builtin/game/item.lua

   1 -- Minetest: builtin/item.lua
   2
   3 local builtin_shared = ...
   4
   5 local function copy_pointed_thing(pointed_thing)
   6         return {
   7                 type  = pointed_thing.type,
   8                 above = vector.new(pointed_thing.above),
   9                 under = vector.new(pointed_thing.under),
  10                 ref   = pointed_thing.ref,
  11         }
  12 end
  13
  14 --
  15 -- Item definition helpers
  16 --
  17
  18 function core.inventorycube(img1, img2, img3)
  19         img2 = img2 or img1
  20         img3 = img3 or img1
  21         return "[inventorycube"
  22                         .. "{" .. img1:gsub("%^", "&")
  23                         .. "{" .. img2:gsub("%^", "&")
  24                         .. "{" .. img3:gsub("%^", "&")
  25 end
  26
  27 function core.dir_to_facedir(dir, is6d)
  28         --account for y if requested
  29         if is6d and math.abs(dir.y) > math.abs(dir.x) and math.abs(dir.y) > math.abs(dir.z) then
  30
  31                 --from above
  32                 if dir.y < 0 then
  33                         if math.abs(dir.x) > math.abs(dir.z) then
  34                                 if dir.x < 0 then
  35                                         return 19
  36                                 else
  37                                         return 13
  38                                 end
  39                         else
  40                                 if dir.z < 0 then
  41                                         return 10
  42                                 else
  43                                         return 4
  44                                 end
  45                         end
  46
  47                 --from below
  48                 else
  49                         if math.abs(dir.x) > math.abs(dir.z) then
  50                                 if dir.x < 0 then
  51                                         return 15
  52                                 else
  53                                         return 17
  54                                 end
  55                         else
  56                                 if dir.z < 0 then
  57                                         return 6
  58                                 else
  59                                         return 8
  60                                 end
  61                         end
  62                 end
  63
  64         --otherwise, place horizontally
  65         elseif math.abs(dir.x) > math.abs(dir.z) then
  66                 if dir.x < 0 then
  67                         return 3
  68                 else
  69                         return 1
  70                 end
  71         else
  72                 if dir.z < 0 then
  73                         return 2
  74                 else
  75                         return 0
  76                 end
  77         end
  78 end
  79
  80 -- Table of possible dirs
  81 local facedir_to_dir = {
  82         {x= 0, y=0,  z= 1},
  83         {x= 1, y=0,  z= 0},
  84         {x= 0, y=0,  z=-1},
  85         {x=-1, y=0,  z= 0},
  86         {x= 0, y=-1, z= 0},
  87         {x= 0, y=1,  z= 0},
  88 }
  89 -- Mapping from facedir value to index in facedir_to_dir.
  90 local facedir_to_dir_map = {
  91         [0]=1, 2, 3, 4,
  92         5, 2, 6, 4,
  93         6, 2, 5, 4,
  94         1, 5, 3, 6,
  95         1, 6, 3, 5,
  96         1, 4, 3, 2,
  97 }
  98 function core.facedir_to_dir(facedir)
  99         return facedir_to_dir[facedir_to_dir_map[facedir % 32]]
 100 end
 101
 102 function core.dir_to_wallmounted(dir)
 103         if math.abs(dir.y) > math.max(math.abs(dir.x), math.abs(dir.z)) then
 104                 if dir.y < 0 then
 105                         return 1
 106                 else
 107                         return 0
 108                 end
 109         elseif math.abs(dir.x) > math.abs(dir.z) then
 110                 if dir.x < 0 then
 111                         return 3
 112                 else
 113                         return 2
 114                 end
 115         else
 116                 if dir.z < 0 then
 117                         return 5
 118                 else
 119                         return 4
 120                 end
 121         end
 122 end
 123
 124 -- table of dirs in wallmounted order
 125 local wallmounted_to_dir = {
 126         [0] = {x = 0, y = 1, z = 0},
 127         {x =  0, y = -1, z =  0},
 128         {x =  1, y =  0, z =  0},
 129         {x = -1, y =  0, z =  0},
 130         {x =  0, y =  0, z =  1},
 131         {x =  0, y =  0, z = -1},
 132 }
 133 function core.wallmounted_to_dir(wallmounted)
 134         return wallmounted_to_dir[wallmounted % 8]
 135 end
 136
 137 function core.dir_to_yaw(dir)
 138         return -math.atan2(dir.x, dir.z)
 139 end
 140
 141 function core.yaw_to_dir(yaw)
 142         return {x = -math.sin(yaw), y = 0, z = math.cos(yaw)}
 143 end
 144
 145 function core.is_colored_paramtype(ptype)
 146         return (ptype == "color") or (ptype == "colorfacedir") or
 147                 (ptype == "colorwallmounted")
 148 end
 149
 150 function core.strip_param2_color(param2, paramtype2)
 151         if not core.is_colored_paramtype(paramtype2) then
 152                 return nil
 153         end
 154         if paramtype2 == "colorfacedir" then
 155                 param2 = math.floor(param2 / 32) * 32
 156         elseif paramtype2 == "colorwallmounted" then
 157                 param2 = math.floor(param2 / 8) * 8
 158         end
 159         -- paramtype2 == "color" requires no modification.
