Move entire sky color code into mcl_weather

mods/ENVIRONMENT/mcl_weather/description.txt

@@ -1 +1 @@
-Weather: Rain, snow, thunderstorm.
+Weather and sky handling: Rain, snow, thunderstorm, End and Nether ambience

mods/ENVIRONMENT/mcl_weather/skycolor.lua

@@ -6,7 +6,7 @@ mcl_weather.skycolor = {
 	force_update = true,
 
 	-- Update interval.
-	update_interval = 15,
+	update_interval = 0.5,
 
 	-- Main sky colors: starts from midnight to midnight. 
 	-- Please do not set directly. Use add_layer instead.
@@ -69,18 +69,19 @@ mcl_weather.skycolor = {
 
 	-- Update sky color. If players not specified update sky for all players.
 	update_sky_color = function(players)
-		local color = mcl_weather.skycolor.current_sky_layer_color()
-		if (color == nil) then
-			mcl_weather.skycolor.set_default_sky()
-			return
-		end
-
 		-- Override day/night ratio as well
 		players = mcl_weather.skycolor.utils.get_players(players)
+		local color = mcl_weather.skycolor.current_sky_layer_color()
 		for _, player in ipairs(players) do
 			local pos = player:get_pos()
 			local _, dim = mcl_util.y_to_layer(pos.y)
 			if dim == "overworld" then
+				if (color == nil) then
+					-- No sky layers
+					player:set_sky(nil, "regular")
+					player:override_day_night_ratio(nil)
+				else
+					-- Weather skies
 					player:set_sky(color, "plain", nil, true)
 
 					local lf = mcl_weather.get_current_light_factor()
@@ -100,7 +101,16 @@ mcl_weather.skycolor = {
 						player:override_day_night_ratio(nil)
 					end
 				end
-			-- Other dimensions are handled in mcl_playerplus
+			elseif dim == "end" then
+				local t = "mcl_playerplus_end_sky.png"
+				player:set_sky("#000000", "skybox", {t,t,t,t,t,t}, false)
+				player:override_day_night_ratio(0.5)
+			elseif dim == "nether" then
+				player:set_sky("#300808", "plain", nil, false)
+				player:override_day_night_ratio(nil)
+			elseif dim == "void" then
+				player:set_sky("#000000", "plain", nil, false)
+			end
 		end
 	end,
 
@@ -119,11 +129,6 @@ mcl_weather.skycolor = {
 
 	-- Initialy used only on 
 	update_transition_sky_color = function()
-		if #mcl_weather.skycolor.layer_names == 0 then
-			mcl_weather.skycolor.set_default_sky()
-			return
-		end
-
 		local multiplier = 100
 		local rounded_time = math.floor(mcl_weather.skycolor.transition_timer * multiplier)
 		if rounded_time >= mcl_weather.skycolor.transition_time * multiplier then
@@ -143,21 +148,6 @@ mcl_weather.skycolor = {
 		end
 	end,
 
-	-- Reset sky color to game default. If players not specified update sky for all players.
-	-- Could be sometimes useful but not recomended to use in general case as there may be other color layers
-	-- which needs to preserve.
-	set_default_sky = function(players)
-		local players = mcl_weather.skycolor.utils.get_players(players)
-		for _, player in ipairs(players) do
-			local pos = player:getpos()
-			local _, dim = mcl_util.y_to_layer(pos.y)
-			if dim == "overworld" then
-				player:set_sky(nil, "regular", nil, true)
-				player:override_day_night_ratio(nil)
-			end
-		end
-	end,
-
 	init_transition = function()
 		-- sadly default sky returns unpredictible colors so transition mode becomes usable only for user defined color layers
 		-- Here '2' means that one color layer existed before new added and transition is posible.

mods/PLAYER/mcl_playerplus/init.lua

@@ -153,25 +153,8 @@ minetest.register_globalstep(function(dtime)
 			end
 		end
 
-		-- Apply black sky in the Void and deal Void damage
+		-- Deal Void damage
 		local void, void_deadly = mcl_util.is_in_void(pos)
-		local _, dim = mcl_util.y_to_layer(pos.y)
-		-- Set dimension skies.
-		-- FIXME: Sky handling in MCL2 is held together with lots of duct tape.
-		-- This only works beause mcl_weather currently does not touch the sky for players below the height used for this check.
-		-- There should be a real skybox API.
-		if dim == "void" then
-			player:set_sky("#000000", "plain", nil, false)
-		elseif dim == "end" then
-			local t = "mcl_playerplus_end_sky.png"
-			player:set_sky("#000000", "skybox", {t,t,t,t,t,t}, false)
-			player:override_day_night_ratio(0.5)
-		elseif dim == "nether" then
-			player:set_sky("#300808", "plain", nil, false)
-			player:override_day_night_ratio(nil)
-		else
-			mcl_weather.skycolor.update_sky_color({player})
-		end
 		if void_deadly then
 			-- Player is deep into the void, deal void damage
 			if player:get_hp() > 0 then