The Tor Browser: js/src/v8/raytrace.js@129ffea94266 (annotated)

js/src/v8/raytrace.js@129ffea94266 (annotated)

js/src/v8/raytrace.js

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 // The ray tracer code in this file is written by Adam Burmister. It
 // is available in its original form from:
 //
 //   http://labs.flog.nz.co/raytracer/
 //
 // It has been modified slightly by Google to work as a standalone
 // benchmark, but the all the computational code remains
 // untouched. This file also contains a copy of parts of the Prototype
 // JavaScript framework which is used by the ray tracer.
 var RayTrace = new BenchmarkSuite('RayTrace', 739989, [
   new Benchmark('RayTrace', renderScene)
 ]);
 // Variable used to hold a number that can be used to verify that
 // the scene was ray traced correctly.
 var checkNumber;
 // ------------------------------------------------------------------------
 // ------------------------------------------------------------------------
 // The following is a copy of parts of the Prototype JavaScript library:
 // Prototype JavaScript framework, version 1.5.0
 // (c) 2005-2007 Sam Stephenson
 //
 // Prototype is freely distributable under the terms of an MIT-style license.
 // For details, see the Prototype web site: http://prototype.conio.net/
 var Class = {
   create: function() {
     return function() {
       this.initialize.apply(this, arguments);
     }
   }
 };
 Object.extend = function(destination, source) {
   for (var property in source) {
     destination[property] = source[property];
   }
   return destination;
 };
 // ------------------------------------------------------------------------
 // ------------------------------------------------------------------------
 // The rest of this file is the actual ray tracer written by Adam
 // Burmister. It's a concatenation of the following files:
 //
 //   flog/color.js
 //   flog/light.js
 //   flog/vector.js
 //   flog/ray.js
 //   flog/scene.js
 //   flog/material/basematerial.js
 //   flog/material/solid.js
 //   flog/material/chessboard.js
 //   flog/shape/baseshape.js
 //   flog/shape/sphere.js
 //   flog/shape/plane.js
 //   flog/intersectioninfo.js
 //   flog/camera.js
 //   flog/background.js
 //   flog/engine.js
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Color = Class.create();
 Flog.RayTracer.Color.prototype = {
     red : 0.0,
     green : 0.0,
     blue : 0.0,
     initialize : function(r, g, b) {
         if(!r) r = 0.0;
         if(!g) g = 0.0;
         if(!b) b = 0.0;
         this.red = r;
         this.green = g;
         this.blue = b;
     },
     add : function(c1, c2){
         var result = new Flog.RayTracer.Color(0,0,0);
         result.red = c1.red + c2.red;
         result.green = c1.green + c2.green;
         result.blue = c1.blue + c2.blue;
         return result;
     },
     addScalar: function(c1, s){
         var result = new Flog.RayTracer.Color(0,0,0);
         result.red = c1.red + s;
         result.green = c1.green + s;
         result.blue = c1.blue + s;
         result.limit();
         return result;
     },
     subtract: function(c1, c2){
         var result = new Flog.RayTracer.Color(0,0,0);
         result.red = c1.red - c2.red;
         result.green = c1.green - c2.green;
         result.blue = c1.blue - c2.blue;
         return result;
     },
     multiply : function(c1, c2) {
         var result = new Flog.RayTracer.Color(0,0,0);
         result.red = c1.red * c2.red;
         result.green = c1.green * c2.green;
         result.blue = c1.blue * c2.blue;
         return result;
     },
     multiplyScalar : function(c1, f) {
         var result = new Flog.RayTracer.Color(0,0,0);
         result.red = c1.red * f;
         result.green = c1.green * f;
         result.blue = c1.blue * f;
         return result;
     },
     divideFactor : function(c1, f) {