 160         return param2
 161 end
 162
 163 function core.get_node_drops(node, toolname)
 164         -- Compatibility, if node is string
 165         local nodename = node
 166         local param2 = 0
 167         -- New format, if node is table
 168         if (type(node) == "table") then
 169                 nodename = node.name
 170                 param2 = node.param2
 171         end
 172         local def = core.registered_nodes[nodename]
 173         local drop = def and def.drop
 174         local ptype = def and def.paramtype2
 175         -- get color, if there is color (otherwise nil)
 176         local palette_index = core.strip_param2_color(param2, ptype)
 177         if drop == nil then
 178                 -- default drop
 179                 if palette_index then
 180                         local stack = ItemStack(nodename)
 181                         stack:get_meta():set_int("palette_index", palette_index)
 182                         return {stack:to_string()}
 183                 end
 184                 return {nodename}
 185         elseif type(drop) == "string" then
 186                 -- itemstring drop
 187                 return drop ~= "" and {drop} or {}
 188         elseif drop.items == nil then
 189                 -- drop = {} to disable default drop
 190                 return {}
 191         end
 192
 193         -- Extended drop table
 194         local got_items = {}
 195         local got_count = 0
 196         for _, item in ipairs(drop.items) do
 197                 local good_rarity = true
 198                 local good_tool = true
 199                 if item.rarity ~= nil then
 200                         good_rarity = item.rarity < 1 or math.random(item.rarity) == 1
 201                 end
 202                 if item.tools ~= nil then
 203                         good_tool = false
 204                 end
 205                 if item.tools ~= nil and toolname then
 206                         for _, tool in ipairs(item.tools) do
 207                                 if tool:sub(1, 1) == '~' then
 208                                         good_tool = toolname:find(tool:sub(2)) ~= nil
 209                                 else
 210                                         good_tool = toolname == tool
 211                                 end
 212                                 if good_tool then
 213                                         break
 214                                 end
 215                         end
 216                 end
 217                 if good_rarity and good_tool then
 218                         got_count = got_count + 1
 219                         for _, add_item in ipairs(item.items) do
 220                                 -- add color, if necessary
 221                                 if item.inherit_color and palette_index then
 222                                         local stack = ItemStack(add_item)
 223                                         stack:get_meta():set_int("palette_index", palette_index)
 224                                         add_item = stack:to_string()
 225                                 end
 226                                 got_items[#got_items+1] = add_item
 227                         end
 228                         if drop.max_items ~= nil and got_count == drop.max_items then
 229                                 break
 230                         end
 231                 end
 232         end
 233         return got_items
 234 end
 235
 236 local function user_name(user)
 237         return user and user:get_player_name() or ""
 238 end
 239
 240 -- Returns a logging function. For empty names, does not log.
