Clarified purpose of _set_weather.

audio/AudioFader.gd

@@ -0,0 +1,75 @@
+class_name AudioFader extends Node
+## Controls an AudioStreamPlayer and allows for fading and crossfading.
+
+## Audio fade-out target.
+const AUDIO_FADE_MIN_VOLUME: float = -20.0
+## Default audio transition time.
+const DEFAULT_AUDIO_FADE: float = 1.0
+
+## Audio bus.
+@export var bus: StringName
+
+## Current AudioStreamPlayer.
+var player: AudioStreamPlayer = null
+## Current TweenChannel.
+var tween_channel: TweenChannel = null
+
+## Creates an initial AudioStreamPlayer child and TweenChannel.
+func _ready() -> void:
+	_create_members()
+
+## Creates an AudioStreamPlayer child and TweenChannel.
+func _create_members() -> void:
+	player = AudioStreamPlayer.new()
+	add_child(player)
+	tween_channel = TweenChannel.make_replacing()
+
+## Fades in the current audio player.
+func fade_in(stream: AudioStream, fade: float = DEFAULT_AUDIO_FADE) -> void:
+	await fade_out()
+	player.stream = stream
+	if player.stream:
+		player.volume_db = AUDIO_FADE_MIN_VOLUME
+		player.play()
+		var tween := await tween_channel.create_tween(player)
+		tween.tween_property(player, ^'volume_db', 0.0, fade)
+		await tween_channel.sync(tween)
+
+## Fades out an arbitrary audio player on an arbitrary tween channel.
+static func _fade_out_foreign(
+	p_player: AudioStreamPlayer,
+	p_tween_channel: TweenChannel,
+	fade: float = DEFAULT_AUDIO_FADE
+) -> void:
+	if p_player.playing and p_player.volume_db > AUDIO_FADE_MIN_VOLUME:
+		var tween := await p_tween_channel.create_tween(p_player)
+		tween.tween_property(
+			p_player, ^'volume_db', AUDIO_FADE_MIN_VOLUME, fade
+		)
+		await p_tween_channel.sync(tween)
+	p_player.stop()
+
+## Fades out the current audio player.
+func fade_out(fade: float = DEFAULT_AUDIO_FADE) -> void:
+	await AudioFader._fade_out_foreign(player, tween_channel, fade)
+
+## Plays audio without fading in.
+func play(stream: AudioStream) -> void:
+	await player.fade_out()
+	player.stream = stream
+	if player.stream:
+		player.volume_db = 0.0
+		player.play()
+
+## Fades out old audio and fades in new audio at the same time.
+func crossfade(stream: AudioStream, fade: float = DEFAULT_AUDIO_FADE) -> void:
+	var old_player := player
+	var old_tween_channel := tween_channel
+	var thunk := func() -> void:
+		await AudioFader._fade_out_foreign(old_player, old_tween_channel, fade)
+		old_player.queue_free()
+	_create_members()
+	await Wait.until(player.is_node_ready)
+	var task := Task.new(thunk)
+	await fade_in(stream, fade)
+	await task.sync()

audio/ambience/AmbienceInterpolator.gd

@@ -0,0 +1,126 @@
+class_name AmbienceInterpolator extends Node
+## Interpolates between multiple ambience streams.
+
+## Audio fade-out target.
+const AUDIO_FADE_MIN_VOLUME: float = -20.0
+## Default audio transition time.
+const DEFAULT_AUDIO_FADE: float = 1.0
+
+## Audio bus.
+@export var bus: StringName
+## Array of ambience streams to interpolate between.
+##
+## If an element is a sub-array, its elements in turn play simultaneously.
+@export var streams: Array = []
+
+## Tween channel for interpolation index.
+@onready var _tween_channel := TweenChannel.make_replacing()
+
+## Array of audio players, one for each ambience stream.
+var _players: Array = []
+## Current interpolation index.
