elepower/elepower_papi/helpers.lua

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-----------------------
-- 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)
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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.start_timer(pos)
local t = minetest.get_node_timer(pos)
if not t:is_started() then
t:start(1.0)
end
end
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function ele.helpers.flatten(map)
local list = {}
for key, value in pairs(map) do
list[#list + 1] = value
end
return list
end
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function ele.helpers.node_compare(pos, name)
local node = minetest.get_node_or_nil(pos)
if not node then return false end
if name:match("^group:") then
return ele.helpers.get_item_group(node.name, name:sub(7))
end
if node.name ~= name then return false end
return true
end
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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
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function ele.helpers.get_first_line(str)
return str:split('\n', false, 1, true)[1]
end
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-- 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
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function ele.helpers.face_front(pos, fd)
local back = minetest.facedir_to_dir(fd)
local front = table.copy(back)
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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
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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
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function ele.helpers.register_liquid(liquid, def)
local mod = minetest.get_current_modname()
for _,state in pairs({"source", "flowing"}) do
local def_base = {
drawtype = "liquid",
paramtype = "light",
walkable = false,
pointable = false,
diggable = false,
buildable_to = true,
is_ground_content = false,
drop = "",
drowning = 1,
liquidtype = state,
liquid_alternative_source = mod..":"..liquid.."_source",
liquid_alternative_flowing = mod..":"..liquid.."_flowing",
sounds = default.node_sound_water_defaults(),
}
for key,val in pairs(def) do
if type(val) == "table" then
def_base[key] = table.copy(val)
else
def_base[key] = val
end
end
if not def_base.groups then
def_base.groups = {liquid = 3}
end
if state == "flowing" then
def_base.description = "Flowing " .. def_base.description
def_base.paramtype2 = "flowingliquid"
def_base.drawtype = "flowingliquid"
def_base.groups.not_in_creative_inventory = 1
else
def_base.description = def_base.description .. " Source"
end
if def["tiles_"..state] then
def_base.tiles = table.copy(def["tiles_"..state])
def_base["tiles_"..state] = nil
end
if def["special_tiles_"..state] then
def_base.special_tiles = table.copy(def["special_tiles_"..state])
def_base["special_tiles_"..state] = nil
end
minetest.register_node(mod..":"..liquid.."_"..state, def_base)
end
end