three.js/examples/js/loaders/MD2Loader.js

( function () {

	var MD2Loader = function ( manager ) {

		THREE.Loader.call( this, manager );

	};

	MD2Loader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {
		constructor: MD2Loader,
		load: function ( url, onLoad, onProgress, onError ) {

			var scope = this;
			var loader = new THREE.FileLoader( scope.manager );
			loader.setPath( scope.path );
			loader.setResponseType( 'arraybuffer' );
			loader.setRequestHeader( scope.requestHeader );
			loader.setWithCredentials( scope.withCredentials );
			loader.load( url, function ( buffer ) {

				try {

					onLoad( scope.parse( buffer ) );

				} catch ( e ) {

					if ( onError ) {

						onError( e );

					} else {

						console.error( e );

					}

					scope.manager.itemError( url );

				}

			}, onProgress, onError );

		},
		parse: function () {

			var normalData = [[ - 0.525731, 0.000000, 0.850651 ], [ - 0.442863, 0.238856, 0.864188 ], [ - 0.295242, 0.000000, 0.955423 ], [ - 0.309017, 0.500000, 0.809017 ], [ - 0.162460, 0.262866, 0.951056 ], [ 0.000000, 0.000000, 1.000000 ], [ 0.000000, 0.850651, 0.525731 ], [ - 0.147621, 0.716567, 0.681718 ], [ 0.147621, 0.716567, 0.681718 ], [ 0.000000, 0.525731, 0.850651 ], [ 0.309017, 0.500000, 0.809017 ], [ 0.525731, 0.000000, 0.850651 ], [ 0.295242, 0.000000, 0.955423 ], [ 0.442863, 0.238856, 0.864188 ], [ 0.162460, 0.262866, 0.951056 ], [ - 0.681718, 0.147621, 0.716567 ], [ - 0.809017, 0.309017, 0.500000 ], [ - 0.587785, 0.425325, 0.688191 ], [ - 0.850651, 0.525731, 0.000000 ], [ - 0.864188, 0.442863, 0.238856 ], [ - 0.716567, 0.681718, 0.147621 ], [ - 0.688191, 0.587785, 0.425325 ], [ - 0.500000, 0.809017, 0.309017 ], [ - 0.238856, 0.864188, 0.442863 ], [ - 0.425325, 0.688191, 0.587785 ], [ - 0.716567, 0.681718, - 0.147621 ], [ - 0.500000, 0.809017, - 0.309017 ], [ - 0.525731, 0.850651, 0.000000 ], [ 0.000000, 0.850651, - 0.525731 ], [ - 0.238856, 0.864188, - 0.442863 ], [ 0.000000, 0.955423, - 0.295242 ], [ - 0.262866, 0.951056, - 0.162460 ], [ 0.000000, 1.000000, 0.000000 ], [ 0.000000, 0.955423, 0.295242 ], [ - 0.262866, 0.951056, 0.162460 ], [ 0.238856, 0.864188, 0.442863 ], [ 0.262866, 0.951056, 0.162460 ], [ 0.500000, 0.809017, 0.309017 ], [ 0.238856, 0.864188, - 0.442863 ], [ 0.262866, 0.951056, - 0.162460 ], [ 0.500000, 0.809017, - 0.309017 ], [ 0.850651, 0.525731, 0.000000 ], [ 0.716567, 0.681718, 0.147621 ], [ 0.716567, 0.681718, - 0.147621 ], [ 0.525731, 0.850651, 0.000000 ], [ 0.425325, 0.688191, 0.587785 ], [ 0.864188, 0.442863, 0.238856 ], [ 0.688191, 0.587785, 0.425325 ], [ 0.809017, 0.309017, 0.500000 ], [ 0.681718, 0.147621, 0.716567 ], [ 0.587785, 0.425325, 0.688191 ], [ 0.955423, 0.295242, 0.000000 ], [ 1.000000, 0.000000, 0.000000 ], [ 0.951056, 0.162460, 0.262866 ], [ 0.850651, - 0.525731, 0.000000 ], [ 0.955423, - 0.295242, 0.000000 ], [ 0.864188, - 0.442863, 0.238856 ], [ 0.951056, - 0.162460, 0.262866 ], [ 0.809017, - 0.309017, 0.500000 ], [ 0.681718, - 0.147621, 0.716567 ], [ 0.850651, 0.000000, 0.525731 ], [ 0.864188, 0.442863, - 0.238856 ], [ 0.809017, 0.309017, - 0.500000 ], [ 0.951056, 0.162460, - 0.262866 ], [ 0.525731, 0.000000, - 0.850651 ], [ 0.681718, 0.147621, - 0.716567 ], [ 0.681718, - 0.147621, - 0.716567 ], [ 0.850651, 0.000000, - 0.525731 ], [ 0.809017, - 0.309017, - 0.500000 ], [ 0.864188, - 0.442863, - 0.238856 ], [ 0.951056, - 0.162460, - 0.262866 ], [ 0.147621, 0.716567, - 0.681718 ], [ 0.309017, 0.500000, - 0.809017 ], [ 0.425325, 0.688191, - 0.587785 ], [ 0.442863, 0.238856, - 0.864188 ], [ 0.587785, 0.425325, - 0.688191 ], [ 0.688191, 0.587785, - 0.425325 ], [ - 0.147621, 0.716567, - 0.681718 ], [ - 0.309017, 0.500000, - 0.809017 ], [ 0.000000, 0.525731, - 0.850651 ], [ - 0.525731, 0.000000, - 0.850651 ], [ - 0.442863, 0.238856, - 0.864188 ], [ - 0.295242, 0.000000, - 0.955423 ], [ - 0.162460, 0.262866, - 0.951056 ], [ 0.000000, 0.000000, - 1.000000 ], [ 0.295242, 0.000000, - 0.955423 ], [ 0.162460, 0.262866, - 0.951056 ], [ - 0.442863, - 0.238856, - 0.864188 ], [ - 0.309017, - 0.500000, - 0.809017 ], [ - 0.162460, - 0.262866, - 0.951056 ], [ 0.000000, - 0.850651, - 0.525731 ], [ - 0.147621, - 0.716567, - 0.681718 ], [ 0.147621, - 0.716567, - 0.681718 ], [ 0.000000, - 0.525731, - 0.850651 ], [ 0.309017, - 0.500000, - 0.809017 ], [ 0.442863, - 0.238856, - 0.864188 ], [ 0.162460, - 0.262866, - 0.951056 ], [ 0.238856, - 0.864188, - 0.442863 ], [ 0.500000, - 0.809017, - 0.309017 ], [ 0.425325, - 0.688191, - 0.587785 ], [ 0.716567, - 0.681718, - 0.147621 ], [ 0.688191, - 0.587785, - 0.425325 ], [ 0.587785, - 0.425325, - 0.688191 ], [ 0.000000, - 0.955423, - 0.295242 ], [ 0.000000, - 1.000000, 0.000000 ], [ 0.262866, - 0.951056, - 0.162460 ], [ 0.000000, - 0.850651, 0.525731 ], [ 0.000000, - 0.955423, 0.295242 ], [ 0.238856, - 0.864188, 0.442863 ], [ 0.262866, - 0.951056, 0.162460 ], [ 0.500000, - 0.809017, 0.309017 ], [ 0.716567, - 0.681718, 0.147621 ], [ 0.525731, - 0.850651, 0.000000 ], [ - 0.238856, - 0.864188, - 0.442863 ], [ - 0.500000, - 0.809017, - 0.309017 ], [ - 0.262866, - 0.951056, - 0.162460 ], [ - 0.850651, - 0.525731, 0.000000 ], [ - 0.716567, - 0.681718, - 0.147621 ], [ - 0.716567, - 0.681718, 0.147621 ], [ - 0.525731, - 0.850651, 0.000000 ], [ - 0.500000, - 0.809017, 0.309017 ], [ - 0.238856, - 0.864188, 0.442863 ], [ - 0.262866, - 0.951056, 0.162460 ], [ - 0.864188, - 0.442863, 0.238856 ], [ - 0.809017, - 0.309017, 0.500000 ], [ - 0.688191, - 0.587785, 0.425325 ], [ - 0.681718, - 0.147621, 0.716567 ], [ - 0.442863, - 0.238856, 0.864188 ], [ - 0.587785, - 0.425325, 0.688191 ], [ - 0.309017, - 0.500000, 0.809017 ], [ - 0.147621, - 0.716567, 0.681718 ], [ - 0.425325, - 0.688191, 0.587785 ], [ - 0.162460, - 0.262866, 0.951056 ], [ 0.442863, - 0.238856, 0.864188 ], [ 0.162460, - 0.262866, 0.951056 ], [ 0.309017, - 0.500000, 0.809017 ], [ 0.147621, - 0.716567, 0.681718 ], [ 0.000000, - 0.525731, 0.850651 ], [ 0.425325, - 0.688191, 0.587785 ], [ 0.587785, - 0.425325, 0.688191 ], [ 0.688191, - 0.587785, 0.425325 ], [ - 0.955423, 0.295242, 0.000000 ], [ - 0.951056, 0.162460, 0.262866 ], [ - 1.000000, 0.000000, 0.000000 ], [ - 0.850651, 0.000000, 0.525731 ], [ - 0.955423, - 0.295242, 0.000000 ], [ - 0.951056, - 0.162460, 0.262866 ], [ - 0.864188, 0.442863, - 0.238856 ], [ - 0.951056, 0.162460, - 0.262866 ], [ - 0.809017, 0.309017, - 0.500000 ], [ - 0.864188, - 0.442863, - 0.238856 ], [ - 0.951056, - 0.162460, - 0.262866 ], [ - 0.809017, - 0.309017, - 0.500000 ], [ - 0.681718, 0.147621, - 0.716567 ], [ - 0.681718, - 0.147621, - 0.716567 ], [ - 0.850651, 0.000000, - 0.525731 ], [ - 0.688191, 0.587785, - 0.425325 ], [ - 0.587785, 0.425325, - 0.688191 ], [ - 0.425325, 0.688191, - 0.587785 ], [ - 0.425325, - 0.688191, - 0.587785 ], [ - 0.587785, - 0.425325, - 0.688191 ], [ - 0.688191, - 0.587785, - 0.425325 ]];
			return function ( buffer ) {

