1 files changed, 35 insertions, 2 deletions
diff --git a/SoundManager.gd b/SoundManager.gd
index de8230e..b86c28d 100644
--- a/SoundManager.gd
+++ b/SoundManager.gd
@@ -1,6 +1,39 @@
 extends Node
 
 
-func play(name: String):
-	var sound = get_node(name) as AudioStreamPlayer
+var current_background: AudioStreamPlayer
+
+
+func play_sound(sound_name: String):
+	var sound = get_node(sound_name) as AudioStreamPlayer
 	sound.play()
+
+
+func play_background(sound_name: String):
+	var sound = get_node(sound_name) as AudioStreamPlayer
+	
+	if sound != current_background:
+		if current_background:
+			current_background.stop()
+		
+		current_background = sound
+		sound.play()
+	
+	# sound == current_background
+	elif not current_background.playing:
+		current_background.play()
+
+
+func fade_out(sound: AudioStreamPlayer):
+	var previous_volume = sound.volume_db
+	
+	var tween = get_tree().create_tween()
+	tween.tween_property(sound, "volume_db", -80, 1.0).set_ease(Tween.EASE_OUT)
+	
+	# reset volume
+	tween.finished.connect(func():
+		sound.stop()
+		sound.volume_db = previous_volume
+	)
+	
+	return tween