text: import {
  	BufferGeometryLoader,
  	FileLoader,
  	Loader,
  	Object3D,
  	MeshStandardMaterial,
  	Mesh,
  	Color,
  	Points,
  	PointsMaterial,
  	Line,
  	LineBasicMaterial,
  	Matrix4,
  	DirectionalLight,
  	PointLight,
  	SpotLight,
  	RectAreaLight,
  	Vector3,
  	Sprite,
  	SpriteMaterial,
  	CanvasTexture,
  	LinearFilter,
  	ClampToEdgeWrapping,
  	TextureLoader
  } from '../../../src/Three';
  
  var Rhino3dmLoader = function ( manager ) {
  
  	Loader.call( this, manager );
  
  	this.libraryPath = '';
  	this.libraryPending = null;
  	this.libraryBinary = null;
  	this.libraryConfig = {};
  
  	this.workerLimit = 4;
  	this.workerPool = [];
  	this.workerNextTaskID = 1;
  	this.workerSourceURL = '';
  	this.workerConfig = {};
  
  	this.materials = [];
  
  };
  
  Rhino3dmLoader.taskCache = new WeakMap();
  
  Rhino3dmLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
  
  	constructor: Rhino3dmLoader,
  
  	setLibraryPath: function ( path ) {
  
  		this.libraryPath = path;
  
  		return this;
  
  	},
  
  	setWorkerLimit: function ( workerLimit ) {
  
  		this.workerLimit = workerLimit;
  
  		return this;
  
  	},
  
  	load: function ( url, onLoad, onProgress, onError ) {
  
  		var loader = new FileLoader( this.manager );
  
  		loader.setPath( this.path );
  		loader.setResponseType( 'arraybuffer' );
  		loader.setRequestHeader( this.requestHeader );
  
  		loader.load( url, ( buffer ) => {
  
  			// Check for an existing task using this buffer. A transferred buffer cannot be transferred
  			// again from this thread.
  			if ( Rhino3dmLoader.taskCache.has( buffer ) ) {
  
  				var cachedTask = Rhino3dmLoader.taskCache.get( buffer );
  
  				return cachedTask.promise.then( onLoad ).catch( onError );
  
  			}
  
  			this.decodeObjects( buffer, url )
  				.then( onLoad )
  				.catch( onError );
  
  		}, onProgress, onError );
  
  
  	},
  
  	debug: function () {
  
  		console.log( 'Task load: ', this.workerPool.map( ( worker ) => worker._taskLoad ) );
  
  	},
  
  	decodeObjects: function ( buffer, url ) {
  
  		var worker;
  		var taskID;
  
  		var taskCost = buffer.byteLength;
  
  		var objectPending = this._getWorker( taskCost )
  			.then( ( _worker ) => {
  
  				worker = _worker;
  				taskID = this.workerNextTaskID ++; //hmmm
  
  				return new Promise( ( resolve, reject ) => {
  
  					worker._callbacks[ taskID ] = { resolve, reject };
  
  					worker.postMessage( { type: 'decode', id: taskID, buffer }, [ buffer ] );
  
  					//this.debug();
  
  				} );
  
  			} )
  			.then( ( message ) => this._createGeometry( message.data ) );
  
  		// Remove task from the task list.
  		// Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
  		objectPending
  			.catch( () => true )
  			.then( () => {
  
  				if ( worker && taskID ) {
  
  					this._releaseTask( worker, taskID );
  
  					//this.debug();
  
  				}
  
  			} );
  
  		// Cache the task result.
  		Rhino3dmLoader.taskCache.set( buffer, {
  
  			url: url,
  			promise: objectPending
  
  		} );
  
  		return objectPending;
  
  	},
  
  	parse: function ( data, onLoad, onError ) {
  
  		this.decodeObjects( data, '' )
  			.then( onLoad )
  			.catch( onError );
  
  	},
  
  	_compareMaterials: function ( material ) {
  
  		var mat = {};
  		mat.name = material.name;
  		mat.color = {};
  		mat.color.r = material.color.r;
  		mat.color.g = material.color.g;
  		mat.color.b = material.color.b;
  		mat.type = material.type;
  
  		for ( var i = 0; i < this.materials.length; i ++ ) {
  
  			var m = this.materials[ i ];
  			var _mat = {};
  			_mat.name = m.name;
  			_mat.color = {};
  			_mat.color.r = m.color.r;
  			_mat.color.g = m.color.g;
  			_mat.color.b = m.color.b;
  			_mat.type = m.type;
  
  			if ( JSON.stringify( mat ) === JSON.stringify( _mat ) ) {
  
  				return m;
  
  			}
  
  		}
  
  		this.materials.push( material );
  
  		return material;
  
