nalc_game/mods/screwdriver/init.lua
Auke Kok 82299b94dc Verify node type is facedir.
This prevents nodes that are not of the "facedir" paramtype2,
as these are generally not expected to be able to rotate. Mods
and other methods may still manipulate param2 of these nodes
as expected.

Addresses #712
2015-12-25 15:37:17 +00:00

118 lines
3.2 KiB
Lua

screwdriver = {}
local function nextrange(x, max)
x = x + 1
if x > max then
x = 0
end
return x
end
screwdriver.ROTATE_FACE = 1
screwdriver.ROTATE_AXIS = 2
screwdriver.disallow = function(pos, node, user, mode, new_param2)
return false
end
screwdriver.rotate_simple = function(pos, node, user, mode, new_param2)
if mode ~= screwdriver.ROTATE_FACE then
return false
end
end
local USES = 200
-- Handles rotation
local function screwdriver_handler(itemstack, user, pointed_thing, mode)
if pointed_thing.type ~= "node" then
return
end
local pos = pointed_thing.under
if minetest.is_protected(pos, user:get_player_name()) then
minetest.record_protection_violation(pos, user:get_player_name())
return
end
local node = minetest.get_node(pos)
local ndef = minetest.registered_nodes[node.name]
-- verify node is facedir (expected to be rotatable)
if ndef.paramtype2 ~= "facedir" then
return
end
-- Compute param2
local rotationPart = node.param2 % 32 -- get first 4 bits
local preservePart = node.param2 - rotationPart
local axisdir = math.floor(rotationPart / 4)
local rotation = rotationPart - axisdir * 4
if mode == screwdriver.ROTATE_FACE then
rotationPart = axisdir * 4 + nextrange(rotation, 3)
elseif mode == screwdriver.ROTATE_AXIS then
rotationPart = nextrange(axisdir, 5) * 4
end
local new_param2 = preservePart + rotationPart
local should_rotate = true
if ndef and ndef.on_rotate then -- Node provides a handler, so let the handler decide instead if the node can be rotated
-- Copy pos and node because callback can modify it
local result = ndef.on_rotate(vector.new(pos),
{name = node.name, param1 = node.param1, param2 = node.param2},
user, mode, new_param2)
if result == false then -- Disallow rotation
return
elseif result == true then
should_rotate = false
end
else
if not ndef or not ndef.paramtype2 == "facedir" or
(ndef.drawtype == "nodebox" and
not ndef.node_box.type == "fixed") or
node.param2 == nil then
return
end
if ndef.can_dig and not ndef.can_dig(pos, user) then
return
end
end
if should_rotate then
node.param2 = new_param2
minetest.swap_node(pos, node)
end
if not minetest.setting_getbool("creative_mode") then
itemstack:add_wear(65535 / (USES - 1))
end
return itemstack
end
-- Screwdriver
minetest.register_tool("screwdriver:screwdriver", {
description = "Screwdriver (left-click rotates face, right-click rotates axis)",
inventory_image = "screwdriver.png",
on_use = function(itemstack, user, pointed_thing)
screwdriver_handler(itemstack, user, pointed_thing, screwdriver.ROTATE_FACE)
return itemstack
end,
on_place = function(itemstack, user, pointed_thing)
screwdriver_handler(itemstack, user, pointed_thing, screwdriver.ROTATE_AXIS)
return itemstack
end,
})
minetest.register_craft({
output = "screwdriver:screwdriver",
recipe = {
{"default:steel_ingot"},
{"group:stick"}
}
})
minetest.register_alias("screwdriver:screwdriver1", "screwdriver:screwdriver")
minetest.register_alias("screwdriver:screwdriver2", "screwdriver:screwdriver")
minetest.register_alias("screwdriver:screwdriver3", "screwdriver:screwdriver")
minetest.register_alias("screwdriver:screwdriver4", "screwdriver:screwdriver")