three.js/examples/js/loaders/FBXLoader.js

( function () {

	/**
 * THREE.Loader loads FBX file and generates THREE.Group representing FBX scene.
 * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
 * Versions lower than this may load but will probably have errors
 *
 * Needs Support:
 *  Morph normals / blend shape normals
 *
 * FBX format references:
 * 	https://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
 *
 * Binary format specification:
 *	https://code.blender.org/2013/08/fbx-binary-file-format-specification/
 */

	let fbxTree;
	let connections;
	let sceneGraph;
	class FBXLoader extends THREE.Loader {

		constructor( manager ) {

			super( manager );

		}
		load( url, onLoad, onProgress, onError ) {

			const scope = this;
			const path = scope.path === '' ? THREE.LoaderUtils.extractUrlBase( url ) : scope.path;
			const loader = new THREE.FileLoader( this.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, path ) );

				} catch ( e ) {

					if ( onError ) {

						onError( e );

					} else {

						console.error( e );

					}

					scope.manager.itemError( url );

				}

			}, onProgress, onError );

		}
		parse( FBXBuffer, path ) {

			if ( isFbxFormatBinary( FBXBuffer ) ) {

				fbxTree = new BinaryParser().parse( FBXBuffer );

			} else {

				const FBXText = convertArrayBufferToString( FBXBuffer );
				if ( ! isFbxFormatASCII( FBXText ) ) {

					throw new Error( 'THREE.FBXLoader: Unknown format.' );

				}

				if ( getFbxVersion( FBXText ) < 7000 ) {

					throw new Error( 'THREE.FBXLoader: FBX version not supported, FileVersion: ' + getFbxVersion( FBXText ) );

				}

				fbxTree = new TextParser().parse( FBXText );

			}

			// console.log( fbxTree );

			const textureLoader = new THREE.TextureLoader( this.manager ).setPath( this.resourcePath || path ).setCrossOrigin( this.crossOrigin );
			return new FBXTreeParser( textureLoader, this.manager ).parse( fbxTree );

		}

	}

	// Parse the FBXTree object returned by the BinaryParser or TextParser and return a THREE.Group
	class FBXTreeParser {

		constructor( textureLoader, manager ) {

			this.textureLoader = textureLoader;
			this.manager = manager;

		}
		parse() {

			connections = this.parseConnections();
			const images = this.parseImages();
			const textures = this.parseTextures( images );
			const materials = this.parseMaterials( textures );
			const deformers = this.parseDeformers();
			const geometryMap = new GeometryParser().parse( deformers );
			this.parseScene( deformers, geometryMap, materials );
			return sceneGraph;

		}

		// Parses FBXTree.Connections which holds parent-child connections between objects (e.g. material -> texture, model->geometry )
		// and details the connection type
		parseConnections() {

			const connectionMap = new Map();
			if ( 'Connections' in fbxTree ) {

				const rawConnections = fbxTree.Connections.connections;
				rawConnections.forEach( function ( rawConnection ) {

					const fromID = rawConnection[ 0 ];
					const toID = rawConnection[ 1 ];
					const relationship = rawConnection[ 2 ];
					if ( ! connectionMap.has( fromID ) ) {

						connectionMap.set( fromID, {
							parents: [],
							children: []
						} );

					}

					const parentRelationship = {
						ID: toID,
						relationship: relationship
					};
					connectionMap.get( fromID ).parents.push( parentRelationship );
					if ( ! connectionMap.has( toID ) ) {

						connectionMap.set( toID, {
							parents: [],
							children: []
						} );

					}

					const childRelationship = {
						ID: fromID,
						relationship: relationship
					};
					connectionMap.get( toID ).children.push( childRelationship );

				} );

			}

			return connectionMap;

		}

		// Parse FBXTree.Objects.Video for embedded image data
		// These images are connected to textures in FBXTree.Objects.Textures
		// via FBXTree.Connections.
		parseImages() {

			const images = {};
			const blobs = {};
			if ( 'Video' in fbxTree.Objects ) {

				const videoNodes = fbxTree.Objects.Video;
				for ( const nodeID in videoNodes ) {

					const videoNode = videoNodes[ nodeID ];
					const id = parseInt( nodeID );
					images[ id ] = videoNode.RelativeFilename || videoNode.Filename;

					// raw image data is in videoNode.Content
					if ( 'Content' in videoNode ) {

						const arrayBufferContent = videoNode.Content instanceof ArrayBuffer && videoNode.Content.byteLength > 0;
						const base64Content = typeof videoNode.Content === 'string' && videoNode.Content !== '';
						if ( arrayBufferContent || base64Content ) {

							const image = this.parseImage( videoNodes[ nodeID ] );
							blobs[ videoNode.RelativeFilename || videoNode.Filename ] = image;

						}

					}

				}

			}

			for ( const id in images ) {

				const filename = images[ id ];
				if ( blobs[ filename ] !== undefined ) images[ id ] = blobs[ filename ]; else images[ id ] = images[ id ].split( '\\' ).pop();

			}

			return images;

		}

		// Parse embedded image data in FBXTree.Video.Content
		parseImage( videoNode ) {

			const content = videoNode.Content;
			const fileName = videoNode.RelativeFilename || videoNode.Filename;
			const extension = fileName.slice( fileName.lastIndexOf( '.' ) + 1 ).toLowerCase();
			let type;
			switch ( extension ) {

				case 'bmp':
					type = 'image/bmp';
					break;
				case 'jpg':
				case 'jpeg':
					type = 'image/jpeg';
					break;
				case 'png':
					type = 'image/png';
					break;
				case 'tif':
					type = 'image/tiff';
					break;
				case 'tga':
					if ( this.manager.getHandler( '.tga' ) === null ) {

						console.warn( 'FBXLoader: TGA loader not found, skipping ', fileName );

					}

					type = 'image/tga';
					break;
				default:
					console.warn( 'FBXLoader: Image type "' + extension + '" is not supported.' );
					return;

			}

			if ( typeof content === 'string' ) {

				// ASCII format

				return 'data:' + type + ';base64,' + content;

			} else {

				// Binary Format

				const array = new Uint8Array( content );
				return window.URL.createObjectURL( new Blob( [ array ], {
					type: type
				} ) );

			}

		}

		// Parse nodes in FBXTree.Objects.Texture
		// These contain details such as UV scaling, cropping, rotation etc and are connected
		// to images in FBXTree.Objects.Video
		parseTextures( images ) {

			const textureMap = new Map();
			if ( 'Texture' in fbxTree.Objects ) {

				const textureNodes = fbxTree.Objects.Texture;
				for ( const nodeID in textureNodes ) {

					const texture = this.parseTexture( textureNodes[ nodeID ], images );
					textureMap.set( parseInt( nodeID ), texture );

				}

			}

			return textureMap;

		}

		// Parse individual node in FBXTree.Objects.Texture
		parseTexture( textureNode, images ) {

			const texture = this.loadTexture( textureNode, images );
			texture.ID = textureNode.id;
			texture.name = textureNode.attrName;
			const wrapModeU = textureNode.WrapModeU;
			const wrapModeV = textureNode.WrapModeV;
			const valueU = wrapModeU !== undefined ? wrapModeU.value : 0;
			const valueV = wrapModeV !== undefined ? wrapModeV.value : 0;

			// http://download.autodesk.com/us/fbx/SDKdocs/FBX_SDK_Help/files/fbxsdkref/class_k_fbx_texture.html#889640e63e2e681259ea81061b85143a
			// 0: repeat(default), 1: clamp

			texture.wrapS = valueU === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
			texture.wrapT = valueV === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
			if ( 'Scaling' in textureNode ) {

				const values = textureNode.Scaling.value;
				texture.repeat.x = values[ 0 ];
				texture.repeat.y = values[ 1 ];

			}

			if ( 'Translation' in textureNode ) {

				const values = textureNode.Translation.value;
				texture.offset.x = values[ 0 ];
				texture.offset.y = values[ 1 ];

			}

			return texture;

		}

		// load a texture specified as a blob or data URI, or via an external URL using THREE.TextureLoader
		loadTexture( textureNode, images ) {

			let fileName;
			const currentPath = this.textureLoader.path;
			const children = connections.get( textureNode.id ).children;
			if ( children !== undefined && children.length > 0 && images[ children[ 0 ].ID ] !== undefined ) {

				fileName = images[ children[ 0 ].ID ];
				if ( fileName.indexOf( 'blob:' ) === 0 || fileName.indexOf( 'data:' ) === 0 ) {

					this.textureLoader.setPath( undefined );

				}

			}

			let texture;
			const extension = textureNode.FileName.slice( - 3 ).toLowerCase();
			if ( extension === 'tga' ) {

				const loader = this.manager.getHandler( '.tga' );
				if ( loader === null ) {

					console.warn( 'FBXLoader: TGA loader not found, creating placeholder texture for', textureNode.RelativeFilename );
					texture = new THREE.Texture();

				} else {

					loader.setPath( this.textureLoader.path );
					texture = loader.load( fileName );

				}

			} else if ( extension === 'psd' ) {

				console.warn( 'FBXLoader: PSD textures are not supported, creating placeholder texture for', textureNode.RelativeFilename );
				texture = new THREE.Texture();

			} else {

				texture = this.textureLoader.load( fileName );

			}

			this.textureLoader.setPath( currentPath );
			return texture;

		}

		// Parse nodes in FBXTree.Objects.Material
		parseMaterials( textureMap ) {

			const materialMap = new Map();
			if ( 'Material' in fbxTree.Objects ) {

				const materialNodes = fbxTree.Objects.Material;
				for ( const nodeID in materialNodes ) {

					const material = this.parseMaterial( materialNodes[ nodeID ], textureMap );
					if ( material !== null ) materialMap.set( parseInt( nodeID ), material );

				}

			}

			return materialMap;

		}

		// Parse single node in FBXTree.Objects.Material
		// Materials are connected to texture maps in FBXTree.Objects.Textures
		// FBX format currently only supports Lambert and Phong shading models
		parseMaterial( materialNode, textureMap ) {

			const ID = materialNode.id;
			const name = materialNode.attrName;
			let type = materialNode.ShadingModel;

			// Case where FBX wraps shading model in property object.
			if ( typeof type === 'object' ) {

				type = type.value;

			}

			// Ignore unused materials which don't have any connections.
			if ( ! connections.has( ID ) ) return null;
			const parameters = this.parseParameters( materialNode, textureMap, ID );
			let material;
			switch ( type.toLowerCase() ) {

				case 'phong':
					material = new THREE.MeshPhongMaterial();
					break;
				case 'lambert':
					material = new THREE.MeshLambertMaterial();
					break;
				default:
					console.warn( 'THREE.FBXLoader: unknown material type "%s". Defaulting to THREE.MeshPhongMaterial.', type );
					material = new THREE.MeshPhongMaterial();
					break;

			}

			material.setValues( parameters );
			material.name = name;
			return material;

		}

		// Parse FBX material and return parameters suitable for a three.js material
		// Also parse the texture map and return any textures associated with the material
		parseParameters( materialNode, textureMap, ID ) {

			const parameters = {};
			if ( materialNode.BumpFactor ) {

				parameters.bumpScale = materialNode.BumpFactor.value;

			}

			if ( materialNode.Diffuse ) {

				parameters.color = new THREE.Color().fromArray( materialNode.Diffuse.value );

			} else if ( materialNode.DiffuseColor && ( materialNode.DiffuseColor.type === 'Color' || materialNode.DiffuseColor.type === 'ColorRGB' ) ) {

				// The blender exporter exports diffuse here instead of in materialNode.Diffuse
				parameters.color = new THREE.Color().fromArray( materialNode.DiffuseColor.value );

			}

			if ( materialNode.DisplacementFactor ) {

				parameters.displacementScale = materialNode.DisplacementFactor.value;

			}

			if ( materialNode.Emissive ) {

				parameters.emissive = new THREE.Color().fromArray( materialNode.Emissive.value );

			} else if ( materialNode.EmissiveColor && ( materialNode.EmissiveColor.type === 'Color' || materialNode.EmissiveColor.type === 'ColorRGB' ) ) {

				// The blender exporter exports emissive color here instead of in materialNode.Emissive
				parameters.emissive = new THREE.Color().fromArray( materialNode.EmissiveColor.value );

			}

			if ( materialNode.EmissiveFactor ) {

				parameters.emissiveIntensity = parseFloat( materialNode.EmissiveFactor.value );

			}

			if ( materialNode.Opacity ) {

				parameters.opacity = parseFloat( materialNode.Opacity.value );

			}

			if ( parameters.opacity < 1.0 ) {

				parameters.transparent = true;

			}

			if ( materialNode.ReflectionFactor ) {

				parameters.reflectivity = materialNode.ReflectionFactor.value;

			}

			if ( materialNode.Shininess ) {

				parameters.shininess = materialNode.Shininess.value;

			}

			if ( materialNode.Specular ) {

				parameters.specular = new THREE.Color().fromArray( materialNode.Specular.value );

			} else if ( materialNode.SpecularColor && materialNode.SpecularColor.type === 'Color' ) {

				// The blender exporter exports specular color here instead of in materialNode.Specular
				parameters.specular = new THREE.Color().fromArray( materialNode.SpecularColor.value );

