mods/tnt/init.lua

   1 tnt = {}
   2
   3 -- Default to enabled when in singleplayer
   4 local enable_tnt = minetest.settings:get_bool("enable_tnt")
   5 if enable_tnt == nil then
   6         enable_tnt = minetest.is_singleplayer()
   7 end
   8
   9 -- loss probabilities array (one in X will be lost)
  10 local loss_prob = {}
  11
  12 loss_prob["default:cobble"] = 3
  13 loss_prob["default:dirt"] = 4
  14
  15 local tnt_radius = tonumber(minetest.settings:get("tnt_radius") or 3)
  16
  17 -- Fill a list with data for content IDs, after all nodes are registered
  18 local cid_data = {}
  19 minetest.after(0, function()
  20         for name, def in pairs(minetest.registered_nodes) do
  21                 cid_data[minetest.get_content_id(name)] = {
  22                         name = name,
  23                         drops = def.drops,
  24                         flammable = def.groups.flammable,
  25                         on_blast = def.on_blast,
  26                 }
  27         end
  28 end)
  29
  30 local function rand_pos(center, pos, radius)
  31         local def
  32         local reg_nodes = minetest.registered_nodes
  33         local i = 0
  34         repeat
  35                 -- Give up and use the center if this takes too long
  36                 if i > 4 then
  37                         pos.x, pos.z = center.x, center.z
  38                         break
  39                 end
  40                 pos.x = center.x + math.random(-radius, radius)
  41                 pos.z = center.z + math.random(-radius, radius)
  42                 def = reg_nodes[minetest.get_node(pos).name]
  43                 i = i + 1
  44         until def and not def.walkable
  45 end
  46
  47 local function eject_drops(drops, pos, radius)
  48         local drop_pos = vector.new(pos)
  49         for _, item in pairs(drops) do
  50                 local count = math.min(item:get_count(), item:get_stack_max())
  51                 while count > 0 do
  52                         local take = math.max(1,math.min(radius * radius,
  53                                         count,
  54                                         item:get_stack_max()))
  55                         rand_pos(pos, drop_pos, radius)
  56                         local dropitem = ItemStack(item)
  57                         dropitem:set_count(take)
  58                         local obj = minetest.add_item(drop_pos, dropitem)
  59                         if obj then
  60                                 obj:get_luaentity().collect = true
  61                                 obj:set_acceleration({x = 0, y = -10, z = 0})
  62                                 obj:set_velocity({x = math.random(-3, 3),
  63                                                 y = math.random(0, 10),
  64                                                 z = math.random(-3, 3)})
  65                         end
  66                         count = count - take
  67                 end
  68         end
  69 end
  70
  71 local function add_drop(drops, item)
  72         item = ItemStack(item)
  73         local name = item:get_name()
  74         if loss_prob[name] ~= nil and math.random(1, loss_prob[name]) == 1 then
  75                 return
  76         end
  77
  78         local drop = drops[name]
  79         if drop == nil then
  80                 drops[name] = item
  81         else
  82                 drop:set_count(drop:get_count() + item:get_count())
  83         end
  84 end
  85
  86 local basic_flame_on_construct -- cached value
  87 local function destroy(drops, npos, cid, c_air, c_fire,
  88                 on_blast_queue, on_construct_queue,
  89                 ignore_protection, ignore_on_blast, owner)
  90         if not ignore_protection and minetest.is_protected(npos, owner) then
  91                 return cid
  92         end
  93
  94         local def = cid_data[cid]
  95
  96         if not def then
  97                 return c_air
  98         elseif not ignore_on_blast and def.on_blast then
  99                 on_blast_queue[#on_blast_queue + 1] = {
 100                         pos = vector.new(npos),
 101                         on_blast = def.on_blast
 102                 }
 103                 return cid
 104         elseif def.flammable then
 105                 on_construct_queue[#on_construct_queue + 1] = {
 106                         fn = basic_flame_on_construct,
 107                         pos = vector.new(npos)
 108                 }
 109                 return c_fire
 110         else
 111                 local node_drops = minetest.get_node_drops(def.name, "")
 112                 for _, item in pairs(node_drops) do
 113                         add_drop(drops, item)
 114                 end
 115                 return c_air
 116         end
 117 end
 118
 119 local function calc_velocity(pos1, pos2, old_vel, power)
