Steven Wroblewski
65 lines
1.9 KiB
GDScript
65 lines
1.9 KiB
GDScript
## UltrasoundMachine — displays a continuous heartbeat pulse on the screen.
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## Plays looping ambient heartbeat audio when the ultrasound room is active.
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class_name UltrasoundMachine extends Node2D
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const BEAT_RISE_DURATION: float = 0.12
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const BEAT_FALL_DURATION: float = 0.12
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const BEAT_INTERVAL: float = 0.60
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const BEAT_SCALE_PEAK: Vector2 = Vector2(1.5, 1.5)
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const BEAT_SCALE_REST: Vector2 = Vector2(1.0, 1.0)
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const _HEARTBEAT_PATH: String = "res://assets/audio/sfx/ultrasound_heartbeat.ogg"
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@export var trigger_floor: int = 2
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@export var trigger_room: int = 0
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var _audio: AudioStreamPlayer
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func _ready() -> void:
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_start_heartbeat_loop()
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_setup_audio()
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RoomNavigator.room_changed.connect(_on_room_changed)
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func _exit_tree() -> void:
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if RoomNavigator.room_changed.is_connected(_on_room_changed):
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RoomNavigator.room_changed.disconnect(_on_room_changed)
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func _setup_audio() -> void:
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_audio = AudioStreamPlayer.new()
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add_child(_audio)
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if AudioServer.get_driver_name() == "Dummy":
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return
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if not ResourceLoader.exists(_HEARTBEAT_PATH):
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return
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var base: AudioStream = load(_HEARTBEAT_PATH) as AudioStream
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if base == null:
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return
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var ogg: AudioStreamOggVorbis = base as AudioStreamOggVorbis
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if ogg == null:
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return
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ogg = ogg.duplicate() as AudioStreamOggVorbis
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ogg.loop = true
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_audio.stream = ogg
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func _on_room_changed(floor_index: int, room_index: int) -> void:
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if _audio == null or _audio.stream == null:
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return
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if floor_index == trigger_floor and room_index == trigger_room:
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_audio.play()
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else:
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_audio.stop()
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func _start_heartbeat_loop() -> void:
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var dot: Node2D = get_node_or_null("HeartbeatDot") as Node2D
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if dot == null:
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return
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var tween: Tween = create_tween()
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tween.set_loops()
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tween.tween_property(dot, "scale", BEAT_SCALE_PEAK, BEAT_RISE_DURATION)
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tween.tween_property(dot, "scale", BEAT_SCALE_REST, BEAT_FALL_DURATION)
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tween.tween_interval(BEAT_INTERVAL)
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