off axis projection pfMakePerscFrust
Felix Shung (shung++at++ernie.arc.nasa.gov)
Thu, 5 Jan 95 13:34:42 -0800
I experience some problems with "pfMakePerscFrust". I use "pfMakePersFrust"
to create off axis projection in my application which is based on SGI demo
program "perfly". Part of the screen, in the direction toward where
the line of sight is pointing at , was never refreshed correctly. There were
two old images being displayed in this area alternately and the correct
image was overlaid by these two wrong images. The image looked normal
when symmetric (on axis) projection was used. The "pfMakePerscFrust" was
called in the function "PreFrame". I tested the pfMakePerscFrust with the
same arguments in the demo program "simple.c" and it looked just fine.
Could any body give me a clue what might cause this problem?
Felix
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on Mon Aug 10 1998 - 17:50:49 PDT