diff options
author | Ton Roosendaal <ton@blender.org> | 2011-04-27 15:58:34 +0400 |
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committer | Ton Roosendaal <ton@blender.org> | 2011-04-27 15:58:34 +0400 |
commit | da376e0237517543aa21740ee2363234ee1c20ae (patch) | |
tree | 014a513ed8d0eccc5e54fef42347781e85bae56a /intern/cycles/kernel/svm/svm_displace.h | |
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/svm/svm_displace.h')
-rw-r--r-- | intern/cycles/kernel/svm/svm_displace.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_displace.h b/intern/cycles/kernel/svm/svm_displace.h new file mode 100644 index 00000000000..db8a8a13289 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_displace.h @@ -0,0 +1,51 @@ +/* + * 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. + */ + +CCL_NAMESPACE_BEGIN + +/* Bump Node */ + +__device void svm_node_set_bump(ShaderData *sd, float *stack, uint c_offset, uint x_offset, uint y_offset) +{ +#ifdef __RAY_DIFFERENTIALS__ + float h_c = stack_load_float(stack, c_offset); + float h_x = stack_load_float(stack, x_offset); + float h_y = stack_load_float(stack, y_offset); + + float3 Rx = cross(sd->dP.dy, sd->N); + float3 Ry = cross(sd->N, sd->dP.dx); + + float det = dot(sd->dP.dx, Rx); + float3 surfgrad = (h_x - h_c)*Rx + (h_y - h_c)*Ry; + + surfgrad *= 0.1f; /* todo: remove this factor */ + + sd->N = normalize(fabsf(det)*sd->N - signf(det)*surfgrad); +#endif +} + +/* Displacement Node */ + +__device void svm_node_set_displacement(ShaderData *sd, float *stack, uint fac_offset) +{ + float d = stack_load_float(stack, fac_offset); + sd->P += sd->N*d*0.1f; /* todo: get rid of this factor */ +} + +CCL_NAMESPACE_END + |