minetest_hudbars/init.lua

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hb = {}
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hb.hudtables = {}
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-- number of registered HUD bars
hb.hudbars_count = 0
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-- default settings
HUD_BARLENGTH = 160
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-- statbar positions
HUD_START_OFFSET_LEFT = { x = -175, y = -70 }
HUD_START_OFFSET_RIGHT = { x = 15, y = -70 }
HUD_POS_LEFT = { x=0.5, y=1 }
HUD_POS_RIGHT = { x = 0.5, y = 1 }
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HUD_VMARGIN = 24
HUD_TICK = 0.1
function hb.value_to_barlength(value, max)
if max == 0 then
return 0
else
return math.ceil((value/max) * HUD_BARLENGTH)
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, start_hidden, format_string)
local hudtable = {}
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local pos, offset
if hb.hudbars_count % 2 == 0 then
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pos = HUD_POS_LEFT
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offset = {
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x = HUD_START_OFFSET_LEFT.x,
y = HUD_START_OFFSET_LEFT.y - HUD_VMARGIN * math.floor(hb.hudbars_count/2)
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}
else
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pos = HUD_POS_RIGHT
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offset = {
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x = HUD_START_OFFSET_RIGHT.x,
y = HUD_START_OFFSET_RIGHT.y - HUD_VMARGIN * math.floor((hb.hudbars_count-1)/2)
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}
end
if format_string == nil then
format_string = "%s: %d/%d"
end
hudtable.add_all = function(player, start_value, start_max)
if start_value == nil then start_value = default_start_value end
if start_max == nil then start_max = default_start_max end
local ids = {}
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local state = {}
local name = player:get_player_name()
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local bgscale
if start_max == 0 then
bgscale = { x=0, y=0 }
else
bgscale = { x=1, y=1 }
end
ids.bg = player:hud_add({
hud_elem_type = "image",
position = pos,
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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 = { x = 1, y = 1 },
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 = hb.value_to_barlength(start_value, start_max),
alignment = {x=-1,y=-1},
offset = offset,
})
local text = string.format(format_string, label, start_value, start_max)
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 },
})
state.hidden = start_hidden
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state.value = start_value
state.max = start_max
state.text = text
state.barlength = hb.value_to_barlength(start_value, start_max)
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 = {}
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hudtable.hudstate = {}
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hb.hudbars_count= hb.hudbars_count + 1
hb.hudtables[identifier] = hudtable
end
function hb.init_hudbar(player, identifier, start_value, start_max)
hb.hudtables[identifier].add_all(player, start_value, start_max)
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
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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
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end
end
function hb.hide_hudbar(player, identifier)
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local name = player:get_player_name()
local hudtable = hb.get_hudtable(identifier)
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if(hudtable.hudstate[name].hidden == false) then
player:hud_change(hudtable.hudids[name].icon, "scale", {x=0,y=0})
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)
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local name = player:get_player_name()
local hudtable = hb.get_hudtable(identifier)
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if(hudtable.hudstate[name].hidden) then
local name = player:get_player_name()
local value = hudtable.hudstate[name].value
local max = hudtable.hudstate[name].max
player:hud_change(hudtable.hudids[name].icon, "scale", {x=1,y=1})
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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))
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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
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--register built-in HUD bars
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)
--load custom settings
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local set = io.open(minetest.get_modpath("hudbars").."/hudbars.conf", "r")
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if set then
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dofile(minetest.get_modpath("hudbars").."/hudbars.conf")
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set:close()
end
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local function hide_builtin(player)
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player:hud_set_flags({crosshair = true, hotbar = true, healthbar = false, wielditem = true, breathbar = false})
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end
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local function custom_hud(player)
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if minetest.setting_getbool("enable_damage") then
hb.init_hudbar(player, "health", player:get_hp())
hb.init_hudbar(player, "breath", player:get_breath())
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end
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end
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-- update built-in HUD bars
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local function update_hud(player)
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--air
local air = player:get_breath()
if air == 11 then
hb.hide_hudbar(player, "breath")
else
hb.unhide_hudbar(player, "breath")
hb.change_hudbar(player, "breath", air)
end
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--health
hb.change_hudbar(player, "health", player:get_hp())
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end
minetest.register_on_joinplayer(function(player)
minetest.after(0.5, function()
hide_builtin(player)
custom_hud(player)
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end)
end)
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local main_timer = 0
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local timer = 0
local timer2 = 0
minetest.after(2.5, function()
minetest.register_globalstep(function(dtime)
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main_timer = main_timer + dtime
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timer = timer + dtime
timer2 = timer2 + dtime
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if main_timer > HUD_TICK or timer > 4 then
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if main_timer > HUD_TICK then main_timer = 0 end
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for _,player in ipairs(minetest.get_connected_players()) do
-- only proceed if damage is enabled
if minetest.setting_getbool("enable_damage") then
-- update all hud elements
update_hud(player)
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end
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end
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end
if timer > 4 then timer = 0 end
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end)
end)