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830 lines
22 KiB
830 lines
22 KiB
( function () {
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class BufferGeometryUtils {
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static computeTangents( geometry ) {
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geometry.computeTangents();
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console.warn( 'THREE.BufferGeometryUtils: .computeTangents() has been removed. Use THREE.BufferGeometry.computeTangents() instead.' );
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}
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/**
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* @param {Array<BufferGeometry>} geometries
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* @param {Boolean} useGroups
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* @return {BufferGeometry}
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*/
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static mergeBufferGeometries( geometries, useGroups = false ) {
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const isIndexed = geometries[ 0 ].index !== null;
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const attributesUsed = new Set( Object.keys( geometries[ 0 ].attributes ) );
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const morphAttributesUsed = new Set( Object.keys( geometries[ 0 ].morphAttributes ) );
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const attributes = {};
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const morphAttributes = {};
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const morphTargetsRelative = geometries[ 0 ].morphTargetsRelative;
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const mergedGeometry = new THREE.BufferGeometry();
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let offset = 0;
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for ( let i = 0; i < geometries.length; ++ i ) {
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const geometry = geometries[ i ];
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let attributesCount = 0; // ensure that all geometries are indexed, or none
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if ( isIndexed !== ( geometry.index !== null ) ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. All geometries must have compatible attributes; make sure index attribute exists among all geometries, or in none of them.' );
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return null;
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} // gather attributes, exit early if they're different
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for ( const name in geometry.attributes ) {
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if ( ! attributesUsed.has( name ) ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. All geometries must have compatible attributes; make sure "' + name + '" attribute exists among all geometries, or in none of them.' );
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return null;
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}
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if ( attributes[ name ] === undefined ) attributes[ name ] = [];
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attributes[ name ].push( geometry.attributes[ name ] );
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attributesCount ++;
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} // ensure geometries have the same number of attributes
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if ( attributesCount !== attributesUsed.size ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. Make sure all geometries have the same number of attributes.' );
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return null;
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} // gather morph attributes, exit early if they're different
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if ( morphTargetsRelative !== geometry.morphTargetsRelative ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. .morphTargetsRelative must be consistent throughout all geometries.' );
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return null;
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}
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for ( const name in geometry.morphAttributes ) {
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if ( ! morphAttributesUsed.has( name ) ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. .morphAttributes must be consistent throughout all geometries.' );
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return null;
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}
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if ( morphAttributes[ name ] === undefined ) morphAttributes[ name ] = [];
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morphAttributes[ name ].push( geometry.morphAttributes[ name ] );
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} // gather .userData
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mergedGeometry.userData.mergedUserData = mergedGeometry.userData.mergedUserData || [];
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mergedGeometry.userData.mergedUserData.push( geometry.userData );
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if ( useGroups ) {
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let count;
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if ( isIndexed ) {
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count = geometry.index.count;
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} else if ( geometry.attributes.position !== undefined ) {
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count = geometry.attributes.position.count;
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} else {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index ' + i + '. The geometry must have either an index or a position attribute' );
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return null;
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}
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mergedGeometry.addGroup( offset, count, i );
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offset += count;
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}
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} // merge indices
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if ( isIndexed ) {
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let indexOffset = 0;
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const mergedIndex = [];
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for ( let i = 0; i < geometries.length; ++ i ) {
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const index = geometries[ i ].index;
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for ( let j = 0; j < index.count; ++ j ) {
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mergedIndex.push( index.getX( j ) + indexOffset );
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}
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indexOffset += geometries[ i ].attributes.position.count;
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}
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mergedGeometry.setIndex( mergedIndex );
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} // merge attributes
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for ( const name in attributes ) {
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const mergedAttribute = this.mergeBufferAttributes( attributes[ name ] );
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if ( ! mergedAttribute ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed while trying to merge the ' + name + ' attribute.' );
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return null;
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}
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mergedGeometry.setAttribute( name, mergedAttribute );
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} // merge morph attributes
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for ( const name in morphAttributes ) {
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const numMorphTargets = morphAttributes[ name ][ 0 ].length;
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if ( numMorphTargets === 0 ) break;
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mergedGeometry.morphAttributes = mergedGeometry.morphAttributes || {};
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mergedGeometry.morphAttributes[ name ] = [];
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for ( let i = 0; i < numMorphTargets; ++ i ) {
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const morphAttributesToMerge = [];
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for ( let j = 0; j < morphAttributes[ name ].length; ++ j ) {
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morphAttributesToMerge.push( morphAttributes[ name ][ j ][ i ] );
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}
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const mergedMorphAttribute = this.mergeBufferAttributes( morphAttributesToMerge );
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if ( ! mergedMorphAttribute ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferGeometries() failed while trying to merge the ' + name + ' morphAttribute.' );
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return null;
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}
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mergedGeometry.morphAttributes[ name ].push( mergedMorphAttribute );
