samien
/
three.js
kopia lustrzana https://github.com/mrdoob/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
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		[page:Material] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			A standard physically based material, using Metallic-Roughness
			workflow.<br /><br />

			Physically based rendering (PBR) has recently become the standard in many
			3D applications, such as
			[link:https://blogs.unity3d.com/2014/10/29/physically-based-shading-in-unity-5-a-primer/ Unity],
			[link:https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/PhysicallyBased/ Unreal] and
			[link:http://area.autodesk.com/blogs/the-3ds-max-blog/what039s-new-for-rendering-in-3ds-max-2017 3D Studio Max].<br /><br />

			This approach differs from older approaches in that instead of using
			approximations for the way in which light interacts with a surface, a
			physically correct model is used. The idea is that, instead of tweaking
			materials to look good under specific lighting, a material can be created
			that will react 'correctly' under all lighting scenarios.<br /><br />

			In practice this gives a more accurate and realistic looking result than
			the [page:MeshLambertMaterial] or [page:MeshPhongMaterial], at the cost of
			being somewhat more computationally expensive. [name] uses per-fragment
			shading.<br /><br />

			Note that for best results you should always specify an [page:.envMap environment map]
			when using this material.<br /><br />

			For a non-technical introduction to the concept of PBR and how to set up a
			PBR material, check out these articles by the people at
			[link:https://www.marmoset.co marmoset]:
		</p>
		<ul>
			<li>
				[link:https://www.marmoset.co/posts/basic-theory-of-physically-based-rendering/ Basic Theory of Physically Based Rendering]
			</li>
			<li>
				[link:https://www.marmoset.co/posts/physically-based-rendering-and-you-can-too/ Physically Based Rendering and You Can Too]
			</li>
		</ul>
		<p>
			Technical details of the approach used in three.js (and most other PBR
			systems) can be found is this
			[link:https://media.disneyanimation.com/uploads/production/publication_asset/48/asset/s2012_pbs_disney_brdf_notes_v3.pdf paper from Disney]
			(pdf), by Brent Burley.
		</p>

		<iframe
			id="scene"
			src="scenes/material-browser.html#MeshStandardMaterial"
		></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>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.<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] 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 aoMap]</h3>
		<p>
			The red channel of this texture is used as the ambient occlusion map.
			Default is null. The aoMap requires a second set of UVs.
		</p>

		<h3>[property:Float aoMapIntensity]</h3>
		<p>
			Intensity of the ambient occlusion effect. Range is 0-1, where `0`
			disables ambient occlusion. Where intensity is `1` and the [page:.aoMap]
			red channel is also `1`, ambient light is fully occluded on a surface.
			Default is `1`.
		</p>

		<h3>[property:Texture bumpMap]</h3>
		<p>
			The texture to create a bump map. The black and white values map to the
			perceived depth in relation to the lights. Bump doesn't actually affect
			the geometry of the object, only the lighting. If a normal map is defined
			this will be ignored.
		</p>

		<h3>[property:Float bumpScale]</h3>
		<p>
			How much the bump map affects the material. Typical ranges are 0-1.
			Default is `1`.
		</p>

		<h3>[property:Color color]</h3>
		<p>[page:Color] of the material, by default set to white (0xffffff).</p>

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

			This is used by the [page:WebGLRenderer] for selecting shaders.
		</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.
			The bias is added to the scaled sample of the displacement map.
			Without a displacement map set, this value is not applied. Default is `0`.
		</p>
		<h3>[property:Color emissive]</h3>
		<p>
			Emissive (light) color of the material, essentially a solid color
			unaffected by other lighting. Default is black.
		</p>

		<h3>[property:Texture emissiveMap]</h3>
		<p>
			Set emissive (glow) map. Default is null. The emissive map color is
			modulated by the emissive color and the emissive intensity. If you have an
			emissive map, be sure to set the emissive color to something other than
			black.
		</p>

		<h3>[property:Float emissiveIntensity]</h3>
		<p>
			Intensity of the emissive light. Modulates the emissive color. Default is
			1.
		</p>

