- /**
- * Matrix is a class that allows for the manipulation of a transform matrix.
- * This class is a work in progress.
- *
- * @class Matrix
- * @constructor
- * @module matrix
- */
- var Matrix = function(config) {
- this.init(config);
- };
- Matrix.prototype = {
- /**
- * Used as value for the _rounding method.
- *
- * @property _rounder
- * @private
- */
- _rounder: 100000,
- /**
- * Updates the matrix.
- *
- * @method multiple
- * @param {Number} a
- * @param {Number} b
- * @param {Number} c
- * @param {Number} d
- * @param {Number} dx
- * @param {Number} dy
- */
- multiply: function(a, b, c, d, dx, dy) {
- var matrix = this,
- matrix_a = matrix.a * a + matrix.c * b,
- matrix_b = matrix.b * a + matrix.d * b,
- matrix_c = matrix.a * c + matrix.c * d,
- matrix_d = matrix.b * c + matrix.d * d,
- matrix_dx = matrix.a * dx + matrix.c * dy + matrix.dx,
- matrix_dy = matrix.b * dx + matrix.d * dy + matrix.dy;
- matrix.a = this._round(matrix_a);
- matrix.b = this._round(matrix_b);
- matrix.c = this._round(matrix_c);
- matrix.d = this._round(matrix_d);
- matrix.dx = this._round(matrix_dx);
- matrix.dy = this._round(matrix_dy);
- return this;
- },
- /**
- * Parses a string and updates the matrix.
- *
- * @method applyCSSText
- * @param {String} val A css transform string
- */
- applyCSSText: function(val) {
- var re = /\s*([a-z]*)\(([\w,\.,\-,\s]*)\)/gi,
- args,
- m;
- val = val.replace(/matrix/g, "multiply");
- while ((m = re.exec(val))) {
- if (typeof this[m[1]] === 'function') {
- args = m[2].split(',');
- this[m[1]].apply(this, args);
- }
- }
- },
- /**
- * Parses a string and returns an array of transform arrays.
- *
- * @method getTransformArray
- * @param {String} val A css transform string
- * @return Array
- */
- getTransformArray: function(val) {
- var re = /\s*([a-z]*)\(([\w,\.,\-,\s]*)\)/gi,
- transforms = [],
- args,
- m;
- val = val.replace(/matrix/g, "multiply");
- while ((m = re.exec(val))) {
- if (typeof this[m[1]] === 'function') {
- args = m[2].split(',');
- args.unshift(m[1]);
- transforms.push(args);
- }
- }
- return transforms;
- },
- /**
- * Default values for the matrix
- *
- * @property _defaults
- * @private
- */
- _defaults: {
- a: 1,
- b: 0,
- c: 0,
- d: 1,
- dx: 0,
- dy: 0
- },
- /**
- * Rounds values
- *
- * @method _round
- * @private
- */
- _round: function(val) {
- val = Math.round(val * this._rounder) / this._rounder;
- return val;
- },
- /**
- * Initializes a matrix.
- *
- * @method init
- * @param {Object} config Specified key value pairs for matrix properties. If a property is not explicitly defined in the config argument,
- * the default value will be used.
- */
- init: function(config) {
- var defaults = this._defaults,
- prop;
- config = config || {};
- for (prop in defaults) {
- if(defaults.hasOwnProperty(prop))
- {
- this[prop] = (prop in config) ? config[prop] : defaults[prop];
- }
- }
- this._config = config;
- },
- /**
- * Applies a scale transform
- *
- * @method scale
- * @param {Number} val
- */
- scale: function(x, y) {
- this.multiply(x, 0, 0, y, 0, 0);
- return this;
- },
- /**
- * Applies a skew transformation.
- *
- * @method skew
- * @param {Number} x The value to skew on the x-axis.
- * @param {Number} y The value to skew on the y-axis.
- */
- skew: function(x, y) {
- x = x || 0;
- y = y || 0;
- if (x !== undefined) { // null or undef
- x = Math.tan(this.angle2rad(x));
- }
- if (y !== undefined) { // null or undef
- y = Math.tan(this.angle2rad(y));
- }
- this.multiply(1, y, x, 1, 0, 0);
- return this;
- },
- /**
- * Applies a skew to the x-coordinate
- *
- * @method skewX
- * @param {Number} x x-coordinate
- */
- skewX: function(x) {
- this.skew(x);
- return this;
- },
- /**
- * Applies a skew to the y-coordinate
- *
- * @method skewY
- * @param {Number} y y-coordinate
- */
- skewY: function(y) {
- this.skew(null, y);
- return this;
- },
- /**
- * Returns a string of text that can be used to populate a the css transform property of an element.
- *
- * @method toCSSText
- * @return String
- */
- toCSSText: function() {
- var matrix = this,
- text = 'matrix(' +
- matrix.a + ',' +
- matrix.b + ',' +
- matrix.c + ',' +
- matrix.d + ',' +
- matrix.dx + ',' +
- matrix.dy + ')';
- return text;
- },
- /**
- * Returns a string that can be used to populate the css filter property of an element.
- *
- * @method toFilterText
- * @return String
- */
- toFilterText: function() {
- var matrix = this,
- text = 'progid:DXImageTransform.Microsoft.Matrix(';
- text += 'M11=' + matrix.a + ',' +
- 'M21=' + matrix.b + ',' +
- 'M12=' + matrix.c + ',' +
- 'M22=' + matrix.d + ',' +
- 'sizingMethod="auto expand")';
- text += '';
- return text;
- },
- /**
- * Converts a radian value to a degree.
