// Code by Sergio Fanchiotti (c) 1997
//
// Free to use and copy for any purpose.
//
// No responsability for any mis-use or problems 
// due to the usage of this code on any device.
// (i.e. crashing your browser and/or your OS)
//

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

public class UFO_Attack extends Applet implements Runnable {

	Image buffer   = null ;	// Temporary image buffer
	Image backdrop = null ; // Backdrop image 
	Image bgimg    = null ; // Original backdrop  image 
	Image ufostrip = null ;	// UFO Sequence
	Image missile  = null ; // Misile Sequence
	Image missile_explosion
	               = null ; // Misile Esplosion Sequence

	MediaTracker tracker = null ;

	Graphics  buf_g = null ; // Buffer graphics object
	Graphics  bkd_g = null ; // Backdrop graphics object
	Dimension window_size = null;
	Font font ;
	Font font_s ;
	
        AudioClip explosion       = null ;
        AudioClip newufo         = null ;
        AudioClip missile_launch = null ;

	
        Thread  game      = null ;
	boolean game_over = true ;
	int     mouse_x   = 100 ;
        Rectangle paint_area = new Rectangle() ;
        Rectangle new_area   = new Rectangle() ;


	Launcher L  = null ;
	Missile  M  = null ;
	Vector   UV = new Vector() ;
	Vector   EV = new Vector() ;
	
        int NU    = 1 ;
	int score = 0 ;
	
	// Colors
	Color gunColor;
	Color mColor;
	Color ufoColor;
	Color scoreColor;
	Color bgColor;
	
	public void init() {
	  System.out.println("UFO Attack: A game by Sergio Fanchiotti") ;
	  tracker = new MediaTracker(this) ;

          bgimg = getImage(this.getCodeBase(),"bgimg.gif") ;
	  tracker.addImage(bgimg,0) ;

          ufostrip = getImage(this.getCodeBase(),"ufostrip.gif") ;
	  tracker.addImage(ufostrip,0) ;

          missile  = getImage(this.getCodeBase(),"missile.gif") ;
	  tracker.addImage(missile,0) ;

          missile_explosion = getImage(this.getCodeBase(),"explosionstrip.gif") ;
	  tracker.addImage(missile_explosion,0) ;

	  font   = new Font("Helvetica", Font.BOLD, 24) ;
	  font_s = new Font("Helvetica", Font.BOLD, 14) ;

          // Define the colors to use
	  bgColor    = new Color(0,0,128);
	  gunColor   = new Color(0,88,0);
	  mColor     = new Color(255,255,255);
	  ufoColor   = new Color(255,0,0);
	  scoreColor = new Color(0,0,255);
	}


	public void start() {
	  // Change the cursor
	  getFrame(this).setCursor(Frame.CROSSHAIR_CURSOR) ;


	  window_size = size();

	  buffer = null;
 	  buffer = createImage(window_size.width, window_size.height);

	  backdrop = null;
 	  backdrop = createImage(window_size.width, window_size.height);

	  buf_g = buffer.getGraphics();
	  buf_g.setColor(bgColor);
	  buf_g.fillRect(0, 0, window_size.width, window_size.height);


          // Display initial message
          set_say_font(font) ;
          set_say_mode(CENTER) ;
          set_say_style(SHADOW) ;
	  say("UFO",10,80) ;
	  say("ATTACK") ;
          set_say_font(font_s) ;
          set_say_style(NORMAL) ;
	  say("") ;
	  say("Click to start") ;
	  say("a game") ;

	  //repaint() ;
	  Graphics g = getGraphics() ;
          g.drawImage(buffer,0,0,this) ;

          // Initialize the launcher
	  mouse_x = window_size.width/2 ; 
          L = new Launcher(this) ;
          L.set_color(gunColor) ;

          // Initialize the missile
          M = new Missile(this) ;
          M.set_color(mColor) ;
		

          // Load the sound files now
	  if (explosion == null) 
	    explosion = getAudioClip(getCodeBase(),"explosion.au") ;

	  if (newufo == null) 
	    newufo    = getAudioClip(getCodeBase(),"sonar.au") ;

	  if (missile_launch == null) 
	    missile_launch = getAudioClip(getCodeBase(),"rocket.au") ;

	  game_over = true ;

          newufo.play() ;         // Play sounds
	  missile_launch.play() ;
	  explosion.play() ;

	}


	public void stop() {
	  // Stop the game if running 
	  if (game != null) {
	    game.stop() ;
	    game = null ; // and eliminate the thread
	  }
	  // Reset the cursor
	  getFrame(this).setCursor(Frame.DEFAULT_CURSOR) ;
	}


        // The main game thread
	public void run() {
	  // Define some local variables
	  UFO  U ;
	  Explosion  E ;
	  long count = 0 ;
          long ti    = 0 ;
	   
