three.js/examples/js/utils/GeometryCompressionUtils.js

( function () {

	/**
 * Octahedron and Quantization encodings based on work by:
 *
 * @link https://github.com/tsherif/mesh-quantization-example
 *
 */

	class GeometryCompressionUtils {

		/**
		 * Make the input mesh.geometry's normal attribute encoded and compressed by 3 different methods.
		 * Also will change the mesh.material to `PackedPhongMaterial` which let the vertex shader program decode the normal data.
		 *
		 * @param {THREE.Mesh} mesh
		 * @param {String} encodeMethod		"DEFAULT" || "OCT1Byte" || "OCT2Byte" || "ANGLES"
		 *
		 */
		static compressNormals( mesh, encodeMethod ) {

			if ( ! mesh.geometry ) {

				console.error( 'Mesh must contain geometry. ' );

			}

			const normal = mesh.geometry.attributes.normal;

			if ( ! normal ) {

				console.error( 'Geometry must contain normal attribute. ' );

			}

			if ( normal.isPacked ) return;

			if ( normal.itemSize != 3 ) {

				console.error( 'normal.itemSize is not 3, which cannot be encoded. ' );

			}

			const array = normal.array;
			const count = normal.count;
			let result;

			if ( encodeMethod == 'DEFAULT' ) {

				// TODO: Add 1 byte to the result, making the encoded length to be 4 bytes.
				result = new Uint8Array( count * 3 );

				for ( let idx = 0; idx < array.length; idx += 3 ) {

					const encoded = EncodingFuncs.defaultEncode( array[ idx ], array[ idx + 1 ], array[ idx + 2 ], 1 );
					result[ idx + 0 ] = encoded[ 0 ];
					result[ idx + 1 ] = encoded[ 1 ];
					result[ idx + 2 ] = encoded[ 2 ];

				}

				mesh.geometry.setAttribute( 'normal', new THREE.BufferAttribute( result, 3, true ) );
				mesh.geometry.attributes.normal.bytes = result.length * 1;

			} else if ( encodeMethod == 'OCT1Byte' ) {

				/**
			* It is not recommended to use 1-byte octahedron normals encoding unless you want to extremely reduce the memory usage
			* As it makes vertex data not aligned to a 4 byte boundary which may harm some WebGL implementations and sometimes the normal distortion is visible
			* Please refer to @zeux 's comments in https://github.com/mrdoob/three.js/pull/18208
			*/
				result = new Int8Array( count * 2 );

				for ( let idx = 0; idx < array.length; idx += 3 ) {

					const encoded = EncodingFuncs.octEncodeBest( array[ idx ], array[ idx + 1 ], array[ idx + 2 ], 1 );
					result[ idx / 3 * 2 + 0 ] = encoded[ 0 ];
					result[ idx / 3 * 2 + 1 ] = encoded[ 1 ];

				}

				mesh.geometry.setAttribute( 'normal', new THREE.BufferAttribute( result, 2, true ) );
				mesh.geometry.attributes.normal.bytes = result.length * 1;

			} else if ( encodeMethod == 'OCT2Byte' ) {

				result = new Int16Array( count * 2 );

				for ( let idx = 0; idx < array.length; idx += 3 ) {

					const encoded = EncodingFuncs.octEncodeBest( array[ idx ], array[ idx + 1 ], array[ idx + 2 ], 2 );
					result[ idx / 3 * 2 + 0 ] = encoded[ 0 ];
					result[ idx / 3 * 2 + 1 ] = encoded[ 1 ];

				}

				mesh.geometry.setAttribute( 'normal', new THREE.BufferAttribute( result, 2, true ) );
				mesh.geometry.attributes.normal.bytes = result.length * 2;

			} else if ( encodeMethod == 'ANGLES' ) {

				result = new Uint16Array( count * 2 );

				for ( let idx = 0; idx < array.length; idx += 3 ) {

					const encoded = EncodingFuncs.anglesEncode( array[ idx ], array[ idx + 1 ], array[ idx + 2 ] );
					result[ idx / 3 * 2 + 0 ] = encoded[ 0 ];
					result[ idx / 3 * 2 + 1 ] = encoded[ 1 ];

