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943 lines
22 KiB
943 lines
22 KiB
import { |
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BufferAttribute, |
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BufferGeometry, |
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Float32BufferAttribute, |
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InterleavedBuffer, |
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InterleavedBufferAttribute, |
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TriangleFanDrawMode, |
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TriangleStripDrawMode, |
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TrianglesDrawMode, |
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Vector3 |
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} from 'three'; |
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function computeTangents( geometry ) { |
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geometry.computeTangents(); |
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console.warn( 'THREE.BufferGeometryUtils: .computeTangents() has been removed. Use 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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function 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 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; |
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// 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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} |
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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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} |
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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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} |
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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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} |
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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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} |
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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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} |
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// merge attributes |
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for ( const name in attributes ) { |
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const mergedAttribute = 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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} |
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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 = 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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function 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. 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. 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. 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 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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function interleaveAttributes( attributes ) { |
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// Interleaves the provided attributes into an 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; |
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// 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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} |
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// Create the set of buffer attributes |
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const interleavedBuffer = new 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 InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, attribute.normalized ); |
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res.push( iba ); |
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offset += itemSize; |
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// 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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function 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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function mergeVertices( geometry, tolerance = 1e-4 ) { |
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tolerance = Math.max( tolerance, Number.EPSILON ); |
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// 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; |
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// next value for triangle indices |
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let nextIndex = 0; |
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// 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' ]; |
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// 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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} |
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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; |
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// 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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} |
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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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} |
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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 BufferAttribute( buffer, oldAttribute.itemSize, oldAttribute.normalized ); |
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result.setAttribute( name, attribute ); |
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// 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 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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} |
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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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function toTrianglesDrawMode( geometry, drawMode ) { |
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if ( drawMode === 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 === TriangleFanDrawMode || drawMode === TriangleStripDrawMode ) { |
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let index = geometry.getIndex(); |
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// 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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// |
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const numberOfTriangles = index.count - 2; |
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const newIndices = []; |
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if ( drawMode === 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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} |
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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 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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*/ |
|
function computeMorphedAttributes( object ) { |
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|
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if ( object.geometry.isBufferGeometry !== true ) { |
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console.error( 'THREE.BufferGeometryUtils: Geometry is not of type BufferGeometry.' ); |
