import java.applet.*;
import java.awt.*;
import java.net.*;
import java.util.*;


public class Animator extends Applet implements Runnable
{
  protected int numImgs;  // number of images
  protected Image[] imgs;                // Array of 64ish images
  protected int frameNum;                  // Current frame number
  protected MediaTracker mt;
  protected Thread movieThread = null; // The thread for animation
  Movie[] cube;
  
  public class Movie
  {
    int which;  // Movie frames in chrono order: value of "which" is
                // which of the images in imgs to show for this frame
    int time;   // time for each frame to be displayed

    public Movie(int which, int time)
    {
	  this.which = which;
	  this.time = time;
    }
    public Movie()
    {
	  this.which = 0;
	  this.time = 0;
    }
  }

  public void init()
    {
      String prefix = "imgs/Untitled-";
      String suffix = ".jpg";

      numImgs = 86;
      int i,j;
      
      // _i_ goes from 2 to 87, which are the images.  imgs and the mt
      // will have 0 through 85, I guess.

      mt = new MediaTracker(this);
      imgs = new Image[numImgs];
      for(i = 2; i < numImgs+2; i++)
	{
	  imgs[i-2] = this.getImage(this.getDocumentBase(), prefix+i+suffix);
	  mt.addImage(imgs[i-2], i-2);
	}


      cube = new Movie[600];
      frameNum = 0;

      for (j=0; j<3; j++)
	{
	  //sunrise, sunset, night
	  for (i=0; i<8; i++)
	    cube[frameNum++] = new Movie(85-i,100+50*(8-i)); // 85 to 54
	  for (i=8; i<32; i++)
	    cube[frameNum++] = new Movie(85-i,100); // 85 to 54
	  for (i=0; i<26; i++)
	    cube[frameNum++] = new Movie(22+i,100); // 22 to 52
	  for (i=26; i<31; i++)
	    cube[frameNum++] = new Movie(22+i,100+20*(i-26)); // 22 to 52
	  cube[frameNum++] = new Movie(53,100*32); // 53
	}

      //sunrise
	  for (i=0; i<8; i++)
	    cube[frameNum++] = new Movie(85-i,100+50*(8-i)); // 85 to 54
	  for (i=8; i<32; i++)
	    cube[frameNum++] = new Movie(85-i,100); // 85 to 54

      //littlebounce
      for (i=0; i<4; i++)
	cube[frameNum++] = new Movie(i,f(4-i));
      for (i=4; i>0 ; i--)
	cube[frameNum++] = new Movie(i,f(4-i));

      cube[frameNum++] = new Movie(0,1000);

      //mediumbounce
      for (i=0; i<10; i++)
	cube[frameNum++] = new Movie(i,f(10-i));
      for (i=10; i>0; i--)
	cube[frameNum++] = new Movie(i,f(10-i));

      cube[frameNum++] = new Movie(0,1000);

      for (j=0; j<5; j++)
	{
	  //bigbounce
	  for (i=0; i<21; i++)
	    cube[frameNum++] = new Movie(i,f(21-i));
	  for (i=21; i>0; i--)
	    cube[frameNum++] = new Movie(i,f(21-i));
	}

      cube[frameNum++] = new Movie(0,2000);

      //littlebounce
      for (i=0; i<4; i++)
	cube[frameNum++] = new Movie(i,f(4-i));
      for (i=4; i>0 ; i--)
	cube[frameNum++] = new Movie(i,f(4-i));

      //sunset, night
      for (i=0; i<10; i++)
	cube[frameNum++] = new Movie(22+i,100+50*(10-i)); // 22 to 52
      for (i=10; i<26; i++)
	cube[frameNum++] = new Movie(22+i,100); // 22 to 52
      for (i=26; i<31; i++)
	cube[frameNum++] = new Movie(22+i,100+20*(i-26)); // 22 to 52
      cube[frameNum++] = new Movie(53,75*32); // 53

      //sunrise, sunset, night
      for (i=0; i<8; i++)
	cube[frameNum++] = new Movie(85-i,100+50*(8-i)); // 85 to 54
      for (i=8; i<32; i++)
	cube[frameNum++] = new Movie(85-i,100); // 85 to 54
      for (i=0; i<26; i++)
	cube[frameNum++] = new Movie(22+i,100); // 22 to 52
      for (i=26; i<31; i++)
	cube[frameNum++] = new Movie(22+i,100+20*(i-26)); // 22 to 52
      cube[frameNum++] = new Movie(53,100); // 53

      for (i=frameNum; i<cube.length; i++)
	cube[i] = new Movie(53,100); //why'd we run out? Impatient!
    }

public int f(int i)
    {
      return( (int)
	      (100f * ( Math.sqrt((float)(i+1)) - Math.sqrt((float)i) ) )
	      );
    }


  // Draw the current frame
  public void paint(Graphics g)
  { g.drawImage(imgs[cube[frameNum].which], 0, 0, this); }

  // Don't clear the screen before calling paint()
  public void update(Graphics g) { paint(g); }

  // Start up an animation thread
  public void start() {
    if (movieThread == null) {
      movieThread = new Thread(this);
      movieThread.start();
    }
  }

  // Stop the animation thread
  public void stop() {
    if ((movieThread != null) && movieThread.isAlive())
      movieThread.stop();
    movieThread = null;
  }

  // Thread body -- animation inside
  public void run()
    {
      // wait until all images have loaded
      for (int i = 0; i < numImgs; i++)
	{
	  this.showStatus("Loading frame " + i + " of " + numImgs);
	  try { mt.waitForID(i); } catch (InterruptedException e) {;}
	  // how did it go?
	  if (mt.isErrorID(i))
	    {
	      this.showStatus("Barfed on frame " + i + "; quitting.");
	      return;
	    }
	  frameNum = 0; //??
	}
      
      this.showStatus("Images loaded.");
      
      // Now show the animation: inc frameNum, redraw, pause
      
      while(true)
	{
	  if (++frameNum >= cube.length) frameNum = 0;
	  repaint();
	  try { Thread.sleep(cube[frameNum].time); }
	  catch (InterruptedException e) { ; }
	}
  }
}