Added all hudbars by @Wuzzy2

- Removed hud (incompatible)
 - Copied all hunger.lua's values in new hunger.lua (hbhunger)
 - Added hbhunger, hbarmor
 - Updated sprint mod

mods/hudbars/API.md

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+API documentation for the HUD bars mod 1.0.2
+============================================
+
+## Introduction
+This API allows you to add, change, hide and unhide custom HUD bars for this mod.
+
+## Overview
+To give you a *very* brief overview over this API, here is the basic workflow on how to add your own custom HUD bar:
+
+* Create images for your HUD bar
+* Call `hb.register_hudbar` to make the definition of the HUD bar known to this mod
+* Call `hb.init_hudbar` for each player for which you want to use previously defined HUD bar
+* Use `hb.change_hudbar` whenever you need to change the values of a HUD bar of a certain player
+* If you need it: Use `hb.hide_hudbar` and `hb.unhide_hudbar` to hide or unhide HUD bars of a certain player
+
+## The basic rules
+In order to use this API, you should be aware of a few basic rules in order to understand it:
+
+* A HUD bar is an approximate graphical representation of the ratio of a current value and a maximum value, i.e. current health of 15 and maximum health of 20. A full HUD bar represents 100%, an empty HUD bar represents 0%.
+* The current value must always be equal to or smaller then the maximum 
+* Both current value and maximum must not be smaller than 0
+* Both current value and maximum must be real numbers. So no NaN, infinity, etc.
+* The HUD bar will be hidden if the maximum equals 0. This is intentional.
+* The health and breath HUD bars are hardcoded.
+
+These are soft rules, the HUD bars mod will not enforce all of these.
+But this mod has been programmed under the assumption that these rules are followed, for integrity.
+
+## Adding a HUD bar
+To make a new HUD bar known to this mod, you need …
+
+* … an image of size 2×16 for the bar
+* … an icon of size 16×16 (optional)
+* … to register it with `hb.register_hudbar`
+
+### Bar image
+The image for the bar will be repeated horizontally to denote the “value” of the HUD bar.
+It **must** be of size 2×16.
+If neccessary, the image will be split vertically in half, and only the left half of the image
+is displayed. So the final HUD bar will always be displayed on a per-pixel basis.
+
+The default bar images are single-colored, but you can use other styles as well, for instance,
+a vertical gradient.
+
+### Icon
+A 16×16 image shown left of the HUD bar. This is optional.
+
+### `hb.register_hudbar(identifier, text_color, label, textures, default_start_value, default_start_max, default_start_hidden, format_string)`
+This function registers a new custom HUD bar definition to the HUD bars mod, so it can be later used to be displayed, changed, hidden
+and unhidden on a per-player basis.
+Note this does not yet display the HUD bar.
+
+The HUD bars will be displayed in a “first come, first serve” order. This mod does not allow fow a custom order or a way to set it
+manually in a reliable way.
+
+
+#### Parameters
+* `identifier`: A globally unique internal name for the HUD bar, will be used later to refer to it. Please only rely on alphanumeric characters for now. The identifiers “`health`” and “`breath`” are used internally for the built-in health and breath bar, respectively. Please do not use these names.
+* `text_color`: A 3-octet number defining the color of the text. The octets denote, in this order red, green and blue and range from `0x00` (complete lack of this component) to `0xFF` (full intensity of this component). Example: `0xFFFFFF` for white.
+* `label`: A string which is displayed on the HUD bar itself to describe the HUD bar. Try to keep this string short.
+* `textures`: A table with the following fields:
+ * `bar`: The file name of the bar image (as string).
+ * `icon`: The file name of the icon, as string. This field can be `nil`, in which case no icon will be used.
+* `default_start_value`: If this HUD bar is added to a player, and no initial value is specified, this value will be used as initial current value
+* `default_max_value`: If this HUD bar is added to a player, and no initial maximum value is specified, this value will be used as initial maximum value
+* `default_start_hidden`: The HUD bar will be initially start hidden by default when added to a player. Use `hb.unhide_hudbar` to unhide it.
+* `format_string`: This is optional; You can specify an alternative format string display the final text on the HUD bar. The default format string is “`%s: %d/%d`” (in this order: Label, current value, maximum value). See also the Lua documentation of `string.format`.
+
+#### Return value
+Always `nil`.
+
+
+## Displaying a HUD bar
+After a HUD bar has been registered, they are not yet displayed yet for any player. HUD bars must be
