ply
format ascii 1.0
element vertex 4
property float32 x
property float32 y
property float32 z
element face 4
property list uint8 int32 vertex_indices
end_header
1 -0.866028 -0.816498
0 -0.288676 0.816498
-1 -0.866028 -0.816498
0 0.866028 -0.816498
3 2 1 0
3 0 1 3
3 2 3 1
3 2 0 3