/// <summary>
/// otestuje zda prislusny bot lezi na oblouku
/// </summary>
/// <param name="pt">testovany bod</param>
/// <returns></returns>
public bool IsPointOn(Point pt)
{
Circle2D?c = GetAngles(out double st, out double an);
if (c == null)
{
return(false);
}
if (!Funcs2D.Distance(pt, c.Value.Center).IsEqual(Math.Abs(Radius)))
{
return(false);
}
st = Funcs2D.PureRadianAngle(st);
double angle = Funcs2D.LineAngle(c.Value.Center, pt);
if (an > 0)
{
an = st + an;
return(angle.IsGreaterOrEqual(st) && angle.IsLesserOrEqual(an));
}
else
{
an = st + an;
return(angle.IsGreaterOrEqual(an) && angle.IsLesserOrEqual(st));
}
}
public static double[] AnglesCrossLine(Point centre, double r, Point pt1, Point pt2)
{
Point t = Funcs2D.PointToLine(pt1, pt2, centre);
if (Funcs2D.IsEqual(t, centre))
{
double an = Funcs2D.LineAngle(pt1, pt2);
return(new double[] { Funcs2D.PureRadianAngle(an + Math.PI), an });
}
double z = Funcs2D.Distance(centre, t);
double a = Funcs2D.LineAngle(centre, t);
if (z.IsGreater(r))
{
return(null); // mimo
}
if (z.IsEqual(r)) // tecna
{
return(new double[] { a });
}
//secna
double aa = Math.Acos(z / r); // uhel pulky tetivy
return(new double[] { Funcs2D.PureRadianAngle(a + aa), Funcs2D.PureRadianAngle(a - aa) });
}