287 lines
9.4 KiB
JavaScript
287 lines
9.4 KiB
JavaScript
var _parseList = function(arr) {
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var ret = {};
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ret.index = arr[1];
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if (arr[0] === 'v') {
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ret.type = 'vertex';
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ret.x = arr[2];
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ret.y = arr[3];
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ret.z = arr[4];
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} else if (arr[0] === 'vt') {
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ret.type = 'texCoord';
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ret.x = arr[2];
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ret.y = arr[3];
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} else if (arr[0] === 'f') {
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ret.type = 'face';
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// Only Face3 are allowed
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vertexIndices = arr[2];
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textureIndices = arr[3];
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normalIndices = arr[4];
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// Vertex indices
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ret.a = vertexIndices[0];
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ret.b = vertexIndices[1];
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ret.c = vertexIndices[2];
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// Texutre indices (if they exist)
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if (textureIndices.length > 0) {
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ret.aTexture = textureIndices[0];
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ret.bTexture = textureIndices[1];
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ret.cTexture = textureIndices[2];
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}
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// Normal indices (if they exist)
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if (normalIndices.length > 0) {
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ret.aNormal = normalIndices[0];
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ret.bNormal = normalIndices[1];
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ret.cNormal = normalIndices[2];
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}
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} else if (arr[0] === 'vn') {
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// Normal
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ret.type = "normal";
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ret.x = arr[2];
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ret.y = arr[3];
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ret.z = arr[4];
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} else if (arr[0] === 'u') {
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// usemtl
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ret.index = -1;
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ret.type = 'usemtl';
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ret.materialName = arr[1];
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ret.vLength = arr[2];
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ret.fLength = arr[3];
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ret.texCoordsExist = arr[4];
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ret.normalsExist = arr[5];
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}
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return ret;
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}
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var ProgressiveLoader = function(path, scene, camera, callback) {
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// Init attributes
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this.objPath = path.substring(1, path.length);
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this.texturesPath = path.substring(0, path.lastIndexOf('/')) + '/';
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this.mtlPath = path.replace('.obj', '.mtl');
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this.scene = scene;
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this.callback = callback;
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this.counter = 0;
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this.obj = new THREE.Object3D();
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scene.add(this.obj);
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this.vertices = [];
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this.texCoords = [];
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this.normals = [];
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// Init MTLLoader
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this.loader = new THREE.MTLLoader(this.texturesPath);
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// Init io stuff
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this.socket = io();
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this.initIOCallbacks();
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this.camera = camera;
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}
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ProgressiveLoader.prototype.load = function() {
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var self = this;
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this.loader.load(self.mtlPath, function(materialCreator) {
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self.materialCreator = materialCreator;
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materialCreator.preload();
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self.start();
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});
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}
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ProgressiveLoader.prototype.initIOCallbacks = function() {
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var self = this;
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this.socket.on('ok', function() {
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console.log('ok');
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self.socket.emit('next');
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});
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this.socket.on('elements', function(arr) {
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// console.log("Received elements for the " + (++self.counter) + "th time !");
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for (var i = 0; i < arr.length; i++) {
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var elt = _parseList(arr[i]);
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// console.log(elts);
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if (elt.type === 'vertex') {
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// New vertex arrived
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self.vertices[elt.index] = [elt.x, elt.y, elt.z];
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} else if (elt.type === 'texCoord') {
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// New texCoord arrived
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self.texCoords[elt.index] = [elt.x, elt.y];
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} else if (elt.type === 'normal') {
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// New normal arrived
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self.normals[elt.index] = [elt.x, elt.y, elt.z];
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} else if (elt.type === 'usemtl') {
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if (self.currentMesh !== undefined) {
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self.currentMesh.geometry.computeBoundingSphere();
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if (self.currentMesh.geometry.attributes.normal === undefined) {