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}
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}
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return mergedGeometry;
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}
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/**
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* @param {Array<BufferAttribute>} attributes
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* @return {BufferAttribute}
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*/
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static mergeBufferAttributes( attributes ) {
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let TypedArray;
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let itemSize;
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let normalized;
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let arrayLength = 0;
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for ( let i = 0; i < attributes.length; ++ i ) {
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const attribute = attributes[ i ];
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if ( attribute.isInterleavedBufferAttribute ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. InterleavedBufferAttributes are not supported.' );
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return null;
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}
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if ( TypedArray === undefined ) TypedArray = attribute.array.constructor;
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if ( TypedArray !== attribute.array.constructor ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. THREE.BufferAttribute.array must be of consistent array types across matching attributes.' );
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return null;
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}
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if ( itemSize === undefined ) itemSize = attribute.itemSize;
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if ( itemSize !== attribute.itemSize ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. THREE.BufferAttribute.itemSize must be consistent across matching attributes.' );
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return null;
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}
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if ( normalized === undefined ) normalized = attribute.normalized;
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if ( normalized !== attribute.normalized ) {
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console.error( 'THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. THREE.BufferAttribute.normalized must be consistent across matching attributes.' );
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return null;
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}
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arrayLength += attribute.array.length;
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}
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const array = new TypedArray( arrayLength );
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let offset = 0;
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for ( let i = 0; i < attributes.length; ++ i ) {
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array.set( attributes[ i ].array, offset );
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offset += attributes[ i ].array.length;
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}
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return new THREE.BufferAttribute( array, itemSize, normalized );
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}
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/**
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* @param {Array<BufferAttribute>} attributes
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* @return {Array<InterleavedBufferAttribute>}
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*/
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static interleaveAttributes( attributes ) {
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// Interleaves the provided attributes into an THREE.InterleavedBuffer and returns
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// a set of InterleavedBufferAttributes for each attribute
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let TypedArray;
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let arrayLength = 0;
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let stride = 0; // calculate the the length and type of the interleavedBuffer
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for ( let i = 0, l = attributes.length; i < l; ++ i ) {
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const attribute = attributes[ i ];
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if ( TypedArray === undefined ) TypedArray = attribute.array.constructor;
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if ( TypedArray !== attribute.array.constructor ) {
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console.error( 'AttributeBuffers of different types cannot be interleaved' );
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return null;
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}
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arrayLength += attribute.array.length;
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stride += attribute.itemSize;
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} // Create the set of buffer attributes
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const interleavedBuffer = new THREE.InterleavedBuffer( new TypedArray( arrayLength ), stride );
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let offset = 0;
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const res = [];
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const getters = [ 'getX', 'getY', 'getZ', 'getW' ];
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const setters = [ 'setX', 'setY', 'setZ', 'setW' ];
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for ( let j = 0, l = attributes.length; j < l; j ++ ) {
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const attribute = attributes[ j ];
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const itemSize = attribute.itemSize;
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const count = attribute.count;
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const iba = new THREE.InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, attribute.normalized );
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res.push( iba );
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offset += itemSize; // Move the data for each attribute into the new interleavedBuffer
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// at the appropriate offset
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for ( let c = 0; c < count; c ++ ) {
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for ( let k = 0; k < itemSize; k ++ ) {
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iba[ setters[ k ] ]( c, attribute[ getters[ k ] ]( c ) );
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}
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}
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}
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return res;
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}
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/**
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* @param {Array<BufferGeometry>} geometry
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* @return {number}
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*/
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static estimateBytesUsed( geometry ) {
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// Return the estimated memory used by this geometry in bytes
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// Calculate using itemSize, count, and BYTES_PER_ELEMENT to account
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// for InterleavedBufferAttributes.
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let mem = 0;
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for ( const name in geometry.attributes ) {
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const attr = geometry.getAttribute( name );
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mem += attr.count * attr.itemSize * attr.array.BYTES_PER_ELEMENT;
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}
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const indices = geometry.getIndex();
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mem += indices ? indices.count * indices.itemSize * indices.array.BYTES_PER_ELEMENT : 0;
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return mem;
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}
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/**
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* @param {BufferGeometry} geometry
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* @param {number} tolerance
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* @return {BufferGeometry>}
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*/
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static mergeVertices( geometry, tolerance = 1e-4 ) {
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tolerance = Math.max( tolerance, Number.EPSILON ); // Generate an index buffer if the geometry doesn't have one, or optimize it
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// if it's already available.