         var result = new Flog.RayTracer.Color(0,0,0);
         result.red = c1.red / f;
         result.green = c1.green / f;
         result.blue = c1.blue / f;
         return result;
     },
     limit: function(){
         this.red = (this.red > 0.0) ? ( (this.red > 1.0) ? 1.0 : this.red ) : 0.0;
         this.green = (this.green > 0.0) ? ( (this.green > 1.0) ? 1.0 : this.green ) : 0.0;
         this.blue = (this.blue > 0.0) ? ( (this.blue > 1.0) ? 1.0 : this.blue ) : 0.0;
     },
     distance : function(color) {
         var d = Math.abs(this.red - color.red) + Math.abs(this.green - color.green) + Math.abs(this.blue - color.blue);
         return d;
     },
     blend: function(c1, c2, w){
         var result = new Flog.RayTracer.Color(0,0,0);
         result = Flog.RayTracer.Color.prototype.add(
                     Flog.RayTracer.Color.prototype.multiplyScalar(c1, 1 - w),
                     Flog.RayTracer.Color.prototype.multiplyScalar(c2, w)
                   );
         return result;
     },
     brightness : function() {
         var r = Math.floor(this.red*255);
         var g = Math.floor(this.green*255);
         var b = Math.floor(this.blue*255);
         return (r * 77 + g * 150 + b * 29) >> 8;
     },
     toString : function () {
         var r = Math.floor(this.red*255);
         var g = Math.floor(this.green*255);
         var b = Math.floor(this.blue*255);
         return "rgb("+ r +","+ g +","+ b +")";
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Light = Class.create();
 Flog.RayTracer.Light.prototype = {
     position: null,
     color: null,
     intensity: 10.0,
     initialize : function(pos, color, intensity) {
         this.position = pos;
         this.color = color;
         this.intensity = (intensity ? intensity : 10.0);
     },
     toString : function () {
         return 'Light [' + this.position.x + ',' + this.position.y + ',' + this.position.z + ']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Vector = Class.create();
 Flog.RayTracer.Vector.prototype = {
     x : 0.0,
     y : 0.0,
     z : 0.0,
     initialize : function(x, y, z) {
         this.x = (x ? x : 0);
         this.y = (y ? y : 0);
         this.z = (z ? z : 0);
     },
     copy: function(vector){
         this.x = vector.x;
         this.y = vector.y;
         this.z = vector.z;
     },
     normalize : function() {
         var m = this.magnitude();
         return new Flog.RayTracer.Vector(this.x / m, this.y / m, this.z / m);
     },
     magnitude : function() {
         return Math.sqrt((this.x * this.x) + (this.y * this.y) + (this.z * this.z));
     },
     cross : function(w) {
         return new Flog.RayTracer.Vector(
                                             -this.z * w.y + this.y * w.z,
                                            this.z * w.x - this.x * w.z,
                                           -this.y * w.x + this.x * w.y);
     },
     dot : function(w) {
         return this.x * w.x + this.y * w.y + this.z * w.z;
     },
     add : function(v, w) {
         return new Flog.RayTracer.Vector(w.x + v.x, w.y + v.y, w.z + v.z);
     },
     subtract : function(v, w) {
         if(!w || !v) throw 'Vectors must be defined [' + v + ',' + w + ']';
         return new Flog.RayTracer.Vector(v.x - w.x, v.y - w.y, v.z - w.z);
     },
     multiplyVector : function(v, w) {
         return new Flog.RayTracer.Vector(v.x * w.x, v.y * w.y, v.z * w.z);
     },
     multiplyScalar : function(v, w) {
         return new Flog.RayTracer.Vector(v.x * w, v.y * w, v.z * w);
     },
     toString : function () {
         return 'Vector [' + this.x + ',' + this.y + ',' + this.z + ']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Ray = Class.create();
 Flog.RayTracer.Ray.prototype = {
     position : null,
     direction : null,
     initialize : function(pos, dir) {
         this.position = pos;
         this.direction = dir;
