obelisk.js/src/geom/Matrix.js

JavaScript Library for Building Pixel Isometric Element with HTML5 Canvas

/*jslint node: true*/

'use strict';

var Matrix, p;
Matrix = function (a, b, c, d, tx, ty) {
    this.initialize(a, b, c, d, tx, ty);
};
p = Matrix.prototype;

// public properties:
/**
 * Position (0, 0) in a 3x3 matrix.
 * @property a
 * @type Number
 **/
p.a = 1;

/**
 * Position (0, 1) in a 3x3 matrix.
 * @property b
 * @type Number
 **/
p.b = 0;

/**
 * Position (1, 0) in a 3x3 matrix.
 * @property c
 * @type Number
 **/
p.c = 0;

/**
 * Position (1, 1) in a 3x3 matrix.
 * @property d
 * @type Number
 **/
p.d = 1;

/**
 * Position (2, 0) in a 3x3 matrix.
 * @property tx
 * @type Number
 **/
p.tx = 0;

/**
 * Position (2, 1) in a 3x3 matrix.
 * @property ty
 * @type Number
 **/
p.ty = 0;

// constructor
p.initialize = function (a, b, c, d, tx, ty) {
    this.a = (a === undefined) ? 1 : a;
    this.b = b || 0;
    this.c = c || 0;
    this.d = (d === undefined) ? 1 : d;
    this.tx = tx || 0;
    this.ty = ty || 0;

    return this;
};

// public methods
p.toString = function () {
    return '[Matrix]';
};

module.exports = Matrix;