How To Access Global Variables Across C# Scripts?

Hi,

We have a global variable called "int ScreenToDisplay" in a C# script called "Initialize"
and are trying to access the above global variable in another C# script called "main"
but it's not being found in "main"?

Assets/scripts/main.cs(34,21): error CS0103: The name `ScreenToDisplay' does not exist in the current context

Do we need to do something to access global variables across C# scripts?
Thanks!

 

Hi,

So did a little more research...
We now have the following 3 C# scripts:

"Initialize.cs":

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class Initialize : MonoBehaviour
5. {
6.     // Use this for initialization
7.     void Start ()
8.     {
9.         Application.targetFrameRate = 60;
10.        
11.     }
12.    
13.     // Update is called once per frame
14.     void Update ()
15.     {
16.    
17.     }
18.  
19. }

"GlobalVariables.cs":

Code (CSharp):

1. public static class GlobalVariables
2. {
3.     public const int UnityScreen = 0;
4.     public const int SixteenBitSoftScreen = 1;
5.     public const int TitleScreen = 2;
6.     public const int OptionsScreen = 3;
7.     public const int HowToPlayScreen = 4;
8.     public const int HighScoresScreen = 5;
9.     public const int AboutScreen = 6;
10.     public static int ScreenToDisplay = SixteenBitSoftScreen;
11. }

"main.cs":

Code (CSharp):

1.  
2. /*  JeZxLee's
3.  _  _  _  _  _  ___  ______  ______  _  _  _______  _  
4. ( )( )(_)  (_)  (_)  / __)  (_____ \ (______) ( )( )  (_______)  (_)  
5. |/  \| _  _  ____  _  _| |__  _  _  ____) ) _  _ |/  \|  _____  ____  ____  _  ____  _____ TM
6.   | |  | ||  _ \ | |(_  __)| | | | / ____/ | |  | |  |  ___)  |  _ \  / _  || ||  _ \ | ___ |
7.   | |___| || | | || |  | |  | |_| || (_____ | |__/ /  | |_____ | | | |( (_| || || | | || ____|
8.   \_____/ |_| |_||_|  |_|  \__  ||_______)|_____/  |_______)|_| |_| \___ ||_||_| |_||_____)
9.   (____/  (_____|  
10.  
11.   Cross-Platform Unity Based 2-Dimensional Video Game Engine
12.  
13.   (C)opyright 2017 By 16BitSoft Inc.
14.   www.16BitSoft.com
15. _____________________________________________________________________________________________________________
16.  
17.  
18. _____________________________________________________________________________________________________________*/
19. using UnityEngine;
20. using System.Collections;
21.  
22. public class main : MonoBehaviour
23. {
24.    // Use this for initialization
25.    void Start ()
26.    {
27.      Initialize();
28.      
29.    }
30.    
31.    // Update is called once per frame
32.    void Update ()
33.    {
34.  
35.      if (GlobalVariables.ScreenToDisplay == GlobalVariables.SixteenBitSoftScreen)  DisplaySixteenBitSoftScreen();
36.  
37.  
38.  
39.    }
40. }

We now get the following two errors message in Unity IDE:

Code (CSharp):

1. Assets/scripts/main.cs(26,17): error CS0119: Expression denotes a `type', where a `variable', `value' or `method group' was expected
2.  
3. Assets/scripts/main.cs(34,95): error CS0119: Expression denotes a `type', where a `variable', `value' or `method group' was expected

Any idea how to make this work in Unity

 

Geez. I tried running your code and it made Unity lock up and almost took the whole Mac down with it. i have no idea what is wrong here.

 

Hi, we figured it out: needed "new"...but have a new error

 

You should read some tutorials, they will get you started way faster than wondering about things yourself.

For example, in main.Start() you're calling Initialize script as if it was a method. If you added the "new" before "Initialize", that shouldn't work either, since components need to be attached to GameObjects.

https://unity3d.com/learn/tutorials/topics/scripting/coding-unity-absolute-beginner
The tutorials here explain many things, the use of components being the first. Each tutorial there also contains links to related pages, for example the component tutorial has a link to Unity's scripting manual overview. I suggest you start learning the basics from there. I'm sure once you understand the way Unity works on a high level, you'll have no trouble learning the rest.