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2425 lines
64 KiB
2425 lines
64 KiB
( function () {
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class GLTFExporter {
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constructor() {
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this.pluginCallbacks = [];
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this.register( function ( writer ) {
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return new GLTFLightExtension( writer );
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} );
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this.register( function ( writer ) {
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return new GLTFMaterialsUnlitExtension( writer );
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} );
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this.register( function ( writer ) {
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return new GLTFMaterialsPBRSpecularGlossiness( writer );
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} );
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this.register( function ( writer ) {
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return new GLTFMaterialsTransmissionExtension( writer );
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} );
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this.register( function ( writer ) {
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return new GLTFMaterialsVolumeExtension( writer );
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} );
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this.register( function ( writer ) {
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return new GLTFMaterialsClearcoatExtension( writer );
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} );
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this.register( function ( writer ) {
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return new GLTFMaterialsIridescenceExtension( writer );
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} );
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}
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register( callback ) {
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if ( this.pluginCallbacks.indexOf( callback ) === - 1 ) {
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this.pluginCallbacks.push( callback );
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}
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return this;
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}
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unregister( callback ) {
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if ( this.pluginCallbacks.indexOf( callback ) !== - 1 ) {
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this.pluginCallbacks.splice( this.pluginCallbacks.indexOf( callback ), 1 );
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}
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return this;
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}
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/**
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* Parse scenes and generate GLTF output
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* @param {Scene or [THREE.Scenes]} input THREE.Scene or Array of THREE.Scenes
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* @param {Function} onDone Callback on completed
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* @param {Function} onError Callback on errors
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* @param {Object} options options
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*/
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parse( input, onDone, onError, options ) {
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const writer = new GLTFWriter();
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const plugins = [];
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for ( let i = 0, il = this.pluginCallbacks.length; i < il; i ++ ) {
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plugins.push( this.pluginCallbacks[ i ]( writer ) );
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}
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writer.setPlugins( plugins );
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writer.write( input, onDone, options ).catch( onError );
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}
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parseAsync( input, options ) {
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const scope = this;
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return new Promise( function ( resolve, reject ) {
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scope.parse( input, resolve, reject, options );
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} );
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}
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}
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//------------------------------------------------------------------------------
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// Constants
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//------------------------------------------------------------------------------
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const WEBGL_CONSTANTS = {
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POINTS: 0x0000,
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LINES: 0x0001,
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LINE_LOOP: 0x0002,
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LINE_STRIP: 0x0003,
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TRIANGLES: 0x0004,
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TRIANGLE_STRIP: 0x0005,
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TRIANGLE_FAN: 0x0006,
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UNSIGNED_BYTE: 0x1401,
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UNSIGNED_SHORT: 0x1403,
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FLOAT: 0x1406,
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UNSIGNED_INT: 0x1405,
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ARRAY_BUFFER: 0x8892,
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ELEMENT_ARRAY_BUFFER: 0x8893,
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NEAREST: 0x2600,
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LINEAR: 0x2601,
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NEAREST_MIPMAP_NEAREST: 0x2700,
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LINEAR_MIPMAP_NEAREST: 0x2701,
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NEAREST_MIPMAP_LINEAR: 0x2702,
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LINEAR_MIPMAP_LINEAR: 0x2703,
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CLAMP_TO_EDGE: 33071,
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MIRRORED_REPEAT: 33648,
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REPEAT: 10497
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};
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const THREE_TO_WEBGL = {};
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THREE_TO_WEBGL[ THREE.NearestFilter ] = WEBGL_CONSTANTS.NEAREST;
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THREE_TO_WEBGL[ THREE.NearestMipmapNearestFilter ] = WEBGL_CONSTANTS.NEAREST_MIPMAP_NEAREST;
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THREE_TO_WEBGL[ THREE.NearestMipmapLinearFilter ] = WEBGL_CONSTANTS.NEAREST_MIPMAP_LINEAR;
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THREE_TO_WEBGL[ THREE.LinearFilter ] = WEBGL_CONSTANTS.LINEAR;
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THREE_TO_WEBGL[ THREE.LinearMipmapNearestFilter ] = WEBGL_CONSTANTS.LINEAR_MIPMAP_NEAREST;
