public static Polygon VectorListsToPolygon(List <List <Vec2> > lists)
{
Polygon p = new Polygon(lists.Count);
int index = 0;
foreach (List <Vec2> list in lists)
{
p.SetContour(index, Vec2d.FromVec2List(list));
p.SetHole(index++, false);
}
return(p);
}