mods/default/mapgen.lua

   1 --
   2 -- Aliases for map generator outputs
   3 --
   4
   5 minetest.register_alias("mapgen_stone", "default:stone")
   6 minetest.register_alias("mapgen_dirt", "default:dirt")
   7 minetest.register_alias("mapgen_dirt_with_grass", "default:dirt_with_grass")
   8 minetest.register_alias("mapgen_sand", "default:sand")
   9 minetest.register_alias("mapgen_water_source", "default:water_source")
  10 minetest.register_alias("mapgen_river_water_source", "default:river_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_snowblock", "default:snowblock")
  17 minetest.register_alias("mapgen_snow", "default:snow")
  18 minetest.register_alias("mapgen_ice", "default:ice")
  19 minetest.register_alias("mapgen_sandstone", "default:sandstone")
  20
  21 -- Flora
  22
  23 minetest.register_alias("mapgen_tree", "default:tree")
  24 minetest.register_alias("mapgen_leaves", "default:leaves")
  25 minetest.register_alias("mapgen_apple", "default:apple")
  26 minetest.register_alias("mapgen_jungletree", "default:jungletree")
  27 minetest.register_alias("mapgen_jungleleaves", "default:jungleleaves")
  28 minetest.register_alias("mapgen_junglegrass", "default:junglegrass")
  29 minetest.register_alias("mapgen_pine_tree", "default:pine_tree")
  30 minetest.register_alias("mapgen_pine_needles", "default:pine_needles")
  31
  32 -- Dungeons
  33
  34 minetest.register_alias("mapgen_cobble", "default:cobble")
  35 minetest.register_alias("mapgen_stair_cobble", "stairs:stair_cobble")
  36 minetest.register_alias("mapgen_mossycobble", "default:mossycobble")
  37 minetest.register_alias("mapgen_sandstonebrick", "default:sandstonebrick")
  38 minetest.register_alias("mapgen_stair_sandstonebrick", "stairs:stair_sandstonebrick")
  39
  40
  41 --
  42 -- Register ores
  43 --
  44
  45 -- All mapgens except singlenode
  46 -- Blob ore first to avoid other ores inside blobs
  47
  48 function default.register_ores()
  49
  50         -- Clay
  51
  52         minetest.register_ore({
  53                 ore_type         = "blob",
  54                 ore              = "default:clay",
  55                 wherein          = {"default:sand"},
  56                 clust_scarcity   = 24 * 24 * 24,
  57                 clust_size       = 7,
  58                 y_min            = -15,
  59                 y_max            = 0,
  60                 noise_threshhold = 0,
  61                 noise_params     = {
  62                         offset = 0.35,
  63                         scale = 0.2,
  64                         spread = {x = 5, y = 5, z = 5},
  65                         seed = -316,
  66                         octaves = 1,
  67                         persist = 0.5
  68                 },
  69         })
  70
  71         -- Sand
  72
  73         minetest.register_ore({
  74                 ore_type         = "blob",
  75                 ore              = "default:sand",
  76                 wherein          = {"default:stone"},
  77                 clust_scarcity   = 24 * 24 * 24,
  78                 clust_size       = 7,
  79                 y_min            = -63,
  80                 y_max            = 4,
  81                 noise_threshhold = 0,
  82                 noise_params     = {
  83                         offset = 0.35,
  84                         scale = 0.2,
  85                         spread = {x = 5, y = 5, z = 5},
  86                         seed = 2316,
  87                         octaves = 1,
  88                         persist = 0.5
  89                 },
  90         })
  91
  92         -- Dirt
  93
  94         minetest.register_ore({
  95                 ore_type         = "blob",
  96                 ore              = "default:dirt",
  97                 wherein          = {"default:stone"},
  98                 clust_scarcity   = 24 * 24 * 24,
  99                 clust_size       = 7,
 100                 y_min            = -63,
 101                 y_max            = 31000,
 102                 noise_threshhold = 0,
 103                 noise_params     = {
 104                         offset = 0.35,
 105                         scale = 0.2,
 106                         spread = {x = 5, y = 5, z = 5},
 107                         seed = 17676,
 108                         octaves = 1,
 109                         persist = 0.5
 110                 },
 111         })
 112
 113         -- Gravel
 114
 115         minetest.register_ore({
 116                 ore_type         = "blob",
 117                 ore              = "default:gravel",
 118                 wherein          = {"default:stone"},
 119                 clust_scarcity   = 24 * 24 * 24,
 120                 clust_size       = 7,
 121                 y_min            = -31000,
 122                 y_max            = 31000,
 123                 noise_threshhold = 0,
 124                 noise_params     = {
 125                         offset = 0.35,
 126                         scale = 0.2,
 127                         spread = {x = 5, y = 5, z = 5},
 128                         seed = 766,
 129                         octaves = 1,
 130                         persist = 0.5
 131                 },
 132         })
 133
 134         -- Coal
 135
 136         minetest.register_ore({
 137                 ore_type       = "scatter",
 138                 ore            = "default:stone_with_coal",
 139                 wherein        = "default:stone",
