 0.5;

			};

		}(),

		midpoint: function ( optionalTarget ) {

			var result = optionalTarget || new Vector3();
			return result.addVectors( this.a, this.b ).add( this.c ).multiplyScalar( 1 / 3 );

		},

		normal: function ( optionalTarget ) {

			return Triangle.normal( this.a, this.b, this.c, optionalTarget );

		},

		plane: function ( optionalTarget ) {

			var result = optionalTarget || new Plane();

			return result.setFromCoplanarPoints( this.a, this.b, this.c );

		},

		barycoordFromPoint: function ( point, optionalTarget ) {

			return Triangle.barycoordFromPoint( point, this.a, this.b, this.c, optionalTarget );

		},

		containsPoint: function ( point ) {

			return Triangle.containsPoint( point, this.a, this.b, this.c );

		},

		closestPointToPoint: function () {

			var plane = new Plane();
			var edgeList = [ new Line3(), new Line3(), new Line3() ];
			var projectedPoint = new Vector3();
			var closestPoint = new Vector3();

			return function closestPointToPoint( point, optionalTarget ) {

				var result = optionalTarget || new Vector3();
				var minDistance = Infinity;

				// project the point onto the plane of the triangle

				plane.setFromCoplanarPoints( this.a, this.b, this.c );
				plane.projectPoint( point, projectedPoint );

				// check if the projection lies within the triangle

				if ( this.containsPoint( projectedPoint ) === true ) {

					// if so, this is the closest point

					result.copy( projectedPoint );

				} else {

					// if not, the point falls outside the triangle. the result is the closest point to the triangle's edges or vertices

					edgeList[ 0 ].set( this.a, this.b );
					edgeList[ 1 ].set( this.b, this.c );
					edgeList[ 2 ].set( this.c, this.a );

					for ( var i = 0; i < edgeList.length; i ++ ) {

						edgeList[ i ].closestPointToPoint( projectedPoint, true, closestPoint );

						var distance = projectedPoint.distanceToSquared( closestPoint );

						if ( distance < minDistance ) {

							minDistance = distance;

							result.copy( closestPoint );

						}

					}

				}

				return result;

			};

		}(),

		equals: function ( triangle ) {

			return triangle.a.equals( this.a ) && triangle.b.equals( this.b ) && triangle.c.equals( this.c );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	var materialId = 0;

	function Material() {

		Object.defineProperty( this, 'id', { value: materialId ++ } );

		this.uuid = _Math.generateUUID();

		this.name = '';
		this.type = 'Material';

		this.fog = true;
		this.lights = true;

		this.blending = NormalBlending;
		this.side = FrontSide;
		this.flatShading = false;
		this.vertexColors = NoColors; // THREE.NoColors, THREE.VertexColors, THREE.FaceColors

		this.opacity = 1;
		this.transparent = false;

		this.blendSrc = SrcAlphaFactor;
		this.blendDst = OneMinusSrcAlphaFactor;
		this.blendEquation = AddEquation;
		this.blendSrcAlpha = null;
		this.blendDstAlpha = null;
		this.blendEquationAlpha = null;

		this.depthFunc = LessEqualDepth;
		this.depthTest = true;
		this.depthWrite = true;

		this.clippingPlanes = null;
		this.clipIntersection = false;
		this.clipShadows = false;

		this.colorWrite = true;

		this.precision = null; // override the renderer's default precision for this material

		this.polygonOffset = false;
		this.polygonOffsetFactor = 0;
		this.polygonOffsetUnits = 0;

		this.dithering = false;

		this.alphaTest = 0;
		this.premultipliedAlpha = false;

		this.overdraw = 0; // Overdrawn pixels (typically between 0 and 1) for fixing antialiasing gaps in CanvasRenderer

		this.visible = true;

		this.userData = {};

		this.needsUpdate = true;

	}

	Object.assign( Material.prototype, EventDispatcher.prototype, {

		isMaterial: true,

		onBeforeCompile: function () {},

		setValues: function ( values ) {

			if ( values === undefined ) return;

			for ( var key in values ) {

				var newValue = values[ key ];

				if ( newValue === undefined ) {

					console.warn( "THREE.Material: '" + key + "' parameter is undefined." );
					continue;

				}

				// for backward compatability if shading is set in the constructor
				if ( key === 'shading' ) {

					console.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );
					this.flatShading = ( newValue === FlatShading ) ? true : false;
					continue;

				}

				var currentValue = this[ key ];

				if ( currentValue === undefined ) {

					console.warn( "THREE." + this.type + ": '" + key + "' is not a property of this material." );
					continue;

				}

				if ( currentValue && currentValue.isColor ) {

					currentValue.set( newValue );

				} else if ( ( currentValue && currentValue.isVector3 ) && ( newValue && newValue.isVector3 ) ) {

					currentValue.copy( newValue );

				} else if ( key === 'overdraw' ) {

					// ensure overdraw is backwards-compatible with legacy boolean type
					this[ key ] = Number( newValue );

				} else {

					this[ key ] = newValue;

				}

			}

		},

		toJSON: function ( meta ) {

			var isRoot = ( meta === undefined || typeof meta === 'string' );

			if ( isRoot ) {

				meta = {
					textures: {},
					images: {}
				};

			}

			var data = {
				metadata: {
					version: 4.5,
					type: 'Material',
					generator: 'Material.toJSON'
				}
			};

			// standard Material serialization
			data.uuid = this.uuid;
			data.type = this.type;

			if ( this.name !== '' ) data.name = this.name;

			if ( this.color && this.color.isColor ) data.color = this.color.getHex();

			if ( this.roughness !== undefined ) data.roughness = this.roughness;
			if ( this.metalness !== undefined ) data.metalness = this.metalness;

			if ( this.emissive && this.emissive.isColor ) data.emissive = this.emissive.getHex();
			if ( this.emissiveIntensity !== 1 ) data.emissiveIntensity = this.emissiveIntensity;

			if ( this.specular && this.specular.isColor ) data.specular = this.specular.getHex();
			if ( this.shininess !== undefined ) data.shininess = this.shininess;
			if ( this.clearCoat !== undefined ) data.clearCoat = this.clearCoat;
			if ( this.clearCoatRoughness !== undefined ) data.clearCoatRoughness = this.clearCoatRoughness;

			if ( this.map && this.map.isTexture ) data.map = this.map.toJSON( meta ).uuid;
			if ( this.alphaMap && this.alphaMap.isTexture ) data.alphaMap = this.alphaMap.toJSON( meta ).uuid;
			if ( this.lightMap && this.lightMap.isTexture ) data.lightMap = this.lightMap.toJSON( meta ).uuid;
			if ( this.bumpMap && this.bumpMap.isTexture ) {

				data.bumpMap = this.bumpMap.toJSON( meta ).uuid;
				data.bumpScale = this.bumpScale;

			}
			if ( this.normalMap && this.normalMap.isTexture ) {

				data.normalMap = this.normalMap.toJSON( meta ).uuid;
				data.normalScale = this.normalScale.toArray();

			}
			if ( this.displacementMap && this.displacementMap.isTexture ) {

				data.displacementMap = this.displacementMap.toJSON( meta ).uuid;
				data.displacementScale = this.displacementScale;
				data.displacementBias = this.displacementBias;

			}
			if ( this.roughnessMap && this.roughnessMap.isTexture ) data.roughnessMap = this.roughnessMap.toJSON( meta ).uuid;
			if ( this.metalnessMap && this.metalnessMap.isTexture ) data.metalnessMap = this.metalnessMap.toJSON( meta ).uuid;

			if ( this.emissiveMap && this.emissiveMap.isTexture ) data.emissiveMap = this.emissiveMap.toJSON( meta ).uuid;
			if ( this.specularMap && this.specularMap.isTexture ) data.specularMap = this.specularMap.toJSON( meta ).uuid;

			if ( this.envMap && this.envMap.isTexture ) {

				data.envMap = this.envMap.toJSON( meta ).uuid;
				data.reflectivity = this.reflectivity; // Scale behind envMap

			}

			if ( this.gradientMap && this.gradientMap.isTexture ) {

				data.gradientMap = this.gradientMap.toJSON( meta ).uuid;

			}

			if ( this.size !== undefined ) data.size = this.size;
			if ( this.sizeAttenuation !== undefined ) data.sizeAttenuation = this.sizeAttenuation;

			if ( this.blending !== NormalBlending ) data.blending = this.blending;
			if ( this.flatShading === true ) data.flatShading = this.flatShading;
			if ( this.side !== FrontSide ) data.side = this.side;
			if ( this.vertexColors !== NoColors ) data.vertexColors = this.vertexColors;

			if ( this.opacity < 1 ) data.opacity = this.opacity;
			if ( this.transparent === true ) data.transparent = this.transparent;

			data.depthFunc = this.depthFunc;
			data.depthTest = this.depthTest;
			data.depthWrite = this.depthWrite;

			// rotation (SpriteMaterial)
			if ( this.rotation !== 0 ) data.rotation = this.rotation;

			if ( this.linewidth !== 1 ) data.linewidth = this.linewidth;
			if ( this.dashSize !== undefined ) data.dashSize = this.dashSize;
			if ( this.gapSize !== undefined ) data.gapSize = this.gapSize;
			if ( this.scale !== undefined ) data.scale = this.scale;

			if ( this.dithering === true ) data.dithering = true;

			if ( this.alphaTest > 0 ) data.alphaTest = this.alphaTest;
			if ( this.premultipliedAlpha === true ) data.premultipliedAlpha = this.premultipliedAlpha;

			if ( this.wireframe === true ) data.wireframe = this.wireframe;
			if ( this.wireframeLinewidth > 1 ) data.wireframeLinewidth = this.wireframeLinewidth;
			if ( this.wireframeLinecap !== 'round' ) data.wireframeLinecap = this.wireframeLinecap;
			if ( this.wireframeLinejoin !== 'round' ) data.wireframeLinejoin = this.wireframeLinejoin;

			if ( this.morphTargets === true ) data.morphTargets = true;
			if ( this.skinning === true ) data.skinning = true;

			if ( this.visible === false ) data.visible = false;
			if ( JSON.stringify( this.userData ) !== '{}' ) data.userData = this.userData;

			// TODO: Copied from Object3D.toJSON

			function extractFromCache( cache ) {

				var values = [];

				for ( var key in cache ) {

					var data = cache[ key ];
					delete data.metadata;
					values.push( data );

				}

				return values;

			}

			if ( isRoot ) {

				var textures = extractFromCache( meta.textures );
				var images = extractFromCache( meta.images );

				if ( textures.length > 0 ) data.textures = textures;
				if ( images.length > 0 ) data.images = images;

			}

			return data;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( source ) {

			this.name = source.name;

			this.fog = source.fog;
			this.lights = source.lights;

			this.blending = source.blending;
			this.side = source.side;
			this.flatShading = source.flatShading;
			this.vertexColors = source.vertexColors;

			this.opacity = source.opacity;
			this.transparent = source.transparent;

			this.blendSrc = source.blendSrc;
			this.blendDst = source.blendDst;
			this.blendEquation = source.blendEquation;
			this.blendSrcAlpha = source.blendSrcAlpha;
			this.blendDstAlpha = source.blendDstAlpha;
			this.blendEquationAlpha = source.blendEquationAlpha;

			this.depthFunc = source.depthFunc;
			this.depthTest = source.depthTest;
			this.depthWrite = source.depthWrite;

			this.colorWrite = source.colorWrite;

			this.precision = source.precision;

			this.polygonOffset = source.polygonOffset;
			this.polygonOffsetFactor = source.polygonOffsetFactor;
			this.polygonOffsetUnits = source.polygonOffsetUnits;

			this.dithering = source.dithering;

			this.alphaTest = source.alphaTest;
			this.premultipliedAlpha = source.premultipliedAlpha;

			this.overdraw = source.overdraw;

			this.visible = source.visible;
			this.userData = JSON.parse( JSON.stringify( source.userData ) );

			this.clipShadows = source.clipShadows;
			this.clipIntersection = source.clipIntersection;

			var srcPlanes = source.clippingPlanes,
				dstPlanes = null;

			if ( srcPlanes !== null ) {

				var n = srcPlanes.length;
				dstPlanes = new Array( n );

				for ( var i = 0; i !== n; ++ i )
					dstPlanes[ i ] = srcPlanes[ i ].clone();

			}

			this.clippingPlanes = dstPlanes;

			return this;

		},

		dispose: function () {

			this.dispatchEvent( { type: 'dispose' } );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  specularMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
	 *  combine: THREE.Multiply,
	 *  reflectivity: <float>,
	 *  refractionRatio: <float>,
	 *
	 *  depthTest: <bool>,
	 *  depthWrite: <bool>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>
	 * }
	 */

	function MeshBasicMaterial( parameters ) {

		Material.call( this );

		this.type = 'MeshBasicMaterial';

		this.color = new Color( 0xffffff ); // emissive

		this.map = null;

		this.lightMap = null;
		this.lightMapIntensity = 1.0;

		this.aoMap = null;
		this.aoMapIntensity = 1.0;

		this.specularMap = null;

		this.alphaMap = null;

		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;

		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';

		this.skinning = false;
		this.morphTargets = false;

		this.lights = false;

		this.setValues( parameters );

	}

	MeshBasicMaterial.prototype = Object.create( Material.prototype );
	MeshBasicMaterial.prototype.constructor = MeshBasicMaterial;

	MeshBasicMaterial.prototype.isMeshBasicMaterial = true;

	MeshBasicMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.color.copy( source.color );

		this.map = source.map;

		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;

		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;

		this.specularMap = source.specularMap;

		this.alphaMap = source.alphaMap;

		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;

		return this;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author jonobr1 / http://jonobr1.com/
	 */

	function Mesh( geometry, material ) {

		Object3D.call( this );

		this.type = 'Mesh';

		this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
		this.material = material !== undefined ? material : new MeshBasicMaterial( { color: Math.random() * 0xffffff } );

		this.drawMode = TrianglesDrawMode;

		this.updateMorphTargets();

	}

	Mesh.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Mesh,

		isMesh: true,

		setDrawMode: function ( value ) {

			this.drawMode = value;

		},

		copy: function ( source ) {

			Object3D.prototype.copy.call( this, source );

			this.drawMode = source.drawMode;

			if ( source.morphTargetInfluences !== undefined ) {

				this.morphTargetInfluences = source.morphTargetInfluences.slice();

			}

			if ( source.morphTargetDictionary !== undefined ) {

				this.morphTargetDictionary = Object.assign( {}, source.morphTargetDictionary );

			}

			return this;

		},

		updateMorphTargets: function () {

			var geometry = this.geometry;
			var m, ml, name;

			if ( geometry.isBufferGeometry ) {

				var morphAttributes = geometry.morphAttributes;
				var keys = Object.keys( morphAttributes );

				if ( keys.length > 0 ) {

					var morphAttribute = morphAttributes[ keys[ 0 ] ];

					if ( morphAttribute !== undefined ) {

						this.morphTargetInfluences = [];
						this.morphTargetDictionary = {};

						for ( m = 0, ml = morphAttribute.length; m < ml; m ++ ) {

							name = morphAttribute[ m ].name || String( m );

							this.morphTargetInfluences.push( 0 );
							this.morphTargetDictionary[ name ] = m;

						}

					}

				}

			} else {

				var morphTargets = geometry.morphTargets;

				if ( morphTargets !== undefined && morphTargets.length > 0 ) {

					this.morphTargetInfluences = [];
					this.morphTargetDictionary = {};

					for ( m = 0, ml = morphTargets.length; m < ml; m ++ ) {

						name = morphTargets[ m ].name || String( m );

						this.morphTargetInfluences.push( 0 );
						this.morphTargetDictionary[ name ] = m;

					}

				}

			}

		},

		raycast: ( function () {

			var inverseMatrix = new Matrix4();
			var ray = new Ray();
			var sphere = new Sphere();

			var vA = new Vector3();
			var vB = new Vector3();
			var vC = new Vector3();

			var tempA = new Vector3();
			var tempB = new Vector3();
			var tempC = new Vector3();

			var uvA = new Vector2();
			var uvB = new Vector2();
			var uvC = new Vector2();

			var barycoord = new Vector3();

			var intersectionPoint = new Vector3();
			var intersectionPointWorld = new Vector3();

			function uvIntersection( point, p1, p2, p3, uv1, uv2, uv3 ) {

				Triangle.barycoordFromPoint( point, p1, p2, p3, barycoord );

				uv1.multiplyScalar( barycoord.x );
				uv2.multiplyScalar( barycoord.y );
				uv3.multiplyScalar( barycoord.z );

				uv1.add( uv2 ).add( uv3 );

				return uv1.clone();

			}

			function checkIntersection( object, material, raycaster, ray, pA, pB, pC, point ) {

				var intersect;

				if ( material.side === BackSide ) {

					intersect = ray.intersectTriangle( pC, pB, pA, true, point );

				} else {

					intersect = ray.intersectTriangle( pA, pB, pC, material.side !== DoubleSide, point );

				}

				if ( intersect === null ) return null;

				intersectionPointWorld.copy( point );
				intersectionPointWorld.applyMatrix4( object.matrixWorld );

				var distance = raycaster.ray.origin.distanceTo( intersectionPointWorld );

				if ( distance < raycaster.near || distance > raycaster.far ) return null;

				return {
					distance: distance,
					point: intersectionPointWorld.clone(),
					object: object
				};

			}

			function checkBufferGeometryIntersection( object, raycaster, ray, position, uv, a, b, c ) {

				vA.fromBufferAttribute( position, a );
				vB.fromBufferAttribute( position, b );
				vC.fromBufferAttribute( position, c );

				var intersection = checkIntersection( object, object.material, raycaster, ray, vA, vB, vC, intersectionPoint );

				if ( intersection ) {

					if ( uv ) {

						uvA.fromBufferAttribute( uv, a );
						uvB.fromBufferAttribute( uv, b );
						uvC.fromBufferAttribute( uv, c );

						intersection.uv = uvIntersection( intersectionPoint, vA, vB, vC, uvA, uvB, uvC );

					}

					intersection.face = new Face3( a, b, c, Triangle.normal( vA, vB, vC ) );
					intersection.faceIndex = a;

				}

				return intersection;

			}

			return function raycast( raycaster, intersects ) {

				var geometry = this.geometry;
				var material = this.material;
				var matrixWorld = this.matrixWorld;

				if ( material === undefined ) return;

				// Checking boundingSphere distance to ray

				if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();

				sphere.copy( geometry.boundingSphere );
				sphere.applyMatrix4( matrixWorld );

				if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;

				//

				inverseMatrix.getInverse( matrixWorld );
				ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );

				// Check boundingBox before continuing

				if ( geometry.boundingBox !== null ) {

					if ( ray.intersectsBox( geometry.boundingBox ) === false ) return;

				}

				var intersection;

				if ( geometry.isBufferGeometry ) {

					var a, b, c;
					var index = geometry.index;
					var position = geometry.attributes.position;
					var uv = geometry.attributes.uv;
					var i, l;

					if ( index !== null ) {

						// indexed buffer geometry

						for ( i = 0, l = index.count; i < l; i += 3 ) {

							a = index.getX( i );
							b = index.getX( i + 1 );
							c = index.getX( i + 2 );

							intersection = checkBufferGeometryIntersection( this, raycaster, ray, position, uv, a, b, c );

							if ( intersection ) {

								intersection.faceIndex = Math.floor( i / 3 ); // triangle number in indices buffer semantics
								intersects.push( intersection );

							}

						}

					} else if ( position !== undefined ) {

						// non-indexed buffer geometry

						for ( i = 0, l = position.count; i < l; i += 3 ) {

							a = i;
							b = i + 1;
							c = i + 2;

							intersection = checkBufferGeometryIntersection( this, raycaster, ray, position, uv, a, b, c );

							if ( intersection ) {

								intersection.index = a; // triangle number in positions buffer semantics
								intersects.push( intersection );

							}

						}

					}

				} else if ( geometry.isGeometry ) {

					var fvA, fvB, fvC;
					var isMultiMaterial = Array.isArray( material );

					var vertices = geometry.vertices;
					var faces = geometry.faces;
					var uvs;

					var faceVertexUvs = geometry.faceVertexUvs[ 0 ];
					if ( faceVertexUvs.length > 0 ) uvs = faceVertexUvs;

					for ( var f = 0, fl = faces.length; f < fl; f ++ ) {

						var face = faces[ f ];
						var faceMaterial = isMultiMaterial ? material[ face.materialIndex ] : material;

						if ( faceMaterial === undefined ) continue;

						fvA = vertices[ face.a ];
						fvB = vertices[ face.b ];
						fvC = vertices[ face.c ];

						if ( faceMaterial.morphTargets === true ) {

							var morphTargets = geometry.morphTargets;
							var morphInfluences = this.morphTargetInfluences;

							vA.set( 0, 0, 0 );
							vB.set( 0, 0, 0 );
							vC.set( 0, 0, 0 );

							for ( var t = 0, tl = morphTargets.length; t < tl; t ++ ) {

								var influence = morphInfluences[ t ];

								if ( influence === 0 ) continue;

								var targets = morphTargets[ t ].vertices;

								vA.addScaledVector( tempA.subVectors( targets[ face.a ], fvA ), influence );
								vB.addScaledVector( tempB.subVectors( targets[ face.b ], fvB ), influence );
								vC.addScaledVector( tempC.subVectors( targets[ face.c ], fvC ), influence );

							}

							vA.add( fvA );
							vB.add( fvB );
							vC.add( fvC );

							fvA = vA;
							fvB = vB;
							fvC = vC;

						}

						intersection = checkIntersection( this, faceMaterial, raycaster, ray, fvA, fvB, fvC, intersectionPoint );

						if ( intersection ) {

							if ( uvs && uvs[ f ] ) {

								var uvs_f = uvs[ f ];
								uvA.copy( uvs_f[ 0 ] );
								uvB.copy( uvs_f[ 1 ] );
								uvC.copy( uvs_f[ 2 ] );

								intersection.uv = uvIntersection( intersectionPoint, fvA, fvB, fvC, uvA, uvB, uvC );

							}

							intersection.face = face;
							intersection.faceIndex = f;
							intersects.push( intersection );

						}

					}

				}

			};

		}() ),

		clone: function () {

			return new this.constructor( this.geometry, this.material ).copy( this );

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'PropertyBinding', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// STATIC STUFF
			QUnit.test( "Composite", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "create", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( 'sanitizeNodeName', ( assert ) => {

				assert.equal(
					PropertyBinding.sanitizeNodeName( 'valid-name-123_' ),
					'valid-name-123_',
					'Leaves valid name intact.'
				);

				assert.equal(
					PropertyBinding.sanitizeNodeName( 'space separated name 123_ -' ),
					'space_separated_name_123__-',
					'Replaces spaces with underscores.'
				);

				assert.equal(
					PropertyBinding.sanitizeNodeName( '"invalid" name %123%_' ),
					'invalid_name_123_',
					'Strips invalid characters.'
				);

			} );

			QUnit.test( 'parseTrackName', ( assert ) => {

				var paths = [

					[
						'.property',
						{
							nodeName: undefined,
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'nodeName.property',
						{
							nodeName: 'nodeName',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'a.property',
						{
							nodeName: 'a',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'no.de.Name.property',
						{
							nodeName: 'no.de.Name',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'no.d-e.Name.property',
						{
							nodeName: 'no.d-e.Name',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'nodeName.property[accessor]',
						{
							nodeName: 'nodeName',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: 'accessor'
						}
					],

					[
						'nodeName.material.property[accessor]',
						{
							nodeName: 'nodeName',
							objectName: 'material',
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: 'accessor'
						}
					],

					[
						'no.de.Name.material.property',
						{
							nodeName: 'no.de.Name',
							objectName: 'material',
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'no.de.Name.material[materialIndex].property',
						{
							nodeName: 'no.de.Name',
							objectName: 'material',
							objectIndex: 'materialIndex',
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'uuid.property[accessor]',
						{
							nodeName: 'uuid',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: 'accessor'
						}
					],

					[
						'uuid.objectName[objectIndex].propertyName[propertyIndex]',
						{
							nodeName: 'uuid',
							objectName: 'objectName',
							objectIndex: 'objectIndex',
							propertyName: 'propertyName',
							propertyIndex: 'propertyIndex'
						}
					],

					[
						'parentName/nodeName.property',
						{
							// directoryName is currently unused.
							nodeName: 'nodeName',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'parentName/no.de.Name.property',
						{
							// directoryName is currently unused.
							nodeName: 'no.de.Name',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: undefined
						}
					],

					[
						'parentName/parentName/nodeName.property[index]',
						{
							// directoryName is currently unused.
							nodeName: 'nodeName',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'property',
							propertyIndex: 'index'
						}
					],

					[
						'.bone[Armature.DEF_cog].position',
						{
							nodeName: undefined,
							objectName: 'bone',
							objectIndex: 'Armature.DEF_cog',
							propertyName: 'position',
							propertyIndex: undefined
						}
					],

					[
						'scene:helium_balloon_model:helium_balloon_model.position',
						{
							nodeName: 'helium_balloon_model',
							objectName: undefined,
							objectIndex: undefined,
							propertyName: 'position',
							propertyIndex: undefined
						}
					]
				];

				paths.forEach( function ( path ) {

					assert.smartEqual(
						PropertyBinding.parseTrackName( path[ 0 ] ),
						path[ 1 ],
						'Parses track name: ' + path[ 0 ]
					);

				} );

			} );

			QUnit.test( "findNode", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "BindingType", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "Versioning", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "GetterByBindingType", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "SetterByBindingTypeAndVersioning", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getValue", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( 'setValue', ( assert ) => {

				var paths = [
					'.material.opacity',
					'.material[opacity]'
				];

				paths.forEach( function ( path ) {

					var originalValue = 0;
					var expectedValue = 1;

					var geometry = new BoxGeometry();
					var material = new MeshBasicMaterial();
					material.opacity = originalValue;
					var mesh = new Mesh( geometry, material );

					var binding = new PropertyBinding( mesh, path, null );
					binding.bind();

					assert.equal(
						material.opacity,
						originalValue,
						'Sets property of material with "' + path + '" (pre-setValue)'
					);

					binding.setValue( [ expectedValue ], 0 );
					assert.equal(
						material.opacity,
						expectedValue,
						'Sets property of material with "' + path + '" (post-setValue)'
					);

				} );

			} );

			QUnit.test( "bind", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "unbind", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "_getValue_unavailable", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_setValue_unavailable", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module.todo( 'PropertyMixer', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PRIVATE STUFF
			QUnit.test( "_select", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_slerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "_lerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "accumulate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "apply", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "saveOriginalState", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "restoreOriginalState", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module( 'Tracks', () => {

			QUnit.module.todo( 'BooleanKeyframeTrack', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module( 'Tracks', () => {

			QUnit.module.todo( 'ColorKeyframeTrack', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module( 'Tracks', () => {

			QUnit.module.todo( 'NumberKeyframeTrack', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module( 'Tracks', () => {

			QUnit.module.todo( 'QuaternionKeyframeTrack', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module( 'Tracks', () => {

			QUnit.module.todo( 'StringKeyframeTrack', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Animation', () => {

		QUnit.module( 'Tracks', () => {

			QUnit.module.todo( 'VectorKeyframeTrack', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Reece Aaron Lecrivain / http://reecenotes.com/
	 */

	function Audio( listener ) {

		Object3D.call( this );

		this.type = 'Audio';

		this.context = listener.context;

		this.gain = this.context.createGain();
		this.gain.connect( listener.getInput() );

		this.autoplay = false;

		this.buffer = null;
		this.loop = false;
		this.startTime = 0;
		this.offset = 0;
		this.playbackRate = 1;
		this.isPlaying = false;
		this.hasPlaybackControl = true;
		this.sourceType = 'empty';

		this.filters = [];

	}

	Audio.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Audio,

		getOutput: function () {

			return this.gain;

		},

		setNodeSource: function ( audioNode ) {

			this.hasPlaybackControl = false;
			this.sourceType = 'audioNode';
			this.source = audioNode;
			this.connect();

			return this;

		},

		setBuffer: function ( audioBuffer ) {

			this.buffer = audioBuffer;
			this.sourceType = 'buffer';

			if ( this.autoplay ) this.play();

			return this;

		},

		play: function () {

			if ( this.isPlaying === true ) {

				console.warn( 'THREE.Audio: Audio is already playing.' );
				return;

			}

			if ( this.hasPlaybackControl === false ) {

				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;

			}

			var source = this.context.createBufferSource();

			source.buffer = this.buffer;
			source.loop = this.loop;
			source.onended = this.onEnded.bind( this );
			source.playbackRate.setValueAtTime( this.playbackRate, this.startTime );
			this.startTime = this.context.currentTime;
			source.start( this.startTime, this.offset );

			this.isPlaying = true;

			this.source = source;

			return this.connect();

		},

		pause: function () {

			if ( this.hasPlaybackControl === false ) {

				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;

			}

			if ( this.isPlaying === true ) {

				this.source.stop();
				this.offset += ( this.context.currentTime - this.startTime ) * this.playbackRate;
				this.isPlaying = false;

			}

			return this;

		},

		stop: function () {

			if ( this.hasPlaybackControl === false ) {

				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;

			}

			this.source.stop();
			this.offset = 0;
			this.isPlaying = false;

			return this;

		},

		connect: function () {

			if ( this.filters.length > 0 ) {

				this.source.connect( this.filters[ 0 ] );

				for ( var i = 1, l = this.filters.length; i < l; i ++ ) {

					this.filters[ i - 1 ].connect( this.filters[ i ] );

				}

				this.filters[ this.filters.length - 1 ].connect( this.getOutput() );

			} else {

				this.source.connect( this.getOutput() );

			}

			return this;

		},

		disconnect: function () {

			if ( this.filters.length > 0 ) {

				this.source.disconnect( this.filters[ 0 ] );

				for ( var i = 1, l = this.filters.length; i < l; i ++ ) {

					this.filters[ i - 1 ].disconnect( this.filters[ i ] );

				}

				this.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );

			} else {

				this.source.disconnect( this.getOutput() );

			}

			return this;

		},

		getFilters: function () {

			return this.filters;

		},

		setFilters: function ( value ) {

			if ( ! value ) value = [];

			if ( this.isPlaying === true ) {

				this.disconnect();
				this.filters = value;
				this.connect();

			} else {

				this.filters = value;

			}

			return this;

		},

		getFilter: function () {

			return this.getFilters()[ 0 ];

		},

		setFilter: function ( filter ) {

			return this.setFilters( filter ? [ filter ] : [] );

		},

		setPlaybackRate: function ( value ) {

			if ( this.hasPlaybackControl === false ) {

				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;

			}

			this.playbackRate = value;

			if ( this.isPlaying === true ) {

				this.source.playbackRate.setValueAtTime( this.playbackRate, this.context.currentTime );

			}

			return this;

		},

		getPlaybackRate: function () {

			return this.playbackRate;

		},

		onEnded: function () {

			this.isPlaying = false;

		},

		getLoop: function () {

			if ( this.hasPlaybackControl === false ) {

				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return false;

			}

			return this.loop;

		},

		setLoop: function ( value ) {

			if ( this.hasPlaybackControl === false ) {

				console.warn( 'THREE.Audio: this Audio has no playback control.' );
				return;

			}

			this.loop = value;

			if ( this.isPlaying === true ) {

				this.source.loop = this.loop;

			}

			return this;

		},

		getVolume: function () {

			return this.gain.gain.value;

		},

		setVolume: function ( value ) {

			this.gain.gain.value = value;

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Audios', () => {

		QUnit.module.todo( 'Audio', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "getOutput", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setNodeSource", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setBuffer", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "play", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "pause", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "stop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "connect", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "disconnect", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getFilters", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFilters", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getFilter", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFilter", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPlaybackRate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getPlaybackRate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onEnded", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getLoop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setLoop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getVolume", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setVolume", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function AudioAnalyser( audio, fftSize ) {

		this.analyser = audio.context.createAnalyser();
		this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;

		this.data = new Uint8Array( this.analyser.frequencyBinCount );

		audio.getOutput().connect( this.analyser );

	}

	Object.assign( AudioAnalyser.prototype, {

		getFrequencyData: function () {

			this.analyser.getByteFrequencyData( this.data );

			return this.data;

		},

		getAverageFrequency: function () {

			var value = 0, data = this.getFrequencyData();

			for ( var i = 0; i < data.length; i ++ ) {

				value += data[ i ];

			}

			return value / data.length;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Audios', () => {

		QUnit.module.todo( 'AudioAnalyser', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "getFrequencyData", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getAverageFrequency", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	var context;

	var AudioContext = {

		getContext: function () {

			if ( context === undefined ) {

				context = new ( window.AudioContext || window.webkitAudioContext )();

			}

			return context;

		},

		setContext: function ( value ) {

			context = value;

		}

	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Audios', () => {

		QUnit.module.todo( 'AudioContext', () => {

			// PUBLIC STUFF
			QUnit.test( "getContext", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setContext", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function AudioListener() {

		Object3D.call( this );

		this.type = 'AudioListener';

		this.context = AudioContext.getContext();

		this.gain = this.context.createGain();
		this.gain.connect( this.context.destination );

		this.filter = null;

	}

	AudioListener.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: AudioListener,

		getInput: function () {

			return this.gain;

		},

		removeFilter: function ( ) {

			if ( this.filter !== null ) {

				this.gain.disconnect( this.filter );
				this.filter.disconnect( this.context.destination );
				this.gain.connect( this.context.destination );
				this.filter = null;

			}

		},

		getFilter: function () {

			return this.filter;

		},

		setFilter: function ( value ) {

			if ( this.filter !== null ) {

				this.gain.disconnect( this.filter );
				this.filter.disconnect( this.context.destination );

			} else {

				this.gain.disconnect( this.context.destination );

			}

			this.filter = value;
			this.gain.connect( this.filter );
			this.filter.connect( this.context.destination );

		},

		getMasterVolume: function () {

			return this.gain.gain.value;

		},

		setMasterVolume: function ( value ) {

			this.gain.gain.value = value;

		},

		updateMatrixWorld: ( function () {

			var position = new Vector3();
			var quaternion = new Quaternion();
			var scale = new Vector3();

			var orientation = new Vector3();

			return function updateMatrixWorld( force ) {

				Object3D.prototype.updateMatrixWorld.call( this, force );

				var listener = this.context.listener;
				var up = this.up;

				this.matrixWorld.decompose( position, quaternion, scale );

				orientation.set( 0, 0, - 1 ).applyQuaternion( quaternion );

				if ( listener.positionX ) {

					listener.positionX.setValueAtTime( position.x, this.context.currentTime );
					listener.positionY.setValueAtTime( position.y, this.context.currentTime );
					listener.positionZ.setValueAtTime( position.z, this.context.currentTime );
					listener.forwardX.setValueAtTime( orientation.x, this.context.currentTime );
					listener.forwardY.setValueAtTime( orientation.y, this.context.currentTime );
					listener.forwardZ.setValueAtTime( orientation.z, this.context.currentTime );
					listener.upX.setValueAtTime( up.x, this.context.currentTime );
					listener.upY.setValueAtTime( up.y, this.context.currentTime );
					listener.upZ.setValueAtTime( up.z, this.context.currentTime );

				} else {

					listener.setPosition( position.x, position.y, position.z );
					listener.setOrientation( orientation.x, orientation.y, orientation.z, up.x, up.y, up.z );

				}

			};

		} )()

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Audios', () => {

		QUnit.module.todo( 'AudioListener', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "getInput", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "removeFilter", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getFilter", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFilter", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getMasterVolume", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setMasterVolume", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function PositionalAudio( listener ) {

		Audio.call( this, listener );

		this.panner = this.context.createPanner();
		this.panner.connect( this.gain );

	}

	PositionalAudio.prototype = Object.assign( Object.create( Audio.prototype ), {

		constructor: PositionalAudio,

		getOutput: function () {

			return this.panner;

		},

		getRefDistance: function () {

			return this.panner.refDistance;

		},

		setRefDistance: function ( value ) {

			this.panner.refDistance = value;

		},

		getRolloffFactor: function () {

			return this.panner.rolloffFactor;

		},

		setRolloffFactor: function ( value ) {

			this.panner.rolloffFactor = value;

		},

		getDistanceModel: function () {

			return this.panner.distanceModel;

		},

		setDistanceModel: function ( value ) {

			this.panner.distanceModel = value;

		},

		getMaxDistance: function () {

			return this.panner.maxDistance;

		},

		setMaxDistance: function ( value ) {

			this.panner.maxDistance = value;

		},

		updateMatrixWorld: ( function () {

			var position = new Vector3();

			return function updateMatrixWorld( force ) {

				Object3D.prototype.updateMatrixWorld.call( this, force );

				position.setFromMatrixPosition( this.matrixWorld );

				this.panner.setPosition( position.x, position.y, position.z );

			};

		} )()


	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Audios', () => {

		QUnit.module.todo( 'PositionalAudio', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "getOutput", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getRefDistance", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setRefDistance", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getRolloffFactor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setRolloffFactor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getDistanceModel", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setDistanceModel", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getMaxDistance", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setMaxDistance", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author mikael emtinger / http://gomo.se/
	 * @author WestLangley / http://github.com/WestLangley
	*/

	function Camera() {

		Object3D.call( this );

		this.type = 'Camera';

		this.matrixWorldInverse = new Matrix4();
		this.projectionMatrix = new Matrix4();

	}

	Camera.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Camera,

		isCamera: true,

		copy: function ( source, recursive ) {

			Object3D.prototype.copy.call( this, source, recursive );

			this.matrixWorldInverse.copy( source.matrixWorldInverse );
			this.projectionMatrix.copy( source.projectionMatrix );

			return this;

		},

		getWorldDirection: function () {

			var quaternion = new Quaternion();

			return function getWorldDirection( optionalTarget ) {

				var result = optionalTarget || new Vector3();

				this.getWorldQuaternion( quaternion );

				return result.set( 0, 0, - 1 ).applyQuaternion( quaternion );

			};

		}(),

		updateMatrixWorld: function ( force ) {

			Object3D.prototype.updateMatrixWorld.call( this, force );

			this.matrixWorldInverse.getInverse( this.matrixWorld );

		},

		clone: function () {

			return new this.constructor().copy( this );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author greggman / http://games.greggman.com/
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author tschw
	 */

	function PerspectiveCamera( fov, aspect, near, far ) {

		Camera.call( this );

		this.type = 'PerspectiveCamera';

		this.fov = fov !== undefined ? fov : 50;
		this.zoom = 1;

		this.near = near !== undefined ? near : 0.1;
		this.far = far !== undefined ? far : 2000;
		this.focus = 10;

		this.aspect = aspect !== undefined ? aspect : 1;
		this.view = null;

		this.filmGauge = 35;	// width of the film (default in millimeters)
		this.filmOffset = 0;	// horizontal film offset (same unit as gauge)

		this.updateProjectionMatrix();

	}

	PerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ), {

		constructor: PerspectiveCamera,

		isPerspectiveCamera: true,

		copy: function ( source, recursive ) {

			Camera.prototype.copy.call( this, source, recursive );

			this.fov = source.fov;
			this.zoom = source.zoom;

			this.near = source.near;
			this.far = source.far;
			this.focus = source.focus;

			this.aspect = source.aspect;
			this.view = source.view === null ? null : Object.assign( {}, source.view );

			this.filmGauge = source.filmGauge;
			this.filmOffset = source.filmOffset;

			return this;

		},

		/**
		 * Sets the FOV by focal length in respect to the current .filmGauge.
		 *
		 * The default film gauge is 35, so that the focal length can be specified for
		 * a 35mm (full frame) camera.
		 *
		 * Values for focal length and film gauge must have the same unit.
		 */
		setFocalLength: function ( focalLength ) {

			// see http://www.bobatkins.com/photography/technical/field_of_view.html
			var vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;

			this.fov = _Math.RAD2DEG * 2 * Math.atan( vExtentSlope );
			this.updateProjectionMatrix();

		},

		/**
		 * Calculates the focal length from the current .fov and .filmGauge.
		 */
		getFocalLength: function () {

			var vExtentSlope = Math.tan( _Math.DEG2RAD * 0.5 * this.fov );

			return 0.5 * this.getFilmHeight() / vExtentSlope;

		},

		getEffectiveFOV: function () {

			return _Math.RAD2DEG * 2 * Math.atan(
				Math.tan( _Math.DEG2RAD * 0.5 * this.fov ) / this.zoom );

		},

		getFilmWidth: function () {

			// film not completely covered in portrait format (aspect < 1)
			return this.filmGauge * Math.min( this.aspect, 1 );

		},

		getFilmHeight: function () {

			// film not completely covered in landscape format (aspect > 1)
			return this.filmGauge / Math.max( this.aspect, 1 );

		},

		/**
		 * Sets an offset in a larger frustum. This is useful for multi-window or
		 * multi-monitor/multi-machine setups.
		 *
		 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
		 * the monitors are in grid like this
		 *
		 *   +---+---+---+
		 *   | A | B | C |
		 *   +---+---+---+
		 *   | D | E | F |
		 *   +---+---+---+
		 *
		 * then for each monitor you would call it like this
		 *
		 *   var w = 1920;
		 *   var h = 1080;
		 *   var fullWidth = w * 3;
		 *   var fullHeight = h * 2;
		 *
		 *   --A--
		 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
		 *   --B--
		 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
		 *   --C--
		 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
		 *   --D--
		 *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
		 *   --E--
		 *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
		 *   --F--
		 *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
		 *
		 *   Note there is no reason monitors have to be the same size or in a grid.
		 */
		setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {

			this.aspect = fullWidth / fullHeight;

			if ( this.view === null ) {

				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};

			}

			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;

			this.updateProjectionMatrix();

		},

		clearViewOffset: function () {

			if ( this.view !== null ) {

				this.view.enabled = false;

			}

			this.updateProjectionMatrix();

		},

		updateProjectionMatrix: function () {

			var near = this.near,
				top = near * Math.tan(
					_Math.DEG2RAD * 0.5 * this.fov ) / this.zoom,
				height = 2 * top,
				width = this.aspect * height,
				left = - 0.5 * width,
				view = this.view;

			if ( this.view !== null && this.view.enabled ) {

				var fullWidth = view.fullWidth,
					fullHeight = view.fullHeight;

				left += view.offsetX * width / fullWidth;
				top -= view.offsetY * height / fullHeight;
				width *= view.width / fullWidth;
				height *= view.height / fullHeight;

			}

			var skew = this.filmOffset;
			if ( skew !== 0 ) left += near * skew / this.getFilmWidth();

			this.projectionMatrix.makePerspective( left, left + width, top, top - height, near, this.far );

		},

		toJSON: function ( meta ) {

			var data = Object3D.prototype.toJSON.call( this, meta );

			data.object.fov = this.fov;
			data.object.zoom = this.zoom;

			data.object.near = this.near;
			data.object.far = this.far;
			data.object.focus = this.focus;

			data.object.aspect = this.aspect;

			if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );

			data.object.filmGauge = this.filmGauge;
			data.object.filmOffset = this.filmOffset;

			return data;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function ArrayCamera( array ) {

		PerspectiveCamera.call( this );

		this.cameras = array || [];

	}

	ArrayCamera.prototype = Object.assign( Object.create( PerspectiveCamera.prototype ), {

		constructor: ArrayCamera,

		isArrayCamera: true

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Cameras', () => {

		QUnit.module.todo( 'ArrayCamera', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isArrayCamera", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Cameras', () => {

		QUnit.module.todo( 'Camera', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isCamera", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getWorldDirection", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var cam = new Camera();

				// fill the matrices with any nonsense values just to see if they get copied
				cam.matrixWorldInverse.set( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );
				cam.projectionMatrix.set( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );

				var clonedCam = cam.clone();

				// TODO: Uuuummmhhh DO NOT relie equality on object methods !
				// TODO: What's append if matrix.equal is wrongly implemented ???
				// TODO: this MUST be check by assert
				assert.ok( cam.matrixWorldInverse.equals( clonedCam.matrixWorldInverse ), "matrixWorldInverse is equal" );
				assert.ok( cam.projectionMatrix.equals( clonedCam.projectionMatrix ), "projectionMatrix is equal" );

			} );

			// OTHERS
			// TODO: this should not be here !!! This is Object3D stuff !!!
			QUnit.test( "lookAt", ( assert ) => {

				var cam = new Camera();
				cam.lookAt( new Vector3( 0, 1, - 1 ) );

				assert.numEqual( cam.rotation.x * ( 180 / Math.PI ), 45, "x is equal" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author szimek / https://github.com/szimek/
	 */

	var textureId = 0;

	function Texture( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {

		Object.defineProperty( this, 'id', { value: textureId ++ } );

		this.uuid = _Math.generateUUID();

		this.name = '';

		this.image = image !== undefined ? image : Texture.DEFAULT_IMAGE;
		this.mipmaps = [];

		this.mapping = mapping !== undefined ? mapping : Texture.DEFAULT_MAPPING;

		this.wrapS = wrapS !== undefined ? wrapS : ClampToEdgeWrapping;
		this.wrapT = wrapT !== undefined ? wrapT : ClampToEdgeWrapping;

		this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;
		this.minFilter = minFilter !== undefined ? minFilter : LinearMipMapLinearFilter;

		this.anisotropy = anisotropy !== undefined ? anisotropy : 1;

		this.format = format !== undefined ? format : RGBAFormat;
		this.type = type !== undefined ? type : UnsignedByteType;

		this.offset = new Vector2( 0, 0 );
		this.repeat = new Vector2( 1, 1 );
		this.center = new Vector2( 0, 0 );
		this.rotation = 0;

		this.matrixAutoUpdate = true;
		this.matrix = new Matrix3();

		this.generateMipmaps = true;
		this.premultiplyAlpha = false;
		this.flipY = true;
		this.unpackAlignment = 4;	// valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)

		// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.
		//
		// Also changing the encoding after already used by a Material will not automatically make the Material
		// update.  You need to explicitly call Material.needsUpdate to trigger it to recompile.
		this.encoding = encoding !== undefined ? encoding : LinearEncoding;

		this.version = 0;
		this.onUpdate = null;

	}

	Texture.DEFAULT_IMAGE = undefined;
	Texture.DEFAULT_MAPPING = UVMapping;

	Object.defineProperty( Texture.prototype, "needsUpdate", {

		set: function ( value ) {

			if ( value === true ) this.version ++;

		}

	} );

	Object.assign( Texture.prototype, EventDispatcher.prototype, {

		constructor: Texture,

		isTexture: true,

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( source ) {

			this.name = source.name;

			this.image = source.image;
			this.mipmaps = source.mipmaps.slice( 0 );

			this.mapping = source.mapping;

			this.wrapS = source.wrapS;
			this.wrapT = source.wrapT;

			this.magFilter = source.magFilter;
			this.minFilter = source.minFilter;

			this.anisotropy = source.anisotropy;

			this.format = source.format;
			this.type = source.type;

			this.offset.copy( source.offset );
			this.repeat.copy( source.repeat );
			this.center.copy( source.center );
			this.rotation = source.rotation;

			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrix.copy( source.matrix );

			this.generateMipmaps = source.generateMipmaps;
			this.premultiplyAlpha = source.premultiplyAlpha;
			this.flipY = source.flipY;
			this.unpackAlignment = source.unpackAlignment;
			this.encoding = source.encoding;

			return this;

		},

		toJSON: function ( meta ) {

			var isRootObject = ( meta === undefined || typeof meta === 'string' );

			if ( ! isRootObject && meta.textures[ this.uuid ] !== undefined ) {

				return meta.textures[ this.uuid ];

			}

			function getDataURL( image ) {

				var canvas;

				if ( image instanceof HTMLCanvasElement ) {

					canvas = image;

				} else {

					canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
					canvas.width = image.width;
					canvas.height = image.height;

					var context = canvas.getContext( '2d' );

					if ( image instanceof ImageData ) {

						context.putImageData( image, 0, 0 );

					} else {

						context.drawImage( image, 0, 0, image.width, image.height );

					}

				}

				if ( canvas.width > 2048 || canvas.height > 2048 ) {

					return canvas.toDataURL( 'image/jpeg', 0.6 );

				} else {

					return canvas.toDataURL( 'image/png' );

				}

			}

			var output = {
				metadata: {
					version: 4.5,
					type: 'Texture',
					generator: 'Texture.toJSON'
				},

				uuid: this.uuid,
				name: this.name,

				mapping: this.mapping,

				repeat: [ this.repeat.x, this.repeat.y ],
				offset: [ this.offset.x, this.offset.y ],
				center: [ this.center.x, this.center.y ],
				rotation: this.rotation,

				wrap: [ this.wrapS, this.wrapT ],

				minFilter: this.minFilter,
				magFilter: this.magFilter,
				anisotropy: this.anisotropy,

				flipY: this.flipY
			};

			if ( this.image !== undefined ) {

				// TODO: Move to THREE.Image

				var image = this.image;

				if ( image.uuid === undefined ) {

					image.uuid = _Math.generateUUID(); // UGH

				}

				if ( ! isRootObject && meta.images[ image.uuid ] === undefined ) {

					meta.images[ image.uuid ] = {
						uuid: image.uuid,
						url: getDataURL( image )
					};

				}

				output.image = image.uuid;

			}

			if ( ! isRootObject ) {

				meta.textures[ this.uuid ] = output;

			}

			return output;

		},

		dispose: function () {

			this.dispatchEvent( { type: 'dispose' } );

		},

		transformUv: function ( uv ) {

			if ( this.mapping !== UVMapping ) return;

			uv.applyMatrix3( this.matrix );

			if ( uv.x < 0 || uv.x > 1 ) {

				switch ( this.wrapS ) {

					case RepeatWrapping:

						uv.x = uv.x - Math.floor( uv.x );
						break;

					case ClampToEdgeWrapping:

						uv.x = uv.x < 0 ? 0 : 1;
						break;

					case MirroredRepeatWrapping:

						if ( Math.abs( Math.floor( uv.x ) % 2 ) === 1 ) {

							uv.x = Math.ceil( uv.x ) - uv.x;

						} else {

							uv.x = uv.x - Math.floor( uv.x );

						}
						break;

				}

			}

			if ( uv.y < 0 || uv.y > 1 ) {

				switch ( this.wrapT ) {

					case RepeatWrapping:

						uv.y = uv.y - Math.floor( uv.y );
						break;

					case ClampToEdgeWrapping:

						uv.y = uv.y < 0 ? 0 : 1;
						break;

					case MirroredRepeatWrapping:

						if ( Math.abs( Math.floor( uv.y ) % 2 ) === 1 ) {

							uv.y = Math.ceil( uv.y ) - uv.y;

						} else {

							uv.y = uv.y - Math.floor( uv.y );

						}
						break;

				}

			}

			if ( this.flipY ) {

				uv.y = 1 - uv.y;

			}

		}

	} );

	/**
	 * @author szimek / https://github.com/szimek/
	 * @author alteredq / http://alteredqualia.com/
	 * @author Marius Kintel / https://github.com/kintel
	 */

	/*
	 In options, we can specify:
	 * Texture parameters for an auto-generated target texture
	 * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers
	*/
	function WebGLRenderTarget( width, height, options ) {

		this.uuid = _Math.generateUUID();

		this.width = width;
		this.height = height;

		this.scissor = new Vector4( 0, 0, width, height );
		this.scissorTest = false;

		this.viewport = new Vector4( 0, 0, width, height );

		options = options || {};

		if ( options.minFilter === undefined ) options.minFilter = LinearFilter;

		this.texture = new Texture( undefined, undefined, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );

		this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
		this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : true;
		this.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;

	}

	Object.assign( WebGLRenderTarget.prototype, EventDispatcher.prototype, {

		isWebGLRenderTarget: true,

		setSize: function ( width, height ) {

			if ( this.width !== width || this.height !== height ) {

				this.width = width;
				this.height = height;

				this.dispose();

			}

			this.viewport.set( 0, 0, width, height );
			this.scissor.set( 0, 0, width, height );

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( source ) {

			this.width = source.width;
			this.height = source.height;

			this.viewport.copy( source.viewport );

			this.texture = source.texture.clone();

			this.depthBuffer = source.depthBuffer;
			this.stencilBuffer = source.stencilBuffer;
			this.depthTexture = source.depthTexture;

			return this;

		},

		dispose: function () {

			this.dispatchEvent( { type: 'dispose' } );

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Cameras', () => {

		QUnit.module.todo( 'CubeCamera', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author arose / http://github.com/arose
	 */

	function OrthographicCamera( left, right, top, bottom, near, far ) {

		Camera.call( this );

		this.type = 'OrthographicCamera';

		this.zoom = 1;
		this.view = null;

		this.left = left;
		this.right = right;
		this.top = top;
		this.bottom = bottom;

		this.near = ( near !== undefined ) ? near : 0.1;
		this.far = ( far !== undefined ) ? far : 2000;

		this.updateProjectionMatrix();

	}

	OrthographicCamera.prototype = Object.assign( Object.create( Camera.prototype ), {

		constructor: OrthographicCamera,

		isOrthographicCamera: true,

		copy: function ( source, recursive ) {

			Camera.prototype.copy.call( this, source, recursive );

			this.left = source.left;
			this.right = source.right;
			this.top = source.top;
			this.bottom = source.bottom;
			this.near = source.near;
			this.far = source.far;

			this.zoom = source.zoom;
			this.view = source.view === null ? null : Object.assign( {}, source.view );

			return this;

		},

		setViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {

			if ( this.view === null ) {

				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};

			}

			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;

			this.updateProjectionMatrix();

		},

		clearViewOffset: function () {

			if ( this.view !== null ) {

				this.view.enabled = false;

			}

			this.updateProjectionMatrix();

		},

		updateProjectionMatrix: function () {

			var dx = ( this.right - this.left ) / ( 2 * this.zoom );
			var dy = ( this.top - this.bottom ) / ( 2 * this.zoom );
			var cx = ( this.right + this.left ) / 2;
			var cy = ( this.top + this.bottom ) / 2;

			var left = cx - dx;
			var right = cx + dx;
			var top = cy + dy;
			var bottom = cy - dy;

			if ( this.view !== null && this.view.enabled ) {

				var zoomW = this.zoom / ( this.view.width / this.view.fullWidth );
				var zoomH = this.zoom / ( this.view.height / this.view.fullHeight );
				var scaleW = ( this.right - this.left ) / this.view.width;
				var scaleH = ( this.top - this.bottom ) / this.view.height;

				left += scaleW * ( this.view.offsetX / zoomW );
				right = left + scaleW * ( this.view.width / zoomW );
				top -= scaleH * ( this.view.offsetY / zoomH );
				bottom = top - scaleH * ( this.view.height / zoomH );

			}

			this.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far );

		},

		toJSON: function ( meta ) {

			var data = Object3D.prototype.toJSON.call( this, meta );

			data.object.zoom = this.zoom;
			data.object.left = this.left;
			data.object.right = this.right;
			data.object.top = this.top;
			data.object.bottom = this.bottom;
			data.object.near = this.near;
			data.object.far = this.far;

			if ( this.view !== null ) data.object.view = Object.assign( {}, this.view );

			return data;

		}

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Cameras', () => {

		QUnit.module.todo( 'OrthographicCamera', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isOrthographicCamera", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setViewOffset", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clearViewOffset", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateProjectionMatrix", ( assert ) => {

				var left = - 1, right = 1, top = 1, bottom = - 1, near = 1, far = 3;
				var cam = new OrthographicCamera( left, right, top, bottom, near, far );

				// updateProjectionMatrix is called in contructor
				var pMatrix = cam.projectionMatrix.elements;

				// orthographic projection is given my the 4x4 Matrix
				// 2/r-l		0			 0		-(l+r/r-l)
				//   0		2/t-b		 0		-(t+b/t-b)
				//   0			0		-2/f-n	-(f+n/f-n)
				//   0			0			 0				1

				assert.ok( pMatrix[ 0 ] === 2 / ( right - left ), "m[0,0] === 2 / (r - l)" );
				assert.ok( pMatrix[ 5 ] === 2 / ( top - bottom ), "m[1,1] === 2 / (t - b)" );
				assert.ok( pMatrix[ 10 ] === - 2 / ( far - near ), "m[2,2] === -2 / (f - n)" );
				assert.ok( pMatrix[ 12 ] === - ( ( right + left ) / ( right - left ) ), "m[3,0] === -(r+l/r-l)" );
				assert.ok( pMatrix[ 13 ] === - ( ( top + bottom ) / ( top - bottom ) ), "m[3,1] === -(t+b/b-t)" );
				assert.ok( pMatrix[ 14 ] === - ( ( far + near ) / ( far - near ) ), "m[3,2] === -(f+n/f-n)" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			// TODO: no no no clone is a camera methods that relied to copy method
			QUnit.test( "clone", ( assert ) => {

				var left = - 1.5, right = 1.5, top = 1, bottom = - 1, near = 0.1, far = 42;
				var cam = new OrthographicCamera( left, right, top, bottom, near, far );

				var clonedCam = cam.clone();

				assert.ok( cam.left === clonedCam.left, "left is equal" );
				assert.ok( cam.right === clonedCam.right, "right is equal" );
				assert.ok( cam.top === clonedCam.top, "top is equal" );
				assert.ok( cam.bottom === clonedCam.bottom, "bottom is equal" );
				assert.ok( cam.near === clonedCam.near, "near is equal" );
				assert.ok( cam.far === clonedCam.far, "far is equal" );
				assert.ok( cam.zoom === clonedCam.zoom, "zoom is equal" );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Cameras', () => {

		QUnit.module.todo( 'PerspectiveCamera', () => {

			// see e.g. math/Matrix4.js
			var matrixEquals4 = function ( a, b, tolerance ) {

				tolerance = tolerance || 0.0001;
				if ( a.elements.length != b.elements.length ) {

					return false;

				}
				for ( var i = 0, il = a.elements.length; i < il; i ++ ) {

					var delta = a.elements[ i ] - b.elements[ i ];
					if ( delta > tolerance ) {

						return false;

					}

				}

				return true;

			};

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isPerspectiveCamera", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFocalLength", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getFocalLength", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getEffectiveFOV", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getFilmWidth", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getFilmHeight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setViewOffset", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clearViewOffset", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateProjectionMatrix", ( assert ) => {

				var cam = new PerspectiveCamera( 75, 16 / 9, 0.1, 300.0 );

				// updateProjectionMatrix is called in contructor
				var m = cam.projectionMatrix;

				// perspective projection is given my the 4x4 Matrix
				// 2n/r-l		0			l+r/r-l				 0
				//   0		2n/t-b	t+b/t-b				 0
				//   0			0		-(f+n/f-n)	-(2fn/f-n)
				//   0			0				-1					 0

				// this matrix was calculated by hand via glMatrix.perspective(75, 16 / 9, 0.1, 300.0, pMatrix)
				// to get a reference matrix from plain WebGL
				var reference = new Matrix4().set(
					0.7330642938613892, 0, 0, 0,
					0, 1.3032253980636597, 0, 0,
					0, 0, - 1.000666856765747, - 0.2000666856765747,
					0, 0, - 1, 0
				);

				// assert.ok( reference.equals(m) );
				assert.ok( matrixEquals4( reference, m, 0.000001 ) );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			// TODO: no no no clone is a camera methods that relied to copy method
			QUnit.test( "clone", ( assert ) => {

				var near = 1,
					far = 3,
					aspect = 16 / 9,
					fov = 90;

				var cam = new PerspectiveCamera( fov, aspect, near, far );

				var clonedCam = cam.clone();

				assert.ok( cam.fov === clonedCam.fov, "fov is equal" );
				assert.ok( cam.aspect === clonedCam.aspect, "aspect is equal" );
				assert.ok( cam.near === clonedCam.near, "near is equal" );
				assert.ok( cam.far === clonedCam.far, "far is equal" );
				assert.ok( cam.zoom === clonedCam.zoom, "zoom is equal" );
				assert.ok( cam.projectionMatrix.equals( clonedCam.projectionMatrix ), "projectionMatrix is equal" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function StereoCamera() {

		this.type = 'StereoCamera';

		this.aspect = 1;

		this.eyeSep = 0.064;

		this.cameraL = new PerspectiveCamera();
		this.cameraL.layers.enable( 1 );
		this.cameraL.matrixAutoUpdate = false;

		this.cameraR = new PerspectiveCamera();
		this.cameraR.layers.enable( 2 );
		this.cameraR.matrixAutoUpdate = false;

	}

	Object.assign( StereoCamera.prototype, {

		update: ( function () {

			var instance, focus, fov, aspect, near, far, zoom, eyeSep;

			var eyeRight = new Matrix4();
			var eyeLeft = new Matrix4();

			return function update( camera ) {

				var needsUpdate = instance !== this || focus !== camera.focus || fov !== camera.fov ||
													aspect !== camera.aspect * this.aspect || near !== camera.near ||
													far !== camera.far || zoom !== camera.zoom || eyeSep !== this.eyeSep;

				if ( needsUpdate ) {

					instance = this;
					focus = camera.focus;
					fov = camera.fov;
					aspect = camera.aspect * this.aspect;
					near = camera.near;
					far = camera.far;
					zoom = camera.zoom;

					// Off-axis stereoscopic effect based on
					// http://paulbourke.net/stereographics/stereorender/

					var projectionMatrix = camera.projectionMatrix.clone();
					eyeSep = this.eyeSep / 2;
					var eyeSepOnProjection = eyeSep * near / focus;
					var ymax = ( near * Math.tan( _Math.DEG2RAD * fov * 0.5 ) ) / zoom;
					var xmin, xmax;

					// translate xOffset

					eyeLeft.elements[ 12 ] = - eyeSep;
					eyeRight.elements[ 12 ] = eyeSep;

					// for left eye

					xmin = - ymax * aspect + eyeSepOnProjection;
					xmax = ymax * aspect + eyeSepOnProjection;

					projectionMatrix.elements[ 0 ] = 2 * near / ( xmax - xmin );
					projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );

					this.cameraL.projectionMatrix.copy( projectionMatrix );

					// for right eye

					xmin = - ymax * aspect - eyeSepOnProjection;
					xmax = ymax * aspect - eyeSepOnProjection;

					projectionMatrix.elements[ 0 ] = 2 * near / ( xmax - xmin );
					projectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );

					this.cameraR.projectionMatrix.copy( projectionMatrix );

				}

				this.cameraL.matrixWorld.copy( camera.matrixWorld ).multiply( eyeLeft );
				this.cameraR.matrixWorld.copy( camera.matrixWorld ).multiply( eyeRight );

			};

		} )()

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Cameras', () => {

		QUnit.module.todo( 'StereoCamera', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'BufferAttribute', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.throws(
					function () {

						var a = new BufferAttribute( [ 1, 2, 3, 4 ], 2, false );

					},
					/array should be a Typed Array/,
					"Calling constructor with a simple array throws Error"
				);

			} );

			// PROPERTIES
			QUnit.test( "needsUpdate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isBufferAttribute", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setArray", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4 ] );
				var a = new BufferAttribute( f32a, 2, false );

				a.setArray( f32a, 2 );

				assert.strictEqual( a.count, 2, "Check item count" );
				assert.strictEqual( a.array, f32a, "Check array" );

				assert.throws(
					function () {

						a.setArray( [ 1, 2, 3, 4 ] );

					},
					/array should be a Typed Array/,
					"Calling setArray with a simple array throws Error"
				);

			} );

			QUnit.test( "setDynamic", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 );
				attr.setDynamic( true );
				attr.needsUpdate = true;

				var attrCopy = new BufferAttribute().copy( attr );

				assert.ok( attr.count === attrCopy.count, 'count is equal' );
				assert.ok( attr.itemSize === attrCopy.itemSize, 'itemSize is equal' );
				assert.ok( attr.dynamic === attrCopy.dynamic, 'dynamic is equal' );
				assert.ok( attr.array.length === attrCopy.array.length, 'array length is equal' );
				assert.ok( attr.version === 1 && attrCopy.version === 0, 'version is not copied which is good' );

			} );

			QUnit.test( "copyAt", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ), 3 );
				var attr2 = new BufferAttribute( new Float32Array( 9 ), 3 );

				attr2.copyAt( 1, attr, 2 );
				attr2.copyAt( 0, attr, 1 );
				attr2.copyAt( 2, attr, 0 );

				var i = attr.array;
				var i2 = attr2.array; // should be [4, 5, 6, 7, 8, 9, 1, 2, 3]

				assert.ok( i2[ 0 ] === i[ 3 ] && i2[ 1 ] === i[ 4 ] && i2[ 2 ] === i[ 5 ], 'chunck copied to correct place' );
				assert.ok( i2[ 3 ] === i[ 6 ] && i2[ 4 ] === i[ 7 ] && i2[ 5 ] === i[ 8 ], 'chunck copied to correct place' );
				assert.ok( i2[ 6 ] === i[ 0 ] && i2[ 7 ] === i[ 1 ] && i2[ 8 ] === i[ 2 ], 'chunck copied to correct place' );

			} );

			QUnit.test( "copyArray", ( assert ) => {

				var f32a = new Float32Array( [ 5, 6, 7, 8 ] );
				var a = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4 ] ), 2, false );

				a.copyArray( f32a );

				assert.deepEqual( a.array, f32a, "Check array has new values" );

			} );

			QUnit.test( "copyColorsArray", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( 6 ), 3 );

				attr.copyColorsArray( [
					new Color( 0, 0.5, 1 ),
					new Color( 0.25, 1, 0 )
				] );

				var i = attr.array;
				assert.ok( i[ 0 ] === 0 && i[ 1 ] === 0.5 && i[ 2 ] === 1, 'first color was copied correctly' );
				assert.ok( i[ 3 ] === 0.25 && i[ 4 ] === 1 && i[ 5 ] === 0, 'second color was copied correctly' );

			} );

			QUnit.test( "copyIndicesArray", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( 6 ), 3 );

				attr.copyIndicesArray( [
					{
						a: 1,
						b: 2,
						c: 3
					},
					{
						a: 4,
						b: 5,
						c: 6
					}
				] );

				var i = attr.array;
				assert.ok( i[ 0 ] === 1 && i[ 1 ] === 2 && i[ 2 ] === 3, 'first indices were copied correctly' );
				assert.ok( i[ 3 ] === 4 && i[ 4 ] === 5 && i[ 5 ] === 6, 'second indices were copied correctly' );

			} );

			QUnit.test( "copyVector2sArray", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( 4 ), 2 );

				attr.copyVector2sArray( [
					new Vector2( 1, 2 ),
					new Vector2( 4, 5 )
				] );

				var i = attr.array;
				assert.ok( i[ 0 ] === 1 && i[ 1 ] === 2, 'first vector was copied correctly' );
				assert.ok( i[ 2 ] === 4 && i[ 3 ] === 5, 'second vector was copied correctly' );

			} );

			QUnit.test( "copyVector3sArray", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( 6 ), 2 );

				attr.copyVector3sArray( [
					new Vector3( 1, 2, 3 ),
					new Vector3( 10, 20, 30 )
				] );

				var i = attr.array;
				assert.ok( i[ 0 ] === 1 && i[ 1 ] === 2 && i[ 2 ] === 3, 'first vector was copied correctly' );
				assert.ok( i[ 3 ] === 10 && i[ 4 ] === 20 && i[ 5 ] === 30, 'second vector was copied correctly' );

			} );

			QUnit.test( "copyVector4sArray", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( 8 ), 2 );

				attr.copyVector4sArray( [
					new Vector4( 1, 2, 3, 4 ),
					new Vector4( 10, 20, 30, 40 )
				] );

				var i = attr.array;
				assert.ok( i[ 0 ] === 1 && i[ 1 ] === 2 && i[ 2 ] === 3 && i[ 3 ] === 4, 'first vector was copied correctly' );
				assert.ok( i[ 4 ] === 10 && i[ 5 ] === 20 && i[ 6 ] === 30 && i[ 7 ] === 40, 'second vector was copied correctly' );

			} );

			QUnit.test( "set", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4 ] );
				var a = new BufferAttribute( f32a, 2, false );
				var expected = new Float32Array( [ 9, 2, 8, 4 ] );

				a.set( [ 9 ] );
				a.set( [ 8 ], 2 );

				assert.deepEqual( a.array, expected, "Check array has expected values" );

			} );

			QUnit.test( "set[X, Y, Z, W, XYZ, XYZW]/get[X, Y, Z, W]", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4, 5, 6, 7, 8 ] );
				var a = new BufferAttribute( f32a, 4, false );
				var expected = new Float32Array( [ 1, 2, - 3, - 4, - 5, - 6, 7, 8 ] );

				a.setX( 1, a.getX( 1 ) * - 1 );
				a.setY( 1, a.getY( 1 ) * - 1 );
				a.setZ( 0, a.getZ( 0 ) * - 1 );
				a.setW( 0, a.getW( 0 ) * - 1 );

				assert.deepEqual( a.array, expected, "Check all set* calls set the correct values" );

			} );

			QUnit.test( "setXY", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4 ] );
				var a = new BufferAttribute( f32a, 2, false );
				var expected = new Float32Array( [ - 1, - 2, 3, 4 ] );

				a.setXY( 0, - 1, - 2 );

				assert.deepEqual( a.array, expected, "Check for the correct values" );

			} );

			QUnit.test( "setXYZ", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4, 5, 6 ] );
				var a = new BufferAttribute( f32a, 3, false );
				var expected = new Float32Array( [ 1, 2, 3, - 4, - 5, - 6 ] );

				a.setXYZ( 1, - 4, - 5, - 6 );

				assert.deepEqual( a.array, expected, "Check for the correct values" );

			} );

			QUnit.test( "setXYZW", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4 ] );
				var a = new BufferAttribute( f32a, 4, false );
				var expected = new Float32Array( [ - 1, - 2, - 3, - 4 ] );

				a.setXYZW( 0, - 1, - 2, - 3, - 4 );

				assert.deepEqual( a.array, expected, "Check for the correct values" );

			} );

			QUnit.test( "onUpload", ( assert ) => {

				var a = new BufferAttribute();
				var func = function () { };

				a.onUpload( func );

				assert.strictEqual( a.onUploadCallback, func, "Check callback was set properly" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 0.12, - 12 ] ), 2 );
				var attrCopy = attr.clone();

				assert.ok( attr.array.length === attrCopy.array.length, 'attribute was cloned' );
				for ( var i = 0; i < attr.array.length; i ++ ) {

					assert.ok( attr.array[ i ] === attrCopy.array[ i ], 'array item is equal' );

				}

			} );

			// OTHERS
			QUnit.test( "count", ( assert ) => {

				assert.ok(
					new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 ).count === 2,
					'count is equal to the number of chunks'
				);

			} );

		} );

		QUnit.module.todo( 'Int8BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Uint8BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Uint8ClampedBufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Int16BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Uint16BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Int32BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Uint32BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Float32BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'Float64BufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	var Cache = {

		enabled: false,

		files: {},

		add: function ( key, file ) {

			if ( this.enabled === false ) return;

			// console.log( 'THREE.Cache', 'Adding key:', key );

			this.files[ key ] = file;

		},

		get: function ( key ) {

			if ( this.enabled === false ) return;

			// console.log( 'THREE.Cache', 'Checking key:', key );

			return this.files[ key ];

		},

		remove: function ( key ) {

			delete this.files[ key ];

		},

		clear: function () {

			this.files = {};

		}

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function LoadingManager( onLoad, onProgress, onError ) {

		var scope = this;

		var isLoading = false;
		var itemsLoaded = 0;
		var itemsTotal = 0;
		var urlModifier = undefined;

		this.onStart = undefined;
		this.onLoad = onLoad;
		this.onProgress = onProgress;
		this.onError = onError;

		this.itemStart = function ( url ) {

			itemsTotal ++;

			if ( isLoading === false ) {

				if ( scope.onStart !== undefined ) {

					scope.onStart( url, itemsLoaded, itemsTotal );

				}

			}

			isLoading = true;

		};

		this.itemEnd = function ( url ) {

			itemsLoaded ++;

			if ( scope.onProgress !== undefined ) {

				scope.onProgress( url, itemsLoaded, itemsTotal );

			}

			if ( itemsLoaded === itemsTotal ) {

				isLoading = false;

				if ( scope.onLoad !== undefined ) {

					scope.onLoad();

				}

			}

		};

		this.itemError = function ( url ) {

			if ( scope.onError !== undefined ) {

				scope.onError( url );

			}

		};

		this.resolveURL = function ( url ) {

			if ( urlModifier ) {

				return urlModifier( url );

			}

			return url;

		};

		this.setURLModifier = function ( transform ) {

			urlModifier = transform;

		};

	}

	var DefaultLoadingManager = new LoadingManager();

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	var loading = {};

	function FileLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( FileLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			if ( url === undefined ) url = '';

			if ( this.path !== undefined ) url = this.path + url;

			url = this.manager.resolveURL( url );

			var scope = this;

			var cached = Cache.get( url );

			if ( cached !== undefined ) {

				scope.manager.itemStart( url );

				setTimeout( function () {

					if ( onLoad ) onLoad( cached );

					scope.manager.itemEnd( url );

				}, 0 );

				return cached;

			}

			// Check if request is duplicate

			if ( loading[ url ] !== undefined ) {

				loading[ url ].push( {

					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError

				} );

				return;

			}

			// Check for data: URI
			var dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;
			var dataUriRegexResult = url.match( dataUriRegex );

			// Safari can not handle Data URIs through XMLHttpRequest so process manually
			if ( dataUriRegexResult ) {

				var mimeType = dataUriRegexResult[ 1 ];
				var isBase64 = !! dataUriRegexResult[ 2 ];
				var data = dataUriRegexResult[ 3 ];

				data = window.decodeURIComponent( data );

				if ( isBase64 ) data = window.atob( data );

				try {

					var response;
					var responseType = ( this.responseType || '' ).toLowerCase();

					switch ( responseType ) {

						case 'arraybuffer':
						case 'blob':

							var view = new Uint8Array( data.length );

							for ( var i = 0; i < data.length; i ++ ) {

								view[ i ] = data.charCodeAt( i );

							}

							if ( responseType === 'blob' ) {

								response = new Blob( [ view.buffer ], { type: mimeType } );

							} else {

								response = view.buffer;

							}

							break;

						case 'document':

							var parser = new DOMParser();
							response = parser.parseFromString( data, mimeType );

							break;

						case 'json':

							response = JSON.parse( data );

							break;

						default: // 'text' or other

							response = data;

							break;

					}

					// Wait for next browser tick like standard XMLHttpRequest event dispatching does
					window.setTimeout( function () {

						if ( onLoad ) onLoad( response );

						scope.manager.itemEnd( url );

					}, 0 );

				} catch ( error ) {

					// Wait for next browser tick like standard XMLHttpRequest event dispatching does
					window.setTimeout( function () {

						if ( onError ) onError( error );

						scope.manager.itemEnd( url );
						scope.manager.itemError( url );

					}, 0 );

				}

			} else {

				// Initialise array for duplicate requests

				loading[ url ] = [];

				loading[ url ].push( {

					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError

				} );

				var request = new XMLHttpRequest();

				request.open( 'GET', url, true );

				request.addEventListener( 'load', function ( event ) {

					var response = event.target.response;

					Cache.add( url, response );

					var callbacks = loading[ url ];

					delete loading[ url ];

					if ( this.status === 200 ) {

						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

							var callback = callbacks[ i ];
							if ( callback.onLoad ) callback.onLoad( response );

						}

						scope.manager.itemEnd( url );

					} else if ( this.status === 0 ) {

						// Some browsers return HTTP Status 0 when using non-http protocol
						// e.g. 'file://' or 'data://'. Handle as success.

						console.warn( 'THREE.FileLoader: HTTP Status 0 received.' );

						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

							var callback = callbacks[ i ];
							if ( callback.onLoad ) callback.onLoad( response );

						}

						scope.manager.itemEnd( url );

					} else {

						for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

							var callback = callbacks[ i ];
							if ( callback.onError ) callback.onError( event );

						}

						scope.manager.itemEnd( url );
						scope.manager.itemError( url );

					}

				}, false );

				request.addEventListener( 'progress', function ( event ) {

					var callbacks = loading[ url ];

					for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

						var callback = callbacks[ i ];
						if ( callback.onProgress ) callback.onProgress( event );

					}

				}, false );

				request.addEventListener( 'error', function ( event ) {

					var callbacks = loading[ url ];

					delete loading[ url ];

					for ( var i = 0, il = callbacks.length; i < il; i ++ ) {

						var callback = callbacks[ i ];
						if ( callback.onError ) callback.onError( event );

					}

					scope.manager.itemEnd( url );
					scope.manager.itemError( url );

				}, false );

				if ( this.responseType !== undefined ) request.responseType = this.responseType;
				if ( this.withCredentials !== undefined ) request.withCredentials = this.withCredentials;

				if ( request.overrideMimeType ) request.overrideMimeType( this.mimeType !== undefined ? this.mimeType : 'text/plain' );

				for ( var header in this.requestHeader ) {

					request.setRequestHeader( header, this.requestHeader[ header ] );

				}

				request.send( null );

			}

			scope.manager.itemStart( url );

			return request;

		},

		setPath: function ( value ) {

			this.path = value;
			return this;

		},

		setResponseType: function ( value ) {

			this.responseType = value;
			return this;

		},

		setWithCredentials: function ( value ) {

			this.withCredentials = value;
			return this;

		},

		setMimeType: function ( value ) {

			this.mimeType = value;
			return this;

		},

		setRequestHeader: function ( value ) {

			this.requestHeader = value;
			return this;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 *
	 * parameters = {
	 *  color: <THREE.Color>,
	 *  opacity: <float>
	 * }
	 */

	function ShadowMaterial( parameters ) {

		Material.call( this );

		this.type = 'ShadowMaterial';

		this.color = new Color( 0x000000 );
		this.opacity = 1.0;

		this.lights = true;
		this.transparent = true;

		this.setValues( parameters );

	}

	ShadowMaterial.prototype = Object.create( Material.prototype );
	ShadowMaterial.prototype.constructor = ShadowMaterial;

	ShadowMaterial.prototype.isShadowMaterial = true;

	/**
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *	uvOffset: new THREE.Vector2(),
	 *	uvScale: new THREE.Vector2()
	 * }
	 */

	function SpriteMaterial( parameters ) {

		Material.call( this );

		this.type = 'SpriteMaterial';

		this.color = new Color( 0xffffff );
		this.map = null;

		this.rotation = 0;

		this.fog = false;
		this.lights = false;

		this.setValues( parameters );

	}

	SpriteMaterial.prototype = Object.create( Material.prototype );
	SpriteMaterial.prototype.constructor = SpriteMaterial;
	SpriteMaterial.prototype.isSpriteMaterial = true;

	SpriteMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.color.copy( source.color );
		this.map = source.map;

		this.rotation = source.rotation;

		return this;

	};

	/**
	 * Uniform Utilities
	 */

	var UniformsUtils = {

		merge: function ( uniforms ) {

			var merged = {};

			for ( var u = 0; u < uniforms.length; u ++ ) {

				var tmp = this.clone( uniforms[ u ] );

				for ( var p in tmp ) {

					merged[ p ] = tmp[ p ];

				}

			}

			return merged;

		},

		clone: function ( uniforms_src ) {

			var uniforms_dst = {};

			for ( var u in uniforms_src ) {

				uniforms_dst[ u ] = {};

				for ( var p in uniforms_src[ u ] ) {

					var parameter_src = uniforms_src[ u ][ p ];

					if ( parameter_src && ( parameter_src.isColor ||
						parameter_src.isMatrix3 || parameter_src.isMatrix4 ||
						parameter_src.isVector2 || parameter_src.isVector3 || parameter_src.isVector4 ||
						parameter_src.isTexture ) ) {

						uniforms_dst[ u ][ p ] = parameter_src.clone();

					} else if ( Array.isArray( parameter_src ) ) {

						uniforms_dst[ u ][ p ] = parameter_src.slice();

					} else {

						uniforms_dst[ u ][ p ] = parameter_src;

					}

				}

			}

			return uniforms_dst;

		}

	};

	/**
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  defines: { "label" : "value" },
	 *  uniforms: { "parameter1": { value: 1.0 }, "parameter2": { value2: 2 } },
	 *
	 *  fragmentShader: <string>,
	 *  vertexShader: <string>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  lights: <bool>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */

	function ShaderMaterial( parameters ) {

		Material.call( this );

		this.type = 'ShaderMaterial';

		this.defines = {};
		this.uniforms = {};

		this.vertexShader = 'void main() {\n\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}';
		this.fragmentShader = 'void main() {\n\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}';

		this.linewidth = 1;

		this.wireframe = false;
		this.wireframeLinewidth = 1;

		this.fog = false; // set to use scene fog
		this.lights = false; // set to use scene lights
		this.clipping = false; // set to use user-defined clipping planes

		this.skinning = false; // set to use skinning attribute streams
		this.morphTargets = false; // set to use morph targets
		this.morphNormals = false; // set to use morph normals

		this.extensions = {
			derivatives: false, // set to use derivatives
			fragDepth: false, // set to use fragment depth values
			drawBuffers: false, // set to use draw buffers
			shaderTextureLOD: false // set to use shader texture LOD
		};

		// When rendered geometry doesn't include these attributes but the material does,
		// use these default values in WebGL. This avoids errors when buffer data is missing.
		this.defaultAttributeValues = {
			'color': [ 1, 1, 1 ],
			'uv': [ 0, 0 ],
			'uv2': [ 0, 0 ]
		};

		this.index0AttributeName = undefined;

		if ( parameters !== undefined ) {

			if ( parameters.attributes !== undefined ) {

				console.error( 'THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.' );

			}

			this.setValues( parameters );

		}

	}

	ShaderMaterial.prototype = Object.create( Material.prototype );
	ShaderMaterial.prototype.constructor = ShaderMaterial;

	ShaderMaterial.prototype.isShaderMaterial = true;

	ShaderMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.fragmentShader = source.fragmentShader;
		this.vertexShader = source.vertexShader;

		this.uniforms = UniformsUtils.clone( source.uniforms );

		this.defines = source.defines;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;

		this.lights = source.lights;
		this.clipping = source.clipping;

		this.skinning = source.skinning;

		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;

		this.extensions = source.extensions;

		return this;

	};

	ShaderMaterial.prototype.toJSON = function ( meta ) {

		var data = Material.prototype.toJSON.call( this, meta );

		data.uniforms = this.uniforms;
		data.vertexShader = this.vertexShader;
		data.fragmentShader = this.fragmentShader;

		return data;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function RawShaderMaterial( parameters ) {

		ShaderMaterial.call( this, parameters );

		this.type = 'RawShaderMaterial';

	}

	RawShaderMaterial.prototype = Object.create( ShaderMaterial.prototype );
	RawShaderMaterial.prototype.constructor = RawShaderMaterial;

	RawShaderMaterial.prototype.isRawShaderMaterial = true;

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  size: <float>,
	 *  sizeAttenuation: <bool>
	 * }
	 */

	function PointsMaterial( parameters ) {

		Material.call( this );

		this.type = 'PointsMaterial';

		this.color = new Color( 0xffffff );

		this.map = null;

		this.size = 1;
		this.sizeAttenuation = true;

		this.lights = false;

		this.setValues( parameters );

	}

	PointsMaterial.prototype = Object.create( Material.prototype );
	PointsMaterial.prototype.constructor = PointsMaterial;

	PointsMaterial.prototype.isPointsMaterial = true;

	PointsMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.color.copy( source.color );

		this.map = source.map;

		this.size = source.size;
		this.sizeAttenuation = source.sizeAttenuation;

		return this;

	};

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  roughness: <float>,
	 *  metalness: <float>,
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  emissive: <hex>,
	 *  emissiveIntensity: <float>
	 *  emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *  bumpMap: new THREE.Texture( <Image> ),
	 *  bumpScale: <float>,
	 *
	 *  normalMap: new THREE.Texture( <Image> ),
	 *  normalScale: <Vector2>,
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  roughnessMap: new THREE.Texture( <Image> ),
	 *
	 *  metalnessMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),
	 *  envMapIntensity: <float>
	 *
	 *  refractionRatio: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */

	function MeshStandardMaterial( parameters ) {

		Material.call( this );

		this.defines = { 'STANDARD': '' };

		this.type = 'MeshStandardMaterial';

		this.color = new Color( 0xffffff ); // diffuse
		this.roughness = 0.5;
		this.metalness = 0.5;

		this.map = null;

		this.lightMap = null;
		this.lightMapIntensity = 1.0;

		this.aoMap = null;
		this.aoMapIntensity = 1.0;

		this.emissive = new Color( 0x000000 );
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;

		this.bumpMap = null;
		this.bumpScale = 1;

		this.normalMap = null;
		this.normalScale = new Vector2( 1, 1 );

		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;

		this.roughnessMap = null;

		this.metalnessMap = null;

		this.alphaMap = null;

		this.envMap = null;
		this.envMapIntensity = 1.0;

		this.refractionRatio = 0.98;

		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';

		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;

		this.setValues( parameters );

	}

	MeshStandardMaterial.prototype = Object.create( Material.prototype );
	MeshStandardMaterial.prototype.constructor = MeshStandardMaterial;

	MeshStandardMaterial.prototype.isMeshStandardMaterial = true;

	MeshStandardMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.defines = { 'STANDARD': '' };

		this.color.copy( source.color );
		this.roughness = source.roughness;
		this.metalness = source.metalness;

		this.map = source.map;

		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;

		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;

		this.emissive.copy( source.emissive );
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;

		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;

		this.normalMap = source.normalMap;
		this.normalScale.copy( source.normalScale );

		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;

		this.roughnessMap = source.roughnessMap;

		this.metalnessMap = source.metalnessMap;

		this.alphaMap = source.alphaMap;

		this.envMap = source.envMap;
		this.envMapIntensity = source.envMapIntensity;

		this.refractionRatio = source.refractionRatio;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;

		return this;

	};

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *  reflectivity: <float>
	 * }
	 */

	function MeshPhysicalMaterial( parameters ) {

		MeshStandardMaterial.call( this );

		this.defines = { 'PHYSICAL': '' };

		this.type = 'MeshPhysicalMaterial';

		this.reflectivity = 0.5; // maps to F0 = 0.04

		this.clearCoat = 0.0;
		this.clearCoatRoughness = 0.0;

		this.setValues( parameters );

	}

	MeshPhysicalMaterial.prototype = Object.create( MeshStandardMaterial.prototype );
	MeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;

	MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;

	MeshPhysicalMaterial.prototype.copy = function ( source ) {

		MeshStandardMaterial.prototype.copy.call( this, source );

		this.defines = { 'PHYSICAL': '' };

		this.reflectivity = source.reflectivity;

		this.clearCoat = source.clearCoat;
		this.clearCoatRoughness = source.clearCoatRoughness;

		return this;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  specular: <hex>,
	 *  shininess: <float>,
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  emissive: <hex>,
	 *  emissiveIntensity: <float>
	 *  emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *  bumpMap: new THREE.Texture( <Image> ),
	 *  bumpScale: <float>,
	 *
	 *  normalMap: new THREE.Texture( <Image> ),
	 *  normalScale: <Vector2>,
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  specularMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
	 *  combine: THREE.Multiply,
	 *  reflectivity: <float>,
	 *  refractionRatio: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */

	function MeshPhongMaterial( parameters ) {

		Material.call( this );

		this.type = 'MeshPhongMaterial';

		this.color = new Color( 0xffffff ); // diffuse
		this.specular = new Color( 0x111111 );
		this.shininess = 30;

		this.map = null;

		this.lightMap = null;
		this.lightMapIntensity = 1.0;

		this.aoMap = null;
		this.aoMapIntensity = 1.0;

		this.emissive = new Color( 0x000000 );
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;

		this.bumpMap = null;
		this.bumpScale = 1;

		this.normalMap = null;
		this.normalScale = new Vector2( 1, 1 );

		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;

		this.specularMap = null;

		this.alphaMap = null;

		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;

		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';

		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;

		this.setValues( parameters );

	}

	MeshPhongMaterial.prototype = Object.create( Material.prototype );
	MeshPhongMaterial.prototype.constructor = MeshPhongMaterial;

	MeshPhongMaterial.prototype.isMeshPhongMaterial = true;

	MeshPhongMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.color.copy( source.color );
		this.specular.copy( source.specular );
		this.shininess = source.shininess;

		this.map = source.map;

		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;

		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;

		this.emissive.copy( source.emissive );
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;

		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;

		this.normalMap = source.normalMap;
		this.normalScale.copy( source.normalScale );

		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;

		this.specularMap = source.specularMap;

		this.alphaMap = source.alphaMap;

		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;

		return this;

	};

	/**
	 * @author takahirox / http://github.com/takahirox
	 *
	 * parameters = {
	 *  gradientMap: new THREE.Texture( <Image> )
	 * }
	 */

	function MeshToonMaterial( parameters ) {

		MeshPhongMaterial.call( this );

		this.defines = { 'TOON': '' };

		this.type = 'MeshToonMaterial';

		this.gradientMap = null;

		this.setValues( parameters );

	}

	MeshToonMaterial.prototype = Object.create( MeshPhongMaterial.prototype );
	MeshToonMaterial.prototype.constructor = MeshToonMaterial;

	MeshToonMaterial.prototype.isMeshToonMaterial = true;

	MeshToonMaterial.prototype.copy = function ( source ) {

		MeshPhongMaterial.prototype.copy.call( this, source );

		this.gradientMap = source.gradientMap;

		return this;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *  opacity: <float>,
	 *
	 *  bumpMap: new THREE.Texture( <Image> ),
	 *  bumpScale: <float>,
	 *
	 *  normalMap: new THREE.Texture( <Image> ),
	 *  normalScale: <Vector2>,
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */

	function MeshNormalMaterial( parameters ) {

		Material.call( this );

		this.type = 'MeshNormalMaterial';

		this.bumpMap = null;
		this.bumpScale = 1;

		this.normalMap = null;
		this.normalScale = new Vector2( 1, 1 );

		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;

		this.wireframe = false;
		this.wireframeLinewidth = 1;

		this.fog = false;
		this.lights = false;

		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;

		this.setValues( parameters );

	}

	MeshNormalMaterial.prototype = Object.create( Material.prototype );
	MeshNormalMaterial.prototype.constructor = MeshNormalMaterial;

	MeshNormalMaterial.prototype.isMeshNormalMaterial = true;

	MeshNormalMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.bumpMap = source.bumpMap;
		this.bumpScale = source.bumpScale;

		this.normalMap = source.normalMap;
		this.normalScale.copy( source.normalScale );

		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;

		return this;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  lightMap: new THREE.Texture( <Image> ),
	 *  lightMapIntensity: <float>
	 *
	 *  aoMap: new THREE.Texture( <Image> ),
	 *  aoMapIntensity: <float>
	 *
	 *  emissive: <hex>,
	 *  emissiveIntensity: <float>
	 *  emissiveMap: new THREE.Texture( <Image> ),
	 *
	 *  specularMap: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),
	 *  combine: THREE.Multiply,
	 *  reflectivity: <float>,
	 *  refractionRatio: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *  morphNormals: <bool>
	 * }
	 */

	function MeshLambertMaterial( parameters ) {

		Material.call( this );

		this.type = 'MeshLambertMaterial';

		this.color = new Color( 0xffffff ); // diffuse

		this.map = null;

		this.lightMap = null;
		this.lightMapIntensity = 1.0;

		this.aoMap = null;
		this.aoMapIntensity = 1.0;

		this.emissive = new Color( 0x000000 );
		this.emissiveIntensity = 1.0;
		this.emissiveMap = null;

		this.specularMap = null;

		this.alphaMap = null;

		this.envMap = null;
		this.combine = MultiplyOperation;
		this.reflectivity = 1;
		this.refractionRatio = 0.98;

		this.wireframe = false;
		this.wireframeLinewidth = 1;
		this.wireframeLinecap = 'round';
		this.wireframeLinejoin = 'round';

		this.skinning = false;
		this.morphTargets = false;
		this.morphNormals = false;

		this.setValues( parameters );

	}

	MeshLambertMaterial.prototype = Object.create( Material.prototype );
	MeshLambertMaterial.prototype.constructor = MeshLambertMaterial;

	MeshLambertMaterial.prototype.isMeshLambertMaterial = true;

	MeshLambertMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.color.copy( source.color );

		this.map = source.map;

		this.lightMap = source.lightMap;
		this.lightMapIntensity = source.lightMapIntensity;

		this.aoMap = source.aoMap;
		this.aoMapIntensity = source.aoMapIntensity;

		this.emissive.copy( source.emissive );
		this.emissiveMap = source.emissiveMap;
		this.emissiveIntensity = source.emissiveIntensity;

		this.specularMap = source.specularMap;

		this.alphaMap = source.alphaMap;

		this.envMap = source.envMap;
		this.combine = source.combine;
		this.reflectivity = source.reflectivity;
		this.refractionRatio = source.refractionRatio;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;
		this.wireframeLinecap = source.wireframeLinecap;
		this.wireframeLinejoin = source.wireframeLinejoin;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;
		this.morphNormals = source.morphNormals;

		return this;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author bhouston / https://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *
	 *  opacity: <float>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>,
	 *
	 *  wireframe: <boolean>,
	 *  wireframeLinewidth: <float>
	 * }
	 */

	function MeshDepthMaterial( parameters ) {

		Material.call( this );

		this.type = 'MeshDepthMaterial';

		this.depthPacking = BasicDepthPacking;

		this.skinning = false;
		this.morphTargets = false;

		this.map = null;

		this.alphaMap = null;

		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;

		this.wireframe = false;
		this.wireframeLinewidth = 1;

		this.fog = false;
		this.lights = false;

		this.setValues( parameters );

	}

	MeshDepthMaterial.prototype = Object.create( Material.prototype );
	MeshDepthMaterial.prototype.constructor = MeshDepthMaterial;

	MeshDepthMaterial.prototype.isMeshDepthMaterial = true;

	MeshDepthMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.depthPacking = source.depthPacking;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;

		this.map = source.map;

		this.alphaMap = source.alphaMap;

		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;

		this.wireframe = source.wireframe;
		this.wireframeLinewidth = source.wireframeLinewidth;

		return this;

	};

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * parameters = {
	 *
	 *  referencePosition: <float>,
	 *  nearDistance: <float>,
	 *  farDistance: <float>,
	 *
	 *  skinning: <bool>,
	 *  morphTargets: <bool>,
	 *
	 *  map: new THREE.Texture( <Image> ),
	 *
	 *  alphaMap: new THREE.Texture( <Image> ),
	 *
	 *  displacementMap: new THREE.Texture( <Image> ),
	 *  displacementScale: <float>,
	 *  displacementBias: <float>
	 *
	 * }
	 */

	function MeshDistanceMaterial( parameters ) {

		Material.call( this );

		this.type = 'MeshDistanceMaterial';

		this.referencePosition = new Vector3();
		this.nearDistance = 1;
		this.farDistance = 1000;

		this.skinning = false;
		this.morphTargets = false;

		this.map = null;

		this.alphaMap = null;

		this.displacementMap = null;
		this.displacementScale = 1;
		this.displacementBias = 0;

		this.fog = false;
		this.lights = false;

		this.setValues( parameters );

	}

	MeshDistanceMaterial.prototype = Object.create( Material.prototype );
	MeshDistanceMaterial.prototype.constructor = MeshDistanceMaterial;

	MeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;

	MeshDistanceMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.referencePosition.copy( source.referencePosition );
		this.nearDistance = source.nearDistance;
		this.farDistance = source.farDistance;

		this.skinning = source.skinning;
		this.morphTargets = source.morphTargets;

		this.map = source.map;

		this.alphaMap = source.alphaMap;

		this.displacementMap = source.displacementMap;
		this.displacementScale = source.displacementScale;
		this.displacementBias = source.displacementBias;

		return this;

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *
	 *  linewidth: <float>,
	 *  linecap: "round",
	 *  linejoin: "round"
	 * }
	 */

	function LineBasicMaterial( parameters ) {

		Material.call( this );

		this.type = 'LineBasicMaterial';

		this.color = new Color( 0xffffff );

		this.linewidth = 1;
		this.linecap = 'round';
		this.linejoin = 'round';

		this.lights = false;

		this.setValues( parameters );

	}

	LineBasicMaterial.prototype = Object.create( Material.prototype );
	LineBasicMaterial.prototype.constructor = LineBasicMaterial;

	LineBasicMaterial.prototype.isLineBasicMaterial = true;

	LineBasicMaterial.prototype.copy = function ( source ) {

		Material.prototype.copy.call( this, source );

		this.color.copy( source.color );

		this.linewidth = source.linewidth;
		this.linecap = source.linecap;
		this.linejoin = source.linejoin;

		return this;

	};

	/**
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * parameters = {
	 *  color: <hex>,
	 *  opacity: <float>,
	 *
	 *  linewidth: <float>,
	 *
	 *  scale: <float>,
	 *  dashSize: <float>,
	 *  gapSize: <float>
	 * }
	 */

	function LineDashedMaterial( parameters ) {

		LineBasicMaterial.call( this );

		this.type = 'LineDashedMaterial';

		this.scale = 1;
		this.dashSize = 3;
		this.gapSize = 1;

		this.setValues( parameters );

	}

	LineDashedMaterial.prototype = Object.create( LineBasicMaterial.prototype );
	LineDashedMaterial.prototype.constructor = LineDashedMaterial;

	LineDashedMaterial.prototype.isLineDashedMaterial = true;

	LineDashedMaterial.prototype.copy = function ( source ) {

		LineBasicMaterial.prototype.copy.call( this, source );

		this.scale = source.scale;
		this.dashSize = source.dashSize;
		this.gapSize = source.gapSize;

		return this;

	};



	var Materials = Object.freeze({
		ShadowMaterial: ShadowMaterial,
		SpriteMaterial: SpriteMaterial,
		RawShaderMaterial: RawShaderMaterial,
		ShaderMaterial: ShaderMaterial,
		PointsMaterial: PointsMaterial,
		MeshPhysicalMaterial: MeshPhysicalMaterial,
		MeshStandardMaterial: MeshStandardMaterial,
		MeshPhongMaterial: MeshPhongMaterial,
		MeshToonMaterial: MeshToonMaterial,
		MeshNormalMaterial: MeshNormalMaterial,
		MeshLambertMaterial: MeshLambertMaterial,
		MeshDepthMaterial: MeshDepthMaterial,
		MeshDistanceMaterial: MeshDistanceMaterial,
		MeshBasicMaterial: MeshBasicMaterial,
		LineDashedMaterial: LineDashedMaterial,
		LineBasicMaterial: LineBasicMaterial,
		Material: Material
	});

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function MaterialLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
		this.textures = {};

	}

	Object.assign( MaterialLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {

				onLoad( scope.parse( JSON.parse( text ) ) );

			}, onProgress, onError );

		},

		setTextures: function ( value ) {

			this.textures = value;

		},

		parse: function ( json ) {

			var textures = this.textures;

			function getTexture( name ) {

				if ( textures[ name ] === undefined ) {

					console.warn( 'THREE.MaterialLoader: Undefined texture', name );

				}

				return textures[ name ];

			}

			var material = new Materials[ json.type ]();

			if ( json.uuid !== undefined ) material.uuid = json.uuid;
			if ( json.name !== undefined ) material.name = json.name;
			if ( json.color !== undefined ) material.color.setHex( json.color );
			if ( json.roughness !== undefined ) material.roughness = json.roughness;
			if ( json.metalness !== undefined ) material.metalness = json.metalness;
			if ( json.emissive !== undefined ) material.emissive.setHex( json.emissive );
			if ( json.specular !== undefined ) material.specular.setHex( json.specular );
			if ( json.shininess !== undefined ) material.shininess = json.shininess;
			if ( json.clearCoat !== undefined ) material.clearCoat = json.clearCoat;
			if ( json.clearCoatRoughness !== undefined ) material.clearCoatRoughness = json.clearCoatRoughness;
			if ( json.uniforms !== undefined ) material.uniforms = json.uniforms;
			if ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;
			if ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;
			if ( json.vertexColors !== undefined ) material.vertexColors = json.vertexColors;
			if ( json.fog !== undefined ) material.fog = json.fog;
			if ( json.flatShading !== undefined ) material.flatShading = json.flatShading;
			if ( json.blending !== undefined ) material.blending = json.blending;
			if ( json.side !== undefined ) material.side = json.side;
			if ( json.opacity !== undefined ) material.opacity = json.opacity;
			if ( json.transparent !== undefined ) material.transparent = json.transparent;
			if ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;
			if ( json.depthTest !== undefined ) material.depthTest = json.depthTest;
			if ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;
			if ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;
			if ( json.wireframe !== undefined ) material.wireframe = json.wireframe;
			if ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;
			if ( json.wireframeLinecap !== undefined ) material.wireframeLinecap = json.wireframeLinecap;
			if ( json.wireframeLinejoin !== undefined ) material.wireframeLinejoin = json.wireframeLinejoin;

			if ( json.rotation !== undefined ) material.rotation = json.rotation;

			if ( json.linewidth !== 1 ) material.linewidth = json.linewidth;
			if ( json.dashSize !== undefined ) material.dashSize = json.dashSize;
			if ( json.gapSize !== undefined ) material.gapSize = json.gapSize;
			if ( json.scale !== undefined ) material.scale = json.scale;

			if ( json.skinning !== undefined ) material.skinning = json.skinning;
			if ( json.morphTargets !== undefined ) material.morphTargets = json.morphTargets;
			if ( json.dithering !== undefined ) material.dithering = json.dithering;

			if ( json.visible !== undefined ) material.visible = json.visible;
			if ( json.userData !== undefined ) material.userData = json.userData;

			// Deprecated

			if ( json.shading !== undefined ) material.flatShading = json.shading === 1; // THREE.FlatShading

			// for PointsMaterial

			if ( json.size !== undefined ) material.size = json.size;
			if ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;

			// maps

			if ( json.map !== undefined ) material.map = getTexture( json.map );

			if ( json.alphaMap !== undefined ) {

				material.alphaMap = getTexture( json.alphaMap );
				material.transparent = true;

			}

			if ( json.bumpMap !== undefined ) material.bumpMap = getTexture( json.bumpMap );
			if ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;

			if ( json.normalMap !== undefined ) material.normalMap = getTexture( json.normalMap );
			if ( json.normalScale !== undefined ) {

				var normalScale = json.normalScale;

				if ( Array.isArray( normalScale ) === false ) {

					// Blender exporter used to export a scalar. See #7459

					normalScale = [ normalScale, normalScale ];

				}

				material.normalScale = new Vector2().fromArray( normalScale );

			}

			if ( json.displacementMap !== undefined ) material.displacementMap = getTexture( json.displacementMap );
			if ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;
			if ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;

			if ( json.roughnessMap !== undefined ) material.roughnessMap = getTexture( json.roughnessMap );
			if ( json.metalnessMap !== undefined ) material.metalnessMap = getTexture( json.metalnessMap );

			if ( json.emissiveMap !== undefined ) material.emissiveMap = getTexture( json.emissiveMap );
			if ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;

			if ( json.specularMap !== undefined ) material.specularMap = getTexture( json.specularMap );

			if ( json.envMap !== undefined ) material.envMap = getTexture( json.envMap );

			if ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;

			if ( json.lightMap !== undefined ) material.lightMap = getTexture( json.lightMap );
			if ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;

			if ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );
			if ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;

			if ( json.gradientMap !== undefined ) material.gradientMap = getTexture( json.gradientMap );

			return material;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function ImageLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( ImageLoader.prototype, {

		crossOrigin: 'Anonymous',

		load: function ( url, onLoad, onProgress, onError ) {

			if ( url === undefined ) url = '';

			if ( this.path !== undefined ) url = this.path + url;

			url = this.manager.resolveURL( url );

			var scope = this;

			var cached = Cache.get( url );

			if ( cached !== undefined ) {

				scope.manager.itemStart( url );

				setTimeout( function () {

					if ( onLoad ) onLoad( cached );

					scope.manager.itemEnd( url );

				}, 0 );

				return cached;

			}

			var image = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'img' );

			image.addEventListener( 'load', function () {

				Cache.add( url, this );

				if ( onLoad ) onLoad( this );

				scope.manager.itemEnd( url );

			}, false );

			/*
			image.addEventListener( 'progress', function ( event ) {

				if ( onProgress ) onProgress( event );

			}, false );
			*/

			image.addEventListener( 'error', function ( event ) {

				if ( onError ) onError( event );

				scope.manager.itemEnd( url );
				scope.manager.itemError( url );

			}, false );

			if ( url.substr( 0, 5 ) !== 'data:' ) {

				if ( this.crossOrigin !== undefined ) image.crossOrigin = this.crossOrigin;

			}

			scope.manager.itemStart( url );

			image.src = url;

			return image;

		},

		setCrossOrigin: function ( value ) {

			this.crossOrigin = value;
			return this;

		},

		setPath: function ( value ) {

			this.path = value;
			return this;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function TextureLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( TextureLoader.prototype, {

		crossOrigin: 'Anonymous',

		load: function ( url, onLoad, onProgress, onError ) {

			var loader = new ImageLoader( this.manager );
			loader.setCrossOrigin( this.crossOrigin );
			loader.setPath( this.path );

			var texture = new Texture();
			texture.image = loader.load( url, function () {

				// JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.
				var isJPEG = url.search( /\.(jpg|jpeg)$/ ) > 0 || url.search( /^data\:image\/jpeg/ ) === 0;

				texture.format = isJPEG ? RGBFormat : RGBAFormat;
				texture.needsUpdate = true;

				if ( onLoad !== undefined ) {

					onLoad( texture );

				}

			}, onProgress, onError );

			return texture;

		},

		setCrossOrigin: function ( value ) {

			this.crossOrigin = value;
			return this;

		},

		setPath: function ( value ) {

			this.path = value;
			return this;

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Loader() {

		this.onLoadStart = function () {};
		this.onLoadProgress = function () {};
		this.onLoadComplete = function () {};

	}

	Loader.Handlers = {

		handlers: [],

		add: function ( regex, loader ) {

			this.handlers.push( regex, loader );

		},

		get: function ( file ) {

			var handlers = this.handlers;

			for ( var i = 0, l = handlers.length; i < l; i += 2 ) {

				var regex = handlers[ i ];
				var loader = handlers[ i + 1 ];

				if ( regex.test( file ) ) {

					return loader;

				}

			}

			return null;

		}

	};

	Object.assign( Loader.prototype, {

		crossOrigin: undefined,

		extractUrlBase: function ( url ) {

			var parts = url.split( '/' );

			if ( parts.length === 1 ) return './';

			parts.pop();

			return parts.join( '/' ) + '/';

		},

		initMaterials: function ( materials, texturePath, crossOrigin ) {

			var array = [];

			for ( var i = 0; i < materials.length; ++ i ) {

				array[ i ] = this.createMaterial( materials[ i ], texturePath, crossOrigin );

			}

			return array;

		},

		createMaterial: ( function () {

			var BlendingMode = {
				NoBlending: NoBlending,
				NormalBlending: NormalBlending,
				AdditiveBlending: AdditiveBlending,
				SubtractiveBlending: SubtractiveBlending,
				MultiplyBlending: MultiplyBlending,
				CustomBlending: CustomBlending
			};

			var color = new Color();
			var textureLoader = new TextureLoader();
			var materialLoader = new MaterialLoader();

			return function createMaterial( m, texturePath, crossOrigin ) {

				// convert from old material format

				var textures = {};

				function loadTexture( path, repeat, offset, wrap, anisotropy ) {

					var fullPath = texturePath + path;
					var loader = Loader.Handlers.get( fullPath );

					var texture;

					if ( loader !== null ) {

						texture = loader.load( fullPath );

					} else {

						textureLoader.setCrossOrigin( crossOrigin );
						texture = textureLoader.load( fullPath );

					}

					if ( repeat !== undefined ) {

						texture.repeat.fromArray( repeat );

						if ( repeat[ 0 ] !== 1 ) texture.wrapS = RepeatWrapping;
						if ( repeat[ 1 ] !== 1 ) texture.wrapT = RepeatWrapping;

					}

					if ( offset !== undefined ) {

						texture.offset.fromArray( offset );

					}

					if ( wrap !== undefined ) {

						if ( wrap[ 0 ] === 'repeat' ) texture.wrapS = RepeatWrapping;
						if ( wrap[ 0 ] === 'mirror' ) texture.wrapS = MirroredRepeatWrapping;

						if ( wrap[ 1 ] === 'repeat' ) texture.wrapT = RepeatWrapping;
						if ( wrap[ 1 ] === 'mirror' ) texture.wrapT = MirroredRepeatWrapping;

					}

					if ( anisotropy !== undefined ) {

						texture.anisotropy = anisotropy;

					}

					var uuid = _Math.generateUUID();

					textures[ uuid ] = texture;

					return uuid;

				}

				//

				var json = {
					uuid: _Math.generateUUID(),
					type: 'MeshLambertMaterial'
				};

				for ( var name in m ) {

					var value = m[ name ];

					switch ( name ) {

						case 'DbgColor':
						case 'DbgIndex':
						case 'opticalDensity':
						case 'illumination':
							break;
						case 'DbgName':
							json.name = value;
							break;
						case 'blending':
							json.blending = BlendingMode[ value ];
							break;
						case 'colorAmbient':
						case 'mapAmbient':
							console.warn( 'THREE.Loader.createMaterial:', name, 'is no longer supported.' );
							break;
						case 'colorDiffuse':
							json.color = color.fromArray( value ).getHex();
							break;
						case 'colorSpecular':
							json.specular = color.fromArray( value ).getHex();
							break;
						case 'colorEmissive':
							json.emissive = color.fromArray( value ).getHex();
							break;
						case 'specularCoef':
							json.shininess = value;
							break;
						case 'shading':
							if ( value.toLowerCase() === 'basic' ) json.type = 'MeshBasicMaterial';
							if ( value.toLowerCase() === 'phong' ) json.type = 'MeshPhongMaterial';
							if ( value.toLowerCase() === 'standard' ) json.type = 'MeshStandardMaterial';
							break;
						case 'mapDiffuse':
							json.map = loadTexture( value, m.mapDiffuseRepeat, m.mapDiffuseOffset, m.mapDiffuseWrap, m.mapDiffuseAnisotropy );
							break;
						case 'mapDiffuseRepeat':
						case 'mapDiffuseOffset':
						case 'mapDiffuseWrap':
						case 'mapDiffuseAnisotropy':
							break;
						case 'mapEmissive':
							json.emissiveMap = loadTexture( value, m.mapEmissiveRepeat, m.mapEmissiveOffset, m.mapEmissiveWrap, m.mapEmissiveAnisotropy );
							break;
						case 'mapEmissiveRepeat':
						case 'mapEmissiveOffset':
						case 'mapEmissiveWrap':
						case 'mapEmissiveAnisotropy':
							break;
						case 'mapLight':
							json.lightMap = loadTexture( value, m.mapLightRepeat, m.mapLightOffset, m.mapLightWrap, m.mapLightAnisotropy );
							break;
						case 'mapLightRepeat':
						case 'mapLightOffset':
						case 'mapLightWrap':
						case 'mapLightAnisotropy':
							break;
						case 'mapAO':
							json.aoMap = loadTexture( value, m.mapAORepeat, m.mapAOOffset, m.mapAOWrap, m.mapAOAnisotropy );
							break;
						case 'mapAORepeat':
						case 'mapAOOffset':
						case 'mapAOWrap':
						case 'mapAOAnisotropy':
							break;
						case 'mapBump':
							json.bumpMap = loadTexture( value, m.mapBumpRepeat, m.mapBumpOffset, m.mapBumpWrap, m.mapBumpAnisotropy );
							break;
						case 'mapBumpScale':
							json.bumpScale = value;
							break;
						case 'mapBumpRepeat':
						case 'mapBumpOffset':
						case 'mapBumpWrap':
						case 'mapBumpAnisotropy':
							break;
						case 'mapNormal':
							json.normalMap = loadTexture( value, m.mapNormalRepeat, m.mapNormalOffset, m.mapNormalWrap, m.mapNormalAnisotropy );
							break;
						case 'mapNormalFactor':
							json.normalScale = [ value, value ];
							break;
						case 'mapNormalRepeat':
						case 'mapNormalOffset':
						case 'mapNormalWrap':
						case 'mapNormalAnisotropy':
							break;
						case 'mapSpecular':
							json.specularMap = loadTexture( value, m.mapSpecularRepeat, m.mapSpecularOffset, m.mapSpecularWrap, m.mapSpecularAnisotropy );
							break;
						case 'mapSpecularRepeat':
						case 'mapSpecularOffset':
						case 'mapSpecularWrap':
						case 'mapSpecularAnisotropy':
							break;
						case 'mapMetalness':
							json.metalnessMap = loadTexture( value, m.mapMetalnessRepeat, m.mapMetalnessOffset, m.mapMetalnessWrap, m.mapMetalnessAnisotropy );
							break;
						case 'mapMetalnessRepeat':
						case 'mapMetalnessOffset':
						case 'mapMetalnessWrap':
						case 'mapMetalnessAnisotropy':
							break;
						case 'mapRoughness':
							json.roughnessMap = loadTexture( value, m.mapRoughnessRepeat, m.mapRoughnessOffset, m.mapRoughnessWrap, m.mapRoughnessAnisotropy );
							break;
						case 'mapRoughnessRepeat':
						case 'mapRoughnessOffset':
						case 'mapRoughnessWrap':
						case 'mapRoughnessAnisotropy':
							break;
						case 'mapAlpha':
							json.alphaMap = loadTexture( value, m.mapAlphaRepeat, m.mapAlphaOffset, m.mapAlphaWrap, m.mapAlphaAnisotropy );
							break;
						case 'mapAlphaRepeat':
						case 'mapAlphaOffset':
						case 'mapAlphaWrap':
						case 'mapAlphaAnisotropy':
							break;
						case 'flipSided':
							json.side = BackSide;
							break;
						case 'doubleSided':
							json.side = DoubleSide;
							break;
						case 'transparency':
							console.warn( 'THREE.Loader.createMaterial: transparency has been renamed to opacity' );
							json.opacity = value;
							break;
						case 'depthTest':
						case 'depthWrite':
						case 'colorWrite':
						case 'opacity':
						case 'reflectivity':
						case 'transparent':
						case 'visible':
						case 'wireframe':
							json[ name ] = value;
							break;
						case 'vertexColors':
							if ( value === true ) json.vertexColors = VertexColors;
							if ( value === 'face' ) json.vertexColors = FaceColors;
							break;
						default:
							console.error( 'THREE.Loader.createMaterial: Unsupported', name, value );
							break;

					}

				}

				if ( json.type === 'MeshBasicMaterial' ) delete json.emissive;
				if ( json.type !== 'MeshPhongMaterial' ) delete json.specular;

				if ( json.opacity < 1 ) json.transparent = true;

				materialLoader.setTextures( textures );

				return materialLoader.parse( json );

			};

		} )()

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function JSONLoader( manager ) {

		if ( typeof manager === 'boolean' ) {

			console.warn( 'THREE.JSONLoader: showStatus parameter has been removed from constructor.' );
			manager = undefined;

		}

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

		this.withCredentials = false;

	}

	Object.assign( JSONLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var texturePath = this.texturePath && ( typeof this.texturePath === "string" ) ? this.texturePath : Loader.prototype.extractUrlBase( url );

			var loader = new FileLoader( this.manager );
			loader.setWithCredentials( this.withCredentials );
			loader.load( url, function ( text ) {

				var json = JSON.parse( text );
				var metadata = json.metadata;

				if ( metadata !== undefined ) {

					var type = metadata.type;

					if ( type !== undefined ) {

						if ( type.toLowerCase() === 'object' ) {

							console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.ObjectLoader instead.' );
							return;

						}

						if ( type.toLowerCase() === 'scene' ) {

							console.error( 'THREE.JSONLoader: ' + url + ' should be loaded with THREE.SceneLoader instead.' );
							return;

						}

					}

				}

				var object = scope.parse( json, texturePath );
				onLoad( object.geometry, object.materials );

			}, onProgress, onError );

		},

		setTexturePath: function ( value ) {

			this.texturePath = value;

		},

		parse: ( function () {

			function parseModel( json, geometry ) {

				function isBitSet( value, position ) {

					return value & ( 1 << position );

				}

				var i, j, fi,

					offset, zLength,

					colorIndex, normalIndex, uvIndex, materialIndex,

					type,
					isQuad,
					hasMaterial,
					hasFaceVertexUv,
					hasFaceNormal, hasFaceVertexNormal,
					hasFaceColor, hasFaceVertexColor,

					vertex, face, faceA, faceB, hex, normal,

					uvLayer, uv, u, v,

					faces = json.faces,
					vertices = json.vertices,
					normals = json.normals,
					colors = json.colors,

					scale = json.scale,

					nUvLayers = 0;


				if ( json.uvs !== undefined ) {

					// disregard empty arrays

					for ( i = 0; i < json.uvs.length; i ++ ) {

						if ( json.uvs[ i ].length ) nUvLayers ++;

					}

					for ( i = 0; i < nUvLayers; i ++ ) {

						geometry.faceVertexUvs[ i ] = [];

					}

				}

				offset = 0;
				zLength = vertices.length;

				while ( offset < zLength ) {

					vertex = new Vector3();

					vertex.x = vertices[ offset ++ ] * scale;
					vertex.y = vertices[ offset ++ ] * scale;
					vertex.z = vertices[ offset ++ ] * scale;

					geometry.vertices.push( vertex );

				}

				offset = 0;
				zLength = faces.length;

				while ( offset < zLength ) {

					type = faces[ offset ++ ];

					isQuad = isBitSet( type, 0 );
					hasMaterial = isBitSet( type, 1 );
					hasFaceVertexUv = isBitSet( type, 3 );
					hasFaceNormal = isBitSet( type, 4 );
					hasFaceVertexNormal = isBitSet( type, 5 );
					hasFaceColor = isBitSet( type, 6 );
					hasFaceVertexColor = isBitSet( type, 7 );

					// console.log("type", type, "bits", isQuad, hasMaterial, hasFaceVertexUv, hasFaceNormal, hasFaceVertexNormal, hasFaceColor, hasFaceVertexColor);

					if ( isQuad ) {

						faceA = new Face3();
						faceA.a = faces[ offset ];
						faceA.b = faces[ offset + 1 ];
						faceA.c = faces[ offset + 3 ];

						faceB = new Face3();
						faceB.a = faces[ offset + 1 ];
						faceB.b = faces[ offset + 2 ];
						faceB.c = faces[ offset + 3 ];

						offset += 4;

						if ( hasMaterial ) {

							materialIndex = faces[ offset ++ ];
							faceA.materialIndex = materialIndex;
							faceB.materialIndex = materialIndex;

						}

						// to get face <=> uv index correspondence

						fi = geometry.faces.length;

						if ( hasFaceVertexUv ) {

							for ( i = 0; i < nUvLayers; i ++ ) {

								uvLayer = json.uvs[ i ];

								geometry.faceVertexUvs[ i ][ fi ] = [];
								geometry.faceVertexUvs[ i ][ fi + 1 ] = [];

								for ( j = 0; j < 4; j ++ ) {

									uvIndex = faces[ offset ++ ];

									u = uvLayer[ uvIndex * 2 ];
									v = uvLayer[ uvIndex * 2 + 1 ];

									uv = new Vector2( u, v );

									if ( j !== 2 ) geometry.faceVertexUvs[ i ][ fi ].push( uv );
									if ( j !== 0 ) geometry.faceVertexUvs[ i ][ fi + 1 ].push( uv );

								}

							}

						}

						if ( hasFaceNormal ) {

							normalIndex = faces[ offset ++ ] * 3;

							faceA.normal.set(
								normals[ normalIndex ++ ],
								normals[ normalIndex ++ ],
								normals[ normalIndex ]
							);

							faceB.normal.copy( faceA.normal );

						}

						if ( hasFaceVertexNormal ) {

							for ( i = 0; i < 4; i ++ ) {

								normalIndex = faces[ offset ++ ] * 3;

								normal = new Vector3(
									normals[ normalIndex ++ ],
									normals[ normalIndex ++ ],
									normals[ normalIndex ]
								);


								if ( i !== 2 ) faceA.vertexNormals.push( normal );
								if ( i !== 0 ) faceB.vertexNormals.push( normal );

							}

						}


						if ( hasFaceColor ) {

							colorIndex = faces[ offset ++ ];
							hex = colors[ colorIndex ];

							faceA.color.setHex( hex );
							faceB.color.setHex( hex );

						}


						if ( hasFaceVertexColor ) {

							for ( i = 0; i < 4; i ++ ) {

								colorIndex = faces[ offset ++ ];
								hex = colors[ colorIndex ];

								if ( i !== 2 ) faceA.vertexColors.push( new Color( hex ) );
								if ( i !== 0 ) faceB.vertexColors.push( new Color( hex ) );

							}

						}

						geometry.faces.push( faceA );
						geometry.faces.push( faceB );

					} else {

						face = new Face3();
						face.a = faces[ offset ++ ];
						face.b = faces[ offset ++ ];
						face.c = faces[ offset ++ ];

						if ( hasMaterial ) {

							materialIndex = faces[ offset ++ ];
							face.materialIndex = materialIndex;

						}

						// to get face <=> uv index correspondence

						fi = geometry.faces.length;

						if ( hasFaceVertexUv ) {

							for ( i = 0; i < nUvLayers; i ++ ) {

								uvLayer = json.uvs[ i ];

								geometry.faceVertexUvs[ i ][ fi ] = [];

								for ( j = 0; j < 3; j ++ ) {

									uvIndex = faces[ offset ++ ];

									u = uvLayer[ uvIndex * 2 ];
									v = uvLayer[ uvIndex * 2 + 1 ];

									uv = new Vector2( u, v );

									geometry.faceVertexUvs[ i ][ fi ].push( uv );

								}

							}

						}

						if ( hasFaceNormal ) {

							normalIndex = faces[ offset ++ ] * 3;

							face.normal.set(
								normals[ normalIndex ++ ],
								normals[ normalIndex ++ ],
								normals[ normalIndex ]
							);

						}

						if ( hasFaceVertexNormal ) {

							for ( i = 0; i < 3; i ++ ) {

								normalIndex = faces[ offset ++ ] * 3;

								normal = new Vector3(
									normals[ normalIndex ++ ],
									normals[ normalIndex ++ ],
									normals[ normalIndex ]
								);

								face.vertexNormals.push( normal );

							}

						}


						if ( hasFaceColor ) {

							colorIndex = faces[ offset ++ ];
							face.color.setHex( colors[ colorIndex ] );

						}


						if ( hasFaceVertexColor ) {

							for ( i = 0; i < 3; i ++ ) {

								colorIndex = faces[ offset ++ ];
								face.vertexColors.push( new Color( colors[ colorIndex ] ) );

							}

						}

						geometry.faces.push( face );

					}

				}

			}

			function parseSkin( json, geometry ) {

				var influencesPerVertex = ( json.influencesPerVertex !== undefined ) ? json.influencesPerVertex : 2;

				if ( json.skinWeights ) {

					for ( var i = 0, l = json.skinWeights.length; i < l; i += influencesPerVertex ) {

						var x = json.skinWeights[ i ];
						var y = ( influencesPerVertex > 1 ) ? json.skinWeights[ i + 1 ] : 0;
						var z = ( influencesPerVertex > 2 ) ? json.skinWeights[ i + 2 ] : 0;
						var w = ( influencesPerVertex > 3 ) ? json.skinWeights[ i + 3 ] : 0;

						geometry.skinWeights.push( new Vector4( x, y, z, w ) );

					}

				}

				if ( json.skinIndices ) {

					for ( var i = 0, l = json.skinIndices.length; i < l; i += influencesPerVertex ) {

						var a = json.skinIndices[ i ];
						var b = ( influencesPerVertex > 1 ) ? json.skinIndices[ i + 1 ] : 0;
						var c = ( influencesPerVertex > 2 ) ? json.skinIndices[ i + 2 ] : 0;
						var d = ( influencesPerVertex > 3 ) ? json.skinIndices[ i + 3 ] : 0;

						geometry.skinIndices.push( new Vector4( a, b, c, d ) );

					}

				}

				geometry.bones = json.bones;

				if ( geometry.bones && geometry.bones.length > 0 && ( geometry.skinWeights.length !== geometry.skinIndices.length || geometry.skinIndices.length !== geometry.vertices.length ) ) {

					console.warn( 'When skinning, number of vertices (' + geometry.vertices.length + '), skinIndices (' +
						geometry.skinIndices.length + '), and skinWeights (' + geometry.skinWeights.length + ') should match.' );

				}

			}

			function parseMorphing( json, geometry ) {

				var scale = json.scale;

				if ( json.morphTargets !== undefined ) {

					for ( var i = 0, l = json.morphTargets.length; i < l; i ++ ) {

						geometry.morphTargets[ i ] = {};
						geometry.morphTargets[ i ].name = json.morphTargets[ i ].name;
						geometry.morphTargets[ i ].vertices = [];

						var dstVertices = geometry.morphTargets[ i ].vertices;
						var srcVertices = json.morphTargets[ i ].vertices;

						for ( var v = 0, vl = srcVertices.length; v < vl; v += 3 ) {

							var vertex = new Vector3();
							vertex.x = srcVertices[ v ] * scale;
							vertex.y = srcVertices[ v + 1 ] * scale;
							vertex.z = srcVertices[ v + 2 ] * scale;

							dstVertices.push( vertex );

						}

					}

				}

				if ( json.morphColors !== undefined && json.morphColors.length > 0 ) {

					console.warn( 'THREE.JSONLoader: "morphColors" no longer supported. Using them as face colors.' );

					var faces = geometry.faces;
					var morphColors = json.morphColors[ 0 ].colors;

					for ( var i = 0, l = faces.length; i < l; i ++ ) {

						faces[ i ].color.fromArray( morphColors, i * 3 );

					}

				}

			}

			function parseAnimations( json, geometry ) {

				var outputAnimations = [];

				// parse old style Bone/Hierarchy animations
				var animations = [];

				if ( json.animation !== undefined ) {

					animations.push( json.animation );

				}

				if ( json.animations !== undefined ) {

					if ( json.animations.length ) {

						animations = animations.concat( json.animations );

					} else {

						animations.push( json.animations );

					}

				}

				for ( var i = 0; i < animations.length; i ++ ) {

					var clip = AnimationClip.parseAnimation( animations[ i ], geometry.bones );
					if ( clip ) outputAnimations.push( clip );

				}

				// parse implicit morph animations
				if ( geometry.morphTargets ) {

					// TODO: Figure out what an appropraite FPS is for morph target animations -- defaulting to 10, but really it is completely arbitrary.
					var morphAnimationClips = AnimationClip.CreateClipsFromMorphTargetSequences( geometry.morphTargets, 10 );
					outputAnimations = outputAnimations.concat( morphAnimationClips );

				}

				if ( outputAnimations.length > 0 ) geometry.animations = outputAnimations;

			}

			return function ( json, texturePath ) {

				if ( json.data !== undefined ) {

					// Geometry 4.0 spec
					json = json.data;

				}

				if ( json.scale !== undefined ) {

					json.scale = 1.0 / json.scale;

				} else {

					json.scale = 1.0;

				}

				var geometry = new Geometry();

				parseModel( json, geometry );
				parseSkin( json, geometry );
				parseMorphing( json, geometry );
				parseAnimations( json, geometry );

				geometry.computeFaceNormals();
				geometry.computeBoundingSphere();

				if ( json.materials === undefined || json.materials.length === 0 ) {

					return { geometry: geometry };

				} else {

					var materials = Loader.prototype.initMaterials( json.materials, texturePath, this.crossOrigin );

					return { geometry: geometry, materials: materials };

				}

			};

		} )()

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Line( geometry, material, mode ) {

		if ( mode === 1 ) {

			console.warn( 'THREE.Line: parameter THREE.LinePieces no longer supported. Created THREE.LineSegments instead.' );
			return new LineSegments( geometry, material );

		}

		Object3D.call( this );

		this.type = 'Line';

		this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
		this.material = material !== undefined ? material : new LineBasicMaterial( { color: Math.random() * 0xffffff } );

	}

	Line.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Line,

		isLine: true,

		raycast: ( function () {

			var inverseMatrix = new Matrix4();
			var ray = new Ray();
			var sphere = new Sphere();

			return function raycast( raycaster, intersects ) {

				var precision = raycaster.linePrecision;
				var precisionSq = precision * precision;

				var geometry = this.geometry;
				var matrixWorld = this.matrixWorld;

				// Checking boundingSphere distance to ray

				if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();

				sphere.copy( geometry.boundingSphere );
				sphere.applyMatrix4( matrixWorld );

				if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;

				//

				inverseMatrix.getInverse( matrixWorld );
				ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );

				var vStart = new Vector3();
				var vEnd = new Vector3();
				var interSegment = new Vector3();
				var interRay = new Vector3();
				var step = ( this && this.isLineSegments ) ? 2 : 1;

				if ( geometry.isBufferGeometry ) {

					var index = geometry.index;
					var attributes = geometry.attributes;
					var positions = attributes.position.array;

					if ( index !== null ) {

						var indices = index.array;

						for ( var i = 0, l = indices.length - 1; i < l; i += step ) {

							var a = indices[ i ];
							var b = indices[ i + 1 ];

							vStart.fromArray( positions, a * 3 );
							vEnd.fromArray( positions, b * 3 );

							var distSq = ray.distanceSqToSegment( vStart, vEnd, interRay, interSegment );

							if ( distSq > precisionSq ) continue;

							interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

							var distance = raycaster.ray.origin.distanceTo( interRay );

							if ( distance < raycaster.near || distance > raycaster.far ) continue;

							intersects.push( {

								distance: distance,
								// What do we want? intersection point on the ray or on the segment??
								// point: raycaster.ray.at( distance ),
								point: interSegment.clone().applyMatrix4( this.matrixWorld ),
								index: i,
								face: null,
								faceIndex: null,
								object: this

							} );

						}

					} else {

						for ( var i = 0, l = positions.length / 3 - 1; i < l; i += step ) {

							vStart.fromArray( positions, 3 * i );
							vEnd.fromArray( positions, 3 * i + 3 );

							var distSq = ray.distanceSqToSegment( vStart, vEnd, interRay, interSegment );

							if ( distSq > precisionSq ) continue;

							interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

							var distance = raycaster.ray.origin.distanceTo( interRay );

							if ( distance < raycaster.near || distance > raycaster.far ) continue;

							intersects.push( {

								distance: distance,
								// What do we want? intersection point on the ray or on the segment??
								// point: raycaster.ray.at( distance ),
								point: interSegment.clone().applyMatrix4( this.matrixWorld ),
								index: i,
								face: null,
								faceIndex: null,
								object: this

							} );

						}

					}

				} else if ( geometry.isGeometry ) {

					var vertices = geometry.vertices;
					var nbVertices = vertices.length;

					for ( var i = 0; i < nbVertices - 1; i += step ) {

						var distSq = ray.distanceSqToSegment( vertices[ i ], vertices[ i + 1 ], interRay, interSegment );

						if ( distSq > precisionSq ) continue;

						interRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation

						var distance = raycaster.ray.origin.distanceTo( interRay );

						if ( distance < raycaster.near || distance > raycaster.far ) continue;

						intersects.push( {

							distance: distance,
							// What do we want? intersection point on the ray or on the segment??
							// point: raycaster.ray.at( distance ),
							point: interSegment.clone().applyMatrix4( this.matrixWorld ),
							index: i,
							face: null,
							faceIndex: null,
							object: this

						} );

					}

				}

			};

		}() ),

		clone: function () {

			return new this.constructor( this.geometry, this.material ).copy( this );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function LineSegments( geometry, material ) {

		Line.call( this, geometry, material );

		this.type = 'LineSegments';

	}

	LineSegments.prototype = Object.assign( Object.create( Line.prototype ), {

		constructor: LineSegments,

		isLineSegments: true

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 */

	const x = 2;
	const y = 3;
	const z = 4;
	const w = 5;

	const negInf2 = new Vector2( - Infinity, - Infinity );
	const posInf2 = new Vector2( Infinity, Infinity );

	const zero2 = new Vector2();
	const one2 = new Vector2( 1, 1 );
	const two2 = new Vector2( 2, 2 );

	const negInf3 = new Vector3( - Infinity, - Infinity, - Infinity );
	const posInf3 = new Vector3( Infinity, Infinity, Infinity );

	const zero3 = new Vector3();
	const one3 = new Vector3( 1, 1, 1 );
	const two3 = new Vector3( 2, 2, 2 );

	const eps = 0.0001;

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	var DegToRad = Math.PI / 180;

	function bufferAttributeEquals( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;

		if ( a.count !== b.count || a.itemSize !== b.itemSize ) {

			return false;

		}

		for ( var i = 0, il = a.count * a.itemSize; i < il; i ++ ) {

			var delta = a[ i ] - b[ i ];
			if ( delta > tolerance ) {

				return false;

			}

		}

		return true;

	}

	function getBBForVertices( vertices ) {

		var geometry = new BufferGeometry();

		geometry.addAttribute( "position", new BufferAttribute( new Float32Array( vertices ), 3 ) );
		geometry.computeBoundingBox();

		return geometry.boundingBox;

	}

	function getBSForVertices( vertices ) {

		var geometry = new BufferGeometry();

		geometry.addAttribute( "position", new BufferAttribute( new Float32Array( vertices ), 3 ) );
		geometry.computeBoundingSphere();

		return geometry.boundingSphere;

	}

	function getNormalsForVertices( vertices, assert ) {

		var geometry = new BufferGeometry();

		geometry.addAttribute( "position", new BufferAttribute( new Float32Array( vertices ), 3 ) );

		geometry.computeVertexNormals();

		assert.ok( geometry.attributes.normal !== undefined, "normal attribute was created" );

		return geometry.attributes.normal.array;

	}

	function comparePositions( pos, v ) {

		return (
			pos[ 0 ] === v[ 0 ].x && pos[ 1 ] === v[ 0 ].y && pos[ 2 ] === v[ 0 ].z &&
			pos[ 3 ] === v[ 1 ].x && pos[ 4 ] === v[ 1 ].y && pos[ 5 ] === v[ 1 ].z &&
			pos[ 6 ] === v[ 2 ].x && pos[ 7 ] === v[ 2 ].y && pos[ 8 ] === v[ 2 ].z
		);

	}

	function compareColors( col, c ) {

		return (
			col[ 0 ] === c[ 0 ].r && col[ 1 ] === c[ 0 ].g && col[ 2 ] === c[ 0 ].b &&
			col[ 3 ] === c[ 1 ].r && col[ 4 ] === c[ 1 ].g && col[ 5 ] === c[ 1 ].b &&
			col[ 6 ] === c[ 2 ].r && col[ 7 ] === c[ 2 ].g && col[ 8 ] === c[ 2 ].b
		);

	}

	function compareUvs( uvs, u ) {

		return (
			uvs[ 0 ] === u[ 0 ].x && uvs[ 1 ] === u[ 0 ].y &&
			uvs[ 2 ] === u[ 1 ].x && uvs[ 3 ] === u[ 1 ].y &&
			uvs[ 4 ] === u[ 2 ].x && uvs[ 5 ] === u[ 2 ].y
		);

