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