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1346 lines
30 KiB
1346 lines
30 KiB
import {
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BufferAttribute,
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BufferGeometry,
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Float32BufferAttribute,
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InstancedBufferAttribute,
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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() {
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throw new Error( 'BufferGeometryUtils: computeTangents renamed to computeMikkTSpaceTangents.' );
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}
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function computeMikkTSpaceTangents( geometry, MikkTSpace, negateSign = true ) {
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if ( ! MikkTSpace || ! MikkTSpace.isReady ) {
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throw new Error( 'BufferGeometryUtils: Initialized MikkTSpace library required.' );
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}
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if ( ! geometry.hasAttribute( 'position' ) || ! geometry.hasAttribute( 'normal' ) || ! geometry.hasAttribute( 'uv' ) ) {
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throw new Error( 'BufferGeometryUtils: Tangents require "position", "normal", and "uv" attributes.' );
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}
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function getAttributeArray( attribute ) {
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if ( attribute.normalized || attribute.isInterleavedBufferAttribute ) {
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const dstArray = new Float32Array( attribute.getCount() * attribute.itemSize );
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for ( let i = 0, j = 0; i < attribute.getCount(); i ++ ) {
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dstArray[ j ++ ] = attribute.getX( i );
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dstArray[ j ++ ] = attribute.getY( i );
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if ( attribute.itemSize > 2 ) {
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dstArray[ j ++ ] = attribute.getZ( i );
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}
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}
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return dstArray;
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}
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if ( attribute.array instanceof Float32Array ) {
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return attribute.array;
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}
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return new Float32Array( attribute.array );
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}
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// MikkTSpace algorithm requires non-indexed input.
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const _geometry = geometry.index ? geometry.toNonIndexed() : geometry;
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// Compute vertex tangents.
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const tangents = MikkTSpace.generateTangents(
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getAttributeArray( _geometry.attributes.position ),
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getAttributeArray( _geometry.attributes.normal ),
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getAttributeArray( _geometry.attributes.uv )
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);
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// Texture coordinate convention of glTF differs from the apparent
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// default of the MikkTSpace library; .w component must be flipped.
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if ( negateSign ) {
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for ( let i = 3; i < tangents.length; i += 4 ) {
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tangents[ i ] *= - 1;
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}
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}
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//
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_geometry.setAttribute( 'tangent', new BufferAttribute( tangents, 4 ) );
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if ( geometry !== _geometry ) {
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geometry.copy( _geometry );
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}
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return geometry;
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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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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 {BufferAttribute}
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* @return {BufferAttribute}
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*/
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export function deepCloneAttribute( attribute ) {
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if ( attribute.isInstancedInterleavedBufferAttribute || attribute.isInterleavedBufferAttribute ) {
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return deinterleaveAttribute( attribute );
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}
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if ( attribute.isInstancedBufferAttribute ) {
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return new InstancedBufferAttribute().copy( attribute );
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}
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return new BufferAttribute().copy( attribute );
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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 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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// returns a new, non-interleaved version of the provided attribute
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export function deinterleaveAttribute( attribute ) {
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const cons = attribute.data.array.constructor;
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const count = attribute.count;
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const itemSize = attribute.itemSize;
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const normalized = attribute.normalized;
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const array = new cons( count * itemSize );
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let newAttribute;
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if ( attribute.isInstancedInterleavedBufferAttribute ) {
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newAttribute = new InstancedBufferAttribute( array, itemSize, normalized, attribute.meshPerAttribute );
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} else {
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newAttribute = new BufferAttribute( array, itemSize, normalized );
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}
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for ( let i = 0; i < count; i ++ ) {
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newAttribute.setX( i, attribute.getX( i ) );
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if ( itemSize >= 2 ) {
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newAttribute.setY( i, attribute.getY( i ) );
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}
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if ( itemSize >= 3 ) {
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newAttribute.setZ( i, attribute.getZ( i ) );
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}
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if ( itemSize >= 4 ) {
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newAttribute.setW( i, attribute.getW( i ) );
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}
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}
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return newAttribute;
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}
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// deinterleaves all attributes on the geometry
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export function deinterleaveGeometry( geometry ) {
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const attributes = geometry.attributes;
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const morphTargets = geometry.morphTargets;
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const attrMap = new Map();
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for ( const key in attributes ) {
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const attr = attributes[ key ];
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if ( attr.isInterleavedBufferAttribute ) {
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if ( ! attrMap.has( attr ) ) {
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attrMap.set( attr, deinterleaveAttribute( attr ) );
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}
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attributes[ key ] = attrMap.get( attr );
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}
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}
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for ( const key in morphTargets ) {
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const attr = morphTargets[ key ];
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if ( attr.isInterleavedBufferAttribute ) {
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if ( ! attrMap.has( attr ) ) {
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attrMap.set( attr, deinterleaveAttribute( attr ) );
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}
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morphTargets[ key ] = attrMap.get( attr );
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}
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}
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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 tmpAttributes = {};
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const tmpMorphAttributes = {};
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const newIndices = [];
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const getters = [ 'getX', 'getY', 'getZ', 'getW' ];
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const setters = [ 'setX', 'setY', 'setZ', 'setW' ];
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// Initialize the arrays, allocating space conservatively. Extra
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// space will be trimmed in the last step.
