viewport resizing

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Doug Price (doug++at++ren.paradigmsim.com)
Tue, 8 Jul 1997 05:39:49 -0500

        I am trying to perform a two pass rendering of sorts using a single
pfChannel. The first pass draws a normal perspective channel. Then when the
first pass is completed, I generate a texture of the perspective image which is
then mapped to a 2-D tmesh. The channel is then cleared and the 2-D tmesh
drawn as an orthographic image. This all seems to work fine, however, I would
like to have the ability to have the orthographic image be a different size
(possibly overlapping) the perspective image. When I call glViewport it seems
to ignore the command. If I compile irisgl and use viewport instead, my code
works fine.

        Is performer doing something different in regards to viewport resizing
for open gl that would prevent me from doing this? Has anyone else ran into
this problem? Is there a way around it?

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