mods/default/mapgen.lua

   1 --
   2 -- Aliases for map generator outputs
   3 --
   4
   5
   6 minetest.register_alias("mapgen_stone", "default:stone")
   7 minetest.register_alias("mapgen_dirt", "default:dirt")
   8 minetest.register_alias("mapgen_dirt_with_grass", "default:dirt_with_grass")
   9 minetest.register_alias("mapgen_sand", "default:sand")
  10 minetest.register_alias("mapgen_water_source", "default:water_source")
  11 minetest.register_alias("mapgen_river_water_source", "default:river_water_source")
  12 minetest.register_alias("mapgen_lava_source", "default:lava_source")
  13 minetest.register_alias("mapgen_gravel", "default:gravel")
  14 minetest.register_alias("mapgen_desert_stone", "default:desert_stone")
  15 minetest.register_alias("mapgen_desert_sand", "default:desert_sand")
  16 minetest.register_alias("mapgen_dirt_with_snow", "default:dirt_with_snow")
  17 minetest.register_alias("mapgen_snow", "default:snow")
  18 minetest.register_alias("mapgen_snowblock", "default:snowblock")
  19 minetest.register_alias("mapgen_ice", "default:ice")
  20
  21 minetest.register_alias("mapgen_tree", "default:tree")
  22 minetest.register_alias("mapgen_leaves", "default:leaves")
  23 minetest.register_alias("mapgen_apple", "default:apple")
  24 minetest.register_alias("mapgen_jungletree", "default:jungletree")
  25 minetest.register_alias("mapgen_jungleleaves", "default:jungleleaves")
  26 minetest.register_alias("mapgen_junglegrass", "default:junglegrass")
  27 minetest.register_alias("mapgen_pinetree", "default:pinetree")
  28 minetest.register_alias("mapgen_pine_needles", "default:pine_needles")
  29
  30 minetest.register_alias("mapgen_cobble", "default:cobble")
  31 minetest.register_alias("mapgen_stair_cobble", "stairs:stair_cobble")
  32 minetest.register_alias("mapgen_mossycobble", "default:mossycobble")
  33
  34
  35 --
  36 -- Register ores
  37 --
  38
  39
  40 -- Blob ore first to avoid other ores inside blobs
  41
  42 function default.register_ores()
  43         minetest.register_ore({
  44                 ore_type         = "blob",
  45                 ore              = "default:clay",
  46                 wherein          = {"default:sand"},
  47                 clust_scarcity   = 24*24*24,
  48                 clust_size       = 7,
  49                 y_min            = -15,
  50                 y_max            = 0,
  51                 noise_threshhold = 0,
  52                 noise_params     = {
  53                         offset=0.35,
  54                         scale=0.2,
  55                         spread={x=5, y=5, z=5},
  56                         seed=-316,
  57                         octaves=1,
  58                         persist=0.5
  59                 },
  60         })
  61
  62         minetest.register_ore({
  63                 ore_type         = "blob",
  64                 ore              = "default:sand",
  65                 wherein          = {"default:stone"},
  66                 clust_scarcity   = 24*24*24,
  67                 clust_size       = 7,
  68                 y_min            = -63,
  69                 y_max            = 4,
  70                 noise_threshhold = 0,
  71                 noise_params     = {
  72                         offset=0.35,
  73                         scale=0.2,
  74                         spread={x=5, y=5, z=5},
  75                         seed=2316,
  76                         octaves=1,
  77                         persist=0.5
  78                 },
  79         })
  80
  81         minetest.register_ore({
  82                 ore_type         = "blob",
  83                 ore              = "default:dirt",
  84                 wherein          = {"default:stone"},
  85                 clust_scarcity   = 24*24*24,
  86                 clust_size       = 7,
  87                 y_min            = -63,
  88                 y_max            = 31000,
  89                 noise_threshhold = 0,
  90                 noise_params     = {
  91                         offset=0.35,
  92                         scale=0.2,
  93                         spread={x=5, y=5, z=5},
  94                         seed=17676,
  95                         octaves=1,
  96                         persist=0.5
  97                 },
  98         })
  99
 100         minetest.register_ore({
 101                 ore_type         = "blob",
 102                 ore              = "default:gravel",
 103                 wherein          = {"default:stone"},
 104                 clust_scarcity   = 24*24*24,
 105                 clust_size       = 7,
 106                 y_min            = -31000,
 107                 y_max            = 31000,
 108                 noise_threshhold = 0,
 109                 noise_params     = {
 110                         offset=0.35,
 111                         scale=0.2,
 112                         spread={x=5, y=5, z=5},
 113                         seed=766,