 241 local function make_log(name)
 242         return name ~= "" and core.log or function() end
 243 end
 244
 245 function core.item_place_node(itemstack, placer, pointed_thing, param2,
 246                 prevent_after_place)
 247         local def = itemstack:get_definition()
 248         if def.type ~= "node" or pointed_thing.type ~= "node" then
 249                 return itemstack, nil
 250         end
 251
 252         local under = pointed_thing.under
 253         local oldnode_under = core.get_node_or_nil(under)
 254         local above = pointed_thing.above
 255         local oldnode_above = core.get_node_or_nil(above)
 256         local playername = user_name(placer)
 257         local log = make_log(playername)
 258
 259         if not oldnode_under or not oldnode_above then
 260                 log("info", playername .. " tried to place"
 261                         .. " node in unloaded position " .. core.pos_to_string(above))
 262                 return itemstack, nil
 263         end
 264
 265         local olddef_under = core.registered_nodes[oldnode_under.name]
 266         olddef_under = olddef_under or core.nodedef_default
 267         local olddef_above = core.registered_nodes[oldnode_above.name]
 268         olddef_above = olddef_above or core.nodedef_default
 269
 270         if not olddef_above.buildable_to and not olddef_under.buildable_to then
 271                 log("info", playername .. " tried to place"
 272                         .. " node in invalid position " .. core.pos_to_string(above)
 273                         .. ", replacing " .. oldnode_above.name)
 274                 return itemstack, nil
 275         end
 276
 277         -- Place above pointed node
 278         local place_to = {x = above.x, y = above.y, z = above.z}
 279
 280         -- If node under is buildable_to, place into it instead (eg. snow)
 281         if olddef_under.buildable_to then
 282                 log("info", "node under is buildable to")
 283                 place_to = {x = under.x, y = under.y, z = under.z}
 284         end
 285
 286         if core.is_protected(place_to, playername) then
 287                 log("action", playername
 288                                 .. " tried to place " .. def.name
 289                                 .. " at protected position "
 290                                 .. core.pos_to_string(place_to))
 291                 core.record_protection_violation(place_to, playername)
 292                 return itemstack, nil
 293         end
 294
 295         local oldnode = core.get_node(place_to)
 296         local newnode = {name = def.name, param1 = 0, param2 = param2 or 0}
 297
 298         -- Calculate direction for wall mounted stuff like torches and signs
 299         if def.place_param2 ~= nil then
 300                 newnode.param2 = def.place_param2
 301         elseif (def.paramtype2 == "wallmounted" or
 302                         def.paramtype2 == "colorwallmounted") and not param2 then
 303                 local dir = {
 304                         x = under.x - above.x,
 305                         y = under.y - above.y,
 306                         z = under.z - above.z
 307                 }
 308                 newnode.param2 = core.dir_to_wallmounted(dir)
 309         -- Calculate the direction for furnaces and chests and stuff
 310         elseif (def.paramtype2 == "facedir" or
 311                         def.paramtype2 == "colorfacedir") and not param2 then
 312                 local placer_pos = placer and placer:get_pos()
 313                 if placer_pos then
 314                         local dir = {
 315                                 x = above.x - placer_pos.x,
 316                                 y = above.y - placer_pos.y,
 317                                 z = above.z - placer_pos.z
 318                         }
 319                         newnode.param2 = core.dir_to_facedir(dir)
 320                         log("info", "facedir: " .. newnode.param2)
 321                 end
 322         end
 323
 324         local metatable = itemstack:get_meta():to_table().fields
 325
 326         -- Transfer color information
 327         if metatable.palette_index and not def.place_param2 then
 328                 local color_divisor = nil
 329                 if def.paramtype2 == "color" then
 330                         color_divisor = 1
 331                 elseif def.paramtype2 == "colorwallmounted" then
 332                         color_divisor = 8
 333                 elseif def.paramtype2 == "colorfacedir" then
 334                         color_divisor = 32
 335                 end
 336                 if color_divisor then
 337                         local color = math.floor(metatable.palette_index / color_divisor)
 338                         local other = newnode.param2 % color_divisor
 339                         newnode.param2 = color * color_divisor + other
 340                 end
 341         end
 342
 343         -- Check if the node is attached and if it can be placed there
 344         if core.get_item_group(def.name, "attached_node") ~= 0 and
 345                 not builtin_shared.check_attached_node(place_to, newnode) then
 346                 log("action", "attached node " .. def.name ..
