Add screwdriver

mods/ITEMS/screwdriver/README.txt

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+Minetest Game mod: screwdriver
+==============================
+See license.txt for license information.
+
+License of source code
+----------------------
+Originally by RealBadAngel, Maciej Kasatkin (LGPL 2.1)
+Various Minetest developers and contributors (LGPL 2.1)
+
+License of media (textures)
+---------------------------
+Created by Gambit (CC BY-SA 3.0):
+  screwdriver.png

mods/ITEMS/screwdriver/init.lua

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+screwdriver = {}
+
+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
+
+-- For attached wallmounted nodes: returns true if rotation is valid
+-- simplified version of minetest:builtin/game/falling.lua#L148.
+local function check_attached_node(pos, rotation)
+	local d = minetest.wallmounted_to_dir(rotation)
+	local p2 = vector.add(pos, d)
+	local n = minetest.get_node(p2).name
+	local def2 = minetest.registered_nodes[n]
+	if def2 and not def2.walkable then
+		return false
+	end
+	return true
+end
+
+screwdriver.rotate = {}
+
+local facedir_tbl = {
+	[screwdriver.ROTATE_FACE] = {
+		[0] = 1, [1] = 2, [2] = 3, [3] = 0,
+		[4] = 5, [5] = 6, [6] = 7, [7] = 4,
+		[8] = 9, [9] = 10, [10] = 11, [11] = 8,
+		[12] = 13, [13] = 14, [14] = 15, [15] = 12,
+		[16] = 17, [17] = 18, [18] = 19, [19] = 16,
+		[20] = 21, [21] = 22, [22] = 23, [23] = 20,
+	},
+	[screwdriver.ROTATE_AXIS] = {
+		[0] = 4, [1] = 4, [2] = 4, [3] = 4,
+		[4] = 8, [5] = 8, [6] = 8, [7] = 8,
+		[8] = 12, [9] = 12, [10] = 12, [11] = 12,
+		[12] = 16, [13] = 16, [14] = 16, [15] = 16,
+		[16] = 20, [17] = 20, [18] = 20, [19] = 20,
+		[20] = 0, [21] = 0, [22] = 0, [23] = 0,
+	},
+}
+
+screwdriver.rotate.facedir = function(pos, node, mode)
+	local rotation = node.param2 % 32 -- get first 5 bits
+	local other = node.param2 - rotation
+	rotation = facedir_tbl[mode][rotation] or 0
+	return rotation + other
+end
+
+screwdriver.rotate.colorfacedir = screwdriver.rotate.facedir
+
+local wallmounted_tbl = {
+	[screwdriver.ROTATE_FACE] = {[2] = 5, [3] = 4, [4] = 2, [5] = 3, [1] = 0, [0] = 1},
+	[screwdriver.ROTATE_AXIS] = {[2] = 5, [3] = 4, [4] = 2, [5] = 1, [1] = 0, [0] = 3}
+}
+
+screwdriver.rotate.wallmounted = function(pos, node, mode)
+	local rotation = node.param2 % 8 -- get first 3 bits
+	local other = node.param2 - rotation
+	rotation = wallmounted_tbl[mode][rotation] or 0
+	if minetest.get_item_group(node.name, "attached_node") ~= 0 then
+		-- find an acceptable orientation
+		for i = 1, 5 do
+			if not check_attached_node(pos, rotation) then
+				rotation = wallmounted_tbl[mode][rotation] or 0
+			else
+				break
+			end
+		end
+	end
+	return rotation + other
+end
+
+screwdriver.rotate.colorwallmounted = screwdriver.rotate.wallmounted
+
+-- Handles rotation
+screwdriver.handler = function(itemstack, user, pointed_thing, mode, uses)
+	if pointed_thing.type ~= "node" then
+		return
+	end
+
+	local pos = pointed_thing.under
+	local player_name = user and user:get_player_name() or ""
+
+	if minetest.is_protected(pos, player_name) then
+		minetest.record_protection_violation(pos, player_name)
+		return
+	end
+
+	local node = minetest.get_node(pos)
+	local ndef = minetest.registered_nodes[node.name]
+	if not ndef then
+		return itemstack
+	end
+	-- can we rotate this paramtype2?
+	local fn = screwdriver.rotate[ndef.paramtype2]
+	if not fn and not ndef.on_rotate then
+		return itemstack
+	end
+
+	local should_rotate = true
+	local new_param2
+	if fn then
+		new_param2 = fn(pos, node, mode)
+	else
+		new_param2 = node.param2
+	end
+
+	-- Node provides a handler, so let the handler decide instead if the node can be rotated
+	if ndef.on_rotate then
+		-- 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 itemstack
+		elseif result == true then
+			should_rotate = false
+		end
+	elseif ndef.on_rotate == false then
+		return itemstack
+	elseif ndef.can_dig and not ndef.can_dig(pos, user) then
+		return itemstack
+	end
+
+	if should_rotate and new_param2 ~= node.param2 then
+		node.param2 = new_param2
+		minetest.swap_node(pos, node)
+		minetest.check_for_falling(pos)
+	end
+
+	if not (minetest.settings:get_bool("creative_mode")) then
+		itemstack:add_wear(65535 / ((uses or 200) - 1))
+	end
+
+	return itemstack
+end
+
+-- Screwdriver
+minetest.register_tool("screwdriver:screwdriver", {
+	description = "Screwdriver",
+	inventory_image = "screwdriver.png",
+	on_use = function(itemstack, user, pointed_thing)
+		screwdriver.handler(itemstack, user, pointed_thing, screwdriver.ROTATE_FACE, 200)
+		return itemstack
+	end,
+	on_place = function(itemstack, user, pointed_thing)
+		screwdriver.handler(itemstack, user, pointed_thing, screwdriver.ROTATE_AXIS, 200)
+		return itemstack
+	end,
+})
+
+
+minetest.register_craft({
+	output = "screwdriver:screwdriver",
+	recipe = {
+		{"mcl_core:iron_ingot"},
+		{"mcl_core: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")

mods/ITEMS/screwdriver/license.txt

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+License of source code
+----------------------
+
+GNU Lesser General Public License, version 2.1
+Copyright (C) 2013-2016 RealBadAngel, Maciej Kasatkin
+Copyright (C) 2013-2016 Various Minetest developers and contributors
+
+This program is free software; you can redistribute it and/or modify it under the terms
+of the GNU Lesser General Public License as published by the Free Software Foundation;
+either version 2.1 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+See the GNU Lesser General Public License for more details:
+https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
+
+
+Licenses of media (textures)
+----------------------------
+
+Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
+Copyright (C) 2013-2016 Gambit
+
+You are free to:
+Share — copy and redistribute the material in any medium or format.
+Adapt — remix, transform, and build upon the material for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license, and
+indicate if changes were made. You may do so in any reasonable manner, but not in any way
+that suggests the licensor endorses you or your use.
+
+ShareAlike — If you remix, transform, or build upon the material, you must distribute
+your contributions under the same license as the original.
+
+No additional restrictions — You may not apply legal terms or technological measures that
+legally restrict others from doing anything the license permits.
+
+Notices:
+
+You do not have to comply with the license for elements of the material in the public
+domain or where your use is permitted by an applicable exception or limitation.
+No warranties are given. The license may not give you all of the permissions necessary
+for your intended use. For example, other rights such as publicity, privacy, or moral
+rights may limit how you use the material.
+
+For more details:
+http://creativecommons.org/licenses/by-sa/3.0/