+##
+## This value times streams.size() will be offset by +1
+## from the value whose ceil and ceil-1
+## will actually be used to index the arrays.
+## For example, if _ii == 2.5/streams.size(),
+## then array indices 1 and 2 will be used,
+## not array indices 2 and 3.
+## If _ii < 1.0/streams.size(),
+## it interpolates between silence and array index 0.
+var _ii: float = 0.0
+
+## Creates an audio player for each audio stream.
+func _ready() -> void:
+	for elem in streams:
+		if elem is Array:
+			var mapping: Array = []
+			_players.push_back(mapping)
+			for stream in elem:
+				assert(stream is AudioStream)
+				var player := AudioStreamPlayer.new()
+				add_child(player)
+				mapping.push_back(player)
+				player.bus = bus
+				player.stream = stream
+		else:
+			assert(elem is AudioStream)
+			var player := AudioStreamPlayer.new()
+			add_child(player)
+			_players.push_back(player)
+			player.bus = bus
+			player.stream = elem
+
+## Getter for interpolation index.
+func get_interpolation_index() -> float:
+	return _ii
+
+## Sets interpolation index and adjusts audio player levels accordingly.
+func set_interpolation_index(ii: float) -> void:
+	# Calculate interpolation factor and array indices.
+	var scaled: float = ii*_players.size()
+	var interp_fact: float = scaled - floorf(scaled)
+	var i_hi: int = ceili(scaled) - 1
+	if i_hi >= _players.size():
+		i_hi = _players.size() - 1
+	var i_lo: int = i_hi - 1
+	# Get audio players from array.
+	var p_hi: Variant = null
+	var p_lo: Variant = null
+	if i_hi >= 0:
+		p_hi = _players[i_hi]
+		if i_lo >= 0:
+			p_lo = _players[i_lo]
+	# Calculate volumes to set.
+	var v_lo: float = lerpf(0.0, AUDIO_FADE_MIN_VOLUME, interp_fact)
+	var v_hi: float = lerpf(AUDIO_FADE_MIN_VOLUME, 0.0, interp_fact)
+	# Set audio player volumes and start audio players.
+	if p_lo is Array:
+		for player in p_lo:
+			assert(player is AudioStreamPlayer)
+			player.volume_db = v_lo
+			if not player.playing:
+				player.play()
+	elif p_lo != null:
+		assert(p_lo is AudioStreamPlayer)
+		p_lo.volume_db = v_lo
+		if not p_lo.playing:
+			p_lo.play()
+	if p_hi is Array:
+		for player in p_hi:
+			assert(player is AudioStreamPlayer)
+			player.volume_db = v_hi
+			if not player.playing:
+				player.play()
+	elif p_hi != null:
+		assert(p_hi is AudioStreamPlayer)
+		p_hi.volume_db = v_hi
+		if not p_hi.playing:
+			p_hi.play()
+	# Stop every audio player we have that isn't one of the two requested.
+	for elem in _players:
+		if elem is Array:
+			for player in elem:
+				assert(player is AudioStreamPlayer)
+				if player != p_lo and player != p_hi:
+					player.volume_db = AUDIO_FADE_MIN_VOLUME
+					if player.playing:
+						player.stop()
+		else:
+			assert(elem is AudioStreamPlayer)
+			if elem != p_lo and elem != p_hi:
+				elem.volume_db = AUDIO_FADE_MIN_VOLUME
+				if elem.playing:
+					elem.stop()
+	# Update stored value of interpolation index.
+	_ii = ii
+
+## Tweens the interpolation index to the given target over time.
+func interpolate(target: float, fade: float = DEFAULT_AUDIO_FADE) -> void:
+	var tween := await _tween_channel.create_tween(self)
+	tween.tween_method(
+		set_interpolation_index,
+		get_interpolation_index(),
+		target, fade
+	)
+	await _tween_channel.sync(tween)