 140                 clust_scarcity = 8 * 8 * 8,
 141                 clust_num_ores = 8,
 142                 clust_size     = 3,
 143                 y_min          = -31000,
 144                 y_max          = 64,
 145         })
 146
 147         minetest.register_ore({
 148                 ore_type       = "scatter",
 149                 ore            = "default:stone_with_coal",
 150                 wherein        = "default:stone",
 151                 clust_scarcity = 24 * 24 * 24,
 152                 clust_num_ores = 27,
 153                 clust_size     = 6,
 154                 y_min          = -31000,
 155                 y_max          = 0,
 156         })
 157
 158         -- Iron
 159
 160         minetest.register_ore({
 161                 ore_type       = "scatter",
 162                 ore            = "default:stone_with_iron",
 163                 wherein        = "default:stone",
 164                 clust_scarcity = 12 * 12 * 12,
 165                 clust_num_ores = 3,
 166                 clust_size     = 2,
 167                 y_min          = -15,
 168                 y_max          = 2,
 169         })
 170
 171         minetest.register_ore({
 172                 ore_type       = "scatter",
 173                 ore            = "default:stone_with_iron",
 174                 wherein        = "default:stone",
 175                 clust_scarcity = 9 * 9 * 9,
 176                 clust_num_ores = 5,
 177                 clust_size     = 3,
 178                 y_min          = -63,
 179                 y_max          = -16,
 180         })
 181
 182         minetest.register_ore({
 183                 ore_type       = "scatter",
 184                 ore            = "default:stone_with_iron",
 185                 wherein        = "default:stone",
 186                 clust_scarcity = 7 * 7 * 7,
 187                 clust_num_ores = 5,
 188                 clust_size     = 3,
 189                 y_min          = -31000,
 190                 y_max          = -64,
 191         })
 192
 193         minetest.register_ore({
 194                 ore_type       = "scatter",
 195                 ore            = "default:stone_with_iron",
 196                 wherein        = "default:stone",
 197                 clust_scarcity = 24 * 24 * 24,
 198                 clust_num_ores = 27,
 199                 clust_size     = 6,
 200                 y_min          = -31000,
 201                 y_max          = -64,
 202         })
 203
 204         --Mese
 205
 206         minetest.register_ore({
 207                 ore_type       = "scatter",
 208                 ore            = "default:stone_with_mese",
 209                 wherein        = "default:stone",
 210                 clust_scarcity = 18 * 18 * 18,
 211                 clust_num_ores = 3,
 212                 clust_size     = 2,
 213                 y_min          = -255,
 214                 y_max          = -64,
 215         })
 216
 217         minetest.register_ore({
 218                 ore_type       = "scatter",
 219                 ore            = "default:stone_with_mese",
 220                 wherein        = "default:stone",
 221                 clust_scarcity = 14 * 14 * 14,
 222                 clust_num_ores = 5,
 223                 clust_size     = 3,
 224                 y_min          = -31000,
 225                 y_max          = -256,
 226         })
 227
 228         minetest.register_ore({
 229                 ore_type       = "scatter",
 230                 ore            = "default:mese",
 231                 wherein        = "default:stone",
 232                 clust_scarcity = 36 * 36 * 36,
 233                 clust_num_ores = 3,
 234                 clust_size     = 2,
 235                 y_min          = -31000,
 236                 y_max          = -1024,
 237         })
 238
 239         -- Gold
 240
 241         minetest.register_ore({
 242                 ore_type       = "scatter",
 243                 ore            = "default:stone_with_gold",
 244                 wherein        = "default:stone",
 245                 clust_scarcity = 15 * 15 * 15,
 246                 clust_num_ores = 3,
 247                 clust_size     = 2,
 248                 y_min          = -255,
 249                 y_max          = -64,
 250         })
 251
 252         minetest.register_ore({
 253                 ore_type       = "scatter",
 254                 ore            = "default:stone_with_gold",
 255                 wherein        = "default:stone",
 256                 clust_scarcity = 13 * 13 * 13,
 257                 clust_num_ores = 5,
 258                 clust_size     = 3,
 259                 y_min          = -31000,
 260                 y_max          = -256,
 261         })
 262
 263         -- Diamond
 264
 265         minetest.register_ore({
 266                 ore_type       = "scatter",
 267                 ore            = "default:stone_with_diamond",
 268                 wherein        = "default:stone",
 269                 clust_scarcity = 17 * 17 * 17,
 270                 clust_num_ores = 4,
 271                 clust_size     = 3,
 272                 y_min          = -255,
 273                 y_max          = -128,
 274         })
 275
 276         minetest.register_ore({
 277                 ore_type       = "scatter",
 278                 ore            = "default:stone_with_diamond",