 120         -- Avoid errors caused by a vector of zero length
 121         if vector.equals(pos1, pos2) then
 122                 return old_vel
 123         end
 124
 125         local vel = vector.direction(pos1, pos2)
 126         vel = vector.normalize(vel)
 127         vel = vector.multiply(vel, power)
 128
 129         -- Divide by distance
 130         local dist = vector.distance(pos1, pos2)
 131         dist = math.max(dist, 1)
 132         vel = vector.divide(vel, dist)
 133
 134         -- Add old velocity
 135         vel = vector.add(vel, old_vel)
 136
 137         -- randomize it a bit
 138         vel = vector.add(vel, {
 139                 x = math.random() - 0.5,
 140                 y = math.random() - 0.5,
 141                 z = math.random() - 0.5,
 142         })
 143
 144         -- Limit to terminal velocity
 145         dist = vector.length(vel)
 146         if dist > 250 then
 147                 vel = vector.divide(vel, dist / 250)
 148         end
 149         return vel
 150 end
 151
 152 local function entity_physics(pos, radius, drops)
 153         local objs = minetest.get_objects_inside_radius(pos, radius)
 154         for _, obj in pairs(objs) do
 155                 local obj_pos = obj:get_pos()
 156                 local dist = math.max(1, vector.distance(pos, obj_pos))
 157
 158                 local damage = (4 / dist) * radius
 159                 if obj:is_player() then
 160                         -- currently the engine has no method to set
 161                         -- player velocity. See #2960
 162                         -- instead, we knock the player back 1.0 node, and slightly upwards
 163                         local dir = vector.normalize(vector.subtract(obj_pos, pos))
 164                         local moveoff = vector.multiply(dir, dist + 1.0)
 165                         local newpos = vector.add(pos, moveoff)
 166                         newpos = vector.add(newpos, {x = 0, y = 0.2, z = 0})
 167                         obj:set_pos(newpos)
 168
 169                         obj:set_hp(obj:get_hp() - damage)
 170                 else
 171                         local do_damage = true
 172                         local do_knockback = true
 173                         local entity_drops = {}
 174                         local luaobj = obj:get_luaentity()
 175                         local objdef = minetest.registered_entities[luaobj.name]
 176
 177                         if objdef and objdef.on_blast then
 178                                 do_damage, do_knockback, entity_drops = objdef.on_blast(luaobj, damage)
 179                         end
 180
 181                         if do_knockback then
 182                                 local obj_vel = obj:get_velocity()
 183                                 obj:set_velocity(calc_velocity(pos, obj_pos,
 184                                                 obj_vel, radius * 10))
 185                         end
 186                         if do_damage then
 187                                 if not obj:get_armor_groups().immortal then
 188                                         obj:punch(obj, 1.0, {
 189                                                 full_punch_interval = 1.0,
 190                                                 damage_groups = {fleshy = damage},
 191                                         }, nil)
 192                                 end
 193                         end
 194                         for _, item in pairs(entity_drops) do
 195                                 add_drop(drops, item)
 196                         end
 197                 end
 198         end
 199 end
 200
 201 local function add_effects(pos, radius, drops)
 202         minetest.add_particle({
 203                 pos = pos,
 204                 velocity = vector.new(),
 205                 acceleration = vector.new(),
 206                 expirationtime = 0.4,
 207                 size = radius * 10,
 208                 collisiondetection = false,
 209                 vertical = false,
 210                 texture = "tnt_boom.png",
 211                 glow = 15,
 212         })
 213         minetest.add_particlespawner({
 214                 amount = 64,
 215                 time = 0.5,
 216                 minpos = vector.subtract(pos, radius / 2),
 217                 maxpos = vector.add(pos, radius / 2),
 218                 minvel = {x = -10, y = -10, z = -10},
 219                 maxvel = {x = 10, y = 10, z = 10},
 220                 minacc = vector.new(),
 221                 maxacc = vector.new(),
 222                 minexptime = 1,
 223                 maxexptime = 2.5,
 224                 minsize = radius * 3,
 225                 maxsize = radius * 5,
 226                 texture = "tnt_smoke.png",
 227         })
 228
 229         -- we just dropped some items. Look at the items entities and pick
