src/mapgen.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "mapgen.h"
  21 #include "voxel.h"
  22 #include "noise.h"
  23 #include "mapblock.h"
  24 #include "map.h"
  25 //#include "serverobject.h"
  26 #include "content_sao.h"
  27 #include "nodedef.h"
  28 #include "content_mapnode.h" // For content_mapnode_get_new_name
  29 #include "voxelalgorithms.h"
  30 #include "profiler.h"
  31 #include "main.h" // For g_profiler
  32
  33 namespace mapgen
  34 {
  35
  36 /*
  37         Some helper functions for the map generator
  38 */
  39
  40 #if 1
  41 // Returns Y one under area minimum if not found
  42 static s16 find_ground_level(VoxelManipulator &vmanip, v2s16 p2d,
  43                 INodeDefManager *ndef)
  44 {
  45         v3s16 em = vmanip.m_area.getExtent();
  46         s16 y_nodes_max = vmanip.m_area.MaxEdge.Y;
  47         s16 y_nodes_min = vmanip.m_area.MinEdge.Y;
  48         u32 i = vmanip.m_area.index(v3s16(p2d.X, y_nodes_max, p2d.Y));
  49         s16 y;
  50         for(y=y_nodes_max; y>=y_nodes_min; y--)
  51         {
  52                 MapNode &n = vmanip.m_data[i];
  53                 if(ndef->get(n).walkable)
  54                         break;
  55
  56                 vmanip.m_area.add_y(em, i, -1);
  57         }
  58         if(y >= y_nodes_min)
  59                 return y;
  60         else
  61                 return y_nodes_min - 1;
  62 }
  63
  64 // Returns Y one under area minimum if not found
  65 static s16 find_ground_level_clever(VoxelManipulator &vmanip, v2s16 p2d,
  66                 INodeDefManager *ndef)
  67 {
  68         v3s16 em = vmanip.m_area.getExtent();
  69         s16 y_nodes_max = vmanip.m_area.MaxEdge.Y;
  70         s16 y_nodes_min = vmanip.m_area.MinEdge.Y;
  71         u32 i = vmanip.m_area.index(v3s16(p2d.X, y_nodes_max, p2d.Y));
  72         s16 y;
  73         content_t c_tree = ndef->getId("mapgen_tree");
  74         content_t c_leaves = ndef->getId("mapgen_leaves");
  75         for(y=y_nodes_max; y>=y_nodes_min; y--)
  76         {
  77                 MapNode &n = vmanip.m_data[i];
  78                 if(ndef->get(n).walkable
  79                                 && n.getContent() != c_tree
  80                                 && n.getContent() != c_leaves)
  81                         break;
  82
  83                 vmanip.m_area.add_y(em, i, -1);
  84         }
  85         if(y >= y_nodes_min)
  86                 return y;
  87         else
  88                 return y_nodes_min - 1;
  89 }
  90
  91 // Returns Y one under area minimum if not found
  92 static s16 find_stone_level(VoxelManipulator &vmanip, v2s16 p2d,
  93                 INodeDefManager *ndef)
  94 {
  95         v3s16 em = vmanip.m_area.getExtent();
  96         s16 y_nodes_max = vmanip.m_area.MaxEdge.Y;
  97         s16 y_nodes_min = vmanip.m_area.MinEdge.Y;
  98         u32 i = vmanip.m_area.index(v3s16(p2d.X, y_nodes_max, p2d.Y));
  99         s16 y;
 100         content_t c_stone = ndef->getId("mapgen_stone");
 101         for(y=y_nodes_max; y>=y_nodes_min; y--)
 102         {
 103                 MapNode &n = vmanip.m_data[i];
 104                 if(n.getContent() == c_stone)
 105                         break;
 106
 107                 vmanip.m_area.add_y(em, i, -1);
 108         }
 109         if(y >= y_nodes_min)
 110                 return y;
 111         else
 112                 return y_nodes_min - 1;
 113 }
 114 #endif
 115
 116 void make_tree(ManualMapVoxelManipulator &vmanip, v3s16 p0,
 117                 bool is_apple_tree, INodeDefManager *ndef)
 118 {
 119         MapNode treenode(ndef->getId("mapgen_tree"));
 120         MapNode leavesnode(ndef->getId("mapgen_leaves"));
 121         MapNode applenode(ndef->getId("mapgen_apple"));
 122
 123         s16 trunk_h = myrand_range(4, 5);
 124         v3s16 p1 = p0;
 125         for(s16 ii=0; ii<trunk_h; ii++)
 126         {
 127                 if(vmanip.m_area.contains(p1))
 128                         vmanip.m_data[vmanip.m_area.index(p1)] = treenode;
 129                 p1.Y++;
 130         }
 131
 132         // p1 is now the last piece of the trunk
 133         p1.Y -= 1;
 134
 135         VoxelArea leaves_a(v3s16(-2,-1,-2), v3s16(2,2,2));
 136         //SharedPtr<u8> leaves_d(new u8[leaves_a.getVolume()]);
 137         Buffer<u8> leaves_d(leaves_a.getVolume());
 138         for(s32 i=0; i<leaves_a.getVolume(); i++)
 139                 leaves_d[i] = 0;
 140
 141         // Force leaves at near the end of the trunk
 142         {
 143                 s16 d = 1;
 144                 for(s16 z=-d; z<=d; z++)
 145                 for(s16 y=-d; y<=d; y++)
 146                 for(s16 x=-d; x<=d; x++)
 147                 {
 148                         leaves_d[leaves_a.index(v3s16(x,y,z))] = 1;
 149                 }
 150         }
 151
 152         // Add leaves randomly
 153         for(u32 iii=0; iii<7; iii++)
 154         {
 155                 s16 d = 1;
 156
 157                 v3s16 p(
 158                         myrand_range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X-d),
 159                         myrand_range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y-d),
 160                         myrand_range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z-d)
 161                 );
 162
 163                 for(s16 z=0; z<=d; z++)
 164                 for(s16 y=0; y<=d; y++)
 165                 for(s16 x=0; x<=d; x++)
 166                 {
 167                         leaves_d[leaves_a.index(p+v3s16(x,y,z))] = 1;
 168                 }
 169         }
 170
 171         // Blit leaves to vmanip
 172         for(s16 z=leaves_a.MinEdge.Z; z<=leaves_a.MaxEdge.Z; z++)
 173         for(s16 y=leaves_a.MinEdge.Y; y<=leaves_a.MaxEdge.Y; y++)
 174         for(s16 x=leaves_a.MinEdge.X; x<=leaves_a.MaxEdge.X; x++)
 175         {
 176                 v3s16 p(x,y,z);
 177                 p += p1;
 178                 if(vmanip.m_area.contains(p) == false)
 179                         continue;
 180                 u32 vi = vmanip.m_area.index(p);
 181                 if(vmanip.m_data[vi].getContent() != CONTENT_AIR
 182                                 && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 183                         continue;
 184                 u32 i = leaves_a.index(x,y,z);
 185                 if(leaves_d[i] == 1) {
 186                         bool is_apple = myrand_range(0,99) < 10;
 187                         if(is_apple_tree && is_apple) {
 188                                 vmanip.m_data[vi] = applenode;
 189                         } else {
 190                                 vmanip.m_data[vi] = leavesnode;
 191                         }
 192                 }
 193         }
 194 }
 195
 196 #if 0
 197 static void make_jungletree(VoxelManipulator &vmanip, v3s16 p0,
 198                 INodeDefManager *ndef)
 199 {
 200         MapNode treenode(ndef->getId("mapgen_jungletree"));
 201         MapNode leavesnode(ndef->getId("mapgen_leaves"));
 202
 203         for(s16 x=-1; x<=1; x++)
 204         for(s16 z=-1; z<=1; z++)
 205         {
 206                 if(myrand_range(0, 2) == 0)
 207                         continue;
 208                 v3s16 p1 = p0 + v3s16(x,0,z);
 209                 v3s16 p2 = p0 + v3s16(x,-1,z);
 210                 if(vmanip.m_area.contains(p2)
 211                                 && vmanip.m_data[vmanip.m_area.index(p2)] == CONTENT_AIR)
 212                         vmanip.m_data[vmanip.m_area.index(p2)] = treenode;
 213                 else if(vmanip.m_area.contains(p1))
 214                         vmanip.m_data[vmanip.m_area.index(p1)] = treenode;
 215         }
 216
 217         s16 trunk_h = myrand_range(8, 12);
 218         v3s16 p1 = p0;
 219         for(s16 ii=0; ii<trunk_h; ii++)
 220         {
 221                 if(vmanip.m_area.contains(p1))
 222                         vmanip.m_data[vmanip.m_area.index(p1)] = treenode;
 223                 p1.Y++;
 224         }
 225
 226         // p1 is now the last piece of the trunk
 227         p1.Y -= 1;
 228
 229         VoxelArea leaves_a(v3s16(-3,-2,-3), v3s16(3,2,3));
 230         //SharedPtr<u8> leaves_d(new u8[leaves_a.getVolume()]);
 231         Buffer<u8> leaves_d(leaves_a.getVolume());
 232         for(s32 i=0; i<leaves_a.getVolume(); i++)
 233                 leaves_d[i] = 0;
 234
 235         // Force leaves at near the end of the trunk
 236         {
 237                 s16 d = 1;
 238                 for(s16 z=-d; z<=d; z++)
 239                 for(s16 y=-d; y<=d; y++)
 240                 for(s16 x=-d; x<=d; x++)
 241                 {
 242                         leaves_d[leaves_a.index(v3s16(x,y,z))] = 1;
 243                 }
 244         }
 245
 246         // Add leaves randomly
 247         for(u32 iii=0; iii<30; iii++)
 248         {
 249                 s16 d = 1;
 250
 251                 v3s16 p(
 252                         myrand_range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X-d),
 253                         myrand_range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y-d),
 254                         myrand_range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z-d)
 255                 );
 256
 257                 for(s16 z=0; z<=d; z++)
 258                 for(s16 y=0; y<=d; y++)
 259                 for(s16 x=0; x<=d; x++)
 260                 {
 261                         leaves_d[leaves_a.index(p+v3s16(x,y,z))] = 1;
 262                 }
 263         }
 264
 265         // Blit leaves to vmanip
 266         for(s16 z=leaves_a.MinEdge.Z; z<=leaves_a.MaxEdge.Z; z++)
 267         for(s16 y=leaves_a.MinEdge.Y; y<=leaves_a.MaxEdge.Y; y++)
 268         for(s16 x=leaves_a.MinEdge.X; x<=leaves_a.MaxEdge.X; x++)
 269         {
 270                 v3s16 p(x,y,z);
 271                 p += p1;
 272                 if(vmanip.m_area.contains(p) == false)
 273                         continue;
 274                 u32 vi = vmanip.m_area.index(p);
 275                 if(vmanip.m_data[vi].getContent() != CONTENT_AIR
 276                                 && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 277                         continue;
 278                 u32 i = leaves_a.index(x,y,z);
 279                 if(leaves_d[i] == 1)
 280                         vmanip.m_data[vi] = leavesnode;
 281         }
 282 }
 283
 284 static void make_papyrus(VoxelManipulator &vmanip, v3s16 p0,
 285                 INodeDefManager *ndef)
 286 {
 287         MapNode papyrusnode(ndef->getId("mapgen_papyrus"));
 288
 289         s16 trunk_h = myrand_range(2, 3);
 290         v3s16 p1 = p0;
 291         for(s16 ii=0; ii<trunk_h; ii++)
 292         {
 293                 if(vmanip.m_area.contains(p1))
 294                         vmanip.m_data[vmanip.m_area.index(p1)] = papyrusnode;
 295                 p1.Y++;
 296         }
 297 }
 298
 299 static void make_cactus(VoxelManipulator &vmanip, v3s16 p0,
 300                 INodeDefManager *ndef)
 301 {
 302         MapNode cactusnode(ndef->getId("mapgen_cactus"));
 303
 304         s16 trunk_h = 3;
 305         v3s16 p1 = p0;
 306         for(s16 ii=0; ii<trunk_h; ii++)
 307         {
 308                 if(vmanip.m_area.contains(p1))
 309                         vmanip.m_data[vmanip.m_area.index(p1)] = cactusnode;
 310                 p1.Y++;
 311         }
 312 }
 313 #endif
 314
 315 #if 0
 316 /*
 317         Dungeon making routines
 318 */
 319
 320 #define VMANIP_FLAG_DUNGEON_INSIDE VOXELFLAG_CHECKED1
 321 #define VMANIP_FLAG_DUNGEON_PRESERVE VOXELFLAG_CHECKED2
 322 #define VMANIP_FLAG_DUNGEON_UNTOUCHABLE (\
 323                 VMANIP_FLAG_DUNGEON_INSIDE|VMANIP_FLAG_DUNGEON_PRESERVE)
 324
 325 static void make_room1(VoxelManipulator &vmanip, v3s16 roomsize, v3s16 roomplace,
 326                 INodeDefManager *ndef)
 327 {
 328         // Make +-X walls
 329         for(s16 z=0; z<roomsize.Z; z++)
 330         for(s16 y=0; y<roomsize.Y; y++)
 331         {
 332                 {
 333                         v3s16 p = roomplace + v3s16(0,y,z);
 334                         if(vmanip.m_area.contains(p) == false)
