12 
     1 0.5 0.0  
     2 1.5 0.0  
     3 2.5 0.0  
     4 0.0 0.8660254 
     5 1.0 0.8660254  
     6 2.0 0.8660254
     7 3.0 0.8660254
     8 0.5 1.7320508
     9 1.5 1.7320508
    10 2.5 1.7320508
    11 1.0 2.5980762
    12 2.0 2.5980762