or download this
my @points = ([1.0, 4.0], [2.3, 0.7], [3.6, 6.0],
[4.0, 3.6]);
...
[a, b, c, 2, 3],
[a, b, c, 2, -1],
[a, b, c, 3, -1]);
or download this
my @points = ([1.0, 4.0],
[2.3, 0.7],
...
[0, 1, 2, 5, 6, 8], # Poly 0 edges
[1, 4, 5], # Poly 1 edges
[2, 6, 7] ); # Poly 2 edges