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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 attr = geometry.attributes[ name ];
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tmpAttributes[ name ] = new BufferAttribute(
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new attr.array.constructor( attr.count * attr.itemSize ),
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attr.itemSize,
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attr.normalized
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);
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const morphAttr = geometry.morphAttributes[ name ];
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if ( morphAttr ) {
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tmpMorphAttributes[ name ] = new BufferAttribute(
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new morphAttr.array.constructor( morphAttr.count * morphAttr.itemSize ),
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morphAttr.itemSize,
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morphAttr.normalized
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);
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}
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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 ++ ) {
|
|
|
|
const index = indices ? indices.getX( i ) : i;
|
|
|
|
// Generate a hash for the vertex attributes at the current index 'i'
|
|
let hash = '';
|
|
for ( let j = 0, l = attributeNames.length; j < l; j ++ ) {
|
|
|
|
const name = attributeNames[ j ];
|
|
const attribute = geometry.getAttribute( name );
|
|
const itemSize = attribute.itemSize;
|
|
|
|
for ( let k = 0; k < itemSize; k ++ ) {
|
|
|
|
// double tilde truncates the decimal value
|
|
hash += `${ ~ ~ ( attribute[ getters[ k ] ]( index ) * shiftMultiplier ) },`;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Add another reference to the vertex if it's already
|
|
// used by another index
|
|
if ( hash in hashToIndex ) {
|
|
|
|
newIndices.push( hashToIndex[ hash ] );
|
|
|
|
} else {
|
|
|
|
// copy data to the new index in the temporary attributes
|
|
for ( let j = 0, l = attributeNames.length; j < l; j ++ ) {
|
|
|
|
const name = attributeNames[ j ];
|
|
const attribute = geometry.getAttribute( name );
|
|
const morphAttr = geometry.morphAttributes[ name ];
|
|
const itemSize = attribute.itemSize;
|
|
const newarray = tmpAttributes[ name ];
|
|
const newMorphArrays = tmpMorphAttributes[ name ];
|
|
|
|
for ( let k = 0; k < itemSize; k ++ ) {
|
|
|
|
const getterFunc = getters[ k ];
|
|
const setterFunc = setters[ k ];
|
|
newarray[ setterFunc ]( nextIndex, attribute[ getterFunc ]( index ) );
|
|
|
|
if ( morphAttr ) {
|
|
|
|
for ( let m = 0, ml = morphAttr.length; m < ml; m ++ ) {
|
|
|
|
newMorphArrays[ m ][ setterFunc ]( nextIndex, morphAttr[ m ][ getterFunc ]( index ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
hashToIndex[ hash ] = nextIndex;
|
|
newIndices.push( nextIndex );
|
|
nextIndex ++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// generate result BufferGeometry
|
|
const result = geometry.clone();
|
|
for ( const name in geometry.attributes ) {
|
|
|
|
const tmpAttribute = tmpAttributes[ name ];
|
|
|
|
result.setAttribute( name, new BufferAttribute(
