mirror of
https://github.com/filecoin-project/slate.git
synced 2024-12-28 19:42:01 +03:00
826 lines
24 KiB
JavaScript
826 lines
24 KiB
JavaScript
import * as THREE from "three";
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export const BufferGeometryUtils = {
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computeTangents: function (geometry) {
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geometry.computeTangents();
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console.warn(
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"THREE.BufferGeometryUtils: .computeTangents() has been removed. Use BufferGeometry.computeTangents() instead."
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);
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},
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/**
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* @param {Array<THREE.BufferGeometry>} geometries
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* @param {Boolean} useGroups
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* @return {THREE.BufferGeometry}
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*/
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mergeBufferGeometries: function (geometries, useGroups) {
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var isIndexed = geometries[0].index !== null;
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var attributesUsed = new Set(Object.keys(geometries[0].attributes));
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var morphAttributesUsed = new Set(Object.keys(geometries[0].morphAttributes));
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var attributes = {};
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var morphAttributes = {};
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var morphTargetsRelative = geometries[0].morphTargetsRelative;
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var mergedGeometry = new THREE.BufferGeometry();
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var offset = 0;
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for (var i = 0; i < geometries.length; ++i) {
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var geometry = geometries[i];
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var 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(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index " +
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i +
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". All geometries must have compatible attributes; make sure index attribute exists among all geometries, or in none of them."
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);
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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 (var name in geometry.attributes) {
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if (!attributesUsed.has(name)) {
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console.error(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index " +
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i +
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'. All geometries must have compatible attributes; make sure "' +
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name +
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'" attribute exists among all geometries, or in none of them.'
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);
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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(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index " +
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i +
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". Make sure all geometries have the same number of attributes."
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);
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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(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index " +
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i +
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". .morphTargetsRelative must be consistent throughout all geometries."
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);
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return null;
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}
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for (var name in geometry.morphAttributes) {
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if (!morphAttributesUsed.has(name)) {
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console.error(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index " +
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i +
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". .morphAttributes must be consistent throughout all geometries."
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);
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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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var 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(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed with geometry at index " +
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i +
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". The geometry must have either an index or a position attribute"
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);
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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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var indexOffset = 0;
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var mergedIndex = [];
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for (var i = 0; i < geometries.length; ++i) {
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var index = geometries[i].index;
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for (var 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 (var name in attributes) {
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var mergedAttribute = this.mergeBufferAttributes(attributes[name]);
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if (!mergedAttribute) {
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console.error(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed while trying to merge the " +
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name +
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" attribute."
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);
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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 (var name in morphAttributes) {
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var 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 (var i = 0; i < numMorphTargets; ++i) {
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var morphAttributesToMerge = [];
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for (var 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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var mergedMorphAttribute = this.mergeBufferAttributes(morphAttributesToMerge);
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if (!mergedMorphAttribute) {
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console.error(
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"THREE.BufferGeometryUtils: .mergeBufferGeometries() failed while trying to merge the " +
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name +
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" morphAttribute."
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);
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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<THREE.BufferAttribute>} attributes
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* @return {THREE.BufferAttribute}
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*/
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mergeBufferAttributes: function (attributes) {
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var TypedArray;
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var itemSize;
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var normalized;
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var arrayLength = 0;
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for (var i = 0; i < attributes.length; ++i) {
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var attribute = attributes[i];
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if (attribute.isInterleavedBufferAttribute) {
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console.error(
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"THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. InterleavedBufferAttributes are not supported."
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);
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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(
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"THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. BufferAttribute.array must be of consistent array types across matching attributes."
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);
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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(
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"THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. BufferAttribute.itemSize must be consistent across matching attributes."
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);
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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(
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"THREE.BufferGeometryUtils: .mergeBufferAttributes() failed. BufferAttribute.normalized must be consistent across matching attributes."
