import java.awt.*;
import java.awt.image.*;
import java.net.*;

public class RippleApplet extends java.applet.Applet {
  String imageName;
	Image im, waveImage;
	public void init() {
  	int w=-1, h=-1;
	  imageName = getParameter("imageName");
		try {	im = getImage(new URL(getDocumentBase(), imageName)); }
		catch (Exception e) { System.out.println("couldn't find image"); }
		while(w == -1 |+ h == -1) {
		  w = im.getWidth(this);
		  h = im.getHeight(this);
			System.out.println("Loading image...");
		  try { Thread.sleep(1000); } catch (Exception e) { }
		}
		System.out.println("Done loading image.");
		PixelGrabber pix=null;
		try {
		  pix = new PixelGrabber(im, 0, 0, w, h, true);
		  System.out.println("Getting data.");
  		boolean b = pix.grabPixels();
  		if (!b) System.out.println("aborted...");
		}
	  catch (Exception e) { System.out.println(e); }
		int[] flatData = (int[])pix.getPixels();
		int[][] data = deflatten(flatData, w, h);
		int[][] data2 = new int[w][h];
		double r;
		for(int x=20; x<w-20; x++) {
	  	for(int y=20; y<h-20; y++) {
        r = Math.sqrt((x-w/2)*(x-w/2)+(y*2-h)*(y*2-h))/9;
			  data2[x][y] = data[x+(int)(50*Math.cos(r)/(r+1))][y+(int)(130*Math.cos(r)/(r+1))];
  		}
			if (x % 10 == 0) System.out.println("working... "+x);
		}
		flatData = flatten(data2);
		System.out.println("Making image");
		waveImage = createImage(new MemoryImageSource(w, h, flatData, 0, w));
		repaint();
	}
	
	public int[] flatten(int[][] data) {
		int w=data.length, h=data[0].length;
	  int[] flatData = new int[w*h];
	  for(int x=0; x<w; x++) {
		  for(int y=0; y<h; y++) {
  			flatData[x+w*y] = data[x][y];
			}
		}
		return flatData;
	}
	
	public int[][] deflatten(int[] flatData, int w, int h) {
	  int[][] data = new int[w][h];
	  for(int x=0; x<w; x++) {
		  for(int y=0; y<h; y++) {
  			data[x][y] = flatData[x+w*y];
			}
		}
		return data;
	}
	
	public void paint(Graphics g) {
	  if (waveImage != null) g.drawImage(waveImage, 0, 0, this);
	}
	
}