issues passing a value form one script to another

Question

Having problems passing a value from one script to another. Here is my script.

I want to pass the currentvalue from my second script to my first script but it's not working, I know i'm doing a simple mistake but its starting to frustration me now.

 //first script
 var currentlevel : int = 0;
     
 function Update (){
     var currentlevel = SwipeControl.currentValue;
 }

 //second script values i want to get. the name of this script is SwipeControl    
 public static var currentValue : int = 0; // current value

Answer 1

Best Answer

Answer by fafase · Mar 23, 2012 at 09:07 PM

Would it be that you are creating twice the same variable. Once as global and once in the update function?

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Answer 2

You need to look at the scope principle. To put it simple, when you create a variable after a "{", it will die when comes the matching "}".

When you create a global variable (not static, global this is important too), it lives the scope of the script. Your var currentLevel as it is now, is created as global and then a new one is created again and dies each frame and the compiler recreates a new one right after but even though it has the same name it is a total different one at a different memory location (I think you would get an error with this using VS and C or C++).

Now, it is different for the functions, they are implemented outside the update but use inside so they can access any variables alive at the time of calling.

Now try this way:

 var currentlevel;
 
 function Update (){
     currentlevel = SwipeControl.currentValue; // here I took var on the front
     Debug.Log(currentlevel);
 }
 
 function OnMouseDown () {
 Debug.Log("mouse enter");
     if (currentlevel == 0){
        Debug.Log("Loading Level");
        Application.LoadLevel(1);
 
     }
 
     else {
 
     if (currentlevel == 1){
        Application.LoadLevel(2);
        }
     }
 }

issues passing a value form one script to another

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