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THREE_TO_WEBGL[ THREE.LinearMipmapLinearFilter ] = WEBGL_CONSTANTS.LINEAR_MIPMAP_LINEAR;
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THREE_TO_WEBGL[ THREE.ClampToEdgeWrapping ] = WEBGL_CONSTANTS.CLAMP_TO_EDGE;
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THREE_TO_WEBGL[ THREE.RepeatWrapping ] = WEBGL_CONSTANTS.REPEAT;
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THREE_TO_WEBGL[ THREE.MirroredRepeatWrapping ] = WEBGL_CONSTANTS.MIRRORED_REPEAT;
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const PATH_PROPERTIES = {
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scale: 'scale',
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position: 'translation',
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quaternion: 'rotation',
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morphTargetInfluences: 'weights'
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};
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// GLB constants
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// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#glb-file-format-specification
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const GLB_HEADER_BYTES = 12;
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const GLB_HEADER_MAGIC = 0x46546C67;
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const GLB_VERSION = 2;
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const GLB_CHUNK_PREFIX_BYTES = 8;
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const GLB_CHUNK_TYPE_JSON = 0x4E4F534A;
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const GLB_CHUNK_TYPE_BIN = 0x004E4942;
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//------------------------------------------------------------------------------
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// Utility functions
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//------------------------------------------------------------------------------
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/**
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* Compare two arrays
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* @param {Array} array1 Array 1 to compare
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* @param {Array} array2 Array 2 to compare
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* @return {Boolean} Returns true if both arrays are equal
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*/
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function equalArray( array1, array2 ) {
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return array1.length === array2.length && array1.every( function ( element, index ) {
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return element === array2[ index ];
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} );
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}
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/**
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* Converts a string to an ArrayBuffer.
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* @param {string} text
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* @return {ArrayBuffer}
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*/
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function stringToArrayBuffer( text ) {
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return new TextEncoder().encode( text ).buffer;
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}
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/**
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* Is identity matrix
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*
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* @param {Matrix4} matrix
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* @returns {Boolean} Returns true, if parameter is identity matrix
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*/
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function isIdentityMatrix( matrix ) {
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return equalArray( matrix.elements, [ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 ] );
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}
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/**
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* Get the min and max vectors from the given attribute
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* @param {BufferAttribute} attribute Attribute to find the min/max in range from start to start + count
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* @param {Integer} start
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* @param {Integer} count
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* @return {Object} Object containing the `min` and `max` values (As an array of attribute.itemSize components)
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*/
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function getMinMax( attribute, start, count ) {
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const output = {
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min: new Array( attribute.itemSize ).fill( Number.POSITIVE_INFINITY ),
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max: new Array( attribute.itemSize ).fill( Number.NEGATIVE_INFINITY )
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};
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for ( let i = start; i < start + count; i ++ ) {
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for ( let a = 0; a < attribute.itemSize; a ++ ) {
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let value;
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if ( attribute.itemSize > 4 ) {
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// no support for interleaved data for itemSize > 4
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value = attribute.array[ i * attribute.itemSize + a ];
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} else {
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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 );
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}
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output.min[ a ] = Math.min( output.min[ a ], value );
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output.max[ a ] = Math.max( output.max[ a ], value );
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}
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}
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return output;
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}
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/**
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* Get the required size + padding for a buffer, rounded to the next 4-byte boundary.
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* https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#data-alignment
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*
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* @param {Integer} bufferSize The size the original buffer.
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* @returns {Integer} new buffer size with required padding.
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*
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*/
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function getPaddedBufferSize( bufferSize ) {
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return Math.ceil( bufferSize / 4 ) * 4;
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}
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/**
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* Returns a buffer aligned to 4-byte boundary.