 114                         octaves=1,
 115                         persist=0.5
 116                 },
 117         })
 118
 119         minetest.register_ore({
 120                 ore_type       = "scatter",
 121                 ore            = "default:stone_with_coal",
 122                 wherein        = "default:stone",
 123                 clust_scarcity = 8*8*8,
 124                 clust_num_ores = 8,
 125                 clust_size     = 3,
 126                 y_min          = -31000,
 127                 y_max          = 64,
 128         })
 129
 130         minetest.register_ore({
 131                 ore_type       = "scatter",
 132                 ore            = "default:stone_with_coal",
 133                 wherein        = "default:stone",
 134                 clust_scarcity = 24*24*24,
 135                 clust_num_ores = 27,
 136                 clust_size     = 6,
 137                 y_min          = -31000,
 138                 y_max          = 0,
 139         })
 140
 141         minetest.register_ore({
 142                 ore_type       = "scatter",
 143                 ore            = "default:stone_with_iron",
 144                 wherein        = "default:stone",
 145                 clust_scarcity = 12*12*12,
 146                 clust_num_ores = 3,
 147                 clust_size     = 2,
 148                 y_min          = -15,
 149                 y_max          = 2,
 150         })
 151
 152         minetest.register_ore({
 153                 ore_type       = "scatter",
 154                 ore            = "default:stone_with_iron",
 155                 wherein        = "default:stone",
 156                 clust_scarcity = 9*9*9,
 157                 clust_num_ores = 5,
 158                 clust_size     = 3,
 159                 y_min          = -63,
 160                 y_max          = -16,
 161         })
 162
 163         minetest.register_ore({
 164                 ore_type       = "scatter",
 165                 ore            = "default:stone_with_iron",
 166                 wherein        = "default:stone",
 167                 clust_scarcity = 7*7*7,
 168                 clust_num_ores = 5,
 169                 clust_size     = 3,
 170                 y_min          = -31000,
 171                 y_max          = -64,
 172         })
 173
 174         minetest.register_ore({
 175                 ore_type       = "scatter",
 176                 ore            = "default:stone_with_iron",
 177                 wherein        = "default:stone",
 178                 clust_scarcity = 24*24*24,
 179                 clust_num_ores = 27,
 180                 clust_size     = 6,
 181                 y_min          = -31000,
 182                 y_max          = -64,
 183         })
 184
 185         minetest.register_ore({
 186                 ore_type       = "scatter",
 187                 ore            = "default:stone_with_mese",
 188                 wherein        = "default:stone",
 189                 clust_scarcity = 18*18*18,
 190                 clust_num_ores = 3,
 191                 clust_size     = 2,
 192                 y_min          = -255,
 193                 y_max          = -64,
 194         })
 195
 196         minetest.register_ore({
 197                 ore_type       = "scatter",
 198                 ore            = "default:stone_with_mese",
 199                 wherein        = "default:stone",
 200                 clust_scarcity = 14*14*14,
 201                 clust_num_ores = 5,
 202                 clust_size     = 3,
 203                 y_min          = -31000,
 204                 y_max          = -256,
 205         })
 206
 207         minetest.register_ore({
 208                 ore_type       = "scatter",
 209                 ore            = "default:mese",
 210                 wherein        = "default:stone",
 211                 clust_scarcity = 36*36*36,
 212                 clust_num_ores = 3,
 213                 clust_size     = 2,
 214                 y_min          = -31000,
 215                 y_max          = -1024,
 216         })
 217
 218         minetest.register_ore({
 219                 ore_type       = "scatter",
 220                 ore            = "default:stone_with_gold",
 221                 wherein        = "default:stone",
 222                 clust_scarcity = 15*15*15,
 223                 clust_num_ores = 3,
 224                 clust_size     = 2,
 225                 y_min          = -255,
 226                 y_max          = -64,
 227         })
 228
 229         minetest.register_ore({
 230                 ore_type       = "scatter",
 231                 ore            = "default:stone_with_gold",
 232                 wherein        = "default:stone",
 233                 clust_scarcity = 13*13*13,
 234                 clust_num_ores = 5,
 235                 clust_size     = 3,
 236                 y_min          = -31000,
 237                 y_max          = -256,
