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
  22 -- Handles rotation
  23 screwdriver.handler = function(itemstack, user, pointed_thing, mode, uses)
  24         if pointed_thing.type ~= "node" then
  25                 return
  26         end
  27
  28         local pos = pointed_thing.under
  29
  30         if minetest.is_protected(pos, user:get_player_name()) then
  31                 minetest.record_protection_violation(pos, user:get_player_name())
  32                 return
  33         end
  34
  35         local node = minetest.get_node(pos)
  36         local ndef = minetest.registered_nodes[node.name]
  37         -- verify node is facedir (expected to be rotatable)
  38         if not ndef or ndef.paramtype2 ~= "facedir" then
  39                 return
  40         end
  41         -- Compute param2
  42         local rotationPart = node.param2 % 32 -- get first 4 bits
  43         local preservePart = node.param2 - rotationPart
  44         local axisdir = math.floor(rotationPart / 4)
  45         local rotation = rotationPart - axisdir * 4
  46         if mode == screwdriver.ROTATE_FACE then
  47                 rotationPart = axisdir * 4 + nextrange(rotation, 3)
  48         elseif mode == screwdriver.ROTATE_AXIS then
  49                 rotationPart = nextrange(axisdir, 5) * 4
  50         end
  51
  52         local new_param2 = preservePart + rotationPart
  53         local should_rotate = true
  54
  55         -- Node provides a handler, so let the handler decide instead if the node can be rotated
  56         if ndef and ndef.on_rotate then
  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.on_rotate == false or
  69                                 (ndef.drawtype == "nodebox" and
  70                                 (ndef.node_box and ndef.node_box.type ~= "fixed")) or
  71                                 node.param2 == nil then
  72                         return
  73                 end
  74
  75                 if ndef.can_dig and not ndef.can_dig(pos, user) then
  76                         return
  77                 end
  78         end
  79
  80         if should_rotate then
  81                 node.param2 = new_param2
  82                 minetest.swap_node(pos, node)
  83         end
  84
  85         if not minetest.setting_getbool("creative_mode") then
  86                 itemstack:add_wear(65535 / ((uses or 200) - 1))
  87         end
  88
  89         return itemstack
  90 end
  91
  92 -- Screwdriver
  93 minetest.register_tool("screwdriver:screwdriver", {
  94         description = "Screwdriver (left-click rotates face, right-click rotates axis)",
  95         inventory_image = "screwdriver.png",
  96         on_use = function(itemstack, user, pointed_thing)
  97                 screwdriver.handler(itemstack, user, pointed_thing, screwdriver.ROTATE_FACE, 200)
  98                 return itemstack
  99         end,
 100         on_place = function(itemstack, user, pointed_thing)
 101                 screwdriver.handler(itemstack, user, pointed_thing, screwdriver.ROTATE_AXIS, 200)
 102                 return itemstack
 103         end,
 104 })
 105
 106
 107 minetest.register_craft({
 108         output = "screwdriver:screwdriver",
 109         recipe = {
 110                 {"default:steel_ingot"},
 111                 {"group:stick"}
 112         }
 113 })
 114
 115 minetest.register_alias("screwdriver:screwdriver1", "screwdriver:screwdriver")
 116 minetest.register_alias("screwdriver:screwdriver2", "screwdriver:screwdriver")
 117 minetest.register_alias("screwdriver:screwdriver3", "screwdriver:screwdriver")
 118 minetest.register_alias("screwdriver:screwdriver4", "screwdriver:screwdriver")