ply
format ascii 1.0
comment A polygon and some edges containing various combinations of invalid
comment vertex indices.  These should cause displaz to discard the invalid
comment geometry and carry on loading the rest of the file.
element vertex 4
property double x
property double y
property double z
element face 3
property list int int vertex_index
element edge 6
property list int int vertex_index
end_header
0 0 0
1 1 0
2 0 0
1 2 0
4 0 1 2 3
4 -1 0 1 3
4 1 2 3 4
5 0 1 2 3 0
2 -1 1
2 0 4
2 -1000000 1
2 0 1000000
3 4 5 0
