station_obscurum_unity/Assets/Scripts/Item/InteractableItem.cs

using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Item
{
    [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);
        }
    }
}