private void Add(Edge edge, int geomIndex)
{
MonotoneChainEdge mce = edge.GetMonotoneChainEdge();
int[] startIndex = mce.StartIndex;
for (int i = 0; i < startIndex.Length - 1; i++)
{
MonotoneChain mc = new MonotoneChain( mce, i, geomIndex );
SweepLineEvent insertEvent = new SweepLineEvent( geomIndex, mce.GetMinX(i), null, mc);
_events.Add( insertEvent );
_events.Add( new SweepLineEvent( geomIndex, mce.GetMaxX(i), insertEvent, mc) );
}
}