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return null; |
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} |
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const _vA = new Vector3(); |
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const _vB = new Vector3(); |
|
const _vC = new Vector3(); |
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|
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const _tempA = new Vector3(); |
|
const _tempB = new Vector3(); |
|
const _tempC = new Vector3(); |
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|
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const _morphA = new Vector3(); |
|
const _morphB = new Vector3(); |
|
const _morphC = new Vector3(); |
|
|
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function _calculateMorphedAttributeData( |
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object, |
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material, |
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attribute, |
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morphAttribute, |
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morphTargetsRelative, |
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a, |
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b, |
|
c, |
|
modifiedAttributeArray |
|
) { |
|
|
|
_vA.fromBufferAttribute( attribute, a ); |
|
_vB.fromBufferAttribute( attribute, b ); |
|
_vC.fromBufferAttribute( attribute, c ); |
|
|
|
const morphInfluences = object.morphTargetInfluences; |
|
|
|
if ( material.morphTargets && morphAttribute && morphInfluences ) { |
|
|
|
_morphA.set( 0, 0, 0 ); |
|
_morphB.set( 0, 0, 0 ); |
|
_morphC.set( 0, 0, 0 ); |
|
|
|
for ( let i = 0, il = morphAttribute.length; i < il; i ++ ) { |
|
|
|
const influence = morphInfluences[ i ]; |
|
const morph = morphAttribute[ i ]; |
|
|
|
if ( influence === 0 ) continue; |
|
|
|
_tempA.fromBufferAttribute( morph, a ); |
|
_tempB.fromBufferAttribute( morph, b ); |
|
_tempC.fromBufferAttribute( morph, c ); |
|
|
|
if ( morphTargetsRelative ) { |
|
|
|
_morphA.addScaledVector( _tempA, influence ); |
|
_morphB.addScaledVector( _tempB, influence ); |
|
_morphC.addScaledVector( _tempC, influence ); |
|
|
|
} else { |
|
|
|
_morphA.addScaledVector( _tempA.sub( _vA ), influence ); |
|
_morphB.addScaledVector( _tempB.sub( _vB ), influence ); |
|
_morphC.addScaledVector( _tempC.sub( _vC ), influence ); |
|
|
|
} |
|
|
|
} |
|
|
|
_vA.add( _morphA ); |
|
_vB.add( _morphB ); |
|
_vC.add( _morphC ); |
|
|
|
} |
|
|
|
if ( object.isSkinnedMesh ) { |
|
|
|
object.boneTransform( a, _vA ); |
|
object.boneTransform( b, _vB ); |
|
object.boneTransform( c, _vC ); |
|
|
|
} |
|
|
|
modifiedAttributeArray[ a * 3 + 0 ] = _vA.x; |
|
modifiedAttributeArray[ a * 3 + 1 ] = _vA.y; |
|
modifiedAttributeArray[ a * 3 + 2 ] = _vA.z; |
|
modifiedAttributeArray[ b * 3 + 0 ] = _vB.x; |
|
modifiedAttributeArray[ b * 3 + 1 ] = _vB.y; |
|
modifiedAttributeArray[ b * 3 + 2 ] = _vB.z; |
|
modifiedAttributeArray[ c * 3 + 0 ] = _vC.x; |
|
modifiedAttributeArray[ c * 3 + 1 ] = _vC.y; |
|
modifiedAttributeArray[ c * 3 + 2 ] = _vC.z; |
|
|
|
} |
|
|
|
const geometry = object.geometry; |
|
const material = object.material; |
|
|
|
let a, b, c; |
|
const index = geometry.index; |
|
const positionAttribute = geometry.attributes.position; |
|
const morphPosition = geometry.morphAttributes.position; |
|
const morphTargetsRelative = geometry.morphTargetsRelative; |
|
const normalAttribute = geometry.attributes.normal; |
|
const morphNormal = geometry.morphAttributes.position; |
|
|
|
const groups = geometry.groups; |
|
const drawRange = geometry.drawRange; |
|
let i, j, il, jl; |
|
let group, groupMaterial; |
|
let start, end; |
|
|
|
const modifiedPosition = new Float32Array( positionAttribute.count * positionAttribute.itemSize ); |
|
const modifiedNormal = new Float32Array( normalAttribute.count * normalAttribute.itemSize ); |
|
|
|
if ( index !== null ) { |
|
|
|
// indexed buffer geometry |
|
|
|
if ( Array.isArray( material ) ) { |
|
|
|
for ( i = 0, il = groups.length; i < il; i ++ ) { |
|
|
|
group = groups[ i ]; |
|
groupMaterial = material[ group.materialIndex ]; |
|
|
|
start = Math.max( group.start, drawRange.start ); |
|
end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) ); |
|
|
|
for ( j = start, jl = end; j < jl; j += 3 ) { |
|
|
|
a = index.getX( j ); |
|
b = index.getX( j + 1 ); |
|
c = index.getX( j + 2 ); |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
groupMaterial, |
|
positionAttribute, |
|
morphPosition, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedPosition |
|
); |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
groupMaterial, |
|
normalAttribute, |
|
morphNormal, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedNormal |
|
); |
|
|
|
} |
|
|
|
} |
|
|
|
} else { |
|
|
|
start = Math.max( 0, drawRange.start ); |
|
end = Math.min( index.count, ( drawRange.start + drawRange.count ) ); |
|
|
|
for ( i = start, il = end; i < il; i += 3 ) { |
|
|
|
a = index.getX( i ); |
|
b = index.getX( i + 1 ); |
|
c = index.getX( i + 2 ); |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
material, |
|
positionAttribute, |
|
morphPosition, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedPosition |
|
); |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
material, |
|
normalAttribute, |
|
morphNormal, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedNormal |
|
); |
|
|
|
} |
|
|
|
} |
|
|
|
} else if ( positionAttribute !== undefined ) { |
|
|
|
// non-indexed buffer geometry |
|
|
|
if ( Array.isArray( material ) ) { |
|
|
|
for ( i = 0, il = groups.length; i < il; i ++ ) { |
|
|
|
group = groups[ i ]; |
|
groupMaterial = material[ group.materialIndex ]; |
|
|
|
start = Math.max( group.start, drawRange.start ); |
|
end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) ); |
|
|
|
for ( j = start, jl = end; j < jl; j += 3 ) { |
|
|
|
a = j; |
|
b = j + 1; |
|
c = j + 2; |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
groupMaterial, |
|
positionAttribute, |
|
morphPosition, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedPosition |
|
); |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
groupMaterial, |
|
normalAttribute, |
|
morphNormal, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedNormal |
|
); |
|
|
|
} |
|
|
|
} |
|
|
|
} else { |
|
|
|
start = Math.max( 0, drawRange.start ); |
|
end = Math.min( positionAttribute.count, ( drawRange.start + drawRange.count ) ); |
|
|
|
for ( i = start, il = end; i < il; i += 3 ) { |
|
|
|
a = i; |
|
b = i + 1; |
|
c = i + 2; |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
material, |
|
positionAttribute, |
|
morphPosition, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedPosition |
|
); |
|
|
|
_calculateMorphedAttributeData( |
|
object, |
|
material, |
|
normalAttribute, |
|
morphNormal, |
|
morphTargetsRelative, |
|
a, b, c, |
|
modifiedNormal |
|
); |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
const morphedPositionAttribute = new Float32BufferAttribute( modifiedPosition, 3 ); |
|
const morphedNormalAttribute = new Float32BufferAttribute( modifiedNormal, 3 ); |
|
|
|
return { |
|
|
|
positionAttribute: positionAttribute, |
|
normalAttribute: normalAttribute, |
|
morphedPositionAttribute: morphedPositionAttribute, |
|
morphedNormalAttribute: morphedNormalAttribute |
|
|
|
}; |
|
|
|
} |
|
|
|
|
|
|
|
export { |
|
computeTangents, |
|
mergeBufferGeometries, |
|
mergeBufferAttributes, |
|
interleaveAttributes, |
|
estimateBytesUsed, |
|
mergeVertices, |
|
toTrianglesDrawMode, |
|
computeMorphedAttributes, |
|
};
|
|
|