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yes, it is a world transformation matrix. My problem was that the setRotation matrix take a 4x4 matrix and i didn't know how to build it by the 3x3 matrix i could take from the physic object.

however thx a lot for your help and actually you answeard a lot of my question with this last answear.

I read something about the world transformation but i couldn't understand how all the information could be stored just in one matrix.

however thx a lot for your help and actually you answeard a lot of my question with this last answear.

I read something about the world transformation but i couldn't understand how all the information could be stored just in one matrix.