# type topo
# cell     1.500000     1.500000     1.000000    90.000000    90.000000   120.000000
2
  1 v     -0.000075    0.866069    0.250000   0                              2/3       2/4      2/16      2/15      2/13      2/12      1/14      1/12 
  2 v      0.750075    0.432969    0.750000   0                             1/23      1/22      1/10      1/11      1/13      1/14      2/14      2/12