fx/FX.gd

@@ -0,0 +1,441 @@
+extends CanvasLayer
+## Exposes high-level controls for overarching visual and audio effects.
+
+## Default weather intensity transition time.
+const DEFAULT_WEATHER_FADE: float = 10.0
+## Default screen fade transition time.
+const DEFAULT_FADE: float = 1.0
+## Default tint transition time.
+const DEFAULT_TINT: float = 1.0
+## Default flash duration.
+const DEFAULT_FLASH: float = 1.0
+## Max turbulence influence at peak snow magnitude.
+const SNOW_MAX_MAX_TURBULENCE_INFLUENCE: float = 0.375
+## Max turbulence influence at zero snow magnitude.
+const SNOW_MIN_MAX_TURBULENCE_INFLUENCE: float = 0.125
+## Minimum necessary rain magnitude for lightning.
+const LIGHTNING_RAIN_THRESHOLD: float = 0.8
+## Probability of a lightning strike at any given frame at peak rain magnitude.
+const LIGHTNING_MAX_PROBABILITY_PER_FRAME: float = 0.005
+## Maximum duration of random lighning.
+const LIGHTNING_MAX_FADE: float = 1.0
+
+## Active configuration.
+@export var config: FXConfig
+
+## Audio fader for playing music.
+@onready var bgm_fader := $BGM as AudioFader
+## Audio fader for playing general-purpose continuous ambience.
+@onready var bgs_fader := $BGS as AudioFader
+## Ambience interpolator for playing continuous ambience related to rain.
+@onready var rain_bgs_interpolator := $RainBGS as AmbienceInterpolator
+## Ambience interpolator for playing continuous ambience related to snow.
+@onready var snow_bgs_interpolator := $SnowBGS as AmbienceInterpolator
+## Having a single universal environment allows high-level manipulation.
+@onready var environment := $WorldEnvironment.environment as Environment
+## Tween channel for changing fog color.
+@onready var fog_color_tween_channel := TweenChannel.make_replacing()
+## Tween channel for changing fog density.
+@onready var fog_density_tween_channel := TweenChannel.make_replacing()
+## Tween channel for changing fog sky affect.
+@onready var fog_sky_affect_tween_channel := TweenChannel.make_replacing()
+## Sky resource for use with environment.
+@onready var sky := $WorldEnvironment.environment.sky as Sky
+## Tween channels for shader globals.
+@onready var shader_global_tween_channels := {}
+## Having a single universal light source allows high-level manipulation.
+@onready var light := $DirectionalLight3D as DirectionalLight3D
+## Tween channel for moving light source.
+@onready var light_transform_tween_channel := TweenChannel.make_replacing()
+## Tween channel for changing light source energy.
+@onready var light_energy_tween_channel := TweenChannel.make_replacing()
+## Particle system for rendering rain.
+@onready var rain_particles := $RainParticles as WeatherParticles
+## Tween channel for changing rain particle amount ratio.
+@onready var rain_amount_tween_channel := TweenChannel.make_replacing()
+## Particle system for rendering snow.
+@onready var snow_particles := $SnowParticles as WeatherParticles
+## Tween channel for changing snow particle amount ratio.
+@onready var snow_amount_tween_channel := TweenChannel.make_replacing()
+## Tween channel for changing snow turbulence.
+@onready var snow_turbulence_tween_channel := TweenChannel.make_replacing()
+## Multiplicative solid-color overlay primarily for ambient effects.
+@onready var tint_rect := $Tint as ColorRect
+## Tween channel for changing tint color.
+@onready var tint_tween_channel := TweenChannel.make_replacing()
+## Alpha-blended solid-color overlay primarily for screen transitions.
+@onready var fade_rect := $Fade as ColorRect
+## Tween channel for changing fade color.
+@onready var fade_tween_channel := TweenChannel.make_replacing()
+## Alpha-blended solid-color overlay primarily for dramatic effect.
+@onready var flash_rect := $Flash as ColorRect
+## Tween channel for changing flash color.
+@onready var flash_tween_channel := TweenChannel.make_replacing()
+
+## Sets the environment to use canvas layer 1 (and below) as the background.
+func enable_canvas_background() -> void:
+	environment.background_mode = Environment.BG_CANVAS
+	environment.background_canvas_max_layer = 1
+
+## Sets the environment to use the sky as the background.
+func disable_canvas_background() -> void:
+	environment.background_mode = Environment.BG_SKY
+	environment.sky = sky
+
+## Applies the background mode associated with the active config.
+func restore_background_mode() -> void:
+	if config.canvas:
+		enable_canvas_background()
+	else:
+		disable_canvas_background()
+
+## Fades out any current music and plays the given music instead.
+func play_bgm(stream: AudioStream, fade: float = 0.0) -> void:
+	if fade > 0.0:
+		await bgm_fader.fade_in(stream, fade)
+	else:
+		await bgm_fader.play(stream)
+
+## Fades out any current music.
+func stop_bgm(fade: float = AudioFader.DEFAULT_AUDIO_FADE) -> void:
+	await bgm_fader.fade_out(fade)
+
+## Plays the music specified by the active config.
+func restore_bgm(fade: float = AudioFader.DEFAULT_AUDIO_FADE) -> void:
+	await play_bgm(config.bgm, fade)
+
+## Fades out any current general-purpose ambience and plays the given instead.
+func play_bgs(
+	stream: AudioStream,
+	fade: float = AudioFader.DEFAULT_AUDIO_FADE
+) -> void:
+	await bgs_fader.crossfade(stream, fade)
+
+## Fades out any current general-purpose ambience.
+func stop_bgs(fade: float = AudioFader.DEFAULT_AUDIO_FADE) -> void:
+	await bgs_fader.fade_out(fade)
+
+## Plays the ambience specified by the active config.
+func restore_bgs(fade: float = AudioFader.DEFAULT_AUDIO_FADE) -> void:
+	await play_bgs(config.bgs, fade)
+
+## Sets fog color. Alpha is used for density and sky affect.
+func set_fog(color: Color, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	var opaque := color
+	opaque.a = 1.0
+	var set_fog_color := func() -> void:
