Replace weather types with stackable effects

README.md

@@ -3,6 +3,6 @@
 - Thunder sound and puddle texture DWYWPL by Don, Nathan from mymonths at https://github.com/minetest-mods/mymonths
 - Snow cover texture WTFPL, taken from mymonths
 - Rain texture CC-BY-SA 3.0 from TeddyDesTodes, taken from his weather branch at https://github.com/TeddyDesTodes/minetest/tree/weather
-- Snow flake textures CC BY-SA (3.0) by paramat, found in snowdrift mod at https://github.com/paramat/snowdrift
+- Snow flake and rain drop textures CC BY-SA (3.0) by paramat, found in snowdrift mod at https://github.com/paramat/snowdrift
 - Snow texture composited from individual snow flakes by paramat. CC-BY-SA (3.0)
 - Wind sound CC-BY (3.0) by InspectorJ from https://freesound.org/people/InspectorJ/sounds/376415/

init.lua

@@ -34,21 +34,23 @@ weather_mod.settings = {
 }
 
 weather_mod.state = {
-	current_weather = weather_mod.modname .. ":snowstorm",
 	heat = 1,
-	humidity = 1
+	humidity = 1,
+	wind = vector.new(0, 0, -0.25)
 }
 
 -- import core API
 dofile(weather_mod.modpath.."/lib/player.lua")
 dofile(weather_mod.modpath.."/lib/environment.lua")
+dofile(weather_mod.modpath.."/lib/wind.lua")
 dofile(weather_mod.modpath.."/lib/lightning.lua")
 dofile(weather_mod.modpath.."/lib/main.lua")
+dofile(weather_mod.modpath.."/lib/commands.lua")
 
 -- import individual weather types
-dofile(weather_mod.modpath.."/weathers/clear.lua")
 dofile(weather_mod.modpath.."/weathers/rain.lua")
-dofile(weather_mod.modpath.."/weathers/rainstorm.lua")
+dofile(weather_mod.modpath.."/weathers/rain_heavy.lua")
 dofile(weather_mod.modpath.."/weathers/snow.lua")
-dofile(weather_mod.modpath.."/weathers/snowstorm.lua")
+dofile(weather_mod.modpath.."/weathers/snow_heavy.lua")
+dofile(weather_mod.modpath.."/weathers/storm.lua")
 dofile(weather_mod.modpath.."/weathers/sandstorm.lua")

lib/commands.lua

@@ -0,0 +1,87 @@
+minetest.register_privilege("weather", {
+	description = "Change the weather",
+	give_to_singleplayer = false
+})
+
+-- Force a weather effect to override environment
+minetest.register_chatcommand("set_weather", {
+	params = "<weather>",
+	description = "Set weather to a registered type of effect\
+		show all types when no parameters are given", -- full description
+	privs = {weather = true},
+	func = function(name, param)
+		if param == nil or param == "" or param == "?" then
+			local types="auto"
+			for i,_ in pairs(weather_mod.weathers) do
+				types=types..", "..i
+			end
+			minetest.chat_send_player(name, "avalible weather types: "..types)
+		else
+			if type(weather_mod.weathers[param]) == "nil" and param ~= "auto" then
+				minetest.chat_send_player(name, "This type of weather is not registered.\n"..
+					"To list all types of weather run the command without parameters.")
+			else
+				weather_mod.state.current_weather = param
+			end
+		end
+	end
+})
+
+-- Set wind speed and direction
+minetest.register_chatcommand("set_wind", {
+	params = "<weather>",
+	description = "Set wind to the given x,z direction", -- full description
+	privs = {weather = true},
+	func = function(name, param)
+		if param==nil or param=="" then
+			minetest.chat_send_player(name, "please provide two comma seperated numbers")
+			return
+		end
+		local x,z = string.match(param, "^([%d.-]+)[, ] *([%d.-]+)$")
+		x=tonumber(x)
+		z=tonumber(z)
+		if x and z then
+			weather_mod.state.wind = vector.new(x,0,z)
+		else
+			minetest.chat_send_player(name, param.." are not two comma seperated numbers")
+		end
+	end
+})
+
+-- Set base value of global heat level
+minetest.register_chatcommand("set_heat", {
+	params = "<weather>",
+	description = "Set base value of global heat level", -- full description
+	privs = {weather = true},
+	func = function(name, param)
+		if param==nil or param=="" then
+			minetest.chat_send_player(name, "please provide a heat value")
+			return
+		end
+		v = tonumber(param)
+		if v then
+			weather_mod.state.heat = v
+		else
+			minetest.chat_send_player(name, param.." is not a valid heat level")
+		end
+	end
+})
+
+-- Set base value of global humidity level
+minetest.register_chatcommand("set_humidity", {
+	params = "<weather>",
+	description = "Set base value of global humidity level", -- full description
+	privs = {weather = true},
+	func = function(name, param)
+		if param==nil or param=="" then
+			minetest.chat_send_player(name, "please provide a humidity value")
+			return
+		end
+		v = tonumber(param)
+		if v then
+			weather_mod.state.humidity = v
+		else
+			minetest.chat_send_player(name, param.." is not a valid humidity level")
+		end
+	end
+})

