Informatik 10

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====== Hunter Game ======
<HTML>

<div class="java-online" style="height: 400px; width: 100%" data-java-online="{'withBottomPanel': true, 'id': 'hunter'}">

<script type="text/plain" title="Main.java">
// Main Program:
SystemTools.setSpeed(-1);  // maximum execution speed
new HunterGame();

/**
 * Class Main manages huter, target and enemies
 * and maintains program state.
 * States: "startscreen", "game running", "game over"
 */
class HunterGame extends Actor {
   
   Hunter hunter;
   Target target;
   Group boulders;

   String state;     // allowed values: "startscreen", "game running", "game over"

   Text scoreText;   // displays score
   int score = 0;

   Text caption;     // displays big caption: "Hunter Game" or "Game Over"
   
   int timeSpacePressed = 0;  // time since space key has been pressed in milliseconds

   HunterGame() {
      hunter = new Hunter(this);
      
      boulders = new Group();     // holds all enemies

      scoreText = new Text(40, 40, 70, "0");
      scoreText.setFillColor(Color.bisque);
      scoreText.setBorderColor(Color.cadetblue);

      caption = new Text(400, 200, 80, "Hunter Game");
      caption.setFillColor(Color.bisque);
      caption.setBorderColor(Color.darkcyan);

      caption.setAlignment(Alignment.center);

      setState("startscreen");   // start game

   }

   void makeNewTarget() {
      target = new Target(this);
   }

   /**
    * this method is called 30 times per second 
    */
   public void act() {

      if(state == "game running") { 
         // did hunter catch target?
         if(hunter.collidesWith(target)) {
            target.destroy();
            makeNewTarget();
            score++;
            scoreText.setText(score);
         }

         // add boulder with probability of 1/100
         if(Math.random() < 0.01) { 
            addBoulder();
         } 

         if(hunter.isOutsideView() || hunter.collidesWith(boulders)) {
            setState("game over");
         }

      } 

      // if space key is pressed consider changing state...
      if(isKeyDown(" ") && System.currentTimeMillis() - timeSpacePressed > 300) {
         timeSpacePressed = System.currentTimeMillis();

         switch(state) {
            case "startscreen" : 
               setState("game running");
               break;
            case "game over" : 
               setState("startscreen");
               break;
            default : 
                
         }
      }

   }

   void addBoulder() {
      boulders.add(new Boulder(this));
   }

   void setState(String newState) {
      switch(newState) {
         case "startscreen" : 
            caption.setVisible(true);
            scoreText.setVisible(false);
            caption.setText("Hunter Game");
            hunter.setVisible(false);
            hunter.moveTo(400, 300);
            break;
         case "game running" : 
            caption.setVisible(false);
            hunter.setVisible(true);
            scoreText.setVisible(true);
            score = 0;
            scoreText.setText(0);
            makeNewTarget();
            break;
         case "game over" : 
            caption.setVisible(true);
            caption.setText("Game Over");
            boulders.destroyAllChildren();
            hunter.setVisible(false);
            target.destroy();
            break;
         default : 
             
      }


      state = newState;
   }




}
</script>

<script type="text/plain" title="Hunter.java">
class Hunter extends Circle {
   double vx = 5;
   double vy = 0;

   double v = 5;

   HunterGame main;

   Hunter(HunterGame main) {
      super(400, 300, 10);
      this.main = main;
      setFillColor(Color.red);
   }

   public void act() {
      if(main.state != "game running") {
         return;
      }

      move(vx, vy);

      if(isKeyDown(Key.ArrowUp)) {
         vx = 0;
         vy = -v;
      }
      if(isKeyDown(Key.ArrowDown)) {
         vx = 0;
         vy = v;
      }
      if(isKeyDown(Key.ArrowRight)) {
         vx = v;
         vy = 0;
      }
      if(isKeyDown(Key.ArrowLeft)) {
         vx = -v;
         vy = 0;
      }

   }
}
</script>

<script type="text/plain" title="Target.java">
class Target extends Circle {
   
   Target(HunterGame main) {
      super(-100, -100, 8);
      setFillColor(Color.lightgreen);

      // dont create target overlapping with hunter
      do {
         
         moveTo(Random.randdouble(20, 780), Random.randdouble(20, 580));

      } while (collidesWith(main.hunter))
   }

}
</script>

<script type="text/plain" title="Boulder.java">
class Boulder extends Sprite {

   double v = Random.randdouble(-3, -1);  // speed in pixel per 1/30 s
   double w = Random.randdouble(-5, 5);   // angular speed in degrees per 1/30 s

   Boulder(HunterGame main) {
      // create boulder righthand outside view
      super(900, Random.randdouble(0, 600), SpriteLibrary.TowerDefense, 108);

      setImageIndex(Random.randint(108, 110));
      scale(Random.randdouble(0.5, 2.0));

   }

   public void act() {
      move(v, 0);
      rotate(w);
      
      // if boulder leaves view to the left then swap it to 
      if(getCenterX() < -50) {
         moveTo(900, getCenterY());
      }
   }
}
</script>

</div>

</HTML>
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