 279                 wherein        = "default:stone",
 280                 clust_scarcity = 15 * 15 * 15,
 281                 clust_num_ores = 4,
 282                 clust_size     = 3,
 283                 y_min          = -31000,
 284                 y_max          = -256,
 285         })
 286
 287         -- Copper
 288
 289         minetest.register_ore({
 290                 ore_type       = "scatter",
 291                 ore            = "default:stone_with_copper",
 292                 wherein        = "default:stone",
 293                 clust_scarcity = 12 * 12 * 12,
 294                 clust_num_ores = 4,
 295                 clust_size     = 3,
 296                 y_min          = -63,
 297                 y_max          = -16,
 298         })
 299
 300         minetest.register_ore({
 301                 ore_type       = "scatter",
 302                 ore            = "default:stone_with_copper",
 303                 wherein        = "default:stone",
 304                 clust_scarcity = 9 * 9 * 9,
 305                 clust_num_ores = 5,
 306                 clust_size     = 3,
 307                 y_min          = -31000,
 308                 y_max          = -64,
 309         })
 310 end
 311
 312
 313 --
 314 -- Register biomes
 315 --
 316
 317 -- All mapgens except mgv6 and singlenode
 318
 319 function default.register_biomes()
 320         minetest.clear_registered_biomes()
 321
 322         -- Permanent ice
 323
 324         minetest.register_biome({
 325                 name = "glacier",
 326                 node_dust = "default:snowblock",
 327                 node_top = "default:snowblock",
 328                 depth_top = 1,
 329                 node_filler = "default:snowblock",
 330                 depth_filler = 3,
 331                 node_stone = "default:ice",
 332                 node_water_top = "default:ice",
 333                 depth_water_top = 10,
 334                 --node_water = "",
 335                 node_river_water = "default:ice",
 336                 y_min = -8,
 337                 y_max = 31000,
 338                 heat_point = -5,
 339                 humidity_point = 50,
 340         })
 341
 342         minetest.register_biome({
 343                 name = "glacier_ocean",
 344                 node_dust = "default:snowblock",
 345                 node_top = "default:gravel",
 346                 depth_top = 1,
 347                 node_filler = "default:gravel",
 348                 depth_filler = 2,
 349                 --node_stone = "",
 350                 --node_water_top = "",
 351                 --depth_water_top = ,
 352                 --node_water = "",
 353                 --node_river_water = "",
 354                 y_min = -112,
 355                 y_max = -9,
 356                 heat_point = -5,
 357                 humidity_point = 50,
 358         })
 359
 360         -- Cold
 361
 362         minetest.register_biome({
 363                 name = "tundra",
 364                 node_dust = "default:snow",
 365                 node_top = "default:dirt_with_snow",
 366                 depth_top = 1,
 367                 node_filler = "default:dirt",
 368                 depth_filler = 0,
 369                 --node_stone = "",
 370                 --node_water_top = "",
 371                 --depth_water_top = ,
 372                 --node_water = "",
 373                 --node_river_water = "",
 374                 y_min = 2,
 375                 y_max = 31000,
 376                 heat_point = 20,
 377                 humidity_point = 30,
 378         })
 379
 380         minetest.register_biome({
 381                 name = "tundra_ocean",
 382                 --node_dust = "",
 383                 node_top = "default:sand",
 384                 depth_top = 1,
 385                 node_filler = "default:sand",
 386                 depth_filler = 2,
 387                 --node_stone = "",
 388                 --node_water_top = "",
 389                 --depth_water_top = ,
 390                 --node_water = "",
 391                 --node_river_water = "",
 392                 y_min = -112,
 393                 y_max = 1,
 394                 heat_point = 20,
 395                 humidity_point = 30,
 396         })
 397
 398         minetest.register_biome({
 399                 name = "taiga",
 400                 node_dust = "default:snow",
 401                 node_top = "default:snowblock",
 402                 depth_top = 1,
 403                 node_filler = "default:dirt",
 404                 depth_filler = 2,
 405                 --node_stone = "",
 406                 --node_water_top = "",
 407                 --depth_water_top = ,
 408                 --node_water = "",
 409                 --node_river_water = "",
 410                 y_min = 2,
 411                 y_max = 31000,
 412                 heat_point = 20,
 413                 humidity_point = 70,
 414         })
 415
 416         minetest.register_biome({
 417                 name = "taiga_ocean",
 418                 --node_dust = "",
 419                 node_top = "default:sand",
 420                 depth_top = 1,
 421                 node_filler = "default:sand",
 422                 depth_filler = 2,
 423                 --node_stone = "",
 424                 --node_water_top = "",
 425                 --depth_water_top = ,
 426                 --node_water = "",
