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 "content_mapnode.h"
  23 #include "noise.h"
  24 #include "mapblock.h"
  25 #include "map.h"
  26 #include "serverobject.h"
  27 #include "mineral.h"
  28
  29 namespace mapgen
  30 {
  31
  32 /*
  33         Some helper functions for the map generator
  34 */
  35
  36 #if 0
  37 static s16 find_ground_level(VoxelManipulator &vmanip, v2s16 p2d)
  38 {
  39         v3s16 em = vmanip.m_area.getExtent();
  40         s16 y_nodes_max = vmanip.m_area.MaxEdge.Y;
  41         s16 y_nodes_min = vmanip.m_area.MinEdge.Y;
  42         u32 i = vmanip.m_area.index(v3s16(p2d.X, y_nodes_max, p2d.Y));
  43         s16 y;
  44         for(y=y_nodes_max; y>=y_nodes_min; y--)
  45         {
  46                 MapNode &n = vmanip.m_data[i];
  47                 if(content_walkable(n.d))
  48                         break;
  49
  50                 vmanip.m_area.add_y(em, i, -1);
  51         }
  52         if(y >= y_nodes_min)
  53                 return y;
  54         else
  55                 return y_nodes_min;
  56 }
  57
  58 static s16 find_ground_level_clever(VoxelManipulator &vmanip, v2s16 p2d)
  59 {
  60         v3s16 em = vmanip.m_area.getExtent();
  61         s16 y_nodes_max = vmanip.m_area.MaxEdge.Y;
  62         s16 y_nodes_min = vmanip.m_area.MinEdge.Y;
  63         u32 i = vmanip.m_area.index(v3s16(p2d.X, y_nodes_max, p2d.Y));
  64         s16 y;
  65         for(y=y_nodes_max; y>=y_nodes_min; y--)
  66         {
  67                 MapNode &n = vmanip.m_data[i];
  68                 if(content_walkable(n.d)
  69                                 && n.d != CONTENT_TREE
  70                                 && n.d != CONTENT_LEAVES)
  71                         break;
  72
  73                 vmanip.m_area.add_y(em, i, -1);
  74         }
  75         if(y >= y_nodes_min)
  76                 return y;
  77         else
  78                 return y_nodes_min;
  79 }
  80 #endif
  81
  82 static void make_tree(VoxelManipulator &vmanip, v3s16 p0)
  83 {
  84         MapNode treenode(CONTENT_TREE);
  85         MapNode leavesnode(CONTENT_LEAVES);
  86
  87         s16 trunk_h = myrand_range(3, 6);
  88         v3s16 p1 = p0;
  89         for(s16 ii=0; ii<trunk_h; ii++)
  90         {
  91                 if(vmanip.m_area.contains(p1))
  92                         vmanip.m_data[vmanip.m_area.index(p1)] = treenode;
  93                 p1.Y++;
  94         }
  95
  96         // p1 is now the last piece of the trunk
  97         p1.Y -= 1;
  98
  99         VoxelArea leaves_a(v3s16(-2,-2,-2), v3s16(2,2,2));
 100         //SharedPtr<u8> leaves_d(new u8[leaves_a.getVolume()]);
 101         Buffer<u8> leaves_d(leaves_a.getVolume());
 102         for(s32 i=0; i<leaves_a.getVolume(); i++)
 103                 leaves_d[i] = 0;
 104
 105         // Force leaves at near the end of the trunk
 106         {
 107                 s16 d = 1;
 108                 for(s16 z=-d; z<=d; z++)
 109                 for(s16 y=-d; y<=d; y++)
 110                 for(s16 x=-d; x<=d; x++)
 111                 {
 112                         leaves_d[leaves_a.index(v3s16(x,y,z))] = 1;
 113                 }
 114         }
 115
 116         // Add leaves randomly
 117         for(u32 iii=0; iii<7; iii++)
 118         {
 119                 s16 d = 1;
 120
 121                 v3s16 p(
 122                         myrand_range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X-d),
 123                         myrand_range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y-d),
 124                         myrand_range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z-d)
 125                 );
 126
 127                 for(s16 z=0; z<=d; z++)
 128                 for(s16 y=0; y<=d; y++)
 129                 for(s16 x=0; x<=d; x++)
 130                 {
 131                         leaves_d[leaves_a.index(p+v3s16(x,y,z))] = 1;
 132                 }
 133         }
 134
 135         // Blit leaves to vmanip
 136         for(s16 z=leaves_a.MinEdge.Z; z<=leaves_a.MaxEdge.Z; z++)
 137         for(s16 y=leaves_a.MinEdge.Y; y<=leaves_a.MaxEdge.Y; y++)
 138         for(s16 x=leaves_a.MinEdge.X; x<=leaves_a.MaxEdge.X; x++)
 139         {
 140                 v3s16 p(x,y,z);
 141                 p += p1;
 142                 if(vmanip.m_area.contains(p) == false)
 143                         continue;
 144                 u32 vi = vmanip.m_area.index(p);
 145                 if(vmanip.m_data[vi].d != CONTENT_AIR
 146                                 && vmanip.m_data[vi].d != CONTENT_IGNORE)
 147                         continue;
 148                 u32 i = leaves_a.index(x,y,z);
 149                 if(leaves_d[i] == 1)
 150                         vmanip.m_data[vi] = leavesnode;
 151         }
 152 }
 153
 154 void make_papyrus(VoxelManipulator &vmanip, v3s16 p0)
 155 {
 156         MapNode papyrusnode(CONTENT_PAPYRUS);
 157
 158         s16 trunk_h = myrand_range(2, 3);
 159         v3s16 p1 = p0;
 160         for(s16 ii=0; ii<trunk_h; ii++)
 161         {
 162                 if(vmanip.m_area.contains(p1))
 163                         vmanip.m_data[vmanip.m_area.index(p1)] = papyrusnode;
 164                 p1.Y++;
 165         }
 166 }
 167
 168 void make_cactus(VoxelManipulator &vmanip, v3s16 p0)
 169 {
 170         MapNode cactusnode(CONTENT_CACTUS);
 171
 172         s16 trunk_h = 3;
 173         v3s16 p1 = p0;
 174         for(s16 ii=0; ii<trunk_h; ii++)
 175         {
 176                 if(vmanip.m_area.contains(p1))
 177                         vmanip.m_data[vmanip.m_area.index(p1)] = cactusnode;
 178                 p1.Y++;
 179         }
 180 }
 181
 182 #if 0
 183 static void make_randomstone(VoxelManipulator &vmanip, v3s16 p0)
 184 {
 185         MapNode stonenode(CONTENT_STONE);
 186
 187         s16 size = myrand_range(3, 6);
 188
 189         VoxelArea stone_a(v3s16(-2,0,-2), v3s16(2,size,2));
 190         Buffer<u8> stone_d(stone_a.getVolume());
 191         for(s32 i=0; i<stone_a.getVolume(); i++)
 192                 stone_d[i] = 0;
 193
 194         // Force stone at bottom to make it usually touch the ground
 195         {
 196                 for(s16 z=0; z<=0; z++)
