ply
format ascii 1.0
comment A tetrahedron
element vertex 4
property float32 x
property float32 y
property float32 z
element face 4
property list uint8 int32 vertex_indices
end_header
1.63299 -0.942809 -0.666667
0 0 2
-1.63299 -0.942809 -0.666667
0 1.88562 -0.666667
3 0 1 2
3 3 1 0
3 1 3 2
3 3 0 2