|
|
tmpAttribute.array.slice( 0, nextIndex * tmpAttribute.itemSize ),
|
|
tmpAttribute.itemSize,
|
|
tmpAttribute.normalized,
|
|
) );
|
|
|
|
if ( ! ( name in tmpMorphAttributes ) ) continue;
|
|
|
|
for ( let j = 0; j < tmpMorphAttributes[ name ].length; j ++ ) {
|
|
|
|
const tmpMorphAttribute = tmpMorphAttributes[ name ][ j ];
|
|
|
|
result.morphAttributes[ name ][ j ] = new BufferAttribute(
|
|
tmpMorphAttribute.array.slice( 0, nextIndex * tmpMorphAttribute.itemSize ),
|
|
tmpMorphAttribute.itemSize,
|
|
tmpMorphAttribute.normalized,
|
|
);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// indices
|
|
|
|
result.setIndex( newIndices );
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
/**
|
|
* @param {BufferGeometry} geometry
|
|
* @param {number} drawMode
|
|
* @return {BufferGeometry}
|
|
*/
|
|
function toTrianglesDrawMode( geometry, drawMode ) {
|
|
|
|
if ( drawMode === TrianglesDrawMode ) {
|
|
|
|
console.warn( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Geometry already defined as triangles.' );
|
|
return geometry;
|
|
|
|
}
|
|
|
|
if ( drawMode === TriangleFanDrawMode || drawMode === TriangleStripDrawMode ) {
|
|
|
|
let index = geometry.getIndex();
|
|
|
|
// generate index if not present
|
|
|
|
if ( index === null ) {
|
|
|
|
const indices = [];
|
|
|
|
const position = geometry.getAttribute( 'position' );
|
|
|
|
if ( position !== undefined ) {
|
|
|
|
for ( let i = 0; i < position.count; i ++ ) {
|
|
|
|
indices.push( i );
|
|
|
|
}
|
|
|
|
geometry.setIndex( indices );
|
|
index = geometry.getIndex();
|
|
|
|
} else {
|
|
|
|
console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.' );
|
|
return geometry;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
|
|
const numberOfTriangles = index.count - 2;
|
|
const newIndices = [];
|
|
|
|
if ( drawMode === TriangleFanDrawMode ) {
|
|
|
|
// gl.TRIANGLE_FAN
|
|
|
|
for ( let i = 1; i <= numberOfTriangles; i ++ ) {
|
|
|
|
newIndices.push( index.getX( 0 ) );
|
|
newIndices.push( index.getX( i ) );
|
|
newIndices.push( index.getX( i + 1 ) );
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// gl.TRIANGLE_STRIP
|
|
|
|
for ( let i = 0; i < numberOfTriangles; i ++ ) {
|
|
|
|
if ( i % 2 === 0 ) {
|
|
|
|
newIndices.push( index.getX( i ) );
|
|
newIndices.push( index.getX( i + 1 ) );
|
|
newIndices.push( index.getX( i + 2 ) );
|
|
|
|
} else {
|
|
|
|
newIndices.push( index.getX( i + 2 ) );
|
|
newIndices.push( index.getX( i + 1 ) );
|
|
newIndices.push( index.getX( i ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {
|
|
|
|
console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );
|
|
|
|
}
|
|
|
|
// build final geometry
|
|
|
|
const newGeometry = geometry.clone();
|
|
newGeometry.setIndex( newIndices );
|
|
newGeometry.clearGroups();
|
|
|
|
return newGeometry;
|
|
|
|
} else {
|
|
|
|
console.error( 'THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unknown draw mode:', drawMode );
|
|
return geometry;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Calculates the morphed attributes of a morphed/skinned BufferGeometry.
|
|
* Helpful for Raytracing or Decals.
|
|
* @param {Mesh | Line | Points} object An instance of Mesh, Line or Points.
|
|
* @return {Object} An Object with original position/normal attributes and morphed ones.
