void AddEdge(PolylinePoint v)
{
if (visibilityKind == VisibilityKind.Regular ||
(visibilityKind == VisibilityKind.Tangent && LineTouchesPolygon(QVertex.Point, v)))
{
visibilityGraph.AddEdge(QVertex.Point, v.Point, ((a, b) => new TollFreeVisibilityEdge(a, b)));
}
}
private void AddVisibleEdge(Tangent t)
{
VisibilityGraph.AddEdge(visibilityGraph.GetVertex(t.Start), visibilityGraph.GetVertex(t.End));
}