Re: [Fwd: [info-performer] Detail texture on alpha texture]

From: Brian Furtaw (brian++at++sgi.com)
Date: 06/11/2002 05:18:55

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• In reply to: Andreas Ekstrand: "[Fwd: [info-performer] Detail texture on alpha texture]"

Andreas,

A couple of things. What hardware are you using? Can you make available
an example program and related texture files for testing on other
systems? Can you put a call to gluErrorString and glGetError into a
pfGeoState callback to help narrow down this problem? This would at
least insure the error message is coming from the pfGeoState which
contains the detail alpha texture. Does both the base texture and the
detail texture contain alpha? If you are on IRIX try ogldebug32 and trap
on OpenGL Error. This way you can find out what the offending OpenGL
command is?

Brian

Andreas Ekstrand wrote:
>
> Hello again!
>
> I thought I'd repeat my question, since nobody has answered it - maybe
> nobody saw it?
>
> Can I apply a detail texture on an alpha (semi-transparent) texture?
>
> /Andreas
>
> > Hi!
> >
> > I have a simple question:
> > Isn't it possible to use detail texture on an alpha texture?
> >
> > I have tried to load an FLT file created in MultiGen Creator and
> > containing a simple polygon, textured with an alpha texture and a detail
> > texture. The detail texture doesn't show and I get this error when
> > viewing the FLT file in perfly:
> >
> > PF Notice/Usage: OpenGL Error 0x501 - invalid value
> >
> > If I change the internal format of the texture from TX_RGBA_8 to
> > TX_RGB_5 the detail texture shows but the alpha is of course gone.
> >
> > Any help would be appreciated.
> >
> > Regards,
> > Andreas
> >
> > --
> > ---------------------------------------------------------
> > FDM-AE Andreas Ekstrand |E-mail: Andreas.Ekstrand++at++saab.se
> > Saab AB |Phone: +46 (0)13 - 18 40 42
> > SE-581 88 Linkoping |Fax: +46 (0)13 - 18 41 77
> > SWEDEN |
> > ---------------------------------------------------------
>
> --
> ---------------------------------------------------------
> FTM-AE Andreas Ekstrand |E-mail: Andreas.Ekstrand++at++saab.se
> Saab AB |Phone: +46 (0)13 - 18 40 42
> SE-581 88 Linkoping |Fax: +46 (0)13 - 18 41 77
> SWEDEN |
> ---------------------------------------------------------

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• Next message: Dorosky, Christopher G: "[info-performer] Bounding with switches, and pfGetCullResult"
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