	}

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'BufferGeometry', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isBufferGeometry", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setIndex/getIndex", ( assert ) => {

				var a = new BufferGeometry();
				var uint16 = [ 1, 2, 3 ];
				var uint32 = [ 65535, 65536, 65537 ];
				var str = "foo";

				a.setIndex( uint16 );
				assert.ok( a.getIndex() instanceof Uint16BufferAttribute, "Index has the right type" );
				assert.deepEqual( a.getIndex().array, new Uint16Array( uint16 ), "Small index gets stored correctly" );

				a.setIndex( uint32 );
				assert.ok( a.getIndex() instanceof Uint32BufferAttribute, "Index has the right type" );
				assert.deepEqual( a.getIndex().array, new Uint32Array( uint32 ), "Large index gets stored correctly" );

				a.setIndex( str );
				assert.strictEqual( a.getIndex(), str, "Weird index gets stored correctly" );

			} );

			QUnit.test( "getAttribute", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "add / delete Attribute", ( assert ) => {

				var geometry = new BufferGeometry();
				var attributeName = "position";

				assert.ok( geometry.attributes[ attributeName ] === undefined, 'no attribute defined' );

				geometry.addAttribute( attributeName, new BufferAttribute( new Float32Array( [ 1, 2, 3 ], 1 ) ) );

				assert.ok( geometry.attributes[ attributeName ] !== undefined, 'attribute is defined' );

				geometry.removeAttribute( attributeName );

				assert.ok( geometry.attributes[ attributeName ] === undefined, 'no attribute defined' );

			} );

			QUnit.test( "addGroup", ( assert ) => {

				var a = new BufferGeometry();
				var expected = [
					{
						start: 0,
						count: 1,
						materialIndex: 0
					},
					{
						start: 1,
						count: 2,
						materialIndex: 2
					}
				];

				a.addGroup( 0, 1, 0 );
				a.addGroup( 1, 2, 2 );

				assert.deepEqual( a.groups, expected, "Check groups were stored correctly and in order" );

				a.clearGroups();
				assert.strictEqual( a.groups.length, 0, "Check groups were deleted correctly" );

			} );
			QUnit.test( "clearGroups", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setDrawRange", ( assert ) => {

				var a = new BufferGeometry();

				a.setDrawRange( 1.0, 7 );

				assert.deepEqual( a.drawRange, {
					start: 1,
					count: 7
				}, "Check draw range was stored correctly" );

			} );

			QUnit.test( "applyMatrix", ( assert ) => {

				var geometry = new BufferGeometry();
				geometry.addAttribute( "position", new BufferAttribute( new Float32Array( 6 ), 3 ) );

				var matrix = new Matrix4().set(
					1, 0, 0, 1.5,
					0, 1, 0, - 2,
					0, 0, 1, 3,
					0, 0, 0, 1
				);
				geometry.applyMatrix( matrix );

				var position = geometry.attributes.position.array;
				var m = matrix.elements;
				assert.ok( position[ 0 ] === m[ 12 ] && position[ 1 ] === m[ 13 ] && position[ 2 ] === m[ 14 ], "position was extracted from matrix" );
				assert.ok( position[ 3 ] === m[ 12 ] && position[ 4 ] === m[ 13 ] && position[ 5 ] === m[ 14 ], "position was extracted from matrix twice" );
				assert.ok( geometry.attributes.position.version === 1, "version was increased during update" );

			} );

			QUnit.test( "rotateX/Y/Z", ( assert ) => {

				var geometry = new BufferGeometry();
				geometry.addAttribute( "position", new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 ) );

				var pos = geometry.attributes.position.array;

				geometry.rotateX( 180 * DegToRad );

				// object was rotated around x so all items should be flipped but the x ones
				assert.ok( pos[ 0 ] === 1 && pos[ 1 ] === - 2 && pos[ 2 ] === - 3 &&
					pos[ 3 ] === 4 && pos[ 4 ] === - 5 && pos[ 5 ] === - 6, "vertices were rotated around x by 180 degrees" );

				geometry.rotateY( 180 * DegToRad );

				// vertices were rotated around y so all items should be flipped again but the y ones
				assert.ok( pos[ 0 ] === - 1 && pos[ 1 ] === - 2 && pos[ 2 ] === 3 &&
					pos[ 3 ] === - 4 && pos[ 4 ] === - 5 && pos[ 5 ] === 6, "vertices were rotated around y by 180 degrees" );

				geometry.rotateZ( 180 * DegToRad );

				// vertices were rotated around z so all items should be flipped again but the z ones
				assert.ok( pos[ 0 ] === 1 && pos[ 1 ] === 2 && pos[ 2 ] === 3 &&
					pos[ 3 ] === 4 && pos[ 4 ] === 5 && pos[ 5 ] === 6, "vertices were rotated around z by 180 degrees" );

			} );

			QUnit.test( "translate", ( assert ) => {

				var geometry = new BufferGeometry();
				geometry.addAttribute( "position", new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 ) );

				var pos = geometry.attributes.position.array;

				geometry.translate( 10, 20, 30 );

				assert.ok( pos[ 0 ] === 11 && pos[ 1 ] === 22 && pos[ 2 ] === 33 &&
					pos[ 3 ] === 14 && pos[ 4 ] === 25 && pos[ 5 ] === 36, "vertices were translated" );

			} );

			QUnit.test( "scale", ( assert ) => {

				var geometry = new BufferGeometry();
				geometry.addAttribute( "position", new BufferAttribute( new Float32Array( [ - 1, - 1, - 1, 2, 2, 2 ] ), 3 ) );

				var pos = geometry.attributes.position.array;

				geometry.scale( 1, 2, 3 );

				assert.ok( pos[ 0 ] === - 1 && pos[ 1 ] === - 2 && pos[ 2 ] === - 3 &&
					pos[ 3 ] === 2 && pos[ 4 ] === 4 && pos[ 5 ] === 6, "vertices were scaled" );

			} );

			QUnit.test( "lookAt", ( assert ) => {

				var a = new BufferGeometry();
				var vertices = new Float32Array( [
					- 1.0, - 1.0, 1.0,
					1.0, - 1.0, 1.0,
					1.0, 1.0, 1.0,

					1.0, 1.0, 1.0,
					- 1.0, 1.0, 1.0,
					- 1.0, - 1.0, 1.0
				] );
				a.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );

				var sqrt = Math.sqrt( 2 );
				var expected = new Float32Array( [
					1, 0, - sqrt,
					- 1, 0, - sqrt,
					- 1, sqrt, 0,

					- 1, sqrt, 0,
					1, sqrt, 0,
					1, 0, - sqrt
				] );

				a.lookAt( new Vector3( 0, 1, - 1 ) );

				assert.ok( bufferAttributeEquals( a.attributes.position.array, expected ), "Rotation is correct" );

			} );

			QUnit.test( "center", ( assert ) => {

				var geometry = new BufferGeometry();
				geometry.addAttribute( "position", new BufferAttribute( new Float32Array( [
					- 1, - 1, - 1,
					1, 1, 1,
					4, 4, 4
				] ), 3 ) );

				geometry.center();

				var pos = geometry.attributes.position.array;

				// the boundingBox should go from (-1, -1, -1) to (4, 4, 4) so it has a size of (5, 5, 5)
				// after centering it the vertices should be placed between (-2.5, -2.5, -2.5) and (2.5, 2.5, 2.5)
				assert.ok( pos[ 0 ] === - 2.5 && pos[ 1 ] === - 2.5 && pos[ 2 ] === - 2.5 &&
					pos[ 3 ] === - 0.5 && pos[ 4 ] === - 0.5 && pos[ 5 ] === - 0.5 &&
					pos[ 6 ] === 2.5 && pos[ 7 ] === 2.5 && pos[ 8 ] === 2.5, "vertices were replaced by boundingBox dimensions" );

			} );

			QUnit.test( "setFromObject", ( assert ) => {

				var lineGeo = new Geometry();
				lineGeo.vertices.push(
					new Vector3( - 10, 0, 0 ),
					new Vector3( 0, 10, 0 ),
					new Vector3( 10, 0, 0 )
				);

				lineGeo.colors.push(
					new Color( 1, 0, 0 ),
					new Color( 0, 1, 0 ),
					new Color( 0, 0, 1 )
				);

				var line = new LineSegments( lineGeo, null );
				var geometry = new BufferGeometry().setFromObject( line );

				var pos = geometry.attributes.position.array;
				var col = geometry.attributes.color.array;
				var v = lineGeo.vertices;
				var c = lineGeo.colors;

				assert.ok(
					// position exists
					pos !== undefined &&

					// vertex arrays have the same size
					v.length * 3 === pos.length &&

					// there are three complete vertices (each vertex contains three values)
					geometry.attributes.position.count === 3 &&

					// check if both arrays contains the same data
					pos[ 0 ] === v[ 0 ].x && pos[ 1 ] === v[ 0 ].y && pos[ 2 ] === v[ 0 ].z &&
					pos[ 3 ] === v[ 1 ].x && pos[ 4 ] === v[ 1 ].y && pos[ 5 ] === v[ 1 ].z &&
					pos[ 6 ] === v[ 2 ].x && pos[ 7 ] === v[ 2 ].y && pos[ 8 ] === v[ 2 ].z
					, "positions are equal" );

				assert.ok(
					// color exists
					col !== undefined &&

					// color arrays have the same size
					c.length * 3 === col.length &&

					// there are three complete colors (each color contains three values)
					geometry.attributes.color.count === 3 &&

					// check if both arrays contains the same data
					col[ 0 ] === c[ 0 ].r && col[ 1 ] === c[ 0 ].g && col[ 2 ] === c[ 0 ].b &&
					col[ 3 ] === c[ 1 ].r && col[ 4 ] === c[ 1 ].g && col[ 5 ] === c[ 1 ].b &&
					col[ 6 ] === c[ 2 ].r && col[ 7 ] === c[ 2 ].g && col[ 8 ] === c[ 2 ].b
					, "colors are equal" );

			} );
			QUnit.test( "setFromObject (more)", ( assert ) => {

				var lineGeo = new Geometry();
				lineGeo.vertices.push(
					new Vector3( - 10, 0, 0 ),
					new Vector3( 0, 10, 0 ),
					new Vector3( 10, 0, 0 )
				);

				lineGeo.colors.push(
					new Color( 1, 0, 0 ),
					new Color( 0, 1, 0 ),
					new Color( 0, 0, 1 )
				);

				lineGeo.computeBoundingBox();
				lineGeo.computeBoundingSphere();

				var line = new LineSegments( lineGeo );
				var geometry = new BufferGeometry().setFromObject( line );

				assert.ok( geometry.boundingBox.equals( lineGeo.boundingBox ), "BoundingBox was set correctly" );
				assert.ok( geometry.boundingSphere.equals( lineGeo.boundingSphere ), "BoundingSphere was set correctly" );

				var pos = geometry.attributes.position.array;
				var col = geometry.attributes.color.array;
				var v = lineGeo.vertices;
				var c = lineGeo.colors;

				// adapted from setFromObject QUnit.test (way up)
				assert.notStrictEqual( pos, undefined, "Position attribute exists" );
				assert.strictEqual( v.length * 3, pos.length, "Vertex arrays have the same size" );
				assert.strictEqual( geometry.attributes.position.count, 3, "Correct number of vertices" );
				assert.ok( comparePositions( pos, v ), "Positions are identical" );

				assert.notStrictEqual( col, undefined, "Color attribute exists" );
				assert.strictEqual( c.length * 3, col.length, "Color arrays have the same size" );
				assert.strictEqual( geometry.attributes.color.count, 3, "Correct number of colors" );
				assert.ok( compareColors( col, c ), "Colors are identical" );

				// setFromObject with a Mesh as object
				lineGeo.faces.push( new Face3( 0, 1, 2 ) );
				var lineMesh = new Mesh( lineGeo );
				var geometry = new BufferGeometry().setFromObject( lineMesh );

				// no colors
				var pos = geometry.attributes.position.array;
				var v = lineGeo.vertices;

				assert.notStrictEqual( pos, undefined, "Mesh: position attribute exists" );
				assert.strictEqual( v.length * 3, pos.length, "Mesh: vertex arrays have the same size" );
				assert.strictEqual( geometry.attributes.position.count, 3, "Mesh: correct number of vertices" );
				assert.ok( comparePositions( pos, v ), "Mesh: positions are identical" );

			} );

			QUnit.test( "updateFromObject", ( assert ) => {

				var geo = new Geometry();

				geo.vertices.push(
					new Vector3( - 10, 0, 0 ),
					new Vector3( 0, 10, 0 ),
					new Vector3( 10, 0, 0 )
				);

				geo.faces.push( new Face3( 0, 1, 2 ) );

				geo.faces[ 0 ].vertexColors.push(
					new Color( 1, 0, 0 ),
					new Color( 0, 1, 0 ),
					new Color( 0, 0, 1 )
				);

				geo.faceVertexUvs[ 0 ] = [
					[
						new Vector2( 0, 0 ),
						new Vector2( 1, 0 ),
						new Vector2( 1, 1 )
					]
				];

				geo.computeFaceNormals();
				geo.computeVertexNormals();

				geo.verticesNeedUpdate = true;
				geo.normalsNeedUpdate = true;
				geo.colorsNeedUpdate = true;
				geo.uvsNeedUpdate = true;
				geo.groupsNeedUpdate = true;

				var mesh = new Mesh( geo );
				var geometry = new BufferGeometry();

				geometry.updateFromObject( mesh ); // first call to create the underlying structure (DirectGeometry)
				geometry.updateFromObject( mesh ); // second time to actually go thru the motions and update

				var pos = geometry.attributes.position.array;
				var col = geometry.attributes.color.array;
				var norm = geometry.attributes.normal.array;
				var uvs = geometry.attributes.uv.array;
				var v = geo.vertices;
				var c = geo.faces[ 0 ].vertexColors;
				var n = geo.faces[ 0 ].vertexNormals;
				var u = geo.faceVertexUvs[ 0 ][ 0 ];

				assert.notStrictEqual( pos, undefined, "Position attribute exists" );
				assert.strictEqual( v.length * 3, pos.length, "Both arrays have the same size" );
				assert.strictEqual( geometry.attributes.position.count, v.length, "Correct number of vertices" );
				assert.ok( comparePositions( pos, v ), "Positions are identical" );

				assert.notStrictEqual( col, undefined, "Color attribute exists" );
				assert.strictEqual( c.length * 3, col.length, "Both arrays have the same size" );
				assert.strictEqual( geometry.attributes.color.count, c.length, "Correct number of colors" );
				assert.ok( compareColors( col, c ), "Colors are identical" );

				assert.notStrictEqual( norm, undefined, "Normal attribute exists" );
				assert.strictEqual( n.length * 3, norm.length, "Both arrays have the same size" );
				assert.strictEqual( geometry.attributes.normal.count, n.length, "Correct number of normals" );
				assert.ok( comparePositions( norm, n ), "Normals are identical" );

				assert.notStrictEqual( uvs, undefined, "UV attribute exists" );
				assert.strictEqual( u.length * 2, uvs.length, "Both arrays have the same size" );
				assert.strictEqual( geometry.attributes.uv.count, u.length, "Correct number of UV coordinates" );
				assert.ok( compareUvs( uvs, u ), "UVs are identical" );

			} );

			QUnit.test( "fromGeometry/fromDirectGeometry", ( assert ) => {

				var a = new BufferGeometry();
				// BoxGeometry is a bit too simple but works fine in a pinch
				// var b = new BoxGeometry( 1, 1, 1 );
				// b.mergeVertices();
				// b.computeVertexNormals();
				// b.computeBoundingBox();
				// b.computeBoundingSphere();
				var asyncDone = assert.async(); // tell QUnit we're done with asserts

				var loader = new JSONLoader();
				loader.load( "../../examples/models/skinned/simple/simple.js", function ( modelGeometry ) {

					a.fromGeometry( modelGeometry );

					var attr;
					var geometry = new DirectGeometry().fromGeometry( modelGeometry );

					var positions = new Float32Array( geometry.vertices.length * 3 );
					attr = new BufferAttribute( positions, 3 ).copyVector3sArray( geometry.vertices );
					assert.ok( bufferAttributeEquals( a.attributes.position, attr ), "Vertices are identical" );

					if ( geometry.normals.length > 0 ) {

						var normals = new Float32Array( geometry.normals.length * 3 );
						attr = new BufferAttribute( normals, 3 ).copyVector3sArray( geometry.normals );
						assert.ok( bufferAttributeEquals( a.attributes.normal, attr ), "Normals are identical" );

					}

					if ( geometry.colors.length > 0 ) {

						var colors = new Float32Array( geometry.colors.length * 3 );
						attr = new BufferAttribute( colors, 3 ).copyColorsArray( geometry.colors );
						assert.ok( bufferAttributeEquals( a.attributes.color, attr ), "Colors are identical" );

					}

					if ( geometry.uvs.length > 0 ) {

						var uvs = new Float32Array( geometry.uvs.length * 2 );
						attr = new BufferAttribute( uvs, 2 ).copyVector2sArray( geometry.uvs );
						assert.ok( bufferAttributeEquals( a.attributes.uv, attr ), "UVs are identical" );

					}

					if ( geometry.uvs2.length > 0 ) {

						var uvs2 = new Float32Array( geometry.uvs2.length * 2 );
						attr = new BufferAttribute( uvs2, 2 ).copyVector2sArray( geometry.uvs2 );
						assert.ok( bufferAttributeEquals( a.attributes.uv2, attr ), "UV2s are identical" );

					}

					if ( geometry.indices.length > 0 ) {

						var TypeArray = arrayMax( geometry.indices ) > 65535 ? Uint32Array : Uint16Array;
						var indices = new TypeArray( geometry.indices.length * 3 );
						attr = new BufferAttribute( indices, 1 ).copyIndicesArray( geometry.indices );
						assert.ok( bufferAttributeEquals( a.indices, attr ), "Indices are identical" );

					}

					// groups
					assert.deepEqual( a.groups, geometry.groups, "Groups are identical" );

					// morphs
					if ( geometry.morphTargets !== undefined ) {

						for ( var name in geometry.morphTargets ) {

							var morphTargets = geometry.morphTargets[ name ];

							for ( var i = 0, l = morphTargets.length; i < l; i ++ ) {

								var morphTarget = morphTargets[ i ];

								attr = new Float32BufferAttribute( morphTarget.length * 3, 3 );
								attr.copyVector3sArray( morphTarget );

								assert.ok(
									bufferAttributeEquals( a.morphAttributes[ name ][ i ], attr ),
									"MorphTargets #" + i + " are identical"
								);

							}

						}

					}

					// skinning
					if ( geometry.skinIndices.length > 0 ) {

						attr = new Float32BufferAttribute( geometry.skinIndices.length * 4, 4 );
						attr.copyVector4sArray( geometry.skinIndices );
						assert.ok( bufferAttributeEquals( a.attributes.skinIndex, attr ), "SkinIndices are identical" );

					}

					if ( geometry.skinWeights.length > 0 ) {

						attr = new Float32BufferAttribute( geometry.skinWeights.length * 4, 4 );
						attr.copyVector4sArray( geometry.skinWeights );
						assert.ok( bufferAttributeEquals( a.attributes.skinWeight, attr ), "SkinWeights are identical" );

					}

					// TODO
					// DirectGeometry doesn't actually copy boundingSphere and boundingBox yet,
					// so they're always null
					if ( geometry.boundingSphere !== null ) {

						assert.ok( a.boundingSphere.equals( geometry.boundingSphere ), "BoundingSphere is identical" );

					}

					if ( geometry.boundingBox !== null ) {

						assert.ok( a.boundingBox.equals( geometry.boundingBox ), "BoundingBox is identical" );

					}

					asyncDone();

				} );

			} );

			QUnit.test( "computeBoundingBox", ( assert ) => {

				var bb = getBBForVertices( [ - 1, - 2, - 3, 13, - 2, - 3.5, - 1, - 20, 0, - 4, 5, 6 ] );

				assert.ok( bb.min.x === - 4 && bb.min.y === - 20 && bb.min.z === - 3.5, "min values are set correctly" );
				assert.ok( bb.max.x === 13 && bb.max.y === 5 && bb.max.z === 6, "max values are set correctly" );

				var bb = getBBForVertices( [ - 1, - 1, - 1 ] );

				assert.ok( bb.min.x === bb.max.x && bb.min.y === bb.max.y && bb.min.z === bb.max.z, "since there is only one vertex, max and min are equal" );
				assert.ok( bb.min.x === - 1 && bb.min.y === - 1 && bb.min.z === - 1, "since there is only one vertex, min and max are this vertex" );

			} );

			QUnit.test( "computeBoundingSphere", ( assert ) => {

				var bs = getBSForVertices( [ - 10, 0, 0, 10, 0, 0 ] );

				assert.ok( bs.radius === ( 10 + 10 ) / 2, "radius is equal to deltaMinMax / 2" );
				assert.ok( bs.center.x === 0 && bs.center.y === 0 && bs.center.y === 0, "bounding sphere is at ( 0, 0, 0 )" );

				var bs = getBSForVertices( [ - 5, 11, - 3, 5, - 11, 3 ] );
				var radius = new Vector3( 5, 11, 3 ).length();

				assert.ok( bs.radius === radius, "radius is equal to directionLength" );
				assert.ok( bs.center.x === 0 && bs.center.y === 0 && bs.center.y === 0, "bounding sphere is at ( 0, 0, 0 )" );

			} );

			QUnit.test( "computeFaceNormals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "computeVertexNormals", ( assert ) => {

				// get normals for a counter clockwise created triangle
				var normals = getNormalsForVertices( [ - 1, 0, 0, 1, 0, 0, 0, 1, 0 ], assert );

				assert.ok( normals[ 0 ] === 0 && normals[ 1 ] === 0 && normals[ 2 ] === 1,
					"first normal is pointing to screen since the the triangle was created counter clockwise" );

				assert.ok( normals[ 3 ] === 0 && normals[ 4 ] === 0 && normals[ 5 ] === 1,
					"second normal is pointing to screen since the the triangle was created counter clockwise" );

				assert.ok( normals[ 6 ] === 0 && normals[ 7 ] === 0 && normals[ 8 ] === 1,
					"third normal is pointing to screen since the the triangle was created counter clockwise" );

				// get normals for a clockwise created triangle
				var normals = getNormalsForVertices( [ 1, 0, 0, - 1, 0, 0, 0, 1, 0 ], assert );

				assert.ok( normals[ 0 ] === 0 && normals[ 1 ] === 0 && normals[ 2 ] === - 1,
					"first normal is pointing to screen since the the triangle was created clockwise" );

				assert.ok( normals[ 3 ] === 0 && normals[ 4 ] === 0 && normals[ 5 ] === - 1,
					"second normal is pointing to screen since the the triangle was created clockwise" );

				assert.ok( normals[ 6 ] === 0 && normals[ 7 ] === 0 && normals[ 8 ] === - 1,
					"third normal is pointing to screen since the the triangle was created clockwise" );

				var normals = getNormalsForVertices( [ 0, 0, 1, 0, 0, - 1, 1, 1, 0 ], assert );

				// the triangle is rotated by 45 degrees to the right so the normals of the three vertices
				// should point to (1, -1, 0).normalized(). The simplest solution is to check against a normalized
				// vector (1, -1, 0) but you will get calculation errors because of floating calculations so another
				// valid technique is to create a vector which stands in 90 degrees to the normals and calculate the
				// dot product which is the cos of the angle between them. This should be < floating calculation error
				// which can be taken from Number.EPSILON
				var direction = new Vector3( 1, 1, 0 ).normalize(); // a vector which should have 90 degrees difference to normals
				var difference = direction.dot( new Vector3( normals[ 0 ], normals[ 1 ], normals[ 2 ] ) );
				assert.ok( difference < Number.EPSILON, "normal is equal to reference vector" );

				// get normals for a line should be NAN because you need min a triangle to calculate normals
				var normals = getNormalsForVertices( [ 1, 0, 0, - 1, 0, 0 ], assert );
				for ( var i = 0; i < normals.length; i ++ ) {

					assert.ok( ! normals[ i ], "normals can't be calculated which is good" );

				}

			} );
			QUnit.test( "computeVertexNormals (indexed)", ( assert ) => {

				var sqrt = 0.5 * Math.sqrt( 2 );
				var normal = new BufferAttribute( new Float32Array( [
					- 1, 0, 0, - 1, 0, 0, - 1, 0, 0,
					sqrt, sqrt, 0, sqrt, sqrt, 0, sqrt, sqrt, 0,
					- 1, 0, 0
				] ), 3 );
				var position = new BufferAttribute( new Float32Array( [
					0.5, 0.5, 0.5, 0.5, 0.5, - 0.5, 0.5, - 0.5, 0.5,
					0.5, - 0.5, - 0.5, - 0.5, 0.5, - 0.5, - 0.5, 0.5, 0.5,
					- 0.5, - 0.5, - 0.5
				] ), 3 );
				var index = new BufferAttribute( new Uint16Array( [
					0, 2, 1, 2, 3, 1, 4, 6, 5, 6, 7, 5
				] ), 1 );

				var a = new BufferGeometry();
				a.addAttribute( "position", position );
				a.computeVertexNormals();
				assert.ok(
					bufferAttributeEquals( normal, a.getAttribute( "normal" ) ),
					"Regular geometry: first computed normals are correct"
				);

				// a second time to see if the existing normals get properly deleted
				a.computeVertexNormals();
				assert.ok(
					bufferAttributeEquals( normal, a.getAttribute( "normal" ) ),
					"Regular geometry: second computed normals are correct"
				);

				// indexed geometry
				var a = new BufferGeometry();
				a.addAttribute( "position", position );
				a.setIndex( index );
				a.computeVertexNormals();
				assert.ok( bufferAttributeEquals( normal, a.getAttribute( "normal" ) ), "Indexed geometry: computed normals are correct" );

			} );

			QUnit.test( "merge", ( assert ) => {

				var geometry1 = new BufferGeometry();
				geometry1.addAttribute( "attrName", new BufferAttribute( new Float32Array( [ 1, 2, 3, 0, 0, 0 ] ), 3 ) );

				var geometry2 = new BufferGeometry();
				geometry2.addAttribute( "attrName", new BufferAttribute( new Float32Array( [ 4, 5, 6 ] ), 3 ) );

				var attr = geometry1.attributes.attrName.array;

				geometry1.merge( geometry2, 1 );

				// merged array should be 1, 2, 3, 4, 5, 6
				for ( var i = 0; i < attr.length; i ++ ) {

					assert.ok( attr[ i ] === i + 1, "" );

				}

				geometry1.merge( geometry2 );
				assert.ok( attr[ 0 ] === 4 && attr[ 1 ] === 5 && attr[ 2 ] === 6, "copied the 3 attributes without offset" );

			} );

			QUnit.test( "normalizeNormals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toNonIndexed", ( assert ) => {

				var geometry = new BufferGeometry();
				var vertices = new Float32Array( [
					0.5, 0.5, 0.5, 0.5, 0.5, - 0.5, 0.5, - 0.5, 0.5, 0.5, - 0.5, - 0.5
				] );
				var index = new BufferAttribute( new Uint16Array( [ 0, 2, 1, 2, 3, 1 ] ) );
				var expected = new Float32Array( [
					0.5, 0.5, 0.5, 0.5, - 0.5, 0.5, 0.5, 0.5, - 0.5,
					0.5, - 0.5, 0.5, 0.5, - 0.5, - 0.5, 0.5, 0.5, - 0.5
				] );

				geometry.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );
				geometry.setIndex( index );

				var nonIndexed = geometry.toNonIndexed();

				assert.deepEqual( nonIndexed.getAttribute( "position" ).array, expected, "Expected vertices" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				var index = new BufferAttribute( new Uint16Array( [ 0, 1, 2, 3 ] ), 1 );
				var attribute1 = new BufferAttribute( new Uint16Array( [ 1, 3, 5, 7 ] ), 1 );
				var a = new BufferGeometry();
				a.name = "JSONQUnit.test";
				// a.parameters = { "placeholder": 0 };
				a.addAttribute( "attribute1", attribute1 );
				a.setIndex( index );
				a.addGroup( 0, 1, 2 );
				a.boundingSphere = new Sphere( new Vector3( x, y, z ), 0.5 );
				var j = a.toJSON();

				var gold = {
					"metadata": {
						"version": 4.5,
						"type": "BufferGeometry",
						"generator": "BufferGeometry.toJSON"
					},
					"uuid": a.uuid,
					"type": "BufferGeometry",
					"name": "JSONQUnit.test",
					"data": {
						"attributes": {
							"attribute1": {
								"itemSize": 1,
								"type": "Uint16Array",
								"array": [ 1, 3, 5, 7 ],
								"normalized": false
							}
						},
						"index": {
							"type": "Uint16Array",
							"array": [ 0, 1, 2, 3 ]
						},
						"groups": [
							{
								"start": 0,
								"count": 1,
								"materialIndex": 2
							}
						],
						"boundingSphere": {
							"center": [ 2, 3, 4 ],
							"radius": 0.5
						}
					}
				};

				assert.deepEqual( j, gold, "Generated JSON is as expected" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var a = new BufferGeometry();
				a.addAttribute( "attribute1", new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 ) );
				a.addAttribute( "attribute2", new BufferAttribute( new Float32Array( [ 0, 1, 3, 5, 6 ] ), 1 ) );
				a.addGroup( 0, 1, 2 );
				a.computeBoundingBox();
				a.computeBoundingSphere();
				a.setDrawRange( 0, 1 );
				var b = a.clone();

				assert.notEqual( a, b, "A new object was created" );
				assert.notEqual( a.id, b.id, "New object has a different GUID" );

				assert.strictEqual(
					Object.keys( a.attributes ).count, Object.keys( b.attributes ).count,
					"Both objects have the same amount of attributes"
				);
				assert.ok(
					bufferAttributeEquals( a.getAttribute( "attribute1" ), b.getAttribute( "attribute1" ) ),
					"First attributes buffer is identical"
				);
				assert.ok(
					bufferAttributeEquals( a.getAttribute( "attribute2" ), b.getAttribute( "attribute2" ) ),
					"Second attributes buffer is identical"
				);

				assert.deepEqual( a.groups, b.groups, "Groups are identical" );

				assert.ok( a.boundingBox.equals( b.boundingBox ), "BoundingBoxes are equal" );
				assert.ok( a.boundingSphere.equals( b.boundingSphere ), "BoundingSpheres are equal" );

				assert.strictEqual( a.drawRange.start, b.drawRange.start, "DrawRange start is identical" );
				assert.strictEqual( a.drawRange.count, b.drawRange.count, "DrawRange count is identical" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var geometry = new BufferGeometry();
				geometry.addAttribute( "attrName", new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 ) );
				geometry.addAttribute( "attrName2", new BufferAttribute( new Float32Array( [ 0, 1, 3, 5, 6 ] ), 1 ) );

				var copy = new BufferGeometry().copy( geometry );

				assert.ok( copy !== geometry && geometry.id !== copy.id, "new object was created" );

				Object.keys( geometry.attributes ).forEach( function ( key ) {

					var attribute = geometry.attributes[ key ];
					assert.ok( attribute !== undefined, "all attributes where copied" );

					for ( var i = 0; i < attribute.array.length; i ++ ) {

						assert.ok( attribute.array[ i ] === copy.attributes[ key ].array[ i ], "values of the attribute are equal" );

					}

				} );

			} );

			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Clock( autoStart ) {

		this.autoStart = ( autoStart !== undefined ) ? autoStart : true;

		this.startTime = 0;
		this.oldTime = 0;
		this.elapsedTime = 0;

		this.running = false;

	}

	Object.assign( Clock.prototype, {

		start: function () {

			this.startTime = ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732

			this.oldTime = this.startTime;
			this.elapsedTime = 0;
			this.running = true;

		},

		stop: function () {

			this.getElapsedTime();
			this.running = false;
			this.autoStart = false;

		},

		getElapsedTime: function () {

			this.getDelta();
			return this.elapsedTime;

		},

		getDelta: function () {

			var diff = 0;

			if ( this.autoStart && ! this.running ) {

				this.start();
				return 0;

			}

			if ( this.running ) {

				var newTime = ( typeof performance === 'undefined' ? Date : performance ).now();

				diff = ( newTime - this.oldTime ) / 1000;
				this.oldTime = newTime;

				this.elapsedTime += diff;

			}

			return diff;

		}

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Clock', () => {

			function mockPerformance() {

				self.performance = {
					deltaTime: 0,

					next: function ( delta ) {

						this.deltaTime += delta;

					},

					now: function () {

						return this.deltaTime;

					}

				};

			}

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "start", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "stop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getElapsedTime", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getDelta", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "clock with performance", ( assert ) => {

				mockPerformance();

				var clock = new Clock( false );

				clock.start();

				self.performance.next( 123 );
				assert.numEqual( clock.getElapsedTime(), 0.123, "okay" );

				self.performance.next( 100 );
				assert.numEqual( clock.getElapsedTime(), 0.223, "okay" );

				clock.stop();

				self.performance.next( 1000 );
				assert.numEqual( clock.getElapsedTime(), 0.223, "don't update time if the clock was stopped" );

			} );

		} );

	} );

	/**
	 * @author moraxy / https://github.com/moraxy
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'DirectGeometry', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "computeGroups", ( assert ) => {

				var a = new DirectGeometry();
				var b = new Geometry();
				var expected = [
					{ start: 0, materialIndex: 0, count: 3 },
					{ start: 3, materialIndex: 1, count: 3 },
					{ start: 6, materialIndex: 2, count: 6 }
				];

				// we only care for materialIndex
				b.faces.push(
					new Face3( 0, 0, 0, undefined, undefined, 0 ),
					new Face3( 0, 0, 0, undefined, undefined, 1 ),
					new Face3( 0, 0, 0, undefined, undefined, 2 ),
					new Face3( 0, 0, 0, undefined, undefined, 2 )
				);

				a.computeGroups( b );

				assert.deepEqual( a.groups, expected, "Groups are as expected" );

			} );

			QUnit.test( "fromGeometry", ( assert ) => {

				var a = new DirectGeometry();

				var asyncDone = assert.async(); // tell QUnit when we're done with async stuff

				var loader = new JSONLoader();
				loader.load( "../../examples/models/skinned/simple/simple.js", function ( geometry ) {

					a.fromGeometry( geometry );

					var tmp = new DirectGeometry();
					tmp.computeGroups( geometry );
					assert.deepEqual( a.groups, tmp.groups, "Check groups" );

					var morphTargets = geometry.morphTargets;
					var morphTargetsLength = morphTargets.length;

					var morphTargetsPosition;

					if ( morphTargetsLength > 0 ) {

						morphTargetsPosition = [];

						for ( var i = 0; i < morphTargetsLength; i ++ ) {

							morphTargetsPosition[ i ] = [];

						}

						morphTargets.position = morphTargetsPosition;

					}

					var morphNormals = geometry.morphNormals;
					var morphNormalsLength = morphNormals.length;

					var morphTargetsNormal;

					if ( morphNormalsLength > 0 ) {

						morphTargetsNormal = [];

						for ( var i = 0; i < morphNormalsLength; i ++ ) {

							morphTargetsNormal[ i ] = [];

						}

						morphTargets.normal = morphTargetsNormal;

					}

					var vertices = [];
					var normals = [];
					var colors = [];
					var uvs = [];
					var uvs2 = [];
					var skinIndices = [];
					var skinWeights = [];

					var hasFaceVertexUv = geometry.faceVertexUvs[ 0 ] && geometry.faceVertexUvs[ 0 ].length > 0;
					var hasFaceVertexUv2 = geometry.faceVertexUvs[ 1 ] && geometry.faceVertexUvs[ 1 ].length > 0;

					var hasSkinIndices = geometry.skinIndices.length === geometry.vertices.length;
					var hasSkinWeights = geometry.skinWeights.length === geometry.vertices.length;

					for ( var i = 0; i < geometry.faces.length; i ++ ) {

						var face = geometry.faces[ i ];

						vertices.push(
							geometry.vertices[ face.a ],
							geometry.vertices[ face.b ],
							geometry.vertices[ face.c ]
						);

						var vertexNormals = face.vertexNormals;

						if ( vertexNormals.length === 3 ) {

							normals.push( vertexNormals[ 0 ], vertexNormals[ 1 ], vertexNormals[ 2 ] );

						} else {

							normals.push( face.normal, face.normal, face.normal );

						}

						var vertexColors = face.vertexColors;

						if ( vertexColors.length === 3 ) {

							colors.push( vertexColors[ 0 ], vertexColors[ 1 ], vertexColors[ 2 ] );

						} else {

							colors.push( face.color, face.color, face.color );

						}

						if ( hasFaceVertexUv === true ) {

							var vertexUvs = geometry.faceVertexUvs[ 0 ][ i ];

							if ( vertexUvs !== undefined ) {

								uvs.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

							} else {

								uvs.push( new Vector2(), new Vector2(), new Vector2() );

							}

						}

						if ( hasFaceVertexUv2 === true ) {

							var vertexUvs = geometry.faceVertexUvs[ 1 ][ i ];

							if ( vertexUvs !== undefined ) {

								uvs2.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );

							} else {

								uvs2.push( new Vector2(), new Vector2(), new Vector2() );

							}

						}

						// morphs

						for ( var j = 0; j < morphTargetsLength; j ++ ) {

							var morphTarget = morphTargets[ j ].vertices;

							morphTargetsPosition[ j ].push(
								morphTarget[ face.a ],
								morphTarget[ face.b ],
								morphTarget[ face.c ]
							);

						}

						for ( var j = 0; j < morphNormalsLength; j ++ ) {

							var morphNormal = morphNormals[ j ].vertexNormals[ i ];

							morphTargetsNormal[ j ].push( morphNormal.a, morphNormal.b, morphNormal.c );

						}

						// skins

						if ( hasSkinIndices ) {

							skinIndices.push(
								geometry.skinIndices[ face.a ],
								geometry.skinIndices[ face.b ],
								geometry.skinIndices[ face.c ]
							);

						}

						if ( hasSkinWeights ) {

							skinWeights.push(
								geometry.skinWeights[ face.a ],
								geometry.skinWeights[ face.b ],
								geometry.skinWeights[ face.c ]
							);

						}

					}

					assert.deepEqual( a.vertices, vertices, "Vertices are identical" );
					assert.deepEqual( a.normals, normals, "Normals are identical" );
					assert.deepEqual( a.colors, colors, "Colors are identical" );
					assert.deepEqual( a.uvs, uvs, "UV coordinates are identical" );
					assert.deepEqual( a.uvs2, uvs2, "UV(2) coordinates are identical" );
					assert.deepEqual( a.skinIndices, skinIndices, "SkinIndices are identical" );
					assert.deepEqual( a.skinWeights, skinWeights, "SkinWeights are identical" );
					assert.deepEqual( a.morphTargetsPosition, morphTargetsPosition, "MorphTargets (Position) are identical" );
					assert.deepEqual( a.morphTargetsNormal, morphTargetsNormal, "MorphTargets (Normals) are identical" );

					asyncDone();

				} );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'EventDispatcher', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "addEventListener", ( assert ) => {

				var eventDispatcher = new EventDispatcher();

				var listener = {};
				eventDispatcher.addEventListener( 'anyType', listener );

				assert.ok( eventDispatcher._listeners.anyType.length === 1, "listener with unknown type was added" );
				assert.ok( eventDispatcher._listeners.anyType[ 0 ] === listener, "listener with unknown type was added" );

				eventDispatcher.addEventListener( 'anyType', listener );

				assert.ok( eventDispatcher._listeners.anyType.length === 1, "can't add one listener twice to same type" );
				assert.ok( eventDispatcher._listeners.anyType[ 0 ] === listener, "listener is still there" );

			} );

			QUnit.test( "hasEventListener", ( assert ) => {

				var eventDispatcher = new EventDispatcher();

				var listener = {};
				eventDispatcher.addEventListener( 'anyType', listener );

				assert.ok( eventDispatcher.hasEventListener( 'anyType', listener ), "listener was found" );
				assert.ok( ! eventDispatcher.hasEventListener( 'anotherType', listener ), "listener was not found which is good" );

			} );

			QUnit.test( "removeEventListener", ( assert ) => {

				var eventDispatcher = new EventDispatcher();

				var listener = {};

				assert.ok( eventDispatcher._listeners === undefined, "there are no listeners by default" );

				eventDispatcher.addEventListener( 'anyType', listener );
				assert.ok( Object.keys( eventDispatcher._listeners ).length === 1 &&
					eventDispatcher._listeners.anyType.length === 1, "if a listener was added, there is a new key" );

				eventDispatcher.removeEventListener( 'anyType', listener );
				assert.ok( eventDispatcher._listeners.anyType.length === 0, "listener was deleted" );

				eventDispatcher.removeEventListener( 'unknownType', listener );
				assert.ok( eventDispatcher._listeners.unknownType === undefined, "unknown types will be ignored" );

				eventDispatcher.removeEventListener( 'anyType', undefined );
				assert.ok( eventDispatcher._listeners.anyType.length === 0, "undefined listeners are ignored" );

			} );

			QUnit.test( "dispatchEvent", ( assert ) => {

				var eventDispatcher = new EventDispatcher();

				var callCount = 0;
				var listener = function () {

					callCount ++;

				};

				eventDispatcher.addEventListener( 'anyType', listener );
				assert.ok( callCount === 0, "no event, no call" );

				eventDispatcher.dispatchEvent( { type: 'anyType' } );
				assert.ok( callCount === 1, "one event, one call" );

				eventDispatcher.dispatchEvent( { type: 'anyType' } );
				assert.ok( callCount === 2, "two events, two calls" );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Face3', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "copy", ( assert ) => {

				var instance = new Face3( 0, 1, 2, new Vector3( 0, 1, 0 ), new Color( 0.25, 0.5, 0.75 ), 2 );
				var copiedInstance = instance.copy( instance );

				checkCopy( copiedInstance, assert );
				checkVertexAndColors( copiedInstance, assert );

			} );

			QUnit.test( "copy (more)", ( assert ) => {

				var instance = new Face3( 0, 1, 2,
					[ new Vector3( 0, 1, 0 ), new Vector3( 1, 0, 1 ) ],
					[ new Color( 0.25, 0.5, 0.75 ), new Color( 1, 0, 0.4 ) ],
					2 );
				var copiedInstance = instance.copy( instance );

				checkCopy( copiedInstance, assert );
				checkVertexAndColorArrays( copiedInstance, assert );

			} );

			QUnit.test( "clone", ( assert ) => {

				var instance = new Face3( 0, 1, 2, new Vector3( 0, 1, 0 ), new Color( 0.25, 0.5, 0.75 ), 2 );
				var copiedInstance = instance.clone();

				checkCopy( copiedInstance, assert );
				checkVertexAndColors( copiedInstance, assert );

			} );

			function checkCopy( copiedInstance, assert ) {

				assert.ok( copiedInstance instanceof Face3, "copy created the correct type" );
				assert.ok(
					copiedInstance.a === 0 &&
					copiedInstance.b === 1 &&
					copiedInstance.c === 2 &&
					copiedInstance.materialIndex === 2
					, "properties where copied" );

			}

			function checkVertexAndColors( copiedInstance, assert ) {

				assert.ok(
					copiedInstance.normal.x === 0 && copiedInstance.normal.y === 1 && copiedInstance.normal.z === 0 &&
					copiedInstance.color.r === 0.25 && copiedInstance.color.g === 0.5 && copiedInstance.color.b === 0.75
					, "properties where copied" );

			}

			function checkVertexAndColorArrays( copiedInstance, assert ) {

				assert.ok(
					copiedInstance.vertexNormals[ 0 ].x === 0 && copiedInstance.vertexNormals[ 0 ].y === 1 && copiedInstance.vertexNormals[ 0 ].z === 0 &&
					copiedInstance.vertexNormals[ 1 ].x === 1 && copiedInstance.vertexNormals[ 1 ].y === 0 && copiedInstance.vertexNormals[ 1 ].z === 1 &&
					copiedInstance.vertexColors[ 0 ].r === 0.25 && copiedInstance.vertexColors[ 0 ].g === 0.5 && copiedInstance.vertexColors[ 0 ].b === 0.75 &&
					copiedInstance.vertexColors[ 1 ].r === 1 && copiedInstance.vertexColors[ 1 ].g === 0 && copiedInstance.vertexColors[ 1 ].b === 0.4
					, "properties where copied" );

			}

		} );

	} );

	/**
	 * @author clockworkgeek / https://github.com/clockworkgeek
	 * @author timothypratley / https://github.com/timothypratley
	 * @author WestLangley / http://github.com/WestLangley
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// PolyhedronGeometry

	function PolyhedronGeometry( vertices, indices, radius, detail ) {

		Geometry.call( this );

		this.type = 'PolyhedronGeometry';

		this.parameters = {
			vertices: vertices,
			indices: indices,
			radius: radius,
			detail: detail
		};

		this.fromBufferGeometry( new PolyhedronBufferGeometry( vertices, indices, radius, detail ) );
		this.mergeVertices();

	}

	PolyhedronGeometry.prototype = Object.create( Geometry.prototype );
	PolyhedronGeometry.prototype.constructor = PolyhedronGeometry;

	// PolyhedronBufferGeometry

	function PolyhedronBufferGeometry( vertices, indices, radius, detail ) {

		BufferGeometry.call( this );

		this.type = 'PolyhedronBufferGeometry';

		this.parameters = {
			vertices: vertices,
			indices: indices,
			radius: radius,
			detail: detail
		};

		radius = radius || 1;
		detail = detail || 0;

		// default buffer data

		var vertexBuffer = [];
		var uvBuffer = [];

		// the subdivision creates the vertex buffer data

		subdivide( detail );

		// all vertices should lie on a conceptual sphere with a given radius

		appplyRadius( radius );

		// finally, create the uv data

		generateUVs();

		// build non-indexed geometry

		this.addAttribute( 'position', new Float32BufferAttribute( vertexBuffer, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( vertexBuffer.slice(), 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvBuffer, 2 ) );

		if ( detail === 0 ) {

			this.computeVertexNormals(); // flat normals

		} else {

			this.normalizeNormals(); // smooth normals

		}

		// helper functions

		function subdivide( detail ) {

			var a = new Vector3();
			var b = new Vector3();
			var c = new Vector3();

			// iterate over all faces and apply a subdivison with the given detail value

			for ( var i = 0; i < indices.length; i += 3 ) {

				// get the vertices of the face

				getVertexByIndex( indices[ i + 0 ], a );
				getVertexByIndex( indices[ i + 1 ], b );
				getVertexByIndex( indices[ i + 2 ], c );

				// perform subdivision

				subdivideFace( a, b, c, detail );

			}

		}

		function subdivideFace( a, b, c, detail ) {

			var cols = Math.pow( 2, detail );

			// we use this multidimensional array as a data structure for creating the subdivision

			var v = [];

			var i, j;

			// construct all of the vertices for this subdivision

			for ( i = 0; i <= cols; i ++ ) {

				v[ i ] = [];

				var aj = a.clone().lerp( c, i / cols );
				var bj = b.clone().lerp( c, i / cols );

				var rows = cols - i;

				for ( j = 0; j <= rows; j ++ ) {

					if ( j === 0 && i === cols ) {

						v[ i ][ j ] = aj;

					} else {

						v[ i ][ j ] = aj.clone().lerp( bj, j / rows );

					}

				}

			}

			// construct all of the faces

			for ( i = 0; i < cols; i ++ ) {

				for ( j = 0; j < 2 * ( cols - i ) - 1; j ++ ) {

					var k = Math.floor( j / 2 );

					if ( j % 2 === 0 ) {

						pushVertex( v[ i ][ k + 1 ] );
						pushVertex( v[ i + 1 ][ k ] );
						pushVertex( v[ i ][ k ] );

					} else {

						pushVertex( v[ i ][ k + 1 ] );
						pushVertex( v[ i + 1 ][ k + 1 ] );
						pushVertex( v[ i + 1 ][ k ] );

					}

				}

			}

		}

		function appplyRadius( radius ) {

			var vertex = new Vector3();

			// iterate over the entire buffer and apply the radius to each vertex

			for ( var i = 0; i < vertexBuffer.length; i += 3 ) {

				vertex.x = vertexBuffer[ i + 0 ];
				vertex.y = vertexBuffer[ i + 1 ];
				vertex.z = vertexBuffer[ i + 2 ];

				vertex.normalize().multiplyScalar( radius );

				vertexBuffer[ i + 0 ] = vertex.x;
				vertexBuffer[ i + 1 ] = vertex.y;
				vertexBuffer[ i + 2 ] = vertex.z;

			}

		}

		function generateUVs() {

			var vertex = new Vector3();

			for ( var i = 0; i < vertexBuffer.length; i += 3 ) {

				vertex.x = vertexBuffer[ i + 0 ];
				vertex.y = vertexBuffer[ i + 1 ];
				vertex.z = vertexBuffer[ i + 2 ];

				var u = azimuth( vertex ) / 2 / Math.PI + 0.5;
				var v = inclination( vertex ) / Math.PI + 0.5;
				uvBuffer.push( u, 1 - v );

			}

			correctUVs();

			correctSeam();

		}

		function correctSeam() {

			// handle case when face straddles the seam, see #3269

			for ( var i = 0; i < uvBuffer.length; i += 6 ) {

				// uv data of a single face

				var x0 = uvBuffer[ i + 0 ];
				var x1 = uvBuffer[ i + 2 ];
				var x2 = uvBuffer[ i + 4 ];

				var max = Math.max( x0, x1, x2 );
				var min = Math.min( x0, x1, x2 );

				// 0.9 is somewhat arbitrary

				if ( max > 0.9 && min < 0.1 ) {

					if ( x0 < 0.2 ) uvBuffer[ i + 0 ] += 1;
					if ( x1 < 0.2 ) uvBuffer[ i + 2 ] += 1;
					if ( x2 < 0.2 ) uvBuffer[ i + 4 ] += 1;

				}

			}

		}

		function pushVertex( vertex ) {

			vertexBuffer.push( vertex.x, vertex.y, vertex.z );

		}

		function getVertexByIndex( index, vertex ) {

			var stride = index * 3;

			vertex.x = vertices[ stride + 0 ];
			vertex.y = vertices[ stride + 1 ];
			vertex.z = vertices[ stride + 2 ];

		}

		function correctUVs() {

			var a = new Vector3();
			var b = new Vector3();
			var c = new Vector3();

			var centroid = new Vector3();

			var uvA = new Vector2();
			var uvB = new Vector2();
			var uvC = new Vector2();

			for ( var i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6 ) {

				a.set( vertexBuffer[ i + 0 ], vertexBuffer[ i + 1 ], vertexBuffer[ i + 2 ] );
				b.set( vertexBuffer[ i + 3 ], vertexBuffer[ i + 4 ], vertexBuffer[ i + 5 ] );
				c.set( vertexBuffer[ i + 6 ], vertexBuffer[ i + 7 ], vertexBuffer[ i + 8 ] );

				uvA.set( uvBuffer[ j + 0 ], uvBuffer[ j + 1 ] );
				uvB.set( uvBuffer[ j + 2 ], uvBuffer[ j + 3 ] );
				uvC.set( uvBuffer[ j + 4 ], uvBuffer[ j + 5 ] );

				centroid.copy( a ).add( b ).add( c ).divideScalar( 3 );

				var azi = azimuth( centroid );

				correctUV( uvA, j + 0, a, azi );
				correctUV( uvB, j + 2, b, azi );
				correctUV( uvC, j + 4, c, azi );

			}

		}

		function correctUV( uv, stride, vector, azimuth ) {

			if ( ( azimuth < 0 ) && ( uv.x === 1 ) ) {

				uvBuffer[ stride ] = uv.x - 1;

			}

			if ( ( vector.x === 0 ) && ( vector.z === 0 ) ) {

				uvBuffer[ stride ] = azimuth / 2 / Math.PI + 0.5;

			}

		}

		// Angle around the Y axis, counter-clockwise when looking from above.

		function azimuth( vector ) {

			return Math.atan2( vector.z, - vector.x );

		}


		// Angle above the XZ plane.

		function inclination( vector ) {

			return Math.atan2( - vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );

		}

	}

	PolyhedronBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	PolyhedronBufferGeometry.prototype.constructor = PolyhedronBufferGeometry;

	/**
	 * @author Abe Pazos / https://hamoid.com
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// DodecahedronGeometry

	function DodecahedronGeometry( radius, detail ) {

		Geometry.call( this );

		this.type = 'DodecahedronGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

		this.fromBufferGeometry( new DodecahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();

	}

	DodecahedronGeometry.prototype = Object.create( Geometry.prototype );
	DodecahedronGeometry.prototype.constructor = DodecahedronGeometry;

	// DodecahedronBufferGeometry

	function DodecahedronBufferGeometry( radius, detail ) {

		var t = ( 1 + Math.sqrt( 5 ) ) / 2;
		var r = 1 / t;

		var vertices = [

			// (±1, ±1, ±1)
			- 1, - 1, - 1,	- 1, - 1, 1,
			- 1, 1, - 1, - 1, 1, 1,
			1, - 1, - 1, 1, - 1, 1,
			1, 1, - 1, 1, 1, 1,

			// (0, ±1/φ, ±φ)
			 0, - r, - t, 0, - r, t,
			 0, r, - t, 0, r, t,

			// (±1/φ, ±φ, 0)
			- r, - t, 0, - r, t, 0,
			 r, - t, 0, r, t, 0,

			// (±φ, 0, ±1/φ)
			- t, 0, - r, t, 0, - r,
			- t, 0, r, t, 0, r
		];

		var indices = [
			3, 11, 7, 	3, 7, 15, 	3, 15, 13,
			7, 19, 17, 	7, 17, 6, 	7, 6, 15,
			17, 4, 8, 	17, 8, 10, 	17, 10, 6,
			8, 0, 16, 	8, 16, 2, 	8, 2, 10,
			0, 12, 1, 	0, 1, 18, 	0, 18, 16,
			6, 10, 2, 	6, 2, 13, 	6, 13, 15,
			2, 16, 18, 	2, 18, 3, 	2, 3, 13,
			18, 1, 9, 	18, 9, 11, 	18, 11, 3,
			4, 14, 12, 	4, 12, 0, 	4, 0, 8,
			11, 9, 5, 	11, 5, 19, 	11, 19, 7,
			19, 5, 14, 	19, 14, 4, 	19, 4, 17,
			1, 12, 14, 	1, 14, 5, 	1, 5, 9
		];

		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

		this.type = 'DodecahedronBufferGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

	}

	DodecahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	DodecahedronBufferGeometry.prototype.constructor = DodecahedronBufferGeometry;

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	function getGeometryByParams( x1, y1, z1, x2, y2, z2, x3, y3, z3 ) {

		var geometry = new Geometry();

		// a triangle
		geometry.vertices = [
			new Vector3( x1, y1, z1 ),
			new Vector3( x2, y2, z2 ),
			new Vector3( x3, y3, z3 )
		];

		return geometry;

	}

	function getGeometry() {

		return getGeometryByParams( - 0.5, 0, 0, 0.5, 0, 0, 0, 1, 0 );

	}

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Geometry', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isGeometry", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "applyMatrix", ( assert ) => {

				var geometry = getGeometry();
				geometry.faces.push( new Face3( 0, 1, 2 ) );
				var m = new Matrix4();
				var expectedVerts = [
					new Vector3( 1.5, 3, 4 ),
					new Vector3( 2.5, 3, 4 ),
					new Vector3( 2, 3, 5 )
				];
				var v0, v1, v2;

				m.makeRotationX( Math.PI / 2 );
				m.setPosition( new Vector3( x, y, z ) );

				geometry.applyMatrix( m );

				v0 = geometry.vertices[ 0 ];
				v1 = geometry.vertices[ 1 ];
				v2 = geometry.vertices[ 2 ];
				assert.ok(
					Math.abs( v0.x - expectedVerts[ 0 ].x ) <= eps &&
					Math.abs( v0.y - expectedVerts[ 0 ].y ) <= eps &&
					Math.abs( v0.z - expectedVerts[ 0 ].z ) <= eps,
					"First vertex is as expected"
				);
				assert.ok(
					Math.abs( v1.x - expectedVerts[ 1 ].x ) <= eps &&
					Math.abs( v1.y - expectedVerts[ 1 ].y ) <= eps &&
					Math.abs( v1.z - expectedVerts[ 1 ].z ) <= eps,
					"Second vertex is as expected"
				);
				assert.ok(
					Math.abs( v2.x - expectedVerts[ 2 ].x ) <= eps &&
					Math.abs( v2.y - expectedVerts[ 2 ].y ) <= eps &&
					Math.abs( v2.z - expectedVerts[ 2 ].z ) <= eps,
					"Third vertex is as expected"
				);

			} );

			QUnit.test( "rotateX", ( assert ) => {

				var geometry = getGeometry();

				var matrix = new Matrix4();
				matrix.makeRotationX( Math.PI / 2 ); // 90 degree

				geometry.applyMatrix( matrix );

				var v0 = geometry.vertices[ 0 ], v1 = geometry.vertices[ 1 ], v2 = geometry.vertices[ 2 ];
				assert.ok( v0.x === - 0.5 && v0.y === 0 && v0.z === 0, "first vertex was rotated" );
				assert.ok( v1.x === 0.5 && v1.y === 0 && v1.z === 0, "second vertex was rotated" );
				assert.ok( v2.x === 0 && v2.y < Number.EPSILON && v2.z === 1, "third vertex was rotated" );

			} );

			QUnit.test( "rotateY", ( assert ) => {

				var geometry = getGeometry();

				var matrix = new Matrix4();
				matrix.makeRotationY( Math.PI ); // 180 degrees

				geometry.applyMatrix( matrix );

				var v0 = geometry.vertices[ 0 ], v1 = geometry.vertices[ 1 ], v2 = geometry.vertices[ 2 ];
				assert.ok( v0.x === 0.5 && v0.y === 0 && v0.z < Number.EPSILON, "first vertex was rotated" );
				assert.ok( v1.x === - 0.5 && v1.y === 0 && v1.z < Number.EPSILON, "second vertex was rotated" );
				assert.ok( v2.x === 0 && v2.y === 1 && v2.z === 0, "third vertex was rotated" );

			} );

			QUnit.test( "rotateZ", ( assert ) => {

				var geometry = getGeometry();

				var matrix = new Matrix4();
				matrix.makeRotationZ( Math.PI / 2 * 3 ); // 270 degrees

				geometry.applyMatrix( matrix );

				var v0 = geometry.vertices[ 0 ], v1 = geometry.vertices[ 1 ], v2 = geometry.vertices[ 2 ];
				assert.ok( v0.x < Number.EPSILON && v0.y === 0.5 && v0.z === 0, "first vertex was rotated" );
				assert.ok( v1.x < Number.EPSILON && v1.y === - 0.5 && v1.z === 0, "second vertex was rotated" );
				assert.ok( v2.x === 1 && v2.y < Number.EPSILON && v2.z === 0, "third vertex was rotated" );

			} );

			QUnit.test( "translate", ( assert ) => {

				var a = getGeometry();
				var expected = [
					new Vector3( - 2.5, 3, - 4 ),
					new Vector3( - 1.5, 3, - 4 ),
					new Vector3( - 2, 4, - 4 )
				];
				var v;

				a.translate( - x, y, - z );

				for ( var i = 0; i < a.vertices.length; i ++ ) {

					v = a.vertices[ i ];
					assert.ok(
						Math.abs( v.x - expected[ i ].x ) <= eps &&
						Math.abs( v.y - expected[ i ].y ) <= eps &&
						Math.abs( v.z - expected[ i ].z ) <= eps,
						"Vertex #" + i + " was translated as expected"
					);

				}

			} );

			QUnit.test( "scale", ( assert ) => {

				var a = getGeometry();
				var expected = [
					new Vector3( - 1, 0, 0 ),
					new Vector3( 1, 0, 0 ),
					new Vector3( 0, 3, 0 )
				];
				var v;

				a.scale( 2, 3, 4 );

				for ( var i = 0; i < a.vertices.length; i ++ ) {

					v = a.vertices[ i ];
					assert.ok(
						Math.abs( v.x - expected[ i ].x ) <= eps &&
						Math.abs( v.y - expected[ i ].y ) <= eps &&
						Math.abs( v.z - expected[ i ].z ) <= eps,
						"Vertex #" + i + " was scaled as expected"
					);

				}

			} );

			QUnit.test( "lookAt", ( assert ) => {

				var a = getGeometry();
				var expected = [
					new Vector3( - 0.5, 0, 0 ),
					new Vector3( 0.5, 0, 0 ),
					new Vector3( 0, 0.5 * Math.sqrt( 2 ), 0.5 * Math.sqrt( 2 ) )
				];

				a.lookAt( new Vector3( 0, - 1, 1 ) );

				for ( var i = 0; i < a.vertices.length; i ++ ) {

					var v = a.vertices[ i ];
					assert.ok(
						Math.abs( v.x - expected[ i ].x ) <= eps &&
						Math.abs( v.y - expected[ i ].y ) <= eps &&
						Math.abs( v.z - expected[ i ].z ) <= eps,
						"Vertex #" + i + " was adjusted as expected"
					);

				}

			} );

			QUnit.test( "fromBufferGeometry", ( assert ) => {

				var bufferGeometry = new BufferGeometry();
				bufferGeometry.addAttribute( 'position', new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ), 3 ) );
				bufferGeometry.addAttribute( 'color', new BufferAttribute( new Float32Array( [ 0, 0, 0, 0.5, 0.5, 0.5, 1, 1, 1 ] ), 3 ) );
				bufferGeometry.addAttribute( 'normal', new BufferAttribute( new Float32Array( [ 0, 1, 0, 1, 0, 1, 1, 1, 0 ] ), 3 ) );
				bufferGeometry.addAttribute( 'uv', new BufferAttribute( new Float32Array( [ 0, 0, 0, 1, 1, 1 ] ), 2 ) );
				bufferGeometry.addAttribute( 'uv2', new BufferAttribute( new Float32Array( [ 0, 0, 0, 1, 1, 1 ] ), 2 ) );

				var geometry = new Geometry().fromBufferGeometry( bufferGeometry );

				var colors = geometry.colors;
				assert.ok(
					colors[ 0 ].r === 0 && colors[ 0 ].g === 0 && colors[ 0 ].b === 0 &&
					colors[ 1 ].r === 0.5 && colors[ 1 ].g === 0.5 && colors[ 1 ].b === 0.5 &&
					colors[ 2 ].r === 1 && colors[ 2 ].g === 1 && colors[ 2 ].b === 1
					, "colors were created well" );

				var vertices = geometry.vertices;
				assert.ok(
					vertices[ 0 ].x === 1 && vertices[ 0 ].y === 2 && vertices[ 0 ].z === 3 &&
					vertices[ 1 ].x === 4 && vertices[ 1 ].y === 5 && vertices[ 1 ].z === 6 &&
					vertices[ 2 ].x === 7 && vertices[ 2 ].y === 8 && vertices[ 2 ].z === 9
					, "vertices were created well" );

				var vNormals = geometry.faces[ 0 ].vertexNormals;
				assert.ok(
					vNormals[ 0 ].x === 0 && vNormals[ 0 ].y === 1 && vNormals[ 0 ].z === 0 &&
					vNormals[ 1 ].x === 1 && vNormals[ 1 ].y === 0 && vNormals[ 1 ].z === 1 &&
					vNormals[ 2 ].x === 1 && vNormals[ 2 ].y === 1 && vNormals[ 2 ].z === 0
					, "vertex normals were created well" );

			} );

			QUnit.test( "center", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "normalize", ( assert ) => {

				var geometry = getGeometry();
				geometry.computeLineDistances();

				var distances = geometry.lineDistances;
				assert.ok( distances[ 0 ] === 0, "distance to the 1st point is 0" );
				assert.ok( distances[ 1 ] === 1 + distances[ 0 ], "distance from the 1st to the 2nd is sqrt(2nd - 1st) + distance - 1" );
				assert.ok( distances[ 2 ] === Math.sqrt( 0.5 * 0.5 + 1 ) + distances[ 1 ], "distance from the 1st to the 3nd is sqrt(3rd - 2nd) + distance - 1" );

			} );

			QUnit.test( "normalize (actual)", ( assert ) => {

				var a = getGeometry();
				var sqrt = 0.5 * Math.sqrt( 2 );
				var expected = [
					new Vector3( - sqrt, - sqrt, 0 ),
					new Vector3( sqrt, - sqrt, 0 ),
					new Vector3( 0, sqrt, 0 )
				];
				var v;

				a.normalize();

				for ( var i = 0; i < a.vertices.length; i ++ ) {

					v = a.vertices[ i ];
					assert.ok(
						Math.abs( v.x - expected[ i ].x ) <= eps &&
						Math.abs( v.y - expected[ i ].y ) <= eps &&
						Math.abs( v.z - expected[ i ].z ) <= eps,
						"Vertex #" + i + " was normalized as expected"
					);

				}

			} );

			QUnit.test( "computeFaceNormals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "computeVertexNormals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "computeFlatVertexNormals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "computeMorphNormals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "computeLineDistances", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "computeBoundingBox", ( assert ) => {

				var a = new DodecahedronGeometry();

				a.computeBoundingBox();
				assert.strictEqual( a.boundingBox.isEmpty(), false, "Bounding box isn't empty" );

				var allIn = true;
				for ( var i = 0; i < a.vertices.length; i ++ ) {

					if ( ! a.boundingBox.containsPoint( a.vertices[ i ] ) ) {

						allIn = false;

					}

				}
				assert.strictEqual( allIn, true, "All vertices are inside the box" );

			} );

			QUnit.test( "computeBoundingSphere", ( assert ) => {

				var a = new DodecahedronGeometry();

				a.computeBoundingSphere();

				var allIn = true;
				for ( var i = 0; i < a.vertices.length; i ++ ) {

					if ( ! a.boundingSphere.containsPoint( a.vertices[ i ] ) ) {

						allIn = false;

					}

				}
				assert.strictEqual( allIn, true, "All vertices are inside the bounding sphere" );

			} );

			QUnit.test( "merge", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "mergeMesh", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "mergeVertices", ( assert ) => {

				var a = new Geometry();
				var b = new BoxBufferGeometry( 1, 1, 1 );
				var verts, faces, removed;

				a.fromBufferGeometry( b );

				removed = a.mergeVertices();
				verts = a.vertices.length;
				faces = a.faces.length;

				assert.strictEqual( removed, 16, "Removed the expected number of vertices" );
				assert.strictEqual( verts, 8, "Minimum number of vertices remaining" );
				assert.strictEqual( faces, 12, "Minimum number of faces remaining" );

			} );

			QUnit.test( "sortFacesByMaterialIndex", ( assert ) => {

				var box = new BoxBufferGeometry( 1, 1, 1 );
				var a = new Geometry().fromBufferGeometry( box );
				var expected = [ 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5 ];

				a.faces.reverse(); // a bit too simple probably, still missing stuff like checking new UVs
				a.sortFacesByMaterialIndex();

				var indices = [];

				for ( var i = 0; i < a.faces.length; i ++ ) {

					indices.push( a.faces[ i ].materialIndex );

				}

				assert.deepEqual( indices, expected, "Faces in correct order" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				var a = getGeometry();
				var gold = {
					"metadata": {
						"version": 4.5,
						"type": "Geometry",
						"generator": "Geometry.toJSON"
					},
					"uuid": null,
					"type": "Geometry",
					"data": {
						"vertices": [ - 0.5, 0, 0, 0.5, 0, 0, 0, 1, 0 ],
						"normals": [ 0, 0, 1 ],
						"faces": [ 50, 0, 1, 2, 0, 0, 0, 0, 0 ]
					}
				};
				var json;

				a.faces.push( new Face3( 0, 1, 2 ) );
				a.computeFaceNormals();
				a.computeVertexNormals();

				json = a.toJSON();
				json.uuid = null;
				assert.deepEqual( json, gold, "Generated JSON is as expected" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */

	function InstancedBufferAttribute( array, itemSize, meshPerAttribute ) {

		BufferAttribute.call( this, array, itemSize );

		this.meshPerAttribute = meshPerAttribute || 1;

	}

	InstancedBufferAttribute.prototype = Object.assign( Object.create( BufferAttribute.prototype ), {

		constructor: InstancedBufferAttribute,

		isInstancedBufferAttribute: true,

		copy: function ( source ) {

			BufferAttribute.prototype.copy.call( this, source );

			this.meshPerAttribute = source.meshPerAttribute;

			return this;

		}

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'InstancedBufferAttribute', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var instance = new InstancedBufferAttribute( new Float32Array( 10 ), 2 );
				assert.ok( instance.meshPerAttribute === 1, "ok" );

				var instance = new InstancedBufferAttribute( new Float32Array( 10 ), 2, 123 );
				assert.ok( instance.meshPerAttribute === 123, "ok" );

			} );

			// PUBLIC STUFF
			QUnit.test( "copy", ( assert ) => {

				var array = new Float32Array( [ 1, 2, 3, 7, 8, 9 ] );
				var instance = new InstancedBufferAttribute( array, 2, 123 );
				var copiedInstance = instance.copy( instance );

				assert.ok( copiedInstance instanceof InstancedBufferAttribute, "the clone has the correct type" );
				assert.ok( copiedInstance.itemSize === 2, "itemSize was copied" );
				assert.ok( copiedInstance.meshPerAttribute === 123, "meshPerAttribute was copied" );

				for ( var i = 0; i < array.length; i ++ ) {

					assert.ok( copiedInstance.array[ i ] === array[ i ], "array was copied" );

				}

			} );

		} );

	} );

	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */

	function InstancedBufferGeometry() {

		BufferGeometry.call( this );

		this.type = 'InstancedBufferGeometry';
		this.maxInstancedCount = undefined;

	}

	InstancedBufferGeometry.prototype = Object.assign( Object.create( BufferGeometry.prototype ), {

		constructor: InstancedBufferGeometry,

		isInstancedBufferGeometry: true,

		copy: function ( source ) {

			BufferGeometry.prototype.copy.call( this, source );

			this.maxInstancedCount = source.maxInstancedCount;

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		}

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'InstancedBufferGeometry', () => {

			function createClonableMock() {

				return {
					callCount: 0,
					clone: function () {

						this.callCount ++;
						return this;

					}
				};

			}

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "copy", ( assert ) => {

				var instanceMock1 = {};
				var instanceMock2 = {};
				var indexMock = createClonableMock();
				var defaultAttribute1 = new BufferAttribute( new Float32Array( [ 1 ] ) );
				var defaultAttribute2 = new BufferAttribute( new Float32Array( [ 2 ] ) );

				var instance = new InstancedBufferGeometry();

				instance.addGroup( 0, 10, instanceMock1 );
				instance.addGroup( 10, 5, instanceMock2 );
				instance.setIndex( indexMock );
				instance.addAttribute( 'defaultAttribute1', defaultAttribute1 );
				instance.addAttribute( 'defaultAttribute2', defaultAttribute2 );

				var copiedInstance = new InstancedBufferGeometry().copy( instance );

				assert.ok( copiedInstance instanceof InstancedBufferGeometry, "the clone has the correct type" );

				assert.equal( copiedInstance.index, indexMock, "index was copied" );
				assert.equal( copiedInstance.index.callCount, 1, "index.clone was called once" );

				assert.ok( copiedInstance.attributes[ 'defaultAttribute1' ] instanceof BufferAttribute, "attribute was created" );
				assert.deepEqual( copiedInstance.attributes[ 'defaultAttribute1' ].array, defaultAttribute1.array, "attribute was copied" );
				assert.deepEqual( copiedInstance.attributes[ 'defaultAttribute2' ].array, defaultAttribute2.array, "attribute was copied" );

				assert.equal( copiedInstance.groups[ 0 ].start, 0, "group was copied" );
				assert.equal( copiedInstance.groups[ 0 ].count, 10, "group was copied" );
				assert.equal( copiedInstance.groups[ 0 ].materialIndex, instanceMock1, "group was copied" );

				assert.equal( copiedInstance.groups[ 1 ].start, 10, "group was copied" );
				assert.equal( copiedInstance.groups[ 1 ].count, 5, "group was copied" );
				assert.equal( copiedInstance.groups[ 1 ].materialIndex, instanceMock2, "group was copied" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */

	function InterleavedBuffer( array, stride ) {

		this.uuid = _Math.generateUUID();

		this.array = array;
		this.stride = stride;
		this.count = array !== undefined ? array.length / stride : 0;

		this.dynamic = false;
		this.updateRange = { offset: 0, count: - 1 };

		this.onUploadCallback = function () {};

		this.version = 0;

	}

	Object.defineProperty( InterleavedBuffer.prototype, 'needsUpdate', {

		set: function ( value ) {

			if ( value === true ) this.version ++;

		}

	} );

	Object.assign( InterleavedBuffer.prototype, {

		isInterleavedBuffer: true,

		setArray: function ( array ) {

			if ( Array.isArray( array ) ) {

				throw new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );

			}

			this.count = array !== undefined ? array.length / this.stride : 0;
			this.array = array;

		},

		setDynamic: function ( value ) {

			this.dynamic = value;

			return this;

		},

		copy: function ( source ) {

			this.array = new source.array.constructor( source.array );
			this.count = source.count;
			this.stride = source.stride;
			this.dynamic = source.dynamic;

			return this;

		},

		copyAt: function ( index1, attribute, index2 ) {

			index1 *= this.stride;
			index2 *= attribute.stride;

			for ( var i = 0, l = this.stride; i < l; i ++ ) {

				this.array[ index1 + i ] = attribute.array[ index2 + i ];

			}

			return this;

		},

		set: function ( value, offset ) {

			if ( offset === undefined ) offset = 0;

			this.array.set( value, offset );

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		onUpload: function ( callback ) {

			this.onUploadCallback = callback;

			return this;

		}

	} );

	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */

	function InstancedInterleavedBuffer( array, stride, meshPerAttribute ) {

		InterleavedBuffer.call( this, array, stride );

		this.meshPerAttribute = meshPerAttribute || 1;

	}

	InstancedInterleavedBuffer.prototype = Object.assign( Object.create( InterleavedBuffer.prototype ), {

		constructor: InstancedInterleavedBuffer,

		isInstancedInterleavedBuffer: true,

		copy: function ( source ) {

			InterleavedBuffer.prototype.copy.call( this, source );

			this.meshPerAttribute = source.meshPerAttribute;

			return this;

		}

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'InstancedInterleavedBuffer', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var array = new Float32Array( [ 1, 2, 3, 7, 8, 9 ] );
				var instance = new InstancedInterleavedBuffer( array, 3 );

				assert.ok( instance.meshPerAttribute === 1, "ok" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isInstancedInterleavedBuffer", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var array = new Float32Array( [ 1, 2, 3, 7, 8, 9 ] );
				var instance = new InstancedInterleavedBuffer( array, 3 );
				var copiedInstance = instance.copy( instance );

				assert.ok( copiedInstance.meshPerAttribute === 1, "additional attribute was copied" );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'InterleavedBuffer', () => {

			function checkInstanceAgainstCopy( instance, copiedInstance, assert ) {

				assert.ok( copiedInstance instanceof InterleavedBuffer, "the clone has the correct type" );

				for ( var i = 0; i < instance.array.length; i ++ ) {

					assert.ok( copiedInstance.array[ i ] === instance.array[ i ], "array was copied" );

				}

				assert.ok( copiedInstance.stride === instance.stride, "stride was copied" );
				assert.ok( copiedInstance.dynamic === true, "dynamic was copied" );

			}

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "needsUpdate", ( assert ) => {

				var a = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 4 ], 2 ) );

				a.needsUpdate = true;

				assert.strictEqual( a.version, 1, "Check version increased" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isInterleavedBuffer", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setArray", ( assert ) => {

				var f32a = new Float32Array( [ 1, 2, 3, 4 ] );
				var f32b = new Float32Array( [] );
				var a = new InterleavedBuffer( f32a, 2, false );

				a.setArray( f32a );

				assert.strictEqual( a.count, 2, "Check item count for non-empty array" );
				assert.strictEqual( a.array, f32a, "Check array itself" );

				a.setArray( f32b );

				assert.strictEqual( a.count, 0, "Check item count for empty array" );
				assert.strictEqual( a.array, f32b, "Check array itself" );

				assert.throws(
					function () {

						a.setArray( [ 1, 2, 3, 4 ] );

					},
					/array should be a Typed Array/,
					"Calling setArray with a non-typed array throws Error"
				);

			} );

			QUnit.test( "setDynamic", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var array = new Float32Array( [ 1, 2, 3, 7, 8, 9 ] );
				var instance = new InterleavedBuffer( array, 3 );
				instance.setDynamic( true );

				checkInstanceAgainstCopy( instance, instance.copy( instance ), assert );

			} );

			QUnit.test( "copyAt", ( assert ) => {

				var a = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ), 3 );
				var b = new InterleavedBuffer( new Float32Array( 9 ), 3 );
				var expected = new Float32Array( [ 4, 5, 6, 7, 8, 9, 1, 2, 3 ] );

				b.copyAt( 1, a, 2 );
				b.copyAt( 0, a, 1 );
				b.copyAt( 2, a, 0 );

				assert.deepEqual( b.array, expected, "Check the right values were replaced" );

			} );

			QUnit.test( "set", ( assert ) => {

				var instance = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 7, 8, 9 ] ), 3 );

				instance.set( [ 0, - 1 ] );
				assert.ok( instance.array[ 0 ] === 0 && instance.array[ 1 ] === - 1, "replace at first by default" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var array = new Float32Array( [ 1, 2, 3, 7, 8, 9 ] );
				var instance = new InterleavedBuffer( array, 3 );
				instance.setDynamic( true );

				checkInstanceAgainstCopy( instance, instance.clone(), assert );

			} );

			QUnit.test( "onUpload", ( assert ) => {

				var a = new InterleavedBuffer();
				var func = function () { };

				a.onUpload( func );

				assert.strictEqual( a.onUploadCallback, func, "Check callback was set properly" );

			} );

			// OTHERS
			QUnit.test( "count", ( assert ) => {

				var instance = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 7, 8, 9 ] ), 3 );

				assert.equal( instance.count, 2, "count is calculated via array length / stride" );

			} );

		} );

	} );

	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 */

	function InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, normalized ) {

		this.uuid = _Math.generateUUID();

		this.data = interleavedBuffer;
		this.itemSize = itemSize;
		this.offset = offset;

		this.normalized = normalized === true;

	}

	Object.defineProperties( InterleavedBufferAttribute.prototype, {

		count: {

			get: function () {

				return this.data.count;

			}

		},

		array: {

			get: function () {

				return this.data.array;

			}

		}

	} );

	Object.assign( InterleavedBufferAttribute.prototype, {

		isInterleavedBufferAttribute: true,

		setX: function ( index, x ) {

			this.data.array[ index * this.data.stride + this.offset ] = x;

			return this;

		},

		setY: function ( index, y ) {

			this.data.array[ index * this.data.stride + this.offset + 1 ] = y;

			return this;

		},

		setZ: function ( index, z ) {

			this.data.array[ index * this.data.stride + this.offset + 2 ] = z;

			return this;

		},

		setW: function ( index, w ) {

			this.data.array[ index * this.data.stride + this.offset + 3 ] = w;

			return this;

		},

		getX: function ( index ) {

			return this.data.array[ index * this.data.stride + this.offset ];

		},

		getY: function ( index ) {

			return this.data.array[ index * this.data.stride + this.offset + 1 ];

		},

		getZ: function ( index ) {

			return this.data.array[ index * this.data.stride + this.offset + 2 ];

		},

		getW: function ( index ) {

			return this.data.array[ index * this.data.stride + this.offset + 3 ];

		},

		setXY: function ( index, x, y ) {

			index = index * this.data.stride + this.offset;

			this.data.array[ index + 0 ] = x;
			this.data.array[ index + 1 ] = y;

			return this;

		},

		setXYZ: function ( index, x, y, z ) {

			index = index * this.data.stride + this.offset;

			this.data.array[ index + 0 ] = x;
			this.data.array[ index + 1 ] = y;
			this.data.array[ index + 2 ] = z;

			return this;

		},

		setXYZW: function ( index, x, y, z, w ) {

			index = index * this.data.stride + this.offset;

			this.data.array[ index + 0 ] = x;
			this.data.array[ index + 1 ] = y;
			this.data.array[ index + 2 ] = z;
			this.data.array[ index + 3 ] = w;

			return this;

		}

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'InterleavedBufferAttribute', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "count", ( assert ) => {

				var buffer = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 7, 8, 9 ] ), 3 );
				var instance = new InterleavedBufferAttribute( buffer, 2, 0 );

				assert.ok( instance.count === 2, "count is calculated via array length / stride" );

			} );

			QUnit.test( "array", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			// setY, setZ and setW are calculated in the same way so not QUnit.testing this
			// TODO: ( you can't be sure that will be the case in future, or a mistake was introduce in one off them ! )
			QUnit.test( "setX", ( assert ) => {

				var buffer = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 7, 8, 9 ] ), 3 );
				var instance = new InterleavedBufferAttribute( buffer, 2, 0 );

				instance.setX( 0, 123 );
				instance.setX( 1, 321 );

				assert.ok( instance.data.array[ 0 ] === 123 &&
					instance.data.array[ 3 ] === 321, "x was calculated correct based on index and default offset" );

				var buffer = new InterleavedBuffer( new Float32Array( [ 1, 2, 3, 7, 8, 9 ] ), 3 );
				var instance = new InterleavedBufferAttribute( buffer, 2, 1 );

				instance.setX( 0, 123 );
				instance.setX( 1, 321 );

				// the offset was defined as 1, so go one step futher in the array
				assert.ok( instance.data.array[ 1 ] === 123 &&
					instance.data.array[ 4 ] === 321, "x was calculated correct based on index and default offset" );

			} );

			QUnit.test( "setY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setZ", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setW", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getX", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getZ", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getW", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setXY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setXYZ", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setXYZW", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Layers', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Layers();

				a.set( 0 );
				assert.strictEqual( a.mask, 1, "Set channel 0" );

				a.set( 1 );
				assert.strictEqual( a.mask, 2, "Set channel 1" );

				a.set( 2 );
				assert.strictEqual( a.mask, 4, "Set channel 2" );

			} );

			QUnit.test( "enable", ( assert ) => {

				var a = new Layers();

				a.set( 0 );
				a.enable( 0 );
				assert.strictEqual( a.mask, 1, "Enable channel 0 with mask 0" );

				a.set( 0 );
				a.enable( 1 );
				assert.strictEqual( a.mask, 3, "Enable channel 1 with mask 0" );

				a.set( 1 );
				a.enable( 0 );
				assert.strictEqual( a.mask, 3, "Enable channel 0 with mask 1" );

				a.set( 1 );
				a.enable( 1 );
				assert.strictEqual( a.mask, 2, "Enable channel 1 with mask 1" );

			} );

			QUnit.test( "toggle", ( assert ) => {

				var a = new Layers();

				a.set( 0 );
				a.toggle( 0 );
				assert.strictEqual( a.mask, 0, "Toggle channel 0 with mask 0" );

				a.set( 0 );
				a.toggle( 1 );
				assert.strictEqual( a.mask, 3, "Toggle channel 1 with mask 0" );

				a.set( 1 );
				a.toggle( 0 );
				assert.strictEqual( a.mask, 3, "Toggle channel 0 with mask 1" );

				a.set( 1 );
				a.toggle( 1 );
				assert.strictEqual( a.mask, 0, "Toggle channel 1 with mask 1" );

			} );

			QUnit.test( "disable", ( assert ) => {

				var a = new Layers();

				a.set( 0 );
				a.disable( 0 );
				assert.strictEqual( a.mask, 0, "Disable channel 0 with mask 0" );

				a.set( 0 );
				a.disable( 1 );
				assert.strictEqual( a.mask, 1, "Disable channel 1 with mask 0" );

				a.set( 1 );
				a.disable( 0 );
				assert.strictEqual( a.mask, 2, "Disable channel 0 with mask 1" );

				a.set( 1 );
				a.disable( 1 );
				assert.strictEqual( a.mask, 0, "Disable channel 1 with mask 1" );

			} );

			QUnit.test( "test", ( assert ) => {

				var a = new Layers();
				var b = new Layers();

				assert.ok( a.test( b ), "Start out true" );

				a.set( 1 );
				assert.notOk( a.test( b ), "Set channel 1 in a and fail the QUnit.test" );

				b.toggle( 1 );
				assert.ok( a.test( b ), "Toggle channel 1 in b and pass again" );

			} );

		} );

	} );

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Object3D', () => {

			var RadToDeg = 180 / Math.PI;

			var eulerEquals = function ( a, b, tolerance ) {

				tolerance = tolerance || 0.0001;

				if ( a.order != b.order ) {

					return false;

				}

				return (
					Math.abs( a.x - b.x ) <= tolerance &&
					Math.abs( a.y - b.y ) <= tolerance &&
					Math.abs( a.z - b.z ) <= tolerance
				);

			};

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// STATIC STUFF
			QUnit.test( "DefaultUp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "DefaultMatrixAutoUpdate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isObject3D", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onBeforeRender", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onAfterRender", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "applyMatrix", ( assert ) => {

				var a = new Object3D();
				var m = new Matrix4();
				var expectedPos = new Vector3( x, y, z );
				var expectedQuat = new Quaternion( 0.5 * Math.sqrt( 2 ), 0, 0, 0.5 * Math.sqrt( 2 ) );

				m.makeRotationX( Math.PI / 2 );
				m.setPosition( new Vector3( x, y, z ) );

				a.applyMatrix( m );

				assert.deepEqual( a.position, expectedPos, "Position has the expected values" );
				assert.ok(
					Math.abs( a.quaternion.x - expectedQuat.x ) <= eps &&
					Math.abs( a.quaternion.y - expectedQuat.y ) <= eps &&
					Math.abs( a.quaternion.z - expectedQuat.z ) <= eps,
					"Quaternion has the expected values"
				);

			} );

			QUnit.test( "applyQuaternion", ( assert ) => {

				var a = new Object3D();
				var sqrt = 0.5 * Math.sqrt( 2 );
				var quat = new Quaternion( 0, sqrt, 0, sqrt );
				var expected = new Quaternion( sqrt / 2, sqrt / 2, 0, 0 );

				a.quaternion.set( 0.25, 0.25, 0.25, 0.25 );
				a.applyQuaternion( quat );

				assert.ok(
					Math.abs( a.quaternion.x - expected.x ) <= eps &&
					Math.abs( a.quaternion.y - expected.y ) <= eps &&
					Math.abs( a.quaternion.z - expected.z ) <= eps,
					"Quaternion has the expected values"
				);

			} );

			QUnit.test( "setRotationFromAxisAngle", ( assert ) => {

				var a = new Object3D();
				var axis = new Vector3( 0, 1, 0 );
				var angle = Math.PI;
				var expected = new Euler( - Math.PI, 0, - Math.PI );

				a.setRotationFromAxisAngle( axis, angle );
				assert.ok( eulerEquals( a.getWorldRotation(), expected ), "Correct values after rotation" );

				axis.set( 1, 0, 0 );
				var angle = 0;
				expected.set( 0, 0, 0 );

				a.setRotationFromAxisAngle( axis, angle );
				assert.ok( eulerEquals( a.getWorldRotation(), expected ), "Correct values after zeroing" );

			} );

			QUnit.test( "setRotationFromEuler", ( assert ) => {

				var a = new Object3D();
				var rotation = new Euler( ( 45 / RadToDeg ), 0, Math.PI );
				var expected = rotation.clone(); // bit obvious

				a.setRotationFromEuler( rotation );
				assert.ok( eulerEquals( a.getWorldRotation(), expected ), "Correct values after rotation" );

			} );

			QUnit.test( "setRotationFromMatrix", ( assert ) => {

				var a = new Object3D();
				var m = new Matrix4();
				var eye = new Vector3( 0, 0, 0 );
				var target = new Vector3( 0, 1, - 1 );
				var up = new Vector3( 0, 1, 0 );

				m.lookAt( eye, target, up );
				a.setRotationFromMatrix( m );
				assert.numEqual( a.getWorldRotation().x * RadToDeg, 45, "Correct rotation angle" );

			} );

			QUnit.test( "setRotationFromQuaternion", ( assert ) => {

				var a = new Object3D();
				var rotation = new Quaternion().setFromEuler( new Euler( Math.PI, 0, - Math.PI ) );
				var expected = new Euler( Math.PI, 0, - Math.PI );

				a.setRotationFromQuaternion( rotation );
				assert.ok( eulerEquals( a.getWorldRotation(), expected ), "Correct values after rotation" );

			} );

			QUnit.test( "rotateOnAxis", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "rotateOnWorldAxis", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "rotateX", ( assert ) => {

				var obj = new Object3D();

				var angleInRad = 1.562;
				obj.rotateX( angleInRad );

				assert.numEqual( obj.rotation.x, angleInRad, "x is equal" );

			} );

			QUnit.test( "rotateY", ( assert ) => {

				var obj = new Object3D();

				var angleInRad = - 0.346;
				obj.rotateY( angleInRad );

				assert.numEqual( obj.rotation.y, angleInRad, "y is equal" );

			} );

			QUnit.test( "rotateZ", ( assert ) => {

				var obj = new Object3D();

				var angleInRad = 1;
				obj.rotateZ( angleInRad );

				assert.numEqual( obj.rotation.z, angleInRad, "z is equal" );

			} );

			QUnit.test( "translateOnAxis", ( assert ) => {

				var obj = new Object3D();

				obj.translateOnAxis( new Vector3( 1, 0, 0 ), 1 );
				obj.translateOnAxis( new Vector3( 0, 1, 0 ), 1.23 );
				obj.translateOnAxis( new Vector3( 0, 0, 1 ), - 4.56 );

				assert.propEqual( obj.position, {
					x: 1,
					y: 1.23,
					z: - 4.56
				} );

			} );

			QUnit.test( "translateX", ( assert ) => {

				var obj = new Object3D();
				obj.translateX( 1.234 );

				assert.numEqual( obj.position.x, 1.234, "x is equal" );

			} );

			QUnit.test( "translateY", ( assert ) => {

				var obj = new Object3D();
				obj.translateY( 1.234 );

				assert.numEqual( obj.position.y, 1.234, "y is equal" );

			} );

			QUnit.test( "translateZ", ( assert ) => {

				var obj = new Object3D();
				obj.translateZ( 1.234 );

				assert.numEqual( obj.position.z, 1.234, "z is equal" );

			} );

			QUnit.test( "localToWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "worldToLocal", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "lookAt", ( assert ) => {

				var obj = new Object3D();
				obj.lookAt( new Vector3( 0, - 1, 1 ) );

				assert.numEqual( obj.rotation.x * RadToDeg, 45, "x is equal" );

			} );

			QUnit.test( "add/remove", ( assert ) => {

				var a = new Object3D();
				var child1 = new Object3D();
				var child2 = new Object3D();

				assert.strictEqual( a.children.length, 0, "Starts with no children" );

				a.add( child1 );
				assert.strictEqual( a.children.length, 1, "The first child was added" );
				assert.strictEqual( a.children[ 0 ], child1, "It's the right one" );

				a.add( child2 );
				assert.strictEqual( a.children.length, 2, "The second child was added" );
				assert.strictEqual( a.children[ 1 ], child2, "It's the right one" );
				assert.strictEqual( a.children[ 0 ], child1, "The first one is still there" );

				a.remove( child1 );
				assert.strictEqual( a.children.length, 1, "The first child was removed" );
				assert.strictEqual( a.children[ 0 ], child2, "The second one is still there" );

				a.add( child1 );
				a.remove( child1, child2 );
				assert.strictEqual( a.children.length, 0, "Both children were removed at once" );

				child1.add( child2 );
				assert.strictEqual( child1.children.length, 1, "The second child was added to the first one" );
				a.add( child2 );
				assert.strictEqual( a.children.length, 1, "The second one was added to the parent (no remove)" );
				assert.strictEqual( a.children[ 0 ], child2, "The second one is now the parent's child again" );
				assert.strictEqual( child1.children.length, 0, "The first one no longer has any children" );

			} );

			QUnit.test( "getObjectById/getObjectByName/getObjectByProperty", ( assert ) => {

				var parent = new Object3D();
				var childName = new Object3D();
				var childId = new Object3D(); // id = parent.id + 2
				var childNothing = new Object3D();

				parent.prop = true;
				childName.name = "foo";
				parent.add( childName, childId, childNothing );

				assert.strictEqual( parent.getObjectByProperty( 'prop', true ), parent, "Get parent by its own property" );
				assert.strictEqual( parent.getObjectByName( "foo" ), childName, "Get child by name" );
				assert.strictEqual( parent.getObjectById( parent.id + 2 ), childId, "Get child by Id" );
				assert.strictEqual(
					parent.getObjectByProperty( 'no-property', 'no-value' ), undefined,
					"Unknown property results in undefined"
				);

			} );

			QUnit.test( "getWorldPosition", ( assert ) => {

				var a = new Object3D();
				var b = new Object3D();
				var expectedSingle = new Vector3( x, y, z );
				var expectedParent = new Vector3( x, y, 0 );
				var expectedChild = new Vector3( x, y, 7 + ( z - z ) );

				a.translateX( x );
				a.translateY( y );
				a.translateZ( z );

				assert.deepEqual(
					a.getWorldPosition(), expectedSingle,
					"WorldPosition as expected for single object"
				);

				// translate child and then parent
				b.translateZ( 7 );
				a.add( b );
				a.translateZ( - z );

				assert.deepEqual( a.getWorldPosition(), expectedParent, "WorldPosition as expected for parent" );
				assert.deepEqual( b.getWorldPosition(), expectedChild, "WorldPosition as expected for child" );

			} );

			QUnit.test( "getWorldQuaternion", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getWorldRotation", ( assert ) => {

				var obj = new Object3D();

				obj.lookAt( new Vector3( 0, - 1, 1 ) );
				assert.numEqual( obj.getWorldRotation().x * RadToDeg, 45, "x is equal" );

				obj.lookAt( new Vector3( 1, 0, 0 ) );
				assert.numEqual( obj.getWorldRotation().y * RadToDeg, 90, "y is equal" );

			} );

			QUnit.test( "getWorldScale", ( assert ) => {

				var a = new Object3D();
				var m = new Matrix4().makeScale( x, y, z );
				var expected = new Vector3( x, y, z );

				a.applyMatrix( m );

				assert.deepEqual( a.getWorldScale(), expected, "WorldScale as expected" );

			} );

			QUnit.test( "getWorldDirection", ( assert ) => {

				var a = new Object3D();
				var expected = new Vector3( 0, - 0.5 * Math.sqrt( 2 ), 0.5 * Math.sqrt( 2 ) );
				var dir;

				a.lookAt( new Vector3( 0, - 1, 1 ) );
				dir = a.getWorldDirection();

				assert.ok(
					Math.abs( dir.x - expected.x ) <= eps &&
					Math.abs( dir.y - expected.y ) <= eps &&
					Math.abs( dir.z - expected.z ) <= eps,
					"Direction has the expected values"
				);

			} );

			QUnit.test( "raycast", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "traverse/traverseVisible/traverseAncestors", ( assert ) => {

				var a = new Object3D();
				var b = new Object3D();
				var c = new Object3D();
				var d = new Object3D();
				var names = [];
				var expectedNormal = [ "parent", "child", "childchild 1", "childchild 2" ];
				var expectedVisible = [ "parent", "child", "childchild 2" ];
				var expectedAncestors = [ "child", "parent" ];

				a.name = "parent";
				b.name = "child";
				c.name = "childchild 1";
				c.visible = false;
				d.name = "childchild 2";

				b.add( c );
				b.add( d );
				a.add( b );

				a.traverse( function ( obj ) {

					names.push( obj.name );

				} );
				assert.deepEqual( names, expectedNormal, "Traversed objects in expected order" );

				var names = [];
				a.traverseVisible( function ( obj ) {

					names.push( obj.name );

				} );
				assert.deepEqual( names, expectedVisible, "Traversed visible objects in expected order" );

				var names = [];
				c.traverseAncestors( function ( obj ) {

					names.push( obj.name );

				} );
				assert.deepEqual( names, expectedAncestors, "Traversed ancestors in expected order" );

			} );

			QUnit.test( "updateMatrix", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				var a = new Object3D();
				var child = new Object3D();
				var childChild = new Object3D();

				a.name = "a's name";
				a.matrix.set( 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 );
				a.visible = false;
				a.castShadow = true;
				a.receiveShadow = true;
				a.userData[ "foo" ] = "bar";

				child.uuid = "5D4E9AE8-DA61-4912-A575-71A5BE3D72CD";
				childChild.uuid = "B43854B3-E970-4E85-BD41-AAF8D7BFA189";
				child.add( childChild );
				a.add( child );

				var gold = {
					"metadata": {
						"version": 4.5,
						"type": "Object",
						"generator": "Object3D.toJSON"
					},
					"object": {
						"uuid": "0A1E4F43-CB5B-4097-8F82-DC2969C0B8C2",
						"type": "Object3D",
						"name": "a's name",
						"castShadow": true,
						"receiveShadow": true,
						"visible": false,
						"userData": { "foo": "bar" },
						"matrix": [ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ],
						"children": [
							{
								"uuid": "5D4E9AE8-DA61-4912-A575-71A5BE3D72CD",
								"type": "Object3D",
								"matrix": [ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 ],
								"children": [
									{
										"uuid": "B43854B3-E970-4E85-BD41-AAF8D7BFA189",
										"type": "Object3D",
										"matrix": [ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 ]
									}
								]
							}
						]
					}
				};

				// hacks
				var out = a.toJSON();
				out.object.uuid = "0A1E4F43-CB5B-4097-8F82-DC2969C0B8C2";

				assert.deepEqual( out, gold, "JSON is as expected" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var a;
				var b = new Object3D();

				assert.strictEqual( a, undefined, "Undefined pre-clone()" );

				a = b.clone();
				assert.notStrictEqual( a, b, "Defined but seperate instances post-clone()" );

				a.uuid = b.uuid;
				assert.deepEqual( a, b, "But identical properties" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Object3D();
				var b = new Object3D();
				var child = new Object3D();
				var childChild = new Object3D();

				a.name = "original";
				b.name = "to-be-copied";

				b.position.set( x, y, z );
				b.quaternion.set( x, y, z, w );
				b.scale.set( 2, 3, 4 );

				// bogus QUnit.test values
				b.matrix.set( 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 );
				b.matrixWorld.set( 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 );

				b.matrixAutoUpdate = false;
				b.matrixWorldNeedsUpdate = true;

				b.layers.mask = 2;
				b.visible = false;

				b.castShadow = true;
				b.receiveShadow = true;

				b.frustumCulled = false;
				b.renderOrder = 1;

				b.userData[ "foo" ] = "bar";

				child.add( childChild );
				b.add( child );

				assert.notDeepEqual( a, b, "Objects are not equal pre-copy()" );
				a.copy( b, true );

				// check they're all unique instances
				assert.ok(
					a.uuid !== b.uuid &&
					a.children[ 0 ].uuid !== b.children[ 0 ].uuid &&
					a.children[ 0 ].children[ 0 ].uuid !== b.children[ 0 ].children[ 0 ].uuid,
					"UUIDs are all different"
				);

				// and now fix that
				a.uuid = b.uuid;
				a.children[ 0 ].uuid = b.children[ 0 ].uuid;
				a.children[ 0 ].children[ 0 ].uuid = b.children[ 0 ].children[ 0 ].uuid;

				assert.deepEqual( a, b, "Objects are equal post-copy()" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author bhouston / http://clara.io/
	 * @author stephomi / http://stephaneginier.com/
	 */

	function Raycaster( origin, direction, near, far ) {

		this.ray = new Ray( origin, direction );
		// direction is assumed to be normalized (for accurate distance calculations)

		this.near = near || 0;
		this.far = far || Infinity;

		this.params = {
			Mesh: {},
			Line: {},
			LOD: {},
			Points: { threshold: 1 },
			Sprite: {}
		};

		Object.defineProperties( this.params, {
			PointCloud: {
				get: function () {

					console.warn( 'THREE.Raycaster: params.PointCloud has been renamed to params.Points.' );
					return this.Points;

				}
			}
		} );

	}

	function ascSort( a, b ) {

		return a.distance - b.distance;

	}

	function intersectObject( object, raycaster, intersects, recursive ) {

		if ( object.visible === false ) return;

		object.raycast( raycaster, intersects );

		if ( recursive === true ) {

			var children = object.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				intersectObject( children[ i ], raycaster, intersects, true );

			}

		}

	}

	Object.assign( Raycaster.prototype, {

		linePrecision: 1,

		set: function ( origin, direction ) {

			// direction is assumed to be normalized (for accurate distance calculations)

			this.ray.set( origin, direction );

		},

		setFromCamera: function ( coords, camera ) {

			if ( ( camera && camera.isPerspectiveCamera ) ) {

				this.ray.origin.setFromMatrixPosition( camera.matrixWorld );
				this.ray.direction.set( coords.x, coords.y, 0.5 ).unproject( camera ).sub( this.ray.origin ).normalize();

			} else if ( ( camera && camera.isOrthographicCamera ) ) {

				this.ray.origin.set( coords.x, coords.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ).unproject( camera ); // set origin in plane of camera
				this.ray.direction.set( 0, 0, - 1 ).transformDirection( camera.matrixWorld );

			} else {

				console.error( 'THREE.Raycaster: Unsupported camera type.' );

			}

		},

		intersectObject: function ( object, recursive ) {

			var intersects = [];

			intersectObject( object, this, intersects, recursive );

			intersects.sort( ascSort );

			return intersects;

		},

		intersectObjects: function ( objects, recursive ) {

			var intersects = [];

			if ( Array.isArray( objects ) === false ) {

				console.warn( 'THREE.Raycaster.intersectObjects: objects is not an Array.' );
				return intersects;

			}

			for ( var i = 0, l = objects.length; i < l; i ++ ) {

				intersectObject( objects[ i ], this, intersects, recursive );

			}

			intersects.sort( ascSort );

			return intersects;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author benaadams / https://twitter.com/ben_a_adams
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// SphereGeometry

	function SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

		Geometry.call( this );

		this.type = 'SphereGeometry';

		this.parameters = {
			radius: radius,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			phiStart: phiStart,
			phiLength: phiLength,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		this.fromBufferGeometry( new SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) );
		this.mergeVertices();

	}

	SphereGeometry.prototype = Object.create( Geometry.prototype );
	SphereGeometry.prototype.constructor = SphereGeometry;

	// SphereBufferGeometry

	function SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {

		BufferGeometry.call( this );

		this.type = 'SphereBufferGeometry';

		this.parameters = {
			radius: radius,
			widthSegments: widthSegments,
			heightSegments: heightSegments,
			phiStart: phiStart,
			phiLength: phiLength,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		radius = radius || 1;

		widthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );
		heightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );

		phiStart = phiStart !== undefined ? phiStart : 0;
		phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;

		thetaStart = thetaStart !== undefined ? thetaStart : 0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;

		var thetaEnd = thetaStart + thetaLength;

		var ix, iy;

		var index = 0;
		var grid = [];

		var vertex = new Vector3();
		var normal = new Vector3();

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// generate vertices, normals and uvs

		for ( iy = 0; iy <= heightSegments; iy ++ ) {

			var verticesRow = [];

			var v = iy / heightSegments;

			for ( ix = 0; ix <= widthSegments; ix ++ ) {

				var u = ix / widthSegments;

				// vertex

				vertex.x = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
				vertex.y = radius * Math.cos( thetaStart + v * thetaLength );
				vertex.z = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );

				vertices.push( vertex.x, vertex.y, vertex.z );

				// normal

				normal.set( vertex.x, vertex.y, vertex.z ).normalize();
				normals.push( normal.x, normal.y, normal.z );

				// uv

				uvs.push( u, 1 - v );

				verticesRow.push( index ++ );

			}

			grid.push( verticesRow );

		}

		// indices

		for ( iy = 0; iy < heightSegments; iy ++ ) {

			for ( ix = 0; ix < widthSegments; ix ++ ) {

				var a = grid[ iy ][ ix + 1 ];
				var b = grid[ iy ][ ix ];
				var c = grid[ iy + 1 ][ ix ];
				var d = grid[ iy + 1 ][ ix + 1 ];

				if ( iy !== 0 || thetaStart > 0 ) indices.push( a, b, d );
				if ( iy !== heightSegments - 1 || thetaEnd < Math.PI ) indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

	}

	SphereBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	SphereBufferGeometry.prototype.constructor = SphereBufferGeometry;

	/**
	 * @author simonThiele / https://github.com/simonThiele
	 */
	/* global QUnit */

	function checkRayDirectionAgainstReferenceVector( rayDirection, refVector, assert ) {

		assert.ok( refVector.x - rayDirection.x <= Number.EPSILON && refVector.y - rayDirection.y <= Number.EPSILON && refVector.z - rayDirection.z <= Number.EPSILON, "camera is pointing to" +
			" the same direction as expected" );

	}

	function getRaycaster() {

		return new Raycaster(
			new Vector3( 0, 0, 0 ),
			new Vector3( 0, 0, - 1 ),
			1,
			100
		);

	}

	function getObjectsToCheck() {

		var objects = [];

		var sphere1 = getSphere();
		sphere1.position.set( 0, 0, - 10 );
		sphere1.name = 1;
		objects.push( sphere1 );

		var sphere11 = getSphere();
		sphere11.position.set( 0, 0, 1 );
		sphere11.name = 11;
		sphere1.add( sphere11 );

		var sphere12 = getSphere();
		sphere12.position.set( 0, 0, - 1 );
		sphere12.name = 12;
		sphere1.add( sphere12 );

		var sphere2 = getSphere();
		sphere2.position.set( - 5, 0, - 5 );
		sphere2.name = 2;
		objects.push( sphere2 );

		for ( var i = 0; i < objects.length; i ++ ) {

			objects[ i ].updateMatrixWorld();

		}

		return objects;

	}

	function getSphere() {

		return new Mesh( new SphereGeometry( 1, 100, 100 ) );

	}

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Raycaster', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "linePrecision", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var origin = new Vector3( 0, 0, 0 );
				var direction = new Vector3( 0, 0, - 1 );
				var a = new Raycaster( origin.clone(), direction.clone() );

				assert.deepEqual( a.ray.origin, origin, "Origin is correct" );
				assert.deepEqual( a.ray.direction, direction, "Direction is correct" );

				origin.set( 1, 1, 1 );
				direction.set( - 1, 0, 0 );
				a.set( origin, direction );

				assert.deepEqual( a.ray.origin, origin, "Origin was set correctly" );
				assert.deepEqual( a.ray.direction, direction, "Direction was set correctly" );

			} );

			QUnit.test( "setFromCamera (Perspective)", ( assert ) => {

				var raycaster = new Raycaster();
				var rayDirection = raycaster.ray.direction;
				var camera = new PerspectiveCamera( 90, 1, 1, 1000 );

				raycaster.setFromCamera( {
					x: 0,
					y: 0
				}, camera );
				assert.ok( rayDirection.x === 0, rayDirection.y === 0, rayDirection.z === - 1,
					"camera is looking straight to -z and so does the ray in the middle of the screen" );

				var step = 0.1;

				for ( var x = - 1; x <= 1; x += step ) {

					for ( var y = - 1; y <= 1; y += step ) {

						raycaster.setFromCamera( {
							x,
							y
						}, camera );

						var refVector = new Vector3( x, y, - 1 ).normalize();

						checkRayDirectionAgainstReferenceVector( rayDirection, refVector, assert );

					}

				}

			} );

			QUnit.test( "setFromCamera (Orthographic)", ( assert ) => {

				var raycaster = new Raycaster();
				var rayOrigin = raycaster.ray.origin;
				var rayDirection = raycaster.ray.direction;
				var camera = new OrthographicCamera( - 1, 1, 1, - 1, 0, 1000 );
				var expectedOrigin = new Vector3( 0, 0, 0 );
				var expectedDirection = new Vector3( 0, 0, - 1 );

				raycaster.setFromCamera( {
					x: 0,
					y: 0
				}, camera );
				assert.deepEqual( rayOrigin, expectedOrigin, "Ray origin has the right coordinates" );
				assert.deepEqual( rayDirection, expectedDirection, "Camera and Ray are pointing towards -z" );

			} );

			QUnit.test( "intersectObject", ( assert ) => {

				var raycaster = getRaycaster();
				var objectsToCheck = getObjectsToCheck();

				assert.ok( raycaster.intersectObject( objectsToCheck[ 0 ] ).length === 1,
					"no recursive search should lead to one hit" );

				assert.ok( raycaster.intersectObject( objectsToCheck[ 0 ], true ).length === 3,
					"recursive search should lead to three hits" );

				var intersections = raycaster.intersectObject( objectsToCheck[ 0 ], true );
				for ( var i = 0; i < intersections.length - 1; i ++ ) {

					assert.ok( intersections[ i ].distance <= intersections[ i + 1 ].distance, "intersections are sorted" );

				}

			} );

			QUnit.test( "intersectObjects", ( assert ) => {

				var raycaster = getRaycaster();
				var objectsToCheck = getObjectsToCheck();

				assert.ok( raycaster.intersectObjects( objectsToCheck ).length === 1,
					"no recursive search should lead to one hit" );

				assert.ok( raycaster.intersectObjects( objectsToCheck, true ).length === 3,
					"recursive search should lead to three hits" );

				var intersections = raycaster.intersectObjects( objectsToCheck, true );
				for ( var i = 0; i < intersections.length - 1; i ++ ) {

					assert.ok( intersections[ i ].distance <= intersections[ i + 1 ].distance, "intersections are sorted" );

				}

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Uniform( value ) {

		if ( typeof value === 'string' ) {

			console.warn( 'THREE.Uniform: Type parameter is no longer needed.' );
			value = arguments[ 1 ];

		}

		this.value = value;

	}

	Uniform.prototype.clone = function () {

		return new Uniform( this.value.clone === undefined ? this.value : this.value.clone() );

	};

	/**
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Core', () => {

		QUnit.module.todo( 'Uniform', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a;
				var b = new Vector3( x, y, z );

				a = new Uniform( 5 );
				assert.strictEqual( a.value, 5, "New constructor works with simple values" );

				a = new Uniform( b );
				assert.ok( a.value.equals( b ), "New constructor works with complex values" );

			} );

			// PUBLIC STUFF
			QUnit.test( "clone", ( assert ) => {

				var a = new Uniform( 23 );
				var b = a.clone();

				assert.strictEqual( b.value, a.value, "clone() with simple values works" );

				var a = new Uniform( new Vector3( 1, 2, 3 ) );
				var b = a.clone();

				assert.ok( b.value.equals( a.value ), "clone() with complex values works" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Group() {

		Object3D.call( this );

		this.type = 'Group';

	}

	Group.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Group

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module.todo( 'Extras', () => {

		QUnit.module.todo( 'SceneUtils', () => {

			// PUBLIC STUFF
			QUnit.test( "createMultiMaterialObject", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "detach", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "attach", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 */

	var ShapeUtils = {

		// calculate area of the contour polygon

		area: function ( contour ) {

			var n = contour.length;
			var a = 0.0;

			for ( var p = n - 1, q = 0; q < n; p = q ++ ) {

				a += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;

			}

			return a * 0.5;

		},

		triangulate: ( function () {

			/**
			 * This code is a quick port of code written in C++ which was submitted to
			 * flipcode.com by John W. Ratcliff  // July 22, 2000
			 * See original code and more information here:
			 * http://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml
			 *
			 * ported to actionscript by Zevan Rosser
			 * www.actionsnippet.com
			 *
			 * ported to javascript by Joshua Koo
			 * http://www.lab4games.net/zz85/blog
			 *
			 */

			function snip( contour, u, v, w, n, verts ) {

				var p;
				var ax, ay, bx, by;
				var cx, cy, px, py;

				ax = contour[ verts[ u ] ].x;
				ay = contour[ verts[ u ] ].y;

				bx = contour[ verts[ v ] ].x;
				by = contour[ verts[ v ] ].y;

				cx = contour[ verts[ w ] ].x;
				cy = contour[ verts[ w ] ].y;

				if ( ( bx - ax ) * ( cy - ay ) - ( by - ay ) * ( cx - ax ) <= 0 ) return false;

				var aX, aY, bX, bY, cX, cY;
				var apx, apy, bpx, bpy, cpx, cpy;
				var cCROSSap, bCROSScp, aCROSSbp;

				aX = cx - bx; aY = cy - by;
				bX = ax - cx; bY = ay - cy;
				cX = bx - ax; cY = by - ay;

				for ( p = 0; p < n; p ++ ) {

					px = contour[ verts[ p ] ].x;
					py = contour[ verts[ p ] ].y;

					if ( ( ( px === ax ) && ( py === ay ) ) ||
						 ( ( px === bx ) && ( py === by ) ) ||
						 ( ( px === cx ) && ( py === cy ) ) )	continue;

					apx = px - ax; apy = py - ay;
					bpx = px - bx; bpy = py - by;
					cpx = px - cx; cpy = py - cy;

					// see if p is inside triangle abc

					aCROSSbp = aX * bpy - aY * bpx;
					cCROSSap = cX * apy - cY * apx;
					bCROSScp = bX * cpy - bY * cpx;

					if ( ( aCROSSbp >= - Number.EPSILON ) && ( bCROSScp >= - Number.EPSILON ) && ( cCROSSap >= - Number.EPSILON ) ) return false;

				}

				return true;

			}

			// takes in an contour array and returns

			return function triangulate( contour, indices ) {

				var n = contour.length;

				if ( n < 3 ) return null;

				var result = [],
					verts = [],
					vertIndices = [];

				/* we want a counter-clockwise polygon in verts */

				var u, v, w;

				if ( ShapeUtils.area( contour ) > 0.0 ) {

					for ( v = 0; v < n; v ++ ) verts[ v ] = v;

				} else {

					for ( v = 0; v < n; v ++ ) verts[ v ] = ( n - 1 ) - v;

				}

				var nv = n;

				/*  remove nv - 2 vertices, creating 1 triangle every time */

				var count = 2 * nv; /* error detection */

				for ( v = nv - 1; nv > 2; ) {

					/* if we loop, it is probably a non-simple polygon */

					if ( ( count -- ) <= 0 ) {

						//** Triangulate: ERROR - probable bad polygon!

						//throw ( "Warning, unable to triangulate polygon!" );
						//return null;
						// Sometimes warning is fine, especially polygons are triangulated in reverse.
						console.warn( 'THREE.ShapeUtils: Unable to triangulate polygon! in triangulate()' );

						if ( indices ) return vertIndices;
						return result;

					}

					/* three consecutive vertices in current polygon, <u,v,w> */

					u = v; if ( nv <= u ) u = 0; /* previous */
					v = u + 1; if ( nv <= v ) v = 0; /* new v    */
					w = v + 1; if ( nv <= w ) w = 0; /* next     */

					if ( snip( contour, u, v, w, nv, verts ) ) {

						var a, b, c, s, t;

						/* true names of the vertices */

						a = verts[ u ];
						b = verts[ v ];
						c = verts[ w ];

						/* output Triangle */

						result.push( [ contour[ a ],
							contour[ b ],
							contour[ c ] ] );


						vertIndices.push( [ verts[ u ], verts[ v ], verts[ w ] ] );

						/* remove v from the remaining polygon */

						for ( s = v, t = v + 1; t < nv; s ++, t ++ ) {

							verts[ s ] = verts[ t ];

						}

						nv --;

						/* reset error detection counter */

						count = 2 * nv;

					}

				}

				if ( indices ) return vertIndices;
				return result;

			};

		} )(),

		triangulateShape: function ( contour, holes ) {

			function removeDupEndPts( points ) {

				var l = points.length;

				if ( l > 2 && points[ l - 1 ].equals( points[ 0 ] ) ) {

					points.pop();

				}

			}

			removeDupEndPts( contour );
			holes.forEach( removeDupEndPts );

			function point_in_segment_2D_colin( inSegPt1, inSegPt2, inOtherPt ) {

				// inOtherPt needs to be collinear to the inSegment
				if ( inSegPt1.x !== inSegPt2.x ) {

					if ( inSegPt1.x < inSegPt2.x ) {

						return	( ( inSegPt1.x <= inOtherPt.x ) && ( inOtherPt.x <= inSegPt2.x ) );

					} else {

						return	( ( inSegPt2.x <= inOtherPt.x ) && ( inOtherPt.x <= inSegPt1.x ) );

					}

				} else {

					if ( inSegPt1.y < inSegPt2.y ) {

						return	( ( inSegPt1.y <= inOtherPt.y ) && ( inOtherPt.y <= inSegPt2.y ) );

					} else {

						return	( ( inSegPt2.y <= inOtherPt.y ) && ( inOtherPt.y <= inSegPt1.y ) );

					}

				}

			}

			function intersect_segments_2D( inSeg1Pt1, inSeg1Pt2, inSeg2Pt1, inSeg2Pt2, inExcludeAdjacentSegs ) {

				var seg1dx = inSeg1Pt2.x - inSeg1Pt1.x, seg1dy = inSeg1Pt2.y - inSeg1Pt1.y;
				var seg2dx = inSeg2Pt2.x - inSeg2Pt1.x, seg2dy = inSeg2Pt2.y - inSeg2Pt1.y;

				var seg1seg2dx = inSeg1Pt1.x - inSeg2Pt1.x;
				var seg1seg2dy = inSeg1Pt1.y - inSeg2Pt1.y;

				var limit		= seg1dy * seg2dx - seg1dx * seg2dy;
				var perpSeg1	= seg1dy * seg1seg2dx - seg1dx * seg1seg2dy;

				if ( Math.abs( limit ) > Number.EPSILON ) {

					// not parallel

					var perpSeg2;
					if ( limit > 0 ) {

						if ( ( perpSeg1 < 0 ) || ( perpSeg1 > limit ) ) 		return [];
						perpSeg2 = seg2dy * seg1seg2dx - seg2dx * seg1seg2dy;
						if ( ( perpSeg2 < 0 ) || ( perpSeg2 > limit ) ) 		return [];

					} else {

						if ( ( perpSeg1 > 0 ) || ( perpSeg1 < limit ) ) 		return [];
						perpSeg2 = seg2dy * seg1seg2dx - seg2dx * seg1seg2dy;
						if ( ( perpSeg2 > 0 ) || ( perpSeg2 < limit ) ) 		return [];

					}

					// i.e. to reduce rounding errors
					// intersection at endpoint of segment#1?
					if ( perpSeg2 === 0 ) {

						if ( ( inExcludeAdjacentSegs ) &&
							 ( ( perpSeg1 === 0 ) || ( perpSeg1 === limit ) ) )		return [];
						return [ inSeg1Pt1 ];

					}
					if ( perpSeg2 === limit ) {

						if ( ( inExcludeAdjacentSegs ) &&
							 ( ( perpSeg1 === 0 ) || ( perpSeg1 === limit ) ) )		return [];
						return [ inSeg1Pt2 ];

					}
					// intersection at endpoint of segment#2?
					if ( perpSeg1 === 0 )		return [ inSeg2Pt1 ];
					if ( perpSeg1 === limit )	return [ inSeg2Pt2 ];

					// return real intersection point
					var factorSeg1 = perpSeg2 / limit;
					return	[ { x: inSeg1Pt1.x + factorSeg1 * seg1dx, y: inSeg1Pt1.y + factorSeg1 * seg1dy } ];

				} else {

					// parallel or collinear
					if ( ( perpSeg1 !== 0 ) ||
						 ( seg2dy * seg1seg2dx !== seg2dx * seg1seg2dy ) ) 			return [];

					// they are collinear or degenerate
					var seg1Pt = ( ( seg1dx === 0 ) && ( seg1dy === 0 ) );	// segment1 is just a point?
					var seg2Pt = ( ( seg2dx === 0 ) && ( seg2dy === 0 ) );	// segment2 is just a point?
					// both segments are points
					if ( seg1Pt && seg2Pt ) {

						if ( ( inSeg1Pt1.x !== inSeg2Pt1.x ) ||
							 ( inSeg1Pt1.y !== inSeg2Pt1.y ) )		return [];	// they are distinct  points
						return [ inSeg1Pt1 ];	// they are the same point

					}
					// segment#1  is a single point
					if ( seg1Pt ) {

						if ( ! point_in_segment_2D_colin( inSeg2Pt1, inSeg2Pt2, inSeg1Pt1 ) )		return [];		// but not in segment#2
						return [ inSeg1Pt1 ];

					}
					// segment#2  is a single point
					if ( seg2Pt ) {

						if ( ! point_in_segment_2D_colin( inSeg1Pt1, inSeg1Pt2, inSeg2Pt1 ) )		return [];		// but not in segment#1
						return [ inSeg2Pt1 ];

					}

					// they are collinear segments, which might overlap
					var seg1min, seg1max, seg1minVal, seg1maxVal;
					var seg2min, seg2max, seg2minVal, seg2maxVal;
					if ( seg1dx !== 0 ) {

						// the segments are NOT on a vertical line
						if ( inSeg1Pt1.x < inSeg1Pt2.x ) {

							seg1min = inSeg1Pt1; seg1minVal = inSeg1Pt1.x;
							seg1max = inSeg1Pt2; seg1maxVal = inSeg1Pt2.x;

						} else {

							seg1min = inSeg1Pt2; seg1minVal = inSeg1Pt2.x;
							seg1max = inSeg1Pt1; seg1maxVal = inSeg1Pt1.x;

						}
						if ( inSeg2Pt1.x < inSeg2Pt2.x ) {

							seg2min = inSeg2Pt1; seg2minVal = inSeg2Pt1.x;
							seg2max = inSeg2Pt2; seg2maxVal = inSeg2Pt2.x;

						} else {

							seg2min = inSeg2Pt2; seg2minVal = inSeg2Pt2.x;
							seg2max = inSeg2Pt1; seg2maxVal = inSeg2Pt1.x;

						}

					} else {

						// the segments are on a vertical line
						if ( inSeg1Pt1.y < inSeg1Pt2.y ) {

							seg1min = inSeg1Pt1; seg1minVal = inSeg1Pt1.y;
							seg1max = inSeg1Pt2; seg1maxVal = inSeg1Pt2.y;

						} else {

							seg1min = inSeg1Pt2; seg1minVal = inSeg1Pt2.y;
							seg1max = inSeg1Pt1; seg1maxVal = inSeg1Pt1.y;

						}
						if ( inSeg2Pt1.y < inSeg2Pt2.y ) {

							seg2min = inSeg2Pt1; seg2minVal = inSeg2Pt1.y;
							seg2max = inSeg2Pt2; seg2maxVal = inSeg2Pt2.y;

						} else {

							seg2min = inSeg2Pt2; seg2minVal = inSeg2Pt2.y;
							seg2max = inSeg2Pt1; seg2maxVal = inSeg2Pt1.y;

						}

					}
					if ( seg1minVal <= seg2minVal ) {

						if ( seg1maxVal < seg2minVal )	return [];
						if ( seg1maxVal === seg2minVal )	{

							if ( inExcludeAdjacentSegs )		return [];
							return [ seg2min ];

						}
						if ( seg1maxVal <= seg2maxVal )	return [ seg2min, seg1max ];
						return	[ seg2min, seg2max ];

					} else {

						if ( seg1minVal > seg2maxVal )	return [];
						if ( seg1minVal === seg2maxVal )	{

							if ( inExcludeAdjacentSegs )		return [];
							return [ seg1min ];

						}
						if ( seg1maxVal <= seg2maxVal )	return [ seg1min, seg1max ];
						return	[ seg1min, seg2max ];

					}

				}

			}

			function isPointInsideAngle( inVertex, inLegFromPt, inLegToPt, inOtherPt ) {

				// The order of legs is important

				// translation of all points, so that Vertex is at (0,0)
				var legFromPtX	= inLegFromPt.x - inVertex.x, legFromPtY = inLegFromPt.y - inVertex.y;
				var legToPtX	= inLegToPt.x	- inVertex.x, legToPtY = inLegToPt.y	- inVertex.y;
				var otherPtX	= inOtherPt.x	- inVertex.x, otherPtY = inOtherPt.y	- inVertex.y;

				// main angle >0: < 180 deg.; 0: 180 deg.; <0: > 180 deg.
				var from2toAngle	= legFromPtX * legToPtY - legFromPtY * legToPtX;
				var from2otherAngle	= legFromPtX * otherPtY - legFromPtY * otherPtX;

				if ( Math.abs( from2toAngle ) > Number.EPSILON ) {

					// angle != 180 deg.

					var other2toAngle		= otherPtX * legToPtY - otherPtY * legToPtX;
					// console.log( "from2to: " + from2toAngle + ", from2other: " + from2otherAngle + ", other2to: " + other2toAngle );

					if ( from2toAngle > 0 ) {

						// main angle < 180 deg.
						return	( ( from2otherAngle >= 0 ) && ( other2toAngle >= 0 ) );

					} else {

						// main angle > 180 deg.
						return	( ( from2otherAngle >= 0 ) || ( other2toAngle >= 0 ) );

					}

				} else {

					// angle == 180 deg.
					// console.log( "from2to: 180 deg., from2other: " + from2otherAngle  );
					return	( from2otherAngle > 0 );

				}

			}


			function removeHoles( contour, holes ) {

				var shape = contour.concat(); // work on this shape
				var hole;

				function isCutLineInsideAngles( inShapeIdx, inHoleIdx ) {

					// Check if hole point lies within angle around shape point
					var lastShapeIdx = shape.length - 1;

					var prevShapeIdx = inShapeIdx - 1;
					if ( prevShapeIdx < 0 )			prevShapeIdx = lastShapeIdx;

					var nextShapeIdx = inShapeIdx + 1;
					if ( nextShapeIdx > lastShapeIdx )	nextShapeIdx = 0;

					var insideAngle = isPointInsideAngle( shape[ inShapeIdx ], shape[ prevShapeIdx ], shape[ nextShapeIdx ], hole[ inHoleIdx ] );
					if ( ! insideAngle ) {

						// console.log( "Vertex (Shape): " + inShapeIdx + ", Point: " + hole[inHoleIdx].x + "/" + hole[inHoleIdx].y );
						return	false;

					}

					// Check if shape point lies within angle around hole point
					var lastHoleIdx = hole.length - 1;

					var prevHoleIdx = inHoleIdx - 1;
					if ( prevHoleIdx < 0 )			prevHoleIdx = lastHoleIdx;

					var nextHoleIdx = inHoleIdx + 1;
					if ( nextHoleIdx > lastHoleIdx )	nextHoleIdx = 0;

					insideAngle = isPointInsideAngle( hole[ inHoleIdx ], hole[ prevHoleIdx ], hole[ nextHoleIdx ], shape[ inShapeIdx ] );
					if ( ! insideAngle ) {

						// console.log( "Vertex (Hole): " + inHoleIdx + ", Point: " + shape[inShapeIdx].x + "/" + shape[inShapeIdx].y );
						return	false;

					}

					return	true;

				}

				function intersectsShapeEdge( inShapePt, inHolePt ) {

					// checks for intersections with shape edges
					var sIdx, nextIdx, intersection;
					for ( sIdx = 0; sIdx < shape.length; sIdx ++ ) {

						nextIdx = sIdx + 1; nextIdx %= shape.length;
						intersection = intersect_segments_2D( inShapePt, inHolePt, shape[ sIdx ], shape[ nextIdx ], true );
						if ( intersection.length > 0 )		return	true;

					}

					return	false;

				}

				var indepHoles = [];

				function intersectsHoleEdge( inShapePt, inHolePt ) {

					// checks for intersections with hole edges
					var ihIdx, chkHole,
						hIdx, nextIdx, intersection;
					for ( ihIdx = 0; ihIdx < indepHoles.length; ihIdx ++ ) {

						chkHole = holes[ indepHoles[ ihIdx ] ];
						for ( hIdx = 0; hIdx < chkHole.length; hIdx ++ ) {

							nextIdx = hIdx + 1; nextIdx %= chkHole.length;
							intersection = intersect_segments_2D( inShapePt, inHolePt, chkHole[ hIdx ], chkHole[ nextIdx ], true );
							if ( intersection.length > 0 )		return	true;

						}

					}
					return	false;

				}

				var holeIndex, shapeIndex,
					shapePt, holePt,
					holeIdx, cutKey, failedCuts = [],
					tmpShape1, tmpShape2,
					tmpHole1, tmpHole2;

				for ( var h = 0, hl = holes.length; h < hl; h ++ ) {

					indepHoles.push( h );

				}

				var minShapeIndex = 0;
				var counter = indepHoles.length * 2;
				while ( indepHoles.length > 0 ) {

					counter --;
					if ( counter < 0 ) {

						console.log( 'THREE.ShapeUtils: Infinite Loop! Holes left:" + indepHoles.length + ", Probably Hole outside Shape!' );
						break;

					}

					// search for shape-vertex and hole-vertex,
					// which can be connected without intersections
					for ( shapeIndex = minShapeIndex; shapeIndex < shape.length; shapeIndex ++ ) {

						shapePt = shape[ shapeIndex ];
						holeIndex	= - 1;

						// search for hole which can be reached without intersections
						for ( var h = 0; h < indepHoles.length; h ++ ) {

							holeIdx = indepHoles[ h ];

							// prevent multiple checks
							cutKey = shapePt.x + ':' + shapePt.y + ':' + holeIdx;
							if ( failedCuts[ cutKey ] !== undefined )			continue;

							hole = holes[ holeIdx ];
							for ( var h2 = 0; h2 < hole.length; h2 ++ ) {

								holePt = hole[ h2 ];
								if ( ! isCutLineInsideAngles( shapeIndex, h2 ) )		continue;
								if ( intersectsShapeEdge( shapePt, holePt ) )		continue;
								if ( intersectsHoleEdge( shapePt, holePt ) )		continue;

								holeIndex = h2;
								indepHoles.splice( h, 1 );

								tmpShape1 = shape.slice( 0, shapeIndex + 1 );
								tmpShape2 = shape.slice( shapeIndex );
								tmpHole1 = hole.slice( holeIndex );
								tmpHole2 = hole.slice( 0, holeIndex + 1 );

								shape = tmpShape1.concat( tmpHole1 ).concat( tmpHole2 ).concat( tmpShape2 );

								minShapeIndex = shapeIndex;

								// Debug only, to show the selected cuts
								// glob_CutLines.push( [ shapePt, holePt ] );

								break;

							}
							if ( holeIndex >= 0 )	break;		// hole-vertex found

							failedCuts[ cutKey ] = true;			// remember failure

						}
						if ( holeIndex >= 0 )	break;		// hole-vertex found

					}

				}

				return shape; 			/* shape with no holes */

			}


			var i, il, f, face,
				key, index,
				allPointsMap = {};

			// To maintain reference to old shape, one must match coordinates, or offset the indices from original arrays. It's probably easier to do the first.

			var allpoints = contour.concat();

			for ( var h = 0, hl = holes.length; h < hl; h ++ ) {

				Array.prototype.push.apply( allpoints, holes[ h ] );

			}

			//console.log( "allpoints",allpoints, allpoints.length );

			// prepare all points map

			for ( i = 0, il = allpoints.length; i < il; i ++ ) {

				key = allpoints[ i ].x + ':' + allpoints[ i ].y;

				if ( allPointsMap[ key ] !== undefined ) {

					console.warn( 'THREE.ShapeUtils: Duplicate point', key, i );

				}

				allPointsMap[ key ] = i;

			}

			// remove holes by cutting paths to holes and adding them to the shape
			var shapeWithoutHoles = removeHoles( contour, holes );

			var triangles = ShapeUtils.triangulate( shapeWithoutHoles, false ); // True returns indices for points of spooled shape
			//console.log( "triangles",triangles, triangles.length );

			// check all face vertices against all points map

			for ( i = 0, il = triangles.length; i < il; i ++ ) {

				face = triangles[ i ];

				for ( f = 0; f < 3; f ++ ) {

					key = face[ f ].x + ':' + face[ f ].y;

					index = allPointsMap[ key ];

					if ( index !== undefined ) {

						face[ f ] = index;

					}

				}

			}

			return triangles.concat();

		},

		isClockWise: function ( pts ) {

			return ShapeUtils.area( pts ) < 0;

		}

	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module.todo( 'ShapeUtils', () => {

			// PUBLIC STUFF
			QUnit.test( "area", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "triangulate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "triangulateShape", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "isClockWise", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * Extensible curve object
	 *
	 * Some common of curve methods:
	 * .getPoint( t, optionalTarget ), .getTangent( t )
	 * .getPointAt( u, optionalTarget ), .getTangentAt( u )
	 * .getPoints(), .getSpacedPoints()
	 * .getLength()
	 * .updateArcLengths()
	 *
	 * This following curves inherit from THREE.Curve:
	 *
	 * -- 2D curves --
	 * THREE.ArcCurve
	 * THREE.CubicBezierCurve
	 * THREE.EllipseCurve
	 * THREE.LineCurve
	 * THREE.QuadraticBezierCurve
	 * THREE.SplineCurve
	 *
	 * -- 3D curves --
	 * THREE.CatmullRomCurve3
	 * THREE.CubicBezierCurve3
	 * THREE.LineCurve3
	 * THREE.QuadraticBezierCurve3
	 *
	 * A series of curves can be represented as a THREE.CurvePath.
	 *
	 **/

	/**************************************************************
	 *	Abstract Curve base class
	 **************************************************************/

	function Curve() {

		this.type = 'Curve';

		this.arcLengthDivisions = 200;

	}

	Object.assign( Curve.prototype, {

		// Virtual base class method to overwrite and implement in subclasses
		//	- t [0 .. 1]

		getPoint: function ( /* t, optionalTarget */ ) {

			console.warn( 'THREE.Curve: .getPoint() not implemented.' );
			return null;

		},

		// Get point at relative position in curve according to arc length
		// - u [0 .. 1]

		getPointAt: function ( u, optionalTarget ) {

			var t = this.getUtoTmapping( u );
			return this.getPoint( t, optionalTarget );

		},

		// Get sequence of points using getPoint( t )

		getPoints: function ( divisions ) {

			if ( divisions === undefined ) divisions = 5;

			var points = [];

			for ( var d = 0; d <= divisions; d ++ ) {

				points.push( this.getPoint( d / divisions ) );

			}

			return points;

		},

		// Get sequence of points using getPointAt( u )

		getSpacedPoints: function ( divisions ) {

			if ( divisions === undefined ) divisions = 5;

			var points = [];

			for ( var d = 0; d <= divisions; d ++ ) {

				points.push( this.getPointAt( d / divisions ) );

			}

			return points;

		},

		// Get total curve arc length

		getLength: function () {

			var lengths = this.getLengths();
			return lengths[ lengths.length - 1 ];

		},

		// Get list of cumulative segment lengths

		getLengths: function ( divisions ) {

			if ( divisions === undefined ) divisions = this.arcLengthDivisions;

			if ( this.cacheArcLengths &&
				( this.cacheArcLengths.length === divisions + 1 ) &&
				! this.needsUpdate ) {

				return this.cacheArcLengths;

			}

			this.needsUpdate = false;

			var cache = [];
			var current, last = this.getPoint( 0 );
			var p, sum = 0;

			cache.push( 0 );

			for ( p = 1; p <= divisions; p ++ ) {

				current = this.getPoint( p / divisions );
				sum += current.distanceTo( last );
				cache.push( sum );
				last = current;

			}

			this.cacheArcLengths = cache;

			return cache; // { sums: cache, sum: sum }; Sum is in the last element.

