Weapon display system

[TheMystery_Man]

Godot Version

@onready var weapon_disp_fist = $HUD/"Weapon Fist"
@onready var weapon_disp_pistol = $HUD/"Weapon Pistol"
@onready var weapon_disp_assault = $HUD/"Weapon Assault Rifle"
@onready var weapon_disp_grenade = $HUD/"Weapon Grenade"
@onready var weapon_disp_machine = $HUD/"Weapon Machine Gun"

var weapon_slot = "Fist"

# Weapon textures variables.
const item_fist = preload("res://UI/Items/Hud Fist.png")
const item_pistol = preload("res://UI/Items/Hud Pistol.png")
const item_assault = preload("res://UI/Items/Hud Assault Rifle.png")
const item_grenade = preload("res://UI/Items/Hud Grenade.png")
const item_machine = preload("res://UI/Items/Hud Machine Gun.png")

func _process(delta):
	match weapon_slot:
		"Fist":
			weapon_disp_fist.set_deferred("texture", item_fist)
			
		"Pistol":
			weapon_disp_fist.set_deferred("texture", item_pistol)

Question

I am trying to have my hud display the current weapon in the weapon slot, and I’ve been trying to do this through changing the texture but it doesn’t work.

[hexgrid]

Is there an error, or is it silently failing?

[TheMystery_Man]

an error

[TheMystery_Man]

it says “attempt to call function '‘set_deferred’ in base ‘null instance’ on a null instance”

[hexgrid]

That means weapon_disp_fist isn’t properly initialized. What happens if you do:

func process(delta: float) -> void:
    match weapon_slot:
        "Fist":   $"HUD/Weapon Fist".set_deferred("texture", item_fist)
        "Pistol": $"HUD/Weapon Fist".set_deferred("texture", item_pistol)

[TheMystery_Man]

@hexgrid

"Fist":   $"HUD/Weapon Fist".set_deferred("texture", item_fist)
        "Pistol": $"HUD/Weapon Fist".set_deferred("texture", item_pistol)

it says “cannot call method ‘set_deferred’ on a null value”

[hexgrid]

That means it doesn’t like $HUD/Weapon Fist, which usually means it’s in another part of the scene tree. What does your node hierarchy looks like, and where is this script attached?

To be clear, what I think is happening is something like:

Scene
    Player           << script attached here
    HUD
        Weapon Fist

In that case you’d need $"../HUD/Weapon Fist" to reach that node from Player.

[TheMystery_Man]

Player scene:

HUD scene:

[hexgrid]

Ah, ok, try:

"$HUD/Weapons/Weapon Fist"

You need the full path.

[TheMystery_Man]

dang i forgot

[hexgrid]

It’s easy to forget, and it doesn’t fail until runtime.