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<h1 class="file-heading">File: src/pixi/core/Ellipse.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Chad Engler <chad@pantherdev.com>
*/
/**
* The Ellipse object can be used to specify a hit area for displayObjects
*
* @class Ellipse
* @constructor
* @param x {Number} The X coordinate of the upper-left corner of the framing rectangle of this ellipse
* @param y {Number} The Y coordinate of the upper-left corner of the framing rectangle of this ellipse
* @param width {Number} The overall width of this ellipse
* @param height {Number} The overall height of this ellipse
*/
PIXI.Ellipse = function(x, y, width, height)
{
/**
* @property x
* @type Number
* @default 0
*/
this.x = x || 0;
/**
* @property y
* @type Number
* @default 0
*/
this.y = y || 0;
/**
* @property width
* @type Number
* @default 0
*/
this.width = width || 0;
/**
* @property height
* @type Number
* @default 0
*/
this.height = height || 0;
};
/**
* Creates a clone of this Ellipse instance
*
* @method clone
* @return {Ellipse} a copy of the ellipse
*/
PIXI.Ellipse.prototype.clone = function()
{
return new PIXI.Ellipse(this.x, this.y, this.width, this.height);
};
/**
* Checks whether the x and y coordinates passed to this function are contained within this ellipse
*
* @method contains
* @param x {Number} The X coordinate of the point to test
* @param y {Number} The Y coordinate of the point to test
* @return {Boolean} Whether the x/y coords are within this ellipse
*/
PIXI.Ellipse.prototype.contains = function(x, y)
{
if(this.width <= 0 || this.height <= 0)
return false;
//normalize the coords to an ellipse with center 0,0
var normx = ((x - this.x) / this.width),
normy = ((y - this.y) / this.height);
normx *= normx;
normy *= normy;
return (normx + normy <= 1);
};
/**
* Returns the framing rectangle of the ellipse as a PIXI.Rectangle object
*
* @method getBounds
* @return {Rectangle} the framing rectangle
*/
PIXI.Ellipse.prototype.getBounds = function()
{
return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
};
// constructor
PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
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