 230         -- one of them to use as texture
 231         local texture = "tnt_blast.png" --fallback texture
 232         local most = 0
 233         for name, stack in pairs(drops) do
 234                 local count = stack:get_count()
 235                 if count > most then
 236                         most = count
 237                         local def = minetest.registered_nodes[name]
 238                         if def and def.tiles and def.tiles[1] then
 239                                 texture = def.tiles[1]
 240                         end
 241                 end
 242         end
 243
 244         minetest.add_particlespawner({
 245                 amount = 64,
 246                 time = 0.1,
 247                 minpos = vector.subtract(pos, radius / 2),
 248                 maxpos = vector.add(pos, radius / 2),
 249                 minvel = {x = -3, y = 0, z = -3},
 250                 maxvel = {x = 3, y = 5,  z = 3},
 251                 minacc = {x = 0, y = -10, z = 0},
 252                 maxacc = {x = 0, y = -10, z = 0},
 253                 minexptime = 0.8,
 254                 maxexptime = 2.0,
 255                 minsize = radius * 0.66,
 256                 maxsize = radius * 2,
 257                 texture = texture,
 258                 collisiondetection = true,
 259         })
 260 end
 261
 262 function tnt.burn(pos, nodename)
 263         local name = nodename or minetest.get_node(pos).name
 264         local def = minetest.registered_nodes[name]
 265         if not def then
 266                 return
 267         elseif def.on_ignite then
 268                 def.on_ignite(pos)
 269         elseif minetest.get_item_group(name, "tnt") > 0 then
 270                 minetest.swap_node(pos, {name = name .. "_burning"})
 271                 minetest.sound_play("tnt_ignite", {pos = pos})
 272                 minetest.get_node_timer(pos):start(1)
 273         end
 274 end
 275
 276 local function tnt_explode(pos, radius, ignore_protection, ignore_on_blast, owner, explode_center)
 277         pos = vector.round(pos)
 278         -- scan for adjacent TNT nodes first, and enlarge the explosion
 279         local vm1 = VoxelManip()
 280         local p1 = vector.subtract(pos, 2)
 281         local p2 = vector.add(pos, 2)
 282         local minp, maxp = vm1:read_from_map(p1, p2)
 283         local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
 284         local data = vm1:get_data()
 285         local count = 0
 286         local c_tnt = minetest.get_content_id("tnt:tnt")
 287         local c_tnt_burning = minetest.get_content_id("tnt:tnt_burning")
 288         local c_tnt_boom = minetest.get_content_id("tnt:boom")
 289         local c_air = minetest.get_content_id("air")
 290         -- make sure we still have explosion even when centre node isnt tnt related
 291         if explode_center then
 292                 count = 1
 293         end
 294
 295         for z = pos.z - 2, pos.z + 2 do
 296         for y = pos.y - 2, pos.y + 2 do
 297                 local vi = a:index(pos.x - 2, y, z)
 298                 for x = pos.x - 2, pos.x + 2 do
 299                         local cid = data[vi]
 300                         if cid == c_tnt or cid == c_tnt_boom or cid == c_tnt_burning then
 301                                 count = count + 1
 302                                 data[vi] = c_air
 303                         end
 304                         vi = vi + 1
 305                 end
 306         end
 307         end
 308
 309         vm1:set_data(data)
 310         vm1:write_to_map()
 311
 312         -- recalculate new radius
 313         radius = math.floor(radius * math.pow(count, 1/3))
 314
 315         -- perform the explosion
 316         local vm = VoxelManip()
 317         local pr = PseudoRandom(os.time())
 318         p1 = vector.subtract(pos, radius)
 319         p2 = vector.add(pos, radius)
 320         minp, maxp = vm:read_from_map(p1, p2)
 321         a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
 322         data = vm:get_data()
 323
 324         local drops = {}
 325         local on_blast_queue = {}
 326         local on_construct_queue = {}
 327         basic_flame_on_construct = minetest.registered_nodes["fire:basic_flame"].on_construct
 328
 329         local c_fire = minetest.get_content_id("fire:basic_flame")
 330         for z = -radius, radius do
 331         for y = -radius, radius do
 332         local vi = a:index(pos.x + (-radius), pos.y + y, pos.z + z)
 333         for x = -radius, radius do
 334                 local r = vector.length(vector.new(x, y, z))
 335                 if (radius * radius) / (r * r) >= (pr:next(80, 125) / 100) then
 336                         local cid = data[vi]
 337                         local p = {x = pos.x + x, y = pos.y + y, z = pos.z + z}
 338                         if cid ~= c_air then
