import { BufferAttribute, ClampToEdgeWrapping, DoubleSide, InterpolateDiscrete, InterpolateLinear, LinearFilter, LinearMipmapLinearFilter, LinearMipmapNearestFilter, MathUtils, Matrix4, MirroredRepeatWrapping, NearestFilter, NearestMipmapLinearFilter, NearestMipmapNearestFilter, PropertyBinding, RGBAFormat, RGBFormat, RepeatWrapping, Scene, Vector3 } from '../../../build/three.module.js'; class GLTFExporter { constructor() { this.pluginCallbacks = []; this.register( function ( writer ) { return new GLTFLightExtension( writer ); } ); this.register( function ( writer ) { return new GLTFMaterialsUnlitExtension( writer ); } ); this.register( function ( writer ) { return new GLTFMaterialsPBRSpecularGlossiness( writer ); } ); } register( callback ) { if ( this.pluginCallbacks.indexOf( callback ) === - 1 ) { this.pluginCallbacks.push( callback ); } return this; } unregister( callback ) { if ( this.pluginCallbacks.indexOf( callback ) !== - 1 ) { this.pluginCallbacks.splice( this.pluginCallbacks.indexOf( callback ), 1 ); } return this; } /** * Parse scenes and generate GLTF output * @param {Scene or [THREE.Scenes]} input Scene or Array of THREE.Scenes * @param {Function} onDone Callback on completed * @param {Object} options options */ parse( input, onDone, options ) { const writer = new GLTFWriter(); const plugins = []; for ( let i = 0, il = this.pluginCallbacks.length; i < il; i ++ ) { plugins.push( this.pluginCallbacks[ i ]( writer ) ); } writer.setPlugins( plugins ); writer.write( input, onDone, options ); } } //------------------------------------------------------------------------------ // Constants //------------------------------------------------------------------------------ const WEBGL_CONSTANTS = { POINTS: 0x0000, LINES: 0x0001, LINE_LOOP: 0x0002, LINE_STRIP: 0x0003, TRIANGLES: 0x0004, TRIANGLE_STRIP: 0x0005, TRIANGLE_FAN: 0x0006, UNSIGNED_BYTE: 0x1401, UNSIGNED_SHORT: 0x1403, FLOAT: 0x1406, UNSIGNED_INT: 0x1405, ARRAY_BUFFER: 0x8892, ELEMENT_ARRAY_BUFFER: 0x8893, NEAREST: 0x2600, LINEAR: 0x2601, NEAREST_MIPMAP_NEAREST: 0x2700, LINEAR_MIPMAP_NEAREST: 0x2701, NEAREST_MIPMAP_LINEAR: 0x2702, LINEAR_MIPMAP_LINEAR: 0x2703, CLAMP_TO_EDGE: 33071, MIRRORED_REPEAT: 33648, REPEAT: 10497 }; const THREE_TO_WEBGL = {}; THREE_TO_WEBGL[ NearestFilter ] = WEBGL_CONSTANTS.NEAREST; THREE_TO_WEBGL[ NearestMipmapNearestFilter ] = WEBGL_CONSTANTS.NEAREST_MIPMAP_NEAREST; THREE_TO_WEBGL[ NearestMipmapLinearFilter ] = WEBGL_CONSTANTS.NEAREST_MIPMAP_LINEAR; THREE_TO_WEBGL[ LinearFilter ] = WEBGL_CONSTANTS.LINEAR; THREE_TO_WEBGL[ LinearMipmapNearestFilter ] = WEBGL_CONSTANTS.LINEAR_MIPMAP_NEAREST; THREE_TO_WEBGL[ LinearMipmapLinearFilter ] = WEBGL_CONSTANTS.LINEAR_MIPMAP_LINEAR; THREE_TO_WEBGL[ ClampToEdgeWrapping ] = WEBGL_CONSTANTS.CLAMP_TO_EDGE; THREE_TO_WEBGL[ RepeatWrapping ] = WEBGL_CONSTANTS.REPEAT; THREE_TO_WEBGL[ MirroredRepeatWrapping ] = WEBGL_CONSTANTS.MIRRORED_REPEAT; const PATH_PROPERTIES = { scale: 'scale', position: 'translation', quaternion: 'rotation', morphTargetInfluences: 'weights' }; // GLB constants // https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#glb-file-format-specification const GLB_HEADER_BYTES = 12; const GLB_HEADER_MAGIC = 0x46546C67; const GLB_VERSION = 2; const GLB_CHUNK_PREFIX_BYTES = 8; const GLB_CHUNK_TYPE_JSON = 0x4E4F534A; const GLB_CHUNK_TYPE_BIN = 0x004E4942; //------------------------------------------------------------------------------ // Utility functions //------------------------------------------------------------------------------ /** * Compare two arrays * @param {Array} array1 Array 1 to compare * @param {Array} array2 Array 2 to compare * @return {Boolean} Returns true if both arrays are equal */ function equalArray( array1, array2 ) { return ( array1.length === array2.length ) && array1.every( function ( element, index ) { return element === array2[ index ]; } ); } /** * Converts a string to an ArrayBuffer. * @param {string} text * @return {ArrayBuffer} */ function stringToArrayBuffer( text ) { if ( window.TextEncoder !== undefined ) { return new TextEncoder().encode( text ).buffer; } const array = new Uint8Array( new ArrayBuffer( text.length ) ); for ( let i = 0, il = text.length; i < il; i ++ ) { const value = text.charCodeAt( i ); // Replacing multi-byte character with space(0x20). array[ i ] = value > 0xFF ? 0x20 : value; } return array.buffer; } /** * Is identity matrix * * @param {Matrix4} matrix * @returns {Boolean} Returns true, if parameter is identity matrix */ function isIdentityMatrix( matrix ) { return equalArray( matrix.elements, [ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 ] ); } /** * Get the min and max vectors from the given attribute * @param {BufferAttribute} attribute Attribute to find the min/max in range from start to start + count * @param {Integer} start * @param {Integer} count * @return {Object} Object containing the `min` and `max` values (As an array of attribute.itemSize components) */ function getMinMax( attribute, start, count ) { const output = { min: new Array( attribute.itemSize ).fill( Number.POSITIVE_INFINITY ), max: new Array( attribute.itemSize ).fill( Number.NEGATIVE_INFINITY ) }; for ( let i = start; i < start + count; i ++ ) { for ( let a = 0; a < attribute.itemSize; a ++ ) { let value; if ( attribute.itemSize > 4 ) { // no support for interleaved data for itemSize > 4 value = attribute.array[ i * attribute.itemSize + a ]; } else { if ( a === 0 ) value = attribute.getX( i ); else if ( a === 1 ) value = attribute.getY( i ); else if ( a === 2 ) value = attribute.getZ( i ); else if ( a === 3 ) value = attribute.getW( i ); } output.min[ a ] = Math.min( output.min[ a ], value ); output.max[ a ] = Math.max( output.max[ a ], value ); } } return output; } /** * Get the required size + padding for a buffer, rounded to the next 4-byte boundary. * https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#data-alignment * * @param {Integer} bufferSize The size the original buffer. * @returns {Integer} new buffer size with required padding. * */ function getPaddedBufferSize( bufferSize ) { return Math.ceil( bufferSize / 4 ) * 4; } /** * Returns a buffer aligned to 4-byte boundary. * * @param {ArrayBuffer} arrayBuffer Buffer to pad * @param {Integer} paddingByte (Optional) * @returns {ArrayBuffer} The same buffer if it's already aligned to 4-byte boundary or a new buffer */ function getPaddedArrayBuffer( arrayBuffer, paddingByte = 0 ) { const paddedLength = getPaddedBufferSize( arrayBuffer.byteLength ); if ( paddedLength !