public void InsertPoint(Edge2 edge, Point2 point)
{
int edgeAndPointIndex = _edges.IndexOf (edge);
if (edgeAndPointIndex < 0)
return;
Point2 nextPoint = edge.GetNextPoint2 ();
Edge2 newEdge = new Edge2 (point, nextPoint);
edge.SetNextPoint2 (point);
point.SetEdges (edge, newEdge);
nextPoint.SetPrevEdge (newEdge);
_edges.Insert (edgeAndPointIndex + 1, newEdge);
_points.Insert (edgeAndPointIndex + 1, point);
Point2 prevPoint = edge.GetPrevPoint2 ();
prevPoint.Update (false);
point.Update (false);
nextPoint.Update (false);
UpdateBounds ();
}