				}

				mesh.geometry.setAttribute( 'normal', new THREE.BufferAttribute( result, 2, true ) );
				mesh.geometry.attributes.normal.bytes = result.length * 2;

			} else {

				console.error( 'Unrecognized encoding method, should be `DEFAULT` or `ANGLES` or `OCT`. ' );

			}

			mesh.geometry.attributes.normal.needsUpdate = true;
			mesh.geometry.attributes.normal.isPacked = true;
			mesh.geometry.attributes.normal.packingMethod = encodeMethod; // modify material

			if ( ! ( mesh.material instanceof PackedPhongMaterial ) ) {

				mesh.material = new PackedPhongMaterial().copy( mesh.material );

			}

			if ( encodeMethod == 'ANGLES' ) {

				mesh.material.defines.USE_PACKED_NORMAL = 0;

			}

			if ( encodeMethod == 'OCT1Byte' ) {

				mesh.material.defines.USE_PACKED_NORMAL = 1;

			}

			if ( encodeMethod == 'OCT2Byte' ) {

				mesh.material.defines.USE_PACKED_NORMAL = 1;

			}

			if ( encodeMethod == 'DEFAULT' ) {

				mesh.material.defines.USE_PACKED_NORMAL = 2;

			}

		}
		/**
		 * Make the input mesh.geometry's position attribute encoded and compressed.
		 * Also will change the mesh.material to `PackedPhongMaterial` which let the vertex shader program decode the position data.
		 *
		 * @param {THREE.Mesh} mesh
		 *
		 */


		static compressPositions( mesh ) {

			if ( ! mesh.geometry ) {

				console.error( 'Mesh must contain geometry. ' );

			}

			const position = mesh.geometry.attributes.position;

			if ( ! position ) {

				console.error( 'Geometry must contain position attribute. ' );

			}

			if ( position.isPacked ) return;

			if ( position.itemSize != 3 ) {

				console.error( 'position.itemSize is not 3, which cannot be packed. ' );

			}

			const array = position.array;
			const encodingBytes = 2;
			const result = EncodingFuncs.quantizedEncode( array, encodingBytes );
			const quantized = result.quantized;
			const decodeMat = result.decodeMat; // IMPORTANT: calculate original geometry bounding info first, before updating packed positions

			if ( mesh.geometry.boundingBox == null ) mesh.geometry.computeBoundingBox();
			if ( mesh.geometry.boundingSphere == null ) mesh.geometry.computeBoundingSphere();
			mesh.geometry.setAttribute( 'position', new THREE.BufferAttribute( quantized, 3 ) );
			mesh.geometry.attributes.position.isPacked = true;
			mesh.geometry.attributes.position.needsUpdate = true;
			mesh.geometry.attributes.position.bytes = quantized.length * encodingBytes; // modify material

			if ( ! ( mesh.material instanceof PackedPhongMaterial ) ) {

				mesh.material = new PackedPhongMaterial().copy( mesh.material );

			}

			mesh.material.defines.USE_PACKED_POSITION = 0;
			mesh.material.uniforms.quantizeMatPos.value = decodeMat;
			mesh.material.uniforms.quantizeMatPos.needsUpdate = true;

		}
		/**
		 * Make the input mesh.geometry's uv attribute encoded and compressed.
		 * Also will change the mesh.material to `PackedPhongMaterial` which let the vertex shader program decode the uv data.
		 *
		 * @param {THREE.Mesh} mesh
		 *
		 */


		static compressUvs( mesh ) {

			if ( ! mesh.geometry ) {

				console.error( 'Mesh must contain geometry property. ' );

			}

			const uvs = mesh.geometry.attributes.uv;

			if ( ! uvs ) {

				console.error( 'Geometry must contain uv attribute. ' );

			}

			if ( uvs.isPacked ) return;
			const range = {
				min: Infinity,
				max: - Infinity
			};
			const array = uvs.array;

			for ( let i = 0; i < array.length; i ++ ) {

				range.min = Math.min( range.min, array[ i ] );
				range.max = Math.max( range.max, array[ i ] );