 427                 --node_river_water = "",
 428                 y_min = -112,
 429                 y_max = 1,
 430                 heat_point = 20,
 431                 humidity_point = 70,
 432         })
 433
 434         -- Cool
 435
 436         minetest.register_biome({
 437                 name = "stone_grassland",
 438                 --node_dust = "",
 439                 node_top = "default:dirt_with_grass",
 440                 depth_top = 1,
 441                 node_filler = "default:dirt",
 442                 depth_filler = 0,
 443                 --node_stone = "",
 444                 --node_water_top = "",
 445                 --depth_water_top = ,
 446                 --node_water = "",
 447                 --node_river_water = "",
 448                 y_min = 6,
 449                 y_max = 31000,
 450                 heat_point = 45,
 451                 humidity_point = 30,
 452         })
 453
 454         minetest.register_biome({
 455                 name = "stone_grassland_ocean",
 456                 --node_dust = "",
 457                 node_top = "default:sand",
 458                 depth_top = 1,
 459                 node_filler = "default:sand",
 460                 depth_filler = 2,
 461                 --node_stone = "",
 462                 --node_water_top = "",
 463                 --depth_water_top = ,
 464                 --node_water = "",
 465                 --node_river_water = "",
 466                 y_min = -112,
 467                 y_max = 5,
 468                 heat_point = 45,
 469                 humidity_point = 30,
 470         })
 471
 472         minetest.register_biome({
 473                 name = "coniferous_forest",
 474                 --node_dust = "",
 475                 node_top = "default:dirt_with_grass",
 476                 depth_top = 1,
 477                 node_filler = "default:dirt",
 478                 depth_filler = 2,
 479                 --node_stone = "",
 480                 --node_water_top = "",
 481                 --depth_water_top = ,
 482                 --node_water = "",
 483                 --node_river_water = "",
 484                 y_min = 6,
 485                 y_max = 31000,
 486                 heat_point = 45,
 487                 humidity_point = 70,
 488         })
 489
 490         minetest.register_biome({
 491                 name = "coniferous_forest_ocean",
 492                 --node_dust = "",
 493                 node_top = "default:sand",
 494                 depth_top = 1,
 495                 node_filler = "default:sand",
 496                 depth_filler = 2,
 497                 --node_stone = "",
 498                 --node_water_top = "",
 499                 --depth_water_top = ,
 500                 --node_water = "",
 501                 --node_river_water = "",
 502                 y_min = -112,
 503                 y_max = 5,
 504                 heat_point = 45,
 505                 humidity_point = 70,
 506         })
 507
 508         -- Warm
 509
 510         minetest.register_biome({
 511                 name = "sandstone_grassland",
 512                 --node_dust = "",
 513                 node_top = "default:dirt_with_grass",
 514                 depth_top = 1,
 515                 node_filler = "default:dirt",
 516                 depth_filler = 0,
 517                 node_stone = "default:sandstone",
 518                 --node_water_top = "",
 519                 --depth_water_top = ,
 520                 --node_water = "",
 521                 --node_river_water = "",
 522                 y_min = 6,
 523                 y_max = 31000,
 524                 heat_point = 70,
 525                 humidity_point = 30,
 526         })
 527
 528         minetest.register_biome({
 529                 name = "sandstone_grassland_ocean",
 530                 --node_dust = "",
 531                 node_top = "default:sand",
 532                 depth_top = 1,
 533                 node_filler = "default:sand",
 534                 depth_filler = 2,
 535                 node_stone = "default:sandstone",
 536                 --node_water_top = "",
 537                 --depth_water_top = ,
 538                 --node_water = "",
 539                 --node_river_water = "",
 540                 y_min = -112,
 541                 y_max = 5,
 542                 heat_point = 70,
 543                 humidity_point = 30,
 544         })
 545
 546         minetest.register_biome({
 547                 name = "deciduous_forest",
 548                 --node_dust = "",
 549                 node_top = "default:dirt_with_grass",
 550                 depth_top = 1,
 551                 node_filler = "default:dirt",
 552                 depth_filler = 2,
 553                 --node_stone = "",
 554                 --node_water_top = "",
 555                 --depth_water_top = ,
 556                 --node_water = "",
 557                 --node_river_water = "",
 558                 y_min = 6,
 559                 y_max = 31000,
 560                 heat_point = 70,
 561                 humidity_point = 70,
 562         })
 563
 564         minetest.register_biome({
 565                 name = "deciduous_forest_ocean",
 566                 --node_dust = "",
 567                 node_top = "default:sand",
 568                 depth_top = 1,
 569                 node_filler = "default:sand",
 570                 depth_filler = 2,