     },
     toString : function () {
         return 'Ray [' + this.position + ',' + this.direction + ']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Scene = Class.create();
 Flog.RayTracer.Scene.prototype = {
     camera : null,
     shapes : [],
     lights : [],
     background : null,
     initialize : function() {
         this.camera = new Flog.RayTracer.Camera(
             new Flog.RayTracer.Vector(0,0,-5),
             new Flog.RayTracer.Vector(0,0,1),
             new Flog.RayTracer.Vector(0,1,0)
         );
         this.shapes = new Array();
         this.lights = new Array();
         this.background = new Flog.RayTracer.Background(new Flog.RayTracer.Color(0,0,0.5), 0.2);
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 if(typeof(Flog.RayTracer.Material) == 'undefined') Flog.RayTracer.Material = {};
 Flog.RayTracer.Material.BaseMaterial = Class.create();
 Flog.RayTracer.Material.BaseMaterial.prototype = {
     gloss: 2.0,             // [0...infinity] 0 = matt
     transparency: 0.0,      // 0=opaque
     reflection: 0.0,        // [0...infinity] 0 = no reflection
     refraction: 0.50,
     hasTexture: false,
     initialize : function() {
     },
     getColor: function(u, v){
     },
     wrapUp: function(t){
         t = t % 2.0;
         if(t < -1) t += 2.0;
         if(t >= 1) t -= 2.0;
         return t;
     },
     toString : function () {
         return 'Material [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Material.Solid = Class.create();
 Flog.RayTracer.Material.Solid.prototype = Object.extend(
     new Flog.RayTracer.Material.BaseMaterial(), {
         initialize : function(color, reflection, refraction, transparency, gloss) {
             this.color = color;
             this.reflection = reflection;
             this.transparency = transparency;
             this.gloss = gloss;
             this.hasTexture = false;
         },
         getColor: function(u, v){
             return this.color;
         },
         toString : function () {
             return 'SolidMaterial [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
         }
     }
 );
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Material.Chessboard = Class.create();
 Flog.RayTracer.Material.Chessboard.prototype = Object.extend(
     new Flog.RayTracer.Material.BaseMaterial(), {
         colorEven: null,
         colorOdd: null,
         density: 0.5,
         initialize : function(colorEven, colorOdd, reflection, transparency, gloss, density) {
             this.colorEven = colorEven;
             this.colorOdd = colorOdd;
             this.reflection = reflection;
             this.transparency = transparency;
             this.gloss = gloss;
             this.density = density;
             this.hasTexture = true;
         },
         getColor: function(u, v){
             var t = this.wrapUp(u * this.density) * this.wrapUp(v * this.density);
             if(t < 0.0)
                 return this.colorEven;
             else
                 return this.colorOdd;
         },
         toString : function () {
             return 'ChessMaterial [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
         }
     }
 );
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
 Flog.RayTracer.Shape.Sphere = Class.create();
 Flog.RayTracer.Shape.Sphere.prototype = {
     initialize : function(pos, radius, material) {
         this.radius = radius;
         this.position = pos;
         this.material = material;
     },
     intersect: function(ray){
         var info = new Flog.RayTracer.IntersectionInfo();
         info.shape = this;
         var dst = Flog.RayTracer.Vector.prototype.subtract(ray.position, this.position);
         var B = dst.dot(ray.direction);
         var C = dst.dot(dst) - (this.radius * this.radius);
         var D = (B * B) - C;
         if(D > 0){ // intersection!
