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         -- verify node is facedir (expected to be rotatable)
  39         if ndef.paramtype2 ~= "facedir" then
  40                 return
  41         end
  42         -- Compute param2
  43         local rotationPart = node.param2 % 32 -- get first 4 bits
  44         local preservePart = node.param2 - rotationPart
  45         local axisdir = math.floor(rotationPart / 4)
  46         local rotation = rotationPart - axisdir * 4
  47         if mode == screwdriver.ROTATE_FACE then
  48                 rotationPart = axisdir * 4 + nextrange(rotation, 3)
  49         elseif mode == screwdriver.ROTATE_AXIS then
  50                 rotationPart = nextrange(axisdir, 5) * 4
  51         end
  52
  53         local new_param2 = preservePart + rotationPart
  54         local should_rotate = true
  55
  56         if ndef and ndef.on_rotate then -- Node provides a handler, so let the handler decide instead if the node can be rotated
  57                 -- Copy pos and node because callback can modify it
  58                 local result = ndef.on_rotate(vector.new(pos),
  59                                 {name = node.name, param1 = node.param1, param2 = node.param2},
  60                                 user, mode, new_param2)
  61                 if result == false then -- Disallow rotation
  62                         return
  63                 elseif result == true then
  64                         should_rotate = false
  65                 end
  66         else
  67                 if not ndef or not ndef.paramtype2 == "facedir" or
  68                                 (ndef.drawtype == "nodebox" and
  69                                 not ndef.node_box.type == "fixed") or
  70                                 node.param2 == nil then
  71                         return
  72                 end
  73
  74                 if ndef.can_dig and not ndef.can_dig(pos, user) then
  75                         return
  76                 end
  77         end
  78
  79         if should_rotate then
  80                 node.param2 = new_param2
  81                 minetest.swap_node(pos, node)
  82         end
  83
  84         if not minetest.setting_getbool("creative_mode") then
  85                 itemstack:add_wear(65535 / (USES - 1))
  86         end
  87
  88         return itemstack
  89 end
  90
  91 -- Screwdriver
  92 minetest.register_tool("screwdriver:screwdriver", {
  93         description = "Screwdriver (left-click rotates face, right-click rotates axis)",
  94         inventory_image = "screwdriver.png",
  95         on_use = function(itemstack, user, pointed_thing)
  96                 screwdriver_handler(itemstack, user, pointed_thing, screwdriver.ROTATE_FACE)
  97                 return itemstack
  98         end,
  99         on_place = function(itemstack, user, pointed_thing)
 100                 screwdriver_handler(itemstack, user, pointed_thing, screwdriver.ROTATE_AXIS)
 101                 return itemstack
 102         end,
 103 })
 104
 105
 106 minetest.register_craft({
 107         output = "screwdriver:screwdriver",
 108         recipe = {
 109                 {"default:steel_ingot"},
 110                 {"group:stick"}
 111         }
 112 })
 113
 114 minetest.register_alias("screwdriver:screwdriver1", "screwdriver:screwdriver")
 115 minetest.register_alias("screwdriver:screwdriver2", "screwdriver:screwdriver")
 116 minetest.register_alias("screwdriver:screwdriver3", "screwdriver:screwdriver")
 117 minetest.register_alias("screwdriver:screwdriver4", "screwdriver:screwdriver")