StellarXipher/Assets/Scripts/GeneratorTask/Generator.cs

using UnityEngine;

public class Generator : MonoBehaviour
{
    public string requiredItemName = "GasTank";
    private bool isFueled = false;

    void Update()
    {
        if (isFueled) return;

        Inventory inventory = FindObjectOfType<Inventory>();
        if (inventory == null) return;

        var heldItem = inventory.slots[inventory.currentSlot];
        if (heldItem != null && heldItem.itemName == requiredItemName && Input.GetMouseButtonDown(0))
        {
            int layerMask = ~LayerMask.GetMask("Player"); // ignore "Player" layer (this is very important to not forget to do in other tasks)
            Ray ray = new Ray(Camera.main.transform.position, Camera.main.transform.forward);
            if (Physics.Raycast(ray, out RaycastHit hit, 3f, layerMask))
            {
                if (hit.transform == transform || hit.transform.IsChildOf(transform))
                {
                    inventory.slots[inventory.currentSlot] = null;
                    inventory.EquipSlot(inventory.currentSlot);

                    isFueled = true;
                    GetComponent<Collider>().enabled = false;

                    Debug.Log("Generator refueled!");
                }
            }
        }
    }
}