 571                 --node_stone = "",
 572                 --node_water_top = "",
 573                 --depth_water_top = ,
 574                 --node_water = "",
 575                 --node_river_water = "",
 576                 y_min = -112,
 577                 y_max = 5,
 578                 heat_point = 70,
 579                 humidity_point = 70,
 580         })
 581
 582         -- Hot
 583
 584         minetest.register_biome({
 585                 name = "desert",
 586                 --node_dust = "",
 587                 node_top = "default:desert_sand",
 588                 depth_top = 1,
 589                 node_filler = "default:desert_sand",
 590                 depth_filler = 1,
 591                 node_stone = "default:desert_stone",
 592                 --node_water_top = "",
 593                 --depth_water_top = ,
 594                 --node_water = "",
 595                 --node_river_water = "",
 596                 y_min = 5,
 597                 y_max = 31000,
 598                 heat_point = 95,
 599                 humidity_point = 10,
 600         })
 601
 602         minetest.register_biome({
 603                 name = "desert_ocean",
 604                 --node_dust = "",
 605                 node_top = "default:sand",
 606                 depth_top = 1,
 607                 node_filler = "default:sand",
 608                 depth_filler = 2,
 609                 node_stone = "default:desert_stone",
 610                 --node_water_top = "",
 611                 --depth_water_top = ,
 612                 --node_water = "",
 613                 --node_river_water = "",
 614                 y_min = -112,
 615                 y_max = 4,
 616                 heat_point = 95,
 617                 humidity_point = 10,
 618         })
 619
 620         minetest.register_biome({
 621                 name = "savanna",
 622                 --node_dust = "",
 623                 node_top = "default:dirt_with_dry_grass",
 624                 depth_top = 1,
 625                 node_filler = "default:dirt",
 626                 depth_filler = 1,
 627                 --node_stone = "",
 628                 --node_water_top = "",
 629                 --depth_water_top = ,
 630                 --node_water = "",
 631                 --node_river_water = "",
 632                 y_min = 5,
 633                 y_max = 31000,
 634                 heat_point = 95,
 635                 humidity_point = 50,
 636         })
 637
 638         minetest.register_biome({
 639                 name = "savanna_ocean",
 640                 --node_dust = "",
 641                 node_top = "default:sand",
 642                 depth_top = 1,
 643                 node_filler = "default:sand",
 644                 depth_filler = 2,
 645                 --node_stone = "",
 646                 --node_water_top = "",
 647                 --depth_water_top = ,
 648                 --node_water = "",
 649                 --node_river_water = "",
 650                 y_min = -112,
 651                 y_max = 4,
 652                 heat_point = 95,
 653                 humidity_point = 50,
 654         })
 655
 656         minetest.register_biome({
 657                 name = "rainforest",
 658                 --node_dust = "",
 659                 node_top = "default:dirt_with_grass",
 660                 depth_top = 1,
 661                 node_filler = "default:dirt",
 662                 depth_filler = 2,
 663                 --node_stone = "",
 664                 --node_water_top = "",
 665                 --depth_water_top = ,
 666                 --node_water = "",
 667                 --node_river_water = "",
 668                 y_min = 1,
 669                 y_max = 31000,
 670                 heat_point = 95,
 671                 humidity_point = 90,
 672         })
 673
 674         minetest.register_biome({
 675                 name = "rainforest_swamp",
 676                 --node_dust = "",
 677                 node_top = "default:dirt",
 678                 depth_top = 1,
 679                 node_filler = "default:dirt",
 680                 depth_filler = 2,
 681                 --node_stone = "",
 682                 --node_water_top = "",
 683                 --depth_water_top = ,
 684                 --node_water = "",
 685                 --node_river_water = "",
 686                 y_min = 0,
 687                 y_max = 0,
 688                 heat_point = 95,
 689                 humidity_point = 90,
 690         })
 691
 692         minetest.register_biome({
 693                 name = "rainforest_ocean",
 694                 --node_dust = "",
 695                 node_top = "default:sand",
 696                 depth_top = 1,
 697                 node_filler = "default:sand",
 698                 depth_filler = 2,
 699                 --node_stone = "",
 700                 --node_water_top = "",
 701                 --depth_water_top = ,
 702                 --node_water = "",
 703                 --node_river_water = "",
 704                 y_min = -112,
 705                 y_max = -1,
 706                 heat_point = 95,
 707                 humidity_point = 90,
 708         })
 709
 710         -- Underground
 711
 712         minetest.register_biome({
 713                 name = "underground",
 714                 --node_dust = "",
 715                 --node_top = "",
 716                 depth_top = 0,
