Greenfoot

freddekl

2012/3/19

#

So I am new to Greenfoot and I am making a maze that goes through 7 Levels, I have created a times as a subclass of actor, but it only times for one world, then resets in the next one. How do I create a timer that continues to time through all the levels? Thanks

davmac

2012/3/20

#

Just move the existing timer into the new world, when you create the new world.

freddekl

2012/3/20

#

I don't think you understand, when I go to the next world, the timer resets, how do I make it so it doesnt reset and counts through all the levels

davmac

2012/3/20

#

Well, I guess I don't understand, because if you use the same timer it wouldn't reset unless you tell it to. It sounds to me like your new world is making a new timer, rather than using the timer from the other world. If you posted your code it would help!

freddekl

2012/3/20

#

So i made the timer a subclass of actor. Here is the code:

public class timer  extends Actor 
{ 
    long start_time, time; 
    boolean has_stored = false; 
    public void act() 
    { 
        /** 
         * Get the start time and store it when boolean has_stored is false. 
         */ 
        if(has_stored == false) 
        { 
            start_time = System.currentTimeMillis(); 
            has_stored = true; 
            System.out.println("0" + start_time); 
        } 
        /** 
         * long time is equal to start_time less current time (Milliseconds) divided by 1000. 
         */ 
        time = (System.currentTimeMillis() - start_time) / 1000; 
        /** 
         * Output the time since first executed. 
         */ 
        System.out.println("1" + time + " seconds"); //Enable to output 
        /** 
         * Update the image of this timer. Enable to use image. 
         */ 
        GreenfootImage timer_image = new GreenfootImage(135, 20); 
          setImage(timer_image); 
          timer_image.clear(); 
           timer_image.drawString("0" + time, 0, 10); 
          
    } 
}

davmac

2012/3/20

#

Ok, how about the code that sets the new world, and that transfers the timer to the new world?

freddekl

2012/3/21

#

Here is the code for going to the next level I'm using the Cansee method from one of the instruction levels I don't understand how to transfer the timer to the new world

public void nextLevel()
    {
        if (canSee(Food3.class))
        {
          Greenfoot.setWorld(new Level4());
          Greenfoot.playSound("nextLevel.mp3");
        }
        if (canSee(FoodIntro.class))
        {
          Greenfoot.playSound("Tetris.mp3");
          Greenfoot.setWorld(new Level1());
        }
        if (canSee(Food1.class))
        {
          Greenfoot.setWorld(new Levelinbetween());
          Greenfoot.playSound("nextLevel.mp3");
        }

davmac

2012/3/21

#

Ok - I see you are creating a new world, but you are not removing the timer from the current world and adding it to the new world. Probably, you are creating a new timer in the constructor of each of the world classes - you shouldn't do that. After making that change, the above code can be modified to something like:

    if (canSee(Food3.class))
    {
          // First pull the timer from the current world:
          Timer timer = (Timer) getWorld().getObjects(Timer.class).get(0); 
          int tx = timer.getX();
          int ty = timer.getY();
          getWorld().removeObject(timer);

          // Now create the new world, and add the timer into it:
          World newLevel = new Level4();
          Greenfoot.setWorld(newLevel);  
          newLevel.addObject(timer, tx, ty);

          Greenfoot.playSound("nextLevel.mp3");  
     }

etc.

freddekl

2012/3/27

#

Hey again, must say thanks for your help, but I have one final question. On the final level, I want the timer to stop and display the time as soon as the Actor reaches the world so I would have text in the background that says -------- Your Time: # (the # being the final time) How do i display a stopped final time as soon as it reaches the level?

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Timer that continues through different worlds