847eb6c48e
Fixed issue where alpha not being set correctly in canvas spriteBatch Fixed issue where previous stage events did not get removed correctly
289 lines
9.5 KiB
HTML
289 lines
9.5 KiB
HTML
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<h1 class="file-heading">File: src/pixi/core/Ellipse.js</h1>
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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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* The Ellipse object can be used to specify a hit area for displayObjects
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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 ellipse
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* @param y {Number} The Y coord of the upper-left corner of the framing rectangle of this ellipse
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* @param width {Number} The overall width of this ellipse
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* @param height {Number} The overall height 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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* Creates a clone of this Ellipse instance
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*
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* @method clone
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* @return {Ellipse} a copy of the ellipse
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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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* Checks if the x and y coords passed to this function are contained within this ellipse
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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 {Boolean} if the x/y coords are within this ellipse
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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.prototype.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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// constructor
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PIXI.Ellipse.prototype.constructor = PIXI.Ellipse;
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</pre>
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