  	},
  
  	_createMaterial: function ( material ) {
  
  		if ( material === undefined ) {
  
  			return new MeshStandardMaterial( {
  				color: new Color( 1, 1, 1 ),
  				metalness: 0.8,
  				name: 'default',
  				side: 2
  			} );
  
  		}
  
  		var _diffuseColor = material.diffuseColor;
  
  		var diffusecolor = new Color( _diffuseColor.r / 255.0, _diffuseColor.g / 255.0, _diffuseColor.b / 255.0 );
  
  		if ( _diffuseColor.r === 0 && _diffuseColor.g === 0 && _diffuseColor.b === 0 ) {
  
  			diffusecolor.r = 1;
  			diffusecolor.g = 1;
  			diffusecolor.b = 1;
  
  		}
  
  		// console.log( material );
  
  		var mat = new MeshStandardMaterial( {
  			color: diffusecolor,
  			name: material.name,
  			side: 2,
  			transparent: material.transparency > 0 ? true : false,
  			opacity: 1.0 - material.transparency
  		} );
  
  		var textureLoader = new TextureLoader();
  
  		for ( var i = 0; i < material.textures.length; i ++ ) {
  
  			var texture = material.textures[ i ];
  
  			if ( texture.image !== null ) {
  
  				var map = textureLoader.load( texture.image );
  
  				switch ( texture.type ) {
  
  					case 'Diffuse':
  
  						mat.map = map;
  
  						break;
  
  					case 'Bump':
  
  						mat.bumpMap = map;
  
  						break;
  
  					case 'Transparency':
  
  						mat.alphaMap = map;
  						mat.transparent = true;
  
  						break;
  
  					case 'Emap':
  
  						mat.envMap = map;
  
  						break;
  
  				}
  
  			}
  
  		}
  
  		return mat;
  
  	},
  
  	_createGeometry: function ( data ) {
  
  		// console.log(data);
  
  		var object = new Object3D();
  		var instanceDefinitionObjects = [];
  		var instanceDefinitions = [];
  		var instanceReferences = [];
  
  		object.userData[ 'layers' ] = data.layers;
  		object.userData[ 'groups' ] = data.groups;
  		object.userData[ 'settings' ] = data.settings;
  
  		var objects = data.objects;
  		var materials = data.materials;
  
  		for ( var i = 0; i < objects.length; i ++ ) {
  
  			var obj = objects[ i ];
  			var attributes = obj.attributes;
  
  			switch ( obj.objectType ) {
  
  				case 'InstanceDefinition':
  
  					instanceDefinitions.push( obj );
  
  					break;
  
  				case 'InstanceReference':
  
  					instanceReferences.push( obj );
  
  					break;
  
  				default:
  
  					if ( attributes.hasOwnProperty( 'materialUUID' ) ) {
  
  						var rMaterial = materials.find( m => m.id === attributes.materialUUID );
  						var material = this._createMaterial( rMaterial );
  						material = this._compareMaterials( material );
  						var _object = this._createObject( obj, material );
  
  					} else {
  
  						var material = this._createMaterial( );
  						var _object = this._createObject( obj, material );
  
  					}
  
  					if ( _object === undefined ) {
  
  						continue;
  
  					}
  
  					var layer = data.layers[ attributes.layerIndex ];
  
  					_object.visible = layer ? data.layers[ attributes.layerIndex ].visible : true;
  
  					if ( attributes.isInstanceDefinitionObject ) {
  
  						instanceDefinitionObjects.push( _object );
  
  					} else {
  
  						object.add( _object );
  
  					}
  
  					break;
  
  			}
  
  		}
  
  		for ( var i = 0; i < instanceDefinitions.length; i ++ ) {
  
  			var iDef = instanceDefinitions[ i ];
  
  			var objects = [];
  
  			for ( var j = 0; j < iDef.attributes.objectIds.length; j ++ ) {
  
  				var objId = iDef.attributes.objectIds[ j ];
  
  				for ( var p = 0; p < instanceDefinitionObjects.length; p ++ ) {
  
  					var idoId = instanceDefinitionObjects[ p ].userData.attributes.id;
  
  					if ( objId === idoId ) {
  
  						objects.push( instanceDefinitionObjects[ p ] );
  
  					}
  
  				}
  
  			}
  
  			// Currently clones geometry and does not take advantage of instancing
  
  			for ( var j = 0; j < instanceReferences.length; j ++ ) {
  
  				var iRef = instanceReferences[ j ];
  
  				if ( iRef.geometry.parentIdefId === iDef.attributes.id ) {
  
  					var iRefObject = new Object3D();
  					var xf = iRef.geometry.xform.array;
  
  					var matrix = new Matrix4();
            			matrix.set( xf[ 0 ], xf[ 1 ], xf[ 2 ], xf[ 3 ], xf[ 4 ], xf[ 5 ], xf[ 6 ], xf[ 7 ], xf[ 8 ], xf[ 9 ], xf[ 10 ], xf[ 11 ], xf[ 12 ], xf[ 13 ], xf[ 14 ], xf[ 15 ] );
  
  					iRefObject.applyMatrix4( matrix );
  
  					for ( var p = 0; p < objects.length; p ++ ) {
  
  						iRefObject.add( objects[ p ].clone( true ) );
  