				var data = new DataView( buffer ); // http://tfc.duke.free.fr/coding/md2-specs-en.html

				var header = {};
				var headerNames = [ 'ident', 'version', 'skinwidth', 'skinheight', 'framesize', 'num_skins', 'num_vertices', 'num_st', 'num_tris', 'num_glcmds', 'num_frames', 'offset_skins', 'offset_st', 'offset_tris', 'offset_frames', 'offset_glcmds', 'offset_end' ];

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

					header[ headerNames[ i ] ] = data.getInt32( i * 4, true );

				}

				if ( header.ident !== 844121161 || header.version !== 8 ) {

					console.error( 'Not a valid MD2 file' );
					return;

				}

				if ( header.offset_end !== data.byteLength ) {

					console.error( 'Corrupted MD2 file' );
					return;

				} //


				var geometry = new THREE.BufferGeometry(); // uvs

				var uvsTemp = [];
				var offset = header.offset_st;

				for ( var i = 0, l = header.num_st; i < l; i ++ ) {

					var u = data.getInt16( offset + 0, true );
					var v = data.getInt16( offset + 2, true );
					uvsTemp.push( u / header.skinwidth, 1 - v / header.skinheight );
					offset += 4;

				} // triangles


				offset = header.offset_tris;
				var vertexIndices = [];
				var uvIndices = [];

				for ( var i = 0, l = header.num_tris; i < l; i ++ ) {

					vertexIndices.push( data.getUint16( offset + 0, true ), data.getUint16( offset + 2, true ), data.getUint16( offset + 4, true ) );
					uvIndices.push( data.getUint16( offset + 6, true ), data.getUint16( offset + 8, true ), data.getUint16( offset + 10, true ) );
					offset += 12;