			}

			const scope = this;
			connections.get( ID ).children.forEach( function ( child ) {

				const type = child.relationship;
				switch ( type ) {

					case 'Bump':
						parameters.bumpMap = scope.getTexture( textureMap, child.ID );
						break;
					case 'Maya|TEX_ao_map':
						parameters.aoMap = scope.getTexture( textureMap, child.ID );
						break;
					case 'DiffuseColor':
					case 'Maya|TEX_color_map':
						parameters.map = scope.getTexture( textureMap, child.ID );
						if ( parameters.map !== undefined ) {

							parameters.map.encoding = THREE.sRGBEncoding;

						}

						break;
					case 'DisplacementColor':
						parameters.displacementMap = scope.getTexture( textureMap, child.ID );
						break;
					case 'EmissiveColor':
						parameters.emissiveMap = scope.getTexture( textureMap, child.ID );
						if ( parameters.emissiveMap !== undefined ) {

							parameters.emissiveMap.encoding = THREE.sRGBEncoding;

						}

						break;
					case 'NormalMap':
					case 'Maya|TEX_normal_map':
						parameters.normalMap = scope.getTexture( textureMap, child.ID );
						break;
					case 'ReflectionColor':
						parameters.envMap = scope.getTexture( textureMap, child.ID );
						if ( parameters.envMap !== undefined ) {

							parameters.envMap.mapping = THREE.EquirectangularReflectionMapping;
							parameters.envMap.encoding = THREE.sRGBEncoding;

						}

						break;
					case 'SpecularColor':
						parameters.specularMap = scope.getTexture( textureMap, child.ID );
						if ( parameters.specularMap !== undefined ) {

							parameters.specularMap.encoding = THREE.sRGBEncoding;

						}

						break;
					case 'TransparentColor':
					case 'TransparencyFactor':
						parameters.alphaMap = scope.getTexture( textureMap, child.ID );
						parameters.transparent = true;
						break;
					case 'AmbientColor':
					case 'ShininessExponent': // AKA glossiness map
					case 'SpecularFactor': // AKA specularLevel
					case 'VectorDisplacementColor': // NOTE: Seems to be a copy of DisplacementColor
					default:
						console.warn( 'THREE.FBXLoader: %s map is not supported in three.js, skipping texture.', type );
						break;

				}

			} );
			return parameters;

		}

		// get a texture from the textureMap for use by a material.
		getTexture( textureMap, id ) {

			// if the texture is a layered texture, just use the first layer and issue a warning
			if ( 'LayeredTexture' in fbxTree.Objects && id in fbxTree.Objects.LayeredTexture ) {

				console.warn( 'THREE.FBXLoader: layered textures are not supported in three.js. Discarding all but first layer.' );
				id = connections.get( id ).children[ 0 ].ID;

			}

			return textureMap.get( id );

		}

		// Parse nodes in FBXTree.Objects.Deformer
		// Deformer node can contain skinning or Vertex Cache animation data, however only skinning is supported here
		// Generates map of THREE.Skeleton-like objects for use later when generating and binding skeletons.
		parseDeformers() {

			const skeletons = {};
			const morphTargets = {};
			if ( 'Deformer' in fbxTree.Objects ) {

				const DeformerNodes = fbxTree.Objects.Deformer;
				for ( const nodeID in DeformerNodes ) {

					const deformerNode = DeformerNodes[ nodeID ];
					const relationships = connections.get( parseInt( nodeID ) );
					if ( deformerNode.attrType === 'Skin' ) {

						const skeleton = this.parseSkeleton( relationships, DeformerNodes );
						skeleton.ID = nodeID;
						if ( relationships.parents.length > 1 ) console.warn( 'THREE.FBXLoader: skeleton attached to more than one geometry is not supported.' );
						skeleton.geometryID = relationships.parents[ 0 ].ID;
						skeletons[ nodeID ] = skeleton;

					} else if ( deformerNode.attrType === 'BlendShape' ) {

						const morphTarget = {
							id: nodeID
						};
						morphTarget.rawTargets = this.parseMorphTargets( relationships, DeformerNodes );
						morphTarget.id = nodeID;
						if ( relationships.parents.length > 1 ) console.warn( 'THREE.FBXLoader: morph target attached to more than one geometry is not supported.' );
						morphTargets[ nodeID ] = morphTarget;

					}

				}

			}

			return {
				skeletons: skeletons,
				morphTargets: morphTargets
			};

		}

		// Parse single nodes in FBXTree.Objects.Deformer
		// The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster'
		// Each skin node represents a skeleton and each cluster node represents a bone
		parseSkeleton( relationships, deformerNodes ) {

			const rawBones = [];
			relationships.children.forEach( function ( child ) {

				const boneNode = deformerNodes[ child.ID ];
				if ( boneNode.attrType !== 'Cluster' ) return;
				const rawBone = {
					ID: child.ID,
					indices: [],
					weights: [],
					transformLink: new THREE.Matrix4().fromArray( boneNode.TransformLink.a )
					// transform: new THREE.Matrix4().fromArray( boneNode.Transform.a ),
					// linkMode: boneNode.Mode,
				};

				if ( 'Indexes' in boneNode ) {

					rawBone.indices = boneNode.Indexes.a;
					rawBone.weights = boneNode.Weights.a;

				}

				rawBones.push( rawBone );

			} );
			return {
				rawBones: rawBones,
				bones: []
			};

		}

		// The top level morph deformer node has type "BlendShape" and sub nodes have type "BlendShapeChannel"
		parseMorphTargets( relationships, deformerNodes ) {

			const rawMorphTargets = [];
			for ( let i = 0; i < relationships.children.length; i ++ ) {

				const child = relationships.children[ i ];
				const morphTargetNode = deformerNodes[ child.ID ];
				const rawMorphTarget = {
					name: morphTargetNode.attrName,
					initialWeight: morphTargetNode.DeformPercent,
					id: morphTargetNode.id,
					fullWeights: morphTargetNode.FullWeights.a
				};
				if ( morphTargetNode.attrType !== 'BlendShapeChannel' ) return;
				rawMorphTarget.geoID = connections.get( parseInt( child.ID ) ).children.filter( function ( child ) {

					return child.relationship === undefined;

				} )[ 0 ].ID;
				rawMorphTargets.push( rawMorphTarget );

			}

			return rawMorphTargets;

		}

		// create the main THREE.Group() to be returned by the loader
		parseScene( deformers, geometryMap, materialMap ) {

			sceneGraph = new THREE.Group();
			const modelMap = this.parseModels( deformers.skeletons, geometryMap, materialMap );
			const modelNodes = fbxTree.Objects.Model;
			const scope = this;
			modelMap.forEach( function ( model ) {

				const modelNode = modelNodes[ model.ID ];
				scope.setLookAtProperties( model, modelNode );
				const parentConnections = connections.get( model.ID ).parents;
				parentConnections.forEach( function ( connection ) {

					const parent = modelMap.get( connection.ID );
					if ( parent !== undefined ) parent.add( model );

				} );
				if ( model.parent === null ) {

					sceneGraph.add( model );

				}

			} );
			this.bindSkeleton( deformers.skeletons, geometryMap, modelMap );
			this.createAmbientLight();
			sceneGraph.traverse( function ( node ) {

				if ( node.userData.transformData ) {

					if ( node.parent ) {

						node.userData.transformData.parentMatrix = node.parent.matrix;
						node.userData.transformData.parentMatrixWorld = node.parent.matrixWorld;

					}

					const transform = generateTransform( node.userData.transformData );
					node.applyMatrix4( transform );
					node.updateWorldMatrix();

				}

			} );
			const animations = new AnimationParser().parse();

			// if all the models where already combined in a single group, just return that
			if ( sceneGraph.children.length === 1 && sceneGraph.children[ 0 ].isGroup ) {

				sceneGraph.children[ 0 ].animations = animations;
				sceneGraph = sceneGraph.children[ 0 ];

			}

			sceneGraph.animations = animations;

		}

		// parse nodes in FBXTree.Objects.Model
		parseModels( skeletons, geometryMap, materialMap ) {

			const modelMap = new Map();
			const modelNodes = fbxTree.Objects.Model;
			for ( const nodeID in modelNodes ) {

				const id = parseInt( nodeID );
				const node = modelNodes[ nodeID ];
				const relationships = connections.get( id );
				let model = this.buildSkeleton( relationships, skeletons, id, node.attrName );
				if ( ! model ) {

					switch ( node.attrType ) {

						case 'Camera':
							model = this.createCamera( relationships );
							break;
						case 'Light':
							model = this.createLight( relationships );
							break;
						case 'Mesh':
							model = this.createMesh( relationships, geometryMap, materialMap );
							break;
						case 'NurbsCurve':
							model = this.createCurve( relationships, geometryMap );
							break;
						case 'LimbNode':
						case 'Root':
							model = new THREE.Bone();
							break;
						case 'Null':
						default:
							model = new THREE.Group();
							break;

					}

					model.name = node.attrName ? THREE.PropertyBinding.sanitizeNodeName( node.attrName ) : '';
					model.ID = id;

				}

				this.getTransformData( model, node );
				modelMap.set( id, model );

			}

			return modelMap;

		}
		buildSkeleton( relationships, skeletons, id, name ) {

			let bone = null;
			relationships.parents.forEach( function ( parent ) {

				for ( const ID in skeletons ) {

					const skeleton = skeletons[ ID ];
					skeleton.rawBones.forEach( function ( rawBone, i ) {

						if ( rawBone.ID === parent.ID ) {

							const subBone = bone;
							bone = new THREE.Bone();
							bone.matrixWorld.copy( rawBone.transformLink );

							// set name and id here - otherwise in cases where "subBone" is created it will not have a name / id

							bone.name = name ? THREE.PropertyBinding.sanitizeNodeName( name ) : '';
							bone.ID = id;
							skeleton.bones[ i ] = bone;

							// In cases where a bone is shared between multiple meshes
							// duplicate the bone here and and it as a child of the first bone
							if ( subBone !== null ) {

								bone.add( subBone );

							}

						}

					} );

				}

			} );
			return bone;

		}

		// create a THREE.PerspectiveCamera or THREE.OrthographicCamera
		createCamera( relationships ) {

			let model;
			let cameraAttribute;
			relationships.children.forEach( function ( child ) {

				const attr = fbxTree.Objects.NodeAttribute[ child.ID ];
				if ( attr !== undefined ) {

					cameraAttribute = attr;

				}

			} );
			if ( cameraAttribute === undefined ) {

				model = new THREE.Object3D();

			} else {

				let type = 0;
				if ( cameraAttribute.CameraProjectionType !== undefined && cameraAttribute.CameraProjectionType.value === 1 ) {

					type = 1;

				}

				let nearClippingPlane = 1;
				if ( cameraAttribute.NearPlane !== undefined ) {

					nearClippingPlane = cameraAttribute.NearPlane.value / 1000;

				}

				let farClippingPlane = 1000;
				if ( cameraAttribute.FarPlane !== undefined ) {

					farClippingPlane = cameraAttribute.FarPlane.value / 1000;

				}

				let width = window.innerWidth;
				let height = window.innerHeight;
				if ( cameraAttribute.AspectWidth !== undefined && cameraAttribute.AspectHeight !== undefined ) {

					width = cameraAttribute.AspectWidth.value;
					height = cameraAttribute.AspectHeight.value;

				}

				const aspect = width / height;
				let fov = 45;
				if ( cameraAttribute.FieldOfView !== undefined ) {

					fov = cameraAttribute.FieldOfView.value;

				}

				const focalLength = cameraAttribute.FocalLength ? cameraAttribute.FocalLength.value : null;
				switch ( type ) {

					case 0:
						// Perspective
						model = new THREE.PerspectiveCamera( fov, aspect, nearClippingPlane, farClippingPlane );
						if ( focalLength !== null ) model.setFocalLength( focalLength );
						break;
					case 1:
						// Orthographic
						model = new THREE.OrthographicCamera( - width / 2, width / 2, height / 2, - height / 2, nearClippingPlane, farClippingPlane );
						break;
					default:
						console.warn( 'THREE.FBXLoader: Unknown camera type ' + type + '.' );
						model = new THREE.Object3D();
						break;

				}

			}

			return model;

		}

		// Create a THREE.DirectionalLight, THREE.PointLight or THREE.SpotLight
		createLight( relationships ) {

			let model;
			let lightAttribute;
			relationships.children.forEach( function ( child ) {

				const attr = fbxTree.Objects.NodeAttribute[ child.ID ];
				if ( attr !== undefined ) {

					lightAttribute = attr;

				}

			} );
			if ( lightAttribute === undefined ) {

				model = new THREE.Object3D();

			} else {

				let type;

				// LightType can be undefined for Point lights
				if ( lightAttribute.LightType === undefined ) {

					type = 0;

				} else {

					type = lightAttribute.LightType.value;

				}

				let color = 0xffffff;
				if ( lightAttribute.Color !== undefined ) {

					color = new THREE.Color().fromArray( lightAttribute.Color.value );

				}

				let intensity = lightAttribute.Intensity === undefined ? 1 : lightAttribute.Intensity.value / 100;

				// light disabled
				if ( lightAttribute.CastLightOnObject !== undefined && lightAttribute.CastLightOnObject.value === 0 ) {

					intensity = 0;