 197                 for(s16 y=0; y<=0; y++)
 198                 for(s16 x=0; x<=0; x++)
 199                 {
 200                         stone_d[stone_a.index(v3s16(x,y,z))] = 1;
 201                 }
 202         }
 203
 204         // Generate from perlin noise
 205         for(s16 z=stone_a.MinEdge.Z; z<=stone_a.MaxEdge.Z; z++)
 206         for(s16 y=stone_a.MinEdge.Y; y<=stone_a.MaxEdge.Y; y++)
 207         for(s16 x=stone_a.MinEdge.X; x<=stone_a.MaxEdge.X; x++)
 208         {
 209                 double d = noise3d_perlin((float)x/3.,(float)z/3.,(float)y/3.,
 210                                 p0.Z*4243+p0.Y*34+p0.X, 2, 0.5);
 211                 if(z == stone_a.MinEdge.Z || z == stone_a.MaxEdge.Z)
 212                         d -= 0.3;
 213                 if(/*y == stone_a.MinEdge.Y ||*/ y == stone_a.MaxEdge.Y)
 214                         d -= 0.3;
 215                 if(x == stone_a.MinEdge.X || x == stone_a.MaxEdge.X)
 216                         d -= 0.3;
 217                 if(d > 0.0)
 218                 {
 219                         u32 vi = stone_a.index(v3s16(x,y,z));
 220                         stone_d[vi] = 1;
 221                 }
 222         }
 223
 224         /*// Add stone randomly
 225         for(u32 iii=0; iii<7; iii++)
 226         {
 227                 s16 d = 1;
 228
 229                 v3s16 p(
 230                         myrand_range(stone_a.MinEdge.X, stone_a.MaxEdge.X-d),
 231                         myrand_range(stone_a.MinEdge.Y, stone_a.MaxEdge.Y-d),
 232                         myrand_range(stone_a.MinEdge.Z, stone_a.MaxEdge.Z-d)
 233                 );
 234
 235                 for(s16 z=0; z<=d; z++)
 236                 for(s16 y=0; y<=d; y++)
 237                 for(s16 x=0; x<=d; x++)
 238                 {
 239                         stone_d[stone_a.index(p+v3s16(x,y,z))] = 1;
 240                 }
 241         }*/
 242
 243         // Blit stone to vmanip
 244         for(s16 z=stone_a.MinEdge.Z; z<=stone_a.MaxEdge.Z; z++)
 245         for(s16 y=stone_a.MinEdge.Y; y<=stone_a.MaxEdge.Y; y++)
 246         for(s16 x=stone_a.MinEdge.X; x<=stone_a.MaxEdge.X; x++)
 247         {
 248                 v3s16 p(x,y,z);
 249                 p += p0;
 250                 if(vmanip.m_area.contains(p) == false)
 251                         continue;
 252                 u32 vi = vmanip.m_area.index(p);
 253                 if(vmanip.m_data[vi].d != CONTENT_AIR
 254                                 && vmanip.m_data[vi].d != CONTENT_IGNORE)
 255                         continue;
 256                 u32 i = stone_a.index(x,y,z);
 257                 if(stone_d[i] == 1)
 258                         vmanip.m_data[vi] = stonenode;
 259         }
 260 }
 261 #endif
 262
 263 #if 0
 264 static void make_largestone(VoxelManipulator &vmanip, v3s16 p0)
 265 {
 266         MapNode stonenode(CONTENT_STONE);
 267
 268         s16 size = myrand_range(8, 16);
 269
 270         VoxelArea stone_a(v3s16(-size/2,0,-size/2), v3s16(size/2,size,size/2));
 271         Buffer<u8> stone_d(stone_a.getVolume());
 272         for(s32 i=0; i<stone_a.getVolume(); i++)
 273                 stone_d[i] = 0;
 274
 275         // Force stone at bottom to make it usually touch the ground
 276         {
 277                 for(s16 z=0; z<=0; z++)
 278                 for(s16 y=0; y<=0; y++)
 279                 for(s16 x=0; x<=0; x++)
 280                 {
 281                         stone_d[stone_a.index(v3s16(x,y,z))] = 1;
 282                 }
 283         }
 284
 285         // Generate from perlin noise
 286         for(s16 z=stone_a.MinEdge.Z; z<=stone_a.MaxEdge.Z; z++)
 287         for(s16 y=stone_a.MinEdge.Y; y<=stone_a.MaxEdge.Y; y++)
 288         for(s16 x=stone_a.MinEdge.X; x<=stone_a.MaxEdge.X; x++)
 289         {
 290                 double d = 1.0;
 291                 d += noise3d_perlin((float)x/10.,(float)z/10.,(float)y/10.,
 292                                 p0.Z*5123+p0.Y*2439+p0.X, 2, 0.5);
 293                 double mid_z = (stone_a.MaxEdge.Z+stone_a.MinEdge.Z)/2;
 294                 double mid_x = (stone_a.MaxEdge.X+stone_a.MinEdge.X)/2;
 295                 double mid_y = (stone_a.MaxEdge.Y+stone_a.MinEdge.Y)/2;
 296                 double dz = (double)z-mid_z;
 297                 double dx = (double)x-mid_x;
 298                 double dy = MYMAX(0, (double)y-mid_y);
 299                 double r = sqrt(dz*dz+dx*dx+dy*dy);
 300                 d /= (2*r/size)*2 + 0.01;
 301                 if(d > 1.0)
 302                 {
 303                         u32 vi = stone_a.index(v3s16(x,y,z));
 304                         stone_d[vi] = 1;
 305                 }
 306         }
 307
 308         /*// Add stone randomly
 309         for(u32 iii=0; iii<7; iii++)
 310         {
 311                 s16 d = 1;
 312
 313                 v3s16 p(
 314                         myrand_range(stone_a.MinEdge.X, stone_a.MaxEdge.X-d),
 315                         myrand_range(stone_a.MinEdge.Y, stone_a.MaxEdge.Y-d),
 316                         myrand_range(stone_a.MinEdge.Z, stone_a.MaxEdge.Z-d)
 317                 );
 318
 319                 for(s16 z=0; z<=d; z++)
 320                 for(s16 y=0; y<=d; y++)
 321                 for(s16 x=0; x<=d; x++)
 322                 {
 323                         stone_d[stone_a.index(p+v3s16(x,y,z))] = 1;
 324                 }
 325         }*/
 326
 327         // Blit stone to vmanip
 328         for(s16 z=stone_a.MinEdge.Z; z<=stone_a.MaxEdge.Z; z++)
 329         for(s16 y=stone_a.MinEdge.Y; y<=stone_a.MaxEdge.Y; y++)
 330         for(s16 x=stone_a.MinEdge.X; x<=stone_a.MaxEdge.X; x++)
 331         {
 332                 v3s16 p(x,y,z);
 333                 p += p0;
 334                 if(vmanip.m_area.contains(p) == false)
 335                         continue;
 336                 u32 vi = vmanip.m_area.index(p);
 337                 /*if(vmanip.m_data[vi].d != CONTENT_AIR
 338                                 && vmanip.m_data[vi].d != CONTENT_IGNORE)
 339                         continue;*/
 340                 u32 i = stone_a.index(x,y,z);
 341                 if(stone_d[i] == 1)
 342                         vmanip.m_data[vi] = stonenode;
