Re: mixing gl with performer

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Jim Helman (jimh++at++surreal)
Thu, 20 Oct 94 19:19:09 -0700

   
> 1) Query the graphics screen to get the z-buffer values and
> the pixel values of a performer scene?
   
Z can not be read back on RealityEngine when multisampling.
Other than that limitation, just use lrectread with the
appropriate readsource in the channel post-draw callback.

> 2) Put semi-transparent gl objects over a Performer scene?
   
Place the transparent 3D stuff stright in the scene graph, or if
it's something like a 2D HUD, you could make own GL calls in the
channel post-draw callback.

rgds,

-jim helman

jimh++at++surreal.asd.sgi.com
415/390-1151

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