BezierFitting.Scene.HitTest C# (CSharp) Метод

        public int HitTest(double x, double y)
        {
            double dx, dy;
            double v, min = double.MaxValue;
            int r = 0;

            dx = x - CurrentBezier.Point1.X;
            dy = y - CurrentBezier.Point1.Y;
            v = dx * dx + dy * dy;
            if (v <= radius_s && v <= min)
            {
                min = v;
                r = 1;
            }

            dx = x - CurrentBezier.Point2.X;
            dy = y - CurrentBezier.Point2.Y;
            v = dx * dx + dy * dy;
            if (v <= radius_s && v <= min)
            {
                min = v;
                r = 2;
            }

            dx = x - CurrentBezier.Point3.X;
            dy = y - CurrentBezier.Point3.Y;
            v = dx * dx + dy * dy;
            if (v <= radius_s && v <= min)
            {
                min = v;
                r = 3;
            }

            dx = x - CurrentBezier.Point4.X;
            dy = y - CurrentBezier.Point4.Y;
            v = dx * dx + dy * dy;
            if (v <= radius_s && v <= min)
            {
                min = v;
                r = 4;
            }

            return r;
        }