 238         })
 239
 240         minetest.register_ore({
 241                 ore_type       = "scatter",
 242                 ore            = "default:stone_with_diamond",
 243                 wherein        = "default:stone",
 244                 clust_scarcity = 17*17*17,
 245                 clust_num_ores = 4,
 246                 clust_size     = 3,
 247                 y_min          = -255,
 248                 y_max          = -128,
 249         })
 250
 251         minetest.register_ore({
 252                 ore_type       = "scatter",
 253                 ore            = "default:stone_with_diamond",
 254                 wherein        = "default:stone",
 255                 clust_scarcity = 15*15*15,
 256                 clust_num_ores = 4,
 257                 clust_size     = 3,
 258                 y_min          = -31000,
 259                 y_max          = -256,
 260         })
 261
 262         minetest.register_ore({
 263                 ore_type       = "scatter",
 264                 ore            = "default:stone_with_copper",
 265                 wherein        = "default:stone",
 266                 clust_scarcity = 12*12*12,
 267                 clust_num_ores = 4,
 268                 clust_size     = 3,
 269                 y_min          = -63,
 270                 y_max          = -16,
 271         })
 272
 273         minetest.register_ore({
 274                 ore_type       = "scatter",
 275                 ore            = "default:stone_with_copper",
 276                 wherein        = "default:stone",
 277                 clust_scarcity = 9*9*9,
 278                 clust_num_ores = 5,
 279                 clust_size     = 3,
 280                 y_min          = -31000,
 281                 y_max          = -64,
 282         })
 283 end
 284
 285
 286 --
 287 -- Register biomes
 288 --
 289
 290
 291 function default.register_biomes()
 292         minetest.clear_registered_biomes()
 293
 294         minetest.register_biome({
 295                 name = "default:grassland",
 296                 --node_dust = "",
 297                 node_top = "default:dirt_with_grass",
 298                 depth_top = 1,
 299                 node_filler = "default:dirt",
 300                 depth_filler = 1,
 301                 --node_stone = "",
 302                 --node_water_top = "",
 303                 --depth_water_top = ,
 304                 --node_water = "",
 305                 y_min = 5,
 306                 y_max = 31000,
 307                 heat_point = 50,
 308                 humidity_point = 50,
 309         })
 310
 311         minetest.register_biome({
 312                 name = "default:grassland_ocean",
 313                 --node_dust = "",
 314                 node_top = "default:sand",
 315                 depth_top = 1,
 316                 node_filler = "default:sand",
 317                 depth_filler = 2,
 318                 --node_stone = "",
 319                 --node_water_top = "",
 320                 --depth_water_top = ,
 321                 --node_water = "",
 322                 y_min = -31000,
 323                 y_max = 4,
 324                 heat_point = 50,
 325                 humidity_point = 50,
 326         })
 327 end
 328
 329
 330 --
 331 -- Register mgv6 decorations
 332 --
 333
 334
 335 function default.register_mgv6_decorations()
 336
 337         -- Papyrus
 338
 339         minetest.register_decoration({
 340                 deco_type = "simple",
 341                 place_on = {"default:dirt_with_grass"},
 342                 sidelen = 8,
 343                 noise_params = {
 344                         offset = -0.3,
 345                         scale = 0.7,
 346                         spread = {x=100, y=100, z=100},
 347                         seed = 354,
 348                         octaves = 3,
 349                         persist = 0.7
 350                 },
 351                 y_min = 1,
 352                 y_max = 1,
 353                 decoration = "default:papyrus",
 354                 height = 2,
 355                 height_max = 4,
 356                 spawn_by = "default:water_source",
 357                 num_spawn_by = 1,
 358         })
 359
 360         -- Cacti
 361
 362         minetest.register_decoration({
 363                 deco_type = "simple",
 364                 place_on = {"default:desert_sand"},
 365                 sidelen = 16,
 366                 noise_params = {
 367                         offset = -0.012,
 368                         scale = 0.024,
 369                         spread = {x=100, y=100, z=100},
 370                         seed = 230,
 371                         octaves = 3,
 372                         persist = 0.6
 373                 },
 374                 y_min = 1,
 375                 y_max = 30,
 376                 decoration = "default:cactus",
 377                 height = 3,
