minetest/builtin/game/misc.lua

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-- Minetest: builtin/misc.lua
--
-- Misc. API functions
--
local timers = {}
local mintime
local function update_timers(delay)
mintime = false
local sub = 0
for index = 1, #timers do
index = index - sub
local timer = timers[index]
timer.time = timer.time - delay
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if timer.time <= 0 then
timer.func(unpack(timer.args or {}))
table.remove(timers, index)
sub = sub + 1
elseif mintime then
mintime = math.min(mintime, timer.time)
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else
mintime = timer.time
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end
end
end
local timers_to_add
local function add_timers()
for _, timer in ipairs(timers_to_add) do
table.insert(timers, timer)
end
timers_to_add = false
end
local delay = 0
core.register_globalstep(function(dtime)
if not mintime then
-- abort if no timers are running
return
end
if timers_to_add then
add_timers()
end
delay = delay + dtime
if delay < mintime then
return
end
update_timers(delay)
delay = 0
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end)
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function core.after(time, func, ...)
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assert(tonumber(time) and type(func) == "function",
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"Invalid core.after invocation")
if not mintime then
mintime = time
timers_to_add = {{time=time+delay, func=func, args={...}}}
return
end
mintime = math.min(mintime, time)
timers_to_add = timers_to_add or {}
timers_to_add[#timers_to_add+1] = {time=time+delay, func=func, args={...}}
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end
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function core.check_player_privs(name, privs)
local player_privs = core.get_player_privs(name)
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local missing_privileges = {}
for priv, val in pairs(privs) do
if val
and not player_privs[priv] then
table.insert(missing_privileges, priv)
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end
end
if #missing_privileges > 0 then
return false, missing_privileges
end
return true, ""
end
local player_list = {}
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core.register_on_joinplayer(function(player)
player_list[player:get_player_name()] = player
end)
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core.register_on_leaveplayer(function(player)
player_list[player:get_player_name()] = nil
end)
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function core.get_connected_players()
local temp_table = {}
for index, value in pairs(player_list) do
if value:is_player_connected() then
table.insert(temp_table, value)
end
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end
return temp_table
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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
end
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function core.get_position_from_hash(hash)
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local pos = {}
pos.x = (hash%65536) - 32768
hash = math.floor(hash/65536)
pos.y = (hash%65536) - 32768
hash = math.floor(hash/65536)
pos.z = (hash%65536) - 32768
return pos
end
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function core.get_item_group(name, group)
if not core.registered_items[name] or not
core.registered_items[name].groups[group] then
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return 0
end
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return core.registered_items[name].groups[group]
end
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function core.get_node_group(name, group)
core.log("deprecated", "Deprecated usage of get_node_group, use get_item_group instead")
return core.get_item_group(name, group)
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end
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function core.setting_get_pos(name)
local value = core.setting_get(name)
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if not value then
return nil
end
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return core.string_to_pos(value)
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end
-- To be overriden by protection mods
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function core.is_protected(pos, name)
return false
end
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function core.record_protection_violation(pos, name)
for _, func in pairs(core.registered_on_protection_violation) do
func(pos, name)
end
end
local raillike_ids = {}
local raillike_cur_id = 0
function core.raillike_group(name)
local id = raillike_ids[name]
if not id then
raillike_cur_id = raillike_cur_id + 1
raillike_ids[name] = raillike_cur_id
id = raillike_cur_id
end
return id
end