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Question by Crystalline · Nov 18, 2013 at 03:13 PM · variablecasting

Casting Variables

Hi

How would I go about casting some variables so they would be accessible to other scripts without having to define them once again.

Ex: var key1 = Input.GetKeyDown(KeyCode.Alpha1);

I want key1 to be known on all the scripts that use its name, is it even possible?

Thanks.

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Answer by ArkaneX · Nov 18, 2013 at 03:24 PM

You have to declare class wide variable instead of variable declared inside method (e.g. Update).

JS:

 var key1 : boolean;
 
 function Update()
 {
     key1 = Input.GetKeyDown(KeyCode.Alpha1);
 }

C#:

 public bool key1;
 
 void Update()
 {
     key1 = Input.GetKeyDown(KeyCode.Alpha1);
 }

EDIT: although, I have to admit, result of Input.GetKeyDown is probably not a best example :)

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avatar image Crystalline · Nov 18, 2013 at 03:39 PM 0
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Well,thats not what I mean, What I mean is: I have defined in a script var x = 2; , then i want to go into another script and just if x==2 then do that, all without having to copy/define.

avatar image ArkaneX · Nov 18, 2013 at 03:47 PM 0
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I'm afraid without a bit of code it is not possible. You have to somehow access the variable from another script. Assu$$anonymous$$g both scripts are attached to the same game object, you can do (C# version only):

 private OtherScript _otherScript;
 
 public int ValueInOtherScript
 {
     get { return _otherScript.value; }
 }
 
 void Awake()
 {
     _otherScript = GetComponent<OtherScript>();
 }
 
 void Update()
 {
     if (ValueInOtherScript == 2)
     {
         // do something
     }
 }

But I don't know if that's what you need...

avatar image Hoeloe · Nov 18, 2013 at 05:59 PM 1
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You can make the value static if you're using C#, and if you also make it public, you can access it from anywhere without having to have that object instantiated.

avatar image Eric5h5 · Nov 18, 2013 at 06:11 PM 0
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static doesn't have anything to do with C#, but you shouldn't use it if you don't know what it does. Namely, it means there can only be a single instance, so if you have two scripts with a static variable, it will always share the same value.

avatar image Crystalline · Nov 18, 2013 at 11:03 PM 0
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Ok,thanks for answers, I see that it is not quite possible.

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