Changing from main menu to secondary menu broke level loading

[final plover]

So i am trying to make a level manager that I saw in a tutorial and far as I can tell I followed everything correctly. The main menu shows but the moment I click play it just dies. if any other screenshots or information is needed to help me wrap my head around this let me know.

I have had to watch several different people for different things. Everything was working until I tried to make this LevelManager.

For reference the video I watched for LevelManager
https://www.youtube.com/watch?v=mKlKMBSM2Ss&ab_channel=MuddyWolf

[civic inlet]

We need to see your level data resource code

[final plover]

Alright. Anything else that might be helpful?

[civic inlet]

Not sure that's just what the error message said

[final plover]

I got both scripts that have level in the name just in case.

[civic inlet]

Yeah so your LevelData resource doesn't have a property "level".

I don't see where the actual line the error is on but I'm guessing you skipped a step or renamed a variable

Yeah your level data has a level property but not vice versa

[final plover]

i just back through the tutorial looking for the level_data script and the "level" in it just the ones above.

so im not sure what to put where to fix it

[civic inlet]

Okay what line is throwing that error about LevelData not having a level property?

But yeah the way it's set up currently you can't get the level from the LevelData only it's path

[final plover]

so the errors are:
line 7 in main_menu
line 18 and 37 from LevelManager

[civic inlet]

Oh I see it now

Line 37

lvl.level_id not lvl.level.id

[final plover]

Wow. 🤦‍♂️

I feel like an idiot

Thank you i fought with it for over an hour.

[civic inlet]

It's okay that's how you learn better next time. Not wanting to look silly is a powerful motivator. 😛
But nah I've made similar mistakes. It's a question of learning to read the error and follow through step by step until you squish it.

You're welcome. You got this. Now go back to the fun part 🙂

[final plover]

considering this is the first project, second day not used to any of it yet. Tho thank you so much.

[civic inlet]

You'll get there. You're very welcome. 🙂

[final plover]

Can I bug you with a new problem?

[civic inlet]

Sure. 🙂

[final plover]

ok so what I did was move a level loading from the main menu to a new sub menu. I thought that everything was fine.

[final plover]

I made a new difficulty menu and reattched the level

i copy pasted what i thought i needed. like the deactive stuff and had things done the same way

[civic inlet]

You freed your main scene

[final plover]

im not sure what that means or how i did it

[final plover]

how? i didnt mess with it until it gave an error

[civic inlet]

Is game_main_scene an autoload?

Or I guess what is it. Can you maybe show me the part where you leave a level?

[final plover]

like when u first start up the game?

leave a level?

i dont have transitions or anything yet. so far they are all separate

[final plover]

this is the main scene that gets loaded

[civic inlet]

This error says you free the main scene at some point

[final plover]

im just not sure where.

[civic inlet]

You're looking for calls to game_main_scene.free() or queue_free()

[final plover]

game main

i have a few queue_free() but those are under func _on_body_entered for killzone, coin, and slime

level manager

[final plover]

so far thats all the scripts

if you want the ones for coin etc i can get those

[civic inlet]

Can you copy paste LevelManager with the markup?

[final plover]

markup?

[earnest prism]

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Feb 2, 2025, 6:14 PM

[civic inlet]

The swift thing

[final plover]

`extends Node

var levels : Array[LevelData]

var game_main_scene : Node2D = null
var loaded_level : Level = null

func unload_level() -> void:
if is_instance_valid(loaded_level):
loaded_level.queue_free()

loaded_level = null

func load_level(level_id : int) -> void:
print("Loading Level: %s" % level_id)
unload_level()

var level_data = get_level_data_by_id(level_id)

if not level_data:
    return

var level_path = "res://scenes/%s.tscn" % level_data.level_path
var level_res := load(level_path)

if level_res:
    loaded_level = level_res.instantiate()
    
    game_main_scene.add_child(loaded_level)
else:
    print("Level does not exist!")

func get_level_data_by_id(id : int) -> LevelData:
var level_to_return : LevelData = null

for lvl : LevelData in levels:
    if lvl.level_id == id:
        level_to_return = lvl

return level_to_return

`

like that?

[civic inlet]

Okay when does game_main_scene get assigned? 🤔

[final plover]

bottom 1/3?

this is game_main:

`extends Node

@export var available_levels : Array[LevelData]

@onready var _2d_scene = $"2DScene"

func _ready() -> void:
LevelManager.game_main_scene = _2d_scene
LevelManager.levels = available_levels
`

[civic inlet]

Okay we're getting there

What's 2DScene?

[final plover]

just a basic 2dscene in the main one

basically meant to easier load/unload levels

the only change i know of between it working and not working is i made 2 new UI screens and the scripts for them. I moved the level trigger from one script to another, and added a folder for the level and renaimed it. I also edited that info in the array already.

I can show file paths if that makes any difference.

[civic inlet]

Nah I'm stumped tbh

[final plover]

Hmm. Like all ive done was move 2 sets of code from main menu to diffculty menu.

I can move a set of code back to see what happens

But that code was the deactivate

[civic inlet]

Yeah or show me what code you moved

[final plover]

func deactivate() -> void: hide() set_process(false) set_physics_process(false) set_process_unhandled_input(false) set_process_input(false)

and

func _on_knight_pressed() -> void: print("Knight pressed") LevelManager.load_level(1) deactivate()

went from main menu to difficulty menu

[civic inlet]

Yeah can't see how that would do it.

[final plover]

i move both those back and it works again...

well not the on knight press

but yeah

the button is a different name

main menu now (Works)

`class_name MainMenu
extends Control

func _on_tutorial_pressed() -> void:
print("Tutorial pressed")
get_tree().change_scene_to_file("res://scenes/levels/tutorial_level_00.tscn")

func _on_start_game_pressed() -> void:
print("Start pressed")
LevelManager.load_level(1)
deactivate()

func _on_options_pressed() -> void:
print("Options pressed")

func _on_credits_pressed() -> void:
print("Credits pressed")
get_tree().change_scene_to_file("res://scenes/UI/credits_screen.tscn")

func _on_exit_pressed() -> void:
print("Exit pressed")
get_tree().quit()

func deactivate() -> void:
hide()
set_process(false)
set_physics_process(false)
set_process_unhandled_input(false)
set_process_input(false)`

versus main menu not work:

`class_name MainMenu
extends Control

func _on_tutorial_pressed() -> void:
print("Tutorial pressed")
get_tree().change_scene_to_file("res://scenes/levels/tutorial_level_00.tscn")

func _on_start_game_pressed() -> void:
print("Start pressed")
get_tree().change_scene_to_file("res://scenes/UI/difficulty_menu.tscn")

func _on_options_pressed() -> void:
print("Options pressed")

func _on_credits_pressed() -> void:
print("Credits pressed")
get_tree().change_scene_to_file("res://scenes/UI/credits_screen.tscn")

func _on_exit_pressed() -> void:
print("Exit pressed")
get_tree().quit()
`

maybe i need to switch it to activate?

nope that didnt help

[final plover]

so above is when it works and when it doesnt. thats the change.