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View Full Version : SLIM: RSL occlusion switch from read to bake


Bitterpea
05-07-2005, 02:02 AM
I wrote a SLIM palette for occlusion that has a switch between baking a point cloud and reading a brickmap. This is just the RSL code inside the .slim file. For straight RSL, The "void" would be changed to "surface" , among other changes...
Mode 0 is read and 1 is bake. After baking with raytracing, one can convert the point cloud to a brickmap, and switch it to read. Then you don't need to raytrace for occlusion renders.
When baking, SLIM palette must contain a ribbox called "FrameBox" that says
DisplayChannel "occlusion"

A current error with the filename is that if you use a colon in the filename, it throws an unknown variable type in the point cloud display driver, and the point cloud can't be converted into a brickmap. By default it renders to the maya/bin folder.
EDIT: solution: https://renderman.pixar.com/forum/showthread.php?s=&threadid=3358


defaults are: opacity 1,1,1
samples 64
maxdist 5
file "file.ptc"
mode 0
displaychannels "occlusion"
Ci 1,1,1
Oi 1,1,1
envdir 0


RSLFunction {
void byus1e_occSwitch( color opacity;
float samples;
float maxdist;
string file;
float mode;
string displaychannels;
output color Ci;
output color Oi;
output vector envdir;)
{
float occ = 0;
float ok;
normal Nn = normalize(N);
/***read***/
if(mode == 0) {
ok = texture3d(file, P, Nn, displaychannels, occ);
/***if texture didn't exist, render white.****/
if (ok != 1)
occ = 0;

}
/***write***/
else
{
occ = occlusion(P, Nn, samples, "maxdist", maxdist, "environmentdir", envdir);
bake3d(file, displaychannels, P, Nn, displaychannels, occ);
}
Oi = opacity;
Ci = (1 - occ) * Oi;
}

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