ply format ascii 1.0 element vertex 8 property float32 x property float32 y property float32 z element face 6 property list uint8 int32 vertex_indices end_header 1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 1 1 -1 -1 -1 -1 -1 -1 -1 1 4 2 3 0 1 4 5 1 0 4 4 1 5 6 2 4 3 2 6 7 4 7 4 0 3 4 5 4 7 6