diff options
author | Ton Roosendaal <ton@blender.org> | 2011-04-27 15:58:34 +0400 |
---|---|---|
committer | Ton Roosendaal <ton@blender.org> | 2011-04-27 15:58:34 +0400 |
commit | da376e0237517543aa21740ee2363234ee1c20ae (patch) | |
tree | 014a513ed8d0eccc5e54fef42347781e85bae56a /intern/cycles/kernel/osl/nodes/node_glass_bsdf.osl | |
parent | 693780074388111e7b9ef1c3825e462f398dc6c4 (diff) |
Cycles render engine, initial commit. This is the engine itself, blender modifications and build instructions will follow later.
Cycles uses code from some great open source projects, many thanks them:
* BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs":
http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/
* Open Shading Language for a large part of the shading system:
http://code.google.com/p/openshadinglanguage/
* Blender for procedural textures and a few other nodes.
* Approximate Catmull Clark subdivision from NVidia Mesh tools:
http://code.google.com/p/nvidia-mesh-tools/
* Sobol direction vectors from:
http://web.maths.unsw.edu.au/~fkuo/sobol/
* Film response functions from:
http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php
Diffstat (limited to 'intern/cycles/kernel/osl/nodes/node_glass_bsdf.osl')
-rw-r--r-- | intern/cycles/kernel/osl/nodes/node_glass_bsdf.osl | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/nodes/node_glass_bsdf.osl b/intern/cycles/kernel/osl/nodes/node_glass_bsdf.osl new file mode 100644 index 00000000000..af946048011 --- /dev/null +++ b/intern/cycles/kernel/osl/nodes/node_glass_bsdf.osl @@ -0,0 +1,41 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "stdosl.h" +#include "node_fresnel.h" + +shader node_glass_bsdf( + color Color = color(0.8, 0.8, 0.8), + string distribution = "Sharp", + float Roughness = 0.2, + float Fresnel = 0.3, + normal Normal = N, + output closure color BSDF = diffuse(Normal)) +{ + float f = clamp(1.0 - Fresnel, 1e-5, 1.0 - 1e-5); + float eta = backfacing()? f: 1.0/f; + float Fr = fresnel_dielectric(I, Normal, eta); + + 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 == "GGX") + BSDF = Color*(Fr*microfacet_ggx(Normal, Roughness) + (1.0-Fr)*microfacet_ggx_refraction(Normal, Roughness, eta)); +} + |