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index.js
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index.js
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import createXAtlasModule from "./build/xatlas_web.js"
import { expose } from "comlink";
let _onLoad = ()=>{} // we cannot put it in the object, otherwise we cannot access it from the outside
export class XAtlasAPI{
/**
* @param onLoad {Function}
* @param locateFile {Function} - should return path for xatlas_web.wasm, default is root of domain
* @param onAtlasProgress {Function} - called on progress update with mode {ProgressCategory} and counter
*/
constructor(onLoad, locateFile, onAtlasProgress) {
this.xatlas = null;
this.loaded = false;
_onLoad = onLoad || (()=>{});
this.atlasCreated = false;
/**
* @type {{meshId: number, vertices: Float32Array, normals: Float32Array|null, coords: Float32Array|null, meshObj: any}[]}
*/
this.meshes = [];
let params = {};
if (onAtlasProgress) params = {...params, onAtlasProgress};
const ctor = (loc)=>{
params = {...params, locateFile: ((path, dir)=> ( (loc && path === "xatlas_web.wasm") ? loc : dir+path) ) };
createXAtlasModule(params).then(m=>{this.moduleLoaded(m)});
}
if (locateFile) {
let pp = locateFile("xatlas_web.wasm", "");
if (pp&&pp.then) pp.then(ctor);
else ctor(pp);
}else ctor()
}
moduleLoaded(mod){
this.xatlas = mod;
this.loaded = true;
if(_onLoad) _onLoad();
}
createAtlas(){
this.xatlas.createAtlas();
this.meshes = [];
this.atlasCreated = true;
}
/**
*
* @param indexes {Uint16Array}
* @param vertices {Float32Array}
* @param normals {Float32Array}
* @param coords {Float32Array}
* @param meshObj {any}
* @param useNormals {boolean}
* @param useCoords {boolean}
* @param scale {number|[number, number, number]}
* @return {null | {indexes: (Float32Array | null), vertices: Float32Array, normals: (Float32Array | null), meshId: number, coords: (Float32Array | null), meshObj: any}}
*/
addMesh(indexes, vertices, normals=null, coords=null, meshObj=undefined, useNormals = false, useCoords = false, scale =1){
if(!this.loaded || !this.atlasCreated) throw "Create atlas first";
let meshDesc = this.xatlas.createMesh(vertices.length/3, indexes.length, normals != null && useNormals, coords != null && useCoords);
this.xatlas.HEAPU16.set(indexes, meshDesc.indexOffset/2);
let vs = new Float32Array([...vertices]);
if(scale!==1) {
if(typeof scale === "number") scale = [scale, scale, scale]
for (let i = 0, l = vs.length; i < l; i+=3) {
vs[i] *= scale[0];
vs[i+1] *= scale[1];
vs[i+2] *= scale[2];
}
}
this.xatlas.HEAPF32.set(vs, meshDesc.positionOffset/4);
if(normals != null && useNormals) this.xatlas.HEAPF32.set(normals, meshDesc.normalOffset/4);
if(coords != null && useCoords) this.xatlas.HEAPF32.set(coords, meshDesc.uvOffset/4);
let addMeshRes = this.xatlas.addMesh();
// this.xatlas._free(meshDesc.indexOffset); // should be done on c++ side
// this.xatlas._free(meshDesc.positionOffset);
if(addMeshRes !== 0) {
console.log("Error adding mesh: ", addMeshRes);
return null;
}
let ret = {
meshId: meshDesc.meshId,
meshObj: meshObj,
vertices: vertices,
normals: normals || null,
indexes: normals || null,
coords: coords || null,
};
this.meshes.push(ret);
return ret;
}
/**
* @param vertexCount
* @param indexCount
* @param normals
* @param coords
* @return {{meshId: number, indexOffset: number, positionOffset: number, normalOffset: number, uvOffset: number, meshObj: any}}
*/
createMesh(vertexCount, indexCount, normals, coords){
return this.xatlas.createMesh(vertexCount, indexCount, normals, coords);
}
// createUvMesh(vertexCount, indexCount){
// return this.xatlas.createUvMesh(vertexCount, indexCount);
// }
/**
* Result in coords1, input coords in coords
