Kenneth B Russell (kbrussel++at++media.mit.edu)
Wed, 27 May 1998 20:25:14 -0400 (EDT)
Here's some more information on what appears to be an iR bug with
hardware shadows. I have a call logged with support, but don't
think a bug has been filed yet by my assigned engineer. Anyway,
since the last email I have run this test case on two iR machines
and an old Onyx with RealityEngine graphics (and IrisGL shadows).
The bug occurs on both the iR machines but, significantly, NOT on
the RE. So clearly this is a new problem and hopefully therefore
can be fixed.
A quick summary: to demonstrate the problem you need to have a
machine with infiniteReality graphics and the Performer 2.2
distribution. cd to /tmp and do the following:
cc -n32 -o shadows /usr/share/Performer/src/pguide/libpf/C/shadows.c \
-lpf -lpfdu -lpfutil -lX11 -lGL -lGLU -limage -lm
then "shadows stool.flt" will bring up a chair with shadows
underneath it. There are two "glitches" during the light source's
360 degree animation cycle where the shadow appears to be
replaced with a big polygon. This bug looks exactly like what I'm
seeing in my Performer application, which uses shadows in a
similar way.
Could someone from SGI let me know whether this problem is
reproducible internally? We recently patched our Onyx2 up to the
May patch set and that didn't solve the problem.
Thanks very much.
-Ken
__________________________________________________________________________
Kenneth B. Russell Synthetic Characters Group, MIT Media Lab
kbrussel++at++media.mit.edu http://www.media.mit.edu/~kbrussel
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This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:57:26 PDT