chrome/test/data/v8_benchmark_v6/raytrace.js

   1 // The ray tracer code in this file is written by Adam Burmister. It
   2 // is available in its original form from:
   3 //
   4 //   http://labs.flog.nz.co/raytracer/
   5 //
   6 // It has been modified slightly by Google to work as a standalone
   7 // benchmark, but the all the computational code remains
   8 // untouched. This file also contains a copy of parts of the Prototype
   9 // JavaScript framework which is used by the ray tracer.
  10
  11 var RayTrace = new BenchmarkSuite('RayTrace', 739989, [
  12   new Benchmark('RayTrace', renderScene)
  13 ]);
  14
  15
  16 // Variable used to hold a number that can be used to verify that
  17 // the scene was ray traced correctly.
  18 var checkNumber;
  19
  20
  21 // ------------------------------------------------------------------------
  22 // ------------------------------------------------------------------------
  23
  24 // The following is a copy of parts of the Prototype JavaScript library:
  25
  26 // Prototype JavaScript framework, version 1.5.0
  27 // (c) 2005-2007 Sam Stephenson
  28 //
  29 // Prototype is freely distributable under the terms of an MIT-style license.
  30 // For details, see the Prototype web site: http://prototype.conio.net/
  31
  32
  33 var Class = {
  34   create: function() {
  35     return function() {
  36       this.initialize.apply(this, arguments);
  37     }
  38   }
  39 };
  40
  41
  42 Object.extend = function(destination, source) {
  43   for (var property in source) {
  44     destination[property] = source[property];
  45   }
  46   return destination;
  47 };
  48
  49
  50 // ------------------------------------------------------------------------
  51 // ------------------------------------------------------------------------
  52
  53 // The rest of this file is the actual ray tracer written by Adam
  54 // Burmister. It's a concatenation of the following files:
  55 //
  56 //   flog/color.js
  57 //   flog/light.js
  58 //   flog/vector.js
  59 //   flog/ray.js
  60 //   flog/scene.js
  61 //   flog/material/basematerial.js
  62 //   flog/material/solid.js
  63 //   flog/material/chessboard.js
  64 //   flog/shape/baseshape.js
  65 //   flog/shape/sphere.js
  66 //   flog/shape/plane.js
  67 //   flog/intersectioninfo.js
  68 //   flog/camera.js
  69 //   flog/background.js
  70 //   flog/engine.js
  71
  72
  73 /* Fake a Flog.* namespace */
  74 if(typeof(Flog) == 'undefined') var Flog = {};
  75 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
  76
  77 Flog.RayTracer.Color = Class.create();
  78
  79 Flog.RayTracer.Color.prototype = {
  80     red : 0.0,
  81     green : 0.0,
  82     blue : 0.0,
  83
  84     initialize : function(r, g, b) {
  85         if(!r) r = 0.0;
  86         if(!g) g = 0.0;
  87         if(!b) b = 0.0;
  88
  89         this.red = r;
  90         this.green = g;
  91         this.blue = b;
  92     },
  93
  94     add : function(c1, c2){
  95         var result = new Flog.RayTracer.Color(0,0,0);
  96
  97         result.red = c1.red + c2.red;
  98         result.green = c1.green + c2.green;
  99         result.blue = c1.blue + c2.blue;
 100
 101         return result;
 102     },
 103
 104     addScalar: function(c1, s){
 105         var result = new Flog.RayTracer.Color(0,0,0);
 106
 107         result.red = c1.red + s;
 108         result.green = c1.green + s;
 109         result.blue = c1.blue + s;
 110
 111         result.limit();
 112
 113         return result;
 114     },
 115
 116     subtract: function(c1, c2){
