ply format ascii 1.0 comment created by platoply element vertex 4 property float32 x property float32 y property float32 z element face 4 property list uint8 int32 vertex_indices end_header -1 -1 -1 1 1 -1 1 -1 1 -1 1 1 3 1 2 3 3 1 0 2 3 3 2 0 3 0 1 3