== arrayBuffer.byteLength ) { const array = new Uint8Array( paddedLength ); array.set( new Uint8Array( arrayBuffer ) ); if ( paddingByte !== 0 ) { for ( let i = arrayBuffer.byteLength; i < paddedLength; i ++ ) { array[ i ] = paddingByte; } } return array.buffer; } return arrayBuffer; } let cachedCanvas = null; /** * Writer */ class GLTFWriter { constructor() { this.plugins = []; this.options = {}; this.pending = []; this.buffers = []; this.byteOffset = 0; this.buffers = []; this.nodeMap = new Map(); this.skins = []; this.extensionsUsed = {}; this.uids = new Map(); this.uid = 0; this.json = { asset: { version: '2.0', generator: 'THREE.GLTFExporter' } }; this.cache = { meshes: new Map(), attributes: new Map(), attributesNormalized: new Map(), materials: new Map(), textures: new Map(), images: new Map() }; } setPlugins( plugins ) { this.plugins = plugins; } /** * Parse scenes and generate GLTF output * @param {Scene or [THREE.Scenes]} input Scene or Array of THREE.Scenes * @param {Function} onDone Callback on completed * @param {Object} options options */ write( input, onDone, options ) { this.options = Object.assign( {}, { // default options binary: false, trs: false, onlyVisible: true, truncateDrawRange: true, embedImages: true, maxTextureSize: Infinity, animations: [], includeCustomExtensions: false }, options ); if ( this.options.animations.length > 0 ) { // Only TRS properties, and not matrices, may be targeted by animation. this.options.trs = true; } this.processInput( input ); const writer = this; Promise.all( this.pending ).then( function () { const buffers = writer.buffers; const json = writer.json; const options = writer.options; const extensionsUsed = writer.extensionsUsed; // Merge buffers. const blob = new Blob( buffers, { type: 'application/octet-stream' } ); // Declare extensions. const extensionsUsedList = Object.keys( extensionsUsed ); if ( extensionsUsedList.length > 0 ) json.extensionsUsed = extensionsUsedList; // Update bytelength of the single buffer. if ( json.buffers && json.buffers.length > 0 ) json.buffers[ 0 ].byteLength = blob.size; if ( options.binary === true ) { // https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#glb-file-format-specification const reader = new window.FileReader(); reader.readAsArrayBuffer( blob ); reader.onloadend = function () { // Binary chunk. const binaryChunk = getPaddedArrayBuffer( reader.result ); const binaryChunkPrefix = new DataView( new ArrayBuffer( GLB_CHUNK_PREFIX_BYTES ) ); binaryChunkPrefix.setUint32( 0, binaryChunk.byteLength, true ); binaryChunkPrefix.setUint32( 4, GLB_CHUNK_TYPE_BIN, true ); // JSON chunk. const jsonChunk = getPaddedArrayBuffer( stringToArrayBuffer( JSON.stringify( json ) ), 0x20 ); const jsonChunkPrefix = new DataView( new ArrayBuffer( GLB_CHUNK_PREFIX_BYTES ) ); jsonChunkPrefix.setUint32( 0, jsonChunk.byteLength, true ); jsonChunkPrefix.setUint32( 4, GLB_CHUNK_TYPE_JSON, true ); // GLB header. const header = new ArrayBuffer( GLB_HEADER_BYTES ); const headerView = new DataView( header ); headerView.setUint32( 0, GLB_HEADER_MAGIC, true ); headerView.setUint32( 4, GLB_VERSION, true ); const totalByteLength = GLB_HEADER_BYTES + jsonChunkPrefix.byteLength + jsonChunk.byteLength + binaryChunkPrefix.byteLength + binaryChunk.byteLength; headerView.setUint32( 8, totalByteLength, true ); const glbBlob = new Blob( [ header, jsonChunkPrefix, jsonChunk, binaryChunkPrefix, binaryChunk ], { type: 'application/octet-stream' } ); const glbReader = new window.FileReader(); glbReader.readAsArrayBuffer( glbBlob ); glbReader.onloadend = function () { onDone( glbReader.result ); }; }; } else { if ( json.buffers && json.buffers.length > 0 ) { const reader = new window.FileReader(); reader.readAsDataURL( blob ); reader.onloadend = function () { const base64data = reader.result; json.buffers[ 0 ].uri = base64data; onDone( json ); }; } else { onDone( json ); } } } ); } /** * Serializes a userData. * * @param {THREE.Object3D|THREE.Material} object * @param {Object} objectDef */ serializeUserData( object, objectDef ) { if ( Object.keys( object.userData ).length === 0 ) return; const options = this.options; const extensionsUsed = this.extensionsUsed; try { const json = JSON.parse( JSON.stringify( object.userData ) ); if ( options.includeCustomExtensions && json.gltfExtensions ) { if ( objectDef.extensions === undefined ) objectDef.extensions = {}; for ( const extensionName in json.gltfExtensions ) { objectDef.extensions[ extensionName ] = json.gltfExtensions[ extensionName ]; extensionsUsed[ extensionName ] = true; } delete json.gltfExtensions; } if ( Object.keys( json ).length > 0 ) objectDef.extras = json; } catch ( error ) { console.warn( 'THREE.GLTFExporter: userData of \'' + object.name + '\' ' + 'won\'t be serialized because of JSON.stringify error - ' + error.message ); } } /** * Assign and return a temporal unique id for an object * especially which doesn't have .uuid * @param {Object} object * @return {Integer} */ getUID( object ) { if ( ! this.uids.has( object ) ) this.uids.set( object, this.uid ++ ); return this.uids.get( object ); } /** * Checks if normal attribute values are normalized. * * @param {BufferAttribute} normal * @returns {Boolean} */ isNormalizedNormalAttribute( normal ) { const cache = this.cache; if ( cache.attributesNormalized.has( normal ) ) return false; const v = new Vector3(); for ( let i = 0, il = normal.count; i < il; i ++ ) { // 0.0005 is from glTF-validator if ( Math.abs( v.fromBufferAttribute( normal, i ).length() - 1.0 ) > 0.0005 ) return false; } return true; } /** * Creates normalized normal buffer attribute. * * @param {BufferAttribute} normal * @returns {BufferAttribute} * */ createNormalizedNormalAttribute( normal ) { const cache = this.cache; if ( cache.attributesNormalized.has( normal ) ) return cache.attributesNormalized.get( normal ); const attribute = normal.clone(); const v = new Vector3(); for ( let i = 0, il = attribute.count; i < il; i ++ ) { v.fromBufferAttribute( attribute, i ); if ( v.x === 0 && v.y === 0 && v.z === 0 ) { // if values can't be normalized set (1, 0, 0) v.setX( 1.0 ); } else { v.normalize(); } attribute.setXYZ( i, v.x, v.y, v.z ); } cache.attributesNormalized.set( normal, attribute ); return attribute; } /** * Applies a texture transform, if present, to the map definition. Requires * the KHR_texture_transform extension. * * @param {Object} mapDef * @param {THREE.Texture} texture */ applyTextureTransform( mapDef, texture ) { let didTransform = false; const transformDef = {}; if ( texture.offset.x !== 0 || texture.offset.y !