adding a 3d version of lesson material

week1/3dVersion/scripts/SceneManager.gd

@@ -0,0 +1,40 @@
+extends Node
+
+var bulletsFiredTotal := 0
+var bulletsMadeTotal := 0
+var bulletArray:Array = []
+
+var bullet = preload("res://scenes/bullet.tscn")
+@onready var gameController: Node3D = $".."
+
+func _ready() -> void:
+	gameController.destroy_signal.connect(destroy)
+#factory decides to issue new bullet, or
+#recycle an old one
+func bulletFactory():
+	var mybullet
+	
+	if bulletArray.size() < 4:
+		mybullet = bullet.instantiate()
+		mybullet.connect("hit", gameController.onBulletHit)
+		owner.add_child(mybullet)
+	else:
+		mybullet = bulletArray.pop_back()
+	mybullet.setSpeed(700)
+	bulletArray.push_front(mybullet)
+	bulletsMadeTotal +=1
+	return mybullet
+
+#order desk for new bullets
+func makeBullet(position, speed):
+	var myBullet = bulletFactory()
+	myBullet.transform.origin = position
+	myBullet.setSpeed(speed)
+	return myBullet
+
+func destroy(body):
+	if body is Crate:
+		body.queue_free()
+	if body is Bullet:
+		bulletArray.erase(body)
+		body.queue_free()

week1/3dVersion/scripts/SceneManager.gd.uid

@@ -0,0 +1 @@
+uid://cj0hc3gbvehgf

week1/3dVersion/scripts/bullet.gd

@@ -0,0 +1,22 @@
+class_name Bullet extends Area3D
+
+var speed = 2
+signal hit(bullet, body)
+
+func setSpeed(speedVal):
+	speed = speedVal
+	
+func _physics_process(delta):
+	#three approaches:
+	#1. update position with a vector3
+	#position += Vector3(speed * delta, 0, 0)
+	#2. update the transform
+	#global_transform.origin += transform.basis.x.normalized() * speed * delta
+	#3. calculate the vector of intended direction
+	var velocity_vector = transform.basis.x * speed
+	position += velocity_vector * delta
+
+
+func _on_body_entered(body: Node3D) -> void:
+	print("bullet hit a thing")
+	hit.emit(self, body)

week1/3dVersion/scripts/bullet.gd.uid

@@ -0,0 +1 @@
+uid://b30inwwjypbrl

week1/3dVersion/scripts/character_body_3d.gd

@@ -3,7 +3,17 @@ extends CharacterBody3D
 
 const SPEED = 5.0
 const JUMP_VELOCITY = 4.5
+const SHOVE_POWER = 9
 
+@onready var right_target: Node3D = $RightTarget
+@onready var left_target: Node3D = $LeftTarget
+@onready var right_cast: RayCast3D = $RightCast
+@onready var left_cast: RayCast3D = $LeftCast
+
+enum FaceDirection{LEFT, RIGHT}
+var facing:FaceDirection = FaceDirection.RIGHT
+
+var pushTarget:RigidBody3D
 
 func _physics_process(delta: float) -> void:
 	# Add the gravity.
@@ -20,13 +30,50 @@ func _physics_process(delta: float) -> void:
 	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
 	if direction:
 		velocity.x = direction.x * SPEED
+		if direction.x>0:
+			facing = FaceDirection.RIGHT
+		if direction.x<0:
+			facing = FaceDirection.LEFT
 		#velocity.z = direction.z * SPEED
 	else:
 		velocity.x = move_toward(velocity.x, 0, SPEED)
 		#velocity.z = move_toward(velocity.z, 0, SPEED)
-
+	if Input.is_action_just_pressed("shoot"):
+		match facing:
+			FaceDirection.RIGHT:
+				%SceneManager.makeBullet(right_target.global_position, 19)
+			FaceDirection.LEFT:
+				%SceneManager.makeBullet(left_target.global_position, -4)
+	if Input.is_action_just_pressed("shove"):
+		print("try to shove")
+		if pushTarget != null:
+			print("shove a crate")
+			var angle
+			if facing==FaceDirection.LEFT:
+				angle = -1
+			else:
+				angle = 1
+			pushTarget.apply_central_impulse(Vector3(angle,0,0) * SHOVE_POWER)
 	move_and_slide()
+	
 	for i in get_slide_collision_count():
 		var collision = get_slide_collision(i)
 		if collision.get_collider() is RigidBody3D:
 			collision.get_collider().apply_central_impulse(-collision.get_normal() * 2)
+	
+	match facing:
+		FaceDirection.LEFT:
+			if left_cast.is_colliding():
+				var collider = left_cast.get_collider()
+				if collider is Crate:
+					pushTarget = collider
+			else:
+				pushTarget = null
+		FaceDirection.RIGHT:
+			if right_cast.is_colliding():
+				var collider = right_cast.get_collider()
+				if collider is Crate:
+					pushTarget = collider
+			else:
+				pushTarget = null
+	

week1/3dVersion/scripts/crate.gd

@@ -0,0 +1 @@
+class_name Crate extends RigidBody3D

week1/3dVersion/scripts/crate.gd.uid

@@ -0,0 +1 @@
+uid://bspjn3hydupee

week1/3dVersion/scripts/gamecontroller.gd

@@ -1,14 +1,6 @@
 extends Node3D
 
-
-# Called when the node enters the scene tree for the first time.
-func _ready() -> void:
-	pass # Replace with function body.
-
-
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
-	pass
+signal destroy_signal(body)
 
 func onAreaEntered(effect, obj) -> void:
 	if effect == "destroy":
@@ -16,3 +8,10 @@ func onAreaEntered(effect, obj) -> void:
 		obj.queue_free()
 	elif effect == "powerUp":
 		print("power up the object")
+		
+func onBulletHit(bullet, body):
+	print("GC knows bullet hit")
+	if body is Crate:
+		print("hit a crate")
+		destroy_signal.emit(body)
+		destroy_signal.emit(bullet)