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_lava_source", "default:lava_source")
  12 minetest.register_alias("mapgen_gravel", "default:gravel")
  13 minetest.register_alias("mapgen_desert_stone", "default:desert_stone")
  14 minetest.register_alias("mapgen_desert_sand", "default:desert_sand")
  15 minetest.register_alias("mapgen_dirt_with_snow", "default:dirt_with_snow")
  16 minetest.register_alias("mapgen_snow", "default:snow")
  17 minetest.register_alias("mapgen_snowblock", "default:snowblock")
  18 minetest.register_alias("mapgen_ice", "default:ice")
  19
  20 minetest.register_alias("mapgen_tree", "default:tree")
  21 minetest.register_alias("mapgen_leaves", "default:leaves")
  22 minetest.register_alias("mapgen_apple", "default:apple")
  23 minetest.register_alias("mapgen_jungletree", "default:jungletree")
  24 minetest.register_alias("mapgen_jungleleaves", "default:jungleleaves")
  25 minetest.register_alias("mapgen_junglegrass", "default:junglegrass")
  26 minetest.register_alias("mapgen_pinetree", "default:pinetree")
  27 minetest.register_alias("mapgen_pine_needles", "default:pine_needles")
  28
  29 minetest.register_alias("mapgen_cobble", "default:cobble")
  30 minetest.register_alias("mapgen_stair_cobble", "stairs:stair_cobble")
  31 minetest.register_alias("mapgen_mossycobble", "default:mossycobble")
  32
  33
  34 --
  35 -- Register ores
  36 --
  37
  38
  39 -- Blob ore first to avoid other ores inside blobs
  40
  41 function default.register_ores()
  42         minetest.register_ore({
  43                 ore_type         = "blob",
  44                 ore              = "default:clay",
  45                 wherein          = {"default:sand"},
  46                 clust_scarcity   = 24*24*24,
  47                 clust_size       = 7,
  48                 y_min            = -15,
  49                 y_max            = 0,
  50                 noise_threshhold = 0,
  51                 noise_params     = {
  52                         offset=0.35,
  53                         scale=0.2,
  54                         spread={x=5, y=5, z=5},
  55                         seed=-316,
  56                         octaves=1,
  57                         persist=0.5
  58                 },
  59         })
  60
  61         minetest.register_ore({
  62                 ore_type         = "blob",
  63                 ore              = "default:sand",
  64                 wherein          = {"default:stone"},
  65                 clust_scarcity   = 24*24*24,
  66                 clust_size       = 7,
  67                 y_min            = -63,
  68                 y_max            = 4,
  69                 noise_threshhold = 0,
  70                 noise_params     = {
  71                         offset=0.35,
  72                         scale=0.2,
  73                         spread={x=5, y=5, z=5},
  74                         seed=2316,
  75                         octaves=1,
  76                         persist=0.5
  77                 },
  78         })
  79
  80         minetest.register_ore({
  81                 ore_type         = "blob",
  82                 ore              = "default:dirt",
  83                 wherein          = {"default:stone"},
  84                 clust_scarcity   = 24*24*24,
  85                 clust_size       = 7,
  86                 y_min            = -63,
  87                 y_max            = 31000,
  88                 noise_threshhold = 0,
  89                 noise_params     = {
  90                         offset=0.35,
  91                         scale=0.2,
  92                         spread={x=5, y=5, z=5},
  93                         seed=17676,
  94                         octaves=1,
  95                         persist=0.5
  96                 },
  97         })
  98
  99         minetest.register_ore({
 100                 ore_type         = "blob",
 101                 ore              = "default:gravel",
 102                 wherein          = {"default:stone"},
 103                 clust_scarcity   = 24*24*24,
 104                 clust_size       = 7,
 105                 y_min            = -31000,
 106                 y_max            = 31000,
 107                 noise_threshhold = 0,
 108                 noise_params     = {
 109                         offset=0.35,
 110                         scale=0.2,
 111                         spread={x=5, y=5, z=5},
 112                         seed=766,
 113                         octaves=1,
 114                         persist=0.5
 115                 },
 116         })
 117
 118         minetest.register_ore({
 119                 ore_type       = "scatter",
 120                 ore            = "default:stone_with_coal",
 121                 wherein        = "default:stone",
 122                 clust_scarcity = 8*8*8,
 123                 clust_num_ores = 8,
 124                 clust_size     = 3,
