ply
format ascii 1.0
comment Flyfish Viewer demo PLY
element vertex 4
property float x
property float y
property float z
element face 4
property list uchar int vertex_indices
end_header
0 1 0
-1 -1 0
1 -1 0
0 -1 1
3 0 1 2
3 0 2 3
3 0 3 1
3 1 3 2