			}

			let result;

			if ( range.min >= - 1.0 && range.max <= 1.0 ) {

				// use default encoding method
				result = new Uint16Array( array.length );

				for ( let i = 0; i < array.length; i += 2 ) {

					const encoded = EncodingFuncs.defaultEncode( array[ i ], array[ i + 1 ], 0, 2 );
					result[ i ] = encoded[ 0 ];
					result[ i + 1 ] = encoded[ 1 ];

				}

				mesh.geometry.setAttribute( 'uv', new THREE.BufferAttribute( result, 2, true ) );
				mesh.geometry.attributes.uv.isPacked = true;
				mesh.geometry.attributes.uv.needsUpdate = true;
				mesh.geometry.attributes.uv.bytes = result.length * 2;

				if ( ! ( mesh.material instanceof PackedPhongMaterial ) ) {

					mesh.material = new PackedPhongMaterial().copy( mesh.material );

				}

				mesh.material.defines.USE_PACKED_UV = 0;

			} else {

				// use quantized encoding method
				result = EncodingFuncs.quantizedEncodeUV( array, 2 );
				mesh.geometry.setAttribute( 'uv', new THREE.BufferAttribute( result.quantized, 2 ) );
				mesh.geometry.attributes.uv.isPacked = true;
				mesh.geometry.attributes.uv.needsUpdate = true;
				mesh.geometry.attributes.uv.bytes = result.quantized.length * 2;

				if ( ! ( mesh.material instanceof PackedPhongMaterial ) ) {

					mesh.material = new PackedPhongMaterial().copy( mesh.material );

				}

				mesh.material.defines.USE_PACKED_UV = 1;
				mesh.material.uniforms.quantizeMatUV.value = result.decodeMat;
				mesh.material.uniforms.quantizeMatUV.needsUpdate = true;

			}

		}

	}

	class EncodingFuncs {

		static defaultEncode( x, y, z, bytes ) {

			if ( bytes == 1 ) {

				const tmpx = Math.round( ( x + 1 ) * 0.5 * 255 );
				const tmpy = Math.round( ( y + 1 ) * 0.5 * 255 );
				const tmpz = Math.round( ( z + 1 ) * 0.5 * 255 );
				return new Uint8Array( [ tmpx, tmpy, tmpz ] );

			} else if ( bytes == 2 ) {

				const tmpx = Math.round( ( x + 1 ) * 0.5 * 65535 );
				const tmpy = Math.round( ( y + 1 ) * 0.5 * 65535 );
				const tmpz = Math.round( ( z + 1 ) * 0.5 * 65535 );
				return new Uint16Array( [ tmpx, tmpy, tmpz ] );

			} else {

				console.error( 'number of bytes must be 1 or 2' );

			}

		}

		static defaultDecode( array, bytes ) {

			if ( bytes == 1 ) {

				return [ array[ 0 ] / 255 * 2.0 - 1.0, array[ 1 ] / 255 * 2.0 - 1.0, array[ 2 ] / 255 * 2.0 - 1.0 ];

			} else if ( bytes == 2 ) {

				return [ array[ 0 ] / 65535 * 2.0 - 1.0, array[ 1 ] / 65535 * 2.0 - 1.0, array[ 2 ] / 65535 * 2.0 - 1.0 ];

			} else {

				console.error( 'number of bytes must be 1 or 2' );

			}

		} // for `Angles` encoding


		static anglesEncode( x, y, z ) {

			const normal0 = parseInt( 0.5 * ( 1.0 + Math.atan2( y, x ) / Math.PI ) * 65535 );
			const normal1 = parseInt( 0.5 * ( 1.0 + z ) * 65535 );
			return new Uint16Array( [ normal0, normal1 ] );

		} // for `Octahedron` encoding


		static octEncodeBest( x, y, z, bytes ) {

			let oct, dec, best, currentCos, bestCos; // Test various combinations of ceil and floor
			// to minimize rounding errors

			best = oct = octEncodeVec3( x, y, z, 'floor', 'floor' );
			dec = octDecodeVec2( oct );
			bestCos = dot( x, y, z, dec );
			oct = octEncodeVec3( x, y, z, 'ceil', 'floor' );
			dec = octDecodeVec2( oct );
			currentCos = dot( x, y, z, dec );

			if ( currentCos > bestCos ) {

				best = oct;
				bestCos = currentCos;