				}

				let distance = 0;
				if ( lightAttribute.FarAttenuationEnd !== undefined ) {

					if ( lightAttribute.EnableFarAttenuation !== undefined && lightAttribute.EnableFarAttenuation.value === 0 ) {

						distance = 0;

					} else {

						distance = lightAttribute.FarAttenuationEnd.value;

					}

				}

				// TODO: could this be calculated linearly from FarAttenuationStart to FarAttenuationEnd?
				const decay = 1;
				switch ( type ) {

					case 0:
						// Point
						model = new THREE.PointLight( color, intensity, distance, decay );
						break;
					case 1:
						// Directional
						model = new THREE.DirectionalLight( color, intensity );
						break;
					case 2:
						// Spot
						let angle = Math.PI / 3;
						if ( lightAttribute.InnerAngle !== undefined ) {

							angle = THREE.MathUtils.degToRad( lightAttribute.InnerAngle.value );

						}

						let penumbra = 0;
						if ( lightAttribute.OuterAngle !== undefined ) {

							// TODO: this is not correct - FBX calculates outer and inner angle in degrees
							// with OuterAngle > InnerAngle && OuterAngle <= Math.PI
							// while three.js uses a penumbra between (0, 1) to attenuate the inner angle
							penumbra = THREE.MathUtils.degToRad( lightAttribute.OuterAngle.value );
							penumbra = Math.max( penumbra, 1 );

						}

						model = new THREE.SpotLight( color, intensity, distance, angle, penumbra, decay );
						break;
					default:
						console.warn( 'THREE.FBXLoader: Unknown light type ' + lightAttribute.LightType.value + ', defaulting to a THREE.PointLight.' );
						model = new THREE.PointLight( color, intensity );
						break;

				}

				if ( lightAttribute.CastShadows !== undefined && lightAttribute.CastShadows.value === 1 ) {

					model.castShadow = true;

				}

			}

			return model;

		}
		createMesh( relationships, geometryMap, materialMap ) {

			let model;
			let geometry = null;
			let material = null;
			const materials = [];

			// get geometry and materials(s) from connections
			relationships.children.forEach( function ( child ) {

				if ( geometryMap.has( child.ID ) ) {

					geometry = geometryMap.get( child.ID );

				}

				if ( materialMap.has( child.ID ) ) {

					materials.push( materialMap.get( child.ID ) );

				}

			} );
			if ( materials.length > 1 ) {

				material = materials;

			} else if ( materials.length > 0 ) {

				material = materials[ 0 ];

			} else {

				material = new THREE.MeshPhongMaterial( {
					color: 0xcccccc
				} );
				materials.push( material );

			}

			if ( 'color' in geometry.attributes ) {

				materials.forEach( function ( material ) {

					material.vertexColors = true;

				} );

			}

			if ( geometry.FBX_Deformer ) {

				model = new THREE.SkinnedMesh( geometry, material );
				model.normalizeSkinWeights();

			} else {

				model = new THREE.Mesh( geometry, material );

			}

			return model;

		}
		createCurve( relationships, geometryMap ) {

			const geometry = relationships.children.reduce( function ( geo, child ) {

				if ( geometryMap.has( child.ID ) ) geo = geometryMap.get( child.ID );
				return geo;

			}, null );

			// FBX does not list materials for Nurbs lines, so we'll just put our own in here.
			const material = new THREE.LineBasicMaterial( {
				color: 0x3300ff,
				linewidth: 1
			} );
			return new THREE.Line( geometry, material );

		}

		// parse the model node for transform data
		getTransformData( model, modelNode ) {

			const transformData = {};
			if ( 'InheritType' in modelNode ) transformData.inheritType = parseInt( modelNode.InheritType.value );
			if ( 'RotationOrder' in modelNode ) transformData.eulerOrder = getEulerOrder( modelNode.RotationOrder.value ); else transformData.eulerOrder = 'ZYX';
			if ( 'Lcl_Translation' in modelNode ) transformData.translation = modelNode.Lcl_Translation.value;
			if ( 'PreRotation' in modelNode ) transformData.preRotation = modelNode.PreRotation.value;
			if ( 'Lcl_Rotation' in modelNode ) transformData.rotation = modelNode.Lcl_Rotation.value;
			if ( 'PostRotation' in modelNode ) transformData.postRotation = modelNode.PostRotation.value;
			if ( 'Lcl_Scaling' in modelNode ) transformData.scale = modelNode.Lcl_Scaling.value;
			if ( 'ScalingOffset' in modelNode ) transformData.scalingOffset = modelNode.ScalingOffset.value;
			if ( 'ScalingPivot' in modelNode ) transformData.scalingPivot = modelNode.ScalingPivot.value;
			if ( 'RotationOffset' in modelNode ) transformData.rotationOffset = modelNode.RotationOffset.value;
			if ( 'RotationPivot' in modelNode ) transformData.rotationPivot = modelNode.RotationPivot.value;
			model.userData.transformData = transformData;

		}
		setLookAtProperties( model, modelNode ) {

			if ( 'LookAtProperty' in modelNode ) {

				const children = connections.get( model.ID ).children;
				children.forEach( function ( child ) {

					if ( child.relationship === 'LookAtProperty' ) {

						const lookAtTarget = fbxTree.Objects.Model[ child.ID ];
						if ( 'Lcl_Translation' in lookAtTarget ) {

							const pos = lookAtTarget.Lcl_Translation.value;

							// THREE.DirectionalLight, THREE.SpotLight
							if ( model.target !== undefined ) {

								model.target.position.fromArray( pos );
								sceneGraph.add( model.target );

							} else {

								// Cameras and other Object3Ds

								model.lookAt( new THREE.Vector3().fromArray( pos ) );

							}

						}

					}

				} );

			}

		}
		bindSkeleton( skeletons, geometryMap, modelMap ) {

			const bindMatrices = this.parsePoseNodes();
			for ( const ID in skeletons ) {

				const skeleton = skeletons[ ID ];
				const parents = connections.get( parseInt( skeleton.ID ) ).parents;
				parents.forEach( function ( parent ) {

					if ( geometryMap.has( parent.ID ) ) {

						const geoID = parent.ID;
						const geoRelationships = connections.get( geoID );
						geoRelationships.parents.forEach( function ( geoConnParent ) {

							if ( modelMap.has( geoConnParent.ID ) ) {

								const model = modelMap.get( geoConnParent.ID );
								model.bind( new THREE.Skeleton( skeleton.bones ), bindMatrices[ geoConnParent.ID ] );

							}

						} );

					}

				} );

			}

		}
		parsePoseNodes() {

			const bindMatrices = {};
			if ( 'Pose' in fbxTree.Objects ) {

				const BindPoseNode = fbxTree.Objects.Pose;
				for ( const nodeID in BindPoseNode ) {

					if ( BindPoseNode[ nodeID ].attrType === 'BindPose' && BindPoseNode[ nodeID ].NbPoseNodes > 0 ) {

						const poseNodes = BindPoseNode[ nodeID ].PoseNode;
						if ( Array.isArray( poseNodes ) ) {

							poseNodes.forEach( function ( poseNode ) {

								bindMatrices[ poseNode.Node ] = new THREE.Matrix4().fromArray( poseNode.Matrix.a );

							} );

						} else {

							bindMatrices[ poseNodes.Node ] = new THREE.Matrix4().fromArray( poseNodes.Matrix.a );

						}

					}

				}

			}

			return bindMatrices;

		}

		// Parse ambient color in FBXTree.GlobalSettings - if it's not set to black (default), create an ambient light
		createAmbientLight() {

			if ( 'GlobalSettings' in fbxTree && 'AmbientColor' in fbxTree.GlobalSettings ) {

				const ambientColor = fbxTree.GlobalSettings.AmbientColor.value;
				const r = ambientColor[ 0 ];
				const g = ambientColor[ 1 ];
				const b = ambientColor[ 2 ];
				if ( r !== 0 || g !== 0 || b !== 0 ) {

					const color = new THREE.Color( r, g, b );
					sceneGraph.add( new THREE.AmbientLight( color, 1 ) );

				}

			}

		}

	}

	// parse Geometry data from FBXTree and return map of BufferGeometries
	class GeometryParser {

		constructor() {

			this.negativeMaterialIndices = false;

		}

		// Parse nodes in FBXTree.Objects.Geometry
		parse( deformers ) {

			const geometryMap = new Map();
			if ( 'Geometry' in fbxTree.Objects ) {

				const geoNodes = fbxTree.Objects.Geometry;
				for ( const nodeID in geoNodes ) {

					const relationships = connections.get( parseInt( nodeID ) );
					const geo = this.parseGeometry( relationships, geoNodes[ nodeID ], deformers );
					geometryMap.set( parseInt( nodeID ), geo );

				}

			}

			// report warnings

			if ( this.negativeMaterialIndices === true ) {

				console.warn( 'THREE.FBXLoader: The FBX file contains invalid (negative) material indices. The asset might not render as expected.' );

			}

			return geometryMap;

		}

		// Parse single node in FBXTree.Objects.Geometry
		parseGeometry( relationships, geoNode, deformers ) {

			switch ( geoNode.attrType ) {

				case 'Mesh':
					return this.parseMeshGeometry( relationships, geoNode, deformers );
					break;
				case 'NurbsCurve':
					return this.parseNurbsGeometry( geoNode );
					break;

			}

		}

		// Parse single node mesh geometry in FBXTree.Objects.Geometry
		parseMeshGeometry( relationships, geoNode, deformers ) {

			const skeletons = deformers.skeletons;
			const morphTargets = [];
			const modelNodes = relationships.parents.map( function ( parent ) {

				return fbxTree.Objects.Model[ parent.ID ];

			} );

			// don't create geometry if it is not associated with any models
			if ( modelNodes.length === 0 ) return;
			const skeleton = relationships.children.reduce( function ( skeleton, child ) {

				if ( skeletons[ child.ID ] !== undefined ) skeleton = skeletons[ child.ID ];
				return skeleton;

			}, null );
			relationships.children.forEach( function ( child ) {

				if ( deformers.morphTargets[ child.ID ] !== undefined ) {

					morphTargets.push( deformers.morphTargets[ child.ID ] );

				}

			} );

			// Assume one model and get the preRotation from that
			// if there is more than one model associated with the geometry this may cause problems
			const modelNode = modelNodes[ 0 ];
			const transformData = {};
			if ( 'RotationOrder' in modelNode ) transformData.eulerOrder = getEulerOrder( modelNode.RotationOrder.value );
			if ( 'InheritType' in modelNode ) transformData.inheritType = parseInt( modelNode.InheritType.value );
			if ( 'GeometricTranslation' in modelNode ) transformData.translation = modelNode.GeometricTranslation.value;
			if ( 'GeometricRotation' in modelNode ) transformData.rotation = modelNode.GeometricRotation.value;
			if ( 'GeometricScaling' in modelNode ) transformData.scale = modelNode.GeometricScaling.value;
			const transform = generateTransform( transformData );
			return this.genGeometry( geoNode, skeleton, morphTargets, transform );

		}

		// Generate a THREE.BufferGeometry from a node in FBXTree.Objects.Geometry
		genGeometry( geoNode, skeleton, morphTargets, preTransform ) {

			const geo = new THREE.BufferGeometry();
			if ( geoNode.attrName ) geo.name = geoNode.attrName;
			const geoInfo = this.parseGeoNode( geoNode, skeleton );
			const buffers = this.genBuffers( geoInfo );
			const positionAttribute = new THREE.Float32BufferAttribute( buffers.vertex, 3 );
			positionAttribute.applyMatrix4( preTransform );
			geo.setAttribute( 'position', positionAttribute );
			if ( buffers.colors.length > 0 ) {

				geo.setAttribute( 'color', new THREE.Float32BufferAttribute( buffers.colors, 3 ) );

			}

			if ( skeleton ) {

				geo.setAttribute( 'skinIndex', new THREE.Uint16BufferAttribute( buffers.weightsIndices, 4 ) );
				geo.setAttribute( 'skinWeight', new THREE.Float32BufferAttribute( buffers.vertexWeights, 4 ) );

				// used later to bind the skeleton to the model
				geo.FBX_Deformer = skeleton;

			}

			if ( buffers.normal.length > 0 ) {

				const normalMatrix = new THREE.Matrix3().getNormalMatrix( preTransform );
				const normalAttribute = new THREE.Float32BufferAttribute( buffers.normal, 3 );
				normalAttribute.applyNormalMatrix( normalMatrix );
				geo.setAttribute( 'normal', normalAttribute );

			}

			buffers.uvs.forEach( function ( uvBuffer, i ) {

				// subsequent uv buffers are called 'uv1', 'uv2', ...
				let name = 'uv' + ( i + 1 ).toString();

				// the first uv buffer is just called 'uv'
				if ( i === 0 ) {

					name = 'uv';

				}

				geo.setAttribute( name, new THREE.Float32BufferAttribute( buffers.uvs[ i ], 2 ) );

			} );
			if ( geoInfo.material && geoInfo.material.mappingType !== 'AllSame' ) {

				// Convert the material indices of each vertex into rendering groups on the geometry.
				let prevMaterialIndex = buffers.materialIndex[ 0 ];
				let startIndex = 0;
				buffers.materialIndex.forEach( function ( currentIndex, i ) {

					if ( currentIndex !== prevMaterialIndex ) {

						geo.addGroup( startIndex, i - startIndex, prevMaterialIndex );
						prevMaterialIndex = currentIndex;
						startIndex = i;