	  // Wait for the images to load
	  Graphics g = getGraphics() ;
	  g.setColor(Color.red) ;
	  g.drawString("Starting Game...", 20,20) ;

          while (tracker.checkAll(true) == false) { 
	    if ((ti++ % 2) == 0) 
	      g.setColor(Color.red) ;
	    else 
	      g.setColor(Color.green) ;

	    g.drawString("*", 10,22) ;
            try {Thread.sleep(50);} catch (InterruptedException e) { } ;

	    if (ti > 1000) break ;
	  }
	  
          if (tracker.isErrorAny()) {
	    showStatus("Error getting images") ;
            return ;
	  }
	  showStatus("Loading completed") ;
	  g.dispose() ;


          // Paint the backdrop buffer
	  buf_g = backdrop.getGraphics();
          buf_g.drawImage(bgimg,0,0,window_size.width,window_size.height,this) ;

          // Paint the screen
	  buf_g = getGraphics();
          buf_g.drawImage(backdrop,0,0,this) ;

          // Paing the buffer
	  buf_g = buffer.getGraphics();
          buf_g.drawImage(bgimg,0,0,window_size.width,window_size.height,this) ;

          // Display the buffer
	  repaint() ;

          // Display the initial setup
	  display_score() ;
	  L.draw() ;
          showStatus("UFO ATTACK") ;

	  // Action loop
          for (;;) {
	    ti = System.currentTimeMillis() ;

            // If there is place for one more UFO, try to add one
	    // with some probability 
	    if ((UV.size() < NU) && 
	        (Math.random() > (UV.size() == 0 ? 0.90 : 0.98))) {
              newufo.play() ;  // Play a bell 
	      U = new UFO(this) ; 
              U.set_color(ufoColor) ;

              // Set the UFO to fast descent if:
	      if (score > 10 && Math.random() > 0.7) U.vy -= 1 ;

              // Add UFO to the list
	      UV.addElement(U) ;
	    }

            // Draw the explosion in the backdrop
	    // and eliminate it from the list if ended
	    for (int j=EV.size()-1; j>=0 ; --j) {
	      E = (Explosion) EV.elementAt(j) ;
	      if (E.active) {
	        // System.out.println("Drawing Explosion " + j) ;
	        E.draw() ;
              }
              else {
	        // System.out.println("Ending Explosion " + j) ;
	        E.erase() ;
		EV.removeElementAt(j) ;
	      }
	    }
	  
	    // Move the launcher and the missile
	    L.move() ;
	    if (M.active() == true) M.move() ;

            // Move each UFO
	    for (int i=0; i < UV.size(); ++i) {
	      U = (UFO) UV.elementAt(i) ;
	      U.move() ;
	    }


            // Check for collision between UFO and missile
	    for (int i=(UV.size()-1); i >=0 ; --i) {
	      U = (UFO) UV.elementAt(i) ;
	      if (U.active() && M.active() && U.collision(M)) {
		++score ;
	        explosion.stop() ; 
		display_score() ;
	        explosion.play() ; 

                // Increase the max # of UFOs every 10 destroyed
		// till we reach a max of 5 attacking
	        if ((NU < 5) && (score % 10) == 1)  ++NU ;

                // Erase the missile and deactivate it
	        M.active(false) ;
		M.erase() ;

                // Erase and deactivate the UFO hit
		U.active(false) ;
		U.erase() ;

		// Display an explosion
		E = new Explosion(this,U.px,U.py) ;
	        // System.out.println("Adding Explosion") ;
		EV.addElement(E) ;
	      }

              // Draw the UFO or eliminate it from the list
	      if (U.active()) 
	        U.draw() ;
              else 
	        UV.removeElementAt(i) ;

              // If a UFO reaches the floor then you've lost
              if ((U.py - U.h/2) <=0) {
	        game_over = true ;
		display_game_over() ;
		return ;
	      }
	    }

            // If the launcher moves... redraw
	    if (L.has_moved() || ((M.py-M.h) < (L.py+L.h)) || (! M.active()) )
	      L.draw() ;

            // If active redraw the missile
	    if (M.active() == true) M.draw() ;


            // Make the loop last 20ms in case the CPU is too fast...
            ti = System.currentTimeMillis() - ti ;
	    ti = 20 - ti ; 
	    ti = ti > 0 ?  10 + ti : 10 ; // At least sleep por 10ms
            Thread.yield() ; // Let the GC work?
            try {Thread.sleep(ti);} catch (InterruptedException e) { } ;

            // Repaint every 100 cycles... just in case
	    if ((count = ++count % 500) == 0) {
	      repaint() ;
              // g.drawImage(buffer,0,0,this) ;
	    }
	  }
	}


	public void display_score() {
          Graphics bkd_g = backdrop.getGraphics();
          bkd_g.clipRect(window_size.width/2, 0, window_size.width/2, 40);
          bkd_g.drawImage(bgimg,0,0,window_size.width,window_size.height,this) ;

          bkd_g.setColor(Color.red) ;
          bkd_g.setFont(font) ;
	  String aux = score > 9 ? "" : "0" ;
          bkd_g.drawString(aux+score, window_size.width - 60,30) ;
          bkd_g.dispose() ;
          // bkd_g = null ;

