Re: zbuffer() & zwritemask in Performer

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Jorge Valencia Loera (valencia_jorge++at++hotmail.com)
Tue, 20 Jul 1999 18:45:40 EDT


Angus Dorbie wrote:

>Performer state shouldn't be clobbering this either (but maybe my >IrisGL
>is rusty). coplanar surface offset code may be clobbering your
>writemask. Do you have pfLayers in the scene graph?

No I don't

>Depth mapped shadows DELIBERATELY clear a red background to show up
>errors in the rendering.
>If you have channels split up and maybe your light on a foreground
>channel then the depth map will be drawn before that channel and the >red
>will overwrite the background channel.

So if you need to implement a multi pass algorithm that may need to draw
something (background in my case) and then draw something else on top of
that you can't do it w/ Performer using shadow maps???

Are there plans to remove that red background clearing in future releases?

By the way do I have to set a pre/post DRAW callback to disable/enable
writing into the z buffer on each node of my background or only on the main
parent node???

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