 125                 y_min          = -31000,
 126                 y_max          = 64,
 127         })
 128
 129         minetest.register_ore({
 130                 ore_type       = "scatter",
 131                 ore            = "default:stone_with_coal",
 132                 wherein        = "default:stone",
 133                 clust_scarcity = 24*24*24,
 134                 clust_num_ores = 27,
 135                 clust_size     = 6,
 136                 y_min          = -31000,
 137                 y_max          = 0,
 138         })
 139
 140         minetest.register_ore({
 141                 ore_type       = "scatter",
 142                 ore            = "default:stone_with_iron",
 143                 wherein        = "default:stone",
 144                 clust_scarcity = 12*12*12,
 145                 clust_num_ores = 3,
 146                 clust_size     = 2,
 147                 y_min          = -15,
 148                 y_max          = 2,
 149         })
 150
 151         minetest.register_ore({
 152                 ore_type       = "scatter",
 153                 ore            = "default:stone_with_iron",
 154                 wherein        = "default:stone",
 155                 clust_scarcity = 9*9*9,
 156                 clust_num_ores = 5,
 157                 clust_size     = 3,
 158                 y_min          = -63,
 159                 y_max          = -16,
 160         })
 161
 162         minetest.register_ore({
 163                 ore_type       = "scatter",
 164                 ore            = "default:stone_with_iron",
 165                 wherein        = "default:stone",
 166                 clust_scarcity = 7*7*7,
 167                 clust_num_ores = 5,
 168                 clust_size     = 3,
 169                 y_min          = -31000,
 170                 y_max          = -64,
 171         })
 172
 173         minetest.register_ore({
 174                 ore_type       = "scatter",
 175                 ore            = "default:stone_with_iron",
 176                 wherein        = "default:stone",
 177                 clust_scarcity = 24*24*24,
 178                 clust_num_ores = 27,
 179                 clust_size     = 6,
 180                 y_min          = -31000,
 181                 y_max          = -64,
 182         })
 183
 184         minetest.register_ore({
 185                 ore_type       = "scatter",
 186                 ore            = "default:stone_with_mese",
 187                 wherein        = "default:stone",
 188                 clust_scarcity = 18*18*18,
 189                 clust_num_ores = 3,
 190                 clust_size     = 2,
 191                 y_min          = -255,
 192                 y_max          = -64,
 193         })
 194
 195         minetest.register_ore({
 196                 ore_type       = "scatter",
 197                 ore            = "default:stone_with_mese",
 198                 wherein        = "default:stone",
 199                 clust_scarcity = 14*14*14,
 200                 clust_num_ores = 5,
 201                 clust_size     = 3,
 202                 y_min          = -31000,
 203                 y_max          = -256,
 204         })
 205
 206         minetest.register_ore({
 207                 ore_type       = "scatter",
 208                 ore            = "default:mese",
 209                 wherein        = "default:stone",
 210                 clust_scarcity = 36*36*36,
 211                 clust_num_ores = 3,
 212                 clust_size     = 2,
 213                 y_min          = -31000,
 214                 y_max          = -1024,
 215         })
 216
 217         minetest.register_ore({
 218                 ore_type       = "scatter",
 219                 ore            = "default:stone_with_gold",
 220                 wherein        = "default:stone",
 221                 clust_scarcity = 15*15*15,
 222                 clust_num_ores = 3,
 223                 clust_size     = 2,
 224                 y_min          = -255,
 225                 y_max          = -64,
 226         })
 227
 228         minetest.register_ore({
 229                 ore_type       = "scatter",
 230                 ore            = "default:stone_with_gold",
 231                 wherein        = "default:stone",
 232                 clust_scarcity = 13*13*13,
 233                 clust_num_ores = 5,
 234                 clust_size     = 3,
 235                 y_min          = -31000,
 236                 y_max          = -256,
 237         })
 238
 239         minetest.register_ore({
 240                 ore_type       = "scatter",
 241                 ore            = "default:stone_with_diamond",
 242                 wherein        = "default:stone",
 243                 clust_scarcity = 17*17*17,
 244                 clust_num_ores = 4,
 245                 clust_size     = 3,