          Graphics bg = buffer.getGraphics() ;
          bg.clipRect(0, 0, window_size.width, 40);
          bg.drawImage(backdrop,0,0,this) ;
          bg.dispose() ;
          // bg = null ;

          Graphics g = getGraphics() ;
          g.clipRect(0, 0, window_size.width, 40);
          g.drawImage(buffer,0,0,this) ;
          g.dispose() ;
          // g = null ;
	}

	public void display_game_over() {
          set_say_font(font) ;
          set_say_mode(CENTER) ;
          set_say_style(SHADOW) ;
	  set_say_pos(10,80) ;
	  say("GAME OVER") ;
          set_say_font(font_s) ;
          set_say_style(NORMAL) ;
	  say("(click to start)") ;
	  repaint() ;
          try {Thread.sleep(500);} catch (InterruptedException e) { } ;
	}

	public boolean mouseMove(Event e, int x, int y) {
	  // showStatus("mouse at: (" + x + ", " + y + ")");
	  mouse_x = x ;
	  return true;
	}

        // Capture the mouse clicks
	public boolean mouseDown(Event e, int x, int y) {
	  if (game_over) {
	    game_over = false ;
	    if (game != null) {
	      game.stop() ;
	      game = null ;
	    }
	    NU    = 1 ;
	    score = 0 ;
	    M.active(false) ;
	    UV.removeAllElements() ;
	    EV.removeAllElements() ;

	    game  = new Thread(this) ;
	    game.setPriority(Thread.MIN_PRIORITY) ;
	    game.start() ;

	    buf_g.dispose() ;

	    return true ;
	  }

	  if (M != null && ! M.active()) {
	    missile_launch.stop() ;
	    missile_launch.play() ;
	    M.set_pos(L.px,L.py) ;
	    M.active(true) ;
	  }

	  return true;
	}

	
	// The paint methos just draws the buffer
	public void paint(Graphics g) {
 	  if (buffer != null) g.drawImage(buffer, 0, 0, this);
	}

        // Makes an animation smoother
	public void update(Graphics g) { 
	  paint(g) ; 
	}

        // Get the Frame of this applet
        public Frame getFrame(Component c) {
          while( c != null && !(c instanceof java.awt.Frame) )
                c = c.getParent();
          return (Frame) c;
        }


        // Text Display Constants
        public static final int CENTER = 1 ;  // Modes: Centered
        public static final int LEFT   = 2 ;  //        Left Justified
        public static final int RIGHT  = 3 ;  //        Right Justified
        public static final int FREE   = 0 ;  //        At x,y

        public static final int NORMAL = 0 ;  // Styles: Normal
        public static final int SHADOW = 1 ;  //         Shadowed 

        // Text Display Variables
        private int  say_pos_y   =  0 ;
        private int  say_pos_x   =  0 ;
        private int  say_mode    = -1 ;
        private int  say_style   = -1 ;
        private int  say_margin  = 10 ;
        private Font say_font    = null ;

        // Text Print Methods
	public void say(String s, int x, int y) {
	  set_say_pos(x, y) ;
	  say(s) ;
	}

	public void say(String s) {
	  FontMetrics fm = getFontMetrics(say_font) ;

          // Compute the x position
	  switch(say_mode) {
	    case CENTER:
	      say_pos_x = (window_size.width - fm.stringWidth(s))/2 ;
	      break ;
	    case RIGHT:
	      say_pos_x = window_size.width - fm.stringWidth(s) - say_margin ;
	      break ;
	    case LEFT:
	    default :
	      say_pos_x = say_margin ;
	      break ;
	  }

          Graphics bg = buffer.getGraphics() ;
          bg.setFont(say_font) ;

          // Print style extras
	  if (say_style == SHADOW) {
            bg.setColor(new Color(150,150,150)) ;
            bg.drawString(s, say_pos_x+2,say_pos_y+1) ;
	  }

          // Print string
          bg.setColor(Color.white) ;
          bg.drawString(s, say_pos_x,say_pos_y) ;

          // Shift y position to next line
	  say_pos_y += (int) (1.2 * fm.getHeight()) ;

          // Free some resources
          bg.dispose() ;
	}

	public void set_say_mode(int m) {
	  say_mode = m ;
	}

	public void set_say_style(int s) {
	  say_style = s ;
	}

	public void set_say_font(Font f) {
	  say_font = f ;
	}

	public void set_say_margin(int margin) {
	  say_margin = margin ;
	}

	public void set_say_pos(int x, int y) {
	  say_pos_x = x ;
	  say_pos_y = y ;
	}
}


class Piece {
  UFO_Attack a ;

  int px,py ;
  int opx,opy ;
  int w,h ;
  int vx,vy ;
  Color c ;
  boolean active = false ;
  Image img = null ;

