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HeavenAgain

Fri Jun 15, 2007 10:29 am


Java Fractal

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well, i dont see any java graphics being posted on this forum, so i'll share one of "mine"  :oops: 
its not that pretty and all, but i hope it will get people started thinking about recursions, and graphics

import javax.swing.JFrame;     //imports for the frame
import java.awt.Color;         //imports the colour
import java.awt.Graphics;    //imports the graphics
import java.util.Random;  // imports the random class for random colour
public class SierpinskiSquare
{
  public static void main (String[]args)
  {
    new SFrame();  // call to the frame, program
  }
}
class SFrame extends JFrame 
{
  Graphics g;     // graphics
  Color c =Color.WHITE; // set colour to white to creat the blanks
  Random r = new Random();
  public SFrame() 
  {
    setTitle("Sierpinski Square"); // name of the window/frame
    setVisible(true); // true to show the window
    setSize(500,500); // creats the frame, starting window visible true
    //  setResizable(false); //cannot resize the frame/window     --  useless, since fratal base is on window size
    setLocationRelativeTo(null); //center the frame/window
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //exit window, omit this line to avoid annoying pop up, useless
    //   setBackground(Color.WHITE); //set background to white
  }
  public void paint(Graphics g)
  {
    this.g = g;
    repaint(); // incase if the window size is change, then "refresh" page, useless since window size never change
    drawSierpinskiSquare( 0, 0, getWidth(), getHeight());     // start recursion
  }
  private void drawSierpinskiSquare ( int x, int y ,int w, int h)
  {
    if (w>2 && h>2) //control when to stop
    {       
      int nw=w/3, nh=h/3;    // the new square's width and height
      g.setColor(c);          //random colour (default is white)
      g.fillRect ( x+nw,y+nh,nw,nh);  //draws and fill the square, bigger one
      for (int k=0;k