 343         }
 344 }
 345 #endif
 346
 347 /*
 348         Dungeon making routines
 349 */
 350
 351 #define VMANIP_FLAG_DUNGEON_INSIDE VOXELFLAG_CHECKED1
 352 #define VMANIP_FLAG_DUNGEON_PRESERVE VOXELFLAG_CHECKED2
 353 #define VMANIP_FLAG_DUNGEON_UNTOUCHABLE (\
 354                 VMANIP_FLAG_DUNGEON_INSIDE|VMANIP_FLAG_DUNGEON_PRESERVE)
 355
 356 static void make_room1(VoxelManipulator &vmanip, v3s16 roomsize, v3s16 roomplace)
 357 {
 358         // Make +-X walls
 359         for(s16 z=0; z<roomsize.Z; z++)
 360         for(s16 y=0; y<roomsize.Y; y++)
 361         {
 362                 {
 363                         v3s16 p = roomplace + v3s16(0,y,z);
 364                         if(vmanip.m_area.contains(p) == false)
 365                                 continue;
 366                         u32 vi = vmanip.m_area.index(p);
 367                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 368                                 continue;
 369                         vmanip.m_data[vi] = MapNode(CONTENT_COBBLE);
 370                 }
 371                 {
 372                         v3s16 p = roomplace + v3s16(roomsize.X-1,y,z);
 373                         if(vmanip.m_area.contains(p) == false)
 374                                 continue;
 375                         u32 vi = vmanip.m_area.index(p);
 376                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 377                                 continue;
 378                         vmanip.m_data[vi] = MapNode(CONTENT_COBBLE);
 379                 }
 380         }
 381
 382         // Make +-Z walls
 383         for(s16 x=0; x<roomsize.X; x++)
 384         for(s16 y=0; y<roomsize.Y; y++)
 385         {
 386                 {
 387                         v3s16 p = roomplace + v3s16(x,y,0);
 388                         if(vmanip.m_area.contains(p) == false)
 389                                 continue;
 390                         u32 vi = vmanip.m_area.index(p);
 391                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 392                                 continue;
 393                         vmanip.m_data[vi] = MapNode(CONTENT_COBBLE);
 394                 }
 395                 {
 396                         v3s16 p = roomplace + v3s16(x,y,roomsize.Z-1);
 397                         if(vmanip.m_area.contains(p) == false)
 398                                 continue;
 399                         u32 vi = vmanip.m_area.index(p);
 400                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 401                                 continue;
 402                         vmanip.m_data[vi] = MapNode(CONTENT_COBBLE);
 403                 }
 404         }
 405
 406         // Make +-Y walls (floor and ceiling)
 407         for(s16 z=0; z<roomsize.Z; z++)
 408         for(s16 x=0; x<roomsize.X; x++)
 409         {
 410                 {
 411                         v3s16 p = roomplace + v3s16(x,0,z);
 412                         if(vmanip.m_area.contains(p) == false)
 413                                 continue;
 414                         u32 vi = vmanip.m_area.index(p);
 415                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 416                                 continue;
 417                         vmanip.m_data[vi] = MapNode(CONTENT_COBBLE);
 418                 }
 419                 {
 420                         v3s16 p = roomplace + v3s16(x,roomsize.Y-1,z);
 421                         if(vmanip.m_area.contains(p) == false)
 422                                 continue;
 423                         u32 vi = vmanip.m_area.index(p);
 424                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_UNTOUCHABLE)
 425                                 continue;
 426                         vmanip.m_data[vi] = MapNode(CONTENT_COBBLE);
 427                 }
 428         }
 429
 430         // Fill with air
 431         for(s16 z=1; z<roomsize.Z-1; z++)
 432         for(s16 y=1; y<roomsize.Y-1; y++)
 433         for(s16 x=1; x<roomsize.X-1; x++)
 434         {
 435                 v3s16 p = roomplace + v3s16(x,y,z);
 436                 if(vmanip.m_area.contains(p) == false)
 437                         continue;
 438                 u32 vi = vmanip.m_area.index(p);
 439                 vmanip.m_flags[vi] |= VMANIP_FLAG_DUNGEON_UNTOUCHABLE;
 440                 vmanip.m_data[vi] = MapNode(CONTENT_AIR);
 441         }
 442 }
 443
 444 static void make_fill(VoxelManipulator &vmanip, v3s16 place, v3s16 size,
 445                 u8 avoid_flags, MapNode n, u8 or_flags)
 446 {
 447         for(s16 z=0; z<size.Z; z++)
 448         for(s16 y=0; y<size.Y; y++)
 449         for(s16 x=0; x<size.X; x++)
 450         {
 451                 v3s16 p = place + v3s16(x,y,z);
 452                 if(vmanip.m_area.contains(p) == false)
 453                         continue;
 454                 u32 vi = vmanip.m_area.index(p);
 455                 if(vmanip.m_flags[vi] & avoid_flags)
 456                         continue;
 457                 vmanip.m_flags[vi] |= or_flags;
 458                 vmanip.m_data[vi] = n;
 459         }
 460 }
 461
 462 static void make_hole1(VoxelManipulator &vmanip, v3s16 place)
 463 {
 464         make_fill(vmanip, place, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 465                         VMANIP_FLAG_DUNGEON_INSIDE);
 466 }
 467
 468 static void make_door1(VoxelManipulator &vmanip, v3s16 doorplace, v3s16 doordir)
 469 {
 470         make_hole1(vmanip, doorplace);
 471         // Place torch (for testing)
 472         //vmanip.m_data[vmanip.m_area.index(doorplace)] = MapNode(CONTENT_TORCH);
 473 }
 474
 475 static v3s16 rand_ortho_dir(PseudoRandom &random)
 476 {
 477         if(random.next()%2==0)
 478                 return random.next()%2 ? v3s16(-1,0,0) : v3s16(1,0,0);
 479         else
 480                 return random.next()%2 ? v3s16(0,0,-1) : v3s16(0,0,1);
 481 }
 482
 483 static v3s16 turn_xz(v3s16 olddir, int t)
 484 {
 485         v3s16 dir;
 486         if(t == 0)
 487         {
 488                 // Turn right
 489                 dir.X = olddir.Z;
 490                 dir.Z = -olddir.X;
 491                 dir.Y = olddir.Y;
