Add experimental exhaustion to control hunger (based on player actions)

hunger.lua

@@ -11,6 +11,8 @@ local function poisenp(tick, time, time_left, player)
 	time_left = time_left + tick
 	if time_left < time then
 		minetest.after(tick, poisenp, tick, time, time_left, player)
+	else
+		--reset hud image
 	end
 	if player:get_hp()-1 > 0 then
 		player:set_hp(player:get_hp()-1)
@@ -40,6 +42,7 @@ function hud.item_eat(hunger_change, replace_with_item, poisen, heal)
 			end
 			-- Poison
 			if poisen then
+				--set hud-img
 				poisenp(1.0, poisen, 0, user)
 			end
 
@@ -259,3 +262,35 @@ if minetest.get_modpath("ethereal") then
    overwrite("ethereal:yellowleaves", 1, "", nil, 1)
    overwrite("ethereal:sashimi", 4)
 end
+
+-- player-action based hunger changes
+function hud.handle_node_actions(pos, oldnode, player, ext)
+	if not player or not player:is_player() then
+		return
+	end
+	local name = player:get_player_name()
+	local exhaus = hud.exhaustion[name]
+	local new = HUD_HUNGER_EXHAUST_PLACE
+	-- placenode event
+	if not ext then
+		new = HUD_HUNGER_EXHAUST_DIG
+	end
+	-- assume its send by main timer when movement detected
+	if not pos and not oldnode then
+		new = HUD_HUNGER_EXHAUST_MOVE
+	end
+	exhaus = exhaus + new
+	minetest.chat_send_all(exhaus)
+	if exhaus > HUD_HUNGER_EXHAUST_LVL then
+		exhaus = 0
+		local h = tonumber(hud.hunger[name])
+		h = h - 1
+		if h < 0 then h = 0 end
+		hud.hunger[name] = h
+		hud.set_hunger(player)
+	end
+	hud.exhaustion[name] = exhaus
+end
+
+minetest.register_on_placenode(hud.handle_node_actions)
+minetest.register_on_dignode(hud.handle_node_actions)

init.lua

@@ -45,7 +45,17 @@ if dump(minetest.hud_replace_builtin) ~= "nil" then
 end
 
 HUD_TICK = 0.1
-HUD_HUNGER_TICK = 300
+
+--Some hunger settings
+hud.exhaustion = {} -- Exhaustion is experimental!
+
+HUD_HUNGER_TICK = 800 -- time in seconds after that 1 hunger point is taken 
+HUD_HUNGER_EXHAUST_DIG = 3  -- exhaustion increased this value after digged node
+HUD_HUNGER_EXHAUST_PLACE = 1 -- exhaustion increased this value after placed
+HUD_HUNGER_EXHAUST_MOVE = 0.3 -- exhaustion increased this value if player movement detected
+HUD_HUNGER_EXHAUST_LVL = 160 -- at what exhaustion player saturation gets lowerd
+
+
 
 HUD_ENABLE_HUNGER = minetest.setting_getbool("hud_hunger_enable")
 if HUD_ENABLE_HUNGER == nil then
@@ -247,6 +257,7 @@ minetest.register_on_joinplayer(function(player)
 	if HUD_ENABLE_HUNGER then
 		hud.hunger[name] = hud.get_hunger(player)
 		hud.hunger_out[name] = hud.hunger[name]
+		hud.exhaustion[name] = 0
 	end
 	hud.armor[name] = 0
 	hud.armor_out[name] = 0
@@ -263,9 +274,11 @@ minetest.register_on_respawnplayer(function(player)
 	-- reset player breath since the engine doesnt
 	player:set_breath(11)
 	-- reset hunger (and save)
-	hud.hunger[player:get_player_name()] = 20
+	local name = player:get_player_name()
+	hud.hunger[name] = 20
 	if HUD_ENABLE_HUNGER then
 		minetest.after(0.5, hud.set_hunger, player)
+		hud.exhaustion[name] = 0
 	end
 end)
 
@@ -308,6 +321,14 @@ minetest.after(2.5, function()
 
 			 -- update all hud elements
 			 update_hud(player)
+			
+			 if HUD_ENABLE_HUNGER then
+				local controls = player:get_player_control()
+				-- Determine if the player is walking
+				if controls.up or controls.down or controls.left or controls.right then
+					hud.handle_node_actions(nil, nil, player)
+				end
+			 end
 			end
 		 end