Topic was automatically imported from the old Question2Answer platform.
Asked By
crotron
I have a scene, “Map.tscn”, made up of a TileMap node. Attached to this node is a script, “Map.gd”. The code inside this script looks something like the following:
Basically, I made my own function inside this script to facilitate its initialization, since I expect there to be many more variables that I’ll have to initialize with later on.
Then, in my game, I have some code that does the following:
onready var map_class = preload("res://Map.tscn")
func _ready():
# some code to determine tiles, width, height
var new_map = map_class.instance()
new_map._init(tiles,width,height)
I expected that this would create my Map scene with my Map script attached to it and call the _init function I defined in that script. Instead, it crashes and tells me “Invalid call. Nonexistent function ‘_init’ in base ‘TileMap’.”
What am I doing wrong?
If I recall, the base nodes can’t be called in that fashion. It may be better creating a class, and putting the initialization function in there.
My initial thought, which most people will encounter at some point, was this could be fixed with node.call_deferred() as mentioned here and here.
However, I believe your issue is that you are trying to overload the built in init() function with one that has arguments and GDScript doesn’t like that. The easiest solution for you is to just create a custom method in your tile map class (e.g. init_map(a, b, c)) and plug that in to your code above. Also, don’t forget to add your map as a child =)
extends Node2D
var map_class = preload("res://Map.tscn")
func _ready():
# some code to determine tiles, width, height
var new_map = map_class.instance(tiles,width,height)
Unfortunately, this won’t work with a PackedScene. If it was just a class (Map.gd), then map_class.new(tiles, width, height) would work like a champ.
2D||!2D | 2018-09-10 15:49
You are correct. I had not realized there was a difference.
For those getting the “Invalid call, Nonexistent function” error while working on plugin stuff for the editor, this error could mean that your script doesn’t have “tool” at the top of it.
Your answer has saved me twice in one week - I forgot about it the second time. Thanks for sharing it - you’ve saved me hours of headaches.
Rollie | 2021-02-04 16:08
What’s weird is I called has_method and it returned true even though I forgot tool ?!?
