Godot Version
4.6.1
Question
Hi. I am attempting to convert my inventory to global scenes. I added them and since then my game is bricked and will not run from errors.
Error 1
insert: Invalid access to property or key ‘inventorySlot’ on a base object of type ‘Nil’.
Error 2
slot_gui.gd:16 @ insert(): Required object “rp_child” is null.
code
extends Button
#from makertech vid #2
@onready var SlotBackground: Sprite2D = $"slot background"
@onready var container: CenterContainer = $CenterContainer
var inventorySlot: InventorySlot
@onready var inventory := preload("res://resource items/chest_inventory_1.tres")
var itemStackGui: = StackGui
var index: int
#adds itemStackGui to the container
func insert(isg: ItemStackGui) -> void:
itemStackGui = isg
container.add_child(itemStackGui)
#need to fix bug here when moving item to a spot not in the array
#because the spots are not yet unlocked
if !itemStackGui.inventorySlot || inventory.slots[index] == itemStackGui.inventorySlot:
return
inventory.insert_slot(index, itemStackGui.inventorySlot)
#vid 2 click and move from inventory maker tech
#removes itemStackGui from the scene
func take_item():
var item := itemStackGui
inventory.remove_slot(itemStackGui.inventorySlot)
container.remove_child(itemStackGui)
itemStackGui = null
return item
func is_empty():
return !itemStackGui
other global script called by slots script
extends Panel
class_name ItemStackGui
@onready var InventoryItemSprite: Sprite2D = $"inventory item"
@onready var AmountLabel: Label = $Label
var inventorySlot: InventorySlot
#adds item texture to inventory and amount label
func update() -> void:
if !inventorySlot || !inventorySlot.item: return
InventoryItemSprite.visible = true
InventoryItemSprite.texture = inventorySlot.item.item_texture
if inventorySlot.amount > 1:
AmountLabel.visible = true
AmountLabel.text = str(inventorySlot.amount)
else:
AmountLabel.visible = false
extends Control
#maker tech #1
class_name InventoryGUI
signal opened
signal closed
var isOpen: bool = false
#preloads player inventory array resource
@onready var inventory: Inventory = preload("res://resource items/player_inventory.tres")
@onready var slots: Array = $"Inventory Image/MarginContainer/GridContainer".get_children()
var ItemStackGuiClass := StackGui
#preload("res://scenes/inventory/item_stack_gui.tscn")
var itemInHand: ItemStackGui
#from makertech vid #2 calls the updated signal in inventory script
func _ready() -> void:
connect_slots()
inventory.updated.connect(update)
update()
#connects the slot to the signal maybe
func connect_slots() -> void:
for i in range(slots.size()):
var slot = slots[i]
slot.index = i
var callable := Callable(on_slot_clicked)
callable = callable.bind(slot)
slot.pressed.connect(callable)
#update the slots size checks the number in the array
func update() -> void:
for i in range(min(inventory.slots.size(), slots.size())):
var inventorySlot: InventorySlot = inventory.slots[i]
if !inventorySlot.item: continue
var itemStackGui: ItemStackGui = slots[i].StackGui
if !itemStackGui:
itemStackGui = ItemStackGuiClass.instantiate()
slots[i].insert(itemStackGui)
itemStackGui.inventorySlot = inventorySlot
itemStackGui.update()
func open() -> void:
visible = true
isOpen = true
opened.emit()
func close() -> void:
visible = false
isOpen = false
closed.emit()
#functionality for moving items in inventory
#inserts the item into the new slot if empty also calls the stack items if its the same item name
func on_slot_clicked(slot) -> void:
if slot.is_empty():
if !itemInHand: return
insert_item_in_slot(slot)
return
if !itemInHand:
take_item_from_slot(slot)
return
if slot.itemStackGui.inventorySlot.item.item_name == itemInHand.inventorySlot.item.item_name:
stack_items(slot)
return
swap_items(slot)
#picks up item into itemInHand
func take_item_from_slot(slot) -> void:
itemInHand = slot.take_item()
add_child(itemInHand)
update_item_in_hand()
#removes item from itemInHand
func insert_item_in_slot(slot) -> void:
var item = itemInHand
remove_child(itemInHand)
itemInHand = null
slot.insert(item)
#swaps the items in the slot to the in hand
func swap_items(slot) -> void:
var tempItem = slot.take_item()
insert_item_in_slot(slot)
itemInHand = tempItem
add_child(itemInHand)
update_item_in_hand()
#stacks items when moved taking into account the max allowed per stack
func stack_items(slot) -> void:
var slotItem: ItemStackGui = slot.itemStackGui
var maxAmount = slotItem.inventorySlot.item.max_amount_stack
var totalAmount = slotItem.inventorySlot.amount + itemInHand.inventorySlot.amount
if slotItem.inventorySlot.amount == maxAmount:
swap_items(slot)
return
#when the total amount is less than max changes the total amount and takes it out of the hand
if totalAmount <= maxAmount:
slotItem.inventorySlot.amount = totalAmount
remove_child(itemInHand)
itemInHand = null
else:
#takes the leftover after max amount reached and adds it to hand
slotItem.inventorySlot.amount = maxAmount
itemInHand.inventorySlot.amount = totalAmount - maxAmount
slotItem.update()
if itemInHand: itemInHand.update()
#when item is in hand it moves with the mouse
func update_item_in_hand() -> void:
if !itemInHand: return
itemInHand.global_position = get_global_mouse_position() - itemInHand.size / 2
func _input(event: InputEvent) -> void:
update_item_in_hand()
