Resolved Start void on variable value changed.

Hello,
I would like to be able to start a void everytime the value of a variable under a certain script changes, and if possible, even send which variable changed to the void.

Like in this photo. When the height changes, a script should detect this change and start a void by sending which variable value changed.

Thank you.

 

First thing to note that 'void' is the return type of a method/function that returns nothing. Call them methods in the context of C#.

What you're asking for is called a 'callback', which is best accomplished in C# with something called a delegate.

Though it's easiest to use the pre-supplied delegates such as

System.Action

.

Basic example:

Code (CSharp):

1. public class MainObject : Monobehaviour
2. {
3.     [SerializeField]
4.     private string _name;
5.    
6.     public string Name
7.     {
8.         get => _name;
9.         set
10.         {
11.             _name = value;
12.             OnNameChanged?.Invoke(_name);
13.         }
14.     }
15.    
16.     public event Action<string> OnNameChanged;
17. }
18.  
19. // usage
20. mainObject.OnNameChanged += PrintNewName;
21. mainObject.Name = "New Name";
22.  
23. private void PrintNewName(string name)
24. {
25.     Debug.Log("New name is: " + name);
26. }

Spend some time learning how to use delegates, as they are getting into strong intermediate territory.

 

Though spiney's suggestion is the better route, another option is the following. As the saying goes, there are many ways to skin a cat.

Code (CSharp):

1. public OcTree ocTree;
2. float ocTreeHeight;
3.  
4. void Start () {
5.     ocTreeHeight = ocTree.height;
6. }
7.  
8. void Update () {
9.     if (ocTreeHeight != ocTree.height) {
10.         ocTreeHeight = ocTree.height;
11.         PrintHeight (ocTree.height);
12.     }
13. }
14.  
15. void PrintHeight (float height) {
16.     print (height);
17. }

 

Thank you both