 378                 height_max = 4,
 379         })
 380
 381         -- Grasses
 382
 383         for length = 1, 5 do
 384                 minetest.register_decoration({
 385                         deco_type = "simple",
 386                         place_on = {"default:dirt_with_grass"},
 387                         sidelen = 16,
 388                         noise_params = {
 389                                 offset = 0,
 390                                 scale = 0.007,
 391                                 spread = {x=100, y=100, z=100},
 392                                 seed = 329,
 393                                 octaves = 3,
 394                                 persist = 0.6
 395                         },
 396                         y_min = 1,
 397                         y_max = 30,
 398                         decoration = "default:grass_"..length,
 399                 })
 400         end
 401
 402         -- Dry shrubs
 403
 404         minetest.register_decoration({
 405                 deco_type = "simple",
 406                 place_on = {"default:desert_sand", "default:dirt_with_snow"},
 407                 sidelen = 16,
 408                 noise_params = {
 409                         offset = 0,
 410                         scale = 0.035,
 411                         spread = {x=100, y=100, z=100},
 412                         seed = 329,
 413                         octaves = 3,
 414                         persist = 0.6
 415                 },
 416                 y_min = 1,
 417                 y_max = 30,
 418                 decoration = "default:dry_shrub",
 419         })
 420 end
 421
 422
 423 --
 424 -- Register decorations
 425 --
 426
 427
 428 function default.register_decorations()
 429
 430         -- Flowers
 431
 432         minetest.register_decoration({
 433                 deco_type = "simple",
 434                 place_on = {"default:dirt_with_grass"},
 435                 sidelen = 16,
 436                 noise_params = {
 437                         offset = -0.02,
 438                         scale = 0.03,
 439                         spread = {x=200, y=200, z=200},
 440                         seed = 436,
 441                         octaves = 3,
 442                         persist = 0.6
 443                 },
 444                 biomes = {"default:grassland"},
 445                 y_min = -31000,
 446                 y_max = 31000,
 447                 decoration = "flowers:rose",
 448         })
 449
 450         minetest.register_decoration({
 451                 deco_type = "simple",
 452                 place_on = {"default:dirt_with_grass"},
 453                 sidelen = 16,
 454                 noise_params = {
 455                         offset = -0.02,
 456                         scale = 0.03,
 457                         spread = {x=200, y=200, z=200},
 458                         seed = 19822,
 459                         octaves = 3,
 460                         persist = 0.6
 461                 },
 462                 biomes = {"default:grassland"},
 463                 y_min = 33,
 464                 y_max = 31000,
 465                 decoration = "flowers:tulip",
 466         })
 467
 468         minetest.register_decoration({
 469                 deco_type = "simple",
 470                 place_on = {"default:dirt_with_grass"},
 471                 sidelen = 16,
 472                 noise_params = {
 473                         offset = -0.02,
 474                         scale = 0.03,
 475                         spread = {x=200, y=200, z=200},
 476                         seed = 1220999,
 477                         octaves = 3,
 478                         persist = 0.6
 479                 },
 480                 biomes = {"default:grassland"},
 481                 y_min = -31000,
 482                 y_max = 31000,
 483                 decoration = "flowers:dandelion_yellow",
 484         })
 485
 486         minetest.register_decoration({
 487                 deco_type = "simple",
 488                 place_on = {"default:dirt_with_grass"},
 489                 sidelen = 16,
 490                 noise_params = {
 491                         offset = -0.02,
 492                         scale = 0.03,
 493                         spread = {x=200, y=200, z=200},
 494                         seed = 36662,
 495                         octaves = 3,
 496                         persist = 0.6
 497                 },
 498                 biomes = {"default:grassland"},
 499                 y_min = -31000,
 500                 y_max = 31000,
 501                 decoration = "flowers:geranium",
 502         })
 503
 504         minetest.register_decoration({
 505                 deco_type = "simple",
 506                 place_on = {"default:dirt_with_grass"},
 507                 sidelen = 16,
 508                 noise_params = {
 509                         offset = -0.02,
 510                         scale = 0.03,