             info.isHit = true;
             info.distance = (-B) - Math.sqrt(D);
             info.position = Flog.RayTracer.Vector.prototype.add(
                                                 ray.position,
                                                 Flog.RayTracer.Vector.prototype.multiplyScalar(
                                                     ray.direction,
                                                     info.distance
                                                 )
                                             );
             info.normal = Flog.RayTracer.Vector.prototype.subtract(
                                             info.position,
                                             this.position
                                         ).normalize();
             info.color = this.material.getColor(0,0);
         } else {
             info.isHit = false;
         }
         return info;
     },
     toString : function () {
         return 'Sphere [position=' + this.position + ', radius=' + this.radius + ']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
 Flog.RayTracer.Shape.Plane = Class.create();
 Flog.RayTracer.Shape.Plane.prototype = {
     d: 0.0,
     initialize : function(pos, d, material) {
         this.position = pos;
         this.d = d;
         this.material = material;
     },
     intersect: function(ray){
         var info = new Flog.RayTracer.IntersectionInfo();
         var Vd = this.position.dot(ray.direction);
         if(Vd == 0) return info; // no intersection
         var t = -(this.position.dot(ray.position) + this.d) / Vd;
         if(t <= 0) return info;
         info.shape = this;
         info.isHit = true;
         info.position = Flog.RayTracer.Vector.prototype.add(
                                             ray.position,
                                             Flog.RayTracer.Vector.prototype.multiplyScalar(
                                                 ray.direction,
                                                 t
                                             )
                                         );
         info.normal = this.position;
         info.distance = t;
         if(this.material.hasTexture){
             var vU = new Flog.RayTracer.Vector(this.position.y, this.position.z, -this.position.x);
             var vV = vU.cross(this.position);
             var u = info.position.dot(vU);
             var v = info.position.dot(vV);
             info.color = this.material.getColor(u,v);
         } else {
             info.color = this.material.getColor(0,0);
         }
         return info;
     },
     toString : function () {
         return 'Plane [' + this.position + ', d=' + this.d + ']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.IntersectionInfo = Class.create();
 Flog.RayTracer.IntersectionInfo.prototype = {
     isHit: false,
     hitCount: 0,
     shape: null,
     position: null,
     normal: null,
     color: null,
     distance: null,
     initialize : function() {
         this.color = new Flog.RayTracer.Color(0,0,0);
     },
     toString : function () {
         return 'Intersection [' + this.position + ']';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Camera = Class.create();
 Flog.RayTracer.Camera.prototype = {
     position: null,
     lookAt: null,
     equator: null,
     up: null,
     screen: null,
     initialize : function(pos, lookAt, up) {
         this.position = pos;
         this.lookAt = lookAt;
         this.up = up;
         this.equator = lookAt.normalize().cross(this.up);
         this.screen = Flog.RayTracer.Vector.prototype.add(this.position, this.lookAt);
     },
     getRay: function(vx, vy){
         var pos = Flog.RayTracer.Vector.prototype.subtract(
             this.screen,
             Flog.RayTracer.Vector.prototype.subtract(
                 Flog.RayTracer.Vector.prototype.multiplyScalar(this.equator, vx),
                 Flog.RayTracer.Vector.prototype.multiplyScalar(this.up, vy)
             )
         );
         pos.y = pos.y * -1;
         var dir = Flog.RayTracer.Vector.prototype.subtract(
             pos,
             this.position
         );
         var ray = new Flog.RayTracer.Ray(pos, dir.normalize());
         return ray;
     },
     toString : function () {
         return 'Ray []';
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Background = Class.create();
 Flog.RayTracer.Background.prototype = {
     color : null,
     ambience : 0.0,
     initialize : function(color, ambience) {
         this.color = color;
         this.ambience = ambience;
     }
 }
 /* Fake a Flog.* namespace */
 if(typeof(Flog) == 'undefined') var Flog = {};
 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 Flog.RayTracer.Engine = Class.create();
 Flog.RayTracer.Engine.prototype = {
     canvas: null, /* 2d context we can render to */
     initialize: function(options){
         this.options = Object.extend({
                 canvasHeight: 100,
