From: Dave Akers (dla@engr.sgi.com)
Date: 09/12/2000 13:22:35
Hi Manfred,
As you would expect, the texture format has nothing to do with the texture
coordinate generation, so I'm not sure what could be going on. Can you
reproduce the result using the voglMultiVolume simple example? Are you
using the same brick sizes for each of the volumes that you load?
Dave
On Tue, 12 Sep 2000, Manfred Weiler wrote:
> Hi Volumizers,
>
> I have experienced some strange effects in OpenGL Volumizer.
> I was trying to render two appearances using the same geometry.
> It works fine if the different appearances share the same
> texture format. Now I try the same with different formats:
> a Lum/Alpha and a RGBA-Texture constructed from the same data set.
> When switching between these two textures I recognize a slight offset
> and one border of the Volume seems to have sensless values as if the
> texture coordinates where not properly set.
>
> I tried the V3F vertex format with texgen and the T3F_V3F format
> both with the same effect. Also skipping appearance and geometry
> optimization doesn't have any effects. I am quite sure that
> polygonization and drawing of the polygons are done with the
> right brickset.
>
> I'm using OpenGL Volumizer 1.2 on Octane MXE.
>
> Can anyone think of a reason for the described effect?
> Has anyone succeeded in a similar task?
>
> Thanks in advance
>
> Manfred.
>
> --
> ======================================================================
> Manfred Weiler Manfred.Weiler@informatik.uni-stuttgart.de
> Visualisierung und Interaktive Systeme Telefon: 0711/7816-208
> Universitaet Stuttgart, IfI FAX: 0711/7816-340
>
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