import java.util.*;
import java.awt.*;
import java.awt.geom.*;


public class BallView {
   private Color color = Color.GREEN;
   private Ellipse2D.Double shape = null;
   private Ball ball;
   private final double radius;
   
   public BallView (Ball b, double r){
      ball=b;
      radius = r;
      Vector2D pos = b.getPosition();
      shape = new Ellipse2D.Double(pos.getX()-radius, pos.getY()-radius, 2*radius, 2*radius);
   }
   void paint(Graphics2D g) {
      Vector2D pos = ball.getPosition();
      shape.setFrame(pos.getX()-radius, pos.getY()-radius, 2*radius, 2*radius);
      g.setColor(color);
      g.fill(shape);
   }
}