Hi Issam,
i have deleted all the OSG Folder and tried with a new one, disable the GL3
fonctionallity and it worked
btw HOW GL3 extensions make OSG Better, and should i use it ?
Ah, I didn't remember you mentioning you had built OSG with GL3
enabled... That explains it.
OpenGL 3.0 deprecated the whole fixed-function pipeline, and so most
regular models you have won't render correctly. When using OpenGL 3
(with or without OSG) you need to create shaders that implement the
effects you want to use, and most of the existing StateAttributes OSG
implemented were for the fixed pipeline, so they will give the errors
you mentioned (unable to apply state, like your Material state).
I encourage you to read up on OpenGL 3, but in the mean time, just don't
use that flag for OSG and you'll be fine, you'll have access to the
fixed pipeline and your existing models will work.
It may be that OSG will someday offer shader generation in order to make
OpenGL 3 easier to use with OSG, but for now that's the state of things,
if you use OpenGL 3 you have to do a lot of things yourself to make
things work, and if you don't use OpenGL 3 then things generally just
work from the start.
Hope this explains it,
J-S
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Jean-Sebastien Guay [email protected]
http://www.cm-labs.com/
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