 511                         spread = {x=200, y=200, z=200},
 512                         seed = 1133,
 513                         octaves = 3,
 514                         persist = 0.6
 515                 },
 516                 biomes = {"default:grassland"},
 517                 y_min = -31000,
 518                 y_max = 31000,
 519                 decoration = "flowers:viola",
 520         })
 521
 522         minetest.register_decoration({
 523                 deco_type = "simple",
 524                 place_on = {"default:dirt_with_grass"},
 525                 sidelen = 16,
 526                 noise_params = {
 527                         offset = -0.02,
 528                         scale = 0.03,
 529                         spread = {x=200, y=200, z=200},
 530                         seed = 73133,
 531                         octaves = 3,
 532                         persist = 0.6
 533                 },
 534                 biomes = {"default:grassland"},
 535                 y_min = -31000,
 536                 y_max = 31000,
 537                 decoration = "flowers:dandelion_white",
 538         })
 539
 540         -- Grasses
 541
 542         minetest.register_decoration({
 543                 deco_type = "simple",
 544                 place_on = {"default:dirt_with_grass"},
 545                 sidelen = 16,
 546                 noise_params = {
 547                         offset = 0.04,
 548                         scale = 0.04,
 549                         spread = {x=200, y=200, z=200},
 550                         seed = 66440,
 551                         octaves = 3,
 552                         persist = 0.6
 553                 },
 554                 biomes = {"default:grassland"},
 555                 y_min = -31000,
 556                 y_max = 31000,
 557                 decoration = "default:grass_1",
 558         })
 559
 560         minetest.register_decoration({
 561                 deco_type = "simple",
 562                 place_on = {"default:dirt_with_grass"},
 563                 sidelen = 16,
 564                 noise_params = {
 565                         offset = 0.02,
 566                         scale = 0.06,
 567                         spread = {x=200, y=200, z=200},
 568                         seed = 66440,
 569                         octaves = 3,
 570                         persist = 0.6
 571                 },
 572                 biomes = {"default:grassland"},
 573                 y_min = -31000,
 574                 y_max = 31000,
 575                 decoration = "default:grass_2",
 576         })
 577
 578         minetest.register_decoration({
 579                 deco_type = "simple",
 580                 place_on = {"default:dirt_with_grass"},
 581                 sidelen = 16,
 582                 noise_params = {
 583                         offset = 0,
 584                         scale = 0.08,
 585                         spread = {x=200, y=200, z=200},
 586                         seed = 66440,
 587                         octaves = 3,
 588                         persist = 0.6
 589                 },
 590                 biomes = {"default:grassland"},
 591                 y_min = -31000,
 592                 y_max = 31000,
 593                 decoration = "default:grass_3",
 594         })
 595
 596         minetest.register_decoration({
 597                 deco_type = "simple",
 598                 place_on = {"default:dirt_with_grass"},
 599                 sidelen = 16,
 600                 noise_params = {
 601                         offset = -0.02,
 602                         scale = 0.10,
 603                         spread = {x=200, y=200, z=200},
 604                         seed = 66440,
 605                         octaves = 3,
 606                         persist = 0.6
 607                 },
 608                 biomes = {"default:grassland"},
 609                 y_min = -31000,
 610                 y_max = 31000,
 611                 decoration = "default:grass_4",
 612         })
 613
 614         minetest.register_decoration({
 615                 deco_type = "simple",
 616                 place_on = {"default:dirt_with_grass"},
 617                 sidelen = 16,
 618                 noise_params = {
 619                         offset = -0.04,
 620                         scale = 0.12,
 621                         spread = {x=200, y=200, z=200},
 622                         seed = 66440,
 623                         octaves = 3,
 624                         persist = 0.6
 625                 },
 626                 biomes = {"default:grassland"},
 627                 y_min = -31000,
 628                 y_max = 31000,
 629                 decoration = "default:grass_5",
 630         })
 631 end
 632
 633
 634 --
 635 -- Detect mapgen to select functions
 636 --
 637
 638
 639 -- Mods using singlenode mapgen can call these functions to enable
