public Rational CycleArea()
{
Rational twiceSignedArea = 0;
VecRat2 origin = Origin.Position;
foreach (DCEL_HalfEdge halfEdge in CycleNext)
{
twiceSignedArea += GeomAid.TriangleTwiceSignedArea(origin, halfEdge.Origin.Position, halfEdge.Destination.Position);
}
return(Rational.Abs(twiceSignedArea) / 2);
}
public static VecRat2 AbsoluteDifference(VecRat2 u, VecRat2 v)
{
return(new VecRat2(Rational.Abs(u.X - v.X), Rational.Abs(u.Y - v.Y)));
}
public static Rational ManhattanDist(VecRat2 u, VecRat2 v)
{
return(Rational.Abs(u.X - v.X) + Rational.Abs(u.Y - v.Y));
}
public static Rational TriangleTwiceArea(VecRat2 a, VecRat2 b, VecRat2 c)
{
return(Rational.Abs(TriangleTwiceSignedArea(a, b, c)));
}
