[SOLVED] Instantiate GameObject from a ScriptableObject

Hello reader,

Apologees in advance if this is a borderline retarded question to bring up. Been a while since I wrote anything, usually I find answers from other threads, but been banging my head on this one. I'm gonna try to be brief.

I'm trying to make an inventory system, with items, with a hotbar. For the items I use a scriptable object which I put a bunch of information into, as well as a GameObject. So basically on every scriptableobject I put a GameObject prefab into that field in the inspector.

On an OnDrop PointerEventData operation (that is when I in inventory view drop the item on a hotbar slot), I'd like to instantiate this gameobject to my scene, so that it exists in the world and I can toggle it with numkeys to activate the weapon. Also, this specific item that I need instantiated is only referred to through a method.

Below code is what I believe is relevant for the question, I cut out a lot from the full scripts to make it easier, I dare say nothing relevant is left out.

I would be grateful for any help or suggestions. I really am trying to find answers on my own before I ask, and usually it works out. But now I'm stuck for 2 days. Appreciate it.

BR
Tomas

Slot script:

Code (CSharp):

1.    
2. public void AddItem(Item itemToAdd, int amnt)
3.     {
4.         if (itemToAdd == myItem)
5.         {
6.             myAmount += amnt;
7.         }
8.         else
9.         {
10.             myItem = itemToAdd;
11.             myAmount = amnt;
12.         }
13.         ShowUI();
14.     }
15.  
16. public void OnDrop(PointerEventData eventData)
17.     {
18.         // Adds item to the slot in the inventory view
19.         AddItem(inventory.draggingItem, inventory.draggingAmount);
20.         inventory.EndDrag();
21.  
22.         // This I hope will instantiate an item for me, but it returns "Nullreferenceexception: Objects reference not set..."
23.         if(this.gameObject.name.StartsWith("Hot"))
24.         {
25.             GameObject inHand = Instantiate(inventory.draggingItem.item3D, transform.position, Quaternion.identity, this.transform) as GameObject;
26.             Debug.Log("Instantiated item");
27.         }
28.     }

Item class:

Code (CSharp):

1. [CreateAssetMenu]
2. public class Item : ScriptableObject
3. {
4.     //General
5.     public string itemName;
6.     public Sprite itemIcon;
7.  
8.     //Stacking
9.     public bool isStackable;
10.     public int maxStackAmount;
11.  
12.     // the GO field I populate in inspector
13.     public GameObject item3D;
14.  
15. }

Inventory script:

Code (CSharp):

1.  
2.  
3. public class Inventory : MonoBehaviour
4. {
5.     public List<GameObject> slots = new List<GameObject>();
6.  
7.     [HideInInspector]
8.     public bool isDragging = false;
9.     public Image draggingImage = null;
10.     [HideInInspector]
11.     public Item draggingItem;
12.     [HideInInspector]
13.     public int draggingAmount;
14.     private GameObject draggingItem3D;
15.  
16. // the AddItem method referred to in slot script
17.     public bool AddItem(Item itemToAdd, int amount)
18.     {
19.         Slot emptySlot = null;
20.         for (int i = 0; i < slots.Count; i++)
21.         {
22.             Slot currentSlot = slots[i].GetComponent<Slot>();
23.             if (currentSlot.myItem == itemToAdd && itemToAdd.isStackable && currentSlot.myAmount + amount <= itemToAdd.maxStackAmount)
24.             {
25.                 currentSlot.AddItem(itemToAdd, amount);
26.                 return true;
27.             }
28.             else if (currentSlot.myItem == null && emptySlot == null)
29.             {
30.                 emptySlot = currentSlot;
31.             }
32.         }
33.  
34.         if (emptySlot != null)
35.         {
36.             emptySlot.AddItem(itemToAdd, amount);
37.             return true;
38.         }
39.         else
40.         {
41.             print("Inventory is full!!!");
42.             return false;
43.         }
44.     }
45.  
46.     public void DoDrag(Item itemToDrag, int amnt)
47.     {
48.         draggingItem = itemToDrag;
49.  
50.         isDragging = true;
51.         draggingImage.enabled = true;
52.         draggingImage.sprite = draggingItem.itemIcon;
53.         draggingAmount = amnt;
54.         draggingItem3D = draggingItem.item3D;
55.     }
56.  
57.     public void EndDrag()
58.     {
59.         draggingItem = null;
60.         isDragging = false;
61.         draggingImage.enabled = false;
62.         draggingAmount = 0;
63.     }
64. }

 

AAAaand I solved it. I created a new method InstGO()" and put the "if(stringstarts..."Hot" and instantiate code there, then I called that method from within AddItem.

I S*** you not. 2 days. If you read, thanks.