 347                         " can not be placed at " .. core.pos_to_string(place_to))
 348                 return itemstack, nil
 349         end
 350
 351         log("action", playername .. " places node "
 352                 .. def.name .. " at " .. core.pos_to_string(place_to))
 353
 354         -- Add node and update
 355         core.add_node(place_to, newnode)
 356
 357         -- Play sound if it was done by a player
 358         if playername ~= "" and def.sounds and def.sounds.place then
 359                 core.sound_play(def.sounds.place, {
 360                         pos = place_to,
 361                         exclude_player = playername,
 362                 }, true)
 363         end
 364
 365         local take_item = true
 366
 367         -- Run callback
 368         if def.after_place_node and not prevent_after_place then
 369                 -- Deepcopy place_to and pointed_thing because callback can modify it
 370                 local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
 371                 local pointed_thing_copy = copy_pointed_thing(pointed_thing)
 372                 if def.after_place_node(place_to_copy, placer, itemstack,
 373                                 pointed_thing_copy) then
 374                         take_item = false
 375                 end
 376         end
 377
 378         -- Run script hook
 379         for _, callback in ipairs(core.registered_on_placenodes) do
 380                 -- Deepcopy pos, node and pointed_thing because callback can modify them
 381                 local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
 382                 local newnode_copy = {name=newnode.name, param1=newnode.param1, param2=newnode.param2}
 383                 local oldnode_copy = {name=oldnode.name, param1=oldnode.param1, param2=oldnode.param2}
 384                 local pointed_thing_copy = copy_pointed_thing(pointed_thing)
 385                 if callback(place_to_copy, newnode_copy, placer, oldnode_copy, itemstack, pointed_thing_copy) then
 386                         take_item = false
 387                 end
 388         end
 389
 390         if take_item then
 391                 itemstack:take_item()
 392         end
 393         return itemstack, place_to
 394 end
 395
 396 -- deprecated, item_place does not call this
 397 function core.item_place_object(itemstack, placer, pointed_thing)
 398         local pos = core.get_pointed_thing_position(pointed_thing, true)
 399         if pos ~= nil then
 400                 local item = itemstack:take_item()
 401                 core.add_item(pos, item)
 402         end
 403         return itemstack
 404 end
 405
 406 function core.item_place(itemstack, placer, pointed_thing, param2)
 407         -- Call on_rightclick if the pointed node defines it
 408         if pointed_thing.type == "node" and placer and
 409                         not placer:get_player_control().sneak then
 410                 local n = core.get_node(pointed_thing.under)
 411                 local nn = n.name
 412                 if core.registered_nodes[nn] and core.registered_nodes[nn].on_rightclick then
 413                         return core.registered_nodes[nn].on_rightclick(pointed_thing.under, n,
 414                                         placer, itemstack, pointed_thing) or itemstack, nil
 415                 end
 416         end
 417
 418         -- Place if node, otherwise do nothing
 419         if itemstack:get_definition().type == "node" then
 420                 return core.item_place_node(itemstack, placer, pointed_thing, param2)
 421         end
 422         return itemstack, nil
 423 end
 424
 425 function core.item_secondary_use(itemstack, placer)
 426         return itemstack
 427 end
 428
 429 function core.item_drop(itemstack, dropper, pos)
 430         local dropper_is_player = dropper and dropper:is_player()
 431         local p = table.copy(pos)
 432         local cnt = itemstack:get_count()
 433         if dropper_is_player then
 434                 p.y = p.y + 1.2
 435         end
 436         local item = itemstack:take_item(cnt)
 437         local obj = core.add_item(p, item)
 438         if obj then
 439                 if dropper_is_player then
 440                         local dir = dropper:get_look_dir()
 441                         dir.x = dir.x * 2.9
 442                         dir.y = dir.y * 2.9 + 2
 443                         dir.z = dir.z * 2.9
 444                         obj:set_velocity(dir)
 445                         obj:get_luaentity().dropped_by = dropper:get_player_name()
 446                 end
 447                 return itemstack
 448         end
 449         -- If we reach this, adding the object to the
 450         -- environment failed
 451 end
 452
 453 function core.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed_thing)
 454         for _, callback in pairs(core.registered_on_item_eats) do
 455                 local result = callback(hp_change, replace_with_item, itemstack, user, pointed_thing)
 456                 if result then
 457                         return result
 458                 end
 459         end
 460         local def = itemstack:get_definition()
 461         if itemstack:take_item() ~= nil then
 462                 user:set_hp(user:get_hp() + hp_change)
 463
 464                 if def and def.sound and def.sound.eat then
 465                         core.sound_play(def.sound.eat, {
 466                                 pos = user:get_pos(),
 467                                 max_hear_distance = 16
 468                         }, true)
 469                 end