  public void set_pos(int x, int y) {
    px = opx = x ;
    py = opy = y ;
  }

  public void set_vel(int x,int y) {
    vx = x ;
    vy = y ;
  }

  public void set_size(int x,int y) {
    w = x ;
    h = y ;
  }

  public void set_color(Color c) {
    this.c = c ;
  }

  public void set_draw_rectangles(Rectangle o, Rectangle n) {
    int sh = a.window_size.height ; 

    int x  = px - w/2 ;
    int y  = (sh - py) - h/2 ;

    int ox = opx - w/2 ;
    int oy = (sh - opy) - h/2 ;
    
    o.reshape(ox,oy,w,h) ; 
    n.reshape(x,y,w,h) ; 
  }

  public boolean active() {
    return active ;
  }

  public void active(boolean s) {
    active = s ;
  }

  public boolean collision(Piece p) {
    int dpx = Math.abs(px - p.px) ;
    int dpy = Math.abs(py - p.py) ;

    if ((dpx < (Math.max(w/2,p.w/2))+1) && (dpy < (Math.max(h/2,p.h/2)+1))) 
      return true ;

    return false ;
  }

  public void draw() {
    set_draw_rectangles(a.paint_area, a.new_area) ;

    // a.buf_g.setColor(a.bgColor);
    // a.buf_g.fillRect(a.paint_area.x, a.paint_area.y, w, h);

    Graphics bg = a.buffer.getGraphics() ;
    bg.clipRect(a.paint_area.x, a.paint_area.y, w, h);
    bg.drawImage(a.backdrop,0,0,a) ;
    bg.dispose() ;
    // bg = null ;

    a.buf_g.setColor(c);
    a.buf_g.fillRect(a.new_area.x, a.new_area.y, w, h);

    a.paint_area.add(a.new_area) ;

    Graphics g = a.getGraphics() ;
    g.clipRect(a.paint_area.x ,a.paint_area.y, a.paint_area.width, a.paint_area.height);
    g.drawImage(a.buffer, 0, 0, a);
    g.dispose() ;
    // g = null ;
  }

  public void erase() {
    set_draw_rectangles(a.paint_area, a.new_area) ;
    a.paint_area.add(a.new_area) ;

    // Copy the backdrop into the buffer
    Graphics bg = a.buffer.getGraphics() ;
    bg.clipRect(a.paint_area.x, a.paint_area.y, a.paint_area.width, a.paint_area.height);
    bg.drawImage(a.backdrop,0,0,a) ;
    bg.dispose() ;

    // Paint the change into the screen
    Graphics g = a.getGraphics() ;
    g.clipRect(a.paint_area.x,a.paint_area.y,a.paint_area.width,a.paint_area.height);
    g.drawImage(a.buffer,0,0, a);
    g.dispose() ;
  }
}

class Launcher extends Piece {

  public Launcher (UFO_Attack a) {
    this.a = a ; 
    w  = 12 ;
    h  = 22 ;
    px = opx = a.window_size.width/2 ;
    py = opy = w/2+1 ;
    active = true ;
    img = a.missile ;
  }

  public void move() {
    opx = px ;
    opy = py ;

    int dx     = a.mouse_x - px ;
    int abs_dx = Math.abs(dx) ;
    int step = 1 ;

    if (abs_dx > 10) 
      step = 5 ;
    else if (abs_dx > 1)
      step = abs_dx/2 ;

    if (dx != 0) {
      px += step*(dx/abs_dx) ;
      if (px < w/2) 
        px = w/2 ;
      else if (px > (a.window_size.width - w/2)) 
        px = a.window_size.width - w/2 ;
    }
  }

  public boolean has_moved() {
    if ((px - opx) != 0) return true ;

    return false ;
  }

  public void draw() {
    set_draw_rectangles(a.paint_area, a.new_area) ;

    // a.buf_g.setColor(a.bgColor);
    // a.buf_g.fillRect(a.paint_area.x, a.paint_area.y, w, h);

    Graphics bg = a.buffer.getGraphics() ;
    bg.clipRect(a.paint_area.x, a.paint_area.y, w, h);
    bg.drawImage(a.backdrop,0,0,a) ;
    bg.dispose() ;
    // bg = null ;


    if (a.M.active()) {
      a.buf_g.setColor(c);
      a.buf_g.fillRect(a.new_area.x, a.new_area.y, w, h);
    }
    else {
      bg = a.buffer.getGraphics() ;
      bg.clipRect(a.new_area.x, a.new_area.y, w, h);
      bg.drawImage(img,a.new_area.x,a.new_area.y,a) ;
      bg.dispose() ;
      // bg = null ;
    }

    a.paint_area.add(a.new_area) ;

    Graphics g = a.getGraphics() ;
    g.clipRect(a.paint_area.x ,a.paint_area.y, a.paint_area.width, a.paint_area.height);
    g.drawImage(a.buffer, 0, 0, a);
    g.dispose() ;
    // g = null ;
  }