|
|
*/
|
|
function computeMorphedAttributes( object ) {
|
|
|
|
if ( object.geometry.isBufferGeometry !== true ) {
|
|
|
|
console.error( 'THREE.BufferGeometryUtils: Geometry is not of type BufferGeometry.' );
|
|
return null;
|
|
|
|
}
|
|
|
|
const _vA = new Vector3();
|
|
const _vB = new Vector3();
|
|
const _vC = new Vector3();
|
|
|
|
const _tempA = new Vector3();
|
|
const _tempB = new Vector3();
|
|
const _tempC = new Vector3();
|
|
|
|
const _morphA = new Vector3();
|
|
const _morphB = new Vector3();
|
|
const _morphC = new Vector3();
|
|
|
|
function _calculateMorphedAttributeData(
|
|
object,
|
|
attribute,
|
|
morphAttribute,
|
|
morphTargetsRelative,
|
|
a,
|
|
b,
|
|
c,
|
|
modifiedAttributeArray
|
|
) {
|
|
|
|
_vA.fromBufferAttribute( attribute, a );
|
|
_vB.fromBufferAttribute( attribute, b );
|
|
_vC.fromBufferAttribute( attribute, c );
|
|
|
|
const morphInfluences = object.morphTargetInfluences;
|
|
|
|
if ( 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;
|
|
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 ];
|
|
|
|
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,
|
|
positionAttribute,
|
|
morphPosition,
|
|
morphTargetsRelative,
|
|
a, b, c,
|
|
modifiedPosition
|
|
);
|
|
|
|
_calculateMorphedAttributeData(
|
|
object,
|
|
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,
|
|
positionAttribute,
|
|
morphPosition,
|
|
morphTargetsRelative,
|
|
a, b, c,
|
|
modifiedPosition
|
|
);
|
|
|
|
_calculateMorphedAttributeData(
|
|
object,
|
|
normalAttribute,
|
|
morphNormal,
|
|
morphTargetsRelative,
|
|
a, b, c,
|
|
modifiedNormal
|
|
);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// non-indexed buffer geometry
|
|
|
|
if ( Array.isArray( material ) ) {
|
|
|
|
for ( i = 0, il = groups.length; i < il; i ++ ) {
|
|
|
|
group = groups[ i ];
|
|
|
|
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,
|
|
positionAttribute,
|
|
morphPosition,
|
|
morphTargetsRelative,
|
|
a, b, c,
|
|
modifiedPosition
|
|
);
|
|
|
|
_calculateMorphedAttributeData(
|
|
object,
|
|
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,
|
|
positionAttribute,
|
|
morphPosition,
|
|
morphTargetsRelative,
|
|
a, b, c,
|
|
modifiedPosition
|
|
);
|
|
|
|
_calculateMorphedAttributeData(
|
|
object,
|
|
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
|
|
|
|
};
|
|
|
|
}
|
|
|
|
function mergeGroups( geometry ) {
|
|
|
|
if ( geometry.groups.length === 0 ) {
|
|
|
|
console.warn( 'THREE.BufferGeometryUtils.mergeGroups(): No groups are defined. Nothing to merge.' );
|
|
return geometry;
|
|
|
|
}
|
|
|
|
let groups = geometry.groups;
|
|
|
|
// sort groups by material index
|
|
|
|
groups = groups.sort( ( a, b ) => {
|
|
|
|
if ( a.materialIndex !== b.materialIndex ) return a.materialIndex - b.materialIndex;
|
|
|
|
return a.start - b.start;
|
|
|
|
} );
|
|
|
|
// create index for non-indexed geometries
|
|
|
|
if ( geometry.getIndex() === null ) {
|
|
|
|
const positionAttribute = geometry.getAttribute( 'position' );
|
|
const indices = [];
|
|
|
|
for ( let i = 0; i < positionAttribute.count; i += 3 ) {
|
|
|
|
indices.push( i, i + 1, i + 2 );
|
|
|
|
}
|
|
|
|
geometry.setIndex( indices );
|
|
|
|
}
|
|
|
|
// sort index
|
|
|
|
const index = geometry.getIndex();
|
|
|
|
const newIndices = [];
|
|
|
|
for ( let i = 0; i < groups.length; i ++ ) {
|
|
|
|
const group = groups[ i ];
|
|
|
|
const groupStart = group.start;
|
|
const groupLength = groupStart + group.count;
|
|
|
|
for ( let j = groupStart; j < groupLength; j ++ ) {
|
|
|
|
newIndices.push( index.getX( j ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
geometry.dispose(); // Required to force buffer recreation
|
|
geometry.setIndex( newIndices );
|
|
|
|
// update groups indices
|
|
|
|
let start = 0;
|
|
|
|
for ( let i = 0; i < groups.length; i ++ ) {
|
|
|
|
const group = groups[ i ];
|
|
|
|
group.start = start;
|
|
start += group.count;
|
|
|
|
}
|
|
|
|
// merge groups
|
|
|
|
let currentGroup = groups[ 0 ];
|
|
|
|
geometry.groups = [ currentGroup ];
|
|
|
|
for ( let i = 1; i < groups.length; i ++ ) {
|
|
|
|
const group = groups[ i ];
|
|
|
|
if ( currentGroup.materialIndex === group.materialIndex ) {
|
|
|
|
currentGroup.count += group.count;
|
|
|
|
} else {
|
|
|
|
currentGroup = group;
|
|
geometry.groups.push( currentGroup );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return geometry;
|
|
|
|
}
|
|
|
|
|
|
// Creates a new, non-indexed geometry with smooth normals everywhere except faces that meet at
|
|
// an angle greater than the crease angle.