+explicitly initialized on a per-player basis.
+
+You probably want to do this in the `minetest.register_on_joinplayer`.
+
+### `hb.init_hudbar(player, identifier, start_value, start_max, start_hidden)`
+This function initialzes and activates a previously registered HUD bar and assigns it to a
+certain client/player. This has only to be done once per player and after that, you can change
+the values using `hb.change_hudbar`.
+
+However, if `start_hidden` was set to `true` for the HUD bar (in `hb.register_hudbar`), the HUD bar
+will initially be hidden, but the HUD elements are still sent to the client. Otherwise,
+the HUD bar will be initially be shown to the player.
+
+#### Parameters
+* `player`: `ObjectRef` of the player to which the new HUD bar should be displayed to.
+* `identifier`: The identifier of the HUD bar type, as specified in `hb.register_hudbar`.
+* `start_value`: The initial current value of the HUD bar. This is optional, `default_start_value` of the registration function will be used, if this is `nil`.
+* `start_max`: The initial maximum value of the HUD bar. This is optional, `default_start_max` of the registration function will be used, if this is `nil`
+* `start_hidden`: Whether the HUD bar is initially hidden. This is optional, `default_start_hidden` of the registration function will be used as default
+
+#### Return value
+Always `nil`.
+
+
+
+## Modifying a HUD bar
+After a HUD bar has been added, you can change the current and maximum value on a per-player basis.
+You use the function `hb.change_hudbar` for this.
+
+### `hb.change_hudbar(player, identifier, new_value, new_max_value)`
+Changes the values of an initialized HUD bar for a certain player. `new_value` and `new_max_value`
+can be `nil`; if one of them is `nil`, that means the value is unchanged. If both values
+are `nil`, this function is a no-op.
+This function also tries minimize the amount of calls to `hud_change` of the Minetest Lua API, and
+therefore, network traffic. `hud_change` is only called if it is actually needed, i.e. when the
+actual length of the bar or the displayed string changed, so you do not have to worry about it.
+
+#### Parameters
+* `player`: `ObjectRef` of the player to which the HUD bar belongs to
+* `identifier`: The identifier of the HUD bar type to change, as specified in `hb.register_hudbar`.
+* `new_value`: The new current value of the HUD bar
+* `new_max_value`: The new maximum value of the HUD bar
+
+#### Return value
+Always `nil`.
+
+
+## Hiding and unhiding a HUD bar
+You can also hide custom HUD bars, meaning they will not be displayed for a certain player. You can still
+use `hb.change_hudbar` on a hidden HUD bar, the new values will be correctly displayed after the HUD bar
+has been unhidden. Both functions will only call `hud_change` if there has been an actual change to avoid
+unneccessary traffic.
+
+Note that the hidden state of a HUD bar will *not* be saved by this mod on server shutdown, so you may need
+to write your own routines for this or by setting the correct value for `start_hidden` when calling
+`hb.init_hudbar`.
+
+### `hb.hide_hudbar(player, identifier)`
+Hides the specified HUD bar from the screen of the specified player.
+
+#### Parameters
+* `player`: `ObjectRef` of the player to which the HUD bar belongs to
+* `identifier`: The identifier of the HUD bar type to hide, as specified in `hb.register_hudbar`.
+
+#### Return value
+Always `nil`.
+
+
+### `hb.unhide_hudbar(player, identifier)`
+Makes a previously hidden HUD bar visible again to a player.
+
+#### Parameters
+* `player`: `ObjectRef` of the player to which the HUD bar belongs to
+* `identifier`: The identifier of the HUD bar type to unhide, as specified in `hb.register_hudbar`.
+
+#### Return value
+Always `nil`.
+
+
+## Reading HUD bar information
+It is also possible to read information about an active HUD bar.
+
+### `hb.get_hudbar_state(player, identifier)`
+Returns the current state of the active player's HUD bar.
+
+#### Parameters
+* `player`: `ObjectRef` of the player to which the HUD bar belongs to
+* `identifier`: The identifier of the HUD bar type to hide, as specified in `hb.register_hudbar`.
+
+#### Return value
+A table which holds information on the current state of the HUD bar. Note the table is a deep
+copy of the internal HUD bar state, it is *not* a reference; the information hold by the table is
+only true for the moment you called this function. The fields of this table are:
+
+* `value`: Current value of HUD bar.
+* `max`: Current maximum value of HUD bar.
+* `hidden`: Boolean denoting whether the HUD bar is hidden.
+* `barlength`: The length of the HUD bar in pixels. This field is meaningless if the HUD bar is currently hidden.
+* `text`: The text shown on the HUD bar. This fiels is meaningless if the HUD bar is currently hidden.

