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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: Box2dDistanceJoint</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="Box2dDistanceJoint-title" class="has-anchor"><span class="ancestors"><a href="Box2D.html">Box2D</a>.</span> Box2dDistanceJoint</h1><div class="class-description"><p>Box2D Distance Joint</p><ul><li>Constrains two points on two objects to remain at a fixed distance</li><li>You can view this as a massless, rigid rod</li></ul></div></header><article><div class="container-overview"><h2 id="constructor" class="has-anchor">Constructor</h2><h3 class="name has-anchor" id="Box2dDistanceJoint"><span class="type-signature"></span>new Box2dDistanceJoint<span class="signature">(objectA, objectB, anchorA, anchorB, collide<span class="signature-attributes">opt</span>)</span></h3><div class="description"><p>Create a distance 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>Attributes</th><th>Default</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="attributes"></td><td class="default"></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="attributes"></td><td class="default"></td><td class="description last"></td></tr><tr><td class="name"><code>anchorA</code></td><td class="type"><span class="param-type">Vector2</span></td><td class="attributes"></td><td class="default"></td><td class="description last"></td></tr><tr><td class="name"><code>anchorB</code></td><td class="type"><span class="param-type">Vector2</span></td><td class="attributes"></td><td class="default"></td><td class="description last"></td></tr><tr><td class="name"><code>collide</code></td><td class="type"><span class="param-type">boolean</span></td><td class="attributes"><optional><br></td><td class="default">false</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#line862">line 862</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="getDampingRatio"><span class="type-signature"></span>getDampingRatio<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the damping ratio</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#line916">line 916</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="getFrequency"><span class="type-signature"></span>getFrequency<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the frequency in Hertz</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#line908">line 908</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="getLength"><span class="type-signature"></span>getLength<span class="signature">()</span><span class="type-signature"> → {number}</span></h3><div class="description"><p>Get the length of the joint</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#line900">line 900</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="getLocalAnchorA"><span class="type-signature"></span>getLocalAnchorA<span class="signature">()</span><span class="type-signature"> → {Vector2}</span></h3><div class="description"><p>Get the local anchor point relative to objectA's origin</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#line888">line 888</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="getLocalAnchorB"><span class="type-signature"></span>getLocalAnchorB<span class="signature">()</span><span class="type-signature"> → {Vector2}</span></h3><div class="description"><p>Get the local anchor point relative to objectB's origin</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#line892">line 892</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="setDampingRatio"><span class="type-signature"></span>setDampingRatio<span class="signature">(ratio)</span></h3><div class="description"><p>Set the damping ratio</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>ratio</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#line912">line 912</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setFrequency"><span class="type-signature"></span>setFrequency<span class="signature">(hz)</span></h3><div class="description"><p>Set the frequency in Hertz</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>hz</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#line904">line 904</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setLength"><span class="type-signature"></span>setLength<span class="signature">(length)</span></h3><div class="description"><p>Set the length of the 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>length</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#line896">line 896</a></li></ul></dd></div></dl></article></section><footer class="footer" id="PeOAagUepe"><div class="wrapper"><a href="https://github.com/KilledByAPixel/LittleJS">LittleJS - MIT License - 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