[vtkusers] Shading/Texture Question

[Praveen Bhaniramka]

Hi Amer,

> > > easy way to texture the isosurface from the first set with the
> information
> > > from the 2nd set?
> >
> > You can use 3D texture mapping (depending on the platform you are running
> > this on, it might or might not be available) to create a 3D texture from
> > the second volume and apply it to the isosurface from the first. This will
> > work even if your isosurface (isovalue) from the first volume changes.
> 
> Can you elaborate on this a little more?  I am very new to this.  If you can
> give me the names of the functions used to create the texture map, that
> would be helpful.  I will be running this on Redhat Linux. 

First check if your machine supports 3D texture mapping using the
following command -

% glxinfo | grep EXT_texture3D 

If yes, you can do this directly using OpenGL... see man glTexImage3d,
glTexParameter, glTexGen.

If not, use the other method of computing the per-vertex color values from
the second volume and render the isosurface using those values.

hth,
Praveen

-- 
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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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