|
|
function toCreasedNormals( geometry, creaseAngle = Math.PI / 3 /* 60 degrees */ ) {
|
|
|
|
const creaseDot = Math.cos( creaseAngle );
|
|
const hashMultiplier = ( 1 + 1e-10 ) * 1e2;
|
|
|
|
// reusable vertors
|
|
const verts = [ new Vector3(), new Vector3(), new Vector3() ];
|
|
const tempVec1 = new Vector3();
|
|
const tempVec2 = new Vector3();
|
|
const tempNorm = new Vector3();
|
|
const tempNorm2 = new Vector3();
|
|
|
|
// hashes a vector
|
|
function hashVertex( v ) {
|
|
|
|
const x = ~ ~ ( v.x * hashMultiplier );
|
|
const y = ~ ~ ( v.y * hashMultiplier );
|
|
const z = ~ ~ ( v.z * hashMultiplier );
|
|
return `${x},${y},${z}`;
|
|
|
|
}
|
|
|
|
const resultGeometry = geometry.toNonIndexed();
|
|
const posAttr = resultGeometry.attributes.position;
|
|
const vertexMap = {};
|
|
|
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// find all the normals shared by commonly located vertices
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for ( let i = 0, l = posAttr.count / 3; i < l; i ++ ) {
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const i3 = 3 * i;
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const a = verts[ 0 ].fromBufferAttribute( posAttr, i3 + 0 );
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const b = verts[ 1 ].fromBufferAttribute( posAttr, i3 + 1 );
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const c = verts[ 2 ].fromBufferAttribute( posAttr, i3 + 2 );
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|
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tempVec1.subVectors( c, b );
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tempVec2.subVectors( a, b );
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|
|
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// add the normal to the map for all vertices
|
|
const normal = new Vector3().crossVectors( tempVec1, tempVec2 ).normalize();
|
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for ( let n = 0; n < 3; n ++ ) {
|
|
|
|
const vert = verts[ n ];
|
|
const hash = hashVertex( vert );
|
|
if ( ! ( hash in vertexMap ) ) {
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|
|
|
vertexMap[ hash ] = [];
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|
|
|
}
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|
|
|
vertexMap[ hash ].push( normal );
|
|
|
|
}
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|
|
|
}
|
|
|
|
// average normals from all vertices that share a common location if they are within the
|
|
// provided crease threshold
|
|
const normalArray = new Float32Array( posAttr.count * 3 );
|
|
const normAttr = new BufferAttribute( normalArray, 3, false );
|
|
for ( let i = 0, l = posAttr.count / 3; i < l; i ++ ) {
|
|
|
|
// get the face normal for this vertex
|
|
const i3 = 3 * i;
|
|
const a = verts[ 0 ].fromBufferAttribute( posAttr, i3 + 0 );
|
|
const b = verts[ 1 ].fromBufferAttribute( posAttr, i3 + 1 );
|
|
const c = verts[ 2 ].fromBufferAttribute( posAttr, i3 + 2 );
|
|
|
|
tempVec1.subVectors( c, b );
|
|
tempVec2.subVectors( a, b );
|
|
|
|
tempNorm.crossVectors( tempVec1, tempVec2 ).normalize();
|
|
|
|
// average all normals that meet the threshold and set the normal value
|
|
for ( let n = 0; n < 3; n ++ ) {
|
|
|
|
const vert = verts[ n ];
|
|
const hash = hashVertex( vert );
|
|
const otherNormals = vertexMap[ hash ];
|
|
tempNorm2.set( 0, 0, 0 );
|
|
|
|
for ( let k = 0, lk = otherNormals.length; k < lk; k ++ ) {
|
|
|
|
const otherNorm = otherNormals[ k ];
|
|
if ( tempNorm.dot( otherNorm ) > creaseDot ) {
|
|
|
|
tempNorm2.add( otherNorm );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
tempNorm2.normalize();
|
|
normAttr.setXYZ( i3 + n, tempNorm2.x, tempNorm2.y, tempNorm2.z );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
resultGeometry.setAttribute( 'normal', normAttr );
|
|
return resultGeometry;
|
|
|
|
}
|
|
|
|
export {
|
|
computeTangents,
|
|
computeMikkTSpaceTangents,
|
|
mergeBufferGeometries,
|
|
mergeBufferAttributes,
|
|
interleaveAttributes,
|
|
estimateBytesUsed,
|
|
mergeVertices,
|
|
toTrianglesDrawMode,
|
|
computeMorphedAttributes,
|
|
mergeGroups,
|
|
toCreasedNormals
|
|
};
|
|
|