 470
 471                 if replace_with_item then
 472                         if itemstack:is_empty() then
 473                                 itemstack:add_item(replace_with_item)
 474                         else
 475                                 local inv = user:get_inventory()
 476                                 -- Check if inv is null, since non-players don't have one
 477                                 if inv and inv:room_for_item("main", {name=replace_with_item}) then
 478                                         inv:add_item("main", replace_with_item)
 479                                 else
 480                                         local pos = user:get_pos()
 481                                         pos.y = math.floor(pos.y + 0.5)
 482                                         core.add_item(pos, replace_with_item)
 483                                 end
 484                         end
 485                 end
 486         end
 487         return itemstack
 488 end
 489
 490 function core.item_eat(hp_change, replace_with_item)
 491         return function(itemstack, user, pointed_thing)  -- closure
 492                 if user then
 493                         return core.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed_thing)
 494                 end
 495         end
 496 end
 497
 498 function core.node_punch(pos, node, puncher, pointed_thing)
 499         -- Run script hook
 500         for _, callback in ipairs(core.registered_on_punchnodes) do
 501                 -- Copy pos and node because callback can modify them
 502                 local pos_copy = vector.new(pos)
 503                 local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
 504                 local pointed_thing_copy = pointed_thing and copy_pointed_thing(pointed_thing) or nil
 505                 callback(pos_copy, node_copy, puncher, pointed_thing_copy)
 506         end
 507 end
 508
 509 function core.handle_node_drops(pos, drops, digger)
 510         -- Add dropped items to object's inventory
 511         local inv = digger and digger:get_inventory()
 512         local give_item
 513         if inv then
 514                 give_item = function(item)
 515                         return inv:add_item("main", item)
 516                 end
 517         else
 518                 give_item = function(item)
 519                         -- itemstring to ItemStack for left:is_empty()
 520                         return ItemStack(item)
 521                 end
 522         end
 523
 524         for _, dropped_item in pairs(drops) do
 525                 local left = give_item(dropped_item)
 526                 if not left:is_empty() then
 527                         local p = {
 528                                 x = pos.x + math.random()/2-0.25,
 529                                 y = pos.y + math.random()/2-0.25,
 530                                 z = pos.z + math.random()/2-0.25,
 531                         }
 532                         core.add_item(p, left)
 533                 end
 534         end
 535 end
 536
 537 function core.node_dig(pos, node, digger)
 538         local diggername = user_name(digger)
 539         local log = make_log(diggername)
 540         local def = core.registered_nodes[node.name]
 541         -- Copy pos because the callback could modify it
 542         if def and (not def.diggable or
 543                         (def.can_dig and not def.can_dig(vector.new(pos), digger))) then
 544                 log("info", diggername .. " tried to dig "
 545                         .. node.name .. " which is not diggable "
 546                         .. core.pos_to_string(pos))
 547                 return false
 548         end
 549
 550         if core.is_protected(pos, diggername) then
 551                 log("action", diggername
 552                                 .. " tried to dig " .. node.name
 553                                 .. " at protected position "
 554                                 .. core.pos_to_string(pos))
 555                 core.record_protection_violation(pos, diggername)
 556                 return false
 557         end
 558
 559         log('action', diggername .. " digs "
 560                 .. node.name .. " at " .. core.pos_to_string(pos))
 561
 562         local wielded = digger and digger:get_wielded_item()
 563         local drops = core.get_node_drops(node, wielded and wielded:get_name())
 564
 565         if wielded then
 566                 local wdef = wielded:get_definition()
 567                 local tp = wielded:get_tool_capabilities()
 568                 local dp = core.get_dig_params(def and def.groups, tp)
 569                 if wdef and wdef.after_use then
 570                         wielded = wdef.after_use(wielded, digger, node, dp) or wielded
 571                 else
 572                         -- Wear out tool
 573                         if not core.is_creative_enabled(diggername) then
 574                                 wielded:add_wear(dp.wear)
 575                                 if wielded:get_count() == 0 and wdef.sound and wdef.sound.breaks then
 576                                         core.sound_play(wdef.sound.breaks, {
 577                                                 pos = pos,
 578                                                 gain = 0.5
 579                                         }, true)
 580                                 end
 581                         end
 582                 end
 583                 digger:set_wielded_item(wielded)
 584         end
 585
 586         -- Check to see if metadata should be preserved.
