station_obscurum_unity/Assets/Scripts/Item/InteractableItem.cs

using TMPro;
using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(Collider))]
[RequireComponent(typeof(Rigidbody))]
public abstract class InteractableItem : CarryableItem
{
    [SerializeField] private Canvas interactionCanvas;

    [SerializeField] protected bool canPickup;

    private Image[] interaction_images;
    private TMP_Text[] interaction_texts;
    protected bool isEnabled;
    protected float target_alpha;

    public bool CanPickup => canPickup;
    public bool IsEnabled => isEnabled;

    private void Awake()
    {
        BaseAwake();
    }

    private void FixedUpdate()
    {
        BaseFixedUpdate();
    }

    public void Enable()
    {
        //print("Enabled!");
        interactionCanvas.transform.LookAt(GameObject.FindGameObjectWithTag("MainCamera").transform.position);
        interactionCanvas.transform.Rotate(0, 180, 0);
        target_alpha = 1;
        isEnabled = true;
    }

    public void Disable()
    {
        //print("Disabled!");
        target_alpha = 0;
        isEnabled = true;
    }

    public abstract bool Interact();
    public abstract bool Interact(ref Inventory inventory, ref HeavyInteractableItem heavyInvent);

    protected void BaseAwake()
    {
        interaction_texts = interactionCanvas.GetComponentsInChildren<TMP_Text>();
        interaction_images = interactionCanvas.GetComponentsInChildren<Image>();
        foreach (var text in interaction_texts) text.color = new Color(text.color.r, text.color.g, text.color.b, 0);
        foreach (var image in interaction_images)
            image.color = new Color(image.color.r, image.color.g, image.color.b, 0);
    }

    protected void BaseFixedUpdate()
    {
        foreach (var text in interaction_texts)
            text.color = Color.Lerp(new Color(text.color.r, text.color.g, text.color.b, text.color.a),
                new Color(text.color.r, text.color.g, text.color.b, target_alpha), 10 * Time.deltaTime);
        foreach (var image in interaction_images)
            image.color = Color.Lerp(new Color(image.color.r, image.color.g, image.color.b, image.color.a),
                new Color(image.color.r, image.color.g, image.color.b, target_alpha), 10 * Time.deltaTime);
    }
}