* @param chartOptions {{maxIterations: number, straightnessWeight: number, textureSeamWeight: number, maxChartArea: number, normalDeviationWeight: number, roundnessWeight: number, maxCost: number, maxBoundaryLength: number, normalSeamWeight: number}}
* @param packOptions {{maxChartSize: number, padding: number, bilinear: boolean, createImage: boolean, blockAlign: boolean, resolution: number, bruteForce: boolean, texelsPerUnit: number}}
* @param returnMeshes {boolean} - default = true
* @return {{vertex: {vertices: Float32Array, coords1: Float32Array, normals?: Float32Array, coords?: Float32Array}, index: Uint16Array, mesh: any}[]}
*/
generateAtlas(chartOptions, packOptions, returnMeshes = true){
if(!this.loaded || !this.atlasCreated) throw "Create atlas first";
if(this.meshes.length < 1) throw "Add meshes first";
chartOptions = { ...this.defaultChartOptions(), ...chartOptions};
packOptions = { ...this.defaultPackOptions(), ...packOptions };
this.xatlas.generateAtlas(chartOptions, packOptions);
if(!returnMeshes) return [];
let returnVal = [];
for (let {meshId, meshObj, vertices, normals, coords} of this.meshes){
let ret = this.getMeshData(meshId);
let index = new Uint16Array(this.xatlas.HEAPU32.subarray(ret.indexOffset/4, ret.indexOffset/4+ret.newIndexCount));
let oldIndexes = new Uint16Array(this.xatlas.HEAPU32.subarray(ret.originalIndexOffset/4, ret.originalIndexOffset/4+ret.newVertexCount));
let xcoords = new Float32Array(this.xatlas.HEAPF32.subarray(ret.uvOffset/4, ret.uvOffset/4+ret.newVertexCount*2));
this.xatlas.destroyMeshData(ret);
let vertex = {};
vertex.vertices = new Float32Array(ret.newVertexCount * 3);
vertex.coords1 = xcoords;
if(normals)
vertex.normals = new Float32Array(ret.newVertexCount * 3);
if(coords)
vertex.coords = new Float32Array(ret.newVertexCount * 2);
else vertex.coords = vertex.coords1;
for(let i =0, l=ret.newVertexCount; i<l; i++){
let oldIndex = oldIndexes[i];
vertex.vertices[3*i + 0] = vertices[3*oldIndex + 0];
vertex.vertices[3*i + 1] = vertices[3*oldIndex + 1];
vertex.vertices[3*i + 2] = vertices[3*oldIndex + 2];
if(vertex.normals&&normals){
vertex.normals[3*i + 0] = normals[3*oldIndex + 0];
vertex.normals[3*i + 1] = normals[3*oldIndex + 1];
vertex.normals[3*i + 2] = normals[3*oldIndex + 2];
}
if(vertex.coords&&coords){
vertex.coords[2*i + 0] = coords[2*oldIndex + 0];
vertex.coords[2*i + 1] = coords[2*oldIndex + 1];
}
}
returnVal.push({index: index, vertex: vertex, mesh: meshObj, vertexCount: ret.newVertexCount, oldIndexes: oldIndexes});
}
return returnVal;
}
defaultChartOptions() {
return {
fixWinding: false,
maxBoundaryLength: 0,
maxChartArea: 0,
maxCost: 2,
maxIterations: 1,
normalDeviationWeight: 2,
normalSeamWeight: 4,
roundnessWeight: 0.009999999776482582,
straightnessWeight: 6,
textureSeamWeight: 0.5,
useInputMeshUvs: false,
};
}
defaultPackOptions() {
return {
bilinear: true,
blockAlign: false,
bruteForce: false,
createImage: false,
maxChartSize: 0,
padding: 0,
resolution: 0,
rotateCharts: true,
rotateChartsToAxis: true,
texelsPerUnit: 0
};
}
setProgressLogging(flag){
this.xatlas.setProgressLogging(flag);
}
/**
* @param meshId
* @return {{newVertexCount: number, newIndexCount: number, indexOffset: number, originalIndexOffset: number, uvOffset: number}}
*/
getMeshData(meshId){
return this.xatlas.getMeshData(meshId);
}
/**
* @param data {{newVertexCount: number, newIndexCount: number, indexOffset: number, originalIndexOffset: number, uvOffset: number}}
* @return {*}
*/
destroyMeshData(data){
this.xatlas.destroyMeshData(data);
}
destroyAtlas(){
this.atlasCreated = false;
this.xatlas.destroyAtlas();
this.meshes = [];
this.xatlas.doLeakCheck();
}
}
expose(XAtlasAPI);