== 0 ) { transformDef.offset = texture.offset.toArray(); didTransform = true; } if ( texture.rotation !== 0 ) { transformDef.rotation = texture.rotation; didTransform = true; } if ( texture.repeat.x !== 1 || texture.repeat.y !== 1 ) { transformDef.scale = texture.repeat.toArray(); didTransform = true; } if ( didTransform ) { mapDef.extensions = mapDef.extensions || {}; mapDef.extensions[ 'KHR_texture_transform' ] = transformDef; this.extensionsUsed[ 'KHR_texture_transform' ] = true; } } /** * Process a buffer to append to the default one. * @param {ArrayBuffer} buffer * @return {Integer} */ processBuffer( buffer ) { const json = this.json; const buffers = this.buffers; if ( ! json.buffers ) json.buffers = [ { byteLength: 0 } ]; // All buffers are merged before export. buffers.push( buffer ); return 0; } /** * Process and generate a BufferView * @param {BufferAttribute} attribute * @param {number} componentType * @param {number} start * @param {number} count * @param {number} target (Optional) Target usage of the BufferView * @return {Object} */ processBufferView( attribute, componentType, start, count, target ) { const json = this.json; if ( ! json.bufferViews ) json.bufferViews = []; // Create a new dataview and dump the attribute's array into it let componentSize; if ( componentType === WEBGL_CONSTANTS.UNSIGNED_BYTE ) { componentSize = 1; } else if ( componentType === WEBGL_CONSTANTS.UNSIGNED_SHORT ) { componentSize = 2; } else { componentSize = 4; } const byteLength = getPaddedBufferSize( count * attribute.itemSize * componentSize ); const dataView = new DataView( new ArrayBuffer( byteLength ) ); let offset = 0; for ( let i = start; i < start + count; i ++ ) { for ( let a = 0; a < attribute.itemSize; a ++ ) { let value; if ( attribute.itemSize > 4 ) { // no support for interleaved data for itemSize > 4 value = attribute.array[ i * attribute.itemSize + a ]; } else { if ( a === 0 ) value = attribute.getX( i ); else if ( a === 1 ) value = attribute.getY( i ); else if ( a === 2 ) value = attribute.getZ( i ); else if ( a === 3 ) value = attribute.getW( i ); } if ( componentType === WEBGL_CONSTANTS.FLOAT ) { dataView.setFloat32( offset, value, true ); } else if ( componentType === WEBGL_CONSTANTS.UNSIGNED_INT ) { dataView.setUint32( offset, value, true ); } else if ( componentType === WEBGL_CONSTANTS.UNSIGNED_SHORT ) { dataView.setUint16( offset, value, true ); } else if ( componentType === WEBGL_CONSTANTS.UNSIGNED_BYTE ) { dataView.setUint8( offset, value ); } offset += componentSize; } } const bufferViewDef = { buffer: this.processBuffer( dataView.buffer ), byteOffset: this.byteOffset, byteLength: byteLength }; if ( target !== undefined ) bufferViewDef.target = target; if ( target === WEBGL_CONSTANTS.ARRAY_BUFFER ) { // Only define byteStride for vertex attributes. bufferViewDef.byteStride = attribute.itemSize * componentSize; } this.byteOffset += byteLength; json.bufferViews.push( bufferViewDef ); // @TODO Merge bufferViews where possible. const output = { id: json.bufferViews.length - 1, byteLength: 0 }; return output; } /** * Process and generate a BufferView from an image Blob. * @param {Blob} blob * @return {Promise} */ processBufferViewImage( blob ) { const writer = this; const json = writer.json; if ( ! json.bufferViews ) json.bufferViews = []; return new Promise( function ( resolve ) { const reader = new window.FileReader(); reader.readAsArrayBuffer( blob ); reader.onloadend = function () { const buffer = getPaddedArrayBuffer( reader.result ); const bufferViewDef = { buffer: writer.processBuffer( buffer ), byteOffset: writer.byteOffset, byteLength: buffer.byteLength }; writer.byteOffset += buffer.byteLength; resolve( json.bufferViews.push( bufferViewDef ) - 1 ); }; } ); } /** * Process attribute to generate an accessor * @param {BufferAttribute} attribute Attribute to process * @param {THREE.BufferGeometry} geometry (Optional) Geometry used for truncated draw range * @param {Integer} start (Optional) * @param {Integer} count (Optional) * @return {Integer|null} Index of the processed accessor on the "accessors" array */ processAccessor( attribute, geometry, start, count ) { const options = this.options; const json = this.json; const types = { 1: 'SCALAR', 2: 'VEC2', 3: 'VEC3', 4: 'VEC4', 16: 'MAT4' }; let componentType; // Detect the component type of the attribute array (float, uint or ushort) if ( attribute.array.constructor === Float32Array ) { componentType = WEBGL_CONSTANTS.FLOAT; } else if ( attribute.array.constructor === Uint32Array ) { componentType = WEBGL_CONSTANTS.UNSIGNED_INT; } else if ( attribute.array.constructor === Uint16Array ) { componentType = WEBGL_CONSTANTS.UNSIGNED_SHORT; } else if ( attribute.array.constructor === Uint8Array ) { componentType = WEBGL_CONSTANTS.UNSIGNED_BYTE; } else { throw new Error( 'THREE.GLTFExporter: Unsupported bufferAttribute component type.' ); } if ( start === undefined ) start = 0; if ( count === undefined ) count = attribute.count; // @TODO Indexed buffer geometry with drawRange not supported yet if ( options.truncateDrawRange && geometry !== undefined && geometry.index === null ) { const end = start + count; const end2 = geometry.drawRange.count === Infinity ? attribute.count : geometry.drawRange.start + geometry.drawRange.count; start = Math.max( start, geometry.drawRange.start ); count = Math.min( end, end2 ) - start; if ( count < 0 ) count = 0; } // Skip creating an accessor if the attribute doesn't have data to export if ( count === 0 ) return null; const minMax = getMinMax( attribute, start, count ); let bufferViewTarget; // If geometry isn't provided, don't infer the target usage of the bufferView. For // animation samplers, target must not be set. if ( geometry !== undefined ) { bufferViewTarget = attribute === geometry.index ? WEBGL_CONSTANTS.ELEMENT_ARRAY_BUFFER : WEBGL_CONSTANTS.ARRAY_BUFFER; } const bufferView = this.processBufferView( attribute, componentType, start, count, bufferViewTarget ); const accessorDef = { bufferView: bufferView.id, byteOffset: bufferView.byteOffset, componentType: componentType, count: count, max: minMax.max, min: minMax.min, type: types[ attribute.itemSize ] }; if ( attribute.normalized === true ) accessorDef.normalized = true; if ( ! json.accessors ) json.accessors = []; return json.accessors.push( accessorDef ) - 1; } /** * Process image * @param {Image} image to process * @param {Integer} format of the image (e.g. RGBFormat, RGBAFormat etc) * @param {Boolean} flipY before writing out the image * @return {Integer} Index of the processed texture in the "images" array */ processImage( image, format, flipY ) { const writer = this; const cache = writer.cache; const json = writer.json; const options = writer.options; const pending = writer.pending; if ( ! cache.images.has( image ) ) cache.images.set( image, {} ); const cachedImages = cache.images.get( image ); const mimeType = format === RGBAFormat ? 