[osg-users] textures and shader

Robert Osfield robert.osfield at gmail.com
Mon Sep 3 02:10:42 PDT 2007


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
> >> _______________________________________________
> >> osg-users mailing list
> >> osg-users at lists.openscenegraph.org
> >>
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or
> > g
> > _______________________________________________
> > osg-users mailing list
> > osg-users at lists.openscenegraph.org
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
>
>
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