Hi David, I believe the shaders are actually compiliant with GLES 2.0, but the drivers you have add they own restrictions.
Could you send me the modified files so I can review them with a view to merging them in some form. Cheers, Robert. On Thu, Jan 21, 2010 at 8:37 PM, picoflamingo <[email protected]> wrote: > Hello, > > Not sure if this has been reported so far (I couldn't find anything in the > mailing list archive). > > I have been trying to run OSG 2.9.6 in a BeagleBoard (OpenGL ES 2.0) with > partial success. Just after compiling, when running osgviewer, I got a > window with the classical OSG blue background but nothing was rendered. > Looking at the log, I found that the vertex and fragment shaders compilation > failed. > > The main problem is that the OpenGL ES 2.0 library for the BeagleBoard > expects a precision qualifier for every single declaration. This doesn't > happen in the Imagination emulator, so it has to be tried in the real HW > (AFAIK). > > I modified the ShaderGen.cpp file to include the missing qualifiers (I just > prepend highp to every single vec and mat declaration, including attributes, > uniforms and varyings). I also modify State.cpp to add the qualifier to the > different Uniforms, but I'm not sure if that had some effect. > > Finally, I just override the ShaderGen.cpp to produce a simple > vertex/fragment shader-pair just to check that it can render something, and > that worked for simple color objects (no material, no texture,...). I could > render the axis.osg and glider.osg models. > > I do not know enough about OSG internals to produce a proper patch for this, > so hope that this information could help to make OSG work in the BeagleBoard > (and probably in other OMAP3 platforms -OpenPandora, N900,..-) in the next > stable release. If I can help in any way (as tester for instance), please > just let me know. > > I was using the OSG 2.9.6 tarball, not the svn version, so if this is > already fixed, please ignore this message. > > Many thanks. > > david > -- > picoFlamingo Project: http://community.papermint-designs.com/ > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