lib/environment.lua

@@ -13,50 +13,47 @@ function weather_mod.get_humidity(pos)
 	return (base + biome) * random
 end
 
+function weather_mod.get_climate(pos)
+	local climate = {pos = pos}
+	climate.heat = weather_mod.get_heat(pos)
+	climate.humidity = weather_mod.get_humidity(pos)
+	climate.windspeed = vector.length(weather_mod.state.wind)
+	return climate
+end
+
 local function is_acceptable_weather_param(value, attr, config)
-	local min = config.conditions["min_" .. attr] or -10000
+	local min = config.conditions["min_" .. attr] or -math.huge
 	local max = config.conditions["max_" .. attr] or  math.huge
-	minetest.log(attr .. ": " .. value .. " <=> " .. min .. "," .. max)
 	return value > min and value <= max
 end
 
-function weather_mod.get_weather(pos, wind)
+function weather_mod.get_effects(climate)
+	local forced_weather = weather_mod.state.current_weather
+	if type(forced_weather) ~= nil and forced_weather ~= "auto" then
+		return { forced_weather }
+	end
 	local params = {}
-	params.heat = weather_mod.get_heat(pos)
-	params.humidity = weather_mod.get_humidity(pos)
-	params.windspeed = vector.length(wind)
-	minetest.log(params.heat .. ", " .. params.humidity .. ", " .. params.windspeed)
+	params.heat = climate.heat
+	params.humidity = climate.humidity
+	params.windspeed = vector.length(weather_mod.state.wind)
+	params.height = climate.pos.y
 
-	local weather
-	local priority = -1
-	local attributes = { "heat", "humidity", "windspeed" }
-	for name, config in pairs(weather_mod.weathers) do
-		minetest.log(dump2(priority, "p"))
-		if type(priority) ~= "nil" and config.priority < priority then
-			minetest.log("skipped " .. name)
+	local effects = {}
+	local attributes = { "heat", "humidity", "windspeed", "height" }
+	for name, effect in pairs(weather_mod.weathers) do
+		if type(effect.config.conditions) == "nil" then
+			table.insert(effects, name)
+			goto continue
+		end
 