 640 -- the use of minetest.generate_ores or minetest.generate_decorations
 641
 642 local mg_params = minetest.get_mapgen_params()
 643 if mg_params.mgname == "v6" then
 644         default.register_ores()
 645         default.register_mgv6_decorations()
 646 elseif mg_params.mgname ~= "singlenode" then
 647         default.register_ores()
 648         default.register_biomes()
 649         default.register_decorations()
 650 end
 651
 652
 653 --
 654 -- Generate nyan cats in all mapgens
 655 --
 656
 657
 658 -- facedir: 0/1/2/3 (head node facedir value)
 659 -- length: length of rainbow tail
 660 function default.make_nyancat(pos, facedir, length)
 661         local tailvec = {x=0, y=0, z=0}
 662         if facedir == 0 then
 663                 tailvec.z = 1
 664         elseif facedir == 1 then
 665                 tailvec.x = 1
 666         elseif facedir == 2 then
 667                 tailvec.z = -1
 668         elseif facedir == 3 then
 669                 tailvec.x = -1
 670         else
 671                 --print("default.make_nyancat(): Invalid facedir: "+dump(facedir))
 672                 facedir = 0
 673                 tailvec.z = 1
 674         end
 675         local p = {x=pos.x, y=pos.y, z=pos.z}
 676         minetest.set_node(p, {name="default:nyancat", param2=facedir})
 677         for i=1,length do
 678                 p.x = p.x + tailvec.x
 679                 p.z = p.z + tailvec.z
 680                 minetest.set_node(p, {name="default:nyancat_rainbow", param2=facedir})
 681         end
 682 end
 683
 684
 685 function default.generate_nyancats(minp, maxp, seed)
 686         local height_min = -31000
 687         local height_max = -32
 688         if maxp.y < height_min or minp.y > height_max then
 689                 return
 690         end
 691         local y_min = math.max(minp.y, height_min)
 692         local y_max = math.min(maxp.y, height_max)
 693         local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
 694         local pr = PseudoRandom(seed + 9324342)
 695         local max_num_nyancats = math.floor(volume / (16*16*16))
 696         for i=1,max_num_nyancats do
 697                 if pr:next(0, 1000) == 0 then
 698                         local x0 = pr:next(minp.x, maxp.x)
 699                         local y0 = pr:next(minp.y, maxp.y)
 700                         local z0 = pr:next(minp.z, maxp.z)
 701                         local p0 = {x=x0, y=y0, z=z0}
 702                         default.make_nyancat(p0, pr:next(0,3), pr:next(3,15))
 703                 end
 704         end
 705 end
 706
 707
 708 minetest.register_on_generated(default.generate_nyancats)
 709
 710
 711 --
 712 -- Deprecated ore generation code
 713 --
 714
 715
 716 function default.generate_ore(name, wherein, minp, maxp, seed,
 717                 chunks_per_volume, chunk_size, ore_per_chunk, height_min, height_max)
 718         minetest.log('action', "WARNING: default.generate_ore is deprecated")
 719
 720         if maxp.y < height_min or minp.y > height_max then
 721                 return
 722         end
 723         local y_min = math.max(minp.y, height_min)
 724         local y_max = math.min(maxp.y, height_max)
 725         if chunk_size >= y_max - y_min + 1 then
 726                 return
 727         end
 728         local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
 729         local pr = PseudoRandom(seed)
 730         local num_chunks = math.floor(chunks_per_volume * volume)
 731         local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
 732         --print("generate_ore num_chunks: "..dump(num_chunks))
 733         for i=1,num_chunks do
 734                 local y0 = pr:next(y_min, y_max-chunk_size+1)
 735                 if y0 >= height_min and y0 <= height_max then
 736                         local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
 737                         local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
 738                         local p0 = {x=x0, y=y0, z=z0}
 739                         for x1=0,chunk_size-1 do
 740                         for y1=0,chunk_size-1 do
 741                         for z1=0,chunk_size-1 do
 742                                 if pr:next(1,inverse_chance) == 1 then
 743                                         local x2 = x0+x1
 744                                         local y2 = y0+y1
 745                                         local z2 = z0+z1
 746                                         local p2 = {x=x2, y=y2, z=z2}
 747                                         if minetest.get_node(p2).name == wherein then
 748                                                 minetest.set_node(p2, {name=name})
 749                                         end
 750                                 end
 751                         end
 752                         end
 753                         end
 754                 end
 755         end
 756         --print("generate_ore done")
 757 end
 758