forked from bartvdbraak/blender
Brecht Van Lommel
b12151eceb
* Anisotropic BSDF now supports GGX and Beckmann distributions, Ward has been removed because other distributions are superior. * GGX is now the default distribution for all glossy and anisotropic nodes, since it looks good, has low noise and is fast to evaluate. * Ashikhmin-Shirley is now available in the Glossy BSDF.
38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
Plaintext
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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#include "stdosl.h"
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#include "node_fresnel.h"
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shader node_glossy_bsdf(
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color Color = 0.8,
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string distribution = "GGX",
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float Roughness = 0.2,
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normal Normal = N,
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output closure color BSDF = 0)
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{
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if (distribution == "Sharp")
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BSDF = Color * reflection(Normal);
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else if (distribution == "Beckmann")
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BSDF = Color * microfacet_beckmann(Normal, Roughness);
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else if (distribution == "GGX")
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BSDF = Color * microfacet_ggx(Normal, Roughness);
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else
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BSDF = Color * ashikhmin_shirley(Normal, vector(0, 0, 0), Roughness, Roughness);
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}
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