Separate TransitionManager from Top

1 files changed, 55 insertions, 0 deletions

diff --git a/transition_manager.gd b/transition_manager.gd
new file mode 100644
index 0000000..d9a4a09
--- /dev/null
+++ b/transition_manager.gd
@@ -0,0 +1,55 @@
+class_name TransitionManager
+extends CanvasLayer
+
+@onready var top: Top = get_tree().root.get_node("Top")
+
+var _transition_room: Node
+var _transition_door_name: Variant # String or null
+
+func room_transition(from_door: Door, to_room_path: String, door_name: Variant):
+	# Do not transition if there is already a transition in process
+	if _transition_room != null:
+		#print_debug("Tried to transition to ", room_name, " but a transition was already in process")
+		return
+
+	if from_door:
+		var player: Player = top.get_node("ActiveRoom").find_child("Player")
+		player.set_forced_input(from_door.enter_towards)
+
+	# Start animation
+	# The animation calls _change_room at a specific time
+	$AnimationPlayer.play("room_trans_start")
+
+	var room = ResourceLoader.load(to_room_path)
+	_transition_room = room.instantiate()
+	_transition_door_name = door_name
+
+func _transition_start():
+	#print_debug("_transition_start")
+	
+	# If the room hasn't loaded yet, loop until it is
+	while _transition_room == null:
+		await get_tree().create_timer(0.1).timeout
+
+	top.replace_active_room(_transition_room, _on_room_changed)
+	
+func _on_room_changed():
+	#print_debug("_on_room_changed")
+	var room = top.get_node("ActiveRoom")
+	var player: Player = room.find_child("Player")
+	if _transition_door_name:
+		var door: Door = room.find_child(_transition_door_name)
+		player.position = door.position
+		player.set_forced_input(door.exit_towards)
+
+	$AnimationPlayer.play("room_trans_end")
+	
+func _transition_end():
+	#print_debug("_transition_end")
+	_transition_room = null
+	_transition_door_name = null
+	
+	var room = top.get_node("ActiveRoom")
+	var player: Player = room.find_child("Player")
+	if player:
+		player.set_forced_input(null)