+		var tween := await fog_color_tween_channel.create_tween(self)
+		tween.tween_property(environment, ^'fog_light_color', opaque, fade)
+		await fog_color_tween_channel.sync(tween)
+	var set_fog_density := func() -> void:
+		var tween := await fog_density_tween_channel.create_tween(self)
+		tween.tween_property(environment, ^'fog_density', color.a, fade)
+		await fog_density_tween_channel.sync(tween)
+	var set_fog_sky_affect := func() -> void:
+		var tween := (
+			await fog_sky_affect_tween_channel.create_tween(self)
+		)
+		tween.tween_property(environment, ^'fog_sky_affect', color.a, fade)
+		await fog_sky_affect_tween_channel.sync(tween)
+	await Task.group([
+		Task.new(set_fog_color),
+		Task.new(set_fog_density),
+		Task.new(set_fog_sky_affect)
+	]).sync()
+
+## Sets fog density and sky affect without changing color.
+func set_fog_strength(
+	strength: float,
+	fade: float = DEFAULT_WEATHER_FADE
+) -> void:
+	var set_fog_density := func() -> void:
+		var tween := await fog_density_tween_channel.create_tween(self)
+		tween.tween_property(environment, ^'fog_density', strength, fade)
+		await fog_density_tween_channel.sync(tween)
+	var set_fog_sky_affect := func() -> void:
+		var tween := (
+			await fog_sky_affect_tween_channel.create_tween(self)
+		)
+		tween.tween_property(environment, ^'fog_sky_affect', strength, fade)
+		await fog_sky_affect_tween_channel.sync(tween)
+	await Task.group([
+		Task.new(set_fog_density),
+		Task.new(set_fog_sky_affect)
+	]).sync()
+
+## Applies the fog settings specified by the active config.
+func restore_fog(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_fog(config.fog, fade)
+
+## Sets global shader uniform.
+func set_shader_global(
+	what: StringName,
+	value: float,
+	fade: float = DEFAULT_WEATHER_FADE
+) -> void:
+	if not shader_global_tween_channels.has(what):
+		shader_global_tween_channels[what] = TweenChannel.make_replacing()
+	var tween_channel := shader_global_tween_channels[what] as TweenChannel
+	var tween := await tween_channel.create_tween(self)
+	tween.tween_method(
+		RenderingServer.global_shader_parameter_set.bind(what),
+		RenderingServer.global_shader_parameter_get(what),
+		value, fade
+	)
+	await tween_channel.sync(tween)
+
+## Sets closeness to midnight.
+func set_night(value: float, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_shader_global(&'night', value, fade)
+
+## Applies the night value specified by the active config.
+func restore_night(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_night(config.night, fade)
+
+## Sets sky cloudiness.
+func set_overcast(value: float, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_shader_global(&'overcast', value, fade)
+
+## Applies the overcast value specified by the active config.
+func restore_overcast(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_overcast(config.overcast, fade)
+
+## Sets environment wetness.
+func set_wet(value: float, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_shader_global(&'wet', value, fade)
+
+## Applies the wet value specified by the active config.
+func restore_wet(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_wet(config.wet, fade)
+
+## Sets wind speed.
+func set_wind(value: float, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_shader_global(&'wind', value, fade)
+
+## Applies the wind value specified by the active config.
+func restore_wind(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_wind(config.wind, fade)
+
+## Sets light source's position (i.e. the opposite of its facing direction).
+func set_light_source(
+	value: Vector3,
+	fade: float = DEFAULT_WEATHER_FADE
+) -> void:
+	var from := light.basis
+	var to := Basis.looking_at(-value)
+	var setter := func(weight: float) -> void:
+		light.basis = from.slerp(to, weight)
+	var tween := await light_transform_tween_channel.create_tween(self)
+	tween.tween_method(setter, 0.0, 1.0, fade)
+	await light_transform_tween_channel.sync(tween)
+
+## Applies the light source position specified by the active config.
+func restore_light_source(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_light_source(config.light_source, fade)
+
+## Sets light source's energy.
+func set_light_energy(
+	value: float,
+	fade: float = DEFAULT_WEATHER_FADE
+) -> void:
+	var tween := await light_energy_tween_channel.create_tween(self)
+	tween.tween_property(light, ^'light_energy', value, fade)
+	await light_energy_tween_channel.sync(tween)
+
+## Applies the light source energy specified by the active config.
+func restore_light_energy(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await set_light_energy(config.light_energy, fade)
+
+## Sets the weather to rainfall at the given magnitude.
+func set_rain(value: float, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await _set_weather(value, 0.0, fade)
+
+## Sets the weather to snowfall at the given magnitude.
+func set_snow(value: float, fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await _set_weather(0.0, value, fade)
+
+## Clears any active weather.
+func stop_weather(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	await _set_weather(0.0, 0.0, fade)
+
+## Applies the weather specified by the active config.
+func restore_weather(fade: float = DEFAULT_WEATHER_FADE) -> void:
+	match config.weather_type:
+		FXConfig.WeatherType.NONE:
+			await stop_weather(fade)
+		FXConfig.WeatherType.RAIN:
+			await set_rain(config.weather_magnitude, fade)
+		FXConfig.WeatherType.SNOW:
+			await set_snow(config.weather_magnitude, fade)
+
+## Sets screen tint.
+func tint(color: Color, fade: float = DEFAULT_TINT) -> void:
+	var tween := await tint_tween_channel.create_tween(self)
+	tween.tween_property(tint_rect, ^'color', color, fade)
+	await tint_tween_channel.sync(tween)
