javascript
/
tentone.escher.js
дзеркало https://github.com/tentone/escher.js.git


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JSDoc: Source: math/Matrix.js</title>

    <script src="scripts/prettify/prettify.js"> </script>
    <script src="scripts/prettify/lang-css.js"> </script>
    <!--[if lt IE 9]>
      <script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif]-->
    <link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
    <link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>

<body>

<div id="main">

    <h1 class="page-title">Source: math/Matrix.js</h1>

    
    <section>
        <article>
            <pre class="prettyprint source linenums"><code>"use strict";

import {Vector2} from "./Vector2.js";

/**
 * 2D 3x2 transformation matrix, applied to the canvas elements.
 *
 * The values of the matrix are stored in a numeric array.
 *
 * @class
 * @param {array} [values]
 */
function Matrix(values)
{
	if(values !== undefined)
	{
		this.m = values;
	}
	else
	{
		this.identity();
	}
}

/**
 * Copy the content of another matrix and store in this one.
 */
Matrix.prototype.copy = function(mat)
{
	this.m = mat.m.slice(0);
};

/**
 * Create a new matrix object with a copy of the content of this one.
 */
Matrix.prototype.clone = function()
{
	return new Matrix(this.m.slice(0))
};

/**
 * Reset this matrix to indentity.
 */
Matrix.prototype.identity = function()
{
	this.m = [1, 0, 0, 1, 0, 0];
};

/**
 * Multiply another matrix by this one and store the result.
 *
 * @param mat Matrix array.
 */
Matrix.prototype.multiply = function(mat)
{
	var m0 = this.m[0] * mat.m[0] + this.m[2] * mat.m[1];
	var m1 = this.m[1] * mat.m[0] + this.m[3] * mat.m[1];
	var m2 = this.m[0] * mat.m[2] + this.m[2] * mat.m[3];
	var m3 = this.m[1] * mat.m[2] + this.m[3] * mat.m[3];
	var m4 = this.m[0] * mat.m[4] + this.m[2] * mat.m[5] + this.m[4];
	var m5 = this.m[1] * mat.m[4] + this.m[3] * mat.m[5] + this.m[5];
	
	this.m = [m0, m1, m2, m3, m4, m5];
};

/**
 * Premultiply another matrix by this one and store the result.
 *
 * @param mat Matrix array to multiply.
 */
Matrix.prototype.premultiply = function(mat)
{
	var m0 = mat.m[0] * this.m[0] + mat.m[2] * this.m[1];
	var m1 = mat.m[1] * this.m[0] + mat.m[3] * this.m[1];
	var m2 = mat.m[0] * this.m[2] + mat.m[2] * this.m[3];
	var m3 = mat.m[1] * this.m[2] + mat.m[3] * this.m[3];
	var m4 = mat.m[0] * this.m[4] + mat.m[2] * this.m[5] + mat.m[4];
	var m5 = mat.m[1] * this.m[4] + mat.m[3] * this.m[5] + mat.m[5];
	
	this.m = [m0, m1, m2, m3, m4, m5];
};

/**
 * Compose this transformation matrix with position scale and rotation and origin point.
 */
Matrix.prototype.compose = function(px, py, sx, sy, ox, oy, a)
{
	this.m = [1, 0, 0, 1, px, py];

	if(a !== 0)
	{		
		var c = Math.cos(a);
		var s = Math.sin(a);
		this.multiply(new Matrix([c, s, -s, c, 0, 0]));
	}

	if(ox !== 0 || oy !== 0)
	{	
		this.multiply(new Matrix([1, 0, 0, 1, -ox, -oy]));
	}

	if(sx !== 1 || sy !== 1)
	{
		this.scale(sx, sy);
	}
};

/**
 * Apply translation to this matrix.
 */
Matrix.prototype.translate = function(x, y)
{
	this.m[4] += this.m[0] * x + this.m[2] * y;
	this.m[5] += this.m[1] * x + this.m[3] * y;
};

