massive work towards godot 4

scripts/bullet.gd

@@ -0,0 +1,31 @@
+class_name Projectile
+extends Area2D
+
+@export
+var damage: int = 1
+
+@export
+var speed: float = 500
+
+@export
+var lifetime: float = 5
+
+func _ready():
+	self.body_entered.connect(self._on_body_entered)
+
+	var timer: Timer = Timer.new()
+	self.add_child(timer)
+	timer.timeout.connect(func():
+		self.queue_free()
+	)
+	timer.start(lifetime)
+
+func _physics_process(delta: float) -> void:
+	var direction = Vector2.from_angle(rotation)
+
+	self.position += (speed*delta) * direction
+
+func _on_body_entered(body: Node2D) -> void:
+	if body.has_method("take_damage"):
+		body.take_damage(self.damage)
+	self.queue_free()