 246                 y_min          = -255,
 247                 y_max          = -128,
 248         })
 249
 250         minetest.register_ore({
 251                 ore_type       = "scatter",
 252                 ore            = "default:stone_with_diamond",
 253                 wherein        = "default:stone",
 254                 clust_scarcity = 15*15*15,
 255                 clust_num_ores = 4,
 256                 clust_size     = 3,
 257                 y_min          = -31000,
 258                 y_max          = -256,
 259         })
 260
 261         minetest.register_ore({
 262                 ore_type       = "scatter",
 263                 ore            = "default:stone_with_copper",
 264                 wherein        = "default:stone",
 265                 clust_scarcity = 12*12*12,
 266                 clust_num_ores = 4,
 267                 clust_size     = 3,
 268                 y_min          = -63,
 269                 y_max          = -16,
 270         })
 271
 272         minetest.register_ore({
 273                 ore_type       = "scatter",
 274                 ore            = "default:stone_with_copper",
 275                 wherein        = "default:stone",
 276                 clust_scarcity = 9*9*9,
 277                 clust_num_ores = 5,
 278                 clust_size     = 3,
 279                 y_min          = -31000,
 280                 y_max          = -64,
 281         })
 282 end
 283
 284
 285 --
 286 -- Register biomes
 287 --
 288
 289
 290 function default.register_biomes()
 291         minetest.clear_registered_biomes()
 292
 293         minetest.register_biome({
 294                 name = "default:grassland",
 295                 --node_dust = "",
 296                 node_top = "default:dirt_with_grass",
 297                 depth_top = 1,
 298                 node_filler = "default:dirt",
 299                 depth_filler = 1,
 300                 --node_stone = "",
 301                 --node_water_top = "",
 302                 --depth_water_top = ,
 303                 --node_water = "",
 304                 y_min = 5,
 305                 y_max = 31000,
 306                 heat_point = 50,
 307                 humidity_point = 50,
 308         })
 309
 310         minetest.register_biome({
 311                 name = "default:grassland_ocean",
 312                 --node_dust = "",
 313                 node_top = "default:sand",
 314                 depth_top = 1,
 315                 node_filler = "default:sand",
 316                 depth_filler = 2,
 317                 --node_stone = "",
 318                 --node_water_top = "",
 319                 --depth_water_top = ,
 320                 --node_water = "",
 321                 y_min = -31000,
 322                 y_max = 4,
 323                 heat_point = 50,
 324                 humidity_point = 50,
 325         })
 326 end
 327
 328
 329 --
 330 -- Register mgv6 decorations
 331 --
 332
 333
 334 function default.register_mgv6_decorations()
 335
 336         -- Papyrus
 337
 338         minetest.register_decoration({
 339                 deco_type = "simple",
 340                 place_on = {"default:dirt_with_grass"},
 341                 sidelen = 8,
 342                 noise_params = {
 343                         offset = -0.3,
 344                         scale = 0.7,
 345                         spread = {x=100, y=100, z=100},
 346                         seed = 354,
 347                         octaves = 3,
 348                         persist = 0.7
 349                 },
 350                 y_min = 1,
 351                 y_max = 1,
 352                 decoration = "default:papyrus",
 353                 height = 2,
 354                 height_max = 4,
 355                 spawn_by = "default:water_source",
 356                 num_spawn_by = 1,
 357         })
 358
 359         -- Cacti
 360
 361         minetest.register_decoration({
 362                 deco_type = "simple",
 363                 place_on = {"default:desert_sand"},
 364                 sidelen = 16,
 365                 noise_params = {
 366                         offset = -0.012,
 367                         scale = 0.024,
 368                         spread = {x=100, y=100, z=100},
 369                         seed = 230,
 370                         octaves = 3,
 371                         persist = 0.6
 372                 },
 373                 y_min = 1,
 374                 y_max = 30,
 375                 decoration = "default:cactus",
 376                 height = 3,
 377                 height_max = 4,
 378         })
 379
 380         -- Grasses
 381
 382         for length = 1, 5 do
 383                 minetest.register_decoration({
 384                         deco_type = "simple",
 385                         place_on = {"default:dirt_with_grass"},
 386                         sidelen = 16,
