3      # number of polygonal chains
3 out  # first polygonal chain, with 3 points, and is the out most chain
0 0    # point 1
0 10   # point 2
10 10  # point 3
3 2 1  # the order of the polychain vertices, must be ccw
4 in   # Second polygonal chain, 43 points, and is a hole boundary
1 1    # All holes define after this must be contained inside the first boundary
2 1
2 2
1 2
1 2 3 4
4 out  # Third polychain, another out most boundary
-5 -5  # this polychian can be in any where...
-3 0
-4 3
-6 0
1 2 3 4


