Select Random ScriptableObject

Unity Engine
1

Hi, i’m kinda new with Unity.
So I have a “Loot” object in my scene. I want it to contain some random items. My items are all ScriptableObject like this:

public class Item : ScriptableObject {
    new public string name;
    public Sprite icon;
    public string type;
    public int rarity;

    public virtual void Use() {
        //Use Item
    }
}

Is there a way to pick a random Item from my Assets Folder?

2

Yes there is! It’s pretty simple. Steps:

  1. use Resources.LoadAll<Item>( "PathToMyItemsAssetsFolder/"); to get them all

  2. shuffle that list and iterate through, OR just pick randomly (that’s a game design decision up to you)

Warning: be sure to put those items in their own folder. The reason: if you do a Resources.LoadAll<Item>("SomeCommonFolderOrTheRootFolder/"), Unity will load every single asset into memory one at a time, and only after loading will it check if each one is an Item or not, before only returning the list of Items. This may crash your game if you have a lot of assets in your Resources folder.

3

It’s not working, idk why.
Here are the items in my assets:
7018372--830746--Immagine 2021-04-08 171652.png

I’m trying to print the length of the array to see if it’s filling:

        Item[] allItems = Resources.LoadAll<Item>("Items/");
        Debug.Log(allItems.Length);

But it prints 0
7018372--830749--Immagine 2021-04-08 171722.png

4

Anything and everything you want Resources to see MUST be located somewhere under a folder with the name Resources.