-		elseif type(config.conditions) == "nil" then
-			weather = name
-			priority = config.priority
-			minetest.log("selected (nil) " .. name)
-
-		else
-			local check = true
 		for _, attr in ipairs(attributes) do
-				if not is_acceptable_weather_param(params[attr], attr, config) then
-					check = false
+			if not is_acceptable_weather_param(params[attr], attr, effect.config) then
+				goto continue
 			end
 		end
-			if check then
-				weather = name
-				priority = config.priority
-				minetest.log("selected " .. name)
+		table.insert(effects, name)
+		::continue::
 	end
-		end
-	end
-	if type(weather) == "nil" then
-		minetest.log("error", "[Believable Weather] No default weather registered")
-	end
-	minetest.log(weather)
-	return weather
+	minetest.log(dump2(effects, "effects"))
+	return effects
 end

lib/main.lua

@@ -1,28 +1,33 @@
-local GSCYCLE = 0
-local temperature = 10
-local humidity = 100
-local wind = vector.new(10, 0, -0.25)
+local GSCYCLE = 0.05
+local RECALCCYCLE = 1
 
 weather_mod.weathers = {}
-function weather_mod.register_weather(name, weather)
+function weather_mod.register_effect(name, config, override)
 	-- TODO: check and sanitize
-	weather_mod.weathers[name] = weather
+	weather_mod.weathers[name] = {
+		config = config,
+		override = override,
+		sound_handles = {},
+		sound_volumes = {}
+	}
 end
 
-function weather_mod.set_weather(name)
-	if type(weather_mod.weathers[name]) == nil then
-		minetest.log("warning", "[Believable Weather] Weather does not exist")
-		return
+-- from https://stackoverflow.com/a/29133654
+local function merge(a, b)
+	if type(a) == 'table' and type(b) == 'table' then
+		for k,v in pairs(b) do if type(v)=='table' and type(a[k] or false)=='table' then merge(a[k],v) else a[k]=v end end
 	end
-	weather_mod.state.current_weather = name
+	return a
 end
 
-local function is_outside(player, wind)
-	local ppos = player:getpos()
-	local wind_pos = vector.multiply(wind,-1)
-	local skylight_pos = vector.add(ppos, vector.new(0, 40, 0))
-	local downfall_origin = vector.add(skylight_pos,wind_pos)
-	return weather_mod.is_outdoors(player, downfall_origin)
+local function build_effect_config(weather, climate)
+	local config = weather.config
+	local override = weather.override
+	if type(override) == "nil" then
+		return config
+	end
+	local dynamic_config = override(climate)
+	return merge(config, dynamic_config)
 end
 
 local function get_texture(particles)
@@ -34,19 +39,23 @@ end
 
 local function spawn_particles(player, particles, wind)
 	local ppos = player:getpos()
-	local wind_pos = vector.multiply(wind,-1)
-	local wind_speed = vector.length(wind)
+	local wind_pos = vector.multiply(weather_mod.state.wind,-1)
+	local wind_speed = vector.length(weather_mod.state.wind)
 
 	local texture = get_texture(particles)
 
 	local minp = vector.add(vector.add(ppos, particles.min_pos),wind_pos)
 	local maxp = vector.add(vector.add(ppos, particles.max_pos),wind_pos)
 
-	local vel = {x=wind.x,y=-particles.falling_speed,z=wind.z}
-	local acc = {x=0, y=0, z=0}
+	local vel = vector.new({
+		x=weather_mod.state.wind.x,
+		y=-particles.falling_speed,
+		z=weather_mod.state.wind.z
+	})
+	local acc = vector.new({x=0, y=0, z=0})
 
 	local exp = particles.exptime
-	local vertical = wind_speed < 3
+	local vertical = math.abs(vector.normalize(vel).y) >= 0.6
 
 	minetest.add_particlespawner({
 		amount=particles.amount,
@@ -69,62 +78,36 @@ local function spawn_particles(player, particles, wind)
 	})
 end
 
-local sound_handles = {}
-local function play_sound(player, sound)
-	local playername = player:get_player_name()
-	if not sound_handles[playername] then
-		local handle = minetest.sound_play(sound, {
-			to_player = playername,
-			loop = true
-		})
-		if handle then
-			sound_handles[playername] = handle
-		end
-	end
-end
-
-local function stop_sound(player)
-	local playername = player:get_player_name()
-	if sound_handles[playername] then
-		minetest.sound_stop(sound_handles[playername])
-		sound_handles[playername] = nil
-	end
-end
-
-local function handle_weather()
-	for _, player in ipairs(minetest.get_connected_players()) do
+local function handle_weather_effects(player)
 	local ppos = player:getpos()
-		weather_mod.set_weather(weather_mod.get_weather(ppos, wind))
+	local climate = weather_mod.get_climate(ppos)
+	local active_effects = weather_mod.get_effects(climate)
+	local sounds = {}
 
