Now it's a cool toy, but there might be more practical applications for a 4D rigid body physics engine. Some materials design approaches[0] involve iterating th

Now it's a cool toy, but there might be more practical applications for a 4D rigid body physics engine. Some materials design approaches[0] involve iterating through shape space to determine what shape a particle should be to get it to assemble into a desired structure. A 4D physics engine might be useful for this shape space iteration, as movement through shape space could be accomplished by moving a 4d rigid body along the 4th axis. [0]http://pubs.acs.org/doi/full/10.1021/acsnano.5b04181 http://pubs.acs.org/doi/full/10.1021/acsnano.5b04181