ply format ascii 1.0 comment VCGLIB generated element vertex 14 property float x property float y property float z element face 15 property list uchar int vertex_indices end_header 0 0 0 -0.5 1 0 0.5 1 0 -1 2 0 0 2 0 1 2 0 -1.5 3 0 -0.5 3 0 0.5 3 0 1.5 3 0 -1 4 0 0 4 0 1 4 0 0 6 0 3 0 2 1 3 1 4 3 3 1 2 4 3 2 5 4 3 3 7 6 3 3 4 7 3 4 8 7 3 4 5 8 3 5 9 8 3 6 7 10 3 7 11 10 3 7 8 11 3 8 12 11 3 8 9 12 3 10 12 13