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


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8" />
		<base href="../../../" />
		<script src="page.js"></script>
		<link type="text/css" rel="stylesheet" href="page.css" />
	</head>
	<body>
		[page:Material] &rarr; [page:MeshStandardMaterial] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			An extension of the [page:MeshStandardMaterial], providing more advanced
			physically-based rendering properties:
		</p>

		<ul>
			<li>
				<b>Clearcoat:</b> Some materials — like car paints, carbon fiber, and
				wet surfaces — require a clear, reflective layer on top of another layer
				that may be irregular or rough. Clearcoat approximates this effect,
				without the need for a separate transparent surface.
			</li>
			<li>
				<b>Physically-based transparency:</b> One limitation of
				[page:Material.opacity .opacity] is that highly transparent materials
				are less reflective. Physically-based [page:.transmission] provides a
				more realistic option for thin, transparent surfaces like glass.
			</li>
			<li>
				<b>Advanced reflectivity:</b> More flexible reflectivity for
				non-metallic materials.
			</li>
			<li>
				<b>Sheen:</b> Can be used for representing cloth and fabric materials.
			</li>
		</ul>

		<p>
			As a result of these complex shading features, MeshPhysicalMaterial has a
			higher performance cost, per pixel, than other three.js materials. Most
			effects are disabled by default, and add cost as they are enabled. For
			best results, always specify an [page:.envMap environment map] when using
			this material.
		</p>

		<iframe
			id="scene"
			src="scenes/material-browser.html#MeshPhysicalMaterial"
		></iframe>

		<script>

		// iOS iframe auto-resize workaround

		if ( /(iPad|iPhone|iPod)/g.test( navigator.userAgent ) ) {

			const scene = document.getElementById( 'scene' );

			scene.style.width = getComputedStyle( scene ).width;
			scene.style.height = getComputedStyle( scene ).height;
			scene.setAttribute( 'scrolling', 'no' );

		}

		</script>

		<h2>Examples</h2>
		<p>
			[example:webgl_materials_physical_clearcoat materials / physical / clearcoat]<br />
			[example:webgl_loader_gltf_sheen loader / gltf / sheen]<br />
			[example:webgl_materials_physical_transmission materials / physical / transmission]
		</p>

		<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] and
			[page:MeshStandardMaterial]) can be passed in here.<br /><br />

			The exception is the property [page:Hexadecimal color], which can be
			passed in as a hexadecimal string and is `0xffffff` (white) by default.
			[page:Color.set]( color ) is called internally.
		</p>

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

		<h3>[property:Color attenuationColor]</h3>
		<p>
			The color that white light turns into due to absorption when reaching the
			attenuation distance. Default is `white` (0xffffff).
		</p>

		<h3>[property:Float attenuationDistance]</h3>
		<p>
			Density of the medium given as the average distance that light travels in
			the medium before interacting with a particle. The value is given in world
			space units, and must be greater than zero. Default is `Infinity`.
		</p>

		<h3>[property:Float clearcoat]</h3>
		<p>
			Represents the intensity of the clear coat layer, from `0.0` to `1.0`. Use
			clear coat related properties to enable multilayer materials that have a
			thin translucent layer over the base layer. Default is `0.0`.
		</p>

		<h3>[property:Texture clearcoatMap]</h3>
		<p>
			The red channel of this texture is multiplied against [page:.clearcoat],
			for per-pixel control over a coating's intensity. Default is `null`.
		</p>

		<h3>[property:Texture clearcoatNormalMap]</h3>
		<p>
			Can be used to enable independent normals for the clear coat layer.
			Default is `null`.
		</p>

		<h3>[property:Vector2 clearcoatNormalScale]</h3>
		<p>
			How much [page:.clearcoatNormalMap] affects the clear coat layer, from
			`(0,0)` to `(1,1)`. Default is `(1,1)`.
		</p>

		<h3>[property:Float clearcoatRoughness]</h3>
		<p>
			Roughness of the clear coat layer, from `0.0` to `1.0`. Default is `0.0`.
		</p>

		<h3>[property:Texture clearcoatRoughnessMap]</h3>
		<p>
			The green channel of this texture is multiplied against
			[page:.clearcoatRoughness], for per-pixel control over a coating's
			roughness. Default is `null`.
		</p>

		<h3>[property:Object defines]</h3>
		<p>
			An object of the form:
			<code>
			{ 
				'STANDARD': '',
				'PHYSICAL': '', 
			};
			</code>

			This is used by the [page:WebGLRenderer] for selecting shaders.
		</p>

		<h3>[property:Float ior]</h3>
		<p>
			Index-of-refraction for non-metallic materials, from `1.0` to `2.333`.
			Default is `1.5`.
		</p>

		<h3>[property:Float reflectivity]</h3>
		<p>
			Degree of reflectivity, from `0.0` to `1.0`. Default is `0.5`, which
			corresponds to an index-of-refraction of 1.5.<br />

