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	<title>CameraHelper - Three.js Docs</title>
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		<p class="inheritance" translate="no"><a href="EventDispatcher.html">EventDispatcher</a> → <a href="Object3D.html">Object3D</a> → <a href="Line.html">Line</a> → <a href="LineSegments.html">LineSegments</a> → </p>
	<h1 translate="no">CameraHelper</h1>
		<section>
			<header>
				<div class="class-description"><p>This helps with visualizing what a camera contains in its frustum. It
visualizes the frustum of a camera using a line segments.</p>
<p>Based on frustum visualization in <a href="https://github.com/evanw/lightgl.js/blob/master/tests/shadowmap.html" target="_blank" rel="noopener">lightgl.js shadowmap example</a>.</p>
<p><code>CameraHelper</code> must be a child of the scene.</p>
<p>When the camera is transformed or its projection matrix is changed, it's necessary
to call the <code>update()</code> method of the respective helper.</p></div>
				<h2>Code Example</h2>
				<div translate="no"><pre><code class="language-js">const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
const helper = new THREE.CameraHelper( camera );
scene.add( helper );
</code></pre></div>
			</header>
			<article>
				<div class="container-overview">
					<h2>Constructor</h2>
					<h3 class="name name-method" id="CameraHelper" translate="no">new <a href="#CameraHelper">CameraHelper</a><span class="signature">( camera : <span class="param-type"><a href="Camera.html">Camera</a></span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Constructs a new arrow helper.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name">
										<strong translate="no">camera</strong>
									</td>
									<td class="description last">
										<p>The camera to visualize.</p>
									</td>
								</tr>
							</tbody>
						</table>
					</div>
				</div>
				<h2 class="subsection-title">Properties</h2>
				<div class="member">
					<h3 class="name" id="camera" translate="no">.<a href="#camera">camera</a><span class="type-signature"> : <a href="Camera.html">Camera</a></span> </h3>
					<div class="description">
						<p>The camera being visualized.</p>
					</div>
				</div>
				<div class="member">
					<h3 class="name" id="pointMap" translate="no">.<a href="#pointMap">pointMap</a><span class="type-signature"> : Object.&lt;string, Array.&lt;number>></span> </h3>
					<div class="description">
						<p>This contains the points used to visualize the camera.</p>
					</div>
				</div>
				<h2 class="subsection-title">Methods</h2>
					<h3 class="name name-method" id="dispose" translate="no">.<a href="#dispose">dispose</a><span class="signature">()</span> </h3>
					<div class="method">
						<div class="description">
							<p>Frees the GPU-related resources allocated by this instance. Call this
method whenever this instance is no longer used in your app.</p>
						</div>
					</div>
					<h3 class="name name-method" id="setColors" translate="no">.<a href="#setColors">setColors</a><span class="signature">( frustum : <span class="param-type"><a href="Color.html">Color</a></span>, cone : <span class="param-type"><a href="Color.html">Color</a></span>, up : <span class="param-type"><a href="Color.html">Color</a></span>, target : <span class="param-type"><a href="Color.html">Color</a></span>, cross : <span class="param-type"><a href="Color.html">Color</a></span> )</span><span class="type-signature"> : <a href="CameraHelper.html">CameraHelper</a></span> </h3>
					<div class="method">
						<div class="description">
							<p>Defines the colors of the helper.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name">
										<strong translate="no">frustum</strong>
									</td>
									<td class="description last">
										<p>The frustum line color.</p>
									</td>
								</tr>
								<tr>
									<td class="name">
										<strong translate="no">cone</strong>
									</td>
									<td class="description last">
										<p>The cone line color.</p>
									</td>
								</tr>
								<tr>
									<td class="name">
										<strong translate="no">up</strong>
									</td>
									<td class="description last">
										<p>The up line color.</p>
									</td>
								</tr>
								<tr>
									<td class="name">
										<strong translate="no">target</strong>
									</td>
									<td class="description last">
										<p>The target line color.</p>
									</td>
								</tr>
								<tr>
									<td class="name">
										<strong translate="no">cross</strong>
									</td>
									<td class="description last">
										<p>The cross line color.</p>
									</td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> A reference to this helper.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="update" translate="no">.<a href="#update">update</a><span class="signature">()</span> </h3>
					<div class="method">
						<div class="description">
							<p>Updates the helper based on the projection matrix of the camera.</p>
						</div>
					</div>
				<h2 class="subsection-title">Source</h2>
				<p>
					<a href="https://github.com/mrdoob/three.js/blob/master/src/helpers/CameraHelper.js" translate="no" target="_blank" rel="noopener">src/helpers/CameraHelper.js</a>
				</p>
			</article>
		</section>
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