-3 -3 10
-1 -0.5 4
-0.3 0.9 0.6
0.9 0.75 1.1

#-2 2.4 5.4
#-0.2 1.21 1.7
#0.5 1.22 1.65
#1.2 1.21 1.7
#3 2.4 5.4

#-3.158472 2.926414 7.990301
#-0.097193 1.195776 1.627851
#0.231698 0.707630 -0.012869
#1.961033 1.648414 3.387254