Add camera system

scripts/Player.gd

@@ -10,7 +10,7 @@ var item_in_hand
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
-	pass # Replace with function body.
+	$hitbox.set_meta("owner", self)
 
 func _physics_process(delta):
 	var input = Vector3(Input.get_axis("left", "right"), 0.0, Input.get_axis("up", "down"))

scripts/camera_room.gd

@@ -0,0 +1,18 @@
+extends Spatial
+signal player_entered(player, camera)
+signal player_exited(player, camera)
+
+func _on_hitbox_area_entered(area):
+	var owner = area
+	if area.has_meta("owner"):
+		owner = area.get_meta("owner")
+	if owner.is_in_group("player"):
+		emit_signal("player_entered", owner, $camera)
+
+
+func _on_hitbox_area_exited(area):
+	var owner = area
+	if area.has_meta("owner"):
+		owner = area.get_meta("owner")
+	if owner.is_in_group("player"):
+		emit_signal("player_exited", owner, $camera)

scripts/cameras.gd

@@ -0,0 +1,31 @@
+extends Spatial
+
+export var target: NodePath
+onready var target_node: Spatial = get_node(target)
+export var camera_lerp := 1.0
+
+var tracking_cameras = []
+onready var prev_camera: Camera = $camera_room_center/camera
+onready var current_camera: Camera = $camera_room_center/camera setget set_current_camera
+
+func set_current_camera(new_value: Camera):
+	prev_camera = current_camera
+	current_camera = new_value
+	camera_lerp = 0.0
+	$AnimationPlayer.play("switch_camera")
+
+func _on_camera_room_player_entered(player, camera):
+	assert(tracking_cameras.find(camera) == -1)
+	tracking_cameras.append(camera)
+	if tracking_cameras.size() == 1:
+		self.current_camera = tracking_cameras.back()
+
+func _on_camera_room_player_exited(player, camera):
+	tracking_cameras.erase(camera)
+	assert(tracking_cameras.find(camera) == -1)
+	if tracking_cameras.size() == 1:
+		self.current_camera = tracking_cameras.back()
+
+func _physics_process(delta):
+	$main_camera.global_transform.basis = Basis(prev_camera.global_transform.basis.get_rotation_quat().slerp(current_camera.global_transform.basis.get_rotation_quat(), camera_lerp))
+	$main_camera.global_transform.origin = lerp(prev_camera.global_transform.origin, current_camera.global_transform.origin, camera_lerp)

scripts/tracking_camera.gd

@@ -1,7 +1,7 @@
-extends Camera
+extends Spatial
 
 export var target: NodePath
 onready var target_node: Spatial = get_node(target)
 
-func _process(delta):
+func _physics_process(delta):
 	global_transform = global_transform.looking_at(target_node.global_transform.origin, Vector3.UP)