The Tor Browser: js/src/devtools/jint/sunspider/3d-cube.js@b8a032363ba2 (annotated)

js/src/devtools/jint/sunspider/3d-cube.js@b8a032363ba2 (annotated)

js/src/devtools/jint/sunspider/3d-cube.js

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 // 3D Cube Rotation
 // http://www.speich.net/computer/moztesting/3d.htm
 // Created by Simon Speich
 var Q = new Array();
 var MTrans = new Array();  // transformation matrix
 var MQube = new Array();  // position information of qube
 var I = new Array();      // entity matrix
 var Origin = new Object();
 var Testing = new Object();
 var LoopTimer;
 var DisplArea = new Object();
 DisplArea.Width = 300;
 DisplArea.Height = 300;
 function DrawLine(From, To) {
   var x1 = From.V[0];
   var x2 = To.V[0];
   var y1 = From.V[1];
   var y2 = To.V[1];
   var dx = Math.abs(x2 - x1);
   var dy = Math.abs(y2 - y1);
   var x = x1;
   var y = y1;
   var IncX1, IncY1;
   var IncX2, IncY2;
   var Den;
   var Num;
   var NumAdd;
   var NumPix;
   if (x2 >= x1) {  IncX1 = 1; IncX2 = 1;  }
   else { IncX1 = -1; IncX2 = -1; }
   if (y2 >= y1)  {  IncY1 = 1; IncY2 = 1; }
   else { IncY1 = -1; IncY2 = -1; }
   if (dx >= dy) {
     IncX1 = 0;
     IncY2 = 0;
     Den = dx;
     Num = dx / 2;
     NumAdd = dy;
     NumPix = dx;
   }
   else {
     IncX2 = 0;
     IncY1 = 0;
     Den = dy;
     Num = dy / 2;
     NumAdd = dx;
     NumPix = dy;
   }
   NumPix = Math.round(Q.LastPx + NumPix);
   var i = Q.LastPx;
 /* BEGIN LOOP */
   for (; i < NumPix; i++) {
     Num += NumAdd;
     if (Num >= Den) {
       Num -= Den;
       x += IncX1;
       y += IncY1;
     }
     x += IncX2;
     y += IncY2;
   }
 /* END LOOP */
   Q.LastPx = NumPix;
 }
 function CalcCross(V0, V1) {
   var Cross = new Array();
   Cross[0] = V0[1]*V1[2] - V0[2]*V1[1];
   Cross[1] = V0[2]*V1[0] - V0[0]*V1[2];
   Cross[2] = V0[0]*V1[1] - V0[1]*V1[0];
   return Cross;
 }
 function CalcNormal(V0, V1, V2) {
   var A = new Array();   var B = new Array();
 /* BEGIN LOOP */
   for (var i = 0; i < 3; i++) {
     A[i] = V0[i] - V1[i];
     B[i] = V2[i] - V1[i];
   }
 /* END LOOP */
   A = CalcCross(A, B);
   var Length = Math.sqrt(A[0]*A[0] + A[1]*A[1] + A[2]*A[2]);
 /* BEGIN LOOP */
   for (var i = 0; i < 3; i++) A[i] = A[i] / Length;
 /* END LOOP */
   A[3] = 1;
   return A;
 }
 function CreateP(X,Y,Z) {
   this.V = [X,Y,Z,1];
 }
 // multiplies two matrices
 function MMulti(M1, M2) {
   var M = [[],[],[],[]];
   var i = 0;
   var j = 0;
 /* BEGIN LOOP */
   for (; i < 4; i++) {
     j = 0;
 /* BEGIN LOOP */
     for (; j < 4; j++) M[i][j] = M1[i][0] * M2[0][j] + M1[i][1] * M2[1][j] + M1[i][2] * M2[2][j] + M1[i][3] * M2[3][j];
 /* END LOOP */
   }
 /* END LOOP */
   return M;
 }
 //multiplies matrix with vector
 function VMulti(M, V) {
   var Vect = new Array();
   var i = 0;
 /* BEGIN LOOP */
   for (;i < 4; i++) Vect[i] = M[i][0] * V[0] + M[i][1] * V[1] + M[i][2] * V[2] + M[i][3] * V[3];
 /* END LOOP */
   return Vect;
 }
 function VMulti2(M, V) {
   var Vect = new Array();
   var i = 0;
 /* BEGIN LOOP */
