//Sticks.java

import java.awt.*;
import javax.swing.*;

public class Sticks extends JApplet { 

    int count;
	    
    public void init() {
	String input;
	
	input = JOptionPane.showInputDialog( "Enter number of points");
    	count = Integer.parseInt( input );
    }
    
    public void paint (Graphics g) {
	
	//first random point
	int x1=(int)(Math.random()*getWidth());
	int y1=(int)(Math.random()*getHeight());
	//"remember" original first point 
	int startx = x1;
	int starty = y1;
	int x2, y2;
	double len, sumLen=0, avgLen;
	double sumDistStart=0, distStart, avgDistStart;
	for (int i=1; i<count; i++) {
	    //get next endpoint
	    x2=(int)(Math.random()*getWidth());
	    y2=(int)(Math.random()*getHeight());
	    
	    g.drawLine(x1,y1,x2,y2);
	    len = Math.sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2));
	    sumLen += len;
            distStart = Math.sqrt((x2-startx)*(x2-startx) + (y2-starty)*(y2-starty));
            sumDistStart += len;
	    //reset x1 y1 to endpoint, will be startpoint of next line
	    x1 = x2;
	    y1 = y2;	        
	}
	//after the loop, draw back to original start
	g.drawLine(x1,y1,startx,starty);

        len = Math.sqrt((x1-startx)*(x1-startx) + (y1-starty)*(y1-starty));
        sumLen += len;
	avgLen = sumLen / count;
	avgDistStart = sumDistStart / count;
	g.setColor(Color.RED);
        g.setFont( new Font( "Serif", Font.BOLD, 16 ) );	
	g.drawString("Avg len: " + avgLen,0,20);	
	g.drawString("Avg dist start: " + avgDistStart,0,40);	
	showStatus("Avg len: " + avgLen + "  Avg dist start: " + avgDistStart);	
   }
} 
/* unconnected.
blob at start.
 next point within radius r of current endpoint. x2,y2
 average distance of line.  average distance from start.
 */