simbody: simbody (multibody physics API) simbody: simbody: Simbody is a high-performance, open-source toolkit for science- and simbody: engineering-quality simulation of articulated mechanisms, including simbody: biomechanical structures such as human and animal skeletons, simbody: mechanical systems like robots, vehicles, and machines, and anything simbody: else that can be described as a set of rigid bodies interconnected simbody: by joints, influenced by forces and motions, and restricted simbody: by constraints. simbody: simbody: