week3 prep includes bullet pool, finite state machine, sprites and animation

scripts/scene_manager.gd

@@ -2,14 +2,19 @@ class_name SceneManager extends Node2D
 
 @onready var triggers: Node2D = $"../Triggers"
 @onready var game: GameController = $".."
-@onready var bullet: Bullet = $"../Bullet"
+@onready var player: Player = $"../Player"
+
+var bullet = preload("res://scenes/bullet.tscn")
+
+var bulletArray:Array[Bullet] = []
+var totalAllowedBullets:int = 7
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	buildLevel()
-	game.teleportSignal.connect(teleport)
-	bullet.bulletDamageSignal.connect(game._on_bullet_hit)
-
+	game.teleportSignal.connect(teleport)	
+	game.destroySignal.connect(destroy)
+	player.shootSignal.connect(makeBullet)
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
@@ -29,3 +34,38 @@ func teleport(body, _bodyposition=null)->void:
 				var random_y = randf_range(0, viewport_size.y)
 				var newPosition = Vector2(random_x, random_y)
 				body.teleport_to(newPosition)
+
+func bulletFactory()->Bullet:
+	var myBullet:Bullet
+	#how many bullets have been produced?
+	if bulletArray.size() <= totalAllowedBullets:
+		#make a new bullet
+		myBullet = bullet.instantiate()
+		add_sibling(myBullet)
+		if not myBullet.bulletDamageSignal.is_connected(game._on_bullet_hit):
+			myBullet.bulletDamageSignal.connect(game._on_bullet_hit)
+	else:
+		myBullet = bulletArray.pop_back()
+		
+	bulletArray.push_front(myBullet)
+	return myBullet
+func makeBullet(spawnPosition, speed)->void:
+	print("make bullet")
+	var myBullet:Bullet = bulletFactory()
+	myBullet.transform = spawnPosition
+	myBullet.setSpeed(speed)
+	myBullet.set_process(true)
+
+func stash(bullet:Bullet)->void:
+	#hide it off-screen, remove from game loop
+	var stashPosition:Vector2 = Vector2(-100,-100)
+	bullet.position = stashPosition
+	bullet.setSpeed(0)
+	bullet.set_process(false)
+	
+func destroy(body)->void:
+	if body is Crate:
+		body.queue_free()
+	if body is Bullet:
+		#stash the bullet - save memory!
+		stash(body)