  					}
  
  					object.add( iRefObject );
  
  				}
  
  			}
  
  		}
  
  		this.materials = [];
  
  		return object;
  
  	},
  
  	_createObject: function ( obj, mat ) {
  
  		var loader = new BufferGeometryLoader();
  
  		var attributes = obj.attributes;
  
  		switch ( obj.objectType ) {
  
  			case 'Point':
  			case 'PointSet':
  
  				var geometry = loader.parse( obj.geometry );
  				var _color = attributes.drawColor;
  				var color = new Color( _color.r / 255.0, _color.g / 255.0, _color.b / 255.0 );
  				var material = new PointsMaterial( { color: color, sizeAttenuation: false, size: 2 } );
  
  				if ( geometry.attributes.hasOwnProperty( 'color' ) ) {
  
  					material.vertexColors = true;
  
  				}
  
  				material = this._compareMaterials( material );
  
  				var points = new Points( geometry, material );
  				points.userData[ 'attributes' ] = attributes;
  				points.userData[ 'objectType' ] = obj.objectType;
  
  				if ( attributes.name ) {
  
  					points.name = attributes.name;
  
  				}
  
  				return points;
  
  			case 'Mesh':
  			case 'Extrusion':
  			case 'SubD':
  
  				var geometry = loader.parse( obj.geometry );
  
  				if ( geometry.attributes.hasOwnProperty( 'color' ) ) {
  
  					mat.vertexColors = true;
  
  				}
  
  				if ( mat === null ) {
  
  					mat = this._createMaterial();
  					mat = this._compareMaterials( mat );
  
  				}
  
  				var mesh = new Mesh( geometry, mat );
  				mesh.castShadow = attributes.castsShadows;
  				mesh.receiveShadow = attributes.receivesShadows;
  				mesh.userData[ 'attributes' ] = attributes;
  				mesh.userData[ 'objectType' ] = obj.objectType;
  
  				if ( attributes.name ) {
  
  					mesh.name = attributes.name;
  
  				}
  
  				return mesh;
  
  			case 'Brep':
  
  				var brepObject = new Object3D();
  
  				for ( var j = 0; j < obj.geometry.length; j ++ ) {
  
  					geometry = loader.parse( obj.geometry[ j ] );
  					var mesh = new Mesh( geometry, mat );
  					mesh.castShadow = attributes.castsShadows;
  					mesh.receiveShadow = attributes.receivesShadows;
  
  					brepObject.add( mesh );
  
  				}
  
  				brepObject.userData[ 'attributes' ] = attributes;
  				brepObject.userData[ 'objectType' ] = obj.objectType;
  
  				if ( attributes.name ) {
  
  					brepObject.name = attributes.name;
  
  				}
  
  				return brepObject;
  
  			case 'Curve':
  
  				geometry = loader.parse( obj.geometry );
  
  				var _color = attributes.drawColor;
  				var color = new Color( _color.r / 255.0, _color.g / 255.0, _color.b / 255.0 );
  
  				var material = new LineBasicMaterial( { color: color } );
  				material = this._compareMaterials( material );
  
  				var lines = new Line( geometry, material );
  				lines.userData[ 'attributes' ] = attributes;
  				lines.userData[ 'objectType' ] = obj.objectType;
  
  				if ( attributes.name ) {
  
  					lines.name = attributes.name;
  
  				}
  
  				return lines;
  
  			case 'TextDot':
  
  				geometry = obj.geometry;
  
  				var ctx = document.createElement( 'canvas' ).getContext( '2d' );
  				var font = `${geometry.fontHeight}px ${geometry.fontFace}`;
  				ctx.font = font;
  				var width = ctx.measureText( geometry.text ).width + 10;
  				var height = geometry.fontHeight + 10;
  
  				var r = window.devicePixelRatio;
  
  				ctx.canvas.width = width * r;
  				ctx.canvas.height = height * r;
  				ctx.canvas.style.width = width + 'px';
  				ctx.canvas.style.height = height + 'px';
  				ctx.setTransform( r, 0, 0, r, 0, 0 );
  
  				ctx.font = font;
  				ctx.textBaseline = 'middle';
  				ctx.textAlign = 'center';
  				var color = attributes.drawColor;
  				ctx.fillStyle = `rgba(${color.r},${color.g},${color.b},${color.a})`;
  				ctx.fillRect( 0, 0, width, height );
  				ctx.fillStyle = 'white';
  				ctx.fillText( geometry.text, width / 2, height / 2 );
  