		<h3>[property:Texture envMap]</h3>
		<p>
			The environment map. To ensure a physically correct rendering, you should
			only add environment maps which were preprocessed by
			[page:PMREMGenerator]. Default is null.
		</p>

		<h3>[property:Euler envMapRotation]</h3>
		<p>
			The rotation of the environment map in radians. Default is `(0,0,0)`.
		</p>

		<h3>[property:Float envMapIntensity]</h3>
		<p>Scales the effect of the environment map by multiplying its color.</p>

		<h3>[property:Boolean flatShading]</h3>
		<p>
			Define whether the material is rendered with flat shading. Default is
			false.
		</p>

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

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

		<h3>[property:Texture lightMap]</h3>
		<p>
			The light map. Default is null. The lightMap requires a second set of UVs.
		</p>

		<h3>[property:Float lightMapIntensity]</h3>
		<p>Intensity of the baked light. Default is `1`.</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. The texture map color is modulated by the diffuse [page:.color].
		</p>

		<h3>[property:Float metalness]</h3>
		<p>
			How much the material is like a metal. Non-metallic materials such as wood
			or stone use `0.0`, metallic use `1.0`, with nothing (usually) in between.
			Default is `0.0`. A value between `0.0` and `1.0` could be used for a rusty
			metal look. If metalnessMap is also provided, both values are multiplied.
		</p>

		<h3>[property:Texture metalnessMap]</h3>
		<p>
			The blue channel of this texture is used to alter the metalness of the
			material.
		</p>

		<h3>[property:Texture normalMap]</h3>
		<p>
			The texture to create a normal map. The RGB values affect the surface
			normal for each pixel fragment and change the way the color is lit. Normal
			maps do not change the actual shape of the surface, only the lighting. In
			case the material has a normal map authored using the left handed
			convention, the y component of normalScale should be negated to compensate
			for the different handedness.
		</p>

		<h3>[property:Integer normalMapType]</h3>
		<p>
			The type of normal map.<br /><br />

			Options are [page:constant THREE.TangentSpaceNormalMap] (default), and
			[page:constant THREE.ObjectSpaceNormalMap].
		</p>

		<h3>[property:Vector2 normalScale]</h3>
		<p>
			How much the normal map affects the material. Typical ranges are 0-1.
			Default is a [page:Vector2] set to (1,1).
		</p>

		<h3>[property:Float roughness]</h3>
		<p>
			How rough the material appears. `0.0` means a smooth mirror reflection, `1.0`
			means fully diffuse. Default is `1.0`. If roughnessMap is also provided,
			both values are multiplied.
		</p>

		<h3>[property:Texture roughnessMap]</h3>
		<p>
			The green channel of this texture is used to alter the roughness of the
			material.
		</p>

		<h3>[property:Boolean wireframe]</h3>
		<p>
			Render geometry as wireframe. Default is `false` (i.e. render as flat
			polygons).
		</p>

		<h3>[property:String wireframeLinecap]</h3>
		<p>
			Define appearance of line ends. Possible values are "butt", "round" and
			"square". Default is 'round'.<br /><br />

			This corresponds to the
			[link:https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/lineCap 2D Canvas lineCap]
			property and it is ignored by the [page:WebGLRenderer WebGL] renderer.
		</p>

		<h3>[property:String wireframeLinejoin]</h3>
		<p>
			Define appearance of line joints. Possible values are "round", "bevel" and
			"miter". Default is 'round'.<br /><br />

			This corresponds to the
			[link:https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/lineJoin 2D Canvas lineJoin]
			property and it is ignored by the [page:WebGLRenderer WebGL] renderer.
		</p>

		<h3>[property:Float wireframeLinewidth]</h3>
		<p>
			Controls wireframe thickness. Default is `1`.<br /><br />

			Due to limitations of the
			[link:https://www.khronos.org/registry/OpenGL/specs/gl/glspec46.core.pdf OpenGL Core Profile]
			with the [page:WebGLRenderer WebGL] renderer on most
			platforms linewidth will always be `1` regardless of the set value.
		</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>
	</body>
</html>