/      a      b       c
   9
       1.0    0.0     0.0
       1.5    0.0     0.0
       0.7    0.0     0.0
       1.0    1.0     0.0
       1.5    1.0     0.0
       0.7    1.0     0.0
       1.0   -1.0     0.0
       1.5   -1.0     0.0
       0.7   -1.0     0.0