 117         var result = new Flog.RayTracer.Color(0,0,0);
 118
 119         result.red = c1.red - c2.red;
 120         result.green = c1.green - c2.green;
 121         result.blue = c1.blue - c2.blue;
 122
 123         return result;
 124     },
 125
 126     multiply : function(c1, c2) {
 127         var result = new Flog.RayTracer.Color(0,0,0);
 128
 129         result.red = c1.red * c2.red;
 130         result.green = c1.green * c2.green;
 131         result.blue = c1.blue * c2.blue;
 132
 133         return result;
 134     },
 135
 136     multiplyScalar : function(c1, f) {
 137         var result = new Flog.RayTracer.Color(0,0,0);
 138
 139         result.red = c1.red * f;
 140         result.green = c1.green * f;
 141         result.blue = c1.blue * f;
 142
 143         return result;
 144     },
 145
 146     divideFactor : function(c1, f) {
 147         var result = new Flog.RayTracer.Color(0,0,0);
 148
 149         result.red = c1.red / f;
 150         result.green = c1.green / f;
 151         result.blue = c1.blue / f;
 152
 153         return result;
 154     },
 155
 156     limit: function(){
 157         this.red = (this.red > 0.0) ? ( (this.red > 1.0) ? 1.0 : this.red ) : 0.0;
 158         this.green = (this.green > 0.0) ? ( (this.green > 1.0) ? 1.0 : this.green ) : 0.0;
 159         this.blue = (this.blue > 0.0) ? ( (this.blue > 1.0) ? 1.0 : this.blue ) : 0.0;
 160     },
 161
 162     distance : function(color) {
 163         var d = Math.abs(this.red - color.red) + Math.abs(this.green - color.green) + Math.abs(this.blue - color.blue);
 164         return d;
 165     },
 166
 167     blend: function(c1, c2, w){
 168         var result = new Flog.RayTracer.Color(0,0,0);
 169         result = Flog.RayTracer.Color.prototype.add(
 170                     Flog.RayTracer.Color.prototype.multiplyScalar(c1, 1 - w),
 171                     Flog.RayTracer.Color.prototype.multiplyScalar(c2, w)
 172                   );
 173         return result;
 174     },
 175
 176     brightness : function() {
 177         var r = Math.floor(this.red*255);
 178         var g = Math.floor(this.green*255);
 179         var b = Math.floor(this.blue*255);
 180         return (r * 77 + g * 150 + b * 29) >> 8;
 181     },
 182
 183     toString : function () {
 184         var r = Math.floor(this.red*255);
 185         var g = Math.floor(this.green*255);
 186         var b = Math.floor(this.blue*255);
 187
 188         return "rgb("+ r +","+ g +","+ b +")";
 189     }
 190 }
 191 /* Fake a Flog.* namespace */
 192 if(typeof(Flog) == 'undefined') var Flog = {};
 193 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 194
 195 Flog.RayTracer.Light = Class.create();
 196
 197 Flog.RayTracer.Light.prototype = {
 198     position: null,
 199     color: null,
 200     intensity: 10.0,
 201
 202     initialize : function(pos, color, intensity) {
 203         this.position = pos;
 204         this.color = color;
 205         this.intensity = (intensity ? intensity : 10.0);
 206     },
 207
 208     toString : function () {
 209         return 'Light [' + this.position.x + ',' + this.position.y + ',' + this.position.z + ']';
 210     }
 211 }
 212 /* Fake a Flog.* namespace */
 213 if(typeof(Flog) == 'undefined') var Flog = {};
 214 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 215
 216 Flog.RayTracer.Vector = Class.create();
 217
 218 Flog.RayTracer.Vector.prototype = {
 219     x : 0.0,
 220     y : 0.0,
 221     z : 0.0,
 222
 223     initialize : function(x, y, z) {
 224         this.x = (x ? x : 0);
 225         this.y = (y ? y : 0);
