Re: POinter to coordinate list

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Brian Furtaw (brian++at++sgi.com)
Tue, 14 Jan 1997 10:32:46 -0500

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You can use the getAttrLists method of pfGeoSet which gives you a pointer to
the desired data if you change the information the pointer is pointing to it
will cahnge in the scene. If you are using a multiprocess model for performer
(APP_CULL_DRAW) you will want to use pfCycleBuffer's for the data you are going
to update in the pfGeoSet.

Here is some sample code I put into my updateSim() routine to generate a
dynamic surface.

...
static pfGeoSet *ocean;

    if(doOnce) {
       doOnce = False;
       pfGeode *temp = (pfGeode *)
               ViewState->scene->find("virtOcean", pfGeode::getClassType());
       ocean = temp->getGSet(0);

...
}
...

#ifdef CYCLEBUFFERS
    pfCycleBuffer *coords;
#else
    pfVec3 *coords;
#endif
    pfVec3 *norms;
    ushort *n_ilist;
    ushort *vertexlist;
    ocean->getAttrLists(PFGS_COORD3, (void **)&coords, &vertexlist);
    ocean->getAttrLists(PFGS_NORMAL3, (void **)&norms, &n_ilist);

Brian

On Jan 14, 9:12am, Ming Wah wrote:
> Subject: POinter to coordinate list
>
> Hi all,
> Does anyone know how to query a GEoSet and put a pointer to the
> list of coordinates? Can these coordinates be changed during simulation
> (update of position)?
>
>
> THanks!!!!
>
> Jon
>
>
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Brian Furtaw  (brian++at++sgi.com)	
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