//dhaval adjoadh dhaval@mit.edu Section 12 Pierre Ghisbain
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.*;
import javax.swing.*;

public class ball extends JPanel implements ActionListener
{
	private double x = 0.0;
	private double y = 260.0;
	private double xvel = 5.0;
	private double yvel = -30;
	private int tx, ty = 0;
	private Timer timer; 
	
	
    public static void main( String[] args )
    {
        JFrame frame = new JFrame( "Ball drop" );
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        frame.getContentPane().add( new ball(), "Center" );        
        frame.setSize( 700, 300 );
        frame.setVisible( true );        
    }
    
    public ball()
    {
        setBackground( Color.black );
        timer = new Timer(100, this);
        timer.start();
        
    }
    
	public void actionPerformed(ActionEvent e){		
		repaint();
		tx = tx + 1;
		ty = ty + 1;
		if (y >= 261.0){
			ty = 0;
			yvel += 5.0;
		}
		
	}   
	
	
    public void paintComponent( Graphics g )
    {
        super.paintComponent( g );
        Graphics2D g2 = (Graphics2D) g;
        Shape Ellipse = new Ellipse2D.Double(x, y, 10.0, 10.0);
        g2.setPaint(Color.white);
        g2.fill(Ellipse);
        
        GeneralPath path = new GeneralPath();
        g2.setPaint(Color.blue);
        g2.setStroke(new BasicStroke(8));
        path.moveTo(0,260);

        
        x = xvel*tx;
        y = 260 + yvel*ty  + 1*ty*ty;
        
        
//        path.lineTo(x,y);
//        g2.draw(path); 

        
        
        
        
    }
}