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);
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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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var array = new TypedArray(arrayLength);
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var offset = 0;
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for (var i = 0; i < attributes.length; ++i) {
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array.set(attributes[i].array, offset);
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offset += attributes[i].array.length;
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}
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return new THREE.BufferAttribute(array, itemSize, normalized);
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},
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/**
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* @param {Array<THREE.BufferAttribute>} attributes
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* @return {Array<THREE.InterleavedBufferAttribute>}
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*/
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interleaveAttributes: function (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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var TypedArray;
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var arrayLength = 0;
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var stride = 0;
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// calculate the the length and type of the interleavedBuffer
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for (var i = 0, l = attributes.length; i < l; ++i) {
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var 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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var interleavedBuffer = new THREE.InterleavedBuffer(new TypedArray(arrayLength), stride);
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var offset = 0;
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var res = [];
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var getters = ["getX", "getY", "getZ", "getW"];
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var setters = ["setX", "setY", "setZ", "setW"];
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for (var j = 0, l = attributes.length; j < l; j++) {
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var attribute = attributes[j];
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var itemSize = attribute.itemSize;
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var count = attribute.count;
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var iba = new THREE.InterleavedBufferAttribute(
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interleavedBuffer,
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itemSize,
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offset,
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attribute.normalized
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);
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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 (var c = 0; c < count; c++) {
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for (var 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<THREE.BufferGeometry>} geometry
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* @return {number}
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*/
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estimateBytesUsed: function (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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var mem = 0;
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for (var name in geometry.attributes) {
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var 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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var 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 {THREE.BufferGeometry} geometry
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* @param {number} tolerance
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* @return {THREE.BufferGeometry>}
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*/
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mergeVertices: function (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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var hashToIndex = {};
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var indices = geometry.getIndex();
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var positions = geometry.getAttribute("position");
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var vertexCount = indices ? indices.count : positions.count;
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// next value for triangle indices
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var nextIndex = 0;
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// attributes and new attribute arrays
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var attributeNames = Object.keys(geometry.attributes);
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var attrArrays = {};
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var morphAttrsArrays = {};
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var newIndices = [];
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var getters = ["getX", "getY", "getZ", "getW"];
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// initialize the arrays
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for (var i = 0, l = attributeNames.length; i < l; i++) {
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var name = attributeNames[i];
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attrArrays[name] = [];
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var 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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var decimalShift = Math.log10(1 / tolerance);
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var shiftMultiplier = Math.pow(10, decimalShift);
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for (var i = 0; i < vertexCount; i++) {
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var 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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var hash = "";
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for (var j = 0, l = attributeNames.length; j < l; j++) {
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var name = attributeNames[j];
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var attribute = geometry.getAttribute(name);
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var itemSize = attribute.itemSize;
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for (var 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 (var j = 0, l = attributeNames.length; j < l; j++) {
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var name = attributeNames[j];
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var attribute = geometry.getAttribute(name);
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var morphAttr = geometry.morphAttributes[name];
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var itemSize = attribute.itemSize;
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var newarray = attrArrays[name];
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var newMorphArrays = morphAttrsArrays[name];
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for (var k = 0; k < itemSize; k++) {
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var getterFunc = getters[k];
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newarray.push(attribute[getterFunc](index));
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if (morphAttr) {
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for (var 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 (var i = 0, l = attributeNames.length; i < l; i++) {
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var name = attributeNames[i];
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var oldAttribute = geometry.getAttribute(name);
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var buffer = new oldAttribute.array.constructor(attrArrays[name]);
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var attribute = new THREE.BufferAttribute(
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buffer,
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oldAttribute.itemSize,
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oldAttribute.normalized
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);
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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 (var j = 0; j < morphAttrsArrays[name].length; j++) {
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var oldMorphAttribute = geometry.morphAttributes[name][j];
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var buffer = new oldMorphAttribute.array.constructor(morphAttrsArrays[name][j]);
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var morphAttribute = new THREE.BufferAttribute(
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buffer,
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oldMorphAttribute.itemSize,
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oldMorphAttribute.normalized
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);
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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 {THREE.BufferGeometry} geometry
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* @param {number} drawMode
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* @return {THREE.BufferGeometry>}
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*/
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toTrianglesDrawMode: function (geometry, drawMode) {
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if (drawMode === THREE.TrianglesDrawMode) {
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console.warn(
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"THREE.BufferGeometryUtils.toTrianglesDrawMode(): Geometry already defined as triangles."
