The Intel GMA series (945, ...) is notorious for not supporting OpenGL 2.0, and being stuck at the level of ARB vertex and fragment shaders (assembly language shaders, yummy)
Okay, it's a bit older than 5 years. Christian 2015-01-28 13:24 GMT+01:00 Sebastian Messerschmidt < sebastian.messerschm...@gmx.de>: > Am 28.01.2015 um 13:11 schrieb Christian Buchner: > > the idea is to have a bumpmapped OSG object that displays fine on older > hardware (5 year old Intel chips, I am looking at you) > > Which one exaclty? Which OpenGL version supported? > I'v started shader programming like 2004/05 on a GeForce 4400 Ti, so > chances even the older Intel chips support fragment shaders is high. > > Cheers > Sebastian > > > > > Then I can put a better GLSL fragment shader on top if the hardware > permits. > > Christian > > > 2015-01-28 12:30 GMT+01:00 Sebastian Messerschmidt < > sebastian.messerschm...@gmx.de>: > >> Hi Christian >> >> Hi all, >> >> I was wondering if there are commonly used conventions which texture >> units do what in 3D models used for realtime rendering (games etc). >> >> For example I see that most 3D models enable texture unit #1 for the >> diffuse texture, whereas unit #0 is unused most of the time. >> >> Now what if the model also contained a bump or normal map? On which >> texture unit would such maps typically use? >> >> Would anyone have an example OSG file that uses both a diffuse and a >> normal texture, rendered with the fixed function pipeline? I am trying to >> get started with normal maps now and this would be a big help, especially >> if such a model follows the usual conventions. >> >> Why would you want to use fixed function pipeline here at all? >> Usually you can put the textures to whatever unit you want, as long as >> you create sampler uniforms with a name. >> >> In my production pipeline, I don't have the additional textures (normal >> map, specular map, height map, emission map, ...) in the model, but will >> bind them with a visitor when loading/compiling the model. >> So there is no typical for most of the cases. If you have a model >> exported as FBX for instance, the loader will more or less determine the >> texture unit used. Here you might want to visit the model and put the >> stateset's textures to the samplers. >> >> Cheers >> Sebastian >> >> >> Christian >> >> >> >> >> >> _______________________________________________ >> osg-users mailing >> listosg-users@lists.openscenegraph.orghttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> > > > _______________________________________________ > osg-users mailing > listosg-users@lists.openscenegraph.orghttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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