internal class Nodo
    {
        public Nodo(String lex, int dx, int dy)
        {
            X = dx;
            Y = dy;
            Nombre = lex;
        }

        public void Painter(Graphics g)
        {
            g.DrawImage(Image, X - 15, Y - 15);

            var drawFont = new Font("Arial", 16);
            var drawBrush = new SolidBrush(Color.Black);
            g.DrawString("" + Nombre, drawFont, drawBrush, X - 20, Y - 20);
        }

        public string Nombre { get; }

        public int X { get; private set; }

        public int Y { get; private set; }

        public void Transladar(int dx, int dy)
        {
            X += dx;
            Y += dy;
        }

        public Image Image { get; } //= Properties.Resources.esfera; //Descomentar

        public bool Haladopor(Point d) => Distance(d.X, d.Y) <= 15;

        public double Distance(int dx, int dy)
        {
            return Math.Sqrt((X - dx) * (X - dx) + (Y - dy) * (Y - dy));
        }
    }