   for (;i < 3; i++) Vect[i] = M[i][0] * V[0] + M[i][1] * V[1] + M[i][2] * V[2];
 /* END LOOP */
   return Vect;
 }
 // add to matrices
 function MAdd(M1, M2) {
   var M = [[],[],[],[]];
   var i = 0;
   var j = 0;
 /* BEGIN LOOP */
   for (; i < 4; i++) {
     j = 0;
 /* BEGIN LOOP */
     for (; j < 4; j++) M[i][j] = M1[i][j] + M2[i][j];
 /* END LOOP */
   }
 /* END LOOP */
   return M;
 }
 function Translate(M, Dx, Dy, Dz) {
   var T = [
   [1,0,0,Dx],
   [0,1,0,Dy],
   [0,0,1,Dz],
   [0,0,0,1]
   ];
   return MMulti(T, M);
 }
 function RotateX(M, Phi) {
   var a = Phi;
   a *= Math.PI / 180;
   var Cos = Math.cos(a);
   var Sin = Math.sin(a);
   var R = [
   [1,0,0,0],
   [0,Cos,-Sin,0],
   [0,Sin,Cos,0],
   [0,0,0,1]
   ];
   return MMulti(R, M);
 }
 function RotateY(M, Phi) {
   var a = Phi;
   a *= Math.PI / 180;
   var Cos = Math.cos(a);
   var Sin = Math.sin(a);
   var R = [
   [Cos,0,Sin,0],
   [0,1,0,0],
   [-Sin,0,Cos,0],
   [0,0,0,1]
   ];
   return MMulti(R, M);
 }
 function RotateZ(M, Phi) {
   var a = Phi;
   a *= Math.PI / 180;
   var Cos = Math.cos(a);
   var Sin = Math.sin(a);
   var R = [
   [Cos,-Sin,0,0],
   [Sin,Cos,0,0],
   [0,0,1,0],
   [0,0,0,1]
   ];
   return MMulti(R, M);
 }
 function DrawQube() {
   // calc current normals
   var CurN = new Array();
   var i = 5;
   Q.LastPx = 0;
 /* BEGIN LOOP */
   for (; i > -1; i--) CurN[i] = VMulti2(MQube, Q.Normal[i]);
 /* END LOOP */
   if (CurN[0][2] < 0) {
     if (!Q.Line[0]) { DrawLine(Q[0], Q[1]); Q.Line[0] = true; };
     if (!Q.Line[1]) { DrawLine(Q[1], Q[2]); Q.Line[1] = true; };
     if (!Q.Line[2]) { DrawLine(Q[2], Q[3]); Q.Line[2] = true; };
     if (!Q.Line[3]) { DrawLine(Q[3], Q[0]); Q.Line[3] = true; };
   }
   if (CurN[1][2] < 0) {
     if (!Q.Line[2]) { DrawLine(Q[3], Q[2]); Q.Line[2] = true; };
     if (!Q.Line[9]) { DrawLine(Q[2], Q[6]); Q.Line[9] = true; };
     if (!Q.Line[6]) { DrawLine(Q[6], Q[7]); Q.Line[6] = true; };
     if (!Q.Line[10]) { DrawLine(Q[7], Q[3]); Q.Line[10] = true; };
   }
   if (CurN[2][2] < 0) {
     if (!Q.Line[4]) { DrawLine(Q[4], Q[5]); Q.Line[4] = true; };
     if (!Q.Line[5]) { DrawLine(Q[5], Q[6]); Q.Line[5] = true; };
     if (!Q.Line[6]) { DrawLine(Q[6], Q[7]); Q.Line[6] = true; };
     if (!Q.Line[7]) { DrawLine(Q[7], Q[4]); Q.Line[7] = true; };
   }
   if (CurN[3][2] < 0) {
     if (!Q.Line[4]) { DrawLine(Q[4], Q[5]); Q.Line[4] = true; };
     if (!Q.Line[8]) { DrawLine(Q[5], Q[1]); Q.Line[8] = true; };
     if (!Q.Line[0]) { DrawLine(Q[1], Q[0]); Q.Line[0] = true; };
     if (!Q.Line[11]) { DrawLine(Q[0], Q[4]); Q.Line[11] = true; };
   }
   if (CurN[4][2] < 0) {
     if (!Q.Line[11]) { DrawLine(Q[4], Q[0]); Q.Line[11] = true; };
     if (!Q.Line[3]) { DrawLine(Q[0], Q[3]); Q.Line[3] = true; };
     if (!Q.Line[10]) { DrawLine(Q[3], Q[7]); Q.Line[10] = true; };
     if (!Q.Line[7]) { DrawLine(Q[7], Q[4]); Q.Line[7] = true; };
   }
   if (CurN[5][2] < 0) {
     if (!Q.Line[8]) { DrawLine(Q[1], Q[5]); Q.Line[8] = true; };
     if (!Q.Line[5]) { DrawLine(Q[5], Q[6]); Q.Line[5] = true; };