 492         }
 493         else
 494         {
 495                 // Turn left
 496                 dir.X = -olddir.Z;
 497                 dir.Z = olddir.X;
 498                 dir.Y = olddir.Y;
 499         }
 500         return dir;
 501 }
 502
 503 static v3s16 random_turn(PseudoRandom &random, v3s16 olddir)
 504 {
 505         int turn = random.range(0,2);
 506         v3s16 dir;
 507         if(turn == 0)
 508         {
 509                 // Go straight
 510                 dir = olddir;
 511         }
 512         else if(turn == 1)
 513                 // Turn right
 514                 dir = turn_xz(olddir, 0);
 515         else
 516                 // Turn left
 517                 dir = turn_xz(olddir, 1);
 518         return dir;
 519 }
 520
 521 static void make_corridor(VoxelManipulator &vmanip, v3s16 doorplace,
 522                 v3s16 doordir, v3s16 &result_place, v3s16 &result_dir,
 523                 PseudoRandom &random)
 524 {
 525         make_hole1(vmanip, doorplace);
 526         v3s16 p0 = doorplace;
 527         v3s16 dir = doordir;
 528         u32 length;
 529         if(random.next()%2)
 530                 length = random.range(1,13);
 531         else
 532                 length = random.range(1,6);
 533         length = random.range(1,13);
 534         u32 partlength = random.range(1,length);
 535         u32 partcount = 0;
 536         s16 make_stairs = 0;
 537         if(random.next()%2 == 0 && partlength >= 3)
 538                 make_stairs = random.next()%2 ? 1 : -1;
 539         for(u32 i=0; i<length; i++)
 540         {
 541                 v3s16 p = p0 + dir;
 542                 if(partcount != 0)
 543                         p.Y += make_stairs;
 544
 545                 /*// If already empty
 546                 if(vmanip.getNodeNoExNoEmerge(p).d
 547                                 == CONTENT_AIR
 548                 && vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).d
 549                                 == CONTENT_AIR)
 550                 {
 551                 }*/
 552
 553                 if(vmanip.m_area.contains(p) == true
 554                                 && vmanip.m_area.contains(p+v3s16(0,1,0)) == true)
 555                 {
 556                         if(make_stairs)
 557                         {
 558                                 make_fill(vmanip, p+v3s16(-1,-1,-1), v3s16(3,5,3),
 559                                                 VMANIP_FLAG_DUNGEON_UNTOUCHABLE, MapNode(CONTENT_COBBLE), 0);
 560                                 make_fill(vmanip, p, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 561                                                 VMANIP_FLAG_DUNGEON_INSIDE);
 562                                 make_fill(vmanip, p-dir, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 563                                                 VMANIP_FLAG_DUNGEON_INSIDE);
 564                         }
 565                         else
 566                         {
 567                                 make_fill(vmanip, p+v3s16(-1,-1,-1), v3s16(3,4,3),
 568                                                 VMANIP_FLAG_DUNGEON_UNTOUCHABLE, MapNode(CONTENT_COBBLE), 0);
 569                                 make_hole1(vmanip, p);
 570                                 /*make_fill(vmanip, p, v3s16(1,2,1), 0, MapNode(CONTENT_AIR),
 571                                                 VMANIP_FLAG_DUNGEON_INSIDE);*/
 572                         }
 573
 574                         p0 = p;
 575                 }
 576                 else
 577                 {
 578                         // Can't go here, turn away
 579                         dir = turn_xz(dir, random.range(0,1));
 580                         make_stairs = -make_stairs;
 581                         partcount = 0;
 582                         partlength = random.range(1,length);
 583                         continue;
 584                 }
 585
 586                 partcount++;
 587                 if(partcount >= partlength)
 588                 {
 589                         partcount = 0;
 590
 591                         dir = random_turn(random, dir);
 592
 593                         partlength = random.range(1,length);
 594
 595                         make_stairs = 0;
 596                         if(random.next()%2 == 0 && partlength >= 3)
 597                                 make_stairs = random.next()%2 ? 1 : -1;
 598                 }
 599         }
 600         result_place = p0;
 601         result_dir = dir;
 602 }
 603
 604 class RoomWalker
 605 {
 606 public:
 607
 608         RoomWalker(VoxelManipulator &vmanip_, v3s16 pos, PseudoRandom &random):
 609                         vmanip(vmanip_),
 610                         m_pos(pos),
 611                         m_random(random)
 612         {
 613                 randomizeDir();
 614         }
 615
 616         void randomizeDir()
 617         {
 618                 m_dir = rand_ortho_dir(m_random);
 619         }
 620
 621         void setPos(v3s16 pos)
 622         {
 623                 m_pos = pos;
 624         }
 625
 626         void setDir(v3s16 dir)
 627         {
 628                 m_dir = dir;
 629         }
 630
 631         bool findPlaceForDoor(v3s16 &result_place, v3s16 &result_dir)
 632         {
 633                 for(u32 i=0; i<100; i++)
 634                 {
 635                         v3s16 p = m_pos + m_dir;
 636                         v3s16 p1 = p + v3s16(0,1,0);
 637                         if(vmanip.m_area.contains(p) == false
 638                                         || vmanip.m_area.contains(p1) == false
 639                                         || i % 4 == 0)
 640                         {
 641                                 randomizeDir();
 642                                 continue;
 643                         }
 644                         if(vmanip.getNodeNoExNoEmerge(p).d
 645                                         == CONTENT_COBBLE
 646                         && vmanip.getNodeNoExNoEmerge(p1).d
 647                                         == CONTENT_COBBLE)
 648                         {
 649                                 // Found wall, this is a good place!