  				var texture = new CanvasTexture( ctx.canvas );
  				texture.minFilter = LinearFilter;
  				texture.wrapS = ClampToEdgeWrapping;
  				texture.wrapT = ClampToEdgeWrapping;
  
  				var material = new SpriteMaterial( { map: texture, depthTest: false } );
  				var sprite = new Sprite( material );
  				sprite.position.set( geometry.point[ 0 ], geometry.point[ 1 ], geometry.point[ 2 ] );
  				sprite.scale.set( width / 10, height / 10, 1.0 );
  
  				sprite.userData[ 'attributes' ] = attributes;
  				sprite.userData[ 'objectType' ] = obj.objectType;
  
  				if ( attributes.name ) {
  
  					sprite.name = attributes.name;
  
  				}
  
  				return sprite;
  
  			case 'Light':
  
  				geometry = obj.geometry;
  
  				var light;
  
  				if ( geometry.isDirectionalLight ) {
  
  					light = new DirectionalLight();
  					light.castShadow = attributes.castsShadows;
  					light.position.set( geometry.location[ 0 ], geometry.location[ 1 ], geometry.location[ 2 ] );
  					light.target.position.set( geometry.direction[ 0 ], geometry.direction[ 1 ], geometry.direction[ 2 ] );
  					light.shadow.normalBias = 0.1;
  
  				} else if ( geometry.isPointLight ) {
  
  					light = new PointLight();
  					light.castShadow = attributes.castsShadows;
  					light.position.set( geometry.location[ 0 ], geometry.location[ 1 ], geometry.location[ 2 ] );
  					light.shadow.normalBias = 0.1;
  
  				} else if ( geometry.isRectangularLight ) {
  
  					light = new RectAreaLight();
  
  					var width = Math.abs( geometry.width[ 2 ] );
  					var height = Math.abs( geometry.length[ 0 ] );
  
  					light.position.set( geometry.location[ 0 ] - ( height / 2 ), geometry.location[ 1 ], geometry.location[ 2 ] - ( width / 2 ) );
  
  					light.height = height;
  					light.width = width;
  
  					light.lookAt( new Vector3( geometry.direction[ 0 ], geometry.direction[ 1 ], geometry.direction[ 2 ] ) );
  
  				} else if ( geometry.isSpotLight ) {
  
  					light = new SpotLight();
  					light.castShadow = attributes.castsShadows;
  					light.position.set( geometry.location[ 0 ], geometry.location[ 1 ], geometry.location[ 2 ] );
  					light.target.position.set( geometry.direction[ 0 ], geometry.direction[ 1 ], geometry.direction[ 2 ] );
  					light.angle = geometry.spotAngleRadians;
  					light.shadow.normalBias = 0.1;
  
  				} else if ( geometry.isLinearLight ) {
  
  					console.warn( 'THREE.3DMLoader:  No conversion exists for linear lights.' );
  
  					return;
  
  				}
  
  				if ( light ) {
  
  					light.intensity = geometry.intensity;
  					var _color = geometry.diffuse;
  					var color = new Color( _color.r / 255.0, _color.g / 255.0, _color.b / 255.0 );
  					light.color = color;
  					light.userData[ 'attributes' ] = attributes;
  					light.userData[ 'objectType' ] = obj.objectType;
  
  				}
  
  				return light;
  
  		}
  
  	},
  
  	_initLibrary: function () {
  
  		if ( ! this.libraryPending ) {
  
  			// Load rhino3dm wrapper.
  			var jsLoader = new FileLoader( this.manager );
  			jsLoader.setPath( this.libraryPath );
  			var jsContent = new Promise( ( resolve, reject ) => {
  
  				jsLoader.load( 'rhino3dm.js', resolve, undefined, reject );
  
  			} );
  
  			// Load rhino3dm WASM binary.
  			var binaryLoader = new FileLoader( this.manager );
  			binaryLoader.setPath( this.libraryPath );
  			binaryLoader.setResponseType( 'arraybuffer' );
  			var binaryContent = new Promise( ( resolve, reject ) => {
  
  				binaryLoader.load( 'rhino3dm.wasm', resolve, undefined, reject );
  
  			} );
  
  			this.libraryPending = Promise.all( [ jsContent, binaryContent ] )
  				.then( ( [ jsContent, binaryContent ] ) => {
  
  					//this.libraryBinary = binaryContent;
  					this.libraryConfig.wasmBinary = binaryContent;
  
  					var fn = Rhino3dmLoader.Rhino3dmWorker.toString();
  
  					var body = [
  						'/* rhino3dm.js */',
  						jsContent,
  						'/* worker */',
  						fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
  					].join( '\n' );
  
  					this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
  
  				} );
  