 226         this.z = (z ? z : 0);
 227     },
 228
 229     copy: function(vector){
 230         this.x = vector.x;
 231         this.y = vector.y;
 232         this.z = vector.z;
 233     },
 234
 235     normalize : function() {
 236         var m = this.magnitude();
 237         return new Flog.RayTracer.Vector(this.x / m, this.y / m, this.z / m);
 238     },
 239
 240     magnitude : function() {
 241         return Math.sqrt((this.x * this.x) + (this.y * this.y) + (this.z * this.z));
 242     },
 243
 244     cross : function(w) {
 245         return new Flog.RayTracer.Vector(
 246                                             -this.z * w.y + this.y * w.z,
 247                                            this.z * w.x - this.x * w.z,
 248                                           -this.y * w.x + this.x * w.y);
 249     },
 250
 251     dot : function(w) {
 252         return this.x * w.x + this.y * w.y + this.z * w.z;
 253     },
 254
 255     add : function(v, w) {
 256         return new Flog.RayTracer.Vector(w.x + v.x, w.y + v.y, w.z + v.z);
 257     },
 258
 259     subtract : function(v, w) {
 260         if(!w || !v) throw 'Vectors must be defined [' + v + ',' + w + ']';
 261         return new Flog.RayTracer.Vector(v.x - w.x, v.y - w.y, v.z - w.z);
 262     },
 263
 264     multiplyVector : function(v, w) {
 265         return new Flog.RayTracer.Vector(v.x * w.x, v.y * w.y, v.z * w.z);
 266     },
 267
 268     multiplyScalar : function(v, w) {
 269         return new Flog.RayTracer.Vector(v.x * w, v.y * w, v.z * w);
 270     },
 271
 272     toString : function () {
 273         return 'Vector [' + this.x + ',' + this.y + ',' + this.z + ']';
 274     }
 275 }
 276 /* Fake a Flog.* namespace */
 277 if(typeof(Flog) == 'undefined') var Flog = {};
 278 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 279
 280 Flog.RayTracer.Ray = Class.create();
 281
 282 Flog.RayTracer.Ray.prototype = {
 283     position : null,
 284     direction : null,
 285     initialize : function(pos, dir) {
 286         this.position = pos;
 287         this.direction = dir;
 288     },
 289
 290     toString : function () {
 291         return 'Ray [' + this.position + ',' + this.direction + ']';
 292     }
 293 }
 294 /* Fake a Flog.* namespace */
 295 if(typeof(Flog) == 'undefined') var Flog = {};
 296 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 297
 298 Flog.RayTracer.Scene = Class.create();
 299
 300 Flog.RayTracer.Scene.prototype = {
 301     camera : null,
 302     shapes : [],
 303     lights : [],
 304     background : null,
 305
 306     initialize : function() {
 307         this.camera = new Flog.RayTracer.Camera(
 308             new Flog.RayTracer.Vector(0,0,-5),
 309             new Flog.RayTracer.Vector(0,0,1),
 310             new Flog.RayTracer.Vector(0,1,0)
 311         );
 312         this.shapes = new Array();
 313         this.lights = new Array();
 314         this.background = new Flog.RayTracer.Background(new Flog.RayTracer.Color(0,0,0.5), 0.2);
 315     }
 316 }
 317 /* Fake a Flog.* namespace */
 318 if(typeof(Flog) == 'undefined') var Flog = {};
 319 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 320 if(typeof(Flog.RayTracer.Material) == 'undefined') Flog.RayTracer.Material = {};
 321
 322 Flog.RayTracer.Material.BaseMaterial = Class.create();
 323
 324 Flog.RayTracer.Material.BaseMaterial.prototype = {
 325
 326     gloss: 2.0,             // [0...infinity] 0 = matt
 327     transparency: 0.0,      // 0=opaque
 328     reflection: 0.0,        // [0...infinity] 0 = no reflection
 329     refraction: 0.50,
