3 3 1 GtsSurface GtsNFace GtsNEdge GtsNVertex
0 0 1 D
0.197173 6.16548e-16 0.980369 E
0.0609297 0.187522 0.980369 F
1 2 DE
2 3 EF
1 3 FD
1 2 3 DEF