station_obscurum_unity/Assets/Scripts/Interactable/ItemSelector.cs

using UnityEngine;

public class ItemSelector : MonoBehaviour
{
    public static ItemSelector instance;

    [SerializeField] private Camera cam;

    [SerializeField] private LayerMask mask;

    [SerializeField] private float range = 1;

    public InteractableItem Selected { get; private set; }

    // Start is called before the first frame update
    private void Start()
    {
        instance = this;
    }

    // Update is called once per frame
    private void Update()
    {
    }

    private void FixedUpdate()
    {
        var ray = cam.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;

        if (Physics.Raycast(ray, out hit, range, mask))
        {
            if (Selected != null || hit.transform.gameObject == null) Selected.Disable();

            Selected = hit.transform.gameObject.GetComponent<InteractableItem>();
            Selected.Enable();
            print(Selected);
        }
        else
        {
            if (Selected != null) Selected.Disable();
        }
    }
}