-		if ppos.y < weather_mod.settings.min_height or ppos.y > weather_mod.settings.max_height then
-			return
+	for _, effect in ipairs(active_effects) do
+		local weather = weather_mod.weathers[effect]
+		local config = build_effect_config(weather, climate)
+
+		local outdoors = weather_mod.is_outdoors(player)
+		if type(config.particles) ~= "nil" and outdoors then
+			spawn_particles(player, config.particles, wind)
 		end
-
-		local weather = weather_mod.weathers[weather_mod.state.current_weather]
-		local clouds = weather.clouds
-		clouds.speed = vector.multiply(wind, 2)
-		player:set_clouds(clouds)
-
-		weather_mod.set_headwind(player, wind)
-		--player:set_clouds({ density = 0.6, color = "#a4a0b6e5", speed = wind })
-
-		local outdoors = is_outside(player, wind)
-		if type(weather.particles) ~= "nil" and outdoors then
-			spawn_particles(player, weather.particles, wind)
-		end
-
-		if type(weather.sound) ~= "nil" and outdoors then
-			play_sound(player, weather.sound)
-		else
-			stop_sound(player)
+		if type(config.sound) ~= nil and outdoors then
+			sounds[effect] = config.sound
 		end
 	end
+	weather_mod.handle_sounds(player, sounds)
 end
 
 local timer = 0
 minetest.register_globalstep(function(dtime)
 	timer = timer + dtime
 	if timer < GSCYCLE then return end
+	for _, player in ipairs(minetest.get_connected_players()) do
+		handle_weather_effects(player)
+		if timer >= RECALCCYCLE then
+			weather_mod.set_clouds(player)
+		end
+	end
 	timer = 0
-	handle_weather()
 end)

lib/player.lua

@@ -27,46 +27,58 @@ function weather_mod.remove_physics(player, effect)
 	end
 end
 
--- function taken from weather mod
--- see https://github.com/theFox6/minetest_mod_weather/blob/master/weather/api.lua#L110
-local function raycast(player, origin)
-	local hitpos = vector.add(player:get_pos(),vector.new(0,1,0))
-	local ray = minetest.raycast(origin,hitpos)
-	local o = ray:next()
-	if not o then return false end
-	if o.type~="object" then return false end -- hit node or something
-	if not o.ref:is_player() then return false end -- hit different object
-	if o.ref:get_player_name() ~= player:get_player_name() then
-		return false --hit other player
-	end
-	o = ray:next()
-	if o then
-		minetest.log("warning","[Believable Weather] raycast hit more after hitting the player\n"..
-			dump2(o,"o"))
-	end
-	return true
-end
-
-local function check_light(player)
+function weather_mod.is_outdoors(player)
 	return minetest.get_node_light(player:getpos(), 0.5) == 15
 end
 
-function weather_mod.is_outdoors(player, origin)
-	if weather_mod.settings.raycasting then
-		return raycast(player, origin)
-	else
-		return check_light(player)
+function weather_mod.set_clouds(player)
+	if not weather_mod.settings.skybox then
+		return
+	end
+	local ppos = player:get_pos()
+	local humidity = weather_mod.get_humidity(ppos) / 200
+	local clouds = {}
+	clouds.speed = vector.multiply(weather_mod.state.wind, 2)
+	clouds.color = "#fff0f0c5"
+	clouds.density = math.max(math.min(humidity, 0.1), 0.9)
+	player:set_clouds(clouds)
+end
+
+function weather_mod.play_sound(player, effect)
+	local playername = player:get_player_name()
+	if not effect.sound_handles[playername] then
+		local handle = minetest.sound_play(effect.config.sound, {
+			to_player = playername,
+			loop = true
+		})
+		if handle then
+			effect.sound_handles[playername] = handle
+			effect.sound_volumes[playername] = effect.config.sound.gain or 1
+		end
 	end
 end
 