		},

		updateArcLengths: function () {

			this.needsUpdate = true;
			this.getLengths();

		},

		// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant

		getUtoTmapping: function ( u, distance ) {

			var arcLengths = this.getLengths();

			var i = 0, il = arcLengths.length;

			var targetArcLength; // The targeted u distance value to get

			if ( distance ) {

				targetArcLength = distance;

			} else {

				targetArcLength = u * arcLengths[ il - 1 ];

			}

			// binary search for the index with largest value smaller than target u distance

			var low = 0, high = il - 1, comparison;

			while ( low <= high ) {

				i = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats

				comparison = arcLengths[ i ] - targetArcLength;

				if ( comparison < 0 ) {

					low = i + 1;

				} else if ( comparison > 0 ) {

					high = i - 1;

				} else {

					high = i;
					break;

					// DONE

				}

			}

			i = high;

			if ( arcLengths[ i ] === targetArcLength ) {

				return i / ( il - 1 );

			}

			// we could get finer grain at lengths, or use simple interpolation between two points

			var lengthBefore = arcLengths[ i ];
			var lengthAfter = arcLengths[ i + 1 ];

			var segmentLength = lengthAfter - lengthBefore;

			// determine where we are between the 'before' and 'after' points

			var segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;

			// add that fractional amount to t

			var t = ( i + segmentFraction ) / ( il - 1 );

			return t;

		},

		// Returns a unit vector tangent at t
		// In case any sub curve does not implement its tangent derivation,
		// 2 points a small delta apart will be used to find its gradient
		// which seems to give a reasonable approximation

		getTangent: function ( t ) {

			var delta = 0.0001;
			var t1 = t - delta;
			var t2 = t + delta;

			// Capping in case of danger

			if ( t1 < 0 ) t1 = 0;
			if ( t2 > 1 ) t2 = 1;

			var pt1 = this.getPoint( t1 );
			var pt2 = this.getPoint( t2 );

			var vec = pt2.clone().sub( pt1 );
			return vec.normalize();

		},

		getTangentAt: function ( u ) {

			var t = this.getUtoTmapping( u );
			return this.getTangent( t );

		},

		computeFrenetFrames: function ( segments, closed ) {

			// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf

			var normal = new Vector3();

			var tangents = [];
			var normals = [];
			var binormals = [];

			var vec = new Vector3();
			var mat = new Matrix4();

			var i, u, theta;

			// compute the tangent vectors for each segment on the curve

			for ( i = 0; i <= segments; i ++ ) {

				u = i / segments;

				tangents[ i ] = this.getTangentAt( u );
				tangents[ i ].normalize();

			}

			// select an initial normal vector perpendicular to the first tangent vector,
			// and in the direction of the minimum tangent xyz component

			normals[ 0 ] = new Vector3();
			binormals[ 0 ] = new Vector3();
			var min = Number.MAX_VALUE;
			var tx = Math.abs( tangents[ 0 ].x );
			var ty = Math.abs( tangents[ 0 ].y );
			var tz = Math.abs( tangents[ 0 ].z );

			if ( tx <= min ) {

				min = tx;
				normal.set( 1, 0, 0 );

			}

			if ( ty <= min ) {

				min = ty;
				normal.set( 0, 1, 0 );

			}

			if ( tz <= min ) {

				normal.set( 0, 0, 1 );

			}

			vec.crossVectors( tangents[ 0 ], normal ).normalize();

			normals[ 0 ].crossVectors( tangents[ 0 ], vec );
			binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );


			// compute the slowly-varying normal and binormal vectors for each segment on the curve

			for ( i = 1; i <= segments; i ++ ) {

				normals[ i ] = normals[ i - 1 ].clone();

				binormals[ i ] = binormals[ i - 1 ].clone();

				vec.crossVectors( tangents[ i - 1 ], tangents[ i ] );

				if ( vec.length() > Number.EPSILON ) {

					vec.normalize();

					theta = Math.acos( _Math.clamp( tangents[ i - 1 ].dot( tangents[ i ] ), - 1, 1 ) ); // clamp for floating pt errors

					normals[ i ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );

				}

				binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );

			}

			// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same

			if ( closed === true ) {

				theta = Math.acos( _Math.clamp( normals[ 0 ].dot( normals[ segments ] ), - 1, 1 ) );
				theta /= segments;

				if ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ segments ] ) ) > 0 ) {

					theta = - theta;

				}

				for ( i = 1; i <= segments; i ++ ) {

					// twist a little...
					normals[ i ].applyMatrix4( mat.makeRotationAxis( tangents[ i ], theta * i ) );
					binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );

				}

			}

			return {
				tangents: tangents,
				normals: normals,
				binormals: binormals
			};

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( source ) {

			this.arcLengthDivisions = source.arcLengthDivisions;

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'Curve', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getLength", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getLengths", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "updateArcLengths", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getTangent", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getTangentAt", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "computeFrenetFrames", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	function LineCurve( v1, v2 ) {

		Curve.call( this );

		this.type = 'LineCurve';

		this.v1 = v1 || new Vector2();
		this.v2 = v2 || new Vector2();

	}

	LineCurve.prototype = Object.create( Curve.prototype );
	LineCurve.prototype.constructor = LineCurve;

	LineCurve.prototype.isLineCurve = true;

	LineCurve.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector2();

		if ( t === 1 ) {

			point.copy( this.v2 );

		} else {

			point.copy( this.v2 ).sub( this.v1 );
			point.multiplyScalar( t ).add( this.v1 );

		}

		return point;

	};

	// Line curve is linear, so we can overwrite default getPointAt

	LineCurve.prototype.getPointAt = function ( u, optionalTarget ) {

		return this.getPoint( u, optionalTarget );

	};

	LineCurve.prototype.getTangent = function ( /* t */ ) {

		var tangent = this.v2.clone().sub( this.v1 );

		return tangent.normalize();

	};

	LineCurve.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );

		return this;

	};

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 *
	 **/

	/**************************************************************
	 *	Curved Path - a curve path is simply a array of connected
	 *  curves, but retains the api of a curve
	 **************************************************************/

	function CurvePath() {

		Curve.call( this );

		this.type = 'CurvePath';

		this.curves = [];
		this.autoClose = false; // Automatically closes the path

	}

	CurvePath.prototype = Object.assign( Object.create( Curve.prototype ), {

		constructor: CurvePath,

		add: function ( curve ) {

			this.curves.push( curve );

		},

		closePath: function () {

			// Add a line curve if start and end of lines are not connected
			var startPoint = this.curves[ 0 ].getPoint( 0 );
			var endPoint = this.curves[ this.curves.length - 1 ].getPoint( 1 );

			if ( ! startPoint.equals( endPoint ) ) {

				this.curves.push( new LineCurve( endPoint, startPoint ) );

			}

		},

		// To get accurate point with reference to
		// entire path distance at time t,
		// following has to be done:

		// 1. Length of each sub path have to be known
		// 2. Locate and identify type of curve
		// 3. Get t for the curve
		// 4. Return curve.getPointAt(t')

		getPoint: function ( t ) {

			var d = t * this.getLength();
			var curveLengths = this.getCurveLengths();
			var i = 0;

			// To think about boundaries points.

			while ( i < curveLengths.length ) {

				if ( curveLengths[ i ] >= d ) {

					var diff = curveLengths[ i ] - d;
					var curve = this.curves[ i ];

					var segmentLength = curve.getLength();
					var u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;

					return curve.getPointAt( u );

				}

				i ++;

			}

			return null;

			// loop where sum != 0, sum > d , sum+1 <d

		},

		// We cannot use the default THREE.Curve getPoint() with getLength() because in
		// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
		// getPoint() depends on getLength

		getLength: function () {

			var lens = this.getCurveLengths();
			return lens[ lens.length - 1 ];

		},

		// cacheLengths must be recalculated.
		updateArcLengths: function () {

			this.needsUpdate = true;
			this.cacheLengths = null;
			this.getCurveLengths();

		},

		// Compute lengths and cache them
		// We cannot overwrite getLengths() because UtoT mapping uses it.

		getCurveLengths: function () {

			// We use cache values if curves and cache array are same length

			if ( this.cacheLengths && this.cacheLengths.length === this.curves.length ) {

				return this.cacheLengths;

			}

			// Get length of sub-curve
			// Push sums into cached array

			var lengths = [], sums = 0;

			for ( var i = 0, l = this.curves.length; i < l; i ++ ) {

				sums += this.curves[ i ].getLength();
				lengths.push( sums );

			}

			this.cacheLengths = lengths;

			return lengths;

		},

		getSpacedPoints: function ( divisions ) {

			if ( divisions === undefined ) divisions = 40;

			var points = [];

			for ( var i = 0; i <= divisions; i ++ ) {

				points.push( this.getPoint( i / divisions ) );

			}

			if ( this.autoClose ) {

				points.push( points[ 0 ] );

			}

			return points;

		},

		getPoints: function ( divisions ) {

			divisions = divisions || 12;

			var points = [], last;

			for ( var i = 0, curves = this.curves; i < curves.length; i ++ ) {

				var curve = curves[ i ];
				var resolution = ( curve && curve.isEllipseCurve ) ? divisions * 2
					: ( curve && curve.isLineCurve ) ? 1
						: ( curve && curve.isSplineCurve ) ? divisions * curve.points.length
							: divisions;

				var pts = curve.getPoints( resolution );

				for ( var j = 0; j < pts.length; j ++ ) {

					var point = pts[ j ];

					if ( last && last.equals( point ) ) continue; // ensures no consecutive points are duplicates

					points.push( point );
					last = point;

				}

			}

			if ( this.autoClose && points.length > 1 && ! points[ points.length - 1 ].equals( points[ 0 ] ) ) {

				points.push( points[ 0 ] );

			}

			return points;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'CurvePath', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "add", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "closePath", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getLength", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "updateArcLengths", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getCurveLengths", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "createPointsGeometry", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "createSpacedPointsGeometry", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "createGeometry", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 *
	 * Bezier Curves formulas obtained from
	 * http://en.wikipedia.org/wiki/Bézier_curve
	 */

	function CatmullRom( t, p0, p1, p2, p3 ) {

		var v0 = ( p2 - p0 ) * 0.5;
		var v1 = ( p3 - p1 ) * 0.5;
		var t2 = t * t;
		var t3 = t * t2;
		return ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;

	}

	//

	function QuadraticBezierP0( t, p ) {

		var k = 1 - t;
		return k * k * p;

	}

	function QuadraticBezierP1( t, p ) {

		return 2 * ( 1 - t ) * t * p;

	}

	function QuadraticBezierP2( t, p ) {

		return t * t * p;

	}

	function QuadraticBezier( t, p0, p1, p2 ) {

		return QuadraticBezierP0( t, p0 ) + QuadraticBezierP1( t, p1 ) +
			QuadraticBezierP2( t, p2 );

	}

	//

	function CubicBezierP0( t, p ) {

		var k = 1 - t;
		return k * k * k * p;

	}

	function CubicBezierP1( t, p ) {

		var k = 1 - t;
		return 3 * k * k * t * p;

	}

	function CubicBezierP2( t, p ) {

		return 3 * ( 1 - t ) * t * t * p;

	}

	function CubicBezierP3( t, p ) {

		return t * t * t * p;

	}

	function CubicBezier( t, p0, p1, p2, p3 ) {

		return CubicBezierP0( t, p0 ) + CubicBezierP1( t, p1 ) + CubicBezierP2( t, p2 ) +
			CubicBezierP3( t, p3 );

	}

	function EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

		Curve.call( this );

		this.type = 'EllipseCurve';

		this.aX = aX || 0;
		this.aY = aY || 0;

		this.xRadius = xRadius || 1;
		this.yRadius = yRadius || 1;

		this.aStartAngle = aStartAngle || 0;
		this.aEndAngle = aEndAngle || 2 * Math.PI;

		this.aClockwise = aClockwise || false;

		this.aRotation = aRotation || 0;

	}

	EllipseCurve.prototype = Object.create( Curve.prototype );
	EllipseCurve.prototype.constructor = EllipseCurve;

	EllipseCurve.prototype.isEllipseCurve = true;

	EllipseCurve.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector2();

		var twoPi = Math.PI * 2;
		var deltaAngle = this.aEndAngle - this.aStartAngle;
		var samePoints = Math.abs( deltaAngle ) < Number.EPSILON;

		// ensures that deltaAngle is 0 .. 2 PI
		while ( deltaAngle < 0 ) deltaAngle += twoPi;
		while ( deltaAngle > twoPi ) deltaAngle -= twoPi;

		if ( deltaAngle < Number.EPSILON ) {

			if ( samePoints ) {

				deltaAngle = 0;

			} else {

				deltaAngle = twoPi;

			}

		}

		if ( this.aClockwise === true && ! samePoints ) {

			if ( deltaAngle === twoPi ) {

				deltaAngle = - twoPi;

			} else {

				deltaAngle = deltaAngle - twoPi;

			}

		}

		var angle = this.aStartAngle + t * deltaAngle;
		var x = this.aX + this.xRadius * Math.cos( angle );
		var y = this.aY + this.yRadius * Math.sin( angle );

		if ( this.aRotation !== 0 ) {

			var cos = Math.cos( this.aRotation );
			var sin = Math.sin( this.aRotation );

			var tx = x - this.aX;
			var ty = y - this.aY;

			// Rotate the point about the center of the ellipse.
			x = tx * cos - ty * sin + this.aX;
			y = tx * sin + ty * cos + this.aY;

		}

		return point.set( x, y );

	};

	EllipseCurve.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.aX = source.aX;
		this.aY = source.aY;

		this.xRadius = source.xRadius;
		this.yRadius = source.yRadius;

		this.aStartAngle = source.aStartAngle;
		this.aEndAngle = source.aEndAngle;

		this.aClockwise = source.aClockwise;

		this.aRotation = source.aRotation;

		return this;

	};

	function SplineCurve( points /* array of Vector2 */ ) {

		Curve.call( this );

		this.type = 'SplineCurve';

		this.points = points || [];

	}

	SplineCurve.prototype = Object.create( Curve.prototype );
	SplineCurve.prototype.constructor = SplineCurve;

	SplineCurve.prototype.isSplineCurve = true;

	SplineCurve.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector2();

		var points = this.points;
		var p = ( points.length - 1 ) * t;

		var intPoint = Math.floor( p );
		var weight = p - intPoint;

		var p0 = points[ intPoint === 0 ? intPoint : intPoint - 1 ];
		var p1 = points[ intPoint ];
		var p2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];
		var p3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];

		point.set(
			CatmullRom( weight, p0.x, p1.x, p2.x, p3.x ),
			CatmullRom( weight, p0.y, p1.y, p2.y, p3.y )
		);

		return point;

	};

	SplineCurve.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.points = [];

		for ( var i = 0, l = source.points.length; i < l; i ++ ) {

			var point = source.points[ i ];

			this.points.push( point.clone() );

		}

		return this;

	};

	function CubicBezierCurve( v0, v1, v2, v3 ) {

		Curve.call( this );

		this.type = 'CubicBezierCurve';

		this.v0 = v0 || new Vector2();
		this.v1 = v1 || new Vector2();
		this.v2 = v2 || new Vector2();
		this.v3 = v3 || new Vector2();

	}

	CubicBezierCurve.prototype = Object.create( Curve.prototype );
	CubicBezierCurve.prototype.constructor = CubicBezierCurve;

	CubicBezierCurve.prototype.isCubicBezierCurve = true;

	CubicBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector2();

		var v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;

		point.set(
			CubicBezier( t, v0.x, v1.x, v2.x, v3.x ),
			CubicBezier( t, v0.y, v1.y, v2.y, v3.y )
		);

		return point;

	};

	CubicBezierCurve.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
		this.v3.copy( source.v3 );

		return this;

	};

	function QuadraticBezierCurve( v0, v1, v2 ) {

		Curve.call( this );

		this.type = 'QuadraticBezierCurve';

		this.v0 = v0 || new Vector2();
		this.v1 = v1 || new Vector2();
		this.v2 = v2 || new Vector2();

	}

	QuadraticBezierCurve.prototype = Object.create( Curve.prototype );
	QuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;

	QuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;

	QuadraticBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector2();

		var v0 = this.v0, v1 = this.v1, v2 = this.v2;

		point.set(
			QuadraticBezier( t, v0.x, v1.x, v2.x ),
			QuadraticBezier( t, v0.y, v1.y, v2.y )
		);

		return point;

	};

	QuadraticBezierCurve.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );

		return this;

	};

	var PathPrototype = Object.assign( Object.create( CurvePath.prototype ), {

		fromPoints: function ( vectors ) {

			this.moveTo( vectors[ 0 ].x, vectors[ 0 ].y );

			for ( var i = 1, l = vectors.length; i < l; i ++ ) {

				this.lineTo( vectors[ i ].x, vectors[ i ].y );

			}

		},

		moveTo: function ( x, y ) {

			this.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?

		},

		lineTo: function ( x, y ) {

			var curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );
			this.curves.push( curve );

			this.currentPoint.set( x, y );

		},

		quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {

			var curve = new QuadraticBezierCurve(
				this.currentPoint.clone(),
				new Vector2( aCPx, aCPy ),
				new Vector2( aX, aY )
			);

			this.curves.push( curve );

			this.currentPoint.set( aX, aY );

		},

		bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {

			var curve = new CubicBezierCurve(
				this.currentPoint.clone(),
				new Vector2( aCP1x, aCP1y ),
				new Vector2( aCP2x, aCP2y ),
				new Vector2( aX, aY )
			);

			this.curves.push( curve );

			this.currentPoint.set( aX, aY );

		},

		splineThru: function ( pts /*Array of Vector*/ ) {

			var npts = [ this.currentPoint.clone() ].concat( pts );

			var curve = new SplineCurve( npts );
			this.curves.push( curve );

			this.currentPoint.copy( pts[ pts.length - 1 ] );

		},

		arc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

			var x0 = this.currentPoint.x;
			var y0 = this.currentPoint.y;

			this.absarc( aX + x0, aY + y0, aRadius,
				aStartAngle, aEndAngle, aClockwise );

		},

		absarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {

			this.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );

		},

		ellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

			var x0 = this.currentPoint.x;
			var y0 = this.currentPoint.y;

			this.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );

		},

		absellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {

			var curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );

			if ( this.curves.length > 0 ) {

				// if a previous curve is present, attempt to join
				var firstPoint = curve.getPoint( 0 );

				if ( ! firstPoint.equals( this.currentPoint ) ) {

					this.lineTo( firstPoint.x, firstPoint.y );

				}

			}

			this.curves.push( curve );

			var lastPoint = curve.getPoint( 1 );
			this.currentPoint.copy( lastPoint );

		}

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * Creates free form 2d path using series of points, lines or curves.
	 **/

	function Path( points ) {

		CurvePath.call( this );

		this.type = 'Path';

		this.currentPoint = new Vector2();

		if ( points ) {

			this.fromPoints( points );

		}

	}

	Path.prototype = PathPrototype;
	PathPrototype.constructor = Path;

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * Defines a 2d shape plane using paths.
	 **/

	// STEP 1 Create a path.
	// STEP 2 Turn path into shape.
	// STEP 3 ExtrudeGeometry takes in Shape/Shapes
	// STEP 3a - Extract points from each shape, turn to vertices
	// STEP 3b - Triangulate each shape, add faces.

	function Shape() {

		Path.apply( this, arguments );

		this.type = 'Shape';

		this.holes = [];

	}

	Shape.prototype = Object.assign( Object.create( PathPrototype ), {

		constructor: Shape,

		getPointsHoles: function ( divisions ) {

			var holesPts = [];

			for ( var i = 0, l = this.holes.length; i < l; i ++ ) {

				holesPts[ i ] = this.holes[ i ].getPoints( divisions );

			}

			return holesPts;

		},

		// Get points of shape and holes (keypoints based on segments parameter)

		extractAllPoints: function ( divisions ) {

			return {

				shape: this.getPoints( divisions ),
				holes: this.getPointsHoles( divisions )

			};

		},

		extractPoints: function ( divisions ) {

			return this.extractAllPoints( divisions );

		}

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * minimal class for proxing functions to Path. Replaces old "extractSubpaths()"
	 **/

	function ShapePath() {

		this.type = 'ShapePath';

		this.subPaths = [];
		this.currentPath = null;

	}

	Object.assign( ShapePath.prototype, {

		moveTo: function ( x, y ) {

			this.currentPath = new Path();
			this.subPaths.push( this.currentPath );
			this.currentPath.moveTo( x, y );

		},

		lineTo: function ( x, y ) {

			this.currentPath.lineTo( x, y );

		},

		quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {

			this.currentPath.quadraticCurveTo( aCPx, aCPy, aX, aY );

		},

		bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {

			this.currentPath.bezierCurveTo( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY );

		},

		splineThru: function ( pts ) {

			this.currentPath.splineThru( pts );

		},

		toShapes: function ( isCCW, noHoles ) {

			function toShapesNoHoles( inSubpaths ) {

				var shapes = [];

				for ( var i = 0, l = inSubpaths.length; i < l; i ++ ) {

					var tmpPath = inSubpaths[ i ];

					var tmpShape = new Shape();
					tmpShape.curves = tmpPath.curves;

					shapes.push( tmpShape );

				}

				return shapes;

			}

			function isPointInsidePolygon( inPt, inPolygon ) {

				var polyLen = inPolygon.length;

				// inPt on polygon contour => immediate success    or
				// toggling of inside/outside at every single! intersection point of an edge
				//  with the horizontal line through inPt, left of inPt
				//  not counting lowerY endpoints of edges and whole edges on that line
				var inside = false;
				for ( var p = polyLen - 1, q = 0; q < polyLen; p = q ++ ) {

					var edgeLowPt = inPolygon[ p ];
					var edgeHighPt = inPolygon[ q ];

					var edgeDx = edgeHighPt.x - edgeLowPt.x;
					var edgeDy = edgeHighPt.y - edgeLowPt.y;

					if ( Math.abs( edgeDy ) > Number.EPSILON ) {

						// not parallel
						if ( edgeDy < 0 ) {

							edgeLowPt = inPolygon[ q ]; edgeDx = - edgeDx;
							edgeHighPt = inPolygon[ p ]; edgeDy = - edgeDy;

						}
						if ( ( inPt.y < edgeLowPt.y ) || ( inPt.y > edgeHighPt.y ) ) 		continue;

						if ( inPt.y === edgeLowPt.y ) {

							if ( inPt.x === edgeLowPt.x )		return	true;		// inPt is on contour ?
							// continue;				// no intersection or edgeLowPt => doesn't count !!!

						} else {

							var perpEdge = edgeDy * ( inPt.x - edgeLowPt.x ) - edgeDx * ( inPt.y - edgeLowPt.y );
							if ( perpEdge === 0 )				return	true;		// inPt is on contour ?
							if ( perpEdge < 0 ) 				continue;
							inside = ! inside;		// true intersection left of inPt

						}

					} else {

						// parallel or collinear
						if ( inPt.y !== edgeLowPt.y ) 		continue;			// parallel
						// edge lies on the same horizontal line as inPt
						if ( ( ( edgeHighPt.x <= inPt.x ) && ( inPt.x <= edgeLowPt.x ) ) ||
							 ( ( edgeLowPt.x <= inPt.x ) && ( inPt.x <= edgeHighPt.x ) ) )		return	true;	// inPt: Point on contour !
						// continue;

					}

				}

				return	inside;

			}

			var isClockWise = ShapeUtils.isClockWise;

			var subPaths = this.subPaths;
			if ( subPaths.length === 0 ) return [];

			if ( noHoles === true )	return	toShapesNoHoles( subPaths );


			var solid, tmpPath, tmpShape, shapes = [];

			if ( subPaths.length === 1 ) {

				tmpPath = subPaths[ 0 ];
				tmpShape = new Shape();
				tmpShape.curves = tmpPath.curves;
				shapes.push( tmpShape );
				return shapes;

			}

			var holesFirst = ! isClockWise( subPaths[ 0 ].getPoints() );
			holesFirst = isCCW ? ! holesFirst : holesFirst;

			// console.log("Holes first", holesFirst);

			var betterShapeHoles = [];
			var newShapes = [];
			var newShapeHoles = [];
			var mainIdx = 0;
			var tmpPoints;

			newShapes[ mainIdx ] = undefined;
			newShapeHoles[ mainIdx ] = [];

			for ( var i = 0, l = subPaths.length; i < l; i ++ ) {

				tmpPath = subPaths[ i ];
				tmpPoints = tmpPath.getPoints();
				solid = isClockWise( tmpPoints );
				solid = isCCW ? ! solid : solid;

				if ( solid ) {

					if ( ( ! holesFirst ) && ( newShapes[ mainIdx ] ) )	mainIdx ++;

					newShapes[ mainIdx ] = { s: new Shape(), p: tmpPoints };
					newShapes[ mainIdx ].s.curves = tmpPath.curves;

					if ( holesFirst )	mainIdx ++;
					newShapeHoles[ mainIdx ] = [];

					//console.log('cw', i);

				} else {

					newShapeHoles[ mainIdx ].push( { h: tmpPath, p: tmpPoints[ 0 ] } );

					//console.log('ccw', i);

				}

			}

			// only Holes? -> probably all Shapes with wrong orientation
			if ( ! newShapes[ 0 ] )	return	toShapesNoHoles( subPaths );


			if ( newShapes.length > 1 ) {

				var ambiguous = false;
				var toChange = [];

				for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {

					betterShapeHoles[ sIdx ] = [];

				}

				for ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {

					var sho = newShapeHoles[ sIdx ];

					for ( var hIdx = 0; hIdx < sho.length; hIdx ++ ) {

						var ho = sho[ hIdx ];
						var hole_unassigned = true;

						for ( var s2Idx = 0; s2Idx < newShapes.length; s2Idx ++ ) {

							if ( isPointInsidePolygon( ho.p, newShapes[ s2Idx ].p ) ) {

								if ( sIdx !== s2Idx )	toChange.push( { froms: sIdx, tos: s2Idx, hole: hIdx } );
								if ( hole_unassigned ) {

									hole_unassigned = false;
									betterShapeHoles[ s2Idx ].push( ho );

								} else {

									ambiguous = true;

								}

							}

						}
						if ( hole_unassigned ) {

							betterShapeHoles[ sIdx ].push( ho );

						}

					}

				}
				// console.log("ambiguous: ", ambiguous);
				if ( toChange.length > 0 ) {

					// console.log("to change: ", toChange);
					if ( ! ambiguous )	newShapeHoles = betterShapeHoles;

				}

			}

			var tmpHoles;

			for ( var i = 0, il = newShapes.length; i < il; i ++ ) {

				tmpShape = newShapes[ i ].s;
				shapes.push( tmpShape );
				tmpHoles = newShapeHoles[ i ];

				for ( var j = 0, jl = tmpHoles.length; j < jl; j ++ ) {

					tmpShape.holes.push( tmpHoles[ j ].h );

				}

			}

			//console.log("shape", shapes);

			return shapes;

		}

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Font( data ) {

		this.type = 'Font';

		this.data = data;

	}

	Object.assign( Font.prototype, {

		isFont: true,

		generateShapes: function ( text, size, divisions ) {

			function createPaths( text ) {

				var chars = String( text ).split( '' );
				var scale = size / data.resolution;
				var line_height = ( data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness ) * scale;

				var offsetX = 0, offsetY = 0;

				var paths = [];

				for ( var i = 0; i < chars.length; i ++ ) {

					var char = chars[ i ];

					if ( char === '\n' ) {

						offsetX = 0;
						offsetY -= line_height;

					} else {

						var ret = createPath( char, scale, offsetX, offsetY );
						offsetX += ret.offsetX;
						paths.push( ret.path );

					}

				}

				return paths;

			}

			function createPath( c, scale, offsetX, offsetY ) {

				var glyph = data.glyphs[ c ] || data.glyphs[ '?' ];

				if ( ! glyph ) return;

				var path = new ShapePath();

				var pts = [];
				var x, y, cpx, cpy, cpx0, cpy0, cpx1, cpy1, cpx2, cpy2, laste;

				if ( glyph.o ) {

					var outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );

					for ( var i = 0, l = outline.length; i < l; ) {

						var action = outline[ i ++ ];

						switch ( action ) {

							case 'm': // moveTo

								x = outline[ i ++ ] * scale + offsetX;
								y = outline[ i ++ ] * scale + offsetY;

								path.moveTo( x, y );

								break;

							case 'l': // lineTo

								x = outline[ i ++ ] * scale + offsetX;
								y = outline[ i ++ ] * scale + offsetY;

								path.lineTo( x, y );

								break;

							case 'q': // quadraticCurveTo

								cpx = outline[ i ++ ] * scale + offsetX;
								cpy = outline[ i ++ ] * scale + offsetY;
								cpx1 = outline[ i ++ ] * scale + offsetX;
								cpy1 = outline[ i ++ ] * scale + offsetY;

								path.quadraticCurveTo( cpx1, cpy1, cpx, cpy );

								laste = pts[ pts.length - 1 ];

								if ( laste ) {

									cpx0 = laste.x;
									cpy0 = laste.y;

									for ( var i2 = 1; i2 <= divisions; i2 ++ ) {

										var t = i2 / divisions;
										QuadraticBezier( t, cpx0, cpx1, cpx );
										QuadraticBezier( t, cpy0, cpy1, cpy );

									}

								}

								break;

							case 'b': // bezierCurveTo

								cpx = outline[ i ++ ] * scale + offsetX;
								cpy = outline[ i ++ ] * scale + offsetY;
								cpx1 = outline[ i ++ ] * scale + offsetX;
								cpy1 = outline[ i ++ ] * scale + offsetY;
								cpx2 = outline[ i ++ ] * scale + offsetX;
								cpy2 = outline[ i ++ ] * scale + offsetY;

								path.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );

								laste = pts[ pts.length - 1 ];

								if ( laste ) {

									cpx0 = laste.x;
									cpy0 = laste.y;

									for ( var i2 = 1; i2 <= divisions; i2 ++ ) {

										var t = i2 / divisions;
										CubicBezier( t, cpx0, cpx1, cpx2, cpx );
										CubicBezier( t, cpy0, cpy1, cpy2, cpy );

									}

								}

								break;

						}

					}

				}

				return { offsetX: glyph.ha * scale, path: path };

			}

			//

			if ( size === undefined ) size = 100;
			if ( divisions === undefined ) divisions = 4;

			var data = this.data;

			var paths = createPaths( text );
			var shapes = [];

			for ( var p = 0, pl = paths.length; p < pl; p ++ ) {

				Array.prototype.push.apply( shapes, paths[ p ].toShapes() );

			}

			return shapes;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'Font', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isFont", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "generateShapes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'Interpolations', () => {

				// PUBLIC STUFF
				QUnit.test( "CatmullRom", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "QuadraticBezier", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "CubicBezier", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'Path', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'PathPrototype', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "fromPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "moveTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "lineTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "quadraticCurveTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "bezierCurveTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "splineThru", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "arc", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "absarc", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "ellipse", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "absellipse", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'Shape', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getPointsHoles", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "extractAllPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "extractPoints", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Core', () => {

			QUnit.module.todo( 'ShapePath', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "moveTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "lineTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "quadraticCurveTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "bezierCurveTo", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "splineThru", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "toShapes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'ArcCurve', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isArcCurve", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author zz85 https://github.com/zz85
	 *
	 * Centripetal CatmullRom Curve - which is useful for avoiding
	 * cusps and self-intersections in non-uniform catmull rom curves.
	 * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
	 *
	 * curve.type accepts centripetal(default), chordal and catmullrom
	 * curve.tension is used for catmullrom which defaults to 0.5
	 */


	/*
	Based on an optimized c++ solution in
	 - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/
	 - http://ideone.com/NoEbVM

	This CubicPoly class could be used for reusing some variables and calculations,
	but for three.js curve use, it could be possible inlined and flatten into a single function call
	which can be placed in CurveUtils.
	*/

	function CubicPoly() {

		var c0 = 0, c1 = 0, c2 = 0, c3 = 0;

		/*
		 * Compute coefficients for a cubic polynomial
		 *   p(s) = c0 + c1*s + c2*s^2 + c3*s^3
		 * such that
		 *   p(0) = x0, p(1) = x1
		 *  and
		 *   p'(0) = t0, p'(1) = t1.
		 */
		function init( x0, x1, t0, t1 ) {

			c0 = x0;
			c1 = t0;
			c2 = - 3 * x0 + 3 * x1 - 2 * t0 - t1;
			c3 = 2 * x0 - 2 * x1 + t0 + t1;

		}

		return {

			initCatmullRom: function ( x0, x1, x2, x3, tension ) {

				init( x1, x2, tension * ( x2 - x0 ), tension * ( x3 - x1 ) );

			},

			initNonuniformCatmullRom: function ( x0, x1, x2, x3, dt0, dt1, dt2 ) {

				// compute tangents when parameterized in [t1,t2]
				var t1 = ( x1 - x0 ) / dt0 - ( x2 - x0 ) / ( dt0 + dt1 ) + ( x2 - x1 ) / dt1;
				var t2 = ( x2 - x1 ) / dt1 - ( x3 - x1 ) / ( dt1 + dt2 ) + ( x3 - x2 ) / dt2;

				// rescale tangents for parametrization in [0,1]
				t1 *= dt1;
				t2 *= dt1;

				init( x1, x2, t1, t2 );

			},

			calc: function ( t ) {

				var t2 = t * t;
				var t3 = t2 * t;
				return c0 + c1 * t + c2 * t2 + c3 * t3;

			}

		};

	}

	//

	var tmp = new Vector3();
	var px = new CubicPoly();
	var py = new CubicPoly();
	var pz = new CubicPoly();

	function CatmullRomCurve3( points, closed, curveType, tension ) {

		Curve.call( this );

		this.type = 'CatmullRomCurve3';

		this.points = points || [];
		this.closed = closed || false;
		this.curveType = curveType || 'centripetal';
		this.tension = tension || 0.5;

	}

	CatmullRomCurve3.prototype = Object.create( Curve.prototype );
	CatmullRomCurve3.prototype.constructor = CatmullRomCurve3;

	CatmullRomCurve3.prototype.isCatmullRomCurve3 = true;

	CatmullRomCurve3.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector3();

		var points = this.points;
		var l = points.length;

		var p = ( l - ( this.closed ? 0 : 1 ) ) * t;
		var intPoint = Math.floor( p );
		var weight = p - intPoint;

		if ( this.closed ) {

			intPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / points.length ) + 1 ) * points.length;

		} else if ( weight === 0 && intPoint === l - 1 ) {

			intPoint = l - 2;
			weight = 1;

		}

		var p0, p1, p2, p3; // 4 points

		if ( this.closed || intPoint > 0 ) {

			p0 = points[ ( intPoint - 1 ) % l ];

		} else {

			// extrapolate first point
			tmp.subVectors( points[ 0 ], points[ 1 ] ).add( points[ 0 ] );
			p0 = tmp;

		}

		p1 = points[ intPoint % l ];
		p2 = points[ ( intPoint + 1 ) % l ];

		if ( this.closed || intPoint + 2 < l ) {

			p3 = points[ ( intPoint + 2 ) % l ];

		} else {

			// extrapolate last point
			tmp.subVectors( points[ l - 1 ], points[ l - 2 ] ).add( points[ l - 1 ] );
			p3 = tmp;

		}

		if ( this.curveType === 'centripetal' || this.curveType === 'chordal' ) {

			// init Centripetal / Chordal Catmull-Rom
			var pow = this.curveType === 'chordal' ? 0.5 : 0.25;
			var dt0 = Math.pow( p0.distanceToSquared( p1 ), pow );
			var dt1 = Math.pow( p1.distanceToSquared( p2 ), pow );
			var dt2 = Math.pow( p2.distanceToSquared( p3 ), pow );

			// safety check for repeated points
			if ( dt1 < 1e-4 ) dt1 = 1.0;
			if ( dt0 < 1e-4 ) dt0 = dt1;
			if ( dt2 < 1e-4 ) dt2 = dt1;

			px.initNonuniformCatmullRom( p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2 );
			py.initNonuniformCatmullRom( p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2 );
			pz.initNonuniformCatmullRom( p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2 );

		} else if ( this.curveType === 'catmullrom' ) {

			px.initCatmullRom( p0.x, p1.x, p2.x, p3.x, this.tension );
			py.initCatmullRom( p0.y, p1.y, p2.y, p3.y, this.tension );
			pz.initCatmullRom( p0.z, p1.z, p2.z, p3.z, this.tension );

		}

		point.set(
			px.calc( weight ),
			py.calc( weight ),
			pz.calc( weight )
		);

		return point;

	};

	CatmullRomCurve3.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.points = [];

		for ( var i = 0, l = source.points.length; i < l; i ++ ) {

			var point = source.points[ i ];

			this.points.push( point.clone() );

		}

		this.closed = source.closed;
		this.curveType = source.curveType;
		this.tension = source.tension;

		return this;

	};

	/**
	 * @author zz85 / http://joshuakoo.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'CatmullRomCurve3', () => {

				/* eslint-disable */
				var positions = [
					new Vector3( - 60, - 100,   60 ),
					new Vector3( - 60,    20,   60 ),
					new Vector3( - 60,   120,   60 ),
					new Vector3(   60,    20, - 60 ),
					new Vector3(   60, - 100, - 60 )
				];
				/* eslint-enable */

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isCatmullRomCurve3", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "catmullrom check", ( assert ) => {

					var curve = new CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var expectedPoints = [

						new Vector3( - 60, - 100, 60 ),
						new Vector3( - 60, - 51.04, 60 ),
						new Vector3( - 60, - 2.7199999999999998, 60 ),
						new Vector3( - 61.92, 44.48, 61.92 ),
						new Vector3( - 68.64, 95.36000000000001, 68.64 ),
						new Vector3( - 60, 120, 60 ),
						new Vector3( - 14.880000000000017, 95.36000000000001, 14.880000000000017 ),
						new Vector3( 41.75999999999997, 44.48000000000003, - 41.75999999999997 ),
						new Vector3( 67.68, - 2.720000000000023, - 67.68 ),
						new Vector3( 65.75999999999999, - 51.04000000000001, - 65.75999999999999 ),
						new Vector3( 60, - 100, - 60 )

					];

					var points = curve.getPoints( 10 );

					assert.equal( points.length, expectedPoints.length, 'correct number of points.' );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, 'points[' + i + '].x' );
						assert.numEqual( point.y, expectedPoints[ i ].y, 'points[' + i + '].y' );
						assert.numEqual( point.z, expectedPoints[ i ].z, 'points[' + i + '].z' );

					} );

				} );

				QUnit.test( "chordal basic check", ( assert ) => {

					var curve = new CatmullRomCurve3( positions );

					curve.type = 'chordal';

					var expectedPoints = [
						new Vector3( - 60, - 100, 60 ),
						new Vector3( - 60, - 52, 60 ),
						new Vector3( - 60, - 4, 60 ),
						new Vector3( - 60.656435889910924, 41.62455386421379, 60.656435889910924 ),
						new Vector3( - 62.95396150459915, 87.31049238896205, 62.95396150459915 ),
						new Vector3( - 60, 120, 60 ),
						new Vector3( - 16.302568199486444, 114.1500463116312, 16.302568199486444 ),
						new Vector3( 42.998098664956586, 54.017050116427455, - 42.998098664956586 ),
						new Vector3( 63.542500175682434, - 1.137153397546383, - 63.542500175682434 ),
						new Vector3( 62.65687513176183, - 49.85286504815978, - 62.65687513176183 ),
						new Vector3( 60.00000000000001, - 100, - 60.00000000000001 )
					];

					var points = curve.getPoints( 10 );

					assert.equal( points.length, expectedPoints.length, 'correct number of points.' );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, 'points[' + i + '].x' );
						assert.numEqual( point.y, expectedPoints[ i ].y, 'points[' + i + '].y' );
						assert.numEqual( point.z, expectedPoints[ i ].z, 'points[' + i + '].z' );

					} );

				} );

				QUnit.test( "centripetal basic check", ( assert ) => {

					var curve = new CatmullRomCurve3( positions );
					curve.type = 'centripetal';

					var expectedPoints = [
						new Vector3( - 60, - 100, 60 ),
						new Vector3( - 60, - 51.47527724919028, 60 ),
						new Vector3( - 60, - 3.300369665587032, 60 ),
						new Vector3( - 61.13836565863938, 42.86306307781241, 61.13836565863938 ),
						new Vector3( - 65.1226454638772, 90.69743905511538, 65.1226454638772 ),
						new Vector3( - 60, 120, 60 ),
						new Vector3( - 15.620412575504497, 103.10790870179872, 15.620412575504497 ),
						new Vector3( 42.384384731047874, 48.35477686933143, - 42.384384731047874 ),
						new Vector3( 65.25545512241153, - 1.646250966068339, - 65.25545512241153 ),
						new Vector3( 63.94159134180865, - 50.234688224551256, - 63.94159134180865 ),
						new Vector3( 59.99999999999999, - 100, - 59.99999999999999 ),
					];

					var points = curve.getPoints( 10 );

					assert.equal( points.length, expectedPoints.length, 'correct number of points.' );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, 'points[' + i + '].x' );
						assert.numEqual( point.y, expectedPoints[ i ].y, 'points[' + i + '].y' );
						assert.numEqual( point.z, expectedPoints[ i ].z, 'points[' + i + '].z' );

					} );

				} );

				QUnit.test( "closed catmullrom basic check", ( assert ) => {

					var curve = new CatmullRomCurve3( positions );
					curve.type = 'catmullrom';
					curve.closed = true;

					var expectedPoints = [
						new Vector3( - 60, - 100, 60 ),
						new Vector3( - 67.5, - 46.25, 67.5 ),
						new Vector3( - 60, 20, 60 ),
						new Vector3( - 67.5, 83.75, 67.5 ),
						new Vector3( - 60, 120, 60 ),
						new Vector3( 0, 83.75, 0 ),
						new Vector3( 60, 20, - 60 ),
						new Vector3( 75, - 46.25, - 75 ),
						new Vector3( 60, - 100, - 60 ),
						new Vector3( 0, - 115, 0 ),
						new Vector3( - 60, - 100, 60 ),
					];

					var points = curve.getPoints( 10 );

					assert.equal( points.length, expectedPoints.length, 'correct number of points.' );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, 'points[' + i + '].x' );
						assert.numEqual( point.y, expectedPoints[ i ].y, 'points[' + i + '].y' );
						assert.numEqual( point.z, expectedPoints[ i ].z, 'points[' + i + '].z' );

					} );

				} );

				//
				// curve.type = 'catmullrom'; only from here on
				//
				QUnit.test( "getLength/getLengths", ( assert ) => {

					var curve = new THREE.CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var length = curve.getLength();
					var expectedLength = 551.549686276872;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var expectedLengths = [
						0,
						120,
						220,
						416.9771560359221,
						536.9771560359221
					];
					var lengths = curve.getLengths( expectedLengths.length - 1 );

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var curve = new THREE.CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var expectedPoints = [
						new THREE.Vector3( - 60, - 100, 60 ),
						new THREE.Vector3( - 64.84177333183106, 64.86956465359813, 64.84177333183106 ),
						new THREE.Vector3( - 28.288507045700854, 104.83101184518996, 28.288507045700854 ),
						new THREE.Vector3( 60, - 100, - 60 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct points" );

				} );

				QUnit.test( "getTangent/getTangentAt", ( assert ) => {

					var curve = new THREE.CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var expectedTangents = [
						new THREE.Vector3( 0, 1, 0 ),
						new THREE.Vector3( - 0.0001090274561657922, 0.9999999881130137, 0.0001090274561657922 ),
						new THREE.Vector3( 0.7071067811865475, - 2.0930381713877622e-13, - 0.7071067811865475 ),
						new THREE.Vector3( 0.43189437062802816, - 0.7917919583070032, - 0.43189437062802816 ),
						new THREE.Vector3( - 0.00019991333100812723, - 0.9999999600346592, 0.00019991333100812723 )
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.25 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 0.75 ),
						curve.getTangent( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );

					} );

					//

					var expectedTangents = [
						new THREE.Vector3( 0, 1, 0 ),
						new THREE.Vector3( - 0.10709018822205997, 0.9884651653817284, 0.10709018822205997 ),
						new THREE.Vector3( 0.6396363672964268, - 0.4262987629159402, - 0.6396363672964268 ),
						new THREE.Vector3( 0.5077298411616501, - 0.6960034603275557, - 0.5077298411616501 ),
						new THREE.Vector3( - 0.00019991333100812723, - 0.9999999600346592, 0.00019991333100812723 )
					];

					var tangents = [
						curve.getTangentAt( 0 ),
						curve.getTangentAt( 0.25 ),
						curve.getTangentAt( 0.5 ),
						curve.getTangentAt( 0.75 ),
						curve.getTangentAt( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangentAt #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangentAt #" + i + ": y correct" );

					} );

				} );

				QUnit.test( "computeFrenetFrames", ( assert ) => {

					var curve = new THREE.CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var expected = {
						binormals: [
							new THREE.Vector3( - 1, 0, 0 ),
							new THREE.Vector3( - 0.28685061854203, 0.6396363672964267, - 0.7131493814579701 ),
							new THREE.Vector3( - 1.9982670528160395e-8, - 0.0001999133310081272, - 0.9999999800173295 )
						],
						normals: [
							new THREE.Vector3( 0, 0, - 1 ),
							new THREE.Vector3( - 0.7131493814579699, - 0.6396363672964268, - 0.2868506185420297 ),
							new THREE.Vector3( - 0.9999999800173294, 0.00019991333100810582, - 1.99826701852146e-8 )
						],
						tangents: [
							new THREE.Vector3( 0, 1, 0 ),
							new THREE.Vector3( 0.6396363672964269, - 0.4262987629159403, - 0.6396363672964269 ),
							new THREE.Vector3( - 0.0001999133310081273, - 0.9999999600346594, 0.0001999133310081273 )
						]
					};

					var frames = curve.computeFrenetFrames( 2, false );

					Object.keys( expected ).forEach( function ( group, i ) {

						expected[ group ].forEach( function ( vec, j ) {

							assert.numEqual( frames[ group ][ j ].x, vec.x, "Frenet frames [" + i + ", " + j + "].x correct" );
							assert.numEqual( frames[ group ][ j ].y, vec.y, "Frenet frames [" + i + ", " + j + "].y correct" );
							assert.numEqual( frames[ group ][ j ].z, vec.z, "Frenet frames [" + i + ", " + j + "].z correct" );

						} );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var curve = new THREE.CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.5, 500 );

					var expectedSomewhere = 0.8964116382083199;

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.5, 500 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var curve = new THREE.CatmullRomCurve3( positions );
					curve.type = 'catmullrom';

					var expectedPoints = [
						new THREE.Vector3( - 60, - 100, 60 ),
						new THREE.Vector3( - 60, 10.311489426555056, 60 ),
						new THREE.Vector3( - 65.05889864636504, 117.99691802595966, 65.05889864636504 ),
						new THREE.Vector3( 6.054276900088592, 78.7153118386369, - 6.054276900088592 ),
						new THREE.Vector3( 64.9991491385602, 8.386980812799566, - 64.9991491385602 ),
						new THREE.Vector3( 60, - 100, - 60 )
					];

					var points = curve.getSpacedPoints();

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'CubicBezierCurve', ( hooks ) => {

				let curve = undefined;
				hooks.before( function () {

					curve = new CubicBezierCurve(
						new Vector2( - 10, 0 ),
						new Vector2( - 5, 15 ),
						new Vector2( 20, 15 ),
						new Vector2( 10, 0 )
					);

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isCubicBezierCurve", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 3.359375, 8.4375 ),
						new Vector2( 5.625, 11.25 ),
						new Vector2( 11.796875, 8.4375 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

					// symmetry
					var curveRev = new CubicBezierCurve(
						curve.v3, curve.v2, curve.v1, curve.v0
					);

					var points = curveRev.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Reversed: Correct number of points" );
					assert.deepEqual( points, expectedPoints.reverse(), "Reversed: Correct points curve" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var length = curve.getLength();
					var expectedLength = 36.64630888504102;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var expectedLengths = [
						0,
						10.737285813492393,
						20.15159143794633,
						26.93408340370825,
						35.56079575637337
					];
					var lengths = curve.getLengths( expectedLengths.length - 1 );

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 3.3188282598022596, 8.463722639089221 ),
						new Vector2( 3.4718554735926617, 11.07899406116314 ),
						new Vector2( 10, 0 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct points" );

				} );

				QUnit.test( "getTangent/getTangentAt", ( assert ) => {

					var expectedTangents = [
						new Vector2( 0.316370061632252, 0.9486358543207215 ),
						new Vector2( 0.838961283088303, 0.5441911111721949 ),
						new Vector2( 1, 0 ),
						new Vector2( 0.47628313192245453, - 0.8792919755383518 ),
						new Vector2( - 0.5546041767829665, - 0.8321142992972107 )
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.25 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 0.75 ),
						curve.getTangent( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );

					} );

					//

					var expectedTangents = [
						new Vector2( 0.316370061632252, 0.9486358543207215 ),
						new Vector2( 0.7794223085548987, 0.6264988945935596 ),
						new Vector2( 0.988266153082452, 0.15274164681452052 ),
						new Vector2( 0.5004110404199416, - 0.8657879593906534 ),
						new Vector2( - 0.5546041767829665, - 0.8321142992972107 )
					];

					var tangents = [
						curve.getTangentAt( 0 ),
						curve.getTangentAt( 0.25 ),
						curve.getTangentAt( 0.5 ),
						curve.getTangentAt( 0.75 ),
						curve.getTangentAt( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangentAt #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangentAt #" + i + ": y correct" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.5, 1 );

					var expectedSomewhere = 0.02130029182257093;

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.5, 1 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 6.16826457740703, 6.17025727295411 ),
						new Vector2( - 0.058874033259857184, 10.1240558653185 ),
						new Vector2( 7.123523032625162, 11.154913869041575 ),
						new Vector2( 12.301846885754463, 6.808865855469985 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getSpacedPoints();

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

			} );

		} );

	} );

	function CubicBezierCurve3( v0, v1, v2, v3 ) {

		Curve.call( this );

		this.type = 'CubicBezierCurve3';

		this.v0 = v0 || new Vector3();
		this.v1 = v1 || new Vector3();
		this.v2 = v2 || new Vector3();
		this.v3 = v3 || new Vector3();

	}

	CubicBezierCurve3.prototype = Object.create( Curve.prototype );
	CubicBezierCurve3.prototype.constructor = CubicBezierCurve3;

	CubicBezierCurve3.prototype.isCubicBezierCurve3 = true;

	CubicBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector3();

		var v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;

		point.set(
			CubicBezier( t, v0.x, v1.x, v2.x, v3.x ),
			CubicBezier( t, v0.y, v1.y, v2.y, v3.y ),
			CubicBezier( t, v0.z, v1.z, v2.z, v3.z )
		);

		return point;

	};

	CubicBezierCurve3.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );
		this.v3.copy( source.v3 );

		return this;

	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'CubicBezierCurve3', ( hooks ) => {

				let curve = undefined;
				hooks.before( function () {

					curve = new CubicBezierCurve3(
						new Vector3( - 10, 0, 2 ),
						new Vector3( - 5, 15, 4 ),
						new Vector3( 20, 15, - 5 ),
						new Vector3( 10, 0, 10 )
					);

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isCubicBezierCurve3", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var expectedPoints = [
						new Vector3( - 10, 0, 2 ),
						new Vector3( - 3.359375, 8.4375, 1.984375 ),
						new Vector3( 5.625, 11.25, 1.125 ),
						new Vector3( 11.796875, 8.4375, 2.703125 ),
						new Vector3( 10, 0, 10 )
					];

					var points = curve.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

					// symmetry
					var curveRev = new CubicBezierCurve3(
						curve.v3, curve.v2, curve.v1, curve.v0
					);

					points = curveRev.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Reversed: Correct number of points" );
					assert.deepEqual( points, expectedPoints.reverse(), "Reversed: Correct points curve" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var length = curve.getLength();
					var expectedLength = 39.58103024989427;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var expectedLengths = [
						0,
						10.73729718231036,
						20.19074500737662,
						27.154413277853756,
						38.453287150114214
					];
					var lengths = curve.getLengths( expectedLengths.length - 1 );

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var expectedPoints = [
						new Vector3( - 10, 0, 2 ),
						new Vector3( - 2.591880240484318, 8.908333501170798, 1.8953420625251136 ),
						new Vector3( 4.866251460832755, 11.22787914038507, 1.150832855206874 ),
						new Vector3( 10, 0, 10 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct points" );

				} );

				QUnit.test( "getTangent/getTangentAt", ( assert ) => {

					var expectedTangents = [
						new Vector3( 0.3138715439944244, 0.9411440474105875, 0.12542940601858074 ),
						new Vector3( 0.8351825262580098, 0.54174002562179, - 0.09480449605683638 ),
						new Vector3( 0.9997531780538501, 0, - 0.02221672728433752 ),
						new Vector3( 0.40693407933981185, - 0.7512629496079668, 0.5196235518317053 ),
						new Vector3( - 0.42632467075185815, - 0.6396469221230213, 0.6396085444448543 )
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.25 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 0.75 ),
						curve.getTangent( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );

					} );

					//

					expectedTangents = [
						new Vector3( 0.3138715439944244, 0.9411440474105875, 0.12542940601858074 ),
						new Vector3( 0.8016539573770751, 0.5918626760037707, - 0.08396133262002324 ),
						new Vector3( 0.997337559412928, 0.05740742907719314, - 0.044968652092444425 ),
						new Vector3( 0.1389373097746809, - 0.7882209938358005, 0.5995032016837588 ),
						new Vector3( - 0.42632467075185815, - 0.6396469221230213, 0.6396085444448543 )
					];

					tangents = [
						curve.getTangentAt( 0 ),
						curve.getTangentAt( 0.25 ),
						curve.getTangentAt( 0.5 ),
						curve.getTangentAt( 0.75 ),
						curve.getTangentAt( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangentAt #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangentAt #" + i + ": y correct" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.5, 1 );

					var expectedSomewhere = 0.021163245321323316;

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.5, 1 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var expectedPoints = [
						new Vector3( - 10, 0, 2 ),
						new Vector3( - 5.756524515061918, 6.568020242700483, 2.22116711170301 ),
						new Vector3( 1.0003511895116906, 10.49656064587831, 1.4727101010850698 ),
						new Vector3( 8.767656412295171, 10.784286845278622, 1.2873599519775174 ),
						new Vector3( 12.306772513558396, 5.545103788071547, 4.909948454535794 ),
						new Vector3( 10, 0, 10 )
					];

					var points = curve.getSpacedPoints();

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

				QUnit.test( "computeFrenetFrames", ( assert ) => {

					var expected = {
						binormals: [
							new Vector3( - 0.9486358543207215, 0.316370061632252, - 6.938893903907228e-18 ),
							new Vector3( - 0.05491430765311864, 0.9969838307670049, 0.054842137122173326 ),
							new Vector3( 0.5944656510461876, 0.334836503700931, 0.7310917216844742 )
						],
						normals: [
							new Vector3( 0.03968210891259515, 0.11898683173537697, - 0.9921025471723304 ),
							new Vector3( - 0.047981365124836806, 0.05222670079466692, - 0.9974819097732357 ),
							new Vector3( 0.6818048583242511, - 0.6919077473246573, - 0.23749906180354932 )
						],
						tangents: [
							new Vector3( 0.3138715439944244, 0.9411440474105875, 0.12542940601858074 ),
							new Vector3( 0.9973375594129282, 0.05740742907719315, - 0.04496865209244443 ),
							new Vector3( - 0.42632467075185815, - 0.6396469221230213, 0.6396085444448543 )
						]
					};

					var frames = curve.computeFrenetFrames( 2, false );

					Object.keys( expected ).forEach( function ( group, i ) {

						expected[ group ].forEach( function ( vec, j ) {

							assert.numEqual( frames[ group ][ j ].x, vec.x, "Frenet frames [" + i + ", " + j + "].x correct" );
							assert.numEqual( frames[ group ][ j ].y, vec.y, "Frenet frames [" + i + ", " + j + "].y correct" );
							assert.numEqual( frames[ group ][ j ].z, vec.z, "Frenet frames [" + i + ", " + j + "].z correct" );

						} );

					} );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'EllipseCurve', ( hooks ) => {

				let curve = undefined;
				hooks.before( function () {

					curve = new EllipseCurve(
						0, 0, // ax, aY
						10, 10, // xRadius, yRadius
						0, 2 * Math.PI, // aStartAngle, aEndAngle
						false, // aClockwise
						0 // aRotation
					);

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isEllipseCurve", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var expectedPoints = [
						new Vector2( 10, 0 ),
						new Vector2( 0, 10 ),
						new Vector2( - 10, 0 ),
						new Vector2( 0, - 10 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, "point[" + i + "].x correct" );
						assert.numEqual( point.y, expectedPoints[ i ].y, "point[" + i + "].y correct" );

					} );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var length = curve.getLength();
					var expectedLength = 62.829269247282795;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var lengths = curve.getLengths( 5 );
					var expectedLengths = [
						0,
						11.755705045849462,
						23.51141009169892,
						35.26711513754839,
						47.02282018339785,
						58.77852522924731
					];

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getPoint/getPointAt", ( assert ) => {

					var testValues = [ 0, 0.3, 0.5, 0.7, 1 ];

					testValues.forEach( function ( val, i ) {

						var expectedX = Math.cos( val * Math.PI * 2 ) * 10;
						var expectedY = Math.sin( val * Math.PI * 2 ) * 10;

						var p = curve.getPoint( val );
						var a = curve.getPointAt( val );

						assert.numEqual( p.x, expectedX, "getPoint(" + val + ").x correct" );
						assert.numEqual( p.y, expectedY, "getPoint(" + val + ").y correct" );

						assert.numEqual( a.x, expectedX, "getPointAt(" + val + ").x correct" );
						assert.numEqual( a.y, expectedY, "getPointAt(" + val + ").y correct" );

					} );

				} );

				QUnit.test( "getTangent", ( assert ) => {

					var expectedTangents = [
						new Vector2( - 0.000314159260186071, 0.9999999506519786 ),
						new Vector2( - 1, 0 ),
						new Vector2( 0, - 1 ),
						new Vector2( 1, 0 ),
						new Vector2( 0.00031415926018600165, 0.9999999506519784 )
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.25 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 0.75 ),
						curve.getTangent( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.7, 1 );

					var expectedSomewhere = 0.01591614882650014;

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.7, 1 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var expectedPoints = [
						new Vector2( 10, 0 ),
						new Vector2( 3.0901699437494603, 9.51056516295154 ),
						new Vector2( - 8.090169943749492, 5.877852522924707 ),
						new Vector2( - 8.090169943749459, - 5.877852522924751 ),
						new Vector2( 3.0901699437494807, - 9.510565162951533 ),
						new Vector2( 10, - 2.4492935982947065e-15 )
					];

					var points = curve.getSpacedPoints();

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );

					expectedPoints.forEach( function ( exp, i ) {

						var point = points[ i ];

						assert.numEqual( point.x, exp.x, "Point #" + i + ": x correct" );
						assert.numEqual( point.y, exp.y, "Point #" + i + ": y correct" );

					} );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'LineCurve', ( hooks ) => {

				let _points = undefined;
				let _curve = undefined;
				hooks.before( function () {

					_points = [
						new Vector2( 0, 0 ),
						new Vector2( 10, 10 ),
						new Vector2( - 10, 10 ),
						new Vector2( - 8, 5 )
					];

					_curve = new LineCurve( _points[ 0 ], _points[ 1 ] );

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isLineCurve", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var curve = new LineCurve( _points[ 0 ], _points[ 3 ] );

					var expectedPoints = [
						new Vector2( 0, 0 ),
						new Vector2( - 2.4, 1.5 ),
						new Vector2( - 4, 2.5 ),
						new Vector2( - 8, 5 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct points" );

				} );

				QUnit.test( "getTangent", ( assert ) => {

					var curve = _curve;

					var tangent = curve.getTangent( 0 );
					var expectedTangent = Math.sqrt( 0.5 );

					assert.numEqual( tangent.x, expectedTangent, "tangent.x correct" );
					assert.numEqual( tangent.y, expectedTangent, "tangent.y correct" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( 0, 0 ),
						new Vector2( 2, 2 ),
						new Vector2( 4, 4 ),
						new Vector2( 6, 6 ),
						new Vector2( 8, 8 ),
						new Vector2( 10, 10 )
					];

					var points = curve.getPoints();

					assert.deepEqual( points, expectedPoints, "Correct points for first curve" );

					//

					curve = new LineCurve( _points[ 1 ], _points[ 2 ] );

					expectedPoints = [
						new Vector2( 10, 10 ),
						new Vector2( 6, 10 ),
						new Vector2( 2, 10 ),
						new Vector2( - 2, 10 ),
						new Vector2( - 6, 10 ),
						new Vector2( - 10, 10 )
					];

					points = curve.getPoints();

					assert.deepEqual( points, expectedPoints, "Correct points for second curve" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var curve = _curve;

					var length = curve.getLength();
					var expectedLength = Math.sqrt( 200 );

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var lengths = curve.getLengths( 5 );
					var expectedLengths = [
						0.0,
						Math.sqrt( 8 ),
						Math.sqrt( 32 ),
						Math.sqrt( 72 ),
						Math.sqrt( 128 ),
						Math.sqrt( 200 )
					];

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var curve = _curve;

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.3, 0 );

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, 0.3, "getUtoTmapping( 0.3, 0 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( 0, 0 ),
						new Vector2( 2.5, 2.5 ),
						new Vector2( 5, 5 ),
						new Vector2( 7.5, 7.5 ),
						new Vector2( 10, 10 )
					];

					var points = curve.getSpacedPoints( 4 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

			} );

		} );

	} );

	function LineCurve3( v1, v2 ) {

		Curve.call( this );

		this.type = 'LineCurve3';

		this.v1 = v1 || new Vector3();
		this.v2 = v2 || new Vector3();

	}

	LineCurve3.prototype = Object.create( Curve.prototype );
	LineCurve3.prototype.constructor = LineCurve3;

	LineCurve3.prototype.isLineCurve3 = true;

	LineCurve3.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector3();

		if ( t === 1 ) {

			point.copy( this.v2 );

		} else {

			point.copy( this.v2 ).sub( this.v1 );
			point.multiplyScalar( t ).add( this.v1 );

		}

		return point;

	};

	// Line curve is linear, so we can overwrite default getPointAt

	LineCurve3.prototype.getPointAt = function ( u, optionalTarget ) {

		return this.getPoint( u, optionalTarget );

	};

	LineCurve3.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );

		return this;

	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'LineCurve3', ( hooks ) => {

				let _points = undefined;
				let _curve = undefined;
				hooks.before( function () {

					_points = [
						new Vector3( 0, 0, 0 ),
						new Vector3( 10, 10, 10 ),
						new Vector3( - 10, 10, - 10 ),
						new Vector3( - 8, 5, - 7 )
					];

					_curve = new LineCurve3( _points[ 0 ], _points[ 1 ] );

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isCatmullRomCurve3", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var curve = new LineCurve3( _points[ 0 ], _points[ 3 ] );

					var expectedPoints = [
						new Vector3( 0, 0, 0 ),
						new Vector3( - 2.4, 1.5, - 2.1 ),
						new Vector3( - 4, 2.5, - 3.5 ),
						new Vector3( - 8, 5, - 7 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct getPointAt points" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector3( 0, 0, 0 ),
						new Vector3( 2, 2, 2 ),
						new Vector3( 4, 4, 4 ),
						new Vector3( 6, 6, 6 ),
						new Vector3( 8, 8, 8 ),
						new Vector3( 10, 10, 10 )
					];

					var points = curve.getPoints();

					assert.deepEqual( points, expectedPoints, "Correct points for first curve" );

					//

					curve = new LineCurve3( _points[ 1 ], _points[ 2 ] );

					expectedPoints = [
						new Vector3( 10, 10, 10 ),
						new Vector3( 6, 10, 6 ),
						new Vector3( 2, 10, 2 ),
						new Vector3( - 2, 10, - 2 ),
						new Vector3( - 6, 10, - 6 ),
						new Vector3( - 10, 10, - 10 )
					];

					points = curve.getPoints();

					assert.deepEqual( points, expectedPoints, "Correct points for second curve" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var curve = _curve;

					var length = curve.getLength();
					var expectedLength = Math.sqrt( 300 );

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var lengths = curve.getLengths( 5 );
					var expectedLengths = [
						0.0,
						Math.sqrt( 12 ),
						Math.sqrt( 48 ),
						Math.sqrt( 108 ),
						Math.sqrt( 192 ),
						Math.sqrt( 300 )
					];

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getTangent/getTangentAt", ( assert ) => {

					var curve = _curve;

					var tangent = curve.getTangent( 0.5 );
					var expectedTangent = Math.sqrt( 1 / 3 );

					assert.numEqual( tangent.x, expectedTangent, "tangent.x correct" );
					assert.numEqual( tangent.y, expectedTangent, "tangent.y correct" );
					assert.numEqual( tangent.z, expectedTangent, "tangent.z correct" );

					tangent = curve.getTangentAt( 0.5 );

					assert.numEqual( tangent.x, expectedTangent, "tangentAt.x correct" );
					assert.numEqual( tangent.y, expectedTangent, "tangentAt.y correct" );
					assert.numEqual( tangent.z, expectedTangent, "tangentAt.z correct" );

				} );

				QUnit.test( "computeFrenetFrames", ( assert ) => {

					var curve = _curve;

					var expected = {
						binormals: new Vector3( - 0.5 * Math.sqrt( 2 ), 0.5 * Math.sqrt( 2 ), 0 ),
						normals: new Vector3( Math.sqrt( 1 / 6 ), Math.sqrt( 1 / 6 ), - Math.sqrt( 2 / 3 ) ),
						tangents: new Vector3( Math.sqrt( 1 / 3 ), Math.sqrt( 1 / 3 ), Math.sqrt( 1 / 3 ) )
					};

					var frames = curve.computeFrenetFrames( 1, false );

					for ( var val in expected ) {

						assert.numEqual( frames[ val ][ 0 ].x, expected[ val ].x, "Frenet frames " + val + ".x correct" );
						assert.numEqual( frames[ val ][ 0 ].y, expected[ val ].y, "Frenet frames " + val + ".y correct" );
						assert.numEqual( frames[ val ][ 0 ].z, expected[ val ].z, "Frenet frames " + val + ".z correct" );

					}

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var curve = _curve;

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.7, 0 );

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, 0.7, "getUtoTmapping( 0.7, 0 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector3( 0, 0, 0 ),
						new Vector3( 2.5, 2.5, 2.5 ),
						new Vector3( 5, 5, 5 ),
						new Vector3( 7.5, 7.5, 7.5 ),
						new Vector3( 10, 10, 10 )
					];

					var points = curve.getSpacedPoints( 4 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'QuadraticBezierCurve', ( hooks ) => {

				let _curve = undefined;
				hooks.before( function () {

					_curve = new QuadraticBezierCurve(
						new Vector2( - 10, 0 ),
						new Vector2( 20, 15 ),
						new Vector2( 10, 0 )
					);

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isQuadraticBezierCurve", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( 2.5, 5.625 ),
						new Vector2( 10, 7.5 ),
						new Vector2( 12.5, 5.625 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

					// symmetry
					var curveRev = new QuadraticBezierCurve(
						curve.v2, curve.v1, curve.v0
					);

					points = curveRev.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Reversed: Correct number of points" );
					assert.deepEqual( points, expectedPoints.reverse(), "Reversed: Correct points curve" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var curve = _curve;

					var length = curve.getLength();
					var expectedLength = 31.269026549416683;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var expectedLengths = [
						0,
						13.707320124663317,
						21.43814317269643,
						24.56314317269643,
						30.718679298818998
					];
					var lengths = curve.getLengths( expectedLengths.length - 1 );

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 1.5127849599387615, 3.993582003773624 ),
						new Vector2( 4.310076165722796, 6.269921971403917 ),
						new Vector2( 10, 0 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct points" );

				} );

				QUnit.test( "getTangent/getTangentAt", ( assert ) => {

					var curve = _curve;

					var expectedTangents = [
						new Vector2( 0.89443315420562, 0.44720166888975904 ),
						new Vector2( 0.936329177569021, 0.3511234415884543 ),
						new Vector2( 1, 0 ),
						new Vector2( - 5.921189464667277e-13, - 1 ),
						new Vector2( - 0.5546617882904897, - 0.8320758983472577 )
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.25 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 0.75 ),
						curve.getTangent( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );

					} );

					//

					expectedTangents = [
						new Vector2( 0.89443315420562, 0.44720166888975904 ),
						new Vector2( 0.9125211423360805, 0.40902954024086674 ),
						new Vector2( 0.9480289098765387, 0.3181842014278863 ),
						new Vector2( 0.7969127189169473, - 0.6040944615111106 ),
						new Vector2( - 0.5546617882904897, - 0.8320758983472577 )
					];

					tangents = [
						curve.getTangentAt( 0 ),
						curve.getTangentAt( 0.25 ),
						curve.getTangentAt( 0.5 ),
						curve.getTangentAt( 0.75 ),
						curve.getTangentAt( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangentAt #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangentAt #" + i + ": y correct" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var curve = _curve;

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.5, 1 );

					var expectedSomewhere = 0.015073978276116116;

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.5, 1 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 4.366603655406173, 2.715408933540383 ),
						new Vector2( 1.3752241477827831, 5.191972084404416 ),
						new Vector2( 7.312990279153634, 7.136310044848586 ),
						new Vector2( 12.499856644824826, 5.653289188715387 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getSpacedPoints();

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

			} );

		} );

	} );

	function QuadraticBezierCurve3( v0, v1, v2 ) {

		Curve.call( this );

		this.type = 'QuadraticBezierCurve3';

		this.v0 = v0 || new Vector3();
		this.v1 = v1 || new Vector3();
		this.v2 = v2 || new Vector3();

	}

	QuadraticBezierCurve3.prototype = Object.create( Curve.prototype );
	QuadraticBezierCurve3.prototype.constructor = QuadraticBezierCurve3;

	QuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;

	QuadraticBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {

		var point = optionalTarget || new Vector3();

		var v0 = this.v0, v1 = this.v1, v2 = this.v2;

		point.set(
			QuadraticBezier( t, v0.x, v1.x, v2.x ),
			QuadraticBezier( t, v0.y, v1.y, v2.y ),
			QuadraticBezier( t, v0.z, v1.z, v2.z )
		);

		return point;

	};

	QuadraticBezierCurve3.prototype.copy = function ( source ) {

		Curve.prototype.copy.call( this, source );

		this.v0.copy( source.v0 );
		this.v1.copy( source.v1 );
		this.v2.copy( source.v2 );

		return this;

	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'QuadraticBezierCurve3', ( hooks ) => {

				let _curve = undefined;
				hooks.before( function () {

					_curve = new QuadraticBezierCurve3(
						new Vector3( - 10, 0, 2 ),
						new Vector3( 20, 15, - 5 ),
						new Vector3( 10, 0, 10 )
					);

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isQuadraticBezierCurve3", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector3( - 10, 0, 2 ),
						new Vector3( 2.5, 5.625, - 0.125 ),
						new Vector3( 10, 7.5, 0.5 ),
						new Vector3( 12.5, 5.625, 3.875 ),
						new Vector3( 10, 0, 10 )
					];

					var points = curve.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

					// symmetry
					var curveRev = new QuadraticBezierCurve3(
						curve.v2, curve.v1, curve.v0
					);

					points = curveRev.getPoints( expectedPoints.length - 1 );

					assert.strictEqual( points.length, expectedPoints.length, "Reversed: Correct number of points" );
					assert.deepEqual( points, expectedPoints.reverse(), "Reversed: Correct points curve" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var curve = _curve;

					var length = curve.getLength();
					var expectedLength = 35.47294274967861;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var expectedLengths = [
						0,
						13.871057998581074,
						21.62710402732536,
						26.226696400568883,
						34.91037361704809
					];
					var lengths = curve.getLengths( expectedLengths.length - 1 );

					assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );

					lengths.forEach( function ( segment, i ) {

						assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );

					} );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector3( - 10, 0, 2 ),
						new Vector3( - 0.4981634504454243, 4.427089043881476, 0.19308849757196012 ),
						new Vector3( 6.149415812887238, 6.838853310980195, - 0.20278120208668637 ),
						new Vector3( 10, 0, 10 )
					];

					var points = [
						curve.getPointAt( 0 ),
						curve.getPointAt( 0.3 ),
						curve.getPointAt( 0.5 ),
						curve.getPointAt( 1 )
					];

					assert.deepEqual( points, expectedPoints, "Correct points" );

				} );

				QUnit.test( "getTangent/getTangentAt", ( assert ) => {

					var curve = _curve;

					var expectedTangents = [
						new Vector3( 0.8755715084258769, 0.4377711603816079, - 0.2042815331129452 ),
						new Vector3( 0.9340289249885844, 0.3502608468707904, - 0.07005216937416067 ),
						new Vector3( 0.9284766908853163, 0, 0.37139067635396156 ),
						new Vector3( - 3.669031233375946e-13, - 0.6196442885791218, 0.7848827655333463 ),
						new Vector3( - 0.4263618889888853, - 0.6396068005601663, 0.6396238584473043 )
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.25 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 0.75 ),
						curve.getTangent( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );

					} );

					//

					expectedTangents = [
						new Vector3( 0.8755715084258769, 0.4377711603816079, - 0.2042815331129452 ),
						new Vector3( 0.9060725703490549, 0.3984742932857448, - 0.14230507668907377 ),
						new Vector3( 0.9621604167456882, 0.2688562845452628, 0.044312872940942424 ),
						new Vector3( 0.016586454041780826, - 0.6163270940470614, 0.7873155674098058 ),
						new Vector3( - 0.4263618889888853, - 0.6396068005601663, 0.6396238584473043 )
					];

					tangents = [
						curve.getTangentAt( 0 ),
						curve.getTangentAt( 0.25 ),
						curve.getTangentAt( 0.5 ),
						curve.getTangentAt( 0.75 ),
						curve.getTangentAt( 1 )
					];

					expectedTangents.forEach( function ( exp, i ) {

						var tangent = tangents[ i ];

						assert.numEqual( tangent.x, exp.x, "getTangentAt #" + i + ": x correct" );
						assert.numEqual( tangent.y, exp.y, "getTangentAt #" + i + ": y correct" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var curve = _curve;

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var somewhere = curve.getUtoTmapping( 0.5, 1 );

					var expectedSomewhere = 0.014760890927167196;

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.5, 1 ) is correct" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector3( - 10, 0, 2 ),
						new Vector3( - 3.712652983516992, 3.015179001762753, 0.6957120710270492 ),
						new Vector3( 2.7830973773262975, 5.730399338061483, - 0.1452668772806931 ),
						new Vector3( 9.575825284074465, 7.48754187603603, 0.3461104039841496 ),
						new Vector3( 12.345199937734154, 4.575759904730531, 5.142117429101656 ),
						new Vector3( 10, 0, 10 )
					];

					var points = curve.getSpacedPoints();

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
					assert.deepEqual( points, expectedPoints, "Correct points calculated" );

				} );

				QUnit.test( "computeFrenetFrames", ( assert ) => {

					var curve = _curve;

					var expected = {
						binormals: [
							new Vector3( - 0.447201668889759, 0.8944331542056199, 0 ),
							new Vector3( - 0.2684231751110917, 0.9631753839815436, - 0.01556209353802903 ),
							new Vector3( 0.3459273556592433, 0.53807011680075, 0.7686447905324219 )
						],
						normals: [
							new Vector3( - 0.18271617600817133, - 0.09135504253146765, - 0.9789121795283909 ),
							new Vector3( 0.046865035058597876, - 0.003078628350883253, - 0.9988964863970807 ),
							new Vector3( 0.8357929194629689, - 0.5489842348221077, 0.008155102228190641 )
						],
						tangents: [
							new Vector3( 0.8755715084258767, 0.4377711603816078, - 0.20428153311294514 ),
							new Vector3( 0.9621604167456884, 0.26885628454526284, 0.04431287294094243 ),
							new Vector3( - 0.4263618889888853, - 0.6396068005601663, 0.6396238584473043 )
						]
					};

					var frames = curve.computeFrenetFrames( 2, false );

					Object.keys( expected ).forEach( function ( group, i ) {

						expected[ group ].forEach( function ( vec, j ) {

							assert.numEqual( frames[ group ][ j ].x, vec.x, "Frenet frames [" + i + ", " + j + "].x correct" );
							assert.numEqual( frames[ group ][ j ].y, vec.y, "Frenet frames [" + i + ", " + j + "].y correct" );
							assert.numEqual( frames[ group ][ j ].z, vec.z, "Frenet frames [" + i + ", " + j + "].z correct" );

						} );

					} );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Curves', () => {

			QUnit.module.todo( 'SplineCurve', ( hooks ) => {

				let _curve = undefined;
				hooks.before( function () {

					_curve = new SplineCurve( [
						new Vector2( - 10, 0 ),
						new Vector2( - 5, 5 ),
						new Vector2( 0, 0 ),
						new Vector2( 5, - 5 ),
						new Vector2( 10, 0 )
					] );

				} );

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isSplineCurve", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getPoint", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// OTHERS
				QUnit.test( "Simple curve", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 6.08, 4.56 ),
						new Vector2( - 2, 2.48 ),
						new Vector2( 2, - 2.48 ),
						new Vector2( 6.08, - 4.56 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getPoints( 5 );

					assert.strictEqual( points.length, expectedPoints.length, "1st: Correct number of points" );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, "points[" + i + "].x" );
						assert.numEqual( point.y, expectedPoints[ i ].y, "points[" + i + "].y" );

					} );

					//

					points = curve.getPoints( 4 );

					assert.deepEqual( points, curve.points, "2nd: Returned points are identical to control points" );

				} );

				QUnit.test( "getLength/getLengths", ( assert ) => {

					var curve = _curve;

					var length = curve.getLength();
					var expectedLength = 28.876950901868135;

					assert.numEqual( length, expectedLength, "Correct length of curve" );

					var expectedLengths = [
						0.0,
						Math.sqrt( 50 ),
						Math.sqrt( 200 ),
						Math.sqrt( 450 ),
						Math.sqrt( 800 )
					];

					var lengths = curve.getLengths( 4 );

					assert.deepEqual( lengths, expectedLengths, "Correct segment lengths" );

				} );

				QUnit.test( "getPointAt", ( assert ) => {

					var curve = _curve;

					assert.ok( curve.getPointAt( 0 ).equals( curve.points[ 0 ] ), "PointAt 0.0 correct" );
					assert.ok( curve.getPointAt( 1 ).equals( curve.points[ 4 ] ), "PointAt 1.0 correct" );

					var pointAt = curve.getPointAt( 0.5 );
					assert.numEqual( pointAt.x, 0.0, "PointAt 0.5 x correct" );
					assert.numEqual( pointAt.y, 0.0, "PointAt 0.5 y correct" );

				} );

				QUnit.test( "getTangent", ( assert ) => {

					var curve = _curve;

					var expectedTangent = [
						new Vector2( 0.7068243340243188, 0.7073891155729485 ), // 0
						new Vector2( 0.7069654305325396, - 0.7072481035902046 ), // 0.5
						new Vector2( 0.7068243340245123, 0.7073891155727552 ) // 1
					];

					var tangents = [
						curve.getTangent( 0 ),
						curve.getTangent( 0.5 ),
						curve.getTangent( 1 )
					];

					tangents.forEach( function ( tangent, i ) {

						assert.numEqual( tangent.x, expectedTangent[ i ].x, "tangent[" + i + "].x" );
						assert.numEqual( tangent.y, expectedTangent[ i ].y, "tangent[" + i + "].y" );

					} );

				} );

				QUnit.test( "getUtoTmapping", ( assert ) => {

					var curve = _curve;

					var start = curve.getUtoTmapping( 0, 0 );
					var end = curve.getUtoTmapping( 0, curve.getLength() );
					var middle = curve.getUtoTmapping( 0.5, 0 );

					assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
					assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
					assert.numEqual( middle, 0.5, "getUtoTmapping( 0.5, 0 ) is the middle" );

				} );

				QUnit.test( "getSpacedPoints", ( assert ) => {

					var curve = _curve;

					var expectedPoints = [
						new Vector2( - 10, 0 ),
						new Vector2( - 4.996509634683014, 4.999995128640857 ),
						new Vector2( 0, 0 ),
						new Vector2( 4.996509634683006, - 4.999995128640857 ),
						new Vector2( 10, 0 )
					];

					var points = curve.getSpacedPoints( 4 );

					assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );

					points.forEach( function ( point, i ) {

						assert.numEqual( point.x, expectedPoints[ i ].x, "points[" + i + "].x" );
						assert.numEqual( point.y, expectedPoints[ i ].y, "points[" + i + "].y" );

					} );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Extras', () => {

		QUnit.module( 'Objects', () => {

			QUnit.module.todo( 'ImmediateRenderObject', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "isImmediateRenderObject", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'BoxGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					width: 10,
					height: 20,
					depth: 30,
					widthSegments: 2,
					heightSegments: 3,
					depthSegments: 4
				};

				geometries = [
					new BoxGeometry(),
					new BoxGeometry( parameters.width, parameters.height, parameters.depth ),
					new BoxGeometry( parameters.width, parameters.height, parameters.depth, parameters.widthSegments, parameters.heightSegments, parameters.depthSegments )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'BoxBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					width: 10,
					height: 20,
					depth: 30,
					widthSegments: 2,
					heightSegments: 3,
					depthSegments: 4
				};

				geometries = [
					new BoxBufferGeometry(),
					new BoxBufferGeometry( parameters.width, parameters.height, parameters.depth ),
					new BoxBufferGeometry( parameters.width, parameters.height, parameters.depth, parameters.widthSegments, parameters.heightSegments, parameters.depthSegments )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author benaadams / https://twitter.com/ben_a_adams
	 * @author Mugen87 / https://github.com/Mugen87
	 * @author hughes
	 */

	// CircleGeometry

	function CircleGeometry( radius, segments, thetaStart, thetaLength ) {

		Geometry.call( this );

		this.type = 'CircleGeometry';

		this.parameters = {
			radius: radius,
			segments: segments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		this.fromBufferGeometry( new CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );
		this.mergeVertices();

	}

	CircleGeometry.prototype = Object.create( Geometry.prototype );
	CircleGeometry.prototype.constructor = CircleGeometry;

	// CircleBufferGeometry

	function CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) {

		BufferGeometry.call( this );

		this.type = 'CircleBufferGeometry';

		this.parameters = {
			radius: radius,
			segments: segments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		radius = radius || 1;
		segments = segments !== undefined ? Math.max( 3, segments ) : 8;

		thetaStart = thetaStart !== undefined ? thetaStart : 0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// helper variables

		var i, s;
		var vertex = new Vector3();
		var uv = new Vector2();

		// center point

		vertices.push( 0, 0, 0 );
		normals.push( 0, 0, 1 );
		uvs.push( 0.5, 0.5 );

		for ( s = 0, i = 3; s <= segments; s ++, i += 3 ) {

			var segment = thetaStart + s / segments * thetaLength;

			// vertex

			vertex.x = radius * Math.cos( segment );
			vertex.y = radius * Math.sin( segment );

			vertices.push( vertex.x, vertex.y, vertex.z );

			// normal

			normals.push( 0, 0, 1 );

			// uvs

			uv.x = ( vertices[ i ] / radius + 1 ) / 2;
			uv.y = ( vertices[ i + 1 ] / radius + 1 ) / 2;

			uvs.push( uv.x, uv.y );

		}

		// indices

		for ( i = 1; i <= segments; i ++ ) {

			indices.push( i, i + 1, 0 );

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

	}

	CircleBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	CircleBufferGeometry.prototype.constructor = CircleBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'CircleGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					segments: 20,
					thetaStart: 0.1,
					thetaLength: 0.2
				};

				geometries = [
					new CircleGeometry(),
					new CircleGeometry( parameters.radius ),
					new CircleGeometry( parameters.radius, parameters.segments ),
					new CircleGeometry( parameters.radius, parameters.segments, parameters.thetaStart ),
					new CircleGeometry( parameters.radius, parameters.segments, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'CircleBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					segments: 20,
					thetaStart: 0.1,
					thetaLength: 0.2
				};

				geometries = [
					new CircleBufferGeometry(),
					new CircleBufferGeometry( parameters.radius ),
					new CircleBufferGeometry( parameters.radius, parameters.segments ),
					new CircleBufferGeometry( parameters.radius, parameters.segments, parameters.thetaStart ),
					new CircleBufferGeometry( parameters.radius, parameters.segments, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// CylinderGeometry

	function CylinderGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

		Geometry.call( this );

		this.type = 'CylinderGeometry';

		this.parameters = {
			radiusTop: radiusTop,
			radiusBottom: radiusBottom,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		this.fromBufferGeometry( new CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) );
		this.mergeVertices();

	}

	CylinderGeometry.prototype = Object.create( Geometry.prototype );
	CylinderGeometry.prototype.constructor = CylinderGeometry;

	// CylinderBufferGeometry

	function CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

		BufferGeometry.call( this );

		this.type = 'CylinderBufferGeometry';

		this.parameters = {
			radiusTop: radiusTop,
			radiusBottom: radiusBottom,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		var scope = this;

		radiusTop = radiusTop !== undefined ? radiusTop : 1;
		radiusBottom = radiusBottom !== undefined ? radiusBottom : 1;
		height = height || 1;

		radialSegments = Math.floor( radialSegments ) || 8;
		heightSegments = Math.floor( heightSegments ) || 1;

		openEnded = openEnded !== undefined ? openEnded : false;
		thetaStart = thetaStart !== undefined ? thetaStart : 0.0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// helper variables

		var index = 0;
		var indexArray = [];
		var halfHeight = height / 2;
		var groupStart = 0;

		// generate geometry

		generateTorso();

		if ( openEnded === false ) {

			if ( radiusTop > 0 ) generateCap( true );
			if ( radiusBottom > 0 ) generateCap( false );

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

		function generateTorso() {

			var x, y;
			var normal = new Vector3();
			var vertex = new Vector3();

			var groupCount = 0;

			// this will be used to calculate the normal
			var slope = ( radiusBottom - radiusTop ) / height;

			// generate vertices, normals and uvs

			for ( y = 0; y <= heightSegments; y ++ ) {

				var indexRow = [];

				var v = y / heightSegments;

				// calculate the radius of the current row

				var radius = v * ( radiusBottom - radiusTop ) + radiusTop;

				for ( x = 0; x <= radialSegments; x ++ ) {

					var u = x / radialSegments;

					var theta = u * thetaLength + thetaStart;

					var sinTheta = Math.sin( theta );
					var cosTheta = Math.cos( theta );

					// vertex

					vertex.x = radius * sinTheta;
					vertex.y = - v * height + halfHeight;
					vertex.z = radius * cosTheta;
					vertices.push( vertex.x, vertex.y, vertex.z );

					// normal

					normal.set( sinTheta, slope, cosTheta ).normalize();
					normals.push( normal.x, normal.y, normal.z );

					// uv

					uvs.push( u, 1 - v );

					// save index of vertex in respective row

					indexRow.push( index ++ );

				}

				// now save vertices of the row in our index array

				indexArray.push( indexRow );

			}

			// generate indices

			for ( x = 0; x < radialSegments; x ++ ) {

				for ( y = 0; y < heightSegments; y ++ ) {

					// we use the index array to access the correct indices

					var a = indexArray[ y ][ x ];
					var b = indexArray[ y + 1 ][ x ];
					var c = indexArray[ y + 1 ][ x + 1 ];
					var d = indexArray[ y ][ x + 1 ];

					// faces

					indices.push( a, b, d );
					indices.push( b, c, d );

					// update group counter

					groupCount += 6;

				}

			}

			// add a group to the geometry. this will ensure multi material support

			scope.addGroup( groupStart, groupCount, 0 );

			// calculate new start value for groups

			groupStart += groupCount;

		}

		function generateCap( top ) {

			var x, centerIndexStart, centerIndexEnd;

			var uv = new Vector2();
			var vertex = new Vector3();

			var groupCount = 0;

			var radius = ( top === true ) ? radiusTop : radiusBottom;
			var sign = ( top === true ) ? 1 : - 1;

			// save the index of the first center vertex
			centerIndexStart = index;

			// first we generate the center vertex data of the cap.
			// because the geometry needs one set of uvs per face,
			// we must generate a center vertex per face/segment

			for ( x = 1; x <= radialSegments; x ++ ) {

				// vertex

				vertices.push( 0, halfHeight * sign, 0 );

				// normal

				normals.push( 0, sign, 0 );

				// uv

				uvs.push( 0.5, 0.5 );

				// increase index

				index ++;

			}

			// save the index of the last center vertex

			centerIndexEnd = index;

			// now we generate the surrounding vertices, normals and uvs

			for ( x = 0; x <= radialSegments; x ++ ) {

				var u = x / radialSegments;
				var theta = u * thetaLength + thetaStart;

				var cosTheta = Math.cos( theta );
				var sinTheta = Math.sin( theta );

				// vertex

				vertex.x = radius * sinTheta;
				vertex.y = halfHeight * sign;
				vertex.z = radius * cosTheta;
				vertices.push( vertex.x, vertex.y, vertex.z );

				// normal

				normals.push( 0, sign, 0 );

				// uv

				uv.x = ( cosTheta * 0.5 ) + 0.5;
				uv.y = ( sinTheta * 0.5 * sign ) + 0.5;
				uvs.push( uv.x, uv.y );

				// increase index

				index ++;

			}

			// generate indices

			for ( x = 0; x < radialSegments; x ++ ) {

				var c = centerIndexStart + x;
				var i = centerIndexEnd + x;

				if ( top === true ) {

					// face top

					indices.push( i, i + 1, c );

				} else {

					// face bottom

					indices.push( i + 1, i, c );

				}

				groupCount += 3;

			}

			// add a group to the geometry. this will ensure multi material support

			scope.addGroup( groupStart, groupCount, top === true ? 1 : 2 );

			// calculate new start value for groups

			groupStart += groupCount;

		}

	}

	CylinderBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	CylinderBufferGeometry.prototype.constructor = CylinderBufferGeometry;

	/**
	 * @author abelnation / http://github.com/abelnation
	 */

	// ConeGeometry

	function ConeGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

		CylinderGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );

		this.type = 'ConeGeometry';

		this.parameters = {
			radius: radius,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

	}

	ConeGeometry.prototype = Object.create( CylinderGeometry.prototype );
	ConeGeometry.prototype.constructor = ConeGeometry;

	// ConeBufferGeometry

	function ConeBufferGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {

		CylinderBufferGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );

		this.type = 'ConeBufferGeometry';

		this.parameters = {
			radius: radius,
			height: height,
			radialSegments: radialSegments,
			heightSegments: heightSegments,
			openEnded: openEnded,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

	}

	ConeBufferGeometry.prototype = Object.create( CylinderBufferGeometry.prototype );
	ConeBufferGeometry.prototype.constructor = ConeBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'ConeGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new ConeGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'ConeBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new ConeBufferGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'CylinderGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radiusTop: 10,
					radiusBottom: 20,
					height: 30,
					radialSegments: 20,
					heightSegments: 30,
					openEnded: true,
					thetaStart: 0.1,
					thetaLength: 2.0,
				};

				geometries = [
					new CylinderGeometry(),
					new CylinderGeometry( parameters.radiusTop ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments, parameters.openEnded ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments, parameters.openEnded, parameters.thetaStart ),
					new CylinderGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments, parameters.openEnded, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'CylinderBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radiusTop: 10,
					radiusBottom: 20,
					height: 30,
					radialSegments: 20,
					heightSegments: 30,
					openEnded: true,
					thetaStart: 0.1,
					thetaLength: 2.0,
				};

				geometries = [
					new CylinderBufferGeometry(),
					new CylinderBufferGeometry( parameters.radiusTop ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments, parameters.openEnded ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments, parameters.openEnded, parameters.thetaStart ),
					new CylinderBufferGeometry( parameters.radiusTop, parameters.radiusBottom, parameters.height, parameters.radialSegments, parameters.heightSegments, parameters.openEnded, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'CircleGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new DodecahedronGeometry(),
					new DodecahedronGeometry( parameters.radius ),
					new DodecahedronGeometry( parameters.radius, parameters.detail ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'CircleBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new DodecahedronBufferGeometry(),
					new DodecahedronBufferGeometry( parameters.radius ),
					new DodecahedronBufferGeometry( parameters.radius, parameters.detail ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	function EdgesGeometry( geometry, thresholdAngle ) {

		BufferGeometry.call( this );

		this.type = 'EdgesGeometry';

		this.parameters = {
			thresholdAngle: thresholdAngle
		};

		thresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;

		// buffer

		var vertices = [];

		// helper variables

		var thresholdDot = Math.cos( _Math.DEG2RAD * thresholdAngle );
		var edge = [ 0, 0 ], edges = {}, edge1, edge2;
		var key, keys = [ 'a', 'b', 'c' ];

		// prepare source geometry

		var geometry2;

		if ( geometry.isBufferGeometry ) {

			geometry2 = new Geometry();
			geometry2.fromBufferGeometry( geometry );

		} else {

			geometry2 = geometry.clone();

		}

		geometry2.mergeVertices();
		geometry2.computeFaceNormals();

		var sourceVertices = geometry2.vertices;
		var faces = geometry2.faces;

		// now create a data structure where each entry represents an edge with its adjoining faces

		for ( var i = 0, l = faces.length; i < l; i ++ ) {

			var face = faces[ i ];

			for ( var j = 0; j < 3; j ++ ) {

				edge1 = face[ keys[ j ] ];
				edge2 = face[ keys[ ( j + 1 ) % 3 ] ];
				edge[ 0 ] = Math.min( edge1, edge2 );
				edge[ 1 ] = Math.max( edge1, edge2 );

				key = edge[ 0 ] + ',' + edge[ 1 ];

				if ( edges[ key ] === undefined ) {

					edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ], face1: i, face2: undefined };

				} else {

					edges[ key ].face2 = i;

				}

			}

		}

		// generate vertices

		for ( key in edges ) {

			var e = edges[ key ];

			// an edge is only rendered if the angle (in degrees) between the face normals of the adjoining faces exceeds this value. default = 1 degree.

			if ( e.face2 === undefined || faces[ e.face1 ].normal.dot( faces[ e.face2 ].normal ) <= thresholdDot ) {

				var vertex = sourceVertices[ e.index1 ];
				vertices.push( vertex.x, vertex.y, vertex.z );

				vertex = sourceVertices[ e.index2 ];
				vertices.push( vertex.x, vertex.y, vertex.z );

			}

		}

		// build geometry

		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );

	}

	EdgesGeometry.prototype = Object.create( BufferGeometry.prototype );
	EdgesGeometry.prototype.constructor = EdgesGeometry;

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function Scene() {

		Object3D.call( this );

		this.type = 'Scene';

		this.background = null;
		this.fog = null;
		this.overrideMaterial = null;

		this.autoUpdate = true; // checked by the renderer

	}

	Scene.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Scene,

		copy: function ( source, recursive ) {

			Object3D.prototype.copy.call( this, source, recursive );

			if ( source.background !== null ) this.background = source.background.clone();
			if ( source.fog !== null ) this.fog = source.fog.clone();
			if ( source.overrideMaterial !== null ) this.overrideMaterial = source.overrideMaterial.clone();

			this.autoUpdate = source.autoUpdate;
			this.matrixAutoUpdate = source.matrixAutoUpdate;

			return this;

		},

		toJSON: function ( meta ) {

			var data = Object3D.prototype.toJSON.call( this, meta );

			if ( this.background !== null ) data.object.background = this.background.toJSON( meta );
			if ( this.fog !== null ) data.object.fog = this.fog.toJSON();

			return data;

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function DataTexture( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {

		Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

		this.image = { data: data, width: width, height: height };

		this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
		this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;

		this.generateMipmaps = false;
		this.flipY = false;
		this.unpackAlignment = 1;

	}

	DataTexture.prototype = Object.create( Texture.prototype );
	DataTexture.prototype.constructor = DataTexture;

	DataTexture.prototype.isDataTexture = true;

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function CubeTexture( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {

		images = images !== undefined ? images : [];
		mapping = mapping !== undefined ? mapping : CubeReflectionMapping;

		Texture.call( this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

		this.flipY = false;

	}

	CubeTexture.prototype = Object.create( Texture.prototype );
	CubeTexture.prototype.constructor = CubeTexture;

	CubeTexture.prototype.isCubeTexture = true;

	Object.defineProperty( CubeTexture.prototype, 'images', {

		get: function () {

			return this.image;

		},

		set: function ( value ) {

			this.image = value;

		}

	} );

	/**
	 * @author tschw
	 *
	 * Uniforms of a program.
	 * Those form a tree structure with a special top-level container for the root,
	 * which you get by calling 'new WebGLUniforms( gl, program, renderer )'.
	 *
	 *
	 * Properties of inner nodes including the top-level container:
	 *
	 * .seq - array of nested uniforms
	 * .map - nested uniforms by name
	 *
	 *
	 * Methods of all nodes except the top-level container:
	 *
	 * .setValue( gl, value, [renderer] )
	 *
	 * 		uploads a uniform value(s)
	 *  	the 'renderer' parameter is needed for sampler uniforms
	 *
	 *
	 * Static methods of the top-level container (renderer factorizations):
	 *
	 * .upload( gl, seq, values, renderer )
	 *
	 * 		sets uniforms in 'seq' to 'values[id].value'
	 *
	 * .seqWithValue( seq, values ) : filteredSeq
	 *
	 * 		filters 'seq' entries with corresponding entry in values
	 *
	 *
	 * Methods of the top-level container (renderer factorizations):
	 *
	 * .setValue( gl, name, value )
	 *
	 * 		sets uniform with  name 'name' to 'value'
	 *
	 * .set( gl, obj, prop )
	 *
	 * 		sets uniform from object and property with same name than uniform
	 *
	 * .setOptional( gl, obj, prop )
	 *
	 * 		like .set for an optional property of the object
	 *
	 */

	var emptyTexture = new Texture();
	var emptyCubeTexture = new CubeTexture();

	// --- Base for inner nodes (including the root) ---

	function UniformContainer() {

		this.seq = [];
		this.map = {};

	}

	// --- Utilities ---

	// Array Caches (provide typed arrays for temporary by size)

	var arrayCacheF32 = [];
	var arrayCacheI32 = [];

	// Float32Array caches used for uploading Matrix uniforms

	var mat4array = new Float32Array( 16 );
	var mat3array = new Float32Array( 9 );

	// Flattening for arrays of vectors and matrices

	function flatten( array, nBlocks, blockSize ) {

		var firstElem = array[ 0 ];

		if ( firstElem <= 0 || firstElem > 0 ) return array;
		// unoptimized: ! isNaN( firstElem )
		// see http://jacksondunstan.com/articles/983

		var n = nBlocks * blockSize,
			r = arrayCacheF32[ n ];

		if ( r === undefined ) {

			r = new Float32Array( n );
			arrayCacheF32[ n ] = r;

		}

		if ( nBlocks !== 0 ) {

			firstElem.toArray( r, 0 );

			for ( var i = 1, offset = 0; i !== nBlocks; ++ i ) {

				offset += blockSize;
				array[ i ].toArray( r, offset );

			}

		}

		return r;

	}

	// Texture unit allocation

	function allocTexUnits( renderer, n ) {

		var r = arrayCacheI32[ n ];

		if ( r === undefined ) {

			r = new Int32Array( n );
			arrayCacheI32[ n ] = r;

		}

		for ( var i = 0; i !== n; ++ i )
			r[ i ] = renderer.allocTextureUnit();

		return r;

	}

	// --- Setters ---

	// Note: Defining these methods externally, because they come in a bunch
	// and this way their names minify.

	// Single scalar

	function setValue1f( gl, v ) {

		gl.uniform1f( this.addr, v );

	}

	function setValue1i( gl, v ) {

		gl.uniform1i( this.addr, v );

	}

	// Single float vector (from flat array or THREE.VectorN)

	function setValue2fv( gl, v ) {

		if ( v.x === undefined ) {

			gl.uniform2fv( this.addr, v );

		} else {

			gl.uniform2f( this.addr, v.x, v.y );

		}

	}

	function setValue3fv( gl, v ) {

		if ( v.x !== undefined ) {

			gl.uniform3f( this.addr, v.x, v.y, v.z );

		} else if ( v.r !== undefined ) {

			gl.uniform3f( this.addr, v.r, v.g, v.b );

		} else {

			gl.uniform3fv( this.addr, v );

		}

	}

	function setValue4fv( gl, v ) {

		if ( v.x === undefined ) {

			gl.uniform4fv( this.addr, v );

		} else {

			 gl.uniform4f( this.addr, v.x, v.y, v.z, v.w );

		}

	}

	// Single matrix (from flat array or MatrixN)

	function setValue2fm( gl, v ) {

		gl.uniformMatrix2fv( this.addr, false, v.elements || v );

	}

	function setValue3fm( gl, v ) {

		if ( v.elements === undefined ) {

			gl.uniformMatrix3fv( this.addr, false, v );

		} else {

			mat3array.set( v.elements );
			gl.uniformMatrix3fv( this.addr, false, mat3array );

		}

	}

	function setValue4fm( gl, v ) {

		if ( v.elements === undefined ) {

			gl.uniformMatrix4fv( this.addr, false, v );

		} else {

			mat4array.set( v.elements );
			gl.uniformMatrix4fv( this.addr, false, mat4array );

		}

	}

	// Single texture (2D / Cube)

	function setValueT1( gl, v, renderer ) {

		var unit = renderer.allocTextureUnit();
		gl.uniform1i( this.addr, unit );
		renderer.setTexture2D( v || emptyTexture, unit );

	}

	function setValueT6( gl, v, renderer ) {

		var unit = renderer.allocTextureUnit();
		gl.uniform1i( this.addr, unit );
		renderer.setTextureCube( v || emptyCubeTexture, unit );

	}

	// Integer / Boolean vectors or arrays thereof (always flat arrays)

	function setValue2iv( gl, v ) {

		gl.uniform2iv( this.addr, v );

	}

	function setValue3iv( gl, v ) {

		gl.uniform3iv( this.addr, v );

	}

	function setValue4iv( gl, v ) {

		gl.uniform4iv( this.addr, v );

	}

	// Helper to pick the right setter for the singular case

	function getSingularSetter( type ) {

		switch ( type ) {

			case 0x1406: return setValue1f; // FLOAT
			case 0x8b50: return setValue2fv; // _VEC2
			case 0x8b51: return setValue3fv; // _VEC3
			case 0x8b52: return setValue4fv; // _VEC4

			case 0x8b5a: return setValue2fm; // _MAT2
			case 0x8b5b: return setValue3fm; // _MAT3
			case 0x8b5c: return setValue4fm; // _MAT4

			case 0x8b5e: case 0x8d66: return setValueT1; // SAMPLER_2D, SAMPLER_EXTERNAL_OES
			case 0x8b60: return setValueT6; // SAMPLER_CUBE

			case 0x1404: case 0x8b56: return setValue1i; // INT, BOOL
			case 0x8b53: case 0x8b57: return setValue2iv; // _VEC2
			case 0x8b54: case 0x8b58: return setValue3iv; // _VEC3
			case 0x8b55: case 0x8b59: return setValue4iv; // _VEC4

		}

	}

	// Array of scalars

	function setValue1fv( gl, v ) {

		gl.uniform1fv( this.addr, v );

	}
	function setValue1iv( gl, v ) {

		gl.uniform1iv( this.addr, v );

	}

	// Array of vectors (flat or from THREE classes)

	function setValueV2a( gl, v ) {

		gl.uniform2fv( this.addr, flatten( v, this.size, 2 ) );

	}

	function setValueV3a( gl, v ) {

		gl.uniform3fv( this.addr, flatten( v, this.size, 3 ) );

	}

	function setValueV4a( gl, v ) {

		gl.uniform4fv( this.addr, flatten( v, this.size, 4 ) );

	}

	// Array of matrices (flat or from THREE clases)

	function setValueM2a( gl, v ) {

		gl.uniformMatrix2fv( this.addr, false, flatten( v, this.size, 4 ) );

	}

	function setValueM3a( gl, v ) {

		gl.uniformMatrix3fv( this.addr, false, flatten( v, this.size, 9 ) );

	}

	function setValueM4a( gl, v ) {

		gl.uniformMatrix4fv( this.addr, false, flatten( v, this.size, 16 ) );

	}

	// Array of textures (2D / Cube)

	function setValueT1a( gl, v, renderer ) {

		var n = v.length,
			units = allocTexUnits( renderer, n );

		gl.uniform1iv( this.addr, units );

		for ( var i = 0; i !== n; ++ i ) {

			renderer.setTexture2D( v[ i ] || emptyTexture, units[ i ] );

		}

	}

	function setValueT6a( gl, v, renderer ) {

		var n = v.length,
			units = allocTexUnits( renderer, n );

		gl.uniform1iv( this.addr, units );

		for ( var i = 0; i !== n; ++ i ) {

			renderer.setTextureCube( v[ i ] || emptyCubeTexture, units[ i ] );

		}

	}

	// Helper to pick the right setter for a pure (bottom-level) array

	function getPureArraySetter( type ) {

		switch ( type ) {

			case 0x1406: return setValue1fv; // FLOAT
			case 0x8b50: return setValueV2a; // _VEC2
			case 0x8b51: return setValueV3a; // _VEC3
			case 0x8b52: return setValueV4a; // _VEC4

			case 0x8b5a: return setValueM2a; // _MAT2
			case 0x8b5b: return setValueM3a; // _MAT3
			case 0x8b5c: return setValueM4a; // _MAT4

			case 0x8b5e: return setValueT1a; // SAMPLER_2D
			case 0x8b60: return setValueT6a; // SAMPLER_CUBE

			case 0x1404: case 0x8b56: return setValue1iv; // INT, BOOL
			case 0x8b53: case 0x8b57: return setValue2iv; // _VEC2
			case 0x8b54: case 0x8b58: return setValue3iv; // _VEC3
			case 0x8b55: case 0x8b59: return setValue4iv; // _VEC4

		}

	}

	// --- Uniform Classes ---

	function SingleUniform( id, activeInfo, addr ) {

		this.id = id;
		this.addr = addr;
		this.setValue = getSingularSetter( activeInfo.type );

		// this.path = activeInfo.name; // DEBUG

	}

	function PureArrayUniform( id, activeInfo, addr ) {

		this.id = id;
		this.addr = addr;
		this.size = activeInfo.size;
		this.setValue = getPureArraySetter( activeInfo.type );

		// this.path = activeInfo.name; // DEBUG

	}

	function StructuredUniform( id ) {

		this.id = id;

		UniformContainer.call( this ); // mix-in

	}

	StructuredUniform.prototype.setValue = function ( gl, value ) {

		// Note: Don't need an extra 'renderer' parameter, since samplers
		// are not allowed in structured uniforms.

		var seq = this.seq;

		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

			var u = seq[ i ];
			u.setValue( gl, value[ u.id ] );

		}

	};

	// --- Top-level ---

	// Parser - builds up the property tree from the path strings

	var RePathPart = /([\w\d_]+)(\])?(\[|\.)?/g;

	// extracts
	// 	- the identifier (member name or array index)
	//  - followed by an optional right bracket (found when array index)
	//  - followed by an optional left bracket or dot (type of subscript)
	//
	// Note: These portions can be read in a non-overlapping fashion and
	// allow straightforward parsing of the hierarchy that WebGL encodes
	// in the uniform names.

	function addUniform( container, uniformObject ) {

		container.seq.push( uniformObject );
		container.map[ uniformObject.id ] = uniformObject;

	}

	function parseUniform( activeInfo, addr, container ) {

		var path = activeInfo.name,
			pathLength = path.length;

		// reset RegExp object, because of the early exit of a previous run
		RePathPart.lastIndex = 0;

		for ( ; ; ) {

			var match = RePathPart.exec( path ),
				matchEnd = RePathPart.lastIndex,

				id = match[ 1 ],
				idIsIndex = match[ 2 ] === ']',
				subscript = match[ 3 ];

			if ( idIsIndex ) id = id | 0; // convert to integer

			if ( subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength ) {

				// bare name or "pure" bottom-level array "[0]" suffix

				addUniform( container, subscript === undefined ?
					new SingleUniform( id, activeInfo, addr ) :
					new PureArrayUniform( id, activeInfo, addr ) );

				break;

			} else {

				// step into inner node / create it in case it doesn't exist

				var map = container.map, next = map[ id ];

				if ( next === undefined ) {

					next = new StructuredUniform( id );
					addUniform( container, next );

				}

				container = next;

			}

		}

	}

	// Root Container

	function WebGLUniforms( gl, program, renderer ) {

		UniformContainer.call( this );

		this.renderer = renderer;

		var n = gl.getProgramParameter( program, gl.ACTIVE_UNIFORMS );

		for ( var i = 0; i < n; ++ i ) {

			var info = gl.getActiveUniform( program, i ),
				path = info.name,
				addr = gl.getUniformLocation( program, path );

			parseUniform( info, addr, this );

		}

	}

	WebGLUniforms.prototype.setValue = function ( gl, name, value ) {

		var u = this.map[ name ];

		if ( u !== undefined ) u.setValue( gl, value, this.renderer );

	};

	WebGLUniforms.prototype.setOptional = function ( gl, object, name ) {

		var v = object[ name ];

		if ( v !== undefined ) this.setValue( gl, name, v );

	};


	// Static interface

	WebGLUniforms.upload = function ( gl, seq, values, renderer ) {

		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

			var u = seq[ i ],
				v = values[ u.id ];

			if ( v.needsUpdate !== false ) {

				// note: always updating when .needsUpdate is undefined
				u.setValue( gl, v.value, renderer );

			}

		}

	};

	WebGLUniforms.seqWithValue = function ( seq, values ) {

		var r = [];

		for ( var i = 0, n = seq.length; i !== n; ++ i ) {

			var u = seq[ i ];
			if ( u.id in values ) r.push( u );

		}

		return r;

	};

	/**
	 * Uniforms library for shared webgl shaders
	 */

	var UniformsLib = {

		common: {

			diffuse: { value: new Color( 0xeeeeee ) },
			opacity: { value: 1.0 },

			map: { value: null },
			uvTransform: { value: new Matrix3() },

			alphaMap: { value: null },

		},

		specularmap: {

			specularMap: { value: null },

		},

		envmap: {

			envMap: { value: null },
			flipEnvMap: { value: - 1 },
			reflectivity: { value: 1.0 },
			refractionRatio: { value: 0.98 }

		},

		aomap: {

			aoMap: { value: null },
			aoMapIntensity: { value: 1 }

		},

		lightmap: {

			lightMap: { value: null },
			lightMapIntensity: { value: 1 }

		},

		emissivemap: {

			emissiveMap: { value: null }

		},

		bumpmap: {

			bumpMap: { value: null },
			bumpScale: { value: 1 }

		},

		normalmap: {

			normalMap: { value: null },
			normalScale: { value: new Vector2( 1, 1 ) }

		},

		displacementmap: {

			displacementMap: { value: null },
			displacementScale: { value: 1 },
			displacementBias: { value: 0 }

		},

		roughnessmap: {

			roughnessMap: { value: null }

		},

		metalnessmap: {

			metalnessMap: { value: null }

		},

		gradientmap: {

			gradientMap: { value: null }

		},

		fog: {

			fogDensity: { value: 0.00025 },
			fogNear: { value: 1 },
			fogFar: { value: 2000 },
			fogColor: { value: new Color( 0xffffff ) }

		},

		lights: {

			ambientLightColor: { value: [] },

			directionalLights: { value: [], properties: {
				direction: {},
				color: {},

				shadow: {},
				shadowBias: {},
				shadowRadius: {},
				shadowMapSize: {}
			} },

			directionalShadowMap: { value: [] },
			directionalShadowMatrix: { value: [] },

			spotLights: { value: [], properties: {
				color: {},
				position: {},
				direction: {},
				distance: {},
				coneCos: {},
				penumbraCos: {},
				decay: {},

				shadow: {},
				shadowBias: {},
				shadowRadius: {},
				shadowMapSize: {}
			} },

			spotShadowMap: { value: [] },
			spotShadowMatrix: { value: [] },

			pointLights: { value: [], properties: {
				color: {},
				position: {},
				decay: {},
				distance: {},

				shadow: {},
				shadowBias: {},
				shadowRadius: {},
				shadowMapSize: {},
				shadowCameraNear: {},
				shadowCameraFar: {}
			} },

			pointShadowMap: { value: [] },
			pointShadowMatrix: { value: [] },

			hemisphereLights: { value: [], properties: {
				direction: {},
				skyColor: {},
				groundColor: {}
			} },

			// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src
			rectAreaLights: { value: [], properties: {
				color: {},
				position: {},
				width: {},
				height: {}
			} }

		},

		points: {

			diffuse: { value: new Color( 0xeeeeee ) },
			opacity: { value: 1.0 },
			size: { value: 1.0 },
			scale: { value: 1.0 },
			map: { value: null },
			uvTransform: { value: new Matrix3() }

		}

	};

	var alphamap_fragment = "#ifdef USE_ALPHAMAP\r\n\r\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\r\n\r\n#endif\r\n";

	var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\r\n\r\n\tuniform sampler2D alphaMap;\r\n\r\n#endif\r\n";

	var alphatest_fragment = "#ifdef ALPHATEST\r\n\r\n\tif ( diffuseColor.a < ALPHATEST ) discard;\r\n\r\n#endif\r\n";

	var aomap_fragment = "#ifdef USE_AOMAP\r\n\r\n\t// reads channel R, compatible with a combined OcclusionRoughnessMetallic (RGB) texture\r\n\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\r\n\r\n\treflectedLight.indirectDiffuse *= ambientOcclusion;\r\n\r\n\t#if defined( USE_ENVMAP ) && defined( PHYSICAL )\r\n\r\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\r\n\r\n\t\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var aomap_pars_fragment = "#ifdef USE_AOMAP\r\n\r\n\tuniform sampler2D aoMap;\r\n\tuniform float aoMapIntensity;\r\n\r\n#endif";

	var begin_vertex = "\r\nvec3 transformed = vec3( position );\r\n";

	var beginnormal_vertex = "\r\nvec3 objectNormal = vec3( normal );\r\n";

	var bsdfs = "float punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\r\n\r\n\tif( decayExponent > 0.0 ) {\r\n\r\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\r\n\r\n\t\t// based upon Frostbite 3 Moving to Physically-based Rendering\r\n\t\t// page 32, equation 26: E[window1]\r\n\t\t// https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\r\n\t\t// this is intended to be used on spot and point lights who are represented as luminous intensity\r\n\t\t// but who must be converted to luminous irradiance for surface lighting calculation\r\n\t\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\r\n\t\tfloat maxDistanceCutoffFactor = pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\r\n\t\treturn distanceFalloff * maxDistanceCutoffFactor;\r\n\r\n#else\r\n\r\n\t\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\r\n\r\n#endif\r\n\r\n\t}\r\n\r\n\treturn 1.0;\r\n\r\n}\r\n\r\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\r\n\r\n\treturn RECIPROCAL_PI * diffuseColor;\r\n\r\n} // validated\r\n\r\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\r\n\r\n\t// Original approximation by Christophe Schlick '94\r\n\t// float fresnel = pow( 1.0 - dotLH, 5.0 );\r\n\r\n\t// Optimized variant (presented by Epic at SIGGRAPH '13)\r\n\t// https://cdn2.unrealengine.com/Resources/files/2013SiggraphPresentationsNotes-26915738.pdf\r\n\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\r\n\r\n\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\r\n\r\n} // validated\r\n\r\n// Microfacet Models for Refraction through Rough Surfaces - equation (34)\r\n// http://graphicrants.blogspot.com/2013/08/specular-brdf-reference.html\r\n// alpha is \"roughness squared\" in Disney’s reparameterization\r\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\r\n\r\n\t// geometry term (normalized) = G(l)⋅G(v) / 4(n⋅l)(n⋅v)\r\n\t// also see #12151\r\n\r\n\tfloat a2 = pow2( alpha );\r\n\r\n\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\r\n\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\r\n\r\n\treturn 1.0 / ( gl * gv );\r\n\r\n} // validated\r\n\r\n// Moving Frostbite to Physically Based Rendering 3.0 - page 12, listing 2\r\n// https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\r\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\r\n\r\n\tfloat a2 = pow2( alpha );\r\n\r\n\t// dotNL and dotNV are explicitly swapped. This is not a mistake.\r\n\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\r\n\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\r\n\r\n\treturn 0.5 / max( gv + gl, EPSILON );\r\n\r\n}\r\n\r\n// Microfacet Models for Refraction through Rough Surfaces - equation (33)\r\n// http://graphicrants.blogspot.com/2013/08/specular-brdf-reference.html\r\n// alpha is \"roughness squared\" in Disney’s reparameterization\r\nfloat D_GGX( const in float alpha, const in float dotNH ) {\r\n\r\n\tfloat a2 = pow2( alpha );\r\n\r\n\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0; // avoid alpha = 0 with dotNH = 1\r\n\r\n\treturn RECIPROCAL_PI * a2 / pow2( denom );\r\n\r\n}\r\n\r\n// GGX Distribution, Schlick Fresnel, GGX-Smith Visibility\r\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {\r\n\r\n\tfloat alpha = pow2( roughness ); // UE4's roughness\r\n\r\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\r\n\r\n\tfloat dotNL = saturate( dot( geometry.normal, incidentLight.direction ) );\r\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\r\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\r\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\r\n\r\n\tvec3 F = F_Schlick( specularColor, dotLH );\r\n\r\n\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\r\n\r\n\tfloat D = D_GGX( alpha, dotNH );\r\n\r\n\treturn F * ( G * D );\r\n\r\n} // validated\r\n\r\n// Rect Area Light\r\n\r\n// Area light computation code adapted from:\r\n// Real-Time Polygonal-Light Shading with Linearly Transformed Cosines\r\n// By: Eric Heitz, Jonathan Dupuy, Stephen Hill and David Neubelt\r\n// https://drive.google.com/file/d/0BzvWIdpUpRx_d09ndGVjNVJzZjA/view\r\n// https://eheitzresearch.wordpress.com/415-2/\r\n// http://blog.selfshadow.com/sandbox/ltc.html\r\n\r\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\r\n\r\n\tconst float LUT_SIZE  = 64.0;\r\n\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\r\n\tconst float LUT_BIAS  = 0.5 / LUT_SIZE;\r\n\r\n\tfloat theta = acos( dot( N, V ) );\r\n\r\n\t// Parameterization of texture:\r\n\t// sqrt(roughness) -> [0,1]\r\n\t// theta -> [0, PI/2]\r\n\tvec2 uv = vec2(\r\n\t\tsqrt( saturate( roughness ) ),\r\n\t\tsaturate( theta / ( 0.5 * PI ) ) );\r\n\r\n\t// Ensure we don't have nonlinearities at the look-up table's edges\r\n\t// see: http://http.developer.nvidia.com/GPUGems2/gpugems2_chapter24.html\r\n\t//      \"Shader Analysis\" section\r\n\tuv = uv * LUT_SCALE + LUT_BIAS;\r\n\r\n\treturn uv;\r\n\r\n}\r\n\r\n// Real-Time Area Lighting: a Journey from Research to Production\r\n// By: Stephen Hill & Eric Heitz\r\n// http://advances.realtimerendering.com/s2016/s2016_ltc_rnd.pdf\r\n// An approximation for the form factor of a clipped rectangle.\r\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\r\n\r\n\tfloat l = length( f );\r\n\r\n\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\r\n\r\n}\r\n\r\n// Real-Time Polygonal-Light Shading with Linearly Transformed Cosines\r\n// also Real-Time Area Lighting: a Journey from Research to Production\r\n// http://advances.realtimerendering.com/s2016/s2016_ltc_rnd.pdf\r\n// Normalization by 2*PI is incorporated in this function itself.\r\n// theta/sin(theta) is approximated by rational polynomial\r\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\r\n\r\n\tfloat x = dot( v1, v2 );\r\n\r\n\tfloat y = abs( x );\r\n\tfloat a = 0.86267 + (0.49788 + 0.01436 * y ) * y;\r\n\tfloat b = 3.45068 + (4.18814 + y) * y;\r\n\tfloat v = a / b;\r\n\r\n\tfloat theta_sintheta = (x > 0.0) ? v : 0.5 * inversesqrt( 1.0 - x * x ) - v;\r\n\r\n\treturn cross( v1, v2 ) * theta_sintheta;\r\n\r\n}\r\n\r\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\r\n\r\n\t// bail if point is on back side of plane of light\r\n\t// assumes ccw winding order of light vertices\r\n\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\r\n\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\r\n\tvec3 lightNormal = cross( v1, v2 );\r\n\r\n\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\r\n\r\n\t// construct orthonormal basis around N\r\n\tvec3 T1, T2;\r\n\tT1 = normalize( V - N * dot( V, N ) );\r\n\tT2 = - cross( N, T1 ); // negated from paper; possibly due to a different assumed handedness of world coordinate system\r\n\r\n\t// compute transform\r\n\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\r\n\r\n\t// transform rect\r\n\tvec3 coords[ 4 ];\r\n\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\r\n\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\r\n\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\r\n\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\r\n\r\n\t// project rect onto sphere\r\n\tcoords[ 0 ] = normalize( coords[ 0 ] );\r\n\tcoords[ 1 ] = normalize( coords[ 1 ] );\r\n\tcoords[ 2 ] = normalize( coords[ 2 ] );\r\n\tcoords[ 3 ] = normalize( coords[ 3 ] );\r\n\r\n\t// calculate vector form factor\r\n\tvec3 vectorFormFactor = vec3( 0.0 );\r\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\r\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\r\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\r\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\r\n\r\n\t// adjust for horizon clipping\r\n\tvec3 result = vec3( LTC_ClippedSphereFormFactor( vectorFormFactor ) );\r\n\r\n\treturn result;\r\n\r\n}\r\n\r\n// End Rect Area Light\r\n\r\n// ref: https://www.unrealengine.com/blog/physically-based-shading-on-mobile - environmentBRDF for GGX on mobile\r\nvec3 BRDF_Specular_GGX_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {\r\n\r\n\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\r\n\r\n\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\r\n\r\n\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\r\n\r\n\tvec4 r = roughness * c0 + c1;\r\n\r\n\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\r\n\r\n\tvec2 AB = vec2( -1.04, 1.04 ) * a004 + r.zw;\r\n\r\n\treturn specularColor * AB.x + AB.y;\r\n\r\n} // validated\r\n\r\n\r\nfloat G_BlinnPhong_Implicit( ) {\r\n\r\n\t// geometry term is (n dot l)(n dot v) / 4(n dot l)(n dot v)\r\n\treturn 0.25;\r\n\r\n}\r\n\r\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\r\n\r\n\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\r\n\r\n}\r\n\r\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\r\n\r\n\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\r\n\r\n\t//float dotNL = saturate( dot( geometry.normal, incidentLight.direction ) );\r\n\t//float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\r\n\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\r\n\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\r\n\r\n\tvec3 F = F_Schlick( specularColor, dotLH );\r\n\r\n\tfloat G = G_BlinnPhong_Implicit( );\r\n\r\n\tfloat D = D_BlinnPhong( shininess, dotNH );\r\n\r\n\treturn F * ( G * D );\r\n\r\n} // validated\r\n\r\n// source: http://simonstechblog.blogspot.ca/2011/12/microfacet-brdf.html\r\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\r\n\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\r\n}\r\n\r\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\r\n\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\r\n}\r\n";

	var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\r\n\r\n\tuniform sampler2D bumpMap;\r\n\tuniform float bumpScale;\r\n\r\n\t// Derivative maps - bump mapping unparametrized surfaces by Morten Mikkelsen\r\n\t// http://mmikkelsen3d.blogspot.sk/2011/07/derivative-maps.html\r\n\r\n\t// Evaluate the derivative of the height w.r.t. screen-space using forward differencing (listing 2)\r\n\r\n\tvec2 dHdxy_fwd() {\r\n\r\n\t\tvec2 dSTdx = dFdx( vUv );\r\n\t\tvec2 dSTdy = dFdy( vUv );\r\n\r\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\r\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\r\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\r\n\r\n\t\treturn vec2( dBx, dBy );\r\n\r\n\t}\r\n\r\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\r\n\r\n\t\t// Workaround for Adreno 3XX dFd*( vec3 ) bug. See #9988\r\n\r\n\t\tvec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\r\n\t\tvec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\r\n\t\tvec3 vN = surf_norm;\t\t// normalized\r\n\r\n\t\tvec3 R1 = cross( vSigmaY, vN );\r\n\t\tvec3 R2 = cross( vN, vSigmaX );\r\n\r\n\t\tfloat fDet = dot( vSigmaX, R1 );\r\n\r\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\r\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\r\n\r\n\t}\r\n\r\n#endif\r\n";

	var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\r\n\r\n\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; ++ i ) {\r\n\r\n\t\tvec4 plane = clippingPlanes[ i ];\r\n\t\tif ( dot( vViewPosition, plane.xyz ) > plane.w ) discard;\r\n\r\n\t}\r\n\t\t\r\n\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\r\n\r\n\t\tbool clipped = true;\r\n\t\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; ++ i ) {\r\n\t\t\tvec4 plane = clippingPlanes[ i ];\r\n\t\t\tclipped = ( dot( vViewPosition, plane.xyz ) > plane.w ) && clipped;\r\n\t\t}\r\n\r\n\t\tif ( clipped ) discard;\r\n\t\r\n\t#endif\r\n\r\n#endif\r\n";

	var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\r\n\r\n\t#if ! defined( PHYSICAL ) && ! defined( PHONG )\r\n\t\tvarying vec3 vViewPosition;\r\n\t#endif\r\n\r\n\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\r\n\r\n#endif\r\n";

	var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0 && ! defined( PHYSICAL ) && ! defined( PHONG )\r\n\tvarying vec3 vViewPosition;\r\n#endif\r\n";

	var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0 && ! defined( PHYSICAL ) && ! defined( PHONG )\r\n\tvViewPosition = - mvPosition.xyz;\r\n#endif\r\n\r\n";

	var color_fragment = "#ifdef USE_COLOR\r\n\r\n\tdiffuseColor.rgb *= vColor;\r\n\r\n#endif";

	var color_pars_fragment = "#ifdef USE_COLOR\r\n\r\n\tvarying vec3 vColor;\r\n\r\n#endif\r\n";

	var color_pars_vertex = "#ifdef USE_COLOR\r\n\r\n\tvarying vec3 vColor;\r\n\r\n#endif";

	var color_vertex = "#ifdef USE_COLOR\r\n\r\n\tvColor.xyz = color.xyz;\r\n\r\n#endif";

	var common = "#define PI 3.14159265359\r\n#define PI2 6.28318530718\r\n#define PI_HALF 1.5707963267949\r\n#define RECIPROCAL_PI 0.31830988618\r\n#define RECIPROCAL_PI2 0.15915494\r\n#define LOG2 1.442695\r\n#define EPSILON 1e-6\r\n\r\n#define saturate(a) clamp( a, 0.0, 1.0 )\r\n#define whiteCompliment(a) ( 1.0 - saturate( a ) )\r\n\r\nfloat pow2( const in float x ) { return x*x; }\r\nfloat pow3( const in float x ) { return x*x*x; }\r\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\r\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\r\n// expects values in the range of [0,1]x[0,1], returns values in the [0,1] range.\r\n// do not collapse into a single function per: http://byteblacksmith.com/improvements-to-the-canonical-one-liner-glsl-rand-for-opengl-es-2-0/\r\nhighp float rand( const in vec2 uv ) {\r\n\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\r\n\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\r\n\treturn fract(sin(sn) * c);\r\n}\r\n\r\nstruct IncidentLight {\r\n\tvec3 color;\r\n\tvec3 direction;\r\n\tbool visible;\r\n};\r\n\r\nstruct ReflectedLight {\r\n\tvec3 directDiffuse;\r\n\tvec3 directSpecular;\r\n\tvec3 indirectDiffuse;\r\n\tvec3 indirectSpecular;\r\n};\r\n\r\nstruct GeometricContext {\r\n\tvec3 position;\r\n\tvec3 normal;\r\n\tvec3 viewDir;\r\n};\r\n\r\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\r\n\r\n\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\r\n\r\n}\r\n\r\n// http://en.wikibooks.org/wiki/GLSL_Programming/Applying_Matrix_Transformations\r\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\r\n\r\n\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\r\n\r\n}\r\n\r\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\r\n\r\n\tfloat distance = dot( planeNormal, point - pointOnPlane );\r\n\r\n\treturn - distance * planeNormal + point;\r\n\r\n}\r\n\r\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\r\n\r\n\treturn sign( dot( point - pointOnPlane, planeNormal ) );\r\n\r\n}\r\n\r\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\r\n\r\n\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\r\n\r\n}\r\n\r\nmat3 transposeMat3( const in mat3 m ) {\r\n\r\n\tmat3 tmp;\r\n\r\n\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\r\n\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\r\n\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\r\n\r\n\treturn tmp;\r\n\r\n}\r\n\r\n// https://en.wikipedia.org/wiki/Relative_luminance\r\nfloat linearToRelativeLuminance( const in vec3 color ) {\r\n\r\n\tvec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\r\n\r\n\treturn dot( weights, color.rgb );\r\n\r\n}\r\n";

	var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\r\n\r\n#define cubeUV_textureSize (1024.0)\r\n\r\nint getFaceFromDirection(vec3 direction) {\r\n\tvec3 absDirection = abs(direction);\r\n\tint face = -1;\r\n\tif( absDirection.x > absDirection.z ) {\r\n\t\tif(absDirection.x > absDirection.y )\r\n\t\t\tface = direction.x > 0.0 ? 0 : 3;\r\n\t\telse\r\n\t\t\tface = direction.y > 0.0 ? 1 : 4;\r\n\t}\r\n\telse {\r\n\t\tif(absDirection.z > absDirection.y )\r\n\t\t\tface = direction.z > 0.0 ? 2 : 5;\r\n\t\telse\r\n\t\t\tface = direction.y > 0.0 ? 1 : 4;\r\n\t}\r\n\treturn face;\r\n}\r\n#define cubeUV_maxLods1  (log2(cubeUV_textureSize*0.25) - 1.0)\r\n#define cubeUV_rangeClamp (exp2((6.0 - 1.0) * 2.0))\r\n\r\nvec2 MipLevelInfo( vec3 vec, float roughnessLevel, float roughness ) {\r\n\tfloat scale = exp2(cubeUV_maxLods1 - roughnessLevel);\r\n\tfloat dxRoughness = dFdx(roughness);\r\n\tfloat dyRoughness = dFdy(roughness);\r\n\tvec3 dx = dFdx( vec * scale * dxRoughness );\r\n\tvec3 dy = dFdy( vec * scale * dyRoughness );\r\n\tfloat d = max( dot( dx, dx ), dot( dy, dy ) );\r\n\t// Clamp the value to the max mip level counts. hard coded to 6 mips\r\n\td = clamp(d, 1.0, cubeUV_rangeClamp);\r\n\tfloat mipLevel = 0.5 * log2(d);\r\n\treturn vec2(floor(mipLevel), fract(mipLevel));\r\n}\r\n\r\n#define cubeUV_maxLods2 (log2(cubeUV_textureSize*0.25) - 2.0)\r\n#define cubeUV_rcpTextureSize (1.0 / cubeUV_textureSize)\r\n\r\nvec2 getCubeUV(vec3 direction, float roughnessLevel, float mipLevel) {\r\n\tmipLevel = roughnessLevel > cubeUV_maxLods2 - 3.0 ? 0.0 : mipLevel;\r\n\tfloat a = 16.0 * cubeUV_rcpTextureSize;\r\n\r\n\tvec2 exp2_packed = exp2( vec2( roughnessLevel, mipLevel ) );\r\n\tvec2 rcp_exp2_packed = vec2( 1.0 ) / exp2_packed;\r\n\t// float powScale = exp2(roughnessLevel + mipLevel);\r\n\tfloat powScale = exp2_packed.x * exp2_packed.y;\r\n\t// float scale =  1.0 / exp2(roughnessLevel + 2.0 + mipLevel);\r\n\tfloat scale = rcp_exp2_packed.x * rcp_exp2_packed.y * 0.25;\r\n\t// float mipOffset = 0.75*(1.0 - 1.0/exp2(mipLevel))/exp2(roughnessLevel);\r\n\tfloat mipOffset = 0.75*(1.0 - rcp_exp2_packed.y) * rcp_exp2_packed.x;\r\n\r\n\tbool bRes = mipLevel == 0.0;\r\n\tscale =  bRes && (scale < a) ? a : scale;\r\n\r\n\tvec3 r;\r\n\tvec2 offset;\r\n\tint face = getFaceFromDirection(direction);\r\n\r\n\tfloat rcpPowScale = 1.0 / powScale;\r\n\r\n\tif( face == 0) {\r\n\t\tr = vec3(direction.x, -direction.z, direction.y);\r\n\t\toffset = vec2(0.0+mipOffset,0.75 * rcpPowScale);\r\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? a : offset.y;\r\n\t}\r\n\telse if( face == 1) {\r\n\t\tr = vec3(direction.y, direction.x, direction.z);\r\n\t\toffset = vec2(scale+mipOffset, 0.75 * rcpPowScale);\r\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? a : offset.y;\r\n\t}\r\n\telse if( face == 2) {\r\n\t\tr = vec3(direction.z, direction.x, direction.y);\r\n\t\toffset = vec2(2.0*scale+mipOffset, 0.75 * rcpPowScale);\r\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? a : offset.y;\r\n\t}\r\n\telse if( face == 3) {\r\n\t\tr = vec3(direction.x, direction.z, direction.y);\r\n\t\toffset = vec2(0.0+mipOffset,0.5 * rcpPowScale);\r\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? 0.0 : offset.y;\r\n\t}\r\n\telse if( face == 4) {\r\n\t\tr = vec3(direction.y, direction.x, -direction.z);\r\n\t\toffset = vec2(scale+mipOffset, 0.5 * rcpPowScale);\r\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? 0.0 : offset.y;\r\n\t}\r\n\telse {\r\n\t\tr = vec3(direction.z, -direction.x, direction.y);\r\n\t\toffset = vec2(2.0*scale+mipOffset, 0.5 * rcpPowScale);\r\n\t\toffset.y = bRes && (offset.y < 2.0*a) ? 0.0 : offset.y;\r\n\t}\r\n\tr = normalize(r);\r\n\tfloat texelOffset = 0.5 * cubeUV_rcpTextureSize;\r\n\tvec2 s = ( r.yz / abs( r.x ) + vec2( 1.0 ) ) * 0.5;\r\n\tvec2 base = offset + vec2( texelOffset );\r\n\treturn base + s * ( scale - 2.0 * texelOffset );\r\n}\r\n\r\n#define cubeUV_maxLods3 (log2(cubeUV_textureSize*0.25) - 3.0)\r\n\r\nvec4 textureCubeUV(vec3 reflectedDirection, float roughness ) {\r\n\tfloat roughnessVal = roughness* cubeUV_maxLods3;\r\n\tfloat r1 = floor(roughnessVal);\r\n\tfloat r2 = r1 + 1.0;\r\n\tfloat t = fract(roughnessVal);\r\n\tvec2 mipInfo = MipLevelInfo(reflectedDirection, r1, roughness);\r\n\tfloat s = mipInfo.y;\r\n\tfloat level0 = mipInfo.x;\r\n\tfloat level1 = level0 + 1.0;\r\n\tlevel1 = level1 > 5.0 ? 5.0 : level1;\r\n\r\n\t// round to nearest mipmap if we are not interpolating.\r\n\tlevel0 += min( floor( s + 0.5 ), 5.0 );\r\n\r\n\t// Tri linear interpolation.\r\n\tvec2 uv_10 = getCubeUV(reflectedDirection, r1, level0);\r\n\tvec4 color10 = envMapTexelToLinear(texture2D(envMap, uv_10));\r\n\r\n\tvec2 uv_20 = getCubeUV(reflectedDirection, r2, level0);\r\n\tvec4 color20 = envMapTexelToLinear(texture2D(envMap, uv_20));\r\n\r\n\tvec4 result = mix(color10, color20, t);\r\n\r\n\treturn vec4(result.rgb, 1.0);\r\n}\r\n\r\n#endif\r\n";

