added a bullet pool to scene manager

week2/updated_files/scripts/CharacterBody2D.gd

@@ -16,8 +16,6 @@ var pushLeftEnabled = false
 var pushRightEnabled = false
 var pushTarget
 
-var bullet = preload("res://scenes/bullet.tscn")
-
 # Get the gravity from the project settings to be synced with RigidBody nodes.
 var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")
 
@@ -39,10 +37,9 @@ func _physics_process(delta):
 		
 	if Input.is_action_just_pressed("shoot"):
 		#make a bullet
-		var myBullet = bullet.instantiate()
+		var myBullet = %SceneManager.bulletFactory()
 		#set bullet speed?
 		myBullet.transform = marker_right.global_transform
-		%SceneManager.manageBullet(myBullet)
 	# Get the input direction and handle the movement/deceleration.
 	# As good practice, you should replace UI actions with custom gameplay actions.
 	var direction = Input.get_axis("ui_left", "ui_right")

week2/updated_files/scripts/SceneManager.gd

@@ -1,16 +1,27 @@
 extends Node
 
 var bulletsFiredTotal := 0
-# Called when the node enters the scene tree for the first time.
-func _ready():
-	pass # Replace with function body.
+var bulletsMadeTotal := 0
+var bulletArray:Array = []
+
+var bullet = preload("res://scenes/bullet.tscn")
+
+func bulletFactory():
+	var mybullet
+	
+	if bulletArray.size() < 4:
+		mybullet = bullet.instantiate()
+		mybullet.connect("hit", onBulletHit)
+		owner.add_child(mybullet)
+	else:
+		mybullet = bulletArray.pop_back()
+	mybullet.setSpeed(700)
+	bulletArray.push_front(mybullet)
+	bulletsMadeTotal +=1
+	return mybullet
 
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta):
-	pass
-
-func manageBullet(bullet):
-	bulletsFiredTotal +=1
-	owner.add_child(bullet)
-	print("Total bullets fired "+str(bulletsFiredTotal))
+func onBulletHit(bullet, body):
+	#deactivate bullet
+	#put back in queue
+	bullet.setSpeed(1)

week2/updated_files/scripts/bullet.gd

@@ -1,6 +1,7 @@
-extends Area2D
+class_name Bullet extends Area2D
 
 var speed = 750
+signal hit(bullet, body)
 
 func setSpeed(speedVal):
 	speed = speedVal
@@ -12,4 +13,5 @@ func _on_body_entered(body):
 	print("bullet hit something")
 	
 	if not body.is_in_group("player"):
-		queue_free()
+		hit.emit(self, body)
+