1 files changed, 104 insertions, 0 deletions

diff --git a/js/lib/math/matrix.js b/js/lib/math/matrix.js
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+++ b/js/lib/math/matrix.js
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+/* <copyright>
+This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
+No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
+(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
+</copyright> */
+
+var Matrix = function Matrix() {
+
+};
+
+Matrix.create = function( rowArray ) {
+        var mat = Matrix.I(4);
+        var index = 0;
+        for(var j=0;  j<4;  j++) {
+                for (var i=0;  i<4;  i++) {
+                        mat[index] = rowArray[i][j];
+                        index++;
+                }
+        }
+
+        return mat;
+};
+
+Matrix.I = function(dimen) {
+        var mat = [];
+
+        for (var i = 0; i<dimen*dimen; i++)  {
+        mat.push(0);
+    }
+
+        var index = 0;
+        for (var j = 0; j<dimen; j++) {
+                mat[index] = 1.0;
+                index += dimen + 1;
+        }
+        
+        return mat;     
+};
+
+Matrix.Translation = function (vec) {
+        var mat = Matrix.I(4);
+        glmat4.translate(mat, vec);
+        return mat;
+};
+
+Matrix.RotationX = function( angle ) {
+        var mat = Matrix.I(4);
+        glmat4.rotateX(mat, angle);
+        return mat;
+};
+
+Matrix.RotationY = function( angle ) {
+        var mat = Matrix.I(4);
+        glmat4.rotateY(mat, angle);
+        return mat;
+};
+
+Matrix.RotationZ = function( angle ) {
+        var mat = Matrix.I(4);
+        glmat4.rotateZ(mat, angle);
+        return mat;
+};
+
+Matrix.Rotation = function(angle, axis) {
+    var mat = Matrix.I(4);
+    glmat4.rotate(mat, angle, axis);
+    return mat;
+};
+
+Matrix.flatten = function (mat) {
+    var result = [];
+    if (this.elements.length == 0) {
+        return [];
+    }
+
+        for (var i=0; i<16; i++) {
+        result.push(mat[i]);
+    }
+
+    return result;
+};
+
+Matrix.makePerspective = function (fovy, aspect, znear, zfar) {
+    var ymax = znear * Math.tan(fovy * Math.PI / 360.0);
+    var ymin = -ymax;
+    var xmin = ymin * aspect;
+    var xmax = ymax * aspect;
+
+    //return makeFrustum(xmin, xmax, ymin, ymax, znear, zfar);
+
+    var X = 2*znear/(xmax-xmin);
+    var Y = 2*znear/(ymax-ymin);
+    var A = (xmax+xmin)/(xmax-xmin);
+    var B = (ymax+ymin)/(ymax-ymin);
+    var C = -(zfar+znear)/(zfar-znear);
+    var D = -2*zfar*znear/(zfar-znear);
+
+    return Matrix.create([[X, 0, A, 0], [0, Y, B, 0], [0, 0, C, D], [0, 0, -1, 0]]);
+
+};
+
+// Namepace this class
+// TODO
+window.Matrix = Matrix;