Hi Robert,
there is currently some unoptimized code in the osg.
If one do specify for example 10 texture attributes
for a stateset like this:
stateset->setTextureAttribute(i, new
osg::Texture2D());
and after some time you remove this attributes, there
is still an unneccessary call to glActiveTexture. So
the OpenGL calls afterwards are looking like this:
glBlah
glBlah
glActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE1);
glActiveTexture(GL_TEXTURE2);
...
glActiveTexture(GL_TEXTURE9);
glBlah
glBlah
Even if this don't break any functionality it is just
an unneeded pipeline state change, which can be
removed I think.
The problem is maybe in the PositionStateContainer,
because this is the only one which do set texture
active unit based on some lists. I'll try to track
down this and maybe provide some optimization patch
later. Or you can just take a look by yourself.
Best regards,
Art
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