 339                                 data[vi] = destroy(drops, p, cid, c_air, c_fire,
 340                                         on_blast_queue, on_construct_queue,
 341                                         ignore_protection, ignore_on_blast, owner)
 342                         end
 343                 end
 344                 vi = vi + 1
 345         end
 346         end
 347         end
 348
 349         vm:set_data(data)
 350         vm:write_to_map()
 351         vm:update_map()
 352         vm:update_liquids()
 353
 354         -- call check_single_for_falling for everything within 1.5x blast radius
 355         for y = -radius * 1.5, radius * 1.5 do
 356         for z = -radius * 1.5, radius * 1.5 do
 357         for x = -radius * 1.5, radius * 1.5 do
 358                 local rad = {x = x, y = y, z = z}
 359                 local s = vector.add(pos, rad)
 360                 local r = vector.length(rad)
 361                 if r / radius < 1.4 then
 362                         minetest.check_single_for_falling(s)
 363                 end
 364         end
 365         end
 366         end
 367
 368         for _, queued_data in pairs(on_blast_queue) do
 369                 local dist = math.max(1, vector.distance(queued_data.pos, pos))
 370                 local intensity = (radius * radius) / (dist * dist)
 371                 local node_drops = queued_data.on_blast(queued_data.pos, intensity)
 372                 if node_drops then
 373                         for _, item in pairs(node_drops) do
 374                                 add_drop(drops, item)
 375                         end
 376                 end
 377         end
 378
 379         for _, queued_data in pairs(on_construct_queue) do
 380                 queued_data.fn(queued_data.pos)
 381         end
 382
 383         minetest.log("action", "TNT owned by " .. owner .. " detonated at " ..
 384                 minetest.pos_to_string(pos) .. " with radius " .. radius)
 385
 386         return drops, radius
 387 end
 388
 389 function tnt.boom(pos, def)
 390         def = def or {}
 391         def.radius = def.radius or 1
 392         def.damage_radius = def.damage_radius or def.radius * 2
 393         local meta = minetest.get_meta(pos)
 394         local owner = meta:get_string("owner")
 395         if not def.explode_center then
 396                 minetest.set_node(pos, {name = "tnt:boom"})
 397         end
 398         local sound = def.sound or "tnt_explode"
 399         minetest.sound_play(sound, {pos = pos, gain = 1.5,
 400                         max_hear_distance = math.min(def.radius * 20, 128)})
 401         local drops, radius = tnt_explode(pos, def.radius, def.ignore_protection,
 402                         def.ignore_on_blast, owner, def.explode_center)
 403         -- append entity drops
 404         local damage_radius = (radius / math.max(1, def.radius)) * def.damage_radius
 405         entity_physics(pos, damage_radius, drops)
 406         if not def.disable_drops then
 407                 eject_drops(drops, pos, radius)
 408         end
 409         add_effects(pos, radius, drops)
 410         minetest.log("action", "A TNT explosion occurred at " .. minetest.pos_to_string(pos) ..
 411                 " with radius " .. radius)
 412 end
 413
 414 minetest.register_node("tnt:boom", {
 415         drawtype = "airlike",
 416         light_source = default.LIGHT_MAX,
 417         walkable = false,
 418         drop = "",
 419         groups = {dig_immediate = 3},
 420         -- unaffected by explosions
 421         on_blast = function() end,
 422 })
 423
 424 minetest.register_node("tnt:gunpowder", {
 425         description = "Gun Powder",
 426         drawtype = "raillike",
 427         paramtype = "light",
 428         is_ground_content = false,
 429         sunlight_propagates = true,
 430         walkable = false,
 431         tiles = {
 432                 "tnt_gunpowder_straight.png",
 433                 "tnt_gunpowder_curved.png",
 434                 "tnt_gunpowder_t_junction.png",
 435                 "tnt_gunpowder_crossing.png"
 436         },
 437         inventory_image = "tnt_gunpowder_inventory.png",
 438         wield_image = "tnt_gunpowder_inventory.png",
 439         selection_box = {
 440                 type = "fixed",
 441                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 442         },
 443         groups = {dig_immediate = 2, attached_node = 1, flammable = 5,
 444                 connect_to_raillike = minetest.raillike_group("gunpowder")},
 445         sounds = default.node_sound_leaves_defaults(),
 446
 447         on_punch = function(pos, node, puncher)
 448                 if puncher:get_wielded_item():get_name() == "default:torch" then
 449                         minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
 450                         minetest.log("action", puncher:get_player_name() ..