			This models the reflectivity of non-metallic materials. It has no effect
			when [page:MeshStandardMaterial.metalness metalness] is `1.0`
		</p>

		<h3>[property:Float iridescence]</h3>
		<p>
			The intensity of the [link:https://en.wikipedia.org/wiki/Iridescence iridescence] layer, simulating RGB color shift based on the angle between the surface and the viewer, from `0.0` to `1.0`. Default is `0.0`.
		</p>

		<h3>[property:Texture iridescenceMap]</h3>
		<p>
			The red channel of this texture is multiplied against
			[page:.iridescence], for per-pixel control over iridescence.
			Default is `null`.
		</p>

		<h3>[property:Float iridescenceIOR]</h3>
		<p>
			Strength of the iridescence RGB color shift effect, represented by an index-of-refraction. Between `1.0` to `2.333`.
			Default is `1.3`.
		</p>

		<h3>[property:Array iridescenceThicknessRange]</h3>
		<p>
			Array of exactly 2 elements, specifying minimum and maximum thickness of the iridescence layer.
			Thickness of iridescence layer has an equivalent effect of the one [page:.thickness] has on [page:.ior].
			Default is `[100, 400]`.<br />

			If [page:.iridescenceThicknessMap] is not defined, iridescence thickness will use only the second element of the given array.
		</p>

		<h3>[property:Texture iridescenceThicknessMap]</h3>
		<p>
			A texture that defines the thickness of the iridescence layer, stored in the green channel.
			Minimum and maximum values of thickness are defined by [page:.iridescenceThicknessRange] array:<br/>
			<ul>
				<li>`0.0` in the green channel will result in thickness equal to first element of the array.</li>
				<li>`1.0` in the green channel will result in thickness equal to second element of the array.</li>
				<li>Values in-between will linearly interpolate between the elements of the array.</li>
			</ul>
			Default is `null`.
		</p>

		<h3>[property:Float sheen]</h3>
		<p>
			The intensity of the sheen layer, from `0.0` to `1.0`. Default is `0.0`.
		</p>

		<h3>[property:Float sheenRoughness]</h3>
		<p>Roughness of the sheen layer, from `0.0` to `1.0`. Default is `1.0`.</p>

		<h3>[property:Texture sheenRoughnessMap]</h3>
		<p>
			The alpha channel of this texture is multiplied against
			[page:.sheenRoughness], for per-pixel control over sheen roughness.
			Default is `null`.
		</p>

		<h3>[property:Color sheenColor]</h3>
		<p>The sheen tint. Default is `0x000000`, black.</p>

		<h3>[property:Texture sheenColorMap]</h3>
		<p>
			The RGB channels of this texture are multiplied against
			[page:.sheenColor], for per-pixel control over sheen tint. Default is
			`null`.
		</p>

		<h3>[property:Float specularIntensity]</h3>
		<p>
			A float that scales the amount of specular reflection for non-metals only.
			When set to zero, the model is effectively Lambertian. From `0.0` to
			`1.0`. Default is `1.0`.
		</p>

		<h3>[property:Texture specularIntensityMap]</h3>
		<p>
			The alpha channel of this texture is multiplied against
			[page:.specularIntensity], for per-pixel control over specular intensity.
			Default is `null`.
		</p>

		<h3>[property:Color specularColor]</h3>
		<p>
			A [page:Color] that tints the specular reflection at normal incidence for
			non-metals only. Default is `0xffffff`, white.
		</p>

		<h3>[property:Texture specularColorMap]</h3>
		<p>
			The RGB channels of this texture are multiplied against
			[page:.specularColor], for per-pixel control over specular color. Default
			is `null`.
		</p>

		<h3>[property:Float thickness]</h3>
		<p>
			The thickness of the volume beneath the surface. The value is given in the
			coordinate space of the mesh. If the value is `0` the material is
			thin-walled. Otherwise the material is a volume boundary. Default is `0`.
		</p>

		<h3>[property:Texture thicknessMap]</h3>
		<p>
			A texture that defines the thickness, stored in the green channel. This will
			be multiplied by [page:.thickness]. Default is `null`.
		</p>

		<h3>[property:Float transmission]</h3>
		<p>
			Degree of transmission (or optical transparency), from `0.0` to `1.0`.
			Default is `0.0`.<br />

			Thin, transparent or semitransparent, plastic or glass materials remain
			largely reflective even if they are fully transmissive. The transmission
			property can be used to model these materials.<br />

			When transmission is non-zero, [page:Material.opacity opacity] should be
			set to `1`.
		</p>

		<h3>[property:Texture transmissionMap]</h3>
		<p>
			The red channel of this texture is multiplied against
			[page:.transmission], for per-pixel control over optical transparency.
			Default is `null`.
		</p>

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

		<h2>Source</h2>

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