Godot Scene Transition

SceneManager.gd

extends Node

var next_scene = null
var is_ready setget _finish_transition

onready var anim = $Fader/AnimationPlayer

func _finish_transition(value):
	if value:
		is_ready = true
		anim.play("Fade")
		$Fader/Label.visible = false
		get_tree().paused = false
	
func transition_menu(anim_name):
	var tree = get_tree()
	tree.change_scene(next_scene)
	anim.disconnect("animation_finished", self, "transition_menu")
	if is_ready:
		self.is_ready = true
	else:
		$Fader/Label.visible = true
	next_scene = null
	
func change_scene(goto, hold=false):
	"""
	Changes scene with a transition.
	You can hold the fade back in transition if desired until
	the next scene is in a state that is considered "ready"
	"""
	next_scene = goto
	anim.play_backwards("Fade")
	anim.connect("animation_finished", self, "transition_menu")
	is_ready = not hold
	get_tree().paused = true