  		}
  
  		return this.libraryPending;
  
  	},
  
  	_getWorker: function ( taskCost ) {
  
  		return this._initLibrary().then( () => {
  
  			if ( this.workerPool.length < this.workerLimit ) {
  
  				var worker = new Worker( this.workerSourceURL );
  
  				worker._callbacks = {};
  				worker._taskCosts = {};
  				worker._taskLoad = 0;
  
  				worker.postMessage( {
  					type: 'init',
  					libraryConfig: this.libraryConfig
  				} );
  
  				worker.onmessage = function ( e ) {
  
  					var message = e.data;
  
  					switch ( message.type ) {
  
  						case 'decode':
  							worker._callbacks[ message.id ].resolve( message );
  							break;
  
  						case 'error':
  							worker._callbacks[ message.id ].reject( message );
  							break;
  
  						default:
  							console.error( 'THREE.Rhino3dmLoader: Unexpected message, "' + message.type + '"' );
  
  					}
  
  				};
  
  				this.workerPool.push( worker );
  
  			} else {
  
  				this.workerPool.sort( function ( a, b ) {
  
  					return a._taskLoad > b._taskLoad ? - 1 : 1;
  
  				} );
  
  			}
  
  			var worker = this.workerPool[ this.workerPool.length - 1 ];
  
  			worker._taskLoad += taskCost;
  
  			return worker;
  
  		} );
  
  	},
  
  	_releaseTask: function ( worker, taskID ) {
  
  		worker._taskLoad -= worker._taskCosts[ taskID ];
  		delete worker._callbacks[ taskID ];
  		delete worker._taskCosts[ taskID ];
  
  	},
  
  	dispose: function () {
  
  		for ( var i = 0; i < this.workerPool.length; ++ i ) {
  
  			this.workerPool[ i ].terminate();
  
  		}
  
  		this.workerPool.length = 0;
  
  		return this;
  
  	}
  
  } );
  
  /* WEB WORKER */
  
  Rhino3dmLoader.Rhino3dmWorker = function () {
  
  	var libraryPending;
  	var libraryConfig;
  	var rhino;
  
  	onmessage = function ( e ) {
  
  		var message = e.data;
  
  		switch ( message.type ) {
  
  			case 'init':
  
  				libraryConfig = message.libraryConfig;
  				var wasmBinary = libraryConfig.wasmBinary;
  				var RhinoModule;
  				libraryPending = new Promise( function ( resolve ) {
  
  					/* Like Basis Loader */
  					RhinoModule = { wasmBinary, onRuntimeInitialized: resolve };
  
  					rhino3dm( RhinoModule ); // eslint-disable-line no-undef
  
  				 } ).then( () => {
  
  					rhino = RhinoModule;
  
  				 } );
  
  				break;
  
  			case 'decode':
  
  				var buffer = message.buffer;
  				libraryPending.then( () => {
  
  					var data = decodeObjects( rhino, buffer );
  
  					self.postMessage( { type: 'decode', id: message.id, data } );
  
  				} );
  
  				break;
  
  		}
  
  	};
  
  	function decodeObjects( rhino, buffer ) {
  
  		var arr = new Uint8Array( buffer );
  		var doc = rhino.File3dm.fromByteArray( arr );
  
  		var objects = [];
  		var materials = [];
  		var layers = [];
  		var views = [];
  		var namedViews = [];
  		var groups = [];
  
  		//Handle objects
  
  		var objs = doc.objects();
  		var cnt = objs.count;
  
  		for ( var i = 0; i < cnt; i ++ ) {
  
  			var _object = objs.get( i );
  
  			var object = extractObjectData( _object, doc );
  
  			_object.delete();
  
  			if ( object !== undefined ) {
  
  				if ( object.attributes.materialIndex >= 0 ) {
  
  					var mId = doc.materials().findIndex( object.attributes.materialIndex ).id;
  					object.attributes.materialUUID = mId;
  
  				}
  
  				objects.push( object );
  
  			}
  
  		}
  
  		// Handle instance definitions
  		// console.log( `Instance Definitions Count: ${doc.instanceDefinitions().count()}` );
  
  		for ( var i = 0; i < doc.instanceDefinitions().count(); i ++ ) {
  
  			var idef = doc.instanceDefinitions().get( i );
  			var idefAttributes = extractProperties( idef );
  			idefAttributes.objectIds = idef.getObjectIds();
  
  			objects.push( { geometry: null, attributes: idefAttributes, objectType: 'InstanceDefinition' } );
  