 335                                 continue;
 336                         u32 vi = vmanip.m_area.index(p);
 337                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 338                                 continue;
 339                         vmanip.m_data[vi] = MapNode(ndef->getId("mapgen_cobble"));
 340                 }
 341                 {
 342                         v3s16 p = roomplace + v3s16(roomsize.X-1,y,z);
 343                         if(vmanip.m_area.contains(p) == false)
 344                                 continue;
 345                         u32 vi = vmanip.m_area.index(p);
 346                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 347                                 continue;
 348                         vmanip.m_data[vi] = MapNode(ndef->getId("mapgen_cobble"));
 349                 }
 350         }
 351
 352         // Make +-Z walls
 353         for(s16 x=0; x<roomsize.X; x++)
 354         for(s16 y=0; y<roomsize.Y; y++)
 355         {
 356                 {
 357                         v3s16 p = roomplace + v3s16(x,y,0);
 358                         if(vmanip.m_area.contains(p) == false)
 359                                 continue;
 360                         u32 vi = vmanip.m_area.index(p);
 361                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 362                                 continue;
 363                         vmanip.m_data[vi] = MapNode(ndef->getId("mapgen_cobble"));
 364                 }
 365                 {
 366                         v3s16 p = roomplace + v3s16(x,y,roomsize.Z-1);
 367                         if(vmanip.m_area.contains(p) == false)
 368                                 continue;
 369                         u32 vi = vmanip.m_area.index(p);
 370                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 371                                 continue;
 372                         vmanip.m_data[vi] = MapNode(ndef->getId("mapgen_cobble"));
 373                 }
 374         }
 375
 376         // Make +-Y walls (floor and ceiling)
 377         for(s16 z=0; z<roomsize.Z; z++)
 378         for(s16 x=0; x<roomsize.X; x++)
 379         {
 380                 {
 381                         v3s16 p = roomplace + v3s16(x,0,z);
 382                         if(vmanip.m_area.contains(p) == false)
 383                                 continue;
 384                         u32 vi = vmanip.m_area.index(p);
 385                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 386                                 continue;
 387                         vmanip.m_data[vi] = MapNode(ndef->getId("mapgen_cobble"));
 388                 }
 389                 {
 390                         v3s16 p = roomplace + v3s16(x,roomsize.Y-1,z);
 391                         if(vmanip.m_area.contains(p) == false)
 392                                 continue;
 393                         u32 vi = vmanip.m_area.index(p);
 394                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 395                                 continue;
 396                         vmanip.m_data[vi] = MapNode(ndef->getId("mapgen_cobble"));
 397                 }
 398         }
 399
 400         // Fill with air
 401         for(s16 z=1; z<roomsize.Z-1; z++)
 402         for(s16 y=1; y<roomsize.Y-1; y++)
 403         for(s16 x=1; x<roomsize.X-1; x++)
 404         {
 405                 v3s16 p = roomplace + v3s16(x,y,z);
 406                 if(vmanip.m_area.contains(p) == false)
 407                         continue;
 408                 u32 vi = vmanip.m_area.index(p);
 409                 vmanip.m_flags[vi] |= VMANIP_FLAG_DUNGEON_UNTOUCHABLE;
 410                 vmanip.m_data[vi] = MapNode(CONTENT_AIR);
 411         }
 412 }
 413
 414 static void make_fill(VoxelManipulator &vmanip, v3s16 place, v3s16 size,
 415                 u8 avoid_flags, MapNode n, u8 or_flags)
 416 {
 417         for(s16 z=0; z<size.Z; z++)
 418         for(s16 y=0; y<size.Y; y++)
 419         for(s16 x=0; x<size.X; x++)
 420         {
 421                 v3s16 p = place + v3s16(x,y,z);
 422                 if(vmanip.m_area.contains(p) == false)
 423                         continue;
 424                 u32 vi = vmanip.m_area.index(p);
 425                 if(vmanip.m_flags[vi] & avoid_flags)
 426                         continue;
 427                 vmanip.m_flags[vi] |= or_flags;
 428                 vmanip.m_data[vi] = n;
 429         }
 430 }
 431
 432 static void make_hole1(VoxelManipulator &vmanip, v3s16 place,
 433                 INodeDefManager *ndef)
 434 {
 435         make_fill(vmanip, place, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 436                         VMANIP_FLAG_DUNGEON_INSIDE);
 437 }
 438
 439 static void make_door1(VoxelManipulator &vmanip, v3s16 doorplace, v3s16 doordir,
 440                 INodeDefManager *ndef)
 441 {
 442         make_hole1(vmanip, doorplace, ndef);
 443         // Place torch (for testing)
 444         //vmanip.m_data[vmanip.m_area.index(doorplace)] = MapNode(ndef->getId("mapgen_torch"));
 445 }
 446
 447 static v3s16 rand_ortho_dir(PseudoRandom &random)
 448 {
 449         if(random.next()%2==0)
 450                 return random.next()%2 ? v3s16(-1,0,0) : v3s16(1,0,0);
 451         else
 452                 return random.next()%2 ? v3s16(0,0,-1) : v3s16(0,0,1);
 453 }
 454
 455 static v3s16 turn_xz(v3s16 olddir, int t)
 456 {
 457         v3s16 dir;
 458         if(t == 0)
 459         {
 460                 // Turn right
 461                 dir.X = olddir.Z;
 462                 dir.Z = -olddir.X;
 463                 dir.Y = olddir.Y;
 464         }
 465         else
 466         {
 467                 // Turn left
 468                 dir.X = -olddir.Z;
 469                 dir.Z = olddir.X;
 470                 dir.Y = olddir.Y;
 471         }
 472         return dir;
 473 }
 474
 475 static v3s16 random_turn(PseudoRandom &random, v3s16 olddir)
 476 {
 477         int turn = random.range(0,2);
 478         v3s16 dir;
 479         if(turn == 0)
 480         {
 481                 // Go straight
 482                 dir = olddir;
 483         }
 484         else if(turn == 1)
 485                 // Turn right
 486                 dir = turn_xz(olddir, 0);
 487         else
 488                 // Turn left
 489                 dir = turn_xz(olddir, 1);
 490         return dir;
 491 }
 492
 493 static void make_corridor(VoxelManipulator &vmanip, v3s16 doorplace,
 494                 v3s16 doordir, v3s16 &result_place, v3s16 &result_dir,
 495                 PseudoRandom &random, INodeDefManager *ndef)
 496 {
 497         make_hole1(vmanip, doorplace, ndef);
 498         v3s16 p0 = doorplace;
 499         v3s16 dir = doordir;
 500         u32 length;
 501         if(random.next()%2)
 502                 length = random.range(1,13);
 503         else
 504                 length = random.range(1,6);
 505         length = random.range(1,13);
 506         u32 partlength = random.range(1,13);
 507         u32 partcount = 0;
 508         s16 make_stairs = 0;
 509         if(random.next()%2 == 0 && partlength >= 3)
 510                 make_stairs = random.next()%2 ? 1 : -1;
 511         for(u32 i=0; i<length; i++)
 512         {
 513                 v3s16 p = p0 + dir;
 514                 if(partcount != 0)
 515                         p.Y += make_stairs;
 516
 517                 /*// If already empty
 518                 if(vmanip.getNodeNoExNoEmerge(p).getContent()
 519                                 == CONTENT_AIR
 520                 && vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).getContent()
 521                                 == CONTENT_AIR)
 522                 {
 523                 }*/
 524
 525                 if(vmanip.m_area.contains(p) == true
 526                                 && vmanip.m_area.contains(p+v3s16(0,1,0)) == true)
 527                 {
 528                         if(make_stairs)
 529                         {
 530                                 make_fill(vmanip, p+v3s16(-1,-1,-1), v3s16(3,5,3),
 531                                                 VMANIP_FLAG_DUNGEON_UNTOUCHABLE, MapNode(ndef->getId("mapgen_cobble")), 0);
 532                                 make_fill(vmanip, p, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 533                                                 VMANIP_FLAG_DUNGEON_INSIDE);
 534                                 make_fill(vmanip, p-dir, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 535                                                 VMANIP_FLAG_DUNGEON_INSIDE);
 536                         }
 537                         else
 538                         {
 539                                 make_fill(vmanip, p+v3s16(-1,-1,-1), v3s16(3,4,3),
 540                                                 VMANIP_FLAG_DUNGEON_UNTOUCHABLE, MapNode(ndef->getId("mapgen_cobble")), 0);
 541                                 make_hole1(vmanip, p, ndef);
 542                                 /*make_fill(vmanip, p, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 543                                                 VMANIP_FLAG_DUNGEON_INSIDE);*/
 544                         }
 545
 546                         p0 = p;
 547                 }
 548                 else
 549                 {
 550                         // Can't go here, turn away
 551                         dir = turn_xz(dir, random.range(0,1));
 552                         make_stairs = -make_stairs;
 553                         partcount = 0;
 554                         partlength = random.range(1,length);
 555                         continue;
 556                 }
 557
 558                 partcount++;
 559                 if(partcount >= partlength)
 560                 {
 561                         partcount = 0;
 562
 563                         dir = random_turn(random, dir);
 564
 565                         partlength = random.range(1,length);
 566
 567                         make_stairs = 0;
 568                         if(random.next()%2 == 0 && partlength >= 3)
 569                                 make_stairs = random.next()%2 ? 1 : -1;
 570                 }
 571         }
 572         result_place = p0;
 573         result_dir = dir;
 574 }
 575
 576 class RoomWalker
 577 {
 578 public:
 579
 580         RoomWalker(VoxelManipulator &vmanip_, v3s16 pos, PseudoRandom &random,
 581                         INodeDefManager *ndef):
 582                         vmanip(vmanip_),
 583                         m_pos(pos),
 584                         m_random(random),
 585                         m_ndef(ndef)
 586         {
 587                 randomizeDir();
 588         }
 589
 590         void randomizeDir()
 591         {
 592                 m_dir = rand_ortho_dir(m_random);
 593         }
 594
 595         void setPos(v3s16 pos)
 596         {
 597                 m_pos = pos;
 598         }
 599
 600         void setDir(v3s16 dir)
 601         {
 602                 m_dir = dir;
 603         }
 604
 605         bool findPlaceForDoor(v3s16 &result_place, v3s16 &result_dir)
 606         {
 607                 for(u32 i=0; i<100; i++)
 608                 {
 609                         v3s16 p = m_pos + m_dir;
 610                         v3s16 p1 = p + v3s16(0,1,0);
 611                         if(vmanip.m_area.contains(p) == false
 612                                         || vmanip.m_area.contains(p1) == false
 613                                         || i % 4 == 0)
 614                         {
 615                                 randomizeDir();
 616                                 continue;
 617                         }
 618                         if(vmanip.getNodeNoExNoEmerge(p).getContent()
 619                                         == m_ndef->getId("mapgen_cobble")
 620                         && vmanip.getNodeNoExNoEmerge(p1).getContent()
 621                                         == m_ndef->getId("mapgen_cobble"))
 622                         {
 623                                 // Found wall, this is a good place!
