import java.awt.*;
import java.awt.geom.*;
import java.lang.Math;

public class Rectangulo extends Forma
{
  Rectangulo (Point p, double w, double h)
    {
      corner = new Point2D[4];
      corner[0] =new Point2D.Double(p.getX(),p.getY());
      corner[1] =new Point2D.Double(p.getX(),p.getY()+h);
      corner[2] =new Point2D.Double(p.getX()+w,p.getY()+h);
      corner[3] =new Point2D.Double(p.getX()+w,p.getY());      
    }
  public void paintComponent(Graphics2D g2d)
    {
      for (int i=0; i<corner.length; i++)
        g2d.draw(new Line2D.Double(corner[i],
                                   corner[(i+1)%corner.length]));

    }
  public void setThirdCorner(Point p) 
    {
      corner[2] = new Point2D.Double(p.getX(),p.getY());
      corner[1].setLocation(corner[0].getX(), corner[2].getY());
      corner[3].setLocation(corner[2].getX(), corner[0].getY());      
    }
  
  public void escalar(Point center, double factor)
    {
      for (int i=0; i<corner.length; i++)
        corner[i].setLocation(center.getX()+factor*(corner[i].getX()-center.getX()),
                              center.getY()+factor*(corner[i].getY()-center.getY()));
    }
  
  public void rotar(Point center, double deltaAngulo) 
    {
      for (int i=0; i<corner.length; i++) {
        double x = corner[i].getX()-center.getX();
        double y = corner[i].getY()-center.getY();
        double distancia = Math.sqrt(x*x + y*y);
        double anguloInicial = Math.atan2(y, x);
        x = distancia*Math.cos(anguloInicial+deltaAngulo) + center.getX();
        y = distancia*Math.sin(anguloInicial+deltaAngulo) + center.getY();
        corner[i].setLocation(x, y);
      }
    }

  public void trasladar(double dx, double dy)
    {
      for (int i=0; i<corner.length; i++)
        corner[i].setLocation(corner[i].getX()+dx, corner[i].getY()+dy);  
    }

  private Point2D[] corner;
}