1     /**
2      * Curso B?sico de desarrollo de Juegos en Java - Invaders
3      * 
4      * (c) 2004 Planetalia S.L. - Todos los derechos reservados. Prohibida su reproducci?n
5      * 
6      * http://www.planetalia.com
7      * 
8      */
9     package version22;
10    
11    import java.awt.image.ImageObserver;
12    
13    public interface Stage extends ImageObserver {
14      public static final int WIDTH=640;
15      public static final int HEIGHT=480;
16      public static final int PLAY_HEIGHT = 400; 
17      public static final int SPEED=10;
18      public SpriteCache getSpriteCache();
19      public void addActor(Actor a);

20      public Player getPlayer();

21    }
22    

           . . .  
81      
82      public Player getPlayer() {
83        return player;
84      }
85      
           . . .  

1     /**
2      * Curso B?sico de desarrollo de Juegos en Java - Invaders
3      * 
4      * (c) 2004 Planetalia S.L. - Todos los derechos reservados. Prohibida su reproducci?n
5      * 
6      * http://www.planetalia.com
7      * 
8      */
9     package version22;
10    
11    public class Monster extends Actor {
12      protected int vx;
13      
14      public Monster(Stage stage) {
15        super(stage);
16        setSpriteNames( new String[] {"bicho0.gif","bicho1.gif"});
17        setFrameSpeed(35);
18      }
19      
20      public void act() {
21        super.act();
22        x+=vx;
23        if (x < 0 || x > Stage.WIDTH)
24          vx = -vx;
25      }
26    
27      public int getVx() { return vx; }
28      public void setVx(int i) {vx = i; }
29      
30      public void collision(Actor a) {
31        if (a instanceof Bullet || a instanceof Bomb) {
32          remove();

33          stage.getPlayer().addScore(20);

34        }
35      }
36    }
37