Re: info-performer Mar 07 1999

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Dave Pape (pape++at++evl.uic.edu)
Mon, 8 Mar 1999 19:47:35 -0600 (CST)

On Mon, 8 Mar 1999, Angus Dorbie wrote:
>
> You also call this which is confusing:
>
> pfCAVEPreDrawFunc(appPreDraw); // do any OpenGL rendering
>
> You can't call OpenGL from the app when forking the draw.

Actually, pfCAVEPreDrawFunc() sets a callback pointer for the drawing
process. The function appPreDraw() will be called just before pfDraw(),
in a draw-stage channel traversal function.
(The callback pointer is passed through a pfCycleBuffer, which is
updated by his call to pfCAVEPreFrame().)

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Dave Pape Electronic Visualization Laboratory, UIC
pape++at++evl.uic.edu http://www.evl.uic.edu/pape/

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