 624                                 result_place = p;
 625                                 result_dir = m_dir;
 626                                 // Randomize next direction
 627                                 randomizeDir();
 628                                 return true;
 629                         }
 630                         /*
 631                                 Determine where to move next
 632                         */
 633                         // Jump one up if the actual space is there
 634                         if(vmanip.getNodeNoExNoEmerge(p+v3s16(0,0,0)).getContent()
 635                                         == m_ndef->getId("mapgen_cobble")
 636                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).getContent()
 637                                         == CONTENT_AIR
 638                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,2,0)).getContent()
 639                                         == CONTENT_AIR)
 640                                 p += v3s16(0,1,0);
 641                         // Jump one down if the actual space is there
 642                         if(vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).getContent()
 643                                         == m_ndef->getId("mapgen_cobble")
 644                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,0,0)).getContent()
 645                                         == CONTENT_AIR
 646                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,-1,0)).getContent()
 647                                         == CONTENT_AIR)
 648                                 p += v3s16(0,-1,0);
 649                         // Check if walking is now possible
 650                         if(vmanip.getNodeNoExNoEmerge(p).getContent()
 651                                         != CONTENT_AIR
 652                         || vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).getContent()
 653                                         != CONTENT_AIR)
 654                         {
 655                                 // Cannot continue walking here
 656                                 randomizeDir();
 657                                 continue;
 658                         }
 659                         // Move there
 660                         m_pos = p;
 661                 }
 662                 return false;
 663         }
 664
 665         bool findPlaceForRoomDoor(v3s16 roomsize, v3s16 &result_doorplace,
 666                         v3s16 &result_doordir, v3s16 &result_roomplace)
 667         {
 668                 for(s16 trycount=0; trycount<30; trycount++)
 669                 {
 670                         v3s16 doorplace;
 671                         v3s16 doordir;
 672                         bool r = findPlaceForDoor(doorplace, doordir);
 673                         if(r == false)
 674                                 continue;
 675                         v3s16 roomplace;
 676                         // X east, Z north, Y up
 677 #if 1
 678                         if(doordir == v3s16(1,0,0)) // X+
 679                                 roomplace = doorplace +
 680                                                 v3s16(0,-1,m_random.range(-roomsize.Z+2,-2));
 681                         if(doordir == v3s16(-1,0,0)) // X-
 682                                 roomplace = doorplace +
 683                                                 v3s16(-roomsize.X+1,-1,m_random.range(-roomsize.Z+2,-2));
 684                         if(doordir == v3s16(0,0,1)) // Z+
 685                                 roomplace = doorplace +
 686                                                 v3s16(m_random.range(-roomsize.X+2,-2),-1,0);
 687                         if(doordir == v3s16(0,0,-1)) // Z-
 688                                 roomplace = doorplace +
 689                                                 v3s16(m_random.range(-roomsize.X+2,-2),-1,-roomsize.Z+1);
 690 #endif
 691 #if 0
 692                         if(doordir == v3s16(1,0,0)) // X+
 693                                 roomplace = doorplace + v3s16(0,-1,-roomsize.Z/2);
 694                         if(doordir == v3s16(-1,0,0)) // X-
 695                                 roomplace = doorplace + v3s16(-roomsize.X+1,-1,-roomsize.Z/2);
 696                         if(doordir == v3s16(0,0,1)) // Z+
 697                                 roomplace = doorplace + v3s16(-roomsize.X/2,-1,0);
 698                         if(doordir == v3s16(0,0,-1)) // Z-
 699                                 roomplace = doorplace + v3s16(-roomsize.X/2,-1,-roomsize.Z+1);
 700 #endif
 701
 702                         // Check fit
 703                         bool fits = true;
 704                         for(s16 z=1; z<roomsize.Z-1; z++)
 705                         for(s16 y=1; y<roomsize.Y-1; y++)
 706                         for(s16 x=1; x<roomsize.X-1; x++)
 707                         {
 708                                 v3s16 p = roomplace + v3s16(x,y,z);
 709                                 if(vmanip.m_area.contains(p) == false)
 710                                 {
 711                                         fits = false;
 712                                         break;
 713                                 }
 714                                 if(vmanip.m_flags[vmanip.m_area.index(p)]
 715                                                 & VMANIP_FLAG_DUNGEON_INSIDE)
 716                                 {
 717                                         fits = false;
 718                                         break;
 719                                 }
 720                         }
 721                         if(fits == false)
 722                         {
 723                                 // Find new place
 724                                 continue;
 725                         }
 726                         result_doorplace = doorplace;
 727                         result_doordir = doordir;
 728                         result_roomplace = roomplace;
 729                         return true;
 730                 }
 731                 return false;
 732         }
 733
 734 private:
 735         VoxelManipulator &vmanip;
 736         v3s16 m_pos;
 737         v3s16 m_dir;
 738         PseudoRandom &m_random;
 739         INodeDefManager *m_ndef;
 740 };
 741
 742 static void make_dungeon1(VoxelManipulator &vmanip, PseudoRandom &random,
 743                 INodeDefManager *ndef)
 744 {
 745         v3s16 areasize = vmanip.m_area.getExtent();
 746         v3s16 roomsize;
 747         v3s16 roomplace;
 748
 749         /*
 750                 Find place for first room
 751         */
 752         bool fits = false;
 753         for(u32 i=0; i<100; i++)
 754         {
 755                 roomsize = v3s16(random.range(4,8),random.range(4,6),random.range(4,8));
 756                 roomplace = vmanip.m_area.MinEdge + v3s16(
 757                                 random.range(0,areasize.X-roomsize.X-1),
 758                                 random.range(0,areasize.Y-roomsize.Y-1),
 759                                 random.range(0,areasize.Z-roomsize.Z-1));
 760                 /*
 761                         Check that we're not putting the room to an unknown place,
 762                         otherwise it might end up floating in the air
 763                 */
 764                 fits = true;
 765                 for(s16 z=1; z<roomsize.Z-1; z++)
 766                 for(s16 y=1; y<roomsize.Y-1; y++)
 767                 for(s16 x=1; x<roomsize.X-1; x++)
 768                 {
 769                         v3s16 p = roomplace + v3s16(x,y,z);
 770                         u32 vi = vmanip.m_area.index(p);
 771                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_INSIDE)
 772                         {
 773                                 fits = false;
 774                                 break;
 775                         }
 776                         if(vmanip.m_data[vi].getContent() == CONTENT_IGNORE)
 777                         {
 778                                 fits = false;
 779                                 break;
 780                         }
 781                 }
 782                 if(fits)
 783                         break;
 784         }
 785         // No place found
 786         if(fits == false)
 787                 return;
 788
 789         /*
 790                 Stores the center position of the last room made, so that
 791                 a new corridor can be started from the last room instead of
 792                 the new room, if chosen so.
 793         */
 794         v3s16 last_room_center = roomplace+v3s16(roomsize.X/2,1,roomsize.Z/2);
 795
 796         u32 room_count = random.range(2,7);
 797         for(u32 i=0; i<room_count; i++)
 798         {
 799                 // Make a room to the determined place
 800                 make_room1(vmanip, roomsize, roomplace, ndef);
 801
 802                 v3s16 room_center = roomplace + v3s16(roomsize.X/2,1,roomsize.Z/2);
 803
 804                 // Place torch at room center (for testing)
 805                 //vmanip.m_data[vmanip.m_area.index(room_center)] = MapNode(ndef->getId("mapgen_torch"));
 806
 807                 // Quit if last room
 808                 if(i == room_count-1)
 809                         break;
 810
 811                 // Determine walker start position
 812
 813                 bool start_in_last_room = (random.range(0,2)!=0);
 814                 //bool start_in_last_room = true;
 815
 816                 v3s16 walker_start_place;
 817
 818                 if(start_in_last_room)
 819                 {
 820                         walker_start_place = last_room_center;
 821                 }
 822                 else
 823                 {
 824                         walker_start_place = room_center;
 825                         // Store center of current room as the last one
 826                         last_room_center = room_center;
 827                 }
 828
 829                 // Create walker and find a place for a door
 830                 RoomWalker walker(vmanip, walker_start_place, random, ndef);
 831                 v3s16 doorplace;
 832                 v3s16 doordir;
 833                 bool r = walker.findPlaceForDoor(doorplace, doordir);
 834                 if(r == false)
 835                         return;
 836
 837                 if(random.range(0,1)==0)
 838                         // Make the door
 839                         make_door1(vmanip, doorplace, doordir, ndef);
 840                 else
 841                         // Don't actually make a door
 842                         doorplace -= doordir;
 843
 844                 // Make a random corridor starting from the door
 845                 v3s16 corridor_end;
 846                 v3s16 corridor_end_dir;
 847                 make_corridor(vmanip, doorplace, doordir, corridor_end,
 848                                 corridor_end_dir, random, ndef);
 849
 850                 // Find a place for a random sized room
 851                 roomsize = v3s16(random.range(4,8),random.range(4,6),random.range(4,8));
 852                 walker.setPos(corridor_end);
 853                 walker.setDir(corridor_end_dir);
 854                 r = walker.findPlaceForRoomDoor(roomsize, doorplace, doordir, roomplace);
 855                 if(r == false)
 856                         return;
 857
 858                 if(random.range(0,1)==0)
 859                         // Make the door
 860                         make_door1(vmanip, doorplace, doordir, ndef);
 861                 else
 862                         // Don't actually make a door
 863                         roomplace -= doordir;
 864
 865         }
 866 }
 867 #endif
 868
 869 #if 0
 870 static void make_nc(VoxelManipulator &vmanip, PseudoRandom &random,
 871                 INodeDefManager *ndef)
 872 {
 873         v3s16 dir;
 874         u8 facedir_i = 0;
 875         s32 r = random.range(0, 3);
 876         if(r == 0){
 877                 dir = v3s16( 1, 0, 0);
 878                 facedir_i = 3;
 879         }
 880         if(r == 1){
 881                 dir = v3s16(-1, 0, 0);
 882                 facedir_i = 1;
 883         }
 884         if(r == 2){
 885                 dir = v3s16( 0, 0, 1);
 886                 facedir_i = 2;
 887         }
 888         if(r == 3){
 889                 dir = v3s16( 0, 0,-1);
 890                 facedir_i = 0;
 891         }
 892         v3s16 p = vmanip.m_area.MinEdge + v3s16(
 893                         16+random.range(0,15),
 894                         16+random.range(0,15),
 895                         16+random.range(0,15));
 896         vmanip.m_data[vmanip.m_area.index(p)] = MapNode(ndef->getId("mapgen_nyancat"), facedir_i);
 897         u32 length = random.range(3,15);
 898         for(u32 j=0; j<length; j++)
 899         {
 900                 p -= dir;
 901                 vmanip.m_data[vmanip.m_area.index(p)] = MapNode(ndef->getId("mapgen_nyancat_rainbow"));
 902         }
 903 }
 904 #endif
 905
 906 /*
 907         Noise functions. Make sure seed is mangled differently in each one.
 908 */
 909
 910 #if 0
 911 /*
 912         Scaling the output of the noise function affects the overdrive of the
 913         contour function, which affects the shape of the output considerably.
 914 */
 915 #define CAVE_NOISE_SCALE 12.0
 916 //#define CAVE_NOISE_SCALE 10.0
 917 //#define CAVE_NOISE_SCALE 7.5
 918 //#define CAVE_NOISE_SCALE 5.0
 919 //#define CAVE_NOISE_SCALE 1.0
 920
 921 //#define CAVE_NOISE_THRESHOLD (2.5/CAVE_NOISE_SCALE)
 922 #define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE)
 923
 924 NoiseParams get_cave_noise1_params(u64 seed)
 925 {
 926         /*return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 5, 0.7,
 927                         200, CAVE_NOISE_SCALE);*/
 928         /*return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 4, 0.7,
 929                         100, CAVE_NOISE_SCALE);*/
 930         /*return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 5, 0.6,
 931                         100, CAVE_NOISE_SCALE);*/
 932         /*return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 5, 0.3,
 933                         100, CAVE_NOISE_SCALE);*/
 934         return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 4, 0.5,
 935                         50, CAVE_NOISE_SCALE);
 936         //return NoiseParams(NOISE_CONSTANT_ONE);
 937 }
 938
 939 NoiseParams get_cave_noise2_params(u64 seed)
 940 {
 941         /*return NoiseParams(NOISE_PERLIN_CONTOUR_FLIP_YZ, seed+10325, 5, 0.7,
 942                         200, CAVE_NOISE_SCALE);*/
 943         /*return NoiseParams(NOISE_PERLIN_CONTOUR_FLIP_YZ, seed+10325, 4, 0.7,
 944                         100, CAVE_NOISE_SCALE);*/
 945         /*return NoiseParams(NOISE_PERLIN_CONTOUR_FLIP_YZ, seed+10325, 5, 0.3,
 946                         100, CAVE_NOISE_SCALE);*/
 947         return NoiseParams(NOISE_PERLIN_CONTOUR_FLIP_YZ, seed+10325, 4, 0.5,
 948                         50, CAVE_NOISE_SCALE);
 949         //return NoiseParams(NOISE_CONSTANT_ONE);
 950 }
 951
 952 NoiseParams get_ground_noise1_params(u64 seed)
 953 {
 954         return NoiseParams(NOISE_PERLIN, seed+983240, 4,
 955                         0.55, 80.0, 40.0);
 956 }
 957
 958 NoiseParams get_ground_crumbleness_params(u64 seed)
 959 {
 960         return NoiseParams(NOISE_PERLIN, seed+34413, 3,
 961                         1.3, 20.0, 1.0);
 962 }
 963
 964 NoiseParams get_ground_wetness_params(u64 seed)
 965 {
 966         return NoiseParams(NOISE_PERLIN, seed+32474, 4,
 967                         1.1, 40.0, 1.0);
 968 }
 969
 970 bool is_cave(u64 seed, v3s16 p)
 971 {
 972         double d1 = noise3d_param(get_cave_noise1_params(seed), p.X,p.Y,p.Z);
 973         double d2 = noise3d_param(get_cave_noise2_params(seed), p.X,p.Y,p.Z);
 974         return d1*d2 > CAVE_NOISE_THRESHOLD;
 975 }
 976
 977 /*
 978         Ground density noise shall be interpreted by using this.
 979
 980         TODO: No perlin noises here, they should be outsourced
 981               and buffered
 982                   NOTE: The speed of these actually isn't terrible
 983 */
 984 bool val_is_ground(double ground_noise1_val, v3s16 p, u64 seed)
 985 {
 986         //return ((double)p.Y < ground_noise1_val);
 987
 988         double f = 0.55 + noise2d_perlin(
 989                         0.5+(float)p.X/250, 0.5+(float)p.Z/250,
 990                         seed+920381, 3, 0.45);
 991         if(f < 0.01)
 992                 f = 0.01;
 993         else if(f >= 1.0)
 994                 f *= 1.6;
 995         double h = WATER_LEVEL + 10 * noise2d_perlin(
 996                         0.5+(float)p.X/250, 0.5+(float)p.Z/250,
 997                         seed+84174, 4, 0.5);
 998         /*double f = 1;
 999         double h = 0;*/
1000         return ((double)p.Y - h < ground_noise1_val * f);
1001 }
1002
1003 /*
1004         Queries whether a position is ground or not.
1005 */
1006 bool is_ground(u64 seed, v3s16 p)
1007 {
1008         double val1 = noise3d_param(get_ground_noise1_params(seed), p.X,p.Y,p.Z);
1009         return val_is_ground(val1, p, seed);
1010 }
1011 #endif
1012
1013 // Amount of trees per area in nodes
1014 double tree_amount_2d(u64 seed, v2s16 p)
1015 {
1016         /*double noise = noise2d_perlin(
1017                         0.5+(float)p.X/250, 0.5+(float)p.Y/250,
1018                         seed+2, 5, 0.66);*/
1019         double noise = noise2d_perlin(
1020                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
1021                         seed+2, 4, 0.66);
1022         double zeroval = -0.39;
1023         if(noise < zeroval)
1024                 return 0;
1025         else
1026                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
1027 }
1028
1029 #if 0
1030 double surface_humidity_2d(u64 seed, v2s16 p)
1031 {
1032         double noise = noise2d_perlin(
1033                         0.5+(float)p.X/500, 0.5+(float)p.Y/500,
1034                         seed+72384, 4, 0.66);
1035         noise = (noise + 1.0)/2.0;
1036         if(noise < 0.0)
1037                 noise = 0.0;
1038         if(noise > 1.0)
1039                 noise = 1.0;
1040         return noise;
1041 }
1042
1043 /*
1044         Incrementally find ground level from 3d noise
1045 */
1046 s16 find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
1047 {
1048         // Start a bit fuzzy to make averaging lower precision values
1049         // more useful
1050         s16 level = myrand_range(-precision/2, precision/2);
1051         s16 dec[] = {31000, 100, 20, 4, 1, 0};
1052         s16 i;
1053         for(i = 1; dec[i] != 0 && precision <= dec[i]; i++)
1054         {
1055                 // First find non-ground by going upwards
1056                 // Don't stop in caves.
