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         })
 357
 358         -- Cacti
 359
 360         minetest.register_decoration({
 361                 deco_type = "simple",
 362                 place_on = {"default:desert_sand"},
 363                 sidelen = 16,
 364                 noise_params = {
 365                         offset = -0.012,
 366                         scale = 0.024,
 367                         spread = {x=100, y=100, z=100},
 368                         seed = 230,
 369                         octaves = 3,
 370                         persist = 0.6
 371                 },
 372                 y_min = 1,
 373                 y_max = 30,
 374                 decoration = "default:cactus",
 375                 height = 3,
 376                 height_max = 4,
 377         })
 378
 379         -- Grasses
 380
 381         for length = 1, 5 do
 382                 minetest.register_decoration({
 383                         deco_type = "simple",
 384                         place_on = {"default:dirt_with_grass"},
 385                         sidelen = 16,
 386                         noise_params = {
 387                                 offset = 0,
 388                                 scale = 0.007,
 389                                 spread = {x=100, y=100, z=100},
 390                                 seed = 329,
 391                                 octaves = 3,
 392                                 persist = 0.6
 393                         },
 394                         y_min = 1,
 395                         y_max = 30,
 396                         decoration = "default:grass_"..length,
 397                 })
 398         end
 399
 400         -- Dry shrubs
 401
 402         minetest.register_decoration({
 403                 deco_type = "simple",
 404                 place_on = {"default:desert_sand"},
 405                 sidelen = 16,
 406                 noise_params = {
 407                         offset = 0,
 408                         scale = 0.035,
 409                         spread = {x=100, y=100, z=100},
 410                         seed = 329,
 411                         octaves = 3,
 412                         persist = 0.6
 413                 },
 414                 y_min = 1,
 415                 y_max = 30,
 416                 decoration = "default:dry_shrub",
 417         })
 418 end
 419
 420
 421 --
 422 -- Register decorations
 423 --
 424
 425
 426 function default.register_decorations()
 427
 428         -- Flowers
 429
 430         minetest.register_decoration({
 431                 deco_type = "simple",
 432                 place_on = {"default:dirt_with_grass"},
 433                 sidelen = 16,
 434                 noise_params = {
 435                         offset = -0.02,
 436                         scale = 0.03,
 437                         spread = {x=200, y=200, z=200},
 438                         seed = 436,
 439                         octaves = 3,
 440                         persist = 0.6
 441                 },
 442                 biomes = {"default:grassland"},
 443                 y_min = -31000,
 444                 y_max = 31000,
 445                 decoration = "flowers:rose",
 446         })
 447
 448         minetest.register_decoration({
 449                 deco_type = "simple",
 450                 place_on = {"default:dirt_with_grass"},
 451                 sidelen = 16,
 452                 noise_params = {
 453                         offset = -0.02,
 454                         scale = 0.03,
 455                         spread = {x=200, y=200, z=200},
 456                         seed = 19822,
 457                         octaves = 3,
 458                         persist = 0.6
 459                 },
 460                 biomes = {"default:grassland"},
 461                 y_min = 33,
 462                 y_max = 31000,
 463                 decoration = "flowers:tulip",
 464         })
 465
 466         minetest.register_decoration({
 467                 deco_type = "simple",
 468                 place_on = {"default:dirt_with_grass"},
 469                 sidelen = 16,
 470                 noise_params = {
 471                         offset = -0.02,
 472                         scale = 0.03,
 473                         spread = {x=200, y=200, z=200},
 474                         seed = 1220999,
 475                         octaves = 3,
 476                         persist = 0.6
 477                 },
 478                 biomes = {"default:grassland"},
 479                 y_min = -31000,
 480                 y_max = 31000,
 481                 decoration = "flowers:dandelion_yellow",
 482         })
 483
 484         minetest.register_decoration({
 485                 deco_type = "simple",
 486                 place_on = {"default:dirt_with_grass"},
 487                 sidelen = 16,
 488                 noise_params = {
 489                         offset = -0.02,
 490                         scale = 0.03,
 491                         spread = {x=200, y=200, z=200},
 492                         seed = 36662,
 493                         octaves = 3,
 494                         persist = 0.6
 495                 },
 496                 biomes = {"default:grassland"},