                 canvasWidth: 100,
                 pixelWidth: 2,
                 pixelHeight: 2,
                 renderDiffuse: false,
                 renderShadows: false,
                 renderHighlights: false,
                 renderReflections: false,
                 rayDepth: 2
             }, options || {});
         this.options.canvasHeight /= this.options.pixelHeight;
         this.options.canvasWidth /= this.options.pixelWidth;
         /* TODO: dynamically include other scripts */
     },
     setPixel: function(x, y, color){
         var pxW, pxH;
         pxW = this.options.pixelWidth;
         pxH = this.options.pixelHeight;
         if (this.canvas) {
           this.canvas.fillStyle = color.toString();
           this.canvas.fillRect (x * pxW, y * pxH, pxW, pxH);
         } else {
           if (x ===  y) {
             checkNumber += color.brightness();
           }
           // print(x * pxW, y * pxH, pxW, pxH);
         }
     },
     renderScene: function(scene, canvas){
         checkNumber = 0;
         /* Get canvas */
         if (canvas) {
           this.canvas = canvas.getContext("2d");
         } else {
           this.canvas = null;
         }
         var canvasHeight = this.options.canvasHeight;
         var canvasWidth = this.options.canvasWidth;
         for(var y=0; y < canvasHeight; y++){
             for(var x=0; x < canvasWidth; x++){
                 var yp = y * 1.0 / canvasHeight * 2 - 1;
           		var xp = x * 1.0 / canvasWidth * 2 - 1;
           		var ray = scene.camera.getRay(xp, yp);
           		var color = this.getPixelColor(ray, scene);
             	this.setPixel(x, y, color);
             }
         }
         if (checkNumber !== 2321) {
           throw new Error("Scene rendered incorrectly");
         }
     },
     getPixelColor: function(ray, scene){
         var info = this.testIntersection(ray, scene, null);
         if(info.isHit){
             var color = this.rayTrace(info, ray, scene, 0);
             return color;
         }
         return scene.background.color;
     },
     testIntersection: function(ray, scene, exclude){
         var hits = 0;
         var best = new Flog.RayTracer.IntersectionInfo();
         best.distance = 2000;
         for(var i=0; i<scene.shapes.length; i++){
             var shape = scene.shapes[i];
             if(shape != exclude){
                 var info = shape.intersect(ray);
                 if(info.isHit && info.distance >= 0 && info.distance < best.distance){
                     best = info;
                     hits++;
                 }
             }
         }
         best.hitCount = hits;
         return best;
     },
     getReflectionRay: function(P,N,V){
         var c1 = -N.dot(V);
         var R1 = Flog.RayTracer.Vector.prototype.add(
             Flog.RayTracer.Vector.prototype.multiplyScalar(N, 2*c1),
             V
         );
         return new Flog.RayTracer.Ray(P, R1);
     },
     rayTrace: function(info, ray, scene, depth){
         // Calc ambient
         var color = Flog.RayTracer.Color.prototype.multiplyScalar(info.color, scene.background.ambience);
         var oldColor = color;
         var shininess = Math.pow(10, info.shape.material.gloss + 1);
         for(var i=0; i<scene.lights.length; i++){
             var light = scene.lights[i];
             // Calc diffuse lighting
             var v = Flog.RayTracer.Vector.prototype.subtract(
                                 light.position,
                                 info.position
                             ).normalize();
             if(this.options.renderDiffuse){
                 var L = v.dot(info.normal);
                 if(L > 0.0){
                     color = Flog.RayTracer.Color.prototype.add(
                                         color,
                                         Flog.RayTracer.Color.prototype.multiply(
                                             info.color,
                                             Flog.RayTracer.Color.prototype.multiplyScalar(
                                                 light.color,
                                                 L
                                             )
                                         )
                                     );
                 }
             }
             // The greater the depth the more accurate the colours, but
             // this is exponentially (!) expensive
             if(depth <= this.options.rayDepth){
           // calculate reflection ray
           if(this.options.renderReflections && info.shape.material.reflection > 0)
           {
               var reflectionRay = this.getReflectionRay(info.position, info.normal, ray.direction);
               var refl = this.testIntersection(reflectionRay, scene, info.shape);
               if (refl.isHit && refl.distance > 0){
                   refl.color = this.rayTrace(refl, reflectionRay, scene, depth + 1);
               } else {