					}

				} );

				// the loop above doesn't add the last group, do that here.
				if ( geo.groups.length > 0 ) {

					const lastGroup = geo.groups[ geo.groups.length - 1 ];
					const lastIndex = lastGroup.start + lastGroup.count;
					if ( lastIndex !== buffers.materialIndex.length ) {

						geo.addGroup( lastIndex, buffers.materialIndex.length - lastIndex, prevMaterialIndex );

					}

				}

				// case where there are multiple materials but the whole geometry is only
				// using one of them
				if ( geo.groups.length === 0 ) {

					geo.addGroup( 0, buffers.materialIndex.length, buffers.materialIndex[ 0 ] );

				}

			}

			this.addMorphTargets( geo, geoNode, morphTargets, preTransform );
			return geo;

		}
		parseGeoNode( geoNode, skeleton ) {

			const geoInfo = {};
			geoInfo.vertexPositions = geoNode.Vertices !== undefined ? geoNode.Vertices.a : [];
			geoInfo.vertexIndices = geoNode.PolygonVertexIndex !== undefined ? geoNode.PolygonVertexIndex.a : [];
			if ( geoNode.LayerElementColor ) {

				geoInfo.color = this.parseVertexColors( geoNode.LayerElementColor[ 0 ] );

			}

			if ( geoNode.LayerElementMaterial ) {

				geoInfo.material = this.parseMaterialIndices( geoNode.LayerElementMaterial[ 0 ] );

			}

			if ( geoNode.LayerElementNormal ) {

				geoInfo.normal = this.parseNormals( geoNode.LayerElementNormal[ 0 ] );

			}

			if ( geoNode.LayerElementUV ) {

				geoInfo.uv = [];
				let i = 0;
				while ( geoNode.LayerElementUV[ i ] ) {

					if ( geoNode.LayerElementUV[ i ].UV ) {

						geoInfo.uv.push( this.parseUVs( geoNode.LayerElementUV[ i ] ) );

					}

					i ++;

				}

			}

			geoInfo.weightTable = {};
			if ( skeleton !== null ) {

				geoInfo.skeleton = skeleton;
				skeleton.rawBones.forEach( function ( rawBone, i ) {

					// loop over the bone's vertex indices and weights
					rawBone.indices.forEach( function ( index, j ) {

						if ( geoInfo.weightTable[ index ] === undefined ) geoInfo.weightTable[ index ] = [];
						geoInfo.weightTable[ index ].push( {
							id: i,
							weight: rawBone.weights[ j ]
						} );

					} );

				} );

			}

			return geoInfo;

		}
		genBuffers( geoInfo ) {

			const buffers = {
				vertex: [],
				normal: [],
				colors: [],
				uvs: [],
				materialIndex: [],
				vertexWeights: [],
				weightsIndices: []
			};
			let polygonIndex = 0;
			let faceLength = 0;
			let displayedWeightsWarning = false;

			// these will hold data for a single face
			let facePositionIndexes = [];
			let faceNormals = [];
			let faceColors = [];
			let faceUVs = [];
			let faceWeights = [];
			let faceWeightIndices = [];
			const scope = this;
			geoInfo.vertexIndices.forEach( function ( vertexIndex, polygonVertexIndex ) {

				let materialIndex;
				let endOfFace = false;

				// Face index and vertex index arrays are combined in a single array
				// A cube with quad faces looks like this:
				// PolygonVertexIndex: *24 {
				//  a: 0, 1, 3, -3, 2, 3, 5, -5, 4, 5, 7, -7, 6, 7, 1, -1, 1, 7, 5, -4, 6, 0, 2, -5
				//  }
				// Negative numbers mark the end of a face - first face here is 0, 1, 3, -3
				// to find index of last vertex bit shift the index: ^ - 1
				if ( vertexIndex < 0 ) {

					vertexIndex = vertexIndex ^ - 1; // equivalent to ( x * -1 ) - 1
					endOfFace = true;

				}

				let weightIndices = [];
				let weights = [];
				facePositionIndexes.push( vertexIndex * 3, vertexIndex * 3 + 1, vertexIndex * 3 + 2 );
				if ( geoInfo.color ) {

					const data = getData( polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.color );
					faceColors.push( data[ 0 ], data[ 1 ], data[ 2 ] );

				}

				if ( geoInfo.skeleton ) {

					if ( geoInfo.weightTable[ vertexIndex ] !== undefined ) {

						geoInfo.weightTable[ vertexIndex ].forEach( function ( wt ) {

							weights.push( wt.weight );
							weightIndices.push( wt.id );

						} );

					}

					if ( weights.length > 4 ) {

						if ( ! displayedWeightsWarning ) {

							console.warn( 'THREE.FBXLoader: Vertex has more than 4 skinning weights assigned to vertex. Deleting additional weights.' );
							displayedWeightsWarning = true;

						}

						const wIndex = [ 0, 0, 0, 0 ];
						const Weight = [ 0, 0, 0, 0 ];
						weights.forEach( function ( weight, weightIndex ) {

							let currentWeight = weight;
							let currentIndex = weightIndices[ weightIndex ];
							Weight.forEach( function ( comparedWeight, comparedWeightIndex, comparedWeightArray ) {

								if ( currentWeight > comparedWeight ) {

									comparedWeightArray[ comparedWeightIndex ] = currentWeight;
									currentWeight = comparedWeight;
									const tmp = wIndex[ comparedWeightIndex ];
									wIndex[ comparedWeightIndex ] = currentIndex;
									currentIndex = tmp;

								}

							} );

						} );
						weightIndices = wIndex;
						weights = Weight;

					}

					// if the weight array is shorter than 4 pad with 0s
					while ( weights.length < 4 ) {

						weights.push( 0 );
						weightIndices.push( 0 );

					}

					for ( let i = 0; i < 4; ++ i ) {

						faceWeights.push( weights[ i ] );
						faceWeightIndices.push( weightIndices[ i ] );

					}

				}

				if ( geoInfo.normal ) {

					const data = getData( polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.normal );
					faceNormals.push( data[ 0 ], data[ 1 ], data[ 2 ] );

				}

				if ( geoInfo.material && geoInfo.material.mappingType !== 'AllSame' ) {

					materialIndex = getData( polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.material )[ 0 ];
					if ( materialIndex < 0 ) {

						scope.negativeMaterialIndices = true;
						materialIndex = 0; // fallback

					}

				}

				if ( geoInfo.uv ) {

					geoInfo.uv.forEach( function ( uv, i ) {

						const data = getData( polygonVertexIndex, polygonIndex, vertexIndex, uv );
						if ( faceUVs[ i ] === undefined ) {

							faceUVs[ i ] = [];

						}

						faceUVs[ i ].push( data[ 0 ] );
						faceUVs[ i ].push( data[ 1 ] );

					} );

				}

				faceLength ++;
				if ( endOfFace ) {

					scope.genFace( buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength );
					polygonIndex ++;
					faceLength = 0;

					// reset arrays for the next face
					facePositionIndexes = [];
					faceNormals = [];
					faceColors = [];
					faceUVs = [];
					faceWeights = [];
					faceWeightIndices = [];

				}

			} );
			return buffers;

		}

		// Generate data for a single face in a geometry. If the face is a quad then split it into 2 tris
		genFace( buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength ) {

			for ( let i = 2; i < faceLength; i ++ ) {

				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ 0 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ 1 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ 2 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ ( i - 1 ) * 3 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ ( i - 1 ) * 3 + 1 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ ( i - 1 ) * 3 + 2 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ i * 3 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ i * 3 + 1 ] ] );
				buffers.vertex.push( geoInfo.vertexPositions[ facePositionIndexes[ i * 3 + 2 ] ] );
				if ( geoInfo.skeleton ) {

					buffers.vertexWeights.push( faceWeights[ 0 ] );
					buffers.vertexWeights.push( faceWeights[ 1 ] );
					buffers.vertexWeights.push( faceWeights[ 2 ] );
					buffers.vertexWeights.push( faceWeights[ 3 ] );
					buffers.vertexWeights.push( faceWeights[ ( i - 1 ) * 4 ] );
					buffers.vertexWeights.push( faceWeights[ ( i - 1 ) * 4 + 1 ] );
					buffers.vertexWeights.push( faceWeights[ ( i - 1 ) * 4 + 2 ] );
					buffers.vertexWeights.push( faceWeights[ ( i - 1 ) * 4 + 3 ] );
					buffers.vertexWeights.push( faceWeights[ i * 4 ] );
					buffers.vertexWeights.push( faceWeights[ i * 4 + 1 ] );
					buffers.vertexWeights.push( faceWeights[ i * 4 + 2 ] );
					buffers.vertexWeights.push( faceWeights[ i * 4 + 3 ] );
					buffers.weightsIndices.push( faceWeightIndices[ 0 ] );
					buffers.weightsIndices.push( faceWeightIndices[ 1 ] );
					buffers.weightsIndices.push( faceWeightIndices[ 2 ] );
					buffers.weightsIndices.push( faceWeightIndices[ 3 ] );
					buffers.weightsIndices.push( faceWeightIndices[ ( i - 1 ) * 4 ] );
					buffers.weightsIndices.push( faceWeightIndices[ ( i - 1 ) * 4 + 1 ] );
					buffers.weightsIndices.push( faceWeightIndices[ ( i - 1 ) * 4 + 2 ] );
					buffers.weightsIndices.push( faceWeightIndices[ ( i - 1 ) * 4 + 3 ] );
					buffers.weightsIndices.push( faceWeightIndices[ i * 4 ] );
					buffers.weightsIndices.push( faceWeightIndices[ i * 4 + 1 ] );
					buffers.weightsIndices.push( faceWeightIndices[ i * 4 + 2 ] );
					buffers.weightsIndices.push( faceWeightIndices[ i * 4 + 3 ] );

				}

				if ( geoInfo.color ) {

					buffers.colors.push( faceColors[ 0 ] );
					buffers.colors.push( faceColors[ 1 ] );
					buffers.colors.push( faceColors[ 2 ] );
					buffers.colors.push( faceColors[ ( i - 1 ) * 3 ] );
					buffers.colors.push( faceColors[ ( i - 1 ) * 3 + 1 ] );
					buffers.colors.push( faceColors[ ( i - 1 ) * 3 + 2 ] );
					buffers.colors.push( faceColors[ i * 3 ] );
					buffers.colors.push( faceColors[ i * 3 + 1 ] );
					buffers.colors.push( faceColors[ i * 3 + 2 ] );

				}

				if ( geoInfo.material && geoInfo.material.mappingType !== 'AllSame' ) {

					buffers.materialIndex.push( materialIndex );
					buffers.materialIndex.push( materialIndex );
					buffers.materialIndex.push( materialIndex );

				}

				if ( geoInfo.normal ) {

					buffers.normal.push( faceNormals[ 0 ] );
					buffers.normal.push( faceNormals[ 1 ] );
					buffers.normal.push( faceNormals[ 2 ] );
					buffers.normal.push( faceNormals[ ( i - 1 ) * 3 ] );
					buffers.normal.push( faceNormals[ ( i - 1 ) * 3 + 1 ] );
					buffers.normal.push( faceNormals[ ( i - 1 ) * 3 + 2 ] );
					buffers.normal.push( faceNormals[ i * 3 ] );
					buffers.normal.push( faceNormals[ i * 3 + 1 ] );
					buffers.normal.push( faceNormals[ i * 3 + 2 ] );

				}

				if ( geoInfo.uv ) {

					geoInfo.uv.forEach( function ( uv, j ) {

						if ( buffers.uvs[ j ] === undefined ) buffers.uvs[ j ] = [];
						buffers.uvs[ j ].push( faceUVs[ j ][ 0 ] );
						buffers.uvs[ j ].push( faceUVs[ j ][ 1 ] );
						buffers.uvs[ j ].push( faceUVs[ j ][ ( i - 1 ) * 2 ] );
						buffers.uvs[ j ].push( faceUVs[ j ][ ( i - 1 ) * 2 + 1 ] );
						buffers.uvs[ j ].push( faceUVs[ j ][ i * 2 ] );
						buffers.uvs[ j ].push( faceUVs[ j ][ i * 2 + 1 ] );

					} );

				}

			}

		}
		addMorphTargets( parentGeo, parentGeoNode, morphTargets, preTransform ) {

			if ( morphTargets.length === 0 ) return;
			parentGeo.morphTargetsRelative = true;
			parentGeo.morphAttributes.position = [];
			// parentGeo.morphAttributes.normal = []; // not implemented

			const scope = this;
			morphTargets.forEach( function ( morphTarget ) {

				morphTarget.rawTargets.forEach( function ( rawTarget ) {

					const morphGeoNode = fbxTree.Objects.Geometry[ rawTarget.geoID ];
					if ( morphGeoNode !== undefined ) {

						scope.genMorphGeometry( parentGeo, parentGeoNode, morphGeoNode, preTransform, rawTarget.name );

					}

				} );

			} );