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self.currentMesh.geometry.computeVertexNormals();
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}
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}
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// Must create new mesh
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// console.log("New mesh arrived : " + elt.materialName);
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// Create mesh material
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var material;
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if (elt.materialName === null) {
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// If no material, create a default material
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material = new THREE.MeshLambertMaterial({color: 'red'});
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} else {
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// If material name exists, load if from material, and do a couple of settings
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material = self.materialCreator.materials[elt.materialName.trim()];
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material.side = THREE.DoubleSide;
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if (material.map)
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material.map.wrapS = material.map.wrapT = THREE.RepeatWrapping;
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}
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// Create mesh geometry
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var geometry = new THREE.BufferGeometry();
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geometry.dynamic = true;
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var positionArray = new Float32Array(elt.fLength * 3 * 3);
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var positionAttribute = new THREE.BufferAttribute(positionArray, 3);
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geometry.addAttribute('position', positionAttribute);
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// Add other attributes if necessary
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if (elt.texCoordsExist) {
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// console.log("Mesh with textures");
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var uvArray = new Float32Array(elt.fLength * 3 * 2);
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var uvAttribute = new THREE.BufferAttribute(uvArray, 2);
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geometry.addAttribute('uv', uvAttribute);
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}
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if (elt.normalsExist) {
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// console.log("Mesh with normals");
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var normalArray = new Float32Array(elt.fLength * 3 * 3);
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var normalAttribute = new THREE.BufferAttribute(normalArray, 3);
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geometry.addAttribute('normal', normalAttribute);
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}
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// Create mesh
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var mesh = new THREE.Mesh(geometry, material);
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self.currentMesh = mesh;
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self.obj.add(mesh);
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if (typeof self.callback === 'function') {
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self.callback(mesh);
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}
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} else if (elt.type === 'face') {
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// New face arrived : add it into current mesh
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 ] = self.vertices[elt.a][0];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 1] = self.vertices[elt.a][1];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 2] = self.vertices[elt.a][2];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 3] = self.vertices[elt.b][0];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 4] = self.vertices[elt.b][1];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 5] = self.vertices[elt.b][2];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 6] = self.vertices[elt.c][0];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 7] = self.vertices[elt.c][1];
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self.currentMesh.geometry.attributes.position.array[elt.index * 9 + 8] = self.vertices[elt.c][2];
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self.currentMesh.geometry.attributes.position.needsUpdate = true;
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// If normals
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if (elt.aNormal !== undefined) {
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 ] = self.normals[elt.aNormal][0];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 1] = self.normals[elt.aNormal][1];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 2] = self.normals[elt.aNormal][2];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 3] = self.normals[elt.bNormal][0];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 4] = self.normals[elt.bNormal][1];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 5] = self.normals[elt.bNormal][2];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 6] = self.normals[elt.cNormal][0];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 7] = self.normals[elt.cNormal][1];
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self.currentMesh.geometry.attributes.normal.array[elt.index * 9 + 8] = self.normals[elt.cNormal][2];
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self.currentMesh.geometry.attributes.normal.needsUpdate = true;
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}
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if (elt.aTexture !== undefined) {
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self.currentMesh.geometry.attributes.uv.array[elt.index * 6 ] = self.texCoords[elt.aTexture][0];
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self.currentMesh.geometry.attributes.uv.array[elt.index * 6 + 1] = self.texCoords[elt.aTexture][1];
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self.currentMesh.geometry.attributes.uv.array[elt.index * 6 + 2] = self.texCoords[elt.bTexture][0];
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self.currentMesh.geometry.attributes.uv.array[elt.index * 6 + 3] = self.texCoords[elt.bTexture][1];
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self.currentMesh.geometry.attributes.uv.array[elt.index * 6 + 4] = self.texCoords[elt.cTexture][0];
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self.currentMesh.geometry.attributes.uv.array[elt.index * 6 + 5] = self.texCoords[elt.cTexture][1];
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self.currentMesh.geometry.attributes.uv.needsUpdate = true;
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}
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}
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}
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// Ask for next elements
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self.socket.emit('next');
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});
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this.socket.on('disconnect', function() {
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console.log('Finished !');
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self.finished = true;
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});
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}
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ProgressiveLoader.prototype.start = function() {
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this.socket.emit('request', this.objPath);
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}
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