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
-5.0 0.0 0.0
-2.5 2.5 0.0
2.5 2.5 0.0
5.0 0.0 0.0
3 0 1 2 
3 0 2 3 