	var defaultnormal_vertex = "vec3 transformedNormal = normalMatrix * objectNormal;\r\n\r\n#ifdef FLIP_SIDED\r\n\r\n\ttransformedNormal = - transformedNormal;\r\n\r\n#endif\r\n";

	var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\r\n\r\n\tuniform sampler2D displacementMap;\r\n\tuniform float displacementScale;\r\n\tuniform float displacementBias;\r\n\r\n#endif\r\n";

	var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\r\n\r\n\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, uv ).x * displacementScale + displacementBias );\r\n\r\n#endif\r\n";

	var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\r\n\r\n\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\r\n\r\n\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\r\n\r\n\ttotalEmissiveRadiance *= emissiveColor.rgb;\r\n\r\n#endif\r\n";

	var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\r\n\r\n\tuniform sampler2D emissiveMap;\r\n\r\n#endif\r\n";

	var encodings_fragment = "  gl_FragColor = linearToOutputTexel( gl_FragColor );\r\n";

	var encodings_pars_fragment = "// For a discussion of what this is, please read this: http://lousodrome.net/blog/light/2013/05/26/gamma-correct-and-hdr-rendering-in-a-32-bits-buffer/\r\n\r\nvec4 LinearToLinear( in vec4 value ) {\r\n\treturn value;\r\n}\r\n\r\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\r\n\treturn vec4( pow( value.xyz, vec3( gammaFactor ) ), value.w );\r\n}\r\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\r\n\treturn vec4( pow( value.xyz, vec3( 1.0 / gammaFactor ) ), value.w );\r\n}\r\n\r\nvec4 sRGBToLinear( in vec4 value ) {\r\n\treturn vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.w );\r\n}\r\nvec4 LinearTosRGB( in vec4 value ) {\r\n\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.w );\r\n}\r\n\r\nvec4 RGBEToLinear( in vec4 value ) {\r\n\treturn vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\r\n}\r\nvec4 LinearToRGBE( in vec4 value ) {\r\n\tfloat maxComponent = max( max( value.r, value.g ), value.b );\r\n\tfloat fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\r\n\treturn vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\r\n//  return vec4( value.brg, ( 3.0 + 128.0 ) / 256.0 );\r\n}\r\n\r\n// reference: http://iwasbeingirony.blogspot.ca/2010/06/difference-between-rgbm-and-rgbd.html\r\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\r\n\treturn vec4( value.xyz * value.w * maxRange, 1.0 );\r\n}\r\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\r\n\tfloat maxRGB = max( value.x, max( value.g, value.b ) );\r\n\tfloat M      = clamp( maxRGB / maxRange, 0.0, 1.0 );\r\n\tM            = ceil( M * 255.0 ) / 255.0;\r\n\treturn vec4( value.rgb / ( M * maxRange ), M );\r\n}\r\n\r\n// reference: http://iwasbeingirony.blogspot.ca/2010/06/difference-between-rgbm-and-rgbd.html\r\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\r\n\treturn vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\r\n}\r\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\r\n\tfloat maxRGB = max( value.x, max( value.g, value.b ) );\r\n\tfloat D      = max( maxRange / maxRGB, 1.0 );\r\n\tD            = min( floor( D ) / 255.0, 1.0 );\r\n\treturn vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\r\n}\r\n\r\n// LogLuv reference: http://graphicrants.blogspot.ca/2009/04/rgbm-color-encoding.html\r\n\r\n// M matrix, for encoding\r\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\r\nvec4 LinearToLogLuv( in vec4 value )  {\r\n\tvec3 Xp_Y_XYZp = value.rgb * cLogLuvM;\r\n\tXp_Y_XYZp = max(Xp_Y_XYZp, vec3(1e-6, 1e-6, 1e-6));\r\n\tvec4 vResult;\r\n\tvResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\r\n\tfloat Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\r\n\tvResult.w = fract(Le);\r\n\tvResult.z = (Le - (floor(vResult.w*255.0))/255.0)/255.0;\r\n\treturn vResult;\r\n}\r\n\r\n// Inverse M matrix, for decoding\r\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\r\nvec4 LogLuvToLinear( in vec4 value ) {\r\n\tfloat Le = value.z * 255.0 + value.w;\r\n\tvec3 Xp_Y_XYZp;\r\n\tXp_Y_XYZp.y = exp2((Le - 127.0) / 2.0);\r\n\tXp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\r\n\tXp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\r\n\tvec3 vRGB = Xp_Y_XYZp.rgb * cLogLuvInverseM;\r\n\treturn vec4( max(vRGB, 0.0), 1.0 );\r\n}\r\n";

	var envmap_fragment = "#ifdef USE_ENVMAP\r\n\r\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\r\n\r\n\t\tvec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );\r\n\r\n\t\t// Transforming Normal Vectors with the Inverse Transformation\r\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\r\n\r\n\t\t#ifdef ENVMAP_MODE_REFLECTION\r\n\r\n\t\t\tvec3 reflectVec = reflect( cameraToVertex, worldNormal );\r\n\r\n\t\t#else\r\n\r\n\t\t\tvec3 reflectVec = refract( cameraToVertex, worldNormal, refractionRatio );\r\n\r\n\t\t#endif\r\n\r\n\t#else\r\n\r\n\t\tvec3 reflectVec = vReflect;\r\n\r\n\t#endif\r\n\r\n\t#ifdef ENVMAP_TYPE_CUBE\r\n\r\n\t\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\r\n\r\n\t#elif defined( ENVMAP_TYPE_EQUIREC )\r\n\r\n\t\tvec2 sampleUV;\r\n\r\n\t\treflectVec = normalize( reflectVec );\r\n\r\n\t\tsampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\r\n\r\n\t\tsampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\r\n\r\n\t\tvec4 envColor = texture2D( envMap, sampleUV );\r\n\r\n\t#elif defined( ENVMAP_TYPE_SPHERE )\r\n\r\n\t\treflectVec = normalize( reflectVec );\r\n\r\n\t\tvec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) );\r\n\r\n\t\tvec4 envColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5 );\r\n\r\n\t#else\r\n\r\n\t\tvec4 envColor = vec4( 0.0 );\r\n\r\n\t#endif\r\n\r\n\tenvColor = envMapTexelToLinear( envColor );\r\n\r\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\r\n\r\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\r\n\r\n\t#elif defined( ENVMAP_BLENDING_MIX )\r\n\r\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\r\n\r\n\t#elif defined( ENVMAP_BLENDING_ADD )\r\n\r\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var envmap_pars_fragment = "#if defined( USE_ENVMAP ) || defined( PHYSICAL )\r\n\tuniform float reflectivity;\r\n\tuniform float envMapIntensity;\r\n#endif\r\n\r\n#ifdef USE_ENVMAP\r\n\r\n\t#if ! defined( PHYSICAL ) && ( defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) )\r\n\t\tvarying vec3 vWorldPosition;\r\n\t#endif\r\n\r\n\t#ifdef ENVMAP_TYPE_CUBE\r\n\t\tuniform samplerCube envMap;\r\n\t#else\r\n\t\tuniform sampler2D envMap;\r\n\t#endif\r\n\tuniform float flipEnvMap;\r\n\r\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( PHYSICAL )\r\n\t\tuniform float refractionRatio;\r\n\t#else\r\n\t\tvarying vec3 vReflect;\r\n\t#endif\r\n\r\n#endif\r\n";

	var envmap_pars_vertex = "#ifdef USE_ENVMAP\r\n\r\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\r\n\t\tvarying vec3 vWorldPosition;\r\n\r\n\t#else\r\n\r\n\t\tvarying vec3 vReflect;\r\n\t\tuniform float refractionRatio;\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var envmap_vertex = "#ifdef USE_ENVMAP\r\n\r\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\r\n\r\n\t\tvWorldPosition = worldPosition.xyz;\r\n\r\n\t#else\r\n\r\n\t\tvec3 cameraToVertex = normalize( worldPosition.xyz - cameraPosition );\r\n\r\n\t\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\r\n\r\n\t\t#ifdef ENVMAP_MODE_REFLECTION\r\n\r\n\t\t\tvReflect = reflect( cameraToVertex, worldNormal );\r\n\r\n\t\t#else\r\n\r\n\t\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\r\n\r\n\t\t#endif\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var fog_vertex = "\r\n#ifdef USE_FOG\r\nfogDepth = -mvPosition.z;\r\n#endif";

	var fog_pars_vertex = "#ifdef USE_FOG\r\n\r\n  varying float fogDepth;\r\n\r\n#endif\r\n";

	var fog_fragment = "#ifdef USE_FOG\r\n\r\n\t#ifdef FOG_EXP2\r\n\r\n\t\tfloat fogFactor = whiteCompliment( exp2( - fogDensity * fogDensity * fogDepth * fogDepth * LOG2 ) );\r\n\r\n\t#else\r\n\r\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, fogDepth );\r\n\r\n\t#endif\r\n\r\n\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\r\n\r\n#endif\r\n";

	var fog_pars_fragment = "#ifdef USE_FOG\r\n\r\n\tuniform vec3 fogColor;\r\n\tvarying float fogDepth;\r\n\r\n\t#ifdef FOG_EXP2\r\n\r\n\t\tuniform float fogDensity;\r\n\r\n\t#else\r\n\r\n\t\tuniform float fogNear;\r\n\t\tuniform float fogFar;\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var gradientmap_pars_fragment = "#ifdef TOON\r\n\r\n\tuniform sampler2D gradientMap;\r\n\r\n\tvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\r\n\r\n\t\t// dotNL will be from -1.0 to 1.0\r\n\t\tfloat dotNL = dot( normal, lightDirection );\r\n\t\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\r\n\r\n\t\t#ifdef USE_GRADIENTMAP\r\n\r\n\t\t\treturn texture2D( gradientMap, coord ).rgb;\r\n\r\n\t\t#else\r\n\r\n\t\t\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\r\n\r\n\t\t#endif\r\n\r\n\r\n\t}\r\n\r\n#endif\r\n";

	var lightmap_fragment = "#ifdef USE_LIGHTMAP\r\n\r\n\treflectedLight.indirectDiffuse += PI * texture2D( lightMap, vUv2 ).xyz * lightMapIntensity; // factor of PI should not be present; included here to prevent breakage\r\n\r\n#endif\r\n";

	var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\r\n\r\n\tuniform sampler2D lightMap;\r\n\tuniform float lightMapIntensity;\r\n\r\n#endif";

	var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\r\n\r\nGeometricContext geometry;\r\ngeometry.position = mvPosition.xyz;\r\ngeometry.normal = normalize( transformedNormal );\r\ngeometry.viewDir = normalize( -mvPosition.xyz );\r\n\r\nGeometricContext backGeometry;\r\nbackGeometry.position = geometry.position;\r\nbackGeometry.normal = -geometry.normal;\r\nbackGeometry.viewDir = geometry.viewDir;\r\n\r\nvLightFront = vec3( 0.0 );\r\n\r\n#ifdef DOUBLE_SIDED\r\n\tvLightBack = vec3( 0.0 );\r\n#endif\r\n\r\nIncidentLight directLight;\r\nfloat dotNL;\r\nvec3 directLightColor_Diffuse;\r\n\r\n#if NUM_POINT_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\r\n\r\n\t\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\r\n\r\n\t\tdotNL = dot( geometry.normal, directLight.direction );\r\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\r\n\r\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\r\n\r\n\t\t#ifdef DOUBLE_SIDED\r\n\r\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\r\n\r\n\t\t#endif\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n#if NUM_SPOT_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\r\n\r\n\t\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\r\n\r\n\t\tdotNL = dot( geometry.normal, directLight.direction );\r\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\r\n\r\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\r\n\r\n\t\t#ifdef DOUBLE_SIDED\r\n\r\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\r\n\r\n\t\t#endif\r\n\t}\r\n\r\n#endif\r\n\r\n\r\n\r\n#if NUM_DIR_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\r\n\r\n\t\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\r\n\r\n\t\tdotNL = dot( geometry.normal, directLight.direction );\r\n\t\tdirectLightColor_Diffuse = PI * directLight.color;\r\n\r\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\r\n\r\n\t\t#ifdef DOUBLE_SIDED\r\n\r\n\t\t\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\r\n\r\n\t\t#endif\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n#if NUM_HEMI_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\r\n\r\n\t\tvLightFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\r\n\r\n\t\t#ifdef DOUBLE_SIDED\r\n\r\n\t\t\tvLightBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\r\n\r\n\t\t#endif\r\n\r\n\t}\r\n\r\n#endif\r\n";

	var lights_pars = "uniform vec3 ambientLightColor;\r\n\r\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\r\n\r\n\tvec3 irradiance = ambientLightColor;\r\n\r\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\r\n\r\n\t\tirradiance *= PI;\r\n\r\n\t#endif\r\n\r\n\treturn irradiance;\r\n\r\n}\r\n\r\n#if NUM_DIR_LIGHTS > 0\r\n\r\n\tstruct DirectionalLight {\r\n\t\tvec3 direction;\r\n\t\tvec3 color;\r\n\r\n\t\tint shadow;\r\n\t\tfloat shadowBias;\r\n\t\tfloat shadowRadius;\r\n\t\tvec2 shadowMapSize;\r\n\t};\r\n\r\n\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\r\n\r\n\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\r\n\r\n\t\tdirectLight.color = directionalLight.color;\r\n\t\tdirectLight.direction = directionalLight.direction;\r\n\t\tdirectLight.visible = true;\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n\r\n#if NUM_POINT_LIGHTS > 0\r\n\r\n\tstruct PointLight {\r\n\t\tvec3 position;\r\n\t\tvec3 color;\r\n\t\tfloat distance;\r\n\t\tfloat decay;\r\n\r\n\t\tint shadow;\r\n\t\tfloat shadowBias;\r\n\t\tfloat shadowRadius;\r\n\t\tvec2 shadowMapSize;\r\n\t\tfloat shadowCameraNear;\r\n\t\tfloat shadowCameraFar;\r\n\t};\r\n\r\n\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\r\n\r\n\t// directLight is an out parameter as having it as a return value caused compiler errors on some devices\r\n\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\r\n\r\n\t\tvec3 lVector = pointLight.position - geometry.position;\r\n\t\tdirectLight.direction = normalize( lVector );\r\n\r\n\t\tfloat lightDistance = length( lVector );\r\n\r\n\t\tdirectLight.color = pointLight.color;\r\n\t\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\r\n\t\tdirectLight.visible = ( directLight.color != vec3( 0.0 ) );\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n\r\n#if NUM_SPOT_LIGHTS > 0\r\n\r\n\tstruct SpotLight {\r\n\t\tvec3 position;\r\n\t\tvec3 direction;\r\n\t\tvec3 color;\r\n\t\tfloat distance;\r\n\t\tfloat decay;\r\n\t\tfloat coneCos;\r\n\t\tfloat penumbraCos;\r\n\r\n\t\tint shadow;\r\n\t\tfloat shadowBias;\r\n\t\tfloat shadowRadius;\r\n\t\tvec2 shadowMapSize;\r\n\t};\r\n\r\n\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\r\n\r\n\t// directLight is an out parameter as having it as a return value caused compiler errors on some devices\r\n\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight  ) {\r\n\r\n\t\tvec3 lVector = spotLight.position - geometry.position;\r\n\t\tdirectLight.direction = normalize( lVector );\r\n\r\n\t\tfloat lightDistance = length( lVector );\r\n\t\tfloat angleCos = dot( directLight.direction, spotLight.direction );\r\n\r\n\t\tif ( angleCos > spotLight.coneCos ) {\r\n\r\n\t\t\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\r\n\r\n\t\t\tdirectLight.color = spotLight.color;\r\n\t\t\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\r\n\t\t\tdirectLight.visible = true;\r\n\r\n\t\t} else {\r\n\r\n\t\t\tdirectLight.color = vec3( 0.0 );\r\n\t\t\tdirectLight.visible = false;\r\n\r\n\t\t}\r\n\t}\r\n\r\n#endif\r\n\r\n\r\n#if NUM_RECT_AREA_LIGHTS > 0\r\n\r\n\tstruct RectAreaLight {\r\n\t\tvec3 color;\r\n\t\tvec3 position;\r\n\t\tvec3 halfWidth;\r\n\t\tvec3 halfHeight;\r\n\t};\r\n\r\n\t// Pre-computed values of LinearTransformedCosine approximation of BRDF\r\n\t// BRDF approximation Texture is 64x64\r\n\tuniform sampler2D ltcMat; // RGBA Float\r\n\tuniform sampler2D ltcMag; // Alpha Float (only has w component)\r\n\r\n\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\r\n\r\n#endif\r\n\r\n\r\n#if NUM_HEMI_LIGHTS > 0\r\n\r\n\tstruct HemisphereLight {\r\n\t\tvec3 direction;\r\n\t\tvec3 skyColor;\r\n\t\tvec3 groundColor;\r\n\t};\r\n\r\n\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\r\n\r\n\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\r\n\r\n\t\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\r\n\t\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\r\n\r\n\t\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\r\n\r\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\r\n\r\n\t\t\tirradiance *= PI;\r\n\r\n\t\t#endif\r\n\r\n\t\treturn irradiance;\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n\r\n#if defined( USE_ENVMAP ) && defined( PHYSICAL )\r\n\r\n\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\r\n\r\n\t\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\r\n\r\n\t\t#ifdef ENVMAP_TYPE_CUBE\r\n\r\n\t\t\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\r\n\r\n\t\t\t// TODO: replace with properly filtered cubemaps and access the irradiance LOD level, be it the last LOD level\r\n\t\t\t// of a specular cubemap, or just the default level of a specially created irradiance cubemap.\r\n\r\n\t\t\t#ifdef TEXTURE_LOD_EXT\r\n\r\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\r\n\r\n\t\t\t#else\r\n\r\n\t\t\t\t// force the bias high to get the last LOD level as it is the most blurred.\r\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\r\n\r\n\t\t\t#endif\r\n\r\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\r\n\r\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\r\n\r\n\t\t\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\r\n\t\t\tvec4 envMapColor = textureCubeUV( queryVec, 1.0 );\r\n\r\n\t\t#else\r\n\r\n\t\t\tvec4 envMapColor = vec4( 0.0 );\r\n\r\n\t\t#endif\r\n\r\n\t\treturn PI * envMapColor.rgb * envMapIntensity;\r\n\r\n\t}\r\n\r\n\t// taken from here: http://casual-effects.blogspot.ca/2011/08/plausible-environment-lighting-in-two.html\r\n\tfloat getSpecularMIPLevel( const in float blinnShininessExponent, const in int maxMIPLevel ) {\r\n\r\n\t\t//float envMapWidth = pow( 2.0, maxMIPLevelScalar );\r\n\t\t//float desiredMIPLevel = log2( envMapWidth * sqrt( 3.0 ) ) - 0.5 * log2( pow2( blinnShininessExponent ) + 1.0 );\r\n\r\n\t\tfloat maxMIPLevelScalar = float( maxMIPLevel );\r\n\t\tfloat desiredMIPLevel = maxMIPLevelScalar + 0.79248 - 0.5 * log2( pow2( blinnShininessExponent ) + 1.0 );\r\n\r\n\t\t// clamp to allowable LOD ranges.\r\n\t\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\r\n\r\n\t}\r\n\r\n\tvec3 getLightProbeIndirectRadiance( const in GeometricContext geometry, const in float blinnShininessExponent, const in int maxMIPLevel ) {\r\n\r\n\t\t#ifdef ENVMAP_MODE_REFLECTION\r\n\r\n\t\t\tvec3 reflectVec = reflect( -geometry.viewDir, geometry.normal );\r\n\r\n\t\t#else\r\n\r\n\t\t\tvec3 reflectVec = refract( -geometry.viewDir, geometry.normal, refractionRatio );\r\n\r\n\t\t#endif\r\n\r\n\t\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\r\n\r\n\t\tfloat specularMIPLevel = getSpecularMIPLevel( blinnShininessExponent, maxMIPLevel );\r\n\r\n\t\t#ifdef ENVMAP_TYPE_CUBE\r\n\r\n\t\t\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\r\n\r\n\t\t\t#ifdef TEXTURE_LOD_EXT\r\n\r\n\t\t\t\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\r\n\r\n\t\t\t#else\r\n\r\n\t\t\t\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\r\n\r\n\t\t\t#endif\r\n\r\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\r\n\r\n\t\t#elif defined( ENVMAP_TYPE_CUBE_UV )\r\n\r\n\t\t\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\r\n\t\t\tvec4 envMapColor = textureCubeUV(queryReflectVec, BlinnExponentToGGXRoughness(blinnShininessExponent));\r\n\r\n\t\t#elif defined( ENVMAP_TYPE_EQUIREC )\r\n\r\n\t\t\tvec2 sampleUV;\r\n\t\t\tsampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\r\n\t\t\tsampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\r\n\r\n\t\t\t#ifdef TEXTURE_LOD_EXT\r\n\r\n\t\t\t\tvec4 envMapColor = texture2DLodEXT( envMap, sampleUV, specularMIPLevel );\r\n\r\n\t\t\t#else\r\n\r\n\t\t\t\tvec4 envMapColor = texture2D( envMap, sampleUV, specularMIPLevel );\r\n\r\n\t\t\t#endif\r\n\r\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\r\n\r\n\t\t#elif defined( ENVMAP_TYPE_SPHERE )\r\n\r\n\t\t\tvec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0,0.0,1.0 ) );\r\n\r\n\t\t\t#ifdef TEXTURE_LOD_EXT\r\n\r\n\t\t\t\tvec4 envMapColor = texture2DLodEXT( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\r\n\r\n\t\t\t#else\r\n\r\n\t\t\t\tvec4 envMapColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\r\n\r\n\t\t\t#endif\r\n\r\n\t\t\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\r\n\r\n\t\t#endif\r\n\r\n\t\treturn envMapColor.rgb * envMapIntensity;\r\n\r\n\t}\r\n\r\n#endif\r\n";

	var lights_phong_fragment = "BlinnPhongMaterial material;\r\nmaterial.diffuseColor = diffuseColor.rgb;\r\nmaterial.specularColor = specular;\r\nmaterial.specularShininess = shininess;\r\nmaterial.specularStrength = specularStrength;\r\n";

	var lights_phong_pars_fragment = "varying vec3 vViewPosition;\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n\r\nstruct BlinnPhongMaterial {\r\n\r\n\tvec3\tdiffuseColor;\r\n\tvec3\tspecularColor;\r\n\tfloat\tspecularShininess;\r\n\tfloat\tspecularStrength;\r\n\r\n};\r\n\r\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\r\n\r\n\t#ifdef TOON\r\n\r\n\t\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\r\n\r\n\t#else\r\n\r\n\t\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\r\n\t\tvec3 irradiance = dotNL * directLight.color;\r\n\r\n\t#endif\r\n\r\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\r\n\r\n\t\tirradiance *= PI; // punctual light\r\n\r\n\t#endif\r\n\r\n\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\r\n\r\n\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\r\n\r\n}\r\n\r\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\r\n\r\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\r\n\r\n}\r\n\r\n#define RE_Direct\t\t\t\tRE_Direct_BlinnPhong\r\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_BlinnPhong\r\n\r\n#define Material_LightProbeLOD( material )\t(0)\r\n";

	var lights_physical_fragment = "PhysicalMaterial material;\r\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\r\nmaterial.specularRoughness = clamp( roughnessFactor, 0.04, 1.0 );\r\n#ifdef STANDARD\r\n\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\r\n#else\r\n\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\r\n\tmaterial.clearCoat = saturate( clearCoat ); // Burley clearcoat model\r\n\tmaterial.clearCoatRoughness = clamp( clearCoatRoughness, 0.04, 1.0 );\r\n#endif\r\n";

	var lights_physical_pars_fragment = "struct PhysicalMaterial {\r\n\r\n\tvec3\tdiffuseColor;\r\n\tfloat\tspecularRoughness;\r\n\tvec3\tspecularColor;\r\n\r\n\t#ifndef STANDARD\r\n\t\tfloat clearCoat;\r\n\t\tfloat clearCoatRoughness;\r\n\t#endif\r\n\r\n};\r\n\r\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\r\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\r\n\r\n// Clear coat directional hemishperical reflectance (this approximation should be improved)\r\nfloat clearCoatDHRApprox( const in float roughness, const in float dotNL ) {\r\n\r\n\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\r\n\r\n}\r\n\r\n#if NUM_RECT_AREA_LIGHTS > 0\r\n\r\n\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\r\n\r\n\t\tvec3 normal = geometry.normal;\r\n\t\tvec3 viewDir = geometry.viewDir;\r\n\t\tvec3 position = geometry.position;\r\n\t\tvec3 lightPos = rectAreaLight.position;\r\n\t\tvec3 halfWidth = rectAreaLight.halfWidth;\r\n\t\tvec3 halfHeight = rectAreaLight.halfHeight;\r\n\t\tvec3 lightColor = rectAreaLight.color;\r\n\t\tfloat roughness = material.specularRoughness;\r\n\r\n\t\tvec3 rectCoords[ 4 ];\r\n\t\trectCoords[ 0 ] = lightPos - halfWidth - halfHeight; // counterclockwise\r\n\t\trectCoords[ 1 ] = lightPos + halfWidth - halfHeight;\r\n\t\trectCoords[ 2 ] = lightPos + halfWidth + halfHeight;\r\n\t\trectCoords[ 3 ] = lightPos - halfWidth + halfHeight;\r\n\r\n\t\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\r\n\r\n\t\tfloat norm = texture2D( ltcMag, uv ).a;\r\n\r\n\t\tvec4 t = texture2D( ltcMat, uv );\r\n\r\n\t\tmat3 mInv = mat3(\r\n\t\t\tvec3(   1,   0, t.y ),\r\n\t\t\tvec3(   0, t.z,   0 ),\r\n\t\t\tvec3( t.w,   0, t.x )\r\n\t\t);\r\n\r\n\t\treflectedLight.directSpecular += lightColor * material.specularColor * norm * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords ); // no fresnel\r\n\r\n\t\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1 ), rectCoords );\r\n\r\n\t}\r\n\r\n#endif\r\n\r\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\r\n\r\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\r\n\r\n\tvec3 irradiance = dotNL * directLight.color;\r\n\r\n\t#ifndef PHYSICALLY_CORRECT_LIGHTS\r\n\r\n\t\tirradiance *= PI; // punctual light\r\n\r\n\t#endif\r\n\r\n\t#ifndef STANDARD\r\n\t\tfloat clearCoatDHR = material.clearCoat * clearCoatDHRApprox( material.clearCoatRoughness, dotNL );\r\n\t#else\r\n\t\tfloat clearCoatDHR = 0.0;\r\n\t#endif\r\n\r\n\treflectedLight.directSpecular += ( 1.0 - clearCoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry, material.specularColor, material.specularRoughness );\r\n\r\n\treflectedLight.directDiffuse += ( 1.0 - clearCoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\r\n\r\n\t#ifndef STANDARD\r\n\r\n\t\treflectedLight.directSpecular += irradiance * material.clearCoat * BRDF_Specular_GGX( directLight, geometry, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearCoatRoughness );\r\n\r\n\t#endif\r\n\r\n}\r\n\r\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\r\n\r\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\r\n\r\n}\r\n\r\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 clearCoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\r\n\r\n\t#ifndef STANDARD\r\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\r\n\t\tfloat dotNL = dotNV;\r\n\t\tfloat clearCoatDHR = material.clearCoat * clearCoatDHRApprox( material.clearCoatRoughness, dotNL );\r\n\t#else\r\n\t\tfloat clearCoatDHR = 0.0;\r\n\t#endif\r\n\r\n\treflectedLight.indirectSpecular += ( 1.0 - clearCoatDHR ) * radiance * BRDF_Specular_GGX_Environment( geometry, material.specularColor, material.specularRoughness );\r\n\r\n\t#ifndef STANDARD\r\n\r\n\t\treflectedLight.indirectSpecular += clearCoatRadiance * material.clearCoat * BRDF_Specular_GGX_Environment( geometry, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearCoatRoughness );\r\n\r\n\t#endif\r\n\r\n}\r\n\r\n#define RE_Direct\t\t\t\tRE_Direct_Physical\r\n#define RE_Direct_RectArea\t\tRE_Direct_RectArea_Physical\r\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Physical\r\n#define RE_IndirectSpecular\t\tRE_IndirectSpecular_Physical\r\n\r\n#define Material_BlinnShininessExponent( material )   GGXRoughnessToBlinnExponent( material.specularRoughness )\r\n#define Material_ClearCoat_BlinnShininessExponent( material )   GGXRoughnessToBlinnExponent( material.clearCoatRoughness )\r\n\r\n// ref: https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\r\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\r\n\r\n\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\r\n\r\n}\r\n";

	var lights_template = "\r\n\r\nGeometricContext geometry;\r\n\r\ngeometry.position = - vViewPosition;\r\ngeometry.normal = normal;\r\ngeometry.viewDir = normalize( vViewPosition );\r\n\r\nIncidentLight directLight;\r\n\r\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\r\n\r\n\tPointLight pointLight;\r\n\r\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\r\n\r\n\t\tpointLight = pointLights[ i ];\r\n\r\n\t\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\r\n\r\n\t\t#ifdef USE_SHADOWMAP\r\n\t\tdirectLight.color *= all( bvec2( pointLight.shadow, directLight.visible ) ) ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\r\n\t\t#endif\r\n\r\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\r\n\r\n\tSpotLight spotLight;\r\n\r\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\r\n\r\n\t\tspotLight = spotLights[ i ];\r\n\r\n\t\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\r\n\r\n\t\t#ifdef USE_SHADOWMAP\r\n\t\tdirectLight.color *= all( bvec2( spotLight.shadow, directLight.visible ) ) ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\r\n\t\t#endif\r\n\r\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\r\n\r\n\tDirectionalLight directionalLight;\r\n\r\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\r\n\r\n\t\tdirectionalLight = directionalLights[ i ];\r\n\r\n\t\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\r\n\r\n\t\t#ifdef USE_SHADOWMAP\r\n\t\tdirectLight.color *= all( bvec2( directionalLight.shadow, directLight.visible ) ) ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\r\n\t\t#endif\r\n\r\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\r\n\r\n\tRectAreaLight rectAreaLight;\r\n\r\n\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\r\n\r\n\t\trectAreaLight = rectAreaLights[ i ];\r\n\t\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\r\n\r\n\t}\r\n\r\n#endif\r\n\r\n#if defined( RE_IndirectDiffuse )\r\n\r\n\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\r\n\r\n\t#ifdef USE_LIGHTMAP\r\n\r\n\t\tvec3 lightMapIrradiance = texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\r\n\r\n\t\t#ifndef PHYSICALLY_CORRECT_LIGHTS\r\n\r\n\t\t\tlightMapIrradiance *= PI; // factor of PI should not be present; included here to prevent breakage\r\n\r\n\t\t#endif\r\n\r\n\t\tirradiance += lightMapIrradiance;\r\n\r\n\t#endif\r\n\r\n\t#if ( NUM_HEMI_LIGHTS > 0 )\r\n\r\n\t\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\r\n\r\n\t\t\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\r\n\r\n\t\t}\r\n\r\n\t#endif\r\n\r\n\t#if defined( USE_ENVMAP ) && defined( PHYSICAL ) && defined( ENVMAP_TYPE_CUBE_UV )\r\n\r\n\t\t// TODO, replace 8 with the real maxMIPLevel\r\n\t\tirradiance += getLightProbeIndirectIrradiance( geometry, 8 );\r\n\r\n\t#endif\r\n\r\n\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\r\n\r\n#endif\r\n\r\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\r\n\r\n\t// TODO, replace 8 with the real maxMIPLevel\r\n\tvec3 radiance = getLightProbeIndirectRadiance( geometry, Material_BlinnShininessExponent( material ), 8 );\r\n\r\n\t#ifndef STANDARD\r\n\t\tvec3 clearCoatRadiance = getLightProbeIndirectRadiance( geometry, Material_ClearCoat_BlinnShininessExponent( material ), 8 );\r\n\t#else\r\n\t\tvec3 clearCoatRadiance = vec3( 0.0 );\r\n\t#endif\r\n\r\n\tRE_IndirectSpecular( radiance, clearCoatRadiance, geometry, material, reflectedLight );\r\n\r\n#endif\r\n";

	var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\r\n\r\n\tgl_FragDepthEXT = log2( vFragDepth ) * logDepthBufFC * 0.5;\r\n\r\n#endif";

	var logdepthbuf_pars_fragment = "#ifdef USE_LOGDEPTHBUF\r\n\r\n\tuniform float logDepthBufFC;\r\n\r\n\t#ifdef USE_LOGDEPTHBUF_EXT\r\n\r\n\t\tvarying float vFragDepth;\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\r\n\r\n\t#ifdef USE_LOGDEPTHBUF_EXT\r\n\r\n\t\tvarying float vFragDepth;\r\n\r\n\t#endif\r\n\r\n\tuniform float logDepthBufFC;\r\n\r\n#endif";

	var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\r\n\r\n\t#ifdef USE_LOGDEPTHBUF_EXT\r\n\r\n\t\tvFragDepth = 1.0 + gl_Position.w;\r\n\r\n\t#else\r\n\r\n\t\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\r\n\r\n\t\tgl_Position.z *= gl_Position.w;\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var map_fragment = "#ifdef USE_MAP\r\n\r\n\tvec4 texelColor = texture2D( map, vUv );\r\n\r\n\ttexelColor = mapTexelToLinear( texelColor );\r\n\tdiffuseColor *= texelColor;\r\n\r\n#endif\r\n";

	var map_pars_fragment = "#ifdef USE_MAP\r\n\r\n\tuniform sampler2D map;\r\n\r\n#endif\r\n";

	var map_particle_fragment = "#ifdef USE_MAP\r\n\r\n\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\r\n\tvec4 mapTexel = texture2D( map, uv );\r\n\tdiffuseColor *= mapTexelToLinear( mapTexel );\r\n\r\n#endif\r\n";

	var map_particle_pars_fragment = "#ifdef USE_MAP\r\n\r\n\tuniform mat3 uvTransform;\r\n\tuniform sampler2D map;\r\n\r\n#endif\r\n";

	var metalnessmap_fragment = "float metalnessFactor = metalness;\r\n\r\n#ifdef USE_METALNESSMAP\r\n\r\n\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\r\n\r\n\t// reads channel B, compatible with a combined OcclusionRoughnessMetallic (RGB) texture\r\n\tmetalnessFactor *= texelMetalness.b;\r\n\r\n#endif\r\n";

	var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\r\n\r\n\tuniform sampler2D metalnessMap;\r\n\r\n#endif";

	var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\r\n\r\n\tobjectNormal += ( morphNormal0 - normal ) * morphTargetInfluences[ 0 ];\r\n\tobjectNormal += ( morphNormal1 - normal ) * morphTargetInfluences[ 1 ];\r\n\tobjectNormal += ( morphNormal2 - normal ) * morphTargetInfluences[ 2 ];\r\n\tobjectNormal += ( morphNormal3 - normal ) * morphTargetInfluences[ 3 ];\r\n\r\n#endif\r\n";

	var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\r\n\r\n\t#ifndef USE_MORPHNORMALS\r\n\r\n\tuniform float morphTargetInfluences[ 8 ];\r\n\r\n\t#else\r\n\r\n\tuniform float morphTargetInfluences[ 4 ];\r\n\r\n\t#endif\r\n\r\n#endif";

	var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\r\n\r\n\ttransformed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];\r\n\ttransformed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];\r\n\ttransformed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];\r\n\ttransformed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];\r\n\r\n\t#ifndef USE_MORPHNORMALS\r\n\r\n\ttransformed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];\r\n\ttransformed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];\r\n\ttransformed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];\r\n\ttransformed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var normal_fragment = "#ifdef FLAT_SHADED\r\n\r\n\t// Workaround for Adreno/Nexus5 not able able to do dFdx( vViewPosition ) ...\r\n\r\n\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\r\n\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\r\n\tvec3 normal = normalize( cross( fdx, fdy ) );\r\n\r\n#else\r\n\r\n\tvec3 normal = normalize( vNormal );\r\n\r\n\t#ifdef DOUBLE_SIDED\r\n\r\n\t\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\r\n\r\n\t#endif\r\n\r\n#endif\r\n\r\n#ifdef USE_NORMALMAP\r\n\r\n\tnormal = perturbNormal2Arb( -vViewPosition, normal );\r\n\r\n#elif defined( USE_BUMPMAP )\r\n\r\n\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\r\n\r\n#endif\r\n";

	var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\r\n\r\n\tuniform sampler2D normalMap;\r\n\tuniform vec2 normalScale;\r\n\r\n\t// Per-Pixel Tangent Space Normal Mapping\r\n\t// http://hacksoflife.blogspot.ch/2009/11/per-pixel-tangent-space-normal-mapping.html\r\n\r\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {\r\n\r\n\t\t// Workaround for Adreno 3XX dFd*( vec3 ) bug. See #9988\r\n\r\n\t\tvec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\r\n\t\tvec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\r\n\t\tvec2 st0 = dFdx( vUv.st );\r\n\t\tvec2 st1 = dFdy( vUv.st );\r\n\r\n\t\tvec3 S = normalize( q0 * st1.t - q1 * st0.t );\r\n\t\tvec3 T = normalize( -q0 * st1.s + q1 * st0.s );\r\n\t\tvec3 N = normalize( surf_norm );\r\n\r\n\t\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\r\n\t\tmapN.xy = normalScale * mapN.xy;\r\n\t\tmat3 tsn = mat3( S, T, N );\r\n\t\treturn normalize( tsn * mapN );\r\n\r\n\t}\r\n\r\n#endif\r\n";

	var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\r\n\treturn normalize( normal ) * 0.5 + 0.5;\r\n}\r\n\r\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\r\n\treturn 2.0 * rgb.xyz - 1.0;\r\n}\r\n\r\nconst float PackUpscale = 256. / 255.; // fraction -> 0..1 (including 1)\r\nconst float UnpackDownscale = 255. / 256.; // 0..1 -> fraction (excluding 1)\r\n\r\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256.,  256. );\r\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\r\n\r\nconst float ShiftRight8 = 1. / 256.;\r\n\r\nvec4 packDepthToRGBA( const in float v ) {\r\n\tvec4 r = vec4( fract( v * PackFactors ), v );\r\n\tr.yzw -= r.xyz * ShiftRight8; // tidy overflow\r\n\treturn r * PackUpscale;\r\n}\r\n\r\nfloat unpackRGBAToDepth( const in vec4 v ) {\r\n\treturn dot( v, UnpackFactors );\r\n}\r\n\r\n// NOTE: viewZ/eyeZ is < 0 when in front of the camera per OpenGL conventions\r\n\r\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\r\n\treturn ( viewZ + near ) / ( near - far );\r\n}\r\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\r\n\treturn linearClipZ * ( near - far ) - near;\r\n}\r\n\r\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\r\n\treturn (( near + viewZ ) * far ) / (( far - near ) * viewZ );\r\n}\r\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\r\n\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\r\n}\r\n";

	var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\r\n\r\n\t// Get get normal blending with premultipled, use with CustomBlending, OneFactor, OneMinusSrcAlphaFactor, AddEquation.\r\n\tgl_FragColor.rgb *= gl_FragColor.a;\r\n\r\n#endif\r\n";

	var project_vertex = "vec4 mvPosition = modelViewMatrix * vec4( transformed, 1.0 );\r\n\r\ngl_Position = projectionMatrix * mvPosition;\r\n";

	var dithering_fragment = "#if defined( DITHERING )\r\n\r\n  gl_FragColor.rgb = dithering( gl_FragColor.rgb );\r\n\r\n#endif\r\n";

	var dithering_pars_fragment = "#if defined( DITHERING )\r\n\r\n\t// based on https://www.shadertoy.com/view/MslGR8\r\n\tvec3 dithering( vec3 color ) {\r\n\t\t//Calculate grid position\r\n\t\tfloat grid_position = rand( gl_FragCoord.xy );\r\n\r\n\t\t//Shift the individual colors differently, thus making it even harder to see the dithering pattern\r\n\t\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\r\n\r\n\t\t//modify shift acording to grid position.\r\n\t\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\r\n\r\n\t\t//shift the color by dither_shift\r\n\t\treturn color + dither_shift_RGB;\r\n\t}\r\n\r\n#endif\r\n";

	var roughnessmap_fragment = "float roughnessFactor = roughness;\r\n\r\n#ifdef USE_ROUGHNESSMAP\r\n\r\n\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\r\n\r\n\t// reads channel G, compatible with a combined OcclusionRoughnessMetallic (RGB) texture\r\n\troughnessFactor *= texelRoughness.g;\r\n\r\n#endif\r\n";

	var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\r\n\r\n\tuniform sampler2D roughnessMap;\r\n\r\n#endif";

	var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\r\n\r\n\t#if NUM_DIR_LIGHTS > 0\r\n\r\n\t\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHTS ];\r\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHTS ];\r\n\r\n\t#endif\r\n\r\n\t#if NUM_SPOT_LIGHTS > 0\r\n\r\n\t\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHTS ];\r\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHTS ];\r\n\r\n\t#endif\r\n\r\n\t#if NUM_POINT_LIGHTS > 0\r\n\r\n\t\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHTS ];\r\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHTS ];\r\n\r\n\t#endif\r\n\r\n\r\n\r\n\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\r\n\r\n\t\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\r\n\r\n\t}\r\n\r\n\tfloat texture2DShadowLerp( sampler2D depths, vec2 size, vec2 uv, float compare ) {\r\n\r\n\t\tconst vec2 offset = vec2( 0.0, 1.0 );\r\n\r\n\t\tvec2 texelSize = vec2( 1.0 ) / size;\r\n\t\tvec2 centroidUV = floor( uv * size + 0.5 ) / size;\r\n\r\n\t\tfloat lb = texture2DCompare( depths, centroidUV + texelSize * offset.xx, compare );\r\n\t\tfloat lt = texture2DCompare( depths, centroidUV + texelSize * offset.xy, compare );\r\n\t\tfloat rb = texture2DCompare( depths, centroidUV + texelSize * offset.yx, compare );\r\n\t\tfloat rt = texture2DCompare( depths, centroidUV + texelSize * offset.yy, compare );\r\n\r\n\t\tvec2 f = fract( uv * size + 0.5 );\r\n\r\n\t\tfloat a = mix( lb, lt, f.y );\r\n\t\tfloat b = mix( rb, rt, f.y );\r\n\t\tfloat c = mix( a, b, f.x );\r\n\r\n\t\treturn c;\r\n\r\n\t}\r\n\r\n\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\r\n\r\n\t\tfloat shadow = 1.0;\r\n\r\n\t\tshadowCoord.xyz /= shadowCoord.w;\r\n\t\tshadowCoord.z += shadowBias;\r\n\r\n\t\t// if ( something && something ) breaks ATI OpenGL shader compiler\r\n\t\t// if ( all( something, something ) ) using this instead\r\n\r\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\r\n\t\tbool inFrustum = all( inFrustumVec );\r\n\r\n\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\r\n\r\n\t\tbool frustumTest = all( frustumTestVec );\r\n\r\n\t\tif ( frustumTest ) {\r\n\r\n\t\t#if defined( SHADOWMAP_TYPE_PCF )\r\n\r\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\r\n\r\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\r\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\r\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\r\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\r\n\r\n\t\t\tshadow = (\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\r\n\t\t\t) * ( 1.0 / 9.0 );\r\n\r\n\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\r\n\r\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\r\n\r\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\r\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\r\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\r\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\r\n\r\n\t\t\tshadow = (\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy, shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\r\n\t\t\t\ttexture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\r\n\t\t\t) * ( 1.0 / 9.0 );\r\n\r\n\t\t#else // no percentage-closer filtering:\r\n\r\n\t\t\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\r\n\r\n\t\t#endif\r\n\r\n\t\t}\r\n\r\n\t\treturn shadow;\r\n\r\n\t}\r\n\r\n\t// cubeToUV() maps a 3D direction vector suitable for cube texture mapping to a 2D\r\n\t// vector suitable for 2D texture mapping. This code uses the following layout for the\r\n\t// 2D texture:\r\n\t//\r\n\t// xzXZ\r\n\t//  y Y\r\n\t//\r\n\t// Y - Positive y direction\r\n\t// y - Negative y direction\r\n\t// X - Positive x direction\r\n\t// x - Negative x direction\r\n\t// Z - Positive z direction\r\n\t// z - Negative z direction\r\n\t//\r\n\t// Source and test bed:\r\n\t// https://gist.github.com/tschw/da10c43c467ce8afd0c4\r\n\r\n\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\r\n\r\n\t\t// Number of texels to avoid at the edge of each square\r\n\r\n\t\tvec3 absV = abs( v );\r\n\r\n\t\t// Intersect unit cube\r\n\r\n\t\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\r\n\t\tabsV *= scaleToCube;\r\n\r\n\t\t// Apply scale to avoid seams\r\n\r\n\t\t// two texels less per square (one texel will do for NEAREST)\r\n\t\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\r\n\r\n\t\t// Unwrap\r\n\r\n\t\t// space: -1 ... 1 range for each square\r\n\t\t//\r\n\t\t// #X##\t\tdim    := ( 4 , 2 )\r\n\t\t//  # #\t\tcenter := ( 1 , 1 )\r\n\r\n\t\tvec2 planar = v.xy;\r\n\r\n\t\tfloat almostATexel = 1.5 * texelSizeY;\r\n\t\tfloat almostOne = 1.0 - almostATexel;\r\n\r\n\t\tif ( absV.z >= almostOne ) {\r\n\r\n\t\t\tif ( v.z > 0.0 )\r\n\t\t\t\tplanar.x = 4.0 - v.x;\r\n\r\n\t\t} else if ( absV.x >= almostOne ) {\r\n\r\n\t\t\tfloat signX = sign( v.x );\r\n\t\t\tplanar.x = v.z * signX + 2.0 * signX;\r\n\r\n\t\t} else if ( absV.y >= almostOne ) {\r\n\r\n\t\t\tfloat signY = sign( v.y );\r\n\t\t\tplanar.x = v.x + 2.0 * signY + 2.0;\r\n\t\t\tplanar.y = v.z * signY - 2.0;\r\n\r\n\t\t}\r\n\r\n\t\t// Transform to UV space\r\n\r\n\t\t// scale := 0.5 / dim\r\n\t\t// translate := ( center + 0.5 ) / dim\r\n\t\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\r\n\r\n\t}\r\n\r\n\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\r\n\r\n\t\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\r\n\r\n\t\t// for point lights, the uniform @vShadowCoord is re-purposed to hold\r\n\t\t// the vector from the light to the world-space position of the fragment.\r\n\t\tvec3 lightToPosition = shadowCoord.xyz;\r\n\r\n\t\t// dp = normalized distance from light to fragment position\r\n\t\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear ); // need to clamp?\r\n\t\tdp += shadowBias;\r\n\r\n\t\t// bd3D = base direction 3D\r\n\t\tvec3 bd3D = normalize( lightToPosition );\r\n\r\n\t\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT )\r\n\r\n\t\t\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\r\n\r\n\t\t\treturn (\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\r\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\r\n\t\t\t) * ( 1.0 / 9.0 );\r\n\r\n\t\t#else // no percentage-closer filtering\r\n\r\n\t\t\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\r\n\r\n\t\t#endif\r\n\r\n\t}\r\n\r\n#endif\r\n";

	var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\r\n\r\n\t#if NUM_DIR_LIGHTS > 0\r\n\r\n\t\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHTS ];\r\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHTS ];\r\n\r\n\t#endif\r\n\r\n\t#if NUM_SPOT_LIGHTS > 0\r\n\r\n\t\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHTS ];\r\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHTS ];\r\n\r\n\t#endif\r\n\r\n\t#if NUM_POINT_LIGHTS > 0\r\n\r\n\t\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHTS ];\r\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHTS ];\r\n\r\n\t#endif\r\n\r\n\r\n\r\n#endif\r\n";

	var shadowmap_vertex = "#ifdef USE_SHADOWMAP\r\n\r\n\t#if NUM_DIR_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\r\n\r\n\t\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * worldPosition;\r\n\r\n\t}\r\n\r\n\t#endif\r\n\r\n\t#if NUM_SPOT_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\r\n\r\n\t\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * worldPosition;\r\n\r\n\t}\r\n\r\n\t#endif\r\n\r\n\t#if NUM_POINT_LIGHTS > 0\r\n\r\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\r\n\r\n\t\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * worldPosition;\r\n\r\n\t}\r\n\r\n\t#endif\r\n\r\n\r\n\r\n#endif\r\n";

	var shadowmask_pars_fragment = "float getShadowMask() {\r\n\r\n\tfloat shadow = 1.0;\r\n\r\n\t#ifdef USE_SHADOWMAP\r\n\r\n\t#if NUM_DIR_LIGHTS > 0\r\n\r\n\tDirectionalLight directionalLight;\r\n\r\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\r\n\r\n\t\tdirectionalLight = directionalLights[ i ];\r\n\t\tshadow *= bool( directionalLight.shadow ) ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\r\n\r\n\t}\r\n\r\n\t#endif\r\n\r\n\t#if NUM_SPOT_LIGHTS > 0\r\n\r\n\tSpotLight spotLight;\r\n\r\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\r\n\r\n\t\tspotLight = spotLights[ i ];\r\n\t\tshadow *= bool( spotLight.shadow ) ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\r\n\r\n\t}\r\n\r\n\t#endif\r\n\r\n\t#if NUM_POINT_LIGHTS > 0\r\n\r\n\tPointLight pointLight;\r\n\r\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\r\n\r\n\t\tpointLight = pointLights[ i ];\r\n\t\tshadow *= bool( pointLight.shadow ) ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\r\n\r\n\t}\r\n\r\n\t#endif\r\n\r\n\r\n\r\n\t#endif\r\n\r\n\treturn shadow;\r\n\r\n}\r\n";

	var skinbase_vertex = "#ifdef USE_SKINNING\r\n\r\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\r\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\r\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\r\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\r\n\r\n#endif";

	var skinning_pars_vertex = "#ifdef USE_SKINNING\r\n\r\n\tuniform mat4 bindMatrix;\r\n\tuniform mat4 bindMatrixInverse;\r\n\r\n\t#ifdef BONE_TEXTURE\r\n\r\n\t\tuniform sampler2D boneTexture;\r\n\t\tuniform int boneTextureSize;\r\n\r\n\t\tmat4 getBoneMatrix( const in float i ) {\r\n\r\n\t\t\tfloat j = i * 4.0;\r\n\t\t\tfloat x = mod( j, float( boneTextureSize ) );\r\n\t\t\tfloat y = floor( j / float( boneTextureSize ) );\r\n\r\n\t\t\tfloat dx = 1.0 / float( boneTextureSize );\r\n\t\t\tfloat dy = 1.0 / float( boneTextureSize );\r\n\r\n\t\t\ty = dy * ( y + 0.5 );\r\n\r\n\t\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\r\n\t\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\r\n\t\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\r\n\t\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\r\n\r\n\t\t\tmat4 bone = mat4( v1, v2, v3, v4 );\r\n\r\n\t\t\treturn bone;\r\n\r\n\t\t}\r\n\r\n\t#else\r\n\r\n\t\tuniform mat4 boneMatrices[ MAX_BONES ];\r\n\r\n\t\tmat4 getBoneMatrix( const in float i ) {\r\n\r\n\t\t\tmat4 bone = boneMatrices[ int(i) ];\r\n\t\t\treturn bone;\r\n\r\n\t\t}\r\n\r\n\t#endif\r\n\r\n#endif\r\n";

	var skinning_vertex = "#ifdef USE_SKINNING\r\n\r\n\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\r\n\r\n\tvec4 skinned = vec4( 0.0 );\r\n\tskinned += boneMatX * skinVertex * skinWeight.x;\r\n\tskinned += boneMatY * skinVertex * skinWeight.y;\r\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\r\n\tskinned += boneMatW * skinVertex * skinWeight.w;\r\n\r\n\ttransformed = ( bindMatrixInverse * skinned ).xyz;\r\n\r\n#endif\r\n";

	var skinnormal_vertex = "#ifdef USE_SKINNING\r\n\r\n\tmat4 skinMatrix = mat4( 0.0 );\r\n\tskinMatrix += skinWeight.x * boneMatX;\r\n\tskinMatrix += skinWeight.y * boneMatY;\r\n\tskinMatrix += skinWeight.z * boneMatZ;\r\n\tskinMatrix += skinWeight.w * boneMatW;\r\n\tskinMatrix  = bindMatrixInverse * skinMatrix * bindMatrix;\r\n\r\n\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\r\n\r\n#endif\r\n";

	var specularmap_fragment = "float specularStrength;\r\n\r\n#ifdef USE_SPECULARMAP\r\n\r\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\r\n\tspecularStrength = texelSpecular.r;\r\n\r\n#else\r\n\r\n\tspecularStrength = 1.0;\r\n\r\n#endif";

	var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\r\n\r\n\tuniform sampler2D specularMap;\r\n\r\n#endif";

	var tonemapping_fragment = "#if defined( TONE_MAPPING )\r\n\r\n  gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\r\n\r\n#endif\r\n";

	var tonemapping_pars_fragment = "#ifndef saturate\r\n\t#define saturate(a) clamp( a, 0.0, 1.0 )\r\n#endif\r\n\r\nuniform float toneMappingExposure;\r\nuniform float toneMappingWhitePoint;\r\n\r\n// exposure only\r\nvec3 LinearToneMapping( vec3 color ) {\r\n\r\n\treturn toneMappingExposure * color;\r\n\r\n}\r\n\r\n// source: https://www.cs.utah.edu/~reinhard/cdrom/\r\nvec3 ReinhardToneMapping( vec3 color ) {\r\n\r\n\tcolor *= toneMappingExposure;\r\n\treturn saturate( color / ( vec3( 1.0 ) + color ) );\r\n\r\n}\r\n\r\n// source: http://filmicgames.com/archives/75\r\n#define Uncharted2Helper( x ) max( ( ( x * ( 0.15 * x + 0.10 * 0.50 ) + 0.20 * 0.02 ) / ( x * ( 0.15 * x + 0.50 ) + 0.20 * 0.30 ) ) - 0.02 / 0.30, vec3( 0.0 ) )\r\nvec3 Uncharted2ToneMapping( vec3 color ) {\r\n\r\n\t// John Hable's filmic operator from Uncharted 2 video game\r\n\tcolor *= toneMappingExposure;\r\n\treturn saturate( Uncharted2Helper( color ) / Uncharted2Helper( vec3( toneMappingWhitePoint ) ) );\r\n\r\n}\r\n\r\n// source: http://filmicgames.com/archives/75\r\nvec3 OptimizedCineonToneMapping( vec3 color ) {\r\n\r\n\t// optimized filmic operator by Jim Hejl and Richard Burgess-Dawson\r\n\tcolor *= toneMappingExposure;\r\n\tcolor = max( vec3( 0.0 ), color - 0.004 );\r\n\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\r\n\r\n}\r\n";

	var uv_pars_fragment = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\r\n\r\n\tvarying vec2 vUv;\r\n\r\n#endif";

	var uv_pars_vertex = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\r\n\r\n\tvarying vec2 vUv;\r\n\tuniform mat3 uvTransform;\r\n\r\n#endif\r\n";

	var uv_vertex = "#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )\r\n\r\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\r\n\r\n#endif";

	var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\r\n\r\n\tvarying vec2 vUv2;\r\n\r\n#endif";

	var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\r\n\r\n\tattribute vec2 uv2;\r\n\tvarying vec2 vUv2;\r\n\r\n#endif";

	var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\r\n\r\n\tvUv2 = uv2;\r\n\r\n#endif";

	var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )\r\n\r\n\tvec4 worldPosition = modelMatrix * vec4( transformed, 1.0 );\r\n\r\n#endif\r\n";

	var cube_frag = "uniform samplerCube tCube;\r\nuniform float tFlip;\r\nuniform float opacity;\r\n\r\nvarying vec3 vWorldPosition;\r\n\r\nvoid main() {\r\n\r\n\tgl_FragColor = textureCube( tCube, vec3( tFlip * vWorldPosition.x, vWorldPosition.yz ) );\r\n\tgl_FragColor.a *= opacity;\r\n\r\n}\r\n";

	var cube_vert = "varying vec3 vWorldPosition;\r\n\r\n#include <common>\r\n\r\nvoid main() {\r\n\r\n\tvWorldPosition = transformDirection( position, modelMatrix );\r\n\r\n\t#include <begin_vertex>\r\n\t#include <project_vertex>\r\n\r\n\tgl_Position.z = gl_Position.w; // set z to camera.far\r\n\r\n}\r\n";

	var depth_frag = "#if DEPTH_PACKING == 3200\r\n\r\n\tuniform float opacity;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <uv_pars_fragment>\r\n#include <map_pars_fragment>\r\n#include <alphamap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec4 diffuseColor = vec4( 1.0 );\r\n\r\n\t#if DEPTH_PACKING == 3200\r\n\r\n\t\tdiffuseColor.a = opacity;\r\n\r\n\t#endif\r\n\r\n\t#include <map_fragment>\r\n\t#include <alphamap_fragment>\r\n\t#include <alphatest_fragment>\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\r\n\t#if DEPTH_PACKING == 3200\r\n\r\n\t\tgl_FragColor = vec4( vec3( gl_FragCoord.z ), opacity );\r\n\r\n\t#elif DEPTH_PACKING == 3201\r\n\r\n\t\tgl_FragColor = packDepthToRGBA( gl_FragCoord.z );\r\n\r\n\t#endif\r\n\r\n}\r\n";

	var depth_vert = "#include <common>\r\n#include <uv_pars_vertex>\r\n#include <displacementmap_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\r\n\t#include <skinbase_vertex>\r\n\r\n\t#ifdef USE_DISPLACEMENTMAP\r\n\r\n\t\t#include <beginnormal_vertex>\r\n\t\t#include <morphnormal_vertex>\r\n\t\t#include <skinnormal_vertex>\r\n\r\n\t#endif\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <displacementmap_vertex>\r\n\t#include <project_vertex>\r\n\t#include <logdepthbuf_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\r\n}\r\n";

	var distanceRGBA_frag = "#define DISTANCE\r\n\r\nuniform vec3 referencePosition;\r\nuniform float nearDistance;\r\nuniform float farDistance;\r\nvarying vec3 vWorldPosition;\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <uv_pars_fragment>\r\n#include <map_pars_fragment>\r\n#include <alphamap_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main () {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec4 diffuseColor = vec4( 1.0 );\r\n\r\n\t#include <map_fragment>\r\n\t#include <alphamap_fragment>\r\n\t#include <alphatest_fragment>\r\n\r\n\tfloat dist = length( vWorldPosition - referencePosition );\r\n\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\r\n\tdist = saturate( dist ); // clamp to [ 0, 1 ]\r\n\r\n\tgl_FragColor = packDepthToRGBA( dist );\r\n\r\n}\r\n";

	var distanceRGBA_vert = "#define DISTANCE\r\n\r\nvarying vec3 vWorldPosition;\r\n\r\n#include <common>\r\n#include <uv_pars_vertex>\r\n#include <displacementmap_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\r\n\t#include <skinbase_vertex>\r\n\r\n\t#ifdef USE_DISPLACEMENTMAP\r\n\r\n\t\t#include <beginnormal_vertex>\r\n\t\t#include <morphnormal_vertex>\r\n\t\t#include <skinnormal_vertex>\r\n\r\n\t#endif\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <displacementmap_vertex>\r\n\t#include <project_vertex>\r\n\t#include <worldpos_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\r\n\tvWorldPosition = worldPosition.xyz;\r\n\r\n}\r\n";

	var equirect_frag = "uniform sampler2D tEquirect;\r\n\r\nvarying vec3 vWorldPosition;\r\n\r\n#include <common>\r\n\r\nvoid main() {\r\n\r\n\tvec3 direction = normalize( vWorldPosition );\r\n\r\n\tvec2 sampleUV;\r\n\r\n\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\r\n\r\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\r\n\r\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\r\n\r\n}\r\n";

	var equirect_vert = "varying vec3 vWorldPosition;\r\n\r\n#include <common>\r\n\r\nvoid main() {\r\n\r\n\tvWorldPosition = transformDirection( position, modelMatrix );\r\n\r\n\t#include <begin_vertex>\r\n\t#include <project_vertex>\r\n\r\n}\r\n";

	var linedashed_frag = "uniform vec3 diffuse;\r\nuniform float opacity;\r\n\r\nuniform float dashSize;\r\nuniform float totalSize;\r\n\r\nvarying float vLineDistance;\r\n\r\n#include <common>\r\n#include <color_pars_fragment>\r\n#include <fog_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\r\n\r\n\t\tdiscard;\r\n\r\n\t}\r\n\r\n\tvec3 outgoingLight = vec3( 0.0 );\r\n\tvec4 diffuseColor = vec4( diffuse, opacity );\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <color_fragment>\r\n\r\n\toutgoingLight = diffuseColor.rgb; // simple shader\r\n\r\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\r\n\r\n\t#include <premultiplied_alpha_fragment>\r\n\t#include <tonemapping_fragment>\r\n\t#include <encodings_fragment>\r\n\t#include <fog_fragment>\r\n\r\n}\r\n";

	var linedashed_vert = "uniform float scale;\r\nattribute float lineDistance;\r\n\r\nvarying float vLineDistance;\r\n\r\n#include <common>\r\n#include <color_pars_vertex>\r\n#include <fog_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <color_vertex>\r\n\r\n\tvLineDistance = scale * lineDistance;\r\n\r\n\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\r\n\tgl_Position = projectionMatrix * mvPosition;\r\n\r\n\t#include <logdepthbuf_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var meshbasic_frag = "uniform vec3 diffuse;\r\nuniform float opacity;\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <color_pars_fragment>\r\n#include <uv_pars_fragment>\r\n#include <uv2_pars_fragment>\r\n#include <map_pars_fragment>\r\n#include <alphamap_pars_fragment>\r\n#include <aomap_pars_fragment>\r\n#include <lightmap_pars_fragment>\r\n#include <envmap_pars_fragment>\r\n#include <fog_pars_fragment>\r\n#include <specularmap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec4 diffuseColor = vec4( diffuse, opacity );\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <map_fragment>\r\n\t#include <color_fragment>\r\n\t#include <alphamap_fragment>\r\n\t#include <alphatest_fragment>\r\n\t#include <specularmap_fragment>\r\n\r\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\r\n\r\n\t// accumulation (baked indirect lighting only)\r\n\t#ifdef USE_LIGHTMAP\r\n\r\n\t\treflectedLight.indirectDiffuse += texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\r\n\r\n\t#else\r\n\r\n\t\treflectedLight.indirectDiffuse += vec3( 1.0 );\r\n\r\n\t#endif\r\n\r\n\t// modulation\r\n\t#include <aomap_fragment>\r\n\r\n\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\r\n\r\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\r\n\r\n\t#include <envmap_fragment>\r\n\r\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\r\n\r\n\t#include <premultiplied_alpha_fragment>\r\n\t#include <tonemapping_fragment>\r\n\t#include <encodings_fragment>\r\n\t#include <fog_fragment>\r\n\r\n}\r\n";

	var meshbasic_vert = "#include <common>\r\n#include <uv_pars_vertex>\r\n#include <uv2_pars_vertex>\r\n#include <envmap_pars_vertex>\r\n#include <color_pars_vertex>\r\n#include <fog_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\t#include <uv2_vertex>\r\n\t#include <color_vertex>\r\n\t#include <skinbase_vertex>\r\n\r\n\t#ifdef USE_ENVMAP\r\n\r\n\t#include <beginnormal_vertex>\r\n\t#include <morphnormal_vertex>\r\n\t#include <skinnormal_vertex>\r\n\t#include <defaultnormal_vertex>\r\n\r\n\t#endif\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <project_vertex>\r\n\t#include <logdepthbuf_vertex>\r\n\r\n\t#include <worldpos_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\t#include <envmap_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var meshlambert_frag = "uniform vec3 diffuse;\r\nuniform vec3 emissive;\r\nuniform float opacity;\r\n\r\nvarying vec3 vLightFront;\r\n\r\n#ifdef DOUBLE_SIDED\r\n\r\n\tvarying vec3 vLightBack;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <dithering_pars_fragment>\r\n#include <color_pars_fragment>\r\n#include <uv_pars_fragment>\r\n#include <uv2_pars_fragment>\r\n#include <map_pars_fragment>\r\n#include <alphamap_pars_fragment>\r\n#include <aomap_pars_fragment>\r\n#include <lightmap_pars_fragment>\r\n#include <emissivemap_pars_fragment>\r\n#include <envmap_pars_fragment>\r\n#include <bsdfs>\r\n#include <lights_pars>\r\n#include <fog_pars_fragment>\r\n#include <shadowmap_pars_fragment>\r\n#include <shadowmask_pars_fragment>\r\n#include <specularmap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec4 diffuseColor = vec4( diffuse, opacity );\r\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\r\n\tvec3 totalEmissiveRadiance = emissive;\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <map_fragment>\r\n\t#include <color_fragment>\r\n\t#include <alphamap_fragment>\r\n\t#include <alphatest_fragment>\r\n\t#include <specularmap_fragment>\r\n\t#include <emissivemap_fragment>\r\n\r\n\t// accumulation\r\n\treflectedLight.indirectDiffuse = getAmbientLightIrradiance( ambientLightColor );\r\n\r\n\t#include <lightmap_fragment>\r\n\r\n\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\r\n\r\n\t#ifdef DOUBLE_SIDED\r\n\r\n\t\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\r\n\r\n\t#else\r\n\r\n\t\treflectedLight.directDiffuse = vLightFront;\r\n\r\n\t#endif\r\n\r\n\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\r\n\r\n\t// modulation\r\n\t#include <aomap_fragment>\r\n\r\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\r\n\r\n\t#include <envmap_fragment>\r\n\r\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\r\n\r\n\t#include <tonemapping_fragment>\r\n\t#include <encodings_fragment>\r\n\t#include <fog_fragment>\r\n\t#include <premultiplied_alpha_fragment>\r\n\t#include <dithering_fragment>\r\n\r\n}\r\n";

	var meshlambert_vert = "#define LAMBERT\r\n\r\nvarying vec3 vLightFront;\r\n\r\n#ifdef DOUBLE_SIDED\r\n\r\n\tvarying vec3 vLightBack;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <uv_pars_vertex>\r\n#include <uv2_pars_vertex>\r\n#include <envmap_pars_vertex>\r\n#include <bsdfs>\r\n#include <lights_pars>\r\n#include <color_pars_vertex>\r\n#include <fog_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <shadowmap_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\t#include <uv2_vertex>\r\n\t#include <color_vertex>\r\n\r\n\t#include <beginnormal_vertex>\r\n\t#include <morphnormal_vertex>\r\n\t#include <skinbase_vertex>\r\n\t#include <skinnormal_vertex>\r\n\t#include <defaultnormal_vertex>\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <project_vertex>\r\n\t#include <logdepthbuf_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\r\n\t#include <worldpos_vertex>\r\n\t#include <envmap_vertex>\r\n\t#include <lights_lambert_vertex>\r\n\t#include <shadowmap_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var meshphong_frag = "#define PHONG\r\n\r\nuniform vec3 diffuse;\r\nuniform vec3 emissive;\r\nuniform vec3 specular;\r\nuniform float shininess;\r\nuniform float opacity;\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <dithering_pars_fragment>\r\n#include <color_pars_fragment>\r\n#include <uv_pars_fragment>\r\n#include <uv2_pars_fragment>\r\n#include <map_pars_fragment>\r\n#include <alphamap_pars_fragment>\r\n#include <aomap_pars_fragment>\r\n#include <lightmap_pars_fragment>\r\n#include <emissivemap_pars_fragment>\r\n#include <envmap_pars_fragment>\r\n#include <gradientmap_pars_fragment>\r\n#include <fog_pars_fragment>\r\n#include <bsdfs>\r\n#include <lights_pars>\r\n#include <lights_phong_pars_fragment>\r\n#include <shadowmap_pars_fragment>\r\n#include <bumpmap_pars_fragment>\r\n#include <normalmap_pars_fragment>\r\n#include <specularmap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec4 diffuseColor = vec4( diffuse, opacity );\r\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\r\n\tvec3 totalEmissiveRadiance = emissive;\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <map_fragment>\r\n\t#include <color_fragment>\r\n\t#include <alphamap_fragment>\r\n\t#include <alphatest_fragment>\r\n\t#include <specularmap_fragment>\r\n\t#include <normal_fragment>\r\n\t#include <emissivemap_fragment>\r\n\r\n\t// accumulation\r\n\t#include <lights_phong_fragment>\r\n\t#include <lights_template>\r\n\r\n\t// modulation\r\n\t#include <aomap_fragment>\r\n\r\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\r\n\r\n\t#include <envmap_fragment>\r\n\r\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\r\n\r\n\t#include <tonemapping_fragment>\r\n\t#include <encodings_fragment>\r\n\t#include <fog_fragment>\r\n\t#include <premultiplied_alpha_fragment>\r\n\t#include <dithering_fragment>\r\n\r\n}\r\n";

	var meshphong_vert = "#define PHONG\r\n\r\nvarying vec3 vViewPosition;\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <uv_pars_vertex>\r\n#include <uv2_pars_vertex>\r\n#include <displacementmap_pars_vertex>\r\n#include <envmap_pars_vertex>\r\n#include <color_pars_vertex>\r\n#include <fog_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <shadowmap_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\t#include <uv2_vertex>\r\n\t#include <color_vertex>\r\n\r\n\t#include <beginnormal_vertex>\r\n\t#include <morphnormal_vertex>\r\n\t#include <skinbase_vertex>\r\n\t#include <skinnormal_vertex>\r\n\t#include <defaultnormal_vertex>\r\n\r\n#ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED\r\n\r\n\tvNormal = normalize( transformedNormal );\r\n\r\n#endif\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <displacementmap_vertex>\r\n\t#include <project_vertex>\r\n\t#include <logdepthbuf_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\r\n\tvViewPosition = - mvPosition.xyz;\r\n\r\n\t#include <worldpos_vertex>\r\n\t#include <envmap_vertex>\r\n\t#include <shadowmap_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var meshphysical_frag = "#define PHYSICAL\r\n\r\nuniform vec3 diffuse;\r\nuniform vec3 emissive;\r\nuniform float roughness;\r\nuniform float metalness;\r\nuniform float opacity;\r\n\r\n#ifndef STANDARD\r\n\tuniform float clearCoat;\r\n\tuniform float clearCoatRoughness;\r\n#endif\r\n\r\nvarying vec3 vViewPosition;\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <dithering_pars_fragment>\r\n#include <color_pars_fragment>\r\n#include <uv_pars_fragment>\r\n#include <uv2_pars_fragment>\r\n#include <map_pars_fragment>\r\n#include <alphamap_pars_fragment>\r\n#include <aomap_pars_fragment>\r\n#include <lightmap_pars_fragment>\r\n#include <emissivemap_pars_fragment>\r\n#include <envmap_pars_fragment>\r\n#include <fog_pars_fragment>\r\n#include <bsdfs>\r\n#include <cube_uv_reflection_fragment>\r\n#include <lights_pars>\r\n#include <lights_physical_pars_fragment>\r\n#include <shadowmap_pars_fragment>\r\n#include <bumpmap_pars_fragment>\r\n#include <normalmap_pars_fragment>\r\n#include <roughnessmap_pars_fragment>\r\n#include <metalnessmap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec4 diffuseColor = vec4( diffuse, opacity );\r\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\r\n\tvec3 totalEmissiveRadiance = emissive;\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <map_fragment>\r\n\t#include <color_fragment>\r\n\t#include <alphamap_fragment>\r\n\t#include <alphatest_fragment>\r\n\t#include <roughnessmap_fragment>\r\n\t#include <metalnessmap_fragment>\r\n\t#include <normal_fragment>\r\n\t#include <emissivemap_fragment>\r\n\r\n\t// accumulation\r\n\t#include <lights_physical_fragment>\r\n\t#include <lights_template>\r\n\r\n\t// modulation\r\n\t#include <aomap_fragment>\r\n\r\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\r\n\r\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\r\n\r\n\t#include <tonemapping_fragment>\r\n\t#include <encodings_fragment>\r\n\t#include <fog_fragment>\r\n\t#include <premultiplied_alpha_fragment>\r\n\t#include <dithering_fragment>\r\n\r\n}\r\n";

	var meshphysical_vert = "#define PHYSICAL\r\n\r\nvarying vec3 vViewPosition;\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n#include <common>\r\n#include <uv_pars_vertex>\r\n#include <uv2_pars_vertex>\r\n#include <displacementmap_pars_vertex>\r\n#include <color_pars_vertex>\r\n#include <fog_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <shadowmap_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\t#include <uv2_vertex>\r\n\t#include <color_vertex>\r\n\r\n\t#include <beginnormal_vertex>\r\n\t#include <morphnormal_vertex>\r\n\t#include <skinbase_vertex>\r\n\t#include <skinnormal_vertex>\r\n\t#include <defaultnormal_vertex>\r\n\r\n#ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED\r\n\r\n\tvNormal = normalize( transformedNormal );\r\n\r\n#endif\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <displacementmap_vertex>\r\n\t#include <project_vertex>\r\n\t#include <logdepthbuf_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\r\n\tvViewPosition = - mvPosition.xyz;\r\n\r\n\t#include <worldpos_vertex>\r\n\t#include <shadowmap_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var normal_frag = "#define NORMAL\r\n\r\nuniform float opacity;\r\n\r\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\r\n\r\n\tvarying vec3 vViewPosition;\r\n\r\n#endif\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n#include <packing>\r\n#include <uv_pars_fragment>\r\n#include <bumpmap_pars_fragment>\r\n#include <normalmap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <normal_fragment>\r\n\r\n\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\r\n\r\n}\r\n";

	var normal_vert = "#define NORMAL\r\n\r\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\r\n\r\n\tvarying vec3 vViewPosition;\r\n\r\n#endif\r\n\r\n#ifndef FLAT_SHADED\r\n\r\n\tvarying vec3 vNormal;\r\n\r\n#endif\r\n\r\n#include <uv_pars_vertex>\r\n#include <displacementmap_pars_vertex>\r\n#include <morphtarget_pars_vertex>\r\n#include <skinning_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <uv_vertex>\r\n\r\n\t#include <beginnormal_vertex>\r\n\t#include <morphnormal_vertex>\r\n\t#include <skinbase_vertex>\r\n\t#include <skinnormal_vertex>\r\n\t#include <defaultnormal_vertex>\r\n\r\n#ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED\r\n\r\n\tvNormal = normalize( transformedNormal );\r\n\r\n#endif\r\n\r\n\t#include <begin_vertex>\r\n\t#include <morphtarget_vertex>\r\n\t#include <skinning_vertex>\r\n\t#include <displacementmap_vertex>\r\n\t#include <project_vertex>\r\n\t#include <logdepthbuf_vertex>\r\n\r\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\r\n\r\n\tvViewPosition = - mvPosition.xyz;\r\n\r\n#endif\r\n\r\n}\r\n";

	var points_frag = "uniform vec3 diffuse;\r\nuniform float opacity;\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <color_pars_fragment>\r\n#include <map_particle_pars_fragment>\r\n#include <fog_pars_fragment>\r\n#include <shadowmap_pars_fragment>\r\n#include <logdepthbuf_pars_fragment>\r\n#include <clipping_planes_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\t#include <clipping_planes_fragment>\r\n\r\n\tvec3 outgoingLight = vec3( 0.0 );\r\n\tvec4 diffuseColor = vec4( diffuse, opacity );\r\n\r\n\t#include <logdepthbuf_fragment>\r\n\t#include <map_particle_fragment>\r\n\t#include <color_fragment>\r\n\t#include <alphatest_fragment>\r\n\r\n\toutgoingLight = diffuseColor.rgb;\r\n\r\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\r\n\r\n\t#include <premultiplied_alpha_fragment>\r\n\t#include <tonemapping_fragment>\r\n\t#include <encodings_fragment>\r\n\t#include <fog_fragment>\r\n\r\n}\r\n";

	var points_vert = "uniform float size;\r\nuniform float scale;\r\n\r\n#include <common>\r\n#include <color_pars_vertex>\r\n#include <fog_pars_vertex>\r\n#include <shadowmap_pars_vertex>\r\n#include <logdepthbuf_pars_vertex>\r\n#include <clipping_planes_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <color_vertex>\r\n\t#include <begin_vertex>\r\n\t#include <project_vertex>\r\n\r\n\t#ifdef USE_SIZEATTENUATION\r\n\t\tgl_PointSize = size * ( scale / - mvPosition.z );\r\n\t#else\r\n\t\tgl_PointSize = size;\r\n\t#endif\r\n\r\n\t#include <logdepthbuf_vertex>\r\n\t#include <clipping_planes_vertex>\r\n\t#include <worldpos_vertex>\r\n\t#include <shadowmap_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var shadow_frag = "uniform vec3 color;\r\nuniform float opacity;\r\n\r\n#include <common>\r\n#include <packing>\r\n#include <fog_pars_fragment>\r\n#include <bsdfs>\r\n#include <lights_pars>\r\n#include <shadowmap_pars_fragment>\r\n#include <shadowmask_pars_fragment>\r\n\r\nvoid main() {\r\n\r\n\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\r\n\r\n\t#include <fog_fragment>\r\n\r\n}\r\n";

	var shadow_vert = "#include <fog_pars_vertex>\r\n#include <shadowmap_pars_vertex>\r\n\r\nvoid main() {\r\n\r\n\t#include <begin_vertex>\r\n\t#include <project_vertex>\r\n\t#include <worldpos_vertex>\r\n\t#include <shadowmap_vertex>\r\n\t#include <fog_vertex>\r\n\r\n}\r\n";

	var ShaderChunk = {
		alphamap_fragment: alphamap_fragment,
		alphamap_pars_fragment: alphamap_pars_fragment,
		alphatest_fragment: alphatest_fragment,
		aomap_fragment: aomap_fragment,
		aomap_pars_fragment: aomap_pars_fragment,
		begin_vertex: begin_vertex,
		beginnormal_vertex: beginnormal_vertex,
		bsdfs: bsdfs,
		bumpmap_pars_fragment: bumpmap_pars_fragment,
		clipping_planes_fragment: clipping_planes_fragment,
		clipping_planes_pars_fragment: clipping_planes_pars_fragment,
		clipping_planes_pars_vertex: clipping_planes_pars_vertex,
		clipping_planes_vertex: clipping_planes_vertex,
		color_fragment: color_fragment,
		color_pars_fragment: color_pars_fragment,
		color_pars_vertex: color_pars_vertex,
		color_vertex: color_vertex,
		common: common,
		cube_uv_reflection_fragment: cube_uv_reflection_fragment,
		defaultnormal_vertex: defaultnormal_vertex,
		displacementmap_pars_vertex: displacementmap_pars_vertex,
		displacementmap_vertex: displacementmap_vertex,
		emissivemap_fragment: emissivemap_fragment,
		emissivemap_pars_fragment: emissivemap_pars_fragment,
		encodings_fragment: encodings_fragment,
		encodings_pars_fragment: encodings_pars_fragment,
		envmap_fragment: envmap_fragment,
		envmap_pars_fragment: envmap_pars_fragment,
		envmap_pars_vertex: envmap_pars_vertex,
		envmap_vertex: envmap_vertex,
		fog_vertex: fog_vertex,
		fog_pars_vertex: fog_pars_vertex,
		fog_fragment: fog_fragment,
		fog_pars_fragment: fog_pars_fragment,
		gradientmap_pars_fragment: gradientmap_pars_fragment,
		lightmap_fragment: lightmap_fragment,
		lightmap_pars_fragment: lightmap_pars_fragment,
		lights_lambert_vertex: lights_lambert_vertex,
		lights_pars: lights_pars,
		lights_phong_fragment: lights_phong_fragment,
		lights_phong_pars_fragment: lights_phong_pars_fragment,
		lights_physical_fragment: lights_physical_fragment,
		lights_physical_pars_fragment: lights_physical_pars_fragment,
		lights_template: lights_template,
		logdepthbuf_fragment: logdepthbuf_fragment,
		logdepthbuf_pars_fragment: logdepthbuf_pars_fragment,
		logdepthbuf_pars_vertex: logdepthbuf_pars_vertex,
		logdepthbuf_vertex: logdepthbuf_vertex,
		map_fragment: map_fragment,
		map_pars_fragment: map_pars_fragment,
		map_particle_fragment: map_particle_fragment,
		map_particle_pars_fragment: map_particle_pars_fragment,
		metalnessmap_fragment: metalnessmap_fragment,
		metalnessmap_pars_fragment: metalnessmap_pars_fragment,
		morphnormal_vertex: morphnormal_vertex,
		morphtarget_pars_vertex: morphtarget_pars_vertex,
		morphtarget_vertex: morphtarget_vertex,
		normal_fragment: normal_fragment,
		normalmap_pars_fragment: normalmap_pars_fragment,
		packing: packing,
		premultiplied_alpha_fragment: premultiplied_alpha_fragment,
		project_vertex: project_vertex,
		dithering_fragment: dithering_fragment,
		dithering_pars_fragment: dithering_pars_fragment,
		roughnessmap_fragment: roughnessmap_fragment,
		roughnessmap_pars_fragment: roughnessmap_pars_fragment,
		shadowmap_pars_fragment: shadowmap_pars_fragment,
		shadowmap_pars_vertex: shadowmap_pars_vertex,
		shadowmap_vertex: shadowmap_vertex,
		shadowmask_pars_fragment: shadowmask_pars_fragment,
		skinbase_vertex: skinbase_vertex,
		skinning_pars_vertex: skinning_pars_vertex,
		skinning_vertex: skinning_vertex,
		skinnormal_vertex: skinnormal_vertex,
		specularmap_fragment: specularmap_fragment,
		specularmap_pars_fragment: specularmap_pars_fragment,
		tonemapping_fragment: tonemapping_fragment,
		tonemapping_pars_fragment: tonemapping_pars_fragment,
		uv_pars_fragment: uv_pars_fragment,
		uv_pars_vertex: uv_pars_vertex,
		uv_vertex: uv_vertex,
		uv2_pars_fragment: uv2_pars_fragment,
		uv2_pars_vertex: uv2_pars_vertex,
		uv2_vertex: uv2_vertex,
		worldpos_vertex: worldpos_vertex,

		cube_frag: cube_frag,
		cube_vert: cube_vert,
		depth_frag: depth_frag,
		depth_vert: depth_vert,
		distanceRGBA_frag: distanceRGBA_frag,
		distanceRGBA_vert: distanceRGBA_vert,
		equirect_frag: equirect_frag,
		equirect_vert: equirect_vert,
		linedashed_frag: linedashed_frag,
		linedashed_vert: linedashed_vert,
		meshbasic_frag: meshbasic_frag,
		meshbasic_vert: meshbasic_vert,
		meshlambert_frag: meshlambert_frag,
		meshlambert_vert: meshlambert_vert,
		meshphong_frag: meshphong_frag,
		meshphong_vert: meshphong_vert,
		meshphysical_frag: meshphysical_frag,
		meshphysical_vert: meshphysical_vert,
		normal_frag: normal_frag,
		normal_vert: normal_vert,
		points_frag: points_frag,
		points_vert: points_vert,
		shadow_frag: shadow_frag,
		shadow_vert: shadow_vert
	};

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author mikael emtinger / http://gomo.se/
	 */

	var ShaderLib = {

		basic: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.specularmap,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.fog
			] ),

			vertexShader: ShaderChunk.meshbasic_vert,
			fragmentShader: ShaderChunk.meshbasic_frag

		},

		lambert: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.specularmap,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.emissivemap,
				UniformsLib.fog,
				UniformsLib.lights,
				{
					emissive: { value: new Color( 0x000000 ) }
				}
			] ),

			vertexShader: ShaderChunk.meshlambert_vert,
			fragmentShader: ShaderChunk.meshlambert_frag

		},

		phong: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.specularmap,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.emissivemap,
				UniformsLib.bumpmap,
				UniformsLib.normalmap,
				UniformsLib.displacementmap,
				UniformsLib.gradientmap,
				UniformsLib.fog,
				UniformsLib.lights,
				{
					emissive: { value: new Color( 0x000000 ) },
					specular: { value: new Color( 0x111111 ) },
					shininess: { value: 30 }
				}
			] ),

			vertexShader: ShaderChunk.meshphong_vert,
			fragmentShader: ShaderChunk.meshphong_frag

		},

		standard: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.envmap,
				UniformsLib.aomap,
				UniformsLib.lightmap,
				UniformsLib.emissivemap,
				UniformsLib.bumpmap,
				UniformsLib.normalmap,
				UniformsLib.displacementmap,
				UniformsLib.roughnessmap,
				UniformsLib.metalnessmap,
				UniformsLib.fog,
				UniformsLib.lights,
				{
					emissive: { value: new Color( 0x000000 ) },
					roughness: { value: 0.5 },
					metalness: { value: 0.5 },
					envMapIntensity: { value: 1 } // temporary
				}
			] ),

			vertexShader: ShaderChunk.meshphysical_vert,
			fragmentShader: ShaderChunk.meshphysical_frag

		},

		points: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.points,
				UniformsLib.fog
			] ),

			vertexShader: ShaderChunk.points_vert,
			fragmentShader: ShaderChunk.points_frag

		},

		dashed: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.fog,
				{
					scale: { value: 1 },
					dashSize: { value: 1 },
					totalSize: { value: 2 }
				}
			] ),

			vertexShader: ShaderChunk.linedashed_vert,
			fragmentShader: ShaderChunk.linedashed_frag

		},

		depth: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.displacementmap
			] ),

			vertexShader: ShaderChunk.depth_vert,
			fragmentShader: ShaderChunk.depth_frag

		},

		normal: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.bumpmap,
				UniformsLib.normalmap,
				UniformsLib.displacementmap,
				{
					opacity: { value: 1.0 }
				}
			] ),

			vertexShader: ShaderChunk.normal_vert,
			fragmentShader: ShaderChunk.normal_frag

		},

		/* -------------------------------------------------------------------------
		//	Cube map shader
		 ------------------------------------------------------------------------- */

		cube: {

			uniforms: {
				tCube: { value: null },
				tFlip: { value: - 1 },
				opacity: { value: 1.0 }
			},

			vertexShader: ShaderChunk.cube_vert,
			fragmentShader: ShaderChunk.cube_frag

		},

		equirect: {

			uniforms: {
				tEquirect: { value: null },
			},

			vertexShader: ShaderChunk.equirect_vert,
			fragmentShader: ShaderChunk.equirect_frag

		},

		distanceRGBA: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.common,
				UniformsLib.displacementmap,
				{
					referencePosition: { value: new Vector3() },
					nearDistance: { value: 1 },
					farDistance: { value: 1000 }
				}
			] ),

			vertexShader: ShaderChunk.distanceRGBA_vert,
			fragmentShader: ShaderChunk.distanceRGBA_frag

		},

		shadow: {

			uniforms: UniformsUtils.merge( [
				UniformsLib.lights,
				UniformsLib.fog,
				{
					color: { value: new Color( 0x00000 ) },
					opacity: { value: 1.0 }
				},
			] ),

			vertexShader: ShaderChunk.shadow_vert,
			fragmentShader: ShaderChunk.shadow_frag

		}

	};

	ShaderLib.physical = {

		uniforms: UniformsUtils.merge( [
			ShaderLib.standard.uniforms,
			{
				clearCoat: { value: 0 },
				clearCoatRoughness: { value: 0 }
			}
		] ),

		vertexShader: ShaderChunk.meshphysical_vert,
		fragmentShader: ShaderChunk.meshphysical_frag

	};

	/**
	 * @author bhouston / http://clara.io
	 */

	function Box2( min, max ) {

		this.min = ( min !== undefined ) ? min : new Vector2( + Infinity, + Infinity );
		this.max = ( max !== undefined ) ? max : new Vector2( - Infinity, - Infinity );

	}

	Object.assign( Box2.prototype, {

		set: function ( min, max ) {

			this.min.copy( min );
			this.max.copy( max );

			return this;

		},

		setFromPoints: function ( points ) {

			this.makeEmpty();

			for ( var i = 0, il = points.length; i < il; i ++ ) {

				this.expandByPoint( points[ i ] );

			}

			return this;

		},

		setFromCenterAndSize: function () {

			var v1 = new Vector2();

			return function setFromCenterAndSize( center, size ) {

				var halfSize = v1.copy( size ).multiplyScalar( 0.5 );
				this.min.copy( center ).sub( halfSize );
				this.max.copy( center ).add( halfSize );

				return this;

			};

		}(),

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( box ) {

			this.min.copy( box.min );
			this.max.copy( box.max );

			return this;

		},

		makeEmpty: function () {

			this.min.x = this.min.y = + Infinity;
			this.max.x = this.max.y = - Infinity;

			return this;

		},

		isEmpty: function () {

			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes

			return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y );

		},

		getCenter: function ( optionalTarget ) {

			var result = optionalTarget || new Vector2();
			return this.isEmpty() ? result.set( 0, 0 ) : result.addVectors( this.min, this.max ).multiplyScalar( 0.5 );

		},

		getSize: function ( optionalTarget ) {

			var result = optionalTarget || new Vector2();
			return this.isEmpty() ? result.set( 0, 0 ) : result.subVectors( this.max, this.min );

		},

		expandByPoint: function ( point ) {

			this.min.min( point );
			this.max.max( point );

			return this;

		},

		expandByVector: function ( vector ) {

			this.min.sub( vector );
			this.max.add( vector );

			return this;

		},

		expandByScalar: function ( scalar ) {

			this.min.addScalar( - scalar );
			this.max.addScalar( scalar );

			return this;

		},

		containsPoint: function ( point ) {

			return point.x < this.min.x || point.x > this.max.x ||
				point.y < this.min.y || point.y > this.max.y ? false : true;

		},

		containsBox: function ( box ) {

			return this.min.x <= box.min.x && box.max.x <= this.max.x &&
				this.min.y <= box.min.y && box.max.y <= this.max.y;

		},

		getParameter: function ( point, optionalTarget ) {

			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.

			var result = optionalTarget || new Vector2();

			return result.set(
				( point.x - this.min.x ) / ( this.max.x - this.min.x ),
				( point.y - this.min.y ) / ( this.max.y - this.min.y )
			);

		},

		intersectsBox: function ( box ) {

			// using 4 splitting planes to rule out intersections

			return box.max.x < this.min.x || box.min.x > this.max.x ||
				box.max.y < this.min.y || box.min.y > this.max.y ? false : true;

		},

		clampPoint: function ( point, optionalTarget ) {

			var result = optionalTarget || new Vector2();
			return result.copy( point ).clamp( this.min, this.max );

		},

		distanceToPoint: function () {

			var v1 = new Vector2();

			return function distanceToPoint( point ) {

				var clampedPoint = v1.copy( point ).clamp( this.min, this.max );
				return clampedPoint.sub( point ).length();

			};

		}(),

		intersect: function ( box ) {

			this.min.max( box.min );
			this.max.min( box.max );

			return this;

		},

		union: function ( box ) {

			this.min.min( box.min );
			this.max.max( box.max );

			return this;

		},

		translate: function ( offset ) {

			this.min.add( offset );
			this.max.add( offset );

			return this;

		},

		equals: function ( box ) {

			return box.min.equals( this.min ) && box.max.equals( this.max );

		}

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function WebGLFlareRenderer( renderer, gl, state, textures, capabilities ) {

		var vertexBuffer, elementBuffer;
		var shader, program, attributes, uniforms;

		var tempTexture, occlusionTexture;

		function init() {

			var vertices = new Float32Array( [
				- 1, - 1, 0, 0,
				  1, - 1, 1, 0,
				  1, 1, 1, 1,
				- 1, 1, 0, 1
			] );

			var faces = new Uint16Array( [
				0, 1, 2,
				0, 2, 3
			] );

			// buffers

			vertexBuffer = gl.createBuffer();
			elementBuffer = gl.createBuffer();

			gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
			gl.bufferData( gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW );

			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );
			gl.bufferData( gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW );

			// textures

			tempTexture = gl.createTexture();
			occlusionTexture = gl.createTexture();

			state.bindTexture( gl.TEXTURE_2D, tempTexture );
			gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGB, 16, 16, 0, gl.RGB, gl.UNSIGNED_BYTE, null );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST );

			state.bindTexture( gl.TEXTURE_2D, occlusionTexture );
			gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, 16, 16, 0, gl.RGBA, gl.UNSIGNED_BYTE, null );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST );
			gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST );

			shader = {

				vertexShader: [

					'uniform lowp int renderType;',

					'uniform vec3 screenPosition;',
					'uniform vec2 scale;',
					'uniform float rotation;',

					'uniform sampler2D occlusionMap;',

					'attribute vec2 position;',
					'attribute vec2 uv;',

					'varying vec2 vUV;',
					'varying float vVisibility;',

					'void main() {',

					'	vUV = uv;',

					'	vec2 pos = position;',

					'	if ( renderType == 2 ) {',

					'		vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.5, 0.1 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.9, 0.1 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.9, 0.9 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.1, 0.9 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) );',
					'		visibility += texture2D( occlusionMap, vec2( 0.5, 0.5 ) );',

					'		vVisibility =        visibility.r / 9.0;',
					'		vVisibility *= 1.0 - visibility.g / 9.0;',
					'		vVisibility *=       visibility.b / 9.0;',
					'		vVisibility *= 1.0 - visibility.a / 9.0;',

					'		pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;',
					'		pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;',

					'	}',

					'	gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );',

					'}'

				].join( '\n' ),

				fragmentShader: [

					'uniform lowp int renderType;',

					'uniform sampler2D map;',
					'uniform float opacity;',
					'uniform vec3 color;',

					'varying vec2 vUV;',
					'varying float vVisibility;',

					'void main() {',

					// pink square

					'	if ( renderType == 0 ) {',

					'		gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );',

					// restore

					'	} else if ( renderType == 1 ) {',

					'		gl_FragColor = texture2D( map, vUV );',

					// flare

					'	} else {',

					'		vec4 texture = texture2D( map, vUV );',
					'		texture.a *= opacity * vVisibility;',
					'		gl_FragColor = texture;',
					'		gl_FragColor.rgb *= color;',

					'	}',

					'}'

				].join( '\n' )

			};

			program = createProgram( shader );

			attributes = {
				vertex: gl.getAttribLocation( program, 'position' ),
				uv: gl.getAttribLocation( program, 'uv' )
			};

			uniforms = {
				renderType: gl.getUniformLocation( program, 'renderType' ),
				map: gl.getUniformLocation( program, 'map' ),
				occlusionMap: gl.getUniformLocation( program, 'occlusionMap' ),
				opacity: gl.getUniformLocation( program, 'opacity' ),
				color: gl.getUniformLocation( program, 'color' ),
				scale: gl.getUniformLocation( program, 'scale' ),
				rotation: gl.getUniformLocation( program, 'rotation' ),
				screenPosition: gl.getUniformLocation( program, 'screenPosition' )
			};

		}

		/*
		 * Render lens flares
		 * Method: renders 16x16 0xff00ff-colored points scattered over the light source area,
		 *         reads these back and calculates occlusion.
		 */

		this.render = function ( flares, scene, camera, viewport ) {

			if ( flares.length === 0 ) return;

			var tempPosition = new Vector3();

			var invAspect = viewport.w / viewport.z,
				halfViewportWidth = viewport.z * 0.5,
				halfViewportHeight = viewport.w * 0.5;

			var size = 16 / viewport.w,
				scale = new Vector2( size * invAspect, size );

			var screenPosition = new Vector3( 1, 1, 0 ),
				screenPositionPixels = new Vector2( 1, 1 );

			var validArea = new Box2();

			validArea.min.set( viewport.x, viewport.y );
			validArea.max.set( viewport.x + ( viewport.z - 16 ), viewport.y + ( viewport.w - 16 ) );

			if ( program === undefined ) {

				init();

			}

			state.useProgram( program );

			state.initAttributes();
			state.enableAttribute( attributes.vertex );
			state.enableAttribute( attributes.uv );
			state.disableUnusedAttributes();

			// loop through all lens flares to update their occlusion and positions
			// setup gl and common used attribs/uniforms

			gl.uniform1i( uniforms.occlusionMap, 0 );
			gl.uniform1i( uniforms.map, 1 );

			gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
			gl.vertexAttribPointer( attributes.vertex, 2, gl.FLOAT, false, 2 * 8, 0 );
			gl.vertexAttribPointer( attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8 );

			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );

			state.disable( gl.CULL_FACE );
			state.buffers.depth.setMask( false );

			for ( var i = 0, l = flares.length; i < l; i ++ ) {

				size = 16 / viewport.w;
				scale.set( size * invAspect, size );

				// calc object screen position

				var flare = flares[ i ];

				tempPosition.set( flare.matrixWorld.elements[ 12 ], flare.matrixWorld.elements[ 13 ], flare.matrixWorld.elements[ 14 ] );

				tempPosition.applyMatrix4( camera.matrixWorldInverse );
				tempPosition.applyMatrix4( camera.projectionMatrix );

				// setup arrays for gl programs

				screenPosition.copy( tempPosition );

				// horizontal and vertical coordinate of the lower left corner of the pixels to copy

				screenPositionPixels.x = viewport.x + ( screenPosition.x * halfViewportWidth ) + halfViewportWidth - 8;
				screenPositionPixels.y = viewport.y + ( screenPosition.y * halfViewportHeight ) + halfViewportHeight - 8;

				// screen cull

				if ( validArea.containsPoint( screenPositionPixels ) === true ) {

					// save current RGB to temp texture

					state.activeTexture( gl.TEXTURE0 );
					state.bindTexture( gl.TEXTURE_2D, null );
					state.activeTexture( gl.TEXTURE1 );
					state.bindTexture( gl.TEXTURE_2D, tempTexture );
					gl.copyTexImage2D( gl.TEXTURE_2D, 0, gl.RGB, screenPositionPixels.x, screenPositionPixels.y, 16, 16, 0 );


					// render pink quad

					gl.uniform1i( uniforms.renderType, 0 );
					gl.uniform2f( uniforms.scale, scale.x, scale.y );
					gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );

					state.disable( gl.BLEND );
					state.enable( gl.DEPTH_TEST );

					gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );


					// copy result to occlusionMap

					state.activeTexture( gl.TEXTURE0 );
					state.bindTexture( gl.TEXTURE_2D, occlusionTexture );
					gl.copyTexImage2D( gl.TEXTURE_2D, 0, gl.RGBA, screenPositionPixels.x, screenPositionPixels.y, 16, 16, 0 );


					// restore graphics

					gl.uniform1i( uniforms.renderType, 1 );
					state.disable( gl.DEPTH_TEST );

					state.activeTexture( gl.TEXTURE1 );
					state.bindTexture( gl.TEXTURE_2D, tempTexture );
					gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );


					// update object positions

					flare.positionScreen.copy( screenPosition );

					if ( flare.customUpdateCallback ) {

						flare.customUpdateCallback( flare );

					} else {

						flare.updateLensFlares();

					}

					// render flares

					gl.uniform1i( uniforms.renderType, 2 );
					state.enable( gl.BLEND );

					for ( var j = 0, jl = flare.lensFlares.length; j < jl; j ++ ) {

						var sprite = flare.lensFlares[ j ];

						if ( sprite.opacity > 0.001 && sprite.scale > 0.001 ) {

							screenPosition.x = sprite.x;
							screenPosition.y = sprite.y;
							screenPosition.z = sprite.z;

							size = sprite.size * sprite.scale / viewport.w;

							scale.x = size * invAspect;
							scale.y = size;

							gl.uniform3f( uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z );
							gl.uniform2f( uniforms.scale, scale.x, scale.y );
							gl.uniform1f( uniforms.rotation, sprite.rotation );

							gl.uniform1f( uniforms.opacity, sprite.opacity );
							gl.uniform3f( uniforms.color, sprite.color.r, sprite.color.g, sprite.color.b );

							state.setBlending( sprite.blending, sprite.blendEquation, sprite.blendSrc, sprite.blendDst );

							textures.setTexture2D( sprite.texture, 1 );

							gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );

						}

					}

				}

			}

			// restore gl

			state.enable( gl.CULL_FACE );
			state.enable( gl.DEPTH_TEST );
			state.buffers.depth.setMask( true );

			state.reset();

		};

		function createProgram( shader ) {

			var program = gl.createProgram();

			var fragmentShader = gl.createShader( gl.FRAGMENT_SHADER );
			var vertexShader = gl.createShader( gl.VERTEX_SHADER );

			var prefix = 'precision ' + capabilities.precision + ' float;\n';

			gl.shaderSource( fragmentShader, prefix + shader.fragmentShader );
			gl.shaderSource( vertexShader, prefix + shader.vertexShader );

			gl.compileShader( fragmentShader );
			gl.compileShader( vertexShader );

			gl.attachShader( program, fragmentShader );
			gl.attachShader( program, vertexShader );

			gl.linkProgram( program );

			return program;

		}

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function CanvasTexture( canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {

		Texture.call( this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );

		this.needsUpdate = true;

	}

	CanvasTexture.prototype = Object.create( Texture.prototype );
	CanvasTexture.prototype.constructor = CanvasTexture;

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function WebGLSpriteRenderer( renderer, gl, state, textures, capabilities ) {

		var vertexBuffer, elementBuffer;
		var program, attributes, uniforms;

		var texture;

		// decompose matrixWorld

		var spritePosition = new Vector3();
		var spriteRotation = new Quaternion();
		var spriteScale = new Vector3();

		function init() {

			var vertices = new Float32Array( [
				- 0.5, - 0.5, 0, 0,
				  0.5, - 0.5, 1, 0,
				  0.5, 0.5, 1, 1,
				- 0.5, 0.5, 0, 1
			] );

			var faces = new Uint16Array( [
				0, 1, 2,
				0, 2, 3
			] );

			vertexBuffer = gl.createBuffer();
			elementBuffer = gl.createBuffer();

			gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
			gl.bufferData( gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW );

			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );
			gl.bufferData( gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW );

			program = createProgram();

			attributes = {
				position: gl.getAttribLocation( program, 'position' ),
				uv: gl.getAttribLocation( program, 'uv' )
			};

			uniforms = {
				uvOffset: gl.getUniformLocation( program, 'uvOffset' ),
				uvScale: gl.getUniformLocation( program, 'uvScale' ),

				rotation: gl.getUniformLocation( program, 'rotation' ),
				scale: gl.getUniformLocation( program, 'scale' ),

				color: gl.getUniformLocation( program, 'color' ),
				map: gl.getUniformLocation( program, 'map' ),
				opacity: gl.getUniformLocation( program, 'opacity' ),

				modelViewMatrix: gl.getUniformLocation( program, 'modelViewMatrix' ),
				projectionMatrix: gl.getUniformLocation( program, 'projectionMatrix' ),

				fogType: gl.getUniformLocation( program, 'fogType' ),
				fogDensity: gl.getUniformLocation( program, 'fogDensity' ),
				fogNear: gl.getUniformLocation( program, 'fogNear' ),
				fogFar: gl.getUniformLocation( program, 'fogFar' ),
				fogColor: gl.getUniformLocation( program, 'fogColor' ),
				fogDepth: gl.getUniformLocation( program, 'fogDepth' ),

				alphaTest: gl.getUniformLocation( program, 'alphaTest' )
			};

			var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
			canvas.width = 8;
			canvas.height = 8;

			var context = canvas.getContext( '2d' );
			context.fillStyle = 'white';
			context.fillRect( 0, 0, 8, 8 );

			texture = new CanvasTexture( canvas );

		}

		this.render = function ( sprites, scene, camera ) {

			if ( sprites.length === 0 ) return;

			// setup gl

			if ( program === undefined ) {

				init();

			}

			state.useProgram( program );

			state.initAttributes();
			state.enableAttribute( attributes.position );
			state.enableAttribute( attributes.uv );
			state.disableUnusedAttributes();

			state.disable( gl.CULL_FACE );
			state.enable( gl.BLEND );

			gl.bindBuffer( gl.ARRAY_BUFFER, vertexBuffer );
			gl.vertexAttribPointer( attributes.position, 2, gl.FLOAT, false, 2 * 8, 0 );
			gl.vertexAttribPointer( attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8 );

			gl.bindBuffer( gl.ELEMENT_ARRAY_BUFFER, elementBuffer );

			gl.uniformMatrix4fv( uniforms.projectionMatrix, false, camera.projectionMatrix.elements );

			state.activeTexture( gl.TEXTURE0 );
			gl.uniform1i( uniforms.map, 0 );

			var oldFogType = 0;
			var sceneFogType = 0;
			var fog = scene.fog;

			if ( fog ) {

				gl.uniform3f( uniforms.fogColor, fog.color.r, fog.color.g, fog.color.b );

				if ( fog.isFog ) {

					gl.uniform1f( uniforms.fogNear, fog.near );
					gl.uniform1f( uniforms.fogFar, fog.far );

					gl.uniform1i( uniforms.fogType, 1 );
					oldFogType = 1;
					sceneFogType = 1;

				} else if ( fog.isFogExp2 ) {

					gl.uniform1f( uniforms.fogDensity, fog.density );

					gl.uniform1i( uniforms.fogType, 2 );
					oldFogType = 2;
					sceneFogType = 2;

				}

			} else {

				gl.uniform1i( uniforms.fogType, 0 );
				oldFogType = 0;
				sceneFogType = 0;

			}


			// update positions and sort

			for ( var i = 0, l = sprites.length; i < l; i ++ ) {

				var sprite = sprites[ i ];

				sprite.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, sprite.matrixWorld );
				sprite.z = - sprite.modelViewMatrix.elements[ 14 ];

			}

			sprites.sort( painterSortStable );

			// render all sprites

			var scale = [];

			for ( var i = 0, l = sprites.length; i < l; i ++ ) {

				var sprite = sprites[ i ];
				var material = sprite.material;

				if ( material.visible === false ) continue;

				sprite.onBeforeRender( renderer, scene, camera, undefined, material, undefined );

				gl.uniform1f( uniforms.alphaTest, material.alphaTest );
				gl.uniformMatrix4fv( uniforms.modelViewMatrix, false, sprite.modelViewMatrix.elements );

				sprite.matrixWorld.decompose( spritePosition, spriteRotation, spriteScale );

				scale[ 0 ] = spriteScale.x;
				scale[ 1 ] = spriteScale.y;

				var fogType = 0;

				if ( scene.fog && material.fog ) {

					fogType = sceneFogType;

				}

				if ( oldFogType !== fogType ) {

					gl.uniform1i( uniforms.fogType, fogType );
					oldFogType = fogType;

				}

				if ( material.map !== null ) {

					gl.uniform2f( uniforms.uvOffset, material.map.offset.x, material.map.offset.y );
					gl.uniform2f( uniforms.uvScale, material.map.repeat.x, material.map.repeat.y );

				} else {

					gl.uniform2f( uniforms.uvOffset, 0, 0 );
					gl.uniform2f( uniforms.uvScale, 1, 1 );

				}

				gl.uniform1f( uniforms.opacity, material.opacity );
				gl.uniform3f( uniforms.color, material.color.r, material.color.g, material.color.b );

				gl.uniform1f( uniforms.rotation, material.rotation );
				gl.uniform2fv( uniforms.scale, scale );

				state.setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );
				state.buffers.depth.setTest( material.depthTest );
				state.buffers.depth.setMask( material.depthWrite );
				state.buffers.color.setMask( material.colorWrite );

				textures.setTexture2D( material.map || texture, 0 );

				gl.drawElements( gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0 );

				sprite.onAfterRender( renderer, scene, camera, undefined, material, undefined );

			}

			// restore gl

			state.enable( gl.CULL_FACE );

			state.reset();

		};

		function createProgram() {

			var program = gl.createProgram();

			var vertexShader = gl.createShader( gl.VERTEX_SHADER );
			var fragmentShader = gl.createShader( gl.FRAGMENT_SHADER );

			gl.shaderSource( vertexShader, [

				'precision ' + capabilities.precision + ' float;',

				'#define SHADER_NAME ' + 'SpriteMaterial',

				'uniform mat4 modelViewMatrix;',
				'uniform mat4 projectionMatrix;',
				'uniform float rotation;',
				'uniform vec2 scale;',
				'uniform vec2 uvOffset;',
				'uniform vec2 uvScale;',

				'attribute vec2 position;',
				'attribute vec2 uv;',

				'varying vec2 vUV;',
				'varying float fogDepth;',

				'void main() {',

				'	vUV = uvOffset + uv * uvScale;',

				'	vec2 alignedPosition = position * scale;',

				'	vec2 rotatedPosition;',
				'	rotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;',
				'	rotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;',

				'	vec4 mvPosition;',

				'	mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );',
				'	mvPosition.xy += rotatedPosition;',

				'	gl_Position = projectionMatrix * mvPosition;',

				'	fogDepth = - mvPosition.z;',

				'}'

			].join( '\n' ) );

			gl.shaderSource( fragmentShader, [

				'precision ' + capabilities.precision + ' float;',

				'#define SHADER_NAME ' + 'SpriteMaterial',

				'uniform vec3 color;',
				'uniform sampler2D map;',
				'uniform float opacity;',

				'uniform int fogType;',
				'uniform vec3 fogColor;',
				'uniform float fogDensity;',
				'uniform float fogNear;',
				'uniform float fogFar;',
				'uniform float alphaTest;',

				'varying vec2 vUV;',
				'varying float fogDepth;',

				'void main() {',

				'	vec4 texture = texture2D( map, vUV );',

				'	gl_FragColor = vec4( color * texture.xyz, texture.a * opacity );',

				'	if ( gl_FragColor.a < alphaTest ) discard;',

				'	if ( fogType > 0 ) {',

				'		float fogFactor = 0.0;',

				'		if ( fogType == 1 ) {',

				'			fogFactor = smoothstep( fogNear, fogFar, fogDepth );',

				'		} else {',

				'			const float LOG2 = 1.442695;',
				'			fogFactor = exp2( - fogDensity * fogDensity * fogDepth * fogDepth * LOG2 );',
				'			fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );',

				'		}',

				'		gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );',

				'	}',

				'}'

			].join( '\n' ) );

			gl.compileShader( vertexShader );
			gl.compileShader( fragmentShader );

			gl.attachShader( program, vertexShader );
			gl.attachShader( program, fragmentShader );

			gl.linkProgram( program );

			return program;

		}

		function painterSortStable( a, b ) {

			if ( a.renderOrder !== b.renderOrder ) {

				return a.renderOrder - b.renderOrder;

			} else if ( a.z !== b.z ) {

				return b.z - a.z;

			} else {

				return b.id - a.id;

			}

		}

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author bhouston / http://clara.io
	 */

	function Frustum( p0, p1, p2, p3, p4, p5 ) {

		this.planes = [

			( p0 !== undefined ) ? p0 : new Plane(),
			( p1 !== undefined ) ? p1 : new Plane(),
			( p2 !== undefined ) ? p2 : new Plane(),
			( p3 !== undefined ) ? p3 : new Plane(),
			( p4 !== undefined ) ? p4 : new Plane(),
			( p5 !== undefined ) ? p5 : new Plane()

		];

	}

	Object.assign( Frustum.prototype, {

		set: function ( p0, p1, p2, p3, p4, p5 ) {

			var planes = this.planes;

			planes[ 0 ].copy( p0 );
			planes[ 1 ].copy( p1 );
			planes[ 2 ].copy( p2 );
			planes[ 3 ].copy( p3 );
			planes[ 4 ].copy( p4 );
			planes[ 5 ].copy( p5 );

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( frustum ) {

			var planes = this.planes;

			for ( var i = 0; i < 6; i ++ ) {

				planes[ i ].copy( frustum.planes[ i ] );

			}

			return this;

		},

		setFromMatrix: function ( m ) {

			var planes = this.planes;
			var me = m.elements;
			var me0 = me[ 0 ], me1 = me[ 1 ], me2 = me[ 2 ], me3 = me[ 3 ];
			var me4 = me[ 4 ], me5 = me[ 5 ], me6 = me[ 6 ], me7 = me[ 7 ];
			var me8 = me[ 8 ], me9 = me[ 9 ], me10 = me[ 10 ], me11 = me[ 11 ];
			var me12 = me[ 12 ], me13 = me[ 13 ], me14 = me[ 14 ], me15 = me[ 15 ];

			planes[ 0 ].setComponents( me3 - me0, me7 - me4, me11 - me8, me15 - me12 ).normalize();
			planes[ 1 ].setComponents( me3 + me0, me7 + me4, me11 + me8, me15 + me12 ).normalize();
			planes[ 2 ].setComponents( me3 + me1, me7 + me5, me11 + me9, me15 + me13 ).normalize();
			planes[ 3 ].setComponents( me3 - me1, me7 - me5, me11 - me9, me15 - me13 ).normalize();
			planes[ 4 ].setComponents( me3 - me2, me7 - me6, me11 - me10, me15 - me14 ).normalize();
			planes[ 5 ].setComponents( me3 + me2, me7 + me6, me11 + me10, me15 + me14 ).normalize();

			return this;

		},

		intersectsObject: function () {

			var sphere = new Sphere();

			return function intersectsObject( object ) {

				var geometry = object.geometry;

				if ( geometry.boundingSphere === null )
					geometry.computeBoundingSphere();

				sphere.copy( geometry.boundingSphere )
					.applyMatrix4( object.matrixWorld );

				return this.intersectsSphere( sphere );

			};

		}(),

		intersectsSprite: function () {

			var sphere = new Sphere();

			return function intersectsSprite( sprite ) {

				sphere.center.set( 0, 0, 0 );
				sphere.radius = 0.7071067811865476;
				sphere.applyMatrix4( sprite.matrixWorld );

				return this.intersectsSphere( sphere );

			};

		}(),

		intersectsSphere: function ( sphere ) {

			var planes = this.planes;
			var center = sphere.center;
			var negRadius = - sphere.radius;

			for ( var i = 0; i < 6; i ++ ) {

				var distance = planes[ i ].distanceToPoint( center );

				if ( distance < negRadius ) {

					return false;

				}

			}

			return true;

		},

		intersectsBox: function () {

			var p1 = new Vector3(),
				p2 = new Vector3();

			return function intersectsBox( box ) {

				var planes = this.planes;

				for ( var i = 0; i < 6; i ++ ) {

					var plane = planes[ i ];

					p1.x = plane.normal.x > 0 ? box.min.x : box.max.x;
					p2.x = plane.normal.x > 0 ? box.max.x : box.min.x;
					p1.y = plane.normal.y > 0 ? box.min.y : box.max.y;
					p2.y = plane.normal.y > 0 ? box.max.y : box.min.y;
					p1.z = plane.normal.z > 0 ? box.min.z : box.max.z;
					p2.z = plane.normal.z > 0 ? box.max.z : box.min.z;

					var d1 = plane.distanceToPoint( p1 );
					var d2 = plane.distanceToPoint( p2 );

					// if both outside plane, no intersection

					if ( d1 < 0 && d2 < 0 ) {

						return false;

					}

				}

				return true;

			};

		}(),

		containsPoint: function ( point ) {

			var planes = this.planes;

			for ( var i = 0; i < 6; i ++ ) {

				if ( planes[ i ].distanceToPoint( point ) < 0 ) {

					return false;

				}

			}

			return true;

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLShadowMap( _renderer, _objects, maxTextureSize ) {

		var _frustum = new Frustum(),
			_projScreenMatrix = new Matrix4(),

			_shadowMapSize = new Vector2(),
			_maxShadowMapSize = new Vector2( maxTextureSize, maxTextureSize ),

			_lookTarget = new Vector3(),
			_lightPositionWorld = new Vector3(),

			_MorphingFlag = 1,
			_SkinningFlag = 2,

			_NumberOfMaterialVariants = ( _MorphingFlag | _SkinningFlag ) + 1,

			_depthMaterials = new Array( _NumberOfMaterialVariants ),
			_distanceMaterials = new Array( _NumberOfMaterialVariants ),

			_materialCache = {};

		var cubeDirections = [
			new Vector3( 1, 0, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ),
			new Vector3( 0, 0, - 1 ), new Vector3( 0, 1, 0 ), new Vector3( 0, - 1, 0 )
		];

		var cubeUps = [
			new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ),
			new Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ),	new Vector3( 0, 0, - 1 )
		];

		var cube2DViewPorts = [
			new Vector4(), new Vector4(), new Vector4(),
			new Vector4(), new Vector4(), new Vector4()
		];

		// init

		for ( var i = 0; i !== _NumberOfMaterialVariants; ++ i ) {

			var useMorphing = ( i & _MorphingFlag ) !== 0;
			var useSkinning = ( i & _SkinningFlag ) !== 0;

			var depthMaterial = new MeshDepthMaterial( {

				depthPacking: RGBADepthPacking,

				morphTargets: useMorphing,
				skinning: useSkinning

			} );

			_depthMaterials[ i ] = depthMaterial;

			//

			var distanceMaterial = new MeshDistanceMaterial( {

				morphTargets: useMorphing,
				skinning: useSkinning

			} );

			_distanceMaterials[ i ] = distanceMaterial;

		}

		//

		var scope = this;

		this.enabled = false;

		this.autoUpdate = true;
		this.needsUpdate = false;

		this.type = PCFShadowMap;

		this.renderReverseSided = true;
		this.renderSingleSided = true;

		this.render = function ( lights, scene, camera ) {

			if ( scope.enabled === false ) return;
			if ( scope.autoUpdate === false && scope.needsUpdate === false ) return;

			if ( lights.length === 0 ) return;

			// TODO Clean up (needed in case of contextlost)
			var _gl = _renderer.context;
			var _state = _renderer.state;

			// Set GL state for depth map.
			_state.disable( _gl.BLEND );
			_state.buffers.color.setClear( 1, 1, 1, 1 );
			_state.buffers.depth.setTest( true );
			_state.setScissorTest( false );

			// render depth map

			var faceCount;

			for ( var i = 0, il = lights.length; i < il; i ++ ) {

				var light = lights[ i ];
				var shadow = light.shadow;
				var isPointLight = light && light.isPointLight;

				if ( shadow === undefined ) {

					console.warn( 'THREE.WebGLShadowMap:', light, 'has no shadow.' );
					continue;

				}

				var shadowCamera = shadow.camera;

				_shadowMapSize.copy( shadow.mapSize );
				_shadowMapSize.min( _maxShadowMapSize );

				if ( isPointLight ) {

					var vpWidth = _shadowMapSize.x;
					var vpHeight = _shadowMapSize.y;

					// These viewports map a cube-map onto a 2D texture with the
					// following orientation:
					//
					//  xzXZ
					//   y Y
					//
					// X - Positive x direction
					// x - Negative x direction
					// Y - Positive y direction
					// y - Negative y direction
					// Z - Positive z direction
					// z - Negative z direction

					// positive X
					cube2DViewPorts[ 0 ].set( vpWidth * 2, vpHeight, vpWidth, vpHeight );
					// negative X
					cube2DViewPorts[ 1 ].set( 0, vpHeight, vpWidth, vpHeight );
					// positive Z
					cube2DViewPorts[ 2 ].set( vpWidth * 3, vpHeight, vpWidth, vpHeight );
					// negative Z
					cube2DViewPorts[ 3 ].set( vpWidth, vpHeight, vpWidth, vpHeight );
					// positive Y
					cube2DViewPorts[ 4 ].set( vpWidth * 3, 0, vpWidth, vpHeight );
					// negative Y
					cube2DViewPorts[ 5 ].set( vpWidth, 0, vpWidth, vpHeight );

					_shadowMapSize.x *= 4.0;
					_shadowMapSize.y *= 2.0;

				}

				if ( shadow.map === null ) {

					var pars = { minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat };

					shadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );
					shadow.map.texture.name = light.name + ".shadowMap";

					shadowCamera.updateProjectionMatrix();

				}

				if ( shadow.isSpotLightShadow ) {

					shadow.update( light );

				}

				var shadowMap = shadow.map;
				var shadowMatrix = shadow.matrix;

				_lightPositionWorld.setFromMatrixPosition( light.matrixWorld );
				shadowCamera.position.copy( _lightPositionWorld );

				if ( isPointLight ) {

					faceCount = 6;

					// for point lights we set the shadow matrix to be a translation-only matrix
					// equal to inverse of the light's position

					shadowMatrix.makeTranslation( - _lightPositionWorld.x, - _lightPositionWorld.y, - _lightPositionWorld.z );

				} else {

					faceCount = 1;

					_lookTarget.setFromMatrixPosition( light.target.matrixWorld );
					shadowCamera.lookAt( _lookTarget );
					shadowCamera.updateMatrixWorld();

					// compute shadow matrix

					shadowMatrix.set(
						0.5, 0.0, 0.0, 0.5,
						0.0, 0.5, 0.0, 0.5,
						0.0, 0.0, 0.5, 0.5,
						0.0, 0.0, 0.0, 1.0
					);

					shadowMatrix.multiply( shadowCamera.projectionMatrix );
					shadowMatrix.multiply( shadowCamera.matrixWorldInverse );

				}

				_renderer.setRenderTarget( shadowMap );
				_renderer.clear();

				// render shadow map for each cube face (if omni-directional) or
				// run a single pass if not

				for ( var face = 0; face < faceCount; face ++ ) {

					if ( isPointLight ) {

						_lookTarget.copy( shadowCamera.position );
						_lookTarget.add( cubeDirections[ face ] );
						shadowCamera.up.copy( cubeUps[ face ] );
						shadowCamera.lookAt( _lookTarget );
						shadowCamera.updateMatrixWorld();

						var vpDimensions = cube2DViewPorts[ face ];
						_state.viewport( vpDimensions );

					}

					// update camera matrices and frustum

					_projScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );
					_frustum.setFromMatrix( _projScreenMatrix );

					// set object matrices & frustum culling

					renderObject( scene, camera, shadowCamera, isPointLight );

				}

			}

			scope.needsUpdate = false;

		};

		function getDepthMaterial( object, material, isPointLight, lightPositionWorld, shadowCameraNear, shadowCameraFar ) {

			var geometry = object.geometry;

			var result = null;

			var materialVariants = _depthMaterials;
			var customMaterial = object.customDepthMaterial;

			if ( isPointLight ) {

				materialVariants = _distanceMaterials;
				customMaterial = object.customDistanceMaterial;

			}

			if ( ! customMaterial ) {

				var useMorphing = false;

				if ( material.morphTargets ) {

					if ( geometry && geometry.isBufferGeometry ) {

						useMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;

					} else if ( geometry && geometry.isGeometry ) {

						useMorphing = geometry.morphTargets && geometry.morphTargets.length > 0;

					}

				}

				if ( object.isSkinnedMesh && material.skinning === false ) {

					console.warn( 'THREE.WebGLShadowMap: THREE.SkinnedMesh with material.skinning set to false:', object );

				}

				var useSkinning = object.isSkinnedMesh && material.skinning;

				var variantIndex = 0;

				if ( useMorphing ) variantIndex |= _MorphingFlag;
				if ( useSkinning ) variantIndex |= _SkinningFlag;

				result = materialVariants[ variantIndex ];

			} else {

				result = customMaterial;

			}

			if ( _renderer.localClippingEnabled &&
					material.clipShadows === true &&
					material.clippingPlanes.length !== 0 ) {

				// in this case we need a unique material instance reflecting the
				// appropriate state

				var keyA = result.uuid, keyB = material.uuid;

				var materialsForVariant = _materialCache[ keyA ];

				if ( materialsForVariant === undefined ) {

					materialsForVariant = {};
					_materialCache[ keyA ] = materialsForVariant;

				}

				var cachedMaterial = materialsForVariant[ keyB ];

				if ( cachedMaterial === undefined ) {

					cachedMaterial = result.clone();
					materialsForVariant[ keyB ] = cachedMaterial;

				}

				result = cachedMaterial;

			}

			result.visible = material.visible;
			result.wireframe = material.wireframe;

			var side = material.side;

			if ( scope.renderSingleSided && side == DoubleSide ) {

				side = FrontSide;

			}

			if ( scope.renderReverseSided ) {

				if ( side === FrontSide ) side = BackSide;
				else if ( side === BackSide ) side = FrontSide;

			}

			result.side = side;

			result.clipShadows = material.clipShadows;
			result.clippingPlanes = material.clippingPlanes;
			result.clipIntersection = material.clipIntersection;

			result.wireframeLinewidth = material.wireframeLinewidth;
			result.linewidth = material.linewidth;

			if ( isPointLight && result.isMeshDistanceMaterial ) {

				result.referencePosition.copy( lightPositionWorld );
				result.nearDistance = shadowCameraNear;
				result.farDistance = shadowCameraFar;

			}

			return result;

		}

		function renderObject( object, camera, shadowCamera, isPointLight ) {

			if ( object.visible === false ) return;

			var visible = object.layers.test( camera.layers );

			if ( visible && ( object.isMesh || object.isLine || object.isPoints ) ) {

				if ( object.castShadow && ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) ) {

					object.modelViewMatrix.multiplyMatrices( shadowCamera.matrixWorldInverse, object.matrixWorld );

					var geometry = _objects.update( object );
					var material = object.material;

					if ( Array.isArray( material ) ) {

						var groups = geometry.groups;

						for ( var k = 0, kl = groups.length; k < kl; k ++ ) {

							var group = groups[ k ];
							var groupMaterial = material[ group.materialIndex ];

							if ( groupMaterial && groupMaterial.visible ) {

								var depthMaterial = getDepthMaterial( object, groupMaterial, isPointLight, _lightPositionWorld, shadowCamera.near, shadowCamera.far );
								_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, group );

							}

						}

					} else if ( material.visible ) {

						var depthMaterial = getDepthMaterial( object, material, isPointLight, _lightPositionWorld, shadowCamera.near, shadowCamera.far );
						_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, null );

					}

				}

			}

			var children = object.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				renderObject( children[ i ], camera, shadowCamera, isPointLight );

			}

		}

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLAttributes( gl ) {

		var buffers = {};

		function createBuffer( attribute, bufferType ) {

			var array = attribute.array;
			var usage = attribute.dynamic ? gl.DYNAMIC_DRAW : gl.STATIC_DRAW;

			var buffer = gl.createBuffer();

			gl.bindBuffer( bufferType, buffer );
			gl.bufferData( bufferType, array, usage );

			attribute.onUploadCallback();

			var type = gl.FLOAT;

			if ( array instanceof Float32Array ) {

				type = gl.FLOAT;

			} else if ( array instanceof Float64Array ) {

				console.warn( 'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.' );

			} else if ( array instanceof Uint16Array ) {

				type = gl.UNSIGNED_SHORT;

			} else if ( array instanceof Int16Array ) {

				type = gl.SHORT;

			} else if ( array instanceof Uint32Array ) {

				type = gl.UNSIGNED_INT;

			} else if ( array instanceof Int32Array ) {

				type = gl.INT;

			} else if ( array instanceof Int8Array ) {

				type = gl.BYTE;

			} else if ( array instanceof Uint8Array ) {

				type = gl.UNSIGNED_BYTE;

			}

			return {
				buffer: buffer,
				type: type,
				bytesPerElement: array.BYTES_PER_ELEMENT,
				version: attribute.version
			};

		}

		function updateBuffer( buffer, attribute, bufferType ) {

			var array = attribute.array;
			var updateRange = attribute.updateRange;

			gl.bindBuffer( bufferType, buffer );

			if ( attribute.dynamic === false ) {

				gl.bufferData( bufferType, array, gl.STATIC_DRAW );

			} else if ( updateRange.count === - 1 ) {

				// Not using update ranges

				gl.bufferSubData( bufferType, 0, array );

			} else if ( updateRange.count === 0 ) {

				console.error( 'THREE.WebGLObjects.updateBuffer: dynamic THREE.BufferAttribute marked as needsUpdate but updateRange.count is 0, ensure you are using set methods or updating manually.' );

			} else {

				gl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,
					array.subarray( updateRange.offset, updateRange.offset + updateRange.count ) );

				updateRange.count = - 1; // reset range

			}

		}

		//

		function get( attribute ) {

			if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;

			return buffers[ attribute.uuid ];

		}

		function remove( attribute ) {

			if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;

			var data = buffers[ attribute.uuid ];

			if ( data ) {

				gl.deleteBuffer( data.buffer );

				delete buffers[ attribute.uuid ];

			}

		}

		function update( attribute, bufferType ) {

			if ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;

			var data = buffers[ attribute.uuid ];

			if ( data === undefined ) {

				buffers[ attribute.uuid ] = createBuffer( attribute, bufferType );

			} else if ( data.version < attribute.version ) {

				updateBuffer( data.buffer, attribute, bufferType );

				data.version = attribute.version;

			}

		}

		return {

			get: get,
			remove: remove,
			update: update

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// PlaneGeometry

	function PlaneGeometry( width, height, widthSegments, heightSegments ) {

		Geometry.call( this );

		this.type = 'PlaneGeometry';

		this.parameters = {
			width: width,
			height: height,
			widthSegments: widthSegments,
			heightSegments: heightSegments
		};

		this.fromBufferGeometry( new PlaneBufferGeometry( width, height, widthSegments, heightSegments ) );
		this.mergeVertices();

	}

	PlaneGeometry.prototype = Object.create( Geometry.prototype );
	PlaneGeometry.prototype.constructor = PlaneGeometry;

	// PlaneBufferGeometry

	function PlaneBufferGeometry( width, height, widthSegments, heightSegments ) {

		BufferGeometry.call( this );

		this.type = 'PlaneBufferGeometry';

		this.parameters = {
			width: width,
			height: height,
			widthSegments: widthSegments,
			heightSegments: heightSegments
		};

		width = width || 1;
		height = height || 1;

		var width_half = width / 2;
		var height_half = height / 2;

		var gridX = Math.floor( widthSegments ) || 1;
		var gridY = Math.floor( heightSegments ) || 1;

		var gridX1 = gridX + 1;
		var gridY1 = gridY + 1;

		var segment_width = width / gridX;
		var segment_height = height / gridY;

		var ix, iy;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// generate vertices, normals and uvs

		for ( iy = 0; iy < gridY1; iy ++ ) {

			var y = iy * segment_height - height_half;

			for ( ix = 0; ix < gridX1; ix ++ ) {

				var x = ix * segment_width - width_half;

				vertices.push( x, - y, 0 );

				normals.push( 0, 0, 1 );

				uvs.push( ix / gridX );
				uvs.push( 1 - ( iy / gridY ) );

			}

		}

		// indices

		for ( iy = 0; iy < gridY; iy ++ ) {

			for ( ix = 0; ix < gridX; ix ++ ) {

				var a = ix + gridX1 * iy;
				var b = ix + gridX1 * ( iy + 1 );
				var c = ( ix + 1 ) + gridX1 * ( iy + 1 );
				var d = ( ix + 1 ) + gridX1 * iy;

				// faces

				indices.push( a, b, d );
				indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

	}

	PlaneBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	PlaneBufferGeometry.prototype.constructor = PlaneBufferGeometry;

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLBackground( renderer, state, geometries, premultipliedAlpha ) {

		var clearColor = new Color( 0x000000 );
		var clearAlpha = 0;

		var planeCamera, planeMesh;
		var boxMesh;

		function render( renderList, scene, camera, forceClear ) {

			var background = scene.background;

			if ( background === null ) {

				setClear( clearColor, clearAlpha );

			} else if ( background && background.isColor ) {

				setClear( background, 1 );
				forceClear = true;

			}

			if ( renderer.autoClear || forceClear ) {

				renderer.clear( renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil );

			}

			if ( background && background.isCubeTexture ) {

				if ( boxMesh === undefined ) {

					boxMesh = new Mesh(
						new BoxBufferGeometry( 1, 1, 1 ),
						new ShaderMaterial( {
							uniforms: ShaderLib.cube.uniforms,
							vertexShader: ShaderLib.cube.vertexShader,
							fragmentShader: ShaderLib.cube.fragmentShader,
							side: BackSide,
							depthTest: true,
							depthWrite: false,
							fog: false
						} )
					);

					boxMesh.geometry.removeAttribute( 'normal' );
					boxMesh.geometry.removeAttribute( 'uv' );

					boxMesh.onBeforeRender = function ( renderer, scene, camera ) {

						this.matrixWorld.copyPosition( camera.matrixWorld );

					};

					geometries.update( boxMesh.geometry );

				}

				boxMesh.material.uniforms.tCube.value = background;

				renderList.push( boxMesh, boxMesh.geometry, boxMesh.material, 0, null );

			} else if ( background && background.isTexture ) {

				if ( planeCamera === undefined ) {

					planeCamera = new OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );

					planeMesh = new Mesh(
						new PlaneBufferGeometry( 2, 2 ),
						new MeshBasicMaterial( { depthTest: false, depthWrite: false, fog: false } )
					);

					geometries.update( planeMesh.geometry );

				}

				planeMesh.material.map = background;

				// TODO Push this to renderList

				renderer.renderBufferDirect( planeCamera, null, planeMesh.geometry, planeMesh.material, planeMesh, null );

			}

		}

		function setClear( color, alpha ) {

			state.buffers.color.setClear( color.r, color.g, color.b, alpha, premultipliedAlpha );

		}

		return {

			getClearColor: function () {

				return clearColor;

			},
			setClearColor: function ( color, alpha ) {

				clearColor.set( color );
				clearAlpha = alpha !== undefined ? alpha : 1;
				setClear( clearColor, clearAlpha );

			},
			getClearAlpha: function () {

				return clearAlpha;

			},
			setClearAlpha: function ( alpha ) {

				clearAlpha = alpha;
				setClear( clearColor, clearAlpha );

			},
			render: render

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function painterSortStable( a, b ) {

		if ( a.renderOrder !== b.renderOrder ) {

			return a.renderOrder - b.renderOrder;

		} else if ( a.program && b.program && a.program !== b.program ) {

			return a.program.id - b.program.id;

