bullet factory, object pooling, state machine, animations, npc

scripts/bullet.gd

@@ -1,12 +1,17 @@
 class_name Bullet extends Area2D
 
 var speed:float = 700
-
+signal bulletDamageSignal(body, bullet)
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	pass # Replace with function body.
 
-
+func setSpeed(value)->void:
+	speed = value
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
 	position += transform.x * speed *delta
+
+
+func _on_body_entered(body: Node2D) -> void:
+	bulletDamageSignal.emit(body, self)

scripts/gameController.gd

@@ -11,6 +11,7 @@ var timeAvailable := 10
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
+	get_window().grab_focus()
 	add_child(timer)
 	timer.wait_time = 1
 	timer.one_shot= false
@@ -33,10 +34,6 @@ func _on_trigger(body: Variant, effect, trigger) -> void:
 	if body is Crate:
 		match effect:
 			"destroy":
-				crateTotal -=1
-				if crateTotal <=0:
-					print("You WON!!!")
-					levelChangeSignal.emit(currentScene)
 				destroySignal.emit(body)
 			"teleport":
 				print("GC teleport an object")
@@ -52,3 +49,12 @@ func _on_trigger(body: Variant, effect, trigger) -> void:
 func crateUpdate(cratesAmount)->void:
 	crateTotal = cratesAmount
 	print("GC updated crates: "+str(crateTotal))
+	if crateTotal <=0:
+		print("You WON!!!")
+		levelChangeSignal.emit(currentScene)
+
+func bulletDamage(body:Node2D, bullet:Bullet)->void:
+	if body is Crate:
+		#destroy crate
+		destroySignal.emit(body)
+		destroySignal.emit(bullet)

scripts/npc_character.gd

@@ -0,0 +1,12 @@
+class_name NPCCharacter extends CharacterBody2D
+
+func _physics_process(delta: float) -> void:
+	if not is_on_floor():
+		velocity += get_gravity() * delta
+		
+	move_and_slide()
+
+func knockBack(direction, duration:float=0.2):
+	velocity = direction
+	await get_tree().create_timer(duration).timeout
+	velocity = Vector2.ZERO

scripts/npc_character.gd.uid

@@ -0,0 +1 @@
+uid://gutmbv5ff4u4

scripts/player.gd

@@ -2,6 +2,7 @@ class_name Player extends CharacterBody2D
 
 @onready var right_target: Marker2D = $RightTarget
 @onready var left_target: Marker2D = $LeftTarget
+@onready var player_graphic: AnimatedSprite2D = $PlayerGraphic
 
 
 const SPEED = 300.0
@@ -9,11 +10,32 @@ const JUMP_VELOCITY = -400.0
 const BUMP_POWER = 50
 enum FaceDirection{LEFT, RIGHT}
 var facing:FaceDirection = FaceDirection.RIGHT
+var direction
+enum PlayerState{IDLE,RUNNING, JUMPING, FALLING}
+var current_player_state:PlayerState = PlayerState.IDLE
+var jumpUp:bool = false
 