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*
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* @param {ArrayBuffer} arrayBuffer Buffer to pad
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* @param {Integer} paddingByte (Optional)
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* @returns {ArrayBuffer} The same buffer if it's already aligned to 4-byte boundary or a new buffer
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*/
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function getPaddedArrayBuffer( arrayBuffer, paddingByte = 0 ) {
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const paddedLength = getPaddedBufferSize( arrayBuffer.byteLength );
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if ( paddedLength !== arrayBuffer.byteLength ) {
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const array = new Uint8Array( paddedLength );
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array.set( new Uint8Array( arrayBuffer ) );
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if ( paddingByte !== 0 ) {
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for ( let i = arrayBuffer.byteLength; i < paddedLength; i ++ ) {
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array[ i ] = paddingByte;
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}
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}
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return array.buffer;
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}
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return arrayBuffer;
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}
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function getCanvas() {
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if ( typeof document === 'undefined' && typeof OffscreenCanvas !== 'undefined' ) {
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return new OffscreenCanvas( 1, 1 );
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}
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return document.createElement( 'canvas' );
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}
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function getToBlobPromise( canvas, mimeType ) {
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if ( canvas.toBlob !== undefined ) {
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return new Promise( resolve => canvas.toBlob( resolve, mimeType ) );
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}
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let quality;
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// Blink's implementation of convertToBlob seems to default to a quality level of 100%
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// Use the Blink default quality levels of toBlob instead so that file sizes are comparable.
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if ( mimeType === 'image/jpeg' ) {
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quality = 0.92;
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} else if ( mimeType === 'image/webp' ) {
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quality = 0.8;
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}
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return canvas.convertToBlob( {
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type: mimeType,
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quality: quality
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} );
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}
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/**
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* Writer
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*/
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class GLTFWriter {
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constructor() {
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this.plugins = [];
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this.options = {};
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this.pending = [];
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this.buffers = [];
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this.byteOffset = 0;
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this.buffers = [];
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this.nodeMap = new Map();
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this.skins = [];
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this.extensionsUsed = {};
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this.uids = new Map();
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this.uid = 0;
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this.json = {
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asset: {
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version: '2.0',
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generator: 'THREE.GLTFExporter'
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}
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};
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this.cache = {
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meshes: new Map(),
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attributes: new Map(),
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attributesNormalized: new Map(),
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materials: new Map(),
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textures: new Map(),
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images: new Map()
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};
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}
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setPlugins( plugins ) {
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this.plugins = plugins;
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}
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/**
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* Parse scenes and generate GLTF output
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* @param {Scene or [THREE.Scenes]} input THREE.Scene or Array of THREE.Scenes
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* @param {Function} onDone Callback on completed
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* @param {Object} options options
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*/
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async write( input, onDone, options ) {
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this.options = Object.assign( {}, {
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// default options
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binary: false,
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trs: false,
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onlyVisible: true,
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maxTextureSize: Infinity,
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animations: [],
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includeCustomExtensions: false
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}, options );
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if ( this.options.animations.length > 0 ) {
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// Only TRS properties, and not matrices, may be targeted by animation.
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this.options.trs = true;
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}
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this.processInput( input );
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await Promise.all( this.pending );
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const writer = this;
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const buffers = writer.buffers;
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const json = writer.json;
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options = writer.options;
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const extensionsUsed = writer.extensionsUsed;
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// Merge buffers.
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const blob = new Blob( buffers, {
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type: 'application/octet-stream'
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} );
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// Declare extensions.
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const extensionsUsedList = Object.keys( extensionsUsed );
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if ( extensionsUsedList.length > 0 ) json.extensionsUsed = extensionsUsedList;
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// Update bytelength of the single buffer.