		} else if ( a.material.id !== b.material.id ) {

			return a.material.id - b.material.id;

		} else if ( a.z !== b.z ) {

			return a.z - b.z;

		} else {

			return a.id - b.id;

		}

	}

	function reversePainterSortStable( a, b ) {

		if ( a.renderOrder !== b.renderOrder ) {

			return a.renderOrder - b.renderOrder;

		} if ( a.z !== b.z ) {

			return b.z - a.z;

		} else {

			return a.id - b.id;

		}

	}

	function WebGLRenderList() {

		var renderItems = [];
		var renderItemsIndex = 0;

		var opaque = [];
		var transparent = [];

		function init() {

			renderItemsIndex = 0;

			opaque.length = 0;
			transparent.length = 0;

		}

		function push( object, geometry, material, z, group ) {

			var renderItem = renderItems[ renderItemsIndex ];

			if ( renderItem === undefined ) {

				renderItem = {
					id: object.id,
					object: object,
					geometry: geometry,
					material: material,
					program: material.program,
					renderOrder: object.renderOrder,
					z: z,
					group: group
				};

				renderItems[ renderItemsIndex ] = renderItem;

			} else {

				renderItem.id = object.id;
				renderItem.object = object;
				renderItem.geometry = geometry;
				renderItem.material = material;
				renderItem.program = material.program;
				renderItem.renderOrder = object.renderOrder;
				renderItem.z = z;
				renderItem.group = group;

			}

			( material.transparent === true ? transparent : opaque ).push( renderItem );

			renderItemsIndex ++;

		}

		function sort() {

			if ( opaque.length > 1 ) opaque.sort( painterSortStable );
			if ( transparent.length > 1 ) transparent.sort( reversePainterSortStable );

		}

		return {
			opaque: opaque,
			transparent: transparent,

			init: init,
			push: push,

			sort: sort
		};

	}

	function WebGLRenderLists() {

		var lists = {};

		function get( scene, camera ) {

			var hash = scene.id + ',' + camera.id;
			var list = lists[ hash ];

			if ( list === undefined ) {

				// console.log( 'THREE.WebGLRenderLists:', hash );

				list = new WebGLRenderList();
				lists[ hash ] = list;

			}

			return list;

		}

		function dispose() {

			lists = {};

		}

		return {
			get: get,
			dispose: dispose
		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function absNumericalSort( a, b ) {

		return Math.abs( b[ 1 ] ) - Math.abs( a[ 1 ] );

	}

	function WebGLMorphtargets( gl ) {

		var influencesList = {};
		var morphInfluences = new Float32Array( 8 );

		function update( object, geometry, material, program ) {

			var objectInfluences = object.morphTargetInfluences;

			var length = objectInfluences.length;

			var influences = influencesList[ geometry.id ];

			if ( influences === undefined ) {

				// initialise list

				influences = [];

				for ( var i = 0; i < length; i ++ ) {

					influences[ i ] = [ i, 0 ];

				}

				influencesList[ geometry.id ] = influences;

			}

			var morphTargets = material.morphTargets && geometry.morphAttributes.position;
			var morphNormals = material.morphNormals && geometry.morphAttributes.normal;

			// Remove current morphAttributes

			for ( var i = 0; i < length; i ++ ) {

				var influence = influences[ i ];

				if ( influence[ 1 ] !== 0 ) {

					if ( morphTargets ) geometry.removeAttribute( 'morphTarget' + i );
					if ( morphNormals ) geometry.removeAttribute( 'morphNormal' + i );

				}

			}

			// Collect influences

			for ( var i = 0; i < length; i ++ ) {

				var influence = influences[ i ];

				influence[ 0 ] = i;
				influence[ 1 ] = objectInfluences[ i ];

			}

			influences.sort( absNumericalSort );

			// Add morphAttributes

			for ( var i = 0; i < 8; i ++ ) {

				var influence = influences[ i ];

				if ( influence ) {

					var index = influence[ 0 ];
					var value = influence[ 1 ];

					if ( value ) {

						if ( morphTargets ) geometry.addAttribute( 'morphTarget' + i, morphTargets[ index ] );
						if ( morphNormals ) geometry.addAttribute( 'morphNormal' + i, morphNormals[ index ] );

						morphInfluences[ i ] = value;
						continue;

					}

				}

				morphInfluences[ i ] = 0;

			}

			program.getUniforms().setValue( gl, 'morphTargetInfluences', morphInfluences );

		}

		return {

			update: update

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLIndexedBufferRenderer( gl, extensions, infoRender ) {

		var mode;

		function setMode( value ) {

			mode = value;

		}

		var type, bytesPerElement;

		function setIndex( value ) {

			type = value.type;
			bytesPerElement = value.bytesPerElement;

		}

		function render( start, count ) {

			gl.drawElements( mode, count, type, start * bytesPerElement );

			infoRender.calls ++;
			infoRender.vertices += count;

			if ( mode === gl.TRIANGLES ) infoRender.faces += count / 3;
			else if ( mode === gl.POINTS ) infoRender.points += count;

		}

		function renderInstances( geometry, start, count ) {

			var extension = extensions.get( 'ANGLE_instanced_arrays' );

			if ( extension === null ) {

				console.error( 'THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
				return;

			}

			extension.drawElementsInstancedANGLE( mode, count, type, start * bytesPerElement, geometry.maxInstancedCount );

			infoRender.calls ++;
			infoRender.vertices += count * geometry.maxInstancedCount;

			if ( mode === gl.TRIANGLES ) infoRender.faces += geometry.maxInstancedCount * count / 3;
			else if ( mode === gl.POINTS ) infoRender.points += geometry.maxInstancedCount * count;

		}

		//

		this.setMode = setMode;
		this.setIndex = setIndex;
		this.render = render;
		this.renderInstances = renderInstances;

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLBufferRenderer( gl, extensions, infoRender ) {

		var mode;

		function setMode( value ) {

			mode = value;

		}

		function render( start, count ) {

			gl.drawArrays( mode, start, count );

			infoRender.calls ++;
			infoRender.vertices += count;

			if ( mode === gl.TRIANGLES ) infoRender.faces += count / 3;
			else if ( mode === gl.POINTS ) infoRender.points += count;

		}

		function renderInstances( geometry, start, count ) {

			var extension = extensions.get( 'ANGLE_instanced_arrays' );

			if ( extension === null ) {

				console.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
				return;

			}

			var position = geometry.attributes.position;

			if ( position.isInterleavedBufferAttribute ) {

				count = position.data.count;

				extension.drawArraysInstancedANGLE( mode, 0, count, geometry.maxInstancedCount );

			} else {

				extension.drawArraysInstancedANGLE( mode, start, count, geometry.maxInstancedCount );

			}

			infoRender.calls ++;
			infoRender.vertices += count * geometry.maxInstancedCount;

			if ( mode === gl.TRIANGLES ) infoRender.faces += geometry.maxInstancedCount * count / 3;
			else if ( mode === gl.POINTS ) infoRender.points += geometry.maxInstancedCount * count;

		}

		//

		this.setMode = setMode;
		this.render = render;
		this.renderInstances = renderInstances;

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLGeometries( gl, attributes, infoMemory ) {

		var geometries = {};
		var wireframeAttributes = {};

		function onGeometryDispose( event ) {

			var geometry = event.target;
			var buffergeometry = geometries[ geometry.id ];

			if ( buffergeometry.index !== null ) {

				attributes.remove( buffergeometry.index );

			}

			for ( var name in buffergeometry.attributes ) {

				attributes.remove( buffergeometry.attributes[ name ] );

			}

			geometry.removeEventListener( 'dispose', onGeometryDispose );

			delete geometries[ geometry.id ];

			// TODO Remove duplicate code

			var attribute = wireframeAttributes[ geometry.id ];

			if ( attribute ) {

				attributes.remove( attribute );
				delete wireframeAttributes[ geometry.id ];

			}

			attribute = wireframeAttributes[ buffergeometry.id ];

			if ( attribute ) {

				attributes.remove( attribute );
				delete wireframeAttributes[ buffergeometry.id ];

			}

			//

			infoMemory.geometries --;

		}

		function get( object, geometry ) {

			var buffergeometry = geometries[ geometry.id ];

			if ( buffergeometry ) return buffergeometry;

			geometry.addEventListener( 'dispose', onGeometryDispose );

			if ( geometry.isBufferGeometry ) {

				buffergeometry = geometry;

			} else if ( geometry.isGeometry ) {

				if ( geometry._bufferGeometry === undefined ) {

					geometry._bufferGeometry = new BufferGeometry().setFromObject( object );

				}

				buffergeometry = geometry._bufferGeometry;

			}

			geometries[ geometry.id ] = buffergeometry;

			infoMemory.geometries ++;

			return buffergeometry;

		}

		function update( geometry ) {

			var index = geometry.index;
			var geometryAttributes = geometry.attributes;

			if ( index !== null ) {

				attributes.update( index, gl.ELEMENT_ARRAY_BUFFER );

			}

			for ( var name in geometryAttributes ) {

				attributes.update( geometryAttributes[ name ], gl.ARRAY_BUFFER );

			}

			// morph targets

			var morphAttributes = geometry.morphAttributes;

			for ( var name in morphAttributes ) {

				var array = morphAttributes[ name ];

				for ( var i = 0, l = array.length; i < l; i ++ ) {

					attributes.update( array[ i ], gl.ARRAY_BUFFER );

				}

			}

		}

		function getWireframeAttribute( geometry ) {

			var attribute = wireframeAttributes[ geometry.id ];

			if ( attribute ) return attribute;

			var indices = [];

			var geometryIndex = geometry.index;
			var geometryAttributes = geometry.attributes;

			// console.time( 'wireframe' );

			if ( geometryIndex !== null ) {

				var array = geometryIndex.array;

				for ( var i = 0, l = array.length; i < l; i += 3 ) {

					var a = array[ i + 0 ];
					var b = array[ i + 1 ];
					var c = array[ i + 2 ];

					indices.push( a, b, b, c, c, a );

				}

			} else {

				var array = geometryAttributes.position.array;

				for ( var i = 0, l = ( array.length / 3 ) - 1; i < l; i += 3 ) {

					var a = i + 0;
					var b = i + 1;
					var c = i + 2;

					indices.push( a, b, b, c, c, a );

				}

			}

			// console.timeEnd( 'wireframe' );

			attribute = new ( arrayMax( indices ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( indices, 1 );

			attributes.update( attribute, gl.ELEMENT_ARRAY_BUFFER );

			wireframeAttributes[ geometry.id ] = attribute;

			return attribute;

		}

		return {

			get: get,
			update: update,

			getWireframeAttribute: getWireframeAttribute

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function UniformsCache() {

		var lights = {};

		return {

			get: function ( light ) {

				if ( lights[ light.id ] !== undefined ) {

					return lights[ light.id ];

				}

				var uniforms;

				switch ( light.type ) {

					case 'DirectionalLight':
						uniforms = {
							direction: new Vector3(),
							color: new Color(),

							shadow: false,
							shadowBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;

					case 'SpotLight':
						uniforms = {
							position: new Vector3(),
							direction: new Vector3(),
							color: new Color(),
							distance: 0,
							coneCos: 0,
							penumbraCos: 0,
							decay: 0,

							shadow: false,
							shadowBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;

					case 'PointLight':
						uniforms = {
							position: new Vector3(),
							color: new Color(),
							distance: 0,
							decay: 0,

							shadow: false,
							shadowBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2(),
							shadowCameraNear: 1,
							shadowCameraFar: 1000
						};
						break;

					case 'HemisphereLight':
						uniforms = {
							direction: new Vector3(),
							skyColor: new Color(),
							groundColor: new Color()
						};
						break;

					case 'RectAreaLight':
						uniforms = {
							color: new Color(),
							position: new Vector3(),
							halfWidth: new Vector3(),
							halfHeight: new Vector3()
							// TODO (abelnation): set RectAreaLight shadow uniforms
						};
						break;

				}

				lights[ light.id ] = uniforms;

				return uniforms;

			}

		};

	}

	function WebGLLights() {

		var cache = new UniformsCache();

		var state = {

			hash: '',

			ambient: [ 0, 0, 0 ],
			directional: [],
			directionalShadowMap: [],
			directionalShadowMatrix: [],
			spot: [],
			spotShadowMap: [],
			spotShadowMatrix: [],
			rectArea: [],
			point: [],
			pointShadowMap: [],
			pointShadowMatrix: [],
			hemi: []

		};

		var vector3 = new Vector3();
		var matrix4 = new Matrix4();
		var matrix42 = new Matrix4();

		function setup( lights, shadows, camera ) {

			var r = 0, g = 0, b = 0;

			var directionalLength = 0;
			var pointLength = 0;
			var spotLength = 0;
			var rectAreaLength = 0;
			var hemiLength = 0;

			var viewMatrix = camera.matrixWorldInverse;

			for ( var i = 0, l = lights.length; i < l; i ++ ) {

				var light = lights[ i ];

				var color = light.color;
				var intensity = light.intensity;
				var distance = light.distance;

				var shadowMap = ( light.shadow && light.shadow.map ) ? light.shadow.map.texture : null;

				if ( light.isAmbientLight ) {

					r += color.r * intensity;
					g += color.g * intensity;
					b += color.b * intensity;

				} else if ( light.isDirectionalLight ) {

					var uniforms = cache.get( light );

					uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
					uniforms.direction.setFromMatrixPosition( light.matrixWorld );
					vector3.setFromMatrixPosition( light.target.matrixWorld );
					uniforms.direction.sub( vector3 );
					uniforms.direction.transformDirection( viewMatrix );

					uniforms.shadow = light.castShadow;

					if ( light.castShadow ) {

						var shadow = light.shadow;

						uniforms.shadowBias = shadow.bias;
						uniforms.shadowRadius = shadow.radius;
						uniforms.shadowMapSize = shadow.mapSize;

					}

					state.directionalShadowMap[ directionalLength ] = shadowMap;
					state.directionalShadowMatrix[ directionalLength ] = light.shadow.matrix;
					state.directional[ directionalLength ] = uniforms;

					directionalLength ++;

				} else if ( light.isSpotLight ) {

					var uniforms = cache.get( light );

					uniforms.position.setFromMatrixPosition( light.matrixWorld );
					uniforms.position.applyMatrix4( viewMatrix );

					uniforms.color.copy( color ).multiplyScalar( intensity );
					uniforms.distance = distance;

					uniforms.direction.setFromMatrixPosition( light.matrixWorld );
					vector3.setFromMatrixPosition( light.target.matrixWorld );
					uniforms.direction.sub( vector3 );
					uniforms.direction.transformDirection( viewMatrix );

					uniforms.coneCos = Math.cos( light.angle );
					uniforms.penumbraCos = Math.cos( light.angle * ( 1 - light.penumbra ) );
					uniforms.decay = ( light.distance === 0 ) ? 0.0 : light.decay;

					uniforms.shadow = light.castShadow;

					if ( light.castShadow ) {

						var shadow = light.shadow;

						uniforms.shadowBias = shadow.bias;
						uniforms.shadowRadius = shadow.radius;
						uniforms.shadowMapSize = shadow.mapSize;

					}

					state.spotShadowMap[ spotLength ] = shadowMap;
					state.spotShadowMatrix[ spotLength ] = light.shadow.matrix;
					state.spot[ spotLength ] = uniforms;

					spotLength ++;

				} else if ( light.isRectAreaLight ) {

					var uniforms = cache.get( light );

					// (a) intensity controls irradiance of entire light
					uniforms.color
						.copy( color )
						.multiplyScalar( intensity / ( light.width * light.height ) );

					// (b) intensity controls the radiance per light area
					// uniforms.color.copy( color ).multiplyScalar( intensity );

					uniforms.position.setFromMatrixPosition( light.matrixWorld );
					uniforms.position.applyMatrix4( viewMatrix );

					// extract local rotation of light to derive width/height half vectors
					matrix42.identity();
					matrix4.copy( light.matrixWorld );
					matrix4.premultiply( viewMatrix );
					matrix42.extractRotation( matrix4 );

					uniforms.halfWidth.set( light.width * 0.5, 0.0, 0.0 );
					uniforms.halfHeight.set( 0.0, light.height * 0.5, 0.0 );

					uniforms.halfWidth.applyMatrix4( matrix42 );
					uniforms.halfHeight.applyMatrix4( matrix42 );

					// TODO (abelnation): RectAreaLight distance?
					// uniforms.distance = distance;

					state.rectArea[ rectAreaLength ] = uniforms;

					rectAreaLength ++;

				} else if ( light.isPointLight ) {

					var uniforms = cache.get( light );

					uniforms.position.setFromMatrixPosition( light.matrixWorld );
					uniforms.position.applyMatrix4( viewMatrix );

					uniforms.color.copy( light.color ).multiplyScalar( light.intensity );
					uniforms.distance = light.distance;
					uniforms.decay = ( light.distance === 0 ) ? 0.0 : light.decay;

					uniforms.shadow = light.castShadow;

					if ( light.castShadow ) {

						var shadow = light.shadow;

						uniforms.shadowBias = shadow.bias;
						uniforms.shadowRadius = shadow.radius;
						uniforms.shadowMapSize = shadow.mapSize;
						uniforms.shadowCameraNear = shadow.camera.near;
						uniforms.shadowCameraFar = shadow.camera.far;

					}

					state.pointShadowMap[ pointLength ] = shadowMap;
					state.pointShadowMatrix[ pointLength ] = light.shadow.matrix;
					state.point[ pointLength ] = uniforms;

					pointLength ++;

				} else if ( light.isHemisphereLight ) {

					var uniforms = cache.get( light );

					uniforms.direction.setFromMatrixPosition( light.matrixWorld );
					uniforms.direction.transformDirection( viewMatrix );
					uniforms.direction.normalize();

					uniforms.skyColor.copy( light.color ).multiplyScalar( intensity );
					uniforms.groundColor.copy( light.groundColor ).multiplyScalar( intensity );

					state.hemi[ hemiLength ] = uniforms;

					hemiLength ++;

				}

			}

			state.ambient[ 0 ] = r;
			state.ambient[ 1 ] = g;
			state.ambient[ 2 ] = b;

			state.directional.length = directionalLength;
			state.spot.length = spotLength;
			state.rectArea.length = rectAreaLength;
			state.point.length = pointLength;
			state.hemi.length = hemiLength;

			// TODO (sam-g-steel) why aren't we using join
			state.hash = directionalLength + ',' + pointLength + ',' + spotLength + ',' + rectAreaLength + ',' + hemiLength + ',' + shadows.length;

		}

		return {
			setup: setup,
			state: state
		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLObjects( geometries, infoRender ) {

		var updateList = {};

		function update( object ) {

			var frame = infoRender.frame;

			var geometry = object.geometry;
			var buffergeometry = geometries.get( object, geometry );

			// Update once per frame

			if ( updateList[ buffergeometry.id ] !== frame ) {

				if ( geometry.isGeometry ) {

					buffergeometry.updateFromObject( object );

				}

				geometries.update( buffergeometry );

				updateList[ buffergeometry.id ] = frame;

			}

			return buffergeometry;

		}

		function clear() {

			updateList = {};

		}

		return {

			update: update,
			clear: clear

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function addLineNumbers( string ) {

		var lines = string.split( '\n' );

		for ( var i = 0; i < lines.length; i ++ ) {

			lines[ i ] = ( i + 1 ) + ': ' + lines[ i ];

		}

		return lines.join( '\n' );

	}

	function WebGLShader( gl, type, string ) {

		var shader = gl.createShader( type );

		gl.shaderSource( shader, string );
		gl.compileShader( shader );

		if ( gl.getShaderParameter( shader, gl.COMPILE_STATUS ) === false ) {

			console.error( 'THREE.WebGLShader: Shader couldn\'t compile.' );

		}

		if ( gl.getShaderInfoLog( shader ) !== '' ) {

			console.warn( 'THREE.WebGLShader: gl.getShaderInfoLog()', type === gl.VERTEX_SHADER ? 'vertex' : 'fragment', gl.getShaderInfoLog( shader ), addLineNumbers( string ) );

		}

		// --enable-privileged-webgl-extension
		// console.log( type, gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );

		return shader;

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	var programIdCount = 0;

	function getEncodingComponents( encoding ) {

		switch ( encoding ) {

			case LinearEncoding:
				return [ 'Linear', '( value )' ];
			case sRGBEncoding:
				return [ 'sRGB', '( value )' ];
			case RGBEEncoding:
				return [ 'RGBE', '( value )' ];
			case RGBM7Encoding:
				return [ 'RGBM', '( value, 7.0 )' ];
			case RGBM16Encoding:
				return [ 'RGBM', '( value, 16.0 )' ];
			case RGBDEncoding:
				return [ 'RGBD', '( value, 256.0 )' ];
			case GammaEncoding:
				return [ 'Gamma', '( value, float( GAMMA_FACTOR ) )' ];
			default:
				throw new Error( 'unsupported encoding: ' + encoding );

		}

	}

	function getTexelDecodingFunction( functionName, encoding ) {

		var components = getEncodingComponents( encoding );
		return "vec4 " + functionName + "( vec4 value ) { return " + components[ 0 ] + "ToLinear" + components[ 1 ] + "; }";

	}

	function getTexelEncodingFunction( functionName, encoding ) {

		var components = getEncodingComponents( encoding );
		return "vec4 " + functionName + "( vec4 value ) { return LinearTo" + components[ 0 ] + components[ 1 ] + "; }";

	}

	function getToneMappingFunction( functionName, toneMapping ) {

		var toneMappingName;

		switch ( toneMapping ) {

			case LinearToneMapping:
				toneMappingName = "Linear";
				break;

			case ReinhardToneMapping:
				toneMappingName = "Reinhard";
				break;

			case Uncharted2ToneMapping:
				toneMappingName = "Uncharted2";
				break;

			case CineonToneMapping:
				toneMappingName = "OptimizedCineon";
				break;

			default:
				throw new Error( 'unsupported toneMapping: ' + toneMapping );

		}

		return "vec3 " + functionName + "( vec3 color ) { return " + toneMappingName + "ToneMapping( color ); }";

	}

	function generateExtensions( extensions, parameters, rendererExtensions ) {

		extensions = extensions || {};

		var chunks = [
			( extensions.derivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.normalMap || parameters.flatShading ) ? '#extension GL_OES_standard_derivatives : enable' : '',
			( extensions.fragDepth || parameters.logarithmicDepthBuffer ) && rendererExtensions.get( 'EXT_frag_depth' ) ? '#extension GL_EXT_frag_depth : enable' : '',
			( extensions.drawBuffers ) && rendererExtensions.get( 'WEBGL_draw_buffers' ) ? '#extension GL_EXT_draw_buffers : require' : '',
			( extensions.shaderTextureLOD || parameters.envMap ) && rendererExtensions.get( 'EXT_shader_texture_lod' ) ? '#extension GL_EXT_shader_texture_lod : enable' : ''
		];

		return chunks.filter( filterEmptyLine ).join( '\n' );

	}

	function generateDefines( defines ) {

		var chunks = [];

		for ( var name in defines ) {

			var value = defines[ name ];

			if ( value === false ) continue;

			chunks.push( '#define ' + name + ' ' + value );

		}

		return chunks.join( '\n' );

	}

	function fetchAttributeLocations( gl, program ) {

		var attributes = {};

		var n = gl.getProgramParameter( program, gl.ACTIVE_ATTRIBUTES );

		for ( var i = 0; i < n; i ++ ) {

			var info = gl.getActiveAttrib( program, i );
			var name = info.name;

			// console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );

			attributes[ name ] = gl.getAttribLocation( program, name );

		}

		return attributes;

	}

	function filterEmptyLine( string ) {

		return string !== '';

	}

	function replaceLightNums( string, parameters ) {

		return string
			.replace( /NUM_DIR_LIGHTS/g, parameters.numDirLights )
			.replace( /NUM_SPOT_LIGHTS/g, parameters.numSpotLights )
			.replace( /NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights )
			.replace( /NUM_POINT_LIGHTS/g, parameters.numPointLights )
			.replace( /NUM_HEMI_LIGHTS/g, parameters.numHemiLights );

	}

	function parseIncludes( string ) {

		var pattern = /^[ \t]*#include +<([\w\d.]+)>/gm;

		function replace( match, include ) {

			var replace = ShaderChunk[ include ];

			if ( replace === undefined ) {

				throw new Error( 'Can not resolve #include <' + include + '>' );

			}

			return parseIncludes( replace );

		}

		return string.replace( pattern, replace );

	}

	function unrollLoops( string ) {

		var pattern = /for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;

		function replace( match, start, end, snippet ) {

			var unroll = '';

			for ( var i = parseInt( start ); i < parseInt( end ); i ++ ) {

				unroll += snippet.replace( /\[ i \]/g, '[ ' + i + ' ]' );

			}

			return unroll;

		}

		return string.replace( pattern, replace );

	}

	function WebGLProgram( renderer, extensions, code, material, shader, parameters ) {

		var gl = renderer.context;

		var defines = material.defines;

		var vertexShader = shader.vertexShader;
		var fragmentShader = shader.fragmentShader;

		var shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';

		if ( parameters.shadowMapType === PCFShadowMap ) {

			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';

		} else if ( parameters.shadowMapType === PCFSoftShadowMap ) {

			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';

		}

		var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
		var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';
		var envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';

		if ( parameters.envMap ) {

			switch ( material.envMap.mapping ) {

				case CubeReflectionMapping:
				case CubeRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
					break;

				case CubeUVReflectionMapping:
				case CubeUVRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';
					break;

				case EquirectangularReflectionMapping:
				case EquirectangularRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_EQUIREC';
					break;

				case SphericalReflectionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_SPHERE';
					break;

			}

			switch ( material.envMap.mapping ) {

				case CubeRefractionMapping:
				case EquirectangularRefractionMapping:
					envMapModeDefine = 'ENVMAP_MODE_REFRACTION';
					break;

			}

			switch ( material.combine ) {

				case MultiplyOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
					break;

				case MixOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';
					break;

				case AddOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';
					break;

			}

		}

		var gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;

		// console.log( 'building new program ' );

		//

		var customExtensions = generateExtensions( material.extensions, parameters, extensions );

		var customDefines = generateDefines( defines );

		//

		var program = gl.createProgram();

		var prefixVertex, prefixFragment;

		if ( material.isRawShaderMaterial ) {

			prefixVertex = [

				customDefines

			].filter( filterEmptyLine ).join( '\n' );

			if ( prefixVertex.length > 0 ) {

				prefixVertex += '\n';

			}

			prefixFragment = [

				customExtensions,
				customDefines

			].filter( filterEmptyLine ).join( '\n' );

			if ( prefixFragment.length > 0 ) {

				prefixFragment += '\n';

			}

		} else {

			prefixVertex = [

				'precision ' + parameters.precision + ' float;',
				'precision ' + parameters.precision + ' int;',

				'#define SHADER_NAME ' + shader.name,

				customDefines,

				parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',

				'#define GAMMA_FACTOR ' + gammaFactorDefine,

				'#define MAX_BONES ' + parameters.maxBones,
				( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
				( parameters.useFog && parameters.fogExp ) ? '#define FOG_EXP2' : '',

				parameters.map ? '#define USE_MAP' : '',
				parameters.envMap ? '#define USE_ENVMAP' : '',
				parameters.envMap ? '#define ' + envMapModeDefine : '',
				parameters.lightMap ? '#define USE_LIGHTMAP' : '',
				parameters.aoMap ? '#define USE_AOMAP' : '',
				parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
				parameters.bumpMap ? '#define USE_BUMPMAP' : '',
				parameters.normalMap ? '#define USE_NORMALMAP' : '',
				parameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '',
				parameters.specularMap ? '#define USE_SPECULARMAP' : '',
				parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
				parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
				parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
				parameters.vertexColors ? '#define USE_COLOR' : '',

				parameters.flatShading ? '#define FLAT_SHADED' : '',

				parameters.skinning ? '#define USE_SKINNING' : '',
				parameters.useVertexTexture ? '#define BONE_TEXTURE' : '',

				parameters.morphTargets ? '#define USE_MORPHTARGETS' : '',
				parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',
				parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
				parameters.flipSided ? '#define FLIP_SIDED' : '',

				'#define NUM_CLIPPING_PLANES ' + parameters.numClippingPlanes,

				parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
				parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',

				parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',

				parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
				parameters.logarithmicDepthBuffer && extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',

				'uniform mat4 modelMatrix;',
				'uniform mat4 modelViewMatrix;',
				'uniform mat4 projectionMatrix;',
				'uniform mat4 viewMatrix;',
				'uniform mat3 normalMatrix;',
				'uniform vec3 cameraPosition;',

				'attribute vec3 position;',
				'attribute vec3 normal;',
				'attribute vec2 uv;',

				'#ifdef USE_COLOR',

				'	attribute vec3 color;',

				'#endif',

				'#ifdef USE_MORPHTARGETS',

				'	attribute vec3 morphTarget0;',
				'	attribute vec3 morphTarget1;',
				'	attribute vec3 morphTarget2;',
				'	attribute vec3 morphTarget3;',

				'	#ifdef USE_MORPHNORMALS',

				'		attribute vec3 morphNormal0;',
				'		attribute vec3 morphNormal1;',
				'		attribute vec3 morphNormal2;',
				'		attribute vec3 morphNormal3;',

				'	#else',

				'		attribute vec3 morphTarget4;',
				'		attribute vec3 morphTarget5;',
				'		attribute vec3 morphTarget6;',
				'		attribute vec3 morphTarget7;',

				'	#endif',

				'#endif',

				'#ifdef USE_SKINNING',

				'	attribute vec4 skinIndex;',
				'	attribute vec4 skinWeight;',

				'#endif',

				'\n'

			].filter( filterEmptyLine ).join( '\n' );

			prefixFragment = [

				customExtensions,

				'precision ' + parameters.precision + ' float;',
				'precision ' + parameters.precision + ' int;',

				'#define SHADER_NAME ' + shader.name,

				customDefines,

				parameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest : '',

				'#define GAMMA_FACTOR ' + gammaFactorDefine,

				( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
				( parameters.useFog && parameters.fogExp ) ? '#define FOG_EXP2' : '',

				parameters.map ? '#define USE_MAP' : '',
				parameters.envMap ? '#define USE_ENVMAP' : '',
				parameters.envMap ? '#define ' + envMapTypeDefine : '',
				parameters.envMap ? '#define ' + envMapModeDefine : '',
				parameters.envMap ? '#define ' + envMapBlendingDefine : '',
				parameters.lightMap ? '#define USE_LIGHTMAP' : '',
				parameters.aoMap ? '#define USE_AOMAP' : '',
				parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',
				parameters.bumpMap ? '#define USE_BUMPMAP' : '',
				parameters.normalMap ? '#define USE_NORMALMAP' : '',
				parameters.specularMap ? '#define USE_SPECULARMAP' : '',
				parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',
				parameters.metalnessMap ? '#define USE_METALNESSMAP' : '',
				parameters.alphaMap ? '#define USE_ALPHAMAP' : '',
				parameters.vertexColors ? '#define USE_COLOR' : '',

				parameters.gradientMap ? '#define USE_GRADIENTMAP' : '',

				parameters.flatShading ? '#define FLAT_SHADED' : '',

				parameters.doubleSided ? '#define DOUBLE_SIDED' : '',
				parameters.flipSided ? '#define FLIP_SIDED' : '',

				'#define NUM_CLIPPING_PLANES ' + parameters.numClippingPlanes,
				'#define UNION_CLIPPING_PLANES ' + ( parameters.numClippingPlanes - parameters.numClipIntersection ),

				parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',
				parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',

				parameters.premultipliedAlpha ? "#define PREMULTIPLIED_ALPHA" : '',

				parameters.physicallyCorrectLights ? "#define PHYSICALLY_CORRECT_LIGHTS" : '',

				parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
				parameters.logarithmicDepthBuffer && extensions.get( 'EXT_frag_depth' ) ? '#define USE_LOGDEPTHBUF_EXT' : '',

				parameters.envMap && extensions.get( 'EXT_shader_texture_lod' ) ? '#define TEXTURE_LOD_EXT' : '',

				'uniform mat4 viewMatrix;',
				'uniform vec3 cameraPosition;',

				( parameters.toneMapping !== NoToneMapping ) ? "#define TONE_MAPPING" : '',
				( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '', // this code is required here because it is used by the toneMapping() function defined below
				( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( "toneMapping", parameters.toneMapping ) : '',

				parameters.dithering ? '#define DITHERING' : '',

				( parameters.outputEncoding || parameters.mapEncoding || parameters.envMapEncoding || parameters.emissiveMapEncoding ) ? ShaderChunk[ 'encodings_pars_fragment' ] : '', // this code is required here because it is used by the various encoding/decoding function defined below
				parameters.mapEncoding ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',
				parameters.envMapEncoding ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',
				parameters.emissiveMapEncoding ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',
				parameters.outputEncoding ? getTexelEncodingFunction( "linearToOutputTexel", parameters.outputEncoding ) : '',

				parameters.depthPacking ? "#define DEPTH_PACKING " + material.depthPacking : '',

				'\n'

			].filter( filterEmptyLine ).join( '\n' );

		}

		vertexShader = parseIncludes( vertexShader );
		vertexShader = replaceLightNums( vertexShader, parameters );

		fragmentShader = parseIncludes( fragmentShader );
		fragmentShader = replaceLightNums( fragmentShader, parameters );

		if ( ! material.isShaderMaterial ) {

			vertexShader = unrollLoops( vertexShader );
			fragmentShader = unrollLoops( fragmentShader );

		}

		var vertexGlsl = prefixVertex + vertexShader;
		var fragmentGlsl = prefixFragment + fragmentShader;

		// console.log( '*VERTEX*', vertexGlsl );
		// console.log( '*FRAGMENT*', fragmentGlsl );

		var glVertexShader = WebGLShader( gl, gl.VERTEX_SHADER, vertexGlsl );
		var glFragmentShader = WebGLShader( gl, gl.FRAGMENT_SHADER, fragmentGlsl );

		gl.attachShader( program, glVertexShader );
		gl.attachShader( program, glFragmentShader );

		// Force a particular attribute to index 0.

		if ( material.index0AttributeName !== undefined ) {

			gl.bindAttribLocation( program, 0, material.index0AttributeName );

		} else if ( parameters.morphTargets === true ) {

			// programs with morphTargets displace position out of attribute 0
			gl.bindAttribLocation( program, 0, 'position' );

		}

		gl.linkProgram( program );

		var programLog = gl.getProgramInfoLog( program );
		var vertexLog = gl.getShaderInfoLog( glVertexShader );
		var fragmentLog = gl.getShaderInfoLog( glFragmentShader );

		var runnable = true;
		var haveDiagnostics = true;

		// console.log( '**VERTEX**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glVertexShader ) );
		// console.log( '**FRAGMENT**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glFragmentShader ) );

		if ( gl.getProgramParameter( program, gl.LINK_STATUS ) === false ) {

			runnable = false;

			console.error( 'THREE.WebGLProgram: shader error: ', gl.getError(), 'gl.VALIDATE_STATUS', gl.getProgramParameter( program, gl.VALIDATE_STATUS ), 'gl.getProgramInfoLog', programLog, vertexLog, fragmentLog );

		} else if ( programLog !== '' ) {

			console.warn( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLog );

		} else if ( vertexLog === '' || fragmentLog === '' ) {

			haveDiagnostics = false;

		}

		if ( haveDiagnostics ) {

			this.diagnostics = {

				runnable: runnable,
				material: material,

				programLog: programLog,

				vertexShader: {

					log: vertexLog,
					prefix: prefixVertex

				},

				fragmentShader: {

					log: fragmentLog,
					prefix: prefixFragment

				}

			};

		}

		// clean up

		gl.deleteShader( glVertexShader );
		gl.deleteShader( glFragmentShader );

		// set up caching for uniform locations

		var cachedUniforms;

		this.getUniforms = function () {

			if ( cachedUniforms === undefined ) {

				cachedUniforms = new WebGLUniforms( gl, program, renderer );

			}

			return cachedUniforms;

		};

		// set up caching for attribute locations

		var cachedAttributes;

		this.getAttributes = function () {

			if ( cachedAttributes === undefined ) {

				cachedAttributes = fetchAttributeLocations( gl, program );

			}

			return cachedAttributes;

		};

		// free resource

		this.destroy = function () {

			gl.deleteProgram( program );
			this.program = undefined;

		};

		// DEPRECATED

		Object.defineProperties( this, {

			uniforms: {
				get: function () {

					console.warn( 'THREE.WebGLProgram: .uniforms is now .getUniforms().' );
					return this.getUniforms();

				}
			},

			attributes: {
				get: function () {

					console.warn( 'THREE.WebGLProgram: .attributes is now .getAttributes().' );
					return this.getAttributes();

				}
			}

		} );


		//

		this.id = programIdCount ++;
		this.code = code;
		this.usedTimes = 1;
		this.program = program;
		this.vertexShader = glVertexShader;
		this.fragmentShader = glFragmentShader;

		return this;

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLPrograms( renderer, extensions, capabilities ) {

		var programs = [];

		var shaderIDs = {
			MeshDepthMaterial: 'depth',
			MeshDistanceMaterial: 'distanceRGBA',
			MeshNormalMaterial: 'normal',
			MeshBasicMaterial: 'basic',
			MeshLambertMaterial: 'lambert',
			MeshPhongMaterial: 'phong',
			MeshToonMaterial: 'phong',
			MeshStandardMaterial: 'physical',
			MeshPhysicalMaterial: 'physical',
			LineBasicMaterial: 'basic',
			LineDashedMaterial: 'dashed',
			PointsMaterial: 'points',
			ShadowMaterial: 'shadow'
		};

		var parameterNames = [
			"precision", "supportsVertexTextures", "map", "mapEncoding", "envMap", "envMapMode", "envMapEncoding",
			"lightMap", "aoMap", "emissiveMap", "emissiveMapEncoding", "bumpMap", "normalMap", "displacementMap", "specularMap",
			"roughnessMap", "metalnessMap", "gradientMap",
			"alphaMap", "combine", "vertexColors", "fog", "useFog", "fogExp",
			"flatShading", "sizeAttenuation", "logarithmicDepthBuffer", "skinning",
			"maxBones", "useVertexTexture", "morphTargets", "morphNormals",
			"maxMorphTargets", "maxMorphNormals", "premultipliedAlpha",
			"numDirLights", "numPointLights", "numSpotLights", "numHemiLights", "numRectAreaLights",
			"shadowMapEnabled", "shadowMapType", "toneMapping", 'physicallyCorrectLights',
			"alphaTest", "doubleSided", "flipSided", "numClippingPlanes", "numClipIntersection", "depthPacking", "dithering"
		];


		function allocateBones( object ) {

			var skeleton = object.skeleton;
			var bones = skeleton.bones;

			if ( capabilities.floatVertexTextures ) {

				return 1024;

			} else {

				// default for when object is not specified
				// ( for example when prebuilding shader to be used with multiple objects )
				//
				//  - leave some extra space for other uniforms
				//  - limit here is ANGLE's 254 max uniform vectors
				//    (up to 54 should be safe)

				var nVertexUniforms = capabilities.maxVertexUniforms;
				var nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );

				var maxBones = Math.min( nVertexMatrices, bones.length );

				if ( maxBones < bones.length ) {

					console.warn( 'THREE.WebGLRenderer: Skeleton has ' + bones.length + ' bones. This GPU supports ' + maxBones + '.' );
					return 0;

				}

				return maxBones;

			}

		}

		function getTextureEncodingFromMap( map, gammaOverrideLinear ) {

			var encoding;

			if ( ! map ) {

				encoding = LinearEncoding;

			} else if ( map.isTexture ) {

				encoding = map.encoding;

			} else if ( map.isWebGLRenderTarget ) {

				console.warn( "THREE.WebGLPrograms.getTextureEncodingFromMap: don't use render targets as textures. Use their .texture property instead." );
				encoding = map.texture.encoding;

			}

			// add backwards compatibility for WebGLRenderer.gammaInput/gammaOutput parameter, should probably be removed at some point.
			if ( encoding === LinearEncoding && gammaOverrideLinear ) {

				encoding = GammaEncoding;

			}

			return encoding;

		}

		this.getParameters = function ( material, lights, shadows, fog, nClipPlanes, nClipIntersection, object ) {

			var shaderID = shaderIDs[ material.type ];

			// heuristics to create shader parameters according to lights in the scene
			// (not to blow over maxLights budget)

			var maxBones = object.isSkinnedMesh ? allocateBones( object ) : 0;
			var precision = capabilities.precision;

			if ( material.precision !== null ) {

				precision = capabilities.getMaxPrecision( material.precision );

				if ( precision !== material.precision ) {

					console.warn( 'THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.' );

				}

			}

			var currentRenderTarget = renderer.getRenderTarget();

			var parameters = {

				shaderID: shaderID,

				precision: precision,
				supportsVertexTextures: capabilities.vertexTextures,
				outputEncoding: getTextureEncodingFromMap( ( ! currentRenderTarget ) ? null : currentRenderTarget.texture, renderer.gammaOutput ),
				map: !! material.map,
				mapEncoding: getTextureEncodingFromMap( material.map, renderer.gammaInput ),
				envMap: !! material.envMap,
				envMapMode: material.envMap && material.envMap.mapping,
				envMapEncoding: getTextureEncodingFromMap( material.envMap, renderer.gammaInput ),
				envMapCubeUV: ( !! material.envMap ) && ( ( material.envMap.mapping === CubeUVReflectionMapping ) || ( material.envMap.mapping === CubeUVRefractionMapping ) ),
				lightMap: !! material.lightMap,
				aoMap: !! material.aoMap,
				emissiveMap: !! material.emissiveMap,
				emissiveMapEncoding: getTextureEncodingFromMap( material.emissiveMap, renderer.gammaInput ),
				bumpMap: !! material.bumpMap,
				normalMap: !! material.normalMap,
				displacementMap: !! material.displacementMap,
				roughnessMap: !! material.roughnessMap,
				metalnessMap: !! material.metalnessMap,
				specularMap: !! material.specularMap,
				alphaMap: !! material.alphaMap,

				gradientMap: !! material.gradientMap,

				combine: material.combine,

				vertexColors: material.vertexColors,

				fog: !! fog,
				useFog: material.fog,
				fogExp: ( fog && fog.isFogExp2 ),

				flatShading: material.flatShading,

				sizeAttenuation: material.sizeAttenuation,
				logarithmicDepthBuffer: capabilities.logarithmicDepthBuffer,

				skinning: material.skinning && maxBones > 0,
				maxBones: maxBones,
				useVertexTexture: capabilities.floatVertexTextures,

				morphTargets: material.morphTargets,
				morphNormals: material.morphNormals,
				maxMorphTargets: renderer.maxMorphTargets,
				maxMorphNormals: renderer.maxMorphNormals,

				numDirLights: lights.directional.length,
				numPointLights: lights.point.length,
				numSpotLights: lights.spot.length,
				numRectAreaLights: lights.rectArea.length,
				numHemiLights: lights.hemi.length,

				numClippingPlanes: nClipPlanes,
				numClipIntersection: nClipIntersection,

				dithering: material.dithering,

				shadowMapEnabled: renderer.shadowMap.enabled && object.receiveShadow && shadows.length > 0,
				shadowMapType: renderer.shadowMap.type,

				toneMapping: renderer.toneMapping,
				physicallyCorrectLights: renderer.physicallyCorrectLights,

				premultipliedAlpha: material.premultipliedAlpha,

				alphaTest: material.alphaTest,
				doubleSided: material.side === DoubleSide,
				flipSided: material.side === BackSide,

				depthPacking: ( material.depthPacking !== undefined ) ? material.depthPacking : false

			};

			return parameters;

		};

		this.getProgramCode = function ( material, parameters ) {

			var array = [];

			if ( parameters.shaderID ) {

				array.push( parameters.shaderID );

			} else {

				array.push( material.fragmentShader );
				array.push( material.vertexShader );

			}

			if ( material.defines !== undefined ) {

				for ( var name in material.defines ) {

					array.push( name );
					array.push( material.defines[ name ] );

				}

			}

			for ( var i = 0; i < parameterNames.length; i ++ ) {

				array.push( parameters[ parameterNames[ i ] ] );

			}

			array.push( material.onBeforeCompile.toString() );

			array.push( renderer.gammaOutput );

			return array.join();

		};

		this.acquireProgram = function ( material, shader, parameters, code ) {

			var program;

			// Check if code has been already compiled
			for ( var p = 0, pl = programs.length; p < pl; p ++ ) {

				var programInfo = programs[ p ];

				if ( programInfo.code === code ) {

					program = programInfo;
					++ program.usedTimes;

					break;

				}

			}

			if ( program === undefined ) {

				program = new WebGLProgram( renderer, extensions, code, material, shader, parameters );
				programs.push( program );

			}

			return program;

		};

		this.releaseProgram = function ( program ) {

			if ( -- program.usedTimes === 0 ) {

				// Remove from unordered set
				var i = programs.indexOf( program );
				programs[ i ] = programs[ programs.length - 1 ];
				programs.pop();

				// Free WebGL resources
				program.destroy();

			}

		};

		// Exposed for resource monitoring & error feedback via renderer.info:
		this.programs = programs;

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLTextures( _gl, extensions, state, properties, capabilities, utils, infoMemory ) {

		var _isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && _gl instanceof window.WebGL2RenderingContext );

		//

		function clampToMaxSize( image, maxSize ) {

			if ( image.width > maxSize || image.height > maxSize ) {

				// Warning: Scaling through the canvas will only work with images that use
				// premultiplied alpha.

				var scale = maxSize / Math.max( image.width, image.height );

				var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
				canvas.width = Math.floor( image.width * scale );
				canvas.height = Math.floor( image.height * scale );

				var context = canvas.getContext( '2d' );
				context.drawImage( image, 0, 0, image.width, image.height, 0, 0, canvas.width, canvas.height );

				console.warn( 'THREE.WebGLRenderer: image is too big (' + image.width + 'x' + image.height + '). Resized to ' + canvas.width + 'x' + canvas.height, image );

				return canvas;

			}

			return image;

		}

		function isPowerOfTwo( image ) {

			return _Math.isPowerOfTwo( image.width ) && _Math.isPowerOfTwo( image.height );

		}

		function makePowerOfTwo( image ) {

			if ( image instanceof HTMLImageElement || image instanceof HTMLCanvasElement || image instanceof ImageBitmap ) {

				var canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
				canvas.width = _Math.floorPowerOfTwo( image.width );
				canvas.height = _Math.floorPowerOfTwo( image.height );

				var context = canvas.getContext( '2d' );
				context.drawImage( image, 0, 0, canvas.width, canvas.height );

				console.warn( 'THREE.WebGLRenderer: image is not power of two (' + image.width + 'x' + image.height + '). Resized to ' + canvas.width + 'x' + canvas.height, image );

				return canvas;

			}

			return image;

		}

		function textureNeedsPowerOfTwo( texture ) {

			return ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) ||
				( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter );

		}

		function textureNeedsGenerateMipmaps( texture, isPowerOfTwo ) {

			return texture.generateMipmaps && isPowerOfTwo &&
				texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;

		}

		// Fallback filters for non-power-of-2 textures

		function filterFallback( f ) {

			if ( f === NearestFilter || f === NearestMipMapNearestFilter || f === NearestMipMapLinearFilter ) {

				return _gl.NEAREST;

			}

			return _gl.LINEAR;

		}

		//

		function onTextureDispose( event ) {

			var texture = event.target;

			texture.removeEventListener( 'dispose', onTextureDispose );

			deallocateTexture( texture );

			infoMemory.textures --;


		}

		function onRenderTargetDispose( event ) {

			var renderTarget = event.target;

			renderTarget.removeEventListener( 'dispose', onRenderTargetDispose );

			deallocateRenderTarget( renderTarget );

			infoMemory.textures --;

		}

		//

		function deallocateTexture( texture ) {

			var textureProperties = properties.get( texture );

			if ( texture.image && textureProperties.__image__webglTextureCube ) {

				// cube texture

				_gl.deleteTexture( textureProperties.__image__webglTextureCube );

			} else {

				// 2D texture

				if ( textureProperties.__webglInit === undefined ) return;

				_gl.deleteTexture( textureProperties.__webglTexture );

			}

			// remove all webgl properties
			properties.remove( texture );

		}

		function deallocateRenderTarget( renderTarget ) {

			var renderTargetProperties = properties.get( renderTarget );
			var textureProperties = properties.get( renderTarget.texture );

			if ( ! renderTarget ) return;

			if ( textureProperties.__webglTexture !== undefined ) {

				_gl.deleteTexture( textureProperties.__webglTexture );

			}

			if ( renderTarget.depthTexture ) {

				renderTarget.depthTexture.dispose();

			}

			if ( renderTarget.isWebGLRenderTargetCube ) {

				for ( var i = 0; i < 6; i ++ ) {

					_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );
					if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );

				}

			} else {

				_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );
				if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );

			}

			properties.remove( renderTarget.texture );
			properties.remove( renderTarget );

		}

		//



		function setTexture2D( texture, slot ) {

			var textureProperties = properties.get( texture );

			if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

				var image = texture.image;

				if ( image === undefined ) {

					console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is undefined', texture );

				} else if ( image.complete === false ) {

					console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete', texture );

				} else {

					uploadTexture( textureProperties, texture, slot );
					return;

				}

			}

			state.activeTexture( _gl.TEXTURE0 + slot );
			state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );

		}

		function setTextureCube( texture, slot ) {

			var textureProperties = properties.get( texture );

			if ( texture.image.length === 6 ) {

				if ( texture.version > 0 && textureProperties.__version !== texture.version ) {

					if ( ! textureProperties.__image__webglTextureCube ) {

						texture.addEventListener( 'dispose', onTextureDispose );

						textureProperties.__image__webglTextureCube = _gl.createTexture();

						infoMemory.textures ++;

					}

					state.activeTexture( _gl.TEXTURE0 + slot );
					state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__image__webglTextureCube );

					_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );

					var isCompressed = ( texture && texture.isCompressedTexture );
					var isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );

					var cubeImage = [];

					for ( var i = 0; i < 6; i ++ ) {

						if ( ! isCompressed && ! isDataTexture ) {

							cubeImage[ i ] = clampToMaxSize( texture.image[ i ], capabilities.maxCubemapSize );

						} else {

							cubeImage[ i ] = isDataTexture ? texture.image[ i ].image : texture.image[ i ];

						}

					}

					var image = cubeImage[ 0 ],
						isPowerOfTwoImage = isPowerOfTwo( image ),
						glFormat = utils.convert( texture.format ),
						glType = utils.convert( texture.type );

					setTextureParameters( _gl.TEXTURE_CUBE_MAP, texture, isPowerOfTwoImage );

					for ( var i = 0; i < 6; i ++ ) {

						if ( ! isCompressed ) {

							if ( isDataTexture ) {

								state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, cubeImage[ i ].width, cubeImage[ i ].height, 0, glFormat, glType, cubeImage[ i ].data );

							} else {

								state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, glFormat, glType, cubeImage[ i ] );

							}

						} else {

							var mipmap, mipmaps = cubeImage[ i ].mipmaps;

							for ( var j = 0, jl = mipmaps.length; j < jl; j ++ ) {

								mipmap = mipmaps[ j ];

								if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {

									if ( state.getCompressedTextureFormats().indexOf( glFormat ) > - 1 ) {

										state.compressedTexImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );

									} else {

										console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()' );

									}

								} else {

									state.texImage2D( _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

								}

							}

						}

					}

					if ( textureNeedsGenerateMipmaps( texture, isPowerOfTwoImage ) ) {

						_gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );

					}

					textureProperties.__version = texture.version;

					if ( texture.onUpdate ) texture.onUpdate( texture );

				} else {

					state.activeTexture( _gl.TEXTURE0 + slot );
					state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__image__webglTextureCube );

				}

			}

		}

		function setTextureCubeDynamic( texture, slot ) {

			state.activeTexture( _gl.TEXTURE0 + slot );
			state.bindTexture( _gl.TEXTURE_CUBE_MAP, properties.get( texture ).__webglTexture );

		}

		function setTextureParameters( textureType, texture, isPowerOfTwoImage ) {

			var extension;

			if ( isPowerOfTwoImage ) {

				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, utils.convert( texture.wrapS ) );
				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, utils.convert( texture.wrapT ) );

				_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, utils.convert( texture.magFilter ) );
				_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, utils.convert( texture.minFilter ) );

			} else {

				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE );
				_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE );

				if ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) {

					console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.', texture );

				}

				_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, filterFallback( texture.magFilter ) );
				_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, filterFallback( texture.minFilter ) );

				if ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) {

					console.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.', texture );

				}

			}

			extension = extensions.get( 'EXT_texture_filter_anisotropic' );

			if ( extension ) {

				if ( texture.type === FloatType && extensions.get( 'OES_texture_float_linear' ) === null ) return;
				if ( texture.type === HalfFloatType && extensions.get( 'OES_texture_half_float_linear' ) === null ) return;

				if ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {

					_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );
					properties.get( texture ).__currentAnisotropy = texture.anisotropy;

				}

			}

		}

		function uploadTexture( textureProperties, texture, slot ) {

			if ( textureProperties.__webglInit === undefined ) {

				textureProperties.__webglInit = true;

				texture.addEventListener( 'dispose', onTextureDispose );

				textureProperties.__webglTexture = _gl.createTexture();

				infoMemory.textures ++;

			}

			state.activeTexture( _gl.TEXTURE0 + slot );
			state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );

			_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
			_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
			_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );

			var image = clampToMaxSize( texture.image, capabilities.maxTextureSize );

			if ( textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( image ) === false ) {

				image = makePowerOfTwo( image );

			}

			var isPowerOfTwoImage = isPowerOfTwo( image ),
				glFormat = utils.convert( texture.format ),
				glType = utils.convert( texture.type );

			setTextureParameters( _gl.TEXTURE_2D, texture, isPowerOfTwoImage );

			var mipmap, mipmaps = texture.mipmaps;

			if ( texture.isDepthTexture ) {

				// populate depth texture with dummy data

				var internalFormat = _gl.DEPTH_COMPONENT;

				if ( texture.type === FloatType ) {

					if ( ! _isWebGL2 ) throw new Error( 'Float Depth Texture only supported in WebGL2.0' );
					internalFormat = _gl.DEPTH_COMPONENT32F;

				} else if ( _isWebGL2 ) {

					// WebGL 2.0 requires signed internalformat for glTexImage2D
					internalFormat = _gl.DEPTH_COMPONENT16;

				}

				if ( texture.format === DepthFormat && internalFormat === _gl.DEPTH_COMPONENT ) {

					// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
					// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
					if ( texture.type !== UnsignedShortType && texture.type !== UnsignedIntType ) {

						console.warn( 'THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.' );

						texture.type = UnsignedShortType;
						glType = utils.convert( texture.type );

					}

				}

				// Depth stencil textures need the DEPTH_STENCIL internal format
				// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
				if ( texture.format === DepthStencilFormat ) {

					internalFormat = _gl.DEPTH_STENCIL;

					// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
					// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.
					// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
					if ( texture.type !== UnsignedInt248Type ) {

						console.warn( 'THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.' );

						texture.type = UnsignedInt248Type;
						glType = utils.convert( texture.type );

					}

				}

				state.texImage2D( _gl.TEXTURE_2D, 0, internalFormat, image.width, image.height, 0, glFormat, glType, null );

			} else if ( texture.isDataTexture ) {

				// use manually created mipmaps if available
				// if there are no manual mipmaps
				// set 0 level mipmap and then use GL to generate other mipmap levels

				if ( mipmaps.length > 0 && isPowerOfTwoImage ) {

					for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

						mipmap = mipmaps[ i ];
						state.texImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

					}

					texture.generateMipmaps = false;

				} else {

					state.texImage2D( _gl.TEXTURE_2D, 0, glFormat, image.width, image.height, 0, glFormat, glType, image.data );

				}

			} else if ( texture.isCompressedTexture ) {

				for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

					mipmap = mipmaps[ i ];

					if ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {

						if ( state.getCompressedTextureFormats().indexOf( glFormat ) > - 1 ) {

							state.compressedTexImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, mipmap.data );

						} else {

							console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );

						}

					} else {

						state.texImage2D( _gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );

					}

				}

			} else {

				// regular Texture (image, video, canvas)

				// use manually created mipmaps if available
				// if there are no manual mipmaps
				// set 0 level mipmap and then use GL to generate other mipmap levels

				if ( mipmaps.length > 0 && isPowerOfTwoImage ) {

					for ( var i = 0, il = mipmaps.length; i < il; i ++ ) {

						mipmap = mipmaps[ i ];
						state.texImage2D( _gl.TEXTURE_2D, i, glFormat, glFormat, glType, mipmap );

					}

					texture.generateMipmaps = false;

				} else {

					state.texImage2D( _gl.TEXTURE_2D, 0, glFormat, glFormat, glType, image );

				}

			}

			if ( textureNeedsGenerateMipmaps( texture, isPowerOfTwoImage ) ) _gl.generateMipmap( _gl.TEXTURE_2D );

			textureProperties.__version = texture.version;

			if ( texture.onUpdate ) texture.onUpdate( texture );

		}

		// Render targets

		// Setup storage for target texture and bind it to correct framebuffer
		function setupFrameBufferTexture( framebuffer, renderTarget, attachment, textureTarget ) {

			var glFormat = utils.convert( renderTarget.texture.format );
			var glType = utils.convert( renderTarget.texture.type );
			state.texImage2D( textureTarget, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
			_gl.framebufferTexture2D( _gl.FRAMEBUFFER, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );
			_gl.bindFramebuffer( _gl.FRAMEBUFFER, null );

		}

		// Setup storage for internal depth/stencil buffers and bind to correct framebuffer
		function setupRenderBufferStorage( renderbuffer, renderTarget ) {

			_gl.bindRenderbuffer( _gl.RENDERBUFFER, renderbuffer );

			if ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {

				_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_COMPONENT16, renderTarget.width, renderTarget.height );
				_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );

			} else if ( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {

				_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.DEPTH_STENCIL, renderTarget.width, renderTarget.height );
				_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );

			} else {

				// FIXME: We don't support !depth !stencil
				_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.RGBA4, renderTarget.width, renderTarget.height );

			}

			_gl.bindRenderbuffer( _gl.RENDERBUFFER, null );

		}

		// Setup resources for a Depth Texture for a FBO (needs an extension)
		function setupDepthTexture( framebuffer, renderTarget ) {

			var isCube = ( renderTarget && renderTarget.isWebGLRenderTargetCube );
			if ( isCube ) throw new Error( 'Depth Texture with cube render targets is not supported' );

			_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );

			if ( ! ( renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture ) ) {

				throw new Error( 'renderTarget.depthTexture must be an instance of THREE.DepthTexture' );

			}

			// upload an empty depth texture with framebuffer size
			if ( ! properties.get( renderTarget.depthTexture ).__webglTexture ||
					renderTarget.depthTexture.image.width !== renderTarget.width ||
					renderTarget.depthTexture.image.height !== renderTarget.height ) {

				renderTarget.depthTexture.image.width = renderTarget.width;
				renderTarget.depthTexture.image.height = renderTarget.height;
				renderTarget.depthTexture.needsUpdate = true;

			}

			setTexture2D( renderTarget.depthTexture, 0 );

			var webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture;

			if ( renderTarget.depthTexture.format === DepthFormat ) {

				_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0 );

			} else if ( renderTarget.depthTexture.format === DepthStencilFormat ) {

				_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0 );

			} else {

				throw new Error( 'Unknown depthTexture format' );

			}

		}

		// Setup GL resources for a non-texture depth buffer
		function setupDepthRenderbuffer( renderTarget ) {

			var renderTargetProperties = properties.get( renderTarget );

			var isCube = ( renderTarget.isWebGLRenderTargetCube === true );

			if ( renderTarget.depthTexture ) {

				if ( isCube ) throw new Error( 'target.depthTexture not supported in Cube render targets' );

				setupDepthTexture( renderTargetProperties.__webglFramebuffer, renderTarget );

			} else {

				if ( isCube ) {

					renderTargetProperties.__webglDepthbuffer = [];

					for ( var i = 0; i < 6; i ++ ) {

						_gl.bindFramebuffer( _gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer[ i ] );
						renderTargetProperties.__webglDepthbuffer[ i ] = _gl.createRenderbuffer();
						setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer[ i ], renderTarget );

					}

				} else {

					_gl.bindFramebuffer( _gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer );
					renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
					setupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer, renderTarget );

				}

			}

			_gl.bindFramebuffer( _gl.FRAMEBUFFER, null );

		}

		// Set up GL resources for the render target
		function setupRenderTarget( renderTarget ) {

			var renderTargetProperties = properties.get( renderTarget );
			var textureProperties = properties.get( renderTarget.texture );

			renderTarget.addEventListener( 'dispose', onRenderTargetDispose );

			textureProperties.__webglTexture = _gl.createTexture();

			infoMemory.textures ++;

			var isCube = ( renderTarget.isWebGLRenderTargetCube === true );
			var isTargetPowerOfTwo = isPowerOfTwo( renderTarget );

			// Setup framebuffer

			if ( isCube ) {

				renderTargetProperties.__webglFramebuffer = [];

				for ( var i = 0; i < 6; i ++ ) {

					renderTargetProperties.__webglFramebuffer[ i ] = _gl.createFramebuffer();

				}

			} else {

				renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();

			}

			// Setup color buffer

			if ( isCube ) {

				state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture );
				setTextureParameters( _gl.TEXTURE_CUBE_MAP, renderTarget.texture, isTargetPowerOfTwo );

				for ( var i = 0; i < 6; i ++ ) {

					setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer[ i ], renderTarget, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i );

				}

				if ( textureNeedsGenerateMipmaps( renderTarget.texture, isTargetPowerOfTwo ) ) _gl.generateMipmap( _gl.TEXTURE_CUBE_MAP );
				state.bindTexture( _gl.TEXTURE_CUBE_MAP, null );

			} else {

				state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture );
				setTextureParameters( _gl.TEXTURE_2D, renderTarget.texture, isTargetPowerOfTwo );
				setupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D );

				if ( textureNeedsGenerateMipmaps( renderTarget.texture, isTargetPowerOfTwo ) ) _gl.generateMipmap( _gl.TEXTURE_2D );
				state.bindTexture( _gl.TEXTURE_2D, null );

			}

			// Setup depth and stencil buffers

			if ( renderTarget.depthBuffer ) {

				setupDepthRenderbuffer( renderTarget );

			}

		}

		function updateRenderTargetMipmap( renderTarget ) {

			var texture = renderTarget.texture;
			var isTargetPowerOfTwo = isPowerOfTwo( renderTarget );

			if ( textureNeedsGenerateMipmaps( texture, isTargetPowerOfTwo ) ) {

				var target = renderTarget.isWebGLRenderTargetCube ? _gl.TEXTURE_CUBE_MAP : _gl.TEXTURE_2D;
				var webglTexture = properties.get( texture ).__webglTexture;

				state.bindTexture( target, webglTexture );
				_gl.generateMipmap( target );
				state.bindTexture( target, null );

			}

		}

		this.setTexture2D = setTexture2D;
		this.setTextureCube = setTextureCube;
		this.setTextureCubeDynamic = setTextureCubeDynamic;
		this.setupRenderTarget = setupRenderTarget;
		this.updateRenderTargetMipmap = updateRenderTargetMipmap;

	}

	/**
	 * @author fordacious / fordacious.github.io
	 */

	function WebGLProperties() {

		var properties = {};

		function get( object ) {

			var uuid = object.uuid;
			var map = properties[ uuid ];

			if ( map === undefined ) {

				map = {};
				properties[ uuid ] = map;

			}

			return map;

		}

		function remove( object ) {

			delete properties[ object.uuid ];

		}

		function clear() {

			properties = {};

		}

		return {
			get: get,
			remove: remove,
			clear: clear
		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLState( gl, extensions, utils ) {

		function ColorBuffer() {

			var locked = false;

			var color = new Vector4();
			var currentColorMask = null;
			var currentColorClear = new Vector4( 0, 0, 0, 0 );

			return {

				setMask: function ( colorMask ) {

					if ( currentColorMask !== colorMask && ! locked ) {

						gl.colorMask( colorMask, colorMask, colorMask, colorMask );
						currentColorMask = colorMask;

					}

				},

				setLocked: function ( lock ) {

					locked = lock;

				},

				setClear: function ( r, g, b, a, premultipliedAlpha ) {

					if ( premultipliedAlpha === true ) {

						r *= a; g *= a; b *= a;

					}

					color.set( r, g, b, a );

					if ( currentColorClear.equals( color ) === false ) {

						gl.clearColor( r, g, b, a );
						currentColorClear.copy( color );

					}

				},

				reset: function () {

					locked = false;

					currentColorMask = null;
					currentColorClear.set( - 1, 0, 0, 0 ); // set to invalid state

				}

			};

		}

		function DepthBuffer() {

			var locked = false;

			var currentDepthMask = null;
			var currentDepthFunc = null;
			var currentDepthClear = null;

			return {

				setTest: function ( depthTest ) {

					if ( depthTest ) {

						enable( gl.DEPTH_TEST );

					} else {

						disable( gl.DEPTH_TEST );

					}

				},

				setMask: function ( depthMask ) {

					if ( currentDepthMask !== depthMask && ! locked ) {

						gl.depthMask( depthMask );
						currentDepthMask = depthMask;

					}

				},

				setFunc: function ( depthFunc ) {

					if ( currentDepthFunc !== depthFunc ) {

						if ( depthFunc ) {

							switch ( depthFunc ) {

								case NeverDepth:

									gl.depthFunc( gl.NEVER );
									break;

								case AlwaysDepth:

									gl.depthFunc( gl.ALWAYS );
									break;

								case LessDepth:

									gl.depthFunc( gl.LESS );
									break;

								case LessEqualDepth:

									gl.depthFunc( gl.LEQUAL );
									break;

								case EqualDepth:

									gl.depthFunc( gl.EQUAL );
									break;

								case GreaterEqualDepth:

									gl.depthFunc( gl.GEQUAL );
									break;

								case GreaterDepth:

									gl.depthFunc( gl.GREATER );
									break;

								case NotEqualDepth:

									gl.depthFunc( gl.NOTEQUAL );
									break;

								default:

									gl.depthFunc( gl.LEQUAL );

							}

						} else {

							gl.depthFunc( gl.LEQUAL );

						}

						currentDepthFunc = depthFunc;

					}

				},

				setLocked: function ( lock ) {

					locked = lock;

				},

				setClear: function ( depth ) {

					if ( currentDepthClear !== depth ) {

						gl.clearDepth( depth );
						currentDepthClear = depth;

					}

				},

				reset: function () {

					locked = false;

					currentDepthMask = null;
					currentDepthFunc = null;
					currentDepthClear = null;

				}

			};

		}

		function StencilBuffer() {

			var locked = false;

			var currentStencilMask = null;
			var currentStencilFunc = null;
			var currentStencilRef = null;
			var currentStencilFuncMask = null;
			var currentStencilFail = null;
			var currentStencilZFail = null;
			var currentStencilZPass = null;
			var currentStencilClear = null;

			return {

				setTest: function ( stencilTest ) {

					if ( stencilTest ) {

						enable( gl.STENCIL_TEST );

					} else {

						disable( gl.STENCIL_TEST );

					}

				},

				setMask: function ( stencilMask ) {

					if ( currentStencilMask !== stencilMask && ! locked ) {

						gl.stencilMask( stencilMask );
						currentStencilMask = stencilMask;

					}

				},

				setFunc: function ( stencilFunc, stencilRef, stencilMask ) {

					if ( currentStencilFunc !== stencilFunc ||
					     currentStencilRef 	!== stencilRef 	||
					     currentStencilFuncMask !== stencilMask ) {

						gl.stencilFunc( stencilFunc, stencilRef, stencilMask );

						currentStencilFunc = stencilFunc;
						currentStencilRef = stencilRef;
						currentStencilFuncMask = stencilMask;

					}

				},

				setOp: function ( stencilFail, stencilZFail, stencilZPass ) {

					if ( currentStencilFail	 !== stencilFail 	||
					     currentStencilZFail !== stencilZFail ||
					     currentStencilZPass !== stencilZPass ) {

						gl.stencilOp( stencilFail, stencilZFail, stencilZPass );

						currentStencilFail = stencilFail;
						currentStencilZFail = stencilZFail;
						currentStencilZPass = stencilZPass;

					}

				},

				setLocked: function ( lock ) {

					locked = lock;

				},

				setClear: function ( stencil ) {

					if ( currentStencilClear !== stencil ) {

						gl.clearStencil( stencil );
						currentStencilClear = stencil;

					}

				},

				reset: function () {

					locked = false;

					currentStencilMask = null;
					currentStencilFunc = null;
					currentStencilRef = null;
					currentStencilFuncMask = null;
					currentStencilFail = null;
					currentStencilZFail = null;
					currentStencilZPass = null;
					currentStencilClear = null;

				}

			};

		}

		//

		var colorBuffer = new ColorBuffer();
		var depthBuffer = new DepthBuffer();
		var stencilBuffer = new StencilBuffer();

		var maxVertexAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
		var newAttributes = new Uint8Array( maxVertexAttributes );
		var enabledAttributes = new Uint8Array( maxVertexAttributes );
		var attributeDivisors = new Uint8Array( maxVertexAttributes );

		var capabilities = {};

		var compressedTextureFormats = null;

		var currentProgram = null;

		var currentBlending = null;
		var currentBlendEquation = null;
		var currentBlendSrc = null;
		var currentBlendDst = null;
		var currentBlendEquationAlpha = null;
		var currentBlendSrcAlpha = null;
		var currentBlendDstAlpha = null;
		var currentPremultipledAlpha = false;

		var currentFlipSided = null;
		var currentCullFace = null;

		var currentLineWidth = null;

		var currentPolygonOffsetFactor = null;
		var currentPolygonOffsetUnits = null;

		var maxTextures = gl.getParameter( gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS );

		var version = parseFloat( /^WebGL\ ([0-9])/.exec( gl.getParameter( gl.VERSION ) )[ 1 ] );
		var lineWidthAvailable = parseFloat( version ) >= 1.0;

		var currentTextureSlot = null;
		var currentBoundTextures = {};

		var currentScissor = new Vector4();
		var currentViewport = new Vector4();

		function createTexture( type, target, count ) {

			var data = new Uint8Array( 4 ); // 4 is required to match default unpack alignment of 4.
			var texture = gl.createTexture();

			gl.bindTexture( type, texture );
			gl.texParameteri( type, gl.TEXTURE_MIN_FILTER, gl.NEAREST );
			gl.texParameteri( type, gl.TEXTURE_MAG_FILTER, gl.NEAREST );

			for ( var i = 0; i < count; i ++ ) {

				gl.texImage2D( target + i, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data );

			}

			return texture;

		}

		var emptyTextures = {};
		emptyTextures[ gl.TEXTURE_2D ] = createTexture( gl.TEXTURE_2D, gl.TEXTURE_2D, 1 );
		emptyTextures[ gl.TEXTURE_CUBE_MAP ] = createTexture( gl.TEXTURE_CUBE_MAP, gl.TEXTURE_CUBE_MAP_POSITIVE_X, 6 );

		// init

		colorBuffer.setClear( 0, 0, 0, 1 );
		depthBuffer.setClear( 1 );
		stencilBuffer.setClear( 0 );

		enable( gl.DEPTH_TEST );
		depthBuffer.setFunc( LessEqualDepth );

		setFlipSided( false );
		setCullFace( CullFaceBack );
		enable( gl.CULL_FACE );

		enable( gl.BLEND );
		setBlending( NormalBlending );

		//

		function initAttributes() {

			for ( var i = 0, l = newAttributes.length; i < l; i ++ ) {

				newAttributes[ i ] = 0;

			}

		}

		function enableAttribute( attribute ) {

			newAttributes[ attribute ] = 1;

			if ( enabledAttributes[ attribute ] === 0 ) {

				gl.enableVertexAttribArray( attribute );
				enabledAttributes[ attribute ] = 1;

			}

			if ( attributeDivisors[ attribute ] !== 0 ) {

				var extension = extensions.get( 'ANGLE_instanced_arrays' );

				extension.vertexAttribDivisorANGLE( attribute, 0 );
				attributeDivisors[ attribute ] = 0;

			}

		}

		function enableAttributeAndDivisor( attribute, meshPerAttribute ) {

			newAttributes[ attribute ] = 1;

			if ( enabledAttributes[ attribute ] === 0 ) {

				gl.enableVertexAttribArray( attribute );
				enabledAttributes[ attribute ] = 1;

			}

			if ( attributeDivisors[ attribute ] !== meshPerAttribute ) {

				var extension = extensions.get( 'ANGLE_instanced_arrays' );

				extension.vertexAttribDivisorANGLE( attribute, meshPerAttribute );
				attributeDivisors[ attribute ] = meshPerAttribute;

			}

		}

		function disableUnusedAttributes() {

			for ( var i = 0, l = enabledAttributes.length; i !== l; ++ i ) {

				if ( enabledAttributes[ i ] !== newAttributes[ i ] ) {

					gl.disableVertexAttribArray( i );
					enabledAttributes[ i ] = 0;

				}

			}

		}

		function enable( id ) {

			if ( capabilities[ id ] !== true ) {

				gl.enable( id );
				capabilities[ id ] = true;

			}

		}

		function disable( id ) {

			if ( capabilities[ id ] !== false ) {

				gl.disable( id );
				capabilities[ id ] = false;

			}

		}

		function getCompressedTextureFormats() {

			if ( compressedTextureFormats === null ) {

				compressedTextureFormats = [];

				if ( extensions.get( 'WEBGL_compressed_texture_pvrtc' ) ||
				     extensions.get( 'WEBGL_compressed_texture_s3tc' ) ||
				     extensions.get( 'WEBGL_compressed_texture_etc1' ) ) {

					var formats = gl.getParameter( gl.COMPRESSED_TEXTURE_FORMATS );

					for ( var i = 0; i < formats.length; i ++ ) {

						compressedTextureFormats.push( formats[ i ] );

					}

				}

			}

			return compressedTextureFormats;

		}

		function useProgram( program ) {

			if ( currentProgram !== program ) {

				gl.useProgram( program );

				currentProgram = program;

				return true;

			}

			return false;

		}

		function setBlending( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {

			if ( blending !== NoBlending ) {

				enable( gl.BLEND );

			} else {

				disable( gl.BLEND );

			}

			if ( blending !== CustomBlending ) {

				if ( blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha ) {

					switch ( blending ) {

						case AdditiveBlending:

							if ( premultipliedAlpha ) {

								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ONE, gl.ONE, gl.ONE, gl.ONE );

							} else {

								gl.blendEquation( gl.FUNC_ADD );
								gl.blendFunc( gl.SRC_ALPHA, gl.ONE );

							}
							break;

						case SubtractiveBlending:

							if ( premultipliedAlpha ) {

								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ZERO, gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ONE_MINUS_SRC_ALPHA );

							} else {

								gl.blendEquation( gl.FUNC_ADD );
								gl.blendFunc( gl.ZERO, gl.ONE_MINUS_SRC_COLOR );

							}
							break;

						case MultiplyBlending:

							if ( premultipliedAlpha ) {

								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA );

							} else {

								gl.blendEquation( gl.FUNC_ADD );
								gl.blendFunc( gl.ZERO, gl.SRC_COLOR );

							}
							break;

						default:

							if ( premultipliedAlpha ) {

								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.ONE, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );

							} else {

								gl.blendEquationSeparate( gl.FUNC_ADD, gl.FUNC_ADD );
								gl.blendFuncSeparate( gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA );

							}

					}

				}

				currentBlendEquation = null;
				currentBlendSrc = null;
				currentBlendDst = null;
				currentBlendEquationAlpha = null;
				currentBlendSrcAlpha = null;
				currentBlendDstAlpha = null;

			} else {

				blendEquationAlpha = blendEquationAlpha || blendEquation;
				blendSrcAlpha = blendSrcAlpha || blendSrc;
				blendDstAlpha = blendDstAlpha || blendDst;

				if ( blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha ) {

					gl.blendEquationSeparate( utils.convert( blendEquation ), utils.convert( blendEquationAlpha ) );

					currentBlendEquation = blendEquation;
					currentBlendEquationAlpha = blendEquationAlpha;

				}

				if ( blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha ) {

					gl.blendFuncSeparate( utils.convert( blendSrc ), utils.convert( blendDst ), utils.convert( blendSrcAlpha ), utils.convert( blendDstAlpha ) );

					currentBlendSrc = blendSrc;
					currentBlendDst = blendDst;
					currentBlendSrcAlpha = blendSrcAlpha;
					currentBlendDstAlpha = blendDstAlpha;

				}

			}

			currentBlending = blending;
			currentPremultipledAlpha = premultipliedAlpha;

		}

		function setMaterial( material ) {

			material.side === DoubleSide
				? disable( gl.CULL_FACE )
				: enable( gl.CULL_FACE );

			setFlipSided( material.side === BackSide );

			material.transparent === true
				? setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha )
				: setBlending( NoBlending );

			depthBuffer.setFunc( material.depthFunc );
			depthBuffer.setTest( material.depthTest );
			depthBuffer.setMask( material.depthWrite );
			colorBuffer.setMask( material.colorWrite );

			setPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );

		}

		//

		function setFlipSided( flipSided ) {

			if ( currentFlipSided !== flipSided ) {

				if ( flipSided ) {

					gl.frontFace( gl.CW );

				} else {

					gl.frontFace( gl.CCW );

				}

				currentFlipSided = flipSided;

			}

		}

		function setCullFace( cullFace ) {

			if ( cullFace !== CullFaceNone ) {

				enable( gl.CULL_FACE );

				if ( cullFace !== currentCullFace ) {

					if ( cullFace === CullFaceBack ) {

						gl.cullFace( gl.BACK );

					} else if ( cullFace === CullFaceFront ) {

						gl.cullFace( gl.FRONT );

					} else {

						gl.cullFace( gl.FRONT_AND_BACK );

					}

				}

			} else {

				disable( gl.CULL_FACE );

			}

			currentCullFace = cullFace;

		}

		function setLineWidth( width ) {

			if ( width !== currentLineWidth ) {

				if ( lineWidthAvailable ) gl.lineWidth( width );

				currentLineWidth = width;

			}

		}

		function setPolygonOffset( polygonOffset, factor, units ) {

			if ( polygonOffset ) {

				enable( gl.POLYGON_OFFSET_FILL );

				if ( currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units ) {

					gl.polygonOffset( factor, units );

					currentPolygonOffsetFactor = factor;
					currentPolygonOffsetUnits = units;

				}

			} else {

				disable( gl.POLYGON_OFFSET_FILL );

			}

		}

		function setScissorTest( scissorTest ) {

			if ( scissorTest ) {

				enable( gl.SCISSOR_TEST );

			} else {

				disable( gl.SCISSOR_TEST );

			}

		}

		// texture

		function activeTexture( webglSlot ) {

			if ( webglSlot === undefined ) webglSlot = gl.TEXTURE0 + maxTextures - 1;

			if ( currentTextureSlot !== webglSlot ) {

				gl.activeTexture( webglSlot );
				currentTextureSlot = webglSlot;

			}

		}

		function bindTexture( webglType, webglTexture ) {

			if ( currentTextureSlot === null ) {

				activeTexture();

			}

			var boundTexture = currentBoundTextures[ currentTextureSlot ];

			if ( boundTexture === undefined ) {

				boundTexture = { type: undefined, texture: undefined };
				currentBoundTextures[ currentTextureSlot ] = boundTexture;

			}

			if ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {

				gl.bindTexture( webglType, webglTexture || emptyTextures[ webglType ] );

				boundTexture.type = webglType;
				boundTexture.texture = webglTexture;

			}

		}

		function compressedTexImage2D() {

			try {

				gl.compressedTexImage2D.apply( gl, arguments );

			} catch ( error ) {

				console.error( 'THREE.WebGLState:', error );

			}

		}

		function texImage2D() {

			try {

				gl.texImage2D.apply( gl, arguments );

			} catch ( error ) {

				console.error( 'THREE.WebGLState:', error );

			}

		}

		//

		function scissor( scissor ) {

			if ( currentScissor.equals( scissor ) === false ) {

				gl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );
				currentScissor.copy( scissor );

			}

		}

		function viewport( viewport ) {

			if ( currentViewport.equals( viewport ) === false ) {

				gl.viewport( viewport.x, viewport.y, viewport.z, viewport.w );
				currentViewport.copy( viewport );

			}

		}

		//

		function reset() {

			for ( var i = 0; i < enabledAttributes.length; i ++ ) {

				if ( enabledAttributes[ i ] === 1 ) {

					gl.disableVertexAttribArray( i );
					enabledAttributes[ i ] = 0;

				}

			}

			capabilities = {};

			compressedTextureFormats = null;

			currentTextureSlot = null;
			currentBoundTextures = {};

			currentProgram = null;

			currentBlending = null;

			currentFlipSided = null;
			currentCullFace = null;

			colorBuffer.reset();
			depthBuffer.reset();
			stencilBuffer.reset();

		}

		return {

			buffers: {
				color: colorBuffer,
				depth: depthBuffer,
				stencil: stencilBuffer
			},

			initAttributes: initAttributes,
			enableAttribute: enableAttribute,
			enableAttributeAndDivisor: enableAttributeAndDivisor,
			disableUnusedAttributes: disableUnusedAttributes,
			enable: enable,
			disable: disable,
			getCompressedTextureFormats: getCompressedTextureFormats,

			useProgram: useProgram,

			setBlending: setBlending,
			setMaterial: setMaterial,

			setFlipSided: setFlipSided,
			setCullFace: setCullFace,

			setLineWidth: setLineWidth,
			setPolygonOffset: setPolygonOffset,

			setScissorTest: setScissorTest,

			activeTexture: activeTexture,
			bindTexture: bindTexture,
			compressedTexImage2D: compressedTexImage2D,
			texImage2D: texImage2D,

			scissor: scissor,
			viewport: viewport,

			reset: reset

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLCapabilities( gl, extensions, parameters ) {

		var maxAnisotropy;

		function getMaxAnisotropy() {

			if ( maxAnisotropy !== undefined ) return maxAnisotropy;

			var extension = extensions.get( 'EXT_texture_filter_anisotropic' );

			if ( extension !== null ) {

				maxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );

			} else {

				maxAnisotropy = 0;

			}

			return maxAnisotropy;

		}

		function getMaxPrecision( precision ) {

			if ( precision === 'highp' ) {

				if ( gl.getShaderPrecisionFormat( gl.VERTEX_SHADER, gl.HIGH_FLOAT ).precision > 0 &&
				     gl.getShaderPrecisionFormat( gl.FRAGMENT_SHADER, gl.HIGH_FLOAT ).precision > 0 ) {

					return 'highp';

				}

				precision = 'mediump';

			}

			if ( precision === 'mediump' ) {

				if ( gl.getShaderPrecisionFormat( gl.VERTEX_SHADER, gl.MEDIUM_FLOAT ).precision > 0 &&
				     gl.getShaderPrecisionFormat( gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT ).precision > 0 ) {

					return 'mediump';

				}

			}

			return 'lowp';

		}

		var precision = parameters.precision !== undefined ? parameters.precision : 'highp';
		var maxPrecision = getMaxPrecision( precision );

		if ( maxPrecision !== precision ) {

			console.warn( 'THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.' );
			precision = maxPrecision;

		}

		var logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;

		var maxTextures = gl.getParameter( gl.MAX_TEXTURE_IMAGE_UNITS );
		var maxVertexTextures = gl.getParameter( gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS );
		var maxTextureSize = gl.getParameter( gl.MAX_TEXTURE_SIZE );
		var maxCubemapSize = gl.getParameter( gl.MAX_CUBE_MAP_TEXTURE_SIZE );

		var maxAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
		var maxVertexUniforms = gl.getParameter( gl.MAX_VERTEX_UNIFORM_VECTORS );
		var maxVaryings = gl.getParameter( gl.MAX_VARYING_VECTORS );
		var maxFragmentUniforms = gl.getParameter( gl.MAX_FRAGMENT_UNIFORM_VECTORS );

		var vertexTextures = maxVertexTextures > 0;
		var floatFragmentTextures = !! extensions.get( 'OES_texture_float' );
		var floatVertexTextures = vertexTextures && floatFragmentTextures;

		return {

			getMaxAnisotropy: getMaxAnisotropy,
			getMaxPrecision: getMaxPrecision,

			precision: precision,
			logarithmicDepthBuffer: logarithmicDepthBuffer,

			maxTextures: maxTextures,
			maxVertexTextures: maxVertexTextures,
			maxTextureSize: maxTextureSize,
			maxCubemapSize: maxCubemapSize,

			maxAttributes: maxAttributes,
			maxVertexUniforms: maxVertexUniforms,
			maxVaryings: maxVaryings,
			maxFragmentUniforms: maxFragmentUniforms,

			vertexTextures: vertexTextures,
			floatFragmentTextures: floatFragmentTextures,
			floatVertexTextures: floatVertexTextures

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebVRManager( renderer ) {

		var scope = this;

		var device = null;
		var frameData = null;

		if ( typeof window !== 'undefined' && 'VRFrameData' in window ) {

			frameData = new window.VRFrameData();

		}

		var matrixWorldInverse = new Matrix4();

		var standingMatrix = new Matrix4();
		var standingMatrixInverse = new Matrix4();

		var cameraL = new PerspectiveCamera();
		cameraL.bounds = new Vector4( 0.0, 0.0, 0.5, 1.0 );
		cameraL.layers.enable( 1 );

		var cameraR = new PerspectiveCamera();
		cameraR.bounds = new Vector4( 0.5, 0.0, 0.5, 1.0 );
		cameraR.layers.enable( 2 );

		var cameraVR = new ArrayCamera( [ cameraL, cameraR ] );
		cameraVR.layers.enable( 1 );
		cameraVR.layers.enable( 2 );

		//

		var currentSize, currentPixelRatio;

		function onVRDisplayPresentChange() {

			if ( device !== null && device.isPresenting ) {

				var eyeParameters = device.getEyeParameters( 'left' );
				var renderWidth = eyeParameters.renderWidth;
				var renderHeight = eyeParameters.renderHeight;

				currentPixelRatio = renderer.getPixelRatio();
				currentSize = renderer.getSize();

				renderer.setDrawingBufferSize( renderWidth * 2, renderHeight, 1 );

			} else if ( scope.enabled ) {

				renderer.setDrawingBufferSize( currentSize.width, currentSize.height, currentPixelRatio );

			}

		}

		if ( typeof window !== 'undefined' ) {

			window.addEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange, false );

		}

		//

		this.enabled = false;
		this.standing = false;

		this.getDevice = function () {

			return device;

		};

		this.setDevice = function ( value ) {

			if ( value !== undefined ) device = value;

		};

		this.getCamera = function ( camera ) {

			if ( device === null ) return camera;

			device.depthNear = camera.near;
			device.depthFar = camera.far;

			device.getFrameData( frameData );

			//

			var pose = frameData.pose;

			if ( pose.position !== null ) {

				camera.position.fromArray( pose.position );

			} else {

				camera.position.set( 0, 0, 0 );

			}

			if ( pose.orientation !== null ) {

				camera.quaternion.fromArray( pose.orientation );

			}

			camera.updateMatrixWorld();

			var stageParameters = device.stageParameters;

			if ( this.standing && stageParameters ) {

				standingMatrix.fromArray( stageParameters.sittingToStandingTransform );
				standingMatrixInverse.getInverse( standingMatrix );

				camera.matrixWorld.multiply( standingMatrix );
				camera.matrixWorldInverse.multiply( standingMatrixInverse );

			}

			if ( device.isPresenting === false ) return camera;

			//

			cameraL.near = camera.near;
			cameraR.near = camera.near;

			cameraL.far = camera.far;
			cameraR.far = camera.far;

			cameraVR.matrixWorld.copy( camera.matrixWorld );
			cameraVR.matrixWorldInverse.copy( camera.matrixWorldInverse );

			cameraL.matrixWorldInverse.fromArray( frameData.leftViewMatrix );
			cameraR.matrixWorldInverse.fromArray( frameData.rightViewMatrix );

			if ( this.standing && stageParameters ) {

				cameraL.matrixWorldInverse.multiply( standingMatrixInverse );
				cameraR.matrixWorldInverse.multiply( standingMatrixInverse );

			}

			var parent = camera.parent;

			if ( parent !== null ) {

				matrixWorldInverse.getInverse( parent.matrixWorld );

				cameraL.matrixWorldInverse.multiply( matrixWorldInverse );
				cameraR.matrixWorldInverse.multiply( matrixWorldInverse );

			}

			// envMap and Mirror needs camera.matrixWorld

			cameraL.matrixWorld.getInverse( cameraL.matrixWorldInverse );
			cameraR.matrixWorld.getInverse( cameraR.matrixWorldInverse );

			cameraL.projectionMatrix.fromArray( frameData.leftProjectionMatrix );
			cameraR.projectionMatrix.fromArray( frameData.rightProjectionMatrix );

			// HACK @mrdoob
			// https://github.com/w3c/webvr/issues/203

			cameraVR.projectionMatrix.copy( cameraL.projectionMatrix );

			//

			var layers = device.getLayers();

			if ( layers.length ) {

				var layer = layers[ 0 ];

				if ( layer.leftBounds !== null && layer.leftBounds.length === 4 ) {

					cameraL.bounds.fromArray( layer.leftBounds );

				}

				if ( layer.rightBounds !== null && layer.rightBounds.length === 4 ) {

					cameraR.bounds.fromArray( layer.rightBounds );

				}

			}

			return cameraVR;

		};

		this.getStandingMatrix = function () {

			return standingMatrix;

		};

		this.submitFrame = function () {

			if ( device && device.isPresenting ) device.submitFrame();

		};

		this.dispose = function () {

			window.removeEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange );

		};

	}

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function WebGLExtensions( gl ) {

		var extensions = {};

		return {

			get: function ( name ) {

				if ( extensions[ name ] !== undefined ) {

					return extensions[ name ];

				}

				var extension;

				switch ( name ) {

					case 'WEBGL_depth_texture':
						extension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );
						break;

					case 'EXT_texture_filter_anisotropic':
						extension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );
						break;

					case 'WEBGL_compressed_texture_s3tc':
						extension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );
						break;

					case 'WEBGL_compressed_texture_pvrtc':
						extension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );
						break;

					case 'WEBGL_compressed_texture_etc1':
						extension = gl.getExtension( 'WEBGL_compressed_texture_etc1' );
						break;

					default:
						extension = gl.getExtension( name );

				}

				if ( extension === null ) {

					console.warn( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );

				}

				extensions[ name ] = extension;

				return extension;

			}

		};

	}

	/**
	 * @author tschw
	 */

	function WebGLClipping() {

		var scope = this,

			globalState = null,
			numGlobalPlanes = 0,
			localClippingEnabled = false,
			renderingShadows = false,

			plane = new Plane(),
			viewNormalMatrix = new Matrix3(),

			uniform = { value: null, needsUpdate: false };

		this.uniform = uniform;
		this.numPlanes = 0;
		this.numIntersection = 0;

		this.init = function ( planes, enableLocalClipping, camera ) {

			var enabled =
				planes.length !== 0 ||
				enableLocalClipping ||
				// enable state of previous frame - the clipping code has to
				// run another frame in order to reset the state:
				numGlobalPlanes !== 0 ||
				localClippingEnabled;

			localClippingEnabled = enableLocalClipping;

			globalState = projectPlanes( planes, camera, 0 );
			numGlobalPlanes = planes.length;

			return enabled;

		};

		this.beginShadows = function () {

			renderingShadows = true;
			projectPlanes( null );

		};

		this.endShadows = function () {

			renderingShadows = false;
			resetGlobalState();

		};

		this.setState = function ( planes, clipIntersection, clipShadows, camera, cache, fromCache ) {

			if ( ! localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && ! clipShadows ) {

				// there's no local clipping

				if ( renderingShadows ) {

					// there's no global clipping

					projectPlanes( null );

				} else {

					resetGlobalState();

				}

			} else {

				var nGlobal = renderingShadows ? 0 : numGlobalPlanes,
					lGlobal = nGlobal * 4,

					dstArray = cache.clippingState || null;

				uniform.value = dstArray; // ensure unique state

				dstArray = projectPlanes( planes, camera, lGlobal, fromCache );

				for ( var i = 0; i !== lGlobal; ++ i ) {

					dstArray[ i ] = globalState[ i ];

				}

				cache.clippingState = dstArray;
				this.numIntersection = clipIntersection ? this.numPlanes : 0;
				this.numPlanes += nGlobal;

			}


		};

		function resetGlobalState() {

			if ( uniform.value !== globalState ) {

				uniform.value = globalState;
				uniform.needsUpdate = numGlobalPlanes > 0;

			}

			scope.numPlanes = numGlobalPlanes;
			scope.numIntersection = 0;

		}

		function projectPlanes( planes, camera, dstOffset, skipTransform ) {

			var nPlanes = planes !== null ? planes.length : 0,
				dstArray = null;

			if ( nPlanes !== 0 ) {

				dstArray = uniform.value;

				if ( skipTransform !== true || dstArray === null ) {

					var flatSize = dstOffset + nPlanes * 4,
						viewMatrix = camera.matrixWorldInverse;

					viewNormalMatrix.getNormalMatrix( viewMatrix );

					if ( dstArray === null || dstArray.length < flatSize ) {

						dstArray = new Float32Array( flatSize );

					}

					for ( var i = 0, i4 = dstOffset; i !== nPlanes; ++ i, i4 += 4 ) {

						plane.copy( planes[ i ] ).applyMatrix4( viewMatrix, viewNormalMatrix );

						plane.normal.toArray( dstArray, i4 );
						dstArray[ i4 + 3 ] = plane.constant;

					}

				}

				uniform.value = dstArray;
				uniform.needsUpdate = true;

			}

			scope.numPlanes = nPlanes;

			return dstArray;

		}

	}

	/**
	 * @author thespite / http://www.twitter.com/thespite
	 */

	function WebGLUtils( gl, extensions ) {

		function convert( p ) {

			var extension;

			if ( p === RepeatWrapping ) return gl.REPEAT;
			if ( p === ClampToEdgeWrapping ) return gl.CLAMP_TO_EDGE;
			if ( p === MirroredRepeatWrapping ) return gl.MIRRORED_REPEAT;

			if ( p === NearestFilter ) return gl.NEAREST;
			if ( p === NearestMipMapNearestFilter ) return gl.NEAREST_MIPMAP_NEAREST;
			if ( p === NearestMipMapLinearFilter ) return gl.NEAREST_MIPMAP_LINEAR;

			if ( p === LinearFilter ) return gl.LINEAR;
			if ( p === LinearMipMapNearestFilter ) return gl.LINEAR_MIPMAP_NEAREST;
			if ( p === LinearMipMapLinearFilter ) return gl.LINEAR_MIPMAP_LINEAR;

			if ( p === UnsignedByteType ) return gl.UNSIGNED_BYTE;
			if ( p === UnsignedShort4444Type ) return gl.UNSIGNED_SHORT_4_4_4_4;
			if ( p === UnsignedShort5551Type ) return gl.UNSIGNED_SHORT_5_5_5_1;
			if ( p === UnsignedShort565Type ) return gl.UNSIGNED_SHORT_5_6_5;

			if ( p === ByteType ) return gl.BYTE;
			if ( p === ShortType ) return gl.SHORT;
			if ( p === UnsignedShortType ) return gl.UNSIGNED_SHORT;
			if ( p === IntType ) return gl.INT;
			if ( p === UnsignedIntType ) return gl.UNSIGNED_INT;
			if ( p === FloatType ) return gl.FLOAT;

			if ( p === HalfFloatType ) {

				extension = extensions.get( 'OES_texture_half_float' );

				if ( extension !== null ) return extension.HALF_FLOAT_OES;

			}

			if ( p === AlphaFormat ) return gl.ALPHA;
			if ( p === RGBFormat ) return gl.RGB;
			if ( p === RGBAFormat ) return gl.RGBA;
			if ( p === LuminanceFormat ) return gl.LUMINANCE;
			if ( p === LuminanceAlphaFormat ) return gl.LUMINANCE_ALPHA;
			if ( p === DepthFormat ) return gl.DEPTH_COMPONENT;
			if ( p === DepthStencilFormat ) return gl.DEPTH_STENCIL;

			if ( p === AddEquation ) return gl.FUNC_ADD;
			if ( p === SubtractEquation ) return gl.FUNC_SUBTRACT;
			if ( p === ReverseSubtractEquation ) return gl.FUNC_REVERSE_SUBTRACT;

			if ( p === ZeroFactor ) return gl.ZERO;
			if ( p === OneFactor ) return gl.ONE;
			if ( p === SrcColorFactor ) return gl.SRC_COLOR;
			if ( p === OneMinusSrcColorFactor ) return gl.ONE_MINUS_SRC_COLOR;
			if ( p === SrcAlphaFactor ) return gl.SRC_ALPHA;
			if ( p === OneMinusSrcAlphaFactor ) return gl.ONE_MINUS_SRC_ALPHA;
			if ( p === DstAlphaFactor ) return gl.DST_ALPHA;
			if ( p === OneMinusDstAlphaFactor ) return gl.ONE_MINUS_DST_ALPHA;

			if ( p === DstColorFactor ) return gl.DST_COLOR;
			if ( p === OneMinusDstColorFactor ) return gl.ONE_MINUS_DST_COLOR;
			if ( p === SrcAlphaSaturateFactor ) return gl.SRC_ALPHA_SATURATE;

			if ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format ||
				p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {

				extension = extensions.get( 'WEBGL_compressed_texture_s3tc' );

				if ( extension !== null ) {

					if ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
					if ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
					if ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
					if ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;

				}

			}

			if ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format ||
				p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {

				extension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );

				if ( extension !== null ) {

					if ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
					if ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
					if ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
					if ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;

				}

			}

			if ( p === RGB_ETC1_Format ) {

				extension = extensions.get( 'WEBGL_compressed_texture_etc1' );

				if ( extension !== null ) return extension.COMPRESSED_RGB_ETC1_WEBGL;

			}

			if ( p === MinEquation || p === MaxEquation ) {

				extension = extensions.get( 'EXT_blend_minmax' );

				if ( extension !== null ) {

					if ( p === MinEquation ) return extension.MIN_EXT;
					if ( p === MaxEquation ) return extension.MAX_EXT;

				}

			}

			if ( p === UnsignedInt248Type ) {

				extension = extensions.get( 'WEBGL_depth_texture' );

				if ( extension !== null ) return extension.UNSIGNED_INT_24_8_WEBGL;

			}

			return 0;

		}

		return { convert: convert };

	}

	/**
	 * @author supereggbert / http://www.paulbrunt.co.uk/
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 * @author szimek / https://github.com/szimek/
	 * @author tschw
	 */

	function WebGLRenderer( parameters ) {

		console.log( 'THREE.WebGLRenderer', REVISION );

		parameters = parameters || {};

		var _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' ),
			_context = parameters.context !== undefined ? parameters.context : null,

			_alpha = parameters.alpha !== undefined ? parameters.alpha : false,
			_depth = parameters.depth !== undefined ? parameters.depth : true,
			_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
			_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
			_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
			_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false;

		var lightsArray = [];
		var shadowsArray = [];

		var currentRenderList = null;

		var spritesArray = [];
		var flaresArray = [];

		// public properties

		this.domElement = _canvas;
		this.context = null;

		// clearing

		this.autoClear = true;
		this.autoClearColor = true;
		this.autoClearDepth = true;
		this.autoClearStencil = true;

		// scene graph

		this.sortObjects = true;

		// user-defined clipping

		this.clippingPlanes = [];
		this.localClippingEnabled = false;

		// physically based shading

		this.gammaFactor = 2.0;	// for backwards compatibility
		this.gammaInput = false;
		this.gammaOutput = false;

		// physical lights

		this.physicallyCorrectLights = false;

		// tone mapping

		this.toneMapping = LinearToneMapping;
		this.toneMappingExposure = 1.0;
		this.toneMappingWhitePoint = 1.0;

		// morphs

		this.maxMorphTargets = 8;
		this.maxMorphNormals = 4;

		// internal properties

		var _this = this,

			_isContextLost = false,

			// internal state cache

			_currentRenderTarget = null,
			_currentFramebuffer = null,
			_currentMaterialId = - 1,
			_currentGeometryProgram = '',

			_currentCamera = null,
			_currentArrayCamera = null,

			_currentViewport = new Vector4(),
			_currentScissor = new Vector4(),
			_currentScissorTest = null,

			//

			_usedTextureUnits = 0,

			//

			_width = _canvas.width,
			_height = _canvas.height,

			_pixelRatio = 1,

			_viewport = new Vector4( 0, 0, _width, _height ),
			_scissor = new Vector4( 0, 0, _width, _height ),
			_scissorTest = false,

			// frustum

			_frustum = new Frustum(),

			// clipping

			_clipping = new WebGLClipping(),
			_clippingEnabled = false,
			_localClippingEnabled = false,

			// camera matrices cache

			_projScreenMatrix = new Matrix4(),

			_vector3 = new Vector3(),

			// info

			_infoMemory = {
				geometries: 0,
				textures: 0
			},

			_infoRender = {

				frame: 0,
				calls: 0,
				vertices: 0,
				faces: 0,
				points: 0

			};

		this.info = {

			render: _infoRender,
			memory: _infoMemory,
			programs: null

		};

		function getTargetPixelRatio() {

			return _currentRenderTarget === null ? _pixelRatio : 1;

		}

		// initialize

		var _gl;

		try {

			var contextAttributes = {
				alpha: _alpha,
				depth: _depth,
				stencil: _stencil,
				antialias: _antialias,
				premultipliedAlpha: _premultipliedAlpha,
				preserveDrawingBuffer: _preserveDrawingBuffer
			};

			_gl = _context || _canvas.getContext( 'webgl', contextAttributes ) || _canvas.getContext( 'experimental-webgl', contextAttributes );

			if ( _gl === null ) {

				if ( _canvas.getContext( 'webgl' ) !== null ) {

					throw 'Error creating WebGL context with your selected attributes.';

				} else {

					throw 'Error creating WebGL context.';

				}

			}

			// Some experimental-webgl implementations do not have getShaderPrecisionFormat

			if ( _gl.getShaderPrecisionFormat === undefined ) {

				_gl.getShaderPrecisionFormat = function () {

					return { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };

				};

			}

			_canvas.addEventListener( 'webglcontextlost', onContextLost, false );
			_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );

		} catch ( error ) {

			console.error( 'THREE.WebGLRenderer: ' + error );

		}

		var extensions, capabilities, state;
		var properties, textures, attributes, geometries, objects, lights;
		var programCache, renderLists;

		var background, morphtargets, bufferRenderer, indexedBufferRenderer;
		var flareRenderer, spriteRenderer;

		var utils;

		function initGLContext() {

			extensions = new WebGLExtensions( _gl );
			extensions.get( 'WEBGL_depth_texture' );
			extensions.get( 'OES_texture_float' );
			extensions.get( 'OES_texture_float_linear' );
			extensions.get( 'OES_texture_half_float' );
			extensions.get( 'OES_texture_half_float_linear' );
			extensions.get( 'OES_standard_derivatives' );
			extensions.get( 'OES_element_index_uint' );
			extensions.get( 'ANGLE_instanced_arrays' );

			utils = new WebGLUtils( _gl, extensions );

			capabilities = new WebGLCapabilities( _gl, extensions, parameters );

			state = new WebGLState( _gl, extensions, utils );
			state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );
			state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );

			properties = new WebGLProperties();
			textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, _infoMemory );
			attributes = new WebGLAttributes( _gl );
			geometries = new WebGLGeometries( _gl, attributes, _infoMemory );
			objects = new WebGLObjects( geometries, _infoRender );
			morphtargets = new WebGLMorphtargets( _gl );
			programCache = new WebGLPrograms( _this, extensions, capabilities );
			lights = new WebGLLights();
			renderLists = new WebGLRenderLists();

			background = new WebGLBackground( _this, state, geometries, _premultipliedAlpha );

			bufferRenderer = new WebGLBufferRenderer( _gl, extensions, _infoRender );
			indexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, _infoRender );

			flareRenderer = new WebGLFlareRenderer( _this, _gl, state, textures, capabilities );
			spriteRenderer = new WebGLSpriteRenderer( _this, _gl, state, textures, capabilities );

			_this.info.programs = programCache.programs;

			_this.context = _gl;
			_this.capabilities = capabilities;
			_this.extensions = extensions;
			_this.properties = properties;
			_this.renderLists = renderLists;
			_this.state = state;

		}

		initGLContext();

		// vr

		var vr = new WebVRManager( _this );

		this.vr = vr;

		// shadow map

		var shadowMap = new WebGLShadowMap( _this, objects, capabilities.maxTextureSize );

		this.shadowMap = shadowMap;

		// API

		this.getContext = function () {

			return _gl;

		};

		this.getContextAttributes = function () {

			return _gl.getContextAttributes();

		};

		this.forceContextLoss = function () {

			var extension = extensions.get( 'WEBGL_lose_context' );
			if ( extension ) extension.loseContext();

		};

		this.forceContextRestore = function () {

			var extension = extensions.get( 'WEBGL_lose_context' );
			if ( extension ) extension.restoreContext();

		};

		this.getPixelRatio = function () {

			return _pixelRatio;

		};

		this.setPixelRatio = function ( value ) {

			if ( value === undefined ) return;

			_pixelRatio = value;

			this.setSize( _width, _height, false );

		};

		this.getSize = function () {

			return {
				width: _width,
				height: _height
			};

		};

		this.setSize = function ( width, height, updateStyle ) {

			var device = vr.getDevice();

			if ( device && device.isPresenting ) {

				console.warn( 'THREE.WebGLRenderer: Can\'t change size while VR device is presenting.' );
				return;

			}

			_width = width;
			_height = height;

			_canvas.width = width * _pixelRatio;
			_canvas.height = height * _pixelRatio;

			if ( updateStyle !== false ) {

				_canvas.style.width = width + 'px';
				_canvas.style.height = height + 'px';

			}

			this.setViewport( 0, 0, width, height );

		};

		this.getDrawingBufferSize = function () {

			return {
				width: _width * _pixelRatio,
				height: _height * _pixelRatio
			};

		};

		this.setDrawingBufferSize = function ( width, height, pixelRatio ) {

			_width = width;
			_height = height;

			_pixelRatio = pixelRatio;

			_canvas.width = width * pixelRatio;
			_canvas.height = height * pixelRatio;

			this.setViewport( 0, 0, width, height );

		};

		this.setViewport = function ( x, y, width, height ) {

			_viewport.set( x, _height - y - height, width, height );
			state.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ) );

		};

		this.setScissor = function ( x, y, width, height ) {

			_scissor.set( x, _height - y - height, width, height );
			state.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ) );

		};

		this.setScissorTest = function ( boolean ) {

			state.setScissorTest( _scissorTest = boolean );

		};

		// Clearing

		this.getClearColor = function () {

			return background.getClearColor();

		};

		this.setClearColor = function () {

			background.setClearColor.apply( background, arguments );

		};

		this.getClearAlpha = function () {

			return background.getClearAlpha();

		};

		this.setClearAlpha = function () {

			background.setClearAlpha.apply( background, arguments );

		};

		this.clear = function ( color, depth, stencil ) {

			var bits = 0;

			if ( color === undefined || color ) bits |= _gl.COLOR_BUFFER_BIT;
			if ( depth === undefined || depth ) bits |= _gl.DEPTH_BUFFER_BIT;
			if ( stencil === undefined || stencil ) bits |= _gl.STENCIL_BUFFER_BIT;

			_gl.clear( bits );

		};

		this.clearColor = function () {

			this.clear( true, false, false );

		};

		this.clearDepth = function () {

			this.clear( false, true, false );

		};

		this.clearStencil = function () {

			this.clear( false, false, true );

		};

		this.clearTarget = function ( renderTarget, color, depth, stencil ) {

			this.setRenderTarget( renderTarget );
			this.clear( color, depth, stencil );

		};

		//

		this.dispose = function () {

			_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );
			_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );

			renderLists.dispose();

			vr.dispose();

		};

		// Events

		function onContextLost( event ) {

			event.preventDefault();

			console.log( 'THREE.WebGLRenderer: Context Lost.' );

			_isContextLost = true;

		}

		function onContextRestore( /* event */ ) {

			console.log( 'THREE.WebGLRenderer: Context Restored.' );

			_isContextLost = false;

			initGLContext();

		}

		function onMaterialDispose( event ) {

			var material = event.target;

			material.removeEventListener( 'dispose', onMaterialDispose );

			deallocateMaterial( material );

		}

		// Buffer deallocation

		function deallocateMaterial( material ) {

			releaseMaterialProgramReference( material );

			properties.remove( material );

		}


		function releaseMaterialProgramReference( material ) {

			var programInfo = properties.get( material ).program;

			material.program = undefined;

			if ( programInfo !== undefined ) {

				programCache.releaseProgram( programInfo );

			}

		}

		// Buffer rendering

		function renderObjectImmediate( object, program, material ) {

			object.render( function ( object ) {

				_this.renderBufferImmediate( object, program, material );

			} );

		}

		this.renderBufferImmediate = function ( object, program, material ) {

			state.initAttributes();

			var buffers = properties.get( object );

			if ( object.hasPositions && ! buffers.position ) buffers.position = _gl.createBuffer();
			if ( object.hasNormals && ! buffers.normal ) buffers.normal = _gl.createBuffer();
			if ( object.hasUvs && ! buffers.uv ) buffers.uv = _gl.createBuffer();
			if ( object.hasColors && ! buffers.color ) buffers.color = _gl.createBuffer();

			var programAttributes = program.getAttributes();

			if ( object.hasPositions ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.position );
				_gl.bufferData( _gl.ARRAY_BUFFER, object.positionArray, _gl.DYNAMIC_DRAW );

				state.enableAttribute( programAttributes.position );
				_gl.vertexAttribPointer( programAttributes.position, 3, _gl.FLOAT, false, 0, 0 );

			}

			if ( object.hasNormals ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.normal );

				if ( ! material.isMeshPhongMaterial &&
					! material.isMeshStandardMaterial &&
					! material.isMeshNormalMaterial &&
					material.flatShading === true ) {

					for ( var i = 0, l = object.count * 3; i < l; i += 9 ) {

						var array = object.normalArray;

						var nx = ( array[ i + 0 ] + array[ i + 3 ] + array[ i + 6 ] ) / 3;
						var ny = ( array[ i + 1 ] + array[ i + 4 ] + array[ i + 7 ] ) / 3;
						var nz = ( array[ i + 2 ] + array[ i + 5 ] + array[ i + 8 ] ) / 3;

						array[ i + 0 ] = nx;
						array[ i + 1 ] = ny;
						array[ i + 2 ] = nz;

						array[ i + 3 ] = nx;
						array[ i + 4 ] = ny;
						array[ i + 5 ] = nz;

						array[ i + 6 ] = nx;
						array[ i + 7 ] = ny;
						array[ i + 8 ] = nz;

					}

				}

				_gl.bufferData( _gl.ARRAY_BUFFER, object.normalArray, _gl.DYNAMIC_DRAW );

				state.enableAttribute( programAttributes.normal );

				_gl.vertexAttribPointer( programAttributes.normal, 3, _gl.FLOAT, false, 0, 0 );

			}

			if ( object.hasUvs && material.map ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.uv );
				_gl.bufferData( _gl.ARRAY_BUFFER, object.uvArray, _gl.DYNAMIC_DRAW );

				state.enableAttribute( programAttributes.uv );

				_gl.vertexAttribPointer( programAttributes.uv, 2, _gl.FLOAT, false, 0, 0 );

			}

			if ( object.hasColors && material.vertexColors !== NoColors ) {

				_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.color );
				_gl.bufferData( _gl.ARRAY_BUFFER, object.colorArray, _gl.DYNAMIC_DRAW );

				state.enableAttribute( programAttributes.color );

				_gl.vertexAttribPointer( programAttributes.color, 3, _gl.FLOAT, false, 0, 0 );

			}

			state.disableUnusedAttributes();

			_gl.drawArrays( _gl.TRIANGLES, 0, object.count );

			object.count = 0;

		};

		this.renderBufferDirect = function ( camera, fog, geometry, material, object, group ) {

			state.setMaterial( material );

			var program = setProgram( camera, fog, material, object );
			var geometryProgram = geometry.id + '_' + program.id + '_' + ( material.wireframe === true );

			var updateBuffers = false;

			if ( geometryProgram !== _currentGeometryProgram ) {

				_currentGeometryProgram = geometryProgram;
				updateBuffers = true;

			}

			if ( object.morphTargetInfluences ) {

				morphtargets.update( object, geometry, material, program );

				updateBuffers = true;

			}

			//

			var index = geometry.index;
			var position = geometry.attributes.position;
			var rangeFactor = 1;

			if ( material.wireframe === true ) {

				index = geometries.getWireframeAttribute( geometry );
				rangeFactor = 2;

			}

			var attribute;
			var renderer = bufferRenderer;

			if ( index !== null ) {

				attribute = attributes.get( index );

				renderer = indexedBufferRenderer;
				renderer.setIndex( attribute );

			}

			if ( updateBuffers ) {

				setupVertexAttributes( material, program, geometry );

				if ( index !== null ) {

					_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, attribute.buffer );

				}

			}

			//

			var dataCount = 0;

			if ( index !== null ) {

				dataCount = index.count;

			} else if ( position !== undefined ) {

				dataCount = position.count;

			}

			var rangeStart = geometry.drawRange.start * rangeFactor;
			var rangeCount = geometry.drawRange.count * rangeFactor;

			var groupStart = group !== null ? group.start * rangeFactor : 0;
			var groupCount = group !== null ? group.count * rangeFactor : Infinity;

			var drawStart = Math.max( rangeStart, groupStart );
			var drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;

			var drawCount = Math.max( 0, drawEnd - drawStart + 1 );

			if ( drawCount === 0 ) return;

			//

			if ( object.isMesh ) {

				if ( material.wireframe === true ) {

					state.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );
					renderer.setMode( _gl.LINES );

				} else {

					switch ( object.drawMode ) {

						case TrianglesDrawMode:
							renderer.setMode( _gl.TRIANGLES );
							break;

						case TriangleStripDrawMode:
							renderer.setMode( _gl.TRIANGLE_STRIP );
							break;

						case TriangleFanDrawMode:
							renderer.setMode( _gl.TRIANGLE_FAN );
							break;

					}

				}


			} else if ( object.isLine ) {

				var lineWidth = material.linewidth;

				if ( lineWidth === undefined ) lineWidth = 1; // Not using Line*Material

				state.setLineWidth( lineWidth * getTargetPixelRatio() );

				if ( object.isLineSegments ) {

					renderer.setMode( _gl.LINES );

				} else if ( object.isLineLoop ) {

					renderer.setMode( _gl.LINE_LOOP );

				} else {

					renderer.setMode( _gl.LINE_STRIP );

				}

			} else if ( object.isPoints ) {

				renderer.setMode( _gl.POINTS );

			}

			if ( geometry && geometry.isInstancedBufferGeometry ) {

				if ( geometry.maxInstancedCount > 0 ) {

					renderer.renderInstances( geometry, drawStart, drawCount );

				}

			} else {

				renderer.render( drawStart, drawCount );

			}

		};

		function setupVertexAttributes( material, program, geometry, startIndex ) {

			if ( geometry && geometry.isInstancedBufferGeometry ) {

				if ( extensions.get( 'ANGLE_instanced_arrays' ) === null ) {

					console.error( 'THREE.WebGLRenderer.setupVertexAttributes: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );
					return;

				}

			}

			if ( startIndex === undefined ) startIndex = 0;

			state.initAttributes();

			var geometryAttributes = geometry.attributes;

			var programAttributes = program.getAttributes();

			var materialDefaultAttributeValues = material.defaultAttributeValues;

			for ( var name in programAttributes ) {

				var programAttribute = programAttributes[ name ];

				if ( programAttribute >= 0 ) {

					var geometryAttribute = geometryAttributes[ name ];

					if ( geometryAttribute !== undefined ) {

						var normalized = geometryAttribute.normalized;
						var size = geometryAttribute.itemSize;

						var attribute = attributes.get( geometryAttribute );

						// TODO Attribute may not be available on context restore

						if ( attribute === undefined ) continue;

						var buffer = attribute.buffer;
						var type = attribute.type;
						var bytesPerElement = attribute.bytesPerElement;

						if ( geometryAttribute.isInterleavedBufferAttribute ) {

							var data = geometryAttribute.data;
							var stride = data.stride;
							var offset = geometryAttribute.offset;

							if ( data && data.isInstancedInterleavedBuffer ) {

								state.enableAttributeAndDivisor( programAttribute, data.meshPerAttribute );

								if ( geometry.maxInstancedCount === undefined ) {

									geometry.maxInstancedCount = data.meshPerAttribute * data.count;

								}

							} else {

								state.enableAttribute( programAttribute );

							}

							_gl.bindBuffer( _gl.ARRAY_BUFFER, buffer );
							_gl.vertexAttribPointer( programAttribute, size, type, normalized, stride * bytesPerElement, ( startIndex * stride + offset ) * bytesPerElement );

						} else {

							if ( geometryAttribute.isInstancedBufferAttribute ) {

								state.enableAttributeAndDivisor( programAttribute, geometryAttribute.meshPerAttribute );

								if ( geometry.maxInstancedCount === undefined ) {

									geometry.maxInstancedCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;

								}

							} else {

								state.enableAttribute( programAttribute );

							}

							_gl.bindBuffer( _gl.ARRAY_BUFFER, buffer );
							_gl.vertexAttribPointer( programAttribute, size, type, normalized, 0, startIndex * size * bytesPerElement );

						}

					} else if ( materialDefaultAttributeValues !== undefined ) {

						var value = materialDefaultAttributeValues[ name ];

						if ( value !== undefined ) {

							switch ( value.length ) {

								case 2:
									_gl.vertexAttrib2fv( programAttribute, value );
									break;

								case 3:
									_gl.vertexAttrib3fv( programAttribute, value );
									break;

								case 4:
									_gl.vertexAttrib4fv( programAttribute, value );
									break;

								default:
									_gl.vertexAttrib1fv( programAttribute, value );

							}

						}

					}

				}

			}

			state.disableUnusedAttributes();

		}

		// Compile

		this.compile = function ( scene, camera ) {

			lightsArray.length = 0;
			shadowsArray.length = 0;

			scene.traverse( function ( object ) {

				if ( object.isLight ) {

					lightsArray.push( object );

					if ( object.castShadow ) {

						shadowsArray.push( object );

					}

				}

			} );

			lights.setup( lightsArray, shadowsArray, camera );

			scene.traverse( function ( object ) {

				if ( object.material ) {

					if ( Array.isArray( object.material ) ) {

						for ( var i = 0; i < object.material.length; i ++ ) {

							initMaterial( object.material[ i ], scene.fog, object );

						}

					} else {

						initMaterial( object.material, scene.fog, object );

					}

				}

			} );

		};

		// Animation Loop

		var isAnimating = false;
		var onAnimationFrame = null;

		function start() {

			if ( isAnimating ) return;

			var device = vr.getDevice();
			
			if ( device && device.isPresenting ) {

				device.requestAnimationFrame( loop );

			} else {

				window.requestAnimationFrame( loop );

			}

			isAnimating = true;

		}

		function loop( time ) {

			if ( onAnimationFrame !== null ) onAnimationFrame( time );

			var device = vr.getDevice();
			
			if ( device && device.isPresenting ) {

				device.requestAnimationFrame( loop );

			} else {

				window.requestAnimationFrame( loop );

			}

		}

		this.animate = function ( callback ) {

			onAnimationFrame = callback;
			start();

		};

		// Rendering

		this.render = function ( scene, camera, renderTarget, forceClear ) {

			if ( ! ( camera && camera.isCamera ) ) {

				console.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );
				return;

			}

			if ( _isContextLost ) return;

			// reset caching for this frame

			_currentGeometryProgram = '';
			_currentMaterialId = - 1;
			_currentCamera = null;

			// update scene graph

			if ( scene.autoUpdate === true ) scene.updateMatrixWorld();

			// update camera matrices and frustum

			if ( camera.parent === null ) camera.updateMatrixWorld();

			if ( vr.enabled ) {

				camera = vr.getCamera( camera );

			}

			_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
			_frustum.setFromMatrix( _projScreenMatrix );

			lightsArray.length = 0;
			shadowsArray.length = 0;

			spritesArray.length = 0;
			flaresArray.length = 0;

			_localClippingEnabled = this.localClippingEnabled;
			_clippingEnabled = _clipping.init( this.clippingPlanes, _localClippingEnabled, camera );

			currentRenderList = renderLists.get( scene, camera );
			currentRenderList.init();

			projectObject( scene, camera, _this.sortObjects );

			if ( _this.sortObjects === true ) {

				currentRenderList.sort();

			}

			//

			if ( _clippingEnabled ) _clipping.beginShadows();

			shadowMap.render( shadowsArray, scene, camera );

			lights.setup( lightsArray, shadowsArray, camera );

			if ( _clippingEnabled ) _clipping.endShadows();

			//

			_infoRender.frame ++;
			_infoRender.calls = 0;
			_infoRender.vertices = 0;
			_infoRender.faces = 0;
			_infoRender.points = 0;

			if ( renderTarget === undefined ) {

				renderTarget = null;

			}

			this.setRenderTarget( renderTarget );

			//

			background.render( currentRenderList, scene, camera, forceClear );

			// render scene

			var opaqueObjects = currentRenderList.opaque;
			var transparentObjects = currentRenderList.transparent;

			if ( scene.overrideMaterial ) {

				var overrideMaterial = scene.overrideMaterial;

				if ( opaqueObjects.length ) renderObjects( opaqueObjects, scene, camera, overrideMaterial );
				if ( transparentObjects.length ) renderObjects( transparentObjects, scene, camera, overrideMaterial );

			} else {

				// opaque pass (front-to-back order)

				if ( opaqueObjects.length ) renderObjects( opaqueObjects, scene, camera );

				// transparent pass (back-to-front order)

				if ( transparentObjects.length ) renderObjects( transparentObjects, scene, camera );

			}

			// custom renderers

			spriteRenderer.render( spritesArray, scene, camera );
			flareRenderer.render( flaresArray, scene, camera, _currentViewport );

			// Generate mipmap if we're using any kind of mipmap filtering

			if ( renderTarget ) {

				textures.updateRenderTargetMipmap( renderTarget );

			}

			// Ensure depth buffer writing is enabled so it can be cleared on next render

			state.buffers.depth.setTest( true );
			state.buffers.depth.setMask( true );
			state.buffers.color.setMask( true );

			state.setPolygonOffset( false );

			if ( vr.enabled ) {

				vr.submitFrame();

			}

			// _gl.finish();

		};

		/*
		// TODO Duplicated code (Frustum)

		var _sphere = new Sphere();

		function isObjectViewable( object ) {

			var geometry = object.geometry;

			if ( geometry.boundingSphere === null )
				geometry.computeBoundingSphere();

			_sphere.copy( geometry.boundingSphere ).
			applyMatrix4( object.matrixWorld );

			return isSphereViewable( _sphere );

		}

		function isSpriteViewable( sprite ) {

			_sphere.center.set( 0, 0, 0 );
			_sphere.radius = 0.7071067811865476;
			_sphere.applyMatrix4( sprite.matrixWorld );

			return isSphereViewable( _sphere );

		}

		function isSphereViewable( sphere ) {

			if ( ! _frustum.intersectsSphere( sphere ) ) return false;

			var numPlanes = _clipping.numPlanes;

			if ( numPlanes === 0 ) return true;

			var planes = _this.clippingPlanes,

				center = sphere.center,
				negRad = - sphere.radius,
				i = 0;

			do {

				// out when deeper than radius in the negative halfspace
				if ( planes[ i ].distanceToPoint( center ) < negRad ) return false;

			} while ( ++ i !== numPlanes );

			return true;

		}
		*/

		function projectObject( object, camera, sortObjects ) {

			if ( object.visible === false ) return;

			var visible = object.layers.test( camera.layers );

			if ( visible ) {

				if ( object.isLight ) {

					lightsArray.push( object );

					if ( object.castShadow ) {

						shadowsArray.push( object );

					}

				} else if ( object.isSprite ) {

					if ( ! object.frustumCulled || _frustum.intersectsSprite( object ) ) {

						spritesArray.push( object );

					}

				} else if ( object.isLensFlare ) {

					flaresArray.push( object );

				} else if ( object.isImmediateRenderObject ) {

					if ( sortObjects ) {

						_vector3.setFromMatrixPosition( object.matrixWorld )
							.applyMatrix4( _projScreenMatrix );

					}

					currentRenderList.push( object, null, object.material, _vector3.z, null );

				} else if ( object.isMesh || object.isLine || object.isPoints ) {

					if ( object.isSkinnedMesh ) {

						object.skeleton.update();

					}

					if ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) {

						if ( sortObjects ) {

							_vector3.setFromMatrixPosition( object.matrixWorld )
								.applyMatrix4( _projScreenMatrix );

						}

						var geometry = objects.update( object );
						var material = object.material;

						if ( Array.isArray( material ) ) {

							var groups = geometry.groups;

							for ( var i = 0, l = groups.length; i < l; i ++ ) {

								var group = groups[ i ];
								var groupMaterial = material[ group.materialIndex ];

								if ( groupMaterial && groupMaterial.visible ) {

									currentRenderList.push( object, geometry, groupMaterial, _vector3.z, group );

								}

							}

						} else if ( material.visible ) {

							currentRenderList.push( object, geometry, material, _vector3.z, null );

						}

					}

				}

			}

			var children = object.children;

			for ( var i = 0, l = children.length; i < l; i ++ ) {

				projectObject( children[ i ], camera, sortObjects );

			}

		}

		function renderObjects( renderList, scene, camera, overrideMaterial ) {

			for ( var i = 0, l = renderList.length; i < l; i ++ ) {

				var renderItem = renderList[ i ];

				var object = renderItem.object;
				var geometry = renderItem.geometry;
				var material = overrideMaterial === undefined ? renderItem.material : overrideMaterial;
				var group = renderItem.group;

				if ( camera.isArrayCamera ) {

					_currentArrayCamera = camera;

					var cameras = camera.cameras;

					for ( var j = 0, jl = cameras.length; j < jl; j ++ ) {

						var camera2 = cameras[ j ];

						if ( object.layers.test( camera2.layers ) ) {

							var bounds = camera2.bounds;

							var x = bounds.x * _width;
							var y = bounds.y * _height;
							var width = bounds.z * _width;
							var height = bounds.w * _height;

							state.viewport( _currentViewport.set( x, y, width, height ).multiplyScalar( _pixelRatio ) );

							renderObject( object, scene, camera2, geometry, material, group );

						}

					}

				} else {

					_currentArrayCamera = null;

					renderObject( object, scene, camera, geometry, material, group );

				}

			}

		}

		function renderObject( object, scene, camera, geometry, material, group ) {

			object.onBeforeRender( _this, scene, camera, geometry, material, group );

			object.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, object.matrixWorld );
			object.normalMatrix.getNormalMatrix( object.modelViewMatrix );

			if ( object.isImmediateRenderObject ) {

				state.setMaterial( material );

				var program = setProgram( camera, scene.fog, material, object );

				_currentGeometryProgram = '';

				renderObjectImmediate( object, program, material );

			} else {

				_this.renderBufferDirect( camera, scene.fog, geometry, material, object, group );

			}

			object.onAfterRender( _this, scene, camera, geometry, material, group );

		}

		function initMaterial( material, fog, object ) {

			var materialProperties = properties.get( material );

			var parameters = programCache.getParameters(
				material, lights.state, shadowsArray, fog, _clipping.numPlanes, _clipping.numIntersection, object );

			var code = programCache.getProgramCode( material, parameters );

			var program = materialProperties.program;
			var programChange = true;

			if ( program === undefined ) {

				// new material
				material.addEventListener( 'dispose', onMaterialDispose );

			} else if ( program.code !== code ) {

				// changed glsl or parameters
				releaseMaterialProgramReference( material );

			} else if ( parameters.shaderID !== undefined ) {

				// same glsl and uniform list
				return;

			} else {

				// only rebuild uniform list
				programChange = false;

			}

			if ( programChange ) {

				if ( parameters.shaderID ) {

					var shader = ShaderLib[ parameters.shaderID ];

					materialProperties.shader = {
						name: material.type,
						uniforms: UniformsUtils.clone( shader.uniforms ),
						vertexShader: shader.vertexShader,
						fragmentShader: shader.fragmentShader
					};

				} else {

					materialProperties.shader = {
						name: material.type,
						uniforms: material.uniforms,
						vertexShader: material.vertexShader,
						fragmentShader: material.fragmentShader
					};

				}

				material.onBeforeCompile( materialProperties.shader );

				program = programCache.acquireProgram( material, materialProperties.shader, parameters, code );

				materialProperties.program = program;
				material.program = program;

			}

			var programAttributes = program.getAttributes();

			if ( material.morphTargets ) {

				material.numSupportedMorphTargets = 0;

				for ( var i = 0; i < _this.maxMorphTargets; i ++ ) {

					if ( programAttributes[ 'morphTarget' + i ] >= 0 ) {

						material.numSupportedMorphTargets ++;

					}

				}

			}

			if ( material.morphNormals ) {

				material.numSupportedMorphNormals = 0;

				for ( var i = 0; i < _this.maxMorphNormals; i ++ ) {

					if ( programAttributes[ 'morphNormal' + i ] >= 0 ) {

						material.numSupportedMorphNormals ++;

					}

				}

			}

			var uniforms = materialProperties.shader.uniforms;

			if ( ! material.isShaderMaterial &&
				! material.isRawShaderMaterial ||
				material.clipping === true ) {

				materialProperties.numClippingPlanes = _clipping.numPlanes;
				materialProperties.numIntersection = _clipping.numIntersection;
				uniforms.clippingPlanes = _clipping.uniform;

			}

			materialProperties.fog = fog;

			// store the light setup it was created for

			materialProperties.lightsHash = lights.state.hash;

			if ( material.lights ) {

				// wire up the material to this renderer's lighting state

				uniforms.ambientLightColor.value = lights.state.ambient;
				uniforms.directionalLights.value = lights.state.directional;
				uniforms.spotLights.value = lights.state.spot;
				uniforms.rectAreaLights.value = lights.state.rectArea;
				uniforms.pointLights.value = lights.state.point;
				uniforms.hemisphereLights.value = lights.state.hemi;

				uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
				uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
				uniforms.spotShadowMap.value = lights.state.spotShadowMap;
				uniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;
				uniforms.pointShadowMap.value = lights.state.pointShadowMap;
				uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;
				// TODO (abelnation): add area lights shadow info to uniforms

			}

			var progUniforms = materialProperties.program.getUniforms(),
				uniformsList =
					WebGLUniforms.seqWithValue( progUniforms.seq, uniforms );

			materialProperties.uniformsList = uniformsList;

		}

		function setProgram( camera, fog, material, object ) {

			_usedTextureUnits = 0;

			var materialProperties = properties.get( material );

			if ( _clippingEnabled ) {

				if ( _localClippingEnabled || camera !== _currentCamera ) {

					var useCache =
						camera === _currentCamera &&
						material.id === _currentMaterialId;

					// we might want to call this function with some ClippingGroup
					// object instead of the material, once it becomes feasible
					// (#8465, #8379)
					_clipping.setState(
						material.clippingPlanes, material.clipIntersection, material.clipShadows,
						camera, materialProperties, useCache );

				}

			}

			if ( material.needsUpdate === false ) {

				if ( materialProperties.program === undefined ) {

					material.needsUpdate = true;

				} else if ( material.fog && materialProperties.fog !== fog ) {

					material.needsUpdate = true;

				} else if ( material.lights && materialProperties.lightsHash !== lights.state.hash ) {

					material.needsUpdate = true;

				} else if ( materialProperties.numClippingPlanes !== undefined &&
					( materialProperties.numClippingPlanes !== _clipping.numPlanes ||
					materialProperties.numIntersection !== _clipping.numIntersection ) ) {

					material.needsUpdate = true;

				}

			}

			if ( material.needsUpdate ) {

				initMaterial( material, fog, object );
				material.needsUpdate = false;

			}

			var refreshProgram = false;
			var refreshMaterial = false;
			var refreshLights = false;

			var program = materialProperties.program,
				p_uniforms = program.getUniforms(),
				m_uniforms = materialProperties.shader.uniforms;

			if ( state.useProgram( program.program ) ) {

				refreshProgram = true;
				refreshMaterial = true;
				refreshLights = true;

			}

			if ( material.id !== _currentMaterialId ) {

				_currentMaterialId = material.id;

				refreshMaterial = true;

			}

			if ( refreshProgram || camera !== _currentCamera ) {

				p_uniforms.setValue( _gl, 'projectionMatrix', camera.projectionMatrix );

				if ( capabilities.logarithmicDepthBuffer ) {

					p_uniforms.setValue( _gl, 'logDepthBufFC',
						2.0 / ( Math.log( camera.far + 1.0 ) / Math.LN2 ) );

				}

				// Avoid unneeded uniform updates per ArrayCamera's sub-camera

				if ( _currentCamera !== ( _currentArrayCamera || camera ) ) {

					_currentCamera = ( _currentArrayCamera || camera );

					// lighting uniforms depend on the camera so enforce an update
					// now, in case this material supports lights - or later, when
					// the next material that does gets activated:

					refreshMaterial = true;		// set to true on material change
					refreshLights = true;		// remains set until update done

				}

				// load material specific uniforms
				// (shader material also gets them for the sake of genericity)

				if ( material.isShaderMaterial ||
					material.isMeshPhongMaterial ||
					material.isMeshStandardMaterial ||
					material.envMap ) {

					var uCamPos = p_uniforms.map.cameraPosition;

					if ( uCamPos !== undefined ) {

						uCamPos.setValue( _gl,
							_vector3.setFromMatrixPosition( camera.matrixWorld ) );

					}

				}

				if ( material.isMeshPhongMaterial ||
					material.isMeshLambertMaterial ||
					material.isMeshBasicMaterial ||
					material.isMeshStandardMaterial ||
					material.isShaderMaterial ||
					material.skinning ) {

					p_uniforms.setValue( _gl, 'viewMatrix', camera.matrixWorldInverse );

				}

			}

			// skinning uniforms must be set even if material didn't change
			// auto-setting of texture unit for bone texture must go before other textures
			// not sure why, but otherwise weird things happen

			if ( material.skinning ) {

				p_uniforms.setOptional( _gl, object, 'bindMatrix' );
				p_uniforms.setOptional( _gl, object, 'bindMatrixInverse' );

				var skeleton = object.skeleton;

				if ( skeleton ) {

					var bones = skeleton.bones;

					if ( capabilities.floatVertexTextures ) {

						if ( skeleton.boneTexture === undefined ) {

							// layout (1 matrix = 4 pixels)
							//      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
							//  with  8x8  pixel texture max   16 bones * 4 pixels =  (8 * 8)
							//       16x16 pixel texture max   64 bones * 4 pixels = (16 * 16)
							//       32x32 pixel texture max  256 bones * 4 pixels = (32 * 32)
							//       64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)


							var size = Math.sqrt( bones.length * 4 ); // 4 pixels needed for 1 matrix
							size = _Math.ceilPowerOfTwo( size );
							size = Math.max( size, 4 );

							var boneMatrices = new Float32Array( size * size * 4 ); // 4 floats per RGBA pixel
							boneMatrices.set( skeleton.boneMatrices ); // copy current values

							var boneTexture = new DataTexture( boneMatrices, size, size, RGBAFormat, FloatType );

							skeleton.boneMatrices = boneMatrices;
							skeleton.boneTexture = boneTexture;
							skeleton.boneTextureSize = size;

