update recreation method

api.lua

@@ -25,6 +25,9 @@ local player_addsub_attribute=function(player,attrib,val,maf)
 	local new_val = oldvalue + val
 	if maf ~= nil then
 		new_val=(oldvalue*maf + val)/(maf + 1)
+		if val < 0 then
+			new_val=math.floor(new_val)
+		end
 	end
 	xpfw.player_set_attribute(player,attrib,new_val)
 end
@@ -46,7 +49,6 @@ end
 xpfw.player_sub_attribute=function(player,attrib,val)
 	local nval=val
 	local playername=player:get_player_name()
---	local att_def=xpfw.attributes[attrib]
 	local att_def=M.player[playername].attributes[attrib]
 	if val==nil then
 		nval=att_def.max or 20
@@ -320,7 +322,7 @@ minetest.register_globalstep(function(dtime)
 				player:hud_change(playerdata.hidx,"text",act_print)
 			end
 			
-			if playerdata.dtime>5 then
+			if playerdata.dtime>xpfw.rtime then
 				playerdata.dtime=0
 --				print(dump2(player:hud_get_flags()))
 				for i,att_def in pairs(xpfw.attributes) do

config.lua

@@ -11,6 +11,7 @@ end
 xpfw.prefix=minetest.settings:get("xpfw.prefix") or "xp"
 xpfw.mean_weight=tonumber(minetest.settings:get("xpfw.mean_weight")) or 500
 xpfw.experience_max=tonumber(minetest.settings:get("xpfw.experience_max")) or 20
+xpfw.rtime=tonumber(minetest.settings:get("xpfw.recreation_time")) or 5
 
 for i,attr in ipairs({"walked","distance","swam","login","dug","build","deaths","spoke","killed_mobs","killed_player",
 		"logon"}) do

settingtypes.txt

@@ -1,4 +1,5 @@
 xpfw.prefix (Prefix for variable name) string "xp"
+xpfw.recreation_time (Global time step to reduce mean values) int 5 1 100
 xpfw.light_mean_weight (Weight factor for light value) int 5000 1 10000
 xpfw.light_mean_default (Weight factor for light value) int 11 0 14
 xpfw.mean_weight (Weight factor for calculating mean value) int 5000 1 10000