[casual_games] Game Development in AS3

[dayvid jones]

In AS3 how does a movie clip reference or find another movieclip?  
Example, let's say I have a game that has enemy airplanes and the  
play uses a gun to shoot them down, the airplanes are randomly  
selected and addchild is used to place them in the DisplayObject on  
the stage by the document class. Now lets say that the airplanes drop  
bombs, so the airplanes have their own class linked to the airplane  
movie clips in the library, this class uses a timer to drop bombs by  
using addchild and moves the plane. The bombs have their own class  
that move them down the screen and do a hittest looking for the  
players gun. How do you do this in AS3? In AS2 I would use a _root to  
allow the Bomb class to find the Gun MC. So in AS3 how do classes  
find MCs on the stage?

Is my approach totally off for AS3? I'm trying to migrate from AS2  
game development to AS3, and my biggest problems is the DiplayObject ; (

Does anyone know of a book or website that gives instruction or  
examples for a game with enemies that shoot back? Or can anyone  
answer my question?

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