/* 
 * Recursion example: Sierpinski triangle
 * Laura Toma
 */
import javax.swing.*;
import java.awt.*;

public class Sierpinski extends JFrame {
    public static final int WINDOW_SIZE = 500; 
    public static final int THRESHOLD=3;
    public static int P1_x, P1_y, P2_x, P2_y, P3_x, P3_y;
    
    public Sierpinski() {
	super("Sierpinski"); 
	setSize(WINDOW_SIZE, WINDOW_SIZE);
	
	//set initial triangle corners. Should reset on window resize, etc.
	P1_x = (int)getSize().getWidth()/2;; 
	P1_y = 20; 
	P2_x = 20; 
	P2_y = (int)getSize().getHeight() - 20;
	P3_x = (int)getSize().getWidth() - 20; 
	P3_y = (int)getSize().getHeight() - 20;
	
	setVisible(true);
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    
    public Point getMiddle(Point p1, Point p2) {
	return new Point((int)(p1.getX() + p2.getX())/2, 
			 (int)(p1.getY() + p2.getY())/2); 
    }
    public void paint(Graphics g) {
	super.paint(g);
	sdraw(new Point(P1_x, P1_y),new Point(P2_x, P2_y), new Point(P3_x,P3_y)); 
    }
    public void sdraw(Point p1, Point p2, Point p3) {
	System.out.println("drawing:" + p1 + p2 + p3);
	//termination condition: if points are withing
	//THRESHOLD of each other, stop
	
	
	
	
	
	
	
	//else  draw the current triangle
	Graphics g = getGraphics(); 
	


	//then recursively draw the 3 smaller corner triangles
	
	
	
    }
    public static void main(String[] args) {
	Sierpinski gasket = new Sierpinski(); 			
    }
}