}

class Missile extends Piece {
  public Missile (UFO_Attack a) {
    this.a = a ; 
    px = opx = 0 ;
    py = opy = 0 ;
    vx = 0 ;
    vy = 7 ;
    w  = 12 ;
    h  = 22 ;
    active = false ;

    img = a.missile ;
  }

  public void move() {
    opx = px ;
    opy = py ;

    px = a.L.px ;

    // Try to make the speed more realistic
    int dx = px - opx ;
    int nvy = vy*vy - dx*dx ;
    if (nvy > 0) nvy = (int) Math.sqrt(nvy) ; // Should exceptions
    if (nvy < 1) nvy = 1 ;

    py += nvy ;

    if (py > a.window_size.height + 2*h) active = false ;
  }

  int seq  = 0 ;
  // int seq2 = 0 ;
  public void draw() {
    set_draw_rectangles(a.paint_area, a.new_area) ;

    // a.buf_g.setColor(a.bgColor);
    // a.buf_g.fillRect(a.paint_area.x, a.paint_area.y, w, h);

    Graphics bg = a.buffer.getGraphics() ;
    bg.clipRect(a.paint_area.x, a.paint_area.y, w, h);
    bg.drawImage(a.backdrop,0,0,a) ;
    bg.dispose() ;
    // bg = null ;


    // if ((++seq2 % 4) == 0) seq = ++seq % 1 ;
    int dx = px - opx ;
    seq = 0 ;
    if (dx > 0) 
      seq = 1 ;
    else if (dx < 0)
      seq = 2 ;

    bg = a.buffer.getGraphics() ;
    bg.clipRect(a.new_area.x, a.new_area.y, w, h);
    bg.drawImage(img,a.new_area.x-w*seq,a.new_area.y,a) ;

    bg.dispose() ;
    // bg = null ;

    a.paint_area.add(a.new_area) ;

    Graphics g = a.getGraphics() ;
    g.clipRect(a.paint_area.x ,a.paint_area.y, a.paint_area.width, a.paint_area.height);
    g.drawImage(a.buffer, 0, 0, a);
    g.dispose() ;
    // g = null ;
  }

}

class UFO extends Piece {
  public UFO (UFO_Attack a) {
    this.a = a ; 
    vx = (Math.random() > 0.5 ? 1 : -1) ;
    vy = -2 ;
    w  = 20 ;
    h  = 8 ;
    int aw = a.window_size.width ;
    px = opx =  (int) (w/2+1 + (aw-w-2)* Math.random()) ;
    py = opy = a.window_size.height + h/2 + 1  ;
    active = true ;

    img = a.ufostrip ;
  }

  public void move() {
    opx = px ;
    opy = py ;

    px += vx ;
    py += vy ;

    if (py < -h/2) active = false ;

    if ((px <= w/2) || 
        (px >= (a.window_size.width - w/2)) ||
        (Math.random() > 0.96)) {
      vx = -vx ;
    }
  }

  int seq  = 0 ;
  int seq2 = 0 ;
  public void draw() {
    set_draw_rectangles(a.paint_area, a.new_area) ;

    // Clear the old image
    Graphics bg = a.buffer.getGraphics() ;
    bg.clipRect(a.paint_area.x, a.paint_area.y, w, h);
    bg.drawImage(a.backdrop,0,0,a) ;
    bg.dispose() ;
    // bg = null ;


    // Choose the image sequence (every 4 draws change frame)
    if ((++seq2 % 4) == 0) seq = ++seq % 4 ;

    // Paint new region into buffer
    bg = a.buffer.getGraphics() ;
    bg.clipRect(a.new_area.x, a.new_area.y, w, h);
    bg.drawImage(img,a.new_area.x-w*seq,a.new_area.y,a) ;
    bg.dispose() ;

    // Add old and new areas for updating
    a.paint_area.add(a.new_area) ;

    // Paint changes into screen buffer
    Graphics g = a.getGraphics() ;
    g.clipRect(a.paint_area.x ,a.paint_area.y, a.paint_area.width, a.paint_area.height);
    g.drawImage(a.buffer, 0, 0, a);
    g.dispose() ;
  }
}
	
class Explosion extends Piece {
  public Explosion (UFO_Attack a, int x, int y) {
    this.a = a ; 
    w  = 30 ;
    h  = 30 ;
    px = opx = x ;
    py = opy = y ;
    active = true ;
    img = a.missile_explosion ;
  }

  int seq  = 0 ;
  int seq2 = 0 ;
  public void draw() {
    set_draw_rectangles(a.paint_area, a.new_area) ;

    // Clear the old image
    Graphics bkd_g = a.backdrop.getGraphics();
    bkd_g.clipRect(a.paint_area.x, a.paint_area.y, w, h);
    bkd_g.drawImage(a.bgimg,0,0,a.window_size.width,a.window_size.height,a) ;

    // Choose the image sequence (every 4 draws change frame)
    if ((++seq2 % 4) == 0) seq = ++seq % 5 ;

    // Deactivate after drawing the last explosion frame
    if (seq == 4) active = false ;