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const hashToIndex = {};
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const indices = geometry.getIndex();
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const positions = geometry.getAttribute( 'position' );
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const vertexCount = indices ? indices.count : positions.count; // next value for triangle indices
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let nextIndex = 0; // attributes and new attribute arrays
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const attributeNames = Object.keys( geometry.attributes );
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const attrArrays = {};
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const morphAttrsArrays = {};
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const newIndices = [];
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const getters = [ 'getX', 'getY', 'getZ', 'getW' ]; // initialize the arrays
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for ( let i = 0, l = attributeNames.length; i < l; i ++ ) {
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const name = attributeNames[ i ];
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attrArrays[ name ] = [];
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const morphAttr = geometry.morphAttributes[ name ];
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if ( morphAttr ) {
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morphAttrsArrays[ name ] = new Array( morphAttr.length ).fill().map( () => [] );
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}
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} // convert the error tolerance to an amount of decimal places to truncate to
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const decimalShift = Math.log10( 1 / tolerance );
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const shiftMultiplier = Math.pow( 10, decimalShift );
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for ( let i = 0; i < vertexCount; i ++ ) {
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const index = indices ? indices.getX( i ) : i; // Generate a hash for the vertex attributes at the current index 'i'
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let hash = '';
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for ( let j = 0, l = attributeNames.length; j < l; j ++ ) {
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const name = attributeNames[ j ];
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const attribute = geometry.getAttribute( name );
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const itemSize = attribute.itemSize;
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for ( let k = 0; k < itemSize; k ++ ) {
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// double tilde truncates the decimal value
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hash += `${~ ~ ( attribute[ getters[ k ] ]( index ) * shiftMultiplier )},`;
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}
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} // Add another reference to the vertex if it's already
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// used by another index
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if ( hash in hashToIndex ) {
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newIndices.push( hashToIndex[ hash ] );
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} else {
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// copy data to the new index in the attribute arrays
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for ( let j = 0, l = attributeNames.length; j < l; j ++ ) {
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const name = attributeNames[ j ];
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const attribute = geometry.getAttribute( name );
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const morphAttr = geometry.morphAttributes[ name ];
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const itemSize = attribute.itemSize;
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const newarray = attrArrays[ name ];
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const newMorphArrays = morphAttrsArrays[ name ];
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for ( let k = 0; k < itemSize; k ++ ) {
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const getterFunc = getters[ k ];
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newarray.push( attribute[ getterFunc ]( index ) );
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if ( morphAttr ) {
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for ( let m = 0, ml = morphAttr.length; m < ml; m ++ ) {
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newMorphArrays[ m ].push( morphAttr[ m ][ getterFunc ]( index ) );
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}
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}
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}
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}
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hashToIndex[ hash ] = nextIndex;
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newIndices.push( nextIndex );
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nextIndex ++;
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}
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} // Generate typed arrays from new attribute arrays and update
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// the attributeBuffers
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const result = geometry.clone();
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for ( let i = 0, l = attributeNames.length; i < l; i ++ ) {
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const name = attributeNames[ i ];
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const oldAttribute = geometry.getAttribute( name );
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const buffer = new oldAttribute.array.constructor( attrArrays[ name ] );
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const attribute = new THREE.BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.normalized );
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result.setAttribute( name, attribute ); // Update the attribute arrays
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if ( name in morphAttrsArrays ) {
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for ( let j = 0; j < morphAttrsArrays[ name ].length; j ++ ) {
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const oldMorphAttribute = geometry.morphAttributes[ name ][ j ];
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const buffer = new oldMorphAttribute.array.constructor( morphAttrsArrays[ name ][ j ] );
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const morphAttribute = new THREE.BufferAttribute( buffer, oldMorphAttribute.itemSize, oldMorphAttribute.normalized );
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result.morphAttributes[ name ][ j ] = morphAttribute;
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}
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}
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} // indices
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result.setIndex( newIndices );
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return result;
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}
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/**
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* @param {BufferGeometry} geometry
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* @param {number} drawMode
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* @return {BufferGeometry>}
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*/
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static toTrianglesDrawMode( geometry, drawMode ) {
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if ( drawMode === THREE.TrianglesDrawMode ) {
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console.warn( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Geometry already defined as triangles.' );
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return geometry;
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}
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if ( drawMode === THREE.TriangleFanDrawMode || drawMode === THREE.TriangleStripDrawMode ) {
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let index = geometry.getIndex(); // generate index if not present
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if ( index === null ) {
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const indices = [];
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const position = geometry.getAttribute( 'position' );
