public double Cut(double ys, double x)
{
if (!Flipped)
{
return(x - Fortune.ParabolicCut(Edge.LeftData[0], Edge.LeftData[1], Edge.RightData[0], Edge.RightData[1], ys));
}
return(x - Fortune.ParabolicCut(Edge.RightData[0], Edge.RightData[1], Edge.LeftData[0], Edge.LeftData[1], ys));
}