			}

			oct = octEncodeVec3( x, y, z, 'floor', 'ceil' );
			dec = octDecodeVec2( oct );
			currentCos = dot( x, y, z, dec );

			if ( currentCos > bestCos ) {

				best = oct;
				bestCos = currentCos;

			}

			oct = octEncodeVec3( x, y, z, 'ceil', 'ceil' );
			dec = octDecodeVec2( oct );
			currentCos = dot( x, y, z, dec );

			if ( currentCos > bestCos ) {

				best = oct;

			}

			return best;

			function octEncodeVec3( x0, y0, z0, xfunc, yfunc ) {

				let x = x0 / ( Math.abs( x0 ) + Math.abs( y0 ) + Math.abs( z0 ) );
				let y = y0 / ( Math.abs( x0 ) + Math.abs( y0 ) + Math.abs( z0 ) );

				if ( z < 0 ) {

					const tempx = ( 1 - Math.abs( y ) ) * ( x >= 0 ? 1 : - 1 );
					const tempy = ( 1 - Math.abs( x ) ) * ( y >= 0 ? 1 : - 1 );
					x = tempx;
					y = tempy;
					let diff = 1 - Math.abs( x ) - Math.abs( y );

					if ( diff > 0 ) {

						diff += 0.001;
						x += x > 0 ? diff / 2 : - diff / 2;
						y += y > 0 ? diff / 2 : - diff / 2;

					}

				}

				if ( bytes == 1 ) {

					return new Int8Array( [ Math[ xfunc ]( x * 127.5 + ( x < 0 ? 1 : 0 ) ), Math[ yfunc ]( y * 127.5 + ( y < 0 ? 1 : 0 ) ) ] );

				}

				if ( bytes == 2 ) {

					return new Int16Array( [ Math[ xfunc ]( x * 32767.5 + ( x < 0 ? 1 : 0 ) ), Math[ yfunc ]( y * 32767.5 + ( y < 0 ? 1 : 0 ) ) ] );

				}

			}

			function octDecodeVec2( oct ) {

				let x = oct[ 0 ];
				let y = oct[ 1 ];

				if ( bytes == 1 ) {

					x /= x < 0 ? 127 : 128;
					y /= y < 0 ? 127 : 128;

				} else if ( bytes == 2 ) {

					x /= x < 0 ? 32767 : 32768;
					y /= y < 0 ? 32767 : 32768;

				}

				const z = 1 - Math.abs( x ) - Math.abs( y );

				if ( z < 0 ) {

					const tmpx = x;
					x = ( 1 - Math.abs( y ) ) * ( x >= 0 ? 1 : - 1 );
					y = ( 1 - Math.abs( tmpx ) ) * ( y >= 0 ? 1 : - 1 );

				}

				const length = Math.sqrt( x * x + y * y + z * z );
				return [ x / length, y / length, z / length ];

			}

			function dot( x, y, z, vec3 ) {

				return x * vec3[ 0 ] + y * vec3[ 1 ] + z * vec3[ 2 ];

			}

		}

		static quantizedEncode( array, bytes ) {

			let quantized, segments;

			if ( bytes == 1 ) {

				quantized = new Uint8Array( array.length );
				segments = 255;

			} else if ( bytes == 2 ) {

				quantized = new Uint16Array( array.length );
				segments = 65535;

			} else {

				console.error( 'number of bytes error! ' );

			}

			const decodeMat = new THREE.Matrix4();
			const min = new Float32Array( 3 );
			const max = new Float32Array( 3 );
			min[ 0 ] = min[ 1 ] = min[ 2 ] = Number.MAX_VALUE;
			max[ 0 ] = max[ 1 ] = max[ 2 ] = - Number.MAX_VALUE;

			for ( let i = 0; i < array.length; i += 3 ) {

				min[ 0 ] = Math.min( min[ 0 ], array[ i + 0 ] );
				min[ 1 ] = Math.min( min[ 1 ], array[ i + 1 ] );
				min[ 2 ] = Math.min( min[ 2 ], array[ i + 2 ] );
				max[ 0 ] = Math.max( max[ 0 ], array[ i + 0 ] );
				max[ 1 ] = Math.max( max[ 1 ], array[ i + 1 ] );
				max[ 2 ] = Math.max( max[ 2 ], array[ i + 2 ] );