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if ( position !== undefined ) {
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for ( let i = 0; i < position.count; i ++ ) {
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indices.push( i );
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}
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geometry.setIndex( indices );
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index = geometry.getIndex();
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} else {
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console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.' );
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return geometry;
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}
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} //
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const numberOfTriangles = index.count - 2;
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const newIndices = [];
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if ( drawMode === THREE.TriangleFanDrawMode ) {
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// gl.TRIANGLE_FAN
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for ( let i = 1; i <= numberOfTriangles; i ++ ) {
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newIndices.push( index.getX( 0 ) );
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newIndices.push( index.getX( i ) );
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newIndices.push( index.getX( i + 1 ) );
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}
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} else {
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// gl.TRIANGLE_STRIP
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for ( let i = 0; i < numberOfTriangles; i ++ ) {
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if ( i % 2 === 0 ) {
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newIndices.push( index.getX( i ) );
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newIndices.push( index.getX( i + 1 ) );
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newIndices.push( index.getX( i + 2 ) );
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} else {
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newIndices.push( index.getX( i + 2 ) );
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newIndices.push( index.getX( i + 1 ) );
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newIndices.push( index.getX( i ) );
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}
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}
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}
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if ( newIndices.length / 3 !== numberOfTriangles ) {
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console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );
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} // build final geometry
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const newGeometry = geometry.clone();
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newGeometry.setIndex( newIndices );
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newGeometry.clearGroups();
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return newGeometry;
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} else {
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console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unknown draw mode:', drawMode );
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return geometry;
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}
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}
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/**
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* Calculates the morphed attributes of a morphed/skinned THREE.BufferGeometry.
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* Helpful for Raytracing or Decals.
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* @param {Mesh | Line | Points} object An instance of Mesh, Line or Points.
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* @return {Object} An Object with original position/normal attributes and morphed ones.
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*/
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static computeMorphedAttributes( object ) {
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if ( object.geometry.isBufferGeometry !== true ) {
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console.error( 'THREE.BufferGeometryUtils: Geometry is not of type THREE.BufferGeometry.' );
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return null;
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}
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const _vA = new THREE.Vector3();
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const _vB = new THREE.Vector3();
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const _vC = new THREE.Vector3();
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const _tempA = new THREE.Vector3();
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const _tempB = new THREE.Vector3();
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const _tempC = new THREE.Vector3();
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const _morphA = new THREE.Vector3();
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const _morphB = new THREE.Vector3();
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const _morphC = new THREE.Vector3();
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function _calculateMorphedAttributeData( object, material, attribute, morphAttribute, morphTargetsRelative, a, b, c, modifiedAttributeArray ) {
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_vA.fromBufferAttribute( attribute, a );
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_vB.fromBufferAttribute( attribute, b );
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_vC.fromBufferAttribute( attribute, c );
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const morphInfluences = object.morphTargetInfluences;
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if ( material.morphTargets && morphAttribute && morphInfluences ) {
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_morphA.set( 0, 0, 0 );
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_morphB.set( 0, 0, 0 );
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_morphC.set( 0, 0, 0 );
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for ( let i = 0, il = morphAttribute.length; i < il; i ++ ) {
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const influence = morphInfluences[ i ];
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const morph = morphAttribute[ i ];
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if ( influence === 0 ) continue;
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_tempA.fromBufferAttribute( morph, a );
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_tempB.fromBufferAttribute( morph, b );
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_tempC.fromBufferAttribute( morph, c );
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if ( morphTargetsRelative ) {
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_morphA.addScaledVector( _tempA, influence );
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_morphB.addScaledVector( _tempB, influence );
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_morphC.addScaledVector( _tempC, influence );
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} else {
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_morphA.addScaledVector( _tempA.sub( _vA ), influence );
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_morphB.addScaledVector( _tempB.sub( _vB ), influence );
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_morphC.addScaledVector( _tempC.sub( _vC ), influence );
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}
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}
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_vA.add( _morphA );
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_vB.add( _morphB );
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_vC.add( _morphC );
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}
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if ( object.isSkinnedMesh ) {
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object.boneTransform( a, _vA );
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object.boneTransform( b, _vB );
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object.boneTransform( c, _vC );
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}
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modifiedAttributeArray[ a * 3 + 0 ] = _vA.x;