mods/hudbars/README.txt

@@ -0,0 +1,48 @@
+Minetest mod: HUD bars
+======================
+Version: 1.0.2
+
+This software uses semantic versioning, as defined by version 2.0.0 of the SemVer
+standard. <http://semver.org/>
+
+
+License of source code: WTFPL
+-----------------------------
+Author: Wuzzy (2015)
+Forked from the “Better HUD” [hud] mod by BlockMen.
+
+
+Using the mod:
+--------------
+This mod changes the HUD of Minetest. It replaces the default health and breath symbols by horizontal colored bars with text showing
+the number.
+
+Furthermore, it enables other mods to add their own custom bars to the HUD, this mod will place them accordingly.
+
+You can create a “hudbars.conf” file to customize the positions of the health and breath bars. Take a look at “hudbars.conf.example”
+to get more infos. The lines starting with “--” are comments, remove the two dashes to activate a setting. Settings which are not
+set will use a default value instead.
+
+
+IMPORTANT:
+Keep in mind if running a server with this mod, that the custom position should be displayed correctly on every screen size!
+
+API:
+----
+The API is used to add your own custom HUD bars.
+Documentation for the API of this mod can be found in API.md.
+
+
+License of textures:
+--------------------
+hudbars_icon_health.png - celeron55 (CC BY-SA 3.0), modified by BlockMen
+hudbars_icon_breath.png - kaeza (WTFPL), modified by BlockMen
+hudbars_bar_health.png - Wuzzy (WTFPL)
+hudbars_bar_breath.png - Wuzzy (WTFPL)
+hudbars_bar_background.png - Wuzzy(WTFPL)
+
+This program is free software. It comes without any warranty, to
+the extent permitted by applicable law. You can redistribute it
+and/or modify it under the terms of the Do What The Fuck You Want
+To Public License, Version 2, as published by Sam Hocevar. See
+http://sam.zoy.org/wtfpl/COPYING for more details.

mods/hudbars/changelog.txt

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+Note: This software uses semantic versioning,
+as of version 2.0.0 of the standard <http://semver.org/>.
+
+0.1.0
+-----
+- Initial release, forked from mod “Better HUD” [hud].
+
+0.2.0
+-----
+- Add API documentation
+
+0.3.0
+-----
+- Rename main table from “hud” to “hb” (affects function names!)
+- Arguments 3-4 of hb.change_hudbar can be nil for values which should not change
+- Add proper function hb.init_hudbar, replaces odd call to hud.hudtables[identifier].add_all
+- Update API documentation and fix mistakes
+- Use “hudbars.conf” instead of “hud.conf”
+
+0.4.0
+-----
+- New function: hb.get_hudbar_state to get information about the state of an active HUD bar, such as values, whether it is hidden, etc.
+- hb.change_hudbar has been optimized to call hud_change fewer times, which is hopefully good for networking
+- Rename hb.register_hudbar parameter “start_hide” to “start_hidden”
+- start_hidden parameter now finally works
+- Do not affect other HUD flags (crosshair, wielditem, etc.) when starting mod
+- Show error message when trying to call hb.init_hudbar or hb.change_hudbar with bad values
+- Update documentation
+- Lots of refactoring
+- Health and breath bar now use API
+
+1.0.0
+-----
+- Add new parameter start_hidden to hb.init_hudbar, specified whether HUD bar is hidden on start
+- Copy-editing of API.md and README.txt
+- Internal: Fix add_all weirdness
+
+1.0.1
+-----
+- Fix race condition causing crash at start of server
+
+1.0.2
+-----
+- Fix other HUD elements disappearing for rejoining players
+- Remove pointless delays for initializing the HUD for new or rejoining players

