Remember Hardcore mode:

Add a flag to hardcore worlds on world creation; so that they remain
in hardcore mode despite any change settings change.

mods/HUD/hudbars/init.lua

@@ -486,16 +486,9 @@ function hb.get_hudbar_identifiers()
 	return ids
 end
 
-local hardcore_mode = minetest.settings:get_bool("hardcore_mode_enabled", false)
-if hardcore_mode then
-	heart_texture_fg = "hudbars_icon_health_hardcore.png"
-else
-	heart_texture_fg = "hudbars_icon_health.png"
-end
-
 --register built-in HUD bars
 if minetest.settings:get_bool("enable_damage") or hb.settings.forceload_default_hudbars then
-	hb.register_hudbar("health", 0xFFFFFF, S("Health"), { bar = "hudbars_bar_health.png", icon = heart_texture_fg, bgicon = "hudbars_bgicon_health.png" }, 0, 20, 20, false)
+	hb.register_hudbar("health", 0xFFFFFF, S("Health"), { bar = "hudbars_bar_health.png", icon = "hudbars_icon_health.png", bgicon = "hudbars_bgicon_health.png" }, 0, 20, 20, false)
 	hb.register_hudbar("breath", 0xFFFFFF, S("Breath"), { bar = "hudbars_bar_breath.png", icon = "hudbars_icon_breath.png", bgicon = "hudbars_bgicon_breath.png" }, 1, 10, 10, true)
 end
 

mods/ITEMS/mcl_potions/functions.lua

@@ -16,9 +16,15 @@ for _,_ in pairs(EF) do
 end
 
 local icon_ids = {}
-local hardcore_mode = minetest.settings:get_bool("hardcore_mode_enabled", false)
 
-if hardcore_mode then
+-- Hardcore mode Healthbar change
+local hardcore_mode = minetest.settings:get_bool("hardcore_mode_enabled", false)
+local file = io.open(minetest.get_worldpath().."/hardcore_mode.txt", "r")
+if file ~= nil then
+	hardcore_world = true
+end
+
+if hardcore_mode or hardcore_world then
 	heart_texture_fg = "hudbars_icon_health_hardcore.png"
 else
 	heart_texture_fg = "hudbars_icon_health.png"

mods/PLAYER/mcl_hardcore/init.lua

@@ -8,13 +8,24 @@ of the license, or (at your option) any later version.
 
 --]]
 
---Spectator mode:
+-- Spectator mode:
 --	Players are unable to interact with the world, invisible, have fast, fly & noclip, are immortal and their health/hunger hudbars are hidden.
+--
+--
+
+mcl_hardcore = {}
+
+-- Write Hardcore mode state to world.
+function mcl_hardcore.save()
+	local file = io.open(minetest.get_worldpath().."/hardcore_mode.txt", "w")
+	if file then
+		file:write("Enabled")
+		file:close()
+	end
+end
 
 
 -- Spectator mode
-mcl_hardcore = {}
-
 function mcl_hardcore.spectator_mode(player)
 	local meta = player:get_meta()
 	local player_name = player:get_player_name()
@@ -63,8 +74,18 @@ function mcl_hardcore.spectator_mode_disabled(player)
 end
 
 
-local hardcore_mode = minetest.settings:get_bool("hardcore_mode_enabled", false)
-if hardcore_mode then
+-- Hardcore mode
+function mcl_hardcore.hardcore_mode(player)
+	local meta = player:get_meta()
+	local player_name = player:get_player_name()
+	if meta:get_int("dead") == 1 then
+		mcl_hardcore.spectator_mode(player)
+		minetest.chat_send_player(player_name, "You died in hardcore mode; rejoining as a spectator.")
+	else
+		minetest.after(4, function(player)
+			hb.change_hudbar(player, "health", nil, nil,  "hudbars_icon_health_hardcore.png", nil, "hudbars_bar_health.png")
+		end, player)
+	end
 
 	minetest.register_on_dieplayer(function(player, reason)
 		local name = player:get_player_name()
@@ -81,20 +102,22 @@ if hardcore_mode then
 			minetest.chat_send_player(player_name, "You died in hardcore mode; respawning as a spectator.")
 		end
 	end)
-
-	-- If hardcore is enabled or re-enabled, & you've already died once; ensure that you're a spectator when rejoining.
-	minetest.register_on_joinplayer(function(player)
-		local meta = player:get_meta()
-		local player_name = player:get_player_name()
-		if meta:get_int("dead") == 1 then
-			mcl_hardcore.spectator_mode(player)
-			minetest.chat_send_player(player_name, "You died in hardcore mode; rejoining as a spectator.")
-		end
-	end)
-
-else
-	-- If hardcore disabled, make sure settings are back to basics via the 'spectator_mode_disabled' function.
-	minetest.register_on_joinplayer(function(player)
-		mcl_hardcore.spectator_mode_disabled(player)
-	end)
 end
+
+
+local hardcore_mode = minetest.settings:get_bool("hardcore_mode_enabled", false)
+--Set world state:
+minetest.register_on_joinplayer(function(player)
+	if minetest.get_gametime() <= 5 and hardcore_mode then
+		mcl_hardcore.save()
+	else
+		local file = io.open(minetest.get_worldpath().."/hardcore_mode.txt", "r")
+		if file ~= nil then
+			hardcore_world = true
+		end
+	end
+	if hardcore_mode or hardcore_world then
+		mcl_hardcore.hardcore_mode(player)
+	end
+
+end)

settingtypes.txt

@@ -39,7 +39,7 @@ mcl_doTileDrops (Blocks have drops) bool true
 # If enabled, TNT explosions destroy blocks.
 mcl_tnt_griefing (TNT destroys blocks) bool true
 
-# If enabled, you will only have 1 life to use. After death you will be dropped into spectator mode, and unable to interact with the world while 'hardcore_mode' is enabled.
+# If enabled, you will only have 1 life to use. After death you will be dropped into spectator mode, and unable to interact with the world.
 hardcore_mode_enabled (Enable Hardcore mode) bool false
 
 [Players]