Moves the body along the vector rel_vec. The body will stop if it collides. Returns a KinematicCollision, which contains information about the collision. If test_only is true, the body does not move but the would-be collision information is given.
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Moves the body along the vector rel_vec. The body will stop if it collides. Returns a KinematicCollision, which contains information about the collision. If test_only is true, the body does not move but the would-be collision information is given.