ply
format ascii 1.0
comment VCGLIB generated
element vertex 5
property float x
property float y
property float z
element face 4
property list uchar int vertex_indices
end_header
-1 -1 0 
 1 -1 0 
 1  1 0 
-1  1 0 
0 0 0
3 0 1 4 
3 1 2 4
3 2 3 4
3 3 0 4