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if ( json.buffers && json.buffers.length > 0 ) json.buffers[ 0 ].byteLength = blob.size;
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if ( options.binary === true ) {
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// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#glb-file-format-specification
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const reader = new FileReader();
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reader.readAsArrayBuffer( blob );
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reader.onloadend = function () {
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// Binary chunk.
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const binaryChunk = getPaddedArrayBuffer( reader.result );
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const binaryChunkPrefix = new DataView( new ArrayBuffer( GLB_CHUNK_PREFIX_BYTES ) );
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binaryChunkPrefix.setUint32( 0, binaryChunk.byteLength, true );
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binaryChunkPrefix.setUint32( 4, GLB_CHUNK_TYPE_BIN, true );
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// JSON chunk.
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const jsonChunk = getPaddedArrayBuffer( stringToArrayBuffer( JSON.stringify( json ) ), 0x20 );
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const jsonChunkPrefix = new DataView( new ArrayBuffer( GLB_CHUNK_PREFIX_BYTES ) );
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jsonChunkPrefix.setUint32( 0, jsonChunk.byteLength, true );
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jsonChunkPrefix.setUint32( 4, GLB_CHUNK_TYPE_JSON, true );
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// GLB header.
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const header = new ArrayBuffer( GLB_HEADER_BYTES );
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const headerView = new DataView( header );
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headerView.setUint32( 0, GLB_HEADER_MAGIC, true );
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headerView.setUint32( 4, GLB_VERSION, true );
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const totalByteLength = GLB_HEADER_BYTES + jsonChunkPrefix.byteLength + jsonChunk.byteLength + binaryChunkPrefix.byteLength + binaryChunk.byteLength;
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headerView.setUint32( 8, totalByteLength, true );
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const glbBlob = new Blob( [ header, jsonChunkPrefix, jsonChunk, binaryChunkPrefix, binaryChunk ], {
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type: 'application/octet-stream'
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} );
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const glbReader = new FileReader();
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glbReader.readAsArrayBuffer( glbBlob );
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glbReader.onloadend = function () {
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onDone( glbReader.result );
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};
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};
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} else {
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if ( json.buffers && json.buffers.length > 0 ) {
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const reader = new FileReader();
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reader.readAsDataURL( blob );
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reader.onloadend = function () {
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const base64data = reader.result;
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json.buffers[ 0 ].uri = base64data;
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onDone( json );
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};
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} else {
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onDone( json );
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}
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}
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}
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/**
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* Serializes a userData.
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*
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* @param {THREE.Object3D|THREE.Material} object
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* @param {Object} objectDef
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*/
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serializeUserData( object, objectDef ) {
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if ( Object.keys( object.userData ).length === 0 ) return;
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const options = this.options;
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const extensionsUsed = this.extensionsUsed;
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try {
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const json = JSON.parse( JSON.stringify( object.userData ) );
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if ( options.includeCustomExtensions && json.gltfExtensions ) {
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if ( objectDef.extensions === undefined ) objectDef.extensions = {};
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for ( const extensionName in json.gltfExtensions ) {
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objectDef.extensions[ extensionName ] = json.gltfExtensions[ extensionName ];
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extensionsUsed[ extensionName ] = true;
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}
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delete json.gltfExtensions;
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}
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if ( Object.keys( json ).length > 0 ) objectDef.extras = json;
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} catch ( error ) {
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console.warn( 'THREE.GLTFExporter: userData of \'' + object.name + '\' ' + 'won\'t be serialized because of JSON.stringify error - ' + error.message );
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}
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}
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/**
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* Returns ids for buffer attributes.
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* @param {Object} object
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* @return {Integer}
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*/
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getUID( attribute, isRelativeCopy = false ) {
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if ( this.uids.has( attribute ) === false ) {
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const uids = new Map();
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uids.set( true, this.uid ++ );
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uids.set( false, this.uid ++ );
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this.uids.set( attribute, uids );
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}
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const uids = this.uids.get( attribute );
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return uids.get( isRelativeCopy );
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}
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/**
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|
* Checks if normal attribute values are normalized.