 330     hasTexture: false,
 331
 332     initialize : function() {
 333
 334     },
 335
 336     getColor: function(u, v){
 337
 338     },
 339
 340     wrapUp: function(t){
 341         t = t % 2.0;
 342         if(t < -1) t += 2.0;
 343         if(t >= 1) t -= 2.0;
 344         return t;
 345     },
 346
 347     toString : function () {
 348         return 'Material [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
 349     }
 350 }
 351 /* Fake a Flog.* namespace */
 352 if(typeof(Flog) == 'undefined') var Flog = {};
 353 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 354
 355 Flog.RayTracer.Material.Solid = Class.create();
 356
 357 Flog.RayTracer.Material.Solid.prototype = Object.extend(
 358     new Flog.RayTracer.Material.BaseMaterial(), {
 359         initialize : function(color, reflection, refraction, transparency, gloss) {
 360             this.color = color;
 361             this.reflection = reflection;
 362             this.transparency = transparency;
 363             this.gloss = gloss;
 364             this.hasTexture = false;
 365         },
 366
 367         getColor: function(u, v){
 368             return this.color;
 369         },
 370
 371         toString : function () {
 372             return 'SolidMaterial [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
 373         }
 374     }
 375 );
 376 /* Fake a Flog.* namespace */
 377 if(typeof(Flog) == 'undefined') var Flog = {};
 378 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 379
 380 Flog.RayTracer.Material.Chessboard = Class.create();
 381
 382 Flog.RayTracer.Material.Chessboard.prototype = Object.extend(
 383     new Flog.RayTracer.Material.BaseMaterial(), {
 384         colorEven: null,
 385         colorOdd: null,
 386         density: 0.5,
 387
 388         initialize : function(colorEven, colorOdd, reflection, transparency, gloss, density) {
 389             this.colorEven = colorEven;
 390             this.colorOdd = colorOdd;
 391             this.reflection = reflection;
 392             this.transparency = transparency;
 393             this.gloss = gloss;
 394             this.density = density;
 395             this.hasTexture = true;
 396         },
 397
 398         getColor: function(u, v){
 399             var t = this.wrapUp(u * this.density) * this.wrapUp(v * this.density);
 400
 401             if(t < 0.0)
 402                 return this.colorEven;
 403             else
 404                 return this.colorOdd;
 405         },
 406
 407         toString : function () {
 408             return 'ChessMaterial [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
 409         }
 410     }
 411 );
 412 /* Fake a Flog.* namespace */
 413 if(typeof(Flog) == 'undefined') var Flog = {};
 414 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 415 if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
 416
 417 Flog.RayTracer.Shape.Sphere = Class.create();
 418
 419 Flog.RayTracer.Shape.Sphere.prototype = {
 420     initialize : function(pos, radius, material) {
 421         this.radius = radius;
 422         this.position = pos;
 423         this.material = material;
 424     },
 425
 426     intersect: function(ray){
 427         var info = new Flog.RayTracer.IntersectionInfo();
 428         info.shape = this;
 429
 430         var dst = Flog.RayTracer.Vector.prototype.subtract(ray.position, this.position);
 431
 432         var B = dst.dot(ray.direction);
 433         var C = dst.dot(dst) - (this.radius * this.radius);
 434         var D = (B * B) - C;
 435
 436         if(D > 0){ // intersection!