 587         if def and def.preserve_metadata then
 588                 local oldmeta = core.get_meta(pos):to_table().fields
 589                 -- Copy pos and node because the callback can modify them.
 590                 local pos_copy = {x=pos.x, y=pos.y, z=pos.z}
 591                 local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
 592                 local drop_stacks = {}
 593                 for k, v in pairs(drops) do
 594                         drop_stacks[k] = ItemStack(v)
 595                 end
 596                 drops = drop_stacks
 597                 def.preserve_metadata(pos_copy, node_copy, oldmeta, drops)
 598         end
 599
 600         -- Handle drops
 601         core.handle_node_drops(pos, drops, digger)
 602
 603         local oldmetadata = nil
 604         if def and def.after_dig_node then
 605                 oldmetadata = core.get_meta(pos):to_table()
 606         end
 607
 608         -- Remove node and update
 609         core.remove_node(pos)
 610
 611         -- Play sound if it was done by a player
 612         if diggername ~= "" and def and def.sounds and def.sounds.dug then
 613                 core.sound_play(def.sounds.dug, {
 614                         pos = pos,
 615                         exclude_player = diggername,
 616                 }, true)
 617         end
 618
 619         -- Run callback
 620         if def and def.after_dig_node then
 621                 -- Copy pos and node because callback can modify them
 622                 local pos_copy = {x=pos.x, y=pos.y, z=pos.z}
 623                 local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
 624                 def.after_dig_node(pos_copy, node_copy, oldmetadata, digger)
 625         end
 626
 627         -- Run script hook
 628         for _, callback in ipairs(core.registered_on_dignodes) do
 629                 local origin = core.callback_origins[callback]
 630                 if origin then
 631                         core.set_last_run_mod(origin.mod)
 632                 end
 633
 634                 -- Copy pos and node because callback can modify them
 635                 local pos_copy = {x=pos.x, y=pos.y, z=pos.z}
 636                 local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
 637                 callback(pos_copy, node_copy, digger)
 638         end
 639
 640         return true
 641 end
 642
 643 function core.itemstring_with_palette(item, palette_index)
 644         local stack = ItemStack(item) -- convert to ItemStack
 645         stack:get_meta():set_int("palette_index", palette_index)
 646         return stack:to_string()
 647 end
 648
 649 function core.itemstring_with_color(item, colorstring)
 650         local stack = ItemStack(item) -- convert to ItemStack
 651         stack:get_meta():set_string("color", colorstring)
 652         return stack:to_string()
 653 end
 654
 655 -- This is used to allow mods to redefine core.item_place and so on
 656 -- NOTE: This is not the preferred way. Preferred way is to provide enough
 657 --       callbacks to not require redefining global functions. -celeron55
 658 local function redef_wrapper(table, name)
 659         return function(...)
 660                 return table[name](...)
