public Sector(Circle2D circle2D, Point2D start, Point2D finish) : this()
{
if (PointOnCircle(start, circle2D) && PointOnCircle(finish, circle2D))
{
Finish = finish;
Start = start;
Circle = circle2D;
Angle = new Triangle2D(Circle.Center, Start, Finish).AngleA;
if (double.IsNaN(Angle.Radian))
Angle = Angle.Zero;
return;
}
throw new Exception("Не возможно создать сектор");
}
private static bool PointOnCircle(Point2D point, Circle2D c)
{
const double epsilon = 0.000001;
double actualyR = point.GetDistanceTo(c.Center);
return (actualyR < c.R + epsilon && actualyR > c.R - epsilon);
}