mods/hudbars/hudbars.conf.example

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+-- HUD bars example config file
+-------------------------------
+-- Currently you can customize the starting position of the first bottom two HUD bars
+-- and the vertical margin. That's all.
+-- Remove the two dashes to activate a setting. Lua syntax is used.
+-- The examples are all equal to the mod defaults
+-------------------------------------------------------------------------------------------------------
+
+
+-- Vertical space between two HUD bars
+-- hb.settings.vmargin = 24
+
+-- Pos of the first HUD bar the the left (“pos”, as in hud definition of hud_add of Minetest Lua API)
+-- hb.settings.pos_left = { x=0.5, y=1 }
+
+-- Pos of the first HUD bar the the right
+-- hb.settings.pos_right= { x = 0.5, y = 1 }
+
+-- Offset of the first HUD bar to the left (“offset”, as in HUD definition)
+-- hb.settings.start_offset_left = { x = -175, y = -70 }
+
+-- Offset of the first HUD bar to the right
+-- hb.settings_start_offset_right = { x = 15, y = -70 }
+

mods/hudbars/init.lua

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+hb = {}
+
+hb.hudtables = {}
+
+-- number of registered HUD bars
+hb.hudbars_count = 0
+
+hb.settings = {}
+
+-- default settings
+hb.settings.max_bar_length = 160
+
+-- statbar positions
+hb.settings.pos_left = { x=0.5, y=1 }
+hb.settings.pos_right= { x = 0.5, y = 1 }
+hb.settings.start_offset_left = { x = -175, y = -70 }
+hb.settings.start_offset_right = { x = 15, y = -70 }
+
+hb.settings.vmargin = 24
+hb.settings.tick = 0.1
+
+-- Table which contains all players with active default HUD bars (only for internal use)
+hb.players = {}
+
+function hb.value_to_barlength(value, max)
+	if max == 0 then
+		return 0
+	else
+		return math.ceil((value/max) * hb.settings.max_bar_length)
+	end
+end
+
+function hb.get_hudtable(identifier)
+	return hb.hudtables[identifier]
+end
+
+function hb.register_hudbar(identifier, text_color, label, textures, default_start_value, default_start_max, default_start_hidden, format_string)
+	local hudtable = {}
+	local pos, offset
+	if hb.hudbars_count % 2 == 0 then
+		pos = hb.settings.pos_left
+		offset = {
+			x = hb.settings.start_offset_left.x,
+			y = hb.settings.start_offset_left.y - hb.settings.vmargin * math.floor(hb.hudbars_count/2)
+		}
+	else
+		pos = hb.settings.pos_right
+		offset = {
+			x = hb.settings.start_offset_right.x,
+			y = hb.settings.start_offset_right.y - hb.settings.vmargin * math.floor((hb.hudbars_count-1)/2)
+		}
+	end
+	if format_string == nil then
+		format_string = "%s: %d/%d"
+	end
+
+	hudtable.add_all = function(player, hudtable, start_value, start_max, start_hidden)
+		if start_value == nil then start_value = hudtable.default_start_value end
+		if start_max == nil then start_max = hudtable.default_start_max end
+		if start_hidden == nil then start_hidden = hudtable.default_start_hidden end
+		local ids = {}
+		local state = {}
+		local name = player:get_player_name()
+		local bgscale, iconscale, text, barnumber
+		if start_max == 0 or start_hidden then
+			bgscale = { x=0, y=0 }
+		else
+			bgscale = { x=1, y=1 }
+		end
+		if start_hidden then
+			iconscale = { x=0, y=0 }
+			barnumber = 0
+			text = ""
+		else
+			iconscale = { x=1, y=1 }
+			barnumber = hb.value_to_barlength(start_value, start_max)
+			text = string.format(format_string, label, start_value, start_max)
+		end
+		ids.bg = player:hud_add({
+			hud_elem_type = "image",
+			position = pos,
+			scale = bgscale,
+			text = "hudbars_bar_background.png",
+			alignment = {x=1,y=1},
+			offset = { x = offset.x - 1, y = offset.y - 1 },
+		})
+		if textures.icon ~= nil then
+			ids.icon = player:hud_add({
+				hud_elem_type = "image",
+				position = pos,
+				scale = iconscale,
+				text = textures.icon,
+				alignment = {x=-1,y=1},
+				offset = { x = offset.x - 3, y = offset.y },
+			})
+		end
+		ids.bar = player:hud_add({
+			hud_elem_type = "statbar",
+			position = pos,
+			text = textures.bar,
+			number = barnumber,