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*
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* @param {BufferAttribute} normal
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* @returns {Boolean}
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*/
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|
isNormalizedNormalAttribute( normal ) {
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const cache = this.cache;
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if ( cache.attributesNormalized.has( normal ) ) return false;
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const v = new THREE.Vector3();
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for ( let i = 0, il = normal.count; i < il; i ++ ) {
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// 0.0005 is from glTF-validator
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if ( Math.abs( v.fromBufferAttribute( normal, i ).length() - 1.0 ) > 0.0005 ) return false;
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}
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return true;
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}
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|
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/**
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* Creates normalized normal buffer attribute.
|
|
*
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|
* @param {BufferAttribute} normal
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|
* @returns {BufferAttribute}
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|
*
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|
*/
|
|
createNormalizedNormalAttribute( normal ) {
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const cache = this.cache;
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|
if ( cache.attributesNormalized.has( normal ) ) return cache.attributesNormalized.get( normal );
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|
const attribute = normal.clone();
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|
const v = new THREE.Vector3();
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|
for ( let i = 0, il = attribute.count; i < il; i ++ ) {
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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;
|
|
|
|
}
|
|
|
|
}
|
|
buildMetalRoughTexture( metalnessMap, roughnessMap ) {
|
|
|
|
if ( metalnessMap === roughnessMap ) return metalnessMap;
|
|
function getEncodingConversion( map ) {
|
|
|
|
if ( map.encoding === THREE.sRGBEncoding ) {
|
|
|
|
return function SRGBToLinear( c ) {
|
|
|
|
return c < 0.04045 ? c * 0.0773993808 : Math.pow( c * 0.9478672986 + 0.0521327014, 2.4 );
|
|
|
|
};
|
|
|
|
}
|
|
|
|
return function LinearToLinear( c ) {
|
|
|
|
return c;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
console.warn( 'THREE.GLTFExporter: Merged metalnessMap and roughnessMap textures.' );
|
|
const metalness = metalnessMap?.image;
|
|
const roughness = roughnessMap?.image;
|
|
const width = Math.max( metalness?.width || 0, roughness?.width || 0 );
|
|
const height = Math.max( metalness?.height || 0, roughness?.height || 0 );
|
|
const canvas = getCanvas();
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
const context = canvas.getContext( '2d' );
|
|
context.fillStyle = '#00ffff';
|
|
context.fillRect( 0, 0, width, height );
|
|
const composite = context.getImageData( 0, 0, width, height );
|
|
if ( metalness ) {
|
|
|
|
context.drawImage( metalness, 0, 0, width, height );
|
|
const convert = getEncodingConversion( metalnessMap );
|
|
const data = context.getImageData( 0, 0, width, height ).data;
|
|
for ( let i = 2; i < data.length; i += 4 ) {
|
|
|
|