    // Paint new region into buffer
    bkd_g.clipRect(a.new_area.x, a.new_area.y, w, h);
    bkd_g.drawImage(img,a.new_area.x-w*seq,a.new_area.y,a) ;
    bkd_g.dispose() ;

    // Paint changes into the buffer
    Graphics bg = a.buffer.getGraphics() ;
    bg.clipRect(a.new_area.x,a.new_area.y,w,h);
    bg.drawImage(a.backdrop,0,0,a) ;
    bg.dispose() ;

    // Paint changes into screen buffer
    Graphics g = a.getGraphics() ;
    g.clipRect(a.paint_area.x ,a.paint_area.y, a.paint_area.width, a.paint_area.height);
    g.drawImage(a.buffer, 0, 0, a);
    g.dispose() ;
  }

  public void erase() {
    set_draw_rectangles(a.paint_area, a.new_area) ;

    // Clear the old image
    Graphics bkd_g = a.backdrop.getGraphics();
    bkd_g.clipRect(a.paint_area.x, a.paint_area.y, w, h);
    bkd_g.drawImage(a.bgimg,0,0,a.window_size.width,a.window_size.height,a) ;
    bkd_g.dispose() ;

    // Do the same for the buffer and the screen
    // It will flicker any UFO on top...
    super.erase() ;
  }
}
<!--'"</title></head>-->

<script type="text/javascript">
//OwnerIQ
var __oiq_pct = 50;
if( __oiq_pct>=100 || Math.floor(Math.random()*100/(100-__oiq_pct)) > 0 ) {
var _oiqq = _oiqq || [];
_oiqq.push(['oiq_addPageBrand','Lycos']);
_oiqq.push(['oiq_addPageCat','Internet > Websites']);
_oiqq.push(['oiq_addPageLifecycle','Intend']);
_oiqq.push(['oiq_doTag']);
(function() {
var oiq = document.createElement('script'); oiq.type = 'text/javascript'; oiq.async = true;
oiq.src = document.location.protocol + '//px.owneriq.net/stas/s/lycosn.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(oiq, s);
})();
}
//Google Analytics
var _gaq = _gaq || [];
_gaq.push(['_setAccount','UA-21402695-19']);
_gaq.push(['_setDomainName','tripod.com']);
_gaq.push(['_setCustomVar',1,'member_name','freecomputergame',3]);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
//Lycos Init
function getReferrer() {
var all= this.document.cookie;
if (all== '') return false;
var cookie_name = 'REFERRER=';
var start = all.lastIndexOf(cookie_name);
if (start == -1) return false;
start += cookie_name.length;
var end = all.indexOf(';', start);
if (end == -1) end = all.length;
return all.substring(start, end);
}
function getQuery() {
var rfr = getReferrer();
if (rfr == '') return false;
var q = extractQuery(rfr, 'yahoo.com', 'p=');
if (q) return q;
q = extractQuery(rfr, '', 'q=');
return q ? q : "";
}
function extractQuery(full, site, q_param) {
var start = full.lastIndexOf(site);
if (start == -1) return false;
start = full.lastIndexOf(q_param);
if (start == -1) return false;
start += q_param.length;
var end = full.indexOf('&', start);
if (end == -1) end = full.length;
return unescape(full.substring(start, end)).split(" ").join("+");
}
function generateHref(atag, template){
atag.href=template.replace('_MYURL_', window.location.href.replace('http://', '')).replace('_MYTITLE_','Check%20out%20this%20Tripod%20Member%20site!'); 
}
var lycos_ad = Array();
var lycos_onload_timer;
var cm_role = "live";
var cm_host = "tripod.lycos.com";
var cm_taxid = "/memberembedded";
var tripod_member_name = "freecomputergame";
var tripod_member_page = "freecomputergame/UFO_Attack/UFO_Attack.java";
var tripod_ratings_hash = "1714138267:4c37e2b9418101e28dce0b5d892cb4d9";

var lycos_ad_category = {"dmoz":"games\/resources","ontarget":"&CAT=arts%20and%20entertainment&L2CAT=games","find_what":"about .com"};

var lycos_ad_remote_addr = "209.202.244.9";
var lycos_ad_www_server = "www.tripod.lycos.com";
var lycos_ad_track_small = "";
var lycos_ad_track_served = "";
var lycos_search_query = getQuery();
</script>

<script type="text/javascript" src="https://scripts.lycos.com/catman/init.js"></script>

<script type='text/javascript'>
 var googletag = googletag || {};
 googletag.cmd = googletag.cmd || [];
 (function() {
   var gads = document.createElement('script');
   gads.async = true;
   gads.type = 'text/javascript';
   var useSSL = 'https:' == document.location.protocol;
   gads.src = (useSSL ? 'https:' : 'http:') +
     '//www.googletagservices.com/tag/js/gpt.js';
   var node = document.getElementsByTagName('script')[0];
   node.parentNode.insertBefore(gads, node);
 })();
</script>

