ply
format ascii 1.0
comment VCGLIB generated
element vertex 8
property float x
property float y
property float z
element face 8
property list uchar int vertex_indices
comment Self-intersection su 4 facce
end_header
0 0 0
1 0 0
0 0 1
1 0 1
0 1 1
0 1 0
1 1 1
1 1 0
3 0 1 2
3 2 1 3
3 3 4 1
3 4 1 5
3 5 4 6
3 5 6 7
3 0 2 6
3 0 6 7