Reading Z-buffer

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Shawn Soeder (shawn_soeder++at++esplt14m-s.grumman.com)
7 Dec 1995 15:02:23 -0500

Hello,

I'm trying to read the z-buffer by calling a routine at the end of perfly's
PostDraw() routine. This routine uses the following gl code:

    readsource(SRC_ZBUFFER);
    lrectread(300,300,500,500,parray);

This doesn't work. If I use SRC_FRONT I can easily read the front buffer.
Is the depth buffer being cleared somewhere in Performer's Draw process?

Thanks,
Shawn

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