769 lines
20 KiB
JavaScript
769 lines
20 KiB
JavaScript
var fs = require('fs');
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var THREE = require('three');
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var L3D = require('../../static/js/l3d.min.js');
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function readIt(sceneNumber, recoId) {
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var toZip = {
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triangles :
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JSON.parse(fs.readFileSync('./geo/generated/scene' + sceneNumber + '/triangles' + recoId + '.json')),
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areas :
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JSON.parse(fs.readFileSync('./geo/generated/scene' + sceneNumber + '/areas' + recoId + '.json'))
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};
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var ret = [];
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for (var i = 0; i < toZip.triangles.length; i++) {
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ret.push({
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index: toZip.triangles[i],
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area: toZip.areas[i]
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});
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}
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return ret;
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}
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numberOfReco = [0, 0, 12, 12, 11, 2];
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function readAll(sceneNumber) {
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var ret = [];
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for (var i = 0; i < numberOfReco[sceneNumber]; i++) {
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ret.push(readIt(sceneNumber, i));
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}
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return ret;
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}
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try
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{
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var predictionTables = [
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JSON.parse(fs.readFileSync('./geo/mat1.json')),
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JSON.parse(fs.readFileSync('./geo/mat2.json')),
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JSON.parse(fs.readFileSync('./geo/mat3.json')),
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[[1,1],
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[1,2]]
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];
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var facesToSend = [
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readAll(2),
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readAll(3),
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readAll(4),
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readAll(5)
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];
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} catch (e) {
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process.stderr.write('No prefetching will be done !');
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predictionTables = [];
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}
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/**
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* Checks quickly if a triangle might be in a frustum
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* @private
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* @param {Object[]} element array of thre 3 vertices of the triangle to test
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* @param {Object[]} planes array of planes (Object with normal and constant values)
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* @return {Boolean} false if we can be sure that the triangle is not in the frustum, true oherwise
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*/
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function isInFrustum(element, planes) {
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if (element instanceof Array) {
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var outcodes = [];
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for (var i = 0; i < element.length; i++) {
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var vertex = element[i];
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var currentOutcode = "";
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for (var j = 0; j < planes.length; j++) {
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var plane = planes[j];
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distance =
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plane.normal.x * vertex.x +
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plane.normal.y * vertex.y +
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plane.normal.z * vertex.z +
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plane.constant;
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// if (distance < 0) {
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// exitToContinue = true;
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// break;
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// }
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currentOutcode += distance > 0 ? '0' : '1';
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}
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outcodes.push(parseInt(currentOutcode,2));
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}
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// http://vterrain.org/LOD/culling.html
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// I have no idea what i'm doing
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// http://i.kinja-img.com/gawker-media/image/upload/japbcvpavbzau9dbuaxf.jpg
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// But it seems to work
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// EDIT : Not, this should be ok http://www.cs.unc.edu/~blloyd/comp770/Lecture07.pdf
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if ((outcodes[0] | outcodes[1] | outcodes[2]) === 0) {
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return true;
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} else if ((outcodes[0] & outcodes[1] & outcodes[2]) !== 0) {
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return false;
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} else {
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// part of the triangle is inside the viewing volume
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return true;
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}
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}
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}
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/**
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* A class that streams easily a mesh via socket.io
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* @memberOf geo
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* @constructor
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* @param {string} path to the mesh
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*/
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geo.MeshStreamer = function(path) {
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/**
