pfNode::isect() on deep scenes.

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From: Bram Stolk (bram++at++sara.nl)
Date: 04/11/2002 06:32:10

Hello,

I am getting crashes on pfNode::isect() when isecting with geometry
that has been deeply nested.

I get bus errors and segm violations.

Interestingly, I can intersect geometry that is at lvl 30 with
no problem, even if the entire scene is 100 deep.
But if I intersect something in the same scene at levels of
32 and above, I get crashes.

I do my intersections with pfPath specifications enabled.

Maybe pfPaths cannot be larger than 32 entries?

The crash occurs in pfNode::isect() itself, before I can
access the pfPath structure.

I am on IRIX and an Onyx IR2.
For a dbx trace, see:

> 0 pfList::reset(void)(0x3ed17245, 0x0, 0x400, 0x0, 0x4becb60, 0x0, 0x0, 0x49b0fe74) ["/build/perfbuild/perftot1/perf/lib/libpr/pfList.C":536, 0x4525008]
   1 pfNode::pf_isect(pfSegSet*,pfHit***,pfChannel*,pfMatrix*)(0x3ed17245, 0x0, 0x0, 0x0, 0x4becb60, 0x0, 0x0, 0x49b0fe74) ["/build/perfbuild/perftot1/perf/lib/libpf/pfNode.C":1388, 0x43b5400]
   2 pfNode::nb_isect(pfSegSet*,pfHit***)(0x3ed17245, 0x0, 0x400, 0x0, 0x4becb60, 0x0, 0x0, 0x49b0fe74) ["/build/perfbuild/perftot1/perf/lib/libpf/pfNode.C":875, 0x43b3fe0]
   3 pfNode::isect(pfSegSet*,pfHit***)(this = 0x481d9fd0, segSet = 0x7fff1e88, hits = 0x7fff2308) ["/usr/include/Performer/pf/pfNode.h":193, 0x49fc89c]
   4 Selector::FindIntersected(pfNode*,pfMatrix&,float)(this = 0x101e6600, root = 0x481d9fd0, mat = 0x49b16740, grabsize = 4.0) ["/home/sara/bram/saradist/src/sarasim/selector.C":170, 0x49fd1f8]

Anyone experienced something similar?

thx

  Bram 

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