1057                 {
1058                         s16 max = level+dec[i-1]*2;
1059                         v3s16 p(p2d.X, level, p2d.Y);
1060                         for(; p.Y < max; p.Y += dec[i])
1061                         {
1062                                 if(!is_ground(seed, p))
1063                                 {
1064                                         level = p.Y;
1065                                         break;
1066                                 }
1067                         }
1068                 }
1069                 // Then find ground by going downwards from there.
1070                 // Go in caves, too, when precision is 1.
1071                 {
1072                         s16 min = level-dec[i-1]*2;
1073                         v3s16 p(p2d.X, level, p2d.Y);
1074                         for(; p.Y>min; p.Y-=dec[i])
1075                         {
1076                                 bool ground = is_ground(seed, p);
1077                                 /*if(dec[i] == 1 && is_cave(seed, p))
1078                                         ground = false;*/
1079                                 if(ground)
1080                                 {
1081                                         level = p.Y;
1082                                         break;
1083                                 }
1084                         }
1085                 }
1086         }
1087
1088         // This is more like the actual ground level
1089         level += dec[i-1]/2;
1090
1091         return level;
1092 }
1093
1094 double get_sector_average_ground_level(u64 seed, v2s16 sectorpos, double p=4);
1095
1096 double get_sector_average_ground_level(u64 seed, v2s16 sectorpos, double p)
1097 {
1098         v2s16 node_min = sectorpos*MAP_BLOCKSIZE;
1099         v2s16 node_max = (sectorpos+v2s16(1,1))*MAP_BLOCKSIZE-v2s16(1,1);
1100         double a = 0;
1101         a += find_ground_level_from_noise(seed,
1102                         v2s16(node_min.X, node_min.Y), p);
1103         a += find_ground_level_from_noise(seed,
1104                         v2s16(node_min.X, node_max.Y), p);
1105         a += find_ground_level_from_noise(seed,
1106                         v2s16(node_max.X, node_max.Y), p);
1107         a += find_ground_level_from_noise(seed,
1108                         v2s16(node_max.X, node_min.Y), p);
1109         a += find_ground_level_from_noise(seed,
1110                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y+MAP_BLOCKSIZE/2), p);
1111         a /= 5;
1112         return a;
1113 }
1114
1115 double get_sector_maximum_ground_level(u64 seed, v2s16 sectorpos, double p=4);
1116
1117 double get_sector_maximum_ground_level(u64 seed, v2s16 sectorpos, double p)
1118 {
1119         v2s16 node_min = sectorpos*MAP_BLOCKSIZE;
1120         v2s16 node_max = (sectorpos+v2s16(1,1))*MAP_BLOCKSIZE-v2s16(1,1);
1121         double a = -31000;
1122         // Corners
1123         a = MYMAX(a, find_ground_level_from_noise(seed,
1124                         v2s16(node_min.X, node_min.Y), p));
1125         a = MYMAX(a, find_ground_level_from_noise(seed,
1126                         v2s16(node_min.X, node_max.Y), p));
1127         a = MYMAX(a, find_ground_level_from_noise(seed,
1128                         v2s16(node_max.X, node_max.Y), p));
1129         a = MYMAX(a, find_ground_level_from_noise(seed,
1130                         v2s16(node_min.X, node_min.Y), p));
1131         // Center
1132         a = MYMAX(a, find_ground_level_from_noise(seed,
1133                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y+MAP_BLOCKSIZE/2), p));
1134         // Side middle points
1135         a = MYMAX(a, find_ground_level_from_noise(seed,
1136                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y), p));
1137         a = MYMAX(a, find_ground_level_from_noise(seed,
1138                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_max.Y), p));
1139         a = MYMAX(a, find_ground_level_from_noise(seed,
1140                         v2s16(node_min.X, node_min.Y+MAP_BLOCKSIZE/2), p));
1141         a = MYMAX(a, find_ground_level_from_noise(seed,
1142                         v2s16(node_max.X, node_min.Y+MAP_BLOCKSIZE/2), p));
1143         return a;
1144 }
1145
1146 double get_sector_minimum_ground_level(u64 seed, v2s16 sectorpos, double p=4);
1147
1148 double get_sector_minimum_ground_level(u64 seed, v2s16 sectorpos, double p)
1149 {
1150         v2s16 node_min = sectorpos*MAP_BLOCKSIZE;
1151         v2s16 node_max = (sectorpos+v2s16(1,1))*MAP_BLOCKSIZE-v2s16(1,1);
1152         double a = 31000;
1153         // Corners
1154         a = MYMIN(a, find_ground_level_from_noise(seed,
1155                         v2s16(node_min.X, node_min.Y), p));
1156         a = MYMIN(a, find_ground_level_from_noise(seed,
1157                         v2s16(node_min.X, node_max.Y), p));
1158         a = MYMIN(a, find_ground_level_from_noise(seed,
1159                         v2s16(node_max.X, node_max.Y), p));
1160         a = MYMIN(a, find_ground_level_from_noise(seed,
1161                         v2s16(node_min.X, node_min.Y), p));
1162         // Center
1163         a = MYMIN(a, find_ground_level_from_noise(seed,
1164                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y+MAP_BLOCKSIZE/2), p));
1165         // Side middle points
1166         a = MYMIN(a, find_ground_level_from_noise(seed,
1167                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y), p));
1168         a = MYMIN(a, find_ground_level_from_noise(seed,
1169                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_max.Y), p));
1170         a = MYMIN(a, find_ground_level_from_noise(seed,
1171                         v2s16(node_min.X, node_min.Y+MAP_BLOCKSIZE/2), p));
1172         a = MYMIN(a, find_ground_level_from_noise(seed,
1173                         v2s16(node_max.X, node_min.Y+MAP_BLOCKSIZE/2), p));
1174         return a;
1175 }
1176 #endif
1177
1178 // Required by mapgen.h
1179 bool block_is_underground(u64 seed, v3s16 blockpos)
1180 {
1181         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
1182                         seed, v2s16(blockpos.X, blockpos.Z));*/
1183         // Nah, this is just a heuristic, just return something
1184         s16 minimum_groundlevel = WATER_LEVEL;
1185
1186         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
1187                 return true;
1188         else
1189                 return false;
1190 }
1191
1192 #define AVERAGE_MUD_AMOUNT 4
1193
1194 double base_rock_level_2d(u64 seed, v2s16 p)
1195 {
1196         // The base ground level
1197         double base = (double)WATER_LEVEL - (double)AVERAGE_MUD_AMOUNT
1198                         + 20. * noise2d_perlin(
1199                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1200                         seed+82341, 5, 0.6);
1201
1202         /*// A bit hillier one
1203         double base2 = WATER_LEVEL - 4.0 + 40. * noise2d_perlin(
1204                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1205                         seed+93413, 6, 0.69);
1206         if(base2 > base)
1207                 base = base2;*/
1208 #if 1
1209         // Higher ground level
1210         double higher = (double)WATER_LEVEL + 20. + 16. * noise2d_perlin(
1211                         0.5+(float)p.X/500., 0.5+(float)p.Y/500.,
1212                         seed+85039, 5, 0.6);
1213         //higher = 30; // For debugging
1214
1215         // Limit higher to at least base
1216         if(higher < base)
1217                 higher = base;
1218
1219         // Steepness factor of cliffs
1220         double b = 0.85 + 0.5 * noise2d_perlin(
1221                         0.5+(float)p.X/125., 0.5+(float)p.Y/125.,
1222                         seed-932, 5, 0.7);
1223         b = rangelim(b, 0.0, 1000.0);
1224         b = pow(b, 7);
1225         b *= 5;
1226         b = rangelim(b, 0.5, 1000.0);
1227         // Values 1.5...100 give quite horrible looking slopes
1228         if(b > 1.5 && b < 100.0){
1229                 if(b < 10.0)
1230                         b = 1.5;
1231                 else
1232                         b = 100.0;
1233         }
1234         //dstream<<"b="<<b<<std::endl;
1235         //double b = 20;
1236         //b = 0.25;
1237
1238         // Offset to more low
1239         double a_off = -0.20;
1240         // High/low selector
1241         /*double a = 0.5 + b * (a_off + noise2d_perlin(
1242                         0.5+(float)p.X/500., 0.5+(float)p.Y/500.,
1243                         seed+4213, 6, 0.7));*/
1244         double a = (double)0.5 + b * (a_off + noise2d_perlin(
1245                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1246                         seed+4213, 5, 0.69));
1247         // Limit
1248         a = rangelim(a, 0.0, 1.0);
1249
1250         //dstream<<"a="<<a<<std::endl;
1251
1252         double h = base*(1.0-a) + higher*a;
1253 #else
1254         double h = base;
1255 #endif
1256         return h;
1257 }
1258
1259 s16 find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
1260 {
1261         return base_rock_level_2d(seed, p2d) + AVERAGE_MUD_AMOUNT;
1262 }
1263
1264 double get_mud_add_amount(u64 seed, v2s16 p)
1265 {
1266         return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
1267                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
1268                         seed+91013, 3, 0.55));
1269 }
1270
1271 bool get_have_sand(u64 seed, v2s16 p2d)
1272 {
1273         // Determine whether to have sand here
1274         double sandnoise = noise2d_perlin(
1275                         0.5+(float)p2d.X/500, 0.5+(float)p2d.Y/500,
1276                         seed+59420, 3, 0.50);
1277
1278         return (sandnoise > -0.15);
1279 }
1280
1281 u32 get_blockseed(u64 seed, v3s16 p)
1282 {
1283         s32 x=p.X, y=p.Y, z=p.Z;
1284         return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
1285 }
1286
1287 #define VMANIP_FLAG_CAVE VOXELFLAG_CHECKED1
1288
1289 void make_block(BlockMakeData *data)
1290 {
1291         if(data->no_op)
1292         {
1293                 //dstream<<"makeBlock: no-op"<<std::endl;
1294                 return;
1295         }
1296
1297         assert(data->vmanip);
1298         assert(data->nodedef);
1299         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
1300                         data->blockpos_requested.Y >= data->blockpos_min.Y &&
1301                         data->blockpos_requested.Z >= data->blockpos_min.Z);
1302         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
1303                         data->blockpos_requested.Y <= data->blockpos_max.Y &&
1304                         data->blockpos_requested.Z <= data->blockpos_max.Z);
1305
1306         INodeDefManager *ndef = data->nodedef;
1307
1308         // Hack: use minimum block coordinates for old code that assumes
1309         // a single block
1310         v3s16 blockpos = data->blockpos_requested;
1311
1312         /*dstream<<"makeBlock(): ("<<blockpos.X<<","<<blockpos.Y<<","
1313                         <<blockpos.Z<<")"<<std::endl;*/
1314
1315         v3s16 blockpos_min = data->blockpos_min;
1316         v3s16 blockpos_max = data->blockpos_max;
1317         v3s16 blockpos_full_min = blockpos_min - v3s16(1,1,1);
1318         v3s16 blockpos_full_max = blockpos_max + v3s16(1,1,1);
1319
1320         ManualMapVoxelManipulator &vmanip = *(data->vmanip);
1321         // Area of central chunk
1322         v3s16 node_min = blockpos_min*MAP_BLOCKSIZE;
1323         v3s16 node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
1324         // Full allocated area
1325         v3s16 full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
1326         v3s16 full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
1327
1328         v3s16 central_area_size = node_max - node_min + v3s16(1,1,1);
1329
1330         const s16 max_spread_amount = MAP_BLOCKSIZE;
1331
1332         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
1333                         * (blockpos_max.Y - blockpos_min.Y + 1)
1334                         * (blockpos_max.Z - blockpos_max.Z + 1);
1335
1336         int volume_nodes = volume_blocks *
1337                         MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;
1338
1339         // Generated surface area
1340         //double gen_area_nodes = MAP_BLOCKSIZE*MAP_BLOCKSIZE * rel_volume;
1341
1342         // Horribly wrong heuristic, but better than nothing
1343         bool block_is_underground = (WATER_LEVEL > node_max.Y);
1344
1345         /*
1346                 Create a block-specific seed
1347         */
1348         /*u32 blockseed = (u32)(data->seed%0x100000000ULL) + full_node_min.Z*38134234
1349                         + full_node_min.Y*42123 + full_node_min.X*23;*/
1350
1351         /*
1352                 Cache some ground type values for speed
1353         */
1354
1355 // Creates variables c_name=id and n_name=node
1356 #define CONTENT_VARIABLE(ndef, name)\
1357         content_t c_##name = ndef->getId("mapgen_" #name);\
1358         MapNode n_##name(c_##name);
1359
1360         CONTENT_VARIABLE(ndef, stone);
1361         CONTENT_VARIABLE(ndef, air);
1362         CONTENT_VARIABLE(ndef, water_source);
1363         CONTENT_VARIABLE(ndef, dirt);
1364         CONTENT_VARIABLE(ndef, sand);
1365         CONTENT_VARIABLE(ndef, gravel);
1366         CONTENT_VARIABLE(ndef, clay);
1367         CONTENT_VARIABLE(ndef, lava_source);
1368         CONTENT_VARIABLE(ndef, cobble);
1369         CONTENT_VARIABLE(ndef, mossycobble);
1370         CONTENT_VARIABLE(ndef, dirt_with_grass);
1371         CONTENT_VARIABLE(ndef, junglegrass);
1372         CONTENT_VARIABLE(ndef, stone_with_coal);
1373         CONTENT_VARIABLE(ndef, stone_with_iron);
1374         CONTENT_VARIABLE(ndef, mese);
1375
1376         // Maximum height of the stone surface and obstacles.
