32. KOCH CURVE

Code:

import java.awt.*;

import java.applet.*;

import java.awt.event.*;

public class KKoch extends Applet implements MouseListener

{

            int  iteration;

            int size = 20;

            public void init() 

            {

                        setBackground(Color.white);

                        addMouseListener(this) ;

                        iteration=1;

            }

            public void mouseMoved(MouseEvent e){}

            public void mouseDragged(MouseEvent e){}

            public void mouseReleased(MouseEvent e){}

            public void mouseClicked(MouseEvent e){}

            public void mouseEntered(MouseEvent e){}

            public void mouseExited(MouseEvent e){}

            void  koch(double  x1, double  y1, double  x2, double  y2,int  iteration, Graphics  g)

            {

                        if  (iteration<=1)

                        {g.drawLine ((int )x1,(int )y1,(int )x2,(int )y2);}

                        else  {

                                    double  x4=x1*2/3 + x2*1/3;

                                    double  y4=y1*2/3 + y2*1/3;

                                    double  x5=x1*1/3 + x2*2/3;

                                    double  y5=y1*1/3 + y2*2/3;

                                    double  x6=(int) (0.5 * (x1+x2) + Math.sqrt(3) * (y1-y2)/6);

                                    double  y6=(int) (0.5 * (y1+y2) + Math.sqrt(3) * (x2-x1)/6);

                                    koch(x1,y1,x4,y4,iteration-1,g);

                                    koch(x4,y4,x6,y6,iteration-1,g);

                                    koch(x6,y6,x5,y5,iteration-1,g);

                                    koch(x5,y5,x2,y2,iteration-1,g);

                        }

            }

            public void paint(Graphics  g)

            {

                        g.setColor(Color .black);

                        Dimension w = getSize();

                        koch(size*3,  w.height - size*7, w.width - size*3, w.height - size*7, iteration, g);

                        koch(w.width/2, size*2, size*3,  w.height - size*7, iteration, g);

                        koch(w.width - size*3, w.height - size*7, w.width/2, size*2, iteration, g);

            }

            public void mousePressed(MouseEvent e)

            {

                        iteration++;

                        repaint();

            }

}

/*<applet code="KKoch.class" width=600 height=600></applet>*/

/*

OUTPUT:

Need the code??

Download Link= https://www.dropbox.com/s/2odoahlmzz05t83/KKoch.docx