 437             info.isHit = true;
 438             info.distance = (-B) - Math.sqrt(D);
 439             info.position = Flog.RayTracer.Vector.prototype.add(
 440                                                 ray.position,
 441                                                 Flog.RayTracer.Vector.prototype.multiplyScalar(
 442                                                     ray.direction,
 443                                                     info.distance
 444                                                 )
 445                                             );
 446             info.normal = Flog.RayTracer.Vector.prototype.subtract(
 447                                             info.position,
 448                                             this.position
 449                                         ).normalize();
 450
 451             info.color = this.material.getColor(0,0);
 452         } else {
 453             info.isHit = false;
 454         }
 455         return info;
 456     },
 457
 458     toString : function () {
 459         return 'Sphere [position=' + this.position + ', radius=' + this.radius + ']';
 460     }
 461 }
 462 /* Fake a Flog.* namespace */
 463 if(typeof(Flog) == 'undefined') var Flog = {};
 464 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 465 if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
 466
 467 Flog.RayTracer.Shape.Plane = Class.create();
 468
 469 Flog.RayTracer.Shape.Plane.prototype = {
 470     d: 0.0,
 471
 472     initialize : function(pos, d, material) {
 473         this.position = pos;
 474         this.d = d;
 475         this.material = material;
 476     },
 477
 478     intersect: function(ray){
 479         var info = new Flog.RayTracer.IntersectionInfo();
 480
 481         var Vd = this.position.dot(ray.direction);
 482         if(Vd == 0) return info; // no intersection
 483
 484         var t = -(this.position.dot(ray.position) + this.d) / Vd;
 485         if(t <= 0) return info;
 486
 487         info.shape = this;
 488         info.isHit = true;
 489         info.position = Flog.RayTracer.Vector.prototype.add(
 490                                             ray.position,
 491                                             Flog.RayTracer.Vector.prototype.multiplyScalar(
 492                                                 ray.direction,
 493                                                 t
 494                                             )
 495                                         );
 496         info.normal = this.position;
 497         info.distance = t;
 498
 499         if(this.material.hasTexture){
 500             var vU = new Flog.RayTracer.Vector(this.position.y, this.position.z, -this.position.x);
 501             var vV = vU.cross(this.position);
 502             var u = info.position.dot(vU);
 503             var v = info.position.dot(vV);
 504             info.color = this.material.getColor(u,v);
 505         } else {
 506             info.color = this.material.getColor(0,0);
 507         }
 508
 509         return info;
 510     },
 511
 512     toString : function () {
 513         return 'Plane [' + this.position + ', d=' + this.d + ']';
 514     }
 515 }
 516 /* Fake a Flog.* namespace */
 517 if(typeof(Flog) == 'undefined') var Flog = {};
 518 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 519
 520 Flog.RayTracer.IntersectionInfo = Class.create();
 521
 522 Flog.RayTracer.IntersectionInfo.prototype = {
 523     isHit: false,
 524     hitCount: 0,
 525     shape: null,
 526     position: null,
 527     normal: null,
 528     color: null,
 529     distance: null,
 530
 531     initialize : function() {
 532         this.color = new Flog.RayTracer.Color(0,0,0);
 533     },
 534
 535     toString : function () {
 536         return 'Intersection [' + this.position + ']';
 537     }
 538 }
 539 /* Fake a Flog.* namespace */
 540 if(typeof(Flog) == 'undefined') var Flog = {};
 541 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 542
 543 Flog.RayTracer.Camera = Class.create();
 544
 545 Flog.RayTracer.Camera.prototype = {
 546     position: null,
 547     lookAt: null,
 548     equator: null,
 549     up: null,
 550     screen: null,
 551
 552     initialize : function(pos, lookAt, up) {
 553         this.position = pos;
 554         this.lookAt = lookAt;
 555         this.up = up;
 556         this.equator = lookAt.normalize().cross(this.up);