 661         end
 662 end
 663
 664 --
 665 -- Item definition defaults
 666 --
 667
 668 local default_stack_max = tonumber(core.settings:get("default_stack_max")) or 99
 669
 670 core.nodedef_default = {
 671         -- Item properties
 672         type="node",
 673         -- name intentionally not defined here
 674         description = "",
 675         groups = {},
 676         inventory_image = "",
 677         wield_image = "",
 678         wield_scale = {x=1,y=1,z=1},
 679         stack_max = default_stack_max,
 680         usable = false,
 681         liquids_pointable = false,
 682         tool_capabilities = nil,
 683         node_placement_prediction = nil,
 684
 685         -- Interaction callbacks
 686         on_place = redef_wrapper(core, 'item_place'), -- core.item_place
 687         on_drop = redef_wrapper(core, 'item_drop'), -- core.item_drop
 688         on_use = nil,
 689         can_dig = nil,
 690
 691         on_punch = redef_wrapper(core, 'node_punch'), -- core.node_punch
 692         on_rightclick = nil,
 693         on_dig = redef_wrapper(core, 'node_dig'), -- core.node_dig
 694
 695         on_receive_fields = nil,
 696
 697         -- Node properties
 698         drawtype = "normal",
 699         visual_scale = 1.0,
 700         -- Don't define these because otherwise the old tile_images and
 701         -- special_materials wouldn't be read
 702         --tiles ={""},
 703         --special_tiles = {
 704         --      {name="", backface_culling=true},
 705         --      {name="", backface_culling=true},
 706         --},
 707         post_effect_color = {a=0, r=0, g=0, b=0},
 708         paramtype = "none",
 709         paramtype2 = "none",
 710         is_ground_content = true,
 711         sunlight_propagates = false,
 712         walkable = true,
 713         pointable = true,
 714         diggable = true,
 715         climbable = false,
 716         buildable_to = false,
 717         floodable = false,
 718         liquidtype = "none",
 719         liquid_alternative_flowing = "",
 720         liquid_alternative_source = "",
 721         liquid_viscosity = 0,
 722         drowning = 0,
 723         light_source = 0,
 724         damage_per_second = 0,
 725         selection_box = {type="regular"},
 726         legacy_facedir_simple = false,
 727         legacy_wallmounted = false,
 728 }
 729
 730 core.craftitemdef_default = {
 731         type="craft",
 732         -- name intentionally not defined here
 733         description = "",
 734         groups = {},
 735         inventory_image = "",
 736         wield_image = "",
 737         wield_scale = {x=1,y=1,z=1},
 738         stack_max = default_stack_max,
 739         liquids_pointable = false,
 740         tool_capabilities = nil,
 741
 742         -- Interaction callbacks
 743         on_place = redef_wrapper(core, 'item_place'), -- core.item_place
 744         on_drop = redef_wrapper(core, 'item_drop'), -- core.item_drop
 745         on_secondary_use = redef_wrapper(core, 'item_secondary_use'),
 746         on_use = nil,
 747 }
 748
 749 core.tooldef_default = {
 750         type="tool",
 751         -- name intentionally not defined here
 752         description = "",
 753         groups = {},
 754         inventory_image = "",
 755         wield_image = "",
 756         wield_scale = {x=1,y=1,z=1},
 757         stack_max = 1,
 758         liquids_pointable = false,
 759         tool_capabilities = nil,
 760
 761         -- Interaction callbacks
 762         on_place = redef_wrapper(core, 'item_place'), -- core.item_place
 763         on_secondary_use = redef_wrapper(core, 'item_secondary_use'),
 764         on_drop = redef_wrapper(core, 'item_drop'), -- core.item_drop
 765         on_use = nil,
 766 }
 767
 768 core.noneitemdef_default = {  -- This is used for the hand and unknown items
 769         type="none",
 770         -- name intentionally not defined here
 771         description = "",
 772         groups = {},
 773         inventory_image = "",
 774         wield_image = "",
 775         wield_scale = {x=1,y=1,z=1},
 776         stack_max = default_stack_max,
 777         liquids_pointable = false,
 778         tool_capabilities = nil,
 779
 780         -- Interaction callbacks
 781         on_place = redef_wrapper(core, 'item_place'),
 782         on_secondary_use = redef_wrapper(core, 'item_secondary_use'),
 783         on_drop = nil,
 784         on_use = nil,
 785 }