-function weather_mod.set_headwind(player, wind)
-	local movement = vector.normalize(player:get_player_velocity())
-	local product = vector.dot(movement, wind)
-	-- logistic function, scales between 0 and 2
-	-- see https://en.wikipedia.org/wiki/Logistic_function
-	local L = 2 -- maximum value
-	local k = 0.1 -- growth rate
-	local z = 1 -- midpoint
-	local factor = L / (1 + math.exp(-k * (product - z)))
-	weather_mod.add_physics(player, "speed", factor)
+function weather_mod.stop_sound(player, effect)
+	local playername = player:get_player_name()
+	if effect.sound_handles[playername] then
+		minetest.sound_stop(effect.sound_handles[playername])
+		effect.sound_handles[playername] = nil
+		effect.sound_volumes[playername] = nil
+	end
+end
+
+function weather_mod.handle_sounds(player, sounds)
+	local playername = player:get_player_name()
+	for name, effect in pairs(weather_mod.weathers) do
+		if type(effect.sound_handles[playername]) == "nil" and type(sounds[name]) ~= "nil" then
+			weather_mod.play_sound(player, effect)
+		elseif type(effect.sound_handles[playername]) ~= "nil" and type(sounds[name]) == "nil" then
+			weather_mod.stop_sound(player, effect)
+		elseif type(effect.sound_handles[playername]) ~= "nil" and type(sounds[name]) ~= "nil" then
+			local volume = sounds[name].gain or 1
+			if effect.sound_volumes[playername] ~= volume then
+				minetest.sound_fade(effect.sound_handles[playername], 1, volume)
+			end
+		end
+	end
 end

lib/wind.lua

@@ -0,0 +1,8 @@
+function weather_mod.set_headwind(player, wind)
+	local movement = vector.normalize(player:get_player_velocity())
+	local product = vector.dot(movement, wind)
+	-- logistic function, scales between 0.5 and 1.5
+	-- see https://en.wikipedia.org/wiki/Logistic_function
+	local factor = 1 / (1 + math.exp(-0.1 * (product - 0.5))) + 0.5
+	weather_mod.add_physics(player, "speed", factor)
+end

weathers/clear.lua

@@ -1,12 +0,0 @@
-local name = weather_mod.modname .. ":clear"
-
-local weather = {
-	priority = 0
-}
-
-weather.clouds = {
-	density = 0.3,
-	color = "#fff0f0c5"
-}
-
-weather_mod.register_weather(name, weather)

weathers/rain.lua

@@ -1,30 +1,48 @@
 local name = weather_mod.modname .. ":rain"
 
-local weather = {
-	priority = 10,
+local config = {}
+
+config.environment = {
 	spawn_puddles = true,
-	wetten_farmland = true,
-	sound = "weather_rain1"
+	wetten_farmland = true
 }
 
-weather.particles = {
+config.sound = {
+	name = "weather_rain",
+	gain = 1
+}
+
+config.particles = {
 	min_pos = {x=-9, y=7, z=-9},
 	max_pos = {x= 9, y=7, z= 9},
 	falling_speed=10,
-	amount=20,
+	amount=40,
 	exptime=0.8,
-	size=25,
-	texture="weather_rain.png"
+	size=1,
+	texture = "weather_raindrop.png"
 }
 
-weather.clouds = {
-	density = 0.5,
-	color = "#a4a0b6e5"
-}
-
-weather.conditions = {
+config.conditions = {
+	min_height = weather_mod.settings.min_height,
+	max_height = weather_mod.settings.max_height,
 	min_heat			= 30,
-	min_humidity	= 40
+	min_humidity	= 40,
+	max_humidity	= 60
 }
 