composite.data[ i ] = convert( data[ i ] / 256 ) * 256;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( roughness ) {
|
|
|
|
context.drawImage( roughness, 0, 0, width, height );
|
|
const convert = getEncodingConversion( roughnessMap );
|
|
const data = context.getImageData( 0, 0, width, height ).data;
|
|
for ( let i = 1; i < data.length; i += 4 ) {
|
|
|
|
composite.data[ i ] = convert( data[ i ] / 256 ) * 256;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
context.putImageData( composite, 0, 0 );
|
|
|
|
//
|
|
|
|
const reference = metalnessMap || roughnessMap;
|
|
const texture = reference.clone();
|
|
texture.source = new THREE.Source( canvas );
|
|
texture.encoding = THREE.LinearEncoding;
|
|
return texture;
|
|
|
|
}
|
|
|
|
/**
|
|
* 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<Integer>}
|
|
*/
|
|
processBufferViewImage( blob ) {
|
|
|
|
const writer = this;
|
|
const json = writer.json;
|
|
if ( ! json.bufferViews ) json.bufferViews = [];
|
|
return new Promise( function ( resolve ) {
|
|
|
|
const reader = new 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 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;
|
|
|
|
// 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 (THREE.RGBAFormat)
|
|
* @param {Boolean} flipY before writing out the image
|
|
* @param {String} mimeType export format
|
|
* @return {Integer} Index of the processed texture in the "images" array
|
|
*/
|
|
processImage( image, format, flipY, mimeType = 'image/png' ) {
|
|
|
|
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 key = mimeType + ':flipY/' + flipY.toString();
|
|
if ( cachedImages[ key ] !== undefined ) return cachedImages[ key ];
|
|
if ( ! json.images ) json.images = [];
|
|
const imageDef = {
|
|
mimeType: mimeType
|
|
};
|
|
const canvas = getCanvas();
|
|
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 ( image.data !== undefined ) {
|
|
|
|
// THREE.DataTexture
|
|
|
|
if ( format !== THREE.RGBAFormat ) {
|
|
|
|
console.error( 'GLTFExporter: Only THREE.RGBAFormat is 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 );
|
|
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 ];
|
|
|
|
}
|
|
|
|
ctx.putImageData( new ImageData( data, image.width, image.height ), 0, 0 );
|
|
|
|
} else {
|
|
|
|
ctx.drawImage( image, 0, 0, canvas.width, canvas.height );
|
|
|
|
}
|
|
|
|
if ( options.binary === true ) {
|
|
|
|
pending.push( getToBlobPromise( canvas, mimeType ).then( blob => writer.processBufferViewImage( blob ) ).then( bufferViewIndex => {
|
|
|
|
imageDef.bufferView = bufferViewIndex;
|
|
|
|
} ) );
|
|
|
|
} else {
|
|
|
|
if ( canvas.toDataURL !== undefined ) {
|
|
|
|
imageDef.uri = canvas.toDataURL( mimeType );
|
|
|
|
} else {
|
|
|
|
pending.push( getToBlobPromise( canvas, mimeType ).then( blob => new FileReader().readAsDataURL( blob ) ).then( dataURL => {
|
|
|
|
imageDef.uri = dataURL;
|
|
|
|
} ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
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 = [];
|
|
let mimeType = map.userData.mimeType;
|
|
if ( mimeType === 'image/webp' ) mimeType = 'image/png';
|
|
const textureDef = {
|
|
sampler: this.processSampler( map ),
|
|
source: this.processImage( map.image, map.format, map.flipY, mimeType )
|
|
};
|
|
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 ) {
|
|
|
|
const metalRoughTexture = this.buildMetalRoughTexture( material.metalnessMap, material.roughnessMap );
|
|
const metalRoughMapDef = {
|
|
index: this.processTexture( metalRoughTexture )
|
|
};
|
|
this.applyTextureTransform( metalRoughMapDef, metalRoughTexture );
|
|
materialDef.pbrMetallicRoughness.metallicRoughnessTexture = metalRoughMapDef;
|
|
|
|
}
|
|
|
|
// 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 ) {
|
|
|
|
// glTF normal scale is univariate. Ignore `y`, which may be flipped.