 717                 --node_filler = "",
 718                 depth_filler = -4,
 719                 --node_stone = "",
 720                 --node_water_top = "",
 721                 --depth_water_top = ,
 722                 --node_water = "",
 723                 --node_river_water = "",
 724                 y_min = -31000,
 725                 y_max = -113,
 726                 heat_point = 50,
 727                 humidity_point = 50,
 728         })
 729 end
 730
 731
 732 --
 733 -- Register decorations
 734 --
 735
 736 -- Mgv6
 737
 738 function default.register_mgv6_decorations()
 739         minetest.clear_registered_decorations()
 740
 741         -- Papyrus
 742
 743         minetest.register_decoration({
 744                 deco_type = "simple",
 745                 place_on = {"default:dirt_with_grass"},
 746                 sidelen = 8,
 747                 noise_params = {
 748                         offset = -0.3,
 749                         scale = 0.7,
 750                         spread = {x = 100, y = 100, z = 100},
 751                         seed = 354,
 752                         octaves = 3,
 753                         persist = 0.7
 754                 },
 755                 y_min = 1,
 756                 y_max = 1,
 757                 decoration = "default:papyrus",
 758                 height = 2,
 759                 height_max = 4,
 760                 spawn_by = "default:water_source",
 761                 num_spawn_by = 1,
 762         })
 763
 764         -- Cacti
 765
 766         minetest.register_decoration({
 767                 deco_type = "simple",
 768                 place_on = {"default:desert_sand"},
 769                 sidelen = 16,
 770                 noise_params = {
 771                         offset = -0.012,
 772                         scale = 0.024,
 773                         spread = {x = 100, y = 100, z = 100},
 774                         seed = 230,
 775                         octaves = 3,
 776                         persist = 0.6
 777                 },
 778                 y_min = 1,
 779                 y_max = 30,
 780                 decoration = "default:cactus",
 781                 height = 3,
 782                 height_max = 4,
 783         })
 784
 785         -- Long grasses
 786
 787         for length = 1, 5 do
 788                 minetest.register_decoration({
 789                         deco_type = "simple",
 790                         place_on = {"default:dirt_with_grass"},
 791                         sidelen = 16,
 792                         noise_params = {
 793                                 offset = 0,
 794                                 scale = 0.007,
 795                                 spread = {x = 100, y = 100, z = 100},
 796                                 seed = 329,
 797                                 octaves = 3,
 798                                 persist = 0.6
 799                         },
 800                         y_min = 1,
 801                         y_max = 30,
 802                         decoration = "default:grass_"..length,
 803                 })
 804         end
 805
 806         -- Dry shrubs
 807
 808         minetest.register_decoration({
 809                 deco_type = "simple",
 810                 place_on = {"default:desert_sand", "default:dirt_with_snow"},
 811                 sidelen = 16,
 812                 noise_params = {
 813                         offset = 0,
 814                         scale = 0.035,
 815                         spread = {x = 100, y = 100, z = 100},
 816                         seed = 329,
 817                         octaves = 3,
 818                         persist = 0.6
 819                 },
 820                 y_min = 1,
 821                 y_max = 30,
 822                 decoration = "default:dry_shrub",
 823         })
 824 end
 825
 826 -- All mapgens except mgv6 and singlenode
 827
 828 local function register_grass_decoration(offset, scale, length)
 829         minetest.register_decoration({
 830                 deco_type = "simple",
 831                 place_on = {"default:dirt_with_grass", "default:sand"},
 832                 sidelen = 16,
 833                 noise_params = {
 834                         offset = offset,
 835                         scale = scale,
 836                         spread = {x=200, y=200, z=200},
 837                         seed = 329,
 838                         octaves = 3,
 839                         persist = 0.6
 840                 },
 841                 biomes = {
 842                         "stone_grassland", "stone_grassland_ocean",
 843                         "sandstone_grassland", "sandstone_grassland_ocean",
 844                         "deciduous_forest", "deciduous_forest_ocean",
 845                         "coniferous_forest", "coniferous_forest_ocean",
 846                 },
 847                 y_min = 5,
 848                 y_max = 31000,
 849                 decoration = "default:grass_"..length,
 850         })
 851 end
 852
 853 local function register_dry_grass_decoration(offset, scale, length)
 854         minetest.register_decoration({
 855                 deco_type = "simple",
 856                 place_on = {"default:dirt_with_dry_grass"},
 857                 sidelen = 16,
 858                 noise_params = {
 859                         offset = offset,
 860                         scale = scale,
