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Mat Groves 2013-07-02 10:48:05 +01:00
parent b1b2e417a3
commit 69b3be322e
93 changed files with 6214 additions and 1190 deletions
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44
docs/files/src_pixi_core_Polygon.js.html
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@ -53,12 +53,16 @@
<li><a href="..&#x2F;classes/CanvasRenderer.html">CanvasRenderer</a></li>
<li><a href="..&#x2F;classes/Circle.html">Circle</a></li>
<li><a href="..&#x2F;classes/CustomRenderable.html">CustomRenderable</a></li>
<li><a href="..&#x2F;classes/DisplayObject.html">DisplayObject</a></li>
<li><a href="..&#x2F;classes/DisplayObjectContainer.html">DisplayObjectContainer</a></li>
<li><a href="..&#x2F;classes/Ellipse.html">Ellipse</a></li>
<li><a href="..&#x2F;classes/Graphics.html">Graphics</a></li>
<li><a href="..&#x2F;classes/ImageLoader.html">ImageLoader</a></li>
@ -149,10 +153,23 @@
&#x2F;**
* @class Polygon
* @constructor
* @param points {Array}
* @param points {Array&lt;Point&gt;|Array&lt;Number&gt;} This cna be an array of Points or a flat array of numbers
* that will be interpreted as [x,y, x,y, ...]
*&#x2F;
PIXI.Polygon = function(points)
{
&#x2F;&#x2F;if this is a flat array of numbers, convert it to points
if(typeof points[0] === &#x27;number&#x27;) {
var p = [];
for(var i = 0, il = points.length; i &lt; il; i+=2) {
p.push(
new PIXI.Point(points[i], points[i + 1])
);
}
points = p;
}
this.points = points;
}
@ -160,7 +177,7 @@ PIXI.Polygon = function(points)
* @method clone
* @return a copy of the polygon
*&#x2F;
PIXI.Polygon.clone = function()
PIXI.Polygon.prototype.clone = function()
{
var points = [];
for (var i=0; i&lt;this.points.length; i++) {
@ -170,6 +187,29 @@ PIXI.Polygon.clone = function()
return new PIXI.Polygon(points);
}
&#x2F;**
* @method contains
* @param x {Number} The X coord of the point to test
* @param y {Number} The Y coord of the point to test
* @return if the x&#x2F;y coords are within this polygon
*&#x2F;
PIXI.Polygon.prototype.contains = function(x, y)
{
var inside = false;
&#x2F;&#x2F; use some raycasting to test hits
&#x2F;&#x2F; https:&#x2F;&#x2F;github.com&#x2F;substack&#x2F;point-in-polygon&#x2F;blob&#x2F;master&#x2F;index.js
for(var i = 0, j = this.points.length - 1; i &lt; this.points.length; j = i++) {
var xi = this.points[i].x, yi = this.points[i].y,
xj = this.points[j].x, yj = this.points[j].y,
intersect = ((yi &gt; y) != (yj &gt; y)) &amp;&amp; (x &lt; (xj - xi) * (y - yi) &#x2F; (yj - yi) + xi);
if(intersect) inside = !inside;
}
return inside;
}
PIXI.Polygon.constructor = PIXI.Polygon;