1377         // This is used to guide the cave generation
1378         s16 stone_surface_max_y = 0;
1379
1380         /*
1381                 Generate general ground level to full area
1382         */
1383         {
1384 #if 1
1385         TimeTaker timer1("Generating ground level");
1386
1387         for(s16 x=node_min.X; x<=node_max.X; x++)
1388         for(s16 z=node_min.Z; z<=node_max.Z; z++)
1389         {
1390                 // Node position
1391                 v2s16 p2d = v2s16(x,z);
1392
1393                 /*
1394                         Skip of already generated
1395                 */
1396                 /*{
1397                         v3s16 p(p2d.X, node_min.Y, p2d.Y);
1398                         if(vmanip.m_data[vmanip.m_area.index(p)].d != CONTENT_AIR)
1399                                 continue;
1400                 }*/
1401
1402                 // Ground height at this point
1403                 float surface_y_f = 0.0;
1404
1405                 // Use perlin noise for ground height
1406                 surface_y_f = base_rock_level_2d(data->seed, p2d);
1407
1408                 /*// Experimental stuff
1409                 {
1410                         float a = highlands_level_2d(data->seed, p2d);
1411                         if(a > surface_y_f)
1412                                 surface_y_f = a;
1413                 }*/
1414
1415                 // Convert to integer
1416                 s16 surface_y = (s16)surface_y_f;
1417
1418                 // Log it
1419                 if(surface_y > stone_surface_max_y)
1420                         stone_surface_max_y = surface_y;
1421
1422                 /*
1423                         Fill ground with stone
1424                 */
1425                 {
1426                         // Use fast index incrementing
1427                         v3s16 em = vmanip.m_area.getExtent();
1428                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_min.Y, p2d.Y));
1429                         for(s16 y=node_min.Y; y<=node_max.Y; y++)
1430                         {
1431                                 if(y <= surface_y){
1432                                         if(vmanip.m_data[i].getContent() == CONTENT_IGNORE)
1433                                                 vmanip.m_data[i] = MapNode(c_stone);
1434                                 } else if(y <= WATER_LEVEL){
1435                                         vmanip.m_data[i] = MapNode(c_water_source);
1436                                 } else {
1437                                         vmanip.m_data[i] = MapNode(c_air);
1438                                 }
1439
1440                                 vmanip.m_area.add_y(em, i, 1);
1441                         }
1442                 }
1443         }
1444 #endif
1445
1446         }//timer1
1447
1448         // Limit dirt flow area by 1 because mud is flown into neighbors.
1449         assert(central_area_size.X == central_area_size.Z);
1450         s16 mudflow_minpos = 0-max_spread_amount+1;
1451         s16 mudflow_maxpos = central_area_size.X+max_spread_amount-2;
1452
1453         /*
1454                 Loop this part, it will make stuff look older and newer nicely
1455         */
1456
1457         const u32 age_loops = 2;
1458         for(u32 i_age=0; i_age<age_loops; i_age++)
1459         { // Aging loop
1460         /******************************
1461                 BEGINNING OF AGING LOOP
1462         ******************************/
1463
1464 #if 1
1465         {
1466         // 24ms @cs=8
1467         //TimeTaker timer1("caves");
1468
1469         /*
1470                 Make caves (this code is relatively horrible)
1471         */
1472         u32 caves_count = volume_nodes / 100000 + 1;
1473         u32 bruises_count = volume_nodes * stone_surface_max_y / 40000000;
1474         if(stone_surface_max_y < WATER_LEVEL - 20)
1475                 bruises_count = 0;
1476         for(u32 jj=0; jj<caves_count+bruises_count; jj++)
1477         {
1478                 s16 min_tunnel_diameter = 2;
1479                 s16 max_tunnel_diameter = myrand_range(4,5);
1480                 u16 tunnel_routepoints = 20;
1481
1482                 v3f main_direction(0,0,0);
1483
1484                 bool bruise_surface = (jj > caves_count);
1485
1486                 if(bruise_surface)
1487                 {
1488                         min_tunnel_diameter = 5;
1489                         max_tunnel_diameter = myrand_range(10, myrand_range(30,50));
1490                         /*min_tunnel_diameter = MYMAX(0, stone_surface_max_y/6);
1491                         max_tunnel_diameter = myrand_range(MYMAX(0, stone_surface_max_y/6), MYMAX(0, stone_surface_max_y/2));*/
1492
1493                         /*s16 tunnel_rou = rangelim(25*(0.5+1.0*noise2d(data->seed+42,
1494                                         data->sectorpos_base.X, data->sectorpos_base.Y)), 0, 15);*/
1495
1496                         tunnel_routepoints = 5;
1497                 }
1498                 else
1499                 {
1500                 }
1501
1502                 // Allowed route area size in nodes
1503                 v3s16 ar = central_area_size;
1504
1505                 // Area starting point in nodes
1506                 v3s16 of = node_min;
1507
1508                 // Allow a bit more
1509                 //(this should be more than the maximum radius of the tunnel)
1510                 //s16 insure = 5; // Didn't work with max_d = 20
1511                 s16 insure = 10;
1512                 s16 more = max_spread_amount - max_tunnel_diameter/2 - insure;
1513                 ar += v3s16(1,0,1) * more * 2;
1514                 of -= v3s16(1,0,1) * more;
1515
1516                 s16 route_y_min = 0;
1517                 // Allow half a diameter + 7 over stone surface
1518                 s16 route_y_max = -of.Y + stone_surface_max_y + max_tunnel_diameter/2 + 7;
1519
1520                 /*// If caves, don't go through surface too often
1521                 if(bruise_surface == false)
1522                         route_y_max -= myrand_range(0, max_tunnel_diameter*2);*/
1523
1524                 // Limit maximum to area
1525                 route_y_max = rangelim(route_y_max, 0, ar.Y-1);
1526
1527                 if(bruise_surface)
1528                 {
1529                         /*// Minimum is at y=0
1530                         route_y_min = -of.Y - 0;*/
1531                         // Minimum is at y=max_tunnel_diameter/4
1532                         //route_y_min = -of.Y + max_tunnel_diameter/4;
1533                         //s16 min = -of.Y + max_tunnel_diameter/4;
1534                         s16 min = -of.Y + 0;
1535                         route_y_min = myrand_range(min, min + max_tunnel_diameter);
1536                         route_y_min = rangelim(route_y_min, 0, route_y_max);
1537                 }
1538
1539                 /*dstream<<"route_y_min = "<<route_y_min
1540                                 <<", route_y_max = "<<route_y_max<<std::endl;*/
1541
1542                 s16 route_start_y_min = route_y_min;
1543                 s16 route_start_y_max = route_y_max;
1544
1545                 // Start every 4th cave from surface when applicable
1546                 bool coming_from_surface = false;
1547                 if(node_min.Y <= 0 && node_max.Y >= 0){
1548                         coming_from_surface = (jj % 4 == 0 && bruise_surface == false);
1549                         if(coming_from_surface)
1550                                 route_start_y_min = -of.Y + stone_surface_max_y + 10;
1551                 }
1552
1553                 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y-1);
1554                 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y-1);
1555
1556                 // Randomize starting position
1557                 v3f orp(
1558                         (float)(myrand()%ar.X)+0.5,
1559                         (float)(myrand_range(route_start_y_min, route_start_y_max))+0.5,
1560                         (float)(myrand()%ar.Z)+0.5
1561                 );
1562
1563                 MapNode airnode(CONTENT_AIR);
1564                 MapNode waternode(c_water_source);
1565
1566                 /*
1567                         Generate some tunnel starting from orp
1568                 */
1569
1570                 for(u16 j=0; j<tunnel_routepoints; j++)
1571                 {
1572                         if(j%7==0 && bruise_surface == false)
1573                         {
1574                                 main_direction = v3f(
1575                                         ((float)(myrand()%20)-(float)10)/10,
1576                                         ((float)(myrand()%20)-(float)10)/30,
1577                                         ((float)(myrand()%20)-(float)10)/10
1578                                 );
1579                                 main_direction *= (float)myrand_range(1, 3);
1580                         }
1581
1582                         // Randomize size
1583                         s16 min_d = min_tunnel_diameter;
1584                         s16 max_d = max_tunnel_diameter;
1585                         s16 rs = myrand_range(min_d, max_d);
1586
1587                         v3s16 maxlen;
1588                         if(bruise_surface)
1589                         {
1590                                 maxlen = v3s16(rs*7,rs*2,rs*7);
1591                         }
1592                         else
1593                         {
1594                                 maxlen = v3s16(rs*4, myrand_range(1, rs*3), rs*4);
1595                         }
1596
1597                         v3f vec;
1598
1599                         if(coming_from_surface && j < 3)
1600                         {
1601                                 vec = v3f(
1602                                         (float)(myrand()%(maxlen.X*2))-(float)maxlen.X,
1603                                         (float)(myrand()%(maxlen.Y*1))-(float)maxlen.Y,
1604                                         (float)(myrand()%(maxlen.Z*2))-(float)maxlen.Z
1605                                 );
1606                         }
1607                         else
1608                         {
1609                                 vec = v3f(
1610                                         (float)(myrand()%(maxlen.X*2))-(float)maxlen.X,
1611                                         (float)(myrand()%(maxlen.Y*2))-(float)maxlen.Y,
1612                                         (float)(myrand()%(maxlen.Z*2))-(float)maxlen.Z
1613                                 );
1614                         }
1615
1616                         if(bruise_surface){
1617                                 v3f p = orp + vec;
1618                                 s16 h = find_ground_level_clever(vmanip,
1619                                                 v2s16(p.X, p.Z), ndef);
1620                                 route_y_min = h - rs/3;
1621                                 route_y_max = h + rs;
1622                         }
1623
1624                         vec += main_direction;
1625
1626                         v3f rp = orp + vec;
1627                         if(rp.X < 0)
1628                                 rp.X = 0;
1629                         else if(rp.X >= ar.X)
1630                                 rp.X = ar.X-1;
1631                         if(rp.Y < route_y_min)
1632                                 rp.Y = route_y_min;
1633                         else if(rp.Y >= route_y_max)
1634                                 rp.Y = route_y_max-1;
1635                         if(rp.Z < 0)
1636                                 rp.Z = 0;
1637                         else if(rp.Z >= ar.Z)
1638                                 rp.Z = ar.Z-1;
1639                         vec = rp - orp;
1640
1641                         for(float f=0; f<1.0; f+=1.0/vec.getLength())
1642                         {
1643                                 v3f fp = orp + vec * f;
1644                                 fp.X += 0.1*myrand_range(-10,10);
1645                                 fp.Z += 0.1*myrand_range(-10,10);
1646                                 v3s16 cp(fp.X, fp.Y, fp.Z);
1647
1648                                 s16 d0 = -rs/2;
1649                                 s16 d1 = d0 + rs - 1;
1650                                 for(s16 z0=d0; z0<=d1; z0++)
1651                                 {
1652                                         s16 si = rs - MYMAX(0, abs(z0)-rs/4);
1653                                         //s16 si = rs - MYMAX(0, abs(z0)-rs/7);
1654                                         for(s16 x0=-si; x0<=si-1; x0++)
1655                                         {
1656                                                 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
1657                                                 //s16 si2 = rs - MYMAX(0, maxabsxz-rs/4);
1658                                                 s16 si2 = rs - MYMAX(0, maxabsxz-rs/7);
1659                                                 //s16 si2 = rs - abs(x0);
1660                                                 for(s16 y0=-si2; y0<=si2-1; y0++)
1661                                                 {
1662                                                         // Make better floors
1663                                                         if(y0 < -rs + 1 && abs(x0)<=1 && abs(z0)<=1)
1664                                                                 continue;
1665
1666                                                         s16 z = cp.Z + z0;
1667                                                         s16 y = cp.Y + y0;
1668                                                         s16 x = cp.X + x0;
1669                                                         v3s16 p(x,y,z);
1670                                                         /*if(isInArea(p, ar) == false)
1671                                                                 continue;*/
1672                                                         // Check only height
1673                                                         if(y < 0 || y >= ar.Y)
1674                                                                 continue;
1675                                                         p += of;
1676
1677                                                         //assert(vmanip.m_area.contains(p));
1678                                                         if(vmanip.m_area.contains(p) == false)
1679                                                         {
1680                                                                 dstream<<"WARNING: "<<__FUNCTION_NAME
1681                                                                                 <<":"<<__LINE__<<": "
1682                                                                                 <<"point not in area"
1683                                                                                 <<std::endl;
1684                                                                 continue;
1685                                                         }
1686
1687                                                         // Just set it to air, it will be changed to
1688                                                         // water afterwards
1689                                                         u32 i = vmanip.m_area.index(p);
1690                                                         if(bruise_surface){
1691                                                                 if(p.Y <= WATER_LEVEL)
1692                                                                         vmanip.m_data[i] = waternode;
1693                                                                 else
1694                                                                         vmanip.m_data[i] = airnode;
1695                                                         } else {
1696                                                                 vmanip.m_data[i] = airnode;
1697                                                         }
1698
1699                                                         if(bruise_surface == false)
1700                                                         {
1701                                                                 // Set tunnel flag
1702                                                                 vmanip.m_flags[i] |= VMANIP_FLAG_CAVE;
1703                                                         }
1704                                                 }
1705                                         }
1706                                 }
1707                         }
1708
1709                         orp = rp;
1710                 }
1711
1712         }
1713
1714         }//timer1
1715 #endif
1716
1717 #if 1
1718         {
1719         // 15ms @cs=8
1720         TimeTaker timer1("add mud");
1721
1722         /*
1723                 Add mud to the central chunk
1724         */
1725
1726         for(s16 x=node_min.X; x<=node_max.X; x++)
1727         for(s16 z=node_min.Z; z<=node_max.Z; z++)
1728         {
1729                 // Node position in 2d
1730                 v2s16 p2d = v2s16(x,z);
1731
1732                 MapNode addnode(c_dirt);
1733
1734                 // Randomize mud amount
1735                 s16 mud_add_amount = get_mud_add_amount(data->seed, p2d) / 2.0;
1736
1737                 if(mud_add_amount <= 0){
1738                         mud_add_amount = 1 - mud_add_amount;
1739                         addnode = MapNode(c_gravel);
1740                 }
1741
1742                 // Find ground level
1743                 s16 surface_y = find_stone_level(vmanip, p2d, ndef);
1744                 // Handle area not found
1745                 if(surface_y == vmanip.m_area.MinEdge.Y - 1)
1746                         continue;
1747
1748                 /*
1749                         If topmost node is grass, change it to mud.
1750                         It might be if it was flown to there from a neighboring
1751                         chunk and then converted.
