VoxeLibre/mods/HUD/mcl_experience/init.lua

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mcl_experience = {
on_add_xp = {},
}
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local modpath = minetest.get_modpath(minetest.get_current_modname())
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dofile(modpath .. "/command.lua")
dofile(modpath .. "/orb.lua")
dofile(modpath .. "/bottle.lua")
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-- local storage
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local hud_bars = {}
local hud_levels = {}
local caches = {}
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-- helpers
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local function xp_to_level(xp)
local xp = xp or 0
local a, b, c, D
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if xp > 1507 then
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a, b, c = 4.5, -162.5, 2220 - xp
elseif xp > 352 then
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a, b, c = 2.5, -40.5, 360 - xp
else
a, b, c = 1, 6, -xp
end
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D = b * b - 4 * a * c
if D == 0 then
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return math.floor(-b / 2 / a)
elseif D > 0 then
local v1, v2 = -b / 2 / a, math.sqrt(D) / 2 / a
return math.floor(math.max(v1 - v2, v1 + v2))
end
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return 0
end
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local function level_to_xp(level)
if level >= 1 and level <= 16 then
return math.floor(math.pow(level, 2) + 6 * level)
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elseif level >= 17 and level <= 31 then
return math.floor(2.5 * math.pow(level, 2) - 40.5 * level + 360)
elseif level >= 32 then
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return math.floor(4.5 * math.pow(level, 2) - 162.5 * level + 2220)
end
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return 0
end
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local function calculate_bounds(level)
return level_to_xp(level), level_to_xp(level + 1)
end
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local function xp_to_bar(xp, level)
local xp_min, xp_max = calculate_bounds(level)
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return (xp - xp_min) / (xp_max - xp_min)
end
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local function bar_to_xp(bar, level)
local xp_min, xp_max = calculate_bounds(level)
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return xp_min + bar * (xp_max - xp_min)
end
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local function get_time()
return minetest.get_us_time() / 1000000
end
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-- api
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function mcl_experience.get_level(player)
return caches[player].level
end
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function mcl_experience.set_level(player, level)
local cache = caches[player]
if level ~= cache.level then
mcl_experience.set_xp(player, math.floor(bar_to_xp(xp_to_bar(mcl_experience.get_xp(player), cache.level), level)))
end
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end
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function mcl_experience.get_xp(player)
return player:get_meta():get_int("xp")
end
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function mcl_experience.set_xp(player, xp)
player:get_meta():set_int("xp", xp)
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mcl_experience.update(player)
end
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function mcl_experience.add_xp(player, xp)
for _, cb in ipairs(mcl_experience.on_add_xp) do
xp = cb.func(player, xp) or xp
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if xp == 0 then
break
end
end
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local cache = caches[player]
local old_level = cache.level
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mcl_experience.set_xp(player, mcl_experience.get_xp(player) + xp)
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local current_time = get_time()
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if current_time - cache.last_time > 0.01 then
local name = player:get_player_name()
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if old_level == cache.level then
minetest.sound_play("mcl_experience", {
to_player = name,
gain = 0.1,
pitch = math.random(75, 99) / 100,
})
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cache.last_time = current_time
else
minetest.sound_play("mcl_experience_level_up", {
to_player = name,
gain = 0.2,
})
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cache.last_time = current_time + 0.2
end
end
end
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function mcl_experience.throw_xp(pos, total_xp)
local i, j = 0, 0
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while i < total_xp and j < 100 do
local xp = math.min(math.random(1, math.min(32767, total_xp - math.floor(i / 2))), total_xp - i)
local obj = minetest.add_entity(pos, "mcl_experience:orb", tostring(xp))
if not obj then
return false
end
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obj:set_velocity(vector.new(
math.random(-2, 2) * math.random(),
math.random( 2, 5),
math.random(-2, 2) * math.random()
))
i = i + xp
j = j + 1
end
end
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function mcl_experience.update(player)
local xp = mcl_experience.get_xp(player)
local cache = caches[player]
cache.level = xp_to_level(xp)
if not minetest.is_creative_enabled(player:get_player_name()) then
player:hud_change(hud_bars[player], "text", "mcl_experience_bar_background.png^[lowpart:"
.. math.floor(math.floor(xp_to_bar(xp, cache.level) * 18) / 18 * 100)
.. ":mcl_experience_bar.png^[transformR270"
)
if cache.level == 0 then
player:hud_change(hud_levels[player], "text", "")
else
player:hud_change(hud_levels[player], "text", tostring(cache.level))
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end
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end
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end
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function mcl_experience.register_on_add_xp(func, priority)
table.insert(mcl_experience.on_add_xp, {func = func, priority = priority or 0})
end
-- callbacks
minetest.register_on_joinplayer(function(player)
caches[player] = {
last_time = get_time(),
}
if not minetest.is_creative_enabled(player:get_player_name()) then
hud_bars[player] = player:hud_add({
hud_elem_type = "image",
position = {x = 0.5, y = 1},
offset = {x = (-9 * 28) - 3, y = -(48 + 24 + 16 - 5)},
scale = {x = 2.8, y = 3.0},
alignment = {x = 1, y = 1},
z_index = 11,
})
hud_levels[player] = player:hud_add({
hud_elem_type = "text",
position = {x = 0.5, y = 1},
number = 0x80FF20,
offset = {x = 0, y = -(48 + 24 + 24)},
z_index = 12,
})
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end
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mcl_experience.update(player)
end)
minetest.register_on_leaveplayer(function(player)
hud_bars[player] = nil
hud_levels[player] = nil
caches[player] = nil
end)
minetest.register_on_dieplayer(function(player)
if not minetest.settings:get_bool("mcl_keepInventory", false) then
mcl_experience.throw_xp(player:get_pos(), mcl_experience.get_xp(player))
mcl_experience.set_xp(player, 0)
end
end)
minetest.register_on_mods_loaded(function()
table.sort(mcl_experience.on_add_xp, function(a, b) return a.priority < b.priority end)
end)