Implement dynamic cloud sizes, adjust cycle lengths

lib/api.lua

@@ -1,8 +1,9 @@
 local api = {}
 
 api.SHORT_CYCLE		= 0.03	-- for particles and fast animations
-api.DEFAULT_CYCLE	= 0.1	-- for most effect types
-api.LONG_CYCLE		= 0.5	-- for write operations and skybox changes
+api.DEFAULT_CYCLE	=  0.1	-- for most effect types
+api.MEDIUM_CYCKE	=	 2.0	-- for ressource intensive tasks
+api.LONG_CYCLE		=  5.0	-- for write operations and skybox changes
 
 climate_mod.weathers = {}
 climate_mod.effects = {}

lib/api_utility.lua

@@ -22,7 +22,7 @@ function utility.merge_tables(a, b)
 end
 
 -- see https://en.wikipedia.org/wiki/Logistic_function
-function utility.logistic_growth(value, max, growth, midpoint)
+function utility.sigmoid(value, max, growth, midpoint)
 	return max / (1 + math.exp(-growth * (value - midpoint)))
 end
 

lib/datastorage.lua

@@ -1,16 +1,14 @@
-local default_state = {
-	heat = 1,
-	humidity = 1,
-	wind_x = 0.5,
-	wind_z = 0.5,
-	time_last_check = 0,
-	time_current_day = 1
-}
-
 local state = minetest.get_mod_storage()
 
-if not state:contains("time_last_check") then
-	state:from_table({ fields = default_state })
+if not state:contains("noise_timer") then
+	state:from_table({
+		heat_random = 1,
+		humidity_random = 1,
+		humidity_base = 50,
+		wind_x = 0.5,
+		wind_z = 0.5,
+		noise_timer = math.random(0, 300000)
+	})
 end
 
 return state

lib/environment.lua

@@ -8,7 +8,7 @@ end
 local function get_heat_calendar()
 	-- European heat center in August instead of June
 	local day = minetest.get_day_count()
-	local progression = (day + 61) / 365
+	local progression = ((day + 61) % 365) / 365
 	return climate_api.utility.normalized_cycle(progression) * 0.6 + 0.7
 end