+
+## Clears screen tint.
+func clear_tint(fade: float = DEFAULT_TINT) -> void:
+	await tint(Color.WHITE, fade)
+
+## Applies the screen tint specified by the active config.
+func restore_tint(fade: float = DEFAULT_TINT) -> void:
+	await tint(config.tint, fade)
+
+## Fades the screen out to the given color.
+func fade_out(color: Color = Color.BLACK, fade: float = DEFAULT_FADE) -> void:
+	var tween := await fade_tween_channel.create_tween(self)
+	tween.tween_property(fade_rect, ^'color', color, fade)
+	await fade_tween_channel.sync(tween)
+
+## Fades the screen in from any current screen fade state.
+func fade_in(fade: float = DEFAULT_FADE) -> void:
+	var transparent_equiv := fade_rect.color
+	transparent_equiv.a = 0.0
+	await fade_out(transparent_equiv, fade)
+
+## Flashes the screen the given color.
+func flash(color: Color, fade: float = DEFAULT_FLASH) -> void:
+	var transparent_equiv := color
+	transparent_equiv.a = 0.0
+	var tween := await flash_tween_channel.create_tween(self)
+	flash_rect.color = color
+	tween.tween_property(flash_rect, ^'color', transparent_equiv, fade)
+	await flash_tween_channel.sync(tween)
+
+## Simulates lightning by rapidly shifting fog, brightness, and time of day.
+func lightning(value: float = 1.0, fade: float = DEFAULT_FLASH) -> void:
+	var night_task := func() -> void:
+		RenderingServer.global_shader_parameter_set(
+			&'night', lerpf(config.night, 0.0, value)
+		)
+		await restore_night(fade)
+	var fog_task := func() -> void:
+		environment.fog_density = lerpf(config.fog.a, 0.0, value)
+		environment.fog_sky_affect = environment.fog_density
+		await set_fog_strength(config.fog.a, fade)
+	var light_task := func() -> void:
+		light.light_energy = lerpf(config.light_energy, 1.0, value)
+		await set_light_energy(config.light_energy, fade)
+	await Task.group([
+		Task.new(night_task),
+		Task.new(fog_task),
+		Task.new(light_task)
+	]).sync()
+
+## Applies given as active config. Restores all associated effects.
+##
+## If config to apply is null or not given, restores all effects
+## associated with the current active config.
+func apply_conifg(
+	new_config: FXConfig = null,
+	fade: float = DEFAULT_WEATHER_FADE
+) -> void:
+	if new_config:
+		config = new_config
+	restore_background_mode()
+	var bgm_task := func() -> void:
+		await restore_bgm(fade)
+	var bgs_task := func() -> void:
+		await restore_bgs(fade)
+	var fog_task := func() -> void:
+		await restore_fog(fade)
+	var night_task := func() -> void:
+		await restore_night(fade)
+	var overcast_task := func() -> void:
+		await restore_overcast(fade)
+	var wet_task := func() -> void:
+		await restore_wet(fade)
+	var wind_task := func() -> void:
+		await restore_wind(fade)
+	var light_source_task := func() -> void:
+		await restore_light_source(fade)
+	var light_energy_task := func() -> void:
+		await restore_light_energy(fade)
+	var weather_task := func() -> void:
+		await restore_weather(fade)
+	var tint_task := func() -> void:
+		await restore_tint(fade)
+	await Task.group([
+		Task.new(bgm_task),
+		Task.new(bgs_task),
+		Task.new(fog_task),
+		Task.new(night_task),
+		Task.new(overcast_task),
+		Task.new(wet_task),
+		Task.new(wind_task),
+		Task.new(light_source_task),
+		Task.new(light_energy_task),
+		Task.new(weather_task),
+		Task.new(tint_task)
+	]).sync()
+
+## Changes the weather to an arbitrary and possibly chimeric configuration.
+##
+## Backend to public weather methods.
+func _set_weather(
+	rain: float,
+	snow: float,
+	fade: float = DEFAULT_WEATHER_FADE
+) -> void:
+	var rain_audio_task := func() -> void:
+		await rain_bgs_interpolator.interpolate(rain, fade)
+	var rain_amount_task := func() -> void:
+		var tween := await rain_amount_tween_channel.create_tween(self)
+		tween.tween_property(rain_particles, ^'amount_ratio', rain, fade)
+		await rain_amount_tween_channel.sync(tween)
+	var snow_audio_task := func() -> void:
+		await snow_bgs_interpolator.interpolate(snow, fade)
+	var snow_amount_task := func() -> void:
+		var tween := await snow_amount_tween_channel.create_tween(self)
+		tween.tween_property(snow_particles, ^'amount_ratio', snow, fade)
+		await snow_amount_tween_channel.sync(tween)
+	var max_turbulence: float = lerpf(
+		SNOW_MIN_MAX_TURBULENCE_INFLUENCE,
+		SNOW_MAX_MAX_TURBULENCE_INFLUENCE,
+		snow
+	)
+	var min_turbulence: float = max_turbulence/2.0
+	var snow_max_turbulence_task := func() -> void:
+		var tween := await snow_turbulence_tween_channel.create_tween(self)
+		tween.tween_property(
+			snow_particles.process_material,
+			^'turbulence_influence_max',
+			max_turbulence,
+			fade
+		)
+		await snow_turbulence_tween_channel.sync(tween)
+	var snow_min_turbulence_task := func() -> void:
+		var tween := await snow_turbulence_tween_channel.create_tween(self)
+		tween.tween_property(
+			snow_particles.process_material,
+			^'turbulence_influence_min',
+			min_turbulence,
+			fade
+		)
+		await snow_turbulence_tween_channel.sync(tween)
+	await Task.group([
+		Task.new(rain_audio_task),
+		Task.new(rain_amount_task),
+		Task.new(snow_audio_task),
+		Task.new(snow_amount_task),
+		Task.new(snow_max_turbulence_task),
+		Task.new(snow_min_turbulence_task)
+	]).sync()
+
+## Lightning handling for _process.
+func _do_lightning() -> void:
+	if rain_particles.amount_ratio > LIGHTNING_RAIN_THRESHOLD:
+		var roll: float = randf()
+		var max_power: float = (
+			(rain_particles.amount_ratio - LIGHTNING_RAIN_THRESHOLD)/
+			(1.0 - LIGHTNING_RAIN_THRESHOLD)
+		)
+		var check: float = max_power*LIGHTNING_MAX_PROBABILITY_PER_FRAME
+		if roll <= check:
+			var power: float = max_power*roll/check
+			# Intentionally not awaited.
+			lightning(power, power*LIGHTNING_MAX_FADE)
+
+func _process(_delta: float) -> void:
+	_do_lightning()