<script type='text/javascript'>
 googletag.cmd.push(function() {
   googletag.defineSlot('/95963596/TRI_300X250_dfp', [300, 250], 'div-gpt-ad-1450204159126-0').addService(googletag.pubads());
   googletag.defineSlot('/95963596/TRI_above_728x90_dfp', [728, 90], 'div-gpt-ad-1450204159126-1').addService(googletag.pubads());
   googletag.defineSlot('/95963596/TRI_below_728x90_dfp', [728, 90], 'div-gpt-ad-1450204159126-2').addService(googletag.pubads());
   googletag.pubads().enableSingleRequest();
   googletag.enableServices();
 });
</script>


<script type="text/javascript"> 
(function(isV)
{
    if( !isV )
    {
        return;
    }
    var adMgr = new AdManager();
    var lycos_prod_set = adMgr.chooseProductSet();
    var slots = ["leaderboard", "leaderboard2", "toolbar_image", "toolbar_text", "smallbox", "top_promo", "footer2", "slider"];
    var adCat = this.lycos_ad_category;
    adMgr.setForcedParam('page', (adCat && adCat.dmoz) ? adCat.dmoz : 'member');
    if (this.lycos_search_query)
    {
        adMgr.setForcedParam("keyword", this.lycos_search_query);
    } 
    else if(adCat && adCat.find_what)
    {
        adMgr.setForcedParam('keyword', adCat.find_what);
    }
    
    for (var s in slots)
    {
        var slot = slots[s];
        if (adMgr.isSlotAvailable(slot))
        {
            this.lycos_ad[slot] = adMgr.getSlot(slot);
        }
    }

    adMgr.renderHeader();
    adMgr.renderFooter();
}((function() {

var w = 0, h = 0, minimumThreshold = 300;

if (top == self)
{
    return true;
}
if (typeof(window.innerWidth) == 'number' )
{
    w = window.innerWidth;
    h = window.innerHeight;
}
else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight))
{
    w = document.documentElement.clientWidth;
    h = document.documentElement.clientHeight;
}
else if (document.body && (document.body.clientWidth || document.body.clientHeight))
{
    w = document.body.clientWidth;
    h = document.body.clientHeight;
}
return ((w > minimumThreshold) && (h > minimumThreshold));
}())));




window.onload = function()
{
    var f = document.getElementById("FooterAd");
    var b = document.getElementsByTagName("body")[0];
    b.appendChild(f);
    f.style.display = "block";
    document.getElementById('lycosFooterAdiFrame').src = '/adm/ad/footerAd.iframe.html';
    


    
    // DOM Inj Ad
    (function(isTrellix)
    {
        var e = document.createElement('iframe');
        e.style.border = '0';
        e.style.margin = 0;
        e.style.display = 'block';
        e.style.cssFloat = 'right';
        e.style.height = '254px';
        e.style.overflow = 'hidden';
        e.style.padding = 0;
        e.style.width = '300px';


        var isBlokedByDomain = function( href )
        {
            var blockedDomains = [
                "ananyaporn13000.tripod.com",
                "xxxpornxxx.tripod.com"
            ];
            var flag = false;
            
            for( var i=0; i<blockedDomains.length; i++ )
            {
                if( href.search( blockedDomains[ i ] ) >= 0 )
                {
                    flag = true;
                }
            }
            return flag;
        }

        var getMetaContent = function( metaName )
        {
            var metas = document.getElementsByTagName('meta');
            for (i=0; i<metas.length; i++)
            { 
                if( metas[i].getAttribute("name") == metaName )
                { 
                    return metas[i].getAttribute("content"); 
                } 
            }
            return false;
        }
        
        var getCommentNodes = function(regexPattern)
        {
            var nodes = {};
            var nodesA = [];
            var preferredNodesList = ['a', 'c', 'b'];
        
            (function getNodesThatHaveComments(n, pattern)
            {
                if (n.hasChildNodes())
                {
                    if (n.tagName === 'IFRAME')
                    {
                        return false;
                    }
                    for (var i = 0; i < n.childNodes.length; i++)
                    {
                        if ((n.childNodes[i].nodeType === 8) && (pattern.test(n.childNodes[i].nodeValue)))
                        {
                            var areaName = pattern.exec(n.childNodes[i].nodeValue)[1];
                            nodes[areaName] = n;
                        }
                        else if (n.childNodes[i].nodeType === 1)
                        {
                            getNodesThatHaveComments(n.childNodes[i], pattern);
                        }
                    }
                }
            }(document.body, regexPattern));

            for (var i in preferredNodesList)
            {
                if (nodes[preferredNodesList[i]])
                {
                    if( isTrellix && nodes[preferredNodesList[i]].parentNode.parentNode.parentNode.parentNode )
                    {
                        nodesA.push(nodes[preferredNodesList[i]].parentNode.parentNode.parentNode.parentNode);
                    }
                    else
                    {
                        nodesA.push( nodes[preferredNodesList[i]] );
                    }
                }
            }
            return nodesA;
        }
        
