mirror of
https://github.com/photonstorm/phaser
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175 lines
5.7 KiB
JavaScript
175 lines
5.7 KiB
JavaScript
/// <reference path="../_definitions.ts" />
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/**
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* Phaser - Mat3Utils
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*
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* A collection of methods useful for manipulating and performing operations on Mat3 objects.
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*
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*/
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var Phaser;
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(function (Phaser) {
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var Mat3Utils = (function () {
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function Mat3Utils() {
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}
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Mat3Utils.transpose = /**
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* Transpose the values of a Mat3
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**/
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function (source, dest) {
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if (typeof dest === "undefined") { dest = null; }
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if (dest === null) {
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// Transpose ourselves
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var a01 = source.data[1];
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var a02 = source.data[2];
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var a12 = source.data[5];
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source.data[1] = source.data[3];
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source.data[2] = source.data[6];
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source.data[3] = a01;
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source.data[5] = source.data[7];
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source.data[6] = a02;
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source.data[7] = a12;
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} else {
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source.data[0] = dest.data[0];
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source.data[1] = dest.data[3];
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source.data[2] = dest.data[6];
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source.data[3] = dest.data[1];
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source.data[4] = dest.data[4];
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source.data[5] = dest.data[7];
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source.data[6] = dest.data[2];
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source.data[7] = dest.data[5];
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source.data[8] = dest.data[8];
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}
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return source;
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};
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Mat3Utils.invert = /**
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* Inverts a Mat3
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**/
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function (source) {
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var a00 = source.data[0];
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var a01 = source.data[1];
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var a02 = source.data[2];
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var a10 = source.data[3];
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var a11 = source.data[4];
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var a12 = source.data[5];
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var a20 = source.data[6];
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var a21 = source.data[7];
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var a22 = source.data[8];
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var b01 = a22 * a11 - a12 * a21;
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var b11 = -a22 * a10 + a12 * a20;
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var b21 = a21 * a10 - a11 * a20;
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// Determinant
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var det = a00 * b01 + a01 * b11 + a02 * b21;
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if (!det) {
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return null;
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}
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det = 1.0 / det;
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source.data[0] = b01 * det;
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source.data[1] = (-a22 * a01 + a02 * a21) * det;
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source.data[2] = (a12 * a01 - a02 * a11) * det;
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source.data[3] = b11 * det;
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source.data[4] = (a22 * a00 - a02 * a20) * det;
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source.data[5] = (-a12 * a00 + a02 * a10) * det;
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source.data[6] = b21 * det;
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source.data[7] = (-a21 * a00 + a01 * a20) * det;
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source.data[8] = (a11 * a00 - a01 * a10) * det;
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return source;
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};
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Mat3Utils.adjoint = /**
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* Calculates the adjugate of a Mat3
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**/
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function (source) {
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var a00 = source.data[0];
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var a01 = source.data[1];
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var a02 = source.data[2];
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var a10 = source.data[3];
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var a11 = source.data[4];
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var a12 = source.data[5];
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var a20 = source.data[6];
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var a21 = source.data[7];
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var a22 = source.data[8];
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source.data[0] = (a11 * a22 - a12 * a21);
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source.data[1] = (a02 * a21 - a01 * a22);
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source.data[2] = (a01 * a12 - a02 * a11);
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source.data[3] = (a12 * a20 - a10 * a22);
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source.data[4] = (a00 * a22 - a02 * a20);
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source.data[5] = (a02 * a10 - a00 * a12);
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source.data[6] = (a10 * a21 - a11 * a20);
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source.data[7] = (a01 * a20 - a00 * a21);
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source.data[8] = (a00 * a11 - a01 * a10);
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return source;
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};
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Mat3Utils.determinant = /**
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* Calculates the adjugate of a Mat3
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**/
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function (source) {
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var a00 = source.data[0];
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var a01 = source.data[1];
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var a02 = source.data[2];
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var a10 = source.data[3];
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var a11 = source.data[4];
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var a12 = source.data[5];
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var a20 = source.data[6];
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var a21 = source.data[7];
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var a22 = source.data[8];
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return a00 * (a22 * a11 - a12 * a21) + a01 * (-a22 * a10 + a12 * a20) + a02 * (a21 * a10 - a11 * a20);
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};
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Mat3Utils.multiply = /**
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* Multiplies two Mat3s
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**/
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function (source, b) {
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var a00 = source.data[0];
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var a01 = source.data[1];
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var a02 = source.data[2];
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var a10 = source.data[3];
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var a11 = source.data[4];
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var a12 = source.data[5];
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var a20 = source.data[6];
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var a21 = source.data[7];
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var a22 = source.data[8];
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var b00 = b.data[0];
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var b01 = b.data[1];
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var b02 = b.data[2];
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var b10 = b.data[3];
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var b11 = b.data[4];
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var b12 = b.data[5];
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var b20 = b.data[6];
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var b21 = b.data[7];
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var b22 = b.data[8];
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source.data[0] = b00 * a00 + b01 * a10 + b02 * a20;
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source.data[1] = b00 * a01 + b01 * a11 + b02 * a21;
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source.data[2] = b00 * a02 + b01 * a12 + b02 * a22;
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source.data[3] = b10 * a00 + b11 * a10 + b12 * a20;
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source.data[4] = b10 * a01 + b11 * a11 + b12 * a21;
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source.data[5] = b10 * a02 + b11 * a12 + b12 * a22;
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source.data[6] = b20 * a00 + b21 * a10 + b22 * a20;
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source.data[7] = b20 * a01 + b21 * a11 + b22 * a21;
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source.data[8] = b20 * a02 + b21 * a12 + b22 * a22;
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return source;
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};
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Mat3Utils.fromQuaternion = function () {
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};
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Mat3Utils.normalFromMat4 = function () {
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};
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return Mat3Utils;
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})();
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Phaser.Mat3Utils = Mat3Utils;
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})(Phaser || (Phaser = {}));
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