+			alignment = {x=-1,y=-1},
+			offset = offset,
+		})
+		ids.text = player:hud_add({
+			hud_elem_type = "text",
+			position = pos,
+			text = text,
+			alignment = {x=1,y=1},
+			number = text_color,
+			direction = 0,
+			offset = { x = offset.x + 2,  y = offset.y },
+		})
+		-- Do not forget to update hb.get_hudbar_state if you add new fields to the state table
+		state.hidden = start_hidden
+		state.value = start_value
+		state.max = start_max
+		state.text = text
+		state.barlength = hb.value_to_barlength(start_value, start_max)
+
+		local main_error_text =
+			"[hudbars] Bad initial values of HUD bar identifier “"..tostring(identifier).."” for player "..name..". "
+
+		if start_max < start_value then
+			minetest.log("error", main_error_text.."start_max ("..start_max..") is smaller than start_value ("..start_value..")!")
+		end
+		if start_max < 0 then
+			minetest.log("error", main_error_text.."start_max ("..start_max..") is smaller than 0!")
+		end
+		if start_value < 0 then
+			minetest.log("error", main_error_text.."start_value ("..start_value..") is smaller than 0!")
+		end
+
+		hb.hudtables[identifier].hudids[name] = ids
+		hb.hudtables[identifier].hudstate[name] = state
+	end
+
+	hudtable.identifier = identifier
+	hudtable.format_string = format_string
+	hudtable.label = label
+	hudtable.hudids = {}
+	hudtable.hudstate = {}
+	hudtable.default_start_hidden = default_start_hidden
+	hudtable.default_start_value = default_start_value
+	hudtable.default_start_max = default_start_max
+
+	hb.hudbars_count= hb.hudbars_count + 1
+
+	hb.hudtables[identifier] = hudtable
+end
+
+function hb.init_hudbar(player, identifier, start_value, start_max, start_hidden)
+	local hudtable = hb.get_hudtable(identifier)
+	hb.hudtables[identifier].add_all(player, hudtable, start_value, start_max, start_hidden)
+end
+
+function hb.change_hudbar(player, identifier, new_value, new_max_value)
+	if new_value == nil and new_max_value == nil then
+		return
+	end
+
+	local name = player:get_player_name()
+	local hudtable = hb.get_hudtable(identifier)
+	local value_changed, max_changed = false, false
+
+	if new_value ~= nil then
+		if new_value ~= hudtable.hudstate[name].value then
+			hudtable.hudstate[name].value = new_value
+			value_changed = true
+		end
+	else
+		new_value = hudtable.hudstate[name].value
+	end
+	if new_max_value ~= nil then
+		if new_max_value ~= hudtable.hudstate[name].max then
+			hudtable.hudstate[name].max = new_max_value
+			max_changed = true
+		end
+	else
+		new_max_value = hudtable.hudstate[name].max
+	end
+
+	local main_error_text =
+		"[hudbars] Bad call to hb.change_hudbar, identifier: “"..tostring(identifier).."”, player name: “"..name.."”. "
+	if new_max_value < new_value then
+		minetest.log("error", main_error_text.."new_max_value ("..new_max_value..") is smaller than new_value ("..new_value..")!")
+	end
+	if new_max_value < 0 then
+		minetest.log("error", main_error_text.."new_max_value ("..new_max_value..") is smaller than 0!")
+	end
+	if new_value < 0 then
+		minetest.log("error", main_error_text.."new_value ("..new_value..") is smaller than 0!")
+	end
+
+	if hudtable.hudstate[name].hidden == false then
+		if max_changed then
+			if hudtable.hudstate[name].max == 0 then
+				player:hud_change(hudtable.hudids[name].bg, "scale", {x=0,y=0})
+			else
+				player:hud_change(hudtable.hudids[name].bg, "scale", {x=1,y=1})
+			end
+		end
+
+		if value_changed or max_changed then
+			local new_barlength = hb.value_to_barlength(new_value, new_max_value)
+			if new_barlength ~= hudtable.hudstate[name].barlength then
+				player:hud_change(hudtable.hudids[name].bar, "number", hb.value_to_barlength(new_value, new_max_value))
+				hudtable.hudstate[name].barlength = new_barlength
+			end
+
+			local new_text = string.format(hudtable.format_string, hudtable.label, new_value, new_max_value)
+			if new_text ~= hudtable.hudstate[name].text then
+				player:hud_change(hudtable.hudids[name].text, "text", new_text)
+				hudtable.hudstate[name].text = new_text
+			end
