Regen can now be a float and negative

init.lua

@@ -70,11 +70,6 @@ function mana.setmax(playername, value)
 end
 
 function mana.setregen(playername, value)
-	if value < 0 then
-		value = 0
-		minetest.log("info", "[mana] Warning: mana.setregen was called with negative value!")
-	end
-	value = mana.round(value)
 	mana.playerlist[playername].regen = value
 end
 
@@ -223,6 +218,7 @@ minetest.register_on_joinplayer(function(player)
 		mana.playerlist[playername].mana = 0
 		mana.playerlist[playername].maxmana = mana.settings.default_max
 		mana.playerlist[playername].regen = mana.settings.default_regen
+		mana.playerlist[playername].remainder = 0
 	end
 
 	if minetest.get_modpath("hudbars") ~= nil then
@@ -248,7 +244,19 @@ minetest.register_globalstep(function(dtime)
 			local name = players[i]:get_player_name()
 			if mana.playerlist[name] ~= nil then
 				if players[i]:get_hp() > 0 then
-					mana.add_up_to(name, mana.playerlist[name].regen * factor)
+					local plus = mana.playerlist[name].regen * factor
+					-- Compability check for version <= 1.0.2 which did not have the remainder field
+					if mana.playerlist[name].remainder ~= nil then
+						plus = plus + mana.playerlist[name].remainder
+					end
+					local plus_now = math.floor(plus)
+					local floor = plus - plus_now
+					if plus_now > 0 then
+						mana.add_up_to(name, plus_now)
+					else
+						mana.subtract_up_to(name, math.abs(plus_now))
+					end
+					mana.playerlist[name].remainder = floor
 				end
 			end
 		end