1752                 */
1753                 {
1754                         u32 i = vmanip.m_area.index(v3s16(p2d.X, surface_y, p2d.Y));
1755                         MapNode *n = &vmanip.m_data[i];
1756                         if(n->getContent() == c_dirt_with_grass)
1757                                 *n = MapNode(c_dirt);
1758                 }
1759
1760                 /*
1761                         Add mud on ground
1762                 */
1763                 {
1764                         s16 mudcount = 0;
1765                         v3s16 em = vmanip.m_area.getExtent();
1766                         s16 y_start = surface_y+1;
1767                         u32 i = vmanip.m_area.index(v3s16(p2d.X, y_start, p2d.Y));
1768                         for(s16 y=y_start; y<=node_max.Y; y++)
1769                         {
1770                                 if(mudcount >= mud_add_amount)
1771                                         break;
1772
1773                                 MapNode &n = vmanip.m_data[i];
1774                                 n = addnode;
1775                                 mudcount++;
1776
1777                                 vmanip.m_area.add_y(em, i, 1);
1778                         }
1779                 }
1780
1781         }
1782
1783         }//timer1
1784 #endif
1785
1786 #if 1
1787         {
1788         // 340ms @cs=8
1789         TimeTaker timer1("flow mud");
1790
1791         /*
1792                 Flow mud away from steep edges
1793         */
1794
1795         // Iterate a few times
1796         for(s16 k=0; k<3; k++)
1797         {
1798
1799         for(s16 x=mudflow_minpos; x<=mudflow_maxpos; x++)
1800         for(s16 z=mudflow_minpos; z<=mudflow_maxpos; z++)
1801         {
1802                 // Invert coordinates every 2nd iteration
1803                 if(k%2 == 0)
1804                 {
1805                         x = mudflow_maxpos - (x-mudflow_minpos);
1806                         z = mudflow_maxpos - (z-mudflow_minpos);
1807                 }
1808
1809                 // Node position in 2d
1810                 v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x,z);
1811
1812                 v3s16 em = vmanip.m_area.getExtent();
1813                 u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
1814                 s16 y=node_max.Y;
1815
1816                 for(;; y--)
1817                 {
1818                         MapNode *n = NULL;
1819                         // Find mud
1820                         for(; y>=node_min.Y; y--)
1821                         {
1822                                 n = &vmanip.m_data[i];
1823                                 //if(content_walkable(n->d))
1824                                 //      break;
1825                                 if(n->getContent() == c_dirt ||
1826                                                 n->getContent() == c_dirt_with_grass)
1827                                         break;
1828
1829                                 vmanip.m_area.add_y(em, i, -1);
1830                         }
1831
1832                         // Stop if out of area
1833                         //if(vmanip.m_area.contains(i) == false)
1834                         if(y < node_min.Y)
1835                                 break;
1836
1837                         /*// If not mud, do nothing to it
1838                         MapNode *n = &vmanip.m_data[i];
1839                         if(n->d != CONTENT_MUD && n->d != CONTENT_GRASS)
1840                                 continue;*/
1841
1842                         /*
1843                                 Don't flow it if the stuff under it is not mud
1844                         */
1845                         {
1846                                 u32 i2 = i;
1847                                 vmanip.m_area.add_y(em, i2, -1);
1848                                 // Cancel if out of area
1849                                 if(vmanip.m_area.contains(i2) == false)
1850                                         continue;
1851                                 MapNode *n2 = &vmanip.m_data[i2];
1852                                 if(n2->getContent() != c_dirt &&
1853                                                 n2->getContent() != c_dirt_with_grass)
1854                                         continue;
1855                         }
1856
1857                         // Make it exactly mud
1858                         n->setContent(c_dirt);
1859
1860                         /*s16 recurse_count = 0;
1861         mudflow_recurse:*/
1862
1863                         v3s16 dirs4[4] = {
1864                                 v3s16(0,0,1), // back
1865                                 v3s16(1,0,0), // right
1866                                 v3s16(0,0,-1), // front
1867                                 v3s16(-1,0,0), // left
1868                         };
1869
1870                         // Theck that upper is air or doesn't exist.
1871                         // Cancel dropping if upper keeps it in place
1872                         u32 i3 = i;
1873                         vmanip.m_area.add_y(em, i3, 1);
1874                         if(vmanip.m_area.contains(i3) == true
1875                                         && ndef->get(vmanip.m_data[i3]).walkable)
1876                         {
1877                                 continue;
1878                         }
1879
1880                         // Drop mud on side
1881
1882                         for(u32 di=0; di<4; di++)
1883                         {
1884                                 v3s16 dirp = dirs4[di];
1885                                 u32 i2 = i;
1886                                 // Move to side
1887                                 vmanip.m_area.add_p(em, i2, dirp);
1888                                 // Fail if out of area
1889                                 if(vmanip.m_area.contains(i2) == false)
1890                                         continue;
1891                                 // Check that side is air
1892                                 MapNode *n2 = &vmanip.m_data[i2];
1893                                 if(ndef->get(*n2).walkable)
1894                                         continue;
1895                                 // Check that under side is air
1896                                 vmanip.m_area.add_y(em, i2, -1);
1897                                 if(vmanip.m_area.contains(i2) == false)
1898                                         continue;
1899                                 n2 = &vmanip.m_data[i2];
1900                                 if(ndef->get(*n2).walkable)
1901                                         continue;
1902                                 /*// Check that under that is air (need a drop of 2)
1903                                 vmanip.m_area.add_y(em, i2, -1);
1904                                 if(vmanip.m_area.contains(i2) == false)
1905                                         continue;
1906                                 n2 = &vmanip.m_data[i2];
1907                                 if(content_walkable(n2->d))
1908                                         continue;*/
1909                                 // Loop further down until not air
1910                                 bool dropped_to_unknown = false;
1911                                 do{
1912                                         vmanip.m_area.add_y(em, i2, -1);
1913                                         n2 = &vmanip.m_data[i2];
1914                                         // if out of known area
1915                                         if(vmanip.m_area.contains(i2) == false
1916                                                         || n2->getContent() == CONTENT_IGNORE){
1917                                                 dropped_to_unknown = true;
1918                                                 break;
1919                                         }
1920                                 }while(ndef->get(*n2).walkable == false);
1921                                 // Loop one up so that we're in air
1922                                 vmanip.m_area.add_y(em, i2, 1);
1923                                 n2 = &vmanip.m_data[i2];
1924
1925                                 bool old_is_water = (n->getContent() == c_water_source);
1926                                 // Move mud to new place
1927                                 if(!dropped_to_unknown)
1928                                         *n2 = *n;
1929                                 // Set old place to be air (or water)
1930                                 if(old_is_water)
1931                                         *n = MapNode(c_water_source);
1932                                 else
1933                                         *n = MapNode(CONTENT_AIR);
1934
1935                                 // Done
1936                                 break;
1937                         }
1938                 }
1939         }
1940
1941         }
1942
1943         }//timer1
1944 #endif
1945
1946         } // Aging loop
1947         /***********************
1948                 END OF AGING LOOP
1949         ************************/
1950
1951         /*
1952                 Add top and bottom side of water to transforming_liquid queue
1953         */
1954
1955         for(s16 x=full_node_min.X; x<=full_node_max.X; x++)
1956         for(s16 z=full_node_min.Z; z<=full_node_max.Z; z++)
1957         {
1958                 // Node position
1959                 v2s16 p2d(x,z);
1960                 {
1961                         bool water_found = false;
1962                         // Use fast index incrementing
1963                         v3s16 em = vmanip.m_area.getExtent();
1964                         u32 i = vmanip.m_area.index(v3s16(p2d.X, full_node_max.Y, p2d.Y));
1965                         for(s16 y=full_node_max.Y; y>=full_node_min.Y; y--)
1966                         {
1967                                 if(water_found == false)
1968                                 {
1969                                         if(vmanip.m_data[i].getContent() == c_water_source)
1970                                         {
1971                                                 v3s16 p = v3s16(p2d.X, y, p2d.Y);
1972                                                 data->transforming_liquid.push_back(p);
1973                                                 water_found = true;
1974                                         }
1975                                 }
1976                                 else
1977                                 {
1978                                         // This can be done because water_found can only
1979                                         // turn to true and end up here after going through
1980                                         // a single block.
1981                                         if(vmanip.m_data[i+1].getContent() != c_water_source)
1982                                         {
1983                                                 v3s16 p = v3s16(p2d.X, y+1, p2d.Y);
1984                                                 data->transforming_liquid.push_back(p);
1985                                                 water_found = false;
1986                                         }
1987                                 }
1988
1989                                 vmanip.m_area.add_y(em, i, -1);
1990                         }
1991                 }
1992         }
1993
1994         /*
1995                 Grow grass
1996         */
1997
1998         for(s16 x=full_node_min.X; x<=full_node_max.X; x++)
1999         for(s16 z=full_node_min.Z; z<=full_node_max.Z; z++)
2000         {
2001                 // Node position in 2d
2002                 v2s16 p2d = v2s16(x,z);
2003
2004                 /*
2005                         Find the lowest surface to which enough light ends up
2006                         to make grass grow.
2007
2008                         Basically just wait until not air and not leaves.
2009                 */
2010                 s16 surface_y = 0;
2011                 {
2012                         v3s16 em = vmanip.m_area.getExtent();
2013                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
2014                         s16 y;
2015                         // Go to ground level
2016                         for(y=node_max.Y; y>=full_node_min.Y; y--)
2017                         {
2018                                 MapNode &n = vmanip.m_data[i];
2019                                 if(ndef->get(n).param_type != CPT_LIGHT
2020                                                 || ndef->get(n).liquid_type != LIQUID_NONE)
2021                                         break;
2022                                 vmanip.m_area.add_y(em, i, -1);
2023                         }
2024                         if(y >= full_node_min.Y)
2025                                 surface_y = y;
2026                         else
2027                                 surface_y = full_node_min.Y;
2028                 }
2029
2030                 u32 i = vmanip.m_area.index(p2d.X, surface_y, p2d.Y);
2031                 MapNode *n = &vmanip.m_data[i];
2032                 if(n->getContent() == c_dirt)
2033                         n->setContent(c_dirt_with_grass);
2034         }
2035
2036         /*
2037                 Generate some trees
2038         */
2039         assert(central_area_size.X == central_area_size.Z);
2040         {
2041                 // Divide area into parts
2042                 s16 div = 8;
2043                 s16 sidelen = central_area_size.X / div;
2044                 double area = sidelen * sidelen;
2045                 for(s16 x0=0; x0<div; x0++)
2046                 for(s16 z0=0; z0<div; z0++)
2047                 {
2048                         // Center position of part of division
2049                         v2s16 p2d_center(
2050                                 node_min.X + sidelen/2 + sidelen*x0,
2051                                 node_min.Z + sidelen/2 + sidelen*z0
2052                         );
2053                         // Minimum edge of part of division
2054                         v2s16 p2d_min(
2055                                 node_min.X + sidelen*x0,
2056                                 node_min.Z + sidelen*z0
2057                         );
2058                         // Maximum edge of part of division
2059                         v2s16 p2d_max(
2060                                 node_min.X + sidelen + sidelen*x0 - 1,
2061                                 node_min.Z + sidelen + sidelen*z0 - 1
2062                         );
2063                         // Amount of trees
2064                         u32 tree_count = area * tree_amount_2d(data->seed, p2d_center);
2065                         // Put trees in random places on part of division
2066                         for(u32 i=0; i<tree_count; i++)
2067                         {
2068                                 s16 x = myrand_range(p2d_min.X, p2d_max.X);
2069                                 s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
2070                                 s16 y = find_ground_level(vmanip, v2s16(x,z), ndef);
2071                                 // Don't make a tree under water level
2072                                 if(y < WATER_LEVEL)
2073                                         continue;
2074                                 // Don't make a tree so high that it doesn't fit
2075                                 if(y > node_max.Y - 6)
2076                                         continue;
2077                                 v3s16 p(x,y,z);
2078                                 /*
2079                                         Trees grow only on mud and grass
2080                                 */
2081                                 {
2082                                         u32 i = vmanip.m_area.index(v3s16(p));
2083                                         MapNode *n = &vmanip.m_data[i];
2084                                         if(n->getContent() != c_dirt
2085                                                         && n->getContent() != c_dirt_with_grass)
2086                                                 continue;
2087                                 }
2088                                 p.Y++;
2089                                 // Make a tree
2090                                 make_tree(vmanip, p, false, ndef);
2091                         }
2092                 }
2093         }
2094
2095 #if 0
2096         /*
2097                 Make base ground level
2098         */
2099
2100         for(s16 x=node_min.X; x<=node_max.X; x++)
2101         for(s16 z=node_min.Z; z<=node_max.Z; z++)
2102         {
2103                 // Node position
2104                 v2s16 p2d(x,z);
2105                 {
2106                         // Use fast index incrementing
2107                         v3s16 em = vmanip.m_area.getExtent();
2108                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_min.Y, p2d.Y));
2109                         for(s16 y=node_min.Y; y<=node_max.Y; y++)
2110                         {
2111                                 // Only modify places that have no content
2112                                 if(vmanip.m_data[i].getContent() == CONTENT_IGNORE)
2113                                 {
2114                                         // First priority: make air and water.