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modifiedAttributeArray[ a * 3 + 1 ] = _vA.y;
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modifiedAttributeArray[ a * 3 + 2 ] = _vA.z;
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modifiedAttributeArray[ b * 3 + 0 ] = _vB.x;
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modifiedAttributeArray[ b * 3 + 1 ] = _vB.y;
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modifiedAttributeArray[ b * 3 + 2 ] = _vB.z;
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modifiedAttributeArray[ c * 3 + 0 ] = _vC.x;
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modifiedAttributeArray[ c * 3 + 1 ] = _vC.y;
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modifiedAttributeArray[ c * 3 + 2 ] = _vC.z;
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}
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const geometry = object.geometry;
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const material = object.material;
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let a, b, c;
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const index = geometry.index;
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const positionAttribute = geometry.attributes.position;
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const morphPosition = geometry.morphAttributes.position;
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const morphTargetsRelative = geometry.morphTargetsRelative;
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const normalAttribute = geometry.attributes.normal;
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const morphNormal = geometry.morphAttributes.position;
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const groups = geometry.groups;
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const drawRange = geometry.drawRange;
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let i, j, il, jl;
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let group, groupMaterial;
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let start, end;
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const modifiedPosition = new Float32Array( positionAttribute.count * positionAttribute.itemSize );
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const modifiedNormal = new Float32Array( normalAttribute.count * normalAttribute.itemSize );
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if ( index !== null ) {
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// indexed buffer geometry
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if ( Array.isArray( material ) ) {
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for ( i = 0, il = groups.length; i < il; i ++ ) {
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group = groups[ i ];
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groupMaterial = material[ group.materialIndex ];
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start = Math.max( group.start, drawRange.start );
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end = Math.min( group.start + group.count, drawRange.start + drawRange.count );
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for ( j = start, jl = end; j < jl; j += 3 ) {
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a = index.getX( j );
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b = index.getX( j + 1 );
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c = index.getX( j + 2 );
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_calculateMorphedAttributeData( object, groupMaterial, positionAttribute, morphPosition, morphTargetsRelative, a, b, c, modifiedPosition );
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_calculateMorphedAttributeData( object, groupMaterial, normalAttribute, morphNormal, morphTargetsRelative, a, b, c, modifiedNormal );
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}
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}
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} else {
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start = Math.max( 0, drawRange.start );
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end = Math.min( index.count, drawRange.start + drawRange.count );
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for ( i = start, il = end; i < il; i += 3 ) {
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a = index.getX( i );
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b = index.getX( i + 1 );
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c = index.getX( i + 2 );
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_calculateMorphedAttributeData( object, material, positionAttribute, morphPosition, morphTargetsRelative, a, b, c, modifiedPosition );
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_calculateMorphedAttributeData( object, material, normalAttribute, morphNormal, morphTargetsRelative, a, b, c, modifiedNormal );
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}
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}
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} else if ( positionAttribute !== undefined ) {
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// non-indexed buffer geometry
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if ( Array.isArray( material ) ) {
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for ( i = 0, il = groups.length; i < il; i ++ ) {
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group = groups[ i ];
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groupMaterial = material[ group.materialIndex ];
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start = Math.max( group.start, drawRange.start );
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end = Math.min( group.start + group.count, drawRange.start + drawRange.count );
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for ( j = start, jl = end; j < jl; j += 3 ) {
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a = j;
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b = j + 1;
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c = j + 2;
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_calculateMorphedAttributeData( object, groupMaterial, positionAttribute, morphPosition, morphTargetsRelative, a, b, c, modifiedPosition );
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_calculateMorphedAttributeData( object, groupMaterial, normalAttribute, morphNormal, morphTargetsRelative, a, b, c, modifiedNormal );
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}
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}
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} else {
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start = Math.max( 0, drawRange.start );
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end = Math.min( positionAttribute.count, drawRange.start + drawRange.count );
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for ( i = start, il = end; i < il; i += 3 ) {
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a = i;
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b = i + 1;
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c = i + 2;
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_calculateMorphedAttributeData( object, material, positionAttribute, morphPosition, morphTargetsRelative, a, b, c, modifiedPosition );
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_calculateMorphedAttributeData( object, material, normalAttribute, morphNormal, morphTargetsRelative, a, b, c, modifiedNormal );
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}
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}
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}
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const morphedPositionAttribute = new THREE.Float32BufferAttribute( modifiedPosition, 3 );
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const morphedNormalAttribute = new THREE.Float32BufferAttribute( modifiedNormal, 3 );
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return {
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positionAttribute: positionAttribute,
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normalAttribute: normalAttribute,
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morphedPositionAttribute: morphedPositionAttribute,
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morphedNormalAttribute: morphedNormalAttribute
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};
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}
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}
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THREE.BufferGeometryUtils = BufferGeometryUtils;
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} )();
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