 650                                 result_place = p;
 651                                 result_dir = m_dir;
 652                                 // Randomize next direction
 653                                 randomizeDir();
 654                                 return true;
 655                         }
 656                         /*
 657                                 Determine where to move next
 658                         */
 659                         // Jump one up if the actual space is there
 660                         if(vmanip.getNodeNoExNoEmerge(p+v3s16(0,0,0)).d
 661                                         == CONTENT_COBBLE
 662                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).d
 663                                         == CONTENT_AIR
 664                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,2,0)).d
 665                                         == CONTENT_AIR)
 666                                 p += v3s16(0,1,0);
 667                         // Jump one down if the actual space is there
 668                         if(vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).d
 669                                         == CONTENT_COBBLE
 670                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,0,0)).d
 671                                         == CONTENT_AIR
 672                         && vmanip.getNodeNoExNoEmerge(p+v3s16(0,-1,0)).d
 673                                         == CONTENT_AIR)
 674                                 p += v3s16(0,-1,0);
 675                         // Check if walking is now possible
 676                         if(vmanip.getNodeNoExNoEmerge(p).d
 677                                         != CONTENT_AIR
 678                         || vmanip.getNodeNoExNoEmerge(p+v3s16(0,1,0)).d
 679                                         != CONTENT_AIR)
 680                         {
 681                                 // Cannot continue walking here
 682                                 randomizeDir();
 683                                 continue;
 684                         }
 685                         // Move there
 686                         m_pos = p;
 687                 }
 688                 return false;
 689         }
 690
 691         bool findPlaceForRoomDoor(v3s16 roomsize, v3s16 &result_doorplace,
 692                         v3s16 &result_doordir, v3s16 &result_roomplace)
 693         {
 694                 for(s16 trycount=0; trycount<30; trycount++)
 695                 {
 696                         v3s16 doorplace;
 697                         v3s16 doordir;
 698                         bool r = findPlaceForDoor(doorplace, doordir);
 699                         if(r == false)
 700                                 continue;
 701                         v3s16 roomplace;
 702                         // X east, Z north, Y up
 703                         if(doordir == v3s16(1,0,0)) // X+
 704                                 roomplace = doorplace + v3s16(0,-1,-roomsize.Z/2+m_random.range(-roomsize.Z/2+1,roomsize.Z/2-1));
 705                         if(doordir == v3s16(-1,0,0)) // X-
 706                                 roomplace = doorplace + v3s16(-roomsize.X+1,-1,-roomsize.Z/2+m_random.range(-roomsize.Z/2+1,roomsize.Z/2-1));
 707                         if(doordir == v3s16(0,0,1)) // Z+
 708                                 roomplace = doorplace + v3s16(-roomsize.X/2+m_random.range(-roomsize.X/2+1,roomsize.X/2-1),-1,0);
 709                         if(doordir == v3s16(0,0,-1)) // Z-
 710                                 roomplace = doorplace + v3s16(-roomsize.X/2+m_random.range(-roomsize.X/2+1,roomsize.X/2-1),-1,-roomsize.Z+1);
 711
 712                         // Check fit
 713                         bool fits = true;
 714                         for(s16 z=1; z<roomsize.Z-1; z++)
 715                         for(s16 y=1; y<roomsize.Y-1; y++)
 716                         for(s16 x=1; x<roomsize.X-1; x++)
 717                         {
 718                                 v3s16 p = roomplace + v3s16(x,y,z);
 719                                 if(vmanip.m_area.contains(p) == false)
 720                                 {
 721                                         fits = false;
 722                                         break;
 723                                 }
 724                                 if(vmanip.m_flags[vmanip.m_area.index(p)]
 725                                                 & VMANIP_FLAG_DUNGEON_INSIDE)
 726                                 {
 727                                         fits = false;
 728                                         break;
 729                                 }
 730                         }
 731                         if(fits == false)
 732                         {
 733                                 // Find new place
 734                                 continue;
 735                         }
 736                         result_doorplace = doorplace;
 737                         result_doordir = doordir;
 738                         result_roomplace = roomplace;
 739                         return true;
 740                 }
 741                 return false;
 742         }
 743
 744 private:
 745         VoxelManipulator &vmanip;
 746         v3s16 m_pos;
 747         v3s16 m_dir;
 748         PseudoRandom &m_random;
 749 };
 750
 751 static void make_dungeon1(VoxelManipulator &vmanip, PseudoRandom &random)
 752 {
 753         v3s16 areasize = vmanip.m_area.getExtent();
 754         v3s16 roomsize;
 755         v3s16 roomplace;
 756
 757         /*
 758                 Find place for first room
 759         */
 760         bool fits = false;
 761         for(u32 i=0; i<100; i++)
 762         {
 763                 roomsize = v3s16(random.range(4,8),random.range(4,6),random.range(4,8));
 764                 roomplace = vmanip.m_area.MinEdge + v3s16(
 765                                 random.range(0,areasize.X-roomsize.X-1),
 766                                 random.range(0,areasize.Y-roomsize.Y-1),
 767                                 random.range(0,areasize.Z-roomsize.Z-1));
 768                 /*
 769                         Check that we're not putting the room to an unknown place,
 770                         otherwise it might end up floating in the air
 771                 */
 772                 fits = true;
 773                 for(s16 z=1; z<roomsize.Z-1; z++)
 774                 for(s16 y=1; y<roomsize.Y-1; y++)
 775                 for(s16 x=1; x<roomsize.X-1; x++)
 776                 {
 777                         v3s16 p = roomplace + v3s16(x,y,z);
 778                         u32 vi = vmanip.m_area.index(p);
 779                         if(vmanip.m_flags[vi] & VMANIP_FLAG_DUNGEON_INSIDE)
 780                         {
 781                                 fits = false;
 782                                 break;
 783                         }
 784                         if(vmanip.m_data[vi].d == CONTENT_IGNORE)
 785                         {
 786                                 fits = false;
 787                                 break;
 788                         }
 789                 }
 790                 if(fits)
 791                         break;
 792         }
 793         // No place found
 794         if(fits == false)
 795                 return;
 796
 797         /*
 798                 Stores the center position of the last room made, so that
 799                 a new corridor can be started from the last room instead of
 800                 the new room, if chosen so.
