public void Case1(Sink sink, Edge edge, Trapezoid[] tList)
{
YNode yNode = new YNode(edge, Sink.Isink(tList[1]), Sink.Isink(tList[2]));
XNode qNode = new XNode(edge.Q, yNode, Sink.Isink(tList[3]));
XNode pNode = new XNode(edge.P, Sink.Isink(tList[0]), qNode);
Replace(sink, pNode);
}
private void Replace(Sink sink, Node node)
{
if (sink.ParentList.Count == 0)
_head = node;
else
node.Replace(sink);
}
public Trapezoid(Point leftPoint, Point rightPoint, Edge top, Edge bottom)
{
LeftPoint = leftPoint;
RightPoint = rightPoint;
Top = top;
Bottom = bottom;
UpperLeft = null;
UpperRight = null;
LowerLeft = null;
LowerRight = null;
Inside = true;
Sink = null;
}
public void Case3(Sink sink, Edge edge, Trapezoid[] tList)
{
YNode yNode = new YNode(edge, Sink.Isink(tList[0]), Sink.Isink(tList[1]));
Replace(sink, yNode);
}