From: Yair Kurzion (yair++at++polygon.engr.sgi.com)
Date: 02/22/2000 14:06:54
Hi David !
`offset' is the product of all the matrices on the path from the root of
your scene graph to the pfLOD node. In other words, this is the transformation
that Performer will apply on the pfLOD node and all the nodes under it.
pfLOD evaluation needs this matrix in order to transform the pfLOD center
to its world coordinate position before selecting the desired level of detail.
-yair
>
> Hey Performers
>
> I'm wondering how to work pfEvaluateLOD:
>
> float pfEvaluateLOD(pfLOD *lod, const pfChannel *chan,
> const pfMatrix *offset);
>
> What is the offset parameter? The manpage/manual documentation
> is nonexistant. I presume that if I use the identity matrix, it will
> use values relative to the eyepoint, exactly as the scenegraph must
> do internally.
>
> Is there a better way to find out which LOD has been chosen?
>
> Thanks,
>
> David Morgan
> Aechelon Technology
> dmorgan++at++aechelon.com
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