 801         */
 802         v3s16 last_room_center = roomplace+v3s16(roomsize.X/2,1,roomsize.Z/2);
 803
 804         u32 room_count = random.range(2,7);
 805         for(u32 i=0; i<room_count; i++)
 806         {
 807                 // Make a room to the determined place
 808                 make_room1(vmanip, roomsize, roomplace);
 809
 810                 v3s16 room_center = roomplace + v3s16(roomsize.X/2,1,roomsize.Z/2);
 811
 812                 // Place torch at room center (for testing)
 813                 //vmanip.m_data[vmanip.m_area.index(room_center)] = MapNode(CONTENT_TORCH);
 814
 815                 // Quit if last room
 816                 if(i == room_count-1)
 817                         break;
 818
 819                 // Determine walker start position
 820
 821                 bool start_in_last_room = (random.range(0,1)==0);
 822                 //bool start_in_last_room = true;
 823
 824                 v3s16 walker_start_place;
 825
 826                 if(start_in_last_room)
 827                 {
 828                         walker_start_place = last_room_center;
 829                 }
 830                 else
 831                 {
 832                         walker_start_place = room_center;
 833                         // Store center of current room as the last one
 834                         last_room_center = room_center;
 835                 }
 836
 837                 // Create walker and find a place for a door
 838                 RoomWalker walker(vmanip, walker_start_place, random);
 839                 v3s16 doorplace;
 840                 v3s16 doordir;
 841                 bool r = walker.findPlaceForDoor(doorplace, doordir);
 842                 if(r == false)
 843                         return;
 844
 845                 if(random.range(0,1)==0)
 846                         // Make the door
 847                         make_door1(vmanip, doorplace, doordir);
 848                 else
 849                         // Don't actually make a door
 850                         doorplace -= doordir;
 851
 852                 // Make a random corridor starting from the door
 853                 v3s16 corridor_end;
 854                 v3s16 corridor_end_dir;
 855                 make_corridor(vmanip, doorplace, doordir, corridor_end,
 856                                 corridor_end_dir, random);
 857
 858                 // Find a place for a random sized room
 859                 roomsize = v3s16(random.range(4,8),random.range(4,6),random.range(4,8));
 860                 walker.setPos(corridor_end);
 861                 walker.setDir(corridor_end_dir);
 862                 r = walker.findPlaceForRoomDoor(roomsize, doorplace, doordir, roomplace);
 863                 if(r == false)
 864                         return;
 865
 866                 if(random.range(0,1)==0)
 867                         // Make the door
 868                         make_door1(vmanip, doorplace, doordir);
 869                 else
 870                         // Don't actually make a door
 871                         roomplace -= doordir;
 872
 873         }
 874 }
 875
 876 /*
 877         Noise functions. Make sure seed is mangled differently in each one.
 878 */
 879
 880 // This affects the shape of the contour
 881 //#define CAVE_NOISE_SCALE 10.0
 882 //#define CAVE_NOISE_SCALE 7.5
 883 #define CAVE_NOISE_SCALE 5.0
 884
 885 NoiseParams get_cave_noise1_params(u64 seed)
 886 {
 887         /*return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 5, 0.7,
 888                         200, CAVE_NOISE_SCALE);*/
 889         return NoiseParams(NOISE_PERLIN_CONTOUR, seed+52534, 4, 0.7,
 890                         100, CAVE_NOISE_SCALE);
 891 }
 892
 893 NoiseParams get_cave_noise2_params(u64 seed)
 894 {
 895         /*return NoiseParams(NOISE_PERLIN_CONTOUR_FLIP_YZ, seed+10325, 5, 0.7,
 896                         200, CAVE_NOISE_SCALE);*/
 897         return NoiseParams(NOISE_PERLIN_CONTOUR_FLIP_YZ, seed+10325, 4, 0.7,
 898                         100, CAVE_NOISE_SCALE);
 899 }
 900
 901 //#define CAVE_NOISE_THRESHOLD (2.5/CAVE_NOISE_SCALE)
 902 #define CAVE_NOISE_THRESHOLD (2.0/CAVE_NOISE_SCALE)
 903
 904 NoiseParams get_ground_noise1_params(u64 seed)
 905 {
 906         return NoiseParams(NOISE_PERLIN, seed+983240, 4,
 907                         0.55, 80.0, 40.0);
 908 }
 909
 910 NoiseParams get_ground_crumbleness_params(u64 seed)
 911 {
 912         return NoiseParams(NOISE_PERLIN, seed+34413, 3,
 913                         1.3, 20.0, 1.0);
 914 }
 915
 916 NoiseParams get_ground_wetness_params(u64 seed)
 917 {
 918         return NoiseParams(NOISE_PERLIN, seed+32474, 4,
 919                         1.1, 40.0, 1.0);
 920 }
 921
 922 bool is_cave(u64 seed, v3s16 p)
 923 {
 924         double d1 = noise3d_param(get_cave_noise1_params(seed), p.X,p.Y,p.Z);
 925         double d2 = noise3d_param(get_cave_noise2_params(seed), p.X,p.Y,p.Z);
 926         return d1*d2 > CAVE_NOISE_THRESHOLD;
 927 }
 928
 929 /*
 930         Ground density noise shall be interpreted by using this.
 931
 932         TODO: No perlin noises here, they should be outsourced
 933               and buffered
 934                   NOTE: The speed of these actually isn't terrible
 935 */
 936 bool val_is_ground(double ground_noise1_val, v3s16 p, u64 seed)
 937 {
 938         //return ((double)p.Y < ground_noise1_val);
 939
 940         double f = 0.8 + noise2d_perlin(
 941                         0.5+(float)p.X/250, 0.5+(float)p.Z/250,
 942                         seed+920381, 3, 0.45);
 943         if(f < 0.01)
 944                 f = 0.01;
 945         else if(f >= 1.0)
 946                 f *= 2.0;
 947         double h = WATER_LEVEL + 10 * noise2d_perlin(
 948                         0.5+(float)p.X/250, 0.5+(float)p.Z/250,
 949                         seed+84174, 4, 0.5);
 950         /*double f = 1;
 951         double h = 0;*/
 952         return ((double)p.Y - h < ground_noise1_val * f);
