ceph/src/boost/libs/polygon/example/input_data/primary/primary_035.txt

   1 0
   2 20
   3 100 0 95 30
   4 95 30 80 58
   5 80 58 58 80
   6 58 80 30 95
   7 30 95 0 99
   8 0 99 -30 95
   9 -30 95 -58 80
  10 -58 80 -80 58
  11 -80 58 -95 30
  12 -95 30 -99 0
  13 -99 0 -95 -30
  14 -95 -30 -80 -58
  15 -80 -58 -58 -80
  16 -58 -80 -30 -95
  17 -30 -95 0 -99
  18 0 -99 30 -95
  19 30 -95 58 -80
  20 58 -80 80 -58
  21 80 -58 95 -30
  22 95 -30 100 0