From: Angus Dorbie (dorbie++at++sgi.com)
Date: 02/02/2000 13:39:50
Clipping is a part of the OpenGL implementation. Performer knows nothing
about the geometric result.
You'd have to use a discriminator to test the hit point against the
plane equation and reject or accept the result accordingly.
Cheers,Angus.
ramey wrote:
>
> Anyone have any idea if Performer can use clipping planes? I know I can
> add a draw call back and enable a few glClipPlanes, but unfortunately
> this won't stop performer from intersecting with geometry that I told
> the Draw process to throw out.
>
> It would be nice if I could clip the SceneGraph BEFORE the Isect process
> takes a copy of the SceneGraph.
>
> We were thinking of adding some sort of discriminator callback to remind
> the ISECT that certain portions of the Scene Graph are actually
> invisible, but I was hoping there might be a better way.
> --
> "Haven't you heard? We come in six packs now." -Zaphod Beeblebrox
> Larry E. Ramey
> ramey++at++de-solutions.com
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-- For Performer+OpenGL tutorials http://www.dorbie.com/ My comment on the abuse of Jon Johanson's rights; After giving up raiding their neighboring countries the Norse men have taken to raiding 16 year old kids in their bedrooms. Very sad.
This archive was generated by hypermail 2b29 : Wed Feb 02 2000 - 13:40:04 PST