'image/png' : 'image/jpeg'; const key = mimeType + ':flipY/' + flipY.toString(); if ( cachedImages[ key ] !== undefined ) return cachedImages[ key ]; if ( ! json.images ) json.images = []; const imageDef = { mimeType: mimeType }; if ( options.embedImages ) { const canvas = cachedCanvas = cachedCanvas || document.createElement( 'canvas' ); canvas.width = Math.min( image.width, options.maxTextureSize ); canvas.height = Math.min( image.height, options.maxTextureSize ); const ctx = canvas.getContext( '2d' ); if ( flipY === true ) { ctx.translate( 0, canvas.height ); ctx.scale( 1, - 1 ); } if ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) || ( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) || ( typeof OffscreenCanvas !== 'undefined' && image instanceof OffscreenCanvas ) || ( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) { ctx.drawImage( image, 0, 0, canvas.width, canvas.height ); } else { if ( format !== RGBAFormat && format !== RGBFormat ) { console.error( 'GLTFExporter: Only RGB and RGBA formats are supported.' ); } if ( image.width > options.maxTextureSize || image.height > options.maxTextureSize ) { console.warn( 'GLTFExporter: Image size is bigger than maxTextureSize', image ); } const data = new Uint8ClampedArray( image.height * image.width * 4 ); if ( format === RGBAFormat ) { for ( let i = 0; i < data.length; i += 4 ) { data[ i + 0 ] = image.data[ i + 0 ]; data[ i + 1 ] = image.data[ i + 1 ]; data[ i + 2 ] = image.data[ i + 2 ]; data[ i + 3 ] = image.data[ i + 3 ]; } } else { for ( let i = 0, j = 0; i < data.length; i += 4, j += 3 ) { data[ i + 0 ] = image.data[ j + 0 ]; data[ i + 1 ] = image.data[ j + 1 ]; data[ i + 2 ] = image.data[ j + 2 ]; data[ i + 3 ] = 255; } } ctx.putImageData( new ImageData( data, image.width, image.height ), 0, 0 ); } if ( options.binary === true ) { pending.push( new Promise( function ( resolve ) { canvas.toBlob( function ( blob ) { writer.processBufferViewImage( blob ).then( function ( bufferViewIndex ) { imageDef.bufferView = bufferViewIndex; resolve(); } ); }, mimeType ); } ) ); } else { imageDef.uri = canvas.toDataURL( mimeType ); } } else { imageDef.uri = image.src; } const index = json.images.push( imageDef ) - 1; cachedImages[ key ] = index; return index; } /** * Process sampler * @param {Texture} map Texture to process * @return {Integer} Index of the processed texture in the "samplers" array */ processSampler( map ) { const json = this.json; if ( ! json.samplers ) json.samplers = []; const samplerDef = { magFilter: THREE_TO_WEBGL[ map.magFilter ], minFilter: THREE_TO_WEBGL[ map.minFilter ], wrapS: THREE_TO_WEBGL[ map.wrapS ], wrapT: THREE_TO_WEBGL[ map.wrapT ] }; return json.samplers.push( samplerDef ) - 1; } /** * Process texture * @param {Texture} map Map to process * @return {Integer} Index of the processed texture in the "textures" array */ processTexture( map ) { const cache = this.cache; const json = this.json; if ( cache.textures.has( map ) ) return cache.textures.get( map ); if ( ! json.textures ) json.textures = []; const textureDef = { sampler: this.processSampler( map ), source: this.processImage( map.image, map.format, map.flipY ) }; if ( map.name ) textureDef.name = map.name; this._invokeAll( function ( ext ) { ext.writeTexture && ext.writeTexture( map, textureDef ); } ); const index = json.textures.push( textureDef ) - 1; cache.textures.set( map, index ); return index; } /** * Process material * @param {THREE.Material} material Material to process * @return {Integer|null} Index of the processed material in the "materials" array */ processMaterial( material ) { const cache = this.cache; const json = this.json; if ( cache.materials.has( material ) ) return cache.materials.get( material ); if ( material.isShaderMaterial ) { console.warn( 'GLTFExporter: THREE.ShaderMaterial not supported.' ); return null; } if ( ! json.materials ) json.materials = []; // @QUESTION Should we avoid including any attribute that has the default value? const materialDef = { pbrMetallicRoughness: {} }; if ( material.isMeshStandardMaterial !== true && material.isMeshBasicMaterial !== true ) { console.warn( 'GLTFExporter: Use MeshStandardMaterial or MeshBasicMaterial for best results.' ); } // pbrMetallicRoughness.baseColorFactor const color = material.color.toArray().concat( [ material.opacity ] ); if ( ! equalArray( color, [ 1, 1, 1, 1 ] ) ) { materialDef.pbrMetallicRoughness.baseColorFactor = color; } if ( material.isMeshStandardMaterial ) { materialDef.pbrMetallicRoughness.metallicFactor = material.metalness; materialDef.pbrMetallicRoughness.roughnessFactor = material.roughness; } else { materialDef.pbrMetallicRoughness.metallicFactor = 0.5; materialDef.pbrMetallicRoughness.roughnessFactor = 0.5; } // pbrMetallicRoughness.metallicRoughnessTexture if ( material.metalnessMap || material.roughnessMap ) { if ( material.metalnessMap === material.roughnessMap ) { const metalRoughMapDef = { index: this.processTexture( material.metalnessMap ) }; this.applyTextureTransform( metalRoughMapDef, material.metalnessMap ); materialDef.pbrMetallicRoughness.metallicRoughnessTexture = metalRoughMapDef; } else { console.warn( 'THREE.GLTFExporter: Ignoring metalnessMap and roughnessMap because they are not the same Texture.' ); } } // pbrMetallicRoughness.baseColorTexture or pbrSpecularGlossiness diffuseTexture if ( material.map ) { const baseColorMapDef = { index: this.processTexture( material.map ) }; this.applyTextureTransform( baseColorMapDef, material.map ); materialDef.pbrMetallicRoughness.baseColorTexture = baseColorMapDef; } if ( material.emissive ) { // note: emissive components are limited to stay within the 0 - 1 range to accommodate glTF spec. see #21849 and #22000. const emissive = material.emissive.clone().multiplyScalar( material.emissiveIntensity ); const maxEmissiveComponent = Math.max( emissive.r, emissive.g, emissive.b ); if ( maxEmissiveComponent > 1 ) { emissive.multiplyScalar( 1 / maxEmissiveComponent ); console.warn( 'THREE.GLTFExporter: Some emissive components exceed 1; emissive has been limited' ); } if ( maxEmissiveComponent > 0 ) { materialDef.emissiveFactor = emissive.toArray(); } // emissiveTexture if ( material.emissiveMap ) { const emissiveMapDef = { index: this.processTexture( material.emissiveMap ) }; this.applyTextureTransform( emissiveMapDef, material.emissiveMap ); materialDef.emissiveTexture = emissiveMapDef; } } // normalTexture if ( material.normalMap ) { const normalMapDef = { index: this.processTexture( material.normalMap ) }; if ( material.normalScale && material.normalScale.x !