Added in editor warnings when weapons are missing components (Audioplayer, Shot spawn location, projectile PackedScene)

Added functionality for weapons to fire projectiles.

scripts/weapon.gd

@@ -1,13 +1,17 @@
+@tool
 class_name Weapon
 extends Node2D
 
 # constants
 @export var max_ammo = 1
 ## Number of seconds until the weapon can be used again.
-@export var cooldown = 1
-@export var shot: Projectile
+@export var cooldown = 0.1
+@export var shot: PackedScene:
+	set(new_shot):
+		shot = new_shot
+		update_configuration_warnings()
 @export var shot_spawn: Node2D
-@export var audio: AudioStreamRandomizer
+@export var audio: AudioStreamPlayer2D
 
 # gameplay variables
 var ammo
@@ -15,20 +19,52 @@ var timer = 0.0
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
-	ammo = max_ammo
+	if !Engine.is_editor_hint():
+		ammo = max_ammo
+	else:
+		child_entered_tree.connect(_on_child_entered_tree)
+		child_exiting_tree.connect(_on_child_exited_tree)
 
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
-	timer += delta
+	if !Engine.is_editor_hint():
+		timer += delta
+
+func _get_configuration_warnings():
+	var warnings = []
+
+	if shot == null:
+		warnings.append("Please select a projectile scene for the shot variable.")
+	if shot_spawn == null:
+		warnings.append("Please add a Node2D as the muzzle/projectile spawning location for the shot_spawn variable.")
+	if audio == null:
+		warnings.append("Please add an AudioStreamPlayer2D which plays the weapon's audio.")
+	return warnings
+
+func _on_child_entered_tree(node):
+	print_debug("saw a child entering tree: ", node)
+	if node.get_class() == "Node2D":
+		shot_spawn = node
+	if node is AudioStreamPlayer2D:
+		audio = node
+	update_configuration_warnings()
+	
+func _on_child_exited_tree(node):
+	if node == shot_spawn:
+		shot_spawn = null
+	if node == audio:
+		audio = null
+	update_configuration_warnings()
 
 # Creates and returns an instance of the weapon's projectile.
 func shoot() -> Projectile:
+	print_debug("trying to shoot, timer at ", timer, " out of ", cooldown, " ammo at ", ammo, " out of ", max_ammo)
 	if timer > cooldown && ammo > 0:
 		timer = 0
 		var new_shot = shot.instantiate()
 		owner.add_child(new_shot)
-		new_shot.transform = shot_spawn.transform
+		new_shot.transform = shot_spawn.global_transform
 		ammo -= 1
 		audio.play()
 		return new_shot