 497                 y_min = -31000,
 498                 y_max = 31000,
 499                 decoration = "flowers:geranium",
 500         })
 501
 502         minetest.register_decoration({
 503                 deco_type = "simple",
 504                 place_on = {"default:dirt_with_grass"},
 505                 sidelen = 16,
 506                 noise_params = {
 507                         offset = -0.02,
 508                         scale = 0.03,
 509                         spread = {x=200, y=200, z=200},
 510                         seed = 1133,
 511                         octaves = 3,
 512                         persist = 0.6
 513                 },
 514                 biomes = {"default:grassland"},
 515                 y_min = -31000,
 516                 y_max = 31000,
 517                 decoration = "flowers:viola",
 518         })
 519
 520         minetest.register_decoration({
 521                 deco_type = "simple",
 522                 place_on = {"default:dirt_with_grass"},
 523                 sidelen = 16,
 524                 noise_params = {
 525                         offset = -0.02,
 526                         scale = 0.03,
 527                         spread = {x=200, y=200, z=200},
 528                         seed = 73133,
 529                         octaves = 3,
 530                         persist = 0.6
 531                 },
 532                 biomes = {"default:grassland"},
 533                 y_min = -31000,
 534                 y_max = 31000,
 535                 decoration = "flowers:dandelion_white",
 536         })
 537
 538         -- Grasses
 539
 540         minetest.register_decoration({
 541                 deco_type = "simple",
 542                 place_on = {"default:dirt_with_grass"},
 543                 sidelen = 16,
 544                 noise_params = {
 545                         offset = 0.04,
 546                         scale = 0.04,
 547                         spread = {x=200, y=200, z=200},
 548                         seed = 66440,
 549                         octaves = 3,
 550                         persist = 0.6
 551                 },
 552                 biomes = {"default:grassland"},
 553                 y_min = -31000,
 554                 y_max = 31000,
 555                 decoration = "default:grass_1",
 556         })
 557
 558         minetest.register_decoration({
 559                 deco_type = "simple",
 560                 place_on = {"default:dirt_with_grass"},
 561                 sidelen = 16,
 562                 noise_params = {
 563                         offset = 0.02,
 564                         scale = 0.06,
 565                         spread = {x=200, y=200, z=200},
 566                         seed = 66440,
 567                         octaves = 3,
 568                         persist = 0.6
 569                 },
 570                 biomes = {"default:grassland"},
 571                 y_min = -31000,
 572                 y_max = 31000,
 573                 decoration = "default:grass_2",
 574         })
 575
 576         minetest.register_decoration({
 577                 deco_type = "simple",
 578                 place_on = {"default:dirt_with_grass"},
 579                 sidelen = 16,
 580                 noise_params = {
 581                         offset = 0,
 582                         scale = 0.08,
 583                         spread = {x=200, y=200, z=200},
 584                         seed = 66440,
 585                         octaves = 3,
 586                         persist = 0.6
 587                 },
 588                 biomes = {"default:grassland"},
 589                 y_min = -31000,
 590                 y_max = 31000,
 591                 decoration = "default:grass_3",
 592         })
 593
 594         minetest.register_decoration({
 595                 deco_type = "simple",
 596                 place_on = {"default:dirt_with_grass"},
 597                 sidelen = 16,
 598                 noise_params = {
 599                         offset = -0.02,
 600                         scale = 0.10,
 601                         spread = {x=200, y=200, z=200},
 602                         seed = 66440,
 603                         octaves = 3,
 604                         persist = 0.6
 605                 },
 606                 biomes = {"default:grassland"},
 607                 y_min = -31000,
 608                 y_max = 31000,
 609                 decoration = "default:grass_4",
 610         })
 611
 612         minetest.register_decoration({
 613                 deco_type = "simple",
 614                 place_on = {"default:dirt_with_grass"},
 615                 sidelen = 16,
 616                 noise_params = {
 617                         offset = -0.04,
 618                         scale = 0.12,
 619                         spread = {x=200, y=200, z=200},
 620                         seed = 66440,
 621                         octaves = 3,
 622                         persist = 0.6
 623                 },
 624                 biomes = {"default:grassland"},
 625                 y_min = -31000,
 626                 y_max = 31000,
 627                 decoration = "default:grass_5",
 628         })
 629 end
 630
 631
 632 --
