mods/screwdriver/init.lua

   1 screwdriver = {}
   2
   3 screwdriver.ROTATE_FACE = 1
   4 screwdriver.ROTATE_AXIS = 2
   5 screwdriver.disallow = function(pos, node, user, mode, new_param2)
   6         return false
   7 end
   8 screwdriver.rotate_simple = function(pos, node, user, mode, new_param2)
   9         if mode ~= screwdriver.ROTATE_FACE then
  10                 return false
  11         end
  12 end
  13
  14 -- For attached wallmounted nodes: returns true if rotation is valid
  15 -- simplified version of minetest:builtin/game/falling.lua#L148.
  16 local function check_attached_node(pos, rotation)
  17         local d = minetest.wallmounted_to_dir(rotation)
  18         local p2 = vector.add(pos, d)
  19         local n = minetest.get_node(p2).name
  20         local def2 = minetest.registered_nodes[n]
  21         if def2 and not def2.walkable then
  22                 return false
  23         end
  24         return true
  25 end
  26
  27 screwdriver.rotate = {}
  28
  29 local facedir_tbl = {
  30         [screwdriver.ROTATE_FACE] = {
  31                 [0] = 1, [1] = 2, [2] = 3, [3] = 0,
  32                 [4] = 5, [5] = 6, [6] = 7, [7] = 4,
  33                 [8] = 9, [9] = 10, [10] = 11, [11] = 8,
  34                 [12] = 13, [13] = 14, [14] = 15, [15] = 12,
  35                 [16] = 17, [17] = 18, [18] = 19, [19] = 16,
  36                 [20] = 21, [21] = 22, [22] = 23, [23] = 20,
  37         },
  38         [screwdriver.ROTATE_AXIS] = {
  39                 [0] = 4, [1] = 4, [2] = 4, [3] = 4,
  40                 [4] = 8, [5] = 8, [6] = 8, [7] = 8,
  41                 [8] = 12, [9] = 12, [10] = 12, [11] = 12,
  42                 [12] = 16, [13] = 16, [14] = 16, [15] = 16,
  43                 [16] = 20, [17] = 20, [18] = 20, [19] = 20,
  44                 [20] = 0, [21] = 0, [22] = 0, [23] = 0,
  45         },
  46 }
  47
  48 screwdriver.rotate.facedir = function(pos, node, mode)
  49         local rotation = node.param2 % 32 -- get first 5 bits
  50         local other = node.param2 - rotation
  51         rotation = facedir_tbl[mode][rotation] or 0
  52         return rotation + other
  53 end
  54
  55 screwdriver.rotate.colorfacedir = screwdriver.rotate.facedir
  56
  57 local wallmounted_tbl = {
  58         [screwdriver.ROTATE_FACE] = {[2] = 5, [3] = 4, [4] = 2, [5] = 3, [1] = 0, [0] = 1},
  59         [screwdriver.ROTATE_AXIS] = {[2] = 5, [3] = 4, [4] = 2, [5] = 1, [1] = 0, [0] = 3}
  60 }
  61
  62 screwdriver.rotate.wallmounted = function(pos, node, mode)
  63         local rotation = node.param2 % 8 -- get first 3 bits
  64         local other = node.param2 - rotation
  65         rotation = wallmounted_tbl[mode][rotation] or 0
  66         if minetest.get_item_group(node.name, "attached_node") ~= 0 then
  67                 -- find an acceptable orientation
  68                 for i = 1, 5 do
  69                         if not check_attached_node(pos, rotation) then
  70                                 rotation = wallmounted_tbl[mode][rotation] or 0
  71                         else
  72                                 break
  73                         end
  74                 end
  75         end
  76         return rotation + other
  77 end
  78
  79 screwdriver.rotate.colorwallmounted = screwdriver.rotate.wallmounted
  80
  81 -- Handles rotation
  82 screwdriver.handler = function(itemstack, user, pointed_thing, mode, uses)
  83         if pointed_thing.type ~= "node" then
  84                 return
  85         end
  86
  87         local pos = pointed_thing.under
  88         local player_name = user and user:get_player_name() or ""
  89
  90         if minetest.is_protected(pos, player_name) then
  91                 minetest.record_protection_violation(pos, player_name)
  92                 return
  93         end
  94
  95         local node = minetest.get_node(pos)
  96         local ndef = minetest.registered_nodes[node.name]
  97         if not ndef then
  98                 return itemstack
  99         end
 100         -- can we rotate this paramtype2?
 101         local fn = screwdriver.rotate[ndef.paramtype2]
 102         if not fn and not ndef.on_rotate then
 103                 return itemstack
 104         end
 105
 106         local should_rotate = true
 107         local new_param2
 108         if fn then
 109                 new_param2 = fn(pos, node, mode)
 110         else
 111                 new_param2 = node.param2
 112         end
 113
 114         -- Node provides a handler, so let the handler decide instead if the node can be rotated
 115         if ndef.on_rotate then
 116                 -- Copy pos and node because callback can modify it
 117                 local result = ndef.on_rotate(vector.new(pos),
 118                                 {name = node.name, param1 = node.param1, param2 = node.param2},
 119                                 user, mode, new_param2)
 120                 if result == false then -- Disallow rotation
 121                         return itemstack
 122                 elseif result == true then
 123                         should_rotate = false
 124                 end
 125         elseif ndef.on_rotate == false then
 126                 return itemstack
 127         elseif ndef.can_dig and not ndef.can_dig(pos, user) then
 128                 return itemstack
 129         end
 130
 131         if should_rotate and new_param2 ~= node.param2 then
 132                 node.param2 = new_param2
 133                 minetest.swap_node(pos, node)
 134                 minetest.check_for_falling(pos)
 135         end
 136
 137         if not (creative and creative.is_enabled_for and
 138                         creative.is_enabled_for(player_name)) then
 139                 itemstack:add_wear(65535 / ((uses or 200) - 1))
 140         end
 141
 142         return itemstack
 143 end
 144
 145 -- Screwdriver
 146 minetest.register_tool("screwdriver:screwdriver", {
 147         description = "Screwdriver (left-click rotates face, right-click rotates axis)",
 148         inventory_image = "screwdriver.png",
 149         on_use = function(itemstack, user, pointed_thing)
 150                 screwdriver.handler(itemstack, user, pointed_thing, screwdriver.ROTATE_FACE, 200)
 151                 return itemstack
 152         end,
 153         on_place = function(itemstack, user, pointed_thing)
 154                 screwdriver.handler(itemstack, user, pointed_thing, screwdriver.ROTATE_AXIS, 200)
 155                 return itemstack
 156         end,
 157 })
 158
 159
 160 minetest.register_craft({
 161         output = "screwdriver:screwdriver",
 162         recipe = {
 163                 {"default:steel_ingot"},
 164                 {"group:stick"}
 165         }
 166 })
 167
 168 minetest.register_alias("screwdriver:screwdriver1", "screwdriver:screwdriver")
 169 minetest.register_alias("screwdriver:screwdriver2", "screwdriver:screwdriver")
 170 minetest.register_alias("screwdriver:screwdriver3", "screwdriver:screwdriver")
 171 minetest.register_alias("screwdriver:screwdriver4", "screwdriver:screwdriver")