Re: [info-performer] pfVolume and lookup table

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From: Praveen Bhaniramka (praveenb++at++mrcoffee.engr.sgi.com)
Date: 06/09/2003 09:44:27

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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-- 
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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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