		}

		// a morph geometry node is similar to a standard  node, and the node is also contained
		// in FBXTree.Objects.Geometry, however it can only have attributes for position, normal
		// and a special attribute Index defining which vertices of the original geometry are affected
		// Normal and position attributes only have data for the vertices that are affected by the morph
		genMorphGeometry( parentGeo, parentGeoNode, morphGeoNode, preTransform, name ) {

			const vertexIndices = parentGeoNode.PolygonVertexIndex !== undefined ? parentGeoNode.PolygonVertexIndex.a : [];
			const morphPositionsSparse = morphGeoNode.Vertices !== undefined ? morphGeoNode.Vertices.a : [];
			const indices = morphGeoNode.Indexes !== undefined ? morphGeoNode.Indexes.a : [];
			const length = parentGeo.attributes.position.count * 3;
			const morphPositions = new Float32Array( length );
			for ( let i = 0; i < indices.length; i ++ ) {

				const morphIndex = indices[ i ] * 3;
				morphPositions[ morphIndex ] = morphPositionsSparse[ i * 3 ];
				morphPositions[ morphIndex + 1 ] = morphPositionsSparse[ i * 3 + 1 ];
				morphPositions[ morphIndex + 2 ] = morphPositionsSparse[ i * 3 + 2 ];

			}

			// TODO: add morph normal support
			const morphGeoInfo = {
				vertexIndices: vertexIndices,
				vertexPositions: morphPositions
			};
			const morphBuffers = this.genBuffers( morphGeoInfo );
			const positionAttribute = new THREE.Float32BufferAttribute( morphBuffers.vertex, 3 );
			positionAttribute.name = name || morphGeoNode.attrName;
			positionAttribute.applyMatrix4( preTransform );
			parentGeo.morphAttributes.position.push( positionAttribute );

		}

		// Parse normal from FBXTree.Objects.Geometry.LayerElementNormal if it exists
		parseNormals( NormalNode ) {

			const mappingType = NormalNode.MappingInformationType;
			const referenceType = NormalNode.ReferenceInformationType;
			const buffer = NormalNode.Normals.a;
			let indexBuffer = [];
			if ( referenceType === 'IndexToDirect' ) {

				if ( 'NormalIndex' in NormalNode ) {

					indexBuffer = NormalNode.NormalIndex.a;

				} else if ( 'NormalsIndex' in NormalNode ) {

					indexBuffer = NormalNode.NormalsIndex.a;

				}

			}

			return {
				dataSize: 3,
				buffer: buffer,
				indices: indexBuffer,
				mappingType: mappingType,
				referenceType: referenceType
			};

		}

		// Parse UVs from FBXTree.Objects.Geometry.LayerElementUV if it exists
		parseUVs( UVNode ) {

			const mappingType = UVNode.MappingInformationType;
			const referenceType = UVNode.ReferenceInformationType;
			const buffer = UVNode.UV.a;
			let indexBuffer = [];
			if ( referenceType === 'IndexToDirect' ) {

				indexBuffer = UVNode.UVIndex.a;

			}

			return {
				dataSize: 2,
				buffer: buffer,
				indices: indexBuffer,
				mappingType: mappingType,
				referenceType: referenceType
			};

		}

		// Parse Vertex Colors from FBXTree.Objects.Geometry.LayerElementColor if it exists
		parseVertexColors( ColorNode ) {

			const mappingType = ColorNode.MappingInformationType;
			const referenceType = ColorNode.ReferenceInformationType;
			const buffer = ColorNode.Colors.a;
			let indexBuffer = [];
			if ( referenceType === 'IndexToDirect' ) {

				indexBuffer = ColorNode.ColorIndex.a;

			}

			return {
				dataSize: 4,
				buffer: buffer,
				indices: indexBuffer,
				mappingType: mappingType,
				referenceType: referenceType
			};

		}

		// Parse mapping and material data in FBXTree.Objects.Geometry.LayerElementMaterial if it exists
		parseMaterialIndices( MaterialNode ) {

			const mappingType = MaterialNode.MappingInformationType;
			const referenceType = MaterialNode.ReferenceInformationType;
			if ( mappingType === 'NoMappingInformation' ) {

				return {
					dataSize: 1,
					buffer: [ 0 ],
					indices: [ 0 ],
					mappingType: 'AllSame',
					referenceType: referenceType
				};

			}

			const materialIndexBuffer = MaterialNode.Materials.a;

			// Since materials are stored as indices, there's a bit of a mismatch between FBX and what
			// we expect.So we create an intermediate buffer that points to the index in the buffer,
			// for conforming with the other functions we've written for other data.
			const materialIndices = [];
			for ( let i = 0; i < materialIndexBuffer.length; ++ i ) {

				materialIndices.push( i );

			}

			return {
				dataSize: 1,
				buffer: materialIndexBuffer,
				indices: materialIndices,
				mappingType: mappingType,
				referenceType: referenceType
			};

		}

		// Generate a NurbGeometry from a node in FBXTree.Objects.Geometry
		parseNurbsGeometry( geoNode ) {

			if ( THREE.NURBSCurve === undefined ) {

				console.error( 'THREE.FBXLoader: The loader relies on THREE.NURBSCurve for any nurbs present in the model. Nurbs will show up as empty geometry.' );
				return new THREE.BufferGeometry();

			}

			const order = parseInt( geoNode.Order );
			if ( isNaN( order ) ) {

				console.error( 'THREE.FBXLoader: Invalid Order %s given for geometry ID: %s', geoNode.Order, geoNode.id );
				return new THREE.BufferGeometry();

			}

			const degree = order - 1;
			const knots = geoNode.KnotVector.a;
			const controlPoints = [];
			const pointsValues = geoNode.Points.a;
			for ( let i = 0, l = pointsValues.length; i < l; i += 4 ) {

				controlPoints.push( new THREE.Vector4().fromArray( pointsValues, i ) );

			}

			let startKnot, endKnot;
			if ( geoNode.Form === 'Closed' ) {

				controlPoints.push( controlPoints[ 0 ] );

			} else if ( geoNode.Form === 'Periodic' ) {

				startKnot = degree;
				endKnot = knots.length - 1 - startKnot;
				for ( let i = 0; i < degree; ++ i ) {

					controlPoints.push( controlPoints[ i ] );

				}

			}

			const curve = new THREE.NURBSCurve( degree, knots, controlPoints, startKnot, endKnot );
			const points = curve.getPoints( controlPoints.length * 12 );
			return new THREE.BufferGeometry().setFromPoints( points );

		}

	}

	// parse animation data from FBXTree
	class AnimationParser {

		// take raw animation clips and turn them into three.js animation clips
		parse() {

			const animationClips = [];
			const rawClips = this.parseClips();
			if ( rawClips !== undefined ) {

				for ( const key in rawClips ) {

					const rawClip = rawClips[ key ];
					const clip = this.addClip( rawClip );
					animationClips.push( clip );

				}

			}

			return animationClips;

		}
		parseClips() {

			// since the actual transformation data is stored in FBXTree.Objects.AnimationCurve,
			// if this is undefined we can safely assume there are no animations
			if ( fbxTree.Objects.AnimationCurve === undefined ) return undefined;
			const curveNodesMap = this.parseAnimationCurveNodes();
			this.parseAnimationCurves( curveNodesMap );
			const layersMap = this.parseAnimationLayers( curveNodesMap );
			const rawClips = this.parseAnimStacks( layersMap );
			return rawClips;

		}

		// parse nodes in FBXTree.Objects.AnimationCurveNode
		// each AnimationCurveNode holds data for an animation transform for a model (e.g. left arm rotation )
		// and is referenced by an AnimationLayer
		parseAnimationCurveNodes() {

			const rawCurveNodes = fbxTree.Objects.AnimationCurveNode;
			const curveNodesMap = new Map();
			for ( const nodeID in rawCurveNodes ) {

				const rawCurveNode = rawCurveNodes[ nodeID ];
				if ( rawCurveNode.attrName.match( /S|R|T|DeformPercent/ ) !== null ) {

					const curveNode = {
						id: rawCurveNode.id,
						attr: rawCurveNode.attrName,
						curves: {}
					};
					curveNodesMap.set( curveNode.id, curveNode );

				}

			}

			return curveNodesMap;

		}

		// parse nodes in FBXTree.Objects.AnimationCurve and connect them up to
		// previously parsed AnimationCurveNodes. Each AnimationCurve holds data for a single animated
		// axis ( e.g. times and values of x rotation)
		parseAnimationCurves( curveNodesMap ) {

			const rawCurves = fbxTree.Objects.AnimationCurve;

			// TODO: Many values are identical up to roundoff error, but won't be optimised
			// e.g. position times: [0, 0.4, 0. 8]
			// position values: [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.235384487103147e-7, 93.67520904541016, -0.9982695579528809]
			// clearly, this should be optimised to
			// times: [0], positions [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809]
			// this shows up in nearly every FBX file, and generally time array is length > 100

			for ( const nodeID in rawCurves ) {

				const animationCurve = {
					id: rawCurves[ nodeID ].id,
					times: rawCurves[ nodeID ].KeyTime.a.map( convertFBXTimeToSeconds ),
					values: rawCurves[ nodeID ].KeyValueFloat.a
				};
				const relationships = connections.get( animationCurve.id );
				if ( relationships !== undefined ) {

					const animationCurveID = relationships.parents[ 0 ].ID;
					const animationCurveRelationship = relationships.parents[ 0 ].relationship;
					if ( animationCurveRelationship.match( /X/ ) ) {

						curveNodesMap.get( animationCurveID ).curves[ 'x' ] = animationCurve;

					} else if ( animationCurveRelationship.match( /Y/ ) ) {

						curveNodesMap.get( animationCurveID ).curves[ 'y' ] = animationCurve;

					} else if ( animationCurveRelationship.match( /Z/ ) ) {

						curveNodesMap.get( animationCurveID ).curves[ 'z' ] = animationCurve;

					} else if ( animationCurveRelationship.match( /d|DeformPercent/ ) && curveNodesMap.has( animationCurveID ) ) {

						curveNodesMap.get( animationCurveID ).curves[ 'morph' ] = animationCurve;

					}

				}

			}

		}

		// parse nodes in FBXTree.Objects.AnimationLayer. Each layers holds references
		// to various AnimationCurveNodes and is referenced by an AnimationStack node
		// note: theoretically a stack can have multiple layers, however in practice there always seems to be one per stack
		parseAnimationLayers( curveNodesMap ) {

			const rawLayers = fbxTree.Objects.AnimationLayer;
			const layersMap = new Map();
			for ( const nodeID in rawLayers ) {

				const layerCurveNodes = [];
				const connection = connections.get( parseInt( nodeID ) );
				if ( connection !== undefined ) {

					// all the animationCurveNodes used in the layer
					const children = connection.children;
					children.forEach( function ( child, i ) {

						if ( curveNodesMap.has( child.ID ) ) {

							const curveNode = curveNodesMap.get( child.ID );

							// check that the curves are defined for at least one axis, otherwise ignore the curveNode
							if ( curveNode.curves.x !== undefined || curveNode.curves.y !== undefined || curveNode.curves.z !== undefined ) {

								if ( layerCurveNodes[ i ] === undefined ) {

									const modelID = connections.get( child.ID ).parents.filter( function ( parent ) {

										return parent.relationship !== undefined;

									} )[ 0 ].ID;
									if ( modelID !== undefined ) {

										const rawModel = fbxTree.Objects.Model[ modelID.toString() ];
										if ( rawModel === undefined ) {

											console.warn( 'THREE.FBXLoader: Encountered a unused curve.', child );
											return;

										}

										const node = {
											modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName( rawModel.attrName ) : '',
											ID: rawModel.id,
											initialPosition: [ 0, 0, 0 ],
											initialRotation: [ 0, 0, 0 ],
											initialScale: [ 1, 1, 1 ]
										};
										sceneGraph.traverse( function ( child ) {

											if ( child.ID === rawModel.id ) {

												node.transform = child.matrix;
												if ( child.userData.transformData ) node.eulerOrder = child.userData.transformData.eulerOrder;

											}

										} );
										if ( ! node.transform ) node.transform = new THREE.Matrix4();

										// if the animated model is pre rotated, we'll have to apply the pre rotations to every
										// animation value as well
										if ( 'PreRotation' in rawModel ) node.preRotation = rawModel.PreRotation.value;
										if ( 'PostRotation' in rawModel ) node.postRotation = rawModel.PostRotation.value;
										layerCurveNodes[ i ] = node;

									}

								}

								if ( layerCurveNodes[ i ] ) layerCurveNodes[ i ][ curveNode.attr ] = curveNode;

							} else if ( curveNode.curves.morph !== undefined ) {

								if ( layerCurveNodes[ i ] === undefined ) {

									const deformerID = connections.get( child.ID ).parents.filter( function ( parent ) {

										return parent.relationship !== undefined;

									} )[ 0 ].ID;
									const morpherID = connections.get( deformerID ).parents[ 0 ].ID;
									const geoID = connections.get( morpherID ).parents[ 0 ].ID;

									// assuming geometry is not used in more than one model
									const modelID = connections.get( geoID ).parents[ 0 ].ID;
									const rawModel = fbxTree.Objects.Model[ modelID ];
									const node = {
										modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName( rawModel.attrName ) : '',
										morphName: fbxTree.Objects.Deformer[ deformerID ].attrName
									};
									layerCurveNodes[ i ] = node;