			}

			decodeMat.scale( new THREE.Vector3( ( max[ 0 ] - min[ 0 ] ) / segments, ( max[ 1 ] - min[ 1 ] ) / segments, ( max[ 2 ] - min[ 2 ] ) / segments ) );
			decodeMat.elements[ 12 ] = min[ 0 ];
			decodeMat.elements[ 13 ] = min[ 1 ];
			decodeMat.elements[ 14 ] = min[ 2 ];
			decodeMat.transpose();
			const multiplier = new Float32Array( [ max[ 0 ] !== min[ 0 ] ? segments / ( max[ 0 ] - min[ 0 ] ) : 0, max[ 1 ] !== min[ 1 ] ? segments / ( max[ 1 ] - min[ 1 ] ) : 0, max[ 2 ] !== min[ 2 ] ? segments / ( max[ 2 ] - min[ 2 ] ) : 0 ] );

			for ( let i = 0; i < array.length; i += 3 ) {

				quantized[ i + 0 ] = Math.floor( ( array[ i + 0 ] - min[ 0 ] ) * multiplier[ 0 ] );
				quantized[ i + 1 ] = Math.floor( ( array[ i + 1 ] - min[ 1 ] ) * multiplier[ 1 ] );
				quantized[ i + 2 ] = Math.floor( ( array[ i + 2 ] - min[ 2 ] ) * multiplier[ 2 ] );

			}

			return {
				quantized: quantized,
				decodeMat: decodeMat
			};

		}

		static quantizedEncodeUV( array, bytes ) {

			let quantized, segments;

			if ( bytes == 1 ) {

				quantized = new Uint8Array( array.length );
				segments = 255;

			} else if ( bytes == 2 ) {

				quantized = new Uint16Array( array.length );
				segments = 65535;

			} else {

				console.error( 'number of bytes error! ' );

			}

			const decodeMat = new THREE.Matrix3();
			const min = new Float32Array( 2 );
			const max = new Float32Array( 2 );
			min[ 0 ] = min[ 1 ] = Number.MAX_VALUE;
			max[ 0 ] = max[ 1 ] = - Number.MAX_VALUE;

			for ( let i = 0; i < array.length; i += 2 ) {

				min[ 0 ] = Math.min( min[ 0 ], array[ i + 0 ] );
				min[ 1 ] = Math.min( min[ 1 ], array[ i + 1 ] );
				max[ 0 ] = Math.max( max[ 0 ], array[ i + 0 ] );
				max[ 1 ] = Math.max( max[ 1 ], array[ i + 1 ] );

			}

			decodeMat.scale( ( max[ 0 ] - min[ 0 ] ) / segments, ( max[ 1 ] - min[ 1 ] ) / segments );
			decodeMat.elements[ 6 ] = min[ 0 ];
			decodeMat.elements[ 7 ] = min[ 1 ];
			decodeMat.transpose();
			const multiplier = new Float32Array( [ max[ 0 ] !== min[ 0 ] ? segments / ( max[ 0 ] - min[ 0 ] ) : 0, max[ 1 ] !== min[ 1 ] ? segments / ( max[ 1 ] - min[ 1 ] ) : 0 ] );

			for ( let i = 0; i < array.length; i += 2 ) {

				quantized[ i + 0 ] = Math.floor( ( array[ i + 0 ] - min[ 0 ] ) * multiplier[ 0 ] );
				quantized[ i + 1 ] = Math.floor( ( array[ i + 1 ] - min[ 1 ] ) * multiplier[ 1 ] );

			}

			return {
				quantized: quantized,
				decodeMat: decodeMat
			};