2115                                         // This avoids caves inside water.
2116                                         if(all_is_ground_except_caves == false
2117                                                         && val_is_ground(noisebuf_ground.get(x,y,z),
2118                                                         v3s16(x,y,z), data->seed) == false)
2119                                         {
2120                                                 if(y <= WATER_LEVEL)
2121                                                         vmanip.m_data[i] = n_water_source;
2122                                                 else
2123                                                         vmanip.m_data[i] = n_air;
2124                                         }
2125                                         else if(noisebuf_cave.get(x,y,z) > CAVE_NOISE_THRESHOLD)
2126                                                 vmanip.m_data[i] = n_air;
2127                                         else
2128                                                 vmanip.m_data[i] = n_stone;
2129                                 }
2130
2131                                 vmanip->m_area.add_y(em, i, 1);
2132                         }
2133                 }
2134         }
2135
2136         /*
2137                 Add mud and sand and others underground (in place of stone)
2138         */
2139
2140         for(s16 x=node_min.X; x<=node_max.X; x++)
2141         for(s16 z=node_min.Z; z<=node_max.Z; z++)
2142         {
2143                 // Node position
2144                 v2s16 p2d(x,z);
2145                 {
2146                         // Use fast index incrementing
2147                         v3s16 em = vmanip.m_area.getExtent();
2148                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
2149                         for(s16 y=node_max.Y; y>=node_min.Y; y--)
2150                         {
2151                                 if(vmanip.m_data[i].getContent() == c_stone)
2152                                 {
2153                                         if(noisebuf_ground_crumbleness.get(x,y,z) > 1.3)
2154                                         {
2155                                                 if(noisebuf_ground_wetness.get(x,y,z) > 0.0)
2156                                                         vmanip.m_data[i] = n_dirt;
2157                                                 else
2158                                                         vmanip.m_data[i] = n_sand;
2159                                         }
2160                                         else if(noisebuf_ground_crumbleness.get(x,y,z) > 0.7)
2161                                         {
2162                                                 if(noisebuf_ground_wetness.get(x,y,z) < -0.6)
2163                                                         vmanip.m_data[i] = n_gravel;
2164                                         }
2165                                         else if(noisebuf_ground_crumbleness.get(x,y,z) <
2166                                                         -3.0 + MYMIN(0.1 * sqrt((float)MYMAX(0, -y)), 1.5))
2167                                         {
2168                                                 vmanip.m_data[i] = n_lava_source;
2169                                                 for(s16 x1=-1; x1<=1; x1++)
2170                                                 for(s16 y1=-1; y1<=1; y1++)
2171                                                 for(s16 z1=-1; z1<=1; z1++)
2172                                                         data->transforming_liquid.push_back(
2173                                                                         v3s16(p2d.X+x1, y+y1, p2d.Y+z1));
2174                                         }
2175                                 }
2176
2177                                 vmanip->m_area.add_y(em, i, -1);
2178                         }
2179                 }
2180         }
2181
2182         /*
2183                 Add dungeons
2184         */
2185
2186         //if(node_min.Y < approx_groundlevel)
2187         //if(myrand() % 3 == 0)
2188         //if(myrand() % 3 == 0 && node_min.Y < approx_groundlevel)
2189         //if(myrand() % 100 == 0 && node_min.Y < approx_groundlevel)
2190         //float dungeon_rarity = g_settings.getFloat("dungeon_rarity");
2191         float dungeon_rarity = 0.02;
2192         if(((noise3d(blockpos.X,blockpos.Y,blockpos.Z,data->seed)+1.0)/2.0)
2193                         < dungeon_rarity
2194                         && node_min.Y < approx_groundlevel)
2195         {
2196                 // Dungeon generator doesn't modify places which have this set
2197                 vmanip->clearFlag(VMANIP_FLAG_DUNGEON_INSIDE
2198                                 | VMANIP_FLAG_DUNGEON_PRESERVE);
2199
2200                 // Set all air and water to be untouchable to make dungeons open
2201                 // to caves and open air
2202                 for(s16 x=full_node_min.X; x<=full_node_max.X; x++)
2203                 for(s16 z=full_node_min.Z; z<=full_node_max.Z; z++)
2204                 {
2205                         // Node position
2206                         v2s16 p2d(x,z);
2207                         {
2208                                 // Use fast index incrementing
2209                                 v3s16 em = vmanip.m_area.getExtent();
2210                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, full_node_max.Y, p2d.Y));
2211                                 for(s16 y=full_node_max.Y; y>=full_node_min.Y; y--)
2212                                 {
2213                                         if(vmanip.m_data[i].getContent() == CONTENT_AIR)
2214                                                 vmanip.m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
2215                                         else if(vmanip.m_data[i].getContent() == c_water_source)
2216                                                 vmanip.m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
2217                                         vmanip->m_area.add_y(em, i, -1);
2218                                 }
2219                         }
2220                 }
2221
2222                 PseudoRandom random(blockseed+2);
2223
2224                 // Add it
2225                 make_dungeon1(vmanip, random, ndef);
2226
2227                 // Convert some cobble to mossy cobble
2228                 for(s16 x=full_node_min.X; x<=full_node_max.X; x++)
2229                 for(s16 z=full_node_min.Z; z<=full_node_max.Z; z++)
2230                 {
2231                         // Node position
2232                         v2s16 p2d(x,z);
2233                         {
2234                                 // Use fast index incrementing
2235                                 v3s16 em = vmanip.m_area.getExtent();
2236                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, full_node_max.Y, p2d.Y));
2237                                 for(s16 y=full_node_max.Y; y>=full_node_min.Y; y--)
2238                                 {
2239                                         // (noisebuf not used because it doesn't contain the
2240                                         //  full area)
2241                                         double wetness = noise3d_param(
2242                                                         get_ground_wetness_params(data->seed), x,y,z);
2243                                         double d = noise3d_perlin((float)x/2.5,
2244                                                         (float)y/2.5,(float)z/2.5,
2245                                                         blockseed, 2, 1.4);
2246                                         if(vmanip.m_data[i].getContent() == c_cobble)
2247                                         {
2248                                                 if(d < wetness/3.0)
2249                                                 {
2250                                                         vmanip.m_data[i].setContent(c_mossycobble);
2251                                                 }
2252                                         }
2253                                         /*else if(vmanip.m_flags[i] & VMANIP_FLAG_DUNGEON_INSIDE)
2254                                         {
2255                                                 if(wetness > 1.2)
2256                                                         vmanip.m_data[i].setContent(c_dirt);
2257                                         }*/
2258                                         vmanip->m_area.add_y(em, i, -1);
2259                                 }
2260                         }
2261                 }
2262         }
2263
2264         /*
2265                 Add NC
2266         */
2267         {
2268                 PseudoRandom ncrandom(blockseed+9324342);
2269                 if(ncrandom.range(0, 1000) == 0 && blockpos.Y <= -3)
2270                 {
2271                         make_nc(vmanip, ncrandom, ndef);
2272                 }
2273         }
2274
2275         /*
2276                 Add top and bottom side of water to transforming_liquid queue
2277         */
2278
2279         for(s16 x=node_min.X; x<=node_max.X; x++)
2280         for(s16 z=node_min.Z; z<=node_max.Z; z++)
2281         {
2282                 // Node position
2283                 v2s16 p2d(x,z);
2284                 {
2285                         bool water_found = false;
2286                         // Use fast index incrementing
2287                         v3s16 em = vmanip.m_area.getExtent();
2288                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
2289                         for(s16 y=node_max.Y; y>=node_min.Y; y--)
2290                         {
2291                                 if(water_found == false)
2292                                 {
2293                                         if(vmanip.m_data[i].getContent() == c_water_source)
2294                                         {
2295                                                 v3s16 p = v3s16(p2d.X, y, p2d.Y);
2296                                                 data->transforming_liquid.push_back(p);
2297                                                 water_found = true;
2298                                         }
2299                                 }
2300                                 else
2301                                 {
2302                                         // This can be done because water_found can only
2303                                         // turn to true and end up here after going through
2304                                         // a single block.
2305                                         if(vmanip.m_data[i+1].getContent() != c_water_source)
2306                                         {
2307                                                 v3s16 p = v3s16(p2d.X, y+1, p2d.Y);
2308                                                 data->transforming_liquid.push_back(p);
2309                                                 water_found = false;
2310                                         }
2311                                 }
2312
2313                                 vmanip->m_area.add_y(em, i, -1);
2314                         }
2315                 }
2316         }
2317
2318         /*
2319                 If close to ground level
2320         */
2321
2322         //if(abs(approx_ground_depth) < 30)
2323         if(minimum_ground_depth < 5 && maximum_ground_depth > -5)
2324         {
2325                 /*
2326                         Add grass and mud
2327                 */
2328
2329                 for(s16 x=node_min.X; x<=node_max.X; x++)
2330                 for(s16 z=node_min.Z; z<=node_max.Z; z++)
2331                 {
2332                         // Node position
2333                         v2s16 p2d(x,z);
2334                         {
2335                                 bool possibly_have_sand = get_have_sand(data->seed, p2d);
2336                                 bool have_sand = false;
2337                                 u32 current_depth = 0;
2338                                 bool air_detected = false;
2339                                 bool water_detected = false;
2340                                 bool have_clay = false;
2341
2342                                 // Use fast index incrementing
2343                                 s16 start_y = node_max.Y+2;
2344                                 v3s16 em = vmanip.m_area.getExtent();
2345                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, start_y, p2d.Y));
2346                                 for(s16 y=start_y; y>=node_min.Y-3; y--)
2347                                 {
2348                                         if(vmanip.m_data[i].getContent() == c_water_source)
2349                                                 water_detected = true;
2350                                         if(vmanip.m_data[i].getContent() == CONTENT_AIR)
2351                                                 air_detected = true;
2352
2353                                         if((vmanip.m_data[i].getContent() == c_stone
2354                                                         || vmanip.m_data[i].getContent() == c_dirt_with_grass
2355                                                         || vmanip.m_data[i].getContent() == c_dirt
2356                                                         || vmanip.m_data[i].getContent() == c_sand
2357                                                         || vmanip.m_data[i].getContent() == c_gravel
2358                                                         ) && (air_detected || water_detected))
2359                                         {
2360                                                 if(current_depth == 0 && y <= WATER_LEVEL+2
2361                                                                 && possibly_have_sand)
2362                                                         have_sand = true;
2363
2364                                                 if(current_depth < 4)
2365                                                 {
2366                                                         if(have_sand)
2367                                                         {
2368                                                                 // Determine whether to have clay in the sand here
2369                                                                 double claynoise = noise2d_perlin(
2370                                                                                 0.5+(float)p2d.X/500, 0.5+(float)p2d.Y/500,
2371                                                                                 data->seed+4321, 6, 0.95) + 0.5;
2372
2373                                                                 have_clay = (y <= WATER_LEVEL) && (y >= WATER_LEVEL-2) && (
2374                                                                         ((claynoise > 0) && (claynoise < 0.04) && (current_depth == 0)) ||
2375                                                                         ((claynoise > 0) && (claynoise < 0.12) && (current_depth == 1))
2376                                                                         );
2377                                                                 if (have_clay)
2378                                                                         vmanip.m_data[i] = MapNode(c_clay);
2379                                                                 else
2380                                                                         vmanip.m_data[i] = MapNode(c_sand);
2381                                                         }
2382                                                         #if 1
2383                                                         else if(current_depth==0 && !water_detected
2384                                                                         && y >= WATER_LEVEL && air_detected)
2385                                                                 vmanip.m_data[i] = MapNode(c_dirt_with_grass);
2386                                                         #endif
2387                                                         else
2388                                                                 vmanip.m_data[i] = MapNode(c_dirt);
2389                                                 }
2390                                                 else
2391                                                 {
2392                                                         if(vmanip.m_data[i].getContent() == c_dirt
2393                                                                 || vmanip.m_data[i].getContent() == c_dirt_with_grass)
2394                                                                 vmanip.m_data[i] = MapNode(c_stone);
2395                                                 }
2396
2397                                                 current_depth++;
2398
2399                                                 if(current_depth >= 8)
2400                                                         break;
2401                                         }
2402                                         else if(current_depth != 0)
2403                                                 break;
2404
2405                                         vmanip->m_area.add_y(em, i, -1);
2406                                 }
2407                         }
2408                 }
2409
2410                 /*
2411                         Calculate some stuff
2412                 */
2413
2414                 float surface_humidity = surface_humidity_2d(data->seed, p2d_center);
2415                 bool is_jungle = surface_humidity > 0.75;
2416                 // Amount of trees
2417                 u32 tree_count = gen_area_nodes * tree_amount_2d(data->seed, p2d_center);
2418                 if(is_jungle)
2419                         tree_count *= 5;
2420
2421                 /*
2422                         Add trees
2423                 */
2424                 PseudoRandom treerandom(blockseed);
2425                 // Put trees in random places on part of division
2426                 for(u32 i=0; i<tree_count; i++)
2427                 {
2428                         s16 x = treerandom.range(node_min.X, node_max.X);
2429                         s16 z = treerandom.range(node_min.Z, node_max.Z);
2430                         //s16 y = find_ground_level(vmanip, v2s16(x,z));
2431                         s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 4);
2432                         // Don't make a tree under water level
2433                         if(y < WATER_LEVEL)
2434                                 continue;
2435                         // Make sure tree fits (only trees whose starting point is
2436                         // at this block are added)
