LAMMPS data file for polygons: squares of edge length L: Izz = 1/6mL^2
2 atoms
2 bodies
1 atom types
0 12 xlo xhi
0 12 ylo yhi
-0.5 0.5 zlo zhi

Atoms

1 1 1 1 4 5 0
2 1 1 1 9 6 0

Bodies

1 1 19
4
1 1 2.67 0 0 0
-2 -2 0
-2 2 0
2 2 0
2 -2 0
0.5
2 1 19
4
1 1 2.67 0 0 0
-2 -2 0
-2 2 0
2 2 0
2 -2 0
0.5