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A JavaScript 2D physics engine.

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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>WheelConstraint - p2.js</title> <link rel="stylesheet" href="http://yui.yahooapis.com/3.9.1/build/cssgrids/cssgrids-min.css"> <link rel="stylesheet" href="../assets/vendor/prettify/prettify-min.css"> <link rel="stylesheet" href="../assets/css/main.css" id="site_styles"> <link rel="icon" href="../assets/favicon.ico"> <script src="http://yui.yahooapis.com/combo?3.9.1/build/yui/yui-min.js"></script> </head> <body class="yui3-skin-sam"> <div id="doc"> <div id="hd" class="yui3-g header"> <div class="yui3-u-3-4"> <h1><img src="../assets/css/logo.png" title="p2.js" width="117" height="52"></h1> </div> <div class="yui3-u-1-4 version"> <em>API Docs for: 0.7.1</em> </div> </div> <div id="bd" class="yui3-g"> <div class="yui3-u-1-4"> <div id="docs-sidebar" class="sidebar apidocs"> <div id="api-list"> <h2 class="off-left">APIs</h2> <div id="api-tabview" class="tabview"> <ul class="tabs"> <li><a 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</label> </div> <div class="apidocs"> <div id="docs-main"> <div class="content"> <h1>WheelConstraint Class</h1> <div class="box meta"> <div class="extends"> Extends <a href="../classes/Constraint.html" class="crosslink">Constraint</a> </div> <div class="foundat"> Defined in: <a href="../files/src_objects_TopDownVehicle.js.html#l121"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:121</code></a> </div> </div> <div class="box intro"> </div> <div class="constructor"> <h2>Constructor</h2> <div id="method_WheelConstraint" class="method item"> <h3 class="name"><code>WheelConstraint</code></h3> <div class="args"> <span class="paren">(</span><ul class="args-list inline commas"> <li class="arg"> <code>vehicle</code> </li> <li class="arg"> <code class="optional">[options]</code> </li> </ul><span class="paren">)</span> </div> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l121"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:121</code></a> </p> </div> <div class="description"> </div> <div class="params"> <h4>Parameters:</h4> <ul class="params-list"> <li class="param"> <code class="param-name">vehicle</code> <span class="type">Vehicle</span> <div class="param-description"> </div> </li> <li class="param"> <code class="param-name optional">[options]</code> <span class="type">Object</span> <span class="flag optional" title="This parameter is optional.">optional</span> <div class="param-description"> </div> <ul class="params-list"> <li class="param"> <code class="param-name optional">[localForwardVector]</code> <span class="type">Array</span> <span class="flag optional" title="This parameter is optional.">optional</span> <div class="param-description"> <p>The local wheel forward vector in local body space. Default is zero.</p> </div> </li> <li class="param"> <code class="param-name optional">[localPosition]</code> <span class="type">Array</span> <span class="flag optional" title="This parameter is optional.">optional</span> <div class="param-description"> <p>The local position of the wheen in the chassis body. Default is zero - the center of the body.</p> </div> </li> <li class="param"> <code class="param-name optional">[sideFriction=5]</code> <span class="type">Array</span> <span class="flag optional" title="This parameter is optional.">optional</span> <div class="param-description"> <p>The max friction force in the sideways direction.</p> </div> </li> </ul> </li> </ul> </div> </div> </div> <div id="classdocs" class="tabview"> <ul class="api-class-tabs"> <li class="api-class-tab index"><a href="#index">Index</a></li> <li class="api-class-tab methods"><a href="#methods">Methods</a></li> <li class="api-class-tab properties"><a href="#properties">Properties</a></li> </ul> <div> <div id="index" class="api-class-tabpanel index"> <h2 class="off-left">Item Index</h2> <div class="index-section methods"> <h3>Methods</h3> <ul class="index-list methods extends"> <li class="index-item method"> <a href="#method_getSpeed">getSpeed</a> </li> <li class="index-item method"> <a href="#method_setForwardFriction">setForwardFriction</a> </li> <li class="index-item method"> <a href="#method_setSideFriction">setSideFriction</a> </li> <li class="index-item method"> <a href="#method_update">update</a> </li> </ul> </div> <div class="index-section properties"> <h3>Properties</h3> <ul class="index-list properties extends"> <li class="index-item property"> <a href="#property_engineForce">engineForce</a> </li> <li class="index-item property"> <a href="#property_localForwardVector">localForwardVector</a> </li> <li class="index-item property"> <a href="#property_localPosition">localPosition</a> </li> <li class="index-item property"> <a href="#property_steerValue">steerValue</a> </li> </ul> </div> </div> <div id="methods" class="api-class-tabpanel"> <h2 class="off-left">Methods</h2> <div id="method_getSpeed" class="method item"> <h3 class="name"><code>getSpeed</code></h3> <span class="paren">()</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l196"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:196</code></a> </p> </div> <div class="description"> </div> </div> <div id="method_setForwardFriction" class="method item"> <h3 class="name"><code>setForwardFriction</code></h3> <span class="paren">()</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l179"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:179</code></a> </p> </div> <div class="description"> </div> </div> <div id="method_setSideFriction" class="method item"> <h3 class="name"><code>setSideFriction</code></h3> <span class="paren">()</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l186"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:186</code></a> </p> </div> <div class="description"> </div> </div> <div id="method_update" class="method item"> <h3 class="name"><code>update</code></h3> <span class="paren">()</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l207"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:207</code></a> </p> </div> <div class="description"> </div> </div> </div> <div id="properties" class="api-class-tabpanel"> <h2 class="off-left">Properties</h2> <div id="property_engineForce" class="property item"> <h3 class="name"><code>engineForce</code></h3> <span class="type">Number</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l145"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:145</code></a> </p> </div> <div class="description"> </div> </div> <div id="property_localForwardVector" class="property item"> <h3 class="name"><code>localForwardVector</code></h3> <span class="type">Array</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l152"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:152</code></a> </p> </div> <div class="description"> </div> </div> <div id="property_localPosition" class="property item"> <h3 class="name"><code>localPosition</code></h3> <span class="type">Array</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l160"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:160</code></a> </p> </div> <div class="description"> </div> </div> <div id="property_steerValue" class="property item"> <h3 class="name"><code>steerValue</code></h3> <span class="type">Number</span> <div class="meta"> <p> Defined in <a href="../files/src_objects_TopDownVehicle.js.html#l140"><code>src&#x2F;objects&#x2F;TopDownVehicle.js:140</code></a> </p> </div> <div class="description"> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <script src="../assets/vendor/prettify/prettify-min.js"></script> <script>prettyPrint();</script> <script src="../assets/js/yui-prettify.js"></script> <script src="../assets/../api.js"></script> <script src="../assets/js/api-filter.js"></script> <script 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