 557         this.screen = Flog.RayTracer.Vector.prototype.add(this.position, this.lookAt);
 558     },
 559
 560     getRay: function(vx, vy){
 561         var pos = Flog.RayTracer.Vector.prototype.subtract(
 562             this.screen,
 563             Flog.RayTracer.Vector.prototype.subtract(
 564                 Flog.RayTracer.Vector.prototype.multiplyScalar(this.equator, vx),
 565                 Flog.RayTracer.Vector.prototype.multiplyScalar(this.up, vy)
 566             )
 567         );
 568         pos.y = pos.y * -1;
 569         var dir = Flog.RayTracer.Vector.prototype.subtract(
 570             pos,
 571             this.position
 572         );
 573
 574         var ray = new Flog.RayTracer.Ray(pos, dir.normalize());
 575
 576         return ray;
 577     },
 578
 579     toString : function () {
 580         return 'Ray []';
 581     }
 582 }
 583 /* Fake a Flog.* namespace */
 584 if(typeof(Flog) == 'undefined') var Flog = {};
 585 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 586
 587 Flog.RayTracer.Background = Class.create();
 588
 589 Flog.RayTracer.Background.prototype = {
 590     color : null,
 591     ambience : 0.0,
 592
 593     initialize : function(color, ambience) {
 594         this.color = color;
 595         this.ambience = ambience;
 596     }
 597 }
 598 /* Fake a Flog.* namespace */
 599 if(typeof(Flog) == 'undefined') var Flog = {};
 600 if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
 601
 602 Flog.RayTracer.Engine = Class.create();
 603
 604 Flog.RayTracer.Engine.prototype = {
 605     canvas: null, /* 2d context we can render to */
 606
 607     initialize: function(options){
 608         this.options = Object.extend({
 609                 canvasHeight: 100,
 610                 canvasWidth: 100,
 611                 pixelWidth: 2,
 612                 pixelHeight: 2,
 613                 renderDiffuse: false,
 614                 renderShadows: false,
 615                 renderHighlights: false,
 616                 renderReflections: false,
 617                 rayDepth: 2
 618             }, options || {});
 619
 620         this.options.canvasHeight /= this.options.pixelHeight;
 621         this.options.canvasWidth /= this.options.pixelWidth;
 622
 623         /* TODO: dynamically include other scripts */
 624     },
 625
 626     setPixel: function(x, y, color){
 627         var pxW, pxH;
 628         pxW = this.options.pixelWidth;
 629         pxH = this.options.pixelHeight;
 630
 631         if (this.canvas) {
 632           this.canvas.fillStyle = color.toString();
 633           this.canvas.fillRect (x * pxW, y * pxH, pxW, pxH);
 634         } else {
 635           if (x ===  y) {
 636             checkNumber += color.brightness();
 637           }
 638           // print(x * pxW, y * pxH, pxW, pxH);
 639         }
 640     },
 641
 642     renderScene: function(scene, canvas){
 643         checkNumber = 0;
 644         /* Get canvas */
 645         if (canvas) {
 646           this.canvas = canvas.getContext("2d");
 647         } else {
 648           this.canvas = null;
 649         }
 650
 651         var canvasHeight = this.options.canvasHeight;
 652         var canvasWidth = this.options.canvasWidth;
 653
 654         for(var y=0; y < canvasHeight; y++){
 655             for(var x=0; x < canvasWidth; x++){
 656                 var yp = y * 1.0 / canvasHeight * 2 - 1;
 657                         var xp = x * 1.0 / canvasWidth * 2 - 1;
 658
 659                         var ray = scene.camera.getRay(xp, yp);
 660
 661                         var color = this.getPixelColor(ray, scene);
 662
 663                 this.setPixel(x, y, color);
 664             }
 665         }
 666         if (checkNumber !== 2321) {
 667           throw new Error("Scene rendered incorrectly");
 668         }
 669     },
 670
 671     getPixelColor: function(ray, scene){
 672         var info = this.testIntersection(ray, scene, null);
 673         if(info.isHit){
 674             var color = this.rayTrace(info, ray, scene, 0);
 675             return color;
 676         }
 677         return scene.background.color;
 678     },
 679
 680     testIntersection: function(ray, scene, exclude){
 681         var hits = 0;
 682         var best = new Flog.RayTracer.IntersectionInfo();
 683         best.distance = 2000;
 684
 685         for(var i=0; i<scene.shapes.length; i++){
 686             var shape = scene.shapes[i];