fx/FX.tscn

@@ -0,0 +1,167 @@
+[gd_scene load_steps=26 format=3 uid="uid://bapbn52tw4uxt"]
+
+[ext_resource type="Script" path="res://fx/FX.gd" id="1_o5hjr"]
+[ext_resource type="Script" path="res://audio/AudioFader.gd" id="2_lpome"]
+[ext_resource type="Script" path="res://audio/ambience/AmbienceInterpolator.gd" id="3_kcje8"]
+[ext_resource type="Shader" path="res://shaders/sky.gdshader" id="3_qkds1"]
+[ext_resource type="AudioStream" uid="uid://bs25p8gni0x5t" path="res://audio/ambience/rain_level_1.ogg" id="4_m88w1"]
+[ext_resource type="ArrayMesh" uid="uid://5s6wywij7e8l" path="res://fx/Raindrop.res" id="4_n0mfc"]
+[ext_resource type="ArrayMesh" uid="uid://l6okcjkm4n72" path="res://fx/Snowflake.res" id="4_x3nfi"]
+[ext_resource type="Script" path="res://fx/WeatherParticles.gd" id="5_4a72t"]
+[ext_resource type="AudioStream" uid="uid://cvkmicogpj178" path="res://audio/ambience/rain_level_2.ogg" id="5_qq61e"]
+[ext_resource type="AudioStream" uid="uid://gmicbgcj2e2k" path="res://audio/ambience/rain_level_3.ogg" id="6_boctk"]
+[ext_resource type="AudioStream" uid="uid://dskrc0ofdbnbl" path="res://audio/ambience/rain_level_4.ogg" id="7_oixwt"]
+[ext_resource type="AudioStream" uid="uid://t2y240536hb2" path="res://audio/ambience/rain_level_5.ogg" id="8_my1rc"]
+[ext_resource type="AudioStream" uid="uid://clxqwer2sr55e" path="res://audio/ambience/thunder.ogg" id="9_fbpi5"]
+[ext_resource type="AudioStream" uid="uid://fs3rqrp3cn3b" path="res://audio/ambience/howling_wind.ogg" id="10_dbbpf"]
+
+[sub_resource type="FastNoiseLite" id="FastNoiseLite_jy0wt"]
+
+[sub_resource type="NoiseTexture2D" id="NoiseTexture2D_guaq2"]
+seamless = true
+noise = SubResource("FastNoiseLite_jy0wt")
+
+[sub_resource type="Gradient" id="Gradient_uyl8u"]
+offsets = PackedFloat32Array(0.764151, 1)
+
+[sub_resource type="FastNoiseLite" id="FastNoiseLite_reikm"]
+frequency = 0.75
+
+[sub_resource type="NoiseTexture2D" id="NoiseTexture2D_ahwt5"]
+width = 1024
+color_ramp = SubResource("Gradient_uyl8u")
+noise = SubResource("FastNoiseLite_reikm")
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_khdbh"]
+shader = ExtResource("3_qkds1")
+shader_parameter/cloud_map = SubResource("NoiseTexture2D_guaq2")
+shader_parameter/star_map = SubResource("NoiseTexture2D_ahwt5")
+
+[sub_resource type="Sky" id="Sky_y43u3"]
+sky_material = SubResource("ShaderMaterial_khdbh")
+
+[sub_resource type="Environment" id="Environment_5ktyi"]
+background_mode = 2
+background_canvas_max_layer = 1
+sky = SubResource("Sky_y43u3")
+fog_enabled = true
+fog_light_color = Color(0.517647, 0.552941, 0.607843, 1)
+fog_density = 0.0
+fog_sky_affect = 0.0
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_bqidl"]
+particle_flag_align_y = true
+emission_shape_offset = Vector3(0, 24, 0)
+emission_shape = 6
+emission_ring_axis = Vector3(0, 1, 0)
+emission_ring_height = 0.0
+emission_ring_radius = 32.0
+emission_ring_inner_radius = 16.0
+direction = Vector3(0, -1, 0)
+spread = 3.0
+initial_velocity_min = 48.0
+initial_velocity_max = 48.0
+angular_velocity_min = 360.0
+angular_velocity_max = 720.0
+damping_min = 4.0
+damping_max = 4.0
+turbulence_noise_speed = Vector3(0, 0, 1)
+turbulence_influence_min = 0.063
+turbulence_influence_max = 0.063
+collision_mode = 2
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_x0w6v"]
+particle_flag_rotate_y = true
+emission_shape_offset = Vector3(0, 24, 0)
+emission_shape = 6
+emission_ring_axis = Vector3(0, 1, 0)
+emission_ring_height = 0.0
+emission_ring_radius = 32.0
+emission_ring_inner_radius = 16.0
+direction = Vector3(0, -1, 0)
+initial_velocity_min = 3.0
+initial_velocity_max = 3.0
+angular_velocity_min = 360.0
+angular_velocity_max = 720.0
+damping_min = 4.0
+damping_max = 4.0
+turbulence_enabled = true
+turbulence_noise_speed = Vector3(0, 0, 1)
+turbulence_influence_min = 0.188
+turbulence_influence_max = 0.375
+collision_mode = 2
+
+[sub_resource type="CanvasItemMaterial" id="CanvasItemMaterial_4csoj"]
+blend_mode = 3
+
+[node name="FX" type="CanvasLayer"]
+layer = 2
+script = ExtResource("1_o5hjr")
+
+[node name="BGM" type="Node" parent="."]
+script = ExtResource("2_lpome")
+bus = &"Music"
+
+[node name="BGS" type="Node" parent="."]
+script = ExtResource("2_lpome")
+bus = &"Sound"
+
+[node name="RainBGS" type="Node" parent="."]
+script = ExtResource("3_kcje8")
+bus = &"Sound"
+streams = [ExtResource("4_m88w1"), ExtResource("5_qq61e"), ExtResource("6_boctk"), ExtResource("7_oixwt"), [ExtResource("8_my1rc"), ExtResource("9_fbpi5")]]
+
+[node name="SnowBGS" type="Node" parent="."]
+script = ExtResource("3_kcje8")
+bus = &"Sound"
+streams = [ExtResource("10_dbbpf")]
+
+[node name="WorldEnvironment" type="WorldEnvironment" parent="."]
+environment = SubResource("Environment_5ktyi")
+
+[node name="RainParticles" type="GPUParticles3D" parent="."]
+amount = 32768
+amount_ratio = 0.0
+lifetime = 0.75
+visibility_aabb = AABB(-64, -64, -64, 128, 128, 128)
+process_material = SubResource("ParticleProcessMaterial_bqidl")
+draw_pass_1 = ExtResource("4_n0mfc")
+script = ExtResource("5_4a72t")
+seconds_ahead = 1.0
+
+[node name="SnowParticles" type="GPUParticles3D" parent="."]
+amount = 4096
+amount_ratio = 0.0
+lifetime = 6.0
+visibility_aabb = AABB(-64, -64, -64, 128, 128, 128)
+process_material = SubResource("ParticleProcessMaterial_x0w6v")
+draw_pass_1 = ExtResource("4_x3nfi")
+script = ExtResource("5_4a72t")
+
+[node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
+light_energy = 0.25
+shadow_enabled = true
+
+[node name="Tint" type="ColorRect" parent="."]
+material = SubResource("CanvasItemMaterial_4csoj")
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Fade" type="ColorRect" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(1, 1, 1, 0)
+
+[node name="Flash" type="ColorRect" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(1, 1, 1, 0)

