Question

I’m studying to be a Game Designer, and right now I’m having some issues with my flash game.

the game has a Counter Class, with a Score Class that extends Counter. and it is added to the stage in my PlayScreenA Class.

The Timer starts with a number and decreases every 24frames. but in my Hero Class I can pick up some coins and that coins are going to increase the Time on my Score.

The question is: How I can say in my Hero Class to execute the addToValue function inside the Counter Class?

Pieces of Code:
Creating my score in the PlayScreenA Class:

    private var myTime:Score = new Score();
    private function create_time (){

        myTime.x = 800;
        myTime.y = 50;          
        addChild(myTime);
    }

Counter Class:

package 
{
import flash.display.MovieClip;
public class Counter extends MovieClip
{
    public var currentValue:Number;

    public function Counter()
    {
        reset();
    }

    public function addToValue( amountToAdd:Number ):void
    {
        currentValue = currentValue + amountToAdd;
        updateDisplay();
    }

    public function subToValue( amountToSub:Number ):void
    {
        currentValue = currentValue - amountToSub;
        updateDisplay();
    }

    public function reset():void
    {
        currentValue = 20;
        updateDisplay();
    }

    public function updateDisplay():void
    {

    }
}
}

Score Class:

package 
{
import flash.text.TextField;
import flash.events.Event;
public class Score extends Counter
{
    protected var _timeCounter:int;     

    public function Score()
    {
        super();
        addEventListener(Event.ENTER_FRAME, onUpdate);
    }
    override public function updateDisplay():void
    {
        super.updateDisplay();
        scoreDisplay.text = currentValue.toString();
    }
    protected function onUpdate(e:Event):void
    {
        _timeCounter++;
        trace(currentValue);

        if (_timeCounter == 24)
        {
            this.subToValue( 1 );
            _timeCounter = 0;
        }           
    }
}
}

Piece of my Hero Class where I need to Call the function:

for(var i:int; i<collisionList.length;i++)
        {
            var $collision:platform_tile = collisionList[i];

            if($hasCollided = hitbox.hitTestObject($collision.hitBox) && $collision.alpha<0.8 && $collision.alpha>0.6)
            {
                $collision.alpha=0;
                $collision.visible = false;
                //Here is where I want to call my subToValue                                        function!
                break;
            }

Answer 1

I assume you are trying to access the object of Score class created initially in the PlayerScreenA class…

If that is the case then you either derive a relationship between the two classes to pass this object or you could keep a static class keeping track of the function at a global level…

public class AppRefrences
{
    public static var addToValueFunc:Function;    
}

In Player A Class,

    private var myTime:Score = new Score();
    private function create_time (){

        myTime.x = 800;
        myTime.y = 50;          
        addChild(myTime);

        // This is where you set the function
        Apprefrences.addToValueFunc = myTime.addToValue;
    }

In Hero Class,

for(var i:int; i<collisionList.length;i++)
        {
            var $collision:platform_tile = collisionList[i];

            if($hasCollided = hitbox.hitTestObject($collision.hitBox) && $collision.alpha<0.8 && $collision.alpha>0.6)
            {
                $collision.alpha=0;
                $collision.visible = false;

                // This is where you call the function
                if(AppRefrences.addToValueFunc != null) 
                AppRefrences.addToValueFunc(0); 

                break;
            }

Try using getter & setters to control the update of the static variable. I didn’t include it for the sake of clarity.