 387                         noise_params = {
 388                                 offset = 0,
 389                                 scale = 0.007,
 390                                 spread = {x=100, y=100, z=100},
 391                                 seed = 329,
 392                                 octaves = 3,
 393                                 persist = 0.6
 394                         },
 395                         y_min = 1,
 396                         y_max = 30,
 397                         decoration = "default:grass_"..length,
 398                 })
 399         end
 400
 401         -- Dry shrubs
 402
 403         minetest.register_decoration({
 404                 deco_type = "simple",
 405                 place_on = {"default:desert_sand"},
 406                 sidelen = 16,
 407                 noise_params = {
 408                         offset = 0,
 409                         scale = 0.035,
 410                         spread = {x=100, y=100, z=100},
 411                         seed = 329,
 412                         octaves = 3,
 413                         persist = 0.6
 414                 },
 415                 y_min = 1,
 416                 y_max = 30,
 417                 decoration = "default:dry_shrub",
 418         })
 419 end
 420
 421
 422 --
 423 -- Register decorations
 424 --
 425
 426
 427 function default.register_decorations()
 428
 429         -- Flowers
 430
 431         minetest.register_decoration({
 432                 deco_type = "simple",
 433                 place_on = {"default:dirt_with_grass"},
 434                 sidelen = 16,
 435                 noise_params = {
 436                         offset = -0.02,
 437                         scale = 0.03,
 438                         spread = {x=200, y=200, z=200},
 439                         seed = 436,
 440                         octaves = 3,
 441                         persist = 0.6
 442                 },
 443                 biomes = {"default:grassland"},
 444                 y_min = -31000,
 445                 y_max = 31000,
 446                 decoration = "flowers:rose",
 447         })
 448
 449         minetest.register_decoration({
 450                 deco_type = "simple",
 451                 place_on = {"default:dirt_with_grass"},
 452                 sidelen = 16,
 453                 noise_params = {
 454                         offset = -0.02,
 455                         scale = 0.03,
 456                         spread = {x=200, y=200, z=200},
 457                         seed = 19822,
 458                         octaves = 3,
 459                         persist = 0.6
 460                 },
 461                 biomes = {"default:grassland"},
 462                 y_min = 33,
 463                 y_max = 31000,
 464                 decoration = "flowers:tulip",
 465         })
 466
 467         minetest.register_decoration({
 468                 deco_type = "simple",
 469                 place_on = {"default:dirt_with_grass"},
 470                 sidelen = 16,
 471                 noise_params = {
 472                         offset = -0.02,
 473                         scale = 0.03,
 474                         spread = {x=200, y=200, z=200},
 475                         seed = 1220999,
 476                         octaves = 3,
 477                         persist = 0.6
 478                 },
 479                 biomes = {"default:grassland"},
 480                 y_min = -31000,
 481                 y_max = 31000,
 482                 decoration = "flowers:dandelion_yellow",
 483         })
 484
 485         minetest.register_decoration({
 486                 deco_type = "simple",
 487                 place_on = {"default:dirt_with_grass"},
 488                 sidelen = 16,
 489                 noise_params = {
 490                         offset = -0.02,
 491                         scale = 0.03,
 492                         spread = {x=200, y=200, z=200},
 493                         seed = 36662,
 494                         octaves = 3,
 495                         persist = 0.6
 496                 },
 497                 biomes = {"default:grassland"},
 498                 y_min = -31000,
 499                 y_max = 31000,
 500                 decoration = "flowers:geranium",
 501         })
 502
 503         minetest.register_decoration({
 504                 deco_type = "simple",
 505                 place_on = {"default:dirt_with_grass"},
 506                 sidelen = 16,
 507                 noise_params = {
 508                         offset = -0.02,
 509                         scale = 0.03,
 510                         spread = {x=200, y=200, z=200},
 511                         seed = 1133,
 512                         octaves = 3,
 513                         persist = 0.6
 514                 },
 515                 biomes = {"default:grassland"},
