[osg-users] textures and shader

biv at iastate.edu biv at iastate.edu
Mon Sep 3 06:14:28 PDT 2007


 Have you checked your shader with glvalidate program from 3dlabs?what
are the warnings?these usually are important to resolve.

On 9/3/07, mfritzen at uni-koblenz.de <mfritzen at uni-koblenz.de> wrote:
> So, the notify thing is working now. I get the info logs when compiling,
> but everything seems to be fine. The glProgram links correctly, just some
> casting warnings. I really don't know why it fails. Could there be a
> problem with the gl_TextureMatrix[1] in the vertex program? What I want is
> simply to transfer the gl_TexCoords of my shadowMap to the frag program. I
> am still thankful for every hint.
>
> --marcus
>
> > Yeah, i have searched the website, but this I have not found ;) Thanks
> > Robert.
> >
> >> http://www.openscenegraph.org/projects/osg/wiki/Support/TipsAndTricks
> >>
> >> On 9/3/07, mfritzen at uni-koblenz.de <mfritzen at uni-koblenz.de> wrote:
> >>> Hi Mike,
> >>>
> >>> first thanks for your answer, but could you or someone else tell me how
> >>> to
> >>> turn on the notify level? I never worked with it.
> >>>
> >>> Thanks.
> >>>
> >>> > Hi,
> >>> >
> >>> > Turn up the notify level to retrieve the infologs for compilation and
> >>> > linking.  There could be some other error preventing creation of a
> >>> > functioning glProgram.
> >>> >
> >>> > -- mew
> >>> >
> >>> >
> >>> > Mike Weiblen -- Zebra Imaging -- Austin Texas USA --
> >>> > http://www.zebraimaging.com/
> >>> >
> >>> >> -----Original Message-----
> >>> >> From: osg-users-bounces at lists.openscenegraph.org [mailto:osg-users-
> >>> >> bounces at lists.openscenegraph.org] On Behalf Of Marcus Fritzen
> >>> >> Sent: Thursday, August 30, 2007 4:24 AM
> >>> >> To: osg-users at lists.openscenegraph.org
> >>> >> Subject: [osg-users] textures and shader
> >>> >>
> >>> >> Hello,
> >>> >>
> >>> >> I have a little problem using texture coordinates with shader. The
> >>> >> problem is, if I use a vertex program with varying for the fragment
> >>> >> program, the texture coordinates seem to be incorrect, but if I just
> >>> > use
> >>> >> the fragment program without the vertex program everything is fine.
> >>> > For
> >>> >> example when computing shadows:
> >>> >>
> >>> >> VERT
> >>> >> ...
> >>> >> vertex = gl_ModelViewMatrix * gl_Vertex;
> >>> >> gl_TexCoord[0] = gl_MultiTexCoord0;
> >>> >> gl_TexCoord[1] = gl_TextureMatrix[1] * vertex;
> >>> >> ...
> >>> >> FRAG
> >>> >> ...
> >>> >> float depth = shadow2DProj( shadowTexture, gl_TexCoord[1] ).x;
> >>> >> ...
> >>> >> this is not working. On texture unit 0 is the base texture, on 1 the
> >>> >> shadowmap. But without the vertex program it is working. Anybody any
> >>> >> hints?
> >>> >>
> >>> >> Thanks,
> >>> >> Marcus
> >>> >> _______________________________________________
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> >>> >> osg-users at lists.openscenegraph.org
> >>> >>
> >>> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or
> >>> > g
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