added biome check based on noice parameters

heavy_rain.lua

@@ -8,7 +8,7 @@
 
 local heavy_rain = {}
 heavy_rain.last_check = 0
-heavy_rain.check_interval = 600
+heavy_rain.check_interval = 200
 
 -- Weather identification code
 heavy_rain.code = "heavy_rain"
@@ -26,7 +26,12 @@ local SKYCOLOR_LAYER = "happy_weather_heavy_rain_sky"
 heavy_rain.is_starting = function(dtime, position)
 	if heavy_rain.last_check + heavy_rain.check_interval < os.time() then
 		heavy_rain.last_check = os.time()
-		if math.random() < 0.05 then
+		local heavy_rain_chance = 0.06
+		if hw_utils.is_biome_tropic(position) then
+			heavy_rain_chance = 0.4
+		end
+
+		if math.random() < heavy_rain_chance then
 			happy_weather.request_to_end("light_rain")
       		happy_weather.request_to_end("rain")
 			return true
@@ -45,7 +50,9 @@ heavy_rain.is_ending = function(dtime)
 	if heavy_rain.last_check + heavy_rain.check_interval < os.time() then
 		heavy_rain.last_check = os.time()
 		if math.random() < 0.7 then
-			happy_weather.request_to_start("rain")
+			if math.random() < 0.4 then
+				happy_weather.request_to_start("rain")
+			end
 			return true
 		end
 	end
@@ -146,6 +153,7 @@ local add_wide_range_rain_particle = function(player)
 		  collisiondetection = true,
 		  collision_removal = true,
 		  vertical = true,
+		  
 		  texture = rain_drop_texture,
 		  playername = player:get_player_name()
 		})
@@ -178,6 +186,11 @@ heavy_rain.stop = function()
 end
 
 heavy_rain.in_area = function(position)
+	if hw_utils.is_biome_frozen(position) or 
+		hw_utils.is_biome_dry(position) then
+		return false
+	end
+
 	if position.y > -10 then
 		return true
 	end

light_rain.lua

@@ -8,7 +8,7 @@
 
 local light_rain = {}
 light_rain.last_check = 0
-light_rain.check_interval = 300
+light_rain.check_interval = 200
 
 -- Weather identification code
 light_rain.code = "light_rain"
@@ -144,6 +144,11 @@ local display_rain_particles = function(player)
 end
 
 light_rain.in_area = function(position)
+	if hw_utils.is_biome_frozen(position) or 
+		hw_utils.is_biome_dry(position) then
+		return false
+	end
+
 	if position.y > -10 then
 		return true
 	end

rain.lua

@@ -8,7 +8,7 @@
 
 local rain = {}
 rain.last_check = 0
-rain.check_interval = 400
+rain.check_interval = 300
 
 -- Weather identification code
 rain.code = "rain"
@@ -147,6 +147,11 @@ local display_rain_particles = function(player)
 end
 
 rain.in_area = function(position)
+  if hw_utils.is_biome_frozen(position) or 
+    hw_utils.is_biome_dry(position) then
+    return false
+  end
+
 	if position.y > -10 then
 		return true
 	end

snow.lua

@@ -7,6 +7,8 @@
 ------------------------------
 
 local snow = {}
+snow.last_check = 0
+snow.check_interval = 200
 
 -- Weather identification code
 snow.code = "snow"
@@ -19,6 +21,13 @@ local manual_trigger_end = false
 local SKYCOLOR_LAYER = "happy_weather_snow_sky"
 
 snow.is_starting = function(dtime, position)
+  if snow.last_check + snow.check_interval < os.time() then
+    snow.last_check = os.time()
+    if math.random() < 0.2 then
+      return true
+    end
+  end
+
 	if manual_trigger_start then
 		manual_trigger_start = false
 		return true
@@ -28,6 +37,13 @@ snow.is_starting = function(dtime, position)
 end
 
 snow.is_ending = function(dtime)
+  if snow.last_check + snow.check_interval < os.time() then
+    snow.last_check = os.time()
+    if math.random() < 0.5 then
+      return true
+    end
+  end
+
 	if manual_trigger_end then
 		manual_trigger_end = false
 		return true
@@ -111,6 +127,17 @@ snow.render = function(dtime, player)
   end
 end
 
+snow.in_area = function(position)
+  if hw_utils.is_biome_frozen(position) == false then
+    return false
+  end
+
+  if position.y > -10 then
+    return true
+  end
+  return false
+end
+
 snow.start = function()
 	manual_trigger_start = true
 end

thunder.lua

@@ -68,6 +68,11 @@ local calculate_thunder_strike_delay = function()
 end
 
 thunder.render = function(dtime, player)
+	if happy_weather.is_player_in_weather_area(player:get_player_name(), 
+		"heavy_rain") == false then
+		return
+	end
+
 	if thunder.next_strike <= os.time() then
 		lightning.strike()
 		calculate_thunder_strike_delay()

utils.lua

@@ -73,4 +73,57 @@ hw_utils.get_random_pos = function(player, offset)
 
   
   return {x=random_pos_x, y=random_pos_y, z=random_pos_z}
-end
+end
+
+local np_temp = {
+  offset = 50,
+  scale = 50,
+  spread = {x = 1000, y = 1000, z = 1000},
+  seed = 5349,
+  octaves = 3,
+  persist = 0.5,
+  lacunarity = 2.0
+}
+
+local np_humid = {
+  offset = 50,
+  scale = 50,
+  spread = {x = 1000, y = 1000, z = 1000},
+  seed = 842,
+  octaves = 3,
+  persist = 0.5,
+  lacunarity = 2.0
+}
+
+hw_utils.is_biome_frozen = function(position)
+  local posx = math.floor(position.x)
+  local posz = math.floor(position.z)
+  local noise_obj = minetest.get_perlin(np_temp)
+  local noise_temp = noise_obj:get2d({x = posx, y = posz})
+
+  -- below 35 heat biome considered to be frozen type
+  return noise_temp < 35
+end
+
+hw_utils.is_biome_dry = function(position)
+  local posx = math.floor(position.x)
+  local posz = math.floor(position.z)
+  local noise_obj = minetest.get_perlin(np_humid)
+  local noise_humid = noise_obj:get2d({x = posx, y = posz})
+
+  -- below 50 humid biome considered to be dry type (at least by this mod)
+  return noise_humid < 50
+end
+
+hw_utils.is_biome_tropic = function(position)
+  local posx = math.floor(position.x)
+  local posz = math.floor(position.z)
+  local noise_obj = minetest.get_perlin(np_humid)
+  local noise_humid = noise_obj:get2d({x = posx, y = posz})
+  noise_obj = minetest.get_perlin(np_temp)
+  local noise_temp = noise_obj:get2d({x = posx, y = posz})
+
+  -- humid and temp values are taked by testing flying around world (not sure actually)
+  return noise_humid > 55 and noise_temp > 80
+end
+