-weather_mod.register_weather(name, weather)
+local function override(params)
+	local avg_humidity = 40
+	local intensity = params.humidity / avg_humidity
+	local dynamic_config = {
+		sound = {
+			gain = math.min(intensity, 1.2)
+		},
+		particles = {
+			amount = 20 * math.min(intensity, 1.5),
+			falling_speed = 10 / math.min(intensity, 1.3)
+		}
+	}
+	return dynamic_config
+end
+
+weather_mod.register_effect(name, config, override)

weathers/rain_heavy.lua

@@ -0,0 +1,33 @@
+local name = weather_mod.modname .. ":rain_heavy"
+
+local config = {}
+
+config.environment = {
+	spawn_puddles = true,
+	wetten_farmland = true,
+	lightning = true
+}
+
+config.sound = {
+	name = "weather_rain",
+	gain = 1
+}
+
+config.particles = {
+	min_pos = {x=-9, y=7, z=-9},
+	max_pos = {x= 9, y=7, z= 9},
+	falling_speed=10,
+	amount=20,
+	exptime=0.8,
+	size=25,
+	texture="weather_rain.png"
+}
+
+config.conditions = {
+	min_height = weather_mod.settings.min_height,
+	max_height = weather_mod.settings.max_height,
+	min_heat			= 30,
+	min_humidity	= 60
+}
+
+weather_mod.register_effect(name, config)

weathers/rainstorm.lua

@@ -1,33 +0,0 @@
-local name = weather_mod.modname .. ":rainstorm"
-
-local weather = {
-	priority = 30,
-	damage = true,
-	spawn_puddles = true,
-	wetten_farmland = true,
-	lightning = true,
-	sound = "weather_rain2"
-}
-
-weather.particles = {
-	min_pos = {x=-9, y=7, z=-9},
-	max_pos = {x= 9, y=7, z= 9},
-	falling_speed=10,
-	amount=25,
-	exptime=0.8,
-	size=25,
-	texture="weather_rain.png"
-}
-
-weather.clouds = {
-	density = 0.7,
-	color = "#a4a0b6f5"
-}
-
-weather.conditions = {
-	min_heat				= 30,
-	min_humidity		= 60,
-	min_windspeed		= 5
-}
-
-weather_mod.register_weather(name, weather)

weathers/sandstorm.lua

@@ -1,12 +1,12 @@
 local name = weather_mod.modname .. ":sandstorm"
 
-local weather = {
-	priority = 50,
-	damage = true,
-	sound = "weather_wind"
+local config = {}
+
+config.environment = {
+	damage = true
 }
 
-weather.particles = {
+config.particles = {
 	min_pos = {x=-9, y=-5, z=-9},
 	max_pos = {x= 9, y= 5, z= 9},
 	falling_speed=1,
@@ -16,15 +16,12 @@ weather.particles = {
 	texture="weather_sand.png"
 }
 
-weather.clouds = {
-	density = 0.3,
-	color = "#a4a0b685"
-}
-
-weather.conditions = {
+config.conditions = {
+	min_height = weather_mod.settings.min_height,
+	max_height = weather_mod.settings.max_height,
 	min_heat				= 50,
 	max_humidity		= 25,
 	min_windspeed		= 6
 }
 
-weather_mod.register_weather(name, weather)
+weather_mod.register_effect(name, config)

weathers/snow.lua

@@ -1,32 +1,46 @@
 local name = weather_mod.modname .. ":snow"
 
-local weather = {
-	priority = 20,
+local config = {}
+
+config.environment = {
 	spawn_snow = true
 }
 
-weather.particles = {
+config.particles = {
 	min_pos = {x=-20, y= 3, z=-20},
 	max_pos = {x= 20, y=12, z= 20},
 	falling_speed=1,
-	amount=50,
-	exptime=15,
+	amount=40,
+	exptime=8,
 	size=1,
 	textures = {}
 }
 
 for i = 1,12,1 do
-	weather.particles.textures[i] = "weather_snowflake" .. i .. ".png"
+	config.particles.textures[i] = "weather_snowflake" .. i .. ".png"
 end
 
