diff options
Diffstat (limited to 'intern/cycles/kernel/osl/shaders/node_fresnel.osl')
-rw-r--r-- | intern/cycles/kernel/osl/shaders/node_fresnel.osl | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/shaders/node_fresnel.osl b/intern/cycles/kernel/osl/shaders/node_fresnel.osl new file mode 100644 index 00000000000..cff084c344d --- /dev/null +++ b/intern/cycles/kernel/osl/shaders/node_fresnel.osl @@ -0,0 +1,26 @@ +/* + * 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_fresnel(float IOR = 1.45, normal Normal = N, output float Fac = 0.0) +{ + float f = max(IOR, 1e-5); + float eta = backfacing() ? 1.0 / f : f; + float cosi = dot(I, Normal); + Fac = fresnel_dielectric_cos(cosi, eta); +} |