 451                                 " ignites tnt:gunpowder at " ..
 452                                 minetest.pos_to_string(pos))
 453                 end
 454         end,
 455         on_blast = function(pos, intensity)
 456                 minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
 457         end,
 458         on_burn = function(pos)
 459                 minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
 460         end,
 461         on_ignite = function(pos, igniter)
 462                 minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
 463         end,
 464 })
 465
 466 minetest.register_node("tnt:gunpowder_burning", {
 467         drawtype = "raillike",
 468         paramtype = "light",
 469         sunlight_propagates = true,
 470         walkable = false,
 471         light_source = 5,
 472         tiles = {{
 473                 name = "tnt_gunpowder_burning_straight_animated.png",
 474                 animation = {
 475                         type = "vertical_frames",
 476                         aspect_w = 16,
 477                         aspect_h = 16,
 478                         length = 1,
 479                 }
 480         },
 481         {
 482                 name = "tnt_gunpowder_burning_curved_animated.png",
 483                 animation = {
 484                         type = "vertical_frames",
 485                         aspect_w = 16,
 486                         aspect_h = 16,
 487                         length = 1,
 488                 }
 489         },
 490         {
 491                 name = "tnt_gunpowder_burning_t_junction_animated.png",
 492                 animation = {
 493                         type = "vertical_frames",
 494                         aspect_w = 16,
 495                         aspect_h = 16,
 496                         length = 1,
 497                 }
 498         },
 499         {
 500                 name = "tnt_gunpowder_burning_crossing_animated.png",
 501                 animation = {
 502                         type = "vertical_frames",
 503                         aspect_w = 16,
 504                         aspect_h = 16,
 505                         length = 1,
 506                 }
 507         }},
 508         selection_box = {
 509                 type = "fixed",
 510                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 511         },
 512         drop = "",
 513         groups = {
 514                 dig_immediate = 2,
 515                 attached_node = 1,
 516                 connect_to_raillike = minetest.raillike_group("gunpowder")
 517         },
 518         sounds = default.node_sound_leaves_defaults(),
 519         on_timer = function(pos, elapsed)
 520                 for dx = -1, 1 do
 521                 for dz = -1, 1 do
 522                         if math.abs(dx) + math.abs(dz) == 1 then
 523                                 for dy = -1, 1 do
 524                                         tnt.burn({
 525                                                 x = pos.x + dx,
 526                                                 y = pos.y + dy,
 527                                                 z = pos.z + dz,
 528                                         })
 529                                 end
 530                         end
 531                 end
 532                 end
 533                 minetest.remove_node(pos)
 534         end,
 535         -- unaffected by explosions
 536         on_blast = function() end,
 537         on_construct = function(pos)
 538                 minetest.sound_play("tnt_gunpowder_burning", {pos = pos, gain = 2})
 539                 minetest.get_node_timer(pos):start(1)
 540         end,
 541 })
 542
 543 minetest.register_craft({
 544         output = "tnt:gunpowder 5",
 545         type = "shapeless",
 546         recipe = {"default:coal_lump", "default:gravel"}
 547 })
 548
 549 minetest.register_craftitem("tnt:tnt_stick", {
 550         description = "TNT Stick",
 551         inventory_image = "tnt_tnt_stick.png",
 552         groups = {flammable = 5},
 553 })
 554
 555 if enable_tnt then
 556         minetest.register_craft({
 557                 output = "tnt:tnt_stick 2",
 558                 recipe = {
 559                         {"tnt:gunpowder", "", "tnt:gunpowder"},
 560                         {"tnt:gunpowder", "default:paper", "tnt:gunpowder"},
 561                         {"tnt:gunpowder", "", "tnt:gunpowder"},
 562                 }
 563         })
 564
 565         minetest.register_craft({
 566                 output = "tnt:tnt",
 567                 recipe = {
 568                         {"tnt:tnt_stick", "tnt:tnt_stick", "tnt:tnt_stick"},
 569                         {"tnt:tnt_stick", "tnt:tnt_stick", "tnt:tnt_stick"},
 570                         {"tnt:tnt_stick", "tnt:tnt_stick", "tnt:tnt_stick"}
 571                 }
 572         })
 573
 574         minetest.register_abm({
 575                 label = "TNT ignition",
 576                 nodenames = {"group:tnt", "tnt:gunpowder"},
 577                 neighbors = {"fire:basic_flame", "default:lava_source", "default:lava_flowing"},
 578                 interval = 4,