== - 1 ) { if ( material.normalScale.x !== material.normalScale.y ) { console.warn( 'THREE.GLTFExporter: Normal scale components are different, ignoring Y and exporting X.' ); } normalMapDef.scale = material.normalScale.x; } this.applyTextureTransform( normalMapDef, material.normalMap ); materialDef.normalTexture = normalMapDef; } // occlusionTexture if ( material.aoMap ) { const occlusionMapDef = { index: this.processTexture( material.aoMap ), texCoord: 1 }; if ( material.aoMapIntensity !== 1.0 ) { occlusionMapDef.strength = material.aoMapIntensity; } this.applyTextureTransform( occlusionMapDef, material.aoMap ); materialDef.occlusionTexture = occlusionMapDef; } // alphaMode if ( material.transparent ) { materialDef.alphaMode = 'BLEND'; } else { if ( material.alphaTest > 0.0 ) { materialDef.alphaMode = 'MASK'; materialDef.alphaCutoff = material.alphaTest; } } // doubleSided if ( material.side === DoubleSide ) materialDef.doubleSided = true; if ( material.name !== '' ) materialDef.name = material.name; this.serializeUserData( material, materialDef ); this._invokeAll( function ( ext ) { ext.writeMaterial && ext.writeMaterial( material, materialDef ); } ); const index = json.materials.push( materialDef ) - 1; cache.materials.set( material, index ); return index; } /** * Process mesh * @param {THREE.Mesh} mesh Mesh to process * @return {Integer|null} Index of the processed mesh in the "meshes" array */ processMesh( mesh ) { const cache = this.cache; const json = this.json; const meshCacheKeyParts = [ mesh.geometry.uuid ]; if ( Array.isArray( mesh.material ) ) { for ( let i = 0, l = mesh.material.length; i < l; i ++ ) { meshCacheKeyParts.push( mesh.material[ i ].uuid ); } } else { meshCacheKeyParts.push( mesh.material.uuid ); } const meshCacheKey = meshCacheKeyParts.join( ':' ); if ( cache.meshes.has( meshCacheKey ) ) return cache.meshes.get( meshCacheKey ); const geometry = mesh.geometry; let mode; // Use the correct mode if ( mesh.isLineSegments ) { mode = WEBGL_CONSTANTS.LINES; } else if ( mesh.isLineLoop ) { mode = WEBGL_CONSTANTS.LINE_LOOP; } else if ( mesh.isLine ) { mode = WEBGL_CONSTANTS.LINE_STRIP; } else if ( mesh.isPoints ) { mode = WEBGL_CONSTANTS.POINTS; } else { mode = mesh.material.wireframe ? WEBGL_CONSTANTS.LINES : WEBGL_CONSTANTS.TRIANGLES; } if ( geometry.isBufferGeometry !== true ) { throw new Error( 'THREE.GLTFExporter: Geometry is not of type THREE.BufferGeometry.' ); } const meshDef = {}; const attributes = {}; const primitives = []; const targets = []; // Conversion between attributes names in threejs and gltf spec const nameConversion = { uv: 'TEXCOORD_0', uv2: 'TEXCOORD_1', color: 'COLOR_0', skinWeight: 'WEIGHTS_0', skinIndex: 'JOINTS_0' }; const originalNormal = geometry.getAttribute( 'normal' ); if ( originalNormal !== undefined && ! this.isNormalizedNormalAttribute( originalNormal ) ) { console.warn( 'THREE.GLTFExporter: Creating normalized normal attribute from the non-normalized one.' ); geometry.setAttribute( 'normal', this.createNormalizedNormalAttribute( originalNormal ) ); } // @QUESTION Detect if .vertexColors = true? // For every attribute create an accessor let modifiedAttribute = null; for ( let attributeName in geometry.attributes ) { // Ignore morph target attributes, which are exported later. if ( attributeName.substr( 0, 5 ) === 'morph' ) continue; const attribute = geometry.attributes[ attributeName ]; attributeName = nameConversion[ attributeName ] || attributeName.toUpperCase(); // Prefix all geometry attributes except the ones specifically // listed in the spec; non-spec attributes are considered custom. const validVertexAttributes = /^(POSITION|NORMAL|TANGENT|TEXCOORD_\d+|COLOR_\d+|JOINTS_\d+|WEIGHTS_\d+)$/; if ( ! validVertexAttributes.test( attributeName ) ) attributeName = '_' + attributeName; if ( cache.attributes.has( this.getUID( attribute ) ) ) { attributes[ attributeName ] = cache.attributes.get( this.getUID( attribute ) ); continue; } // JOINTS_0 must be UNSIGNED_BYTE or UNSIGNED_SHORT. modifiedAttribute = null; const array = attribute.array; if ( attributeName === 'JOINTS_0' && ! ( array instanceof Uint16Array ) && ! ( array instanceof Uint8Array ) ) { console.warn( 'GLTFExporter: Attribute "skinIndex" converted to type UNSIGNED_SHORT.' ); modifiedAttribute = new BufferAttribute( new Uint16Array( array ), attribute.itemSize, attribute.normalized ); } const accessor = this.processAccessor( modifiedAttribute || attribute, geometry ); if ( accessor !== null ) { attributes[ attributeName ] = accessor; cache.attributes.set( this.getUID( attribute ), accessor ); } } if ( originalNormal !== undefined ) geometry.setAttribute( 'normal', originalNormal ); // Skip if no exportable attributes found if ( Object.keys( attributes ).length === 0 ) return null; // Morph targets if ( mesh.morphTargetInfluences !== undefined && mesh.morphTargetInfluences.length > 0 ) { const weights = []; const targetNames = []; const reverseDictionary = {}; if ( mesh.morphTargetDictionary !== undefined ) { for ( const key in mesh.morphTargetDictionary ) { reverseDictionary[ mesh.morphTargetDictionary[ key ] ] = key; } } for ( let i = 0; i < mesh.morphTargetInfluences.length; ++ i ) { const target = {}; let warned = false; for ( const attributeName in geometry.morphAttributes ) { // glTF 2.0 morph supports only POSITION/NORMAL/TANGENT. // Three.js doesn't support TANGENT yet. if ( attributeName !== 'position' && attributeName !== 'normal' ) { if ( ! warned ) { console.warn( 'GLTFExporter: Only POSITION and NORMAL morph are supported.' ); warned = true; } continue; } const attribute = geometry.morphAttributes[ attributeName ][ i ]; const gltfAttributeName = attributeName.toUpperCase(); // Three.js morph attribute has absolute values while the one of glTF has relative values. // // glTF 2.0 Specification: // https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#morph-targets const baseAttribute = geometry.attributes[ attributeName ]; if ( cache.attributes.has( this.getUID( attribute ) ) ) { target[ gltfAttributeName ] = cache.attributes.get( this.getUID( attribute ) ); continue; } // Clones attribute not to override const relativeAttribute = attribute.clone(); if ( ! geometry.morphTargetsRelative ) { for ( let j = 0, jl = attribute.count; j < jl; j ++ ) { relativeAttribute.setXYZ( j, attribute.getX( j ) - baseAttribute.getX( j ), attribute.getY( j ) - baseAttribute.getY( j ), attribute.getZ( j ) - baseAttribute.getZ( j ) ); } } target[ gltfAttributeName ] = this.processAccessor( relativeAttribute, geometry ); cache.attributes.set( this.getUID( baseAttribute ), target[ gltfAttributeName ] ); } targets.push( target ); weights.push( mesh.morphTargetInfluences[ i ] ); if ( mesh.morphTargetDictionary !