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Updated docs for 2.0 release and updated README.
2014-03-14 06:36:05 +00:00
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<title>Phaser Class: QuadTree</title>
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<div class="row-fluid">
<div class="span8">
<div id="main">
<h1 class="page-title">Class: QuadTree</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="Phaser.html">Phaser</a>.</span>
QuadTree
</h2>
<div class="class-description"><p>A QuadTree implementation. The original code was a conversion of the Java code posted to GameDevTuts.
However I've tweaked it massively to add node indexing, removed lots of temp. var creation and significantly increased performance as a result.
Original version at <a href="https://github.com/timohausmann/quadtree-js/">https://github.com/timohausmann/quadtree-js/</a></p></div>
</header>
<article>
<div class="container-overview">
<dt>
<h4 class="name" id="QuadTree"><span class="type-signature"></span>new QuadTree<span class="signature">(x, y, width, height, <span class="optional">maxObjects</span>, <span class="optional">maxLevels</span>, <span class="optional">level</span>)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>QuadTree Constructor</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Argument</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>x</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The top left coordinate of the quadtree.</p></td>
</tr>
<tr>
<td class="name"><code>y</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The top left coordinate of the quadtree.</p></td>
</tr>
<tr>
<td class="name"><code>width</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The width of the quadtree in pixels.</p></td>
</tr>
<tr>
<td class="name"><code>height</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The height of the quadtree in pixels.</p></td>
</tr>
<tr>
<td class="name"><code>maxObjects</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="default">
10
</td>
<td class="description last"><p>The maximum number of objects per node.</p></td>
</tr>
<tr>
<td class="name"><code>maxLevels</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="default">
4
</td>
<td class="description last"><p>The maximum number of levels to iterate to.</p></td>
</tr>
<tr>
<td class="name"><code>level</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="default">
0
</td>
<td class="description last"><p>Which level is this?</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-60">line 60</a>
</li></ul></dd>
</dl>
</dd>
</div>
<h3 class="subsection-title">Members</h3>
<dl>
<dt>
<h4 class="name" id="bounds"><span class="type-signature"></span>bounds<span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<h5 class="subsection-title">Properties:</h5>
<dl>
<table class="props table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>bounds</code></td>
<td class="type">
<span class="param-type">object</span>
</td>
<td class="description last"><p>Object that contains the quadtree bounds.</p></td>
</tr>
</tbody>
</table>
</dl>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-82">line 82</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="level"><span class="type-signature"></span>level<span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<h5 class="subsection-title">Properties:</h5>
<dl>
<table class="props table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>level</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The current level.</p></td>
</tr>
</tbody>
</table>
</dl>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-77">line 77</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="maxLevels"><span class="type-signature"></span>maxLevels<span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<h5 class="subsection-title">Properties:</h5>
<dl>
<table class="props table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>maxLevels</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The maximum number of levels to break down to.</p></td>
</tr>
</tbody>
</table>
</dl>
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy"><li>4</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-72">line 72</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="maxObjects"><span class="type-signature"></span>maxObjects<span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<h5 class="subsection-title">Properties:</h5>
<dl>
<table class="props table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>maxObjects</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The maximum number of objects per node.</p></td>
</tr>
</tbody>
</table>
</dl>
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy"><li>10</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-66">line 66</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="nodes"><span class="type-signature"></span>nodes<span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<h5 class="subsection-title">Properties:</h5>
<dl>
<table class="props table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>nodes</code></td>
<td class="type">
<span class="param-type">array</span>
</td>
<td class="description last"><p>Array of associated child nodes.</p></td>
</tr>
</tbody>
</table>
</dl>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-92">line 92</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="objects"><span class="type-signature"></span>objects<span class="type-signature"></span></h4>
</dt>
<dd>
<dl class="details">
<h5 class="subsection-title">Properties:</h5>
<dl>
<table class="props table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>objects</code></td>
<td class="type">
<span class="param-type">array</span>
</td>
<td class="description last"><p>Array of quadtree children.</p></td>
</tr>
</tbody>
</table>
</dl>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-87">line 87</a>
</li></ul></dd>
</dl>
</dd>
</dl>
<h3 class="subsection-title">Methods</h3>
<dl>
<dt>