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* array of array telling if the jth face of the ith mesh has already been sent
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*
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* For each mesh, there is an object containing
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* <ul>
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* <li>`counter` : the number of faces currently sent</li>
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* <li>`array` : an array boolean telling if the ith face has already been sent</li>
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* </ul>
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* @type {Object[]}
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*/
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this.meshFaces = [];
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/**
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* array of booleans telling if the ith vertex has already been sent
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* @type {Boolean[]}
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*/
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this.vertices = [];
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/**
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* array of booleans telling if the ith face has already been sent
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* @type {Boolean[]}
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*/
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this.faces = [];
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/**
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* array of booleans telling if the ith normal has already been sent
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* @type {Boolean[]}
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*/
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this.normals = [];
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/**
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* array of booleans telling if the ith texCoord has already been sent
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* @type {Boolean[]}
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*/
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this.texCoords = [];
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this.beginningThreshold = 0.9;
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this.frustumPercentage = 0.6;
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this.prefetchPercentage = 1 - this.frustumPercentage;
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/**
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* Number of element to send by packet
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* @type {Number}
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*/
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// this.chunk = 100000;
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this.chunk = 1250;
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this.previousReco = 0;
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if (path !== undefined) {
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this.mesh = geo.availableMeshes[path];
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}
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};
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/**
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* Checks if a face is oriented towards the camera
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* @param {Object} camera a camera (with a position, and a direction)
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* @param {geo.Face} the face to test
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* @return {Boolean} true if the face is in the good orientation, face otherwise
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*/
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geo.MeshStreamer.prototype.isBackFace = function(camera, face) {
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var directionCamera = L3D.Tools.diff(
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L3D.Tools.mul(
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L3D.Tools.sum(
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L3D.Tools.sum(
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this.mesh.vertices[face.a],
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this.mesh.vertices[face.b]
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),
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this.mesh.vertices[face.c]
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),
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1/3),
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camera.position
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);
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var v1 = L3D.Tools.diff(this.mesh.vertices[face.b], this.mesh.vertices[face.a]);
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var v2 = L3D.Tools.diff(this.mesh.vertices[face.c], this.mesh.vertices[face.a]);
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var normal = L3D.Tools.cross(v1, v2);
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return L3D.Tools.dot(directionCamera, normal) > 0;
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};
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/**
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* Compute a function that can compare two faces
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* @param {Camera} camera a camera seeing or not face
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* @returns {function} the function that compares two faces : the higher face is the most interesting for the camera
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*/
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geo.MeshStreamer.prototype.faceComparator = function(camera) {
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var self = this;
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return function(face1, face2) {
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var center1 = {
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x: (self.mesh.vertices[face1.a].x + self.mesh.vertices[face1.b].x + self.mesh.vertices[face1.c].x) / 3,
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y: (self.mesh.vertices[face1.a].y + self.mesh.vertices[face1.b].y + self.mesh.vertices[face1.c].y) / 3,
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z: (self.mesh.vertices[face1.a].z + self.mesh.vertices[face1.b].z + self.mesh.vertices[face1.c].z) / 3
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};
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var dir1 = {
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x: center1.x - camera.position.x,
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y: center1.y - camera.position.y,
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z: center1.z - camera.position.z
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};
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var dot1 = dir1.x * dir1.x + dir1.y * dir1.y + dir1.z * dir1.z;
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var center2 = {
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x: (self.mesh.vertices[face2.a].x + self.mesh.vertices[face2.b].x + self.mesh.vertices[face2.c].x) / 3,
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y: (self.mesh.vertices[face2.a].y + self.mesh.vertices[face2.b].y + self.mesh.vertices[face2.c].y) / 3,
