add flash and thunders

dynamic-sky/scripts/dynamic_sky_root.gd

@@ -465,6 +465,10 @@ func _sync_weather_vfx() -> void:
 		return
 	weather_vfx.set_rain_intensity(weather_controller.get_rain_intensity())
 	weather_vfx.set_snow_intensity(weather_controller.get_snow_intensity())
+	weather_vfx.set_lightning(
+		weather_controller.is_lightning_active(),
+		weather_controller.get_lightning_frequency()
+	)
 
 
 func _update_debug_info() -> void:

dynamic-sky/scripts/weather_vfx.gd

@@ -19,6 +19,12 @@ extends Node3D
 @export var lightning_color: Color = Color(0.9, 0.9, 1.0)
 @export var lightning_flash_duration: float = 0.15
 
+@export_group("Thunder")
+@export var thunder_enabled: bool = true
+@export var thunder_min_delay: float = 1.0
+@export var thunder_max_delay: float = 5.0
+@export var thunder_volume_db: float = -2.0
+
 var _rain_particles: GPUParticles3D
 var _snow_particles: GPUParticles3D
 var _rain_material: ShaderMaterial
@@ -33,12 +39,16 @@ var _lightning_timer: float = 0.0
 var _lightning_next: float = 0.0
 var _lightning_flash_timer: float = 0.0
 var _lightning_light: DirectionalLight3D
+var _thunder_player: AudioStreamPlayer
+var _thunder_pending: bool = false
+var _thunder_delay_timer: float = 0.0
 
 
 func _ready() -> void:
 	_create_rain_system()
 	_create_snow_system()
 	_create_lightning_light()
+	_create_thunder_player()
 
 
 func _process(delta: float) -> void:
@@ -56,6 +66,7 @@ func _process(delta: float) -> void:
 		_snow_material.set_shader_parameter("alpha_mult", _current_snow)
 	
 	_process_lightning(delta)
+	_process_thunder(delta)
 	_follow_camera()
 
 
@@ -87,6 +98,36 @@ func _trigger_lightning() -> void:
 		_lightning_light.visible = true
 		_lightning_light.rotation_degrees.x = randf_range(-80.0, -50.0)
 		_lightning_light.rotation_degrees.y = randf_range(-180.0, 180.0)
+	
+	if thunder_enabled:
+		_thunder_pending = true
+		_thunder_delay_timer = randf_range(thunder_min_delay, thunder_max_delay)
+
+
+func _process_thunder(delta: float) -> void:
+	if not _thunder_pending:
+		return
+	
+	_thunder_delay_timer -= delta
+	if _thunder_delay_timer <= 0.0:
+		_thunder_pending = false
+		_play_thunder()
+
+
+func _play_thunder() -> void:
+	if _thunder_player == null:
+		return
+	
+	_thunder_player.play()
+
+
+func _create_thunder_player() -> void:
+	_thunder_player = AudioStreamPlayer.new()
+	_thunder_player.name = "ThunderPlayer"
+	_thunder_player.volume_db = thunder_volume_db
+	_thunder_player.bus = "Master"
+	_thunder_player.stream = load("res://resources/thunder.mp3")
+	add_child(_thunder_player)
 
 
 func _create_lightning_light() -> void: