public override double GetLength(double t0, double t1)
{
double a0 = this.GetAngle(t0);
double a1 = this.GetAngle(t1);
return(AngleUtils.Diff(a0, a1) * this.Radius);
}
public static double AngleBetween(double aX, double aY, double bX, double bY, double cX, double cY)
{
double a1 = AngleBetween(bX, bY, aX, aY);
double a2 = AngleBetween(bX, bY, cX, cY);
return(AngleUtils.Diff(a1, a2));
}
// angle ABC
public static double AngleBetween(Coordinate2 <double> a, Coordinate2 <double> b, Coordinate2 <double> c)
{
double a1 = AngleBetween(b, a);
double a2 = AngleBetween(b, c);
return(AngleUtils.Diff(a1, a2));
}
// angle ABC
public static double AngleBetween(Point2 <double> a, Point2 <double> b, Point2 <double> c)
{
return(AngleUtils.Diff(AngleBetween(b, a), AngleBetween(b, c)));
}