phaser
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A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers.
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<div class="span8">
<div id="main">
<h1 class="page-title">Class: Math</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="Phaser.html">Phaser</a>.</span>
Math
</h2>
</header>
<article>
<div class="container-overview">
<dt>
<h4 class="name" id="Math"><span class="type-signature"></span>new Math<span class="signature">()</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
<p>A collection of mathematical methods.</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-3">line 3</a>
</li></ul></dd>
</dl>
</dd>
</div>
<h3 class="subsection-title">Methods</h3>
<dl>
<dt>
<h4 class="name" id="angleBetween"><span class="type-signature"></span>angleBetween<span class="signature">(x1, y1, x2, y2)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Find the angle of a segment from (x1, y1) -> (x2, y2).</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>x1</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>y1</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>x2</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>y2</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-329">line 329</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="angleBetweenPoints"><span class="type-signature"></span>angleBetweenPoints<span class="signature">(point1, point2)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Find the angle of a segment from (point1.x, point1.y) -> (point2.x, point2.y).</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>point1</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Point.html">Phaser.Point</a></span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>point2</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Point.html">Phaser.Point</a></span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-358">line 358</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="angleBetweenPointsY"><span class="type-signature"></span>angleBetweenPointsY<span class="signature">(point1, point2)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Find the angle of a segment from (point1.x, point1.y) -> (point2.x, point2.y).</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>point1</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Point.html">Phaser.Point</a></span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>point2</code></td>
<td class="type">
<span class="param-type"><a href="Phaser.Point.html">Phaser.Point</a></span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-369">line 369</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="angleBetweenY"><span class="type-signature"></span>angleBetweenY<span class="signature">(x1, y1, x2, y2)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Find the angle of a segment from (x1, y1) -> (x2, y2).
Note that the difference between this method and Math.angleBetween is that this assumes the y coordinate travels
down the screen.</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>x1</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>y1</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>x2</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>y2</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-342">line 342</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="angleLimit"><span class="type-signature"></span>angleLimit<span class="signature">(angle, min, max)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Keeps an angle value between the given min and max values.</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>angle</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The angle value to check. Must be between -180 and +180.</p></td>
</tr>
<tr>
<td class="name"><code>min</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The minimum angle that is allowed (must be -180 or greater).</p></td>
</tr>
<tr>
<td class="name"><code>max</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The maximum angle that is allowed (must be 180 or less).</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-902">line 902</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
<p>The new angle value, returns the same as the input angle if it was within bounds</p>
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="average"><span class="type-signature"></span>average<span class="signature">()</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Averages all values passed to the function and returns the result. You can pass as many parameters as you like.</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-81">line 81</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
<p>The average of all given values.</p>
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="bernstein"><span class="type-signature"></span>bernstein<span class="signature">(n, i)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<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>n</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>i</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-1028">line 1028</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="bezierInterpolation"><span class="type-signature"></span>bezierInterpolation<span class="signature">(v, k)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>A Bezier Interpolation Method, mostly used by Phaser.Tween.</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>v</code></td>
<td class="type">
<span class="param-type"><a href="Array.html">Array</a></span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>k</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-955">line 955</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="catmullRom"><span class="type-signature"></span>catmullRom<span class="signature">(p0, p1, p2, p3, t)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Description.</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>p0</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>p1</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>p2</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>p3</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>t</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-1060">line 1060</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="catmullRomInterpolation"><span class="type-signature"></span>catmullRomInterpolation<span class="signature">(v, k)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>A Catmull Rom Interpolation Method, mostly used by Phaser.Tween.</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>v</code></td>
<td class="type">
<span class="param-type"><a href="Array.html">Array</a></span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>k</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-976">line 976</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="ceil"><span class="type-signature"></span>ceil<span class="signature">(value)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Round up to the next whole number. E.g. ceil(1.3) == 2, and ceil(-2.3) == -3.</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>value</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>Any number.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-1173">line 1173</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
<p>The rounded value of that number.</p>
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="ceilTo"><span class="type-signature"></span>ceilTo<span class="signature">(value, place, base)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<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>value</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The value to round.</p></td>
</tr>
<tr>
<td class="name"><code>place</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The place to round to.</p></td>
</tr>
<tr>
<td class="name"><code>base</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The base to round in... default is 10 for decimal.</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-299">line 299</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="chanceRoll"><span class="type-signature"></span>chanceRoll<span class="signature">(chance)</span><span class="type-signature"> → {boolean}</span></h4>
</dt>
<dd>
<div class="description">
<p>Generate a random bool result based on the chance value.</p>
<p><p>
Returns true or false based on the chance value (default 50%). For example if you wanted a player to have a 30% chance
of getting a bonus, call chanceRoll(30) - true means the chance passed, false means it failed.
</p></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>chance</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"><p>The chance of receiving the value. A number between 0 and 100 (effectively 0% to 100%).</p></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-435">line 435</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
<p>True if the roll passed, or false otherwise.</p>
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">boolean</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="clamp"><span class="type-signature"></span>clamp<span class="signature">(x, a, b)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Force a value within the boundaries of two values.
Clamp value to range <a, b></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>x</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>a</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>b</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-1316">line 1316</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="clampBottom"><span class="type-signature"></span>clampBottom<span class="signature">(x, a)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<div class="description">
<p>Clamp value to range <a, inf).</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>x</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
<tr>
<td class="name"><code>a</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last"></td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-1332">line 1332</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">number</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="degToRad"><span class="type-signature"></span>degToRad<span class="signature">()</span><span class="type-signature"> → {function}</span></h4>
</dt>
<dd>
<div class="description">
<p>Convert degrees to radians.</p>
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="Math.js.html">math/Math.js</a>, <a href="Math.js.html#sunlight-1-line-1452">line 1452</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">function</span>
</dd>
</dl>
</dd>
<dt>
<h4 class="name" id="difference"><span class="type-signature"></span>difference<span class="signature">(a, b)</span><span class="type-signature"> → {number}</span></h4>
</dt>
<dd>
<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>a</code></td>
<td class="type">
<span class="param-type">number</span>
</td>