text: /**
   * @author mrdoob / http://mrdoob.com/
   */
  
  import {
  	AnimationClip,
  	BufferGeometry,
  	FileLoader,
  	Float32BufferAttribute,
  	Loader,
  	Vector3
  } from "../../../build/three.module.js";
  
  var MD2Loader = function ( manager ) {
  
  	Loader.call( this, manager );
  
  };
  
  MD2Loader.prototype = Object.assign( Object.create( Loader.prototype ), {
  
  	constructor: MD2Loader,
  
  	load: function ( url, onLoad, onProgress, onError ) {
  
  		var scope = this;
  
  		var loader = new FileLoader( scope.manager );
  		loader.setPath( scope.path );
  		loader.setResponseType( 'arraybuffer' );
  		loader.load( url, function ( buffer ) {
  
  			onLoad( scope.parse( buffer ) );
  
  		}, 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 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 Vector3();
  			var scale = new 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 Float32BufferAttribute( positions, 3 ) );
  			geometry.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
  			geometry.setAttribute( 'uv', new 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 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 Float32BufferAttribute( normals, 3 );
  					normalAttribute.name = attributeName;
  
  					morphNormals.push( normalAttribute );
  
  				}
  
  			}
  
  			geometry.morphAttributes.position = morphPositions;
  			geometry.morphAttributes.normal = morphNormals;
  			geometry.morphTargetsRelative = false;
  
  			geometry.animations = AnimationClip.CreateClipsFromMorphTargetSequences( frames, 10 );
  
  			return geometry;
  
  		};
  
  	} )()
  
  } );
  
  export { MD2Loader };
  