Code

Point PositionInDiagram(AnchorPoint ap, DiagramNode node)
{
	var r = node.Bounds;
	return new Point(
		r.X + r.Width * ap.X / 100,
		r.Y + r.Height * ap.Y / 100);
}

int NearestAnchorPoint(DiagramNode node, bool incoming, Point point)
{
	int nearest = -1;
	double minDist = Double.MaxValue;

	for (int i = 0; i < node.AnchorPattern.Points.Count; i++)
	{
		var ap = node.AnchorPattern.Points[i];
		if (ap.AllowIncoming != incoming)
			continue;
		var pos = PositionInDiagram(ap, node);
		var dist = Utilities.Distance(pos, point);
		if (dist < minDist)
		{
			minDist = dist;
			nearest = i;
		}
	}
	return nearest;
}

void AlignEndToAnchorPoint(DiagramLink link)
{
	var destNode = link.Destination;
	var destAnchor = NearestAnchorPoint(
		destNode, true, link.StartPoint);
	if (destAnchor > -1)
	{
		link.EndPoint = PositionInDiagram(
			destNode.AnchorPattern.Points[destAnchor],
			destNode);
		link.DestinationAnchor = destAnchor;
		link.Route();
	}
}