javascript
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three.js
spegling av https://github.com/tazdij/three.js.git


			
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		[page:LightShadow] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			This is used internally by [page:SpotLight SpotLights] for calculating shadows.
		</p>

		<h2>Code Example</h2>
		<code>
		//Create a WebGLRenderer and turn on shadows in the renderer
		const renderer = new THREE.WebGLRenderer();
		renderer.shadowMap.enabled = true;
		renderer.shadowMap.type = THREE.PCFSoftShadowMap; // default THREE.PCFShadowMap

		//Create a SpotLight and turn on shadows for the light
		const light = new THREE.SpotLight( 0xffffff );
		light.castShadow = true; // default false
		scene.add( light );

		//Set up shadow properties for the light
		light.shadow.mapSize.width = 512; // default
		light.shadow.mapSize.height = 512; // default
		light.shadow.camera.near = 0.5; // default
		light.shadow.camera.far = 500; // default
		light.shadow.focus = 1; // default

		//Create a sphere that cast shadows (but does not receive them)
		const sphereGeometry = new THREE.SphereGeometry( 5, 32, 32 );
		const sphereMaterial = new THREE.MeshStandardMaterial( { color: 0xff0000 } );
		const sphere = new THREE.Mesh( sphereGeometry, sphereMaterial );
		sphere.castShadow = true; //default is false
		sphere.receiveShadow = false; //default
		scene.add( sphere );

		//Create a plane that receives shadows (but does not cast them)
		const planeGeometry = new THREE.PlaneGeometry( 20, 20, 32, 32 );
		const planeMaterial = new THREE.MeshStandardMaterial( { color: 0x00ff00 } )
		const plane = new THREE.Mesh( planeGeometry, planeMaterial );
		plane.receiveShadow = true;
		scene.add( plane );

		//Create a helper for the shadow camera (optional)
		const helper = new THREE.CameraHelper( light.shadow.camera );
		scene.add( helper );
		</code>

		<h2>Constructor</h2>

		<p>The constructor creates a [param:PerspectiveCamera PerspectiveCamera] to manage the shadow's view of the world.</p>

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


		<h3>[property:Camera camera]</h3>
		<p>
			The light's view of the world. This is used to generate a depth map of the scene; objects behind
			other objects from the light's perspective will be in shadow.<br /><br />

			The default is a [page:PerspectiveCamera] with [page:PerspectiveCamera.near near] clipping plane at `0.5`.
			The [page:PerspectiveCamera.fov fov] will track the [page:SpotLight.angle angle] property of the owning
			[page:SpotLight SpotLight] via the [page:SpotLightShadow.update update] method. Similarly, the
			[page:PerspectiveCamera.aspect aspect] property will track the aspect of the
			[page:LightShadow.mapSize mapSize]. If the [page:SpotLight.distance distance] property of the light is
			set, the [page:PerspectiveCamera.far far] clipping plane will track that, otherwise it defaults to `500`.

		</p>

		<h3>[property:Number focus]</h3>
		<p>
			Used to focus the shadow camera. The camera's field of view is set as a percentage of the spotlight's field-of-view. Range is `[0, 1]`. Default is `1.0`.<br/>
		</p>

		<h3>[property:Boolean isSpotLightShadow]</h3>
		<p>
			Read-only flag to check if a given object is of type [name].
		</p>

		<h2>Methods</h2>
		<p>See the base [page:LightShadow LightShadow] class for common methods.</p>

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/lights/[name].js src/lights/[name].js]
		</p>
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