                   refl.color = scene.background.color;
                         }
                   color = Flog.RayTracer.Color.prototype.blend(
                     color,
                     refl.color,
                     info.shape.material.reflection
                   );
           }
                 // Refraction
                 /* TODO */
             }
             /* Render shadows and highlights */
             var shadowInfo = new Flog.RayTracer.IntersectionInfo();
             if(this.options.renderShadows){
                 var shadowRay = new Flog.RayTracer.Ray(info.position, v);
                 shadowInfo = this.testIntersection(shadowRay, scene, info.shape);
                 if(shadowInfo.isHit && shadowInfo.shape != info.shape /*&& shadowInfo.shape.type != 'PLANE'*/){
                     var vA = Flog.RayTracer.Color.prototype.multiplyScalar(color, 0.5);
                     var dB = (0.5 * Math.pow(shadowInfo.shape.material.transparency, 0.5));
                     color = Flog.RayTracer.Color.prototype.addScalar(vA,dB);
                 }
             }
       // Phong specular highlights
       if(this.options.renderHighlights && !shadowInfo.isHit && info.shape.material.gloss > 0){
         var Lv = Flog.RayTracer.Vector.prototype.subtract(
                             info.shape.position,
                             light.position
                         ).normalize();
         var E = Flog.RayTracer.Vector.prototype.subtract(
                             scene.camera.position,
                             info.shape.position
                         ).normalize();
         var H = Flog.RayTracer.Vector.prototype.subtract(
                             E,
                             Lv
                         ).normalize();
         var glossWeight = Math.pow(Math.max(info.normal.dot(H), 0), shininess);
         color = Flog.RayTracer.Color.prototype.add(
                             Flog.RayTracer.Color.prototype.multiplyScalar(light.color, glossWeight),
                             color
                         );
       }
         }
         color.limit();
         return color;
     }
 };
 function renderScene(){
     var scene = new Flog.RayTracer.Scene();
     scene.camera = new Flog.RayTracer.Camera(
                         new Flog.RayTracer.Vector(0, 0, -15),
                         new Flog.RayTracer.Vector(-0.2, 0, 5),
                         new Flog.RayTracer.Vector(0, 1, 0)
                     );
     scene.background = new Flog.RayTracer.Background(
                                 new Flog.RayTracer.Color(0.5, 0.5, 0.5),
 .4
                             );
     var sphere = new Flog.RayTracer.Shape.Sphere(
         new Flog.RayTracer.Vector(-1.5, 1.5, 2),
 .5,
         new Flog.RayTracer.Material.Solid(
             new Flog.RayTracer.Color(0,0.5,0.5),
 .3,
 .0,
 .0,
 .0
         )
     );
     var sphere1 = new Flog.RayTracer.Shape.Sphere(
         new Flog.RayTracer.Vector(1, 0.25, 1),
 .5,
         new Flog.RayTracer.Material.Solid(
             new Flog.RayTracer.Color(0.9,0.9,0.9),
 .1,
 .0,
 .0,
 .5
         )
     );
     var plane = new Flog.RayTracer.Shape.Plane(
                                 new Flog.RayTracer.Vector(0.1, 0.9, -0.5).normalize(),
 .2,
                                 new Flog.RayTracer.Material.Chessboard(
                                     new Flog.RayTracer.Color(1,1,1),
                                     new Flog.RayTracer.Color(0,0,0),
 .2,
 .0,
 .0,
 .7
                                 )
                             );
     scene.shapes.push(plane);
     scene.shapes.push(sphere);
     scene.shapes.push(sphere1);
     var light = new Flog.RayTracer.Light(
         new Flog.RayTracer.Vector(5, 10, -1),
         new Flog.RayTracer.Color(0.8, 0.8, 0.8)
     );
     var light1 = new Flog.RayTracer.Light(
         new Flog.RayTracer.Vector(-3, 5, -15),
         new Flog.RayTracer.Color(0.8, 0.8, 0.8),
 
     );
     scene.lights.push(light);
     scene.lights.push(light1);
     var imageWidth = 100; // $F('imageWidth');
     var imageHeight = 100; // $F('imageHeight');
     var pixelSize = "5,5".split(','); //  $F('pixelSize').split(',');
     var renderDiffuse = true; // $F('renderDiffuse');
     var renderShadows = true; // $F('renderShadows');
     var renderHighlights = true; // $F('renderHighlights');
     var renderReflections = true; // $F('renderReflections');
     var rayDepth = 2;//$F('rayDepth');
     var raytracer = new Flog.RayTracer.Engine(
         {
             canvasWidth: imageWidth,
             canvasHeight: imageHeight,
             pixelWidth: pixelSize[0],
             pixelHeight: pixelSize[1],
             "renderDiffuse": renderDiffuse,
             "renderHighlights": renderHighlights,
             "renderShadows": renderShadows,
             "renderReflections": renderReflections,
             "rayDepth": rayDepth
         }
     );
     raytracer.renderScene(scene, null, 0);
 }