								}

								layerCurveNodes[ i ][ curveNode.attr ] = curveNode;

							}

						}

					} );
					layersMap.set( parseInt( nodeID ), layerCurveNodes );

				}

			}

			return layersMap;

		}

		// parse nodes in FBXTree.Objects.AnimationStack. These are the top level node in the animation
		// hierarchy. Each Stack node will be used to create a THREE.AnimationClip
		parseAnimStacks( layersMap ) {

			const rawStacks = fbxTree.Objects.AnimationStack;

			// connect the stacks (clips) up to the layers
			const rawClips = {};
			for ( const nodeID in rawStacks ) {

				const children = connections.get( parseInt( nodeID ) ).children;
				if ( children.length > 1 ) {

					// it seems like stacks will always be associated with a single layer. But just in case there are files
					// where there are multiple layers per stack, we'll display a warning
					console.warn( 'THREE.FBXLoader: Encountered an animation stack with multiple layers, this is currently not supported. Ignoring subsequent layers.' );

				}

				const layer = layersMap.get( children[ 0 ].ID );
				rawClips[ nodeID ] = {
					name: rawStacks[ nodeID ].attrName,
					layer: layer
				};

			}

			return rawClips;

		}
		addClip( rawClip ) {

			let tracks = [];
			const scope = this;
			rawClip.layer.forEach( function ( rawTracks ) {

				tracks = tracks.concat( scope.generateTracks( rawTracks ) );

			} );
			return new THREE.AnimationClip( rawClip.name, - 1, tracks );

		}
		generateTracks( rawTracks ) {

			const tracks = [];
			let initialPosition = new THREE.Vector3();
			let initialRotation = new THREE.Quaternion();
			let initialScale = new THREE.Vector3();
			if ( rawTracks.transform ) rawTracks.transform.decompose( initialPosition, initialRotation, initialScale );
			initialPosition = initialPosition.toArray();
			initialRotation = new THREE.Euler().setFromQuaternion( initialRotation, rawTracks.eulerOrder ).toArray();
			initialScale = initialScale.toArray();
			if ( rawTracks.T !== undefined && Object.keys( rawTracks.T.curves ).length > 0 ) {

				const positionTrack = this.generateVectorTrack( rawTracks.modelName, rawTracks.T.curves, initialPosition, 'position' );
				if ( positionTrack !== undefined ) tracks.push( positionTrack );

			}

			if ( rawTracks.R !== undefined && Object.keys( rawTracks.R.curves ).length > 0 ) {

				const rotationTrack = this.generateRotationTrack( rawTracks.modelName, rawTracks.R.curves, initialRotation, rawTracks.preRotation, rawTracks.postRotation, rawTracks.eulerOrder );
				if ( rotationTrack !== undefined ) tracks.push( rotationTrack );

			}

			if ( rawTracks.S !== undefined && Object.keys( rawTracks.S.curves ).length > 0 ) {

				const scaleTrack = this.generateVectorTrack( rawTracks.modelName, rawTracks.S.curves, initialScale, 'scale' );
				if ( scaleTrack !== undefined ) tracks.push( scaleTrack );

			}

			if ( rawTracks.DeformPercent !== undefined ) {

				const morphTrack = this.generateMorphTrack( rawTracks );
				if ( morphTrack !== undefined ) tracks.push( morphTrack );

			}

			return tracks;

		}
		generateVectorTrack( modelName, curves, initialValue, type ) {

			const times = this.getTimesForAllAxes( curves );
			const values = this.getKeyframeTrackValues( times, curves, initialValue );
			return new THREE.VectorKeyframeTrack( modelName + '.' + type, times, values );

		}
		generateRotationTrack( modelName, curves, initialValue, preRotation, postRotation, eulerOrder ) {

			if ( curves.x !== undefined ) {

				this.interpolateRotations( curves.x );
				curves.x.values = curves.x.values.map( THREE.MathUtils.degToRad );

			}

			if ( curves.y !== undefined ) {

				this.interpolateRotations( curves.y );
				curves.y.values = curves.y.values.map( THREE.MathUtils.degToRad );

			}

			if ( curves.z !== undefined ) {

				this.interpolateRotations( curves.z );
				curves.z.values = curves.z.values.map( THREE.MathUtils.degToRad );

			}

			const times = this.getTimesForAllAxes( curves );
			const values = this.getKeyframeTrackValues( times, curves, initialValue );
			if ( preRotation !== undefined ) {

				preRotation = preRotation.map( THREE.MathUtils.degToRad );
				preRotation.push( eulerOrder );
				preRotation = new THREE.Euler().fromArray( preRotation );
				preRotation = new THREE.Quaternion().setFromEuler( preRotation );

			}

			if ( postRotation !== undefined ) {

				postRotation = postRotation.map( THREE.MathUtils.degToRad );
				postRotation.push( eulerOrder );
				postRotation = new THREE.Euler().fromArray( postRotation );
				postRotation = new THREE.Quaternion().setFromEuler( postRotation ).invert();

			}

			const quaternion = new THREE.Quaternion();
			const euler = new THREE.Euler();
			const quaternionValues = [];
			for ( let i = 0; i < values.length; i += 3 ) {

				euler.set( values[ i ], values[ i + 1 ], values[ i + 2 ], eulerOrder );
				quaternion.setFromEuler( euler );
				if ( preRotation !== undefined ) quaternion.premultiply( preRotation );
				if ( postRotation !== undefined ) quaternion.multiply( postRotation );
				quaternion.toArray( quaternionValues, i / 3 * 4 );

			}

			return new THREE.QuaternionKeyframeTrack( modelName + '.quaternion', times, quaternionValues );

		}
		generateMorphTrack( rawTracks ) {

			const curves = rawTracks.DeformPercent.curves.morph;
			const values = curves.values.map( function ( val ) {

				return val / 100;

			} );
			const morphNum = sceneGraph.getObjectByName( rawTracks.modelName ).morphTargetDictionary[ rawTracks.morphName ];
			return new THREE.NumberKeyframeTrack( rawTracks.modelName + '.morphTargetInfluences[' + morphNum + ']', curves.times, values );

		}

		// For all animated objects, times are defined separately for each axis
		// Here we'll combine the times into one sorted array without duplicates
		getTimesForAllAxes( curves ) {

			let times = [];

			// first join together the times for each axis, if defined
			if ( curves.x !== undefined ) times = times.concat( curves.x.times );
			if ( curves.y !== undefined ) times = times.concat( curves.y.times );
			if ( curves.z !== undefined ) times = times.concat( curves.z.times );

			// then sort them
			times = times.sort( function ( a, b ) {

				return a - b;

			} );

			// and remove duplicates
			if ( times.length > 1 ) {

				let targetIndex = 1;
				let lastValue = times[ 0 ];
				for ( let i = 1; i < times.length; i ++ ) {

					const currentValue = times[ i ];
					if ( currentValue !== lastValue ) {

						times[ targetIndex ] = currentValue;
						lastValue = currentValue;
						targetIndex ++;

					}

				}

				times = times.slice( 0, targetIndex );

			}

			return times;

		}
		getKeyframeTrackValues( times, curves, initialValue ) {

			const prevValue = initialValue;
			const values = [];
			let xIndex = - 1;
			let yIndex = - 1;
			let zIndex = - 1;
			times.forEach( function ( time ) {

				if ( curves.x ) xIndex = curves.x.times.indexOf( time );
				if ( curves.y ) yIndex = curves.y.times.indexOf( time );
				if ( curves.z ) zIndex = curves.z.times.indexOf( time );

				// if there is an x value defined for this frame, use that
				if ( xIndex !== - 1 ) {

					const xValue = curves.x.values[ xIndex ];
					values.push( xValue );
					prevValue[ 0 ] = xValue;

				} else {

					// otherwise use the x value from the previous frame
					values.push( prevValue[ 0 ] );

				}

				if ( yIndex !== - 1 ) {

					const yValue = curves.y.values[ yIndex ];
					values.push( yValue );
					prevValue[ 1 ] = yValue;

				} else {

					values.push( prevValue[ 1 ] );

				}

				if ( zIndex !== - 1 ) {

					const zValue = curves.z.values[ zIndex ];
					values.push( zValue );
					prevValue[ 2 ] = zValue;

				} else {

					values.push( prevValue[ 2 ] );

				}

			} );
			return values;

		}

		// Rotations are defined as THREE.Euler angles which can have values  of any size
		// These will be converted to quaternions which don't support values greater than
		// PI, so we'll interpolate large rotations
		interpolateRotations( curve ) {

			for ( let i = 1; i < curve.values.length; i ++ ) {

				const initialValue = curve.values[ i - 1 ];
				const valuesSpan = curve.values[ i ] - initialValue;
				const absoluteSpan = Math.abs( valuesSpan );
				if ( absoluteSpan >= 180 ) {

					const numSubIntervals = absoluteSpan / 180;
					const step = valuesSpan / numSubIntervals;
					let nextValue = initialValue + step;
					const initialTime = curve.times[ i - 1 ];
					const timeSpan = curve.times[ i ] - initialTime;
					const interval = timeSpan / numSubIntervals;
					let nextTime = initialTime + interval;
					const interpolatedTimes = [];
					const interpolatedValues = [];
					while ( nextTime < curve.times[ i ] ) {

						interpolatedTimes.push( nextTime );
						nextTime += interval;
						interpolatedValues.push( nextValue );
						nextValue += step;

					}

					curve.times = inject( curve.times, i, interpolatedTimes );
					curve.values = inject( curve.values, i, interpolatedValues );

				}

			}

		}

	}

	// parse an FBX file in ASCII format
	class TextParser {

		getPrevNode() {

			return this.nodeStack[ this.currentIndent - 2 ];

		}
		getCurrentNode() {

			return this.nodeStack[ this.currentIndent - 1 ];

		}
		getCurrentProp() {

			return this.currentProp;

		}
		pushStack( node ) {

			this.nodeStack.push( node );
			this.currentIndent += 1;

		}
		popStack() {

			this.nodeStack.pop();
			this.currentIndent -= 1;

		}
		setCurrentProp( val, name ) {

			this.currentProp = val;
			this.currentPropName = name;

		}
		parse( text ) {

			this.currentIndent = 0;
			this.allNodes = new FBXTree();
			this.nodeStack = [];
			this.currentProp = [];
			this.currentPropName = '';
			const scope = this;
			const split = text.split( /[\r\n]+/ );
			split.forEach( function ( line, i ) {

				const matchComment = line.match( /^[\s\t]*;/ );
				const matchEmpty = line.match( /^[\s\t]*$/ );
				if ( matchComment || matchEmpty ) return;
				const matchBeginning = line.match( '^\\t{' + scope.currentIndent + '}(\\w+):(.*){', '' );
				const matchProperty = line.match( '^\\t{' + scope.currentIndent + '}(\\w+):[\\s\\t\\r\\n](.*)' );
				const matchEnd = line.match( '^\\t{' + ( scope.currentIndent - 1 ) + '}}' );
				if ( matchBeginning ) {

					scope.parseNodeBegin( line, matchBeginning );

				} else if ( matchProperty ) {

					scope.parseNodeProperty( line, matchProperty, split[ ++ i ] );

				} else if ( matchEnd ) {

					scope.popStack();

				} else if ( line.match( /^[^\s\t}]/ ) ) {

					// large arrays are split over multiple lines terminated with a ',' character
					// if this is encountered the line needs to be joined to the previous line
					scope.parseNodePropertyContinued( line );

				}

			} );
			return this.allNodes;

		}
		parseNodeBegin( line, property ) {

			const nodeName = property[ 1 ].trim().replace( /^"/, '' ).replace( /"$/, '' );
			const nodeAttrs = property[ 2 ].split( ',' ).map( function ( attr ) {

				return attr.trim().replace( /^"/, '' ).replace( /"$/, '' );

			} );
			const node = {
				name: nodeName
			};
			const attrs = this.parseNodeAttr( nodeAttrs );
			const currentNode = this.getCurrentNode();

			// a top node
			if ( this.currentIndent === 0 ) {

				this.allNodes.add( nodeName, node );

			} else {

				// a subnode

				// if the subnode already exists, append it
				if ( nodeName in currentNode ) {

					// special case Pose needs PoseNodes as an array
					if ( nodeName === 'PoseNode' ) {

						currentNode.PoseNode.push( node );

					} else if ( currentNode[ nodeName ].id !== undefined ) {

						currentNode[ nodeName ] = {};
						currentNode[ nodeName ][ currentNode[ nodeName ].id ] = currentNode[ nodeName ];

					}

					if ( attrs.id !== '' ) currentNode[ nodeName ][ attrs.id ] = node;

				} else if ( typeof attrs.id === 'number' ) {

					currentNode[ nodeName ] = {};
					currentNode[ nodeName ][ attrs.id ] = node;

				} else if ( nodeName !== 'Properties70' ) {

					if ( nodeName === 'PoseNode' ) currentNode[ nodeName ] = [ node ]; else currentNode[ nodeName ] = node;

				}

			}

			if ( typeof attrs.id === 'number' ) node.id = attrs.id;
			if ( attrs.name !== '' ) node.attrName = attrs.name;
			if ( attrs.type !== '' ) node.attrType = attrs.type;
			this.pushStack( node );

		}
		parseNodeAttr( attrs ) {

			let id = attrs[ 0 ];
			if ( attrs[ 0 ] !== '' ) {

				id = parseInt( attrs[ 0 ] );
				if ( isNaN( id ) ) {

					id = attrs[ 0 ];

				}

			}

			let name = '',
				type = '';
			if ( attrs.length > 1 ) {

				name = attrs[ 1 ].replace( /^(\w+)::/, '' );
				type = attrs[ 2 ];

			}

			return {
				id: id,
				name: name,
				type: type
			};

		}
		parseNodeProperty( line, property, contentLine ) {

			let propName = property[ 1 ].replace( /^"/, '' ).replace( /"$/, '' ).trim();
			let propValue = property[ 2 ].replace( /^"/, '' ).replace( /"$/, '' ).trim();

			// for special case: base64 image data follows "Content: ," line
			//	Content: ,
			//	 "/9j/4RDaRXhpZgAATU0A..."
			if ( propName === 'Content' && propValue === ',' ) {

				propValue = contentLine.replace( /"/g, '' ).replace( /,$/, '' ).trim();

			}

			const currentNode = this.getCurrentNode();
			const parentName = currentNode.name;
			if ( parentName === 'Properties70' ) {

				this.parseNodeSpecialProperty( line, propName, propValue );
				return;

			}

			// Connections
			if ( propName === 'C' ) {

				const connProps = propValue.split( ',' ).slice( 1 );
				const from = parseInt( connProps[ 0 ] );
				const to = parseInt( connProps[ 1 ] );
				let rest = propValue.split( ',' ).slice( 3 );
				rest = rest.map( function ( elem ) {

					return elem.trim().replace( /^"/, '' );

				} );
				propName = 'connections';
				propValue = [ from, to ];
				append( propValue, rest );
				if ( currentNode[ propName ] === undefined ) {

					currentNode[ propName ] = [];

				}

			}

			// Node
			if ( propName === 'Node' ) currentNode.id = propValue;

			// connections
			if ( propName in currentNode && Array.isArray( currentNode[ propName ] ) ) {

				currentNode[ propName ].push( propValue );

			} else {

				if ( propName !== 'a' ) currentNode[ propName ] = propValue; else currentNode.a = propValue;

			}

			this.setCurrentProp( currentNode, propName );

			// convert string to array, unless it ends in ',' in which case more will be added to it
			if ( propName === 'a' && propValue.slice( - 1 ) !== ',' ) {

				currentNode.a = parseNumberArray( propValue );

			}

		}
		parseNodePropertyContinued( line ) {

			const currentNode = this.getCurrentNode();
			currentNode.a += line;

			// if the line doesn't end in ',' we have reached the end of the property value
			// so convert the string to an array
			if ( line.slice( - 1 ) !== ',' ) {

				currentNode.a = parseNumberArray( currentNode.a );

			}

		}

		// parse "Property70"
		parseNodeSpecialProperty( line, propName, propValue ) {

			// split this
			// P: "Lcl Scaling", "Lcl Scaling", "", "A",1,1,1
			// into array like below
			// ["Lcl Scaling", "Lcl Scaling", "", "A", "1,1,1" ]
			const props = propValue.split( '",' ).map( function ( prop ) {

				return prop.trim().replace( /^\"/, '' ).replace( /\s/, '_' );

			} );
			const innerPropName = props[ 0 ];
			const innerPropType1 = props[ 1 ];
			const innerPropType2 = props[ 2 ];
			const innerPropFlag = props[ 3 ];
			let innerPropValue = props[ 4 ];

			// cast values where needed, otherwise leave as strings
			switch ( innerPropType1 ) {

				case 'int':
				case 'enum':
				case 'bool':
				case 'ULongLong':
				case 'double':
				case 'Number':
				case 'FieldOfView':
					innerPropValue = parseFloat( innerPropValue );
					break;
				case 'Color':
				case 'ColorRGB':
				case 'Vector3D':
				case 'Lcl_Translation':
				case 'Lcl_Rotation':
				case 'Lcl_Scaling':
					innerPropValue = parseNumberArray( innerPropValue );
					break;

			}

			// CAUTION: these props must append to parent's parent
			this.getPrevNode()[ innerPropName ] = {
				'type': innerPropType1,
				'type2': innerPropType2,
				'flag': innerPropFlag,
				'value': innerPropValue
			};
			this.setCurrentProp( this.getPrevNode(), innerPropName );

		}

	}

	// Parse an FBX file in Binary format
	class BinaryParser {

		parse( buffer ) {

			const reader = new BinaryReader( buffer );
			reader.skip( 23 ); // skip magic 23 bytes

			const version = reader.getUint32();
			if ( version < 6400 ) {

				throw new Error( 'THREE.FBXLoader: FBX version not supported, FileVersion: ' + version );

			}

			const allNodes = new FBXTree();
			while ( ! this.endOfContent( reader ) ) {

				const node = this.parseNode( reader, version );
				if ( node !== null ) allNodes.add( node.name, node );

			}

			return allNodes;

		}

		// Check if reader has reached the end of content.
		endOfContent( reader ) {

			// footer size: 160bytes + 16-byte alignment padding
			// - 16bytes: magic
			// - padding til 16-byte alignment (at least 1byte?)
			//	(seems like some exporters embed fixed 15 or 16bytes?)
			// - 4bytes: magic
			// - 4bytes: version
			// - 120bytes: zero
			// - 16bytes: magic
			if ( reader.size() % 16 === 0 ) {

				return ( reader.getOffset() + 160 + 16 & ~ 0xf ) >= reader.size();

			} else {

				return reader.getOffset() + 160 + 16 >= reader.size();

			}

		}

		// recursively parse nodes until the end of the file is reached
		parseNode( reader, version ) {

			const node = {};

			// The first three data sizes depends on version.
			const endOffset = version >= 7500 ? reader.getUint64() : reader.getUint32();
			const numProperties = version >= 7500 ? reader.getUint64() : reader.getUint32();
			version >= 7500 ? reader.getUint64() : reader.getUint32(); // the returned propertyListLen is not used

			const nameLen = reader.getUint8();
			const name = reader.getString( nameLen );

			// Regards this node as NULL-record if endOffset is zero
			if ( endOffset === 0 ) return null;
			const propertyList = [];
			for ( let i = 0; i < numProperties; i ++ ) {

				propertyList.push( this.parseProperty( reader ) );

			}

			// Regards the first three elements in propertyList as id, attrName, and attrType
			const id = propertyList.length > 0 ? propertyList[ 0 ] : '';
			const attrName = propertyList.length > 1 ? propertyList[ 1 ] : '';
			const attrType = propertyList.length > 2 ? propertyList[ 2 ] : '';

			// check if this node represents just a single property
			// like (name, 0) set or (name2, [0, 1, 2]) set of {name: 0, name2: [0, 1, 2]}
			node.singleProperty = numProperties === 1 && reader.getOffset() === endOffset ? true : false;
			while ( endOffset > reader.getOffset() ) {

				const subNode = this.parseNode( reader, version );
				if ( subNode !== null ) this.parseSubNode( name, node, subNode );

			}

			node.propertyList = propertyList; // raw property list used by parent

			if ( typeof id === 'number' ) node.id = id;
			if ( attrName !== '' ) node.attrName = attrName;
			if ( attrType !== '' ) node.attrType = attrType;
			if ( name !== '' ) node.name = name;
			return node;

		}
		parseSubNode( name, node, subNode ) {

			// special case: child node is single property
			if ( subNode.singleProperty === true ) {

				const value = subNode.propertyList[ 0 ];
				if ( Array.isArray( value ) ) {

					node[ subNode.name ] = subNode;
					subNode.a = value;

				} else {

					node[ subNode.name ] = value;

				}

			} else if ( name === 'Connections' && subNode.name === 'C' ) {

				const array = [];
				subNode.propertyList.forEach( function ( property, i ) {

					// first Connection is FBX type (OO, OP, etc.). We'll discard these
					if ( i !== 0 ) array.push( property );

				} );
				if ( node.connections === undefined ) {

					node.connections = [];

				}

				node.connections.push( array );

			} else if ( subNode.name === 'Properties70' ) {

				const keys = Object.keys( subNode );
				keys.forEach( function ( key ) {

					node[ key ] = subNode[ key ];

				} );

			} else if ( name === 'Properties70' && subNode.name === 'P' ) {

				let innerPropName = subNode.propertyList[ 0 ];
				let innerPropType1 = subNode.propertyList[ 1 ];
				const innerPropType2 = subNode.propertyList[ 2 ];
				const innerPropFlag = subNode.propertyList[ 3 ];
				let innerPropValue;
				if ( innerPropName.indexOf( 'Lcl ' ) === 0 ) innerPropName = innerPropName.replace( 'Lcl ', 'Lcl_' );
				if ( innerPropType1.indexOf( 'Lcl ' ) === 0 ) innerPropType1 = innerPropType1.replace( 'Lcl ', 'Lcl_' );
				if ( innerPropType1 === 'Color' || innerPropType1 === 'ColorRGB' || innerPropType1 === 'Vector' || innerPropType1 === 'Vector3D' || innerPropType1.indexOf( 'Lcl_' ) === 0 ) {

					innerPropValue = [ subNode.propertyList[ 4 ], subNode.propertyList[ 5 ], subNode.propertyList[ 6 ] ];

				} else {

					innerPropValue = subNode.propertyList[ 4 ];

				}

				// this will be copied to parent, see above
				node[ innerPropName ] = {
					'type': innerPropType1,
					'type2': innerPropType2,
					'flag': innerPropFlag,
					'value': innerPropValue
				};

			} else if ( node[ subNode.name ] === undefined ) {

				if ( typeof subNode.id === 'number' ) {

					node[ subNode.name ] = {};
					node[ subNode.name ][ subNode.id ] = subNode;

				} else {

					node[ subNode.name ] = subNode;

				}

			} else {

				if ( subNode.name === 'PoseNode' ) {

					if ( ! Array.isArray( node[ subNode.name ] ) ) {

						node[ subNode.name ] = [ node[ subNode.name ] ];

					}

					node[ subNode.name ].push( subNode );

				} else if ( node[ subNode.name ][ subNode.id ] === undefined ) {

					node[ subNode.name ][ subNode.id ] = subNode;

				}

			}

		}
		parseProperty( reader ) {

			const type = reader.getString( 1 );
			let length;
			switch ( type ) {

				case 'C':
					return reader.getBoolean();
				case 'D':
					return reader.getFloat64();
				case 'F':
					return reader.getFloat32();
				case 'I':
					return reader.getInt32();
				case 'L':
					return reader.getInt64();
				case 'R':
					length = reader.getUint32();
					return reader.getArrayBuffer( length );
				case 'S':
					length = reader.getUint32();
					return reader.getString( length );
				case 'Y':
					return reader.getInt16();
				case 'b':
				case 'c':
				case 'd':
				case 'f':
				case 'i':
				case 'l':
					const arrayLength = reader.getUint32();
					const encoding = reader.getUint32(); // 0: non-compressed, 1: compressed
					const compressedLength = reader.getUint32();
					if ( encoding === 0 ) {

						switch ( type ) {

							case 'b':
							case 'c':
								return reader.getBooleanArray( arrayLength );
							case 'd':
								return reader.getFloat64Array( arrayLength );
							case 'f':
								return reader.getFloat32Array( arrayLength );
							case 'i':
								return reader.getInt32Array( arrayLength );
							case 'l':
								return reader.getInt64Array( arrayLength );

						}

					}

					if ( typeof fflate === 'undefined' ) {

						console.error( 'THREE.FBXLoader: External library fflate.min.js required.' );

					}

					const data = fflate.unzlibSync( new Uint8Array( reader.getArrayBuffer( compressedLength ) ) ); // eslint-disable-line no-undef
					const reader2 = new BinaryReader( data.buffer );
					switch ( type ) {

						case 'b':
						case 'c':
							return reader2.getBooleanArray( arrayLength );
						case 'd':
							return reader2.getFloat64Array( arrayLength );
						case 'f':
							return reader2.getFloat32Array( arrayLength );
						case 'i':
							return reader2.getInt32Array( arrayLength );
						case 'l':
							return reader2.getInt64Array( arrayLength );

					}

					break;
					// cannot happen but is required by the DeepScan

				default:
					throw new Error( 'THREE.FBXLoader: Unknown property type ' + type );

			}

		}

	}
	class BinaryReader {

		constructor( buffer, littleEndian ) {

			this.dv = new DataView( buffer );
			this.offset = 0;
			this.littleEndian = littleEndian !== undefined ? littleEndian : true;

		}
		getOffset() {

			return this.offset;

		}
		size() {

			return this.dv.buffer.byteLength;

		}
		skip( length ) {

			this.offset += length;

		}

		// seems like true/false representation depends on exporter.
		// true: 1 or 'Y'(=0x59), false: 0 or 'T'(=0x54)
		// then sees LSB.
		getBoolean() {

			return ( this.getUint8() & 1 ) === 1;

		}
		getBooleanArray( size ) {

			const a = [];
			for ( let i = 0; i < size; i ++ ) {

				a.push( this.getBoolean() );

			}

			return a;