2437                         if(y < node_min.Y || y > node_max.Y)
2438                                 continue;
2439                         /*
2440                                 Find exact ground level
2441                         */
2442                         v3s16 p(x,y+6,z);
2443                         bool found = false;
2444                         for(; p.Y >= y-6; p.Y--)
2445                         {
2446                                 u32 i = vmanip->m_area.index(p);
2447                                 MapNode *n = &vmanip->m_data[i];
2448                                 if(n->getContent() != CONTENT_AIR && n->getContent() != c_water_source && n->getContent() != CONTENT_IGNORE)
2449                                 {
2450                                         found = true;
2451                                         break;
2452                                 }
2453                         }
2454                         // If not found, handle next one
2455                         if(found == false)
2456                                 continue;
2457
2458                         {
2459                                 u32 i = vmanip->m_area.index(p);
2460                                 MapNode *n = &vmanip->m_data[i];
2461
2462                                 if(n->getContent() != c_dirt && n->getContent() != c_dirt_with_grass && n->getContent() != c_sand)
2463                                                 continue;
2464
2465                                 // Papyrus grows only on mud and in water
2466                                 if(n->getContent() == c_dirt && y <= WATER_LEVEL)
2467                                 {
2468                                         p.Y++;
2469                                         make_papyrus(vmanip, p, ndef);
2470                                 }
2471                                 // Trees grow only on mud and grass, on land
2472                                 else if((n->getContent() == c_dirt || n->getContent() == c_dirt_with_grass) && y > WATER_LEVEL + 2)
2473                                 {
2474                                         p.Y++;
2475                                         //if(surface_humidity_2d(data->seed, v2s16(x, y)) < 0.5)
2476                                         if(is_jungle == false)
2477                                         {
2478                                                 bool is_apple_tree;
2479                                                 if(myrand_range(0,4) != 0)
2480                                                         is_apple_tree = false;
2481                                                 else
2482                                                         is_apple_tree = noise2d_perlin(
2483                                                                         0.5+(float)p.X/100, 0.5+(float)p.Z/100,
2484                                                                         data->seed+342902, 3, 0.45) > 0.2;
2485                                                 make_tree(vmanip, p, is_apple_tree, ndef);
2486                                         }
2487                                         else
2488                                                 make_jungletree(vmanip, p, ndef);
2489                                 }
2490                                 // Cactii grow only on sand, on land
2491                                 else if(n->getContent() == c_sand && y > WATER_LEVEL + 2)
2492                                 {
2493                                         p.Y++;
2494                                         make_cactus(vmanip, p, ndef);
2495                                 }
2496                         }
2497                 }
2498
2499                 /*
2500                         Add jungle grass
2501                 */
2502                 if(is_jungle)
2503                 {
2504                         PseudoRandom grassrandom(blockseed);
2505                         for(u32 i=0; i<surface_humidity*5*tree_count; i++)
2506                         {
2507                                 s16 x = grassrandom.range(node_min.X, node_max.X);
2508                                 s16 z = grassrandom.range(node_min.Z, node_max.Z);
2509                                 s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 4);
2510                                 if(y < WATER_LEVEL)
2511                                         continue;
2512                                 if(y < node_min.Y || y > node_max.Y)
2513                                         continue;
2514                                 /*
2515                                         Find exact ground level
2516                                 */
2517                                 v3s16 p(x,y+6,z);
2518                                 bool found = false;
2519                                 for(; p.Y >= y-6; p.Y--)
2520                                 {
2521                                         u32 i = vmanip->m_area.index(p);
2522                                         MapNode *n = &vmanip->m_data[i];
2523                                         if(data->nodedef->get(*n).is_ground_content)
2524                                         {
2525                                                 found = true;
2526                                                 break;
2527                                         }
2528                                 }
2529                                 // If not found, handle next one
2530                                 if(found == false)
2531                                         continue;
2532                                 p.Y++;
2533                                 if(vmanip.m_area.contains(p) == false)
2534                                         continue;
2535                                 if(vmanip.m_data[vmanip.m_area.index(p)].getContent() != CONTENT_AIR)
2536                                         continue;
2537                                 /*p.Y--;
2538                                 if(vmanip.m_area.contains(p))
2539                                         vmanip.m_data[vmanip.m_area.index(p)] = c_dirt;
2540                                 p.Y++;*/
2541                                 if(vmanip.m_area.contains(p))
2542                                         vmanip.m_data[vmanip.m_area.index(p)] = c_junglegrass;
2543                         }
2544                 }
2545
2546 #if 0
2547                 /*
2548                         Add some kind of random stones
2549                 */
2550
2551                 u32 random_stone_count = gen_area_nodes *
2552                                 randomstone_amount_2d(data->seed, p2d_center);
2553                 // Put in random places on part of division
2554                 for(u32 i=0; i<random_stone_count; i++)
2555                 {
2556                         s16 x = myrand_range(node_min.X, node_max.X);
2557                         s16 z = myrand_range(node_min.Z, node_max.Z);
2558                         s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 1);
2559                         // Don't add under water level
2560                         /*if(y < WATER_LEVEL)
2561                                 continue;*/
2562                         // Don't add if doesn't belong to this block
2563                         if(y < node_min.Y || y > node_max.Y)
2564                                 continue;
2565                         v3s16 p(x,y,z);
2566                         // Filter placement
2567                         /*{
2568                                 u32 i = vmanip->m_area.index(v3s16(p));
2569                                 MapNode *n = &vmanip->m_data[i];
2570                                 if(n->getContent() != c_dirt && n->getContent() != c_dirt_with_grass)
2571                                         continue;
2572                         }*/
2573                         // Will be placed one higher
2574                         p.Y++;
2575                         // Add it
2576                         make_randomstone(vmanip, p);
2577                 }
2578 #endif
2579
2580 #if 0
2581                 /*
2582                         Add larger stones
2583                 */
2584
2585                 u32 large_stone_count = gen_area_nodes *
2586                                 largestone_amount_2d(data->seed, p2d_center);
2587                 //u32 large_stone_count = 1;
2588                 // Put in random places on part of division
2589                 for(u32 i=0; i<large_stone_count; i++)
2590                 {
2591                         s16 x = myrand_range(node_min.X, node_max.X);
2592                         s16 z = myrand_range(node_min.Z, node_max.Z);
2593                         s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 1);
2594                         // Don't add under water level
2595                         /*if(y < WATER_LEVEL)
2596                                 continue;*/
2597                         // Don't add if doesn't belong to this block
2598                         if(y < node_min.Y || y > node_max.Y)
2599                                 continue;
2600                         v3s16 p(x,y,z);
2601                         // Filter placement
2602                         /*{
2603                                 u32 i = vmanip->m_area.index(v3s16(p));
2604                                 MapNode *n = &vmanip->m_data[i];
2605                                 if(n->getContent() != c_dirt && n->getContent() != c_dirt_with_grass)
2606                                         continue;
2607                         }*/
2608                         // Will be placed one lower
2609                         p.Y--;
2610                         // Add it
2611                         make_largestone(vmanip, p);
2612                 }
2613 #endif
2614         }
2615
2616         /*
2617                 Add minerals
2618         */
2619
2620         {
2621                 PseudoRandom mineralrandom(blockseed);
2622
2623                 /*
2624                         Add meseblocks
2625                 */
2626                 for(s16 i=0; i<approx_ground_depth/4; i++)
2627                 {
2628                         if(mineralrandom.next()%50 == 0)
2629                         {
2630                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
2631                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
2632                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
2633                                 for(u16 i=0; i<27; i++)
2634                                 {
2635                                         v3s16 p = v3s16(x,y,z) + g_27dirs[i];
2636                                         u32 vi = vmanip.m_area.index(p);
2637                                         if(vmanip.m_data[vi].getContent() == c_stone)
2638                                                 if(mineralrandom.next()%8 == 0)
2639                                                         vmanip.m_data[vi] = MapNode(c_mese);
2640                                 }
2641
2642                         }
2643                 }
2644                 /*
2645                         Add others
2646                 */
2647                 {
2648                         u16 a = mineralrandom.range(0,15);
2649                         a = a*a*a;
2650                         u16 amount = 20 * a/1000;
2651                         for(s16 i=0; i<amount; i++)
2652                         {
2653                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
2654                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
2655                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
2656
2657                                 u8 base_content = c_stone;
2658                                 MapNode new_content(CONTENT_IGNORE);
2659                                 u32 sparseness = 6;
2660
2661                                 if(noisebuf_ground_crumbleness.get(x,y+5,z) < -0.1)
2662                                 {
2663                                         new_content = MapNode(c_stone_with_coal);
2664                                 }
2665                                 else
2666                                 {
2667                                         if(noisebuf_ground_wetness.get(x,y+5,z) > 0.0)
2668                                                 new_content = MapNode(c_stone_with_iron);
2669                                         /*if(noisebuf_ground_wetness.get(x,y,z) > 0.0)
2670                                                 vmanip.m_data[i] = MapNode(c_dirt);
2671                                         else
2672                                                 vmanip.m_data[i] = MapNode(c_sand);*/
2673                                 }
2674                                 /*else if(noisebuf_ground_crumbleness.get(x,y,z) > 0.1)
2675                                 {
2676                                 }*/
2677
2678                                 if(new_content.getContent() != CONTENT_IGNORE)
2679                                 {
2680                                         for(u16 i=0; i<27; i++)
2681                                         {
2682                                                 v3s16 p = v3s16(x,y,z) + g_27dirs[i];
2683                                                 u32 vi = vmanip.m_area.index(p);
2684                                                 if(vmanip.m_data[vi].getContent() == base_content)
2685                                                 {
2686                                                         if(mineralrandom.next()%sparseness == 0)
2687                                                                 vmanip.m_data[vi] = new_content;
2688                                                 }
2689                                         }
2690                                 }
2691                         }
2692                 }
2693                 /*
2694                         Add coal
2695                 */
2696                 //for(s16 i=0; i < MYMAX(0, 50 - abs(node_min.Y+8 - (-30))); i++)
2697                 //for(s16 i=0; i<50; i++)
2698                 u16 coal_amount = 30;
2699                 u16 coal_rareness = 60 / coal_amount;
2700                 if(coal_rareness == 0)
2701                         coal_rareness = 1;
2702                 if(mineralrandom.next()%coal_rareness == 0)
2703                 {
2704                         u16 a = mineralrandom.next() % 16;
2705                         u16 amount = coal_amount * a*a*a / 1000;
2706                         for(s16 i=0; i<amount; i++)
2707                         {
2708                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
2709                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
2710                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
2711                                 for(u16 i=0; i<27; i++)
2712                                 {
2713                                         v3s16 p = v3s16(x,y,z) + g_27dirs[i];
2714                                         u32 vi = vmanip.m_area.index(p);
2715                                         if(vmanip.m_data[vi].getContent() == c_stone)
2716                                                 if(mineralrandom.next()%8 == 0)
2717                                                         vmanip.m_data[vi] = MapNode(c_stone_with_coal);
2718                                 }
2719                         }
2720                 }
2721                 /*
2722                         Add iron
2723                 */
2724                 u16 iron_amount = 8;
2725                 u16 iron_rareness = 60 / iron_amount;
2726                 if(iron_rareness == 0)
2727                         iron_rareness = 1;
2728                 if(mineralrandom.next()%iron_rareness == 0)
2729                 {
2730                         u16 a = mineralrandom.next() % 16;
2731                         u16 amount = iron_amount * a*a*a / 1000;
2732                         for(s16 i=0; i<amount; i++)
2733                         {
2734                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
2735                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
2736                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
2737                                 for(u16 i=0; i<27; i++)
2738                                 {
2739                                         v3s16 p = v3s16(x,y,z) + g_27dirs[i];
2740                                         u32 vi = vmanip.m_area.index(p);
2741                                         if(vmanip.m_data[vi].getContent() == c_stone)
2742                                                 if(mineralrandom.next()%8 == 0)
2743                                                         vmanip.m_data[vi] = MapNode(c_stone_with_iron);
2744                                 }
2745                         }
2746                 }
2747         }
2748 #endif
2749
2750         /*
2751                 Calculate lighting
2752         */
2753         {
2754         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update",
2755                         SPT_AVG);
2756         //VoxelArea a(node_min, node_max);
2757         VoxelArea a(node_min-v3s16(1,0,1)*MAP_BLOCKSIZE,
2758                         node_max+v3s16(1,0,1)*MAP_BLOCKSIZE);
2759         /*VoxelArea a(node_min-v3s16(1,0,1)*MAP_BLOCKSIZE/2,
2760                         node_max+v3s16(1,0,1)*MAP_BLOCKSIZE/2);*/
2761         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
2762         for(int i=0; i<2; i++)
2763         {
2764                 enum LightBank bank = banks[i];
2765
2766                 core::map<v3s16, bool> light_sources;
2767                 core::map<v3s16, u8> unlight_from;
2768
2769                 voxalgo::clearLightAndCollectSources(vmanip, a, bank, ndef,
2770                                 light_sources, unlight_from);
2771
2772                 bool inexistent_top_provides_sunlight = !block_is_underground;
2773                 voxalgo::SunlightPropagateResult res = voxalgo::propagateSunlight(
2774                                 vmanip, a, inexistent_top_provides_sunlight,
2775                                 light_sources, ndef);
2776                 // TODO: Do stuff according to bottom_sunlight_valid
2777
2778                 vmanip.unspreadLight(bank, unlight_from, light_sources, ndef);
2779
2780                 vmanip.spreadLight(bank, light_sources, ndef);
2781         }
2782         }
2783 }
2784
2785 BlockMakeData::BlockMakeData():
2786         no_op(false),
2787         vmanip(NULL),
2788         seed(0),
2789         nodedef(NULL)
2790 {}
2791
2792 BlockMakeData::~BlockMakeData()
2793 {
2794         delete vmanip;
2795 }
2796
2797 }; // namespace mapgen
2798
2799