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z: (self.mesh.vertices[face2.a].z + self.mesh.vertices[face2.b].z + self.mesh.vertices[face2.c].z) / 3
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};
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var dir2 = {
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x: center2.x - camera.position.x,
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y: center2.y - camera.position.y,
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z: center2.z - camera.position.z
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};
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var dot2 = dir2.x * dir2.x + dir2.y * dir2.y + dir2.z * dir2.z;
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// Decreasing order
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if (dot1 < dot2) {
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return -1;
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}
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if (dot1 > dot2) {
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return 1;
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}
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return 0;
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};
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};
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/**
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* Initialize the socket.io callbacks
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* @param {socket} socket the socket to initialize
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*/
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geo.MeshStreamer.prototype.start = function(socket) {
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this.socket = socket;
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var self = this;
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socket.on('request', function(path, laggy, prefetch) {
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if (laggy === true) {
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self.chunk = 1;
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}
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self.mesh = geo.availableMeshes[path];
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switch (path) {
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case '/static/data/bobomb/bobomb battlefeild.obj':
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case '/static/data/bobomb/bobomb battlefeild_sub.obj':
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self.predictionTable = predictionTables[0];
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self.facesToSend = facesToSend[0];
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break;
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case '/static/data/mountain/coocoolmountain.obj':
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case '/static/data/mountain/coocoolmountain_sub.obj':
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self.predictionTable = predictionTables[1];
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self.facesToSend = facesToSend[1];
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break;
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case '/static/data/whomp/Whomps Fortress.obj':
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case '/static/data/whomp/Whomps Fortress_sub.obj':
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self.predictionTable = predictionTables[2];
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self.facesToSend = facesToSend[2];
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break;
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case '/static/data/sponza/sponza.obj':
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self.predictionTable = predictionTables[3];
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self.facesToSend = facesToSend[3];
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break;
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default:
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self.predictionTable = predictionTables[3];
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};
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self.generator = geo.ConfigGenerator.createFromString(prefetch, self);
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self.backupGenerator = new geo.ConfigGenerator(self);
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if (self.mesh === undefined) {
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process.stderr.write('Wrong path for model : ' + path);
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socket.emit('refused');
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socket.disconnect();
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return;
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}
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self.meshFaces = new Array(self.mesh.meshes.length);
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for (var i = 0; i < self.meshFaces.length; i++) {
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self.meshFaces[i] = {
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counter: 0,
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array: new Array(self.mesh.meshes[i].faces.length)
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};
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}
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socket.emit('ok');
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});
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socket.on('materials', function() {
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var data = self.nextMaterials();
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socket.emit('elements', data);
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});
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socket.on('reco', function(recoId) {
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self.previousReco = recoId + 1;
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});
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socket.on('next', function(_camera) { // score) {
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var cameraFrustum = {};
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var beginning = self.beginning;
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var cameraExists = false;
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// Clean camera attribute
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if (_camera !== null) {
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cameraFrustum = {
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position: {
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x: _camera[0][0],
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y: _camera[0][1],
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z: _camera[0][2]
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},
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target: {
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x: _camera[1][0],
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y: _camera[1][1],
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z: _camera[1][2]
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},
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planes: []
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};
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var recommendationClicked = _camera[2];
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for (i = 3; i < _camera.length; i++) {
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cameraFrustum.planes.push({
