Re: Re: [info-performer] pfVolume and lookup table

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From: Simone Herrmann (sim_her++at++web.de)
Date: 06/10/2003 01:53:00

Hi Praveen,

I tried this and now my volume volume is not visible any more.
What happened?

Praveen Bhaniramka <praveenb++at++mrcoffee.engr.sgi.com> schrieb am 09.06.03 18:44:52:
>
> Hi Simone,
>
> The various parameters attached to the shape's appearance are used by the
> shader, which uses them to do the actual shading (in your case applying a
> lookup table). So, adding new parameters will only have any effect if the
> corresponding shader _uses_ these parameters.
>
> In short, update the shader for the shape's appearance to use the
> TMLUTShader, which would then apply the lookup table.
>
> vzTMLUTShader *newShader = new vzTMLUTShader();
> vol->getShape()->getAppearance()->setShader(newShader);
>
> Cheers,
> Praveen
>
> On Mon, 9 Jun 2003, Simone Herrmann wrote:
>
> > Hi,
> >
> > How can I apply a lookup table to a volume in the pfVolume node?
> >
> > I tried:
> >
> > vzParameterLookupTable* myTable = myLoadLookupTable();
> >
> > pfVolume* vol = new pfVolume;
> > vol->readFile("myVolume.vz");
> > vol->getShape()->getAppearance()->setParameter("lookup_table", myTable);
> >
> > but the image still remains uncoloured.
> >
> > Thanks,
> > Simone
> > ______________________________________________________________________________
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>
> --
> -----------------------------------------------------------------
> Praveen Bhaniramka Member of Technical Staff (MTS)
> praveenb++at++sgi.com Advanced Graphics Division
> (650)933-1785 Silicon Graphics, Inc.
> -----------------------------------------------------------------

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