How do I change public variables depending on which level?

Question

I have this script AnimalContainer:

     public SheepFunctions a1;
     public BirdFunctions a2;
     public CowFunctions a3;
     public PigFunctions a4;
 
     void Start () {
         a1 = gameObject.AddComponent<SheepFunctions>();
         a2 = gameObject.AddComponent<BirdFunctions>();
         a3 = gameObject.AddComponent<CowFunctions>();
         a4 = gameObject.AddComponent<PigFunctions>();
     }
 
     //ANIMAL 1
 
     public void Animal1Shape()
     {
         a1.ChangeShape();
     }
 
     public void Animal1Update()
     {
         a1.UpdateFunctions();
     }
 
     public void Animal1Ability()
     {
         a1.Ability();
     }

These are the circumstances I want for level1 (scene 1).

In level2 I would like the public variables and the Start() content to be changed to the following:

     public FoxFunctions a1;
     public TurtleFunctions a2;
     public DinoFunctions a3;
     public HorseFunctions a4;

     void Start () {
     a1 = gameObject.AddComponent<FoxFunctions>();
     a2 = gameObject.AddComponent<TurtleFunctions>();
     a3 = gameObject.AddComponent<DinoFunctions>();
     a4 = gameObject.AddComponent<HorseFunctions>();
     }

Also, I can't just make another script for each level. Because this class is loaded from the PlyaerController, like this:

     ac = gameObject.AddComponent<AnimalContainer>();

How can I solve my problem, when I can't make "if-statements" at the variable declaration section? Been speculating all day now!

EDIT: Is it possible to convert a type, such as C# class into another C# class, because that might do it. Something like:

 a4 = a4 as HorseFunctions;

I know this doesn't work, it says, Cannot convert type PigFunctions' to SheepFunctions' via a built-in conversion. But I hope you get the idea?

Answer 1

Best Answer

Answer by _travistx · Aug 18, 2014 at 04:31 AM

It sounds like you would benefit from making your classes inherit from an interface. Something like this:

 public interface IAnimalFunctions
 {
     void ChangeShape();
     void UpdateFunctions();
     void Ability();
 }

Then in each of the animal functions, inherit from this interface:

 public class SheepFunctions : IAnimalFunctions
 {
     public void ChangeShape()
     {
     }
 
     public void UpdateFunctions()
     {
     }
 
     public void Ability()
     {
     }
 }

And then in your AnimalController, you can do this:

     public IAnimalFunctions a1;
     public IAnimalFunctions a2;
     public IAnimalFunctions a3;
     public IAnimalFunctions a4;
  
     void Start () {
         a1 = gameObject.AddComponent<SheepFunctions>();
         a2 = gameObject.AddComponent<BirdFunctions>();
         a3 = gameObject.AddComponent<CowFunctions>();
         a4 = gameObject.AddComponent<PigFunctions>();
     }

I hope this helps. If you'd like to know more, you might want to do some reading about object oriented programming.

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GimLee · Aug 18, 2014 at 06:52 PM 0

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When I do exactly as you described here. I get the following error: Assets/Scripts/AnimalContainer.cs(16,33): error CS0309: The type SheepFunctions' must be convertible to UnityEngine.Component' in order to use it as parameter T' in the generic type or method UnityEngine.GameObject.AddComponent()'

I will try to read up on inheritance

GimLee · Aug 18, 2014 at 06:57 PM 0

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Ah ok, fixed it now. Thanks for this great tip.

Just had to change this: public class SheepFunctions : $$anonymous$$onoBehaviour, IAnimalFunctions {

How do I change public variables depending on which level?

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