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<!DOCTYPE html><html lang="en" style="font-size:16px"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><link rel="icon" href="./static/favicon.png"><meta name="description" content="LittleJS is a lightweight HTML5 game engine with fast WebGL rendering, physics, particles, sound, and more!"><meta name="keywords" content="javascript, game engine, html5, webgl, 2d, game development, indie games"><meta name="author" content="Frank Force"><meta property="og:title" content="LittleJS - The Tiny JavaScript Game Engine"><meta property="og:description" content="Lightweight HTML5 game engine with WebGL rendering, physics, and sound"><meta property="og:type" content="website"><title>Class: Box2dMotorJoint</title><!--[if lt IE 9]>
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id="VuAckcnZhf"><nav class="navbar"><div class="navbar-left-items"><div class="navbar-item"><a id="" href="https://github.com/KilledByAPixel/LittleJS" target="_blank">GitHub</a></div><div class="navbar-item"><a id="" href="https://killedbyapixel.github.io/LittleJS/examples/" target="_blank">Examples</a></div><div class="navbar-item"><a id="" href="https://github.com/KilledByAPixel/LittleJS/blob/main/FAQ.md" target="_blank">FAQ</a></div></div><div class="navbar-right-items"><div class="navbar-right-item"><button class="icon-button search-button" aria-label="open-search"><svg><use xlink:href="#search-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button theme-toggle" aria-label="toggle-theme"><svg><use class="theme-svg-use" xlink:href="#light-theme-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button font-size" aria-label="change-font-size"><svg><use xlink:href="#font-size-icon"></use></svg></button></div></div><nav></nav></nav></div><div class="toc-container"><div class="toc-content"><span class="bold">On this page</span><div id="eed4d2a0bfd64539bb9df78095dec881"></div></div></div><div class="body-wrapper"><div class="main-content"><div class="main-wrapper"><section><header><h1 id="Box2dMotorJoint-title" class="has-anchor"><span class="ancestors"><a href="Box2D.html">Box2D</a>.</span> Box2dMotorJoint</h1><div class="class-description"><p>Box2D Motor Joint</p><ul><li>Controls the relative motion between two objects</li><li>Typical usage is to control the movement of a object with respect to the ground</li></ul></div></header><article><div class="container-overview"><h2 id="constructor" class="has-anchor">Constructor</h2><h3 class="name has-anchor" id="Box2dMotorJoint"><span class="type-signature"></span>new Box2dMotorJoint<span class="signature">(objectA, objectB)</span></h3><div class="description"><p>Create a motor joint</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>objectA</code></td><td class="type"><span class="param-type">Box2dObject</span></td><td class="description last"></td></tr><tr><td class="name"><code>objectB</code></td><td class="type"><span class="param-type">Box2dObject</span></td><td class="description last"></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1538">line 1538</a></li></ul></dd></div></dl></div><h2 id="Extends" class="subsection-title has-anchor">Extends</h2><ul><li>Box2dJoint</li></ul><h2 id="methods" class="subsection-title has-anchor">Methods</h2><h3 class="name has-anchor" id="getAngularOffset"><span class="type-signature"></span>getAngularOffset<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the target angular offset</p></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1569">line 1569</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><dl class="param-type"><dt>Type: </dt><dd><span class="param-type">number</span></dd></dl></div><h3 class="name has-anchor" id="getCorrectionFactor"><span class="type-signature"></span>getCorrectionFactor<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the position correction factor in the range [0,1]</p></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1593">line 1593</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><dl class="param-type"><dt>Type: </dt><dd><span class="param-type">number</span></dd></dl></div><h3 class="name has-anchor" id="getLinearOffset"><span class="type-signature"></span>getLinearOffset<span class="signature">()</span><span class="type-signature"> → {Vector2}</span></h3><div class="description"><p>Get the target linear offset, in frame A, in meters.</p></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1561">line 1561</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><dl class="param-type"><dt>Type: </dt><dd><span class="param-type">Vector2</span></dd></dl></div><h3 class="name has-anchor" id="getMaxForce"><span class="type-signature"></span>getMaxForce<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the maximum friction force</p></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1577">line 1577</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><dl class="param-type"><dt>Type: </dt><dd><span class="param-type">number</span></dd></dl></div><h3 class="name has-anchor" id="getMaxTorque"><span class="type-signature"></span>getMaxTorque<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the maximum torque</p></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1585">line 1585</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><dl class="param-type"><dt>Type: </dt><dd><span class="param-type">number</span></dd></dl></div><h3 class="name has-anchor" id="setAngularOffset"><span class="type-signature"></span>setAngularOffset<span class="signature">(offset)</span></h3><div class="description"><p>Set the target angular offset</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>offset</code></td><td class="type"><span class="param-type">number</span></td><td class="description last"></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1565">line 1565</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setCorrectionFactor"><span class="type-signature"></span>setCorrectionFactor<span class="signature">(factor)</span></h3><div class="description"><p>Set the position correction factor in the range [0,1]</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>factor</code></td><td class="type"><span class="param-type">number</span></td><td class="description last"></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1589">line 1589</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setLinearOffset"><span class="type-signature"></span>setLinearOffset<span class="signature">(offset)</span></h3><div class="description"><p>Set the target linear offset, in frame A, in meters.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>offset</code></td><td class="type"><span class="param-type">Vector2</span></td><td class="description last"></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1557">line 1557</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setMaxForce"><span class="type-signature"></span>setMaxForce<span class="signature">(force)</span></h3><div class="description"><p>Set the maximum friction force</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>force</code></td><td class="type"><span class="param-type">number</span></td><td class="description last"></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1573">line 1573</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setMaxTorque"><span class="type-signature"></span>setMaxTorque<span class="signature">(torque)</span></h3><div class="description"><p>Set the maximum torque</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>torque</code></td><td class="type"><span class="param-type">number</span></td><td class="description last"></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="plugins_box2d.js.html">plugins/box2d.js</a>, <a href="plugins_box2d.js.html#line1581">line 1581</a></li></ul></dd></div></dl></article></section><footer class="footer" id="PeOAagUepe"><div class="wrapper"><a 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