 func _physics_process(delta: float) -> void:
-	# Add the gravity.
-	if not is_on_floor():
-		velocity += get_gravity() * delta
+	
+	handle_input()
+	handle_movement(delta)
+	handle_state()
+	handle_animation()
+	move_and_slide()
+	handle_collisions()
+			
+func handle_input()->void:
+	direction = Input.get_axis("ui_left", "ui_right")
+	if direction <0:
+		player_graphic.flip_h = true
+	if direction >0:
+		player_graphic.flip_h = false
+		
+	# Handle jump.
+	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
+		velocity.y = JUMP_VELOCITY
+		current_player_state = PlayerState.JUMPING
+		jumpUp = true
 	# Handle Shoot
 	if Input.is_action_just_pressed("shoot"):
 		print("Player wants to shoot")
@@ -24,14 +46,36 @@ func _physics_process(delta: float) -> void:
 			FaceDirection.LEFT:
 				print("Shoot to the left")
 				%SceneManager.makeBullet(left_target.global_transform, -700)
-		
-	# Handle jump.
-	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
-		velocity.y = JUMP_VELOCITY
-
-	# 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")
+func handle_state()->void:
+	match current_player_state:
+		PlayerState.IDLE when velocity.x !=0:
+			#change to running!!
+			current_player_state = PlayerState.RUNNING
+		PlayerState.RUNNING when velocity.x == 0:
+			current_player_state = PlayerState.IDLE
+		PlayerState.JUMPING when velocity.y > 0:
+			current_player_state = PlayerState.FALLING
+		PlayerState.FALLING when is_on_floor():
+			if velocity.x ==0:
+				current_player_state = PlayerState.IDLE
+			else:
+				current_player_state = PlayerState.RUNNING
+func handle_animation()->void:
+	match current_player_state:
+		PlayerState.IDLE:
+			player_graphic.play("idle")	
+		PlayerState.RUNNING:
+			player_graphic.play("running")
+		PlayerState.JUMPING:
+			if jumpUp:
+				player_graphic.play("jumping")
+		PlayerState.FALLING:
+			player_graphic.play("falling")
+			
+func handle_movement(delta)->void:
+	# Add the gravity.
+	if not is_on_floor():
+		velocity += get_gravity() * delta
 	if direction:
 		velocity.x = direction * SPEED
 		if direction <0:
@@ -40,9 +84,17 @@ func _physics_process(delta: float) -> void:
 			facing=FaceDirection.RIGHT
 	else:
 		velocity.x = move_toward(velocity.x, 0, SPEED)
-
-	move_and_slide()
+func handle_collisions()->void:
 	for i in get_slide_collision_count():
 		var c = get_slide_collision(i)
 		if c.get_collider() is RigidBody2D:
 			c.get_collider().apply_central_impulse(-c.get_normal()*BUMP_POWER)
+		if c.get_collider() is NPCCharacter:
+			var myCharacter:NPCCharacter = c.get_collider()
+			var direction = -c.get_normal()*BUMP_POWER
+			myCharacter.knockBack(direction)
+
+func _on_animation_finished() -> void:
+	match current_player_state:
+		PlayerState.JUMPING:
+			jumpUp = false

scripts/scene_manager.gd

@@ -4,6 +4,9 @@ class_name SceneManager extends Node2D
 @onready var level: Node2D = $"../Level"
 @onready var game: GameController = $".."
 
+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:
@@ -43,6 +46,9 @@ func updateCrates()->void:
 		game.crateUpdate(totalCrates)
 		
 func destroy(body)->void:
+	if body is Bullet:
+		stashBullet(body)
+		return
 	body.queue_free()
 func teleport(body)->void:
 	if body is Crate:
@@ -54,5 +60,29 @@ func teleport(body)->void:
 		
 func loadLevel(level:String)->void:
 	get_tree().call_deferred("change_scene_to_file", level)
+func stashBullet(bullet:Bullet)->void:
+	var stashPosition:Vector2 = Vector2(-100,100)
+	bullet.position = stashPosition
+	bullet.setSpeed(0)
+	bullet.set_process(false)
+	
+func bulletFactory()->Bullet :
+		var myBullet:Bullet
+		#how many bullets have been made?
+		if bulletArray.size() <= totalAllowedBullets:
+			myBullet = bullet.instantiate()
+			if not myBullet.bulletDamageSignal.is_connected(game.bulletDamage):
+				myBullet.bulletDamageSignal.connect(game.bulletDamage)
+			game.add_child(myBullet)
+		else:
+			myBullet = bulletArray.pop_back()
+			
+		bulletArray.push_front(myBullet)
+		return myBullet
 func makeBullet(targetPosition, speed)->void:
 	print("Make a bullet!")
+	print("bullets created: "+str( bulletArray.size() ))
+	var myBullet:Bullet = bulletFactory()
+	myBullet.transform = targetPosition
+	myBullet.setSpeed(speed)
+	myBullet.set_process(true)