 953 }
 954
 955 /*
 956         Queries whether a position is ground or not.
 957 */
 958 bool is_ground(u64 seed, v3s16 p)
 959 {
 960         double val1 = noise3d_param(get_ground_noise1_params(seed), p.X,p.Y,p.Z);
 961         return val_is_ground(val1, p, seed);
 962 }
 963
 964 // Amount of trees per area in nodes
 965 double tree_amount_2d(u64 seed, v2s16 p)
 966 {
 967         /*double noise = noise2d_perlin(
 968                         0.5+(float)p.X/250, 0.5+(float)p.Y/250,
 969                         seed+2, 5, 0.66);*/
 970         double noise = noise2d_perlin(
 971                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 972                         seed+2, 4, 0.66);
 973         double zeroval = -0.35;
 974         if(noise < zeroval)
 975                 return 0;
 976         else
 977                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 978 }
 979
 980 #if 0
 981 double randomstone_amount_2d(u64 seed, v2s16 p)
 982 {
 983         double noise = noise2d_perlin(
 984                         0.5+(float)p.X/250, 0.5+(float)p.Y/250,
 985                         seed+3829434, 5, 0.66);
 986         double zeroval = 0.1;
 987         if(noise < zeroval)
 988                 return 0;
 989         else
 990                 return 0.01 * (noise-zeroval) / (1.0-zeroval);
 991 }
 992 #endif
 993
 994 double largestone_amount_2d(u64 seed, v2s16 p)
 995 {
 996         double noise = noise2d_perlin(
 997                         0.5+(float)p.X/250, 0.5+(float)p.Y/250,
 998                         seed+14143242, 5, 0.66);
 999         double zeroval = 0.3;
1000         if(noise < zeroval)
1001                 return 0;
1002         else
1003                 return 0.005 * (noise-zeroval) / (1.0-zeroval);
1004 }
1005
1006 /*
1007         Incrementally find ground level from 3d noise
1008 */
1009 s16 find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
1010 {
1011         // Start a bit fuzzy to make averaging lower precision values
1012         // more useful
1013         s16 level = myrand_range(-precision/2, precision/2);
1014         s16 dec[] = {31000, 100, 20, 4, 1, 0};
1015         s16 i;
1016         for(i = 1; dec[i] != 0 && precision <= dec[i]; i++)
1017         {
1018                 // First find non-ground by going upwards
1019                 // Don't stop in caves.
1020                 {
1021                         s16 max = level+dec[i-1]*2;
1022                         v3s16 p(p2d.X, level, p2d.Y);
1023                         for(; p.Y < max; p.Y += dec[i])
1024                         {
1025                                 if(!is_ground(seed, p))
1026                                 {
1027                                         level = p.Y;
1028                                         break;
1029                                 }
1030                         }
1031                 }
1032                 // Then find ground by going downwards from there.
1033                 // Go in caves, too, when precision is 1.
1034                 {
1035                         s16 min = level-dec[i-1]*2;
1036                         v3s16 p(p2d.X, level, p2d.Y);
1037                         for(; p.Y>min; p.Y-=dec[i])
1038                         {
1039                                 bool ground = is_ground(seed, p);
1040                                 /*if(dec[i] == 1 && is_cave(seed, p))
1041                                         ground = false;*/
1042                                 if(ground)
1043                                 {
1044                                         level = p.Y;
1045                                         break;
1046                                 }
1047                         }
1048                 }
1049         }
1050
1051         // This is more like the actual ground level
1052         level += dec[i-1]/2;
1053
1054         return level;
1055 }
1056
1057 double get_sector_average_ground_level(u64 seed, v2s16 sectorpos, double p=4);
1058
1059 double get_sector_average_ground_level(u64 seed, v2s16 sectorpos, double p)
1060 {
1061         v2s16 node_min = sectorpos*MAP_BLOCKSIZE;
1062         v2s16 node_max = (sectorpos+v2s16(1,1))*MAP_BLOCKSIZE-v2s16(1,1);
1063         double a = 0;
1064         a += find_ground_level_from_noise(seed,
1065                         v2s16(node_min.X, node_min.Y), p);
1066         a += find_ground_level_from_noise(seed,
1067                         v2s16(node_min.X, node_max.Y), p);
1068         a += find_ground_level_from_noise(seed,
1069                         v2s16(node_max.X, node_max.Y), p);
1070         a += find_ground_level_from_noise(seed,
1071                         v2s16(node_max.X, node_min.Y), p);
1072         a += find_ground_level_from_noise(seed,
1073                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y+MAP_BLOCKSIZE/2), p);
1074         a /= 5;
1075         return a;
1076 }
1077
1078 double get_sector_maximum_ground_level(u64 seed, v2s16 sectorpos, double p=4);
1079
1080 double get_sector_maximum_ground_level(u64 seed, v2s16 sectorpos, double p)
1081 {
1082         v2s16 node_min = sectorpos*MAP_BLOCKSIZE;
1083         v2s16 node_max = (sectorpos+v2s16(1,1))*MAP_BLOCKSIZE-v2s16(1,1);
1084         double a = -31000;
1085         a = MYMAX(a, find_ground_level_from_noise(seed,
1086                         v2s16(node_min.X, node_min.Y), p));
1087         a = MYMAX(a, find_ground_level_from_noise(seed,
1088                         v2s16(node_min.X, node_max.Y), p));
1089         a = MYMAX(a, find_ground_level_from_noise(seed,
1090                         v2s16(node_max.X, node_max.Y), p));
1091         a = MYMAX(a, find_ground_level_from_noise(seed,
1092                         v2s16(node_min.X, node_min.Y), p));
1093         a = MYMAX(a, find_ground_level_from_noise(seed,
1094                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y+MAP_BLOCKSIZE/2), p));
1095         return a;
1096 }
1097
1098 double get_sector_minimum_ground_level(u64 seed, v2s16 sectorpos, double p=4);
1099
1100 double get_sector_minimum_ground_level(u64 seed, v2s16 sectorpos, double p)
1101 {
1102         v2s16 node_min = sectorpos*MAP_BLOCKSIZE;
1103         v2s16 node_max = (sectorpos+v2s16(1,1))*MAP_BLOCKSIZE-v2s16(1,1);
1104         double a = 31000;
1105         a = MYMIN(a, find_ground_level_from_noise(seed,
1106                         v2s16(node_min.X, node_min.Y), p));
1107         a = MYMIN(a, find_ground_level_from_noise(seed,
1108                         v2s16(node_min.X, node_max.Y), p));
1109         a = MYMIN(a, find_ground_level_from_noise(seed,
1110                         v2s16(node_max.X, node_max.Y), p));
1111         a = MYMIN(a, find_ground_level_from_noise(seed,
1112                         v2s16(node_min.X, node_min.Y), p));
1113         a = MYMIN(a, find_ground_level_from_noise(seed,
1114                         v2s16(node_min.X+MAP_BLOCKSIZE/2, node_min.Y+MAP_BLOCKSIZE/2), p));
1115         return a;
1116 }
1117
1118 bool block_is_underground(u64 seed, v3s16 blockpos)
1119 {
1120         s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
1121                         seed, v2s16(blockpos.X, blockpos.Z));
1122
1123         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
1124                 return true;
1125         else
1126                 return false;
1127 }
1128
1129 #if 0
1130 #define AVERAGE_MUD_AMOUNT 4
1131
1132 double base_rock_level_2d(u64 seed, v2s16 p)
1133 {
1134         // The base ground level
1135         double base = (double)WATER_LEVEL - (double)AVERAGE_MUD_AMOUNT
1136                         + 20. * noise2d_perlin(
1137                         0.5+(float)p.X/500., 0.5+(float)p.Y/500.,
1138                         (seed>>32)+654879876, 6, 0.6);
1139
1140         /*// A bit hillier one
1141         double base2 = WATER_LEVEL - 4.0 + 40. * noise2d_perlin(