						}

						p_uniforms.setValue( _gl, 'boneTexture', skeleton.boneTexture );
						p_uniforms.setValue( _gl, 'boneTextureSize', skeleton.boneTextureSize );

					} else {

						p_uniforms.setOptional( _gl, skeleton, 'boneMatrices' );

					}

				}

			}

			if ( refreshMaterial ) {

				p_uniforms.setValue( _gl, 'toneMappingExposure', _this.toneMappingExposure );
				p_uniforms.setValue( _gl, 'toneMappingWhitePoint', _this.toneMappingWhitePoint );

				if ( material.lights ) {

					// the current material requires lighting info

					// note: all lighting uniforms are always set correctly
					// they simply reference the renderer's state for their
					// values
					//
					// use the current material's .needsUpdate flags to set
					// the GL state when required

					markUniformsLightsNeedsUpdate( m_uniforms, refreshLights );

				}

				// refresh uniforms common to several materials

				if ( fog && material.fog ) {

					refreshUniformsFog( m_uniforms, fog );

				}

				if ( material.isMeshBasicMaterial ) {

					refreshUniformsCommon( m_uniforms, material );

				} else if ( material.isMeshLambertMaterial ) {

					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsLambert( m_uniforms, material );

				} else if ( material.isMeshPhongMaterial ) {

					refreshUniformsCommon( m_uniforms, material );

					if ( material.isMeshToonMaterial ) {

						refreshUniformsToon( m_uniforms, material );

					} else {

						refreshUniformsPhong( m_uniforms, material );

					}

				} else if ( material.isMeshStandardMaterial ) {

					refreshUniformsCommon( m_uniforms, material );

					if ( material.isMeshPhysicalMaterial ) {

						refreshUniformsPhysical( m_uniforms, material );

					} else {

						refreshUniformsStandard( m_uniforms, material );

					}

				} else if ( material.isMeshDepthMaterial ) {

					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsDepth( m_uniforms, material );

				} else if ( material.isMeshDistanceMaterial ) {

					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsDistance( m_uniforms, material );

				} else if ( material.isMeshNormalMaterial ) {

					refreshUniformsCommon( m_uniforms, material );
					refreshUniformsNormal( m_uniforms, material );

				} else if ( material.isLineBasicMaterial ) {

					refreshUniformsLine( m_uniforms, material );

					if ( material.isLineDashedMaterial ) {

						refreshUniformsDash( m_uniforms, material );

					}

				} else if ( material.isPointsMaterial ) {

					refreshUniformsPoints( m_uniforms, material );

				} else if ( material.isShadowMaterial ) {

					m_uniforms.color.value = material.color;
					m_uniforms.opacity.value = material.opacity;

				}

				// RectAreaLight Texture
				// TODO (mrdoob): Find a nicer implementation

				if ( m_uniforms.ltcMat !== undefined ) m_uniforms.ltcMat.value = UniformsLib.LTC_MAT_TEXTURE;
				if ( m_uniforms.ltcMag !== undefined ) m_uniforms.ltcMag.value = UniformsLib.LTC_MAG_TEXTURE;

				WebGLUniforms.upload(
					_gl, materialProperties.uniformsList, m_uniforms, _this );

			}


			// common matrices

			p_uniforms.setValue( _gl, 'modelViewMatrix', object.modelViewMatrix );
			p_uniforms.setValue( _gl, 'normalMatrix', object.normalMatrix );
			p_uniforms.setValue( _gl, 'modelMatrix', object.matrixWorld );

			return program;

		}

		// Uniforms (refresh uniforms objects)

		function refreshUniformsCommon( uniforms, material ) {

			uniforms.opacity.value = material.opacity;

			if ( material.color ) {

				uniforms.diffuse.value = material.color;

			}

			if ( material.emissive ) {

				uniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );

			}

			if ( material.map ) {

				uniforms.map.value = material.map;

			}

			if ( material.alphaMap ) {

				uniforms.alphaMap.value = material.alphaMap;

			}

			if ( material.specularMap ) {

				uniforms.specularMap.value = material.specularMap;

			}

			if ( material.envMap ) {

				uniforms.envMap.value = material.envMap;

				// don't flip CubeTexture envMaps, flip everything else:
				//  WebGLRenderTargetCube will be flipped for backwards compatibility
				//  WebGLRenderTargetCube.texture will be flipped because it's a Texture and NOT a CubeTexture
				// this check must be handled differently, or removed entirely, if WebGLRenderTargetCube uses a CubeTexture in the future
				uniforms.flipEnvMap.value = ( ! ( material.envMap && material.envMap.isCubeTexture ) ) ? 1 : - 1;

				uniforms.reflectivity.value = material.reflectivity;
				uniforms.refractionRatio.value = material.refractionRatio;

			}

			if ( material.lightMap ) {

				uniforms.lightMap.value = material.lightMap;
				uniforms.lightMapIntensity.value = material.lightMapIntensity;

			}

			if ( material.aoMap ) {

				uniforms.aoMap.value = material.aoMap;
				uniforms.aoMapIntensity.value = material.aoMapIntensity;

			}

			// uv repeat and offset setting priorities
			// 1. color map
			// 2. specular map
			// 3. normal map
			// 4. bump map
			// 5. alpha map
			// 6. emissive map

			var uvScaleMap;

			if ( material.map ) {

				uvScaleMap = material.map;

			} else if ( material.specularMap ) {

				uvScaleMap = material.specularMap;

			} else if ( material.displacementMap ) {

				uvScaleMap = material.displacementMap;

			} else if ( material.normalMap ) {

				uvScaleMap = material.normalMap;

			} else if ( material.bumpMap ) {

				uvScaleMap = material.bumpMap;

			} else if ( material.roughnessMap ) {

				uvScaleMap = material.roughnessMap;

			} else if ( material.metalnessMap ) {

				uvScaleMap = material.metalnessMap;

			} else if ( material.alphaMap ) {

				uvScaleMap = material.alphaMap;

			} else if ( material.emissiveMap ) {

				uvScaleMap = material.emissiveMap;

			}

			if ( uvScaleMap !== undefined ) {

				// backwards compatibility
				if ( uvScaleMap.isWebGLRenderTarget ) {

					uvScaleMap = uvScaleMap.texture;

				}

				if ( uvScaleMap.matrixAutoUpdate === true ) {

					var offset = uvScaleMap.offset;
					var repeat = uvScaleMap.repeat;
					var rotation = uvScaleMap.rotation;
					var center = uvScaleMap.center;

					uvScaleMap.matrix.setUvTransform( offset.x, offset.y, repeat.x, repeat.y, rotation, center.x, center.y );

				}

				uniforms.uvTransform.value.copy( uvScaleMap.matrix );

			}

		}

		function refreshUniformsLine( uniforms, material ) {

			uniforms.diffuse.value = material.color;
			uniforms.opacity.value = material.opacity;

		}

		function refreshUniformsDash( uniforms, material ) {

			uniforms.dashSize.value = material.dashSize;
			uniforms.totalSize.value = material.dashSize + material.gapSize;
			uniforms.scale.value = material.scale;

		}

		function refreshUniformsPoints( uniforms, material ) {

			uniforms.diffuse.value = material.color;
			uniforms.opacity.value = material.opacity;
			uniforms.size.value = material.size * _pixelRatio;
			uniforms.scale.value = _height * 0.5;

			uniforms.map.value = material.map;

			if ( material.map !== null ) {

				if ( material.map.matrixAutoUpdate === true ) {

					var offset = material.map.offset;
					var repeat = material.map.repeat;
					var rotation = material.map.rotation;
					var center = material.map.center;

					material.map.matrix.setUvTransform( offset.x, offset.y, repeat.x, repeat.y, rotation, center.x, center.y );

				}

				uniforms.uvTransform.value.copy( material.map.matrix );

			}

		}

		function refreshUniformsFog( uniforms, fog ) {

			uniforms.fogColor.value = fog.color;

			if ( fog.isFog ) {

				uniforms.fogNear.value = fog.near;
				uniforms.fogFar.value = fog.far;

			} else if ( fog.isFogExp2 ) {

				uniforms.fogDensity.value = fog.density;

			}

		}

		function refreshUniformsLambert( uniforms, material ) {

			if ( material.emissiveMap ) {

				uniforms.emissiveMap.value = material.emissiveMap;

			}

		}

		function refreshUniformsPhong( uniforms, material ) {

			uniforms.specular.value = material.specular;
			uniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )

			if ( material.emissiveMap ) {

				uniforms.emissiveMap.value = material.emissiveMap;

			}

			if ( material.bumpMap ) {

				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;

			}

			if ( material.normalMap ) {

				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy( material.normalScale );

			}

			if ( material.displacementMap ) {

				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;

			}

		}

		function refreshUniformsToon( uniforms, material ) {

			refreshUniformsPhong( uniforms, material );

			if ( material.gradientMap ) {

				uniforms.gradientMap.value = material.gradientMap;

			}

		}

		function refreshUniformsStandard( uniforms, material ) {

			uniforms.roughness.value = material.roughness;
			uniforms.metalness.value = material.metalness;

			if ( material.roughnessMap ) {

				uniforms.roughnessMap.value = material.roughnessMap;

			}

			if ( material.metalnessMap ) {

				uniforms.metalnessMap.value = material.metalnessMap;

			}

			if ( material.emissiveMap ) {

				uniforms.emissiveMap.value = material.emissiveMap;

			}

			if ( material.bumpMap ) {

				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;

			}

			if ( material.normalMap ) {

				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy( material.normalScale );

			}

			if ( material.displacementMap ) {

				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;

			}

			if ( material.envMap ) {

				//uniforms.envMap.value = material.envMap; // part of uniforms common
				uniforms.envMapIntensity.value = material.envMapIntensity;

			}

		}

		function refreshUniformsPhysical( uniforms, material ) {

			uniforms.clearCoat.value = material.clearCoat;
			uniforms.clearCoatRoughness.value = material.clearCoatRoughness;

			refreshUniformsStandard( uniforms, material );

		}

		function refreshUniformsDepth( uniforms, material ) {

			if ( material.displacementMap ) {

				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;

			}

		}

		function refreshUniformsDistance( uniforms, material ) {

			if ( material.displacementMap ) {

				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;

			}

			uniforms.referencePosition.value.copy( material.referencePosition );
			uniforms.nearDistance.value = material.nearDistance;
			uniforms.farDistance.value = material.farDistance;

		}

		function refreshUniformsNormal( uniforms, material ) {

			if ( material.bumpMap ) {

				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;

			}

			if ( material.normalMap ) {

				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy( material.normalScale );

			}

			if ( material.displacementMap ) {

				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;

			}

		}

		// If uniforms are marked as clean, they don't need to be loaded to the GPU.

		function markUniformsLightsNeedsUpdate( uniforms, value ) {

			uniforms.ambientLightColor.needsUpdate = value;

			uniforms.directionalLights.needsUpdate = value;
			uniforms.pointLights.needsUpdate = value;
			uniforms.spotLights.needsUpdate = value;
			uniforms.rectAreaLights.needsUpdate = value;
			uniforms.hemisphereLights.needsUpdate = value;

		}

		// GL state setting

		this.setFaceCulling = function ( cullFace, frontFaceDirection ) {

			state.setCullFace( cullFace );
			state.setFlipSided( frontFaceDirection === FrontFaceDirectionCW );

		};

		// Textures

		function allocTextureUnit() {

			var textureUnit = _usedTextureUnits;

			if ( textureUnit >= capabilities.maxTextures ) {

				console.warn( 'THREE.WebGLRenderer: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + capabilities.maxTextures );

			}

			_usedTextureUnits += 1;

			return textureUnit;

		}

		this.allocTextureUnit = allocTextureUnit;

		// this.setTexture2D = setTexture2D;
		this.setTexture2D = ( function () {

			var warned = false;

			// backwards compatibility: peel texture.texture
			return function setTexture2D( texture, slot ) {

				if ( texture && texture.isWebGLRenderTarget ) {

					if ( ! warned ) {

						console.warn( "THREE.WebGLRenderer.setTexture2D: don't use render targets as textures. Use their .texture property instead." );
						warned = true;

					}

					texture = texture.texture;

				}

				textures.setTexture2D( texture, slot );

			};

		}() );

		this.setTexture = ( function () {

			var warned = false;

			return function setTexture( texture, slot ) {

				if ( ! warned ) {

					console.warn( "THREE.WebGLRenderer: .setTexture is deprecated, use setTexture2D instead." );
					warned = true;

				}

				textures.setTexture2D( texture, slot );

			};

		}() );

		this.setTextureCube = ( function () {

			var warned = false;

			return function setTextureCube( texture, slot ) {

				// backwards compatibility: peel texture.texture
				if ( texture && texture.isWebGLRenderTargetCube ) {

					if ( ! warned ) {

						console.warn( "THREE.WebGLRenderer.setTextureCube: don't use cube render targets as textures. Use their .texture property instead." );
						warned = true;

					}

					texture = texture.texture;

				}

				// currently relying on the fact that WebGLRenderTargetCube.texture is a Texture and NOT a CubeTexture
				// TODO: unify these code paths
				if ( ( texture && texture.isCubeTexture ) ||
					( Array.isArray( texture.image ) && texture.image.length === 6 ) ) {

					// CompressedTexture can have Array in image :/

					// this function alone should take care of cube textures
					textures.setTextureCube( texture, slot );

				} else {

					// assumed: texture property of THREE.WebGLRenderTargetCube

					textures.setTextureCubeDynamic( texture, slot );

				}

			};

		}() );

		this.getRenderTarget = function () {

			return _currentRenderTarget;

		};

		this.setRenderTarget = function ( renderTarget ) {

			_currentRenderTarget = renderTarget;

			if ( renderTarget && properties.get( renderTarget ).__webglFramebuffer === undefined ) {

				textures.setupRenderTarget( renderTarget );

			}

			var framebuffer = null;
			var isCube = false;

			if ( renderTarget ) {

				var __webglFramebuffer = properties.get( renderTarget ).__webglFramebuffer;

				if ( renderTarget.isWebGLRenderTargetCube ) {

					framebuffer = __webglFramebuffer[ renderTarget.activeCubeFace ];
					isCube = true;

				} else {

					framebuffer = __webglFramebuffer;

				}

				_currentViewport.copy( renderTarget.viewport );
				_currentScissor.copy( renderTarget.scissor );
				_currentScissorTest = renderTarget.scissorTest;

			} else {

				_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio );
				_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio );
				_currentScissorTest = _scissorTest;

			}

			if ( _currentFramebuffer !== framebuffer ) {

				_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
				_currentFramebuffer = framebuffer;

			}

			state.viewport( _currentViewport );
			state.scissor( _currentScissor );
			state.setScissorTest( _currentScissorTest );

			if ( isCube ) {

				var textureProperties = properties.get( renderTarget.texture );
				_gl.framebufferTexture2D( _gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + renderTarget.activeCubeFace, textureProperties.__webglTexture, renderTarget.activeMipMapLevel );

			}

		};

		this.readRenderTargetPixels = function ( renderTarget, x, y, width, height, buffer ) {

			if ( ! ( renderTarget && renderTarget.isWebGLRenderTarget ) ) {

				console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.' );
				return;

			}

			var framebuffer = properties.get( renderTarget ).__webglFramebuffer;

			if ( framebuffer ) {

				var restore = false;

				if ( framebuffer !== _currentFramebuffer ) {

					_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );

					restore = true;

				}

				try {

					var texture = renderTarget.texture;
					var textureFormat = texture.format;
					var textureType = texture.type;

					if ( textureFormat !== RGBAFormat && utils.convert( textureFormat ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_FORMAT ) ) {

						console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.' );
						return;

					}

					if ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_TYPE ) && // IE11, Edge and Chrome Mac < 52 (#9513)
						! ( textureType === FloatType && ( extensions.get( 'OES_texture_float' ) || extensions.get( 'WEBGL_color_buffer_float' ) ) ) && // Chrome Mac >= 52 and Firefox
						! ( textureType === HalfFloatType && extensions.get( 'EXT_color_buffer_half_float' ) ) ) {

						console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );
						return;

					}

					if ( _gl.checkFramebufferStatus( _gl.FRAMEBUFFER ) === _gl.FRAMEBUFFER_COMPLETE ) {

						// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)

						if ( ( x >= 0 && x <= ( renderTarget.width - width ) ) && ( y >= 0 && y <= ( renderTarget.height - height ) ) ) {

							_gl.readPixels( x, y, width, height, utils.convert( textureFormat ), utils.convert( textureType ), buffer );

						}

					} else {

						console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.' );

					}

				} finally {

					if ( restore ) {

						_gl.bindFramebuffer( _gl.FRAMEBUFFER, _currentFramebuffer );

					}

				}

			}

		};

	}

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	// DEBUGGING
	//
	// HELPERS
	//

	function testEdges( vertList, idxList, numAfter, assert ) {

		var geoms = createGeometries( vertList, idxList );

		for ( var i = 0; i < geoms.length; i ++ ) {

			var geom = geoms[ i ];

			var numBefore = idxList.length;
			assert.equal( countEdges( geom ), numBefore, "Edges before!" );

			var egeom = new EdgesGeometry( geom );

			assert.equal( countEdges( egeom ), numAfter, "Edges after!" );
			output( geom, egeom );

		}

	}

	function createGeometries( vertList, idxList ) {

		var geomIB = createIndexedBufferGeometry( vertList, idxList );
		var geom = new Geometry().fromBufferGeometry( geomIB );
		var geomB = new BufferGeometry().fromGeometry( geom );
		var geomDC = addDrawCalls( geomIB.clone() );
		return [ geom, geomB, geomIB, geomDC ];

	}

	function createIndexedBufferGeometry( vertList, idxList ) {

		var geom = new BufferGeometry();

		var indexTable = [];
		var numTris = idxList.length / 3;
		var numVerts = 0;

		var indices = new Uint32Array( numTris * 3 );
		var vertices = new Float32Array( vertList.length * 3 );

		for ( var i = 0; i < numTris; i ++ ) {

			for ( var j = 0; j < 3; j ++ ) {

				var idx = idxList[ 3 * i + j ];
				if ( indexTable[ idx ] === undefined ) {

					var v = vertList[ idx ];
					vertices[ 3 * numVerts ] = v.x;
					vertices[ 3 * numVerts + 1 ] = v.y;
					vertices[ 3 * numVerts + 2 ] = v.z;

					indexTable[ idx ] = numVerts;

					numVerts ++;

				}

				indices[ 3 * i + j ] = indexTable[ idx ];

			}

		}

		vertices = vertices.subarray( 0, 3 * numVerts );

		geom.setIndex( new BufferAttribute( indices, 1 ) );
		geom.addAttribute( 'position', new BufferAttribute( vertices, 3 ) );

		geom.computeFaceNormals();

		return geom;

	}

	function addDrawCalls( geometry ) {

		var numTris = geometry.index.count / 3;

		for ( var i = 0; i < numTris; i ++ ) {

			var start = i * 3;
			var count = 3;

			geometry.addGroup( start, count );

		}

		return geometry;

	}

	function countEdges( geom ) {

		if ( geom instanceof EdgesGeometry ) {

			return geom.getAttribute( 'position' ).count / 2;

		}

		if ( geom.faces !== undefined ) {

			return geom.faces.length * 3;

		}

		var indices = geom.index;
		if ( indices ) {

			return indices.count;

		}

		return geom.getAttribute( 'position' ).count;

	}

	//
	// DEBUGGING
	//
	var DEBUG = false;
	var renderer;
	var camera;
	var scene = new Scene();
	var xoffset = 0;

	function output( geom, egeom ) {

		if ( DEBUG !== true ) return;

		if ( ! renderer ) initDebug();

		var mesh = new Mesh( geom, undefined );
		var edges = new LineSegments( egeom, new LineBasicMaterial( { color: 'black' } ) );

		mesh.position.setX( xoffset );
		edges.position.setX( xoffset ++ );
		scene.add( mesh );
		scene.add( edges );

		if ( scene.children.length % 8 === 0 ) {

			xoffset += 2;

		}

	}

	function initDebug() {

		renderer = new WebGLRenderer( {

			antialias: true

		} );

		var width = 600;
		var height = 480;

		renderer.setSize( width, height );
		renderer.setClearColor( 0xCCCCCC );

		camera = new PerspectiveCamera( 45, width / height, 1, 100 );
		camera.position.x = 30;
		camera.position.z = 40;
		camera.lookAt( new Vector3( 30, 0, 0 ) );

		document.body.appendChild( renderer.domElement );

		var controls = new THREE.OrbitControls( camera, renderer.domElement ); // TODO: please do somethings for that -_-'
		controls.target = new Vector3( 30, 0, 0 );

		animate();

		function animate() {

			requestAnimationFrame( animate );

			controls.update();

			renderer.render( scene, camera );

		}

	}

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'EdgesGeometry', () => {

			var vertList = [
				new Vector3( 0, 0, 0 ),
				new Vector3( 1, 0, 0 ),
				new Vector3( 1, 1, 0 ),
				new Vector3( 0, 1, 0 ),
				new Vector3( 1, 1, 1 ),
			];

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "singularity", ( assert ) => {

				testEdges( vertList, [ 1, 1, 1 ], 0, assert );

			} );

			QUnit.test( "needle", ( assert ) => {

				testEdges( vertList, [ 0, 0, 1 ], 0, assert );

			} );

			QUnit.test( "single triangle", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2 ], 3, assert );

			} );

			QUnit.test( "two isolated triangles", ( assert ) => {

				var vertList = [
					new Vector3( 0, 0, 0 ),
					new Vector3( 1, 0, 0 ),
					new Vector3( 1, 1, 0 ),
					new Vector3( 0, 0, 1 ),
					new Vector3( 1, 0, 1 ),
					new Vector3( 1, 1, 1 ),
				];

				testEdges( vertList, [ 0, 1, 2, 3, 4, 5 ], 6, assert );

			} );

			QUnit.test( "two flat triangles", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2, 0, 2, 3 ], 4, assert );

			} );

			QUnit.test( "two flat triangles, inverted", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2, 0, 3, 2 ], 5, assert );

			} );

			QUnit.test( "two non-coplanar triangles", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2, 0, 4, 2 ], 5, assert );

			} );

			QUnit.test( "three triangles, coplanar first", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2, 0, 2, 3, 0, 4, 2 ], 7, assert );

			} );

			QUnit.test( "three triangles, coplanar last", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2, 0, 4, 2, 0, 2, 3 ], 6, assert ); // Should be 7

			} );

			QUnit.test( "tetrahedron", ( assert ) => {

				testEdges( vertList, [ 0, 1, 2, 0, 1, 4, 0, 4, 2, 1, 2, 4 ], 6, assert );

			} );

		} );

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 *
	 * Creates extruded geometry from a path shape.
	 *
	 * parameters = {
	 *
	 *  curveSegments: <int>, // number of points on the curves
	 *  steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too
	 *  amount: <int>, // Depth to extrude the shape
	 *
	 *  bevelEnabled: <bool>, // turn on bevel
	 *  bevelThickness: <float>, // how deep into the original shape bevel goes
	 *  bevelSize: <float>, // how far from shape outline is bevel
	 *  bevelSegments: <int>, // number of bevel layers
	 *
	 *  extrudePath: <THREE.Curve> // curve to extrude shape along
	 *  frames: <Object> // containing arrays of tangents, normals, binormals
	 *
	 *  UVGenerator: <Object> // object that provides UV generator functions
	 *
	 * }
	 */

	// ExtrudeGeometry

	function ExtrudeGeometry( shapes, options ) {

		Geometry.call( this );

		this.type = 'ExtrudeGeometry';

		this.parameters = {
			shapes: shapes,
			options: options
		};

		this.fromBufferGeometry( new ExtrudeBufferGeometry( shapes, options ) );
		this.mergeVertices();

	}

	ExtrudeGeometry.prototype = Object.create( Geometry.prototype );
	ExtrudeGeometry.prototype.constructor = ExtrudeGeometry;

	// ExtrudeBufferGeometry

	function ExtrudeBufferGeometry( shapes, options ) {

		if ( typeof ( shapes ) === "undefined" ) {

			return;

		}

		BufferGeometry.call( this );

		this.type = 'ExtrudeBufferGeometry';

		shapes = Array.isArray( shapes ) ? shapes : [ shapes ];

		this.addShapeList( shapes, options );

		this.computeVertexNormals();

		// can't really use automatic vertex normals
		// as then front and back sides get smoothed too
		// should do separate smoothing just for sides

		//this.computeVertexNormals();

		//console.log( "took", ( Date.now() - startTime ) );

	}

	ExtrudeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	ExtrudeBufferGeometry.prototype.constructor = ExtrudeBufferGeometry;

	ExtrudeBufferGeometry.prototype.getArrays = function () {

		var positionAttribute = this.getAttribute( "position" );
		var verticesArray = positionAttribute ? Array.prototype.slice.call( positionAttribute.array ) : [];

		var uvAttribute = this.getAttribute( "uv" );
		var uvArray = uvAttribute ? Array.prototype.slice.call( uvAttribute.array ) : [];

		var IndexAttribute = this.index;
		var indicesArray = IndexAttribute ? Array.prototype.slice.call( IndexAttribute.array ) : [];

		return {
			position: verticesArray,
			uv: uvArray,
			index: indicesArray
		};

	};

	ExtrudeBufferGeometry.prototype.addShapeList = function ( shapes, options ) {

		var sl = shapes.length;
		options.arrays = this.getArrays();

		for ( var s = 0; s < sl; s ++ ) {

			var shape = shapes[ s ];
			this.addShape( shape, options );

		}

		this.setIndex( options.arrays.index );
		this.addAttribute( 'position', new Float32BufferAttribute( options.arrays.position, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( options.arrays.uv, 2 ) );

	};

	ExtrudeBufferGeometry.prototype.addShape = function ( shape, options ) {

		var arrays = options.arrays ? options.arrays : this.getArrays();
		var verticesArray = arrays.position;
		var indicesArray = arrays.index;
		var uvArray = arrays.uv;

		var placeholder = [];


		var amount = options.amount !== undefined ? options.amount : 100;

		var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6; // 10
		var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2; // 8
		var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;

		var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true; // false

		var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;

		var steps = options.steps !== undefined ? options.steps : 1;

		var extrudePath = options.extrudePath;
		var extrudePts, extrudeByPath = false;

		// Use default WorldUVGenerator if no UV generators are specified.
		var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : ExtrudeGeometry.WorldUVGenerator;

		var splineTube, binormal, normal, position2;
		if ( extrudePath ) {

			extrudePts = extrudePath.getSpacedPoints( steps );

			extrudeByPath = true;
			bevelEnabled = false; // bevels not supported for path extrusion

			// SETUP TNB variables

			// TODO1 - have a .isClosed in spline?

			splineTube = options.frames !== undefined ? options.frames : extrudePath.computeFrenetFrames( steps, false );

			// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);

			binormal = new Vector3();
			normal = new Vector3();
			position2 = new Vector3();

		}

		// Safeguards if bevels are not enabled

		if ( ! bevelEnabled ) {

			bevelSegments = 0;
			bevelThickness = 0;
			bevelSize = 0;

		}

		// Variables initialization

		var ahole, h, hl; // looping of holes
		var scope = this;

		var shapePoints = shape.extractPoints( curveSegments );

		var vertices = shapePoints.shape;
		var holes = shapePoints.holes;

		var reverse = ! ShapeUtils.isClockWise( vertices );

		if ( reverse ) {

			vertices = vertices.reverse();

			// Maybe we should also check if holes are in the opposite direction, just to be safe ...

			for ( h = 0, hl = holes.length; h < hl; h ++ ) {

				ahole = holes[ h ];

				if ( ShapeUtils.isClockWise( ahole ) ) {

					holes[ h ] = ahole.reverse();

				}

			}

		}


		var faces = ShapeUtils.triangulateShape( vertices, holes );

		/* Vertices */

		var contour = vertices; // vertices has all points but contour has only points of circumference

		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

			ahole = holes[ h ];

			vertices = vertices.concat( ahole );

		}


		function scalePt2( pt, vec, size ) {

			if ( ! vec ) console.error( "THREE.ExtrudeGeometry: vec does not exist" );

			return vec.clone().multiplyScalar( size ).add( pt );

		}

		var b, bs, t, z,
			vert, vlen = vertices.length,
			face, flen = faces.length;


		// Find directions for point movement


		function getBevelVec( inPt, inPrev, inNext ) {

			// computes for inPt the corresponding point inPt' on a new contour
			//   shifted by 1 unit (length of normalized vector) to the left
			// if we walk along contour clockwise, this new contour is outside the old one
			//
			// inPt' is the intersection of the two lines parallel to the two
			//  adjacent edges of inPt at a distance of 1 unit on the left side.

			var v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt

			// good reading for geometry algorithms (here: line-line intersection)
			// http://geomalgorithms.com/a05-_intersect-1.html

			var v_prev_x = inPt.x - inPrev.x,
				v_prev_y = inPt.y - inPrev.y;
			var v_next_x = inNext.x - inPt.x,
				v_next_y = inNext.y - inPt.y;

			var v_prev_lensq = ( v_prev_x * v_prev_x + v_prev_y * v_prev_y );

			// check for collinear edges
			var collinear0 = ( v_prev_x * v_next_y - v_prev_y * v_next_x );

			if ( Math.abs( collinear0 ) > Number.EPSILON ) {

				// not collinear

				// length of vectors for normalizing

				var v_prev_len = Math.sqrt( v_prev_lensq );
				var v_next_len = Math.sqrt( v_next_x * v_next_x + v_next_y * v_next_y );

				// shift adjacent points by unit vectors to the left

				var ptPrevShift_x = ( inPrev.x - v_prev_y / v_prev_len );
				var ptPrevShift_y = ( inPrev.y + v_prev_x / v_prev_len );

				var ptNextShift_x = ( inNext.x - v_next_y / v_next_len );
				var ptNextShift_y = ( inNext.y + v_next_x / v_next_len );

				// scaling factor for v_prev to intersection point

				var sf = ( ( ptNextShift_x - ptPrevShift_x ) * v_next_y -
						( ptNextShift_y - ptPrevShift_y ) * v_next_x ) /
					( v_prev_x * v_next_y - v_prev_y * v_next_x );

				// vector from inPt to intersection point

				v_trans_x = ( ptPrevShift_x + v_prev_x * sf - inPt.x );
				v_trans_y = ( ptPrevShift_y + v_prev_y * sf - inPt.y );

				// Don't normalize!, otherwise sharp corners become ugly
				//  but prevent crazy spikes
				var v_trans_lensq = ( v_trans_x * v_trans_x + v_trans_y * v_trans_y );
				if ( v_trans_lensq <= 2 ) {

					return new Vector2( v_trans_x, v_trans_y );

				} else {

					shrink_by = Math.sqrt( v_trans_lensq / 2 );

				}

			} else {

				// handle special case of collinear edges

				var direction_eq = false; // assumes: opposite
				if ( v_prev_x > Number.EPSILON ) {

					if ( v_next_x > Number.EPSILON ) {

						direction_eq = true;

					}

				} else {

					if ( v_prev_x < - Number.EPSILON ) {

						if ( v_next_x < - Number.EPSILON ) {

							direction_eq = true;

						}

					} else {

						if ( Math.sign( v_prev_y ) === Math.sign( v_next_y ) ) {

							direction_eq = true;

						}

					}

				}

				if ( direction_eq ) {

					// console.log("Warning: lines are a straight sequence");
					v_trans_x = - v_prev_y;
					v_trans_y = v_prev_x;
					shrink_by = Math.sqrt( v_prev_lensq );

				} else {

					// console.log("Warning: lines are a straight spike");
					v_trans_x = v_prev_x;
					v_trans_y = v_prev_y;
					shrink_by = Math.sqrt( v_prev_lensq / 2 );

				}

			}

			return new Vector2( v_trans_x / shrink_by, v_trans_y / shrink_by );

		}


		var contourMovements = [];

		for ( var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

			if ( j === il ) j = 0;
			if ( k === il ) k = 0;

			//  (j)---(i)---(k)
			// console.log('i,j,k', i, j , k)

			contourMovements[ i ] = getBevelVec( contour[ i ], contour[ j ], contour[ k ] );

		}

		var holesMovements = [],
			oneHoleMovements, verticesMovements = contourMovements.concat();

		for ( h = 0, hl = holes.length; h < hl; h ++ ) {

			ahole = holes[ h ];

			oneHoleMovements = [];

			for ( i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {

				if ( j === il ) j = 0;
				if ( k === il ) k = 0;

				//  (j)---(i)---(k)
				oneHoleMovements[ i ] = getBevelVec( ahole[ i ], ahole[ j ], ahole[ k ] );

			}

			holesMovements.push( oneHoleMovements );
			verticesMovements = verticesMovements.concat( oneHoleMovements );

		}


		// Loop bevelSegments, 1 for the front, 1 for the back

		for ( b = 0; b < bevelSegments; b ++ ) {

			//for ( b = bevelSegments; b > 0; b -- ) {

			t = b / bevelSegments;
			z = bevelThickness * Math.cos( t * Math.PI / 2 );
			bs = bevelSize * Math.sin( t * Math.PI / 2 );

			// contract shape

			for ( i = 0, il = contour.length; i < il; i ++ ) {

				vert = scalePt2( contour[ i ], contourMovements[ i ], bs );

				v( vert.x, vert.y, - z );

			}

			// expand holes

			for ( h = 0, hl = holes.length; h < hl; h ++ ) {

				ahole = holes[ h ];
				oneHoleMovements = holesMovements[ h ];

				for ( i = 0, il = ahole.length; i < il; i ++ ) {

					vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );

					v( vert.x, vert.y, - z );

				}

			}

		}

		bs = bevelSize;

		// Back facing vertices

		for ( i = 0; i < vlen; i ++ ) {

			vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];

			if ( ! extrudeByPath ) {

				v( vert.x, vert.y, 0 );

			} else {

				// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );

				normal.copy( splineTube.normals[ 0 ] ).multiplyScalar( vert.x );
				binormal.copy( splineTube.binormals[ 0 ] ).multiplyScalar( vert.y );

				position2.copy( extrudePts[ 0 ] ).add( normal ).add( binormal );

				v( position2.x, position2.y, position2.z );

			}

		}

		// Add stepped vertices...
		// Including front facing vertices

		var s;

		for ( s = 1; s <= steps; s ++ ) {

			for ( i = 0; i < vlen; i ++ ) {

				vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];

				if ( ! extrudeByPath ) {

					v( vert.x, vert.y, amount / steps * s );

				} else {

					// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );

					normal.copy( splineTube.normals[ s ] ).multiplyScalar( vert.x );
					binormal.copy( splineTube.binormals[ s ] ).multiplyScalar( vert.y );

					position2.copy( extrudePts[ s ] ).add( normal ).add( binormal );

					v( position2.x, position2.y, position2.z );

				}

			}

		}


		// Add bevel segments planes

		//for ( b = 1; b <= bevelSegments; b ++ ) {
		for ( b = bevelSegments - 1; b >= 0; b -- ) {

			t = b / bevelSegments;
			z = bevelThickness * Math.cos( t * Math.PI / 2 );
			bs = bevelSize * Math.sin( t * Math.PI / 2 );

			// contract shape

			for ( i = 0, il = contour.length; i < il; i ++ ) {

				vert = scalePt2( contour[ i ], contourMovements[ i ], bs );
				v( vert.x, vert.y, amount + z );

			}

			// expand holes

			for ( h = 0, hl = holes.length; h < hl; h ++ ) {

				ahole = holes[ h ];
				oneHoleMovements = holesMovements[ h ];

				for ( i = 0, il = ahole.length; i < il; i ++ ) {

					vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );

					if ( ! extrudeByPath ) {

						v( vert.x, vert.y, amount + z );

					} else {

						v( vert.x, vert.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z );

					}

				}

			}

		}

		/* Faces */

		// Top and bottom faces

		buildLidFaces();

		// Sides faces

		buildSideFaces();


		/////  Internal functions

		function buildLidFaces() {

			var start = verticesArray.length / 3;

			if ( bevelEnabled ) {

				var layer = 0; // steps + 1
				var offset = vlen * layer;

				// Bottom faces

				for ( i = 0; i < flen; i ++ ) {

					face = faces[ i ];
					f3( face[ 2 ] + offset, face[ 1 ] + offset, face[ 0 ] + offset );

				}

				layer = steps + bevelSegments * 2;
				offset = vlen * layer;

				// Top faces

				for ( i = 0; i < flen; i ++ ) {

					face = faces[ i ];
					f3( face[ 0 ] + offset, face[ 1 ] + offset, face[ 2 ] + offset );

				}

			} else {

				// Bottom faces

				for ( i = 0; i < flen; i ++ ) {

					face = faces[ i ];
					f3( face[ 2 ], face[ 1 ], face[ 0 ] );

				}

				// Top faces

				for ( i = 0; i < flen; i ++ ) {

					face = faces[ i ];
					f3( face[ 0 ] + vlen * steps, face[ 1 ] + vlen * steps, face[ 2 ] + vlen * steps );

				}

			}

			scope.addGroup( start, verticesArray.length / 3 - start, options.material !== undefined ? options.material : 0 );

		}

		// Create faces for the z-sides of the shape

		function buildSideFaces() {

			var start = verticesArray.length / 3;
			var layeroffset = 0;
			sidewalls( contour, layeroffset );
			layeroffset += contour.length;

			for ( h = 0, hl = holes.length; h < hl; h ++ ) {

				ahole = holes[ h ];
				sidewalls( ahole, layeroffset );

				//, true
				layeroffset += ahole.length;

			}


			scope.addGroup( start, verticesArray.length / 3 - start, options.extrudeMaterial !== undefined ? options.extrudeMaterial : 1 );


		}

		function sidewalls( contour, layeroffset ) {

			var j, k;
			i = contour.length;

			while ( -- i >= 0 ) {

				j = i;
				k = i - 1;
				if ( k < 0 ) k = contour.length - 1;

				//console.log('b', i,j, i-1, k,vertices.length);

				var s = 0,
					sl = steps + bevelSegments * 2;

				for ( s = 0; s < sl; s ++ ) {

					var slen1 = vlen * s;
					var slen2 = vlen * ( s + 1 );

					var a = layeroffset + j + slen1,
						b = layeroffset + k + slen1,
						c = layeroffset + k + slen2,
						d = layeroffset + j + slen2;

					f4( a, b, c, d );

				}

			}

		}

		function v( x, y, z ) {

			placeholder.push( x );
			placeholder.push( y );
			placeholder.push( z );

		}


		function f3( a, b, c ) {

			addVertex( a );
			addVertex( b );
			addVertex( c );

			var nextIndex = verticesArray.length / 3;
			var uvs = uvgen.generateTopUV( scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1 );

			addUV( uvs[ 0 ] );
			addUV( uvs[ 1 ] );
			addUV( uvs[ 2 ] );

		}

		function f4( a, b, c, d ) {

			addVertex( a );
			addVertex( b );
			addVertex( d );

			addVertex( b );
			addVertex( c );
			addVertex( d );


			var nextIndex = verticesArray.length / 3;
			var uvs = uvgen.generateSideWallUV( scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1 );

			addUV( uvs[ 0 ] );
			addUV( uvs[ 1 ] );
			addUV( uvs[ 3 ] );

			addUV( uvs[ 1 ] );
			addUV( uvs[ 2 ] );
			addUV( uvs[ 3 ] );

		}

		function addVertex( index ) {

			indicesArray.push( verticesArray.length / 3 );
			verticesArray.push( placeholder[ index * 3 + 0 ] );
			verticesArray.push( placeholder[ index * 3 + 1 ] );
			verticesArray.push( placeholder[ index * 3 + 2 ] );

		}


		function addUV( vector2 ) {

			uvArray.push( vector2.x );
			uvArray.push( vector2.y );

		}

		if ( ! options.arrays ) {

			this.setIndex( indicesArray );
			this.addAttribute( 'position', new Float32BufferAttribute( verticesArray, 3 ) );
			this.addAttribute( 'uv', new Float32BufferAttribute( options.arrays.uv, 2 ) );

		}

	};

	ExtrudeGeometry.WorldUVGenerator = {

		generateTopUV: function ( geometry, vertices, indexA, indexB, indexC ) {

			var a_x = vertices[ indexA * 3 ];
			var a_y = vertices[ indexA * 3 + 1 ];
			var b_x = vertices[ indexB * 3 ];
			var b_y = vertices[ indexB * 3 + 1 ];
			var c_x = vertices[ indexC * 3 ];
			var c_y = vertices[ indexC * 3 + 1 ];

			return [
				new Vector2( a_x, a_y ),
				new Vector2( b_x, b_y ),
				new Vector2( c_x, c_y )
			];

		},

		generateSideWallUV: function ( geometry, vertices, indexA, indexB, indexC, indexD ) {

			var a_x = vertices[ indexA * 3 ];
			var a_y = vertices[ indexA * 3 + 1 ];
			var a_z = vertices[ indexA * 3 + 2 ];
			var b_x = vertices[ indexB * 3 ];
			var b_y = vertices[ indexB * 3 + 1 ];
			var b_z = vertices[ indexB * 3 + 2 ];
			var c_x = vertices[ indexC * 3 ];
			var c_y = vertices[ indexC * 3 + 1 ];
			var c_z = vertices[ indexC * 3 + 2 ];
			var d_x = vertices[ indexD * 3 ];
			var d_y = vertices[ indexD * 3 + 1 ];
			var d_z = vertices[ indexD * 3 + 2 ];

			if ( Math.abs( a_y - b_y ) < 0.01 ) {

				return [
					new Vector2( a_x, 1 - a_z ),
					new Vector2( b_x, 1 - b_z ),
					new Vector2( c_x, 1 - c_z ),
					new Vector2( d_x, 1 - d_z )
				];

			} else {

				return [
					new Vector2( a_y, 1 - a_z ),
					new Vector2( b_y, 1 - b_z ),
					new Vector2( c_y, 1 - c_z ),
					new Vector2( d_y, 1 - d_z )
				];

			}

		}
	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'ExtrudeGeometry', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

		QUnit.module.todo( 'ExtrudeBufferGeometry', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// STATIC STUFF
			QUnit.test( "WorldUVGenerator.generateTopUV", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "WorldUVGenerator.generateSideWallUV", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "getArrays", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "addShapeList", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "addShape", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author timothypratley / https://github.com/timothypratley
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// IcosahedronGeometry

	function IcosahedronGeometry( radius, detail ) {

		Geometry.call( this );

		this.type = 'IcosahedronGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

		this.fromBufferGeometry( new IcosahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();

	}

	IcosahedronGeometry.prototype = Object.create( Geometry.prototype );
	IcosahedronGeometry.prototype.constructor = IcosahedronGeometry;

	// IcosahedronBufferGeometry

	function IcosahedronBufferGeometry( radius, detail ) {

		var t = ( 1 + Math.sqrt( 5 ) ) / 2;

		var vertices = [
			- 1, t, 0, 	1, t, 0, 	- 1, - t, 0, 	1, - t, 0,
			 0, - 1, t, 	0, 1, t,	0, - 1, - t, 	0, 1, - t,
			 t, 0, - 1, 	t, 0, 1, 	- t, 0, - 1, 	- t, 0, 1
		];

		var indices = [
			 0, 11, 5, 	0, 5, 1, 	0, 1, 7, 	0, 7, 10, 	0, 10, 11,
			 1, 5, 9, 	5, 11, 4,	11, 10, 2,	10, 7, 6,	7, 1, 8,
			 3, 9, 4, 	3, 4, 2,	3, 2, 6,	3, 6, 8,	3, 8, 9,
			 4, 9, 5, 	2, 4, 11,	6, 2, 10,	8, 6, 7,	9, 8, 1
		];

		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

		this.type = 'IcosahedronBufferGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

	}

	IcosahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	IcosahedronBufferGeometry.prototype.constructor = IcosahedronBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'IcosahedronGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new IcosahedronGeometry(),
					new IcosahedronGeometry( parameters.radius ),
					new IcosahedronGeometry( parameters.radius, parameters.detail ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'IcosahedronBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new IcosahedronBufferGeometry(),
					new IcosahedronBufferGeometry( parameters.radius ),
					new IcosahedronBufferGeometry( parameters.radius, parameters.detail ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author astrodud / http://astrodud.isgreat.org/
	 * @author zz85 / https://github.com/zz85
	 * @author bhouston / http://clara.io
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// LatheGeometry

	function LatheGeometry( points, segments, phiStart, phiLength ) {

		Geometry.call( this );

		this.type = 'LatheGeometry';

		this.parameters = {
			points: points,
			segments: segments,
			phiStart: phiStart,
			phiLength: phiLength
		};

		this.fromBufferGeometry( new LatheBufferGeometry( points, segments, phiStart, phiLength ) );
		this.mergeVertices();

	}

	LatheGeometry.prototype = Object.create( Geometry.prototype );
	LatheGeometry.prototype.constructor = LatheGeometry;

	// LatheBufferGeometry

	function LatheBufferGeometry( points, segments, phiStart, phiLength ) {

		BufferGeometry.call( this );

		this.type = 'LatheBufferGeometry';

		this.parameters = {
			points: points,
			segments: segments,
			phiStart: phiStart,
			phiLength: phiLength
		};

		segments = Math.floor( segments ) || 12;
		phiStart = phiStart || 0;
		phiLength = phiLength || Math.PI * 2;

		// clamp phiLength so it's in range of [ 0, 2PI ]

		phiLength = _Math.clamp( phiLength, 0, Math.PI * 2 );


		// buffers

		var indices = [];
		var vertices = [];
		var uvs = [];

		// helper variables

		var base;
		var inverseSegments = 1.0 / segments;
		var vertex = new Vector3();
		var uv = new Vector2();
		var i, j;

		// generate vertices and uvs

		for ( i = 0; i <= segments; i ++ ) {

			var phi = phiStart + i * inverseSegments * phiLength;

			var sin = Math.sin( phi );
			var cos = Math.cos( phi );

			for ( j = 0; j <= ( points.length - 1 ); j ++ ) {

				// vertex

				vertex.x = points[ j ].x * sin;
				vertex.y = points[ j ].y;
				vertex.z = points[ j ].x * cos;

				vertices.push( vertex.x, vertex.y, vertex.z );

				// uv

				uv.x = i / segments;
				uv.y = j / ( points.length - 1 );

				uvs.push( uv.x, uv.y );


			}

		}

		// indices

		for ( i = 0; i < segments; i ++ ) {

			for ( j = 0; j < ( points.length - 1 ); j ++ ) {

				base = j + i * points.length;

				var a = base;
				var b = base + points.length;
				var c = base + points.length + 1;
				var d = base + 1;

				// faces

				indices.push( a, b, d );
				indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

		// generate normals

		this.computeVertexNormals();

		// if the geometry is closed, we need to average the normals along the seam.
		// because the corresponding vertices are identical (but still have different UVs).

		if ( phiLength === Math.PI * 2 ) {

			var normals = this.attributes.normal.array;
			var n1 = new Vector3();
			var n2 = new Vector3();
			var n = new Vector3();

			// this is the buffer offset for the last line of vertices

			base = segments * points.length * 3;

			for ( i = 0, j = 0; i < points.length; i ++, j += 3 ) {

				// select the normal of the vertex in the first line

				n1.x = normals[ j + 0 ];
				n1.y = normals[ j + 1 ];
				n1.z = normals[ j + 2 ];

				// select the normal of the vertex in the last line

				n2.x = normals[ base + j + 0 ];
				n2.y = normals[ base + j + 1 ];
				n2.z = normals[ base + j + 2 ];

				// average normals

				n.addVectors( n1, n2 ).normalize();

				// assign the new values to both normals

				normals[ j + 0 ] = normals[ base + j + 0 ] = n.x;
				normals[ j + 1 ] = normals[ base + j + 1 ] = n.y;
				normals[ j + 2 ] = normals[ base + j + 2 ] = n.z;

			}

		}

	}

	LatheBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	LatheBufferGeometry.prototype.constructor = LatheBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'LatheGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					points: [],
					segments: 0,
					phiStart: 0,
					phiLength: 0
				};

				geometries = [
					//				new LatheGeometry(), // Todo: error for undefined point
					new LatheGeometry( parameters.points )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'LatheBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					points: [],
					segments: 0,
					phiStart: 0,
					phiLength: 0
				};

				geometries = [
					//				new LatheBufferGeometry(), // Todo: error for undefined point
					new LatheBufferGeometry( parameters.points )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author timothypratley / https://github.com/timothypratley
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// OctahedronGeometry

	function OctahedronGeometry( radius, detail ) {

		Geometry.call( this );

		this.type = 'OctahedronGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

		this.fromBufferGeometry( new OctahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();

	}

	OctahedronGeometry.prototype = Object.create( Geometry.prototype );
	OctahedronGeometry.prototype.constructor = OctahedronGeometry;

	// OctahedronBufferGeometry

	function OctahedronBufferGeometry( radius, detail ) {

		var vertices = [
			1, 0, 0, 	- 1, 0, 0,	0, 1, 0,
			0, - 1, 0, 	0, 0, 1,	0, 0, - 1
		];

		var indices = [
			0, 2, 4,	0, 4, 3,	0, 3, 5,
			0, 5, 2,	1, 2, 5,	1, 5, 3,
			1, 3, 4,	1, 4, 2
		];

		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

		this.type = 'OctahedronBufferGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

	}

	OctahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	OctahedronBufferGeometry.prototype.constructor = OctahedronBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'OctahedronGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new OctahedronGeometry(),
					new OctahedronGeometry( parameters.radius ),
					new OctahedronGeometry( parameters.radius, parameters.detail ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'OctahedronBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new OctahedronBufferGeometry(),
					new OctahedronBufferGeometry( parameters.radius ),
					new OctahedronBufferGeometry( parameters.radius, parameters.detail ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author zz85 / https://github.com/zz85
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 * Parametric Surfaces Geometry
	 * based on the brilliant article by @prideout http://prideout.net/blog/?p=44
	 */

	// ParametricGeometry

	function ParametricGeometry( func, slices, stacks ) {

		Geometry.call( this );

		this.type = 'ParametricGeometry';

		this.parameters = {
			func: func,
			slices: slices,
			stacks: stacks
		};

		this.fromBufferGeometry( new ParametricBufferGeometry( func, slices, stacks ) );
		this.mergeVertices();

	}

	ParametricGeometry.prototype = Object.create( Geometry.prototype );
	ParametricGeometry.prototype.constructor = ParametricGeometry;

	// ParametricBufferGeometry

	function ParametricBufferGeometry( func, slices, stacks ) {

		BufferGeometry.call( this );

		this.type = 'ParametricBufferGeometry';

		this.parameters = {
			func: func,
			slices: slices,
			stacks: stacks
		};

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		var EPS = 0.00001;

		var normal = new Vector3();

		var p0 = new Vector3(), p1 = new Vector3();
		var pu = new Vector3(), pv = new Vector3();

		var i, j;

		// generate vertices, normals and uvs

		var sliceCount = slices + 1;

		for ( i = 0; i <= stacks; i ++ ) {

			var v = i / stacks;

			for ( j = 0; j <= slices; j ++ ) {

				var u = j / slices;

				// vertex

				p0 = func( u, v, p0 );
				vertices.push( p0.x, p0.y, p0.z );

				// normal

				// approximate tangent vectors via finite differences

				if ( u - EPS >= 0 ) {

					p1 = func( u - EPS, v, p1 );
					pu.subVectors( p0, p1 );

				} else {

					p1 = func( u + EPS, v, p1 );
					pu.subVectors( p1, p0 );

				}

				if ( v - EPS >= 0 ) {

					p1 = func( u, v - EPS, p1 );
					pv.subVectors( p0, p1 );

				} else {

					p1 = func( u, v + EPS, p1 );
					pv.subVectors( p1, p0 );

				}

				// cross product of tangent vectors returns surface normal

				normal.crossVectors( pu, pv ).normalize();
				normals.push( normal.x, normal.y, normal.z );

				// uv

				uvs.push( u, v );

			}

		}

		// generate indices

		for ( i = 0; i < stacks; i ++ ) {

			for ( j = 0; j < slices; j ++ ) {

				var a = i * sliceCount + j;
				var b = i * sliceCount + j + 1;
				var c = ( i + 1 ) * sliceCount + j + 1;
				var d = ( i + 1 ) * sliceCount + j;

				// faces one and two

				indices.push( a, b, d );
				indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

	}

	ParametricBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	ParametricBufferGeometry.prototype.constructor = ParametricBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'ParametricGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new ParametricGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'ParametricBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new ParametricBufferGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'PlaneGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					width: 10,
					height: 30,
					widthSegments: 3,
					heightSegments: 5
				};

				geometries = [
					new PlaneGeometry(),
					new PlaneGeometry( parameters.width ),
					new PlaneGeometry( parameters.width, parameters.height ),
					new PlaneGeometry( parameters.width, parameters.height, parameters.widthSegments ),
					new PlaneGeometry( parameters.width, parameters.height, parameters.widthSegments, parameters.heightSegments ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'PlaneBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					width: 10,
					height: 30,
					widthSegments: 3,
					heightSegments: 5
				};

				geometries = [
					new PlaneBufferGeometry(),
					new PlaneBufferGeometry( parameters.width ),
					new PlaneBufferGeometry( parameters.width, parameters.height ),
					new PlaneBufferGeometry( parameters.width, parameters.height, parameters.widthSegments ),
					new PlaneBufferGeometry( parameters.width, parameters.height, parameters.widthSegments, parameters.heightSegments ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'PolyhedronGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new PolyhedronGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'PolyhedronBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new PolyhedronBufferGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author Kaleb Murphy
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// RingGeometry

	function RingGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {

		Geometry.call( this );

		this.type = 'RingGeometry';

		this.parameters = {
			innerRadius: innerRadius,
			outerRadius: outerRadius,
			thetaSegments: thetaSegments,
			phiSegments: phiSegments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		this.fromBufferGeometry( new RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) );
		this.mergeVertices();

	}

	RingGeometry.prototype = Object.create( Geometry.prototype );
	RingGeometry.prototype.constructor = RingGeometry;

	// RingBufferGeometry

	function RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {

		BufferGeometry.call( this );

		this.type = 'RingBufferGeometry';

		this.parameters = {
			innerRadius: innerRadius,
			outerRadius: outerRadius,
			thetaSegments: thetaSegments,
			phiSegments: phiSegments,
			thetaStart: thetaStart,
			thetaLength: thetaLength
		};

		innerRadius = innerRadius || 0.5;
		outerRadius = outerRadius || 1;

		thetaStart = thetaStart !== undefined ? thetaStart : 0;
		thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;

		thetaSegments = thetaSegments !== undefined ? Math.max( 3, thetaSegments ) : 8;
		phiSegments = phiSegments !== undefined ? Math.max( 1, phiSegments ) : 1;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// some helper variables

		var segment;
		var radius = innerRadius;
		var radiusStep = ( ( outerRadius - innerRadius ) / phiSegments );
		var vertex = new Vector3();
		var uv = new Vector2();
		var j, i;

		// generate vertices, normals and uvs

		for ( j = 0; j <= phiSegments; j ++ ) {

			for ( i = 0; i <= thetaSegments; i ++ ) {

				// values are generate from the inside of the ring to the outside

				segment = thetaStart + i / thetaSegments * thetaLength;

				// vertex

				vertex.x = radius * Math.cos( segment );
				vertex.y = radius * Math.sin( segment );

				vertices.push( vertex.x, vertex.y, vertex.z );

				// normal

				normals.push( 0, 0, 1 );

				// uv

				uv.x = ( vertex.x / outerRadius + 1 ) / 2;
				uv.y = ( vertex.y / outerRadius + 1 ) / 2;

				uvs.push( uv.x, uv.y );

			}

			// increase the radius for next row of vertices

			radius += radiusStep;

		}

		// indices

		for ( j = 0; j < phiSegments; j ++ ) {

			var thetaSegmentLevel = j * ( thetaSegments + 1 );

			for ( i = 0; i < thetaSegments; i ++ ) {

				segment = i + thetaSegmentLevel;

				var a = segment;
				var b = segment + thetaSegments + 1;
				var c = segment + thetaSegments + 2;
				var d = segment + 1;

				// faces

				indices.push( a, b, d );
				indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

	}

	RingBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	RingBufferGeometry.prototype.constructor = RingBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'RingGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					innerRadius: 10,
					outerRadius: 60,
					thetaSegments: 12,
					phiSegments: 14,
					thetaStart: 0.1,
					thetaLength: 2.0
				};

				geometries = [
					new RingGeometry(),
					new RingGeometry( parameters.innerRadius ),
					new RingGeometry( parameters.innerRadius, parameters.outerRadius ),
					new RingGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments ),
					new RingGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments, parameters.phiSegments ),
					new RingGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments, parameters.phiSegments, parameters.thetaStart ),
					new RingGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments, parameters.phiSegments, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'RingBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					innerRadius: 10,
					outerRadius: 60,
					thetaSegments: 12,
					phiSegments: 14,
					thetaStart: 0.1,
					thetaLength: 2.0
				};

				geometries = [
					new RingBufferGeometry(),
					new RingBufferGeometry( parameters.innerRadius ),
					new RingBufferGeometry( parameters.innerRadius, parameters.outerRadius ),
					new RingBufferGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments ),
					new RingBufferGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments, parameters.phiSegments ),
					new RingBufferGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments, parameters.phiSegments, parameters.thetaStart ),
					new RingBufferGeometry( parameters.innerRadius, parameters.outerRadius, parameters.thetaSegments, parameters.phiSegments, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author jonobr1 / http://jonobr1.com
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// ShapeGeometry

	function ShapeGeometry( shapes, curveSegments ) {

		Geometry.call( this );

		this.type = 'ShapeGeometry';

		if ( typeof curveSegments === 'object' ) {

			console.warn( 'THREE.ShapeGeometry: Options parameter has been removed.' );

			curveSegments = curveSegments.curveSegments;

		}

		this.parameters = {
			shapes: shapes,
			curveSegments: curveSegments
		};

		this.fromBufferGeometry( new ShapeBufferGeometry( shapes, curveSegments ) );
		this.mergeVertices();

	}

	ShapeGeometry.prototype = Object.create( Geometry.prototype );
	ShapeGeometry.prototype.constructor = ShapeGeometry;

	// ShapeBufferGeometry

	function ShapeBufferGeometry( shapes, curveSegments ) {

		BufferGeometry.call( this );

		this.type = 'ShapeBufferGeometry';

		this.parameters = {
			shapes: shapes,
			curveSegments: curveSegments
		};

		curveSegments = curveSegments || 12;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// helper variables

		var groupStart = 0;
		var groupCount = 0;

		// allow single and array values for "shapes" parameter

		if ( Array.isArray( shapes ) === false ) {

			addShape( shapes );

		} else {

			for ( var i = 0; i < shapes.length; i ++ ) {

				addShape( shapes[ i ] );

				this.addGroup( groupStart, groupCount, i ); // enables MultiMaterial support

				groupStart += groupCount;
				groupCount = 0;

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );


		// helper functions

		function addShape( shape ) {

			var i, l, shapeHole;

			var indexOffset = vertices.length / 3;
			var points = shape.extractPoints( curveSegments );

			var shapeVertices = points.shape;
			var shapeHoles = points.holes;

			// check direction of vertices

			if ( ShapeUtils.isClockWise( shapeVertices ) === false ) {

				shapeVertices = shapeVertices.reverse();

				// also check if holes are in the opposite direction

				for ( i = 0, l = shapeHoles.length; i < l; i ++ ) {

					shapeHole = shapeHoles[ i ];

					if ( ShapeUtils.isClockWise( shapeHole ) === true ) {

						shapeHoles[ i ] = shapeHole.reverse();

					}

				}

			}

			var faces = ShapeUtils.triangulateShape( shapeVertices, shapeHoles );

			// join vertices of inner and outer paths to a single array

			for ( i = 0, l = shapeHoles.length; i < l; i ++ ) {

				shapeHole = shapeHoles[ i ];
				shapeVertices = shapeVertices.concat( shapeHole );

			}

			// vertices, normals, uvs

			for ( i = 0, l = shapeVertices.length; i < l; i ++ ) {

				var vertex = shapeVertices[ i ];

				vertices.push( vertex.x, vertex.y, 0 );
				normals.push( 0, 0, 1 );
				uvs.push( vertex.x, vertex.y ); // world uvs

			}

			// incides

			for ( i = 0, l = faces.length; i < l; i ++ ) {

				var face = faces[ i ];

				var a = face[ 0 ] + indexOffset;
				var b = face[ 1 ] + indexOffset;
				var c = face[ 2 ] + indexOffset;

				indices.push( a, b, c );
				groupCount += 3;

			}

		}

	}

	ShapeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	ShapeBufferGeometry.prototype.constructor = ShapeBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'ShapeGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new ShapeGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'ShapeBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new ShapeBufferGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'SphereGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					widthSegments: 20,
					heightSegments: 30,
					phiStart: 0.5,
					phiLength: 1.0,
					thetaStart: 0.4,
					thetaLength: 2.0,
				};

				geometries = [
					new SphereGeometry(),
					new SphereGeometry( parameters.radius ),
					new SphereGeometry( parameters.radius, parameters.widthSegments ),
					new SphereGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments ),
					new SphereGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart ),
					new SphereGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength ),
					new SphereGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart ),
					new SphereGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'SphereBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					widthSegments: 20,
					heightSegments: 30,
					phiStart: 0.5,
					phiLength: 1.0,
					thetaStart: 0.4,
					thetaLength: 2.0,
				};

				geometries = [
					new SphereBufferGeometry(),
					new SphereBufferGeometry( parameters.radius ),
					new SphereBufferGeometry( parameters.radius, parameters.widthSegments ),
					new SphereBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments ),
					new SphereBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart ),
					new SphereBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength ),
					new SphereBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart ),
					new SphereBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author timothypratley / https://github.com/timothypratley
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// TetrahedronGeometry

	function TetrahedronGeometry( radius, detail ) {

		Geometry.call( this );

		this.type = 'TetrahedronGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

		this.fromBufferGeometry( new TetrahedronBufferGeometry( radius, detail ) );
		this.mergeVertices();

	}

	TetrahedronGeometry.prototype = Object.create( Geometry.prototype );
	TetrahedronGeometry.prototype.constructor = TetrahedronGeometry;

	// TetrahedronBufferGeometry

	function TetrahedronBufferGeometry( radius, detail ) {

		var vertices = [
			1, 1, 1, 	- 1, - 1, 1, 	- 1, 1, - 1, 	1, - 1, - 1
		];

		var indices = [
			2, 1, 0, 	0, 3, 2,	1, 3, 0,	2, 3, 1
		];

		PolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );

		this.type = 'TetrahedronBufferGeometry';

		this.parameters = {
			radius: radius,
			detail: detail
		};

	}

	TetrahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );
	TetrahedronBufferGeometry.prototype.constructor = TetrahedronBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'TetrahedronGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new TetrahedronGeometry(),
					new TetrahedronGeometry( parameters.radius ),
					new TetrahedronGeometry( parameters.radius, parameters.widthSegments ),
					new TetrahedronGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments ),
					new TetrahedronGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart ),
					new TetrahedronGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength ),
					new TetrahedronGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart ),
					new TetrahedronGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'SphereBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					detail: undefined
				};

				geometries = [
					new TetrahedronBufferGeometry(),
					new TetrahedronBufferGeometry( parameters.radius ),
					new TetrahedronBufferGeometry( parameters.radius, parameters.widthSegments ),
					new TetrahedronBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments ),
					new TetrahedronBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart ),
					new TetrahedronBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength ),
					new TetrahedronBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart ),
					new TetrahedronBufferGeometry( parameters.radius, parameters.widthSegments, parameters.heightSegments, parameters.phiStart, parameters.phiLength, parameters.thetaStart, parameters.thetaLength ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author zz85 / http://www.lab4games.net/zz85/blog
	 * @author alteredq / http://alteredqualia.com/
	 *
	 * Text = 3D Text
	 *
	 * parameters = {
	 *  font: <THREE.Font>, // font
	 *
	 *  size: <float>, // size of the text
	 *  height: <float>, // thickness to extrude text
	 *  curveSegments: <int>, // number of points on the curves
	 *
	 *  bevelEnabled: <bool>, // turn on bevel
	 *  bevelThickness: <float>, // how deep into text bevel goes
	 *  bevelSize: <float> // how far from text outline is bevel
	 * }
	 */

	// TextGeometry

	function TextGeometry( text, parameters ) {

		Geometry.call( this );

		this.type = 'TextGeometry';

		this.parameters = {
			text: text,
			parameters: parameters
		};

		this.fromBufferGeometry( new TextBufferGeometry( text, parameters ) );
		this.mergeVertices();

	}

	TextGeometry.prototype = Object.create( Geometry.prototype );
	TextGeometry.prototype.constructor = TextGeometry;

	// TextBufferGeometry

	function TextBufferGeometry( text, parameters ) {

		parameters = parameters || {};

		var font = parameters.font;

		if ( ! ( font && font.isFont ) ) {

			console.error( 'THREE.TextGeometry: font parameter is not an instance of THREE.Font.' );
			return new Geometry();

		}

		var shapes = font.generateShapes( text, parameters.size, parameters.curveSegments );

		// translate parameters to ExtrudeGeometry API

		parameters.amount = parameters.height !== undefined ? parameters.height : 50;

		// defaults

		if ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;
		if ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;
		if ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;

		ExtrudeBufferGeometry.call( this, shapes, parameters );

		this.type = 'TextBufferGeometry';

	}

	TextBufferGeometry.prototype = Object.create( ExtrudeBufferGeometry.prototype );
	TextBufferGeometry.prototype.constructor = TextBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'TextGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				// TODO: we cannot load any font from Threejs package :S
				const parameters = {
					font: undefined
				};

				geometries = [
					new TextGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'TextBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new TextBufferGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author oosmoxiecode
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	// TorusGeometry

	function TorusGeometry( radius, tube, radialSegments, tubularSegments, arc ) {

		Geometry.call( this );

		this.type = 'TorusGeometry';

		this.parameters = {
			radius: radius,
			tube: tube,
			radialSegments: radialSegments,
			tubularSegments: tubularSegments,
			arc: arc
		};

		this.fromBufferGeometry( new TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) );
		this.mergeVertices();

	}

	TorusGeometry.prototype = Object.create( Geometry.prototype );
	TorusGeometry.prototype.constructor = TorusGeometry;

	// TorusBufferGeometry

	function TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) {

		BufferGeometry.call( this );

		this.type = 'TorusBufferGeometry';

		this.parameters = {
			radius: radius,
			tube: tube,
			radialSegments: radialSegments,
			tubularSegments: tubularSegments,
			arc: arc
		};

		radius = radius || 1;
		tube = tube || 0.4;
		radialSegments = Math.floor( radialSegments ) || 8;
		tubularSegments = Math.floor( tubularSegments ) || 6;
		arc = arc || Math.PI * 2;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// helper variables

		var center = new Vector3();
		var vertex = new Vector3();
		var normal = new Vector3();

		var j, i;

		// generate vertices, normals and uvs

		for ( j = 0; j <= radialSegments; j ++ ) {

			for ( i = 0; i <= tubularSegments; i ++ ) {

				var u = i / tubularSegments * arc;
				var v = j / radialSegments * Math.PI * 2;

				// vertex

				vertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );
				vertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );
				vertex.z = tube * Math.sin( v );

				vertices.push( vertex.x, vertex.y, vertex.z );

				// normal

				center.x = radius * Math.cos( u );
				center.y = radius * Math.sin( u );
				normal.subVectors( vertex, center ).normalize();

				normals.push( normal.x, normal.y, normal.z );

				// uv

				uvs.push( i / tubularSegments );
				uvs.push( j / radialSegments );

			}

		}

		// generate indices

		for ( j = 1; j <= radialSegments; j ++ ) {

			for ( i = 1; i <= tubularSegments; i ++ ) {

				// indices

				var a = ( tubularSegments + 1 ) * j + i - 1;
				var b = ( tubularSegments + 1 ) * ( j - 1 ) + i - 1;
				var c = ( tubularSegments + 1 ) * ( j - 1 ) + i;
				var d = ( tubularSegments + 1 ) * j + i;

				// faces

				indices.push( a, b, d );
				indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

	}

	TorusBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	TorusBufferGeometry.prototype.constructor = TorusBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'TorusGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					tube: 20,
					radialSegments: 30,
					tubularSegments: 10,
					arc: 2.0,
				};

				geometries = [
					new TorusGeometry(),
					new TorusGeometry( parameters.radius ),
					new TorusGeometry( parameters.radius, parameters.tube ),
					new TorusGeometry( parameters.radius, parameters.tube, parameters.radialSegments ),
					new TorusGeometry( parameters.radius, parameters.tube, parameters.radialSegments, parameters.tubularSegments ),
					new TorusGeometry( parameters.radius, parameters.tube, parameters.radialSegments, parameters.tubularSegments, parameters.arc ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'TorusBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					tube: 20,
					radialSegments: 30,
					tubularSegments: 10,
					arc: 2.0,
				};

				geometries = [
					new TorusBufferGeometry(),
					new TorusBufferGeometry( parameters.radius ),
					new TorusBufferGeometry( parameters.radius, parameters.tube ),
					new TorusBufferGeometry( parameters.radius, parameters.tube, parameters.radialSegments ),
					new TorusBufferGeometry( parameters.radius, parameters.tube, parameters.radialSegments, parameters.tubularSegments ),
					new TorusBufferGeometry( parameters.radius, parameters.tube, parameters.radialSegments, parameters.tubularSegments, parameters.arc ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author oosmoxiecode
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 * based on http://www.blackpawn.com/texts/pqtorus/
	 */

	// TorusKnotGeometry

	function TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q, heightScale ) {

		Geometry.call( this );

		this.type = 'TorusKnotGeometry';

		this.parameters = {
			radius: radius,
			tube: tube,
			tubularSegments: tubularSegments,
			radialSegments: radialSegments,
			p: p,
			q: q
		};

		if ( heightScale !== undefined ) console.warn( 'THREE.TorusKnotGeometry: heightScale has been deprecated. Use .scale( x, y, z ) instead.' );

		this.fromBufferGeometry( new TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) );
		this.mergeVertices();

	}

	TorusKnotGeometry.prototype = Object.create( Geometry.prototype );
	TorusKnotGeometry.prototype.constructor = TorusKnotGeometry;

	// TorusKnotBufferGeometry

	function TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) {

		BufferGeometry.call( this );

		this.type = 'TorusKnotBufferGeometry';

		this.parameters = {
			radius: radius,
			tube: tube,
			tubularSegments: tubularSegments,
			radialSegments: radialSegments,
			p: p,
			q: q
		};

		radius = radius || 1;
		tube = tube || 0.4;
		tubularSegments = Math.floor( tubularSegments ) || 64;
		radialSegments = Math.floor( radialSegments ) || 8;
		p = p || 2;
		q = q || 3;

		// buffers

		var indices = [];
		var vertices = [];
		var normals = [];
		var uvs = [];

		// helper variables

		var i, j;

		var vertex = new Vector3();
		var normal = new Vector3();

		var P1 = new Vector3();
		var P2 = new Vector3();

		var B = new Vector3();
		var T = new Vector3();
		var N = new Vector3();

		// generate vertices, normals and uvs

		for ( i = 0; i <= tubularSegments; ++ i ) {

			// the radian "u" is used to calculate the position on the torus curve of the current tubular segement

			var u = i / tubularSegments * p * Math.PI * 2;

			// now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.
			// these points are used to create a special "coordinate space", which is necessary to calculate the correct vertex positions

			calculatePositionOnCurve( u, p, q, radius, P1 );
			calculatePositionOnCurve( u + 0.01, p, q, radius, P2 );

			// calculate orthonormal basis

			T.subVectors( P2, P1 );
			N.addVectors( P2, P1 );
			B.crossVectors( T, N );
			N.crossVectors( B, T );

			// normalize B, N. T can be ignored, we don't use it

			B.normalize();
			N.normalize();

			for ( j = 0; j <= radialSegments; ++ j ) {

				// now calculate the vertices. they are nothing more than an extrusion of the torus curve.
				// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.

				var v = j / radialSegments * Math.PI * 2;
				var cx = - tube * Math.cos( v );
				var cy = tube * Math.sin( v );

				// now calculate the final vertex position.
				// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve

				vertex.x = P1.x + ( cx * N.x + cy * B.x );
				vertex.y = P1.y + ( cx * N.y + cy * B.y );
				vertex.z = P1.z + ( cx * N.z + cy * B.z );

				vertices.push( vertex.x, vertex.y, vertex.z );

				// normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)

				normal.subVectors( vertex, P1 ).normalize();

				normals.push( normal.x, normal.y, normal.z );

				// uv

				uvs.push( i / tubularSegments );
				uvs.push( j / radialSegments );

			}

		}

		// generate indices

		for ( j = 1; j <= tubularSegments; j ++ ) {

			for ( i = 1; i <= radialSegments; i ++ ) {

				// indices

				var a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );
				var b = ( radialSegments + 1 ) * j + ( i - 1 );
				var c = ( radialSegments + 1 ) * j + i;
				var d = ( radialSegments + 1 ) * ( j - 1 ) + i;

				// faces

				indices.push( a, b, d );
				indices.push( b, c, d );

			}

		}

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

		// this function calculates the current position on the torus curve

		function calculatePositionOnCurve( u, p, q, radius, position ) {

			var cu = Math.cos( u );
			var su = Math.sin( u );
			var quOverP = q / p * u;
			var cs = Math.cos( quOverP );

			position.x = radius * ( 2 + cs ) * 0.5 * cu;
			position.y = radius * ( 2 + cs ) * su * 0.5;
			position.z = radius * Math.sin( quOverP ) * 0.5;

		}

	}

	TorusKnotBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	TorusKnotBufferGeometry.prototype.constructor = TorusKnotBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'SphereGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					tube: 20,
					tubularSegments: 30,
					radialSegments: 10,
					p: 3,
					q: 2
				};

				geometries = [
					new TorusKnotGeometry(),
					new TorusKnotGeometry( parameters.radius ),
					new TorusKnotGeometry( parameters.radius, parameters.tube ),
					new TorusKnotGeometry( parameters.radius, parameters.tube, parameters.tubularSegments ),
					new TorusKnotGeometry( parameters.radius, parameters.tube, parameters.tubularSegments, parameters.radialSegments ),
					new TorusKnotGeometry( parameters.radius, parameters.tube, parameters.tubularSegments, parameters.radialSegments, parameters.p, parameters.q ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'TorusKnotBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					tube: 20,
					tubularSegments: 30,
					radialSegments: 10,
					p: 3,
					q: 2
				};

				geometries = [
					new TorusKnotBufferGeometry(),
					new TorusKnotBufferGeometry( parameters.radius ),
					new TorusKnotBufferGeometry( parameters.radius, parameters.tube ),
					new TorusKnotBufferGeometry( parameters.radius, parameters.tube, parameters.tubularSegments ),
					new TorusKnotBufferGeometry( parameters.radius, parameters.tube, parameters.tubularSegments, parameters.radialSegments ),
					new TorusKnotBufferGeometry( parameters.radius, parameters.tube, parameters.tubularSegments, parameters.radialSegments, parameters.p, parameters.q ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author oosmoxiecode / https://github.com/oosmoxiecode
	 * @author WestLangley / https://github.com/WestLangley
	 * @author zz85 / https://github.com/zz85
	 * @author miningold / https://github.com/miningold
	 * @author jonobr1 / https://github.com/jonobr1
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 */

	// TubeGeometry

	function TubeGeometry( path, tubularSegments, radius, radialSegments, closed, taper ) {

		Geometry.call( this );

		this.type = 'TubeGeometry';

		this.parameters = {
			path: path,
			tubularSegments: tubularSegments,
			radius: radius,
			radialSegments: radialSegments,
			closed: closed
		};

		if ( taper !== undefined ) console.warn( 'THREE.TubeGeometry: taper has been removed.' );

		var bufferGeometry = new TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed );

		// expose internals

		this.tangents = bufferGeometry.tangents;
		this.normals = bufferGeometry.normals;
		this.binormals = bufferGeometry.binormals;

		// create geometry

		this.fromBufferGeometry( bufferGeometry );
		this.mergeVertices();

	}

	TubeGeometry.prototype = Object.create( Geometry.prototype );
	TubeGeometry.prototype.constructor = TubeGeometry;

	// TubeBufferGeometry

	function TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed ) {

		BufferGeometry.call( this );

		this.type = 'TubeBufferGeometry';

		this.parameters = {
			path: path,
			tubularSegments: tubularSegments,
			radius: radius,
			radialSegments: radialSegments,
			closed: closed
		};

		tubularSegments = tubularSegments || 64;
		radius = radius || 1;
		radialSegments = radialSegments || 8;
		closed = closed || false;

		var frames = path.computeFrenetFrames( tubularSegments, closed );

		// expose internals

		this.tangents = frames.tangents;
		this.normals = frames.normals;
		this.binormals = frames.binormals;

		// helper variables

		var vertex = new Vector3();
		var normal = new Vector3();
		var uv = new Vector2();
		var P = new Vector3();

		var i, j;

		// buffer

		var vertices = [];
		var normals = [];
		var uvs = [];
		var indices = [];

		// create buffer data

		generateBufferData();

		// build geometry

		this.setIndex( indices );
		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
		this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );

		// functions

		function generateBufferData() {

			for ( i = 0; i < tubularSegments; i ++ ) {

				generateSegment( i );

			}

			// if the geometry is not closed, generate the last row of vertices and normals
			// at the regular position on the given path
			//
			// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)

			generateSegment( ( closed === false ) ? tubularSegments : 0 );

			// uvs are generated in a separate function.
			// this makes it easy compute correct values for closed geometries

			generateUVs();

			// finally create faces

			generateIndices();

		}

		function generateSegment( i ) {

			// we use getPointAt to sample evenly distributed points from the given path

			P = path.getPointAt( i / tubularSegments, P );

			// retrieve corresponding normal and binormal

			var N = frames.normals[ i ];
			var B = frames.binormals[ i ];

			// generate normals and vertices for the current segment

			for ( j = 0; j <= radialSegments; j ++ ) {

				var v = j / radialSegments * Math.PI * 2;

				var sin = Math.sin( v );
				var cos = - Math.cos( v );

				// normal

				normal.x = ( cos * N.x + sin * B.x );
				normal.y = ( cos * N.y + sin * B.y );
				normal.z = ( cos * N.z + sin * B.z );
				normal.normalize();

				normals.push( normal.x, normal.y, normal.z );

				// vertex

				vertex.x = P.x + radius * normal.x;
				vertex.y = P.y + radius * normal.y;
				vertex.z = P.z + radius * normal.z;

				vertices.push( vertex.x, vertex.y, vertex.z );

			}

		}

		function generateIndices() {

			for ( j = 1; j <= tubularSegments; j ++ ) {

				for ( i = 1; i <= radialSegments; i ++ ) {

					var a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );
					var b = ( radialSegments + 1 ) * j + ( i - 1 );
					var c = ( radialSegments + 1 ) * j + i;
					var d = ( radialSegments + 1 ) * ( j - 1 ) + i;

					// faces

					indices.push( a, b, d );
					indices.push( b, c, d );

				}

			}

		}

		function generateUVs() {

			for ( i = 0; i <= tubularSegments; i ++ ) {

				for ( j = 0; j <= radialSegments; j ++ ) {

					uv.x = i / tubularSegments;
					uv.y = j / radialSegments;

					uvs.push( uv.x, uv.y );

				}

			}

		}

	}

	TubeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
	TubeBufferGeometry.prototype.constructor = TubeBufferGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'TubeGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new TubeGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

		QUnit.module.todo( 'TubeBufferGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new TubeBufferGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	function WireframeGeometry( geometry ) {

		BufferGeometry.call( this );

		this.type = 'WireframeGeometry';

		// buffer

		var vertices = [];

		// helper variables

		var i, j, l, o, ol;
		var edge = [ 0, 0 ], edges = {}, e, edge1, edge2;
		var key, keys = [ 'a', 'b', 'c' ];
		var vertex;

		// different logic for Geometry and BufferGeometry

		if ( geometry && geometry.isGeometry ) {

			// create a data structure that contains all edges without duplicates

			var faces = geometry.faces;

			for ( i = 0, l = faces.length; i < l; i ++ ) {

				var face = faces[ i ];

				for ( j = 0; j < 3; j ++ ) {

					edge1 = face[ keys[ j ] ];
					edge2 = face[ keys[ ( j + 1 ) % 3 ] ];
					edge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates
					edge[ 1 ] = Math.max( edge1, edge2 );

					key = edge[ 0 ] + ',' + edge[ 1 ];

					if ( edges[ key ] === undefined ) {

						edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };

					}

				}

			}

			// generate vertices

			for ( key in edges ) {

				e = edges[ key ];

				vertex = geometry.vertices[ e.index1 ];
				vertices.push( vertex.x, vertex.y, vertex.z );

				vertex = geometry.vertices[ e.index2 ];
				vertices.push( vertex.x, vertex.y, vertex.z );

			}

		} else if ( geometry && geometry.isBufferGeometry ) {

			var position, indices, groups;
			var group, start, count;
			var index1, index2;

			vertex = new Vector3();

			if ( geometry.index !== null ) {

				// indexed BufferGeometry

				position = geometry.attributes.position;
				indices = geometry.index;
				groups = geometry.groups;

				if ( groups.length === 0 ) {

					groups = [ { start: 0, count: indices.count, materialIndex: 0 } ];

				}

				// create a data structure that contains all eges without duplicates

				for ( o = 0, ol = groups.length; o < ol; ++ o ) {

					group = groups[ o ];

					start = group.start;
					count = group.count;

					for ( i = start, l = ( start + count ); i < l; i += 3 ) {

						for ( j = 0; j < 3; j ++ ) {

							edge1 = indices.getX( i + j );
							edge2 = indices.getX( i + ( j + 1 ) % 3 );
							edge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates
							edge[ 1 ] = Math.max( edge1, edge2 );

							key = edge[ 0 ] + ',' + edge[ 1 ];

							if ( edges[ key ] === undefined ) {

								edges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };

							}

						}

					}

				}

				// generate vertices

				for ( key in edges ) {

					e = edges[ key ];

					vertex.fromBufferAttribute( position, e.index1 );
					vertices.push( vertex.x, vertex.y, vertex.z );

					vertex.fromBufferAttribute( position, e.index2 );
					vertices.push( vertex.x, vertex.y, vertex.z );

				}

			} else {

				// non-indexed BufferGeometry

				position = geometry.attributes.position;

				for ( i = 0, l = ( position.count / 3 ); i < l; i ++ ) {

					for ( j = 0; j < 3; j ++ ) {

						// three edges per triangle, an edge is represented as (index1, index2)
						// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)

						index1 = 3 * i + j;
						vertex.fromBufferAttribute( position, index1 );
						vertices.push( vertex.x, vertex.y, vertex.z );

						index2 = 3 * i + ( ( j + 1 ) % 3 );
						vertex.fromBufferAttribute( position, index2 );
						vertices.push( vertex.x, vertex.y, vertex.z );

					}

				}

			}

		}

		// build geometry

		this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );

	}

	WireframeGeometry.prototype = Object.create( BufferGeometry.prototype );
	WireframeGeometry.prototype.constructor = WireframeGeometry;

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Geometries', () => {

		QUnit.module.todo( 'WireframeGeometry', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {};

				geometries = [
					new WireframeGeometry()
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 * @author zz85 / http://github.com/zz85
	 * @author bhouston / http://clara.io
	 *
	 * Creates an arrow for visualizing directions
	 *
	 * Parameters:
	 *  dir - Vector3
	 *  origin - Vector3
	 *  length - Number
	 *  color - color in hex value
	 *  headLength - Number
	 *  headWidth - Number
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'ArrowHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "setDirection", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setLength", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setColor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author sroucheray / http://sroucheray.org/
	 * @author mrdoob / http://mrdoob.com/
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'AxesHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'Box3Helper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / http://github.com/Mugen87
	 */

	function BoxHelper( object, color ) {

		this.object = object;

		if ( color === undefined ) color = 0xffff00;

		var indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );
		var positions = new Float32Array( 8 * 3 );

		var geometry = new BufferGeometry();
		geometry.setIndex( new BufferAttribute( indices, 1 ) );
		geometry.addAttribute( 'position', new BufferAttribute( positions, 3 ) );

		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );

		this.matrixAutoUpdate = false;

		this.update();

	}

	BoxHelper.prototype = Object.create( LineSegments.prototype );
	BoxHelper.prototype.constructor = BoxHelper;

	BoxHelper.prototype.update = ( function () {

		var box = new Box3();

		return function update( object ) {

			if ( object !== undefined ) {

				console.warn( 'THREE.BoxHelper: .update() has no longer arguments.' );

			}

			if ( this.object !== undefined ) {

				box.setFromObject( this.object );

			}

			if ( box.isEmpty() ) return;

			var min = box.min;
			var max = box.max;

			/*
			  5____4
			1/___0/|
			| 6__|_7
			2/___3/

			0: max.x, max.y, max.z
			1: min.x, max.y, max.z
			2: min.x, min.y, max.z
			3: max.x, min.y, max.z
			4: max.x, max.y, min.z
			5: min.x, max.y, min.z
			6: min.x, min.y, min.z
			7: max.x, min.y, min.z
			*/

			var position = this.geometry.attributes.position;
			var array = position.array;

			array[ 0 ] = max.x; array[ 1 ] = max.y; array[ 2 ] = max.z;
			array[ 3 ] = min.x; array[ 4 ] = max.y; array[ 5 ] = max.z;
			array[ 6 ] = min.x; array[ 7 ] = min.y; array[ 8 ] = max.z;
			array[ 9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;
			array[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;
			array[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;
			array[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;
			array[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;

			position.needsUpdate = true;

			this.geometry.computeBoundingSphere();

		};

	} )();

	BoxHelper.prototype.setFromObject = function ( object ) {

		this.object = object;
		this.update();

		return this;

	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author Anonymous
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'BoxHelper', ( hooks ) => {

			var geometries = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					radius: 10,
					widthSegments: 20,
					heightSegments: 30,
					phiStart: 0.5,
					phiLength: 1.0,
					thetaStart: 0.4,
					thetaLength: 2.0,
				};

				// Test with a normal cube and a box helper
				var boxGeometry = new BoxGeometry( parameters.diameter );
				var box = new Mesh( boxGeometry );
				var boxHelper = new BoxHelper( box );

				// The same should happen with a comparable sphere
				var sphereGeometry = new SphereGeometry( parameters.diameter / 2 );
				var sphere = new Mesh( sphereGeometry );
				var sphereBoxHelper = new BoxHelper( sphere );

				// Note that unlike what I'd like to, these doesn't check the equivalency of the two generated geometries
				geometries = [ boxHelper.geometry, sphereBoxHelper.geometry ];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFromObject", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard geometry tests', ( assert ) => {

				runStdGeometryTests( assert, geometries );

			} );

		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 *	- shows frustum, line of sight and up of the camera
	 *	- suitable for fast updates
	 * 	- based on frustum visualization in lightgl.js shadowmap example
	 *		http://evanw.github.com/lightgl.js/tests/shadowmap.html
	 */

	function CameraHelper( camera ) {

		var geometry = new BufferGeometry();
		var material = new LineBasicMaterial( { color: 0xffffff, vertexColors: FaceColors } );

		var vertices = [];
		var colors = [];

		var pointMap = {};

		// colors

		var colorFrustum = new Color( 0xffaa00 );
		var colorCone = new Color( 0xff0000 );
		var colorUp = new Color( 0x00aaff );
		var colorTarget = new Color( 0xffffff );
		var colorCross = new Color( 0x333333 );

		// near

		addLine( 'n1', 'n2', colorFrustum );
		addLine( 'n2', 'n4', colorFrustum );
		addLine( 'n4', 'n3', colorFrustum );
		addLine( 'n3', 'n1', colorFrustum );

		// far

		addLine( 'f1', 'f2', colorFrustum );
		addLine( 'f2', 'f4', colorFrustum );
		addLine( 'f4', 'f3', colorFrustum );
		addLine( 'f3', 'f1', colorFrustum );

		// sides

		addLine( 'n1', 'f1', colorFrustum );
		addLine( 'n2', 'f2', colorFrustum );
		addLine( 'n3', 'f3', colorFrustum );
		addLine( 'n4', 'f4', colorFrustum );

		// cone

		addLine( 'p', 'n1', colorCone );
		addLine( 'p', 'n2', colorCone );
		addLine( 'p', 'n3', colorCone );
		addLine( 'p', 'n4', colorCone );

		// up

		addLine( 'u1', 'u2', colorUp );
		addLine( 'u2', 'u3', colorUp );
		addLine( 'u3', 'u1', colorUp );

		// target

		addLine( 'c', 't', colorTarget );
		addLine( 'p', 'c', colorCross );

		// cross

		addLine( 'cn1', 'cn2', colorCross );
		addLine( 'cn3', 'cn4', colorCross );

		addLine( 'cf1', 'cf2', colorCross );
		addLine( 'cf3', 'cf4', colorCross );

		function addLine( a, b, color ) {

			addPoint( a, color );
			addPoint( b, color );

		}

		function addPoint( id, color ) {

			vertices.push( 0, 0, 0 );
			colors.push( color.r, color.g, color.b );

			if ( pointMap[ id ] === undefined ) {

				pointMap[ id ] = [];

			}

			pointMap[ id ].push( ( vertices.length / 3 ) - 1 );

		}

		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

		LineSegments.call( this, geometry, material );

		this.camera = camera;
		if ( this.camera.updateProjectionMatrix ) this.camera.updateProjectionMatrix();

		this.matrix = camera.matrixWorld;
		this.matrixAutoUpdate = false;

		this.pointMap = pointMap;

		this.update();

	}

	CameraHelper.prototype = Object.create( LineSegments.prototype );
	CameraHelper.prototype.constructor = CameraHelper;

	CameraHelper.prototype.update = function () {

		var geometry, pointMap;

		var vector = new Vector3();
		var camera = new Camera();

		function setPoint( point, x, y, z ) {

			vector.set( x, y, z ).unproject( camera );

			var points = pointMap[ point ];

			if ( points !== undefined ) {

				var position = geometry.getAttribute( 'position' );

				for ( var i = 0, l = points.length; i < l; i ++ ) {

					position.setXYZ( points[ i ], vector.x, vector.y, vector.z );

				}

			}

		}

		return function update() {

			geometry = this.geometry;
			pointMap = this.pointMap;

			var w = 1, h = 1;

			// we need just camera projection matrix
			// world matrix must be identity

			camera.projectionMatrix.copy( this.camera.projectionMatrix );

			// center / target

			setPoint( 'c', 0, 0, - 1 );
			setPoint( 't', 0, 0, 1 );

			// near

			setPoint( 'n1', - w, - h, - 1 );
			setPoint( 'n2', w, - h, - 1 );
			setPoint( 'n3', - w, h, - 1 );
			setPoint( 'n4', w, h, - 1 );

			// far

			setPoint( 'f1', - w, - h, 1 );
			setPoint( 'f2', w, - h, 1 );
			setPoint( 'f3', - w, h, 1 );
			setPoint( 'f4', w, h, 1 );

			// up

			setPoint( 'u1', w * 0.7, h * 1.1, - 1 );
			setPoint( 'u2', - w * 0.7, h * 1.1, - 1 );
			setPoint( 'u3', 0, h * 2, - 1 );

			// cross

			setPoint( 'cf1', - w, 0, 1 );
			setPoint( 'cf2', w, 0, 1 );
			setPoint( 'cf3', 0, - h, 1 );
			setPoint( 'cf4', 0, h, 1 );

			setPoint( 'cn1', - w, 0, - 1 );
			setPoint( 'cn2', w, 0, - 1 );
			setPoint( 'cn3', 0, - h, - 1 );
			setPoint( 'cn4', 0, h, - 1 );

			geometry.getAttribute( 'position' ).needsUpdate = true;

		};

	}();

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'CameraHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'DirectionalLightHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */

	function FaceNormalsHelper( object, size, hex, linewidth ) {

		// FaceNormalsHelper only supports THREE.Geometry

		this.object = object;

		this.size = ( size !== undefined ) ? size : 1;

		var color = ( hex !== undefined ) ? hex : 0xffff00;

		var width = ( linewidth !== undefined ) ? linewidth : 1;

		//

		var nNormals = 0;

		var objGeometry = this.object.geometry;

		if ( objGeometry && objGeometry.isGeometry ) {

			nNormals = objGeometry.faces.length;

		} else {

			console.warn( 'THREE.FaceNormalsHelper: only THREE.Geometry is supported. Use THREE.VertexNormalsHelper, instead.' );

		}

		//

		var geometry = new BufferGeometry();

		var positions = new Float32BufferAttribute( nNormals * 2 * 3, 3 );

		geometry.addAttribute( 'position', positions );

		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, linewidth: width } ) );

		//

		this.matrixAutoUpdate = false;
		this.update();

	}

	FaceNormalsHelper.prototype = Object.create( LineSegments.prototype );
	FaceNormalsHelper.prototype.constructor = FaceNormalsHelper;

	FaceNormalsHelper.prototype.update = ( function () {

		var v1 = new Vector3();
		var v2 = new Vector3();
		var normalMatrix = new Matrix3();

		return function update() {

			this.object.updateMatrixWorld( true );

			normalMatrix.getNormalMatrix( this.object.matrixWorld );

			var matrixWorld = this.object.matrixWorld;

			var position = this.geometry.attributes.position;

			//

			var objGeometry = this.object.geometry;

			var vertices = objGeometry.vertices;

			var faces = objGeometry.faces;

			var idx = 0;

			for ( var i = 0, l = faces.length; i < l; i ++ ) {

				var face = faces[ i ];

				var normal = face.normal;

				v1.copy( vertices[ face.a ] )
					.add( vertices[ face.b ] )
					.add( vertices[ face.c ] )
					.divideScalar( 3 )
					.applyMatrix4( matrixWorld );

				v2.copy( normal ).applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );

				position.setXYZ( idx, v1.x, v1.y, v1.z );

				idx = idx + 1;

				position.setXYZ( idx, v2.x, v2.y, v2.z );

				idx = idx + 1;

			}

			position.needsUpdate = true;

		};

	}() );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'FaceNormalsHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'GridHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	function HemisphereLightHelper( light, size, color ) {

		Object3D.call( this );

		this.light = light;
		this.light.updateMatrixWorld();

		this.matrix = light.matrixWorld;
		this.matrixAutoUpdate = false;

		this.color = color;

		var geometry = new OctahedronBufferGeometry( size );
		geometry.rotateY( Math.PI * 0.5 );

		this.material = new MeshBasicMaterial( { wireframe: true, fog: false } );
		if ( this.color === undefined ) this.material.vertexColors = VertexColors;

		var position = geometry.getAttribute( 'position' );
		var colors = new Float32Array( position.count * 3 );

		geometry.addAttribute( 'color', new BufferAttribute( colors, 3 ) );

		this.add( new Mesh( geometry, this.material ) );

		this.update();

	}

	HemisphereLightHelper.prototype = Object.create( Object3D.prototype );
	HemisphereLightHelper.prototype.constructor = HemisphereLightHelper;

	HemisphereLightHelper.prototype.dispose = function () {

		this.children[ 0 ].geometry.dispose();
		this.children[ 0 ].material.dispose();

	};

	HemisphereLightHelper.prototype.update = function () {

		var vector = new Vector3();

		var color1 = new Color();
		var color2 = new Color();

		return function update() {

			var mesh = this.children[ 0 ];

			if ( this.color !== undefined ) {

				this.material.color.set( this.color );

			} else {

				var colors = mesh.geometry.getAttribute( 'color' );

				color1.copy( this.light.color );
				color2.copy( this.light.groundColor );

				for ( var i = 0, l = colors.count; i < l; i ++ ) {

					var color = ( i < ( l / 2 ) ) ? color1 : color2;

					colors.setXYZ( i, color.r, color.g, color.b );

				}

				colors.needsUpdate = true;

			}

			mesh.lookAt( vector.setFromMatrixPosition( this.light.matrixWorld ).negate() );

		};

	}();

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'HemisphereLightHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author WestLangley / http://github.com/WestLangley
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'PlaneHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'PointLightHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author Mugen87 / http://github.com/Mugen87
	 * @author Hectate / http://www.github.com/Hectate
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'PolarGridHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author abelnation / http://github.com/abelnation
	 * @author Mugen87 / http://github.com/Mugen87
	 * @author WestLangley / http://github.com/WestLangley
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'RectAreaLightHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author Sean Griffin / http://twitter.com/sgrif
	 * @author Michael Guerrero / http://realitymeltdown.com
	 * @author mrdoob / http://mrdoob.com/
	 * @author ikerr / http://verold.com
	 * @author Mugen87 / https://github.com/Mugen87
	 */

	function getBoneList( object ) {

		var boneList = [];

		if ( object && object.isBone ) {

			boneList.push( object );

		}

		for ( var i = 0; i < object.children.length; i ++ ) {

			boneList.push.apply( boneList, getBoneList( object.children[ i ] ) );

		}

		return boneList;

	}

	function SkeletonHelper( object ) {

		var bones = getBoneList( object );

		var geometry = new BufferGeometry();

		var vertices = [];
		var colors = [];

		var color1 = new Color( 0, 0, 1 );
		var color2 = new Color( 0, 1, 0 );

		for ( var i = 0; i < bones.length; i ++ ) {

			var bone = bones[ i ];

			if ( bone.parent && bone.parent.isBone ) {

				vertices.push( 0, 0, 0 );
				vertices.push( 0, 0, 0 );
				colors.push( color1.r, color1.g, color1.b );
				colors.push( color2.r, color2.g, color2.b );

			}

		}

		geometry.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
		geometry.addAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );

		var material = new LineBasicMaterial( { vertexColors: VertexColors, depthTest: false, depthWrite: false, transparent: true } );

		LineSegments.call( this, geometry, material );

		this.root = object;
		this.bones = bones;

		this.matrix = object.matrixWorld;
		this.matrixAutoUpdate = false;

	}

	SkeletonHelper.prototype = Object.create( LineSegments.prototype );
	SkeletonHelper.prototype.constructor = SkeletonHelper;

	SkeletonHelper.prototype.updateMatrixWorld = function () {

		var vector = new Vector3();

		var boneMatrix = new Matrix4();
		var matrixWorldInv = new Matrix4();

		return function updateMatrixWorld( force ) {

			var bones = this.bones;

			var geometry = this.geometry;
			var position = geometry.getAttribute( 'position' );

			matrixWorldInv.getInverse( this.root.matrixWorld );

			for ( var i = 0, j = 0; i < bones.length; i ++ ) {

				var bone = bones[ i ];

				if ( bone.parent && bone.parent.isBone ) {

					boneMatrix.multiplyMatrices( matrixWorldInv, bone.matrixWorld );
					vector.setFromMatrixPosition( boneMatrix );
					position.setXYZ( j, vector.x, vector.y, vector.z );

					boneMatrix.multiplyMatrices( matrixWorldInv, bone.parent.matrixWorld );
					vector.setFromMatrixPosition( boneMatrix );
					position.setXYZ( j + 1, vector.x, vector.y, vector.z );

					j += 2;

				}

			}

			geometry.getAttribute( 'position' ).needsUpdate = true;

			Object3D.prototype.updateMatrixWorld.call( this, force );

		};

	}();

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'SkeletonHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'SpotLightHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author WestLangley / http://github.com/WestLangley
	 */

	function VertexNormalsHelper( object, size, hex, linewidth ) {

		this.object = object;

		this.size = ( size !== undefined ) ? size : 1;

		var color = ( hex !== undefined ) ? hex : 0xff0000;

		var width = ( linewidth !== undefined ) ? linewidth : 1;

		//

		var nNormals = 0;

		var objGeometry = this.object.geometry;

		if ( objGeometry && objGeometry.isGeometry ) {

			nNormals = objGeometry.faces.length * 3;

		} else if ( objGeometry && objGeometry.isBufferGeometry ) {

			nNormals = objGeometry.attributes.normal.count;

		}

		//

		var geometry = new BufferGeometry();

		var positions = new Float32BufferAttribute( nNormals * 2 * 3, 3 );

		geometry.addAttribute( 'position', positions );

		LineSegments.call( this, geometry, new LineBasicMaterial( { color: color, linewidth: width } ) );

		//

		this.matrixAutoUpdate = false;

		this.update();

	}

	VertexNormalsHelper.prototype = Object.create( LineSegments.prototype );
	VertexNormalsHelper.prototype.constructor = VertexNormalsHelper;

	VertexNormalsHelper.prototype.update = ( function () {

		var v1 = new Vector3();
		var v2 = new Vector3();
		var normalMatrix = new Matrix3();

		return function update() {

			var keys = [ 'a', 'b', 'c' ];

			this.object.updateMatrixWorld( true );

			normalMatrix.getNormalMatrix( this.object.matrixWorld );

			var matrixWorld = this.object.matrixWorld;

			var position = this.geometry.attributes.position;

			//

			var objGeometry = this.object.geometry;

			if ( objGeometry && objGeometry.isGeometry ) {

				var vertices = objGeometry.vertices;

				var faces = objGeometry.faces;

				var idx = 0;

				for ( var i = 0, l = faces.length; i < l; i ++ ) {

					var face = faces[ i ];

					for ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {

						var vertex = vertices[ face[ keys[ j ] ] ];

						var normal = face.vertexNormals[ j ];

						v1.copy( vertex ).applyMatrix4( matrixWorld );

						v2.copy( normal ).applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );

						position.setXYZ( idx, v1.x, v1.y, v1.z );

						idx = idx + 1;

						position.setXYZ( idx, v2.x, v2.y, v2.z );

						idx = idx + 1;

					}

				}

			} else if ( objGeometry && objGeometry.isBufferGeometry ) {

				var objPos = objGeometry.attributes.position;

				var objNorm = objGeometry.attributes.normal;

				var idx = 0;

				// for simplicity, ignore index and drawcalls, and render every normal

				for ( var j = 0, jl = objPos.count; j < jl; j ++ ) {

					v1.set( objPos.getX( j ), objPos.getY( j ), objPos.getZ( j ) ).applyMatrix4( matrixWorld );

					v2.set( objNorm.getX( j ), objNorm.getY( j ), objNorm.getZ( j ) );

					v2.applyMatrix3( normalMatrix ).normalize().multiplyScalar( this.size ).add( v1 );

					position.setXYZ( idx, v1.x, v1.y, v1.z );

					idx = idx + 1;

					position.setXYZ( idx, v2.x, v2.y, v2.z );

					idx = idx + 1;

				}

			}

			position.needsUpdate = true;

		};

	}() );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Helpers', () => {

		QUnit.module.todo( 'VertexNormalsHelper', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Light( color, intensity ) {

		Object3D.call( this );

		this.type = 'Light';

		this.color = new Color( color );
		this.intensity = intensity !== undefined ? intensity : 1;

		this.receiveShadow = undefined;

	}

	Light.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Light,

		isLight: true,

		copy: function ( source ) {

			Object3D.prototype.copy.call( this, source );

			this.color.copy( source.color );
			this.intensity = source.intensity;

			return this;

		},

		toJSON: function ( meta ) {

			var data = Object3D.prototype.toJSON.call( this, meta );

			data.object.color = this.color.getHex();
			data.object.intensity = this.intensity;

			if ( this.groundColor !== undefined ) data.object.groundColor = this.groundColor.getHex();

			if ( this.distance !== undefined ) data.object.distance = this.distance;
			if ( this.angle !== undefined ) data.object.angle = this.angle;
			if ( this.decay !== undefined ) data.object.decay = this.decay;
			if ( this.penumbra !== undefined ) data.object.penumbra = this.penumbra;

			if ( this.shadow !== undefined ) data.object.shadow = this.shadow.toJSON();

			return data;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function AmbientLight( color, intensity ) {

		Light.call( this, color, intensity );

		this.type = 'AmbientLight';

		this.castShadow = undefined;

	}

	AmbientLight.prototype = Object.assign( Object.create( Light.prototype ), {

		constructor: AmbientLight,

		isAmbientLight: true

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'ArrowHelper', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					color: 0xaaaaaa,
					intensity: 0.5
				};

				lights = [
					new AmbientLight(),
					new AmbientLight( parameters.color ),
					new AmbientLight( parameters.color, parameters.intensity )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isAmbiantLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function LightShadow( camera ) {

		this.camera = camera;

		this.bias = 0;
		this.radius = 1;

		this.mapSize = new Vector2( 512, 512 );

		this.map = null;
		this.matrix = new Matrix4();

	}

	Object.assign( LightShadow.prototype, {

		copy: function ( source ) {

			this.camera = source.camera.clone();

			this.bias = source.bias;
			this.radius = source.radius;

			this.mapSize.copy( source.mapSize );

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		toJSON: function () {

			var object = {};

			if ( this.bias !== 0 ) object.bias = this.bias;
			if ( this.radius !== 1 ) object.radius = this.radius;
			if ( this.mapSize.x !== 512 || this.mapSize.y !== 512 ) object.mapSize = this.mapSize.toArray();

			object.camera = this.camera.toJSON( false ).object;
			delete object.camera.matrix;

			return object;

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function DirectionalLightShadow( ) {

		LightShadow.call( this, new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );

	}

	DirectionalLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

		constructor: DirectionalLightShadow

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function DirectionalLight$1( color, intensity ) {

		Light.call( this, color, intensity );

		this.type = 'DirectionalLight';

		this.position.copy( Object3D.DefaultUp );
		this.updateMatrix();

		this.target = new Object3D();

		this.shadow = new DirectionalLightShadow();

	}

	DirectionalLight$1.prototype = Object.assign( Object.create( Light.prototype ), {

		constructor: DirectionalLight$1,

		isDirectionalLight: true,

		copy: function ( source ) {

			Light.prototype.copy.call( this, source );

			this.target = source.target.clone();

			this.shadow = source.shadow.clone();

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'DirectionalLight', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					color: 0xaaaaaa,
					intensity: 0.8
				};

				lights = [
					new DirectionalLight$1(),
					new DirectionalLight$1( parameters.color ),
					new DirectionalLight$1( parameters.color, parameters.intensity )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isDirectionalLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'DirectionalLightShadow', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "clone/copy", ( assert ) => {

				var a = new DirectionalLightShadow();
				var b = new DirectionalLightShadow();
				var c;

				assert.notDeepEqual( a, b, "Newly instanced shadows are not equal" );

				c = a.clone();
				assert.smartEqual( a, c, "Shadows are identical after clone()" );

				c.mapSize.set( 1024, 1024 );
				assert.notDeepEqual( a, c, "Shadows are different again after change" );

				b.copy( a );
				assert.smartEqual( a, b, "Shadows are identical after copy()" );

				b.mapSize.set( 512, 512 );
				assert.notDeepEqual( a, b, "Shadows are different again after change" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				var light = new DirectionalLight();
				var shadow = new DirectionalLightShadow();

				shadow.bias = 10;
				shadow.radius = 5;
				shadow.mapSize.set( 1024, 1024 );
				light.shadow = shadow;

				var json = light.toJSON();
				var newLight = new ObjectLoader().parse( json );

				assert.smartEqual( newLight.shadow, light.shadow, "Reloaded shadow is identical to the original one" );

			} );

		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function HemisphereLight( skyColor, groundColor, intensity ) {

		Light.call( this, skyColor, intensity );

		this.type = 'HemisphereLight';

		this.castShadow = undefined;

		this.position.copy( Object3D.DefaultUp );
		this.updateMatrix();

		this.groundColor = new Color( groundColor );

	}

	HemisphereLight.prototype = Object.assign( Object.create( Light.prototype ), {

		constructor: HemisphereLight,

		isHemisphereLight: true,

		copy: function ( source ) {

			Light.prototype.copy.call( this, source );

			this.groundColor.copy( source.groundColor );

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'HemisphereLight', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					skyColor: 0x123456,
					groundColor: 0xabc012,
					intensity: 0.6
				};

				lights = [
					new HemisphereLight(),
					new HemisphereLight( parameters.skyColor ),
					new HemisphereLight( parameters.skyColor, parameters.groundColor ),
					new HemisphereLight( parameters.skyColor, parameters.groundColor, parameters.intensity ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isHemisphereLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'Light', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					color: 0xaaaaaa,
					intensity: 0.5
				};

				lights = [
					new Light(),
					new Light( parameters.color ),
					new Light( parameters.color, parameters.intensity )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'LightShadow', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "clone/copy", ( assert ) => {

				var a = new LightShadow( new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );
				var b = new LightShadow( new OrthographicCamera( - 3, 3, 3, - 3, 0.3, 300 ) );
				var c;

				assert.notDeepEqual( a, b, "Newly instanced shadows are not equal" );

				c = a.clone();
				assert.smartEqual( a, c, "Shadows are identical after clone()" );

				c.mapSize.set( 256, 256 );
				assert.notDeepEqual( a, c, "Shadows are different again after change" );

				b.copy( a );
				assert.smartEqual( a, b, "Shadows are identical after copy()" );

				b.mapSize.set( 512, 512 );
				assert.notDeepEqual( a, b, "Shadows are different again after change" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */


	function PointLight( color, intensity, distance, decay ) {

		Light.call( this, color, intensity );

		this.type = 'PointLight';

		Object.defineProperty( this, 'power', {
			get: function () {

				// intensity = power per solid angle.
				// ref: equation (15) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
				return this.intensity * 4 * Math.PI;

			},
			set: function ( power ) {

				// intensity = power per solid angle.
				// ref: equation (15) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
				this.intensity = power / ( 4 * Math.PI );

			}
		} );

		this.distance = ( distance !== undefined ) ? distance : 0;
		this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

		this.shadow = new LightShadow( new PerspectiveCamera( 90, 1, 0.5, 500 ) );

	}

	PointLight.prototype = Object.assign( Object.create( Light.prototype ), {

		constructor: PointLight,

		isPointLight: true,

		copy: function ( source ) {

			Light.prototype.copy.call( this, source );

			this.distance = source.distance;
			this.decay = source.decay;

			this.shadow = source.shadow.clone();

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'PointLight', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					color: 0xaaaaaa,
					intensity: 0.5,
					distance: 100,
					decay: 2
				};

				lights = [
					new PointLight(),
					new PointLight( parameters.color ),
					new PointLight( parameters.color, parameters.intensity ),
					new PointLight( parameters.color, parameters.intensity, parameters.distance ),
					new PointLight( parameters.color, parameters.intensity, parameters.distance, parameters.decay )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "power", ( assert ) => {

				var a = new PointLight( 0xaaaaaa );

				a.intensity = 100;
				assert.numEqual( a.power, 100 * Math.PI * 4, "Correct power for an intensity of 100" );

				a.intensity = 40;
				assert.numEqual( a.power, 40 * Math.PI * 4, "Correct power for an intensity of 40" );

				a.power = 100;
				assert.numEqual( a.intensity, 100 / ( 4 * Math.PI ), "Correct intensity for a power of 100" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isPointLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );


		} );

	} );

	/**
	 * @author abelnation / http://github.com/abelnation
	 */

	function RectAreaLight( color, intensity, width, height ) {

		Light.call( this, color, intensity );

		this.type = 'RectAreaLight';

		this.position.set( 0, 1, 0 );
		this.updateMatrix();

		this.width = ( width !== undefined ) ? width : 10;
		this.height = ( height !== undefined ) ? height : 10;

		// TODO (abelnation): distance/decay

		// TODO (abelnation): update method for RectAreaLight to update transform to lookat target

		// TODO (abelnation): shadows

	}

	// TODO (abelnation): RectAreaLight update when light shape is changed
	RectAreaLight.prototype = Object.assign( Object.create( Light.prototype ), {

		constructor: RectAreaLight,

		isRectAreaLight: true,

		copy: function ( source ) {

			Light.prototype.copy.call( this, source );

			this.width = source.width;
			this.height = source.height;

			return this;

		},

		toJSON: function ( meta ) {

			var data = Light.prototype.toJSON.call( this, meta );

			data.object.width = this.width;
			data.object.height = this.height;

			return data;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'RectAreaLight', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					color: 0xaaaaaa,
					intensity: 0.5,
					width: 100,
					height: 50
				};

				lights = [
					new RectAreaLight( parameters.color ),
					new RectAreaLight( parameters.color, parameters.intensity ),
					new RectAreaLight( parameters.color, parameters.intensity, parameters.width ),
					new RectAreaLight( parameters.color, parameters.intensity, parameters.width, parameters.height )
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isRectAreaLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function SpotLightShadow() {

		LightShadow.call( this, new PerspectiveCamera( 50, 1, 0.5, 500 ) );

	}

	SpotLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {

		constructor: SpotLightShadow,

		isSpotLightShadow: true,

		update: function ( light ) {

			var camera = this.camera;

			var fov = _Math.RAD2DEG * 2 * light.angle;
			var aspect = this.mapSize.width / this.mapSize.height;
			var far = light.distance || camera.far;

			if ( fov !== camera.fov || aspect !== camera.aspect || far !== camera.far ) {

				camera.fov = fov;
				camera.aspect = aspect;
				camera.far = far;
				camera.updateProjectionMatrix();

			}

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function SpotLight( color, intensity, distance, angle, penumbra, decay ) {

		Light.call( this, color, intensity );

		this.type = 'SpotLight';

		this.position.copy( Object3D.DefaultUp );
		this.updateMatrix();

		this.target = new Object3D();

		Object.defineProperty( this, 'power', {
			get: function () {

				// intensity = power per solid angle.
				// ref: equation (17) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
				return this.intensity * Math.PI;

			},
			set: function ( power ) {

				// intensity = power per solid angle.
				// ref: equation (17) from http://www.frostbite.com/wp-content/uploads/2014/11/course_notes_moving_frostbite_to_pbr.pdf
				this.intensity = power / Math.PI;

			}
		} );

		this.distance = ( distance !== undefined ) ? distance : 0;
		this.angle = ( angle !== undefined ) ? angle : Math.PI / 3;
		this.penumbra = ( penumbra !== undefined ) ? penumbra : 0;
		this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

		this.shadow = new SpotLightShadow();

	}

	SpotLight.prototype = Object.assign( Object.create( Light.prototype ), {

		constructor: SpotLight,

		isSpotLight: true,

		copy: function ( source ) {

			Light.prototype.copy.call( this, source );

			this.distance = source.distance;
			this.angle = source.angle;
			this.penumbra = source.penumbra;
			this.decay = source.decay;

			this.target = source.target.clone();

			this.shadow = source.shadow.clone();

			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'SpotLight', ( hooks ) => {

			var lights = undefined;
			hooks.beforeEach( function () {

				const parameters = {
					color: 0xaaaaaa,
					intensity: 0.5,
					distance: 100,
					angle: 0.8,
					penumbra: 8,
					decay: 2
				};

				lights = [
					new SpotLight( parameters.color ),
					new SpotLight( parameters.color, parameters.intensity ),
					new SpotLight( parameters.color, parameters.intensity, parameters.distance ),
					new SpotLight( parameters.color, parameters.intensity, parameters.distance, parameters.angle ),
					new SpotLight( parameters.color, parameters.intensity, parameters.distance, parameters.angle, parameters.penumbra ),
					new SpotLight( parameters.color, parameters.intensity, parameters.distance, parameters.angle, parameters.penumbra, parameters.decay ),
				];

			} );

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "power", ( assert ) => {

				var a = new SpotLight( 0xaaaaaa );

				a.intensity = 100;
				assert.numEqual( a.power, 100 * Math.PI, "Correct power for an intensity of 100" );

				a.intensity = 40;
				assert.numEqual( a.power, 40 * Math.PI, "Correct power for an intensity of 40" );

				a.power = 100;
				assert.numEqual( a.intensity, 100 / Math.PI, "Correct intensity for a power of 100" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSpotLight", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( 'Standard light tests', ( assert ) => {

				runStdLightTests( assert, lights );

			} );



		} );

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Sprite( material ) {

		Object3D.call( this );

		this.type = 'Sprite';

		this.material = ( material !== undefined ) ? material : new SpriteMaterial();

	}

	Sprite.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Sprite,

		isSprite: true,

		raycast: ( function () {

			var intersectPoint = new Vector3();
			var worldPosition = new Vector3();
			var worldScale = new Vector3();

			return function raycast( raycaster, intersects ) {

				worldPosition.setFromMatrixPosition( this.matrixWorld );
				raycaster.ray.closestPointToPoint( worldPosition, intersectPoint );

				worldScale.setFromMatrixScale( this.matrixWorld );
				var guessSizeSq = worldScale.x * worldScale.y / 4;

				if ( worldPosition.distanceToSquared( intersectPoint ) > guessSizeSq ) return;

				var distance = raycaster.ray.origin.distanceTo( intersectPoint );

				if ( distance < raycaster.near || distance > raycaster.far ) return;

				intersects.push( {

					distance: distance,
					point: intersectPoint.clone(),
					face: null,
					object: this

				} );

			};

		}() ),

		clone: function () {

			return new this.constructor( this.material ).copy( this );

		}

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Points( geometry, material ) {

		Object3D.call( this );

		this.type = 'Points';

		this.geometry = geometry !== undefined ? geometry : new BufferGeometry();
		this.material = material !== undefined ? material : new PointsMaterial( { color: Math.random() * 0xffffff } );

	}

	Points.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Points,

		isPoints: true,

		raycast: ( function () {

			var inverseMatrix = new Matrix4();
			var ray = new Ray();
			var sphere = new Sphere();

			return function raycast( raycaster, intersects ) {

				var object = this;
				var geometry = this.geometry;
				var matrixWorld = this.matrixWorld;
				var threshold = raycaster.params.Points.threshold;

				// Checking boundingSphere distance to ray

				if ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();

				sphere.copy( geometry.boundingSphere );
				sphere.applyMatrix4( matrixWorld );
				sphere.radius += threshold;

				if ( raycaster.ray.intersectsSphere( sphere ) === false ) return;

				//

				inverseMatrix.getInverse( matrixWorld );
				ray.copy( raycaster.ray ).applyMatrix4( inverseMatrix );

				var localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );
				var localThresholdSq = localThreshold * localThreshold;
				var position = new Vector3();

				function testPoint( point, index ) {

					var rayPointDistanceSq = ray.distanceSqToPoint( point );

					if ( rayPointDistanceSq < localThresholdSq ) {

						var intersectPoint = ray.closestPointToPoint( point );
						intersectPoint.applyMatrix4( matrixWorld );

						var distance = raycaster.ray.origin.distanceTo( intersectPoint );

						if ( distance < raycaster.near || distance > raycaster.far ) return;

						intersects.push( {

							distance: distance,
							distanceToRay: Math.sqrt( rayPointDistanceSq ),
							point: intersectPoint.clone(),
							index: index,
							face: null,
							object: object

						} );

					}

				}

				if ( geometry.isBufferGeometry ) {

					var index = geometry.index;
					var attributes = geometry.attributes;
					var positions = attributes.position.array;

					if ( index !== null ) {

						var indices = index.array;

						for ( var i = 0, il = indices.length; i < il; i ++ ) {

							var a = indices[ i ];

							position.fromArray( positions, a * 3 );

							testPoint( position, a );

						}

					} else {

						for ( var i = 0, l = positions.length / 3; i < l; i ++ ) {

							position.fromArray( positions, i * 3 );

							testPoint( position, i );

						}

					}

				} else {

					var vertices = geometry.vertices;

					for ( var i = 0, l = vertices.length; i < l; i ++ ) {

						testPoint( vertices[ i ], i );

					}

				}

			};

		}() ),

		clone: function () {

			return new this.constructor( this.geometry, this.material ).copy( this );

		}

	} );

	/**
	 * @author mgreter / http://github.com/mgreter
	 */

	function LineLoop( geometry, material ) {

		Line.call( this, geometry, material );

		this.type = 'LineLoop';

	}

	LineLoop.prototype = Object.assign( Object.create( Line.prototype ), {

		constructor: LineLoop,

		isLineLoop: true,

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author mrdoob / http://mrdoob.com/
	 */

	function LOD() {

		Object3D.call( this );

		this.type = 'LOD';

		Object.defineProperties( this, {
			levels: {
				enumerable: true,
				value: []
			}
		} );

	}

	LOD.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: LOD,

		copy: function ( source ) {

			Object3D.prototype.copy.call( this, source, false );

			var levels = source.levels;

			for ( var i = 0, l = levels.length; i < l; i ++ ) {

				var level = levels[ i ];

				this.addLevel( level.object.clone(), level.distance );

			}

			return this;

		},

		addLevel: function ( object, distance ) {

			if ( distance === undefined ) distance = 0;

			distance = Math.abs( distance );

			var levels = this.levels;

			for ( var l = 0; l < levels.length; l ++ ) {

				if ( distance < levels[ l ].distance ) {

					break;

				}

			}

			levels.splice( l, 0, { distance: distance, object: object } );

			this.add( object );

		},

		getObjectForDistance: function ( distance ) {

			var levels = this.levels;

			for ( var i = 1, l = levels.length; i < l; i ++ ) {

				if ( distance < levels[ i ].distance ) {

					break;

				}

			}

			return levels[ i - 1 ].object;

		},

		raycast: ( function () {

			var matrixPosition = new Vector3();

			return function raycast( raycaster, intersects ) {

				matrixPosition.setFromMatrixPosition( this.matrixWorld );

				var distance = raycaster.ray.origin.distanceTo( matrixPosition );

				this.getObjectForDistance( distance ).raycast( raycaster, intersects );

			};

		}() ),

		update: function () {

			var v1 = new Vector3();
			var v2 = new Vector3();

			return function update( camera ) {

				var levels = this.levels;

				if ( levels.length > 1 ) {

					v1.setFromMatrixPosition( camera.matrixWorld );
					v2.setFromMatrixPosition( this.matrixWorld );

					var distance = v1.distanceTo( v2 );

					levels[ 0 ].object.visible = true;

					for ( var i = 1, l = levels.length; i < l; i ++ ) {

						if ( distance >= levels[ i ].distance ) {

							levels[ i - 1 ].object.visible = false;
							levels[ i ].object.visible = true;

						} else {

							break;

						}

					}

					for ( ; i < l; i ++ ) {

						levels[ i ].object.visible = false;

					}

				}

			};

		}(),

		toJSON: function ( meta ) {

			var data = Object3D.prototype.toJSON.call( this, meta );

			data.object.levels = [];

			var levels = this.levels;

			for ( var i = 0, l = levels.length; i < l; i ++ ) {

				var level = levels[ i ];

				data.object.levels.push( {
					object: level.object.uuid,
					distance: level.distance
				} );

			}

			return data;

		}

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author michael guerrero / http://realitymeltdown.com
	 * @author ikerr / http://verold.com
	 */

	function Skeleton( bones, boneInverses ) {

		// copy the bone array

		bones = bones || [];

		this.bones = bones.slice( 0 );
		this.boneMatrices = new Float32Array( this.bones.length * 16 );

		// use the supplied bone inverses or calculate the inverses

		if ( boneInverses === undefined ) {

			this.calculateInverses();

		} else {

			if ( this.bones.length === boneInverses.length ) {

				this.boneInverses = boneInverses.slice( 0 );

			} else {

				console.warn( 'THREE.Skeleton boneInverses is the wrong length.' );

				this.boneInverses = [];

				for ( var i = 0, il = this.bones.length; i < il; i ++ ) {

					this.boneInverses.push( new Matrix4() );

				}

			}

		}

	}

	Object.assign( Skeleton.prototype, {

		calculateInverses: function () {

			this.boneInverses = [];

			for ( var i = 0, il = this.bones.length; i < il; i ++ ) {

				var inverse = new Matrix4();

				if ( this.bones[ i ] ) {

					inverse.getInverse( this.bones[ i ].matrixWorld );

				}

				this.boneInverses.push( inverse );

			}

		},

		pose: function () {

			var bone, i, il;

			// recover the bind-time world matrices

			for ( i = 0, il = this.bones.length; i < il; i ++ ) {

				bone = this.bones[ i ];

				if ( bone ) {

					bone.matrixWorld.getInverse( this.boneInverses[ i ] );

				}

			}

			// compute the local matrices, positions, rotations and scales

			for ( i = 0, il = this.bones.length; i < il; i ++ ) {

				bone = this.bones[ i ];

				if ( bone ) {

					if ( bone.parent && bone.parent.isBone ) {

						bone.matrix.getInverse( bone.parent.matrixWorld );
						bone.matrix.multiply( bone.matrixWorld );

					} else {

						bone.matrix.copy( bone.matrixWorld );

					}

					bone.matrix.decompose( bone.position, bone.quaternion, bone.scale );

				}

			}

		},

		update: ( function () {

			var offsetMatrix = new Matrix4();
			var identityMatrix = new Matrix4();

			return function update() {

				var bones = this.bones;
				var boneInverses = this.boneInverses;
				var boneMatrices = this.boneMatrices;
				var boneTexture = this.boneTexture;

				// flatten bone matrices to array

				for ( var i = 0, il = bones.length; i < il; i ++ ) {

					// compute the offset between the current and the original transform

					var matrix = bones[ i ] ? bones[ i ].matrixWorld : identityMatrix;

					offsetMatrix.multiplyMatrices( matrix, boneInverses[ i ] );
					offsetMatrix.toArray( boneMatrices, i * 16 );

				}

				if ( boneTexture !== undefined ) {

					boneTexture.needsUpdate = true;

				}

			};

		} )(),

		clone: function () {

			return new Skeleton( this.bones, this.boneInverses );

		}

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author ikerr / http://verold.com
	 */

	function Bone() {

		Object3D.call( this );

		this.type = 'Bone';

	}

	Bone.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: Bone,

		isBone: true

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 * @author ikerr / http://verold.com
	 */

	function SkinnedMesh( geometry, material ) {

		Mesh.call( this, geometry, material );

		this.type = 'SkinnedMesh';

		this.bindMode = 'attached';
		this.bindMatrix = new Matrix4();
		this.bindMatrixInverse = new Matrix4();

		var bones = this.initBones();
		var skeleton = new Skeleton( bones );

		this.bind( skeleton, this.matrixWorld );

		this.normalizeSkinWeights();

	}

	SkinnedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {

		constructor: SkinnedMesh,

		isSkinnedMesh: true,

		initBones: function () {

			var bones = [], bone, gbone;
			var i, il;

			if ( this.geometry && this.geometry.bones !== undefined ) {

				// first, create array of 'Bone' objects from geometry data

				for ( i = 0, il = this.geometry.bones.length; i < il; i ++ ) {

					gbone = this.geometry.bones[ i ];

					// create new 'Bone' object

					bone = new Bone();
					bones.push( bone );

					// apply values

					bone.name = gbone.name;
					bone.position.fromArray( gbone.pos );
					bone.quaternion.fromArray( gbone.rotq );
					if ( gbone.scl !== undefined ) bone.scale.fromArray( gbone.scl );

				}

				// second, create bone hierarchy

				for ( i = 0, il = this.geometry.bones.length; i < il; i ++ ) {

					gbone = this.geometry.bones[ i ];

					if ( ( gbone.parent !== - 1 ) && ( gbone.parent !== null ) && ( bones[ gbone.parent ] !== undefined ) ) {

						// subsequent bones in the hierarchy

						bones[ gbone.parent ].add( bones[ i ] );

					} else {

						// topmost bone, immediate child of the skinned mesh

						this.add( bones[ i ] );

					}

				}

			}

			// now the bones are part of the scene graph and children of the skinned mesh.
			// let's update the corresponding matrices

			this.updateMatrixWorld( true );

			return bones;

		},

		bind: function ( skeleton, bindMatrix ) {

			this.skeleton = skeleton;

			if ( bindMatrix === undefined ) {

				this.updateMatrixWorld( true );

				this.skeleton.calculateInverses();

				bindMatrix = this.matrixWorld;

			}

			this.bindMatrix.copy( bindMatrix );
			this.bindMatrixInverse.getInverse( bindMatrix );

		},

		pose: function () {

			this.skeleton.pose();

		},

		normalizeSkinWeights: function () {

			var scale, i;

			if ( this.geometry && this.geometry.isGeometry ) {

				for ( i = 0; i < this.geometry.skinWeights.length; i ++ ) {

					var sw = this.geometry.skinWeights[ i ];

					scale = 1.0 / sw.manhattanLength();

					if ( scale !== Infinity ) {

						sw.multiplyScalar( scale );

					} else {

						sw.set( 1, 0, 0, 0 ); // do something reasonable

					}

				}

			} else if ( this.geometry && this.geometry.isBufferGeometry ) {

				var vec = new Vector4();

				var skinWeight = this.geometry.attributes.skinWeight;

				for ( i = 0; i < skinWeight.count; i ++ ) {

					vec.x = skinWeight.getX( i );
					vec.y = skinWeight.getY( i );
					vec.z = skinWeight.getZ( i );
					vec.w = skinWeight.getW( i );

					scale = 1.0 / vec.manhattanLength();

					if ( scale !== Infinity ) {

						vec.multiplyScalar( scale );

					} else {

						vec.set( 1, 0, 0, 0 ); // do something reasonable

					}

					skinWeight.setXYZW( i, vec.x, vec.y, vec.z, vec.w );

				}

			}

		},

		updateMatrixWorld: function ( force ) {

			Mesh.prototype.updateMatrixWorld.call( this, force );

			if ( this.bindMode === 'attached' ) {

				this.bindMatrixInverse.getInverse( this.matrixWorld );

			} else if ( this.bindMode === 'detached' ) {

				this.bindMatrixInverse.getInverse( this.bindMatrix );

			} else {

				console.warn( 'THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode );

			}

		},

		clone: function () {

			return new this.constructor( this.geometry, this.material ).copy( this );

		}

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function Fog( color, near, far ) {

		this.name = '';

		this.color = new Color( color );

		this.near = ( near !== undefined ) ? near : 1;
		this.far = ( far !== undefined ) ? far : 1000;

	}

	Fog.prototype.isFog = true;

	Fog.prototype.clone = function () {

		return new Fog( this.color.getHex(), this.near, this.far );

	};

	Fog.prototype.toJSON = function ( /* meta */ ) {

		return {
			type: 'Fog',
			color: this.color.getHex(),
			near: this.near,
			far: this.far
		};

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function FogExp2( color, density ) {

		this.name = '';

		this.color = new Color( color );
		this.density = ( density !== undefined ) ? density : 0.00025;

	}

	FogExp2.prototype.isFogExp2 = true;

	FogExp2.prototype.clone = function () {

		return new FogExp2( this.color.getHex(), this.density );

	};

	FogExp2.prototype.toJSON = function ( /* meta */ ) {

		return {
			type: 'FogExp2',
			color: this.color.getHex(),
			density: this.density
		};

	};

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function BufferGeometryLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( BufferGeometryLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {

				onLoad( scope.parse( JSON.parse( text ) ) );

			}, onProgress, onError );

		},

		parse: function ( json ) {

			var geometry = new BufferGeometry();

			var index = json.data.index;

			if ( index !== undefined ) {

				var typedArray = new TYPED_ARRAYS[ index.type ]( index.array );
				geometry.setIndex( new BufferAttribute( typedArray, 1 ) );

			}

			var attributes = json.data.attributes;

			for ( var key in attributes ) {

				var attribute = attributes[ key ];
				var typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );

				geometry.addAttribute( key, new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized ) );

			}

			var groups = json.data.groups || json.data.drawcalls || json.data.offsets;

			if ( groups !== undefined ) {

				for ( var i = 0, n = groups.length; i !== n; ++ i ) {

					var group = groups[ i ];

					geometry.addGroup( group.start, group.count, group.materialIndex );

				}

			}

			var boundingSphere = json.data.boundingSphere;

			if ( boundingSphere !== undefined ) {

				var center = new Vector3();

				if ( boundingSphere.center !== undefined ) {

					center.fromArray( boundingSphere.center );

				}

				geometry.boundingSphere = new Sphere( center, boundingSphere.radius );

			}

			return geometry;

		}

	} );

	var TYPED_ARRAYS = {
		Int8Array: Int8Array,
		Uint8Array: Uint8Array,
		// Workaround for IE11 pre KB2929437. See #11440
		Uint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,
		Int16Array: Int16Array,
		Uint16Array: Uint16Array,
		Int32Array: Int32Array,
		Uint32Array: Uint32Array,
		Float32Array: Float32Array,
		Float64Array: Float64Array
	};



	var Geometries = Object.freeze({
		WireframeGeometry: WireframeGeometry,
		ParametricGeometry: ParametricGeometry,
		ParametricBufferGeometry: ParametricBufferGeometry,
		TetrahedronGeometry: TetrahedronGeometry,
		TetrahedronBufferGeometry: TetrahedronBufferGeometry,
		OctahedronGeometry: OctahedronGeometry,
		OctahedronBufferGeometry: OctahedronBufferGeometry,
		IcosahedronGeometry: IcosahedronGeometry,
		IcosahedronBufferGeometry: IcosahedronBufferGeometry,
		DodecahedronGeometry: DodecahedronGeometry,
		DodecahedronBufferGeometry: DodecahedronBufferGeometry,
		PolyhedronGeometry: PolyhedronGeometry,
		PolyhedronBufferGeometry: PolyhedronBufferGeometry,
		TubeGeometry: TubeGeometry,
		TubeBufferGeometry: TubeBufferGeometry,
		TorusKnotGeometry: TorusKnotGeometry,
		TorusKnotBufferGeometry: TorusKnotBufferGeometry,
		TorusGeometry: TorusGeometry,
		TorusBufferGeometry: TorusBufferGeometry,
		TextGeometry: TextGeometry,
		TextBufferGeometry: TextBufferGeometry,
		SphereGeometry: SphereGeometry,
		SphereBufferGeometry: SphereBufferGeometry,
		RingGeometry: RingGeometry,
		RingBufferGeometry: RingBufferGeometry,
		PlaneGeometry: PlaneGeometry,
		PlaneBufferGeometry: PlaneBufferGeometry,
		LatheGeometry: LatheGeometry,
		LatheBufferGeometry: LatheBufferGeometry,
		ShapeGeometry: ShapeGeometry,
		ShapeBufferGeometry: ShapeBufferGeometry,
		ExtrudeGeometry: ExtrudeGeometry,
		ExtrudeBufferGeometry: ExtrudeBufferGeometry,
		EdgesGeometry: EdgesGeometry,
		ConeGeometry: ConeGeometry,
		ConeBufferGeometry: ConeBufferGeometry,
		CylinderGeometry: CylinderGeometry,
		CylinderBufferGeometry: CylinderBufferGeometry,
		CircleGeometry: CircleGeometry,
		CircleBufferGeometry: CircleBufferGeometry,
		BoxGeometry: BoxGeometry,
		BoxBufferGeometry: BoxBufferGeometry
	});

