diff options
Diffstat (limited to 'intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl')
-rw-r--r-- | intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl b/intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl new file mode 100644 index 00000000000..0042d573f8d --- /dev/null +++ b/intern/cycles/kernel/osl/shaders/node_glass_bsdf.osl @@ -0,0 +1,43 @@ +/* + * Copyright 2011-2013 Blender Foundation + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "node_fresnel.h" +#include "stdcycles.h" + +shader node_glass_bsdf(color Color = 0.8, + string distribution = "sharp", + float Roughness = 0.2, + float IOR = 1.45, + normal Normal = N, + output closure color BSDF = 0) +{ + float f = max(IOR, 1e-5); + float eta = backfacing() ? 1.0 / f : f; + float cosi = dot(I, Normal); + float Fr = fresnel_dielectric_cos(cosi, eta); + float roughness = Roughness * Roughness; + + if (distribution == "sharp") + BSDF = Color * (Fr * reflection(Normal) + (1.0 - Fr) * refraction(Normal, eta)); + else if (distribution == "beckmann") + BSDF = Color * (Fr * microfacet_beckmann(Normal, roughness) + + (1.0 - Fr) * microfacet_beckmann_refraction(Normal, roughness, eta)); + else if (distribution == "Multiscatter GGX") + BSDF = Color * microfacet_multi_ggx_glass(Normal, roughness, eta, Color); + else if (distribution == "GGX") + BSDF = Color * (Fr * microfacet_ggx(Normal, roughness) + + (1.0 - Fr) * microfacet_ggx_refraction(Normal, roughness, eta)); +} |