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normal: {
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x: _camera[i][0],
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y: _camera[i][1],
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z: _camera[i][2]
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},
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constant: _camera[i][3]
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});
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}
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cameraExists = true;
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}
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if (cameraExists) {
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// Create config for proportions of chunks
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var didPrefetch = false;
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var config = self.generator.generateMainConfig(cameraFrustum, recommendationClicked);
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// Send next elements
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var oldTime = Date.now();
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var next = self.nextElements(config);
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// console.log(
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// 'Adding ' +
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// next.size +
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// ' for newConfig : '
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// + JSON.stringify(config.map(function(o) { return o.proportion}))
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// );
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if (self.beginning === true && next.size < self.chunk) {
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self.beginning = false;
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config = self.generator.generateMainConfig(cameraFrustum, recommendationClicked);
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}
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var fillElements = self.nextElements(config, self.chunk - next.size);
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next.configSizes = fillElements.configSizes;
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next.data.push.apply(next.data, fillElements.data);
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next.size += fillElements.size;
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// Chunk is not empty, compute fill config
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if (next.size < self.chunk) {
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config = self.generator.generateFillingConfig(config, next, cameraFrustum, recommendationClicked);
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fillElements = self.nextElements(config, self.chunk - next.size);
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next.data.push.apply(next.data, fillElements.data);
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next.size += fillElements.size;
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}
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// If still not empty, fill linear
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if (next.size < self.chunk) {
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fillElements = self.nextElements([], self.chunk - next.size);
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next.data.push.apply(next.data, fillElements.data);
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next.size += fillElements.size;
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}
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} else {
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config = self.backupGenerator.generateMainConfig();
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next = self.nextElements(config, self.chunk);
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}
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console.log('Chunk of size ' + next.size + ' (generated in ' + (Date.now() - oldTime) + 'ms)');
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if (next.data.length === 0) {
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socket.disconnect();
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} else {
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socket.emit('elements', next.data);
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}
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});
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};
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/**
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* Prepare the array of materials
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* @return array the array to send with all materials of the current mesh
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*/
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geo.MeshStreamer.prototype.nextMaterials = function() {
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var data = [];
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data.push(['g', this.mesh.numberOfFaces]);
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for (var i = 0; i < this.mesh.meshes.length; i++) {
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var currentMesh = this.mesh.meshes[i];
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// Send usemtl
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data.push([
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'u',
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currentMesh.material,
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currentMesh.vertices.length,
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currentMesh.faces.length,
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this.mesh.texCoords.length > 0,
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this.mesh.normals.length > 0
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]);
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}
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return data;
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};
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/**
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* Prepare the next elements
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* @param {Object[]} config a configuration list
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* @returns {array} an array of elements ready to send
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* @see {@link https://github.com/DragonRock/3dinterface/wiki/Streaming-configuration|Configuration list documentation}
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*/
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geo.MeshStreamer.prototype.nextElements = function(config, chunk) {
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if (chunk === undefined)
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chunk = this.chunk;
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var i;
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var data = [];
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var configSizes = [];
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var buffers = [];
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var mightBeCompletetlyFinished = true;
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// BOOM
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// if (camera != null)