 633 -- Detect mapgen to select functions
 634 --
 635
 636
 637 -- Mods using singlenode mapgen can call these functions to enable
 638 -- the use of minetest.generate_ores or minetest.generate_decorations
 639
 640 local mg_params = minetest.get_mapgen_params()
 641 if mg_params.mgname == "v5" then
 642         default.register_ores()
 643         default.register_biomes()
 644         default.register_decorations()
 645 elseif mg_params.mgname == "v6" then
 646         default.register_ores()
 647         default.register_mgv6_decorations()
 648 elseif mg_params.mgname == "v7" then
 649         default.register_ores()
 650         default.register_biomes()
 651         default.register_decorations()
 652 end
 653
 654
 655 --
 656 -- Generate nyan cats in all mapgens
 657 --
 658
 659
 660 -- facedir: 0/1/2/3 (head node facedir value)
 661 -- length: length of rainbow tail
 662 function default.make_nyancat(pos, facedir, length)
 663         local tailvec = {x=0, y=0, z=0}
 664         if facedir == 0 then
 665                 tailvec.z = 1
 666         elseif facedir == 1 then
 667                 tailvec.x = 1
 668         elseif facedir == 2 then
 669                 tailvec.z = -1
 670         elseif facedir == 3 then
 671                 tailvec.x = -1
 672         else
 673                 --print("default.make_nyancat(): Invalid facedir: "+dump(facedir))
 674                 facedir = 0
 675                 tailvec.z = 1
 676         end
 677         local p = {x=pos.x, y=pos.y, z=pos.z}
 678         minetest.set_node(p, {name="default:nyancat", param2=facedir})
 679         for i=1,length do
 680                 p.x = p.x + tailvec.x
 681                 p.z = p.z + tailvec.z
 682                 minetest.set_node(p, {name="default:nyancat_rainbow", param2=facedir})
 683         end
 684 end
 685
 686
 687 function default.generate_nyancats(minp, maxp, seed)
 688         local height_min = -31000
 689         local height_max = -32
 690         if maxp.y < height_min or minp.y > height_max then
 691                 return
 692         end
 693         local y_min = math.max(minp.y, height_min)
 694         local y_max = math.min(maxp.y, height_max)
 695         local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
 696         local pr = PseudoRandom(seed + 9324342)
 697         local max_num_nyancats = math.floor(volume / (16*16*16))
 698         for i=1,max_num_nyancats do
 699                 if pr:next(0, 1000) == 0 then
 700                         local x0 = pr:next(minp.x, maxp.x)
 701                         local y0 = pr:next(minp.y, maxp.y)
 702                         local z0 = pr:next(minp.z, maxp.z)
 703                         local p0 = {x=x0, y=y0, z=z0}
 704                         default.make_nyancat(p0, pr:next(0,3), pr:next(3,15))
 705                 end
 706         end
 707 end
 708
 709
 710 minetest.register_on_generated(default.generate_nyancats)
 711
 712
 713 --
 714 -- Deprecated ore generation code
 715 --
 716
 717
 718 function default.generate_ore(name, wherein, minp, maxp, seed,
 719                 chunks_per_volume, chunk_size, ore_per_chunk, height_min, height_max)
 720         minetest.log('action', "WARNING: default.generate_ore is deprecated")
 721
 722         if maxp.y < height_min or minp.y > height_max then
 723                 return
 724         end
 725         local y_min = math.max(minp.y, height_min)
 726         local y_max = math.min(maxp.y, height_max)
 727         if chunk_size >= y_max - y_min + 1 then
 728                 return
 729         end
 730         local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
 731         local pr = PseudoRandom(seed)
 732         local num_chunks = math.floor(chunks_per_volume * volume)
 733         local inverse_chance = math.floor(chunk_size*chunk_size*chunk_size / ore_per_chunk)
 734         --print("generate_ore num_chunks: "..dump(num_chunks))
 735         for i=1,num_chunks do
 736                 local y0 = pr:next(y_min, y_max-chunk_size+1)
 737                 if y0 >= height_min and y0 <= height_max then
 738                         local x0 = pr:next(minp.x, maxp.x-chunk_size+1)
 739                         local z0 = pr:next(minp.z, maxp.z-chunk_size+1)
 740                         local p0 = {x=x0, y=y0, z=z0}
 741                         for x1=0,chunk_size-1 do
 742                         for y1=0,chunk_size-1 do
 743                         for z1=0,chunk_size-1 do
 744                                 if pr:next(1,inverse_chance) == 1 then
 745                                         local x2 = x0+x1
 746                                         local y2 = y0+y1
 747                                         local z2 = z0+z1
 748                                         local p2 = {x=x2, y=y2, z=z2}
 749                                         if minetest.get_node(p2).name == wherein then
 750                                                 minetest.set_node(p2, {name=name})
 751                                         end
 752                                 end
 753                         end
 754                         end
 755                         end
 756                 end
 757         end
 758         --print("generate_ore done")
 759 end
 760