Hi Wojtek, Thank you so much for the response.
Just for reference, the modifications I've made in my glsl shaders to get it running on ATI were mainly the following: - only index texture coordinates with constants, variables (even const) don't seem to work. - ensure all variables are initialized (sloppy on my part) - hardcode to light 0, the accumulation loop did not work. - don't use gl_FrontMaterial / gl_BackMaterial, as the values didn't work as they did with nVidia, and produced unexpected values. - don't use gl_FrontLightModelProduct, same reason as previous. I'm not using alpha in a nonstandard way (at least not intentionally), and I don't use discard for anything. That's good information though, and I will fiddle around with my shaders to see if they have any impact (although with the NULL program, they shouldn't be used, eh?). So having said that, the use of a NULL program indeed does seem like it should be valid, as specified in the OpenGL 21.20061201 spec (p. 75), and indeed OSG does call glUseProgram(0), which should revert to fixed function. So this is a driver bug, right? Still, I agree it might be useful to let the user provide a Program to use, or whether to attach the NULL program. I ran osgshadow on the ATI 4670 with the 10.7 drivers, and I'll post the results below. I'm also attaching a screenshot of the vehicle in osgviewerWX, which seems to be having some texture coordinate issues (again, fine on nVidia). Hmm, even the osg cow seems wrong. I don't know precisely what the Texture Matrix fix is that you're speaking about, but I can poke around the forums and see if I find the issue. And by the way, thanks for the lispsm submission, it's really well done! Thanks Baker Searles ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30355#30355 Attachments: http://forum.openscenegraph.org//files/osgcow_504.jpg http://forum.openscenegraph.org//files/osgviewerwx_coupe_325.jpg http://forum.openscenegraph.org//files/osgshadow_4_stsm_369.jpg http://forum.openscenegraph.org//files/osgshadow_4_lispsm_133.jpg _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
