public void Build()
{
//htree.Clear();
htree = new TreeDictionary <double, ISorted <Edge <T> > >(dc);
TreeSet <Edge <T> > vtree = new TreeSet <Edge <T> >(lc);
double lastx = Double.NegativeInfinity;
foreach (KeyValuePair <EndPoint, Edge <T> > p in endpoints)
{
if (dc.Compare(p.Key.x, lastx) > 0)
{
//Put an empty snapshot at -infinity!
htree[lastx] = (ISorted <Edge <T> >)(vtree.Snapshot());
lc.X = lastx = p.Key.x;
lc.compareToRight = false;
}
if (p.Key.start)
{
if (!lc.compareToRight)
{
lc.compareToRight = true;
}
Debug.Assert(vtree.Check());
bool chk = vtree.Add(p.Value);
Debug.Assert(vtree.Check());
Debug.Assert(chk, "edge was not added!", "" + p.Value);
}
else
{
Debug.Assert(!lc.compareToRight);
Debug.Assert(vtree.Check("C"));
bool chk = vtree.Remove(p.Value);
Debug.Assert(vtree.Check("D"));
Debug.Assert(chk, "edge was not removed!", "" + p.Value);
}
}
lc.compareToRight = true;
htree[lastx] = (TreeSet <Edge <T> >)(vtree.Snapshot());
built = true;
}