|
|
// Context: https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
|
|
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 === THREE.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;
|
|
|
|
}
|
|
|
|
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.slice( 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 THREE.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, true ) ) ) {
|
|
|
|
target[ gltfAttributeName ] = cache.attributes.get( this.getUID( attribute, true ) );
|
|
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, true ), 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: THREE.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 = THREE.PropertyBinding.parseTrackName( track.name );
|
|
let trackNode = THREE.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() === THREE.InterpolateDiscrete ) {
|
|
|
|
interpolation = 'STEP';
|
|
|
|
} else {
|
|
|
|
interpolation = 'LINEAR';
|
|
|
|
}
|
|
|
|
samplers.push( {
|
|
input: this.processAccessor( new THREE.BufferAttribute( track.times, inputItemSize ) ),
|
|
output: this.processAccessor( new THREE.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 THREE.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 THREE.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 THREE.Scene
|
|
* @param {Scene} node THREE.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 THREE.Scene to hold a list of objects and parse it
|
|
* @param {Array} objects List of objects to process
|
|
*/
|
|
processObjects( objects ) {
|
|
|
|
const scene = new THREE.Scene();
|
|
scene.name = 'AuxScene';
|
|
for ( let i = 0; i < objects.length; i ++ ) {
|
|
|
|
// We push directly to children instead of calling `add` to prevent
|
|
// modify the .parent and break its original scene and hierarchy
|
|
scene.children.push( objects[ i ] );
|
|
|
|
}
|
|
|
|
this.processScene( scene );
|
|
|
|
}
|
|
|
|
/**
|
|
* @param {THREE.Object3D|Array<THREE.Object3D>} 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 THREE.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/main/extensions/2.0/Archived/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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Clearcoat Materials Extension
|
|
*
|
|
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
|
|
*/
|
|
class GLTFMaterialsClearcoatExtension {
|
|
|
|
constructor( writer ) {
|
|
|
|
this.writer = writer;
|
|
this.name = 'KHR_materials_clearcoat';
|
|
|
|
}
|
|
writeMaterial( material, materialDef ) {
|
|
|
|
if ( ! material.isMeshPhysicalMaterial ) return;
|
|
const writer = this.writer;
|
|
const extensionsUsed = writer.extensionsUsed;
|
|
const extensionDef = {};
|
|
extensionDef.clearcoatFactor = material.clearcoat;
|
|
if ( material.clearcoatMap ) {
|
|
|
|
const clearcoatMapDef = {
|
|
index: writer.processTexture( material.clearcoatMap )
|
|
};
|
|
writer.applyTextureTransform( clearcoatMapDef, material.clearcoatMap );
|
|
extensionDef.clearcoatTexture = clearcoatMapDef;
|
|
|
|
}
|
|
|
|
extensionDef.clearcoatRoughnessFactor = material.clearcoatRoughness;
|
|
if ( material.clearcoatRoughnessMap ) {
|
|
|
|
const clearcoatRoughnessMapDef = {
|
|
index: writer.processTexture( material.clearcoatRoughnessMap )
|
|
};
|
|
writer.applyTextureTransform( clearcoatRoughnessMapDef, material.clearcoatRoughnessMap );
|
|
extensionDef.clearcoatRoughnessTexture = clearcoatRoughnessMapDef;
|
|
|
|
}
|
|
|
|
if ( material.clearcoatNormalMap ) {
|
|
|
|
const clearcoatNormalMapDef = {
|
|
index: writer.processTexture( material.clearcoatNormalMap )
|
|
};
|
|
writer.applyTextureTransform( clearcoatNormalMapDef, material.clearcoatNormalMap );
|
|
extensionDef.clearcoatNormalTexture = clearcoatNormalMapDef;
|
|
|
|
}
|
|
|
|
materialDef.extensions = materialDef.extensions || {};
|
|
materialDef.extensions[ this.name ] = extensionDef;
|
|
extensionsUsed[ this.name ] = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Iridescence Materials Extension
|
|
*
|
|
