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https://github.com/minetest/minetest.git
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242 lines
5.6 KiB
Lua
242 lines
5.6 KiB
Lua
-- Minetest: builtin/misc.lua
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--
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-- Misc. API functions
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--
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local jobs = {}
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local time = 0.0
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local last = core.get_us_time() / 1000000
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core.register_globalstep(function(dtime)
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local new = core.get_us_time() / 1000000
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if new > last then
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time = time + (new - last)
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else
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-- Overflow, we may lose a little bit of time here but
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-- only 1 tick max, potentially running timers slightly
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-- too early.
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time = time + new
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end
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last = new
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if #jobs < 1 then
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return
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end
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-- Iterate backwards so that we miss any new timers added by
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-- a timer callback, and so that we don't skip the next timer
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-- in the list if we remove one.
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for i = #jobs, 1, -1 do
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local job = jobs[i]
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if time >= job.expire then
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core.set_last_run_mod(job.mod_origin)
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job.func(unpack(job.arg))
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table.remove(jobs, i)
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end
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end
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end)
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function core.after(after, func, ...)
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assert(tonumber(after) and type(func) == "function",
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"Invalid core.after invocation")
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jobs[#jobs + 1] = {
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func = func,
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expire = time + after,
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arg = {...},
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mod_origin = core.get_last_run_mod()
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}
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end
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function core.check_player_privs(name, ...)
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local arg_type = type(name)
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if (arg_type == "userdata" or arg_type == "table") and
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name.get_player_name then -- If it quacks like a Player...
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name = name:get_player_name()
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elseif arg_type ~= "string" then
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error("Invalid core.check_player_privs argument type: " .. arg_type, 2)
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end
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local requested_privs = {...}
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local player_privs = core.get_player_privs(name)
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local missing_privileges = {}
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if type(requested_privs[1]) == "table" then
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-- We were provided with a table like { privA = true, privB = true }.
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for priv, value in pairs(requested_privs[1]) do
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if value and not player_privs[priv] then
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missing_privileges[#missing_privileges + 1] = priv
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end
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end
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else
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-- Only a list, we can process it directly.
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for key, priv in pairs(requested_privs) do
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if not player_privs[priv] then
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missing_privileges[#missing_privileges + 1] = priv
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end
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end
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end
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if #missing_privileges > 0 then
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return false, missing_privileges
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end
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return true, ""
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end
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local player_list = {}
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core.register_on_joinplayer(function(player)
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local player_name = player:get_player_name()
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player_list[player_name] = player
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core.chat_send_all("*** " .. player_name .. " joined the game.")
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end)
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core.register_on_leaveplayer(function(player, timed_out)
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local player_name = player:get_player_name()
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player_list[player_name] = nil
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local announcement = "*** " .. player_name .. " left the game."
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if timed_out then
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announcement = announcement .. " (timed out)"
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end
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core.chat_send_all(announcement)
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end)
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function core.get_connected_players()
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local temp_table = {}
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for index, value in pairs(player_list) do
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if value:is_player_connected() then
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temp_table[#temp_table + 1] = value
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end
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end
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return temp_table
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end
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-- Returns two position vectors representing a box of `radius` in each
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-- direction centered around the player corresponding to `player_name`
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function core.get_player_radius_area(player_name, radius)
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local player = core.get_player_by_name(player_name)
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if player == nil then
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return nil
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end
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local p1 = player:getpos()
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local p2 = p1
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if radius then
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p1 = vector.subtract(p1, radius)
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p2 = vector.add(p2, radius)
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end
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return p1, p2
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end
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function core.hash_node_position(pos)
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return (pos.z+32768)*65536*65536 + (pos.y+32768)*65536 + pos.x+32768
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end
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function core.get_position_from_hash(hash)
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local pos = {}
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pos.x = (hash%65536) - 32768
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hash = math.floor(hash/65536)
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pos.y = (hash%65536) - 32768
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hash = math.floor(hash/65536)
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pos.z = (hash%65536) - 32768
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return pos
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end
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function core.get_item_group(name, group)
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if not core.registered_items[name] or not
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core.registered_items[name].groups[group] then
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return 0
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end
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return core.registered_items[name].groups[group]
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end
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function core.get_node_group(name, group)
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core.log("deprecated", "Deprecated usage of get_node_group, use get_item_group instead")
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return core.get_item_group(name, group)
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end
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function core.setting_get_pos(name)
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local value = core.setting_get(name)
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if not value then
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return nil
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end
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return core.string_to_pos(value)
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end
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-- To be overriden by protection mods
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function core.is_protected(pos, name)
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return false
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end
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function core.record_protection_violation(pos, name)
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for _, func in pairs(core.registered_on_protection_violation) do
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func(pos, name)
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end
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end
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local raillike_ids = {}
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local raillike_cur_id = 0
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function core.raillike_group(name)
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local id = raillike_ids[name]
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if not id then
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raillike_cur_id = raillike_cur_id + 1
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raillike_ids[name] = raillike_cur_id
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id = raillike_cur_id
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end
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return id
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end
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-- HTTP callback interface
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function core.http_add_fetch(httpenv)
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httpenv.fetch = function(req, callback)
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local handle = httpenv.fetch_async(req)
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local function update_http_status()
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local res = httpenv.fetch_async_get(handle)
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if res.completed then
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callback(res)
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else
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core.after(0, update_http_status)
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end
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end
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core.after(0, update_http_status)
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end
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return httpenv
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end
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if minetest.setting_getbool("disable_escape_sequences") then
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function core.get_color_escape_sequence(color)
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return ""
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end
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function core.get_background_escape_sequence(color)
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return ""
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end
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function core.colorize(color, message)
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return message
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end
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else
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local ESCAPE_CHAR = string.char(0x1b)
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function core.get_color_escape_sequence(color)
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return ESCAPE_CHAR .. "(c@" .. color .. ")"
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end
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function core.get_background_escape_sequence(color)
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return ESCAPE_CHAR .. "(b@" .. color .. ")"
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end
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function core.colorize(color, message)
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return core.get_color_escape_sequence(color) .. message .. core.get_color_escape_sequence("#ffffff")
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end
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end
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