 687
 688             if(shape != exclude){
 689                 var info = shape.intersect(ray);
 690                 if(info.isHit && info.distance >= 0 && info.distance < best.distance){
 691                     best = info;
 692                     hits++;
 693                 }
 694             }
 695         }
 696         best.hitCount = hits;
 697         return best;
 698     },
 699
 700     getReflectionRay: function(P,N,V){
 701         var c1 = -N.dot(V);
 702         var R1 = Flog.RayTracer.Vector.prototype.add(
 703             Flog.RayTracer.Vector.prototype.multiplyScalar(N, 2*c1),
 704             V
 705         );
 706         return new Flog.RayTracer.Ray(P, R1);
 707     },
 708
 709     rayTrace: function(info, ray, scene, depth){
 710         // Calc ambient
 711         var color = Flog.RayTracer.Color.prototype.multiplyScalar(info.color, scene.background.ambience);
 712         var oldColor = color;
 713         var shininess = Math.pow(10, info.shape.material.gloss + 1);
 714
 715         for(var i=0; i<scene.lights.length; i++){
 716             var light = scene.lights[i];
 717
 718             // Calc diffuse lighting
 719             var v = Flog.RayTracer.Vector.prototype.subtract(
 720                                 light.position,
 721                                 info.position
 722                             ).normalize();
 723
 724             if(this.options.renderDiffuse){
 725                 var L = v.dot(info.normal);
 726                 if(L > 0.0){
 727                     color = Flog.RayTracer.Color.prototype.add(
 728                                         color,
 729                                         Flog.RayTracer.Color.prototype.multiply(
 730                                             info.color,
 731                                             Flog.RayTracer.Color.prototype.multiplyScalar(
 732                                                 light.color,
 733                                                 L
 734                                             )
 735                                         )
 736                                     );
 737                 }
 738             }
 739
 740             // The greater the depth the more accurate the colours, but
 741             // this is exponentially (!) expensive
 742             if(depth <= this.options.rayDepth){
 743           // calculate reflection ray
 744           if(this.options.renderReflections && info.shape.material.reflection > 0)
 745           {
 746               var reflectionRay = this.getReflectionRay(info.position, info.normal, ray.direction);
 747               var refl = this.testIntersection(reflectionRay, scene, info.shape);
 748
 749               if (refl.isHit && refl.distance > 0){
 750                   refl.color = this.rayTrace(refl, reflectionRay, scene, depth + 1);
 751               } else {
 752                   refl.color = scene.background.color;
 753                         }
 754
 755                   color = Flog.RayTracer.Color.prototype.blend(
 756                     color,
 757                     refl.color,
 758                     info.shape.material.reflection
 759                   );
 760           }
 761
 762                 // Refraction
 763                 /* TODO */
 764             }
 765
 766             /* Render shadows and highlights */
 767
 768             var shadowInfo = new Flog.RayTracer.IntersectionInfo();
 769
 770             if(this.options.renderShadows){
 771                 var shadowRay = new Flog.RayTracer.Ray(info.position, v);
 772
 773                 shadowInfo = this.testIntersection(shadowRay, scene, info.shape);
 774                 if(shadowInfo.isHit && shadowInfo.shape != info.shape /*&& shadowInfo.shape.type != 'PLANE'*/){
 775                     var vA = Flog.RayTracer.Color.prototype.multiplyScalar(color, 0.5);
 776                     var dB = (0.5 * Math.pow(shadowInfo.shape.material.transparency, 0.5));
 777                     color = Flog.RayTracer.Color.prototype.addScalar(vA,dB);
 778                 }
 779             }
 780
 781       // Phong specular highlights
 782       if(this.options.renderHighlights && !shadowInfo.isHit && info.shape.material.gloss > 0){
 783         var Lv = Flog.RayTracer.Vector.prototype.subtract(
 784                             info.shape.position,
 785                             light.position
