create weather controller and daynight controller

core/daynight/environment_manager.gd

@@ -0,0 +1,64 @@
+@tool
+class_name EnvironmentManagerRoot
+extends Node3D
+
+@export var environment_config: EnvironmentConfig
+
+@export_group("Particles")
+@export var particles_wind: GPUParticles3D
+@export var particles_snow: GPUParticles3D
+@export var particles_fireflies: GPUParticles3D
+@export var particles_rain: GPUParticles3D
+@export var godray: PackedScene
+@export var fog_overlay: ColorRect
+
+#environment nodes
+@onready var sun: DirectionalLight3D = $"../DirectionalLight3D"
+@onready var environment: WorldEnvironment = $"../WorldEnvironment"
+
+var day_night_controller: DayNightController 
+var weather_controller: WeatherController
+
+var day_tween: Tween
+var day_time: float = 0.0
+
+func _ready() -> void:	
+		
+	if day_night_controller == null:
+		day_night_controller = DayNightController.new()
+		day_night_controller.name = "DayNightController"
+		day_night_controller.time_changed.connect(select_day_time)
+		add_child(day_night_controller)
+
+	if weather_controller == null:
+		weather_controller = WeatherController.new(
+			particles_wind,
+			particles_snow,
+			particles_fireflies,
+			particles_rain,
+			godray,
+			sun,
+			environment,
+			environment_config
+		)
+		weather_controller.name = "WeatherController"
+		add_child(weather_controller)
+
+func select_day_time(normalized_time: float) -> void:
+	# Convert 0.0-1.0 normalized time to range used by atmosphere lerps
+	# morning (dawn→noon) = 1.0-2.0, afternoon/night (noon→midnight) = 2.0-3.0
+	if normalized_time < 0.5:
+		# 0.0→0.5 maps to 1.0→2.0 (morning to afternoon)
+		day_time = 1.0 + (normalized_time / 0.5)
+	else:
+		# 0.5→1.0 maps to 2.0→3.0 (afternoon to night)
+		day_time = 2.0 + ((normalized_time - 0.5) / 0.5)
+
+	if day_tween and day_tween.is_valid():
+		day_tween.kill()
+	day_tween = create_tween()
+	day_tween.set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_IN_OUT)
+	day_tween.tween_property(self, "day_time", day_time, 3.0)
+	
+	if weather_controller:
+		weather_controller.day_time = day_time