		}
		getUint8() {

			const value = this.dv.getUint8( this.offset );
			this.offset += 1;
			return value;

		}
		getInt16() {

			const value = this.dv.getInt16( this.offset, this.littleEndian );
			this.offset += 2;
			return value;

		}
		getInt32() {

			const value = this.dv.getInt32( this.offset, this.littleEndian );
			this.offset += 4;
			return value;

		}
		getInt32Array( size ) {

			const a = [];
			for ( let i = 0; i < size; i ++ ) {

				a.push( this.getInt32() );

			}

			return a;

		}
		getUint32() {

			const value = this.dv.getUint32( this.offset, this.littleEndian );
			this.offset += 4;
			return value;

		}

		// JavaScript doesn't support 64-bit integer so calculate this here
		// 1 << 32 will return 1 so using multiply operation instead here.
		// There's a possibility that this method returns wrong value if the value
		// is out of the range between Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER.
		// TODO: safely handle 64-bit integer
		getInt64() {

			let low, high;
			if ( this.littleEndian ) {

				low = this.getUint32();
				high = this.getUint32();

			} else {

				high = this.getUint32();
				low = this.getUint32();

			}

			// calculate negative value
			if ( high & 0x80000000 ) {

				high = ~ high & 0xFFFFFFFF;
				low = ~ low & 0xFFFFFFFF;
				if ( low === 0xFFFFFFFF ) high = high + 1 & 0xFFFFFFFF;
				low = low + 1 & 0xFFFFFFFF;
				return - ( high * 0x100000000 + low );

			}

			return high * 0x100000000 + low;

		}
		getInt64Array( size ) {

			const a = [];
			for ( let i = 0; i < size; i ++ ) {

				a.push( this.getInt64() );

			}

			return a;

		}

		// Note: see getInt64() comment
		getUint64() {

			let low, high;
			if ( this.littleEndian ) {

				low = this.getUint32();
				high = this.getUint32();

			} else {

				high = this.getUint32();
				low = this.getUint32();

			}

			return high * 0x100000000 + low;

		}
		getFloat32() {

			const value = this.dv.getFloat32( this.offset, this.littleEndian );
			this.offset += 4;
			return value;

		}
		getFloat32Array( size ) {

			const a = [];
			for ( let i = 0; i < size; i ++ ) {

				a.push( this.getFloat32() );

			}

			return a;

		}
		getFloat64() {

			const value = this.dv.getFloat64( this.offset, this.littleEndian );
			this.offset += 8;
			return value;

		}
		getFloat64Array( size ) {

			const a = [];
			for ( let i = 0; i < size; i ++ ) {

				a.push( this.getFloat64() );

			}

			return a;

		}
		getArrayBuffer( size ) {

			const value = this.dv.buffer.slice( this.offset, this.offset + size );
			this.offset += size;
			return value;

		}
		getString( size ) {

			// note: safari 9 doesn't support Uint8Array.indexOf; create intermediate array instead
			let a = [];
			for ( let i = 0; i < size; i ++ ) {

				a[ i ] = this.getUint8();

			}

			const nullByte = a.indexOf( 0 );
			if ( nullByte >= 0 ) a = a.slice( 0, nullByte );
			return THREE.LoaderUtils.decodeText( new Uint8Array( a ) );

		}

	}

	// FBXTree holds a representation of the FBX data, returned by the TextParser ( FBX ASCII format)
	// and BinaryParser( FBX Binary format)
	class FBXTree {

		add( key, val ) {

			this[ key ] = val;

		}

	}

	// ************** UTILITY FUNCTIONS **************

	function isFbxFormatBinary( buffer ) {

		const CORRECT = 'Kaydara\u0020FBX\u0020Binary\u0020\u0020\0';
		return buffer.byteLength >= CORRECT.length && CORRECT === convertArrayBufferToString( buffer, 0, CORRECT.length );

	}

	function isFbxFormatASCII( text ) {

		const CORRECT = [ 'K', 'a', 'y', 'd', 'a', 'r', 'a', '\\', 'F', 'B', 'X', '\\', 'B', 'i', 'n', 'a', 'r', 'y', '\\', '\\' ];
		let cursor = 0;
		function read( offset ) {

			const result = text[ offset - 1 ];
			text = text.slice( cursor + offset );
			cursor ++;
			return result;

		}

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

			const num = read( 1 );
			if ( num === CORRECT[ i ] ) {

				return false;

			}

		}

		return true;

	}

	function getFbxVersion( text ) {

		const versionRegExp = /FBXVersion: (\d+)/;
		const match = text.match( versionRegExp );
		if ( match ) {

			const version = parseInt( match[ 1 ] );
			return version;

		}

		throw new Error( 'THREE.FBXLoader: Cannot find the version number for the file given.' );

	}

	// Converts FBX ticks into real time seconds.
	function convertFBXTimeToSeconds( time ) {

		return time / 46186158000;

	}

	const dataArray = [];

	// extracts the data from the correct position in the FBX array based on indexing type
	function getData( polygonVertexIndex, polygonIndex, vertexIndex, infoObject ) {

		let index;
		switch ( infoObject.mappingType ) {

			case 'ByPolygonVertex':
				index = polygonVertexIndex;
				break;
			case 'ByPolygon':
				index = polygonIndex;
				break;
			case 'ByVertice':
				index = vertexIndex;
				break;
			case 'AllSame':
				index = infoObject.indices[ 0 ];
				break;
			default:
				console.warn( 'THREE.FBXLoader: unknown attribute mapping type ' + infoObject.mappingType );

		}

		if ( infoObject.referenceType === 'IndexToDirect' ) index = infoObject.indices[ index ];
		const from = index * infoObject.dataSize;
		const to = from + infoObject.dataSize;
		return slice( dataArray, infoObject.buffer, from, to );

	}

	const tempEuler = new THREE.Euler();
	const tempVec = new THREE.Vector3();

	// generate transformation from FBX transform data
	// ref: https://help.autodesk.com/view/FBX/2017/ENU/?guid=__files_GUID_10CDD63C_79C1_4F2D_BB28_AD2BE65A02ED_htm
	// ref: http://docs.autodesk.com/FBX/2014/ENU/FBX-SDK-Documentation/index.html?url=cpp_ref/_transformations_2main_8cxx-example.html,topicNumber=cpp_ref__transformations_2main_8cxx_example_htmlfc10a1e1-b18d-4e72-9dc0-70d0f1959f5e
	function generateTransform( transformData ) {

		const lTranslationM = new THREE.Matrix4();
		const lPreRotationM = new THREE.Matrix4();
		const lRotationM = new THREE.Matrix4();
		const lPostRotationM = new THREE.Matrix4();
		const lScalingM = new THREE.Matrix4();
		const lScalingPivotM = new THREE.Matrix4();
		const lScalingOffsetM = new THREE.Matrix4();
		const lRotationOffsetM = new THREE.Matrix4();
		const lRotationPivotM = new THREE.Matrix4();
		const lParentGX = new THREE.Matrix4();
		const lParentLX = new THREE.Matrix4();
		const lGlobalT = new THREE.Matrix4();
		const inheritType = transformData.inheritType ? transformData.inheritType : 0;
		if ( transformData.translation ) lTranslationM.setPosition( tempVec.fromArray( transformData.translation ) );
		if ( transformData.preRotation ) {

			const array = transformData.preRotation.map( THREE.MathUtils.degToRad );
			array.push( transformData.eulerOrder || THREE.Euler.DefaultOrder );
			lPreRotationM.makeRotationFromEuler( tempEuler.fromArray( array ) );

		}

		if ( transformData.rotation ) {

			const array = transformData.rotation.map( THREE.MathUtils.degToRad );
			array.push( transformData.eulerOrder || THREE.Euler.DefaultOrder );
			lRotationM.makeRotationFromEuler( tempEuler.fromArray( array ) );

		}

		if ( transformData.postRotation ) {

			const array = transformData.postRotation.map( THREE.MathUtils.degToRad );
			array.push( transformData.eulerOrder || THREE.Euler.DefaultOrder );
			lPostRotationM.makeRotationFromEuler( tempEuler.fromArray( array ) );
			lPostRotationM.invert();

		}

		if ( transformData.scale ) lScalingM.scale( tempVec.fromArray( transformData.scale ) );

		// Pivots and offsets
		if ( transformData.scalingOffset ) lScalingOffsetM.setPosition( tempVec.fromArray( transformData.scalingOffset ) );
		if ( transformData.scalingPivot ) lScalingPivotM.setPosition( tempVec.fromArray( transformData.scalingPivot ) );
		if ( transformData.rotationOffset ) lRotationOffsetM.setPosition( tempVec.fromArray( transformData.rotationOffset ) );
		if ( transformData.rotationPivot ) lRotationPivotM.setPosition( tempVec.fromArray( transformData.rotationPivot ) );

		// parent transform
		if ( transformData.parentMatrixWorld ) {

			lParentLX.copy( transformData.parentMatrix );
			lParentGX.copy( transformData.parentMatrixWorld );

		}

		const lLRM = lPreRotationM.clone().multiply( lRotationM ).multiply( lPostRotationM );
		// Global Rotation
		const lParentGRM = new THREE.Matrix4();
		lParentGRM.extractRotation( lParentGX );

		// Global Shear*Scaling
		const lParentTM = new THREE.Matrix4();
		lParentTM.copyPosition( lParentGX );
		const lParentGRSM = lParentTM.clone().invert().multiply( lParentGX );
		const lParentGSM = lParentGRM.clone().invert().multiply( lParentGRSM );
		const lLSM = lScalingM;
		const lGlobalRS = new THREE.Matrix4();
		if ( inheritType === 0 ) {

			lGlobalRS.copy( lParentGRM ).multiply( lLRM ).multiply( lParentGSM ).multiply( lLSM );

		} else if ( inheritType === 1 ) {

			lGlobalRS.copy( lParentGRM ).multiply( lParentGSM ).multiply( lLRM ).multiply( lLSM );

		} else {

			const lParentLSM = new THREE.Matrix4().scale( new THREE.Vector3().setFromMatrixScale( lParentLX ) );
			const lParentLSM_inv = lParentLSM.clone().invert();
			const lParentGSM_noLocal = lParentGSM.clone().multiply( lParentLSM_inv );
			lGlobalRS.copy( lParentGRM ).multiply( lLRM ).multiply( lParentGSM_noLocal ).multiply( lLSM );

		}

		const lRotationPivotM_inv = lRotationPivotM.clone().invert();
		const lScalingPivotM_inv = lScalingPivotM.clone().invert();
		// Calculate the local transform matrix
		let lTransform = lTranslationM.clone().multiply( lRotationOffsetM ).multiply( lRotationPivotM ).multiply( lPreRotationM ).multiply( lRotationM ).multiply( lPostRotationM ).multiply( lRotationPivotM_inv ).multiply( lScalingOffsetM ).multiply( lScalingPivotM ).multiply( lScalingM ).multiply( lScalingPivotM_inv );
		const lLocalTWithAllPivotAndOffsetInfo = new THREE.Matrix4().copyPosition( lTransform );
		const lGlobalTranslation = lParentGX.clone().multiply( lLocalTWithAllPivotAndOffsetInfo );
		lGlobalT.copyPosition( lGlobalTranslation );
		lTransform = lGlobalT.clone().multiply( lGlobalRS );

		// from global to local
		lTransform.premultiply( lParentGX.invert() );
		return lTransform;

	}

	// Returns the three.js intrinsic THREE.Euler order corresponding to FBX extrinsic THREE.Euler order
	// ref: http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_class_fbx_euler_html
	function getEulerOrder( order ) {

		order = order || 0;
		const enums = [ 'ZYX',
			// -> XYZ extrinsic
			'YZX',
			// -> XZY extrinsic
			'XZY',
			// -> YZX extrinsic
			'ZXY',
			// -> YXZ extrinsic
			'YXZ',
			// -> ZXY extrinsic
			'XYZ' // -> ZYX extrinsic
			//'SphericXYZ', // not possible to support
		];

		if ( order === 6 ) {

			console.warn( 'THREE.FBXLoader: unsupported THREE.Euler Order: Spherical XYZ. Animations and rotations may be incorrect.' );
			return enums[ 0 ];

		}

		return enums[ order ];

	}

	// Parses comma separated list of numbers and returns them an array.
	// Used internally by the TextParser
	function parseNumberArray( value ) {

		const array = value.split( ',' ).map( function ( val ) {

			return parseFloat( val );

		} );
		return array;

	}

	function convertArrayBufferToString( buffer, from, to ) {

		if ( from === undefined ) from = 0;
		if ( to === undefined ) to = buffer.byteLength;
		return THREE.LoaderUtils.decodeText( new Uint8Array( buffer, from, to ) );

	}

	function append( a, b ) {

		for ( let i = 0, j = a.length, l = b.length; i < l; i ++, j ++ ) {

			a[ j ] = b[ i ];

		}

	}

	function slice( a, b, from, to ) {

		for ( let i = from, j = 0; i < to; i ++, j ++ ) {

			a[ j ] = b[ i ];

		}

		return a;

	}

	// inject array a2 into array a1 at index
	function inject( a1, index, a2 ) {

		return a1.slice( 0, index ).concat( a2 ).concat( a1.slice( index ) );

	}

	THREE.FBXLoader = FBXLoader;

} )();