  		}
  
  		// Handle materials
  
  		var textureTypes = [
  			// rhino.TextureType.Bitmap,
  			rhino.TextureType.Diffuse,
  			rhino.TextureType.Bump,
  			rhino.TextureType.Transparency,
  			rhino.TextureType.Opacity,
  			rhino.TextureType.Emap
  		];
  
  		var pbrTextureTypes = [
  			rhino.TextureType.PBR_BaseColor,
  			rhino.TextureType.PBR_Subsurface,
  			rhino.TextureType.PBR_SubsurfaceScattering,
  			rhino.TextureType.PBR_SubsurfaceScatteringRadius,
  			rhino.TextureType.PBR_Metallic,
  			rhino.TextureType.PBR_Specular,
  			rhino.TextureType.PBR_SpecularTint,
  			rhino.TextureType.PBR_Roughness,
  			rhino.TextureType.PBR_Anisotropic,
  			rhino.TextureType.PBR_Anisotropic_Rotation,
  			rhino.TextureType.PBR_Sheen,
  			rhino.TextureType.PBR_SheenTint,
  			rhino.TextureType.PBR_Clearcoat,
  			rhino.TextureType.PBR_ClearcoatBump,
  			rhino.TextureType.PBR_ClearcoatRoughness,
  			rhino.TextureType.PBR_OpacityIor,
  			rhino.TextureType.PBR_OpacityRoughness,
  			rhino.TextureType.PBR_Emission,
  			rhino.TextureType.PBR_AmbientOcclusion,
  			rhino.TextureType.PBR_Displacement
  		];
  
  		for ( var i = 0; i < doc.materials().count(); i ++ ) {
  
  			var _material = doc.materials().get( i );
  			var _pbrMaterial = _material.physicallyBased();
  
  			var material = extractProperties( _material );
  
  			var textures = [];
  
  			for ( var j = 0; j < textureTypes.length; j ++ ) {
  
  				var _texture = _material.getTexture( textureTypes[ j ] );
  				if ( _texture ) {
  
  					var textureType = textureTypes[ j ].constructor.name;
  					textureType = textureType.substring( 12, textureType.length );
  					var texture = { type: textureType };
  
  					var image = doc.getEmbeddedFileAsBase64( _texture.fileName );
  
  					if ( image ) {
  
  						texture.image = 'data:image/png;base64,' + image;
  
  					} else {
  
  						console.warn( `THREE.3DMLoader: Image for ${textureType} texture not embedded in file.` );
  						texture.image = null;
  
  					}
  
  					textures.push( texture );
  
  					_texture.delete();
  
  				}
  
  			}
  
  			material.textures = textures;
  
  			if ( _pbrMaterial.supported ) {
  
  				console.log( 'pbr true' );
  
  				for ( var j = 0; j < pbrTextureTypes.length; j ++ ) {
  
  					var _texture = _material.getTexture( textureTypes[ j ] );
  					if ( _texture ) {
  
  						var image = doc.getEmbeddedFileAsBase64( _texture.fileName );
  						var textureType = textureTypes[ j ].constructor.name;
  						textureType = textureType.substring( 12, textureType.length );
  						var texture = { type: textureType, image: 'data:image/png;base64,' + image };
  						textures.push( texture );
  
  						_texture.delete();
  
  					}
  
  				}
  
  				var pbMaterialProperties = extractProperties( _material.physicallyBased() );
  
  				material = Object.assign( pbMaterialProperties, material );
  
  			}
  
  			materials.push( material );
  
  			_material.delete();
  			_pbrMaterial.delete();
  
  		}
  
  		// Handle layers
  
  		for ( var i = 0; i < doc.layers().count(); i ++ ) {
  
  			var _layer = doc.layers().get( i );
  			var layer = extractProperties( _layer );
  
  			layers.push( layer );
  
  			_layer.delete();
  
  		}
  
  		// Handle views
  
  		for ( var i = 0; i < doc.views().count(); i ++ ) {
  
  			var _view = doc.views().get( i );
  			var view = extractProperties( _view );
  
  			views.push( view );
  
  			_view.delete();
  
  		}
  
  		// Handle named views
  
  		for ( var i = 0; i < doc.namedViews().count(); i ++ ) {
  
  			var _namedView = doc.namedViews().get( i );
  			var namedView = extractProperties( _namedView );
  
  			namedViews.push( namedView );
  
  			_namedView.delete();
  
  		}
  
  		// Handle groups
  
  		for ( var i = 0; i < doc.groups().count(); i ++ ) {
  
  			var _group = doc.groups().get( i );
  			var group = extractProperties( _group );
  
  			groups.push( group );
  
  			_group.delete();
  
  		}
  
  		// Handle settings
  
  		var settings = extractProperties( doc.settings() );
  
  		//TODO: Handle other document stuff like dimstyles, instance definitions, bitmaps etc.
  