+		end
+	end
+end
+
+function hb.hide_hudbar(player, identifier)
+	local name = player:get_player_name()
+	local hudtable = hb.get_hudtable(identifier)
+	if(hudtable.hudstate[name].hidden == false) then
+		if hudtable.hudids[name].icon ~= nil then
+			player:hud_change(hudtable.hudids[name].icon, "scale", {x=0,y=0})
+		end
+		player:hud_change(hudtable.hudids[name].bg, "scale", {x=0,y=0})
+		player:hud_change(hudtable.hudids[name].bar, "number", 0)
+		player:hud_change(hudtable.hudids[name].text, "text", "")
+		hudtable.hudstate[name].hidden = true
+	end
+end
+
+function hb.unhide_hudbar(player, identifier)
+	local name = player:get_player_name()
+	local hudtable = hb.get_hudtable(identifier)
+	if(hudtable.hudstate[name].hidden) then
+		local name = player:get_player_name()
+		local value = hudtable.hudstate[name].value
+		local max = hudtable.hudstate[name].max
+		if hudtable.hudids[name].icon ~= nil then
+			player:hud_change(hudtable.hudids[name].icon, "scale", {x=1,y=1})
+		end
+		if hudtable.hudstate[name].max ~= 0 then
+			player:hud_change(hudtable.hudids[name].bg, "scale", {x=1,y=1})
+		end
+		player:hud_change(hudtable.hudids[name].bar, "number", hb.value_to_barlength(value, max))
+		player:hud_change(hudtable.hudids[name].text, "text", tostring(string.format(hudtable.format_string, hudtable.label, value, max)))
+		hudtable.hudstate[name].hidden = false
+	end
+end
+
+function hb.get_hudbar_state(player, identifier)
+	local ref = hb.get_hudtable(identifier).hudstate[player:get_player_name()]
+	-- Do not forget to update this chunk of code in case the state changes
+	local copy = {
+		hidden = ref.hidden,
+		value = ref.value,
+		max = ref.max,
+		text = ref.text,
+		barlength = ref.barlength,
+	}
+	return copy
+end
+
+--register built-in HUD bars
+if minetest.setting_getbool("enable_damage") then
+	hb.register_hudbar("health", 0xFFFFFF, "Health", { bar = "hudbars_bar_health.png", icon = "hudbars_icon_health.png" }, 20, 20, false)
+	hb.register_hudbar("breath", 0xFFFFFF, "Breath", { bar = "hudbars_bar_breath.png", icon = "hudbars_icon_breath.png" }, 10, 10, true)
+end
+
+--load custom settings
+local set = io.open(minetest.get_modpath("hudbars").."/hudbars.conf", "r")
+if set then
+	dofile(minetest.get_modpath("hudbars").."/hudbars.conf")
+	set:close()
+end
+
+local function hide_builtin(player)
+	local flags = player:hud_get_flags()
+	flags.healthbar = false
+	flags.breathbar = false
+	player:hud_set_flags(flags)
+end
+
+
+local function custom_hud(player)
+	if minetest.setting_getbool("enable_damage") then
+		hb.init_hudbar(player, "health", player:get_hp())
+		local breath = player:get_breath()
+		local hide_breath
+		if breath == 11 then hide_breath = true else hide_breath = false end
+		hb.init_hudbar(player, "breath", math.min(breath, 10), nil, hide_breath)
+	end
+end
+
+
+-- update built-in HUD bars
+local function update_hud(player)
+	if minetest.setting_getbool("enable_damage") then
+		--air
+		local breath = player:get_breath()
+
+		if breath == 11 then
+			hb.hide_hudbar(player, "breath")
+		else
+			hb.unhide_hudbar(player, "breath")
+			hb.change_hudbar(player, "breath", math.min(breath, 10))
+		end
+
+		--health
+		hb.change_hudbar(player, "health", player:get_hp())
+	end
+end
+
+minetest.register_on_joinplayer(function(player)
+	hide_builtin(player)
+	custom_hud(player)
+	hb.players[player:get_player_name()] = player
+end)
+
+minetest.register_on_leaveplayer(function(player)
+	hb.players[player:get_player_name()] = nil
+end)
+
+local main_timer = 0
+local timer = 0
+minetest.register_globalstep(function(dtime)
+	main_timer = main_timer + dtime
+	timer = timer + dtime
+	if main_timer > hb.settings.tick or timer > 4 then
+		if main_timer > hb.settings.tick then main_timer = 0 end
+		for playername, player in pairs(hb.players) do
+			-- only proceed if damage is enabled
+			if minetest.setting_getbool("enable_damage") then
+			-- update all hud elements
+				update_hud(player)
+			end
+		end
+	end
+	if timer > 4 then timer = 0 end
+end)