Separate weathers from engine

ca_weathers/storm.lua

@@ -0,0 +1,27 @@
+local name = "regional_weather:storm"
+
+local conditions = {
+	min_height = regional_weather.settings.min_height,
+	max_height = regional_weather.settings.max_height,
+	min_windspeed = 3.5
+}
+
+local effects = {}
+
+effects["climate_api:sound"] = {
+	name = "weather_wind"
+}
+
+local function generate_effects(params)
+	local avg_windspeed = 5
+	local intensity = params.windspeed / avg_windspeed
+	local override = {}
+
+	override["climate_api:sound"]  = {
+		gain = math.min(intensity, 1.2)
+	}
+
+	return climate_api.utility.merge_tables(effects, override)
+end
+
+climate_api.register_weather(name, conditions, generate_effects)