Add Mana regeneration

init.lua

@@ -14,12 +14,24 @@ mana.playerlist = {}
 
 mana.settings = {}
 mana.settings.default_max = 200
+mana.settings.default_regen = 1
+mana.settings.regen_timer = 0.1
 
 do
 	local default_max = tonumber(minetest.setting_get("mana_default_max"))
 	if default_max ~= nil then
 		mana.settings.default_max = default_max
 	end
+
+	local default_regen = tonumber(minetest.setting_get("mana_default_regen"))
+	if default_regen ~= nil then
+		mana.settings.default_regen = default_regen
+	end
+
+	local regen_timer = tonumber(minetest.setting_get("mana_regen_timer"))
+	if regen_timer ~= nil then
+		mana.settings.regen_timer = regen_timer
+	end
 end
 
 
@@ -189,6 +201,7 @@ minetest.register_on_joinplayer(function(player)
 		mana.playerlist[playername] = {}
 		mana.playerlist[playername].mana = 0
 		mana.playerlist[playername].maxmana = mana.settings.default_max
+		mana.playerlist[playername].regen = mana.settings.default_regen
 	end
 
 	if minetest.get_modpath("hudbars") ~= nil then
@@ -199,6 +212,21 @@ minetest.register_on_joinplayer(function(player)
 end)
 
 
+--[===[
+	Mana regeneration
+]===]
+
+mana.regen_timer = 0
+
+minetest.register_globalstep(function(dtime)
+	mana.regen_timer = mana.regen_timer + dtime
+	if mana.regen_timer >= mana.settings.regen_timer then
+		for name, infotable in pairs(mana.playerlist) do
+			mana.add_up_to(name, infotable.regen)
+		end
+		mana.regen_timer = 0
+	end
+end)
 
 --[===[
 	HUD functions
@@ -209,7 +237,9 @@ if minetest.get_modpath("hudbars") ~= nil then
 
 	function mana.hud_update(playername)
 		local player = minetest.get_player_by_name(playername)
-		hb.change_hudbar(player, "mana", mana.get(playername), mana.getmax(playername))
+		if player ~= nil then
+			hb.change_hudbar(player, "mana", mana.get(playername), mana.getmax(playername))
+		end
 	end
 
 else