 579                 chance = 1,
 580                 action = function(pos, node)
 581                         tnt.burn(pos, node.name)
 582                 end,
 583         })
 584 end
 585
 586 function tnt.register_tnt(def)
 587         local name
 588         if not def.name:find(':') then
 589                 name = "tnt:" .. def.name
 590         else
 591                 name = def.name
 592                 def.name = def.name:match(":([%w_]+)")
 593         end
 594         if not def.tiles then def.tiles = {} end
 595         local tnt_top = def.tiles.top or def.name .. "_top.png"
 596         local tnt_bottom = def.tiles.bottom or def.name .. "_bottom.png"
 597         local tnt_side = def.tiles.side or def.name .. "_side.png"
 598         local tnt_burning = def.tiles.burning or def.name .. "_top_burning_animated.png"
 599         if not def.damage_radius then def.damage_radius = def.radius * 2 end
 600
 601         if enable_tnt then
 602                 minetest.register_node(":" .. name, {
 603                         description = def.description,
 604                         tiles = {tnt_top, tnt_bottom, tnt_side},
 605                         is_ground_content = false,
 606                         groups = {dig_immediate = 2, mesecon = 2, tnt = 1, flammable = 5},
 607                         sounds = default.node_sound_wood_defaults(),
 608                         after_place_node = function(pos, placer)
 609                                 if placer:is_player() then
 610                                         local meta = minetest.get_meta(pos)
 611                                         meta:set_string("owner", placer:get_player_name())
 612                                 end
 613                         end,
 614                         on_punch = function(pos, node, puncher)
 615                                 if puncher:get_wielded_item():get_name() == "default:torch" then
 616                                         minetest.swap_node(pos, {name = name .. "_burning"})
 617                                         minetest.registered_nodes[name .. "_burning"].on_construct(pos)
 618                                         minetest.log("action", puncher:get_player_name() ..
 619                                                 " ignites " .. node.name .. " at " ..
 620                                                 minetest.pos_to_string(pos))
 621                                 end
 622                         end,
 623                         on_blast = function(pos, intensity)
 624                                 minetest.after(0.1, function()
 625                                         tnt.boom(pos, def)
 626                                 end)
 627                         end,
 628                         mesecons = {effector =
 629                                 {action_on =
 630                                         function(pos)
 631                                                 tnt.boom(pos, def)
 632                                         end
 633                                 }
 634                         },
 635                         on_burn = function(pos)
 636                                 minetest.swap_node(pos, {name = name .. "_burning"})
 637                                 minetest.registered_nodes[name .. "_burning"].on_construct(pos)
 638                         end,
 639                         on_ignite = function(pos, igniter)
 640                                 minetest.swap_node(pos, {name = name .. "_burning"})
 641                                 minetest.registered_nodes[name .. "_burning"].on_construct(pos)
 642                         end,
 643                 })
 644         end
 645
 646         minetest.register_node(":" .. name .. "_burning", {
 647                 tiles = {
 648                         {
 649                                 name = tnt_burning,
 650                                 animation = {
 651                                         type = "vertical_frames",
 652                                         aspect_w = 16,
 653                                         aspect_h = 16,
 654                                         length = 1,
 655                                 }
 656                         },
 657                         tnt_bottom, tnt_side
 658                         },
 659                 light_source = 5,
 660                 drop = "",
 661                 sounds = default.node_sound_wood_defaults(),
 662                 groups = {falling_node = 1},
 663                 on_timer = function(pos, elapsed)
 664                         tnt.boom(pos, def)
 665                 end,
 666                 -- unaffected by explosions
 667                 on_blast = function() end,
 668                 on_construct = function(pos)
 669                         minetest.sound_play("tnt_ignite", {pos = pos})
 670                         minetest.get_node_timer(pos):start(4)
 671                         minetest.check_for_falling(pos)
 672                 end,
 673         })
 674 end
 675
 676 tnt.register_tnt({
 677         name = "tnt:tnt",
 678         description = "TNT",
 679         radius = tnt_radius,
 680 })