<h4 class="name" id="clear"><span class="type-signature"></span>clear<span class="signature">()</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>Clear the quadtree.</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-315">line 315</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="getIndex"><span class="type-signature"></span>getIndex<span class="signature">(rect)</span><span class="type-signature"> &rarr; {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Determine which node the object belongs to.</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>rect</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Rectangle.html">Phaser.Rectangle</a></span>
|
<span class="param-type">object</span>
</td>
<td class="description last"><p>The bounds in which to check.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-236">line 236</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
<p>index - Index of the subnode (0-3), or -1 if rect cannot completely fit within a subnode and is part of the parent node.</p>
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="insert"><span class="type-signature"></span>insert<span class="signature">(body)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>Insert the object into the node. If the node exceeds the capacity, it will split and add all objects to their corresponding subnodes.</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>body</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Physics.Arcade.Body.html">Phaser.Physics.Arcade.Body</a></span>
|
<span class="param-type">object</span>
</td>
<td class="description last"><p>The Body object to insert into the quadtree. Can be any object so long as it exposes x, y, right and bottom properties.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-184">line 184</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="populate"><span class="type-signature"></span>populate<span class="signature">(group)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>Populates this quadtree with the children of the given Group. In order to be added the child must exist and have a body property.</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>group</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Group.html">Phaser.Group</a></span>
</td>
<td class="description last"><p>The Group to add to the quadtree.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-134">line 134</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="populateHandler"><span class="type-signature"></span>populateHandler<span class="signature">(sprite)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>Handler for the populate method.</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>sprite</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Sprite.html">Phaser.Sprite</a></span>
|
<span class="param-type">object</span>
</td>
<td class="description last"><p>The Sprite to check.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-146">line 146</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="reset"><span class="type-signature"></span>reset<span class="signature">(x, y, width, height, <span class="optional">maxObjects</span>, <span class="optional">maxLevels</span>, <span class="optional">level</span>)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>Resets the QuadTree.</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Argument</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>x</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The top left coordinate of the quadtree.</p></td>
</tr>
<tr>
<td class="name"><code>y</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The top left coordinate of the quadtree.</p></td>
</tr>
<tr>
<td class="name"><code>width</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The width of the quadtree in pixels.</p></td>
</tr>
<tr>
<td class="name"><code>height</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
</td>
<td class="default">
</td>
<td class="description last"><p>The height of the quadtree in pixels.</p></td>
</tr>
<tr>
<td class="name"><code>maxObjects</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="default">
10
</td>
<td class="description last"><p>The maximum number of objects per node.</p></td>
</tr>
<tr>
<td class="name"><code>maxLevels</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="default">
4
</td>
<td class="description last"><p>The maximum number of levels to iterate to.</p></td>
</tr>
<tr>
<td class="name"><code>level</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="attributes">
&lt;optional><br>
</td>
<td class="default">
0
</td>
<td class="description last"><p>Which level is this?</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-100">line 100</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="retrieve"><span class="type-signature"></span>retrieve<span class="signature">(sprite)</span><span class="type-signature"> &rarr; {array}</span></h4>
</dt>
<dd>
<div class="description">
<p>Return all objects that could collide with the given Sprite.</p>
</div>
<h5>Parameters:</h5>
<table class="params table table-striped">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>sprite</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Sprite.html">Phaser.Sprite</a></span>
</td>
<td class="description last"><p>The sprite to check against.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-280">line 280</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
<ul>
<li>Array with all detected objects.</li>
</ul>
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">array</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="split"><span class="type-signature"></span>split<span class="signature">()</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>Split the node into 4 subnodes</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="QuadTree.js.html">math/QuadTree.js</a>, <a href="QuadTree.js.html#sunlight-1-line-161">line 161</a>
</li></ul></dd>
</dl>
</dd>
</dl>
</article>
</section>
</div>
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<footer>
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Phaser Copyright © 2012-2014 Photon Storm Ltd.
</span>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-dev</a>
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