-weather.clouds = {
-	density = 0.5,
-	color = "#a4a0b6e5"
+config.conditions = {
+	min_height = weather_mod.settings.min_height,
+	max_height = weather_mod.settings.max_height,
+	max_heat				= 40,
+	min_humidity		= 40,
+	max_humidity		= 55
 }
 
-weather.conditions = {
-	max_heat				= 30,
-	min_humidity		= 40
-}
+local function override(params)
+	local avg_humidity = 40
+	local intensity = params.humidity / avg_humidity
+	local dynamic_config = {
+		sound = {
+			gain = math.min(intensity, 1.2)
+		},
+		particles = {
+			amount = 50 * math.min(intensity, 1.5),
+			falling_speed = 1 / math.min(intensity, 1.3)
+		}
+	}
+	return dynamic_config
+end
 
-weather_mod.register_weather(name, weather)
+weather_mod.register_effect(name, config, override)

weathers/snow_heavy.lua

@@ -0,0 +1,41 @@
+local name = weather_mod.modname .. ":snow_heavy"
+
+local config = {}
+
+config.environment = {
+	spawn_snow = true
+}
+
+config.particles = {
+	min_pos = {x=-12, y= 5, z=-12},
+	max_pos = {x= 12, y=9, z= 12},
+	falling_speed=1,
+	amount=1,
+	exptime=8,
+	size=12,
+	texture="weather_snow.png"
+}
+
+config.conditions = {
+	min_height = weather_mod.settings.min_height,
+	max_height = weather_mod.settings.max_height,
+	max_heat				= 40,
+	min_humidity		= 55
+}
+
+local function override(params)
+	local avg_humidity = 55
+	local intensity = params.humidity / avg_humidity
+	local dynamic_config = {
+		sound = {
+			gain = math.min(intensity, 1.2)
+		},
+		particles = {
+			amount = 50 * math.min(intensity, 1.5),
+			falling_speed = 1 / math.min(intensity, 1.3)
+		}
+	}
+	return dynamic_config
+end
+
+weather_mod.register_effect(name, config, override)

weathers/snowstorm.lua

@@ -1,36 +0,0 @@
-local name = weather_mod.modname .. ":snowstorm"
-
-local weather = {
-	priority = 40,
-	damage = true,
-	lightning = true,
-	spawn_snow = true,
-	sound = "weather_wind"
-}
-
-weather.particles = {
-	min_pos = {x=-9, y=-5, z=-9},
-	max_pos = {x= 9, y= 5, z= 9},
-	falling_speed=1.5,
-	amount=70,
-	exptime=6,
-	size=1,
-	textures = {}
-}
-
-for i = 1,12,1 do
-	weather.particles.textures[i] = "weather_snowflake" .. i .. ".png"
-end
-
-weather.clouds = {
-	density = 0.7,
-	color = "#a4a0b6f5"
-}
-
-weather.conditions = {
-	max_heat				= 30,
-	min_humidity		= 60,
-	min_windspeed   = 5
-}
-
-weather_mod.register_weather(name, weather)

weathers/storm.lua

@@ -0,0 +1,27 @@
+local name = weather_mod.modname .. ":storm"
+
+local config = {}
+
+config.sound = {
+	name = "weather_wind",
+	gain = 1
+}
+
+config.conditions = {
+	min_height = weather_mod.settings.min_height,
+	max_height = weather_mod.settings.max_height,
+	min_windspeed = 5
+}
+
+local function override(params)
+	local avg_windspeed = 6
+	local intensity = params.windspeed / avg_windspeed
+	local dynamic_config = {
+		sound = {
+			gain = math.min(intensity, 1.2)
+		}
+	}
+	return dynamic_config
+end
+
+weather_mod.register_effect(name, config, override)