mods/screwdriver/init.lua

   1 screwdriver = {}
   2
   3 local function nextrange(x, max)
   4         x = x + 1
   5         if x > max then
   6                 x = 0
   7         end
   8         return x
   9 end
  10
  11 screwdriver.ROTATE_FACE = 1
  12 screwdriver.ROTATE_AXIS = 2
  13 screwdriver.disallow = function(pos, node, user, mode, new_param2)
  14         return false
  15 end
  16 screwdriver.rotate_simple = function(pos, node, user, mode, new_param2)
  17         if mode ~= screwdriver.ROTATE_FACE then
  18                 return false
  19         end
  20 end
  21 local USES = 200
  22
  23 -- Handles rotation
  24 local function screwdriver_handler(itemstack, user, pointed_thing, mode)
  25         if pointed_thing.type ~= "node" then
  26                 return
  27         end
  28
  29         local pos = pointed_thing.under
  30
  31         if minetest.is_protected(pos, user:get_player_name()) then
  32                 minetest.record_protection_violation(pos, user:get_player_name())
  33                 return
  34         end
  35
  36         local node = minetest.get_node(pos)
  37         local ndef = minetest.registered_nodes[node.name]
  38         -- Compute param2
  39         local rotationPart = node.param2 % 32 -- get first 4 bits
  40         local preservePart = node.param2 - rotationPart
  41         local axisdir = math.floor(rotationPart / 4)
  42         local rotation = rotationPart - axisdir * 4
  43         if mode == screwdriver.ROTATE_FACE then
  44                 rotationPart = axisdir * 4 + nextrange(rotation, 3)
  45         elseif mode == screwdriver.ROTATE_AXIS then
  46                 rotationPart = nextrange(axisdir, 5) * 4
  47         end
  48
  49         local new_param2 = preservePart + rotationPart
  50         local should_rotate = true
  51
  52         if ndef and ndef.on_rotate then -- Node provides a handler, so let the handler decide instead if the node can be rotated
  53                 -- Copy pos and node because callback can modify it
  54                 local result = ndef.on_rotate(vector.new(pos),
  55                                 {name = node.name, param1 = node.param1, param2 = node.param2},
  56                                 user, mode, new_param2)
  57                 if result == false then -- Disallow rotation
  58                         return
  59                 elseif result == true then
  60                         should_rotate = false
  61                 end
  62         else
  63                 if not ndef or not ndef.paramtype2 == "facedir" or
  64                                 (ndef.drawtype == "nodebox" and
  65                                 not ndef.node_box.type == "fixed") or
  66                                 node.param2 == nil then
  67                         return
  68                 end
  69
  70                 if ndef.can_dig and not ndef.can_dig(pos, user) then
  71                         return
  72                 end
  73         end
  74
  75         if should_rotate then
  76                 node.param2 = new_param2
  77                 minetest.swap_node(pos, node)
  78         end
  79
  80         if not minetest.setting_getbool("creative_mode") then
  81                 itemstack:add_wear(65535 / (USES - 1))
  82         end
  83
  84         return itemstack
  85 end
  86
  87 -- Screwdriver
  88 minetest.register_tool("screwdriver:screwdriver", {
  89         description = "Screwdriver (left-click rotates face, right-click rotates axis)",
  90         inventory_image = "screwdriver.png",
  91         on_use = function(itemstack, user, pointed_thing)
  92                 screwdriver_handler(itemstack, user, pointed_thing, screwdriver.ROTATE_FACE)
  93                 return itemstack
  94         end,
  95         on_place = function(itemstack, user, pointed_thing)
  96                 screwdriver_handler(itemstack, user, pointed_thing, screwdriver.ROTATE_AXIS)
  97                 return itemstack
  98         end,
  99 })
 100
 101
 102 minetest.register_craft({
 103         output = "screwdriver:screwdriver",
 104         recipe = {
 105                 {"default:steel_ingot"},
 106                 {"group:stick"}
 107         }
 108 })
 109
 110 minetest.register_alias("screwdriver:screwdriver1", "screwdriver:screwdriver")
 111 minetest.register_alias("screwdriver:screwdriver2", "screwdriver:screwdriver")
 112 minetest.register_alias("screwdriver:screwdriver3", "screwdriver:screwdriver")
 113 minetest.register_alias("screwdriver:screwdriver4", "screwdriver:screwdriver")