ply
format ascii 1.0
element vertex 4
property float32 x
property float32 y
property float32 z
element face 2
property list uint8 int32 vertex_indices
end_header
0 5  0 
10 0  0 
-10 0 0 
0 -5  0 
3 0 2 1
3 3 1 2




