javascript
/
three.js
zrcadlo https://github.com/tazdij/three.js.git


			
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		<h1>[name]</h1>

		<p class="desc">
			该类作为其他阴影类的基类来使用。
		</p>


		<h2>构造函数</h2>

		<h3>[name]( [param:Camera camera] )</h3>
		<p>
		[page:Camera camera] - 在光的世界里<br /><br />

			创建一个新的[name]。这不能直接调用的 - 它由其他阴影用作基类。
		</p>

		<h2>属性</h2>

		<h3>[property:Camera camera]</h3>
		<p>
			光的世界里。这用于生成场景的深度图;从光的角度来看，其他物体背后的物体将处于阴影中。
		</p>

		<h3>[property:Float bias]</h3>
		<p>
			阴影贴图偏差，在确定曲面是否在阴影中时，从标准化深度添加或减去多少。<br />
			默认值为0.此处非常小的调整（大约0.0001）可能有助于减少阴影中的伪影
		</p>

		<h3>[property:Float normalOffset]</h3>
		<p>Defines how much the position used to query the shadow map is offset along the object normal.</p>
		<p>The default is 0. Increasing this value can be used to reduce shadow acne especially in large scenes where light shines onto geometry at a shallow angle. The cost is that shadows may appear distorted.</p>

		<h3>[property:WebGLRenderTarget map]</h3>
		<p>
			使用内置摄像头生成的深度图;超出像素深度的位置在阴影中。在渲染期间内部计算。
		</p>

		<h3>[property:WebGLRenderTarget mapPass]</h3>
		<p>
			The distribution map generated using the internal camera; an occlusion is calculated based 
			on the distribution of depths. Computed internally during rendering.
		</p>

		<h3>[property:Vector2 mapSize]</h3>
		<p>
			一个[Page:Vector2]定义阴影贴图的宽度和高度。<br /><br />

			较高的值会以计算时间为代价提供更好的阴影质量。值必须是2的幂，直到给定设备的[page:WebGLRenderer.capabilities].maxTextureSize，
			虽然宽度和高度不必相同（例如，（512,1024）有效）。
			默认值为*（512,512）*。
		</p>


		<h3>[property:Matrix4 matrix]</h3>
		<p>
			模拟阴影相机空间，计算阴影贴图中的位置和深度。存储在[page:Matrix4 Matrix4]中。这是在渲染期间内部计算的。
		</p>

		<h3>[property:Float radius]</h3>
		<p>
			将此值设置为大于1的值将模糊阴影的边缘。<br />

			较高的值会在阴影中产生不必要的条带效果 - 更大的[page:.mapSize mapSize]将允许在这些效果变得可见之前使用更高的值。<br />
			If [page:WebGLRenderer.shadowMap.type] is set to [page:Renderer PCFSoftShadowMap], radius has 
			no effect and it is recommended to increase softness by decreasing [page:.mapSize mapSize] instead.<br /><br />
			
			请注意，如果[page：WebGLRenderer.shadowMap.type]设置为[page:Renderer BasicShadowMap]，将会无效。
		</p>


		<h2>方法</h2>
		
		<h3>[method:Vector2 getFrameExtents]()</h3>
		<p>
		Used internally by the renderer to extend the shadow map to contain all viewports
		</p>

		<h3>[method:null updateMatrices]( [param:Light light] )</h3>
		<p>
		Update the matrices for the camera and shadow, used internally by the renderer.<br /><br />

		light -- the light for which the shadow is being rendered.
		</p>

		<h3>[method:Frustum getFrustum]()</h3>
		<p>
		Gets the shadow cameras frustum. Used internally by the renderer to cull objects.
		</p>

		<h3>[method:number getViewportCount]()</h3>
		<p>
		Used internally by the renderer to get the number of viewports that need to be rendered for this shadow.
		</p>

		<h3>[method:LightShadow copy]( [param:LightShadow source] )</h3>
		<p>
			将[page:LightShadow source]中的所有属性的值复制到该Light。
		</p>

		<h3>[method:LightShadow clone]()</h3>
		<p>
			克隆与此相同属性的新LightShadow。
		</p>

		<h3>[method:Object toJSON]()</h3>
		<p>
			序列化这个LightShadow。
		</p>

		<h2>源码</h2>
		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/lights/[name].js src/lights/[name].js]
		</p>
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