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_iridescence
|
|
*/
|
|
class GLTFMaterialsIridescenceExtension {
|
|
|
|
constructor( writer ) {
|
|
|
|
this.writer = writer;
|
|
this.name = 'KHR_materials_iridescence';
|
|
|
|
}
|
|
writeMaterial( material, materialDef ) {
|
|
|
|
if ( ! material.isMeshPhysicalMaterial ) return;
|
|
const writer = this.writer;
|
|
const extensionsUsed = writer.extensionsUsed;
|
|
const extensionDef = {};
|
|
extensionDef.iridescenceFactor = material.iridescence;
|
|
if ( material.iridescenceMap ) {
|
|
|
|
const iridescenceMapDef = {
|
|
index: writer.processTexture( material.iridescenceMap )
|
|
};
|
|
writer.applyTextureTransform( iridescenceMapDef, material.iridescenceMap );
|
|
extensionDef.iridescenceTexture = iridescenceMapDef;
|
|
|
|
}
|
|
|
|
extensionDef.iridescenceIor = material.iridescenceIOR;
|
|
extensionDef.iridescenceThicknessMinimum = material.iridescenceThicknessRange[ 0 ];
|
|
extensionDef.iridescenceThicknessMaximum = material.iridescenceThicknessRange[ 1 ];
|
|
if ( material.iridescenceThicknessMap ) {
|
|
|
|
const iridescenceThicknessMapDef = {
|
|
index: writer.processTexture( material.iridescenceThicknessMap )
|
|
};
|
|
writer.applyTextureTransform( iridescenceThicknessMapDef, material.iridescenceThicknessMap );
|
|
extensionDef.iridescenceThicknessTexture = iridescenceThicknessMapDef;
|
|
|
|
}
|
|
|
|
materialDef.extensions = materialDef.extensions || {};
|
|
materialDef.extensions[ this.name ] = extensionDef;
|
|
extensionsUsed[ this.name ] = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Transmission Materials Extension
|
|
*
|
|
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
|
|
*/
|
|
class GLTFMaterialsTransmissionExtension {
|
|
|
|
constructor( writer ) {
|
|
|
|
this.writer = writer;
|
|
this.name = 'KHR_materials_transmission';
|
|
|
|
}
|
|
writeMaterial( material, materialDef ) {
|
|
|
|
if ( ! material.isMeshPhysicalMaterial || material.transmission === 0 ) return;
|
|
const writer = this.writer;
|
|
const extensionsUsed = writer.extensionsUsed;
|
|
const extensionDef = {};
|
|
extensionDef.transmissionFactor = material.transmission;
|
|
if ( material.transmissionMap ) {
|
|
|
|
const transmissionMapDef = {
|
|
index: writer.processTexture( material.transmissionMap )
|
|
};
|
|
writer.applyTextureTransform( transmissionMapDef, material.transmissionMap );
|
|
extensionDef.transmissionTexture = transmissionMapDef;
|
|
|
|
}
|
|
|
|
materialDef.extensions = materialDef.extensions || {};
|
|
materialDef.extensions[ this.name ] = extensionDef;
|
|
extensionsUsed[ this.name ] = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Materials Volume Extension
|
|
*
|
|
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_volume
|
|
*/
|
|
class GLTFMaterialsVolumeExtension {
|
|
|
|
constructor( writer ) {
|
|
|
|
this.writer = writer;
|
|
this.name = 'KHR_materials_volume';
|
|
|
|
}
|
|
writeMaterial( material, materialDef ) {
|
|
|
|
if ( ! material.isMeshPhysicalMaterial || material.transmission === 0 ) return;
|
|
const writer = this.writer;
|
|
const extensionsUsed = writer.extensionsUsed;
|
|
const extensionDef = {};
|
|
extensionDef.thicknessFactor = material.thickness;
|
|
if ( material.thicknessMap ) {
|
|
|
|
const thicknessMapDef = {
|
|
index: writer.processTexture( material.thicknessMap )
|
|
};
|
|
writer.applyTextureTransform( thicknessMapDef, material.thicknessMap );
|
|
extensionDef.thicknessTexture = thicknessMapDef;
|
|
|
|
}
|
|
|
|
extensionDef.attenuationDistance = material.attenuationDistance;
|
|
extensionDef.attenuationColor = material.attenuationColor.toArray();
|
|
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 = THREE.PropertyBinding.parseTrackName( sourceTrack.name );
|
|
const sourceTrackNode = THREE.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( THREE.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;
|
|
|
|
}
|
|
};
|
|
|
|
THREE.GLTFExporter = GLTFExporter;
|
|
|
|
} )();
|
|
|