 861                         spread = {x=200, y=200, z=200},
 862                         seed = 329,
 863                         octaves = 3,
 864                         persist = 0.6
 865                 },
 866                 biomes = {"savanna"},
 867                 y_min = 5,
 868                 y_max = 31000,
 869                 decoration = "default:dry_grass_"..length,
 870         })
 871 end
 872
 873 function default.register_decorations()
 874         minetest.clear_registered_decorations()
 875
 876         -- Apple tree
 877
 878         minetest.register_decoration({
 879                 deco_type = "schematic",
 880                 place_on = {"default:dirt_with_grass"},
 881                 sidelen = 16,
 882                 noise_params = {
 883                         offset = 0.04,
 884                         scale = 0.02,
 885                         spread = {x=250, y=250, z=250},
 886                         seed = 2,
 887                         octaves = 3,
 888                         persist = 0.66
 889                 },
 890                 biomes = {"deciduous_forest"},
 891                 y_min = 6,
 892                 y_max = 31000,
 893                 schematic = minetest.get_modpath("default").."/schematics/apple_tree.mts",
 894                 flags = "place_center_x, place_center_z",
 895         })
 896
 897         -- Jungle tree
 898
 899         minetest.register_decoration({
 900                 deco_type = "schematic",
 901                 place_on = {"default:dirt_with_grass", "default:dirt"},
 902                 sidelen = 80,
 903                 fill_ratio = 0.09,
 904                 biomes = {"rainforest", "rainforest_swamp"},
 905                 y_min = 0,
 906                 y_max = 31000,
 907                 schematic = minetest.get_modpath("default").."/schematics/jungle_tree.mts",
 908                 flags = "place_center_x, place_center_z",
 909         })
 910
 911         -- Taiga and temperate forest pine tree
 912
 913         minetest.register_decoration({
 914                 deco_type = "schematic",
 915                 place_on = {"default:snowblock", "default:dirt_with_grass"},
 916                 sidelen = 16,
 917                 noise_params = {
 918                         offset = 0.04,
 919                         scale = 0.02,
 920                         spread = {x=250, y=250, z=250},
 921                         seed = 2,
 922                         octaves = 3,
 923                         persist = 0.66
 924                 },
 925                 biomes = {"taiga", "coniferous_forest"},
 926                 y_min = 2,
 927                 y_max = 31000,
 928                 schematic = minetest.get_modpath("default").."/schematics/pine_tree.mts",
 929                 flags = "place_center_x, place_center_z",
 930         })
 931
 932         -- Acacia tree
 933
 934         minetest.register_decoration({
 935                 deco_type = "schematic",
 936                 place_on = {"default:dirt_with_dry_grass"},
 937                 sidelen = 80,
 938                 noise_params = {
 939                         offset = 0,
 940                         scale = 0.003,
 941                         spread = {x=250, y=250, z=250},
 942                         seed = 2,
 943                         octaves = 3,
 944                         persist = 0.66
 945                 },
 946                 biomes = {"savanna"},
 947                 y_min = 6,
 948                 y_max = 31000,
 949                 schematic = minetest.get_modpath("default").."/schematics/acacia_tree.mts",
 950                 flags = "place_center_x, place_center_z",
 951                 rotation = "random",
 952         })
 953
 954         -- Large cactus
 955
 956         minetest.register_decoration({
 957                 deco_type = "schematic",
 958                 place_on = {"default:desert_sand"},
 959                 sidelen = 80,
 960                 noise_params = {
 961                         offset = -0.0005,
 962                         scale = 0.0015,
 963                         spread = {x=200, y=200, z=200},
 964                         seed = 230,
 965                         octaves = 3,
 966                         persist = 0.6
 967                 },
 968                 biomes = {"desert"},
 969                 y_min = 5,
 970                 y_max = 31000,
 971                 schematic = minetest.get_modpath("default").."/schematics/large_cactus.mts",
 972                 flags = "place_center_x",
 973                 rotation = "random",
 974         })
 975
 976         -- Cactus
 977
 978         minetest.register_decoration({
 979                 deco_type = "simple",
 980                 place_on = {"default:desert_sand"},
 981                 sidelen = 80,
 982                 noise_params = {
 983                         offset = -0.0005,
 984                         scale = 0.0015,
 985                         spread = {x=200, y=200, z=200},
 986                         seed = 230,
 987                         octaves = 3,
 988                         persist = 0.6
 989                 },
 990                 biomes = {"desert"},
 991                 y_min = 5,
 992                 y_max = 31000,
 993                 decoration = "default:cactus",
 994                 height = 2,
 995                 height_max = 5,
