javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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		[page:Object3D] &rarr;

		<h1>[name]</h1>

		<div class="desc">
			Helper object to assist with visualizing a [page:DirectionalLight]'s effect on the scene.

			This consists of plane and a line representing the light's position and direction.
		</div>

		<h2>Example</h2>

		<code>
		var light = new THREE.DirectionalLight( 0xFFFFFF );

		var helper = new THREE.DirectionalLightHelper( light, 5 );

		scene.add( helper );
		</code>


		<h2>Constructor</h2>


		<h3>[name]( [page:DirectionalLight light], [page:Number size] )</h3>
		<div>
		[page:DirectionalLight light]-- The light to be visualized. <br />
		[page:Number size] -- (optional) dimensions of the plane. Default is *1*.<br /><br />
		</div>


		<h2>Properties</h2>
		<div>See the base [page:Object3D] class for common properties.</div>


		<h3>[property:Line lightPlane]</h3>
		<div>Contains the line mesh showing the location of the directional light.</div>

		<h3>[property:DirectionalLight light]</h3>
		<div>Reference to the [page:DirectionalLight directionalLight] being visualized.</div>

		<h3>[property:object matrix]</h3>
		<div>Reference to the light's [page:Object3D.matrixWorld matrixWorld].</div>

		<h3>[property:object matrixAutoUpdate]</h3>
		<div>
			See [page:Object3D.matrixAutoUpdate]. Set to *false* here as the helper is using the
			light's [page:Object3D.matrixWorld matrixWorld].
		</div>


		<h2>Methods</h2>
		<div>See the base [page:Object3D] class for common properties.</div>

		<h3>[method:null dispose]()</h3>
		<div>Dispose of the directionalLightHelper.</div>


		<h3>[method:null update]()</h3>
		<div>Updates the helper to match the position and direction of the [page:.light directionalLight] being visualized.</div>

		<h2>Source</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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