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Question by flberger · May 17, 2013 at 02:24 PM · camerabooinitialisation

Setting a class-wide attribute at startup in Boo

In my main Unity script I access other game objects frequenty, e.g. the camera. Since I do not want to call GameObject.Find("Main Camera") in every Update(), I want to keep a reference to the instance as a class-local variable.

However when I try

 import UnityEngine
 class PlayerBehaviour (MonoBehaviour): 
     main_camera as GameObject = GameObject.Find("Main Camera")

I get "UnityException: You are not allowed to call this function when declaring a variable. Move it to the line after without a variable declaration."

When I move this to Start()

 import UnityEngine

 class PlayerBehaviour (MonoBehaviour): 

     def Start ():
         main_camera = GameObject.Find("Main Camera")
         return

I get "Assets/PlayerBehaviour.boo(25,9): BCE0005: Unknown identifier: 'main_camera'."

How can I assign a local variable to the instance of another GameObject at initalisation, using Boo?

EDIT: The camera is just an example. I am looking for a Boo technique to cache a reference to any GameObject.

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Answer by DannyB · May 17, 2013 at 03:31 PM

I am writing in C#, not Boo, but my guess is that the solution would be the same.

Try separating the variable declaration and assignment.

Instead of

 main_camera as GameObject = GameObject.Find("Main Camera")

Try

 main_camera as GameObject
 
 def Start ():
     // This line should go in Awake() or later
     main_camera = GameObject.Find("Main Camera")
     return


This line should also work, if it is in Awake() or later, but then your variable is local to Awake()/Start() and not global, but you can test with this, just to see if its working.

 main_camera as GameObject = GameObject.Find("Main Camera")

(I am assuming varname as type is how you declare variables in Boo)

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avatar image flberger · May 21, 2013 at 08:39 AM 0
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Separating declaration and binding does the trick. That is a bit counterintuitive in Boo. It also works in Start(). Thanks. If you like, you can upvote the question.

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