On Jun 25, 2010, at 6:42 AM, Mathias Fröhlich wrote: > With that proposal - espcially the StateAttribute::compose call working > directly on the osg::State - I conclude that we need to relink during draw: > * we will probably loose state sorting for the shader combinations > * shaders need to be at least relinked on every state change which will have > some runtime (drawtime) overhead.
Actually, I was thinking of something more sophisticated: Use shader linking and/or conditional compilation/string concatenation for shaders that are defined ahead of time. Use conditional if/then statements for attributes that are declared as dynamic. That way you can sort on the shader, just set the uniforms (including the ones used for conditional switches) per use, and you also minimize re-compilation and/or re-linking. This should probably be selectable back-end behavior, in the same way that display lists are now. Bruce _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