		}

	}
	/**
 * `PackedPhongMaterial` inherited from THREE.MeshPhongMaterial
 *
 * @param {Object} parameters
 */


	class PackedPhongMaterial extends THREE.MeshPhongMaterial {

		constructor( parameters ) {

			super();
			this.defines = {};
			this.type = 'PackedPhongMaterial';
			this.uniforms = THREE.UniformsUtils.merge( [ THREE.ShaderLib.phong.uniforms, {
				quantizeMatPos: {
					value: null
				},
				quantizeMatUV: {
					value: null
				}
			} ] );
			this.vertexShader = [ '#define PHONG', 'varying vec3 vViewPosition;', '#ifndef FLAT_SHADED', 'varying vec3 vNormal;', '#endif', THREE.ShaderChunk.common, THREE.ShaderChunk.uv_pars_vertex, THREE.ShaderChunk.uv2_pars_vertex, THREE.ShaderChunk.displacementmap_pars_vertex, THREE.ShaderChunk.envmap_pars_vertex, THREE.ShaderChunk.color_pars_vertex, THREE.ShaderChunk.fog_pars_vertex, THREE.ShaderChunk.morphtarget_pars_vertex, THREE.ShaderChunk.skinning_pars_vertex, THREE.ShaderChunk.shadowmap_pars_vertex, THREE.ShaderChunk.logdepthbuf_pars_vertex, THREE.ShaderChunk.clipping_planes_pars_vertex, `#ifdef USE_PACKED_NORMAL
					#if USE_PACKED_NORMAL == 0
						vec3 decodeNormal(vec3 packedNormal)
						{
							float x = packedNormal.x * 2.0 - 1.0;
							float y = packedNormal.y * 2.0 - 1.0;
							vec2 scth = vec2(sin(x * PI), cos(x * PI));
							vec2 scphi = vec2(sqrt(1.0 - y * y), y);
							return normalize( vec3(scth.y * scphi.x, scth.x * scphi.x, scphi.y) );
						}
					#endif

					#if USE_PACKED_NORMAL == 1
						vec3 decodeNormal(vec3 packedNormal)
						{
							vec3 v = vec3(packedNormal.xy, 1.0 - abs(packedNormal.x) - abs(packedNormal.y));
							if (v.z < 0.0)
							{
								v.xy = (1.0 - abs(v.yx)) * vec2((v.x >= 0.0) ? +1.0 : -1.0, (v.y >= 0.0) ? +1.0 : -1.0);
							}
							return normalize(v);
						}
					#endif

					#if USE_PACKED_NORMAL == 2
						vec3 decodeNormal(vec3 packedNormal)
						{
							vec3 v = (packedNormal * 2.0) - 1.0;
							return normalize(v);
						}
					#endif
				#endif`, `#ifdef USE_PACKED_POSITION
					#if USE_PACKED_POSITION == 0
						uniform mat4 quantizeMatPos;
					#endif
				#endif`, `#ifdef USE_PACKED_UV
					#if USE_PACKED_UV == 1
						uniform mat3 quantizeMatUV;
					#endif
				#endif`, `#ifdef USE_PACKED_UV
					#if USE_PACKED_UV == 0
						vec2 decodeUV(vec2 packedUV)
						{
							vec2 uv = (packedUV * 2.0) - 1.0;
							return uv;
						}
					#endif

					#if USE_PACKED_UV == 1
						vec2 decodeUV(vec2 packedUV)
						{
							vec2 uv = ( vec3(packedUV, 1.0) * quantizeMatUV ).xy;
							return uv;
						}
					#endif
				#endif`, 'void main() {', THREE.ShaderChunk.uv_vertex, `#ifdef USE_UV
					#ifdef USE_PACKED_UV
						vUv = decodeUV(vUv);
					#endif
				#endif`, THREE.ShaderChunk.uv2_vertex, THREE.ShaderChunk.color_vertex, THREE.ShaderChunk.beginnormal_vertex, `#ifdef USE_PACKED_NORMAL
					objectNormal = decodeNormal(objectNormal);
				#endif

