Mark Visconti (visconti++at++acusoft.com)
Fri, 25 Oct 1996 11:33:25 -0400 (EDT)
Initially, I was able to get everything working using the basic
1 bitplane of stencil and calls to the appropriate OpenGL functions.
Unfortunately, we switched to using stenciling for pfLayers as
displacement didn't seem to be doing the job. I reconfigured the
pipe for 8 bits of stencil (overkill, I know), but have been unsuccessful
getting everything working again. The man pages state that pfLayers()
use only the first stencil plane, but I appear to be seeing other side
effects.
When using stencil for pfLayers are the stencil planes being cleared
when a layer is drawn ? Is the stencil plane being cleared at any time
other than when requested through glClearStencil() and glClear() or via
pfClear() ? What about the mask, stencil operation or stencil function ?
Do stencil'ed pfLayers return the stencil parameters back to their last
values ? Are there anything other changes made to the stencil planes
when using pfLayers to stencil ? Are there any examples of
stencil'ed pfLayers coexisting with opengl or gl based stenciling ?
Thanks,
Mark Visconti
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