fx/FXConfig.gd

@@ -0,0 +1,36 @@
+class_name FXConfig extends Resource
+## Stores settings to apply to FX.
+
+## Variety of weather condition.
+enum WeatherType {
+	NONE, ## No particular weather condition.
+	RAIN, ## Rainfall.
+	SNOW ## Snowfall.
+}
+
+## Whether to render a canvas layer in the background instead of sky.
+@export var canvas := false
+## Music that should play.
+@export var bgm: AudioStream = null
+## Ambience that should play.
+@export var bgs: AudioStream = null
+## Desired fog color.
+@export var fog := Color.TRANSPARENT
+## How close the sky should look to midnight.
+@export var night: float = 0.0
+## How cloudy the sky should be.
+@export var overcast: float = 0.25
+## How wet the environment should be.
+@export var wet: float = 0.0
+## Desired wind speed.
+@export var wind: float = 0.25
+## Direction the light should come from. (Opposite of actual facing direction.)
+@export var light_source := Vector3.UP
+## Light intensity.
+@export var light_energy: float = 0.25
+## Weather that should occur.
+@export var weather_type := WeatherType.NONE
+## Amount of weather to occur.
+@export var weather_magnitude: float = 0.0
+## Screen tint, e.g. for exceptionally hot or cold environments.
+@export var tint := Color.WHITE

fx/Raindrop.glb.import

@@ -0,0 +1,47 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://bjodbd5e8vd5s"
+path="res://.godot/imported/Raindrop.glb-5c9e24da8779228af34394222cad9207.scn"
+
+[deps]
+
+source_file="res://fx/Raindrop.glb"
+dest_files=["res://.godot/imported/Raindrop.glb-5c9e24da8779228af34394222cad9207.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+import_script/path=""
+_subresources={
+"meshes": {
+"Raindrop_Cylinder": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://fx/Raindrop.res"
+}
+}
+}
+gltf/naming_version=1
+gltf/embedded_image_handling=1

fx/Snowflake.glb.import

@@ -0,0 +1,47 @@
+[remap]
+
+importer="scene"
+importer_version=1
+type="PackedScene"
+uid="uid://bwgf3d4bhrbmf"
+path="res://.godot/imported/Snowflake.glb-4fc7c590a9a455186ce9965fe6d9835b.scn"
+
+[deps]
+
+source_file="res://fx/Snowflake.glb"
+dest_files=["res://.godot/imported/Snowflake.glb-4fc7c590a9a455186ce9965fe6d9835b.scn"]
+
+[params]
+
+nodes/root_type=""
+nodes/root_name=""
+nodes/apply_root_scale=true
+nodes/root_scale=1.0
+meshes/ensure_tangents=true
+meshes/generate_lods=true
+meshes/create_shadow_meshes=true
+meshes/light_baking=1
+meshes/lightmap_texel_size=0.2
+meshes/force_disable_compression=false
+skins/use_named_skins=true
+animation/import=true
+animation/fps=30
+animation/trimming=false
+animation/remove_immutable_tracks=true
+import_script/path=""
+_subresources={
+"meshes": {
+"Snowflake_Circle_001": {
+"generate/lightmap_uv": 0,
+"generate/lods": 0,
+"generate/shadow_meshes": 0,
+"lods/normal_merge_angle": 60.0,
+"lods/normal_split_angle": 25.0,
+"save_to_file/enabled": true,
+"save_to_file/make_streamable": "",
+"save_to_file/path": "res://fx/Snowflake.res"
+}
+}
+}
+gltf/naming_version=1
+gltf/embedded_image_handling=1

fx/WeatherParticles.gd

@@ -0,0 +1,25 @@
+class_name WeatherParticles extends GPUParticles3D
+## Particle system that follows the camera.
+
+## How far directly in front of the camera to remain regardless of velocity.
+@export var front_flat_distance: float = 1.0
+## How many seconds ahead of the camera to remain when it moves.
+@export var seconds_ahead: float = 4.0
+
+## Last known position of the camera, for tracking velocity.
+var _last_camera_posn := Vector3.ZERO
+
+func _process(delta: float) -> void:
+	var camera := get_viewport().get_camera_3d()
+	if camera:
+		# Track camera velocity.
+		var camera_velocity := (
+			camera.global_position - _last_camera_posn
+		)/delta
+		_last_camera_posn = camera.global_position
+		# Reposition particle system.
+		global_position = (
+			camera.global_position +
+			camera.basis.z*front_flat_distance +
+			camera_velocity*seconds_ahead
+		)

project.godot

@@ -20,13 +20,146 @@ buses/default_bus_layout="res://audio/default_bus_layout.tres"
 
 [autoload]
 
-Wait="*res://autoload/Wait/Wait.gd"
+Wait="*res://util/Wait.gd"
 
 [gui]
 
 theme/custom="res://ui/Theme.tres"
 theme/custom_font="res://ui/Blockies.otf"
 