				#ifdef USE_TANGENT
					vec3 objectTangent = vec3( tangent.xyz );
				#endif
				`, THREE.ShaderChunk.morphnormal_vertex, THREE.ShaderChunk.skinbase_vertex, THREE.ShaderChunk.skinnormal_vertex, THREE.ShaderChunk.defaultnormal_vertex, '#ifndef FLAT_SHADED', '	vNormal = normalize( transformedNormal );', '#endif', THREE.ShaderChunk.begin_vertex, `#ifdef USE_PACKED_POSITION
					#if USE_PACKED_POSITION == 0
						transformed = ( vec4(transformed, 1.0) * quantizeMatPos ).xyz;
					#endif
				#endif`, THREE.ShaderChunk.morphtarget_vertex, THREE.ShaderChunk.skinning_vertex, THREE.ShaderChunk.displacementmap_vertex, THREE.ShaderChunk.project_vertex, THREE.ShaderChunk.logdepthbuf_vertex, THREE.ShaderChunk.clipping_planes_vertex, 'vViewPosition = - mvPosition.xyz;', THREE.ShaderChunk.worldpos_vertex, THREE.ShaderChunk.envmap_vertex, THREE.ShaderChunk.shadowmap_vertex, THREE.ShaderChunk.fog_vertex, '}' ].join( '\n' ); // Use the original THREE.MeshPhongMaterial's fragmentShader.

			this.fragmentShader = [ '#define PHONG', 'uniform vec3 diffuse;', 'uniform vec3 emissive;', 'uniform vec3 specular;', 'uniform float shininess;', 'uniform float opacity;', THREE.ShaderChunk.common, THREE.ShaderChunk.packing, THREE.ShaderChunk.dithering_pars_fragment, THREE.ShaderChunk.color_pars_fragment, THREE.ShaderChunk.uv_pars_fragment, THREE.ShaderChunk.uv2_pars_fragment, THREE.ShaderChunk.map_pars_fragment, THREE.ShaderChunk.alphamap_pars_fragment, THREE.ShaderChunk.aomap_pars_fragment, THREE.ShaderChunk.lightmap_pars_fragment, THREE.ShaderChunk.emissivemap_pars_fragment, THREE.ShaderChunk.envmap_common_pars_fragment, THREE.ShaderChunk.envmap_pars_fragment, THREE.ShaderChunk.cube_uv_reflection_fragment, THREE.ShaderChunk.fog_pars_fragment, THREE.ShaderChunk.bsdfs, THREE.ShaderChunk.lights_pars_begin, THREE.ShaderChunk.lights_phong_pars_fragment, THREE.ShaderChunk.shadowmap_pars_fragment, THREE.ShaderChunk.bumpmap_pars_fragment, THREE.ShaderChunk.normalmap_pars_fragment, THREE.ShaderChunk.specularmap_pars_fragment, THREE.ShaderChunk.logdepthbuf_pars_fragment, THREE.ShaderChunk.clipping_planes_pars_fragment, 'void main() {', THREE.ShaderChunk.clipping_planes_fragment, 'vec4 diffuseColor = vec4( diffuse, opacity );', 'ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );', 'vec3 totalEmissiveRadiance = emissive;', THREE.ShaderChunk.logdepthbuf_fragment, THREE.ShaderChunk.map_fragment, THREE.ShaderChunk.color_fragment, THREE.ShaderChunk.alphamap_fragment, THREE.ShaderChunk.alphatest_fragment, THREE.ShaderChunk.specularmap_fragment, THREE.ShaderChunk.normal_fragment_begin, THREE.ShaderChunk.normal_fragment_maps, THREE.ShaderChunk.emissivemap_fragment, // accumulation
				THREE.ShaderChunk.lights_phong_fragment, THREE.ShaderChunk.lights_fragment_begin, THREE.ShaderChunk.lights_fragment_maps, THREE.ShaderChunk.lights_fragment_end, // modulation
				THREE.ShaderChunk.aomap_fragment, 'vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;', THREE.ShaderChunk.envmap_fragment, 'gl_FragColor = vec4( outgoingLight, diffuseColor.a );', THREE.ShaderChunk.tonemapping_fragment, THREE.ShaderChunk.encodings_fragment, THREE.ShaderChunk.fog_fragment, THREE.ShaderChunk.premultiplied_alpha_fragment, THREE.ShaderChunk.dithering_fragment, '}' ].join( '\n' );
			this.setValues( parameters );

		}

	}

	THREE.GeometryCompressionUtils = GeometryCompressionUtils;
	THREE.PackedPhongMaterial = PackedPhongMaterial;

} )();