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From theseas!fs.Princeton.EDU!cek Wed, 28 Apr 93 01:39:48 EET
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From: Larry Coffin <clciris.chem.umr.edu!lcoffin>
To: cs.Princeton.EDU!rayshade-users
Subject: CSG speedup (bug fix)
Currently the "checkbounds" flag for CSG objects is set to FALSE.
This results in checking each object in the tree for ray->object intersection
rather than checking the bounding box of the whole tree (and each branch on
down the tree) first.
To fix this, change the setting for the "checkbounds" flag from
FALSE to TRUE in libray/libobj/csg.c in the CsgMethods() routine.
This can result in major speedups for scenes that have alot and/or
detailed CSG objects. One file (a modified clean.ray) ran in 1/3 the time.
---Larry Coffin
lcoffin@clciris.chem.umr.edu
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