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function ObjectLoader$1( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;
		this.texturePath = '';

	}

	Object.assign( ObjectLoader$1.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			if ( this.texturePath === '' ) {

				this.texturePath = url.substring( 0, url.lastIndexOf( '/' ) + 1 );

			}

			var scope = this;

			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {

				var json = null;

				try {

					json = JSON.parse( text );

				} catch ( error ) {

					if ( onError !== undefined ) onError( error );

					console.error( 'THREE:ObjectLoader: Can\'t parse ' + url + '.', error.message );

					return;

				}

				var metadata = json.metadata;

				if ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {

					console.error( 'THREE.ObjectLoader: Can\'t load ' + url + '. Use THREE.JSONLoader instead.' );
					return;

				}

				scope.parse( json, onLoad );

			}, onProgress, onError );

		},

		setTexturePath: function ( value ) {

			this.texturePath = value;

		},

		setCrossOrigin: function ( value ) {

			this.crossOrigin = value;

		},

		parse: function ( json, onLoad ) {

			var geometries = this.parseGeometries( json.geometries );

			var images = this.parseImages( json.images, function () {

				if ( onLoad !== undefined ) onLoad( object );

			} );

			var textures = this.parseTextures( json.textures, images );
			var materials = this.parseMaterials( json.materials, textures );

			var object = this.parseObject( json.object, geometries, materials );

			if ( json.animations ) {

				object.animations = this.parseAnimations( json.animations );

			}

			if ( json.images === undefined || json.images.length === 0 ) {

				if ( onLoad !== undefined ) onLoad( object );

			}

			return object;

		},

		parseGeometries: function ( json ) {

			var geometries = {};

			if ( json !== undefined ) {

				var geometryLoader = new JSONLoader();
				var bufferGeometryLoader = new BufferGeometryLoader();

				for ( var i = 0, l = json.length; i < l; i ++ ) {

					var geometry;
					var data = json[ i ];

					switch ( data.type ) {

						case 'PlaneGeometry':
						case 'PlaneBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.width,
								data.height,
								data.widthSegments,
								data.heightSegments
							);

							break;

						case 'BoxGeometry':
						case 'BoxBufferGeometry':
						case 'CubeGeometry': // backwards compatible

							geometry = new Geometries[ data.type ](
								data.width,
								data.height,
								data.depth,
								data.widthSegments,
								data.heightSegments,
								data.depthSegments
							);

							break;

						case 'CircleGeometry':
						case 'CircleBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radius,
								data.segments,
								data.thetaStart,
								data.thetaLength
							);

							break;

						case 'CylinderGeometry':
						case 'CylinderBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radiusTop,
								data.radiusBottom,
								data.height,
								data.radialSegments,
								data.heightSegments,
								data.openEnded,
								data.thetaStart,
								data.thetaLength
							);

							break;

						case 'ConeGeometry':
						case 'ConeBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radius,
								data.height,
								data.radialSegments,
								data.heightSegments,
								data.openEnded,
								data.thetaStart,
								data.thetaLength
							);

							break;

						case 'SphereGeometry':
						case 'SphereBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radius,
								data.widthSegments,
								data.heightSegments,
								data.phiStart,
								data.phiLength,
								data.thetaStart,
								data.thetaLength
							);

							break;

						case 'DodecahedronGeometry':
						case 'DodecahedronBufferGeometry':
						case 'IcosahedronGeometry':
						case 'IcosahedronBufferGeometry':
						case 'OctahedronGeometry':
						case 'OctahedronBufferGeometry':
						case 'TetrahedronGeometry':
						case 'TetrahedronBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radius,
								data.detail
							);

							break;

						case 'RingGeometry':
						case 'RingBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.innerRadius,
								data.outerRadius,
								data.thetaSegments,
								data.phiSegments,
								data.thetaStart,
								data.thetaLength
							);

							break;

						case 'TorusGeometry':
						case 'TorusBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radius,
								data.tube,
								data.radialSegments,
								data.tubularSegments,
								data.arc
							);

							break;

						case 'TorusKnotGeometry':
						case 'TorusKnotBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.radius,
								data.tube,
								data.tubularSegments,
								data.radialSegments,
								data.p,
								data.q
							);

							break;

						case 'LatheGeometry':
						case 'LatheBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.points,
								data.segments,
								data.phiStart,
								data.phiLength
							);

							break;

						case 'PolyhedronGeometry':
						case 'PolyhedronBufferGeometry':

							geometry = new Geometries[ data.type ](
								data.vertices,
								data.indices,
								data.radius,
								data.details
							);

							break;

						case 'BufferGeometry':

							geometry = bufferGeometryLoader.parse( data );

							break;

						case 'Geometry':

							geometry = geometryLoader.parse( data, this.texturePath ).geometry;

							break;

						default:

							console.warn( 'THREE.ObjectLoader: Unsupported geometry type "' + data.type + '"' );

							continue;

					}

					geometry.uuid = data.uuid;

					if ( data.name !== undefined ) geometry.name = data.name;

					geometries[ data.uuid ] = geometry;

				}

			}

			return geometries;

		},

		parseMaterials: function ( json, textures ) {

			var materials = {};

			if ( json !== undefined ) {

				var loader = new MaterialLoader();
				loader.setTextures( textures );

				for ( var i = 0, l = json.length; i < l; i ++ ) {

					var data = json[ i ];

					if ( data.type === 'MultiMaterial' ) {

						// Deprecated

						var array = [];

						for ( var j = 0; j < data.materials.length; j ++ ) {

							array.push( loader.parse( data.materials[ j ] ) );

						}

						materials[ data.uuid ] = array;

					} else {

						materials[ data.uuid ] = loader.parse( data );

					}

				}

			}

			return materials;

		},

		parseAnimations: function ( json ) {

			var animations = [];

			for ( var i = 0; i < json.length; i ++ ) {

				var clip = AnimationClip.parse( json[ i ] );

				animations.push( clip );

			}

			return animations;

		},

		parseImages: function ( json, onLoad ) {

			var scope = this;
			var images = {};

			function loadImage( url ) {

				scope.manager.itemStart( url );

				return loader.load( url, function () {

					scope.manager.itemEnd( url );

				}, undefined, function () {

					scope.manager.itemEnd( url );
					scope.manager.itemError( url );

				} );

			}

			if ( json !== undefined && json.length > 0 ) {

				var manager = new LoadingManager( onLoad );

				var loader = new ImageLoader( manager );
				loader.setCrossOrigin( this.crossOrigin );

				for ( var i = 0, l = json.length; i < l; i ++ ) {

					var image = json[ i ];
					var path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test( image.url ) ? image.url : scope.texturePath + image.url;

					images[ image.uuid ] = loadImage( path );

				}

			}

			return images;

		},

		parseTextures: function ( json, images ) {

			function parseConstant( value, type ) {

				if ( typeof value === 'number' ) return value;

				console.warn( 'THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value );

				return type[ value ];

			}

			var textures = {};

			if ( json !== undefined ) {

				for ( var i = 0, l = json.length; i < l; i ++ ) {

					var data = json[ i ];

					if ( data.image === undefined ) {

						console.warn( 'THREE.ObjectLoader: No "image" specified for', data.uuid );

					}

					if ( images[ data.image ] === undefined ) {

						console.warn( 'THREE.ObjectLoader: Undefined image', data.image );

					}

					var texture = new Texture( images[ data.image ] );
					texture.needsUpdate = true;

					texture.uuid = data.uuid;

					if ( data.name !== undefined ) texture.name = data.name;

					if ( data.mapping !== undefined ) texture.mapping = parseConstant( data.mapping, TEXTURE_MAPPING );

					if ( data.offset !== undefined ) texture.offset.fromArray( data.offset );
					if ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );
					if ( data.center !== undefined ) texture.center.fromArray( data.center );
					if ( data.rotation !== undefined ) texture.rotation = data.rotation;

					if ( data.wrap !== undefined ) {

						texture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );
						texture.wrapT = parseConstant( data.wrap[ 1 ], TEXTURE_WRAPPING );

					}

					if ( data.minFilter !== undefined ) texture.minFilter = parseConstant( data.minFilter, TEXTURE_FILTER );
					if ( data.magFilter !== undefined ) texture.magFilter = parseConstant( data.magFilter, TEXTURE_FILTER );
					if ( data.anisotropy !== undefined ) texture.anisotropy = data.anisotropy;

					if ( data.flipY !== undefined ) texture.flipY = data.flipY;

					textures[ data.uuid ] = texture;

				}

			}

			return textures;

		},

		parseObject: function () {

			var matrix = new Matrix4();

			return function parseObject( data, geometries, materials ) {

				var object;

				function getGeometry( name ) {

					if ( geometries[ name ] === undefined ) {

						console.warn( 'THREE.ObjectLoader: Undefined geometry', name );

					}

					return geometries[ name ];

				}

				function getMaterial( name ) {

					if ( name === undefined ) return undefined;

					if ( Array.isArray( name ) ) {

						var array = [];

						for ( var i = 0, l = name.length; i < l; i ++ ) {

							var uuid = name[ i ];

							if ( materials[ uuid ] === undefined ) {

								console.warn( 'THREE.ObjectLoader: Undefined material', uuid );

							}

							array.push( materials[ uuid ] );

						}

						return array;

					}

					if ( materials[ name ] === undefined ) {

						console.warn( 'THREE.ObjectLoader: Undefined material', name );

					}

					return materials[ name ];

				}

				switch ( data.type ) {

					case 'Scene':

						object = new Scene();

						if ( data.background !== undefined ) {

							if ( Number.isInteger( data.background ) ) {

								object.background = new Color( data.background );

							}

						}

						if ( data.fog !== undefined ) {

							if ( data.fog.type === 'Fog' ) {

								object.fog = new Fog( data.fog.color, data.fog.near, data.fog.far );

							} else if ( data.fog.type === 'FogExp2' ) {

								object.fog = new FogExp2( data.fog.color, data.fog.density );

							}

						}

						break;

					case 'PerspectiveCamera':

						object = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );

						if ( data.focus !== undefined ) object.focus = data.focus;
						if ( data.zoom !== undefined ) object.zoom = data.zoom;
						if ( data.filmGauge !== undefined ) object.filmGauge = data.filmGauge;
						if ( data.filmOffset !== undefined ) object.filmOffset = data.filmOffset;
						if ( data.view !== undefined ) object.view = Object.assign( {}, data.view );

						break;

					case 'OrthographicCamera':

						object = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );

						break;

					case 'AmbientLight':

						object = new AmbientLight( data.color, data.intensity );

						break;

					case 'DirectionalLight':

						object = new DirectionalLight$1( data.color, data.intensity );

						break;

					case 'PointLight':

						object = new PointLight( data.color, data.intensity, data.distance, data.decay );

						break;

					case 'RectAreaLight':

						object = new RectAreaLight( data.color, data.intensity, data.width, data.height );

						break;

					case 'SpotLight':

						object = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );

						break;

					case 'HemisphereLight':

						object = new HemisphereLight( data.color, data.groundColor, data.intensity );

						break;

					case 'SkinnedMesh':

						console.warn( 'THREE.ObjectLoader.parseObject() does not support SkinnedMesh yet.' );

					case 'Mesh':

						var geometry = getGeometry( data.geometry );
						var material = getMaterial( data.material );

						if ( geometry.bones && geometry.bones.length > 0 ) {

							object = new SkinnedMesh( geometry, material );

						} else {

							object = new Mesh( geometry, material );

						}

						break;

					case 'LOD':

						object = new LOD();

						break;

					case 'Line':

						object = new Line( getGeometry( data.geometry ), getMaterial( data.material ), data.mode );

						break;

					case 'LineLoop':

						object = new LineLoop( getGeometry( data.geometry ), getMaterial( data.material ) );

						break;

					case 'LineSegments':

						object = new LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );

						break;

					case 'PointCloud':
					case 'Points':

						object = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );

						break;

					case 'Sprite':

						object = new Sprite( getMaterial( data.material ) );

						break;

					case 'Group':

						object = new Group();

						break;

					default:

						object = new Object3D();

				}

				object.uuid = data.uuid;

				if ( data.name !== undefined ) object.name = data.name;
				if ( data.matrix !== undefined ) {

					matrix.fromArray( data.matrix );
					matrix.decompose( object.position, object.quaternion, object.scale );

				} else {

					if ( data.position !== undefined ) object.position.fromArray( data.position );
					if ( data.rotation !== undefined ) object.rotation.fromArray( data.rotation );
					if ( data.quaternion !== undefined ) object.quaternion.fromArray( data.quaternion );
					if ( data.scale !== undefined ) object.scale.fromArray( data.scale );

				}

				if ( data.castShadow !== undefined ) object.castShadow = data.castShadow;
				if ( data.receiveShadow !== undefined ) object.receiveShadow = data.receiveShadow;

				if ( data.shadow ) {

					if ( data.shadow.bias !== undefined ) object.shadow.bias = data.shadow.bias;
					if ( data.shadow.radius !== undefined ) object.shadow.radius = data.shadow.radius;
					if ( data.shadow.mapSize !== undefined ) object.shadow.mapSize.fromArray( data.shadow.mapSize );
					if ( data.shadow.camera !== undefined ) object.shadow.camera = this.parseObject( data.shadow.camera );

				}

				if ( data.visible !== undefined ) object.visible = data.visible;
				if ( data.userData !== undefined ) object.userData = data.userData;

				if ( data.children !== undefined ) {

					var children = data.children;

					for ( var i = 0; i < children.length; i ++ ) {

						object.add( this.parseObject( children[ i ], geometries, materials ) );

					}

				}

				if ( data.type === 'LOD' ) {

					var levels = data.levels;

					for ( var l = 0; l < levels.length; l ++ ) {

						var level = levels[ l ];
						var child = object.getObjectByProperty( 'uuid', level.object );

						if ( child !== undefined ) {

							object.addLevel( child, level.distance );

						}

					}

				}

				return object;

			};

		}()

	} );

	var TEXTURE_MAPPING = {
		UVMapping: UVMapping,
		CubeReflectionMapping: CubeReflectionMapping,
		CubeRefractionMapping: CubeRefractionMapping,
		EquirectangularReflectionMapping: EquirectangularReflectionMapping,
		EquirectangularRefractionMapping: EquirectangularRefractionMapping,
		SphericalReflectionMapping: SphericalReflectionMapping,
		CubeUVReflectionMapping: CubeUVReflectionMapping,
		CubeUVRefractionMapping: CubeUVRefractionMapping
	};

	var TEXTURE_WRAPPING = {
		RepeatWrapping: RepeatWrapping,
		ClampToEdgeWrapping: ClampToEdgeWrapping,
		MirroredRepeatWrapping: MirroredRepeatWrapping
	};

	var TEXTURE_FILTER = {
		NearestFilter: NearestFilter,
		NearestMipMapNearestFilter: NearestMipMapNearestFilter,
		NearestMipMapLinearFilter: NearestMipMapLinearFilter,
		LinearFilter: LinearFilter,
		LinearMipMapNearestFilter: LinearMipMapNearestFilter,
		LinearMipMapLinearFilter: LinearMipMapLinearFilter
	};

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 * @author moraxy / https://github.com/moraxy
	 */
	/* global QUnit */

	QUnit.module( 'Lights', () => {

		QUnit.module.todo( 'SpotLightShadow', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSpotLightShadow", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "clone/copy", ( assert ) => {

				var a = new SpotLightShadow();
				var b = new SpotLightShadow();
				var c;

				assert.notDeepEqual( a, b, "Newly instanced shadows are not equal" );

				c = a.clone();
				assert.smartEqual( a, c, "Shadows are identical after clone()" );

				c.mapSize.set( 256, 256 );
				assert.notDeepEqual( a, c, "Shadows are different again after change" );

				b.copy( a );
				assert.smartEqual( a, b, "Shadows are identical after copy()" );

				b.mapSize.set( 512, 512 );
				assert.notDeepEqual( a, b, "Shadows are different again after change" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				var light = new SpotLight();
				var shadow = new SpotLightShadow();

				shadow.bias = 10;
				shadow.radius = 5;
				shadow.mapSize.set( 128, 128 );
				light.shadow = shadow;

				var json = light.toJSON();
				var newLight = new ObjectLoader$1().parse( json );

				assert.smartEqual( newLight.shadow, light.shadow, "Reloaded shadow is equal to the original one" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://clara.io/
	 */

	function AnimationLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( AnimationLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var loader = new FileLoader( scope.manager );
			loader.load( url, function ( text ) {

				onLoad( scope.parse( JSON.parse( text ) ) );

			}, onProgress, onError );

		},

		parse: function ( json, onLoad ) {

			var animations = [];

			for ( var i = 0; i < json.length; i ++ ) {

				var clip = AnimationClip.parse( json[ i ] );

				animations.push( clip );

			}

			onLoad( animations );

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'AnimationLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author Reece Aaron Lecrivain / http://reecenotes.com/
	 */

	function AudioLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( AudioLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var loader = new FileLoader( this.manager );
			loader.setResponseType( 'arraybuffer' );
			loader.load( url, function ( buffer ) {

				var context = AudioContext.getContext();

				context.decodeAudioData( buffer, function ( audioBuffer ) {

					onLoad( audioBuffer );

				} );

			}, onProgress, onError );

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'AudioLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'BufferGeometryLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'Cache', () => {

			// PUBLIC STUFF
			QUnit.test( "add", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "get", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "remove", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clear", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author alteredq / http://alteredqualia.com/
	 */

	function CompressedTexture( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {

		Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );

		this.image = { width: width, height: height };
		this.mipmaps = mipmaps;

		// no flipping for cube textures
		// (also flipping doesn't work for compressed textures )

		this.flipY = false;

		// can't generate mipmaps for compressed textures
		// mips must be embedded in DDS files

		this.generateMipmaps = false;

	}

	CompressedTexture.prototype = Object.create( Texture.prototype );
	CompressedTexture.prototype.constructor = CompressedTexture;

	CompressedTexture.prototype.isCompressedTexture = true;

	/**
	 * @author mrdoob / http://mrdoob.com/
	 *
	 * Abstract Base class to block based textures loader (dds, pvr, ...)
	 */

	function CompressedTextureLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

		// override in sub classes
		this._parser = null;

	}

	Object.assign( CompressedTextureLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var images = [];

			var texture = new CompressedTexture();
			texture.image = images;

			var loader = new FileLoader( this.manager );
			loader.setPath( this.path );
			loader.setResponseType( 'arraybuffer' );

			function loadTexture( i ) {

				loader.load( url[ i ], function ( buffer ) {

					var texDatas = scope._parser( buffer, true );

					images[ i ] = {
						width: texDatas.width,
						height: texDatas.height,
						format: texDatas.format,
						mipmaps: texDatas.mipmaps
					};

					loaded += 1;

					if ( loaded === 6 ) {

						if ( texDatas.mipmapCount === 1 )
							texture.minFilter = LinearFilter;

						texture.format = texDatas.format;
						texture.needsUpdate = true;

						if ( onLoad ) onLoad( texture );

					}

				}, onProgress, onError );

			}

			if ( Array.isArray( url ) ) {

				var loaded = 0;

				for ( var i = 0, il = url.length; i < il; ++ i ) {

					loadTexture( i );

				}

			} else {

				// compressed cubemap texture stored in a single DDS file

				loader.load( url, function ( buffer ) {

					var texDatas = scope._parser( buffer, true );

					if ( texDatas.isCubemap ) {

						var faces = texDatas.mipmaps.length / texDatas.mipmapCount;

						for ( var f = 0; f < faces; f ++ ) {

							images[ f ] = { mipmaps: [] };

							for ( var i = 0; i < texDatas.mipmapCount; i ++ ) {

								images[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );
								images[ f ].format = texDatas.format;
								images[ f ].width = texDatas.width;
								images[ f ].height = texDatas.height;

							}

						}

					} else {

						texture.image.width = texDatas.width;
						texture.image.height = texDatas.height;
						texture.mipmaps = texDatas.mipmaps;

					}

					if ( texDatas.mipmapCount === 1 ) {

						texture.minFilter = LinearFilter;

					}

					texture.format = texDatas.format;
					texture.needsUpdate = true;

					if ( onLoad ) onLoad( texture );

				}, onProgress, onError );

			}

			return texture;

		},

		setPath: function ( value ) {

			this.path = value;
			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'CompressedTextureLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function CubeTextureLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( CubeTextureLoader.prototype, {

		crossOrigin: 'Anonymous',

		load: function ( urls, onLoad, onProgress, onError ) {

			var texture = new CubeTexture();

			var loader = new ImageLoader( this.manager );
			loader.setCrossOrigin( this.crossOrigin );
			loader.setPath( this.path );

			var loaded = 0;

			function loadTexture( i ) {

				loader.load( urls[ i ], function ( image ) {

					texture.images[ i ] = image;

					loaded ++;

					if ( loaded === 6 ) {

						texture.needsUpdate = true;

						if ( onLoad ) onLoad( texture );

					}

				}, undefined, onError );

			}

			for ( var i = 0; i < urls.length; ++ i ) {

				loadTexture( i );

			}

			return texture;

		},

		setCrossOrigin: function ( value ) {

			this.crossOrigin = value;
			return this;

		},

		setPath: function ( value ) {

			this.path = value;
			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'CubeTextureLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setCrossOrigin", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author Nikos M. / https://github.com/foo123/
	 *
	 * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)
	 */

	function DataTextureLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

		// override in sub classes
		this._parser = null;

	}

	Object.assign( DataTextureLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var texture = new DataTexture();

			var loader = new FileLoader( this.manager );
			loader.setResponseType( 'arraybuffer' );

			loader.load( url, function ( buffer ) {

				var texData = scope._parser( buffer );

				if ( ! texData ) return;

				if ( undefined !== texData.image ) {

					texture.image = texData.image;

				} else if ( undefined !== texData.data ) {

					texture.image.width = texData.width;
					texture.image.height = texData.height;
					texture.image.data = texData.data;

				}

				texture.wrapS = undefined !== texData.wrapS ? texData.wrapS : ClampToEdgeWrapping;
				texture.wrapT = undefined !== texData.wrapT ? texData.wrapT : ClampToEdgeWrapping;

				texture.magFilter = undefined !== texData.magFilter ? texData.magFilter : LinearFilter;
				texture.minFilter = undefined !== texData.minFilter ? texData.minFilter : LinearMipMapLinearFilter;

				texture.anisotropy = undefined !== texData.anisotropy ? texData.anisotropy : 1;

				if ( undefined !== texData.format ) {

					texture.format = texData.format;

				}
				if ( undefined !== texData.type ) {

					texture.type = texData.type;

				}

				if ( undefined !== texData.mipmaps ) {

					texture.mipmaps = texData.mipmaps;

				}

				if ( 1 === texData.mipmapCount ) {

					texture.minFilter = LinearFilter;

				}

				texture.needsUpdate = true;

				if ( onLoad ) onLoad( texture, texData );

			}, onProgress, onError );


			return texture;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'DataTextureLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'FileLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setResponseType", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setWithCredentials", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setMimeType", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setRequestHeader", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	function FontLoader( manager ) {

		this.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;

	}

	Object.assign( FontLoader.prototype, {

		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;

			var loader = new FileLoader( this.manager );
			loader.setPath( this.path );
			loader.load( url, function ( text ) {

				var json;

				try {

					json = JSON.parse( text );

				} catch ( e ) {

					console.warn( 'THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.' );
					json = JSON.parse( text.substring( 65, text.length - 2 ) );

				}

				var font = scope.parse( json );

				if ( onLoad ) onLoad( font );

			}, onProgress, onError );

		},

		parse: function ( json ) {

			return new Font( json );

		},

		setPath: function ( value ) {

			this.path = value;
			return this;

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'FontLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'ImageLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setCrossOrigin", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'JSONLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setTexturePath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'Loader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// STATIC STUFF
			QUnit.test( "Handlers.add", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "Handlers.get", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "extractUrlBase", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "initMaterials", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "createMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'LoadingManager', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "onStart", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onLoad", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onProgress", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onError", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "itemStart", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "itemEnd", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "itemError", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'MaterialLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setTextures", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'ObjectLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setTexturePath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setCrossOrigin", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parse", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseGeometries", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseMaterials", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseAnimations", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseImages", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseTextures", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "parseObject", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Loaders', () => {

		QUnit.module.todo( 'TextureLoader', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "load", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setCrossOrigin", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPath", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'LineBasicMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLineBasicMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'LineDashedMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLineDashedMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'Material', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onBeforeCompile", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setValues", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshBasicMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshBasicMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshDepthMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshDepthMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshDistanceMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshDistanceMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshLambertMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshLambertMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshNormalMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshNormalMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshPhongMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshPhongMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshPhysicalMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshPhysicalMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshStandardMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshStandardMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'MeshToonMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMeshToonMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'PointsMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isPointsMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'RawShaderMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isRawShaderMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'ShaderMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isShaderwMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'LineBasicMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isShadowMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Materials', () => {

		QUnit.module.todo( 'SpriteMaterial', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSpriteMaterial", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Box2', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Box2();
				assert.ok( a.min.equals( posInf2 ), "Passed!" );
				assert.ok( a.max.equals( negInf2 ), "Passed!" );

				var a = new Box2( zero2.clone(), zero2.clone() );
				assert.ok( a.min.equals( zero2 ), "Passed!" );
				assert.ok( a.max.equals( zero2 ), "Passed!" );

				var a = new Box2( zero2.clone(), one2.clone() );
				assert.ok( a.min.equals( zero2 ), "Passed!" );
				assert.ok( a.max.equals( one2 ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Box2();

				a.set( zero2, one2 );
				assert.ok( a.min.equals( zero2 ), "Passed!" );
				assert.ok( a.max.equals( one2 ), "Passed!" );

			} );

			QUnit.test( "setFromPoints", ( assert ) => {

				var a = new Box2();

				a.setFromPoints( [ zero2, one2, two2 ] );
				assert.ok( a.min.equals( zero2 ), "Passed!" );
				assert.ok( a.max.equals( two2 ), "Passed!" );

				a.setFromPoints( [ one2 ] );
				assert.ok( a.min.equals( one2 ), "Passed!" );
				assert.ok( a.max.equals( one2 ), "Passed!" );

				a.setFromPoints( [] );
				assert.ok( a.isEmpty(), "Passed!" );

			} );

			QUnit.test( "setFromCenterAndSize", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Box2( zero2.clone(), one2.clone() );
				var b = new Box2().copy( a );
				assert.ok( b.min.equals( zero2 ), "Passed!" );
				assert.ok( b.max.equals( one2 ), "Passed!" );

				// ensure that it is a true copy
				a.min = zero2;
				a.max = one2;
				assert.ok( b.min.equals( zero2 ), "Passed!" );
				assert.ok( b.max.equals( one2 ), "Passed!" );

			} );

			QUnit.test( "empty/makeEmpty", ( assert ) => {

				var a = new Box2();

				assert.ok( a.isEmpty(), "Passed!" );

				var a = new Box2( zero2.clone(), one2.clone() );
				assert.ok( ! a.isEmpty(), "Passed!" );

				a.makeEmpty();
				assert.ok( a.isEmpty(), "Passed!" );

			} );

			QUnit.test( "isEmpty", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getCenter", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );

				assert.ok( a.getCenter().equals( zero2 ), "Passed!" );

				var a = new Box2( zero2, one2 );
				var midpoint = one2.clone().multiplyScalar( 0.5 );
				assert.ok( a.getCenter().equals( midpoint ), "Passed!" );

			} );

			QUnit.test( "getSize", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );

				assert.ok( a.getSize().equals( zero2 ), "Passed!" );

				var a = new Box2( zero2.clone(), one2.clone() );
				assert.ok( a.getSize().equals( one2 ), "Passed!" );

			} );

			QUnit.test( "expandByPoint", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );

				a.expandByPoint( zero2 );
				assert.ok( a.getSize().equals( zero2 ), "Passed!" );

				a.expandByPoint( one2 );
				assert.ok( a.getSize().equals( one2 ), "Passed!" );

				a.expandByPoint( one2.clone().negate() );
				assert.ok( a.getSize().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
				assert.ok( a.getCenter().equals( zero2 ), "Passed!" );

			} );

			QUnit.test( "expandByVector", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );

				a.expandByVector( zero2 );
				assert.ok( a.getSize().equals( zero2 ), "Passed!" );

				a.expandByVector( one2 );
				assert.ok( a.getSize().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
				assert.ok( a.getCenter().equals( zero2 ), "Passed!" );

			} );

			QUnit.test( "expandByScalar", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );

				a.expandByScalar( 0 );
				assert.ok( a.getSize().equals( zero2 ), "Passed!" );

				a.expandByScalar( 1 );
				assert.ok( a.getSize().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
				assert.ok( a.getCenter().equals( zero2 ), "Passed!" );

			} );

			QUnit.test( "containsPoint", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );

				assert.ok( a.containsPoint( zero2 ), "Passed!" );
				assert.ok( ! a.containsPoint( one2 ), "Passed!" );

				a.expandByScalar( 1 );
				assert.ok( a.containsPoint( zero2 ), "Passed!" );
				assert.ok( a.containsPoint( one2 ), "Passed!" );
				assert.ok( a.containsPoint( one2.clone().negate() ), "Passed!" );

			} );

			QUnit.test( "containsBox", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( zero2.clone(), one2.clone() );
				var c = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.containsBox( a ), "Passed!" );
				assert.ok( ! a.containsBox( b ), "Passed!" );
				assert.ok( ! a.containsBox( c ), "Passed!" );

				assert.ok( b.containsBox( a ), "Passed!" );
				assert.ok( c.containsBox( a ), "Passed!" );
				assert.ok( ! b.containsBox( c ), "Passed!" );

			} );

			QUnit.test( "getParameter", ( assert ) => {

				var a = new Box2( zero2.clone(), one2.clone() );
				var b = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.getParameter( new Vector2( 0, 0 ) ).equals( new Vector2( 0, 0 ) ), "Passed!" );
				assert.ok( a.getParameter( new Vector2( 1, 1 ) ).equals( new Vector2( 1, 1 ) ), "Passed!" );

				assert.ok( b.getParameter( new Vector2( - 1, - 1 ) ).equals( new Vector2( 0, 0 ) ), "Passed!" );
				assert.ok( b.getParameter( new Vector2( 0, 0 ) ).equals( new Vector2( 0.5, 0.5 ) ), "Passed!" );
				assert.ok( b.getParameter( new Vector2( 1, 1 ) ).equals( new Vector2( 1, 1 ) ), "Passed!" );

			} );

			QUnit.test( "intersectsBox", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( zero2.clone(), one2.clone() );
				var c = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.intersectsBox( a ), "Passed!" );
				assert.ok( a.intersectsBox( b ), "Passed!" );
				assert.ok( a.intersectsBox( c ), "Passed!" );

				assert.ok( b.intersectsBox( a ), "Passed!" );
				assert.ok( c.intersectsBox( a ), "Passed!" );
				assert.ok( b.intersectsBox( c ), "Passed!" );

				b.translate( new Vector2( 2, 2 ) );
				assert.ok( ! a.intersectsBox( b ), "Passed!" );
				assert.ok( ! b.intersectsBox( a ), "Passed!" );
				assert.ok( ! b.intersectsBox( c ), "Passed!" );

			} );

			QUnit.test( "clampPoint", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.clampPoint( new Vector2( 0, 0 ) ).equals( new Vector2( 0, 0 ) ), "Passed!" );
				assert.ok( a.clampPoint( new Vector2( 1, 1 ) ).equals( new Vector2( 0, 0 ) ), "Passed!" );
				assert.ok( a.clampPoint( new Vector2( - 1, - 1 ) ).equals( new Vector2( 0, 0 ) ), "Passed!" );

				assert.ok( b.clampPoint( new Vector2( 2, 2 ) ).equals( new Vector2( 1, 1 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector2( 1, 1 ) ).equals( new Vector2( 1, 1 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector2( 0, 0 ) ).equals( new Vector2( 0, 0 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector2( - 1, - 1 ) ).equals( new Vector2( - 1, - 1 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector2( - 2, - 2 ) ).equals( new Vector2( - 1, - 1 ) ), "Passed!" );

			} );

			QUnit.test( "distanceToPoint", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.distanceToPoint( new Vector2( 0, 0 ) ) == 0, "Passed!" );
				assert.ok( a.distanceToPoint( new Vector2( 1, 1 ) ) == Math.sqrt( 2 ), "Passed!" );
				assert.ok( a.distanceToPoint( new Vector2( - 1, - 1 ) ) == Math.sqrt( 2 ), "Passed!" );

				assert.ok( b.distanceToPoint( new Vector2( 2, 2 ) ) == Math.sqrt( 2 ), "Passed!" );
				assert.ok( b.distanceToPoint( new Vector2( 1, 1 ) ) == 0, "Passed!" );
				assert.ok( b.distanceToPoint( new Vector2( 0, 0 ) ) == 0, "Passed!" );
				assert.ok( b.distanceToPoint( new Vector2( - 1, - 1 ) ) == 0, "Passed!" );
				assert.ok( b.distanceToPoint( new Vector2( - 2, - 2 ) ) == Math.sqrt( 2 ), "Passed!" );

			} );

			QUnit.test( "intersect", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( zero2.clone(), one2.clone() );
				var c = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.clone().intersect( a ).equals( a ), "Passed!" );
				assert.ok( a.clone().intersect( b ).equals( a ), "Passed!" );
				assert.ok( b.clone().intersect( b ).equals( b ), "Passed!" );
				assert.ok( a.clone().intersect( c ).equals( a ), "Passed!" );
				assert.ok( b.clone().intersect( c ).equals( b ), "Passed!" );
				assert.ok( c.clone().intersect( c ).equals( c ), "Passed!" );

			} );

			QUnit.test( "union", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( zero2.clone(), one2.clone() );
				var c = new Box2( one2.clone().negate(), one2.clone() );

				assert.ok( a.clone().union( a ).equals( a ), "Passed!" );
				assert.ok( a.clone().union( b ).equals( b ), "Passed!" );
				assert.ok( a.clone().union( c ).equals( c ), "Passed!" );
				assert.ok( b.clone().union( c ).equals( c ), "Passed!" );

			} );

			QUnit.test( "translate", ( assert ) => {

				var a = new Box2( zero2.clone(), zero2.clone() );
				var b = new Box2( zero2.clone(), one2.clone() );
				var c = new Box2( one2.clone().negate(), one2.clone() );
				var d = new Box2( one2.clone().negate(), zero2.clone() );

				assert.ok( a.clone().translate( one2 ).equals( new Box2( one2, one2 ) ), "Passed!" );
				assert.ok( a.clone().translate( one2 ).translate( one2.clone().negate() ).equals( a ), "Passed!" );
				assert.ok( d.clone().translate( one2 ).equals( b ), "Passed!" );
				assert.ok( b.clone().translate( one2.clone().negate() ).equals( d ), "Passed!" );

			} );

			QUnit.test( "equals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	function compareBox( a, b, threshold ) {

		threshold = threshold || 0.0001;
		return ( a.min.distanceTo( b.min ) < threshold &&
		a.max.distanceTo( b.max ) < threshold );

	}

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Box3', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Box3();
				assert.ok( a.min.equals( posInf3 ), "Passed!" );
				assert.ok( a.max.equals( negInf3 ), "Passed!" );

				var a = new Box3( zero3.clone(), zero3.clone() );
				assert.ok( a.min.equals( zero3 ), "Passed!" );
				assert.ok( a.max.equals( zero3 ), "Passed!" );

				var a = new Box3( zero3.clone(), one3.clone() );
				assert.ok( a.min.equals( zero3 ), "Passed!" );
				assert.ok( a.max.equals( one3 ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isBox3", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Box3();

				a.set( zero3, one3 );
				assert.ok( a.min.equals( zero3 ), "Passed!" );
				assert.ok( a.max.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "setFromArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFromBufferAttribute", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var bigger = new BufferAttribute( new Float32Array( [
					- 2, - 2, - 2, 2, 2, 2, 1.5, 1.5, 1.5, 0, 0, 0
				] ), 3 );
				var smaller = new BufferAttribute( new Float32Array( [
					- 0.5, - 0.5, - 0.5, 0.5, 0.5, 0.5, 0, 0, 0
				] ), 3 );
				var newMin = new Vector3( - 2, - 2, - 2 );
				var newMax = new Vector3( 2, 2, 2 );

				a.setFromBufferAttribute( bigger );
				assert.ok( a.min.equals( newMin ), "Bigger box: correct new minimum" );
				assert.ok( a.max.equals( newMax ), "Bigger box: correct new maximum" );

				newMin.set( - 0.5, - 0.5, - 0.5 );
				newMax.set( 0.5, 0.5, 0.5 );

				a.setFromBufferAttribute( smaller );
				assert.ok( a.min.equals( newMin ), "Smaller box: correct new minimum" );
				assert.ok( a.max.equals( newMax ), "Smaller box: correct new maximum" );

			} );

			QUnit.test( "setFromPoints", ( assert ) => {

				var a = new Box3();

				a.setFromPoints( [ zero3, one3, two3 ] );
				assert.ok( a.min.equals( zero3 ), "Passed!" );
				assert.ok( a.max.equals( two3 ), "Passed!" );

				a.setFromPoints( [ one3 ] );
				assert.ok( a.min.equals( one3 ), "Passed!" );
				assert.ok( a.max.equals( one3 ), "Passed!" );

				a.setFromPoints( [] );
				assert.ok( a.isEmpty(), "Passed!" );

			} );

			QUnit.test( "setFromCenterAndSize", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var b = a.clone();
				var newCenter = one3;
				var newSize = two3;

				a.setFromCenterAndSize( a.getCenter(), a.getSize() );
				assert.ok( a.equals( b ), "Same values: no changes" );

				a.setFromCenterAndSize( newCenter, a.getSize() );
				assert.ok( a.getCenter().equals( newCenter ), "Move center: correct new center" );
				assert.ok( a.getSize().equals( b.getSize() ), "Move center: no change in size" );
				assert.notOk( a.equals( b ), "Move center: no longer equal to old values" );

				a.setFromCenterAndSize( a.getCenter(), newSize );
				assert.ok( a.getCenter().equals( newCenter ), "Resize: no change to center" );
				assert.ok( a.getSize().equals( newSize ), "Resize: correct new size" );
				assert.notOk( a.equals( b ), "Resize: no longer equal to old values" );

			} );

			QUnit.test( "setFromObject/BufferGeometry", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var object = new Mesh( new BoxBufferGeometry( 2, 2, 2 ) );
				var child = new Mesh( new BoxBufferGeometry( 1, 1, 1 ) );
				object.add( child );

				a.setFromObject( object );
				assert.ok( a.min.equals( new Vector3( - 1, - 1, - 1 ) ), "Correct new minimum" );
				assert.ok( a.max.equals( new Vector3( 1, 1, 1 ) ), "Correct new maximum" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var b = new Box3().copy( a );
				assert.ok( b.min.equals( zero3 ), "Passed!" );
				assert.ok( b.max.equals( one3 ), "Passed!" );

				// ensure that it is a true copy
				a.min = zero3;
				a.max = one3;
				assert.ok( b.min.equals( zero3 ), "Passed!" );
				assert.ok( b.max.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "empty/makeEmpty", ( assert ) => {

				var a = new Box3();

				assert.ok( a.isEmpty(), "Passed!" );

				var a = new Box3( zero3.clone(), one3.clone() );
				assert.ok( ! a.isEmpty(), "Passed!" );

				a.makeEmpty();
				assert.ok( a.isEmpty(), "Passed!" );

			} );

			QUnit.test( "isEmpty", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getCenter", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );

				assert.ok( a.getCenter().equals( zero3 ), "Passed!" );

				var a = new Box3( zero3.clone(), one3.clone() );
				var midpoint = one3.clone().multiplyScalar( 0.5 );
				assert.ok( a.getCenter().equals( midpoint ), "Passed!" );

			} );

			QUnit.test( "getSize", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );

				assert.ok( a.getSize().equals( zero3 ), "Passed!" );

				var a = new Box3( zero3.clone(), one3.clone() );
				assert.ok( a.getSize().equals( one3 ), "Passed!" );

			} );

			QUnit.test( "expandByPoint", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );

				a.expandByPoint( zero3 );
				assert.ok( a.getSize().equals( zero3 ), "Passed!" );

				a.expandByPoint( one3 );
				assert.ok( a.getSize().equals( one3 ), "Passed!" );

				a.expandByPoint( one3.clone().negate() );
				assert.ok( a.getSize().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
				assert.ok( a.getCenter().equals( zero3 ), "Passed!" );

			} );

			QUnit.test( "expandByVector", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );

				a.expandByVector( zero3 );
				assert.ok( a.getSize().equals( zero3 ), "Passed!" );

				a.expandByVector( one3 );
				assert.ok( a.getSize().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
				assert.ok( a.getCenter().equals( zero3 ), "Passed!" );

			} );

			QUnit.test( "expandByScalar", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );

				a.expandByScalar( 0 );
				assert.ok( a.getSize().equals( zero3 ), "Passed!" );

				a.expandByScalar( 1 );
				assert.ok( a.getSize().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
				assert.ok( a.getCenter().equals( zero3 ), "Passed!" );

			} );

			QUnit.test( "expandByObject", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var b = a.clone();
				var bigger = new Mesh( new BoxGeometry( 2, 2, 2 ) );
				var smaller = new Mesh( new BoxGeometry( 0.5, 0.5, 0.5 ) );
				var child = new Mesh( new BoxGeometry( 1, 1, 1 ) );

				// just a bigger box to begin with
				a.expandByObject( bigger );
				assert.ok( a.min.equals( new Vector3( - 1, - 1, - 1 ) ), "Bigger box: correct new minimum" );
				assert.ok( a.max.equals( new Vector3( 1, 1, 1 ) ), "Bigger box: correct new maximum" );

				// a translated, bigger box
				a.copy( b );
				bigger.translateX( 2 );
				a.expandByObject( bigger );
				assert.ok( a.min.equals( new Vector3( 0, - 1, - 1 ) ), "Translated, bigger box: correct new minimum" );
				assert.ok( a.max.equals( new Vector3( 3, 1, 1 ) ), "Translated, bigger box: correct new maximum" );

				// a translated, bigger box with child
				a.copy( b );
				bigger.add( child );
				a.expandByObject( bigger );
				assert.ok( a.min.equals( new Vector3( 0, - 1, - 1 ) ), "Translated, bigger box with child: correct new minimum" );
				assert.ok( a.max.equals( new Vector3( 3, 1, 1 ) ), "Translated, bigger box with child: correct new maximum" );

				// a translated, bigger box with a translated child
				a.copy( b );
				child.translateX( 2 );
				a.expandByObject( bigger );
				assert.ok( a.min.equals( new Vector3( 0, - 1, - 1 ) ), "Translated, bigger box with translated child: correct new minimum" );
				assert.ok( a.max.equals( new Vector3( 4.5, 1, 1 ) ), "Translated, bigger box with translated child: correct new maximum" );

				// a smaller box
				a.copy( b );
				a.expandByObject( smaller );
				assert.ok( a.min.equals( new Vector3( - 0.25, - 0.25, - 0.25 ) ), "Smaller box: correct new minimum" );
				assert.ok( a.max.equals( new Vector3( 1, 1, 1 ) ), "Smaller box: correct new maximum" );

			} );

			QUnit.test( "containsPoint", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );

				assert.ok( a.containsPoint( zero3 ), "Passed!" );
				assert.ok( ! a.containsPoint( one3 ), "Passed!" );

				a.expandByScalar( 1 );
				assert.ok( a.containsPoint( zero3 ), "Passed!" );
				assert.ok( a.containsPoint( one3 ), "Passed!" );
				assert.ok( a.containsPoint( one3.clone().negate() ), "Passed!" );

			} );

			QUnit.test( "containsBox", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.containsBox( a ), "Passed!" );
				assert.ok( ! a.containsBox( b ), "Passed!" );
				assert.ok( ! a.containsBox( c ), "Passed!" );

				assert.ok( b.containsBox( a ), "Passed!" );
				assert.ok( c.containsBox( a ), "Passed!" );
				assert.ok( ! b.containsBox( c ), "Passed!" );

			} );

			QUnit.test( "getParameter", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var b = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.getParameter( new Vector3( 0, 0, 0 ) ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( a.getParameter( new Vector3( 1, 1, 1 ) ).equals( new Vector3( 1, 1, 1 ) ), "Passed!" );

				assert.ok( b.getParameter( new Vector3( - 1, - 1, - 1 ) ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( b.getParameter( new Vector3( 0, 0, 0 ) ).equals( new Vector3( 0.5, 0.5, 0.5 ) ), "Passed!" );
				assert.ok( b.getParameter( new Vector3( 1, 1, 1 ) ).equals( new Vector3( 1, 1, 1 ) ), "Passed!" );

			} );

			QUnit.test( "intersectsBox", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.intersectsBox( a ), "Passed!" );
				assert.ok( a.intersectsBox( b ), "Passed!" );
				assert.ok( a.intersectsBox( c ), "Passed!" );

				assert.ok( b.intersectsBox( a ), "Passed!" );
				assert.ok( c.intersectsBox( a ), "Passed!" );
				assert.ok( b.intersectsBox( c ), "Passed!" );

				b.translate( new Vector3( 2, 2, 2 ) );
				assert.ok( ! a.intersectsBox( b ), "Passed!" );
				assert.ok( ! b.intersectsBox( a ), "Passed!" );
				assert.ok( ! b.intersectsBox( c ), "Passed!" );

			} );

			QUnit.test( "intersectsSphere", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var b = new Sphere( zero3.clone(), 1 );

				assert.ok( a.intersectsSphere( b ), "Passed!" );

				b.translate( new Vector3( 2, 2, 2 ) );
				assert.ok( ! a.intersectsSphere( b ), "Passed!" );

			} );

			QUnit.test( "intersectsPlane", ( assert ) => {

				var a = new Box3( zero3.clone(), one3.clone() );
				var b = new Plane( new Vector3( 0, 1, 0 ), 1 );
				var c = new Plane( new Vector3( 0, 1, 0 ), 1.25 );
				var d = new Plane( new Vector3( 0, - 1, 0 ), 1.25 );

				assert.ok( a.intersectsPlane( b ), "Passed!" );
				assert.ok( ! a.intersectsPlane( c ), "Passed!" );
				assert.ok( ! a.intersectsPlane( d ), "Passed!" );

			} );

			QUnit.test( "clampPoint", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.clampPoint( new Vector3( 0, 0, 0 ) ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( a.clampPoint( new Vector3( 1, 1, 1 ) ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( a.clampPoint( new Vector3( - 1, - 1, - 1 ) ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				assert.ok( b.clampPoint( new Vector3( 2, 2, 2 ) ).equals( new Vector3( 1, 1, 1 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector3( 1, 1, 1 ) ).equals( new Vector3( 1, 1, 1 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector3( 0, 0, 0 ) ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector3( - 1, - 1, - 1 ) ).equals( new Vector3( - 1, - 1, - 1 ) ), "Passed!" );
				assert.ok( b.clampPoint( new Vector3( - 2, - 2, - 2 ) ).equals( new Vector3( - 1, - 1, - 1 ) ), "Passed!" );

			} );

			QUnit.test( "distanceToPoint", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.distanceToPoint( new Vector3( 0, 0, 0 ) ) == 0, "Passed!" );
				assert.ok( a.distanceToPoint( new Vector3( 1, 1, 1 ) ) == Math.sqrt( 3 ), "Passed!" );
				assert.ok( a.distanceToPoint( new Vector3( - 1, - 1, - 1 ) ) == Math.sqrt( 3 ), "Passed!" );

				assert.ok( b.distanceToPoint( new Vector3( 2, 2, 2 ) ) == Math.sqrt( 3 ), "Passed!" );
				assert.ok( b.distanceToPoint( new Vector3( 1, 1, 1 ) ) == 0, "Passed!" );
				assert.ok( b.distanceToPoint( new Vector3( 0, 0, 0 ) ) == 0, "Passed!" );
				assert.ok( b.distanceToPoint( new Vector3( - 1, - 1, - 1 ) ) == 0, "Passed!" );
				assert.ok( b.distanceToPoint( new Vector3( - 2, - 2, - 2 ) ) == Math.sqrt( 3 ), "Passed!" );

			} );

			QUnit.test( "getBoundingSphere", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.getBoundingSphere().equals( new Sphere( zero3, 0 ) ), "Passed!" );
				assert.ok( b.getBoundingSphere().equals( new Sphere( one3.clone().multiplyScalar( 0.5 ), Math.sqrt( 3 ) * 0.5 ) ), "Passed!" );
				assert.ok( c.getBoundingSphere().equals( new Sphere( zero3, Math.sqrt( 12 ) * 0.5 ) ), "Passed!" );

			} );

			QUnit.test( "intersect", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.clone().intersect( a ).equals( a ), "Passed!" );
				assert.ok( a.clone().intersect( b ).equals( a ), "Passed!" );
				assert.ok( b.clone().intersect( b ).equals( b ), "Passed!" );
				assert.ok( a.clone().intersect( c ).equals( a ), "Passed!" );
				assert.ok( b.clone().intersect( c ).equals( b ), "Passed!" );
				assert.ok( c.clone().intersect( c ).equals( c ), "Passed!" );

			} );

			QUnit.test( "union", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );

				assert.ok( a.clone().union( a ).equals( a ), "Passed!" );
				assert.ok( a.clone().union( b ).equals( b ), "Passed!" );
				assert.ok( a.clone().union( c ).equals( c ), "Passed!" );
				assert.ok( b.clone().union( c ).equals( c ), "Passed!" );

			} );

			QUnit.test( "applyMatrix4", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );
				var d = new Box3( one3.clone().negate(), zero3.clone() );

				var m = new Matrix4().makeTranslation( 1, - 2, 1 );
				var t1 = new Vector3( 1, - 2, 1 );

				assert.ok( compareBox( a.clone().applyMatrix4( m ), a.clone().translate( t1 ) ), "Passed!" );
				assert.ok( compareBox( b.clone().applyMatrix4( m ), b.clone().translate( t1 ) ), "Passed!" );
				assert.ok( compareBox( c.clone().applyMatrix4( m ), c.clone().translate( t1 ) ), "Passed!" );
				assert.ok( compareBox( d.clone().applyMatrix4( m ), d.clone().translate( t1 ) ), "Passed!" );

			} );

			QUnit.test( "translate", ( assert ) => {

				var a = new Box3( zero3.clone(), zero3.clone() );
				var b = new Box3( zero3.clone(), one3.clone() );
				var c = new Box3( one3.clone().negate(), one3.clone() );
				var d = new Box3( one3.clone().negate(), zero3.clone() );

				assert.ok( a.clone().translate( one3 ).equals( new Box3( one3, one3 ) ), "Passed!" );
				assert.ok( a.clone().translate( one3 ).translate( one3.clone().negate() ).equals( a ), "Passed!" );
				assert.ok( d.clone().translate( one3 ).equals( b ), "Passed!" );
				assert.ok( b.clone().translate( one3.clone().negate() ).equals( d ), "Passed!" );

			} );

			QUnit.test( "equals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Color', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				// default ctor
				var c = new Color();
				assert.ok( c.r, "Red: " + c.r );
				assert.ok( c.g, "Green: " + c.g );
				assert.ok( c.b, "Blue: " + c.b );

				// rgb ctor
				var c = new Color( 1, 1, 1 );
				assert.ok( c.r == 1, "Passed" );
				assert.ok( c.g == 1, "Passed" );
				assert.ok( c.b == 1, "Passed" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isColor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Color();
				var b = new Color( 0.5, 0, 0 );
				var c = new Color( 0xFF0000 );
				var d = new Color( 0, 1.0, 0 );

				a.set( b );
				assert.ok( a.equals( b ), "Set with Color instance" );

				a.set( 0xFF0000 );
				assert.ok( a.equals( c ), "Set with number" );

				a.set( "rgb(0,255,0)" );
				assert.ok( a.equals( d ), "Set with style" );

			} );

			QUnit.test( "setScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setHex", ( assert ) => {

				var c = new Color();
				c.setHex( 0xFA8072 );
				assert.ok( c.getHex() == 0xFA8072, "Hex: " + c.getHex() );

			} );

			QUnit.test( "setRGB", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setHSL", ( assert ) => {

				var c = new Color();
				c.setHSL( 0.75, 1.0, 0.25 );
				var hsl = c.getHSL();

				assert.ok( hsl.h == 0.75, "hue: " + hsl.h );
				assert.ok( hsl.s == 1.00, "saturation: " + hsl.s );
				assert.ok( hsl.l == 0.25, "lightness: " + hsl.l );

			} );

			QUnit.test( "setStyle", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var c = new Color( 'teal' );
				var c2 = c.clone();
				assert.ok( c2.getHex() == 0x008080, "Hex c2: " + c2.getHex() );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copyGammaToLinear", ( assert ) => {

				var c = new Color();
				var c2 = new Color();
				c2.setRGB( 0.3, 0.5, 0.9 );
				c.copyGammaToLinear( c2 );
				assert.ok( c.r == 0.09, "Red c: " + c.r + " Red c2: " + c2.r );
				assert.ok( c.g == 0.25, "Green c: " + c.g + " Green c2: " + c2.g );
				assert.ok( c.b == 0.81, "Blue c: " + c.b + " Blue c2: " + c2.b );

			} );

			QUnit.test( "copyLinearToGamma", ( assert ) => {

				var c = new Color();
				var c2 = new Color();
				c2.setRGB( 0.09, 0.25, 0.81 );
				c.copyLinearToGamma( c2 );
				assert.ok( c.r == 0.3, "Red c: " + c.r + " Red c2: " + c2.r );
				assert.ok( c.g == 0.5, "Green c: " + c.g + " Green c2: " + c2.g );
				assert.ok( c.b == 0.9, "Blue c: " + c.b + " Blue c2: " + c2.b );

			} );

			QUnit.test( "convertGammaToLinear", ( assert ) => {

				var c = new Color();
				c.setRGB( 0.3, 0.5, 0.9 );
				c.convertGammaToLinear();
				assert.ok( c.r == 0.09, "Red: " + c.r );
				assert.ok( c.g == 0.25, "Green: " + c.g );
				assert.ok( c.b == 0.81, "Blue: " + c.b );

			} );

			QUnit.test( "convertLinearToGamma", ( assert ) => {

				var c = new Color();
				c.setRGB( 4, 9, 16 );
				c.convertLinearToGamma();
				assert.ok( c.r == 2, "Red: " + c.r );
				assert.ok( c.g == 3, "Green: " + c.g );
				assert.ok( c.b == 4, "Blue: " + c.b );

			} );

			QUnit.test( "getHex", ( assert ) => {

				var c = new Color( 'red' );
				var res = c.getHex();
				assert.ok( res == 0xFF0000, "Hex: " + res );

			} );

			QUnit.test( "getHexString", ( assert ) => {

				var c = new Color( 'tomato' );
				var res = c.getHexString();
				assert.ok( res == 'ff6347', "Hex: " + res );

			} );

			QUnit.test( "getHSL", ( assert ) => {

				var c = new Color( 0x80ffff );
				var hsl = c.getHSL();

				assert.ok( hsl.h == 0.5, "hue: " + hsl.h );
				assert.ok( hsl.s == 1.0, "saturation: " + hsl.s );
				assert.ok( ( Math.round( parseFloat( hsl.l ) * 100 ) / 100 ) == 0.75, "lightness: " + hsl.l );

			} );

			QUnit.test( "getStyle", ( assert ) => {

				var c = new Color( 'plum' );
				var res = c.getStyle();
				assert.ok( res == 'rgb(221,160,221)', "style: " + res );

			} );

			QUnit.test( "offsetHSL", ( assert ) => {

				var a = new Color( "hsl(120,50%,50%)" );
				var b = new Color( 0.36, 0.84, 0.648 );

				a.offsetHSL( 0.1, 0.1, 0.1 );

				assert.ok( Math.abs( a.r - b.r ) <= eps, "Check r" );
				assert.ok( Math.abs( a.g - b.g ) <= eps, "Check g" );
				assert.ok( Math.abs( a.b - b.b ) <= eps, "Check b" );

			} );

			QUnit.test( "add", ( assert ) => {

				var a = new Color( 0x0000FF );
				var b = new Color( 0xFF0000 );
				var c = new Color( 0xFF00FF );

				a.add( b );

				assert.ok( a.equals( c ), "Check new value" );

			} );

			QUnit.test( "addColors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addScalar", ( assert ) => {

				var a = new Color( 0.1, 0.0, 0.0 );
				var b = new Color( 0.6, 0.5, 0.5 );

				a.addScalar( 0.5 );

				assert.ok( a.equals( b ), "Check new value" );

			} );

			QUnit.test( "sub", ( assert ) => {

				var a = new Color( 0x0000CC );
				var b = new Color( 0xFF0000 );
				var c = new Color( 0x0000AA );

				a.sub( b );
				assert.strictEqual( a.getHex(), 0xCC, "Difference too large" );

				a.sub( c );
				assert.strictEqual( a.getHex(), 0x22, "Difference fine" );

			} );

			QUnit.test( "multiply", ( assert ) => {

				var a = new Color( 1, 0, 0.5 );
				var b = new Color( 0.5, 1, 0.5 );
				var c = new Color( 0.5, 0, 0.25 );

				a.multiply( b );
				assert.ok( a.equals( c ), "Check new value" );

			} );

			QUnit.test( "multiplyScalar", ( assert ) => {

				var a = new Color( 0.25, 0, 0.5 );
				var b = new Color( 0.5, 0, 1 );

				a.multiplyScalar( 2 );
				assert.ok( a.equals( b ), "Check new value" );

			} );

			QUnit.test( "copyHex", ( assert ) => {

				var c = new Color();
				var c2 = new Color( 0xF5FFFA );
				c.copy( c2 );
				assert.ok( c.getHex() == c2.getHex(), "Hex c: " + c.getHex() + " Hex c2: " + c2.getHex() );

			} );

			QUnit.test( "copyColorString", ( assert ) => {

				var c = new Color();
				var c2 = new Color( 'ivory' );
				c.copy( c2 );
				assert.ok( c.getHex() == c2.getHex(), "Hex c: " + c.getHex() + " Hex c2: " + c2.getHex() );

			} );

			QUnit.test( "setRGB", ( assert ) => {

				var c = new Color();
				c.setRGB( 1, 0.2, 0.1 );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g == 0.2, "Green: " + c.g );
				assert.ok( c.b == 0.1, "Blue: " + c.b );

			} );

			QUnit.test( "lerp", ( assert ) => {

				var c = new Color();
				var c2 = new Color();
				c.setRGB( 0, 0, 0 );
				c.lerp( c2, 0.2 );
				assert.ok( c.r == 0.2, "Red: " + c.r );
				assert.ok( c.g == 0.2, "Green: " + c.g );
				assert.ok( c.b == 0.2, "Blue: " + c.b );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Color( 0.5, 0.0, 1.0 );
				var b = new Color( 0.5, 1.0, 0.0 );

				assert.strictEqual( a.r, b.r, "Components: r is equal" );
				assert.notStrictEqual( a.g, b.g, "Components: g is not equal" );
				assert.notStrictEqual( a.b, b.b, "Components: b is not equal" );

				assert.notOk( a.equals( b ), "equals(): a not equal b" );
				assert.notOk( b.equals( a ), "equals(): b not equal a" );

				a.copy( b );
				assert.strictEqual( a.r, b.r, "Components after copy(): r is equal" );
				assert.strictEqual( a.g, b.g, "Components after copy(): g is equal" );
				assert.strictEqual( a.b, b.b, "Components after copy(): b is equal" );

				assert.ok( a.equals( b ), "equals() after copy(): a equals b" );
				assert.ok( b.equals( a ), "equals() after copy(): b equals a" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				var a = new Color();
				var array = [ 0.5, 0.6, 0.7, 0, 1, 0 ];

				a.fromArray( array );
				assert.strictEqual( a.r, 0.5, "No offset: check r" );
				assert.strictEqual( a.g, 0.6, "No offset: check g" );
				assert.strictEqual( a.b, 0.7, "No offset: check b" );

				a.fromArray( array, 3 );
				assert.strictEqual( a.r, 0, "With offset: check r" );
				assert.strictEqual( a.g, 1, "With offset: check g" );
				assert.strictEqual( a.b, 0, "With offset: check b" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var r = 0.5, g = 1.0, b = 0.0;
				var a = new Color( r, g, b );

				var array = a.toArray();
				assert.strictEqual( array[ 0 ], r, "No array, no offset: check r" );
				assert.strictEqual( array[ 1 ], g, "No array, no offset: check g" );
				assert.strictEqual( array[ 2 ], b, "No array, no offset: check b" );

				var array = [];
				a.toArray( array );
				assert.strictEqual( array[ 0 ], r, "With array, no offset: check r" );
				assert.strictEqual( array[ 1 ], g, "With array, no offset: check g" );
				assert.strictEqual( array[ 2 ], b, "With array, no offset: check b" );

				var array = [];
				a.toArray( array, 1 );
				assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
				assert.strictEqual( array[ 1 ], r, "With array and offset: check r" );
				assert.strictEqual( array[ 2 ], g, "With array and offset: check g" );
				assert.strictEqual( array[ 3 ], b, "With array and offset: check b" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				var a = new Color( 0.0, 0.0, 0.0 );
				var b = new Color( 0.0, 0.5, 0.0 );
				var c = new Color( 1.0, 0.0, 0.0 );
				var d = new Color( 1.0, 1.0, 1.0 );

				assert.strictEqual( a.toJSON(), 0x000000, "Check black" );
				assert.strictEqual( b.toJSON(), 0x007F00, "Check half-blue" );
				assert.strictEqual( c.toJSON(), 0xFF0000, "Check red" );
				assert.strictEqual( d.toJSON(), 0xFFFFFF, "Check white" );

			} );

			// OTHERS
			QUnit.test( "setWithNum", ( assert ) => {

				var c = new Color();
				c.set( 0xFF0000 );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setWithString", ( assert ) => {

				var c = new Color();
				c.set( 'silver' );
				assert.ok( c.getHex() == 0xC0C0C0, "Hex c: " + c.getHex() );

			} );

			QUnit.test( "setStyleRGBRed", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgb(255,0,0)' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBARed", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgba(255,0,0,0.5)' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBRedWithSpaces", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgb( 255 , 0,   0 )' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBARedWithSpaces", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgba( 255,  0,  0  , 1 )' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBPercent", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgb(100%,50%,10%)' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g == 0.5, "Green: " + c.g );
				assert.ok( c.b == 0.1, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBAPercent", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgba(100%,50%,10%, 0.5)' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g == 0.5, "Green: " + c.g );
				assert.ok( c.b == 0.1, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBPercentWithSpaces", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgb( 100% ,50%  , 10% )' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g == 0.5, "Green: " + c.g );
				assert.ok( c.b == 0.1, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleRGBAPercentWithSpaces", ( assert ) => {

				var c = new Color();
				c.setStyle( 'rgba( 100% ,50%  ,  10%, 0.5 )' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g == 0.5, "Green: " + c.g );
				assert.ok( c.b == 0.1, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleHSLRed", ( assert ) => {

				var c = new Color();
				c.setStyle( 'hsl(360,100%,50%)' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleHSLARed", ( assert ) => {

				var c = new Color();
				c.setStyle( 'hsla(360,100%,50%,0.5)' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleHSLRedWithSpaces", ( assert ) => {

				var c = new Color();
				c.setStyle( 'hsl(360,  100% , 50% )' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleHSLARedWithSpaces", ( assert ) => {

				var c = new Color();
				c.setStyle( 'hsla( 360,  100% , 50%,  0.5 )' );
				assert.ok( c.r == 1, "Red: " + c.r );
				assert.ok( c.g === 0, "Green: " + c.g );
				assert.ok( c.b === 0, "Blue: " + c.b );

			} );

			QUnit.test( "setStyleHexSkyBlue", ( assert ) => {

				var c = new Color();
				c.setStyle( '#87CEEB' );
				assert.ok( c.getHex() == 0x87CEEB, "Hex c: " + c.getHex() );

			} );

			QUnit.test( "setStyleHexSkyBlueMixed", ( assert ) => {

				var c = new Color();
				c.setStyle( '#87cEeB' );
				assert.ok( c.getHex() == 0x87CEEB, "Hex c: " + c.getHex() );

			} );

			QUnit.test( "setStyleHex2Olive", ( assert ) => {

				var c = new Color();
				c.setStyle( '#F00' );
				assert.ok( c.getHex() == 0xFF0000, "Hex c: " + c.getHex() );

			} );

			QUnit.test( "setStyleHex2OliveMixed", ( assert ) => {

				var c = new Color();
				c.setStyle( '#f00' );
				assert.ok( c.getHex() == 0xFF0000, "Hex c: " + c.getHex() );

			} );

			QUnit.test( "setStyleColorName", ( assert ) => {

				var c = new Color();
				c.setStyle( 'powderblue' );
				assert.ok( c.getHex() == 0xB0E0E6, "Hex c: " + c.getHex() );

			} );


		} );

	} );

	/**
	 * @author Mugen87 / https://github.com/Mugen87
	 *
	 * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
	 *
	 */

	function Cylindrical( radius, theta, y ) {

		this.radius = ( radius !== undefined ) ? radius : 1.0; // distance from the origin to a point in the x-z plane
		this.theta = ( theta !== undefined ) ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis
		this.y = ( y !== undefined ) ? y : 0; // height above the x-z plane

		return this;

	}

	Object.assign( Cylindrical.prototype, {

		set: function ( radius, theta, y ) {

			this.radius = radius;
			this.theta = theta;
			this.y = y;

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( other ) {

			this.radius = other.radius;
			this.theta = other.theta;
			this.y = other.y;

			return this;

		},

		setFromVector3: function ( vec3 ) {

			this.radius = Math.sqrt( vec3.x * vec3.x + vec3.z * vec3.z );
			this.theta = Math.atan2( vec3.x, vec3.z );
			this.y = vec3.y;

			return this;

		}

	} );

	/**
	 * @author moraxy / https://github.com/moraxy
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Cylindrical', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Cylindrical();
				var radius = 10.0;
				var theta = Math.PI;
				var y$$1 = 5;

				assert.strictEqual( a.radius, 1.0, "Default values: check radius" );
				assert.strictEqual( a.theta, 0, "Default values: check theta" );
				assert.strictEqual( a.y, 0, "Default values: check y" );

				var a = new Cylindrical( radius, theta, y$$1 );
				assert.strictEqual( a.radius, radius, "Custom values: check radius" );
				assert.strictEqual( a.theta, theta, "Custom values: check theta" );
				assert.strictEqual( a.y, y$$1, "Custom values: check y" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Cylindrical();
				var radius = 10.0;
				var theta = Math.PI;
				var y$$1 = 5;

				a.set( radius, theta, y$$1 );
				assert.strictEqual( a.radius, radius, "Check radius" );
				assert.strictEqual( a.theta, theta, "Check theta" );
				assert.strictEqual( a.y, y$$1, "Check y" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var radius = 10.0;
				var theta = Math.PI;
				var y$$1 = 5;
				var a = new Cylindrical( radius, theta, y$$1 );
				var b = a.clone();

				assert.propEqual( a, b, "Check a and b are equal after clone()" );

				a.radius = 1;
				assert.notPropEqual( a, b, "Check a and b are not equal after modification" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var radius = 10.0;
				var theta = Math.PI;
				var y$$1 = 5;
				var a = new Cylindrical( radius, theta, y$$1 );
				var b = new Cylindrical().copy( a );

				assert.propEqual( a, b, "Check a and b are equal after copy()" );

				a.radius = 1;
				assert.notPropEqual( a, b, "Check a and b are not equal after modification" );

			} );

			QUnit.test( "setFromVector3", ( assert ) => {

				var a = new Cylindrical( 1, 1, 1 );
				var b = new Vector3( 0, 0, 0 );
				var c = new Vector3( 3, - 1, - 3 );
				var expected = new Cylindrical( Math.sqrt( 9 + 9 ), Math.atan2( 3, - 3 ), - 1 );

				a.setFromVector3( b );
				assert.strictEqual( a.radius, 0, "Zero-length vector: check radius" );
				assert.strictEqual( a.theta, 0, "Zero-length vector: check theta" );
				assert.strictEqual( a.y, 0, "Zero-length vector: check y" );

				a.setFromVector3( c );
				assert.ok( Math.abs( a.radius - expected.radius ) <= eps, "Normal vector: check radius" );
				assert.ok( Math.abs( a.theta - expected.theta ) <= eps, "Normal vector: check theta" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Normal vector: check y" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */
	const eulerZero = new Euler( 0, 0, 0, "XYZ" );
	const eulerAxyz = new Euler( 1, 0, 0, "XYZ" );
	const eulerAzyx = new Euler( 0, 1, 0, "ZYX" );

	function matrixEquals4( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;
		if ( a.elements.length != b.elements.length ) {

			return false;

		}

		for ( var i = 0, il = a.elements.length; i < il; i ++ ) {

			var delta = a.elements[ i ] - b.elements[ i ];
			if ( delta > tolerance ) {

				return false;

			}

		}

		return true;

	}

	function eulerEquals( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;
		var diff = Math.abs( a.x - b.x ) + Math.abs( a.y - b.y ) + Math.abs( a.z - b.z );

		return ( diff < tolerance );

	}

	function quatEquals( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;
		var diff = Math.abs( a.x - b.x ) + Math.abs( a.y - b.y ) + Math.abs( a.z - b.z ) + Math.abs( a.w - b.w );

		return ( diff < tolerance );

	}

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Euler', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Euler();
				assert.ok( a.equals( eulerZero ), "Passed!" );
				assert.ok( ! a.equals( eulerAxyz ), "Passed!" );
				assert.ok( ! a.equals( eulerAzyx ), "Passed!" );

			} );

			// STATIC STUFF
			QUnit.test( "RotationOrders", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "DefaultOrder", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES STUFF
			QUnit.test( "x", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "y", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "z", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "order", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isEuler", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set/setFromVector3/toVector3", ( assert ) => {

				var a = new Euler();

				a.set( 0, 1, 0, "ZYX" );
				assert.ok( a.equals( eulerAzyx ), "Passed!" );
				assert.ok( ! a.equals( eulerAxyz ), "Passed!" );
				assert.ok( ! a.equals( eulerZero ), "Passed!" );

				var vec = new Vector3( 0, 1, 0 );

				var b = new Euler().setFromVector3( vec, "ZYX" );
				assert.ok( a.equals( b ), "Passed!" );

				var c = b.toVector3();
				assert.ok( c.equals( vec ), "Passed!" );

			} );

			QUnit.test( "clone/copy/equals", ( assert ) => {

				var a = eulerAxyz.clone();
				assert.ok( a.equals( eulerAxyz ), "Passed!" );
				assert.ok( ! a.equals( eulerZero ), "Passed!" );
				assert.ok( ! a.equals( eulerAzyx ), "Passed!" );

				a.copy( eulerAzyx );
				assert.ok( a.equals( eulerAzyx ), "Passed!" );
				assert.ok( ! a.equals( eulerAxyz ), "Passed!" );
				assert.ok( ! a.equals( eulerZero ), "Passed!" );

			} );

			QUnit.test( "Quaternion.setFromEuler/Euler.fromQuaternion", ( assert ) => {

				var testValues = [ eulerZero, eulerAxyz, eulerAzyx ];
				for ( var i = 0; i < testValues.length; i ++ ) {

					var v = testValues[ i ];
					var q = new Quaternion().setFromEuler( v );

					var v2 = new Euler().setFromQuaternion( q, v.order );
					var q2 = new Quaternion().setFromEuler( v2 );
					assert.ok( quatEquals( q, q2 ), "Passed!" );

				}

			} );

			QUnit.test( "Matrix4.setFromEuler/Euler.fromRotationMatrix", ( assert ) => {

				var testValues = [ eulerZero, eulerAxyz, eulerAzyx ];
				for ( var i = 0; i < testValues.length; i ++ ) {

					var v = testValues[ i ];
					var m = new Matrix4().makeRotationFromEuler( v );

					var v2 = new Euler().setFromRotationMatrix( m, v.order );
					var m2 = new Matrix4().makeRotationFromEuler( v2 );
					assert.ok( matrixEquals4( m, m2, 0.0001 ), "Passed!" );

				}

			} );

			QUnit.test( "reorder", ( assert ) => {

				var testValues = [ eulerZero, eulerAxyz, eulerAzyx ];
				for ( var i = 0; i < testValues.length; i ++ ) {

					var v = testValues[ i ];
					var q = new Quaternion().setFromEuler( v );

					v.reorder( 'YZX' );
					var q2 = new Quaternion().setFromEuler( v );
					assert.ok( quatEquals( q, q2 ), "Passed!" );

					v.reorder( 'ZXY' );
					var q3 = new Quaternion().setFromEuler( v );
					assert.ok( quatEquals( q, q3 ), "Passed!" );

				}

			} );

			QUnit.test( "set/get properties, check callbacks", ( assert ) => {

				var a = new Euler();
				a.onChange( function () {

					assert.step( "set: onChange called" );

				} );

				assert.expect( 8 );

				// should be 4 calls to onChangeCallback
				a.x = 1;
				a.y = 2;
				a.z = 3;
				a.order = "ZYX";

				assert.strictEqual( a.x, 1, "get: check x" );
				assert.strictEqual( a.y, 2, "get: check y" );
				assert.strictEqual( a.z, 3, "get: check z" );
				assert.strictEqual( a.order, "ZYX", "get: check order" );

			} );

			QUnit.test( "clone/copy, check callbacks", ( assert ) => {

				assert.expect( 3 );

				var a = new Euler( 1, 2, 3, "ZXY" );
				var b = new Euler( 4, 5, 6, "XZY" );
				var cb = function () {

					assert.step( "onChange called" );

				};
				a.onChange( cb );
				b.onChange( cb );

				// clone doesn't trigger onChange
				var a = b.clone();
				assert.ok( a.equals( b ), "clone: check if a equals b" );

				// copy triggers onChange once
				var a = new Euler( 1, 2, 3, "ZXY" );
				a.onChange( cb );
				a.copy( b );
				assert.ok( a.equals( b ), "copy: check if a equals b" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var order = "YXZ";
				var a = new Euler( x, y, z, order );

				var array = a.toArray();
				assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "No array, no offset: check z" );
				assert.strictEqual( array[ 3 ], order, "No array, no offset: check order" );

				var array = [];
				a.toArray( array );
				assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "With array, no offset: check z" );
				assert.strictEqual( array[ 3 ], order, "With array, no offset: check order" );

				var array = [];
				a.toArray( array, 1 );
				assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
				assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
				assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );
				assert.strictEqual( array[ 3 ], z, "With array and offset: check z" );
				assert.strictEqual( array[ 4 ], order, "With array and offset: check order" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				assert.expect( 10 );

				var a = new Euler();
				var array = [ x, y, z ];
				var cb = function () {

					assert.step( "onChange called" );

				};
				a.onChange( cb );

				a.fromArray( array );
				assert.strictEqual( a.x, x, "No order: check x" );
				assert.strictEqual( a.y, y, "No order: check y" );
				assert.strictEqual( a.z, z, "No order: check z" );
				assert.strictEqual( a.order, "XYZ", "No order: check order" );

				var a = new Euler();
				var array = [ x, y, z, "ZXY" ];
				a.onChange( cb );
				a.fromArray( array );
				assert.strictEqual( a.x, x, "With order: check x" );
				assert.strictEqual( a.y, y, "With order: check y" );
				assert.strictEqual( a.z, z, "With order: check z" );
				assert.strictEqual( a.order, "ZXY", "With order: check order" );

			} );

			QUnit.test( "onChange", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onChangeCallback", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "gimbalLocalQuat", ( assert ) => {

				// known problematic quaternions
				var q1 = new Quaternion( 0.5207769385244341, - 0.4783214164122354, 0.520776938524434, 0.47832141641223547 );
				var q2 = new Quaternion( 0.11284905712620674, 0.6980437630368944, - 0.11284905712620674, 0.6980437630368944 );

				var eulerOrder = "ZYX";

				// create Euler directly from a Quaternion
				var eViaQ1 = new Euler().setFromQuaternion( q1, eulerOrder ); // there is likely a bug here

				// create Euler from Quaternion via an intermediate Matrix4
				var mViaQ1 = new Matrix4().makeRotationFromQuaternion( q1 );
				var eViaMViaQ1 = new Euler().setFromRotationMatrix( mViaQ1, eulerOrder );

				// the results here are different
				assert.ok( eulerEquals( eViaQ1, eViaMViaQ1 ), "Passed!" ); // this result is correct

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	const unit3 = new Vector3( 1, 0, 0 );

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Frustum', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Frustum();

				assert.ok( a.planes !== undefined, "Passed!" );
				assert.ok( a.planes.length === 6, "Passed!" );

				var pDefault = new Plane();
				for ( var i = 0; i < 6; i ++ ) {

					assert.ok( a.planes[ i ].equals( pDefault ), "Passed!" );

				}

				var p0 = new Plane( unit3, - 1 );
				var p1 = new Plane( unit3, 1 );
				var p2 = new Plane( unit3, 2 );
				var p3 = new Plane( unit3, 3 );
				var p4 = new Plane( unit3, 4 );
				var p5 = new Plane( unit3, 5 );

				var a = new Frustum( p0, p1, p2, p3, p4, p5 );
				assert.ok( a.planes[ 0 ].equals( p0 ), "Passed!" );
				assert.ok( a.planes[ 1 ].equals( p1 ), "Passed!" );
				assert.ok( a.planes[ 2 ].equals( p2 ), "Passed!" );
				assert.ok( a.planes[ 3 ].equals( p3 ), "Passed!" );
				assert.ok( a.planes[ 4 ].equals( p4 ), "Passed!" );
				assert.ok( a.planes[ 5 ].equals( p5 ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Frustum();
				var p0 = new Plane( unit3, - 1 );
				var p1 = new Plane( unit3, 1 );
				var p2 = new Plane( unit3, 2 );
				var p3 = new Plane( unit3, 3 );
				var p4 = new Plane( unit3, 4 );
				var p5 = new Plane( unit3, 5 );

				a.set( p0, p1, p2, p3, p4, p5 );

				assert.ok( a.planes[ 0 ].equals( p0 ), "Check plane #0" );
				assert.ok( a.planes[ 1 ].equals( p1 ), "Check plane #1" );
				assert.ok( a.planes[ 2 ].equals( p2 ), "Check plane #2" );
				assert.ok( a.planes[ 3 ].equals( p3 ), "Check plane #3" );
				assert.ok( a.planes[ 4 ].equals( p4 ), "Check plane #4" );
				assert.ok( a.planes[ 5 ].equals( p5 ), "Check plane #5" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var p0 = new Plane( unit3, - 1 );
				var p1 = new Plane( unit3, 1 );
				var p2 = new Plane( unit3, 2 );
				var p3 = new Plane( unit3, 3 );
				var p4 = new Plane( unit3, 4 );
				var p5 = new Plane( unit3, 5 );

				var b = new Frustum( p0, p1, p2, p3, p4, p5 );
				var a = b.clone();
				assert.ok( a.planes[ 0 ].equals( p0 ), "Passed!" );
				assert.ok( a.planes[ 1 ].equals( p1 ), "Passed!" );
				assert.ok( a.planes[ 2 ].equals( p2 ), "Passed!" );
				assert.ok( a.planes[ 3 ].equals( p3 ), "Passed!" );
				assert.ok( a.planes[ 4 ].equals( p4 ), "Passed!" );
				assert.ok( a.planes[ 5 ].equals( p5 ), "Passed!" );

				// ensure it is a true copy by modifying source
				a.planes[ 0 ].copy( p1 );
				assert.ok( b.planes[ 0 ].equals( p0 ), "Passed!" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var p0 = new Plane( unit3, - 1 );
				var p1 = new Plane( unit3, 1 );
				var p2 = new Plane( unit3, 2 );
				var p3 = new Plane( unit3, 3 );
				var p4 = new Plane( unit3, 4 );
				var p5 = new Plane( unit3, 5 );

				var b = new Frustum( p0, p1, p2, p3, p4, p5 );
				var a = new Frustum().copy( b );
				assert.ok( a.planes[ 0 ].equals( p0 ), "Passed!" );
				assert.ok( a.planes[ 1 ].equals( p1 ), "Passed!" );
				assert.ok( a.planes[ 2 ].equals( p2 ), "Passed!" );
				assert.ok( a.planes[ 3 ].equals( p3 ), "Passed!" );
				assert.ok( a.planes[ 4 ].equals( p4 ), "Passed!" );
				assert.ok( a.planes[ 5 ].equals( p5 ), "Passed!" );

				// ensure it is a true copy by modifying source
				b.planes[ 0 ] = p1;
				assert.ok( a.planes[ 0 ].equals( p0 ), "Passed!" );

			} );

			QUnit.test( "setFromMatrix/makeOrthographic/containsPoint", ( assert ) => {

				var m = new Matrix4().makeOrthographic( - 1, 1, - 1, 1, 1, 100 );
				var a = new Frustum().setFromMatrix( m );

				assert.ok( ! a.containsPoint( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 0, 0, - 50 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 0, 0, - 1.001 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( - 1, - 1, - 1.001 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( - 1.1, - 1.1, - 1.001 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 1, 1, - 1.001 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( 1.1, 1.1, - 1.001 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 0, 0, - 100 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( - 1, - 1, - 100 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( - 1.1, - 1.1, - 100.1 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 1, 1, - 100 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( 1.1, 1.1, - 100.1 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( 0, 0, - 101 ) ), "Passed!" );

			} );

			QUnit.test( "setFromMatrix/makePerspective/containsPoint", ( assert ) => {

				var m = new Matrix4().makePerspective( - 1, 1, 1, - 1, 1, 100 );
				var a = new Frustum().setFromMatrix( m );

				assert.ok( ! a.containsPoint( new Vector3( 0, 0, 0 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 0, 0, - 50 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 0, 0, - 1.001 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( - 1, - 1, - 1.001 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( - 1.1, - 1.1, - 1.001 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 1, 1, - 1.001 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( 1.1, 1.1, - 1.001 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 0, 0, - 99.999 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( - 99.999, - 99.999, - 99.999 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( - 100.1, - 100.1, - 100.1 ) ), "Passed!" );
				assert.ok( a.containsPoint( new Vector3( 99.999, 99.999, - 99.999 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( 100.1, 100.1, - 100.1 ) ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( 0, 0, - 101 ) ), "Passed!" );

			} );

			QUnit.test( "setFromMatrix/makePerspective/intersectsSphere", ( assert ) => {

				var m = new Matrix4().makePerspective( - 1, 1, 1, - 1, 1, 100 );
				var a = new Frustum().setFromMatrix( m );

				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( 0, 0, 0 ), 0 ) ), "Passed!" );
				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( 0, 0, 0 ), 0.9 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 0, 0, 0 ), 1.1 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 0, 0, - 50 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 0, 0, - 1.001 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( - 1, - 1, - 1.001 ), 0 ) ), "Passed!" );
				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( - 1.1, - 1.1, - 1.001 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( - 1.1, - 1.1, - 1.001 ), 0.5 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 1, 1, - 1.001 ), 0 ) ), "Passed!" );
				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( 1.1, 1.1, - 1.001 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 1.1, 1.1, - 1.001 ), 0.5 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 0, 0, - 99.999 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( - 99.999, - 99.999, - 99.999 ), 0 ) ), "Passed!" );
				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( - 100.1, - 100.1, - 100.1 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( - 100.1, - 100.1, - 100.1 ), 0.5 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 99.999, 99.999, - 99.999 ), 0 ) ), "Passed!" );
				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( 100.1, 100.1, - 100.1 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 100.1, 100.1, - 100.1 ), 0.2 ) ), "Passed!" );
				assert.ok( ! a.intersectsSphere( new Sphere( new Vector3( 0, 0, - 101 ), 0 ) ), "Passed!" );
				assert.ok( a.intersectsSphere( new Sphere( new Vector3( 0, 0, - 101 ), 1.1 ) ), "Passed!" );

			} );

			QUnit.test( "intersectsObject", ( assert ) => {

				var m = new Matrix4().makePerspective( - 1, 1, 1, - 1, 1, 100 );
				var a = new Frustum().setFromMatrix( m );
				var object = new Mesh( new BoxGeometry( 1, 1, 1 ) );
				var intersects;

				intersects = a.intersectsObject( object );
				assert.notOk( intersects, "No intersection" );

				object.position.set( - 1, - 1, - 1 );
				object.updateMatrixWorld();

				intersects = a.intersectsObject( object );
				assert.ok( intersects, "Successful intersection" );

				object.position.set( 1, 1, 1 );
				object.updateMatrixWorld();

				intersects = a.intersectsObject( object );
				assert.notOk( intersects, "No intersection" );

			} );

			QUnit.test( "intersectsSprite", ( assert ) => {

				var m = new Matrix4().makePerspective( - 1, 1, 1, - 1, 1, 100 );
				var a = new Frustum().setFromMatrix( m );
				var sprite = new Sprite();
				var intersects;

				intersects = a.intersectsSprite( sprite );
				assert.notOk( intersects, "No intersection" );

				sprite.position.set( - 1, - 1, - 1 );
				sprite.updateMatrixWorld();

				intersects = a.intersectsSprite( sprite );
				assert.ok( intersects, "Successful intersection" );

			} );

			QUnit.test( "intersectsSphere", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "intersectsBox", ( assert ) => {

				var m = new Matrix4().makePerspective( - 1, 1, 1, - 1, 1, 100 );
				var a = new Frustum().setFromMatrix( m );
				var box = new Box3( zero3.clone(), one3.clone() );
				var intersects;

				intersects = a.intersectsBox( box );
				assert.notOk( intersects, "No intersection" );

				box.translate( - 1, - 1, - 1 );

				intersects = a.intersectsBox( box );
				assert.ok( intersects, "Successful intersection" );

			} );

			QUnit.test( "containsPoint", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author tschw
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Interpolant', () => {

			// Since this is an abstract base class, we have to make it concrete in order
			// to QUnit.test its functionality...

			function Mock( parameterPositions, sampleValues, sampleSize, resultBuffer ) {

				Interpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );

			}

			Mock.prototype = Object.create( Interpolant.prototype );

			Mock.prototype.intervalChanged_ = function intervalChanged( i1, t0, t1 ) {

				Mock.captureCall( arguments );

			};

			Mock.prototype.interpolate_ = function interpolate( i1, t0, t, t1 ) {

				Mock.captureCall( arguments );
				return this.copySampleValue_( i1 - 1 );

			};

			Mock.prototype.beforeStart_ = function beforeStart( i, t, t0 ) {

				Mock.captureCall( arguments );
				return this.copySampleValue_( i );

			};

			Mock.prototype.afterEnd_ = function afterEnd( i, tN, t ) {

				Mock.captureCall( arguments );
				return this.copySampleValue_( i );

			};

			// Call capturing facility

			Mock.calls = null;

			Mock.captureCall = function ( args ) {

				if ( Mock.calls !== null ) {

					Mock.calls.push( {
						func: Mock.captureCall.caller.name,
						args: Array.prototype.slice.call( args )
					} );

				}

			};

			// Tests

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "evaluate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PRIVATE STUFF
			QUnit.test( "DefaultSettings_", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getSettings_", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copySampleValue_", ( assert ) => {

				var interpolant = new Mock( null, [ 1, 11, 2, 22, 3, 33 ], 2, [] );

				assert.deepEqual( interpolant.copySampleValue_( 0 ), [ 1, 11 ], "sample fetch (0)" );
				assert.deepEqual( interpolant.copySampleValue_( 1 ), [ 2, 22 ], "sample fetch (1)" );
				assert.deepEqual( interpolant.copySampleValue_( 2 ), [ 3, 33 ], "first sample (2)" );

			} );

			QUnit.test( "evaluate -> intervalChanged_ / interpolate_", ( assert ) => {

				var actual, expect;

				var interpolant = new Mock( [ 11, 22, 33, 44, 55, 66, 77, 88, 99 ], null, 0, null );

				Mock.calls = [];
				interpolant.evaluate( 11 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 1, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 12 ); // same interval

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 12, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 22 ); // step forward

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 2, 22, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 2, 22, 22, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2 );

				Mock.calls = [];
				interpolant.evaluate( 21 ); // step back

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 1, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 21, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 20 ); // same interval

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 20, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 43 ); // two steps forward

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 3, 33, 44 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 3, 33, 43, 44 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 12 ); // two steps back

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 1, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 12, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 77 ); // random access

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 7, 77, 88 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 7, 77, 77, 88 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 80 ); // same interval

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'interpolate',
					args: [ 7, 77, 80, 88 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 36 ); // random access

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 3, 33, 44 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 3, 33, 36, 44 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 24 ); // fast reset / loop (2nd)

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 2, 22, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 2, 22, 24, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				Mock.calls = [];
				interpolant.evaluate( 16 ); // fast reset / loop (2nd)

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 1, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 16, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

			} );

			QUnit.test( "evaulate -> beforeStart_ [once]", ( assert ) => {

				var actual, expect;

				var interpolant = new Mock( [ 11, 22, 33 ], null, 0, null );

				Mock.calls = [];
				interpolant.evaluate( 10 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'beforeStart',
					args: [ 0, 10, 11 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				// Check operation resumes normally and intervalChanged gets called
				Mock.calls = [];
				interpolant.evaluate( 11 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 1, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				// Back off-bounds
				Mock.calls = [];
				interpolant.evaluate( 10 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'beforeStart',
					args: [ 0, 10, 11 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

			} );

			QUnit.test( "evaluate -> beforeStart_ [twice]", ( assert ) => {

				var actual, expect;

				var interpolant = new Mock( [ 11, 22, 33 ], null, 0, null );

				Mock.calls = [];
				interpolant.evaluate( 10 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'beforeStart',
					args: [ 0, 10, 11 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				Mock.calls = []; // again - consider changed state
				interpolant.evaluate( 10 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'beforeStart',
					args: [ 0, 10, 11 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				// Check operation resumes normally and intervalChanged gets called
				Mock.calls = [];
				interpolant.evaluate( 11 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 1, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 1, 11, 11, 22 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

			} );

			QUnit.test( "evaluate -> afterEnd_ [once]", ( assert ) => {

				var actual, expect;

				var interpolant = new Mock( [ 11, 22, 33 ], null, 0, null );

				Mock.calls = [];
				interpolant.evaluate( 33 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'afterEnd',
					args: [ 2, 33, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				// Check operation resumes normally and intervalChanged gets called
				Mock.calls = [];
				interpolant.evaluate( 32 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 2, 22, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 2, 22, 32, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

				// Back off-bounds
				Mock.calls = [];
				interpolant.evaluate( 33 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'afterEnd',
					args: [ 2, 33, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

			} );

			QUnit.test( "evaluate -> afterEnd_ [twice]", ( assert ) => {

				var actual, expect;

				var interpolant = new Mock( [ 11, 22, 33 ], null, 0, null );

				Mock.calls = [];
				interpolant.evaluate( 33 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'afterEnd',
					args: [ 2, 33, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				Mock.calls = []; // again - consider changed state
				interpolant.evaluate( 33 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'afterEnd',
					args: [ 2, 33, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 1, "no further calls" );

				// Check operation resumes normally and intervalChanged gets called
				Mock.calls = [];
				interpolant.evaluate( 32 );

				actual = Mock.calls[ 0 ];
				expect = {
					func: 'intervalChanged',
					args: [ 2, 22, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				actual = Mock.calls[ 1 ];
				expect = {
					func: 'interpolate',
					args: [ 2, 22, 32, 33 ]
				};
				assert.deepEqual( actual, expect, JSON.stringify( expect ) );

				assert.ok( Mock.calls.length === 2, "no further calls" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Line3', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Line3();
				assert.ok( a.start.equals( zero3 ), "Passed!" );
				assert.ok( a.end.equals( zero3 ), "Passed!" );

				var a = new Line3( two3.clone(), one3.clone() );
				assert.ok( a.start.equals( two3 ), "Passed!" );
				assert.ok( a.end.equals( one3 ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Line3();

				a.set( one3, one3 );
				assert.ok( a.start.equals( one3 ), "Passed!" );
				assert.ok( a.end.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "copy/equals", ( assert ) => {

				var a = new Line3( zero3.clone(), one3.clone() );
				var b = new Line3().copy( a );
				assert.ok( b.start.equals( zero3 ), "Passed!" );
				assert.ok( b.end.equals( one3 ), "Passed!" );

				// ensure that it is a true copy
				a.start = zero3;
				a.end = one3;
				assert.ok( b.start.equals( zero3 ), "Passed!" );
				assert.ok( b.end.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "clone/equal", ( assert ) => {

				var a = new Line3();
				var b = new Line3( zero3, new Vector3( 1, 1, 1 ) );
				var c = new Line3( zero3, new Vector3( 1, 1, 0 ) );

				assert.notOk( a.equals( b ), "Check a and b aren't equal" );
				assert.notOk( a.equals( c ), "Check a and c aren't equal" );
				assert.notOk( b.equals( c ), "Check b and c aren't equal" );

				var a = b.clone();
				assert.ok( a.equals( b ), "Check a and b are equal after clone()" );
				assert.notOk( a.equals( c ), "Check a and c aren't equal after clone()" );

				a.set( zero3, zero3 );
				assert.notOk( a.equals( b ), "Check a and b are not equal after modification" );

			} );

			QUnit.test( "getCenter", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "delta", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "distanceSq", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "distance", ( assert ) => {

				var a = new Line3( zero3, zero3 );
				var b = new Line3( zero3, one3 );
				var c = new Line3( one3.clone().negate(), one3 );
				var d = new Line3( two3.clone().multiplyScalar( - 2 ), two3.clone().negate() );

				assert.numEqual( a.distance(), 0, "Check distance for zero-length line" );
				assert.numEqual( b.distance(), Math.sqrt( 3 ), "Check distance for simple line" );
				assert.numEqual( c.distance(), Math.sqrt( 12 ), "Check distance for negative to positive endpoints" );
				assert.numEqual( d.distance(), Math.sqrt( 12 ), "Check distance for negative to negative endpoints" );

			} );

			QUnit.test( "at", ( assert ) => {

				var a = new Line3( one3.clone(), new Vector3( 1, 1, 2 ) );

				assert.ok( a.at( - 1 ).distanceTo( new Vector3( 1, 1, 0 ) ) < 0.0001, "Passed!" );
				assert.ok( a.at( 0 ).distanceTo( one3.clone() ) < 0.0001, "Passed!" );
				assert.ok( a.at( 1 ).distanceTo( new Vector3( 1, 1, 2 ) ) < 0.0001, "Passed!" );
				assert.ok( a.at( 2 ).distanceTo( new Vector3( 1, 1, 3 ) ) < 0.0001, "Passed!" );

			} );

			QUnit.test( "closestPointToPoint/closestPointToPointParameter", ( assert ) => {

				var a = new Line3( one3.clone(), new Vector3( 1, 1, 2 ) );

				// nearby the ray
				assert.ok( a.closestPointToPointParameter( zero3.clone(), true ) == 0, "Passed!" );
				var b1 = a.closestPointToPoint( zero3.clone(), true );
				assert.ok( b1.distanceTo( new Vector3( 1, 1, 1 ) ) < 0.0001, "Passed!" );

				// nearby the ray
				assert.ok( a.closestPointToPointParameter( zero3.clone(), false ) == - 1, "Passed!" );
				var b2 = a.closestPointToPoint( zero3.clone(), false );
				assert.ok( b2.distanceTo( new Vector3( 1, 1, 0 ) ) < 0.0001, "Passed!" );

				// nearby the ray
				assert.ok( a.closestPointToPointParameter( new Vector3( 1, 1, 5 ), true ) == 1, "Passed!" );
				var b = a.closestPointToPoint( new Vector3( 1, 1, 5 ), true );
				assert.ok( b.distanceTo( new Vector3( 1, 1, 2 ) ) < 0.0001, "Passed!" );

				// exactly on the ray
				assert.ok( a.closestPointToPointParameter( one3.clone(), true ) == 0, "Passed!" );
				var c = a.closestPointToPoint( one3.clone(), true );
				assert.ok( c.distanceTo( one3.clone() ) < 0.0001, "Passed!" );

			} );

			QUnit.test( "applyMatrix4", ( assert ) => {

				var a = new Line3( zero3.clone(), two3.clone() );
				var b = new Vector4( two3.x, two3.y, two3.z, 1 );
				var m = new Matrix4().makeTranslation( x, y, z );
				var v = new Vector3( x, y, z );

				a.applyMatrix4( m );
				assert.ok( a.start.equals( v ), "Translation: check start" );
				assert.ok( a.end.equals( new Vector3( 2 + x, 2 + y, 2 + z ) ), "Translation: check start" );

				// reset starting conditions
				a.set( zero3.clone(), two3.clone() );
				m.makeRotationX( Math.PI );

				a.applyMatrix4( m );
				b.applyMatrix4( m );

				assert.ok( a.start.equals( zero3 ), "Rotation: check start" );
				assert.numEqual( a.end.x, b.x / b.w, "Rotation: check end.x" );
				assert.numEqual( a.end.y, b.y / b.w, "Rotation: check end.y" );
				assert.numEqual( a.end.z, b.z / b.w, "Rotation: check end.z" );

				// reset starting conditions
				a.set( zero3.clone(), two3.clone() );
				b.set( two3.x, two3.y, two3.z, 1 );
				m.setPosition( v );

				a.applyMatrix4( m );
				b.applyMatrix4( m );

				assert.ok( a.start.equals( v ), "Both: check start" );
				assert.numEqual( a.end.x, b.x / b.w, "Both: check end.x" );
				assert.numEqual( a.end.y, b.y / b.w, "Both: check end.y" );
				assert.numEqual( a.end.z, b.z / b.w, "Both: check end.z" );

			} );

			QUnit.test( "equals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author humbletim / https://github.com/humbletim
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Math', () => {

			// PUBLIC STUFF
			QUnit.test( "generateUUID", ( assert ) => {

				var a = _Math.generateUUID();
				var regex = /[A-Z0-9]{8}-[A-Z0-9]{4}-4[A-Z0-9]{3}-[A-Z0-9]{4}-[A-Z0-9]{12}/i;
				// note the fixed '4' here ----------^

				assert.ok( regex.test( a ), "Generated UUID matches the expected pattern" );

			} );

			QUnit.test( "clamp", ( assert ) => {

				assert.strictEqual( _Math.clamp( 0.5, 0, 1 ), 0.5, "Value already within limits" );
				assert.strictEqual( _Math.clamp( 0, 0, 1 ), 0, "Value equal to one limit" );
				assert.strictEqual( _Math.clamp( - 0.1, 0, 1 ), 0, "Value too low" );
				assert.strictEqual( _Math.clamp( 1.1, 0, 1 ), 1, "Value too high" );

			} );

			QUnit.test( "euclideanModulo", ( assert ) => {

				assert.ok( isNaN( _Math.euclideanModulo( 6, 0 ) ), "Division by zero returns NaN" );
				assert.strictEqual( _Math.euclideanModulo( 6, 1 ), 0, "Divison by trivial divisor" );
				assert.strictEqual( _Math.euclideanModulo( 6, 2 ), 0, "Divison by non-trivial divisor" );
				assert.strictEqual( _Math.euclideanModulo( 6, 5 ), 1, "Divison by itself - 1" );
				assert.strictEqual( _Math.euclideanModulo( 6, 6 ), 0, "Divison by itself" );
				assert.strictEqual( _Math.euclideanModulo( 6, 7 ), 6, "Divison by itself + 1" );

			} );

			QUnit.test( "mapLinear", ( assert ) => {

				assert.strictEqual( _Math.mapLinear( 0.5, 0, 1, 0, 10 ), 5, "Value within range" );
				assert.strictEqual( _Math.mapLinear( 0.0, 0, 1, 0, 10 ), 0, "Value equal to lower boundary" );
				assert.strictEqual( _Math.mapLinear( 1.0, 0, 1, 0, 10 ), 10, "Value equal to upper boundary" );

			} );

			QUnit.test( "lerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "smoothstep", ( assert ) => {

				assert.strictEqual( _Math.smoothstep( - 1, 0, 2 ), 0, "Value lower than minimum" );
				assert.strictEqual( _Math.smoothstep( 0, 0, 2 ), 0, "Value equal to minimum" );
				assert.strictEqual( _Math.smoothstep( 0.5, 0, 2 ), 0.15625, "Value within limits" );
				assert.strictEqual( _Math.smoothstep( 1, 0, 2 ), 0.5, "Value within limits" );
				assert.strictEqual( _Math.smoothstep( 1.5, 0, 2 ), 0.84375, "Value within limits" );
				assert.strictEqual( _Math.smoothstep( 2, 0, 2 ), 1, "Value equal to maximum" );
				assert.strictEqual( _Math.smoothstep( 3, 0, 2 ), 1, "Value highter than maximum" );

			} );

			QUnit.test( "smootherstep", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "randInt", ( assert ) => {

				var low = 1, high = 3;
				var a = _Math.randInt( low, high );

				assert.ok( a >= low, "Value equal to or higher than lower limit" );
				assert.ok( a <= high, "Value equal to or lower than upper limit" );

			} );

			QUnit.test( "randFloat", ( assert ) => {

				var low = 1, high = 3;
				var a = _Math.randFloat( low, high );

				assert.ok( a >= low, "Value equal to or higher than lower limit" );
				assert.ok( a <= high, "Value equal to or lower than upper limit" );

			} );

			QUnit.test( "randFloatSpread", ( assert ) => {

				var a = _Math.randFloatSpread( 3 );

				assert.ok( a > - 3 / 2, "Value higher than lower limit" );
				assert.ok( a < 3 / 2, "Value lower than upper limit" );

			} );

			QUnit.test( "degToRad", ( assert ) => {

				assert.strictEqual( _Math.degToRad( 0 ), 0, "0 degrees" );
				assert.strictEqual( _Math.degToRad( 90 ), Math.PI / 2, "90 degrees" );
				assert.strictEqual( _Math.degToRad( 180 ), Math.PI, "180 degrees" );
				assert.strictEqual( _Math.degToRad( 360 ), Math.PI * 2, "360 degrees" );

			} );

			QUnit.test( "radToDeg", ( assert ) => {

				assert.strictEqual( _Math.radToDeg( 0 ), 0, "0 radians" );
				assert.strictEqual( _Math.radToDeg( Math.PI / 2 ), 90, "Math.PI / 2 radians" );
				assert.strictEqual( _Math.radToDeg( Math.PI ), 180, "Math.PI radians" );
				assert.strictEqual( _Math.radToDeg( Math.PI * 2 ), 360, "Math.PI * 2 radians" );

			} );

			QUnit.test( "isPowerOfTwo", ( assert ) => {

				assert.strictEqual( _Math.isPowerOfTwo( 0 ), false, "0 is not a PoT" );
				assert.strictEqual( _Math.isPowerOfTwo( 1 ), true, "1 is a PoT" );
				assert.strictEqual( _Math.isPowerOfTwo( 2 ), true, "2 is a PoT" );
				assert.strictEqual( _Math.isPowerOfTwo( 3 ), false, "3 is not a PoT" );
				assert.strictEqual( _Math.isPowerOfTwo( 4 ), true, "4 is a PoT" );

			} );

			QUnit.test( "ceilPowerOfTwo", ( assert ) => {

				assert.strictEqual( _Math.ceilPowerOfTwo( 1 ), 1, "Closest higher PoT to 1 is 1" );
				assert.strictEqual( _Math.ceilPowerOfTwo( 3 ), 4, "Closest higher PoT to 3 is 4" );
				assert.strictEqual( _Math.ceilPowerOfTwo( 4 ), 4, "Closest higher PoT to 4 is 4" );

			} );

			QUnit.test( "floorPowerOfTwo", ( assert ) => {

				assert.strictEqual( _Math.floorPowerOfTwo( 1 ), 1, "Closest lower PoT to 1 is 1" );
				assert.strictEqual( _Math.floorPowerOfTwo( 3 ), 2, "Closest lower PoT to 3 is 2" );
				assert.strictEqual( _Math.floorPowerOfTwo( 4 ), 4, "Closest lower PoT to 4 is 4" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	function matrixEquals3( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;
		if ( a.elements.length != b.elements.length ) {

			return false;

		}

		for ( var i = 0, il = a.elements.length; i < il; i ++ ) {

			var delta = a.elements[ i ] - b.elements[ i ];
			if ( delta > tolerance ) {

				return false;

			}

		}

		return true;

	}

	function toMatrix4( m3 ) {

		var result = new Matrix4();
		var re = result.elements;
		var me = m3.elements;
		re[ 0 ] = me[ 0 ];
		re[ 1 ] = me[ 1 ];
		re[ 2 ] = me[ 2 ];
		re[ 4 ] = me[ 3 ];
		re[ 5 ] = me[ 4 ];
		re[ 6 ] = me[ 5 ];
		re[ 8 ] = me[ 6 ];
		re[ 9 ] = me[ 7 ];
		re[ 10 ] = me[ 8 ];

		return result;

	}

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Matrix3', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Matrix3();
				assert.ok( a.determinant() == 1, "Passed!" );

				var b = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 3 );
				assert.ok( b.elements[ 2 ] == 6 );
				assert.ok( b.elements[ 3 ] == 1 );
				assert.ok( b.elements[ 4 ] == 4 );
				assert.ok( b.elements[ 5 ] == 7 );
				assert.ok( b.elements[ 6 ] == 2 );
				assert.ok( b.elements[ 7 ] == 5 );
				assert.ok( b.elements[ 8 ] == 8 );

				assert.ok( ! matrixEquals3( a, b ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMatrix3", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var b = new Matrix3();
				assert.ok( b.determinant() == 1, "Passed!" );

				b.set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 3 );
				assert.ok( b.elements[ 2 ] == 6 );
				assert.ok( b.elements[ 3 ] == 1 );
				assert.ok( b.elements[ 4 ] == 4 );
				assert.ok( b.elements[ 5 ] == 7 );
				assert.ok( b.elements[ 6 ] == 2 );
				assert.ok( b.elements[ 7 ] == 5 );
				assert.ok( b.elements[ 8 ] == 8 );

			} );

			QUnit.test( "identity", ( assert ) => {

				var b = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 3 );
				assert.ok( b.elements[ 2 ] == 6 );
				assert.ok( b.elements[ 3 ] == 1 );
				assert.ok( b.elements[ 4 ] == 4 );
				assert.ok( b.elements[ 5 ] == 7 );
				assert.ok( b.elements[ 6 ] == 2 );
				assert.ok( b.elements[ 7 ] == 5 );
				assert.ok( b.elements[ 8 ] == 8 );

				var a = new Matrix3();
				assert.ok( ! matrixEquals3( a, b ), "Passed!" );

				b.identity();
				assert.ok( matrixEquals3( a, b ), "Passed!" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var a = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				var b = a.clone();

				assert.ok( matrixEquals3( a, b ), "Passed!" );

				// ensure that it is a true copy
				a.elements[ 0 ] = 2;
				assert.ok( ! matrixEquals3( a, b ), "Passed!" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				var b = new Matrix3().copy( a );

				assert.ok( matrixEquals3( a, b ), "Passed!" );

				// ensure that it is a true copy
				a.elements[ 0 ] = 2;
				assert.ok( ! matrixEquals3( a, b ), "Passed!" );

			} );

			QUnit.test( "setFromMatrix4", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "applyToBufferAttribute", ( assert ) => {

				var a = new Matrix3().set( 1, 2, 3, 4, 5, 6, 7, 8, 9 );
				var attr = new Float32BufferAttribute( [ 1, 2, 1, 3, 0, 3 ], 3 );
				var expected = new Float32Array( [ 8, 20, 32, 12, 30, 48 ] );

				var applied = a.applyToBufferAttribute( attr );

				assert.deepEqual( applied.array, expected, "Check resulting buffer" );

			} );

			QUnit.test( "multiply/premultiply", ( assert ) => {

				// both simply just wrap multiplyMatrices
				var a = new Matrix3().set( 2, 3, 5, 7, 11, 13, 17, 19, 23 );
				var b = new Matrix3().set( 29, 31, 37, 41, 43, 47, 53, 59, 61 );
				var expectedMultiply = [ 446, 1343, 2491, 486, 1457, 2701, 520, 1569, 2925 ];
				var expectedPremultiply = [ 904, 1182, 1556, 1131, 1489, 1967, 1399, 1845, 2435 ];

				a.multiply( b );
				assert.deepEqual( a.elements, expectedMultiply, "multiply: check result" );

				a.set( 2, 3, 5, 7, 11, 13, 17, 19, 23 );
				a.premultiply( b );
				assert.deepEqual( a.elements, expectedPremultiply, "premultiply: check result" );

			} );

			QUnit.test( "multiplyMatrices", ( assert ) => {

				// Reference:
				//
				// #!/usr/bin/env python
				// from __future__ import print_function
				// import numpy as np
				// print(
				//     np.dot(
				//         np.reshape([2, 3, 5, 7, 11, 13, 17, 19, 23], (3, 3)),
				//         np.reshape([29, 31, 37, 41, 43, 47, 53, 59, 61], (3, 3))
				//     )
				// )
				//
				// [[ 446  486  520]
				//  [1343 1457 1569]
				//  [2491 2701 2925]]
				var lhs = new Matrix3().set( 2, 3, 5, 7, 11, 13, 17, 19, 23 );
				var rhs = new Matrix3().set( 29, 31, 37, 41, 43, 47, 53, 59, 61 );
				var ans = new Matrix3();

				ans.multiplyMatrices( lhs, rhs );

				assert.ok( ans.elements[ 0 ] == 446 );
				assert.ok( ans.elements[ 1 ] == 1343 );
				assert.ok( ans.elements[ 2 ] == 2491 );
				assert.ok( ans.elements[ 3 ] == 486 );
				assert.ok( ans.elements[ 4 ] == 1457 );
				assert.ok( ans.elements[ 5 ] == 2701 );
				assert.ok( ans.elements[ 6 ] == 520 );
				assert.ok( ans.elements[ 7 ] == 1569 );
				assert.ok( ans.elements[ 8 ] == 2925 );

			} );

			QUnit.test( "multiplyScalar", ( assert ) => {

				var b = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 3 );
				assert.ok( b.elements[ 2 ] == 6 );
				assert.ok( b.elements[ 3 ] == 1 );
				assert.ok( b.elements[ 4 ] == 4 );
				assert.ok( b.elements[ 5 ] == 7 );
				assert.ok( b.elements[ 6 ] == 2 );
				assert.ok( b.elements[ 7 ] == 5 );
				assert.ok( b.elements[ 8 ] == 8 );

				b.multiplyScalar( 2 );
				assert.ok( b.elements[ 0 ] == 0 * 2 );
				assert.ok( b.elements[ 1 ] == 3 * 2 );
				assert.ok( b.elements[ 2 ] == 6 * 2 );
				assert.ok( b.elements[ 3 ] == 1 * 2 );
				assert.ok( b.elements[ 4 ] == 4 * 2 );
				assert.ok( b.elements[ 5 ] == 7 * 2 );
				assert.ok( b.elements[ 6 ] == 2 * 2 );
				assert.ok( b.elements[ 7 ] == 5 * 2 );
				assert.ok( b.elements[ 8 ] == 8 * 2 );

			} );

			QUnit.test( "determinant", ( assert ) => {

				var a = new Matrix3();
				assert.ok( a.determinant() == 1, "Passed!" );

				a.elements[ 0 ] = 2;
				assert.ok( a.determinant() == 2, "Passed!" );

				a.elements[ 0 ] = 0;
				assert.ok( a.determinant() == 0, "Passed!" );

				// calculated via http://www.euclideanspace.com/maths/algebra/matrix/functions/determinant/threeD/index.htm
				a.set( 2, 3, 4, 5, 13, 7, 8, 9, 11 );
				assert.ok( a.determinant() == - 73, "Passed!" );

			} );

			QUnit.test( "getInverse", ( assert ) => {

				var identity = new Matrix3();
				var identity4 = new Matrix4();
				var a = new Matrix3();
				var b = new Matrix3().set( 0, 0, 0, 0, 0, 0, 0, 0, 0 );
				var c = new Matrix3().set( 0, 0, 0, 0, 0, 0, 0, 0, 0 );

				b.getInverse( a, false );
				assert.ok( matrixEquals3( a, identity ), "Matrix a is identity matrix" );

				try {

					b.getInverse( c, true );
					assert.ok( false, "Should never get here !" ); // should never get here.

				} catch ( err ) {

					assert.ok( true, "Passed: " + err );

				}

				var testMatrices = [
					new Matrix4().makeRotationX( 0.3 ),
					new Matrix4().makeRotationX( - 0.3 ),
					new Matrix4().makeRotationY( 0.3 ),
					new Matrix4().makeRotationY( - 0.3 ),
					new Matrix4().makeRotationZ( 0.3 ),
					new Matrix4().makeRotationZ( - 0.3 ),
					new Matrix4().makeScale( 1, 2, 3 ),
					new Matrix4().makeScale( 1 / 8, 1 / 2, 1 / 3 )
				];

				for ( var i = 0, il = testMatrices.length; i < il; i ++ ) {

					var m = testMatrices[ i ];

					a.setFromMatrix4( m );
					var mInverse3 = b.getInverse( a );

					var mInverse = toMatrix4( mInverse3 );

					// the determinant of the inverse should be the reciprocal
					assert.ok( Math.abs( a.determinant() * mInverse3.determinant() - 1 ) < 0.0001, "Passed!" );
					assert.ok( Math.abs( m.determinant() * mInverse.determinant() - 1 ) < 0.0001, "Passed!" );

					var mProduct = new Matrix4().multiplyMatrices( m, mInverse );
					assert.ok( Math.abs( mProduct.determinant() - 1 ) < 0.0001, "Passed!" );
					assert.ok( matrixEquals3( mProduct, identity4 ), "Passed!" );

				}

			} );

			QUnit.test( "transpose", ( assert ) => {

				var a = new Matrix3();
				var b = a.clone().transpose();
				assert.ok( matrixEquals3( a, b ), "Passed!" );

				var b = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				var c = b.clone().transpose();
				assert.ok( ! matrixEquals3( b, c ), "Passed!" );
				c.transpose();
				assert.ok( matrixEquals3( b, c ), "Passed!" );

			} );

			QUnit.test( "getNormalMatrix", ( assert ) => {

				var a = new Matrix3();
				var b = new Matrix4().set(
					2, 3, 5, 7,
					11, 13, 17, 19,
					23, 29, 31, 37,
					41, 43, 47, 57
				);
				var expected = new Matrix3().set(
					- 1.2857142857142856, 0.7142857142857143, 0.2857142857142857,
					0.7428571428571429, - 0.7571428571428571, 0.15714285714285714,
					- 0.19999999999999998, 0.3, - 0.09999999999999999
				);

				a.getNormalMatrix( b );
				assert.ok( matrixEquals3( a, expected ), "Check resulting Matrix3" );

			} );

			QUnit.test( "transposeIntoArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setUvTransform", ( assert ) => {

				var a = new Matrix3().set(
					0.1767766952966369, 0.17677669529663687, 0.32322330470336313,
					- 0.17677669529663687, 0.1767766952966369, 0.5,
					0, 0, 1
				);
				var b = new Matrix3();
				var params = {
					centerX: 0.5,
					centerY: 0.5,
					offsetX: 0,
					offsetY: 0,
					repeatX: 0.25,
					repeatY: 0.25,
					rotation: 0.7753981633974483
				};
				var expected = new Matrix3().set(
					0.1785355940258599, 0.17500011904519763, 0.32323214346447127,
					- 0.17500011904519763, 0.1785355940258599, 0.4982322625096689,
					0, 0, 1
				);

				a.setUvTransform(
					params.offsetX, params.offsetY,
					params.repeatX, params.repeatY,
					params.rotation,
					params.centerX, params.centerY
				);

				b.identity()
				 .translate( - params.centerX, - params.centerY )
				 .rotate( params.rotation )
				 .scale( params.repeatX, params.repeatY )
				 .translate( params.centerX, params.centerY )
				 .translate( params.offsetX, params.offsetY );

				assert.ok( matrixEquals3( a, expected ), "Check direct method" );
				assert.ok( matrixEquals3( b, expected ), "Check indirect method" );

			} );

			QUnit.test( "scale", ( assert ) => {

				var a = new Matrix3().set( 1, 2, 3, 4, 5, 6, 7, 8, 9 );
				var expected = new Matrix3().set(
					0.25, 0.5, 0.75,
					1, 1.25, 1.5,
					7, 8, 9
				);

				a.scale( 0.25, 0.25 );
				assert.ok( matrixEquals3( a, expected ), "Check scaling result" );

			} );

			QUnit.test( "rotate", ( assert ) => {

				var a = new Matrix3().set( 1, 2, 3, 4, 5, 6, 7, 8, 9 );
				var expected = new Matrix3().set(
					3.5355339059327373, 4.949747468305833, 6.363961030678928,
					2.121320343559643, 2.121320343559643, 2.1213203435596433,
					7, 8, 9
				);

				a.rotate( Math.PI / 4 );
				assert.ok( matrixEquals3( a, expected ), "Check rotated result" );

			} );

			QUnit.test( "translate", ( assert ) => {

				var a = new Matrix3().set( 1, 2, 3, 4, 5, 6, 7, 8, 9 );
				var expected = new Matrix3().set( 22, 26, 30, 53, 61, 69, 7, 8, 9 );

				a.translate( 3, 7 );
				assert.ok( matrixEquals3( a, expected ), "Check translation result" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Matrix3().set( 0, 1, 2, 3, 4, 5, 6, 7, 8 );
				var b = new Matrix3().set( 0, - 1, 2, 3, 4, 5, 6, 7, 8 );

				assert.notOk( a.equals( b ), "Check that a does not equal b" );
				assert.notOk( b.equals( a ), "Check that b does not equal a" );

				a.copy( b );
				assert.ok( a.equals( b ), "Check that a equals b after copy()" );
				assert.ok( b.equals( a ), "Check that b equals a after copy()" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var a = new Matrix3().set( 1, 2, 3, 4, 5, 6, 7, 8, 9 );
				var noOffset = [ 1, 4, 7, 2, 5, 8, 3, 6, 9 ];
				var withOffset = [ undefined, 1, 4, 7, 2, 5, 8, 3, 6, 9 ];

				var array = a.toArray();
				assert.deepEqual( array, noOffset, "No array, no offset" );

				var array = [];
				a.toArray( array );
				assert.deepEqual( array, noOffset, "With array, no offset" );

				var array = [];
				a.toArray( array, 1 );
				assert.deepEqual( array, withOffset, "With array, with offset" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	function matrixEquals4$1( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;
		if ( a.elements.length != b.elements.length ) {

			return false;

		}

		for ( var i = 0, il = a.elements.length; i < il; i ++ ) {

			var delta = a.elements[ i ] - b.elements[ i ];
			if ( delta > tolerance ) {

				return false;

			}

		}

		return true;

	}

	// from Euler.js
	function eulerEquals$1( a, b, tolerance ) {

		tolerance = tolerance || 0.0001;
		var diff = Math.abs( a.x - b.x ) + Math.abs( a.y - b.y ) + Math.abs( a.z - b.z );
		return ( diff < tolerance );

	}

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Matrix4', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Matrix4();
				assert.ok( a.determinant() == 1, "Passed!" );

				var b = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 4 );
				assert.ok( b.elements[ 2 ] == 8 );
				assert.ok( b.elements[ 3 ] == 12 );
				assert.ok( b.elements[ 4 ] == 1 );
				assert.ok( b.elements[ 5 ] == 5 );
				assert.ok( b.elements[ 6 ] == 9 );
				assert.ok( b.elements[ 7 ] == 13 );
				assert.ok( b.elements[ 8 ] == 2 );
				assert.ok( b.elements[ 9 ] == 6 );
				assert.ok( b.elements[ 10 ] == 10 );
				assert.ok( b.elements[ 11 ] == 14 );
				assert.ok( b.elements[ 12 ] == 3 );
				assert.ok( b.elements[ 13 ] == 7 );
				assert.ok( b.elements[ 14 ] == 11 );
				assert.ok( b.elements[ 15 ] == 15 );

				assert.ok( ! matrixEquals4$1( a, b ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMatrix4", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var b = new Matrix4();
				assert.ok( b.determinant() == 1, "Passed!" );

				b.set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 4 );
				assert.ok( b.elements[ 2 ] == 8 );
				assert.ok( b.elements[ 3 ] == 12 );
				assert.ok( b.elements[ 4 ] == 1 );
				assert.ok( b.elements[ 5 ] == 5 );
				assert.ok( b.elements[ 6 ] == 9 );
				assert.ok( b.elements[ 7 ] == 13 );
				assert.ok( b.elements[ 8 ] == 2 );
				assert.ok( b.elements[ 9 ] == 6 );
				assert.ok( b.elements[ 10 ] == 10 );
				assert.ok( b.elements[ 11 ] == 14 );
				assert.ok( b.elements[ 12 ] == 3 );
				assert.ok( b.elements[ 13 ] == 7 );
				assert.ok( b.elements[ 14 ] == 11 );
				assert.ok( b.elements[ 15 ] == 15 );

			} );

			QUnit.test( "identity", ( assert ) => {

				var b = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 4 );
				assert.ok( b.elements[ 2 ] == 8 );
				assert.ok( b.elements[ 3 ] == 12 );
				assert.ok( b.elements[ 4 ] == 1 );
				assert.ok( b.elements[ 5 ] == 5 );
				assert.ok( b.elements[ 6 ] == 9 );
				assert.ok( b.elements[ 7 ] == 13 );
				assert.ok( b.elements[ 8 ] == 2 );
				assert.ok( b.elements[ 9 ] == 6 );
				assert.ok( b.elements[ 10 ] == 10 );
				assert.ok( b.elements[ 11 ] == 14 );
				assert.ok( b.elements[ 12 ] == 3 );
				assert.ok( b.elements[ 13 ] == 7 );
				assert.ok( b.elements[ 14 ] == 11 );
				assert.ok( b.elements[ 15 ] == 15 );

				var a = new Matrix4();
				assert.ok( ! matrixEquals4$1( a, b ), "Passed!" );

				b.identity();
				assert.ok( matrixEquals4$1( a, b ), "Passed!" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var a = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				var b = a.clone();

				assert.ok( matrixEquals4$1( a, b ), "Passed!" );

				// ensure that it is a true copy
				a.elements[ 0 ] = 2;
				assert.ok( ! matrixEquals4$1( a, b ), "Passed!" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				var b = new Matrix4().copy( a );

				assert.ok( matrixEquals4$1( a, b ), "Passed!" );

				// ensure that it is a true copy
				a.elements[ 0 ] = 2;
				assert.ok( ! matrixEquals4$1( a, b ), "Passed!" );

			} );

			QUnit.test( "copyPosition", ( assert ) => {

				var a = new Matrix4().set( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );
				var b = new Matrix4().set( 1, 2, 3, 0, 5, 6, 7, 0, 9, 10, 11, 0, 13, 14, 15, 16 );

				assert.notOk( matrixEquals4$1( a, b ), "a and b initially not equal" );

				b.copyPosition( a );
				assert.ok( matrixEquals4$1( a, b ), "a and b equal after copyPosition()" );

			} );

			QUnit.test( "makeBasis/extractBasis", ( assert ) => {

				var identityBasis = [ new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ) ];
				var a = new Matrix4().makeBasis( identityBasis[ 0 ], identityBasis[ 1 ], identityBasis[ 2 ] );
				var identity = new Matrix4();
				assert.ok( matrixEquals4$1( a, identity ), "Passed!" );

				var testBases = [[ new Vector3( 0, 1, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ) ]];
				for ( var i = 0; i < testBases.length; i ++ ) {

					var testBasis = testBases[ i ];
					var b = new Matrix4().makeBasis( testBasis[ 0 ], testBasis[ 1 ], testBasis[ 2 ] );
					var outBasis = [ new Vector3(), new Vector3(), new Vector3() ];
					b.extractBasis( outBasis[ 0 ], outBasis[ 1 ], outBasis[ 2 ] );
					// check what goes in, is what comes out.
					for ( var j = 0; j < outBasis.length; j ++ ) {

						assert.ok( outBasis[ j ].equals( testBasis[ j ] ), "Passed!" );

					}

					// get the basis out the hard war
					for ( var j = 0; j < identityBasis.length; j ++ ) {

						outBasis[ j ].copy( identityBasis[ j ] );
						outBasis[ j ].applyMatrix4( b );

					}
					// did the multiply method of basis extraction work?
					for ( var j = 0; j < outBasis.length; j ++ ) {

						assert.ok( outBasis[ j ].equals( testBasis[ j ] ), "Passed!" );

					}

				}

			} );

			QUnit.test( "extractRotation", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeRotationFromEuler/extractRotation", ( assert ) => {

				var testValues = [
					new Euler( 0, 0, 0, "XYZ" ),
					new Euler( 1, 0, 0, "XYZ" ),
					new Euler( 0, 1, 0, "ZYX" ),
					new Euler( 0, 0, 0.5, "YZX" ),
					new Euler( 0, 0, - 0.5, "YZX" )
				];

				for ( var i = 0; i < testValues.length; i ++ ) {

					var v = testValues[ i ];

					var m = new Matrix4().makeRotationFromEuler( v );

					var v2 = new Euler().setFromRotationMatrix( m, v.order );
					var m2 = new Matrix4().makeRotationFromEuler( v2 );

					assert.ok( matrixEquals4$1( m, m2, eps ), "makeRotationFromEuler #" + i + ": original and Euler-derived matrices are equal" );
					assert.ok( eulerEquals$1( v, v2, eps ), "makeRotationFromEuler #" + i + ": original and matrix-derived Eulers are equal" );

					var m3 = new Matrix4().extractRotation( m2 );
					var v3 = new Euler().setFromRotationMatrix( m3, v.order );

					assert.ok( matrixEquals4$1( m, m3, eps ), "extractRotation #" + i + ": original and extracted matrices are equal" );
					assert.ok( eulerEquals$1( v, v3, eps ), "extractRotation #" + i + ": original and extracted Eulers are equal" );

				}

			} );

			QUnit.test( "lookAt", ( assert ) => {

				var a = new Matrix4();
				var expected = new Matrix4().identity();
				var eye = new Vector3( 0, 0, 0 );
				var target = new Vector3( 0, 1, - 1 );
				var up = new Vector3( 0, 1, 0 );

				a.lookAt( eye, target, up );
				var rotation = new Euler().setFromRotationMatrix( a );
				assert.numEqual( rotation.x * ( 180 / Math.PI ), 45, "Check the rotation" );

				// eye and target are in the same position
				eye.copy( target );
				a.lookAt( eye, target, up );
				assert.ok( matrixEquals4$1( a, expected ), "Check the result for eye == target" );

				// up and z are parallel
				eye.set( 0, 1, 0 );
				target.set( 0, 0, 0 );
				a.lookAt( eye, target, up );
				expected.set(
					1, 0, 0, 0,
					0, 0.0001, 1, 0,
					0, - 1, 0.0001, 0,
					0, 0, 0, 1
				);
				assert.ok( matrixEquals4$1( a, expected ), "Check the result for when up and z are parallel" );

			} );

			QUnit.test( "multiply", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "premultiply", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiplyMatrices", ( assert ) => {

				// Reference:
				//
				// #!/usr/bin/env python
				// from __future__ import print_function
				// import numpy as np
				// print(
				//     np.dot(
				//         np.reshape([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53], (4, 4)),
				//         np.reshape([59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131], (4, 4))
				//     )
				// )
				//
				// [[ 1585  1655  1787  1861]
				//  [ 5318  5562  5980  6246]
				//  [10514 11006 11840 12378]
				//  [15894 16634 17888 18710]]
				var lhs = new Matrix4().set( 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 );
				var rhs = new Matrix4().set( 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131 );
				var ans = new Matrix4();

				ans.multiplyMatrices( lhs, rhs );

				assert.ok( ans.elements[ 0 ] == 1585 );
				assert.ok( ans.elements[ 1 ] == 5318 );
				assert.ok( ans.elements[ 2 ] == 10514 );
				assert.ok( ans.elements[ 3 ] == 15894 );
				assert.ok( ans.elements[ 4 ] == 1655 );
				assert.ok( ans.elements[ 5 ] == 5562 );
				assert.ok( ans.elements[ 6 ] == 11006 );
				assert.ok( ans.elements[ 7 ] == 16634 );
				assert.ok( ans.elements[ 8 ] == 1787 );
				assert.ok( ans.elements[ 9 ] == 5980 );
				assert.ok( ans.elements[ 10 ] == 11840 );
				assert.ok( ans.elements[ 11 ] == 17888 );
				assert.ok( ans.elements[ 12 ] == 1861 );
				assert.ok( ans.elements[ 13 ] == 6246 );
				assert.ok( ans.elements[ 14 ] == 12378 );
				assert.ok( ans.elements[ 15 ] == 18710 );

			} );

			QUnit.test( "multiplyScalar", ( assert ) => {

				var b = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				assert.ok( b.elements[ 0 ] == 0 );
				assert.ok( b.elements[ 1 ] == 4 );
				assert.ok( b.elements[ 2 ] == 8 );
				assert.ok( b.elements[ 3 ] == 12 );
				assert.ok( b.elements[ 4 ] == 1 );
				assert.ok( b.elements[ 5 ] == 5 );
				assert.ok( b.elements[ 6 ] == 9 );
				assert.ok( b.elements[ 7 ] == 13 );
				assert.ok( b.elements[ 8 ] == 2 );
				assert.ok( b.elements[ 9 ] == 6 );
				assert.ok( b.elements[ 10 ] == 10 );
				assert.ok( b.elements[ 11 ] == 14 );
				assert.ok( b.elements[ 12 ] == 3 );
				assert.ok( b.elements[ 13 ] == 7 );
				assert.ok( b.elements[ 14 ] == 11 );
				assert.ok( b.elements[ 15 ] == 15 );

				b.multiplyScalar( 2 );
				assert.ok( b.elements[ 0 ] == 0 * 2 );
				assert.ok( b.elements[ 1 ] == 4 * 2 );
				assert.ok( b.elements[ 2 ] == 8 * 2 );
				assert.ok( b.elements[ 3 ] == 12 * 2 );
				assert.ok( b.elements[ 4 ] == 1 * 2 );
				assert.ok( b.elements[ 5 ] == 5 * 2 );
				assert.ok( b.elements[ 6 ] == 9 * 2 );
				assert.ok( b.elements[ 7 ] == 13 * 2 );
				assert.ok( b.elements[ 8 ] == 2 * 2 );
				assert.ok( b.elements[ 9 ] == 6 * 2 );
				assert.ok( b.elements[ 10 ] == 10 * 2 );
				assert.ok( b.elements[ 11 ] == 14 * 2 );
				assert.ok( b.elements[ 12 ] == 3 * 2 );
				assert.ok( b.elements[ 13 ] == 7 * 2 );
				assert.ok( b.elements[ 14 ] == 11 * 2 );
				assert.ok( b.elements[ 15 ] == 15 * 2 );

			} );

			QUnit.test( "applyToBufferAttribute", ( assert ) => {

				var a = new Matrix4().set( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );
				var attr = new Float32BufferAttribute( [ 1, 2, 1, 3, 0, 3 ], 3 );
				var expected = new Float32BufferAttribute( [
					0.1666666716337204, 0.4444444477558136, 0.7222222089767456,
					0.1599999964237213, 0.4399999976158142, 0.7200000286102295
				], 3 );

				var applied = a.applyToBufferAttribute( attr );

				assert.strictEqual( expected.count, applied.count, "Applied buffer and expected buffer have the same number of entries" );

				for ( var i = 0, l = expected.count; i < l; i ++ ) {

					assert.ok( Math.abs( applied.getX( i ) - expected.getX( i ) ) <= eps, "Check x" );
					assert.ok( Math.abs( applied.getY( i ) - expected.getY( i ) ) <= eps, "Check y" );
					assert.ok( Math.abs( applied.getZ( i ) - expected.getZ( i ) ) <= eps, "Check z" );

				}

			} );

			QUnit.test( "determinant", ( assert ) => {

				var a = new Matrix4();
				assert.ok( a.determinant() == 1, "Passed!" );

				a.elements[ 0 ] = 2;
				assert.ok( a.determinant() == 2, "Passed!" );

				a.elements[ 0 ] = 0;
				assert.ok( a.determinant() == 0, "Passed!" );

				// calculated via http://www.euclideanspace.com/maths/algebra/matrix/functions/determinant/fourD/index.htm
				a.set( 2, 3, 4, 5, - 1, - 21, - 3, - 4, 6, 7, 8, 10, - 8, - 9, - 10, - 12 );
				assert.ok( a.determinant() == 76, "Passed!" );

			} );

			QUnit.test( "transpose", ( assert ) => {

				var a = new Matrix4();
				var b = a.clone().transpose();
				assert.ok( matrixEquals4$1( a, b ), "Passed!" );

				var b = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
				var c = b.clone().transpose();
				assert.ok( ! matrixEquals4$1( b, c ), "Passed!" );
				c.transpose();
				assert.ok( matrixEquals4$1( b, c ), "Passed!" );

			} );

			QUnit.test( "setPosition", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getInverse", ( assert ) => {

				var identity = new Matrix4();

				var a = new Matrix4();
				var b = new Matrix4().set( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 );
				var c = new Matrix4().set( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 );

				assert.ok( ! matrixEquals4$1( a, b ), "Passed!" );
				b.getInverse( a, false );
				assert.ok( matrixEquals4$1( b, new Matrix4() ), "Passed!" );

				try {

					b.getInverse( c, true );
					assert.ok( false, "Passed!" ); // should never get here.