- *
- * @method rad2deg
- * @param {Number} rad Radian value to be converted.
- * @return Number
- */
- rad2deg: function(rad) {
- var deg = rad * (180 / Math.PI);
- return deg;
- },
- /**
- * Converts a degree value to a radian.
- *
- * @method deg2rad
- * @param {Number} deg Degree value to be converted to radian.
- * @return Number
- */
- deg2rad: function(deg) {
- var rad = deg * (Math.PI / 180);
- return rad;
- },
- angle2rad: function(val) {
- if (typeof val === 'string' && val.indexOf('rad') > -1) {
- val = parseFloat(val);
- } else { // default to deg
- val = this.deg2rad(parseFloat(val));
- }
- return val;
- },
- /**
- * Applies a rotate transform.
- *
- * @method rotate
- * @param {Number} deg The degree of the rotation.
- */
- rotate: function(deg, x, y) {
- var rad = this.angle2rad(deg),
- sin = Math.sin(rad),
- cos = Math.cos(rad);
- this.multiply(cos, sin, 0 - sin, cos, 0, 0);
- return this;
- },
- /**
- * Applies translate transformation.
- *
- * @method translate
- * @param {Number} x The value to transate on the x-axis.
- * @param {Number} y The value to translate on the y-axis.
- */
- translate: function(x, y) {
- x = parseFloat(x) || 0;
- y = parseFloat(y) || 0;
- this.multiply(1, 0, 0, 1, x, y);
- return this;
- },
- /**
- * Applies a translate to the x-coordinate
- *
- * @method translateX
- * @param {Number} x x-coordinate
- */
- translateX: function(x) {
- this.translate(x);
- return this;
- },
- /**
- * Applies a translate to the y-coordinate
- *
- * @method translateY
- * @param {Number} y y-coordinate
- */
- translateY: function(y) {
- this.translate(null, y);
- return this;
- },
- /**
- * Returns an identity matrix.
- *
- * @method identity
- * @return Object
- */
- identity: function() {
- var config = this._config,
- defaults = this._defaults,
- prop;
- for (prop in config) {
- if (prop in defaults) {
- this[prop] = defaults[prop];
- }
- }
- return this;
- },
- /**
- * Returns a 3x3 Matrix array
- *
- * / \
- * | matrix[0][0] matrix[1][0] matrix[2][0] |
- * | matrix[0][1] matrix[1][1] matrix[2][1] |
- * | matrix[0][2] matrix[1][2] matrix[2][2] |
- * \ /
- *
- * @method getMatrixArray
- * @return Array
- */
- getMatrixArray: function()
- {
- var matrix = this,
- matrixArray = [
- [matrix.a, matrix.c, matrix.dx],
- [matrix.b, matrix.d, matrix.dy],
- [0, 0, 1]
- ];
- return matrixArray;
- },
- /**
- * Returns the left, top, right and bottom coordinates for a transformed
- * item.
- *
- * @method getContentRect
- * @param {Number} width The width of the item.
- * @param {Number} height The height of the item.
- * @param {Number} x The x-coordinate of the item.
- * @param {Number} y The y-coordinate of the item.
- * @return Object
- */
- getContentRect: function(width, height, x, y)
- {
- var left = !isNaN(x) ? x : 0,
- top = !isNaN(y) ? y : 0,
- right = left + width,
- bottom = top + height,
- matrix = this,
- a = matrix.a,
- b = matrix.b,
- c = matrix.c,
- d = matrix.d,
- dx = matrix.dx,
- dy = matrix.dy,
- x1 = (a * left + c * top + dx),
- y1 = (b * left + d * top + dy),
- //[x2, y2]
- x2 = (a * right + c * top + dx),
- y2 = (b * right + d * top + dy),
- //[x3, y3]
- x3 = (a * left + c * bottom + dx),
- y3 = (b * left + d * bottom + dy),
- //[x4, y4]
- x4 = (a * right + c * bottom + dx),
- y4 = (b * right + d * bottom + dy);
- return {
- left: Math.min(x3, Math.min(x1, Math.min(x2, x4))),
- right: Math.max(x3, Math.max(x1, Math.max(x2, x4))),
- top: Math.min(y2, Math.min(y4, Math.min(y3, y1))),
- bottom: Math.max(y2, Math.max(y4, Math.max(y3, y1)))
- };
- },
- /**
- * Returns the determinant of the matrix.
- *
- * @method getDeterminant
- * @return Number
- */
- getDeterminant: function()
- {
- return Y.MatrixUtil.getDeterminant(this.getMatrixArray());
- },
- /**
- * Returns the inverse (in array form) of the matrix.
- *
- * @method inverse
- * @return Array
- */
- inverse: function()
- {
- return Y.MatrixUtil.inverse(this.getMatrixArray());
- },
- /**
- * Returns the transpose of the matrix
- *
- * @method transpose
- * @return Array
- */
- transpose: function()
- {
- return Y.MatrixUtil.transpose(this.getMatrixArray());
- },
- /**
- * Returns an array of transform commands that represent the matrix.
- *
- * @method decompose
- * @return Array
- */
- decompose: function()
- {
- return Y.MatrixUtil.decompose(this.getMatrixArray());
- }
- };
- Y.Matrix = Matrix;
-