  		// Handle dimstyles
  		// console.log( `Dimstyle Count: ${doc.dimstyles().count()}` );
  
  		// Handle bitmaps
  		// console.log( `Bitmap Count: ${doc.bitmaps().count()}` );
  
  		// Handle strings -- this seems to be broken at the moment in rhino3dm
  		// console.log( `Document Strings Count: ${doc.strings().count()}` );
  
  		/*
  		for( var i = 0; i < doc.strings().count(); i++ ){
  
  			var _string= doc.strings().get( i );
  
  			console.log(_string);
  			var string = extractProperties( _group );
  
  			strings.push( string );
  
  			_string.delete();
  
  		}
  		*/
  
  		doc.delete();
  
  		return { objects, materials, layers, views, namedViews, groups, settings };
  
  	}
  
  	function extractObjectData( object, doc ) {
  
  		var _geometry = object.geometry();
  		var _attributes = object.attributes();
  		var objectType = _geometry.objectType;
  		var geometry = null;
  		var attributes = null;
  
  		// skip instance definition objects
  		//if( _attributes.isInstanceDefinitionObject ) { continue; }
  
  		// TODO: handle other geometry types
  		switch ( objectType ) {
  
  			case rhino.ObjectType.Curve:
  
  				var pts = curveToPoints( _geometry, 100 );
  
  				var position = {};
  				var attributes = {};
  				var data = {};
  
  				position.itemSize = 3;
  				position.type = 'Float32Array';
  				position.array = [];
  
  				for ( var j = 0; j < pts.length; j ++ ) {
  
  					position.array.push( pts[ j ][ 0 ] );
  					position.array.push( pts[ j ][ 1 ] );
  					position.array.push( pts[ j ][ 2 ] );
  
  				}
  
  				attributes.position = position;
  				data.attributes = attributes;
  
  				geometry = { data };
  
  				break;
  
  			case rhino.ObjectType.Point:
  
  				var pt = _geometry.location;
  
  				var position = {};
  				var color = {};
  				var attributes = {};
  				var data = {};
  
  				position.itemSize = 3;
  				position.type = 'Float32Array';
  				position.array = [ pt[ 0 ], pt[ 1 ], pt[ 2 ] ];
  
  				var _color = _attributes.drawColor( doc );
  
  				color.itemSize = 3;
  				color.type = 'Float32Array';
  				color.array = [ _color.r / 255.0, _color.g / 255.0, _color.b / 255.0 ];
  
  				attributes.position = position;
  				attributes.color = color;
  				data.attributes = attributes;
  
  				geometry = { data };
  
  				break;
  
  			case rhino.ObjectType.PointSet:
  			case rhino.ObjectType.Mesh:
  
  				geometry = _geometry.toThreejsJSON();
  
  				break;
  
  			case rhino.ObjectType.Brep:
  
  				var faces = _geometry.faces();
  				geometry = [];
  
  				for ( var faceIndex = 0; faceIndex < faces.count; faceIndex ++ ) {
  
  					var face = faces.get( faceIndex );
  					var mesh = face.getMesh( rhino.MeshType.Any );
  
  					if ( mesh ) {
  
  						geometry.push( mesh.toThreejsJSON() );
  						mesh.delete();
  
  					}
  
  					face.delete();
  
  				}
  
  				faces.delete();
  
  				break;
  
  			case rhino.ObjectType.Extrusion:
  
  				var mesh = _geometry.getMesh( rhino.MeshType.Any );
  
  				if ( mesh ) {
  
  					geometry = mesh.toThreejsJSON();
  					mesh.delete();
  
  				}
  
  				break;
  
  			case rhino.ObjectType.TextDot:
  
  				geometry = extractProperties( _geometry );
  
  				break;
  
  			case rhino.ObjectType.Light:
  
  				geometry = extractProperties( _geometry );
  
  				break;
  
  			case rhino.ObjectType.InstanceReference:
  
  				geometry = extractProperties( _geometry );
  				geometry.xform = extractProperties( _geometry.xform );
  				geometry.xform.array = _geometry.xform.toFloatArray( true );
  
  				break;
  
  			case rhino.ObjectType.SubD:
  
  				// TODO: precalculate resulting vertices and faces and warn on excessive results
  				_geometry.subdivide( 3 );
  				var mesh = rhino.Mesh.createFromSubDControlNet( _geometry );
  				if ( mesh ) {
  
  					geometry = mesh.toThreejsJSON();
  					mesh.delete();
  
  				}
  
  				break;
  
  				/*
  				case rhino.ObjectType.Annotation:
  				case rhino.ObjectType.Hatch:
  				case rhino.ObjectType.ClipPlane:
  				*/
  
  			default:
  				console.warn( `THREE.3DMLoader: TODO: Implement ${objectType.constructor.name}` );
  				break;
  
