249 lines
8 KiB
HTML
249 lines
8 KiB
HTML
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<title>src/pixi/core/Ellipse.js - Pixi.JS</title>
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<h1 class="file-heading">File: src/pixi/core/Ellipse.js</h1>
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<div class="file">
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<pre class="code prettyprint linenums">
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/**
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* @author Chad Engler <chad@pantherdev.com>
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*/
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/**
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* @class Ellipse
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* @constructor
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* @param x {Number} The X coord of the upper-left corner of the framing rectangle of this circle
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* @param y {Number} The Y coord of the upper-left corner of the framing rectangle of this circle
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* @param width {Number} The overall height of this ellipse
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* @param height {Number} The overall width of this ellipse
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*/
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PIXI.Ellipse = function(x, y, width, height)
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{
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/**
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* @property x
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* @type Number
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* @default 0
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*/
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this.x = x || 0;
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/**
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* @property y
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* @type Number
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* @default 0
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*/
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this.y = y || 0;
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/**
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* @property width
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* @type Number
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* @default 0
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*/
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this.width = width || 0;
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/**
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* @property height
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* @type Number
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* @default 0
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*/
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this.height = height || 0;
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}
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/**
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* @method clone
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* @return a copy of the polygon
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*/
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PIXI.Ellipse.prototype.clone = function()
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{
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return new PIXI.Ellipse(this.x, this.y, this.width, this.height);
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}
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/**
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* @method contains
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* @param x {Number} The X coord of the point to test
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* @param y {Number} The Y coord of the point to test
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* @return if the x/y coords are within this polygon
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*/
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PIXI.Ellipse.prototype.contains = function(x, y)
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{
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if(this.width <= 0 || this.height <= 0)
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return false;
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//normalize the coords to an ellipse with center 0,0
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//and a radius of 0.5
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var normx = ((x - this.x) / this.width) - 0.5,
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normy = ((y - this.y) / this.height) - 0.5;
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normx *= normx;
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normy *= normy;
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return (normx + normy < 0.25);
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}
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PIXI.Ellipse.getBounds = function()
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{
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return new PIXI.Rectangle(this.x, this.y, this.width, this.height);
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}
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PIXI.Ellipse.constructor = PIXI.Ellipse;
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</pre>
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