/**
 * Apply rotation to this matrix.
 *
 * @param angle Angle in radians.
 */
Matrix.prototype.rotate = function(rad)
{
	var c = Math.cos(rad);
	var s = Math.sin(rad);

	var m11 = this.m[0] * c + this.m[2] * s;
	var m12 = this.m[1] * c + this.m[3] * s;
	var m21 = this.m[0] * -s + this.m[2] * c;
	var m22 = this.m[1] * -s + this.m[3] * c;

	this.m[0] = m11;
	this.m[1] = m12;
	this.m[2] = m21;
	this.m[3] = m22;
};

/**
 * Apply scale to this matrix.
 */
Matrix.prototype.scale = function(sx, sy)
{
	this.m[0] *= sx;
	this.m[1] *= sx;
	this.m[2] *= sy;
	this.m[3] *= sy;
};

/**
 * Set the position of the transformation matrix.
 */
Matrix.prototype.setPosition = function(x, y)
{
	this.m[4] = x;
	this.m[5] = y;
};

/**
 * Get the scale from the transformation matrix.
 */
Matrix.prototype.getScale = function()
{
	return new Vector2(this.m[0], this.m[3]);
};

/**
 * Get the position from the transformation matrix.
 */
Matrix.prototype.getPosition = function()
{
	return new Vector2(this.m[4], this.m[5]);
};

/**
 * Apply skew to this matrix.
 */
Matrix.prototype.skew = function(radianX, radianY)
{
	this.multiply(new Matrix([1, Math.tan(radianY), Math.tan(radianX), 1, 0, 0]));
};

/**
 * Get the matrix determinant.
 */
Matrix.prototype.determinant = function()
{
	return 1 / (this.m[0] * this.m[3] - this.m[1] * this.m[2]);
};

/**
 * Get the inverse matrix.
 */
Matrix.prototype.getInverse = function()
{
	var d = this.determinant();

	return new Matrix([this.m[3] * d, -this.m[1] * d, -this.m[2] * d, this.m[0] * d, d * (this.m[2] * this.m[5] - this.m[3] * this.m[4]), d * (this.m[1] * this.m[4] - this.m[0] * this.m[5])]);
};

/**
 * Transform a point using this matrix.
 */
Matrix.prototype.transformPoint = function(p)
{
	var px = p.x * this.m[0] + p.y * this.m[2] + this.m[4];
	var py = p.x * this.m[1] + p.y * this.m[3] + this.m[5];

	return new Vector2(px, py);
};

/**
 * Set a canvas context to use this transformation.
 */
Matrix.prototype.setContextTransform = function(context)
{
	context.setTransform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
};

/**
 * Transform on top of the current context transformation.
 */
Matrix.prototype.tranformContext = function(context)
{
	context.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
};

Matrix.prototype.cssTransform = function()
{
	return "matrix(" + this.m[0] + "," + this.m[1] + "," + this.m[2] + "," + this.m[3] + "," + this.m[4] + "," + this.m[5] + ")";
};

export {Matrix};
</code></pre>
        </article>
    </section>


</div>

<nav>
    <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="BezierCurve.html">BezierCurve</a></li><li><a href="Box.html">Box</a></li><li><a href="Box2.html">Box2</a></li><li><a href="BoxMask.html">BoxMask</a></li><li><a href="Circle.html">Circle</a></li><li><a href="DOM.html">DOM</a></li><li><a href="EventManager.html">EventManager</a></li><li><a href="Graph.html">Graph</a></li><li><a href="Helpers.html">Helpers</a></li><li><a href="Image.html">Image</a></li><li><a href="Key.html">Key</a></li><li><a href="Line.html">Line</a></li><li><a href="Mask.html">Mask</a></li><li><a href="Matrix.html">Matrix</a></li><li><a href="Object2D.html">Object2D</a></li><li><a href="Pattern.html">Pattern</a></li><li><a href="Pointer.html">Pointer</a></li><li><a href="Renderer.html">Renderer</a></li><li><a href="Text.html">Text</a></li><li><a href="UUID.html">UUID</a></li><li><a href="Vector2.html">Vector2</a></li><li><a href="Viewport.html">Viewport</a></li><li><a href="ViewportControls.html">ViewportControls</a></li></ul>
</nav>

<br class="clear">

<footer>
    Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.2</a> on Thu Jun 13 2019 09:46:06 GMT+0100 (Western European Summer Time)
</footer>

<script> prettyPrint(); </script>
<script src="scripts/linenumber.js"> </script>
</body>
</html>