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// this.mesh.faces.sort(this.faceComparator(camera));
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if (config.length === 0) {
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config.push({
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proportion: 1
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});
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}
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totalSize = 0;
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for (var configIndex = 0; configIndex < config.length; configIndex++) {
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configSizes[configIndex] = 0;
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buffers[configIndex] = [];
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}
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faceloop:
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for (var faceIndex = 0; faceIndex < this.mesh.faces.length; faceIndex++) {
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var currentFace = this.mesh.faces[faceIndex];
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if (this.faces[currentFace.index] === true) {
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continue;
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}
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mightBeCompletetlyFinished = false;
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var vertex1 = this.mesh.vertices[currentFace.a];
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var vertex2 = this.mesh.vertices[currentFace.b];
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var vertex3 = this.mesh.vertices[currentFace.c];
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for (var configIndex = 0; configIndex < config.length; configIndex++) {
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var currentConfig = config[configIndex];
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var display = false;
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var exitToContinue = false;
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var threeVertices = [vertex1, vertex2, vertex3];
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// Frustum culling
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if (!currentConfig.smart && (currentConfig.frustum === undefined || (isInFrustum(threeVertices, currentConfig.frustum.planes) && !this.isBackFace(currentConfig.frustum, currentFace)))) {
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buffers[configIndex].push(currentFace);
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continue faceloop;
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}
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}
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}
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|
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// Fill smart recos
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for (var configIndex = 0; configIndex < config.length; configIndex++) {
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var currentConfig = config[configIndex];
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if (!currentConfig.smart) {
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continue;
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}
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var area = 0;
|
|
var currentArea = 0;
|
|
|
|
// Fill buffer using facesToSend
|
|
for (var faceIndex = 0; faceIndex < this.facesToSend[currentConfig.recommendationId].length; faceIndex++) {
|
|
|
|
var faceInfo = this.facesToSend[currentConfig.recommendationId][faceIndex];
|
|
|
|
area += faceInfo.area;
|
|
|
|
if (area > 0.9) {
|
|
break;
|
|
}
|
|
|
|
if (this.faces[faceInfo.index] !== true) {
|
|
|
|
var face = this.mesh.faces[faceInfo.index];
|
|
|
|
if (face === undefined) {
|
|
console.log(faceInfo.index, this.mesh.faces.length);
|
|
console.log('ERROR !!!');
|
|
} else {
|
|
buffers[configIndex].push(face);
|
|
}
|
|
|
|
} else if (this.beginning === true) {
|
|
|
|
currentArea += faceInfo.area;
|
|
|
|
if (currentArea > this.beginningThreshold) {
|
|
|
|
this.beginning = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
var totalSize = 0;
|
|
var configSize = 0;
|
|
|
|
for (var configIndex = 0; configIndex < config.length; configIndex++) {
|
|
|
|
// Sort buffer
|
|
if (config[configIndex].frustum !== undefined) {
|
|
|
|
buffers[configIndex].sort(this.faceComparator(config[configIndex].frustum));
|
|
|
|
} else {
|
|
|
|
// console.log("Did not sort");
|
|
|
|
}
|
|
|
|
// Fill chunk
|
|
for(var i = 0; i < buffers[configIndex].length; i++) {
|
|
|
|
// console.log(buffers[configIndex][i]);
|
|
var size = this.pushFace(buffers[configIndex][i], data);
|
|
|
|
totalSize += size;
|
|
configSizes[configIndex] += size;
|
|
|
|
if (configSizes[configIndex] > chunk * config[configIndex].proportion) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (totalSize > chunk) {
|
|
|
|
// console.log(configIndex, sent/(chunk * currentConfig.proportion));
|
|
return {data: data, finsihed:false, configSizes: configSizes, size: totalSize};
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return {data: data, finished: mightBeCompletetlyFinished, configSizes: configSizes, size:totalSize};
|
|
|
|
};
|
|
|
|
geo.MeshStreamer.prototype.pushFace = function(face, buffer) {
|
|
|
|
var totalSize = 0;
|
|
|
|
var vertex1 = this.mesh.vertices[face.a];
|
|
var vertex2 = this.mesh.vertices[face.b];
|
|
var vertex3 = this.mesh.vertices[face.c];
|
|
|
|
// Send face
|
|
if (!this.vertices[face.a]) {
|
|
|
|
buffer.push(vertex1.toList());
|
|
this.vertices[face.a] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
if (!this.vertices[face.b]) {
|
|
|
|
buffer.push(vertex2.toList());
|
|
this.vertices[face.b] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
if (!this.vertices[face.c]) {
|
|
|
|
buffer.push(vertex3.toList());
|
|
this.vertices[face.c] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
var normal1 = this.mesh.normals[face.aNormal];
|
|
var normal2 = this.mesh.normals[face.bNormal];
|
|
var normal3 = this.mesh.normals[face.cNormal];
|
|
|
|
if (normal1 !== undefined && !this.normals[face.aNormal]) {
|
|
|
|
buffer.push(normal1.toList());
|
|
this.normals[face.aNormal] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
if (normal2 !== undefined && !this.normals[face.bNormal]) {
|
|
|
|
buffer.push(normal2.toList());
|
|
this.normals[face.bNormal] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
if (normal3 !== undefined && !this.normals[face.cNormal]) {
|
|
|
|
buffer.push(normal3.toList());
|
|
this.normals[face.cNormal] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
var tex1 = this.mesh.texCoords[face.aTexture];
|
|
var tex2 = this.mesh.texCoords[face.bTexture];
|
|
var tex3 = this.mesh.texCoords[face.cTexture];
|
|
|
|
if (tex1 !== undefined && !this.texCoords[face.aTexture]) {
|
|
|
|
buffer.push(tex1.toList());
|
|
this.texCoords[face.aTexture] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
if (tex2 !== undefined && !this.texCoords[face.bTexture]) {
|
|
|
|
buffer.push(tex2.toList());
|
|
this.texCoords[face.bTexture] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
if (tex3 !== undefined && !this.texCoords[face.cTexture]) {
|
|
|
|
buffer.push(tex3.toList());
|
|
this.texCoords[face.cTexture] = true;
|
|
totalSize++;
|
|
|
|
}
|
|
|
|
buffer.push(face.toList());
|
|
this.faces[face.index] = true;
|
|
totalSize+=3;
|
|
|
|
return totalSize;
|
|
};
|
|
|
|
geo.MeshStreamer.prototype.isFinished = function(i) {
|
|
|
|
return this.meshFaces[i].counter === this.meshFaces[i].array.length;
|
|
|
|
};
|