 786                         ).normalize();
 787
 788         var E = Flog.RayTracer.Vector.prototype.subtract(
 789                             scene.camera.position,
 790                             info.shape.position
 791                         ).normalize();
 792
 793         var H = Flog.RayTracer.Vector.prototype.subtract(
 794                             E,
 795                             Lv
 796                         ).normalize();
 797
 798         var glossWeight = Math.pow(Math.max(info.normal.dot(H), 0), shininess);
 799         color = Flog.RayTracer.Color.prototype.add(
 800                             Flog.RayTracer.Color.prototype.multiplyScalar(light.color, glossWeight),
 801                             color
 802                         );
 803       }
 804         }
 805         color.limit();
 806         return color;
 807     }
 808 };
 809
 810
 811 function renderScene(){
 812     var scene = new Flog.RayTracer.Scene();
 813
 814     scene.camera = new Flog.RayTracer.Camera(
 815                         new Flog.RayTracer.Vector(0, 0, -15),
 816                         new Flog.RayTracer.Vector(-0.2, 0, 5),
 817                         new Flog.RayTracer.Vector(0, 1, 0)
 818                     );
 819
 820     scene.background = new Flog.RayTracer.Background(
 821                                 new Flog.RayTracer.Color(0.5, 0.5, 0.5),
 822                                 0.4
 823                             );
 824
 825     var sphere = new Flog.RayTracer.Shape.Sphere(
 826         new Flog.RayTracer.Vector(-1.5, 1.5, 2),
 827         1.5,
 828         new Flog.RayTracer.Material.Solid(
 829             new Flog.RayTracer.Color(0,0.5,0.5),
 830             0.3,
 831             0.0,
 832             0.0,
 833             2.0
 834         )
 835     );
 836
 837     var sphere1 = new Flog.RayTracer.Shape.Sphere(
 838         new Flog.RayTracer.Vector(1, 0.25, 1),
 839         0.5,
 840         new Flog.RayTracer.Material.Solid(
 841             new Flog.RayTracer.Color(0.9,0.9,0.9),
 842             0.1,
 843             0.0,
 844             0.0,
 845             1.5
 846         )
 847     );
 848
 849     var plane = new Flog.RayTracer.Shape.Plane(
 850                                 new Flog.RayTracer.Vector(0.1, 0.9, -0.5).normalize(),
 851                                 1.2,
 852                                 new Flog.RayTracer.Material.Chessboard(
 853                                     new Flog.RayTracer.Color(1,1,1),
 854                                     new Flog.RayTracer.Color(0,0,0),
 855                                     0.2,
 856                                     0.0,
 857                                     1.0,
 858                                     0.7
 859                                 )
 860                             );
 861
 862     scene.shapes.push(plane);
 863     scene.shapes.push(sphere);
 864     scene.shapes.push(sphere1);
 865
 866     var light = new Flog.RayTracer.Light(
 867         new Flog.RayTracer.Vector(5, 10, -1),
 868         new Flog.RayTracer.Color(0.8, 0.8, 0.8)
 869     );
 870
 871     var light1 = new Flog.RayTracer.Light(
 872         new Flog.RayTracer.Vector(-3, 5, -15),
 873         new Flog.RayTracer.Color(0.8, 0.8, 0.8),
 874         100
 875     );
 876
 877     scene.lights.push(light);
 878     scene.lights.push(light1);
 879
 880     var imageWidth = 100; // $F('imageWidth');
 881     var imageHeight = 100; // $F('imageHeight');
 882     var pixelSize = "5,5".split(','); //  $F('pixelSize').split(',');
 883     var renderDiffuse = true; // $F('renderDiffuse');
 884     var renderShadows = true; // $F('renderShadows');
 885     var renderHighlights = true; // $F('renderHighlights');
 886     var renderReflections = true; // $F('renderReflections');
 887     var rayDepth = 2;//$F('rayDepth');
 888
 889     var raytracer = new Flog.RayTracer.Engine(
 890         {
 891             canvasWidth: imageWidth,
 892             canvasHeight: imageHeight,
 893             pixelWidth: pixelSize[0],
 894             pixelHeight: pixelSize[1],
 895             "renderDiffuse": renderDiffuse,
 896             "renderHighlights": renderHighlights,
 897             "renderShadows": renderShadows,
 898             "renderReflections": renderReflections,
 899             "rayDepth": rayDepth
 900         }
 901     );
 902
 903     raytracer.renderScene(scene, null, 0);
 904 }