model://ground_plane model://sun 0 0 0.5 0 0 0 1 0 0 1 0 1 1.0 1 1 1 1 1 1 0 0.5 2.0 0 0 0 1 0 0 1 0 1 1.0 1 1 1 1 1 1 0 0 1 0 0 0 body2 body1 0 0 1 true