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akanazawa / hmr

Project page for End-to-end Recovery of Human Shape and Pose
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why use axis-angle to represent rotation #138

Open ffiioonnaa opened 4 years ago

ffiioonnaa commented 4 years ago

Hi, I have a question that why smpl choose axis-angle representation? Cause I find I can't rotate the part to a position that I want by giving angles, why don't use euler angle?

longbowzhang commented 4 years ago

I guess what you would like to achieve is reffered to as inverse kinematics, basically from positions to the joints angles. I suppose it has nothing to which representation one uses for the rotation