Mirror image rendering

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Nathaniel Bletter (nat++at++od.sri.com)
Thu, 30 Jan 1997 17:53:07 -0800

Does anyone know how to vertically flip the image produced by perfomer? I'm
viewing the monitor in a mirror and need to compensate for it.

I tried creating a perspective frustrum with the top < bottom, but this seems
to reverse all the normals, messing up back face culling and lighting, and does
weird things with the near and far clipping planes.

I also tried to do a
        pfGetChanViewMat(chan, view);
        pfPostMultMat(view, inv);
        pfChanViewMat(chan, view);
where inv = {1, 0, 0, 0,
                0, -1, 0, 0,
                0, 0, 1, 0,
                0, 0, 0, 1}

This seemed to do nothing. Any ideas?

--


Nat Bletter
SRI International
nat++at++od.sri.com
http://os.sri.com/people/nat/
(415) 859-4358
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