== undefined ) targetNames.push( reverseDictionary[ i ] ); } meshDef.weights = weights; if ( targetNames.length > 0 ) { meshDef.extras = {}; meshDef.extras.targetNames = targetNames; } } const isMultiMaterial = Array.isArray( mesh.material ); if ( isMultiMaterial && geometry.groups.length === 0 ) return null; const materials = isMultiMaterial ? mesh.material : [ mesh.material ]; const groups = isMultiMaterial ? geometry.groups : [ { materialIndex: 0, start: undefined, count: undefined } ]; for ( let i = 0, il = groups.length; i < il; i ++ ) { const primitive = { mode: mode, attributes: attributes, }; this.serializeUserData( geometry, primitive ); if ( targets.length > 0 ) primitive.targets = targets; if ( geometry.index !== null ) { let cacheKey = this.getUID( geometry.index ); if ( groups[ i ].start !== undefined || groups[ i ].count !== undefined ) { cacheKey += ':' + groups[ i ].start + ':' + groups[ i ].count; } if ( cache.attributes.has( cacheKey ) ) { primitive.indices = cache.attributes.get( cacheKey ); } else { primitive.indices = this.processAccessor( geometry.index, geometry, groups[ i ].start, groups[ i ].count ); cache.attributes.set( cacheKey, primitive.indices ); } if ( primitive.indices === null ) delete primitive.indices; } const material = this.processMaterial( materials[ groups[ i ].materialIndex ] ); if ( material !== null ) primitive.material = material; primitives.push( primitive ); } meshDef.primitives = primitives; if ( ! json.meshes ) json.meshes = []; this._invokeAll( function ( ext ) { ext.writeMesh && ext.writeMesh( mesh, meshDef ); } ); const index = json.meshes.push( meshDef ) - 1; cache.meshes.set( meshCacheKey, index ); return index; } /** * Process camera * @param {THREE.Camera} camera Camera to process * @return {Integer} Index of the processed mesh in the "camera" array */ processCamera( camera ) { const json = this.json; if ( ! json.cameras ) json.cameras = []; const isOrtho = camera.isOrthographicCamera; const cameraDef = { type: isOrtho ? 'orthographic' : 'perspective' }; if ( isOrtho ) { cameraDef.orthographic = { xmag: camera.right * 2, ymag: camera.top * 2, zfar: camera.far <= 0 ? 0.001 : camera.far, znear: camera.near < 0 ? 0 : camera.near }; } else { cameraDef.perspective = { aspectRatio: camera.aspect, yfov: MathUtils.degToRad( camera.fov ), zfar: camera.far <= 0 ? 0.001 : camera.far, znear: camera.near < 0 ? 0 : camera.near }; } // Question: Is saving "type" as name intentional? if ( camera.name !== '' ) cameraDef.name = camera.type; return json.cameras.push( cameraDef ) - 1; } /** * Creates glTF animation entry from AnimationClip object. * * Status: * - Only properties listed in PATH_PROPERTIES may be animated. * * @param {THREE.AnimationClip} clip * @param {THREE.Object3D} root * @return {number|null} */ processAnimation( clip, root ) { const json = this.json; const nodeMap = this.nodeMap; if ( ! json.animations ) json.animations = []; clip = GLTFExporter.Utils.mergeMorphTargetTracks( clip.clone(), root ); const tracks = clip.tracks; const channels = []; const samplers = []; for ( let i = 0; i < tracks.length; ++ i ) { const track = tracks[ i ]; const trackBinding = PropertyBinding.parseTrackName( track.name ); let trackNode = PropertyBinding.findNode( root, trackBinding.nodeName ); const trackProperty = PATH_PROPERTIES[ trackBinding.propertyName ]; if ( trackBinding.objectName === 'bones' ) { if ( trackNode.isSkinnedMesh === true ) { trackNode = trackNode.skeleton.getBoneByName( trackBinding.objectIndex ); } else { trackNode = undefined; } } if ( ! trackNode || ! trackProperty ) { console.warn( 'THREE.GLTFExporter: Could not export animation track "%s".', track.name ); return null; } const inputItemSize = 1; let outputItemSize = track.values.length / track.times.length; if ( trackProperty === PATH_PROPERTIES.morphTargetInfluences ) { outputItemSize /= trackNode.morphTargetInfluences.length; } let interpolation; // @TODO export CubicInterpolant(InterpolateSmooth) as CUBICSPLINE // Detecting glTF cubic spline interpolant by checking factory method's special property // GLTFCubicSplineInterpolant is a custom interpolant and track doesn't return // valid value from .getInterpolation(). if ( track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline === true ) { interpolation = 'CUBICSPLINE'; // itemSize of CUBICSPLINE keyframe is 9 // (VEC3 * 3: inTangent, splineVertex, and outTangent) // but needs to be stored as VEC3 so dividing by 3 here. outputItemSize /= 3; } else if ( track.getInterpolation() === InterpolateDiscrete ) { interpolation = 'STEP'; } else { interpolation = 'LINEAR'; } samplers.push( { input: this.processAccessor( new BufferAttribute( track.times, inputItemSize ) ), output: this.processAccessor( new BufferAttribute( track.values, outputItemSize ) ), interpolation: interpolation } ); channels.push( { sampler: samplers.length - 1, target: { node: nodeMap.get( trackNode ), path: trackProperty } } ); } json.animations.push( { name: clip.name || 'clip_' + json.animations.length, samplers: samplers, channels: channels } ); return json.animations.length - 1; } /** * @param {THREE.Object3D} object * @return {number|null} */ processSkin( object ) { const json = this.json; const nodeMap = this.nodeMap; const node = json.nodes[ nodeMap.get( object ) ]; const skeleton = object.skeleton; if ( skeleton === undefined ) return null; const rootJoint = object.skeleton.bones[ 0 ]; if ( rootJoint === undefined ) return null; const joints = []; const inverseBindMatrices = new Float32Array( skeleton.bones.length * 16 ); const temporaryBoneInverse = new Matrix4(); for ( let i = 0; i < skeleton.bones.length; ++ i ) { joints.push( nodeMap.get( skeleton.bones[ i ] ) ); temporaryBoneInverse.copy( skeleton.boneInverses[ i ] ); temporaryBoneInverse.multiply( object.bindMatrix ).toArray( inverseBindMatrices, i * 16 ); } if ( json.skins === undefined ) json.skins = []; json.skins.push( { inverseBindMatrices: this.processAccessor( new BufferAttribute( inverseBindMatrices, 16 ) ), joints: joints, skeleton: nodeMap.get( rootJoint ) } ); const skinIndex = node.skin = json.skins.length - 1; return skinIndex; } /** * Process Object3D node * @param {THREE.Object3D} node Object3D to processNode * @return {Integer} Index of the node in the nodes list */ processNode( object ) { const json = this.json; const options = this.options; const nodeMap = this.nodeMap; if ( ! json.nodes ) json.nodes = []; const nodeDef = {}; if ( options.trs ) { const rotation = object.quaternion.toArray(); const position = object.position.toArray(); const scale = object.scale.toArray(); if ( ! equalArray( rotation, [ 0, 0, 0, 1 ] ) ) { nodeDef.rotation = rotation; } if ( ! equalArray( position, [ 0, 0, 0 ] ) ) { nodeDef.translation = position; } if ( ! equalArray( scale, [ 1, 1, 1 ] ) ) { nodeDef.scale = scale; } } else { if ( object.matrixAutoUpdate ) { object.updateMatrix(); } if ( isIdentityMatrix( object.matrix ) === false ) { nodeDef.matrix = object.matrix.elements; } } // We don't export empty strings name because it represents no-name in Three.js. if ( object.name !== '' ) nodeDef.name = String( object.name ); this.serializeUserData( object, nodeDef ); if ( object.isMesh || object.isLine || object.isPoints ) { const meshIndex = this.processMesh( object ); if ( meshIndex !== null ) nodeDef.mesh = meshIndex; } else if ( object.isCamera ) { nodeDef.camera = this.processCamera( object ); } if ( object.isSkinnedMesh ) this.skins.push( object ); if ( object.children.length > 0 ) { const children = []; for ( let i = 0, l = object.children.length; i < l; i ++ ) { const child = object.children[ i ]; if ( child.visible || options.onlyVisible === false ) { const nodeIndex = this.processNode( child ); if ( nodeIndex !== null ) children.push( nodeIndex ); } } if ( children.length > 0 ) nodeDef.children = children; } this._invokeAll( function ( ext ) { ext.writeNode && ext.writeNode( object, nodeDef ); } ); const nodeIndex = json.nodes.push( nodeDef ) - 1; nodeMap.set( object, nodeIndex ); return nodeIndex; } /** * Process Scene * @param {Scene} node Scene to process */ processScene( scene ) { const json = this.json; const options = this.options; if ( ! json.scenes ) { json.scenes = []; json.scene = 0; } const sceneDef = {}; if ( scene.name !== '' ) sceneDef.name = scene.name; json.scenes.push( sceneDef ); const nodes = []; for ( let i = 0, l = scene.children.length; i < l; i ++ ) { const child = scene.children[ i ]; if ( child.visible || options.onlyVisible === false ) { const nodeIndex = this.processNode( child ); if ( nodeIndex !== null ) nodes.push( nodeIndex ); } } if ( nodes.length > 0 ) sceneDef.nodes = nodes; this.serializeUserData( scene, sceneDef ); } /** * Creates a Scene to hold a list of objects and parse it * @param {Array} objects List of objects to process */ processObjects( objects ) { const scene = new Scene(); scene.name = 'AuxScene'; for ( let i = 0; i < objects.length; i ++ ) { const object = objects[ i ]; // We push directly to children instead of calling `add` to prevent // modify the .parent and break its original scene and hierarchy if ( object.isGroup ) { scene.children.push( ...object.children ); } else { scene.children.push( object ); } } this.processScene( scene ); } /** * @param {THREE.Object3D|Array} input */ processInput( input ) { const options = this.options; input = input instanceof Array ? input : [ input ]; this._invokeAll( function ( ext ) { ext.beforeParse && ext.beforeParse( input ); } ); const objectsWithoutScene = []; for ( let i = 0; i < input.length; i ++ ) { if ( input[ i ] instanceof Scene ) { this.processScene( input[ i ] ); } else { objectsWithoutScene.push( input[ i ] ); } } if ( objectsWithoutScene.length > 0 ) this.processObjects( objectsWithoutScene ); for ( let i = 0; i < this.skins.length; ++ i ) { this.processSkin( this.skins[ i ] ); } for ( let i = 0; i < options.animations.length; ++ i ) { this.processAnimation( options.animations[ i ], input[ 0 ] ); } this._invokeAll( function ( ext ) { ext.afterParse && ext.afterParse( input ); } ); } _invokeAll( func ) { for ( let i = 0, il = this.plugins.length; i < il; i ++ ) { func( this.plugins[ i ] ); } } } /** * Punctual Lights Extension * * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual */ class GLTFLightExtension { constructor( writer ) { this.writer = writer; this.name = 'KHR_lights_punctual'; } writeNode( light, nodeDef ) { if ( ! light.isLight ) return; if ( ! light.isDirectionalLight && ! light.isPointLight && ! light.isSpotLight ) { console.warn( 'THREE.GLTFExporter: Only directional, point, and spot lights are supported.', light ); return; } const writer = this.writer; const json = writer.json; const extensionsUsed = writer.extensionsUsed; const lightDef = {}; if ( light.name ) lightDef.name = light.name; lightDef.color = light.color.toArray(); lightDef.intensity = light.intensity; if ( light.isDirectionalLight ) { lightDef.type = 'directional'; } else if ( light.isPointLight ) { lightDef.type = 'point'; if ( light.distance > 0 ) lightDef.range = light.distance; } else if ( light.isSpotLight ) { lightDef.type = 'spot'; if ( light.distance > 0 ) lightDef.range = light.distance; lightDef.spot = {}; lightDef.spot.innerConeAngle = ( light.penumbra - 1.0 ) * light.angle * - 1.0; lightDef.spot.outerConeAngle = light.angle; } if ( light.decay !== undefined && light.decay !== 2 ) { console.warn( 'THREE.GLTFExporter: Light decay may be lost. glTF is physically-based, ' + 'and expects light.decay=2.' ); } if ( light.target && ( light.target.parent !== light || light.target.position.x !== 0 || light.target.position.y !== 0 || light.target.position.z !