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);
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return geometry;
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}
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if (drawMode === THREE.TriangleFanDrawMode || drawMode === THREE.TriangleStripDrawMode) {
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var index = geometry.getIndex();
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// generate index if not present
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if (index === null) {
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var indices = [];
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var position = geometry.getAttribute("position");
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if (position !== undefined) {
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for (var 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(
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"THREE.BufferGeometryUtils.toTrianglesDrawMode(): Undefined position attribute. Processing not possible."
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);
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return geometry;
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}
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}
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//
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var numberOfTriangles = index.count - 2;
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var newIndices = [];
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if (drawMode === THREE.TriangleFanDrawMode) {
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// gl.TRIANGLE_FAN
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for (var 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 (var 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(
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"THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unable to generate correct amount of triangles."
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);
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}
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// build final geometry
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var 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(
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"THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unknown draw mode:",
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drawMode
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);
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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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*/
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computeMorphedAttributes: function (object) {
|
|
if (object.geometry.isBufferGeometry !== true) {
|
|
console.error("THREE.BufferGeometryUtils: Geometry is not of type THREE.BufferGeometry.");
|
|
return null;
|
|
}
|
|
|
|
var _vA = new THREE.Vector3();
|
|
var _vB = new THREE.Vector3();
|
|
var _vC = new THREE.Vector3();
|
|
|
|
var _tempA = new THREE.Vector3();
|
|
var _tempB = new THREE.Vector3();
|
|
var _tempC = new THREE.Vector3();
|
|
|
|
var _morphA = new THREE.Vector3();
|
|
var _morphB = new THREE.Vector3();
|
|
var _morphC = new THREE.Vector3();
|
|
|
|
function _calculateMorphedAttributeData(
|
|
object,
|
|
material,
|
|
attribute,
|
|
morphAttribute,
|
|
morphTargetsRelative,
|
|
a,
|
|
b,
|
|
c,
|
|
modifiedAttributeArray
|
|
) {
|
|
_vA.fromBufferAttribute(attribute, a);
|
|
_vB.fromBufferAttribute(attribute, b);
|
|
_vC.fromBufferAttribute(attribute, c);
|
|
|
|
var morphInfluences = object.morphTargetInfluences;
|
|
|
|
if (material.morphTargets && morphAttribute && morphInfluences) {
|
|
_morphA.set(0, 0, 0);
|
|
_morphB.set(0, 0, 0);
|
|
_morphC.set(0, 0, 0);
|
|
|
|
for (var i = 0, il = morphAttribute.length; i < il; i++) {
|
|
var influence = morphInfluences[i];
|
|
var 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;
|
|
}
|
|
|
|
var geometry = object.geometry;
|
|
var material = object.material;
|
|
|
|
var a, b, c;
|
|
var index = geometry.index;
|
|
var positionAttribute = geometry.attributes.position;
|
|
var morphPosition = geometry.morphAttributes.position;
|
|
var morphTargetsRelative = geometry.morphTargetsRelative;
|
|
var normalAttribute = geometry.attributes.normal;
|
|
var morphNormal = geometry.morphAttributes.position;
|
|
|
|
var groups = geometry.groups;
|
|
var drawRange = geometry.drawRange;
|
|
var i, j, il, jl;
|
|
var group, groupMaterial;
|
|
var start, end;
|
|
|
|
var modifiedPosition = new Float32Array(positionAttribute.count * positionAttribute.itemSize);
|
|
var 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
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
var morphedPositionAttribute = new THREE.Float32BufferAttribute(modifiedPosition, 3);
|
|
var morphedNormalAttribute = new THREE.Float32BufferAttribute(modifiedNormal, 3);
|
|
|
|
return {
|
|
positionAttribute: positionAttribute,
|
|
normalAttribute: normalAttribute,
|
|
morphedPositionAttribute: morphedPositionAttribute,
|
|
morphedNormalAttribute: morphedNormalAttribute,
|
|
};
|
|
},
|
|
};
|