src/libengrid/resources/misc/raysphere_coarse.dat

   1 12
   2 0.000000e+00 0.000000e+00 -1.000000e+00
   3 7.236000e-01 -5.257200e-01 -4.472150e-01
   4 -2.763850e-01 -8.506400e-01 -4.472150e-01
   5 -8.944250e-01 0.000000e+00 -4.472150e-01
   6 -2.763850e-01 8.506400e-01 -4.472150e-01
   7 7.236000e-01 5.257200e-01 -4.472150e-01
   8 2.763850e-01 -8.506400e-01 4.472150e-01
   9 -7.236000e-01 -5.257200e-01 4.472150e-01
  10 -7.236000e-01 5.257200e-01 4.472150e-01
  11 2.763850e-01 8.506400e-01 4.472150e-01
  12 8.944250e-01 0.000000e+00 4.472150e-01
  13 0.000000e+00 0.000000e+00 1.000000e+00