Separate weathers from engine

ca_weathers/snow_heavy.lua

@@ -0,0 +1,39 @@
+local name = "regional_weather:snow_heavy"
+
+local conditions = {
+	min_height = regional_weather.settings.min_height,
+	max_height = regional_weather.settings.max_height,
+	max_heat				= 40,
+	min_humidity		= 55
+}
+
+local effects = {}
+
+effects["regional_weather:spawn_snow"] = true
+
+effects["climate_api:particles"] = {
+	min_pos = {x=-12, y= 5, z=-12},
+	max_pos = {x= 12, y=9, z= 12},
+	exptime=8,
+	size=12,
+	texture="weather_snow.png"
+}
+
+local function generate_effects(params)
+	local avg_humidity = 55
+	local intensity = params.humidity / avg_humidity
+	local override = {}
+
+	override["climate_api:sound"] = {
+		gain = math.min(intensity, 1.2)
+	}
+
+	override["climate_api:particles"] = {
+		amount = 50 * math.min(intensity, 1.5),
+		falling_speed = 1 / math.min(intensity, 1.3)
+	}
+
+	return climate_api.utility.merge_tables(effects, override)
+end
+
+climate_api.register_weather(name, conditions, generate_effects)