moved direction change logic to game-controller

scripts/enemy.gd

@@ -1,19 +1,12 @@
-extends RigidBody2D
+class_name Enemy extends RigidBody2D
 
-var direction = 1
+# there is probably a better built-in to use here
+@export var direction:int = 1
 const SPEED = 1
 
-# signal triggerEdge(body, intentMessage)
-
-
-# Called when the node enters the scene tree for the first time.
 func _ready():
 	pass # Replace with function body.
 
-func _process(delta):
+func _process(_delta):
 	var x = get_transform().get_origin().x
-	# not sure why rigid body doesn't see wall hardcoded walls
-	if x < 0 or x > 300:
-		# triggerEdge.emit(body, )
-		direction *= -1 # switch direction
 	move_local_x(SPEED * direction)

scripts/game-controller.gd

@@ -1,14 +1,23 @@
 extends Node2D
 
+var game_node = null
+
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	get_window().grab_focus() # Replace with function body.
+	game_node = get_tree().root.get_child(0)
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(_delta):
-func _process(delta):
+	# detect when one enemy goes too far
-	pass
+	var change_dir = false
-
+	for child in game_node.get_children():
-func _on_area_2d_trigger_active_signal(body, intentMessage):
+		if child is RigidBody2D:
-	print("game controller received trigger")
+			var x = child.transform.get_origin().x
-	#if intentMessage == "destroy" and not body is Player:
+			if x < 0 or x > 300: # not using collision detection properly
-		#body.queue_free()
+				change_dir = true
+				break
+	# change directions of all enemies
+	if change_dir:
+		for child in game_node.get_children():
+			if child is RigidBody2D:
+				child.mydirection *= -1

space-invaders.tscn

@@ -1,6 +1,7 @@
 [gd_scene format=3 uid="uid://bpno3xoqtrcl8"]
 
 [ext_resource type="Script" uid="uid://cehhkd2b24fhi" path="res://scripts/player.gd" id="1_5oyi1"]
+[ext_resource type="Script" uid="uid://cvax0kvnw574u" path="res://scripts/game-controller.gd" id="1_kv2i2"]
 [ext_resource type="Script" uid="uid://c6x4gdnsnusgk" path="res://scripts/enemy.gd" id="2_kxkvm"]
 
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_qlrl5"]
@@ -13,6 +14,7 @@ size = Vector2(60, 20)
 [sub_resource type="RectangleShape2D" id="RectangleShape2D_5oyi1"]
 
 [node name="Game" type="Node2D" unique_id=1637093307]
+script = ExtResource("1_kv2i2")
 
 [node name="Block" type="StaticBody2D" parent="." unique_id=346683741]
 position = Vector2(117, 416)