 516                 y_min = -31000,
 517                 y_max = 31000,
 518                 decoration = "flowers:viola",
 519         })
 520
 521         minetest.register_decoration({
 522                 deco_type = "simple",
 523                 place_on = {"default:dirt_with_grass"},
 524                 sidelen = 16,
 525                 noise_params = {
 526                         offset = -0.02,
 527                         scale = 0.03,
 528                         spread = {x=200, y=200, z=200},
 529                         seed = 73133,
 530                         octaves = 3,
 531                         persist = 0.6
 532                 },
 533                 biomes = {"default:grassland"},
 534                 y_min = -31000,
 535                 y_max = 31000,
 536                 decoration = "flowers:dandelion_white",
 537         })
 538
 539         -- Grasses
 540
 541         minetest.register_decoration({
 542                 deco_type = "simple",
 543                 place_on = {"default:dirt_with_grass"},
 544                 sidelen = 16,
 545                 noise_params = {
 546                         offset = 0.04,
 547                         scale = 0.04,
 548                         spread = {x=200, y=200, z=200},
 549                         seed = 66440,
 550                         octaves = 3,
 551                         persist = 0.6
 552                 },
 553                 biomes = {"default:grassland"},
 554                 y_min = -31000,
 555                 y_max = 31000,
 556                 decoration = "default:grass_1",
 557         })
 558
 559         minetest.register_decoration({
 560                 deco_type = "simple",
 561                 place_on = {"default:dirt_with_grass"},
 562                 sidelen = 16,
 563                 noise_params = {
 564                         offset = 0.02,
 565                         scale = 0.06,
 566                         spread = {x=200, y=200, z=200},
 567                         seed = 66440,
 568                         octaves = 3,
 569                         persist = 0.6
 570                 },
 571                 biomes = {"default:grassland"},
 572                 y_min = -31000,
 573                 y_max = 31000,
 574                 decoration = "default:grass_2",
 575         })
 576
 577         minetest.register_decoration({
 578                 deco_type = "simple",
 579                 place_on = {"default:dirt_with_grass"},
 580                 sidelen = 16,
 581                 noise_params = {
 582                         offset = 0,
 583                         scale = 0.08,
 584                         spread = {x=200, y=200, z=200},
 585                         seed = 66440,
 586                         octaves = 3,
 587                         persist = 0.6
 588                 },
 589                 biomes = {"default:grassland"},
 590                 y_min = -31000,
 591                 y_max = 31000,
 592                 decoration = "default:grass_3",
 593         })
 594
 595         minetest.register_decoration({
 596                 deco_type = "simple",
 597                 place_on = {"default:dirt_with_grass"},
 598                 sidelen = 16,
 599                 noise_params = {
 600                         offset = -0.02,
 601                         scale = 0.10,
 602                         spread = {x=200, y=200, z=200},
 603                         seed = 66440,
 604                         octaves = 3,
 605                         persist = 0.6
 606                 },
 607                 biomes = {"default:grassland"},
 608                 y_min = -31000,
 609                 y_max = 31000,
 610                 decoration = "default:grass_4",
 611         })
 612
 613         minetest.register_decoration({
 614                 deco_type = "simple",
 615                 place_on = {"default:dirt_with_grass"},
 616                 sidelen = 16,
 617                 noise_params = {
 618                         offset = -0.04,
 619                         scale = 0.12,
 620                         spread = {x=200, y=200, z=200},
 621                         seed = 66440,
 622                         octaves = 3,
 623                         persist = 0.6
 624                 },
 625                 biomes = {"default:grassland"},
 626                 y_min = -31000,
 627                 y_max = 31000,
 628                 decoration = "default:grass_5",
 629         })
 630 end
 631
 632
 633 --
 634 -- Detect mapgen to select functions
 635 --
 636
 637
 638 -- Mods using singlenode mapgen can call these functions to enable
 639 -- the use of minetest.generate_ores or minetest.generate_decorations
 640
 641 local mg_params = minetest.get_mapgen_params()
 642 if mg_params.mgname == "v5" then
 643         default.register_ores()
 644         default.register_biomes()
