9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
31 lines
1.2 KiB
Plaintext
31 lines
1.2 KiB
Plaintext
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#include "node_fresnel.h"
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#include "stdcycles.h"
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shader node_glass_bsdf(color Color = 0.8,
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string distribution = "sharp",
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float Roughness = 0.2,
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float IOR = 1.45,
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normal Normal = N,
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output closure color BSDF = 0)
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{
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float f = max(IOR, 1e-5);
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float eta = backfacing() ? 1.0 / f : f;
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float cosi = dot(I, Normal);
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float Fr = fresnel_dielectric_cos(cosi, eta);
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float roughness = Roughness * Roughness;
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if (distribution == "sharp")
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BSDF = Color * (Fr * reflection(Normal) + (1.0 - Fr) * refraction(Normal, eta));
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else if (distribution == "beckmann")
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BSDF = Color * (Fr * microfacet_beckmann(Normal, roughness) +
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(1.0 - Fr) * microfacet_beckmann_refraction(Normal, roughness, eta));
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else if (distribution == "Multiscatter GGX")
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BSDF = Color * microfacet_multi_ggx_glass(Normal, roughness, eta, Color);
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else if (distribution == "GGX")
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BSDF = Color * (Fr * microfacet_ggx(Normal, roughness) +
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(1.0 - Fr) * microfacet_ggx_refraction(Normal, roughness, eta));
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}
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