Help with Galaga Remake

Help
1

Godot Version

Godot 4

Question

I’m trying to make a galaga remake in Godot, but my code for having the enemies randomly spawn is not working. I have an enemy spawner scene with a node called SpawnPositions. The children of that node are four Marker2Ds that I have placed where I want the enemies to spawn. When I run the code, the enemies are only spawning on the bottom of the screen, not at all four locations. I have the code I am using below. Help is appreciated, thanks!

If you share code, please wrap it inside three backticks or replace the code in the next block:

extends Node2D

@export var enemy_scene: PackedScene = preload("res://images/enemy.tscn")

var spawn_positions: Array[Node] = []

func _ready():
	randomize()
	spawn_positions = $SpawnPositions.get_children()
	$SpawnTimer.start()

func spawn_enemy():
	if spawn_positions.is_empty():
		print("No spawn positions")
		return

	var index = randi_range(0, spawn_positions.size() - 1)
	var enemy = enemy_scene.instantiate()
	enemy.global_position = spawn_positions[index].global_position
	add_child(enemy)

func _on_spawn_timer_timeout():
	spawn_enemy()
2

You can’t set the global position of the enemy before it’s added to the scene tree, it doesn’t have a concept of a global position yet.

3

The enemy is in a different scene.

4

Swap these two lines

	enemy.global_position = spawn_positions[index].global_position
	add_child(enemy)
5

It’s doing the same thing still.

6

What does the node tree of the enemy scene look like?

7

Area2D with a Sprite2D and a CollisionPolygon2D as the children.

8

This code could return the same index repeatedly:
var index = randi_range(0, spawn_positions.size() - 1)

You have to check that it is actually getting a range of indexes.
Once again I recommend using seed(n) where n is a known value until you have working code.
seed(n) will ensure that calls to randi() will return the same set of random numbers. This is very helpful for debugging.

func _ready():
	#randomize()
    seed(0)
9

Or just cycle through the entire array one by one using a for loop and an index. Just to make sure all the spawn positions are working correctly first.

10

Print spawn positions before assigning them to the enemy.

Post scene structure screenshots of the enemy and the main scene.
Post a screenshot of the remote scene tree at runtime.