Small snippets of UnityScript

CountChildren

Input : a transform
Output : Number of children all hierarchy levels down.
Interesting : Use of recursion.

Code (csharp):

1.  
2. function countChildren(tr : Transform):int
3. {
4.     var i : int  = 0;
5.     var t : Transform;
6.    
7.     for ( t in tr )
8.     {
9.         i += countChildren(t) + 1;
10.     }
11.  
12.     return i;
13. }
14.  

 

How to make a custom class that exposes its fields in the inspector

Code (csharp):

1.  
2. //Allows you to add this script to a GO, make sure you
3. //name the script with the same name (e.g. in this example myDummyClass)
4. public class myDummyClass extends MonoBehaviour
5. {
6.     //The above instance shows in the inspector
7.     public var myClassInstance : myClass;
8.     //Allows the inspector to see inside your custom class
9.     public class myClass extends System.Object
10.     {
11.         public var nameField : String = "My Class Name field value";
12.     }
13. }
14.  

 

Properties in js (Thanks again Neil - Mike )

Code (csharp):

1. public class myDummyClass extends MonoBehaviour
2. {
3.     public var myClassInstance : myClass;
4.    
5.     public class myClass extends System.Object
6.     {
7.         public var nameField : String = "My Class Name field value";
8.         public var moneyField : int = 0;
9.        
10.          function get HasMoneyProperty():boolean
11.         {
12.             return moneyField > 0;
13.         }
14.     }
15.    
16.     function Start()
17.     {
18.         myClassInstance = new myClass();
19.         myClassInstance.moneyField = 10;
20.         Debug.Log(myClassInstance.moneyField.ToString());
21.         Debug.Log(myClassInstance.HasMoneyProperty.ToString());
22.         myClassInstance.moneyField = 0;
23.         Debug.Log(myClassInstance.moneyField.ToString());
24.         Debug.Log(myClassInstance.HasMoneyProperty.ToString());
25.     }
26. }

 

Regarding the previous script, wouldn't you just do:

Code (csharp):

1. public class MyClass
2. {
3.     public var nameField : String = "My Class Name field value";
4. }
5.  
6. var foo : MyClass;

?

Regarding properties, I think this would work better:

Code (csharp):

1. public class MyClass
2. {
3.     public var nameField : String = "My Class Name field value";
4.     public var moneyField : int = 5;
5.     function get hasMoneyProperty() : boolean
6.     {
7.         return moneyField > 0;
8.     }
9. }
10.  
11. var foo : MyClass;

Also note my bugfix in the getter.

--Eric

 

Thanks Eric

 

So I tried doing properties in Unityscript quite some time ago, failed completely, and figured it was just impossible.
Turns out you can only declare get functions inside a class.

As in, you have to explicitly have a class:

Code (csharp):

1. class Mine extends MonoBehaviour {
2.   function get property() : int { return 1; }
3. }

If you remove the class declaration, suddenly 'get' is an unexpected token (even though... I'm declaring a class by simply having the script exist).