== - 1 ) ) { console.warn( 'THREE.GLTFExporter: Light direction may be lost. For best results, ' + 'make light.target a child of the light with position 0,0,-1.' ); } if ( ! extensionsUsed[ this.name ] ) { json.extensions = json.extensions || {}; json.extensions[ this.name ] = { lights: [] }; extensionsUsed[ this.name ] = true; } const lights = json.extensions[ this.name ].lights; lights.push( lightDef ); nodeDef.extensions = nodeDef.extensions || {}; nodeDef.extensions[ this.name ] = { light: lights.length - 1 }; } } /** * Unlit Materials Extension * * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit */ class GLTFMaterialsUnlitExtension { constructor( writer ) { this.writer = writer; this.name = 'KHR_materials_unlit'; } writeMaterial( material, materialDef ) { if ( ! material.isMeshBasicMaterial ) return; const writer = this.writer; const extensionsUsed = writer.extensionsUsed; materialDef.extensions = materialDef.extensions || {}; materialDef.extensions[ this.name ] = {}; extensionsUsed[ this.name ] = true; materialDef.pbrMetallicRoughness.metallicFactor = 0.0; materialDef.pbrMetallicRoughness.roughnessFactor = 0.9; } } /** * Specular-Glossiness Extension * * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness */ class GLTFMaterialsPBRSpecularGlossiness { constructor( writer ) { this.writer = writer; this.name = 'KHR_materials_pbrSpecularGlossiness'; } writeMaterial( material, materialDef ) { if ( ! material.isGLTFSpecularGlossinessMaterial ) return; const writer = this.writer; const extensionsUsed = writer.extensionsUsed; const extensionDef = {}; if ( materialDef.pbrMetallicRoughness.baseColorFactor ) { extensionDef.diffuseFactor = materialDef.pbrMetallicRoughness.baseColorFactor; } const specularFactor = [ 1, 1, 1 ]; material.specular.toArray( specularFactor, 0 ); extensionDef.specularFactor = specularFactor; extensionDef.glossinessFactor = material.glossiness; if ( materialDef.pbrMetallicRoughness.baseColorTexture ) { extensionDef.diffuseTexture = materialDef.pbrMetallicRoughness.baseColorTexture; } if ( material.specularMap ) { const specularMapDef = { index: writer.processTexture( material.specularMap ) }; writer.applyTextureTransform( specularMapDef, material.specularMap ); extensionDef.specularGlossinessTexture = specularMapDef; } materialDef.extensions = materialDef.extensions || {}; materialDef.extensions[ this.name ] = extensionDef; extensionsUsed[ this.name ] = true; } } /** * Static utility functions */ GLTFExporter.Utils = { insertKeyframe: function ( track, time ) { const tolerance = 0.001; // 1ms const valueSize = track.getValueSize(); const times = new track.TimeBufferType( track.times.length + 1 ); const values = new track.ValueBufferType( track.values.length + valueSize ); const interpolant = track.createInterpolant( new track.ValueBufferType( valueSize ) ); let index; if ( track.times.length === 0 ) { times[ 0 ] = time; for ( let i = 0; i < valueSize; i ++ ) { values[ i ] = 0; } index = 0; } else if ( time < track.times[ 0 ] ) { if ( Math.abs( track.times[ 0 ] - time ) < tolerance ) return 0; times[ 0 ] = time; times.set( track.times, 1 ); values.set( interpolant.evaluate( time ), 0 ); values.set( track.values, valueSize ); index = 0; } else if ( time > track.times[ track.times.length - 1 ] ) { if ( Math.abs( track.times[ track.times.length - 1 ] - time ) < tolerance ) { return track.times.length - 1; } times[ times.length - 1 ] = time; times.set( track.times, 0 ); values.set( track.values, 0 ); values.set( interpolant.evaluate( time ), track.values.length ); index = times.length - 1; } else { for ( let i = 0; i < track.times.length; i ++ ) { if ( Math.abs( track.times[ i ] - time ) < tolerance ) return i; if ( track.times[ i ] < time && track.times[ i + 1 ] > time ) { times.set( track.times.slice( 0, i + 1 ), 0 ); times[ i + 1 ] = time; times.set( track.times.slice( i + 1 ), i + 2 ); values.set( track.values.slice( 0, ( i + 1 ) * valueSize ), 0 ); values.set( interpolant.evaluate( time ), ( i + 1 ) * valueSize ); values.set( track.values.slice( ( i + 1 ) * valueSize ), ( i + 2 ) * valueSize ); index = i + 1; break; } } } track.times = times; track.values = values; return index; }, mergeMorphTargetTracks: function ( clip, root ) { const tracks = []; const mergedTracks = {}; const sourceTracks = clip.tracks; for ( let i = 0; i < sourceTracks.length; ++ i ) { let sourceTrack = sourceTracks[ i ]; const sourceTrackBinding = PropertyBinding.parseTrackName( sourceTrack.name ); const sourceTrackNode = PropertyBinding.findNode( root, sourceTrackBinding.nodeName ); if ( sourceTrackBinding.propertyName !== 'morphTargetInfluences' || sourceTrackBinding.propertyIndex === undefined ) { // Tracks that don't affect morph targets, or that affect all morph targets together, can be left as-is. tracks.push( sourceTrack ); continue; } if ( sourceTrack.createInterpolant !== sourceTrack.InterpolantFactoryMethodDiscrete && sourceTrack.createInterpolant !== sourceTrack.InterpolantFactoryMethodLinear ) { if ( sourceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline ) { // This should never happen, because glTF morph target animations // affect all targets already. throw new Error( 'THREE.GLTFExporter: Cannot merge tracks with glTF CUBICSPLINE interpolation.' ); } console.warn( 'THREE.GLTFExporter: Morph target interpolation mode not yet supported. Using LINEAR instead.' ); sourceTrack = sourceTrack.clone(); sourceTrack.setInterpolation( InterpolateLinear ); } const targetCount = sourceTrackNode.morphTargetInfluences.length; const targetIndex = sourceTrackNode.morphTargetDictionary[ sourceTrackBinding.propertyIndex ]; if ( targetIndex === undefined ) { throw new Error( 'THREE.GLTFExporter: Morph target name not found: ' + sourceTrackBinding.propertyIndex ); } let mergedTrack; // If this is the first time we've seen this object, create a new // track to store merged keyframe data for each morph target. if ( mergedTracks[ sourceTrackNode.uuid ] === undefined ) { mergedTrack = sourceTrack.clone(); const values = new mergedTrack.ValueBufferType( targetCount * mergedTrack.times.length ); for ( let j = 0; j < mergedTrack.times.length; j ++ ) { values[ j * targetCount + targetIndex ] = mergedTrack.values[ j ]; } // We need to take into consideration the intended target node // of our original un-merged morphTarget animation. mergedTrack.name = ( sourceTrackBinding.nodeName || '' ) + '.morphTargetInfluences'; mergedTrack.values = values; mergedTracks[ sourceTrackNode.uuid ] = mergedTrack; tracks.push( mergedTrack ); continue; } const sourceInterpolant = sourceTrack.createInterpolant( new sourceTrack.ValueBufferType( 1 ) ); mergedTrack = mergedTracks[ sourceTrackNode.uuid ]; // For every existing keyframe of the merged track, write a (possibly // interpolated) value from the source track. for ( let j = 0; j < mergedTrack.times.length; j ++ ) { mergedTrack.values[ j * targetCount + targetIndex ] = sourceInterpolant.evaluate( mergedTrack.times[ j ] ); } // For every existing keyframe of the source track, write a (possibly // new) keyframe to the merged track. Values from the previous loop may // be written again, but keyframes are de-duplicated. for ( let j = 0; j < sourceTrack.times.length; j ++ ) { const keyframeIndex = this.insertKeyframe( mergedTrack, sourceTrack.times[ j ] ); mergedTrack.values[ keyframeIndex * targetCount + targetIndex ] = sourceTrack.values[ j ]; } } clip.tracks = tracks; return clip; } }; export { GLTFExporter };