+[input]
+
+ui_accept={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194309,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194310,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":32,"physical_keycode":0,"key_label":0,"unicode":32,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":6,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+ui_select={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":0,"button_index":3,"pressure":0.0,"pressed":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":32,"physical_keycode":0,"key_label":0,"unicode":32,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":0,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+ui_cancel={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194305,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":1,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+ui_focus_next={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194306,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":10,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+ui_focus_prev={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":true,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194306,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":9,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+move_left={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":65,"key_label":0,"unicode":97,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":0,"axis_value":-1.0,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":13,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+move_right={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":68,"key_label":0,"unicode":100,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":0,"axis_value":1.0,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":14,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+move_forward={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":87,"key_label":0,"unicode":119,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":-1.0,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":11,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+move_backward={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":83,"key_label":0,"unicode":115,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":1.0,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":12,"pressure":0.0,"pressed":true,"script":null)
+]
+}
+look_left={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":2,"axis_value":-1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194319,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194442,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
+look_right={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":2,"axis_value":1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194321,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194444,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
+look_up={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":3,"axis_value":-1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194446,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
+look_down={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":3,"axis_value":1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194322,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194440,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
+jump={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":0,"pressure":0.0,"pressed":true,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":10,"pressure":0.0,"pressed":true,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":32,"key_label":0,"unicode":32,"echo":false,"script":null)
+, Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":2,"canceled":false,"pressed":false,"double_click":false,"script":null)
+]
+}
+ability={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":1,"pressure":0.0,"pressed":true,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":2,"pressure":0.0,"pressed":true,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":9,"pressure":0.0,"pressed":true,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194325,"key_label":0,"unicode":0,"echo":false,"script":null)
+, Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":1,"canceled":false,"pressed":false,"double_click":false,"script":null)
+]
+}
+interact={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":69,"key_label":0,"unicode":101,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":3,"pressure":0.0,"pressed":true,"script":null)
+, Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":3,"canceled":false,"pressed":false,"double_click":false,"script":null)
+, Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":1,"canceled":false,"pressed":false,"double_click":false,"script":null)
+]
+}
+zoom_in={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":5,"axis_value":1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":61,"key_label":0,"unicode":61,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194437,"key_label":0,"unicode":43,"echo":false,"script":null)
+, Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":4,"canceled":false,"pressed":false,"double_click":false,"script":null)
+]
+}
+zoom_out={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":4,"axis_value":1.0,"script":null)
+, Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":0,"position":Vector2(0, 0),"global_position":Vector2(0, 0),"factor":1.0,"button_index":5,"canceled":false,"pressed":false,"double_click":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":45,"key_label":0,"unicode":45,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194435,"key_label":0,"unicode":45,"echo":false,"script":null)
+]
+}
+
 [shader_globals]
 
 wet={

shaders/sky.gdshader

@@ -37,11 +37,11 @@ uniform sampler2D cloud_map:
 uniform sampler2D star_map:
 	source_color, filter_linear, repeat_enable, hint_default_black;
 /// Interpolates between brightest time of day and darkest time of night.
-global uniform float night = 0.0;
+global uniform float night;
 /// Interpolates quadratically between clear sky and cloudy sky.
-global uniform float overcast = 0.25;
+global uniform float overcast;
 /// Interpolates quadratically between no wind and maximum wind.
-global uniform float wind = 0.25;
+global uniform float wind;
 
 /// Computes cloud RGBA at given UV.
 vec4 clouds(vec2 uv) {

ui/Theme.tres

@@ -3,8 +3,8 @@
 [ext_resource type="StyleBox" uid="uid://cx6kl6ar10uy7" path="res://ui/FancyButton/DisabledN.tres" id="1_30kd2"]
 [ext_resource type="StyleBox" uid="uid://g7q4wqaqrvxd" path="res://ui/FancyButton/DisabledP.tres" id="1_m50n6"]
 [ext_resource type="StyleBox" uid="uid://d2sj5mwdcohl3" path="res://ui/FancyButton/NormalP.tres" id="1_myyjr"]
-[ext_resource type="StyleBox" path="res://ui/MenuStyleBoxWithWideMargins.tres" id="1_qgrlj"]
+[ext_resource type="StyleBox" uid="uid://cixomfcqh3o41" path="res://ui/MenuStyleBoxWithWideMargins.tres" id="1_qgrlj"]
-[ext_resource type="FontFile" uid="uid://mkhsuyj6upt3" path="res://ui/Blockies.otf" id="1_xcfwb"]
+[ext_resource type="FontFile" uid="uid://epy1i2syesvl" path="res://ui/Blockies.otf" id="1_xcfwb"]
 [ext_resource type="StyleBox" uid="uid://bw2d7tiqv134p" path="res://ui/FancyButton/FocusN.tres" id="2_h5ibl"]
 [ext_resource type="StyleBox" uid="uid://cou4wl1h8xa84" path="res://ui/FancyButton/FocusP.tres" id="2_tsibo"]
 [ext_resource type="StyleBox" uid="uid://yjek5otetrf5" path="res://ui/FancyButton/HoverP.tres" id="3_g0df2"]

util/TweenChannel.gd

@@ -70,9 +70,10 @@ func create_tween(target: Variant) -> Tween:
 ##
 ## The given tween must have been created with self.create_tween.
 func sync(what: Tween) -> void:
-	var last_terminated: Tween = null
+	if what and what.is_valid():
-	while last_terminated != what:
+		var last_terminated: Tween = null
-		last_terminated = await terminated
+		while last_terminated != what:
+			last_terminated = await terminated
 
 ## Yields until the given tween is invalid and then cleans up bookkeeping.
 ##