Im implementing a simple scene switcher while learning to program a game. I followed this youtube tutorial and looked to implement it myself.

First was the creation of a global scene switcher, here is mine:

extends Node

var current_scene = null

func _ready() -> void:
    var root = get_tree().root
    current_scene = root.get_child(root.get_child_count() - 1)

func switch_scene(res_path):
    call_deferred("_deferred_switch_scene", res_path)

func _deferred_switch_scene(res_path):
    current_scene.free()
    var s = load(res_path)
    current_scene = s.instantiate()
    get_tree().root.add_child(current_scene)
    get_tree().current_scene = current_scene

Then I implemented a signal in the main town here:

extends Node2D

func _on_house_one_door_body_entered(body):
    SceneSwitcher.switch_scene("res://scenes/house_one.tscn")

When I use the code as is, it results in a grey screen. When I replace “body” with “() -> void:”, the main town works, but the function doesnt work. However I do recieve this error in the debugger when I walk into the door:

emit_signalp: Error calling from signal ‘body_entered’ to callable: ‘Node2D(pallet town.gd)::_on_house_one_door_body_entered’: Method expected 0 arguments, but called with 1.

So I believe it is recognizing the collision.

The player has a characterbody2d and a collisionshape2d, and the door has an area2d and a collisionshape2d with monitoring enabled.