Question

So, I have this Player.as class file with the following code:

private function PressAKey(event:KeyboardEvent):void
 {
   getDistance();
   if(event.keyCode == 32 && placedBomb == false && bombNumber == 0)//space
 {
   xKey = true;
   placeBomb();
   placedBomb = true;
}
}

Using this in conjunction with the following placeBomb() function:

private function placeBomb():void{

 MainClass.container.addChildAt(bomb,0);
 bomb.x = this.x;
 bomb.y = this.y+20;
 bombNumber ++;
}

The problem comes from this function which is trying to calculate the distance between the player and the bomb so that I can start building interactions:

private function getDistance():void{
 distance = Math.sqrt( ( this.x - MainClass.container.bomb.x ) * ( this.x - MainClass.container.bomb.x ) + ( this.y - MainClass.container.bomb.y ) * ( this.y - MainClass.container.bomb.y ) );
 trace(distance);
}

I get this error when I try this:

TypeError: Error #1010: A term is undefined and has no properties.
at Player/getDistance()
at Player/PressAKey()

Do you have any idea what I’m missing? It’s definitely a scoping issue, so what would I need to include in order for the entire class to recognize the bomb?

Answer 1

bomb is no property of MainClass.container. bomb is a only child.

refer a following code.

private function getDistance():void
{
   var bomb:DisplayObject = MainClass.container.getChildAt(0);

   distance = Math.sqrt( ( this.x - bomb.x ) * ( this.x - bomb.x ) + ( this.y - bomb.y ) * ( this.y - bomb.y ) );
   trace(distance);
}

How to reference all the children.

for(var i:int = 0; i<parentObject.numChildren; i++)
{ 
   var object:DisplayObject = parentObject.getChildAt(i);
   /*
   p.s: if a child object type is MovieClip. must be typecasting.
   var object:MovieClip = parentObject.getChildAt(i) as MovieClip;
   */
}