  		}
  
  		if ( Array.isArray( geometry ) === false || geometry.length > 0 ) {
  
  			var attributes = extractProperties( _attributes );
  			attributes.geometry = extractProperties( _geometry );
  
  			if ( _attributes.groupCount > 0 ) {
  
  				attributes.groupIds = _attributes.getGroupList();
  
  			}
  
  			if ( _attributes.userStringCount > 0 ) {
  
  				attributes.userStrings = _attributes.getUserStrings();
  
  			}
  
  			attributes.drawColor = _attributes.drawColor( doc );
  
  			objectType = objectType.constructor.name;
  			objectType = objectType.substring( 11, objectType.length );
  			attributes.geometry.objectType = objectType;
  
  			return { geometry, attributes, objectType };
  
  		} else {
  
  			console.warn( 'THREE.3DMLoader: Object has no mesh geometry. Consider opening this in Rhino, using a shaded display mode, and exporting again.' );
  
  		}
  
  	}
  
  	function extractProperties( object ) {
  
  		var result = {};
  
  		for ( var property in object ) {
  
  			if ( typeof object[ property ] !== 'function' ) {
  
  				result[ property ] = object[ property ];
  
  			} else {
  
  				// console.log( `${property}: ${object[ property ]}` );
  
  			}
  
  		}
  
  		return result;
  
  	}
  
  	function curveToPoints( curve, pointLimit ) {
  
  		var pointCount = pointLimit;
  		var rc = [];
  		var ts = [];
  
  		if ( curve instanceof rhino.LineCurve ) {
  
  			return [ curve.pointAtStart, curve.pointAtEnd ];
  
  		}
  
  		if ( curve instanceof rhino.PolylineCurve ) {
  
  			pointCount = curve.pointCount;
  			for ( var i = 0; i < pointCount; i ++ ) {
  
  				rc.push( curve.point( i ) );
  
  			}
  
  			return rc;
  
  		}
  
  		if ( curve instanceof rhino.PolyCurve ) {
  
  			var segmentCount = curve.segmentCount;
  
  			for ( var i = 0; i < segmentCount; i ++ ) {
  
  				var segment = curve.segmentCurve( i );
  				var segmentArray = curveToPoints( segment, pointCount );
  				rc = rc.concat( segmentArray );
  				segment.delete();
  
  			}
  
  			return rc;
  
  		}
  
  		if ( curve instanceof rhino.ArcCurve ) {
  
  			pointCount = Math.floor( curve.angleDegrees / 5 );
  			pointCount = pointCount < 2 ? 2 : pointCount;
  			// alternative to this hardcoded version: https://stackoverflow.com/a/18499923/2179399
  
  		}
  
  		if ( curve instanceof rhino.NurbsCurve && curve.degree === 1 ) {
  
  			if ( curve.segmentCount === undefined || curve.segmentCount === 1 ) {
  
  				return [ curve.pointAtStart, curve.pointAtEnd ];
  
  			}
  
  		}
  
  		var domain = curve.domain;
  		var divisions = pointCount - 1.0;
  
  		for ( var j = 0; j < pointCount; j ++ ) {
  
  			var t = domain[ 0 ] + ( j / divisions ) * ( domain[ 1 ] - domain[ 0 ] );
  
  			if ( t === domain[ 0 ] || t === domain[ 1 ] ) {
  
  				ts.push( t );
  				continue;
  
  			}
  
  			var tan = curve.tangentAt( t );
  			var prevTan = curve.tangentAt( ts.slice( - 1 )[ 0 ] );
  
  			// Duplicaated from THREE.Vector3
  			// How to pass imports to worker?
  
  			var tS = tan[ 0 ] * tan[ 0 ] + tan[ 1 ] * tan[ 1 ] + tan[ 2 ] * tan[ 2 ];
  			var ptS = prevTan[ 0 ] * prevTan[ 0 ] + prevTan[ 1 ] * prevTan[ 1 ] + prevTan[ 2 ] * prevTan[ 2 ];
  
  			var denominator = Math.sqrt( tS * ptS );
  
  			var angle;
  
  			if ( denominator === 0 ) {
  
  				angle = Math.PI / 2;
  
  			} else {
  
  				var theta = ( tan.x * prevTan.x + tan.y * prevTan.y + tan.z * prevTan.z ) / denominator;
  				angle = Math.acos( Math.max( - 1, Math.min( 1, theta ) ) );
  
  			}
  
  			if ( angle < 0.1 ) continue;
  
  			ts.push( t );
  
  		}
  
  		rc = ts.map( t => curve.pointAt( t ) );
  		return rc;
  
  	}
  
  };
  
  export { Rhino3dmLoader };
  