Structure get_box_lengths(positions) ¶ Compute lengths of box edges get_box_vectors(positions) ¶ Vectors of box edges. PARAMETER DESCRIPTION positions Atomic cartesian coordinates. TYPE: NDArray[float64] RETURNS DESCRIPTION NDArray[float64] Box vectors. get_box_volume(positions) ¶ Volume of box. PARAMETER DESCRIPTION positions Atomic cartesian coordinates. TYPE: NDArray[float64] RETURNS DESCRIPTION float Volume of structures in universe. get_com(universe) ¶ Compute the center of mass