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


			
				
					
						
						
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		[page:Material] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			[name] is internally used for implementing shadow mapping with
			[page:PointLight]s.<br /><br />

			Can also be used to customize the shadow casting of an object by assigning
			an instance of [name] to [page:Object3D.customDistanceMaterial]. The
			following examples demonstrates this approach in order to ensure
			transparent parts of objects do no cast shadows.
		</p>

		<h2>Examples</h2>

		<p>[example:webgl_shadowmap_pointlight WebGL / shadowmap / pointlight]</p>

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		<h2>Constructor</h2>

		<h3>[name]( [param:Object parameters] )</h3>
		<p>
			[page:Object parameters] - (optional) an object with one or more
			properties defining the material's appearance. Any property of the
			material (including any property inherited from [page:Material]) can be
			passed in here.
		</p>

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

		<h3>[property:Texture alphaMap]</h3>
		<p>
			The alpha map is a grayscale texture that controls the opacity across the
			surface (black: fully transparent; white: fully opaque). Default is
			null.<br /><br />

			Only the color of the texture is used, ignoring the alpha channel if one
			exists. For RGB and RGBA textures, the [page:WebGLRenderer WebGL] renderer
			will use the green channel when sampling this texture due to the extra bit
			of precision provided for green in DXT-compressed and uncompressed RGB 565
			formats. Luminance-only and luminance/alpha textures will also still work
			as expected.
		</p>

		<h3>[property:Texture displacementMap]</h3>
		<p>
			The displacement map affects the position of the mesh's vertices. Unlike
			other maps which only affect the light and shade of the material the
			displaced vertices can cast shadows, block other objects, and otherwise
			act as real geometry. The displacement texture is an image where the value
			of each pixel (white being the highest) is mapped against, and
			repositions, the vertices of the mesh.
		</p>

		<h3>[property:Float displacementScale]</h3>
		<p>
			How much the displacement map affects the mesh (where black is no
			displacement, and white is maximum displacement). Without a displacement
			map set, this value is not applied. Default is `1`.
		</p>

		<h3>[property:Float displacementBias]</h3>
		<p>
			The offset of the displacement map's values on the mesh's vertices.
			Without a displacement map set, this value is not applied. Default is `0`.
		</p>

		<h3>[property:Boolean fog]</h3>
		<p>Whether the material is affected by fog. Default is `false`.</p>

		<h3>[property:Texture map]</h3>
		<p>
			The color map. May optionally include an alpha channel, typically combined
			with [page:Material.transparent .transparent] or [page:Material.alphaTest .alphaTest]. 
			Default is null.
		</p>

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

		<h2>Source</h2>
		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
		</p>
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