				} catch ( err ) {

					assert.ok( true, "Passed!" );

				}

				var testMatrices = [
					new Matrix4().makeRotationX( 0.3 ),
					new Matrix4().makeRotationX( - 0.3 ),
					new Matrix4().makeRotationY( 0.3 ),
					new Matrix4().makeRotationY( - 0.3 ),
					new Matrix4().makeRotationZ( 0.3 ),
					new Matrix4().makeRotationZ( - 0.3 ),
					new Matrix4().makeScale( 1, 2, 3 ),
					new Matrix4().makeScale( 1 / 8, 1 / 2, 1 / 3 ),
					new Matrix4().makePerspective( - 1, 1, 1, - 1, 1, 1000 ),
					new Matrix4().makePerspective( - 16, 16, 9, - 9, 0.1, 10000 ),
					new Matrix4().makeTranslation( 1, 2, 3 )
				];

				for ( var i = 0, il = testMatrices.length; i < il; i ++ ) {

					var m = testMatrices[ i ];

					var mInverse = new Matrix4().getInverse( m );
					var mSelfInverse = m.clone();
					mSelfInverse.getInverse( mSelfInverse );

					// self-inverse should the same as inverse
					assert.ok( matrixEquals4$1( mSelfInverse, mInverse ), "Passed!" );

					// the determinant of the inverse should be the reciprocal
					assert.ok( Math.abs( m.determinant() * mInverse.determinant() - 1 ) < 0.0001, "Passed!" );

					var mProduct = new Matrix4().multiplyMatrices( m, mInverse );

					// the determinant of the identity matrix is 1
					assert.ok( Math.abs( mProduct.determinant() - 1 ) < 0.0001, "Passed!" );
					assert.ok( matrixEquals4$1( mProduct, identity ), "Passed!" );

				}

			} );

			QUnit.test( "scale", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getMaxScaleOnAxis", ( assert ) => {

				var a = new Matrix4().set( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );
				var expected = Math.sqrt( 3 * 3 + 7 * 7 + 11 * 11 );

				assert.ok( Math.abs( a.getMaxScaleOnAxis() - expected ) <= eps, "Check result" );

			} );

			QUnit.test( "makeTranslation", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeRotationX", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeRotationY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeRotationZ", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeRotationAxis", ( assert ) => {

				var axis = new Vector3( 1.5, 0.0, 1.0 ).normalize();
				var radians = _Math.degToRad( 45 );
				var a = new Matrix4().makeRotationAxis( axis, radians );

				var expected = new Matrix4().set(
					0.9098790095958609, - 0.39223227027636803, 0.13518148560620882, 0,
					0.39223227027636803, 0.7071067811865476, - 0.588348405414552, 0,
					0.13518148560620882, 0.588348405414552, 0.7972277715906868, 0,
					0, 0, 0, 1
				);

				assert.ok( matrixEquals4$1( a, expected ), "Check numeric result" );

			} );

			QUnit.test( "makeScale", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeShear", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "compose/decompose", ( assert ) => {

				var tValues = [
					new Vector3(),
					new Vector3( 3, 0, 0 ),
					new Vector3( 0, 4, 0 ),
					new Vector3( 0, 0, 5 ),
					new Vector3( - 6, 0, 0 ),
					new Vector3( 0, - 7, 0 ),
					new Vector3( 0, 0, - 8 ),
					new Vector3( - 2, 5, - 9 ),
					new Vector3( - 2, - 5, - 9 )
				];

				var sValues = [
					new Vector3( 1, 1, 1 ),
					new Vector3( 2, 2, 2 ),
					new Vector3( 1, - 1, 1 ),
					new Vector3( - 1, 1, 1 ),
					new Vector3( 1, 1, - 1 ),
					new Vector3( 2, - 2, 1 ),
					new Vector3( - 1, 2, - 2 ),
					new Vector3( - 1, - 1, - 1 ),
					new Vector3( - 2, - 2, - 2 )
				];

				var rValues = [
					new Quaternion(),
					new Quaternion().setFromEuler( new Euler( 1, 1, 0 ) ),
					new Quaternion().setFromEuler( new Euler( 1, - 1, 1 ) ),
					new Quaternion( 0, 0.9238795292366128, 0, 0.38268342717215614 )
				];

				for ( var ti = 0; ti < tValues.length; ti ++ ) {

					for ( var si = 0; si < sValues.length; si ++ ) {

						for ( var ri = 0; ri < rValues.length; ri ++ ) {

							var t = tValues[ ti ];
							var s = sValues[ si ];
							var r = rValues[ ri ];

							var m = new Matrix4().compose( t, r, s );
							var t2 = new Vector3();
							var r2 = new Quaternion();
							var s2 = new Vector3();

							m.decompose( t2, r2, s2 );

							var m2 = new Matrix4().compose( t2, r2, s2 );

							/*
							// debug code
							var matrixIsSame = matrixEquals4( m, m2 );
							if ( ! matrixIsSame ) {

								console.log( t, s, r );
								console.log( t2, s2, r2 );
								console.log( m, m2 );

							}
							*/

							assert.ok( matrixEquals4$1( m, m2 ), "Passed!" );

						}

					}

				}

			} );

			QUnit.test( "makePerspective", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "makeOrthographic", ( assert ) => {

				var a = new Matrix4().makeOrthographic( - 1, 1, - 1, 1, 1, 100 );
				var expected = new Matrix4().set(
					1, 0, 0, 0,
					0, - 1, 0, 0,
					0, 0, - 2 / 99, - 101 / 99,
					0, 0, 0, 1
				);

				assert.ok( matrixEquals4$1( a, expected ), "Check result" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Matrix4().set( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );
				var b = new Matrix4().set( 0, - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );

				assert.notOk( a.equals( b ), "Check that a does not equal b" );
				assert.notOk( b.equals( a ), "Check that b does not equal a" );

				a.copy( b );
				assert.ok( a.equals( b ), "Check that a equals b after copy()" );
				assert.ok( b.equals( a ), "Check that b equals a after copy()" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var a = new Matrix4().set( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );
				var noOffset = [ 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15, 4, 8, 12, 16 ];
				var withOffset = [ undefined, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15, 4, 8, 12, 16 ];

				var array = a.toArray();
				assert.deepEqual( array, noOffset, "No array, no offset" );

				var array = [];
				a.toArray( array );
				assert.deepEqual( array, noOffset, "With array, no offset" );

				var array = [];
				a.toArray( array, 1 );
				assert.deepEqual( array, withOffset, "With array, with offset" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	function comparePlane( a, b, threshold ) {

		threshold = threshold || 0.0001;
		return ( a.normal.distanceTo( b.normal ) < threshold &&
		Math.abs( a.constant - b.constant ) < threshold );

	}

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Plane', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Plane();
				assert.ok( a.normal.x == 1, "Passed!" );
				assert.ok( a.normal.y == 0, "Passed!" );
				assert.ok( a.normal.z == 0, "Passed!" );
				assert.ok( a.constant == 0, "Passed!" );

				var a = new Plane( one3.clone(), 0 );
				assert.ok( a.normal.x == 1, "Passed!" );
				assert.ok( a.normal.y == 1, "Passed!" );
				assert.ok( a.normal.z == 1, "Passed!" );
				assert.ok( a.constant == 0, "Passed!" );

				var a = new Plane( one3.clone(), 1 );
				assert.ok( a.normal.x == 1, "Passed!" );
				assert.ok( a.normal.y == 1, "Passed!" );
				assert.ok( a.normal.z == 1, "Passed!" );
				assert.ok( a.constant == 1, "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isPlane", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Plane();
				assert.ok( a.normal.x == 1, "Passed!" );
				assert.ok( a.normal.y == 0, "Passed!" );
				assert.ok( a.normal.z == 0, "Passed!" );
				assert.ok( a.constant == 0, "Passed!" );

				var b = a.clone().set( new Vector3( x, y, z ), w );
				assert.ok( b.normal.x == x, "Passed!" );
				assert.ok( b.normal.y == y, "Passed!" );
				assert.ok( b.normal.z == z, "Passed!" );
				assert.ok( b.constant == w, "Passed!" );

			} );

			QUnit.test( "setComponents", ( assert ) => {

				var a = new Plane();
				assert.ok( a.normal.x == 1, "Passed!" );
				assert.ok( a.normal.y == 0, "Passed!" );
				assert.ok( a.normal.z == 0, "Passed!" );
				assert.ok( a.constant == 0, "Passed!" );

				var b = a.clone().setComponents( x, y, z, w );
				assert.ok( b.normal.x == x, "Passed!" );
				assert.ok( b.normal.y == y, "Passed!" );
				assert.ok( b.normal.z == z, "Passed!" );
				assert.ok( b.constant == w, "Passed!" );

			} );

			QUnit.test( "setFromNormalAndCoplanarPoint", ( assert ) => {

				var normal = one3.clone().normalize();
				var a = new Plane().setFromNormalAndCoplanarPoint( normal, zero3 );

				assert.ok( a.normal.equals( normal ), "Passed!" );
				assert.ok( a.constant == 0, "Passed!" );

			} );

			QUnit.test( "setFromCoplanarPoints", ( assert ) => {

				var a = new Plane();
				var v1 = new Vector3( 2.0, 0.5, 0.25 );
				var v2 = new Vector3( 2.0, - 0.5, 1.25 );
				var v3 = new Vector3( 2.0, - 3.5, 2.2 );
				var normal = new Vector3( 1, 0, 0 );
				var constant = - 2;

				a.setFromCoplanarPoints( v1, v2, v3 );

				assert.ok( a.normal.equals( normal ), "Check normal" );
				assert.strictEqual( a.constant, constant, "Check constant" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Plane( new Vector3( x, y, z ), w );
				var b = new Plane().copy( a );
				assert.ok( b.normal.x == x, "Passed!" );
				assert.ok( b.normal.y == y, "Passed!" );
				assert.ok( b.normal.z == z, "Passed!" );
				assert.ok( b.constant == w, "Passed!" );

				// ensure that it is a true copy
				a.normal.x = 0;
				a.normal.y = - 1;
				a.normal.z = - 2;
				a.constant = - 3;
				assert.ok( b.normal.x == x, "Passed!" );
				assert.ok( b.normal.y == y, "Passed!" );
				assert.ok( b.normal.z == z, "Passed!" );
				assert.ok( b.constant == w, "Passed!" );

			} );

			QUnit.test( "normalize", ( assert ) => {

				var a = new Plane( new Vector3( 2, 0, 0 ), 2 );

				a.normalize();
				assert.ok( a.normal.length() == 1, "Passed!" );
				assert.ok( a.normal.equals( new Vector3( 1, 0, 0 ) ), "Passed!" );
				assert.ok( a.constant == 1, "Passed!" );

			} );

			QUnit.test( "negate/distanceToPoint", ( assert ) => {

				var a = new Plane( new Vector3( 2, 0, 0 ), - 2 );

				a.normalize();
				assert.ok( a.distanceToPoint( new Vector3( 4, 0, 0 ) ) === 3, "Passed!" );
				assert.ok( a.distanceToPoint( new Vector3( 1, 0, 0 ) ) === 0, "Passed!" );

				a.negate();
				assert.ok( a.distanceToPoint( new Vector3( 4, 0, 0 ) ) === - 3, "Passed!" );
				assert.ok( a.distanceToPoint( new Vector3( 1, 0, 0 ) ) === 0, "Passed!" );

			} );

			QUnit.test( "distanceToPoint", ( assert ) => {

				var a = new Plane( new Vector3( 2, 0, 0 ), - 2 );

				a.normalize();
				assert.ok( a.distanceToPoint( a.projectPoint( zero3.clone() ) ) === 0, "Passed!" );
				assert.ok( a.distanceToPoint( new Vector3( 4, 0, 0 ) ) === 3, "Passed!" );

			} );

			QUnit.test( "distanceToSphere", ( assert ) => {

				var a = new Plane( new Vector3( 1, 0, 0 ), 0 );

				var b = new Sphere( new Vector3( 2, 0, 0 ), 1 );

				assert.ok( a.distanceToSphere( b ) === 1, "Passed!" );

				a.set( new Vector3( 1, 0, 0 ), 2 );
				assert.ok( a.distanceToSphere( b ) === 3, "Passed!" );
				a.set( new Vector3( 1, 0, 0 ), - 2 );
				assert.ok( a.distanceToSphere( b ) === - 1, "Passed!" );

			} );

			QUnit.test( "projectPoint", ( assert ) => {

				var a = new Plane( new Vector3( 1, 0, 0 ), 0 );

				assert.ok( a.projectPoint( new Vector3( 10, 0, 0 ) ).equals( zero3 ), "Passed!" );
				assert.ok( a.projectPoint( new Vector3( - 10, 0, 0 ) ).equals( zero3 ), "Passed!" );

				var a = new Plane( new Vector3( 0, 1, 0 ), - 1 );
				assert.ok( a.projectPoint( new Vector3( 0, 0, 0 ) ).equals( new Vector3( 0, 1, 0 ) ), "Passed!" );
				assert.ok( a.projectPoint( new Vector3( 0, 1, 0 ) ).equals( new Vector3( 0, 1, 0 ) ), "Passed!" );

			} );

			QUnit.test( "isInterestionLine/intersectLine", ( assert ) => {

				var a = new Plane( new Vector3( 1, 0, 0 ), 0 );

				var l1 = new Line3( new Vector3( - 10, 0, 0 ), new Vector3( 10, 0, 0 ) );
				assert.ok( a.intersectsLine( l1 ), "Passed!" );
				assert.ok( a.intersectLine( l1 ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				var a = new Plane( new Vector3( 1, 0, 0 ), - 3 );

				assert.ok( a.intersectsLine( l1 ), "Passed!" );
				assert.ok( a.intersectLine( l1 ).equals( new Vector3( 3, 0, 0 ) ), "Passed!" );

				var a = new Plane( new Vector3( 1, 0, 0 ), - 11 );

				assert.ok( ! a.intersectsLine( l1 ), "Passed!" );
				assert.ok( a.intersectLine( l1 ) === undefined, "Passed!" );

				var a = new Plane( new Vector3( 1, 0, 0 ), 11 );

				assert.ok( ! a.intersectsLine( l1 ), "Passed!" );
				assert.ok( a.intersectLine( l1 ) === undefined, "Passed!" );

			} );

			QUnit.test( "intersectsBox", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "intersectsSphere", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "coplanarPoint", ( assert ) => {

				var a = new Plane( new Vector3( 1, 0, 0 ), 0 );
				assert.ok( a.distanceToPoint( a.coplanarPoint() ) === 0, "Passed!" );

				var a = new Plane( new Vector3( 0, 1, 0 ), - 1 );
				assert.ok( a.distanceToPoint( a.coplanarPoint() ) === 0, "Passed!" );

			} );

			QUnit.test( "applyMatrix4/translate", ( assert ) => {

				var a = new Plane( new Vector3( 1, 0, 0 ), 0 );

				var m = new Matrix4();
				m.makeRotationZ( Math.PI * 0.5 );

				assert.ok( comparePlane( a.clone().applyMatrix4( m ), new Plane( new Vector3( 0, 1, 0 ), 0 ) ), "Passed!" );

				var a = new Plane( new Vector3( 0, 1, 0 ), - 1 );
				assert.ok( comparePlane( a.clone().applyMatrix4( m ), new Plane( new Vector3( - 1, 0, 0 ), - 1 ) ), "Passed!" );

				m.makeTranslation( 1, 1, 1 );
				assert.ok( comparePlane( a.clone().applyMatrix4( m ), a.clone().translate( new Vector3( 1, 1, 1 ) ) ), "Passed!" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Plane( new Vector3( 1, 0, 0 ), 0 );
				var b = new Plane( new Vector3( 1, 0, 0 ), 1 );
				var c = new Plane( new Vector3( 0, 1, 0 ), 0 );

				assert.ok( a.normal.equals( b.normal ), "Normals: equal" );
				assert.notOk( a.normal.equals( c.normal ), "Normals: not equal" );

				assert.notStrictEqual( a.constant, b.constant, "Constants: not equal" );
				assert.strictEqual( a.constant, c.constant, "Constants: equal" );

				assert.notOk( a.equals( b ), "Planes: not equal" );
				assert.notOk( a.equals( c ), "Planes: not equal" );

				a.copy( b );
				assert.ok( a.normal.equals( b.normal ), "Normals after copy(): equal" );
				assert.strictEqual( a.constant, b.constant, "Constants after copy(): equal" );
				assert.ok( a.equals( b ), "Planes after copy(): equal" );

			} );

		} );

	} );

	QUnit.module( "Plane" );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author tschw
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	const orders = [ 'XYZ', 'YXZ', 'ZXY', 'ZYX', 'YZX', 'XZY' ];
	const eulerAngles = new Euler( 0.1, - 0.3, 0.25 );

	function qSub( a, b ) {

		var result = new Quaternion();
		result.copy( a );

		result.x -= b.x;
		result.y -= b.y;
		result.z -= b.z;
		result.w -= b.w;

		return result;

	}

	function doSlerpObject( aArr, bArr, t ) {

		var a = new Quaternion().fromArray( aArr ),
			b = new Quaternion().fromArray( bArr ),
			c = new Quaternion().fromArray( aArr );

		c.slerp( b, t );

		return {

			equals: function ( x$$1, y$$1, z$$1, w$$1, maxError ) {

				if ( maxError === undefined ) maxError = Number.EPSILON;

				return Math.abs( x$$1 - c.x ) <= maxError &&
					Math.abs( y$$1 - c.y ) <= maxError &&
					Math.abs( z$$1 - c.z ) <= maxError &&
					Math.abs( w$$1 - c.w ) <= maxError;

			},

			length: c.length(),

			dotA: c.dot( a ),
			dotB: c.dot( b )

		};

	}

	function doSlerpArray( a, b, t ) {

		var result = [ 0, 0, 0, 0 ];

		Quaternion.slerpFlat( result, 0, a, 0, b, 0, t );

		function arrDot( a, b ) {

			return a[ 0 ] * b[ 0 ] + a[ 1 ] * b[ 1 ] +
				a[ 2 ] * b[ 2 ] + a[ 3 ] * b[ 3 ];

		}

		return {

			equals: function ( x$$1, y$$1, z$$1, w$$1, maxError ) {

				if ( maxError === undefined ) maxError = Number.EPSILON;

				return Math.abs( x$$1 - result[ 0 ] ) <= maxError &&
					Math.abs( y$$1 - result[ 1 ] ) <= maxError &&
					Math.abs( z$$1 - result[ 2 ] ) <= maxError &&
					Math.abs( w$$1 - result[ 3 ] ) <= maxError;

			},

			length: Math.sqrt( arrDot( result, result ) ),

			dotA: arrDot( result, a ),
			dotB: arrDot( result, b )

		};

	}

	function slerpTestSkeleton( doSlerp, maxError, assert ) {

		var a, b, result;

		a = [
			0.6753410084407496,
			0.4087830051091744,
			0.32856700410659473,
			0.5185120064806223
		];

		b = [
			0.6602792107657797,
			0.43647413932562285,
			0.35119011210236006,
			0.5001871596632682
		];

		var maxNormError = 0;

		function isNormal( result ) {

			var normError = Math.abs( 1 - result.length );
			maxNormError = Math.max( maxNormError, normError );
			return normError <= maxError;

		}

		result = doSlerp( a, b, 0 );
		assert.ok( result.equals(
			a[ 0 ], a[ 1 ], a[ 2 ], a[ 3 ], 0 ), "Exactly A @ t = 0" );

		result = doSlerp( a, b, 1 );
		assert.ok( result.equals(
			b[ 0 ], b[ 1 ], b[ 2 ], b[ 3 ], 0 ), "Exactly B @ t = 1" );

		result = doSlerp( a, b, 0.5 );
		assert.ok( Math.abs( result.dotA - result.dotB ) <= Number.EPSILON, "Symmetry at 0.5" );
		assert.ok( isNormal( result ), "Approximately normal (at 0.5)" );

		result = doSlerp( a, b, 0.25 );
		assert.ok( result.dotA > result.dotB, "Interpolating at 0.25" );
		assert.ok( isNormal( result ), "Approximately normal (at 0.25)" );

		result = doSlerp( a, b, 0.75 );
		assert.ok( result.dotA < result.dotB, "Interpolating at 0.75" );
		assert.ok( isNormal( result ), "Approximately normal (at 0.75)" );

		var D = Math.SQRT1_2;

		result = doSlerp( [ 1, 0, 0, 0 ], [ 0, 0, 1, 0 ], 0.5 );
		assert.ok( result.equals( D, 0, D, 0 ), "X/Z diagonal from axes" );
		assert.ok( isNormal( result ), "Approximately normal (X/Z diagonal)" );

		result = doSlerp( [ 0, D, 0, D ], [ 0, - D, 0, D ], 0.5 );
		assert.ok( result.equals( 0, 0, 0, 1 ), "W-Unit from diagonals" );
		assert.ok( isNormal( result ), "Approximately normal (W-Unit)" );

	}

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Quaternion', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Quaternion();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 1, "Passed!" );

				var a = new Quaternion( x, y, z, w );
				assert.ok( a.x === x, "Passed!" );
				assert.ok( a.y === y, "Passed!" );
				assert.ok( a.z === z, "Passed!" );
				assert.ok( a.w === w, "Passed!" );

			} );

			// STATIC STUFF
			QUnit.test( "slerp", ( assert ) => {

				slerpTestSkeleton( doSlerpObject, Number.EPSILON, assert );

			} );

			QUnit.test( "slerpFlat", ( assert ) => {

				slerpTestSkeleton( doSlerpArray, Number.EPSILON, assert );

			} );

			// PROPERTIES
			QUnit.test( "properties", ( assert ) => {

				assert.expect( 8 );

				var a = new Quaternion();
				a.onChange( function () {

					assert.ok( true, "onChange called" );

				} );

				a.x = x;
				a.y = y;
				a.z = z;
				a.w = w;

				assert.strictEqual( a.x, x, "Check x" );
				assert.strictEqual( a.y, y, "Check y" );
				assert.strictEqual( a.z, z, "Check z" );
				assert.strictEqual( a.w, w, "Check w" );

			} );

			QUnit.test( "x", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "y", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "z", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "w", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Quaternion();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 1, "Passed!" );

				a.set( x, y, z, w );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z === z, "Passed!" );
				assert.ok( a.w === w, "Passed!" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Quaternion( x, y, z, w );
				var b = new Quaternion().copy( a );
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );
				assert.ok( b.z == z, "Passed!" );
				assert.ok( b.w == w, "Passed!" );

				// ensure that it is a true copy
				a.x = 0;
				a.y = - 1;
				a.z = 0;
				a.w = - 1;
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );

			} );

			QUnit.test( "setFromEuler/setFromQuaternion", ( assert ) => {

				var angles = [ new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ) ];

				// ensure euler conversion to/from Quaternion matches.
				for ( var i = 0; i < orders.length; i ++ ) {

					for ( var j = 0; j < angles.length; j ++ ) {

						var eulers2 = new Euler().setFromQuaternion( new Quaternion().setFromEuler( new Euler( angles[ j ].x, angles[ j ].y, angles[ j ].z, orders[ i ] ) ), orders[ i ] );
						var newAngle = new Vector3( eulers2.x, eulers2.y, eulers2.z );
						assert.ok( newAngle.distanceTo( angles[ j ] ) < 0.001, "Passed!" );

					}

				}

			} );

			QUnit.test( "setFromAxisAngle", ( assert ) => {

				// TODO: find cases to validate.
				// assert.ok( true, "Passed!" );

				var zero = new Quaternion();

				var a = new Quaternion().setFromAxisAngle( new Vector3( 1, 0, 0 ), 0 );
				assert.ok( a.equals( zero ), "Passed!" );
				a = new Quaternion().setFromAxisAngle( new Vector3( 0, 1, 0 ), 0 );
				assert.ok( a.equals( zero ), "Passed!" );
				a = new Quaternion().setFromAxisAngle( new Vector3( 0, 0, 1 ), 0 );
				assert.ok( a.equals( zero ), "Passed!" );

				var b1 = new Quaternion().setFromAxisAngle( new Vector3( 1, 0, 0 ), Math.PI );
				assert.ok( ! a.equals( b1 ), "Passed!" );
				var b2 = new Quaternion().setFromAxisAngle( new Vector3( 1, 0, 0 ), - Math.PI );
				assert.ok( ! a.equals( b2 ), "Passed!" );

				b1.multiply( b2 );
				assert.ok( a.equals( b1 ), "Passed!" );

			} );

			QUnit.test( "setFromEuler/setFromRotationMatrix", ( assert ) => {

				// ensure euler conversion for Quaternion matches that of Matrix4
				for ( var i = 0; i < orders.length; i ++ ) {

					var q = new Quaternion().setFromEuler( eulerAngles, orders[ i ] );
					var m = new Matrix4().makeRotationFromEuler( eulerAngles, orders[ i ] );
					var q2 = new Quaternion().setFromRotationMatrix( m );

					assert.ok( qSub( q, q2 ).length() < 0.001, "Passed!" );

				}

			} );

			QUnit.test( "setFromRotationMatrix", ( assert ) => {

				// contrived examples purely to please the god of code coverage...
				// match conditions in various 'else [if]' blocks

				var a = new Quaternion();
				var q = new Quaternion( - 9, - 2, 3, - 4 ).normalize();
				var m = new Matrix4().makeRotationFromQuaternion( q );
				var expected = new Vector4( 0.8581163303210332, 0.19069251784911848, - 0.2860387767736777, 0.38138503569823695 );

				a.setFromRotationMatrix( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "m11 > m22 && m11 > m33: check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "m11 > m22 && m11 > m33: check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "m11 > m22 && m11 > m33: check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "m11 > m22 && m11 > m33: check w" );

				var q = new Quaternion( - 1, - 2, 1, - 1 ).normalize();
				m.makeRotationFromQuaternion( q );
				var expected = new Vector4( 0.37796447300922714, 0.7559289460184544, - 0.37796447300922714, 0.37796447300922714 );

				a.setFromRotationMatrix( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "m22 > m33: check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "m22 > m33: check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "m22 > m33: check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "m22 > m33: check w" );

			} );

			QUnit.test( "setFromUnitVectors", ( assert ) => {

				var a = new Quaternion();
				var b = new Vector3( 1, 0, 0 );
				var c = new Vector3( 0, 1, 0 );
				var expected = new Quaternion( 0, 0, Math.sqrt( 2 ) / 2, Math.sqrt( 2 ) / 2 );

				a.setFromUnitVectors( b, c );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "Check w" );

			} );

			QUnit.test( "inverse/conjugate", ( assert ) => {

				var a = new Quaternion( x, y, z, w );

				// TODO: add better validation here.

				var b = a.clone().conjugate();

				assert.ok( a.x == - b.x, "Passed!" );
				assert.ok( a.y == - b.y, "Passed!" );
				assert.ok( a.z == - b.z, "Passed!" );
				assert.ok( a.w == b.w, "Passed!" );

			} );

			QUnit.test( "inverse", ( assert ) => {

				assert.expect( 6 );

				var a = new Quaternion( x, y, z, w );
				var inverted = new Quaternion( - 0.2721655269759087, - 0.408248290463863, - 0.5443310539518174, 0.6804138174397717 );
				a.onChange( function () {

					assert.ok( true, "onChange called" );

				} );

				a.inverse();
				assert.ok( Math.abs( a.x - inverted.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - inverted.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - inverted.z ) <= eps, "Check z" );
				assert.ok( Math.abs( a.w - inverted.w ) <= eps, "Check w" );

			} );

			QUnit.test( "dot", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "normalize/length/lengthSq", ( assert ) => {

				var a = new Quaternion( x, y, z, w );
				var b = new Quaternion( - x, - y, - z, - w );

				assert.ok( a.length() != 1, "Passed!" );
				assert.ok( a.lengthSq() != 1, "Passed!" );
				a.normalize();
				assert.ok( a.length() == 1, "Passed!" );
				assert.ok( a.lengthSq() == 1, "Passed!" );

				a.set( 0, 0, 0, 0 );
				assert.ok( a.lengthSq() == 0, "Passed!" );
				assert.ok( a.length() == 0, "Passed!" );
				a.normalize();
				assert.ok( a.lengthSq() == 1, "Passed!" );
				assert.ok( a.length() == 1, "Passed!" );

			} );

			QUnit.test( "multiplyQuaternions/multiply", ( assert ) => {

				var angles = [ new Euler( 1, 0, 0 ), new Euler( 0, 1, 0 ), new Euler( 0, 0, 1 ) ];

				var q1 = new Quaternion().setFromEuler( angles[ 0 ], "XYZ" );
				var q2 = new Quaternion().setFromEuler( angles[ 1 ], "XYZ" );
				var q3 = new Quaternion().setFromEuler( angles[ 2 ], "XYZ" );

				var q = new Quaternion().multiplyQuaternions( q1, q2 ).multiply( q3 );

				var m1 = new Matrix4().makeRotationFromEuler( angles[ 0 ], "XYZ" );
				var m2 = new Matrix4().makeRotationFromEuler( angles[ 1 ], "XYZ" );
				var m3 = new Matrix4().makeRotationFromEuler( angles[ 2 ], "XYZ" );

				var m = new Matrix4().multiplyMatrices( m1, m2 ).multiply( m3 );

				var qFromM = new Quaternion().setFromRotationMatrix( m );

				assert.ok( qSub( q, qFromM ).length() < 0.001, "Passed!" );

			} );

			QUnit.test( "premultiply", ( assert ) => {

				var a = new Quaternion( x, y, z, w );
				var b = new Quaternion( 2 * x, - y, - 2 * z, w );
				var expected = new Quaternion( 42, - 32, - 2, 58 );

				a.premultiply( b );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "Check w" );

			} );

			QUnit.test( "slerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Quaternion( x, y, z, w );
				var b = new Quaternion( - x, - y, - z, - w );

				assert.ok( a.x != b.x, "Passed!" );
				assert.ok( a.y != b.y, "Passed!" );

				assert.ok( ! a.equals( b ), "Passed!" );
				assert.ok( ! b.equals( a ), "Passed!" );

				a.copy( b );
				assert.ok( a.x == b.x, "Passed!" );
				assert.ok( a.y == b.y, "Passed!" );

				assert.ok( a.equals( b ), "Passed!" );
				assert.ok( b.equals( a ), "Passed!" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var a = new Quaternion( x, y, z, w );

				var array = a.toArray();
				assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "No array, no offset: check z" );
				assert.strictEqual( array[ 3 ], w, "No array, no offset: check w" );

				var array = [];
				a.toArray( array );
				assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "With array, no offset: check z" );
				assert.strictEqual( array[ 3 ], w, "With array, no offset: check w" );

				var array = [];
				a.toArray( array, 1 );
				assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
				assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
				assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );
				assert.strictEqual( array[ 3 ], z, "With array and offset: check z" );
				assert.strictEqual( array[ 4 ], w, "With array and offset: check w" );

			} );

			QUnit.test( "onChange", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "onChangeCallback", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// OTHERS
			QUnit.test( "multiplyVector3", ( assert ) => {

				var angles = [ new Euler( 1, 0, 0 ), new Euler( 0, 1, 0 ), new Euler( 0, 0, 1 ) ];

				// ensure euler conversion for Quaternion matches that of Matrix4
				for ( var i = 0; i < orders.length; i ++ ) {

					for ( var j = 0; j < angles.length; j ++ ) {

						var q = new Quaternion().setFromEuler( angles[ j ], orders[ i ] );
						var m = new Matrix4().makeRotationFromEuler( angles[ j ], orders[ i ] );

						var v0 = new Vector3( 1, 0, 0 );
						var qv = v0.clone().applyQuaternion( q );
						var mv = v0.clone().applyMatrix4( m );

						assert.ok( qv.distanceTo( mv ) < 0.001, "Passed!" );

					}

				}

			} );

		} );

	} );

	QUnit.module( "Quaternion" );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Ray', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Ray();
				assert.ok( a.origin.equals( zero3 ), "Passed!" );
				assert.ok( a.direction.equals( zero3 ), "Passed!" );

				var a = new Ray( two3.clone(), one3.clone() );
				assert.ok( a.origin.equals( two3 ), "Passed!" );
				assert.ok( a.direction.equals( one3 ), "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isRay", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Ray();

				a.set( one3, one3 );
				assert.ok( a.origin.equals( one3 ), "Passed!" );
				assert.ok( a.direction.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "recast/clone", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				assert.ok( a.recast( 0 ).equals( a ), "Passed!" );

				var b = a.clone();
				assert.ok( b.recast( - 1 ).equals( new Ray( new Vector3( 1, 1, 0 ), new Vector3( 0, 0, 1 ) ) ), "Passed!" );

				var c = a.clone();
				assert.ok( c.recast( 1 ).equals( new Ray( new Vector3( 1, 1, 2 ), new Vector3( 0, 0, 1 ) ) ), "Passed!" );

				var d = a.clone();
				var e = d.clone().recast( 1 );
				assert.ok( d.equals( a ), "Passed!" );
				assert.ok( ! e.equals( d ), "Passed!" );
				assert.ok( e.equals( c ), "Passed!" );

			} );

			QUnit.test( "copy/equals", ( assert ) => {

				var a = new Ray( zero3.clone(), one3.clone() );
				var b = new Ray().copy( a );
				assert.ok( b.origin.equals( zero3 ), "Passed!" );
				assert.ok( b.direction.equals( one3 ), "Passed!" );

				// ensure that it is a true copy
				a.origin = zero3;
				a.direction = one3;
				assert.ok( b.origin.equals( zero3 ), "Passed!" );
				assert.ok( b.direction.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "at", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				assert.ok( a.at( 0 ).equals( one3 ), "Passed!" );
				assert.ok( a.at( - 1 ).equals( new Vector3( 1, 1, 0 ) ), "Passed!" );
				assert.ok( a.at( 1 ).equals( new Vector3( 1, 1, 2 ) ), "Passed!" );

			} );

			QUnit.test( "lookAt", ( assert ) => {

				var a = new Ray( two3.clone(), one3.clone() );
				var target = one3.clone();
				var expected = target.sub( two3 ).normalize();

				a.lookAt( target );
				assert.ok( a.direction.equals( expected ), "Check if we're looking in the right direction" );

			} );

			QUnit.test( "closestPointToPoint", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				// behind the ray
				var b = a.closestPointToPoint( zero3 );
				assert.ok( b.equals( one3 ), "Passed!" );

				// front of the ray
				var c = a.closestPointToPoint( new Vector3( 0, 0, 50 ) );
				assert.ok( c.equals( new Vector3( 1, 1, 50 ) ), "Passed!" );

				// exactly on the ray
				var d = a.closestPointToPoint( one3 );
				assert.ok( d.equals( one3 ), "Passed!" );

			} );

			QUnit.test( "distanceToPoint", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				// behind the ray
				var b = a.distanceToPoint( zero3 );
				assert.ok( b === Math.sqrt( 3 ), "Passed!" );

				// front of the ray
				var c = a.distanceToPoint( new Vector3( 0, 0, 50 ) );
				assert.ok( c === Math.sqrt( 2 ), "Passed!" );

				// exactly on the ray
				var d = a.distanceToPoint( one3 );
				assert.ok( d === 0, "Passed!" );

			} );

			QUnit.test( "distanceSqToPoint", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				// behind the ray
				var b = a.distanceSqToPoint( zero3 );
				assert.ok( b === 3, "Passed!" );

				// front of the ray
				var c = a.distanceSqToPoint( new Vector3( 0, 0, 50 ) );
				assert.ok( c === 2, "Passed!" );

				// exactly on the ray
				var d = a.distanceSqToPoint( one3 );
				assert.ok( d === 0, "Passed!" );

			} );

			QUnit.test( "distanceSqToSegment", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );
				var ptOnLine = new Vector3();
				var ptOnSegment = new Vector3();

				//segment in front of the ray
				var v0 = new Vector3( 3, 5, 50 );
				var v1 = new Vector3( 50, 50, 50 ); // just a far away point
				var distSqr = a.distanceSqToSegment( v0, v1, ptOnLine, ptOnSegment );

				assert.ok( ptOnSegment.distanceTo( v0 ) < 0.0001, "Passed!" );
				assert.ok( ptOnLine.distanceTo( new Vector3( 1, 1, 50 ) ) < 0.0001, "Passed!" );
				// ((3-1) * (3-1) + (5-1) * (5-1) = 4 + 16 = 20
				assert.ok( Math.abs( distSqr - 20 ) < 0.0001, "Passed!" );

				//segment behind the ray
				var v0 = new Vector3( - 50, - 50, - 50 ); // just a far away point
				var v1 = new Vector3( - 3, - 5, - 4 );
				var distSqr = a.distanceSqToSegment( v0, v1, ptOnLine, ptOnSegment );

				assert.ok( ptOnSegment.distanceTo( v1 ) < 0.0001, "Passed!" );
				assert.ok( ptOnLine.distanceTo( one3 ) < 0.0001, "Passed!" );
				// ((-3-1) * (-3-1) + (-5-1) * (-5-1) + (-4-1) + (-4-1) = 16 + 36 + 25 = 77
				assert.ok( Math.abs( distSqr - 77 ) < 0.0001, "Passed!" );

				//exact intersection between the ray and the segment
				var v0 = new Vector3( - 50, - 50, - 50 );
				var v1 = new Vector3( 50, 50, 50 );
				var distSqr = a.distanceSqToSegment( v0, v1, ptOnLine, ptOnSegment );

				assert.ok( ptOnSegment.distanceTo( one3 ) < 0.0001, "Passed!" );
				assert.ok( ptOnLine.distanceTo( one3 ) < 0.0001, "Passed!" );
				assert.ok( distSqr < 0.0001, "Passed!" );

			} );

			QUnit.test( "intersectSphere", ( assert ) => {

				var TOL = 0.0001;

				// ray a0 origin located at ( 0, 0, 0 ) and points outward in negative-z direction
				var a0 = new Ray( zero3.clone(), new Vector3( 0, 0, - 1 ) );
				// ray a1 origin located at ( 1, 1, 1 ) and points left in negative-x direction
				var a1 = new Ray( one3.clone(), new Vector3( - 1, 0, 0 ) );

				// sphere (radius of 2) located behind ray a0, should result in null
				var b = new Sphere( new Vector3( 0, 0, 3 ), 2 );
				assert.ok( a0.intersectSphere( b ) === null, "Passed!" );

				// sphere (radius of 2) located in front of, but too far right of ray a0, should result in null
				var b = new Sphere( new Vector3( 3, 0, - 1 ), 2 );
				assert.ok( a0.intersectSphere( b ) === null, "Passed!" );

				// sphere (radius of 2) located below ray a1, should result in null
				var b = new Sphere( new Vector3( 1, - 2, 1 ), 2 );
				assert.ok( a1.intersectSphere( b ) === null, "Passed!" );

				// sphere (radius of 1) located to the left of ray a1, should result in intersection at 0, 1, 1
				var b = new Sphere( new Vector3( - 1, 1, 1 ), 1 );
				assert.ok( a1.intersectSphere( b ).distanceTo( new Vector3( 0, 1, 1 ) ) < TOL, "Passed!" );

				// sphere (radius of 1) located in front of ray a0, should result in intersection at 0, 0, -1
				var b = new Sphere( new Vector3( 0, 0, - 2 ), 1 );
				assert.ok( a0.intersectSphere( b ).distanceTo( new Vector3( 0, 0, - 1 ) ) < TOL, "Passed!" );

				// sphere (radius of 2) located in front & right of ray a0, should result in intersection at 0, 0, -1, or left-most edge of sphere
				var b = new Sphere( new Vector3( 2, 0, - 1 ), 2 );
				assert.ok( a0.intersectSphere( b ).distanceTo( new Vector3( 0, 0, - 1 ) ) < TOL, "Passed!" );

				// same situation as above, but move the sphere a fraction more to the right, and ray a0 should now just miss
				var b = new Sphere( new Vector3( 2.01, 0, - 1 ), 2 );
				assert.ok( a0.intersectSphere( b ) === null, "Passed!" );

				// following QUnit.tests are for situations where the ray origin is inside the sphere

				// sphere (radius of 1) center located at ray a0 origin / sphere surrounds the ray origin, so the first intersect point 0, 0, 1,
				// is behind ray a0.  Therefore, second exit point on back of sphere will be returned: 0, 0, -1
				// thus keeping the intersection point always in front of the ray.
				var b = new Sphere( zero3.clone(), 1 );
				assert.ok( a0.intersectSphere( b ).distanceTo( new Vector3( 0, 0, - 1 ) ) < TOL, "Passed!" );

				// sphere (radius of 4) center located behind ray a0 origin / sphere surrounds the ray origin, so the first intersect point 0, 0, 5,
				// is behind ray a0.  Therefore, second exit point on back of sphere will be returned: 0, 0, -3
				// thus keeping the intersection point always in front of the ray.
				var b = new Sphere( new Vector3( 0, 0, 1 ), 4 );
				assert.ok( a0.intersectSphere( b ).distanceTo( new Vector3( 0, 0, - 3 ) ) < TOL, "Passed!" );

				// sphere (radius of 4) center located in front of ray a0 origin / sphere surrounds the ray origin, so the first intersect point 0, 0, 3,
				// is behind ray a0.  Therefore, second exit point on back of sphere will be returned: 0, 0, -5
				// thus keeping the intersection point always in front of the ray.
				var b = new Sphere( new Vector3( 0, 0, - 1 ), 4 );
				assert.ok( a0.intersectSphere( b ).distanceTo( new Vector3( 0, 0, - 5 ) ) < TOL, "Passed!" );

			} );

			QUnit.test( "intersectsSphere", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );
				var b = new Sphere( zero3, 0.5 );
				var c = new Sphere( zero3, 1.5 );
				var d = new Sphere( one3, 0.1 );
				var e = new Sphere( two3, 0.1 );
				var f = new Sphere( two3, 1 );

				assert.ok( ! a.intersectsSphere( b ), "Passed!" );
				assert.ok( ! a.intersectsSphere( c ), "Passed!" );
				assert.ok( a.intersectsSphere( d ), "Passed!" );
				assert.ok( ! a.intersectsSphere( e ), "Passed!" );
				assert.ok( ! a.intersectsSphere( f ), "Passed!" );

			} );

			QUnit.test( "distanceToPlane", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "intersectPlane", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				// parallel plane behind
				var b = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 0, 0, 1 ), new Vector3( 1, 1, - 1 ) );
				assert.ok( a.intersectPlane( b ) === null, "Passed!" );

				// parallel plane coincident with origin
				var c = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 0, 0, 1 ), new Vector3( 1, 1, 0 ) );
				assert.ok( a.intersectPlane( c ) === null, "Passed!" );

				// parallel plane infront
				var d = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 0, 0, 1 ), new Vector3( 1, 1, 1 ) );
				assert.ok( a.intersectPlane( d ).equals( a.origin ), "Passed!" );

				// perpendical ray that overlaps exactly
				var e = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 1, 0, 0 ), one3 );
				assert.ok( a.intersectPlane( e ).equals( a.origin ), "Passed!" );

				// perpendical ray that doesn't overlap
				var f = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 1, 0, 0 ), zero3 );
				assert.ok( a.intersectPlane( f ) === null, "Passed!" );

			} );

			QUnit.test( "intersectsPlane", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );

				// parallel plane in front of the ray
				var b = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 0, 0, 1 ), one3.clone().sub( new Vector3( 0, 0, - 1 ) ) );
				assert.ok( a.intersectsPlane( b ), "Passed!" );

				// parallel plane coincident with origin
				var c = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 0, 0, 1 ), one3.clone().sub( new Vector3( 0, 0, 0 ) ) );
				assert.ok( a.intersectsPlane( c ), "Passed!" );

				// parallel plane behind the ray
				var d = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 0, 0, 1 ), one3.clone().sub( new Vector3( 0, 0, 1 ) ) );
				assert.ok( ! a.intersectsPlane( d ), "Passed!" );

				// perpendical ray that overlaps exactly
				var e = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 1, 0, 0 ), one3 );
				assert.ok( a.intersectsPlane( e ), "Passed!" );

				// perpendical ray that doesn't overlap
				var f = new Plane().setFromNormalAndCoplanarPoint( new Vector3( 1, 0, 0 ), zero3 );
				assert.ok( ! a.intersectsPlane( f ), "Passed!" );

			} );

			QUnit.test( "intersectBox", ( assert ) => {

				var TOL = 0.0001;

				var box = new Box3( new Vector3( - 1, - 1, - 1 ), new Vector3( 1, 1, 1 ) );

				var a = new Ray( new Vector3( - 2, 0, 0 ), new Vector3( 1, 0, 0 ) );
				//ray should intersect box at -1,0,0
				assert.ok( a.intersectsBox( box ) === true, "Passed!" );
				assert.ok( a.intersectBox( box ).distanceTo( new Vector3( - 1, 0, 0 ) ) < TOL, "Passed!" );

				var b = new Ray( new Vector3( - 2, 0, 0 ), new Vector3( - 1, 0, 0 ) );
				//ray is point away from box, it should not intersect
				assert.ok( b.intersectsBox( box ) === false, "Passed!" );
				assert.ok( b.intersectBox( box ) === null, "Passed!" );

				var c = new Ray( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ) );
				// ray is inside box, should return exit point
				assert.ok( c.intersectsBox( box ) === true, "Passed!" );
				assert.ok( c.intersectBox( box ).distanceTo( new Vector3( 1, 0, 0 ) ) < TOL, "Passed!" );

				var d = new Ray( new Vector3( 0, 2, 1 ), new Vector3( 0, - 1, - 1 ).normalize() );
				//tilted ray should intersect box at 0,1,0
				assert.ok( d.intersectsBox( box ) === true, "Passed!" );
				assert.ok( d.intersectBox( box ).distanceTo( new Vector3( 0, 1, 0 ) ) < TOL, "Passed!" );

				var e = new Ray( new Vector3( 1, - 2, 1 ), new Vector3( 0, 1, 0 ).normalize() );
				//handle case where ray is coplanar with one of the boxes side - box in front of ray
				assert.ok( e.intersectsBox( box ) === true, "Passed!" );
				assert.ok( e.intersectBox( box ).distanceTo( new Vector3( 1, - 1, 1 ) ) < TOL, "Passed!" );

				var f = new Ray( new Vector3( 1, - 2, 0 ), new Vector3( 0, - 1, 0 ).normalize() );
				//handle case where ray is coplanar with one of the boxes side - box behind ray
				assert.ok( f.intersectsBox( box ) === false, "Passed!" );
				assert.ok( f.intersectBox( box ) == null, "Passed!" );

			} );

			QUnit.test( "intersectsBox", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "intersectTriangle", ( assert ) => {

				var ray = new Ray();
				var a = new Vector3( 1, 1, 0 );
				var b = new Vector3( 0, 1, 1 );
				var c = new Vector3( 1, 0, 1 );
				var intersect;

				// DdN == 0
				ray.set( ray.origin, zero3.clone() );
				intersect = ray.intersectTriangle( a, b, c, false );
				assert.strictEqual( intersect, null, "No intersection if direction == zero" );

				// DdN > 0, backfaceCulling = true
				ray.set( ray.origin, one3.clone() );
				intersect = ray.intersectTriangle( a, b, c, true );
				assert.strictEqual( intersect, null, "No intersection with backside faces if backfaceCulling is true" );

				// DdN > 0
				ray.set( ray.origin, one3.clone() );
				intersect = ray.intersectTriangle( a, b, c, false );
				assert.ok( Math.abs( intersect.x - 2 / 3 ) <= eps, "Successful intersection: check x" );
				assert.ok( Math.abs( intersect.y - 2 / 3 ) <= eps, "Successful intersection: check y" );
				assert.ok( Math.abs( intersect.z - 2 / 3 ) <= eps, "Successful intersection: check z" );

				// DdN > 0, DdQxE2 < 0
				b.multiplyScalar( - 1 );
				intersect = ray.intersectTriangle( a, b, c, false );
				assert.strictEqual( intersect, null, "No intersection" );

				// DdN > 0, DdE1xQ < 0
				a.multiplyScalar( - 1 );
				intersect = ray.intersectTriangle( a, b, c, false );
				assert.strictEqual( intersect, null, "No intersection" );

				// DdN > 0, DdQxE2 + DdE1xQ > DdN
				b.multiplyScalar( - 1 );
				intersect = ray.intersectTriangle( a, b, c, false );
				assert.strictEqual( intersect, null, "No intersection" );

				// DdN < 0, QdN < 0
				a.multiplyScalar( - 1 );
				b.multiplyScalar( - 1 );
				ray.direction.multiplyScalar( - 1 );
				intersect = ray.intersectTriangle( a, b, c, false );
				assert.strictEqual( intersect, null, "No intersection when looking in the wrong direction" );

			} );

			QUnit.test( "applyMatrix4", ( assert ) => {

				var a = new Ray( one3.clone(), new Vector3( 0, 0, 1 ) );
				var m = new Matrix4();

				assert.ok( a.clone().applyMatrix4( m ).equals( a ), "Passed!" );

				var a = new Ray( zero3.clone(), new Vector3( 0, 0, 1 ) );
				m.makeRotationZ( Math.PI );
				assert.ok( a.clone().applyMatrix4( m ).equals( a ), "Passed!" );

				m.makeRotationX( Math.PI );
				var b = a.clone();
				b.direction.negate();
				var a2 = a.clone().applyMatrix4( m );
				assert.ok( a2.origin.distanceTo( b.origin ) < 0.0001, "Passed!" );
				assert.ok( a2.direction.distanceTo( b.direction ) < 0.0001, "Passed!" );

				a.origin = new Vector3( 0, 0, 1 );
				b.origin = new Vector3( 0, 0, - 1 );
				var a2 = a.clone().applyMatrix4( m );
				assert.ok( a2.origin.distanceTo( b.origin ) < 0.0001, "Passed!" );
				assert.ok( a2.direction.distanceTo( b.direction ) < 0.0001, "Passed!" );

			} );

			QUnit.test( "equals", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Sphere', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Sphere();
				assert.ok( a.center.equals( zero3 ), "Passed!" );
				assert.ok( a.radius == 0, "Passed!" );

				var a = new Sphere( one3.clone(), 1 );
				assert.ok( a.center.equals( one3 ), "Passed!" );
				assert.ok( a.radius == 1, "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSphere", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Sphere();
				assert.ok( a.center.equals( zero3 ), "Passed!" );
				assert.ok( a.radius == 0, "Passed!" );

				a.set( one3, 1 );
				assert.ok( a.center.equals( one3 ), "Passed!" );
				assert.ok( a.radius == 1, "Passed!" );

			} );

			QUnit.test( "setFromPoints", ( assert ) => {

				var a = new Sphere();
				var expectedCenter = new Vector3( 0.9330126941204071, 0, 0 );
				var expectedRadius = 1.3676668773461689;
				var optionalCenter = new Vector3( 1, 1, 1 );
				var points = [
					new Vector3( 1, 1, 0 ), new Vector3( 1, 1, 0 ),
					new Vector3( 1, 1, 0 ), new Vector3( 1, 1, 0 ),
					new Vector3( 1, 1, 0 ), new Vector3( 0.8660253882408142, 0.5, 0 ),
					new Vector3( - 0, 0.5, 0.8660253882408142 ), new Vector3( 1.8660253882408142, 0.5, 0 ),
					new Vector3( 0, 0.5, - 0.8660253882408142 ), new Vector3( 0.8660253882408142, 0.5, - 0 ),
					new Vector3( 0.8660253882408142, - 0.5, 0 ), new Vector3( - 0, - 0.5, 0.8660253882408142 ),
					new Vector3( 1.8660253882408142, - 0.5, 0 ), new Vector3( 0, - 0.5, - 0.8660253882408142 ),
					new Vector3( 0.8660253882408142, - 0.5, - 0 ), new Vector3( - 0, - 1, 0 ),
					new Vector3( - 0, - 1, 0 ), new Vector3( 0, - 1, 0 ),
					new Vector3( 0, - 1, - 0 ), new Vector3( - 0, - 1, - 0 ),
				];

				a.setFromPoints( points );
				assert.ok( Math.abs( a.center.x - expectedCenter.x ) <= eps, "Default center: check center.x" );
				assert.ok( Math.abs( a.center.y - expectedCenter.y ) <= eps, "Default center: check center.y" );
				assert.ok( Math.abs( a.center.z - expectedCenter.z ) <= eps, "Default center: check center.z" );
				assert.ok( Math.abs( a.radius - expectedRadius ) <= eps, "Default center: check radius" );

				var expectedRadius = 2.5946195770400102;
				a.setFromPoints( points, optionalCenter );
				assert.ok( Math.abs( a.center.x - optionalCenter.x ) <= eps, "Optional center: check center.x" );
				assert.ok( Math.abs( a.center.y - optionalCenter.y ) <= eps, "Optional center: check center.y" );
				assert.ok( Math.abs( a.center.z - optionalCenter.z ) <= eps, "Optional center: check center.z" );
				assert.ok( Math.abs( a.radius - expectedRadius ) <= eps, "Optional center: check radius" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );
				var b = new Sphere().copy( a );

				assert.ok( b.center.equals( one3 ), "Passed!" );
				assert.ok( b.radius == 1, "Passed!" );

				// ensure that it is a true copy
				a.center = zero3;
				a.radius = 0;
				assert.ok( b.center.equals( one3 ), "Passed!" );
				assert.ok( b.radius == 1, "Passed!" );

			} );

			QUnit.test( "empty", ( assert ) => {

				var a = new Sphere();
				assert.ok( a.empty(), "Passed!" );

				a.set( one3, 1 );
				assert.ok( ! a.empty(), "Passed!" );

			} );

			QUnit.test( "containsPoint", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );

				assert.ok( ! a.containsPoint( zero3 ), "Passed!" );
				assert.ok( a.containsPoint( one3 ), "Passed!" );

			} );

			QUnit.test( "distanceToPoint", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );

				assert.ok( ( a.distanceToPoint( zero3 ) - 0.7320 ) < 0.001, "Passed!" );
				assert.ok( a.distanceToPoint( one3 ) === - 1, "Passed!" );

			} );

			QUnit.test( "intersectsSphere", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );
				var b = new Sphere( zero3.clone(), 1 );
				var c = new Sphere( zero3.clone(), 0.25 );

				assert.ok( a.intersectsSphere( b ), "Passed!" );
				assert.ok( ! a.intersectsSphere( c ), "Passed!" );

			} );

			QUnit.test( "intersectsBox", ( assert ) => {

				var a = new Sphere();
				var b = new Sphere( new Vector3( - 5, - 5, - 5 ) );
				var box = new Box3( zero3, one3 );

				assert.strictEqual( a.intersectsBox( box ), true, "Check default sphere" );
				assert.strictEqual( b.intersectsBox( box ), false, "Check shifted sphere" );

			} );

			QUnit.test( "intersectsPlane", ( assert ) => {

				var a = new Sphere( zero3.clone(), 1 );
				var b = new Plane( new Vector3( 0, 1, 0 ), 1 );
				var c = new Plane( new Vector3( 0, 1, 0 ), 1.25 );
				var d = new Plane( new Vector3( 0, - 1, 0 ), 1.25 );

				assert.ok( a.intersectsPlane( b ), "Passed!" );
				assert.ok( ! a.intersectsPlane( c ), "Passed!" );
				assert.ok( ! a.intersectsPlane( d ), "Passed!" );

			} );

			QUnit.test( "clampPoint", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );

				assert.ok( a.clampPoint( new Vector3( 1, 1, 3 ) ).equals( new Vector3( 1, 1, 2 ) ), "Passed!" );
				assert.ok( a.clampPoint( new Vector3( 1, 1, - 3 ) ).equals( new Vector3( 1, 1, 0 ) ), "Passed!" );

			} );

			QUnit.test( "getBoundingBox", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );

				assert.ok( a.getBoundingBox().equals( new Box3( zero3, two3 ) ), "Passed!" );

				a.set( zero3, 0 );
				assert.ok( a.getBoundingBox().equals( new Box3( zero3, zero3 ) ), "Passed!" );

			} );

			QUnit.test( "applyMatrix4", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );
				var m = new Matrix4().makeTranslation( 1, - 2, 1 );

				assert.ok( a.clone().applyMatrix4( m ).getBoundingBox().equals( a.getBoundingBox().applyMatrix4( m ) ), "Passed!" );

			} );

			QUnit.test( "translate", ( assert ) => {

				var a = new Sphere( one3.clone(), 1 );

				a.translate( one3.clone().negate() );
				assert.ok( a.center.equals( zero3 ), "Passed!" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Sphere();
				var b = new Sphere( new Vector3( 1, 0, 0 ) );
				var c = new Sphere( new Vector3( 1, 0, 0 ), 1.0 );

				assert.strictEqual( a.equals( b ), false, "a does not equal b" );
				assert.strictEqual( a.equals( c ), false, "a does not equal c" );
				assert.strictEqual( b.equals( c ), false, "b does not equal c" );

				a.copy( b );
				assert.strictEqual( a.equals( b ), true, "a equals b after copy()" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://clara.io
	 * @author WestLangley / http://github.com/WestLangley
	 *
	 * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
	 *
	 * The poles (phi) are at the positive and negative y axis.
	 * The equator starts at positive z.
	 */

	function Spherical( radius, phi, theta ) {

		this.radius = ( radius !== undefined ) ? radius : 1.0;
		this.phi = ( phi !== undefined ) ? phi : 0; // up / down towards top and bottom pole
		this.theta = ( theta !== undefined ) ? theta : 0; // around the equator of the sphere

		return this;

	}

	Object.assign( Spherical.prototype, {

		set: function ( radius, phi, theta ) {

			this.radius = radius;
			this.phi = phi;
			this.theta = theta;

			return this;

		},

		clone: function () {

			return new this.constructor().copy( this );

		},

		copy: function ( other ) {

			this.radius = other.radius;
			this.phi = other.phi;
			this.theta = other.theta;

			return this;

		},

		// restrict phi to be betwee EPS and PI-EPS
		makeSafe: function () {

			var EPS = 0.000001;
			this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );

			return this;

		},

		setFromVector3: function ( vec3 ) {

			this.radius = vec3.length();

			if ( this.radius === 0 ) {

				this.theta = 0;
				this.phi = 0;

			} else {

				this.theta = Math.atan2( vec3.x, vec3.z ); // equator angle around y-up axis
				this.phi = Math.acos( _Math.clamp( vec3.y / this.radius, - 1, 1 ) ); // polar angle

			}

			return this;

		}

	} );

	/**
	 * @author moraxy / https://github.com/moraxy
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Spherical', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Spherical();
				var radius = 10.0;
				var phi = Math.acos( - 0.5 );
				var theta = Math.sqrt( Math.PI ) * phi;

				assert.strictEqual( a.radius, 1.0, "Default values: check radius" );
				assert.strictEqual( a.phi, 0, "Default values: check phi" );
				assert.strictEqual( a.theta, 0, "Default values: check theta" );

				var a = new Spherical( radius, phi, theta );
				assert.strictEqual( a.radius, radius, "Custom values: check radius" );
				assert.strictEqual( a.phi, phi, "Custom values: check phi" );
				assert.strictEqual( a.theta, theta, "Custom values: check theta" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSpherical", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Spherical();
				var radius = 10.0;
				var phi = Math.acos( - 0.5 );
				var theta = Math.sqrt( Math.PI ) * phi;

				a.set( radius, phi, theta );
				assert.strictEqual( a.radius, radius, "Check radius" );
				assert.strictEqual( a.phi, phi, "Check phi" );
				assert.strictEqual( a.theta, theta, "Check theta" );

			} );

			QUnit.test( "clone", ( assert ) => {

				var radius = 10.0;
				var phi = Math.acos( - 0.5 );
				var theta = Math.sqrt( Math.PI ) * phi;
				var a = new Spherical( radius, phi, theta );
				var b = a.clone();

				assert.propEqual( a, b, "Check a and b are equal after clone()" );

				a.radius = 2.0;
				assert.notPropEqual( a, b, "Check a and b are not equal after modification" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var radius = 10.0;
				var phi = Math.acos( - 0.5 );
				var theta = Math.sqrt( Math.PI ) * phi;
				var a = new Spherical( radius, phi, theta );
				var b = new Spherical().copy( a );

				assert.propEqual( a, b, "Check a and b are equal after copy()" );

				a.radius = 2.0;
				assert.notPropEqual( a, b, "Check a and b are not equal after modification" );

			} );

			QUnit.test( "makeSafe", ( assert ) => {

				var EPS = 0.000001; // from source
				var tooLow = 0.0;
				var tooHigh = Math.PI;
				var justRight = 1.5;
				var a = new Spherical( 1, tooLow, 0 );

				a.makeSafe();
				assert.strictEqual( a.phi, EPS, "Check if small values are set to EPS" );

				a.set( 1, tooHigh, 0 );
				a.makeSafe();
				assert.strictEqual( a.phi, Math.PI - EPS, "Check if high values are set to (Math.PI - EPS)" );

				a.set( 1, justRight, 0 );
				a.makeSafe();
				assert.strictEqual( a.phi, justRight, "Check that valid values don't get changed" );

			} );

			QUnit.test( "setFromVector3", ( assert ) => {

				var a = new Spherical( 1, 1, 1 );
				var b = new Vector3( 0, 0, 0 );
				var c = new Vector3( Math.PI, 1, - Math.PI );
				var expected = new Spherical( 4.554032147688322, 1.3494066171539107, 2.356194490192345 );

				a.setFromVector3( b );
				assert.strictEqual( a.radius, 0, "Zero-length vector: check radius" );
				assert.strictEqual( a.phi, 0, "Zero-length vector: check phi" );
				assert.strictEqual( a.theta, 0, "Zero-length vector: check theta" );

				a.setFromVector3( c );
				assert.ok( Math.abs( a.radius - expected.radius ) <= eps, "Normal vector: check radius" );
				assert.ok( Math.abs( a.phi - expected.phi ) <= eps, "Normal vector: check phi" );
				assert.ok( Math.abs( a.theta - expected.theta ) <= eps, "Normal vector: check theta" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Triangle', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Triangle();
				assert.ok( a.a.equals( zero3 ), "Passed!" );
				assert.ok( a.b.equals( zero3 ), "Passed!" );
				assert.ok( a.c.equals( zero3 ), "Passed!" );

				var a = new Triangle( one3.clone().negate(), one3.clone(), two3.clone() );
				assert.ok( a.a.equals( one3.clone().negate() ), "Passed!" );
				assert.ok( a.b.equals( one3 ), "Passed!" );
				assert.ok( a.c.equals( two3 ), "Passed!" );

			} );

			// STATIC STUFF
			QUnit.test( "normal", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "barycoordFromPoint", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "containsPoint", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "set", ( assert ) => {

				var a = new Triangle();

				a.set( one3.clone().negate(), one3, two3 );
				assert.ok( a.a.equals( one3.clone().negate() ), "Passed!" );
				assert.ok( a.b.equals( one3 ), "Passed!" );
				assert.ok( a.c.equals( two3 ), "Passed!" );

			} );

			QUnit.test( "setFromPointsAndIndices", ( assert ) => {

				var a = new Triangle();

				var points = [ one3, one3.clone().negate(), two3 ];
				a.setFromPointsAndIndices( points, 1, 0, 2 );
				assert.ok( a.a.equals( one3.clone().negate() ), "Passed!" );
				assert.ok( a.b.equals( one3 ), "Passed!" );
				assert.ok( a.c.equals( two3 ), "Passed!" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Triangle( one3.clone().negate(), one3.clone(), two3.clone() );
				var b = new Triangle().copy( a );
				assert.ok( b.a.equals( one3.clone().negate() ), "Passed!" );
				assert.ok( b.b.equals( one3 ), "Passed!" );
				assert.ok( b.c.equals( two3 ), "Passed!" );

				// ensure that it is a true copy
				a.a = one3;
				a.b = zero3;
				a.c = zero3;
				assert.ok( b.a.equals( one3.clone().negate() ), "Passed!" );
				assert.ok( b.b.equals( one3 ), "Passed!" );
				assert.ok( b.c.equals( two3 ), "Passed!" );

			} );

			QUnit.test( "area", ( assert ) => {

				var a = new Triangle();

				assert.ok( a.area() == 0, "Passed!" );

				var a = new Triangle( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );
				assert.ok( a.area() == 0.5, "Passed!" );

				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 0, 0, 2 ) );
				assert.ok( a.area() == 2, "Passed!" );

				// colinear triangle.
				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 3, 0, 0 ) );
				assert.ok( a.area() == 0, "Passed!" );

			} );

			QUnit.test( "midpoint", ( assert ) => {

				var a = new Triangle();

				assert.ok( a.midpoint().equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				var a = new Triangle( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );
				assert.ok( a.midpoint().equals( new Vector3( 1 / 3, 1 / 3, 0 ) ), "Passed!" );

				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 0, 0, 2 ) );
				assert.ok( a.midpoint().equals( new Vector3( 2 / 3, 0, 2 / 3 ) ), "Passed!" );

			} );

			QUnit.test( "normal", ( assert ) => {

				var a = new Triangle();

				assert.ok( a.normal().equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				var a = new Triangle( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );
				assert.ok( a.normal().equals( new Vector3( 0, 0, 1 ) ), "Passed!" );

				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 0, 0, 2 ) );
				assert.ok( a.normal().equals( new Vector3( 0, 1, 0 ) ), "Passed!" );

			} );

			QUnit.test( "plane", ( assert ) => {

				var a = new Triangle();

				assert.notOk( isNaN( a.plane().distanceToPoint( a.a ) ), "Passed!" );
				assert.notOk( isNaN( a.plane().distanceToPoint( a.b ) ), "Passed!" );
				assert.notOk( isNaN( a.plane().distanceToPoint( a.c ) ), "Passed!" );
				assert.notPropEqual( a.plane().normal, {
					x: NaN,
					y: NaN,
					z: NaN
				}, "Passed!" );

				var a = new Triangle( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );
				assert.ok( a.plane().distanceToPoint( a.a ) == 0, "Passed!" );
				assert.ok( a.plane().distanceToPoint( a.b ) == 0, "Passed!" );
				assert.ok( a.plane().distanceToPoint( a.c ) == 0, "Passed!" );
				assert.ok( a.plane().normal.equals( a.normal() ), "Passed!" );

				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 0, 0, 2 ) );
				assert.ok( a.plane().distanceToPoint( a.a ) == 0, "Passed!" );
				assert.ok( a.plane().distanceToPoint( a.b ) == 0, "Passed!" );
				assert.ok( a.plane().distanceToPoint( a.c ) == 0, "Passed!" );
				assert.ok( a.plane().normal.clone().normalize().equals( a.normal() ), "Passed!" );

			} );

			QUnit.test( "barycoordFromPoint", ( assert ) => {

				var a = new Triangle();

				var bad = new Vector3( - 2, - 1, - 1 );

				assert.ok( a.barycoordFromPoint( a.a ).equals( bad ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.b ).equals( bad ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.c ).equals( bad ), "Passed!" );

				var a = new Triangle( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );
				assert.ok( a.barycoordFromPoint( a.a ).equals( new Vector3( 1, 0, 0 ) ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.b ).equals( new Vector3( 0, 1, 0 ) ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.c ).equals( new Vector3( 0, 0, 1 ) ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.midpoint() ).distanceTo( new Vector3( 1 / 3, 1 / 3, 1 / 3 ) ) < 0.0001, "Passed!" );

				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 0, 0, 2 ) );
				assert.ok( a.barycoordFromPoint( a.a ).equals( new Vector3( 1, 0, 0 ) ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.b ).equals( new Vector3( 0, 1, 0 ) ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.c ).equals( new Vector3( 0, 0, 1 ) ), "Passed!" );
				assert.ok( a.barycoordFromPoint( a.midpoint() ).distanceTo( new Vector3( 1 / 3, 1 / 3, 1 / 3 ) ) < 0.0001, "Passed!" );

			} );

			QUnit.test( "containsPoint", ( assert ) => {

				var a = new Triangle();

				assert.ok( ! a.containsPoint( a.a ), "Passed!" );
				assert.ok( ! a.containsPoint( a.b ), "Passed!" );
				assert.ok( ! a.containsPoint( a.c ), "Passed!" );

				var a = new Triangle( new Vector3( 0, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );
				assert.ok( a.containsPoint( a.a ), "Passed!" );
				assert.ok( a.containsPoint( a.b ), "Passed!" );
				assert.ok( a.containsPoint( a.c ), "Passed!" );
				assert.ok( a.containsPoint( a.midpoint() ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( - 1, - 1, - 1 ) ), "Passed!" );

				var a = new Triangle( new Vector3( 2, 0, 0 ), new Vector3( 0, 0, 0 ), new Vector3( 0, 0, 2 ) );
				assert.ok( a.containsPoint( a.a ), "Passed!" );
				assert.ok( a.containsPoint( a.b ), "Passed!" );
				assert.ok( a.containsPoint( a.c ), "Passed!" );
				assert.ok( a.containsPoint( a.midpoint() ), "Passed!" );
				assert.ok( ! a.containsPoint( new Vector3( - 1, - 1, - 1 ) ), "Passed!" );

			} );

			QUnit.test( "closestPointToPoint", ( assert ) => {

				var a = new Triangle( new Vector3( - 1, 0, 0 ), new Vector3( 1, 0, 0 ), new Vector3( 0, 1, 0 ) );

				// point lies inside the triangle
				var b0 = a.closestPointToPoint( new Vector3( 0, 0.5, 0 ) );
				assert.ok( b0.equals( new Vector3( 0, 0.5, 0 ) ), "Passed!" );

				// point lies on a vertex
				var b0 = a.closestPointToPoint( a.a );
				assert.ok( b0.equals( a.a ), "Passed!" );

				var b0 = a.closestPointToPoint( a.b );
				assert.ok( b0.equals( a.b ), "Passed!" );

				var b0 = a.closestPointToPoint( a.c );
				assert.ok( b0.equals( a.c ), "Passed!" );

				// point lies on an edge
				var b0 = a.closestPointToPoint( zero3.clone() );
				assert.ok( b0.equals( zero3.clone() ), "Passed!" );

				// point lies outside the triangle
				var b0 = a.closestPointToPoint( new Vector3( - 2, 0, 0 ) );
				assert.ok( b0.equals( new Vector3( - 1, 0, 0 ) ), "Passed!" );

				var b0 = a.closestPointToPoint( new Vector3( 2, 0, 0 ) );
				assert.ok( b0.equals( new Vector3( 1, 0, 0 ) ), "Passed!" );

				var b0 = a.closestPointToPoint( new Vector3( 0, 2, 0 ) );
				assert.ok( b0.equals( new Vector3( 0, 1, 0 ) ), "Passed!" );

				var b0 = a.closestPointToPoint( new Vector3( 0, - 2, 0 ) );
				assert.ok( b0.equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Triangle(
					new Vector3( 1, 0, 0 ),
					new Vector3( 0, 1, 0 ),
					new Vector3( 0, 0, 1 )
				);
				var b = new Triangle(
					new Vector3( 0, 0, 1 ),
					new Vector3( 0, 1, 0 ),
					new Vector3( 1, 0, 0 )
				);
				var c = new Triangle(
					new Vector3( - 1, 0, 0 ),
					new Vector3( 0, 1, 0 ),
					new Vector3( 0, 0, 1 )
				);

				assert.ok( a.equals( a ), "a equals a" );
				assert.notOk( a.equals( b ), "a does not equal b" );
				assert.notOk( a.equals( c ), "a does not equal c" );
				assert.notOk( b.equals( c ), "b does not equal c" );

				a.copy( b );
				assert.ok( a.equals( a ), "a equals b after copy()" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Vector2', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Vector2();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );

				var a = new Vector2( x, y );
				assert.ok( a.x === x, "Passed!" );
				assert.ok( a.y === y, "Passed!" );

			} );

			// PROPERTIES // ( [Itee] WHAT ??? o_O )
			QUnit.test( "properties", ( assert ) => {

				var a = new Vector2( 0, 0 );
				var width = 100;
				var height = 200;

				assert.ok( a.width = width, "Set width" );
				assert.ok( a.height = height, "Set height" );

				a.set( width, height );
				assert.strictEqual( a.width, width, "Get width" );
				assert.strictEqual( a.height, height, "Get height" );

			} );

			QUnit.test( "width", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "height", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isVector2", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Vector2();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );

				a.set( x, y );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );

			} );

			QUnit.test( "setScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setX", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setComponent", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getComponent", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2().copy( a );
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );

				// ensure that it is a true copy
				a.x = 0;
				a.y = - 1;
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );

			} );

			QUnit.test( "add", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( - x, - y );

				a.add( b );
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );

				var c = new Vector2().addVectors( b, b );
				assert.ok( c.x == - 2 * x, "Passed!" );
				assert.ok( c.y == - 2 * y, "Passed!" );

			} );

			QUnit.test( "addScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addScaledVector", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( 2, 3 );
				var s = 3;

				a.addScaledVector( b, s );
				assert.strictEqual( a.x, x + b.x * s, "Check x" );
				assert.strictEqual( a.y, y + b.y * s, "Check y" );

			} );

			QUnit.test( "sub", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( - x, - y );

				a.sub( b );
				assert.ok( a.x == 2 * x, "Passed!" );
				assert.ok( a.y == 2 * y, "Passed!" );

				var c = new Vector2().subVectors( a, a );
				assert.ok( c.x == 0, "Passed!" );
				assert.ok( c.y == 0, "Passed!" );

			} );

			QUnit.test( "subScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "subVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiply", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiplyScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "divide", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "divideScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "applyMatrix3", ( assert ) => {

				var a = new Vector2( x, y );
				var m = new Matrix3().set( 2, 3, 5, 7, 11, 13, 17, 19, 23 );

				a.applyMatrix3( m );
				assert.strictEqual( a.x, 18, "Check x" );
				assert.strictEqual( a.y, 60, "Check y" );

			} );

			QUnit.test( "min", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "max", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clamp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clampScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clampLength", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "floor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "ceil", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "round", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "roundToZero", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "negate", ( assert ) => {

				var a = new Vector2( x, y );

				a.negate();
				assert.ok( a.x == - x, "Passed!" );
				assert.ok( a.y == - y, "Passed!" );

			} );

			QUnit.test( "dot", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( - x, - y );
				var c = new Vector2();

				var result = a.dot( b );
				assert.ok( result == ( - x * x - y * y ), "Passed!" );

				var result = a.dot( c );
				assert.ok( result == 0, "Passed!" );

			} );

			QUnit.test( "lengthSq", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "length", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "manhattanLength", ( assert ) => {

				var a = new Vector2( x, 0 );
				var b = new Vector2( 0, - y );
				var c = new Vector2();

				assert.strictEqual( a.manhattanLength(), x, "Positive component" );
				assert.strictEqual( b.manhattanLength(), y, "Negative component" );
				assert.strictEqual( c.manhattanLength(), 0, "Empty component" );

				a.set( x, y );
				assert.strictEqual( a.manhattanLength(), Math.abs( x ) + Math.abs( y ), "Two components" );

			} );

			QUnit.test( "normalize", ( assert ) => {

				var a = new Vector2( x, 0 );
				var b = new Vector2( 0, - y );
				var c = new Vector2();

				a.normalize();
				assert.ok( a.length() == 1, "Passed!" );
				assert.ok( a.x == 1, "Passed!" );

				b.normalize();
				assert.ok( b.length() == 1, "Passed!" );
				assert.ok( b.y == - 1, "Passed!" );

			} );

			QUnit.test( "angle", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "distanceTo", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "distanceToSquared", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "manhattanDistanceTo", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setLength", ( assert ) => {

				var a = new Vector2( x, 0 );

				assert.ok( a.length() == x, "Passed!" );
				a.setLength( y );
				assert.ok( a.length() == y, "Passed!" );

				var a = new Vector2( 0, 0 );
				assert.ok( a.length() == 0, "Passed!" );
				a.setLength( y );
				assert.ok( a.length() == 0, "Passed!" );
				a.setLength();
				assert.ok( isNaN( a.length() ), "Passed!" );

			} );

			QUnit.test( "lerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "lerpVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Vector2( x, 0 );
				var b = new Vector2( 0, - y );

				assert.ok( a.x != b.x, "Passed!" );
				assert.ok( a.y != b.y, "Passed!" );

				assert.ok( ! a.equals( b ), "Passed!" );
				assert.ok( ! b.equals( a ), "Passed!" );

				a.copy( b );
				assert.ok( a.x == b.x, "Passed!" );
				assert.ok( a.y == b.y, "Passed!" );

				assert.ok( a.equals( b ), "Passed!" );
				assert.ok( b.equals( a ), "Passed!" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				var a = new Vector2();
				var array = [ 1, 2, 3, 4 ];

				a.fromArray( array );
				assert.strictEqual( a.x, 1, "No offset: check x" );
				assert.strictEqual( a.y, 2, "No offset: check y" );

				a.fromArray( array, 2 );
				assert.strictEqual( a.x, 3, "With offset: check x" );
				assert.strictEqual( a.y, 4, "With offset: check y" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var a = new Vector2( x, y );

				var array = a.toArray();
				assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );

				var array = [];
				a.toArray( array );
				assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );

				var array = [];
				a.toArray( array, 1 );
				assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
				assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
				assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );

			} );

			QUnit.test( "fromBufferAttribute", ( assert ) => {

				var a = new Vector2();
				var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4 ] ), 2 );

				a.fromBufferAttribute( attr, 0 );
				assert.strictEqual( a.x, 1, "Offset 0: check x" );
				assert.strictEqual( a.y, 2, "Offset 0: check y" );

				a.fromBufferAttribute( attr, 1 );
				assert.strictEqual( a.x, 3, "Offset 1: check x" );
				assert.strictEqual( a.y, 4, "Offset 1: check y" );

			} );

			QUnit.test( "rotateAround", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


			// TODO (Itee) refactor/split
			QUnit.test( "setX,setY", ( assert ) => {

				var a = new Vector2();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );

				a.setX( x );
				a.setY( y );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );

			} );
			QUnit.test( "setComponent,getComponent", ( assert ) => {

				var a = new Vector2();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );

				a.setComponent( 0, 1 );
				a.setComponent( 1, 2 );
				assert.ok( a.getComponent( 0 ) == 1, "Passed!" );
				assert.ok( a.getComponent( 1 ) == 2, "Passed!" );

			} );
			QUnit.test( "multiply/divide", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( - x, - y );

				a.multiplyScalar( - 2 );
				assert.ok( a.x == x * - 2, "Passed!" );
				assert.ok( a.y == y * - 2, "Passed!" );

				b.multiplyScalar( - 2 );
				assert.ok( b.x == 2 * x, "Passed!" );
				assert.ok( b.y == 2 * y, "Passed!" );

				a.divideScalar( - 2 );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );

				b.divideScalar( - 2 );
				assert.ok( b.x == - x, "Passed!" );
				assert.ok( b.y == - y, "Passed!" );

			} );
			QUnit.test( "min/max/clamp", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( - x, - y );
				var c = new Vector2();

				c.copy( a ).min( b );
				assert.ok( c.x == - x, "Passed!" );
				assert.ok( c.y == - y, "Passed!" );

				c.copy( a ).max( b );
				assert.ok( c.x == x, "Passed!" );
				assert.ok( c.y == y, "Passed!" );

				c.set( - 2 * x, 2 * y );
				c.clamp( b, a );
				assert.ok( c.x == - x, "Passed!" );
				assert.ok( c.y == y, "Passed!" );

				c.set( - 2 * x, 2 * x );
				c.clampScalar( - x, x );
				assert.equal( c.x, - x, "scalar clamp x" );
				assert.equal( c.y, x, "scalar clamp y" );

			} );
			QUnit.test( "rounding", ( assert ) => {

				assert.deepEqual( new Vector2( - 0.1, 0.1 ).floor(), new Vector2( - 1, 0 ), "floor .1" );
				assert.deepEqual( new Vector2( - 0.5, 0.5 ).floor(), new Vector2( - 1, 0 ), "floor .5" );
				assert.deepEqual( new Vector2( - 0.9, 0.9 ).floor(), new Vector2( - 1, 0 ), "floor .9" );

				assert.deepEqual( new Vector2( - 0.1, 0.1 ).ceil(), new Vector2( 0, 1 ), "ceil .1" );
				assert.deepEqual( new Vector2( - 0.5, 0.5 ).ceil(), new Vector2( 0, 1 ), "ceil .5" );
				assert.deepEqual( new Vector2( - 0.9, 0.9 ).ceil(), new Vector2( 0, 1 ), "ceil .9" );

				assert.deepEqual( new Vector2( - 0.1, 0.1 ).round(), new Vector2( 0, 0 ), "round .1" );
				assert.deepEqual( new Vector2( - 0.5, 0.5 ).round(), new Vector2( 0, 1 ), "round .5" );
				assert.deepEqual( new Vector2( - 0.9, 0.9 ).round(), new Vector2( - 1, 1 ), "round .9" );

				assert.deepEqual( new Vector2( - 0.1, 0.1 ).roundToZero(), new Vector2( 0, 0 ), "roundToZero .1" );
				assert.deepEqual( new Vector2( - 0.5, 0.5 ).roundToZero(), new Vector2( 0, 0 ), "roundToZero .5" );
				assert.deepEqual( new Vector2( - 0.9, 0.9 ).roundToZero(), new Vector2( 0, 0 ), "roundToZero .9" );
				assert.deepEqual( new Vector2( - 1.1, 1.1 ).roundToZero(), new Vector2( - 1, 1 ), "roundToZero 1.1" );
				assert.deepEqual( new Vector2( - 1.5, 1.5 ).roundToZero(), new Vector2( - 1, 1 ), "roundToZero 1.5" );
				assert.deepEqual( new Vector2( - 1.9, 1.9 ).roundToZero(), new Vector2( - 1, 1 ), "roundToZero 1.9" );

			} );
			QUnit.test( "length/lengthSq", ( assert ) => {

				var a = new Vector2( x, 0 );
				var b = new Vector2( 0, - y );
				var c = new Vector2();

				assert.ok( a.length() == x, "Passed!" );
				assert.ok( a.lengthSq() == x * x, "Passed!" );
				assert.ok( b.length() == y, "Passed!" );
				assert.ok( b.lengthSq() == y * y, "Passed!" );
				assert.ok( c.length() == 0, "Passed!" );
				assert.ok( c.lengthSq() == 0, "Passed!" );

				a.set( x, y );
				assert.ok( a.length() == Math.sqrt( x * x + y * y ), "Passed!" );
				assert.ok( a.lengthSq() == ( x * x + y * y ), "Passed!" );

			} );
			QUnit.test( "distanceTo/distanceToSquared", ( assert ) => {

				var a = new Vector2( x, 0 );
				var b = new Vector2( 0, - y );
				var c = new Vector2();

				assert.ok( a.distanceTo( c ) == x, "Passed!" );
				assert.ok( a.distanceToSquared( c ) == x * x, "Passed!" );

				assert.ok( b.distanceTo( c ) == y, "Passed!" );
				assert.ok( b.distanceToSquared( c ) == y * y, "Passed!" );

			} );
			QUnit.test( "lerp/clone", ( assert ) => {

				var a = new Vector2( x, 0 );
				var b = new Vector2( 0, - y );

				assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 0.5 ) ), "Passed!" );
				assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 1 ) ), "Passed!" );

				assert.ok( a.clone().lerp( b, 0 ).equals( a ), "Passed!" );

				assert.ok( a.clone().lerp( b, 0.5 ).x == x * 0.5, "Passed!" );
				assert.ok( a.clone().lerp( b, 0.5 ).y == - y * 0.5, "Passed!" );

				assert.ok( a.clone().lerp( b, 1 ).equals( b ), "Passed!" );

			} );
			QUnit.test( "setComponent/getComponent exceptions", ( assert ) => {

				var a = new Vector2( 0, 0 );

				assert.throws(
					function () {

						a.setComponent( 2, 0 );

					},
					/index is out of range/,
					"setComponent with an out of range index throws Error"
				);
				assert.throws(
					function () {

						a.getComponent( 2 );

					},
					/index is out of range/,
					"getComponent with an out of range index throws Error"
				);

			} );
			QUnit.test( "setScalar/addScalar/subScalar", ( assert ) => {

				var a = new Vector2( 1, 1 );
				var s = 3;

				a.setScalar( s );
				assert.strictEqual( a.x, s, "setScalar: check x" );
				assert.strictEqual( a.y, s, "setScalar: check y" );

				a.addScalar( s );
				assert.strictEqual( a.x, 2 * s, "addScalar: check x" );
				assert.strictEqual( a.y, 2 * s, "addScalar: check y" );

				a.subScalar( 2 * s );
				assert.strictEqual( a.x, 0, "subScalar: check x" );
				assert.strictEqual( a.y, 0, "subScalar: check y" );

			} );
			QUnit.test( "multiply/divide", ( assert ) => {

				var a = new Vector2( x, y );
				var b = new Vector2( 2 * x, 2 * y );
				var c = new Vector2( 4 * x, 4 * y );

				a.multiply( b );
				assert.strictEqual( a.x, x * b.x, "multiply: check x" );
				assert.strictEqual( a.y, y * b.y, "multiply: check y" );

				b.divide( c );
				assert.strictEqual( b.x, 0.5, "divide: check x" );
				assert.strictEqual( b.y, 0.5, "divide: check y" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Vector3', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Vector3();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );

				var a = new Vector3( x, y, z );
				assert.ok( a.x === x, "Passed!" );
				assert.ok( a.y === y, "Passed!" );
				assert.ok( a.z === z, "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isVector3", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Vector3();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );

				a.set( x, y, z );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z == z, "Passed!" );

			} );

			QUnit.test( "setScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setX", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setZ", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setComponent", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getComponent", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3().copy( a );
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );
				assert.ok( b.z == z, "Passed!" );

				// ensure that it is a true copy
				a.x = 0;
				a.y = - 1;
				a.z = - 2;
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );
				assert.ok( b.z == z, "Passed!" );

			} );

			QUnit.test( "add", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( - x, - y, - z );

				a.add( b );
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );

				var c = new Vector3().addVectors( b, b );
				assert.ok( c.x == - 2 * x, "Passed!" );
				assert.ok( c.y == - 2 * y, "Passed!" );
				assert.ok( c.z == - 2 * z, "Passed!" );

			} );

			QUnit.test( "addScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addScaledVector", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( 2, 3, 4 );
				var s = 3;

				a.addScaledVector( b, s );
				assert.strictEqual( a.x, x + b.x * s, "Check x" );
				assert.strictEqual( a.y, y + b.y * s, "Check y" );
				assert.strictEqual( a.z, z + b.z * s, "Check z" );

			} );

			QUnit.test( "sub", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( - x, - y, - z );

				a.sub( b );
				assert.ok( a.x == 2 * x, "Passed!" );
				assert.ok( a.y == 2 * y, "Passed!" );
				assert.ok( a.z == 2 * z, "Passed!" );

				var c = new Vector3().subVectors( a, a );
				assert.ok( c.x == 0, "Passed!" );
				assert.ok( c.y == 0, "Passed!" );
				assert.ok( c.z == 0, "Passed!" );

			} );

			QUnit.test( "subScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "subVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiply", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiplyScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiplyVectors", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( 2, 3, - 5 );

				var c = new Vector3().multiplyVectors( a, b );
				assert.strictEqual( c.x, x * 2, "Check x" );
				assert.strictEqual( c.y, y * 3, "Check y" );
				assert.strictEqual( c.z, z * - 5, "Check z" );

			} );

			QUnit.test( "applyEuler", ( assert ) => {

				var a = new Vector3( x, y, z );
				var euler = new Euler( 90, - 45, 0 );
				var expected = new Vector3( - 2.352970120501014, - 4.7441750936226645, 0.9779234597246458 );

				a.applyEuler( euler );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );

			} );

			QUnit.test( "applyAxisAngle", ( assert ) => {

				var a = new Vector3( x, y, z );
				var axis = new Vector3( 0, 1, 0 );
				var angle = Math.PI / 4.0;
				var expected = new Vector3( 3 * Math.sqrt( 2 ), 3, Math.sqrt( 2 ) );

				a.applyAxisAngle( axis, angle );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );

			} );

			QUnit.test( "applyMatrix3", ( assert ) => {

				var a = new Vector3( x, y, z );
				var m = new Matrix3().set( 2, 3, 5, 7, 11, 13, 17, 19, 23 );

				a.applyMatrix3( m );
				assert.strictEqual( a.x, 33, "Check x" );
				assert.strictEqual( a.y, 99, "Check y" );
				assert.strictEqual( a.z, 183, "Check z" );

			} );

			QUnit.test( "applyMatrix4", ( assert ) => {


				var a = new Vector3( x, y, z );
				var b = new Vector4( x, y, z, 1 );

				var m = new Matrix4().makeRotationX( Math.PI );
				a.applyMatrix4( m );
				b.applyMatrix4( m );
				assert.ok( a.x == b.x / b.w, "Passed!" );
				assert.ok( a.y == b.y / b.w, "Passed!" );
				assert.ok( a.z == b.z / b.w, "Passed!" );

				var m = new Matrix4().makeTranslation( 3, 2, 1 );
				a.applyMatrix4( m );
				b.applyMatrix4( m );
				assert.ok( a.x == b.x / b.w, "Passed!" );
				assert.ok( a.y == b.y / b.w, "Passed!" );
				assert.ok( a.z == b.z / b.w, "Passed!" );

				var m = new Matrix4().set(
					1, 0, 0, 0,
					0, 1, 0, 0,
					0, 0, 1, 0,
					0, 0, 1, 0
				);
				a.applyMatrix4( m );
				b.applyMatrix4( m );
				assert.ok( a.x == b.x / b.w, "Passed!" );
				assert.ok( a.y == b.y / b.w, "Passed!" );
				assert.ok( a.z == b.z / b.w, "Passed!" );

			} );

			QUnit.test( "applyQuaternion", ( assert ) => {

				var a = new Vector3( x, y, z );

				a.applyQuaternion( new Quaternion() );
				assert.strictEqual( a.x, x, "Identity rotation: check x" );
				assert.strictEqual( a.y, y, "Identity rotation: check y" );
				assert.strictEqual( a.z, z, "Identity rotation: check z" );

				a.applyQuaternion( new Quaternion( x, y, z, w ) );
				assert.strictEqual( a.x, 108, "Normal rotation: check x" );
				assert.strictEqual( a.y, 162, "Normal rotation: check y" );
				assert.strictEqual( a.z, 216, "Normal rotation: check z" );

			} );

			QUnit.test( "project", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "unproject", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "transformDirection", ( assert ) => {

				var a = new Vector3( x, y, z );
				var m = new Matrix4();
				var transformed = new Vector3( 0.3713906763541037, 0.5570860145311556, 0.7427813527082074 );

				a.transformDirection( m );
				assert.ok( Math.abs( a.x - transformed.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - transformed.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - transformed.z ) <= eps, "Check z" );

			} );

			QUnit.test( "divide", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "divideScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "min", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "max", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clamp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clampScalar", ( assert ) => {

				var a = new Vector3( - 0.01, 0.5, 1.5 );
				var clamped = new Vector3( 0.1, 0.5, 1.0 );

				a.clampScalar( 0.1, 1.0 );
				assert.ok( Math.abs( a.x - clamped.x ) <= 0.001, "Check x" );
				assert.ok( Math.abs( a.y - clamped.y ) <= 0.001, "Check y" );
				assert.ok( Math.abs( a.z - clamped.z ) <= 0.001, "Check z" );

			} );

			QUnit.test( "clampLength", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "floor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "ceil", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "round", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "roundToZero", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "negate", ( assert ) => {

				var a = new Vector3( x, y, z );

				a.negate();
				assert.ok( a.x == - x, "Passed!" );
				assert.ok( a.y == - y, "Passed!" );
				assert.ok( a.z == - z, "Passed!" );

			} );

			QUnit.test( "dot", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( - x, - y, - z );
				var c = new Vector3();

				var result = a.dot( b );
				assert.ok( result == ( - x * x - y * y - z * z ), "Passed!" );

				var result = a.dot( c );
				assert.ok( result == 0, "Passed!" );

			} );

			QUnit.test( "lengthSq", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "length", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "manhattanLength", ( assert ) => {

				var a = new Vector3( x, 0, 0 );
				var b = new Vector3( 0, - y, 0 );
				var c = new Vector3( 0, 0, z );
				var d = new Vector3();

				assert.ok( a.manhattanLength() == x, "Positive x" );
				assert.ok( b.manhattanLength() == y, "Negative y" );
				assert.ok( c.manhattanLength() == z, "Positive z" );
				assert.ok( d.manhattanLength() == 0, "Empty initialization" );

				a.set( x, y, z );
				assert.ok( a.manhattanLength() == Math.abs( x ) + Math.abs( y ) + Math.abs( z ), "All components" );

			} );

			QUnit.test( "normalize", ( assert ) => {

				var a = new Vector3( x, 0, 0 );
				var b = new Vector3( 0, - y, 0 );
				var c = new Vector3( 0, 0, z );

				a.normalize();
				assert.ok( a.length() == 1, "Passed!" );
				assert.ok( a.x == 1, "Passed!" );

				b.normalize();
				assert.ok( b.length() == 1, "Passed!" );
				assert.ok( b.y == - 1, "Passed!" );

				c.normalize();
				assert.ok( c.length() == 1, "Passed!" );
				assert.ok( c.z == 1, "Passed!" );

			} );

			QUnit.test( "setLength", ( assert ) => {

				var a = new Vector3( x, 0, 0 );

				assert.ok( a.length() == x, "Passed!" );
				a.setLength( y );
				assert.ok( a.length() == y, "Passed!" );

				var a = new Vector3( 0, 0, 0 );
				assert.ok( a.length() == 0, "Passed!" );
				a.setLength( y );
				assert.ok( a.length() == 0, "Passed!" );
				a.setLength();
				assert.ok( isNaN( a.length() ), "Passed!" );

			} );

			QUnit.test( "lerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "lerpVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "cross", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( 2 * x, - y, 0.5 * z );
				var crossed = new Vector3( 18, 12, - 18 );

				a.cross( b );
				assert.ok( Math.abs( a.x - crossed.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - crossed.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - crossed.z ) <= eps, "Check z" );

			} );

			QUnit.test( "crossVectors", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( x, - y, z );
				var c = new Vector3();
				var crossed = new Vector3( 24, 0, - 12 );

				c.crossVectors( a, b );
				assert.ok( Math.abs( c.x - crossed.x ) <= eps, "Check x" );
				assert.ok( Math.abs( c.y - crossed.y ) <= eps, "Check y" );
				assert.ok( Math.abs( c.z - crossed.z ) <= eps, "Check z" );

			} );

			QUnit.test( "projectOnVector", ( assert ) => {

				var a = new Vector3( 1, 0, 0 );
				var b = new Vector3();
				var normal = new Vector3( 10, 0, 0 );

				assert.ok( b.copy( a ).projectOnVector( normal ).equals( new Vector3( 1, 0, 0 ) ), "Passed!" );

				a.set( 0, 1, 0 );
				assert.ok( b.copy( a ).projectOnVector( normal ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				a.set( 0, 0, - 1 );
				assert.ok( b.copy( a ).projectOnVector( normal ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				a.set( - 1, 0, 0 );
				assert.ok( b.copy( a ).projectOnVector( normal ).equals( new Vector3( - 1, 0, 0 ) ), "Passed!" );

			} );

			QUnit.test( "projectOnPlane", ( assert ) => {

				var a = new Vector3( 1, 0, 0 );
				var b = new Vector3();
				var normal = new Vector3( 1, 0, 0 );

				assert.ok( b.copy( a ).projectOnPlane( normal ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

				a.set( 0, 1, 0 );
				assert.ok( b.copy( a ).projectOnPlane( normal ).equals( new Vector3( 0, 1, 0 ) ), "Passed!" );

				a.set( 0, 0, - 1 );
				assert.ok( b.copy( a ).projectOnPlane( normal ).equals( new Vector3( 0, 0, - 1 ) ), "Passed!" );

				a.set( - 1, 0, 0 );
				assert.ok( b.copy( a ).projectOnPlane( normal ).equals( new Vector3( 0, 0, 0 ) ), "Passed!" );

			} );

			QUnit.test( "reflect", ( assert ) => {

				var a = new Vector3();
				var normal = new Vector3( 0, 1, 0 );
				var b = new Vector3();

				a.set( 0, - 1, 0 );
				assert.ok( b.copy( a ).reflect( normal ).equals( new Vector3( 0, 1, 0 ) ), "Passed!" );

				a.set( 1, - 1, 0 );
				assert.ok( b.copy( a ).reflect( normal ).equals( new Vector3( 1, 1, 0 ) ), "Passed!" );

				a.set( 1, - 1, 0 );
				normal.set( 0, - 1, 0 );
				assert.ok( b.copy( a ).reflect( normal ).equals( new Vector3( 1, 1, 0 ) ), "Passed!" );

			} );

			QUnit.test( "angleTo", ( assert ) => {

				var a = new Vector3( 0, - 0.18851655680720186, 0.9820700116639124 );
				var b = new Vector3( 0, 0.18851655680720186, - 0.9820700116639124 );

				assert.equal( a.angleTo( a ), 0 );
				assert.equal( a.angleTo( b ), Math.PI );

				var x$$1 = new Vector3( 1, 0, 0 );
				var y$$1 = new Vector3( 0, 1, 0 );
				var z$$1 = new Vector3( 0, 0, 1 );

				assert.equal( x$$1.angleTo( y$$1 ), Math.PI / 2 );
				assert.equal( x$$1.angleTo( z$$1 ), Math.PI / 2 );
				assert.equal( z$$1.angleTo( x$$1 ), Math.PI / 2 );

				assert.ok( Math.abs( x$$1.angleTo( new Vector3( 1, 1, 0 ) ) - ( Math.PI / 4 ) ) < 0.0000001 );

			} );

			QUnit.test( "distanceTo", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "distanceToSquared", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "manhattanDistanceTo", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setFromSpherical", ( assert ) => {

				var a = new Vector3();
				var phi = Math.acos( - 0.5 );
				var theta = Math.sqrt( Math.PI ) * phi;
				var sph = new Spherical( 10, phi, theta );
				var expected = new Vector3( - 4.677914006701843, - 5, - 7.288149322420796 );

				a.setFromSpherical( sph );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );

			} );

			QUnit.test( "setFromCylindrical", ( assert ) => {

				var a = new Vector3();
				var cyl = new Cylindrical( 10, Math.PI * 0.125, 20 );
				var expected = new Vector3( 3.826834323650898, 20, 9.238795325112868 );

				a.setFromCylindrical( cyl );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );

			} );

			QUnit.test( "setFromMatrixPosition", ( assert ) => {

				var a = new Vector3();
				var m = new Matrix4().set( 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 );

				a.setFromMatrixPosition( m );
				assert.strictEqual( a.x, 7, "Check x" );
				assert.strictEqual( a.y, 19, "Check y" );
				assert.strictEqual( a.z, 37, "Check z" );

			} );

			QUnit.test( "setFromMatrixScale", ( assert ) => {

				var a = new Vector3();
				var m = new Matrix4().set( 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 );
				var expected = new Vector3( 25.573423705088842, 31.921779399024736, 35.70714214271425 );

				a.setFromMatrixScale( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Check z" );

			} );

			QUnit.test( "setFromMatrixColumn", ( assert ) => {

				var a = new Vector3();
				var m = new Matrix4().set( 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 );

				a.setFromMatrixColumn( m, 0 );
				assert.strictEqual( a.x, 2, "Index 0: check x" );
				assert.strictEqual( a.y, 11, "Index 0: check y" );
				assert.strictEqual( a.z, 23, "Index 0: check z" );

				a.setFromMatrixColumn( m, 2 );
				assert.strictEqual( a.x, 5, "Index 2: check x" );
				assert.strictEqual( a.y, 17, "Index 2: check y" );
				assert.strictEqual( a.z, 31, "Index 2: check z" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Vector3( x, 0, z );
				var b = new Vector3( 0, - y, 0 );

				assert.ok( a.x != b.x, "Passed!" );
				assert.ok( a.y != b.y, "Passed!" );
				assert.ok( a.z != b.z, "Passed!" );

				assert.ok( ! a.equals( b ), "Passed!" );
				assert.ok( ! b.equals( a ), "Passed!" );

				a.copy( b );
				assert.ok( a.x == b.x, "Passed!" );
				assert.ok( a.y == b.y, "Passed!" );
				assert.ok( a.z == b.z, "Passed!" );

				assert.ok( a.equals( b ), "Passed!" );
				assert.ok( b.equals( a ), "Passed!" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				var a = new Vector3();
				var array = [ 1, 2, 3, 4, 5, 6 ];

				a.fromArray( array );
				assert.strictEqual( a.x, 1, "No offset: check x" );
				assert.strictEqual( a.y, 2, "No offset: check y" );
				assert.strictEqual( a.z, 3, "No offset: check z" );

				a.fromArray( array, 3 );
				assert.strictEqual( a.x, 4, "With offset: check x" );
				assert.strictEqual( a.y, 5, "With offset: check y" );
				assert.strictEqual( a.z, 6, "With offset: check z" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var a = new Vector3( x, y, z );

				var array = a.toArray();
				assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "No array, no offset: check z" );

				var array = [];
				a.toArray( array );
				assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "With array, no offset: check z" );

				var array = [];
				a.toArray( array, 1 );
				assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
				assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
				assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );
				assert.strictEqual( array[ 3 ], z, "With array and offset: check z" );

			} );

			QUnit.test( "fromBufferAttribute", ( assert ) => {

				var a = new Vector3();
				var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6 ] ), 3 );

				a.fromBufferAttribute( attr, 0 );
				assert.strictEqual( a.x, 1, "Offset 0: check x" );
				assert.strictEqual( a.y, 2, "Offset 0: check y" );
				assert.strictEqual( a.z, 3, "Offset 0: check z" );

				a.fromBufferAttribute( attr, 1 );
				assert.strictEqual( a.x, 4, "Offset 1: check x" );
				assert.strictEqual( a.y, 5, "Offset 1: check y" );
				assert.strictEqual( a.z, 6, "Offset 1: check z" );

			} );

			// TODO (Itee) refactor/split
			QUnit.test( "setX,setY,setZ", ( assert ) => {

				var a = new Vector3();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );

				a.setX( x );
				a.setY( y );
				a.setZ( z );

				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z == z, "Passed!" );

			} );
			QUnit.test( "setComponent,getComponent", ( assert ) => {

				var a = new Vector3();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );

				a.setComponent( 0, 1 );
				a.setComponent( 1, 2 );
				a.setComponent( 2, 3 );
				assert.ok( a.getComponent( 0 ) == 1, "Passed!" );
				assert.ok( a.getComponent( 1 ) == 2, "Passed!" );
				assert.ok( a.getComponent( 2 ) == 3, "Passed!" );

			} );
			QUnit.test( "setComponent/getComponent exceptions", ( assert ) => {

				var a = new Vector3();

				assert.throws(
					function () {

						a.setComponent( 3, 0 );

					},
					/index is out of range/,
					"setComponent with an out of range index throws Error"
				);
				assert.throws(
					function () {

						a.getComponent( 3 );

					},
					/index is out of range/,
					"getComponent with an out of range index throws Error"
				);

			} );
			QUnit.test( "min/max/clamp", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( - x, - y, - z );
				var c = new Vector3();

				c.copy( a ).min( b );
				assert.ok( c.x == - x, "Passed!" );
				assert.ok( c.y == - y, "Passed!" );
				assert.ok( c.z == - z, "Passed!" );

				c.copy( a ).max( b );
				assert.ok( c.x == x, "Passed!" );
				assert.ok( c.y == y, "Passed!" );
				assert.ok( c.z == z, "Passed!" );

				c.set( - 2 * x, 2 * y, - 2 * z );
				c.clamp( b, a );
				assert.ok( c.x == - x, "Passed!" );
				assert.ok( c.y == y, "Passed!" );
				assert.ok( c.z == - z, "Passed!" );

			} );
			QUnit.test( "distanceTo/distanceToSquared", ( assert ) => {

				var a = new Vector3( x, 0, 0 );
				var b = new Vector3( 0, - y, 0 );
				var c = new Vector3( 0, 0, z );
				var d = new Vector3();

				assert.ok( a.distanceTo( d ) == x, "Passed!" );
				assert.ok( a.distanceToSquared( d ) == x * x, "Passed!" );

				assert.ok( b.distanceTo( d ) == y, "Passed!" );
				assert.ok( b.distanceToSquared( d ) == y * y, "Passed!" );

				assert.ok( c.distanceTo( d ) == z, "Passed!" );
				assert.ok( c.distanceToSquared( d ) == z * z, "Passed!" );

			} );
			QUnit.test( "setScalar/addScalar/subScalar", ( assert ) => {

				var a = new Vector3();
				var s = 3;

				a.setScalar( s );
				assert.strictEqual( a.x, s, "setScalar: check x" );
				assert.strictEqual( a.y, s, "setScalar: check y" );
				assert.strictEqual( a.z, s, "setScalar: check z" );

				a.addScalar( s );
				assert.strictEqual( a.x, 2 * s, "addScalar: check x" );
				assert.strictEqual( a.y, 2 * s, "addScalar: check y" );
				assert.strictEqual( a.z, 2 * s, "addScalar: check z" );

				a.subScalar( 2 * s );
				assert.strictEqual( a.x, 0, "subScalar: check x" );
				assert.strictEqual( a.y, 0, "subScalar: check y" );
				assert.strictEqual( a.z, 0, "subScalar: check z" );

			} );
			QUnit.test( "multiply/divide", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( 2 * x, 2 * y, 2 * z );
				var c = new Vector3( 4 * x, 4 * y, 4 * z );

				a.multiply( b );
				assert.strictEqual( a.x, x * b.x, "multiply: check x" );
				assert.strictEqual( a.y, y * b.y, "multiply: check y" );
				assert.strictEqual( a.z, z * b.z, "multiply: check z" );

				b.divide( c );
				assert.ok( Math.abs( b.x - 0.5 ) <= eps, "divide: check z" );
				assert.ok( Math.abs( b.y - 0.5 ) <= eps, "divide: check z" );
				assert.ok( Math.abs( b.z - 0.5 ) <= eps, "divide: check z" );

			} );
			QUnit.test( "multiply/divide", ( assert ) => {

				var a = new Vector3( x, y, z );
				var b = new Vector3( - x, - y, - z );

				a.multiplyScalar( - 2 );
				assert.ok( a.x == x * - 2, "Passed!" );
				assert.ok( a.y == y * - 2, "Passed!" );
				assert.ok( a.z == z * - 2, "Passed!" );

				b.multiplyScalar( - 2 );
				assert.ok( b.x == 2 * x, "Passed!" );
				assert.ok( b.y == 2 * y, "Passed!" );
				assert.ok( b.z == 2 * z, "Passed!" );

				a.divideScalar( - 2 );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z == z, "Passed!" );

				b.divideScalar( - 2 );
				assert.ok( b.x == - x, "Passed!" );
				assert.ok( b.y == - y, "Passed!" );
				assert.ok( b.z == - z, "Passed!" );

			} );
			QUnit.test( "project/unproject", ( assert ) => {

				var a = new Vector3( x, y, z );
				var camera = new PerspectiveCamera( 75, 16 / 9, 0.1, 300.0 );
				var projected = new Vector3( - 0.36653213611158914, - 0.9774190296309043, 1.0506835611870624 );

				a.project( camera );
				assert.ok( Math.abs( a.x - projected.x ) <= eps, "project: check x" );
				assert.ok( Math.abs( a.y - projected.y ) <= eps, "project: check y" );
				assert.ok( Math.abs( a.z - projected.z ) <= eps, "project: check z" );

				a.unproject( camera );
				assert.ok( Math.abs( a.x - x ) <= eps, "unproject: check x" );
				assert.ok( Math.abs( a.y - y ) <= eps, "unproject: check y" );
				assert.ok( Math.abs( a.z - z ) <= eps, "unproject: check z" );

			} );
			QUnit.test( "length/lengthSq", ( assert ) => {

				var a = new Vector3( x, 0, 0 );
				var b = new Vector3( 0, - y, 0 );
				var c = new Vector3( 0, 0, z );
				var d = new Vector3();

				assert.ok( a.length() == x, "Passed!" );
				assert.ok( a.lengthSq() == x * x, "Passed!" );
				assert.ok( b.length() == y, "Passed!" );
				assert.ok( b.lengthSq() == y * y, "Passed!" );
				assert.ok( c.length() == z, "Passed!" );
				assert.ok( c.lengthSq() == z * z, "Passed!" );
				assert.ok( d.length() == 0, "Passed!" );
				assert.ok( d.lengthSq() == 0, "Passed!" );

				a.set( x, y, z );
				assert.ok( a.length() == Math.sqrt( x * x + y * y + z * z ), "Passed!" );
				assert.ok( a.lengthSq() == ( x * x + y * y + z * z ), "Passed!" );

			} );
			QUnit.test( "lerp/clone", ( assert ) => {

				var a = new Vector3( x, 0, z );
				var b = new Vector3( 0, - y, 0 );

				assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 0.5 ) ), "Passed!" );
				assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 1 ) ), "Passed!" );

				assert.ok( a.clone().lerp( b, 0 ).equals( a ), "Passed!" );

				assert.ok( a.clone().lerp( b, 0.5 ).x == x * 0.5, "Passed!" );
				assert.ok( a.clone().lerp( b, 0.5 ).y == - y * 0.5, "Passed!" );
				assert.ok( a.clone().lerp( b, 0.5 ).z == z * 0.5, "Passed!" );

				assert.ok( a.clone().lerp( b, 1 ).equals( b ), "Passed!" );

			} );

		} );

	} );

	/**
	 * @author bhouston / http://exocortex.com
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module.todo( 'Vector4', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				var a = new Vector4();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 1, "Passed!" );

				var a = new Vector4( x, y, z, w );
				assert.ok( a.x === x, "Passed!" );
				assert.ok( a.y === y, "Passed!" );
				assert.ok( a.z === z, "Passed!" );
				assert.ok( a.w === w, "Passed!" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isVector4", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "set", ( assert ) => {

				var a = new Vector4();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 1, "Passed!" );

				a.set( x, y, z, w );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z == z, "Passed!" );
				assert.ok( a.w == w, "Passed!" );

			} );

			QUnit.test( "setScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setX", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setY", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setZ", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setW", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setComponent", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "getComponent", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4().copy( a );
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );
				assert.ok( b.z == z, "Passed!" );
				assert.ok( b.w == w, "Passed!" );

				// ensure that it is a true copy
				a.x = 0;
				a.y = - 1;
				a.z = - 2;
				a.w = - 3;
				assert.ok( b.x == x, "Passed!" );
				assert.ok( b.y == y, "Passed!" );
				assert.ok( b.z == z, "Passed!" );
				assert.ok( b.w == w, "Passed!" );

			} );

			QUnit.test( "add", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4( - x, - y, - z, - w );

				a.add( b );
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 0, "Passed!" );

				var c = new Vector4().addVectors( b, b );
				assert.ok( c.x == - 2 * x, "Passed!" );
				assert.ok( c.y == - 2 * y, "Passed!" );
				assert.ok( c.z == - 2 * z, "Passed!" );
				assert.ok( c.w == - 2 * w, "Passed!" );

			} );

			QUnit.test( "addScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "addScaledVector", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4( 6, 7, 8, 9 );
				var s = 3;

				a.addScaledVector( b, s );
				assert.strictEqual( a.x, x + b.x * s, "Check x" );
				assert.strictEqual( a.y, y + b.y * s, "Check y" );
				assert.strictEqual( a.z, z + b.z * s, "Check z" );
				assert.strictEqual( a.w, w + b.w * s, "Check w" );

			} );

			QUnit.test( "sub", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4( - x, - y, - z, - w );

				a.sub( b );
				assert.ok( a.x == 2 * x, "Passed!" );
				assert.ok( a.y == 2 * y, "Passed!" );
				assert.ok( a.z == 2 * z, "Passed!" );
				assert.ok( a.w == 2 * w, "Passed!" );

				var c = new Vector4().subVectors( a, a );
				assert.ok( c.x == 0, "Passed!" );
				assert.ok( c.y == 0, "Passed!" );
				assert.ok( c.z == 0, "Passed!" );
				assert.ok( c.w == 0, "Passed!" );

			} );

			QUnit.test( "subScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "subVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "multiplyScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "applyMatrix4", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var m = new Matrix4().makeRotationX( Math.PI );
				var expected = new Vector4( 2, - 3, - 4, 5 );

				a.applyMatrix4( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Rotation matrix: check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Rotation matrix: check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Rotation matrix: check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "Rotation matrix: check w" );

				a.set( x, y, z, w );
				m.makeTranslation( 5, 7, 11 );
				expected.set( 27, 38, 59, 5 );

				a.applyMatrix4( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Translation matrix: check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Translation matrix: check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Translation matrix: check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "Translation matrix: check w" );

				a.set( x, y, z, w );
				m.set( 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0 );
				expected.set( 2, 3, 4, 4 );

				a.applyMatrix4( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Custom matrix: check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Custom matrix: check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Custom matrix: check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "Custom matrix: check w" );

				a.set( x, y, z, w );
				m.set( 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 );
				expected.set( 68, 224, 442, 664 );

				a.applyMatrix4( m );
				assert.ok( Math.abs( a.x - expected.x ) <= eps, "Bogus matrix: check x" );
				assert.ok( Math.abs( a.y - expected.y ) <= eps, "Bogus matrix: check y" );
				assert.ok( Math.abs( a.z - expected.z ) <= eps, "Bogus matrix: check z" );
				assert.ok( Math.abs( a.w - expected.w ) <= eps, "Bogus matrix: check w" );

			} );

			QUnit.test( "divideScalar", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setAxisAngleFromQuaternion", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setAxisAngleFromRotationMatrix", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "min", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "max", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clamp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clampScalar", ( assert ) => {

				var a = new Vector4( - 0.1, 0.01, 0.5, 1.5 );
				var clamped = new Vector4( 0.1, 0.1, 0.5, 1.0 );

				a.clampScalar( 0.1, 1.0 );
				assert.ok( Math.abs( a.x - clamped.x ) <= eps, "Check x" );
				assert.ok( Math.abs( a.y - clamped.y ) <= eps, "Check y" );
				assert.ok( Math.abs( a.z - clamped.z ) <= eps, "Check z" );
				assert.ok( Math.abs( a.w - clamped.w ) <= eps, "Check w" );

			} );

			QUnit.test( "clampLength", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "floor", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "ceil", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "round", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "roundToZero", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "negate", ( assert ) => {

				var a = new Vector4( x, y, z, w );

				a.negate();
				assert.ok( a.x == - x, "Passed!" );
				assert.ok( a.y == - y, "Passed!" );
				assert.ok( a.z == - z, "Passed!" );
				assert.ok( a.w == - w, "Passed!" );

			} );

			QUnit.test( "dot", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4( - x, - y, - z, - w );
				var c = new Vector4( 0, 0, 0, 0 );

				var result = a.dot( b );
				assert.ok( result == ( - x * x - y * y - z * z - w * w ), "Passed!" );

				var result = a.dot( c );
				assert.ok( result == 0, "Passed!" );

			} );

			QUnit.test( "lengthSq", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "length", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "manhattanLength", ( assert ) => {

				var a = new Vector4( x, 0, 0, 0 );
				var b = new Vector4( 0, - y, 0, 0 );
				var c = new Vector4( 0, 0, z, 0 );
				var d = new Vector4( 0, 0, 0, w );
				var e = new Vector4( 0, 0, 0, 0 );

				assert.ok( a.manhattanLength() == x, "Positive x" );
				assert.ok( b.manhattanLength() == y, "Negative y" );
				assert.ok( c.manhattanLength() == z, "Positive z" );
				assert.ok( d.manhattanLength() == w, "Positive w" );
				assert.ok( e.manhattanLength() == 0, "Empty initialization" );

				a.set( x, y, z, w );
				assert.ok(
					a.manhattanLength() == Math.abs( x ) + Math.abs( y ) + Math.abs( z ) + Math.abs( w ),
					"All components"
				);

			} );

			QUnit.test( "normalize", ( assert ) => {

				var a = new Vector4( x, 0, 0, 0 );
				var b = new Vector4( 0, - y, 0, 0 );
				var c = new Vector4( 0, 0, z, 0 );
				var d = new Vector4( 0, 0, 0, - w );

				a.normalize();
				assert.ok( a.length() == 1, "Passed!" );
				assert.ok( a.x == 1, "Passed!" );

				b.normalize();
				assert.ok( b.length() == 1, "Passed!" );
				assert.ok( b.y == - 1, "Passed!" );

				c.normalize();
				assert.ok( c.length() == 1, "Passed!" );
				assert.ok( c.z == 1, "Passed!" );

				d.normalize();
				assert.ok( d.length() == 1, "Passed!" );
				assert.ok( d.w == - 1, "Passed!" );

			} );

			QUnit.test( "setLength", ( assert ) => {

				var a = new Vector4( x, 0, 0, 0 );

				assert.ok( a.length() == x, "Passed!" );
				a.setLength( y );
				assert.ok( a.length() == y, "Passed!" );

				var a = new Vector4( 0, 0, 0, 0 );
				assert.ok( a.length() == 0, "Passed!" );
				a.setLength( y );
				assert.ok( a.length() == 0, "Passed!" );
				a.setLength();
				assert.ok( isNaN( a.length() ), "Passed!" );

			} );

			QUnit.test( "lerp", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "lerpVectors", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "equals", ( assert ) => {

				var a = new Vector4( x, 0, z, 0 );
				var b = new Vector4( 0, - y, 0, - w );

				assert.ok( a.x != b.x, "Passed!" );
				assert.ok( a.y != b.y, "Passed!" );
				assert.ok( a.z != b.z, "Passed!" );
				assert.ok( a.w != b.w, "Passed!" );

				assert.ok( ! a.equals( b ), "Passed!" );
				assert.ok( ! b.equals( a ), "Passed!" );

				a.copy( b );
				assert.ok( a.x == b.x, "Passed!" );
				assert.ok( a.y == b.y, "Passed!" );
				assert.ok( a.z == b.z, "Passed!" );
				assert.ok( a.w == b.w, "Passed!" );

				assert.ok( a.equals( b ), "Passed!" );
				assert.ok( b.equals( a ), "Passed!" );

			} );

			QUnit.test( "fromArray", ( assert ) => {

				var a = new Vector4();
				var array = [ 1, 2, 3, 4, 5, 6, 7, 8 ];

				a.fromArray( array );
				assert.strictEqual( a.x, 1, "No offset: check x" );
				assert.strictEqual( a.y, 2, "No offset: check y" );
				assert.strictEqual( a.z, 3, "No offset: check z" );
				assert.strictEqual( a.w, 4, "No offset: check w" );

				a.fromArray( array, 4 );
				assert.strictEqual( a.x, 5, "With offset: check x" );
				assert.strictEqual( a.y, 6, "With offset: check y" );
				assert.strictEqual( a.z, 7, "With offset: check z" );
				assert.strictEqual( a.w, 8, "With offset: check w" );

			} );

			QUnit.test( "toArray", ( assert ) => {

				var a = new Vector4( x, y, z, w );

				var array = a.toArray();
				assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "No array, no offset: check z" );
				assert.strictEqual( array[ 3 ], w, "No array, no offset: check w" );

				var array = [];
				a.toArray( array );
				assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
				assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );
				assert.strictEqual( array[ 2 ], z, "With array, no offset: check z" );
				assert.strictEqual( array[ 3 ], w, "With array, no offset: check w" );

				var array = [];
				a.toArray( array, 1 );
				assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
				assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
				assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );
				assert.strictEqual( array[ 3 ], z, "With array and offset: check z" );
				assert.strictEqual( array[ 4 ], w, "With array and offset: check w" );

			} );

			QUnit.test( "fromBufferAttribute", ( assert ) => {

				var a = new Vector4();
				var attr = new BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6, 7, 8 ] ), 4 );

				a.fromBufferAttribute( attr, 0 );
				assert.strictEqual( a.x, 1, "Offset 0: check x" );
				assert.strictEqual( a.y, 2, "Offset 0: check y" );
				assert.strictEqual( a.z, 3, "Offset 0: check z" );
				assert.strictEqual( a.w, 4, "Offset 0: check w" );

				a.fromBufferAttribute( attr, 1 );
				assert.strictEqual( a.x, 5, "Offset 1: check x" );
				assert.strictEqual( a.y, 6, "Offset 1: check y" );
				assert.strictEqual( a.z, 7, "Offset 1: check z" );
				assert.strictEqual( a.w, 8, "Offset 1: check w" );

			} );

			// TODO (Itee) refactor/split
			QUnit.test( "setX,setY,setZ,setW", ( assert ) => {

				var a = new Vector4();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 1, "Passed!" );

				a.setX( x );
				a.setY( y );
				a.setZ( z );
				a.setW( w );

				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z == z, "Passed!" );
				assert.ok( a.w == w, "Passed!" );

			} );
			QUnit.test( "setComponent,getComponent", ( assert ) => {

				var a = new Vector4();
				assert.ok( a.x == 0, "Passed!" );
				assert.ok( a.y == 0, "Passed!" );
				assert.ok( a.z == 0, "Passed!" );
				assert.ok( a.w == 1, "Passed!" );

				a.setComponent( 0, 1 );
				a.setComponent( 1, 2 );
				a.setComponent( 2, 3 );
				a.setComponent( 3, 4 );
				assert.ok( a.getComponent( 0 ) == 1, "Passed!" );
				assert.ok( a.getComponent( 1 ) == 2, "Passed!" );
				assert.ok( a.getComponent( 2 ) == 3, "Passed!" );
				assert.ok( a.getComponent( 3 ) == 4, "Passed!" );

			} );
			QUnit.test( "setComponent/getComponent exceptions", ( assert ) => {

				var a = new Vector4();

				assert.throws(
					function () {

						a.setComponent( 4, 0 );

					},
					/index is out of range/,
					"setComponent with an out of range index throws Error"
				);
				assert.throws(
					function () {

						a.getComponent( 4 );

					},
					/index is out of range/,
					"getComponent with an out of range index throws Error"
				);

			} );
			QUnit.test( "setScalar/addScalar/subScalar", ( assert ) => {

				var a = new Vector4();
				var s = 3;

				a.setScalar( s );
				assert.strictEqual( a.x, s, "setScalar: check x" );
				assert.strictEqual( a.y, s, "setScalar: check y" );
				assert.strictEqual( a.z, s, "setScalar: check z" );
				assert.strictEqual( a.w, s, "setScalar: check w" );

				a.addScalar( s );
				assert.strictEqual( a.x, 2 * s, "addScalar: check x" );
				assert.strictEqual( a.y, 2 * s, "addScalar: check y" );
				assert.strictEqual( a.z, 2 * s, "addScalar: check z" );
				assert.strictEqual( a.w, 2 * s, "addScalar: check w" );

				a.subScalar( 2 * s );
				assert.strictEqual( a.x, 0, "subScalar: check x" );
				assert.strictEqual( a.y, 0, "subScalar: check y" );
				assert.strictEqual( a.z, 0, "subScalar: check z" );
				assert.strictEqual( a.w, 0, "subScalar: check w" );

			} );
			QUnit.test( "multiply/divide", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4( - x, - y, - z, - w );

				a.multiplyScalar( - 2 );
				assert.ok( a.x == x * - 2, "Passed!" );
				assert.ok( a.y == y * - 2, "Passed!" );
				assert.ok( a.z == z * - 2, "Passed!" );
				assert.ok( a.w == w * - 2, "Passed!" );

				b.multiplyScalar( - 2 );
				assert.ok( b.x == 2 * x, "Passed!" );
				assert.ok( b.y == 2 * y, "Passed!" );
				assert.ok( b.z == 2 * z, "Passed!" );
				assert.ok( b.w == 2 * w, "Passed!" );

				a.divideScalar( - 2 );
				assert.ok( a.x == x, "Passed!" );
				assert.ok( a.y == y, "Passed!" );
				assert.ok( a.z == z, "Passed!" );
				assert.ok( a.w == w, "Passed!" );

				b.divideScalar( - 2 );
				assert.ok( b.x == - x, "Passed!" );
				assert.ok( b.y == - y, "Passed!" );
				assert.ok( b.z == - z, "Passed!" );
				assert.ok( b.w == - w, "Passed!" );

			} );
			QUnit.test( "min/max/clamp", ( assert ) => {

				var a = new Vector4( x, y, z, w );
				var b = new Vector4( - x, - y, - z, - w );
				var c = new Vector4();

				c.copy( a ).min( b );
				assert.ok( c.x == - x, "Passed!" );
				assert.ok( c.y == - y, "Passed!" );
				assert.ok( c.z == - z, "Passed!" );
				assert.ok( c.w == - w, "Passed!" );

				c.copy( a ).max( b );
				assert.ok( c.x == x, "Passed!" );
				assert.ok( c.y == y, "Passed!" );
				assert.ok( c.z == z, "Passed!" );
				assert.ok( c.w == w, "Passed!" );

				c.set( - 2 * x, 2 * y, - 2 * z, 2 * w );
				c.clamp( b, a );
				assert.ok( c.x == - x, "Passed!" );
				assert.ok( c.y == y, "Passed!" );
				assert.ok( c.z == - z, "Passed!" );
				assert.ok( c.w == w, "Passed!" );

			} );
			QUnit.test( "length/lengthSq", ( assert ) => {

				var a = new Vector4( x, 0, 0, 0 );
				var b = new Vector4( 0, - y, 0, 0 );
				var c = new Vector4( 0, 0, z, 0 );
				var d = new Vector4( 0, 0, 0, w );
				var e = new Vector4( 0, 0, 0, 0 );

				assert.ok( a.length() == x, "Passed!" );
				assert.ok( a.lengthSq() == x * x, "Passed!" );
				assert.ok( b.length() == y, "Passed!" );
				assert.ok( b.lengthSq() == y * y, "Passed!" );
				assert.ok( c.length() == z, "Passed!" );
				assert.ok( c.lengthSq() == z * z, "Passed!" );
				assert.ok( d.length() == w, "Passed!" );
				assert.ok( d.lengthSq() == w * w, "Passed!" );
				assert.ok( e.length() == 0, "Passed!" );
				assert.ok( e.lengthSq() == 0, "Passed!" );

				a.set( x, y, z, w );
				assert.ok( a.length() == Math.sqrt( x * x + y * y + z * z + w * w ), "Passed!" );
				assert.ok( a.lengthSq() == ( x * x + y * y + z * z + w * w ), "Passed!" );

			} );
			QUnit.test( "lerp/clone", ( assert ) => {

				var a = new Vector4( x, 0, z, 0 );
				var b = new Vector4( 0, - y, 0, - w );

				assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 0.5 ) ), "Passed!" );
				assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 1 ) ), "Passed!" );

				assert.ok( a.clone().lerp( b, 0 ).equals( a ), "Passed!" );

				assert.ok( a.clone().lerp( b, 0.5 ).x == x * 0.5, "Passed!" );
				assert.ok( a.clone().lerp( b, 0.5 ).y == - y * 0.5, "Passed!" );
				assert.ok( a.clone().lerp( b, 0.5 ).z == z * 0.5, "Passed!" );
				assert.ok( a.clone().lerp( b, 0.5 ).w == - w * 0.5, "Passed!" );

				assert.ok( a.clone().lerp( b, 1 ).equals( b ), "Passed!" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module( 'Interpolants', () => {

			QUnit.module.todo( 'CubicInterpolant', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PRIVATE STUFF
				QUnit.test( "DefaultSettings_", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "intervalChanged_", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "interpolate_", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module( 'Interpolants', () => {

			QUnit.module.todo( 'DiscreteInterpolant', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PRIVATE STUFF
				QUnit.test( "interpolate_", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module( 'Interpolants', () => {

			QUnit.module.todo( 'LinearInterpolant', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PRIVATE STUFF
				QUnit.test( "interpolate_", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Maths', () => {

		QUnit.module( 'Interpolants', () => {

			QUnit.module.todo( 'QuaternionLinearInterpolant', () => {

				// INHERITANCE
				QUnit.test( "Extending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PRIVATE STUFF
				QUnit.test( "interpolate_", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Bone', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isBone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Group', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mikael emtinger / http://gomo.se/
	 * @author alteredq / http://alteredqualia.com/
	 */

	function LensFlare( texture, size, distance, blending, color ) {

		Object3D.call( this );

		this.lensFlares = [];

		this.positionScreen = new Vector3();
		this.customUpdateCallback = undefined;

		if ( texture !== undefined ) {

			this.add( texture, size, distance, blending, color );

		}

	}

	LensFlare.prototype = Object.assign( Object.create( Object3D.prototype ), {

		constructor: LensFlare,

		isLensFlare: true,

		copy: function ( source ) {

			Object3D.prototype.copy.call( this, source );

			this.positionScreen.copy( source.positionScreen );
			this.customUpdateCallback = source.customUpdateCallback;

			for ( var i = 0, l = source.lensFlares.length; i < l; i ++ ) {

				this.lensFlares.push( source.lensFlares[ i ] );

			}

			return this;

		},

		add: function ( texture, size, distance, blending, color, opacity ) {

			if ( size === undefined ) size = - 1;
			if ( distance === undefined ) distance = 0;
			if ( opacity === undefined ) opacity = 1;
			if ( color === undefined ) color = new Color( 0xffffff );
			if ( blending === undefined ) blending = NormalBlending;

			distance = Math.min( distance, Math.max( 0, distance ) );

			this.lensFlares.push( {
				texture: texture,	// THREE.Texture
				size: size, 		// size in pixels (-1 = use texture.width)
				distance: distance, 	// distance (0-1) from light source (0=at light source)
				x: 0, y: 0, z: 0,	// screen position (-1 => 1) z = 0 is in front z = 1 is back
				scale: 1, 		// scale
				rotation: 0, 		// rotation
				opacity: opacity,	// opacity
				color: color,		// color
				blending: blending	// blending
			} );

		},

		/*
		 * Update lens flares update positions on all flares based on the screen position
		 * Set myLensFlare.customUpdateCallback to alter the flares in your project specific way.
		 */

		updateLensFlares: function () {

			var f, fl = this.lensFlares.length;
			var flare;
			var vecX = - this.positionScreen.x * 2;
			var vecY = - this.positionScreen.y * 2;

			for ( f = 0; f < fl; f ++ ) {

				flare = this.lensFlares[ f ];

				flare.x = this.positionScreen.x + vecX * flare.distance;
				flare.y = this.positionScreen.y + vecY * flare.distance;

				flare.wantedRotation = flare.x * Math.PI * 0.25;
				flare.rotation += ( flare.wantedRotation - flare.rotation ) * 0.25;

			}

		}

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'LensFlare', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLensFlare", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "add", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "updateLensFlares", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Line', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLine", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "raycast", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'LineLoop', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLineLoop", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'LineSegments', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLineSegments", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'LOD', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "levels", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isLOD", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "addLevel", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "getObjectForDistance", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "raycast", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Mesh', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isMesh", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "setDrawMode", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "updateMorphTargets", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "raycast", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Points', () => {

			// INHERITANCE
			QUnit.test( "isPoints", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "raycast", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Skeleton', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "calculateInverses", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "pose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "update", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'SkinnedMesh', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSkinnedMesh", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "initBones", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "bind", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "pose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "normalizeSkinWeights", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "updateMatrixWorld", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );
			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Objects', () => {

		QUnit.module.todo( 'Sprite', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isSprite", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "raycast", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module.todo( 'WebGL2Renderer', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "domElement", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clear", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setPixelRatio", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setSize", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "render", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module.todo( 'WebGLRenderer', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "PrayForUs", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );


		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module.todo( 'WebGLRenderTarget', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isWebGLRenderTarget", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "setSize", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module.todo( 'WebGLRenderTargetCube', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isWebGLRenderTargetCube", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'Shaders', () => {

			QUnit.module.todo( 'ShaderChunk', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'Shaders', () => {

			QUnit.module.todo( 'ShaderLib', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'Shaders', () => {

			QUnit.module.todo( 'UniformsLib', () => {

				// PUBLIC STUFF
				QUnit.test( "merge", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "clone", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'Shaders', () => {

			QUnit.module.todo( 'UniformsUtils', () => {

				QUnit.test( 'write me !', ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLAttributes', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "get", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "remove", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "update", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLBackground', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getClearColor", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setClearColor", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getClearAlpha", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setClearAlpha", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "render", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLBufferRenderer', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "setMode", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "render", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "renderInstances", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLCapabilities', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getMaxAnisotropy", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getMaxPrecision", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "precision", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "logarithmicDepthBuffer", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxTextures", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxVertexTextures", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxTextureSize", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxCubemapSize", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxAttributes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxVertexUniforms", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxVaryings", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "maxFragmentUniforms", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "vertexTextures", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "floatFragmentTextures", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "floatVertexTextures", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLClipping', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "init", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "beginShadows", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "endShadows", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setState", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLExtensions', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "get", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLFlareRenderer', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "render", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLGeometries', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "get", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "update", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getWireframeAttribute", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLIndexedBufferRenderer', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "setMode", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setIndex", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "render", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "renderInstances", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLLights', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "setup", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "state", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLMorphtargets', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "update", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLObjects', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "update", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "clear", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLProgram', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PROPERTIES
				QUnit.test( "uniforms", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "attributes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getUniforms", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getAttributes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "destroy", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLPrograms', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getParameters", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getProgramCode", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "acquireProgram", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "releaseProgram", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "programs", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLProperties', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "get", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "remove", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "clear", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLRenderLists', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "get", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "dispose", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLShader', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLShadowMap', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "render", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLSpriteRenderer', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "render", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLState', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "buffers", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "initAttributes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "enableAttribute", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "enableAttributeAndDivisor", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "disableUnusedAttributes", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "enable", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "disable", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getCompressedTextureFormats", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "useProgram", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setBlending", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setMaterial", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setFlipSided", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setCullFace", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setLineWidth", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setPolygonOffset", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setScissorTest", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "activeTexture", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "bindTexture", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "compressedTexImage2D", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "texImage2D", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "scissor", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "viewport", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "reset", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLTextures', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "setTexture2D", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );
				QUnit.test( "setTextureCube", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );
				QUnit.test( "setTextureCubeDynamic", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );
				QUnit.test( "setupRenderTarget", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );
				QUnit.test( "updateRenderTargetMipmap", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLUniforms', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "setValue", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setOptional", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "upload", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "seqWithValue", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebGLUtils', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "convert", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Renderers', () => {

		QUnit.module( 'WebGL', () => {

			QUnit.module.todo( 'WebVRManager', () => {

				// INSTANCING
				QUnit.test( "Instancing", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				// PUBLIC STUFF
				QUnit.test( "getDevice", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "setDevice", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getCamera", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "getStandingMatrix", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "submitFrame", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

				QUnit.test( "dispose", ( assert ) => {

					assert.ok( false, "everything's gonna be alright" );

				} );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Fog', () => {

		QUnit.module.todo( 'Scene', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isFog", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'FoxExp2', () => {

		QUnit.module.todo( 'Scene', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isFogExp2", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Scenes', () => {

		QUnit.module.todo( 'Scene', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isScene", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'CanvasTexture', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isCanvasTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'CompressedTexture', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isCompressedTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'CubeTexture', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "images", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isCubeTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'DataTexture', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isDataTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author Matt DesLauriers / @mattdesl
	 * @author atix / arthursilber.de
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'DepthTexture', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isDepthTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'Texture', () => {

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PROPERTIES
			QUnit.test( "needsUpdate", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "clone", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "copy", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "toJSON", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "dispose", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			QUnit.test( "transformUv", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author mrdoob / http://mrdoob.com/
	 */

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */
	/* global QUnit */

	QUnit.module( 'Textures', () => {

		QUnit.module.todo( 'VideoTexture', () => {

			// INHERITANCE
			QUnit.test( "Extending", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// INSTANCING
			QUnit.test( "Instancing", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

			// PUBLIC STUFF
			QUnit.test( "isVideoTexture", ( assert ) => {

				assert.ok( false, "everything's gonna be alright" );

			} );

		} );

	} );

	/**
	 * @author TristanVALCKE / https://github.com/Itee
	 */

	//src
	//src/animation
	//src/animation/tracks
	//src/audio
	//src/cameras
	//src/core
	//src/extras
	//src/extras/core
	//src/extras/curves
	//src/extras/objects
	//src/geometries
	//src/helpers
	//src/lights
	//src/loaders
	//src/materials
	//src/math
	//src/math/interpolants
	//src/objects
	//src/renderers
	//src/renderers/shaders
	//src/renderers/webgl
	//src/renderers/webvr
	//src/scenes
	//src/textures

	} );

})));