How to make Usable component keep events in prefab

[darkdollgames]

Is there a way to keep events in the usable component stored in the prefab? I often reference my player, but these events wont' save in the prefab. I understand that the references can be scene dependant, so can I create some sort of reference class or something and attach it to the object the usable is on, to hold reference to the player, or do I need to modify the Usable component somehow?

[Tony Li]

Hi,

If you need to do something on the player when a conversation starts, please see 07:00 of the Interaction Tutorial. You probably don't need to do anything on the Usable.

Otherwise, you'll need to create a script that connects references at runtime. Here's a hypothetical example:

Code: Select all

[RequireComponent(typeof(Usable))]
public class ConnectUsableEvents : MonoBehaviour
{
    void Start()
    {
        var usable = GetComponent<Usable>();
        usable.events.onUse.AddListener(PlayAudioOnUse);
    }
    void PlayAudioOnUse()
    {
        AudioManager.Instance.PlayUseSound();
    }
}

[darkdollgames]

Example: A chest. I have a usable component attached to the chest, and I have a method on my player that I call from the OnUse, which rotates the player towards the chest and triggers and animation.

So in your example below, this is what I need to do?

[Tony Li]

If you can make a global reference to your Player script (for example), something like:

Code: Select all

public class Player : MonoBehaviour
{
    public static Player Instance { get; set; }
    
    void Awake()
    {
        Instance = this;
    }
    
    public void PlayInteractionAnimation(GameObject usableObject)
    {
        transform.LookAt(usableObject.transform);
        GetComponent<Animator>().Play("interact");
    }
    ...

(That's just example code. You won't want to exactly use transform.LookAt() like that since it will probably also tilt the player.)

Then you can do something like:

Code: Select all

[RequireComponent(typeof(Usable))]
public class UsableChest : MonoBehaviour
{
    void Start()
    {
        var usable = GetComponent<Usable>();
        usable.events.onUse.AddListener(MakePlayerInteract);
    }
    void MakePlayerInteract()
    {
        Player.Instance.PlayInteractionAnimation(this.gameObject);
    }
}