Spawn Entity without overlapping another Entity

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1

Godot Version

4.3

Question

I am trying to spawn an Entity, but before it gets drawn to the screen I want to make sure that it does not overlap with another Entity.

Currently I have this, the entity that will be spawned:

class_name Gate
extends Node2D

@onready var sprite = $Sprite2D

func get_size():
	var size: Vector2 = sprite.texture.get_size()
	
	return size * transform.get_scale()

And this, which spawns the entity:

extends Node2D

## This is called when its time to check whether or not entities overlap
func do_gates_overlap(gate1: Gate, gate2: Gate):
	var rect1 = Rect2(gate1.position, gate1.get_size())
	var rect2 = Rect2(gate2.position, gate2.get_size())
	
	return rect1.intersects(rect2)

As you can see, the do_gates_overlap function needs to access the get_size function of Gate, which in turn needs to access the Sprite2D node of the scene. However, when instantiating the Gate its _ready function has not yet been called, which means Sprite2D is not yet available, causing the other functions to crash.

I have tried calling the _ready function manually after instantiating the entity, but that will cause problems since the function is then executed twice (once by me, once by the engine). It is not shown in the code above, for better clarity, but the _ready function contains some signal registration, which errors when it is executed more then once.

My question: How would I go about checking whether or not my entities overlap, without using any nodes? Or alternatively, how can I disable the automatic execution of the ready function?

2

You can try waiting for the ready signal of the instantiated gate before calling do_gates_overlap(). I’m assuming you already have gate1 and you’re instantiating gate2.

var gate2: Gate = gate_scene.instantiate() as Gate
if not gate2.is_node_ready():
	await gate2.ready
if do_gates_overlap(gate1, gate2):
	# do something
else:
	# do something else
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