 645         default.register_decorations()
 646 elseif mg_params.mgname == "v6" then
 647         default.register_ores()
 648         default.register_mgv6_decorations()
 649 elseif mg_params.mgname == "v7" then
 650         default.register_ores()
 651         default.register_biomes()
 652         default.register_decorations()
 653 end
 654
 655
 656 --
 657 -- Generate nyan cats in all mapgens
 658 --
 659
 660
 661 -- facedir: 0/1/2/3 (head node facedir value)
 662 -- length: length of rainbow tail
 663 function default.make_nyancat(pos, facedir, length)
 664         local tailvec = {x=0, y=0, z=0}
 665         if facedir == 0 then
 666                 tailvec.z = 1
 667         elseif facedir == 1 then
 668                 tailvec.x = 1
 669         elseif facedir == 2 then
 670                 tailvec.z = -1
 671         elseif facedir == 3 then
 672                 tailvec.x = -1
 673         else
 674                 --print("default.make_nyancat(): Invalid facedir: "+dump(facedir))
 675                 facedir = 0
 676                 tailvec.z = 1
 677         end
 678         local p = {x=pos.x, y=pos.y, z=pos.z}
 679         minetest.set_node(p, {name="default:nyancat", param2=facedir})
 680         for i=1,length do
 681                 p.x = p.x + tailvec.x
 682                 p.z = p.z + tailvec.z
 683                 minetest.set_node(p, {name="default:nyancat_rainbow", param2=facedir})
 684         end
 685 end
 686
 687
 688 function default.generate_nyancats(minp, maxp, seed)
 689         local height_min = -31000
 690         local height_max = -32
 691         if maxp.y < height_min or minp.y > height_max then
 692                 return
 693         end
 694         local y_min = math.max(minp.y, height_min)
 695         local y_max = math.min(maxp.y, height_max)
 696         local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
 697         local pr = PseudoRandom(seed + 9324342)
 698         local max_num_nyancats = math.floor(volume / (16*16*16))
 699         for i=1,max_num_nyancats do
 700                 if pr:next(0, 1000) == 0 then
 701                         local x0 = pr:next(minp.x, maxp.x)
 702                         local y0 = pr:next(minp.y, maxp.y)
 703                         local z0 = pr:next(minp.z, maxp.z)
 704                         local p0 = {x=x0, y=y0, z=z0}
 705                         default.make_nyancat(p0, pr:next(0,3), pr:next(3,15))
 706                 end
 707         end
 708 end
 709
 710
 711 minetest.register_on_generated(default.generate_nyancats)
 712
 713
 714 --
 715 -- Deprecated ore generation code
 716 --
 717
 718
 719 function default.generate_ore(name, wherein, minp, maxp, seed,
 720                 chunks_per_volume, chunk_size, ore_per_chunk, height_min, height_max)
 721         minetest.log('action', "WARNING: default.generate_ore is deprecated")
 722
 723         if maxp.y < height_min or minp.y > height_max then
 724                 return
 725         end
 726         local y_min = math.max(minp.y, height_min)
 727         local y_max = math.min(maxp.y, height_max)
 728         if chunk_size >= y_max - y_min + 1 then
 729                 return
 730         end
 731         local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
 732         local pr = PseudoRandom(seed)
 733         local num_chunks = math.floor(chunks_per_volume * volume)
 734         local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
 735         --print("generate_ore num_chunks: "..dump(num_chunks))
 736         for i=1,num_chunks do
 737                 local y0 = pr:next(y_min, y_max-chunk_size+1)
 738                 if y0 >= height_min and y0 <= height_max then
 739                         local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
 740                         local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
 741                         local p0 = {x=x0, y=y0, z=z0}
 742                         for x1=0,chunk_size-1 do
 743                         for y1=0,chunk_size-1 do
 744                         for z1=0,chunk_size-1 do
 745                                 if pr:next(1,inverse_chance) == 1 then
 746                                         local x2 = x0+x1
 747                                         local y2 = y0+y1
 748                                         local z2 = z0+z1
 749                                         local p2 = {x=x2, y=y2, z=z2}
 750                                         if minetest.get_node(p2).name == wherein then
 751                                                 minetest.set_node(p2, {name=name})
 752                                         end
 753                                 end
 754                         end
 755                         end
 756                         end
 757                 end
 758         end
 759         --print("generate_ore done")
 760 end
 761