Using scriptableobjects as consumable items?

Question

Currently I'm using a scriptableobject class "Item" to allow me to easily make new items and modify attributes they may have. I also have an inventory that I can easily add items and everyt$$anonymous$$ng I have is working correctly. The problem I'm running into is that I want to override the Use() method so I can have different effects for each item. What is the best way to go about t$$anonymous$$s? Having to reference a gameobject with a script for a particular item doesn't seem desirable, since you would have to have a gameobject for each item, and my inventory is a list of Items and doesn't store gameobjects. Any advice would be appreciated.

[CreateAssetMenu(fileName = "New Item", menuName = "Inventory/Item")]

public class Item : ScriptableObject

{ new public string name = "New Item";

 public string description = "Item Description";
 public bool isDefaultItem = false;

 public virtual void Use()
 {
     //Use the item
     //Somet$$anonymous$$ng might happen

     Debug.Log("Using " + name);
     RemoveFromInventory();
 }

 public void RemoveFromInventory()
 {
     Inventory.instance.Remove(t$$anonymous$$s);
 }

}

Answer 1

Best Answer

Answer by Mouton · Sep 26, 2019 at 10:35 PM

You could ac$$anonymous$$eve your goal with UnityEvents (https://docs.unity3d.com/ScriptReference/Events.UnityEvent.html).

Add a UnityEvent effects field to your class Item , then in the inspector you can define the different effects you require.

 public class Item : ScriptableObject
 {
     public string name;
     public string description;
     public bool isDefaultItem;
     public UnityEvent effects;
          
     public virtual void Use(){
         if (effects != null)
             effects.Invoke();
     }
 }

To define your effects, you can store them in a single class ItemEffects.

 public static class ItemEffects
 {
     public static RestoreHealth()
     {
     }
 
     public static SetDebuff()
     {
     }
 }

You can also pass arguments to your effects with the generic version of Unity events (UnityEvent<T0>) and pass it a struct or a class.

 public class Item : ScriptableObject
 {
     public UnityEvent<MyParams> effects;
          
     public virtual void Use(MyParams params){
         if (effects != null)
             effects.Invoke(params);
     }
 }

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Proclasteus · Sep 28, 2019 at 06:26 AM 0

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Thanks for the response! I was looking at UnityEvent and it seems that is derives from Monobehaviour. Wouldn't that make it incompatible with ScriptableObject? If it doesn't I guess I missed something.

Mouton · Sep 28, 2019 at 08:06 AM 0

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UnityEvents derives from UnityEventBase which is an abstract root class, it doesn't inherit MonoBehaviour.

It would not be a problem since effects is an attribute of the Item class, it will store reference to UnityEvents.

Proclasteus · Sep 28, 2019 at 07:31 PM 0

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I'm not sure why, but when I tried to implement it wasn't showing it in the inspector. But I just put what you suggested again and it worked! I'm not sure what I did wrong the last time. Thanks so much for the help, this feels like setting it up this way will make it scalable.

Mouton Proclasteus · Sep 28, 2019 at 09:40 PM 0

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Great ! Glad it could help you ! :D

Using scriptableobjects as consumable items?

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