 996         })
 997
 998         -- Papyrus
 999
1000         minetest.register_decoration({
1001                 deco_type = "schematic",
1002                 place_on = {"default:sand"},
1003                 sidelen = 16,
1004                 noise_params = {
1005                         offset = -0.3,
1006                         scale = 0.7,
1007                         spread = {x=200, y=200, z=200},
1008                         seed = 354,
1009                         octaves = 3,
1010                         persist = 0.7
1011                 },
1012                 biomes = {"savanna_ocean", "desert_ocean"},
1013                 y_min = 0,
1014                 y_max = 0,
1015                 schematic = minetest.get_modpath("default").."/schematics/papyrus.mts",
1016         })
1017
1018         -- Grasses
1019
1020         register_grass_decoration(-0.03,  0.09,  5)
1021         register_grass_decoration(-0.015, 0.075, 4)
1022         register_grass_decoration(0,      0.06,  3)
1023         register_grass_decoration(0.015,  0.045, 2)
1024         register_grass_decoration(0.03,   0.03,  1)
1025
1026         -- Dry grasses
1027
1028         register_dry_grass_decoration(0.01, 0.05,  5)
1029         register_dry_grass_decoration(0.03, 0.03,  4)
1030         register_dry_grass_decoration(0.05, 0.01,  3)
1031         register_dry_grass_decoration(0.07, -0.01, 2)
1032         register_dry_grass_decoration(0.09, -0.03, 1)
1033
1034         -- Junglegrass
1035
1036         minetest.register_decoration({
1037                 deco_type = "simple",
1038                 place_on = {"default:dirt_with_grass"},
1039                 sidelen = 80,
1040                 fill_ratio = 0.1,
1041                 biomes = {"rainforest"},
1042                 y_min = 1,
1043                 y_max = 31000,
1044                 decoration = "default:junglegrass",
1045         })
1046
1047         -- Dry shrub
1048
1049         minetest.register_decoration({
1050                 deco_type = "simple",
1051                 place_on = {"default:desert_sand", "default:dirt_with_snow"},
1052                 sidelen = 16,
1053                 noise_params = {
1054                         offset = 0,
1055                         scale = 0.02,
1056                         spread = {x=200, y=200, z=200},
1057                         seed = 329,
1058                         octaves = 3,
1059                         persist = 0.6
1060                 },
1061                 biomes = {"desert", "tundra"},
1062                 y_min = 2,
1063                 y_max = 31000,
1064                 decoration = "default:dry_shrub",
1065         })
1066 end
1067
1068
1069 --
1070 -- Generate nyan cats
1071 --
1072
1073 -- All mapgens except singlenode
1074
1075 function default.make_nyancat(pos, facedir, length)
1076         local tailvec = {x = 0, y = 0, z = 0}
1077         if facedir == 0 then
1078                 tailvec.z = 1
1079         elseif facedir == 1 then
1080                 tailvec.x = 1
1081         elseif facedir == 2 then
1082                 tailvec.z = -1
1083         elseif facedir == 3 then
1084                 tailvec.x = -1
1085         else
1086                 facedir = 0
1087                 tailvec.z = 1
1088         end
1089         local p = {x = pos.x, y = pos.y, z = pos.z}
1090         minetest.set_node(p, {name = "default:nyancat", param2 = facedir})
1091         for i = 1, length do
1092                 p.x = p.x + tailvec.x
1093                 p.z = p.z + tailvec.z
1094                 minetest.set_node(p, {name = "default:nyancat_rainbow", param2 = facedir})
1095         end
1096 end
1097
1098 function default.generate_nyancats(minp, maxp, seed)
1099         local height_min = -31000
1100         local height_max = -32
1101         if maxp.y < height_min or minp.y > height_max then
1102                 return
1103         end
1104         local y_min = math.max(minp.y, height_min)
1105         local y_max = math.min(maxp.y, height_max)
1106         local volume = (maxp.x - minp.x + 1) * (y_max - y_min + 1) * (maxp.z - minp.z + 1)
1107         local pr = PseudoRandom(seed + 9324342)
1108         local max_num_nyancats = math.floor(volume / (16 * 16 * 16))
1109         for i = 1, max_num_nyancats do
1110                 if pr:next(0, 1000) == 0 then
1111                         local x0 = pr:next(minp.x, maxp.x)
1112                         local y0 = pr:next(minp.y, maxp.y)
1113                         local z0 = pr:next(minp.z, maxp.z)
1114                         local p0 = {x = x0, y = y0, z = z0}
1115                         default.make_nyancat(p0, pr:next(0, 3), pr:next(3, 15))
1116                 end
1117         end
1118 end
1119
1120
1121 --
1122 -- Detect mapgen to select functions
1123 --
1124
1125 -- Mods using singlenode mapgen can call these functions to enable
1126 -- the use of minetest.generate_ores or minetest.generate_decorations
1127
1128 local mg_params = minetest.get_mapgen_params()
1129 if mg_params.mgname == "v6" then
1130         default.register_ores()
1131         default.register_mgv6_decorations()
1132         minetest.register_on_generated(default.generate_nyancats)
1133 elseif mg_params.mgname ~= "singlenode" then
1134         default.register_ores()
1135         default.register_biomes()
1136         default.register_decorations()
1137         minetest.register_on_generated(default.generate_nyancats)
1138 end