				} // frames


				var translation = new THREE.Vector3();
				var scale = new THREE.Vector3();
				var string = [];
				var frames = [];
				offset = header.offset_frames;

				for ( var i = 0, l = header.num_frames; i < l; i ++ ) {

					scale.set( data.getFloat32( offset + 0, true ), data.getFloat32( offset + 4, true ), data.getFloat32( offset + 8, true ) );
					translation.set( data.getFloat32( offset + 12, true ), data.getFloat32( offset + 16, true ), data.getFloat32( offset + 20, true ) );
					offset += 24;

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

						var character = data.getUint8( offset + j, true );
						if ( character === 0 ) break;
						string[ j ] = character;

					}

					var frame = {
						name: String.fromCharCode.apply( null, string ),
						vertices: [],
						normals: []
					};
					offset += 16;

					for ( var j = 0; j < header.num_vertices; j ++ ) {

						var x = data.getUint8( offset ++, true );
						var y = data.getUint8( offset ++, true );
						var z = data.getUint8( offset ++, true );
						var n = normalData[ data.getUint8( offset ++, true ) ];
						x = x * scale.x + translation.x;
						y = y * scale.y + translation.y;
						z = z * scale.z + translation.z;
						frame.vertices.push( x, z, y ); // convert to Y-up

						frame.normals.push( n[ 0 ], n[ 2 ], n[ 1 ] ); // convert to Y-up

					}

					frames.push( frame );

				} // static


				var positions = [];
				var normals = [];
				var uvs = [];
				var verticesTemp = frames[ 0 ].vertices;
				var normalsTemp = frames[ 0 ].normals;

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

					var vertexIndex = vertexIndices[ i ];
					var stride = vertexIndex * 3; //

					var x = verticesTemp[ stride ];
					var y = verticesTemp[ stride + 1 ];
					var z = verticesTemp[ stride + 2 ];
					positions.push( x, y, z ); //

					var nx = normalsTemp[ stride ];
					var ny = normalsTemp[ stride + 1 ];
					var nz = normalsTemp[ stride + 2 ];
					normals.push( nx, ny, nz ); //

					var uvIndex = uvIndices[ i ];
					stride = uvIndex * 2;
					var u = uvsTemp[ stride ];
					var v = uvsTemp[ stride + 1 ];
					uvs.push( u, v );

				}

				geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
				geometry.setAttribute( 'normal', new THREE.Float32BufferAttribute( normals, 3 ) );
				geometry.setAttribute( 'uv', new THREE.Float32BufferAttribute( uvs, 2 ) ); // animation

				var morphPositions = [];
				var morphNormals = [];

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

					var frame = frames[ i ];
					var attributeName = frame.name;

					if ( frame.vertices.length > 0 ) {

						var positions = [];

						for ( var j = 0, jl = vertexIndices.length; j < jl; j ++ ) {

							var vertexIndex = vertexIndices[ j ];
							var stride = vertexIndex * 3;
							var x = frame.vertices[ stride ];
							var y = frame.vertices[ stride + 1 ];
							var z = frame.vertices[ stride + 2 ];
							positions.push( x, y, z );

						}

						var positionAttribute = new THREE.Float32BufferAttribute( positions, 3 );
						positionAttribute.name = attributeName;
						morphPositions.push( positionAttribute );

					}

					if ( frame.normals.length > 0 ) {

						var normals = [];

						for ( var j = 0, jl = vertexIndices.length; j < jl; j ++ ) {

							var vertexIndex = vertexIndices[ j ];
							var stride = vertexIndex * 3;
							var nx = frame.normals[ stride ];
							var ny = frame.normals[ stride + 1 ];
							var nz = frame.normals[ stride + 2 ];
							normals.push( nx, ny, nz );

						}

						var normalAttribute = new THREE.Float32BufferAttribute( normals, 3 );
						normalAttribute.name = attributeName;
						morphNormals.push( normalAttribute );

					}

				}

				geometry.morphAttributes.position = morphPositions;
				geometry.morphAttributes.normal = morphNormals;
				geometry.morphTargetsRelative = false;
				geometry.animations = THREE.AnimationClip.CreateClipsFromMorphTargetSequences( frames, 10 );
				return geometry;

			};

		}()
	} );

	THREE.MD2Loader = MD2Loader;

} )();