     if (!Q.Line[9]) { DrawLine(Q[6], Q[2]); Q.Line[9] = true; };
     if (!Q.Line[1]) { DrawLine(Q[2], Q[1]); Q.Line[1] = true; };
   }
   Q.Line = [false,false,false,false,false,false,false,false,false,false,false,false];
   Q.LastPx = 0;
 }
 function Loop() {
   if (Testing.LoopCount > Testing.LoopMax) return;
   var TestingStr = String(Testing.LoopCount);
 /* BEGIN LOOP */
   while (TestingStr.length < 3) TestingStr = "0" + TestingStr;
 /* END LOOP */
   MTrans = Translate(I, -Q[8].V[0], -Q[8].V[1], -Q[8].V[2]);
   MTrans = RotateX(MTrans, 1);
   MTrans = RotateY(MTrans, 3);
   MTrans = RotateZ(MTrans, 5);
   MTrans = Translate(MTrans, Q[8].V[0], Q[8].V[1], Q[8].V[2]);
   MQube = MMulti(MTrans, MQube);
   var i = 8;
 /* BEGIN LOOP */
   for (; i > -1; i--) {
     Q[i].V = VMulti(MTrans, Q[i].V);
   }
 /* END LOOP */
   DrawQube();
   Testing.LoopCount++;
   Loop();
 }
 function Init(CubeSize) {
   // init/reset vars
   Origin.V = [150,150,20,1];
   Testing.LoopCount = 0;
   Testing.LoopMax = 50;
   Testing.TimeMax = 0;
   Testing.TimeAvg = 0;
   Testing.TimeMin = 0;
   Testing.TimeTemp = 0;
   Testing.TimeTotal = 0;
   Testing.Init = false;
   // transformation matrix
   MTrans = [
   [1,0,0,0],
   [0,1,0,0],
   [0,0,1,0],
   [0,0,0,1]
   ];
   // position information of qube
   MQube = [
   [1,0,0,0],
   [0,1,0,0],
   [0,0,1,0],
   [0,0,0,1]
   ];
   // entity matrix
   I = [
   [1,0,0,0],
   [0,1,0,0],
   [0,0,1,0],
   [0,0,0,1]
   ];
   // create qube
   Q[0] = new CreateP(-CubeSize,-CubeSize, CubeSize);
   Q[1] = new CreateP(-CubeSize, CubeSize, CubeSize);
   Q[2] = new CreateP( CubeSize, CubeSize, CubeSize);
   Q[3] = new CreateP( CubeSize,-CubeSize, CubeSize);
   Q[4] = new CreateP(-CubeSize,-CubeSize,-CubeSize);
   Q[5] = new CreateP(-CubeSize, CubeSize,-CubeSize);
   Q[6] = new CreateP( CubeSize, CubeSize,-CubeSize);
   Q[7] = new CreateP( CubeSize,-CubeSize,-CubeSize);
   // center of gravity
   Q[8] = new CreateP(0, 0, 0);
   // anti-clockwise edge check
   Q.Edge = [[0,1,2],[3,2,6],[7,6,5],[4,5,1],[4,0,3],[1,5,6]];
   // calculate squad normals
   Q.Normal = new Array();
 /* BEGIN LOOP */
   for (var i = 0; i < Q.Edge.length; i++) Q.Normal[i] = CalcNormal(Q[Q.Edge[i][0]].V, Q[Q.Edge[i][1]].V, Q[Q.Edge[i][2]].V);
 /* END LOOP */
   // line drawn ?
   Q.Line = [false,false,false,false,false,false,false,false,false,false,false,false];
   // create line pixels
   Q.NumPx = 9 * 2 * CubeSize;
 /* BEGIN LOOP */
   for (var i = 0; i < Q.NumPx; i++) CreateP(0,0,0);
 /* END LOOP */
   MTrans = Translate(MTrans, Origin.V[0], Origin.V[1], Origin.V[2]);
   MQube = MMulti(MTrans, MQube);
   var i = 0;
 /* BEGIN LOOP */
   for (; i < 9; i++) {
     Q[i].V = VMulti(MTrans, Q[i].V);
   }
 /* END LOOP */
   DrawQube();
   Testing.Init = true;
   Loop();
 }
 /* BEGIN LOOP */
 for ( var i = 20; i <= 160; i *= 2 ) {
   Init(i);
 }
 /* END LOOP */
 Q = null;
 MTrans = null;
 MQube = null;
 I = null;
 Origin = null;
 Testing = null;
 LoopTime = null;
 DisplArea = null;