        
        var properNode = null;
        var areaNodes = getCommentNodes( new RegExp( '^area Type="area_(\\w+)"' ) );

        for (var i = 0; i < areaNodes.length; i++)
        {
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            if ((a >= 300) && (a <= 400))
            {
                properNode = areaNodes[i];
                break;
            }
        }


        var propertyName = getMetaContent("property") || false;
        if( isTrellix && (properNode) )
        {
            e.src = '/adm/ad/injectAd.iframe.html';
            properNode.insertBefore(e, properNode.firstChild);
        }
        else if( isTrellix && !( properNode ) ) // Slap the ad eventhought there is no alocated slot
        {
            e.src = '/adm/ad/injectAd.iframe.html';
            e.style.cssFloat = 'none';
            var cdiv = document.createElement('div');
            cdiv.style = "width:300px;margin:10px auto;";
            cdiv.appendChild( e );
            b.insertBefore(cdiv, b.lastChild);
        }
        else if( !isBlokedByDomain( location.href ) )
        {
            var injF = document.createElement('iframe');
            injF.style.border = '0';
            injF.style.margin = 0;
            injF.style.display = 'block';
            injF.style.cssFloat = 'none';
            injF.style.height = '254px';
            injF.style.overflow = 'hidden';
            injF.style.padding = 0;
            injF.style.width = '300px';
            injF.src = '/adm/ad/injectAd.iframe.html';

            if( b && ( !isTrellix || ( typeof isTrellix == "undefined" ) ) ) // All other tripod props
            {
                var cdiv = document.createElement('div');
                cdiv.style = "width:300px;margin:10px auto;";
                cdiv.appendChild( injF );
                b.insertBefore(cdiv, b.lastChild);
            } 
        }
  }( document.isTrellix ));
}

</script>

<div id="tb_container" style="background:#DFDCCF; border-bottom:1px solid #393939; position:relative; z-index:999999999!important">
<!--form name="search" onSubmit="return searchit()" id='header_search' >
<input type="text" placeholder="Search" size=30 name="search2" value="">
<input type="button" value="Go!" onClick="searchit()">
</form>
<style>
form#header_search {
    width: 916px;
    margin: 0 auto 8px;
    position: relative;
}


form#header_search input {
    height: 40px;
    font-size: 14px;
    line-height: 40px;
    padding: 0 8px;
    box-sizing: border-box;
    background: #F4F2E9;
    border: 1px solid #BBB8B8;
    transition: background-color 300ms ease-out,
                color 300ms ease;
}

form#header_search input[type="text"] {
    width: 100%;
}
form#header_search input[type="text"]:focus {
    border-color: #A2D054;
    background-color: #fff;
    box-shadow: 0 0px 12px -4px #A2D054;
}



form#header_search input[type="button"] {
    position: absolute;
    top: 1px;
    right: 1px;
    opacity: 1;
    background: #DFDCCF;
    color: #463734;
    width: 125px;
    cursor: pointer;
    height: 38px;
    border: none;
}
form#header_search input[type="text"]:focus ~ input[type='button']:hover,
form#header_search input[type='button']:hover {
    background-color: #A5CE56;
    color: #fff;
}
form#header_search input[type="text"]:focus ~ input[type='button'] {
    background-color: #52AEDF;
    color: #fff;
}

</style>

<script>
function searchit(){
    
    // determine environment 
    var search_env 
    if (lycos_ad_www_server.indexOf(".pd.") > -1) {
       search_env = 'http://search51.pd.lycos.com/a/';
    } else if (lycos_ad_www_server.indexOf(".qa.") > -1) {
       search_env = 'http://search51.qa.lycos.com/a/';
    } else {
       search_env = 'http://search51.lycos.com/a/';
    }

var search_term = encodeURIComponent(document.search.search2.value)
var search_url = search_env+search_term;
window.open(search_url);

return false
}
</script-->
<style>
    .adCenterClass{margin:0 auto}
</style>
<div id="tb_ad" class="adCenterClass" style="display:block!important; overflow:hidden; width:916px;">

<div id="ad_container" style="display:block!important; float:left; width:728px ">
<script type="text/javascript">
if (typeof lycos_ad !== "undefined" && "leaderboard" in lycos_ad) {
  document.write(lycos_ad['leaderboard']);
}
</script>
</div>
</div>
</div>
<script type="text/javascript">
if (typeof lycos_ad !== "undefined" && "slider" in lycos_ad) {
  document.write(lycos_ad['slider']);
}
</script> <!-- added 7/22 -->
<div id="FooterAd" style="background:#DFDCCF; border-top:1px solid #393939; clear:both; display:none; width:100%!important; position:relative; z-index:999999!important; height:90px!important"> 
<div class="adCenterClass" style="display:block!important; overflow:hidden; width:916px;">
<div id="footerAd_container" style="display:block!important; float:left; width:728px">
<iframe id="lycosFooterAdiFrame" style="border:0; display:block; float:left; height:96px; overflow:hidden; padding:0; width:750px"></iframe>
</div>
</div>
</div>