Re: [info-performer] Indexed pfGeoSet problem

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From: Benedikt Kessler (bjk++at++sgi.com)
Date: 10/13/2005 06:41:27

Hi!

Right at the beginning of the DESCRIPTION part of the pfGeoSet mapage you will find the answer:

          An indexed pfGeoSet uses a list of unsigned shorts to index
        an attribute list.

So that will allow indixes up to 65535.

Bye! Benedikt

Raymond Chen wrote:
>
> Hi everyone,
>
> I recently ran into a problem on indexed GeoSets.
> In my application, I tried to build a triangular surface mesh model
> using indexed GeoSet.
> I used pfGeoSet::setAttr() to set the vertex array and the index array.
> The vertex array and index array are built in the Shared Arena using the
> external mesh data. The number of vertices is around 210k, but not every
> vertex is used to build the triangular mesh.
> However, when I rendered the mesh data in Performer, there are many
> empty triangular faces that are not supposed to be there. It seems that
> the index into the vertex list is incorrect.
> But when I put the same data set into an Inventor model file and then
> load it into Performer using pfdLoadFile(), those empty patches
> disappeared and the surface mesh is rendered correctly.
> Does anyone here know what went wrong in my setup?
>
> Or is there an upper limit for the number of vertex that could be loaded
> into one pfGeoSet?
>
> Or do those non-used vertex in an indexed GeoSet affect the mesh
> surface?
>
> Thanks.
>
> Raymond
>
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