elepower/elepower_papi/helpers.lua

114 lines
2.2 KiB
Lua

-----------------------
-- Utility Functions --
-----------------------
ele.helpers = {}
function ele.helpers.round(v)
return math.floor(v + 0.5)
end
function ele.helpers.swap_node(pos, noded)
local node = minetest.get_node(pos)
if type(noded) ~= "table" then
local n = table.copy(node)
n.name = noded
noded = n
end
if node.name == noded.name then
return false
end
minetest.swap_node(pos, noded)
return true
end
function ele.helpers.get_or_load_node(pos)
local node = minetest.get_node_or_nil(pos)
if node then return node end
local vm = VoxelManip()
local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
return nil
end
function ele.helpers.get_item_group(name, grp)
return minetest.get_item_group(name, grp) > 0
end
function ele.helpers.flatten(map)
local list = {}
for key, value in pairs(map) do
list[#list + 1] = value
end
return list
end
function ele.helpers.get_node_property(meta, pos, prop)
local value = meta:get_int(prop)
if value == 0 or value == nil then
local nname = minetest.get_node(pos).name
local ndef = minetest.registered_nodes[nname]
value = ndef["ele_"..prop]
end
if not value then return 0 end
return value
end
-- Look for item name regardless of mod
function ele.helpers.scan_item_list(item_name)
local found = nil
for name in pairs(minetest.registered_items) do
local nomod = name:gsub("([%w_]+):", "")
if nomod == item_name then
found = name
break
end
end
return found
end
function ele.helpers.face_front(pos, fd)
local back = minetest.facedir_to_dir(fd)
local front = table.copy(back)
front.x = front.x * -1 + pos.x
front.y = front.y * -1 + pos.y
front.z = front.z * -1 + pos.z
return front
end
function ele.helpers.comma_value(n) -- credit http://richard.warburton.it
local left,num,right = string.match(n,'^([^%d]*%d)(%d*)(.-)$')
return left..(num:reverse():gsub('(%d%d%d)','%1,'):reverse())..right
end
function ele.helpers.state_enabled(meta, pos, state)
if not state then
state = meta:get_int("state")
end
if state == 0 then
return true
elseif state == 1 then
return false
end
if state == 2 and meta:get_int("signal_interrupt") == 1 then
return true
elseif state == 3 and meta:get_int("signal_interrupt") == 0 then
return true
end
return false
end