1142                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1143                         (seed>>27)+90340, 6, 0.69);
1144         if(base2 > base)
1145                 base = base2;*/
1146 #if 1
1147         // Higher ground level
1148         double higher = (double)WATER_LEVEL + 25. + 35. * noise2d_perlin(
1149                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1150                         seed+85039, 5, 0.69);
1151         //higher = 30; // For debugging
1152
1153         // Limit higher to at least base
1154         if(higher < base)
1155                 higher = base;
1156
1157         // Steepness factor of cliffs
1158         double b = 1.0 + 1.0 * noise2d_perlin(
1159                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1160                         seed-932, 7, 0.7);
1161         b = rangelim(b, 0.0, 1000.0);
1162         b = pow(b, 5);
1163         b *= 7;
1164         b = rangelim(b, 3.0, 1000.0);
1165         //dstream<<"b="<<b<<std::endl;
1166         //double b = 20;
1167
1168         // Offset to more low
1169         double a_off = -0.2;
1170         // High/low selector
1171         /*double a = 0.5 + b * (a_off + noise2d_perlin(
1172                         0.5+(float)p.X/500., 0.5+(float)p.Y/500.,
1173                         seed-359, 6, 0.7));*/
1174         double a = (double)0.5 + b * (a_off + noise2d_perlin(
1175                         0.5+(float)p.X/250., 0.5+(float)p.Y/250.,
1176                         seed-359, 5, 0.60));
1177         // Limit
1178         a = rangelim(a, 0.0, 1.0);
1179
1180         //dstream<<"a="<<a<<std::endl;
1181
1182         double h = base*(1.0-a) + higher*a;
1183 #else
1184         double h = base;
1185 #endif
1186         return h;
1187 }
1188
1189 double get_mud_add_amount(u64 seed, v2s16 p)
1190 {
1191         return ((float)AVERAGE_MUD_AMOUNT + 3.0 * noise2d_perlin(
1192                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
1193                         seed+91013, 3, 0.55));
1194 }
1195 #endif
1196
1197 bool get_have_sand(u64 seed, v2s16 p2d)
1198 {
1199         // Determine whether to have sand here
1200         double sandnoise = noise2d_perlin(
1201                         0.5+(float)p2d.X/500, 0.5+(float)p2d.Y/500,
1202                         seed+59420, 3, 0.50);
1203
1204         return (sandnoise > -0.15);
1205 }
1206
1207 /*
1208         Adds random objects to block, depending on the content of the block
1209 */
1210 void add_random_objects(MapBlock *block)
1211 {
1212         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
1213         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
1214         {
1215                 bool last_node_walkable = false;
1216                 for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
1217                 {
1218                         v3s16 p(x0,y0,z0);
1219                         MapNode n = block->getNodeNoEx(p);
1220                         if(n.d == CONTENT_IGNORE)
1221                                 continue;
1222                         if(content_features(n.d).liquid_type != LIQUID_NONE)
1223                                 continue;
1224                         if(content_features(n.d).walkable)
1225                         {
1226                                 last_node_walkable = true;
1227                                 continue;
1228                         }
1229                         if(last_node_walkable)
1230                         {
1231                                 // If block contains light information
1232                                 if(content_features(n.d).param_type == CPT_LIGHT)
1233                                 {
1234                                         if(n.getLight(LIGHTBANK_DAY) <= 3)
1235                                         {
1236                                                 if(myrand() % 300 == 0)
1237                                                 {
1238                                                         v3f pos_f = intToFloat(p+block->getPosRelative(), BS);
1239                                                         pos_f.Y -= BS*0.4;
1240                                                         ServerActiveObject *obj = new RatSAO(NULL, 0, pos_f);
1241                                                         std::string data = obj->getStaticData();
1242                                                         StaticObject s_obj(obj->getType(),
1243                                                                         obj->getBasePosition(), data);
1244                                                         // Add some
1245                                                         block->m_static_objects.insert(0, s_obj);
1246                                                         block->m_static_objects.insert(0, s_obj);
1247                                                         block->m_static_objects.insert(0, s_obj);
1248                                                         block->m_static_objects.insert(0, s_obj);
1249                                                         block->m_static_objects.insert(0, s_obj);
1250                                                         block->m_static_objects.insert(0, s_obj);
1251                                                         delete obj;
1252                                                 }
1253                                                 if(myrand() % 1000 == 0)
1254                                                 {
1255                                                         v3f pos_f = intToFloat(p+block->getPosRelative(), BS);
1256                                                         pos_f.Y -= BS*0.4;
1257                                                         ServerActiveObject *obj = new Oerkki1SAO(NULL,0,pos_f);
1258                                                         std::string data = obj->getStaticData();
1259                                                         StaticObject s_obj(obj->getType(),
1260                                                                         obj->getBasePosition(), data);
1261                                                         // Add one
1262                                                         block->m_static_objects.insert(0, s_obj);
1263                                                         delete obj;
1264                                                 }
1265                                         }
1266                                 }
1267                         }
1268                         last_node_walkable = false;
1269                 }
1270         }
1271         block->setChangedFlag();
1272 }
1273
1274 void make_block(BlockMakeData *data)
1275 {
1276         if(data->no_op)
1277         {
1278                 dstream<<"makeBlock: no-op"<<std::endl;
1279                 return;
1280         }
1281
1282         v3s16 blockpos = data->blockpos;
1283
1284         /*dstream<<"makeBlock(): ("<<blockpos.X<<","<<blockpos.Y<<","
1285                         <<blockpos.Z<<")"<<std::endl;*/
1286
1287         ManualMapVoxelManipulator &vmanip = *(data->vmanip);
1288         v3s16 blockpos_min = blockpos - v3s16(1,1,1);
1289         v3s16 blockpos_max = blockpos + v3s16(1,1,1);
1290         // Area of center block
1291         v3s16 node_min = blockpos*MAP_BLOCKSIZE;
1292         v3s16 node_max = (blockpos+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
1293         // Full allocated area
1294         v3s16 full_node_min = (blockpos-1)*MAP_BLOCKSIZE;
1295         v3s16 full_node_max = (blockpos+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
1296         // Area of a block
1297         double block_area_nodes = MAP_BLOCKSIZE*MAP_BLOCKSIZE;
1298
1299         v2s16 p2d_center(node_min.X+MAP_BLOCKSIZE/2, node_min.Z+MAP_BLOCKSIZE/2);
1300
1301         /*
1302                 Get average ground level from noise
1303         */
1304
1305         s16 approx_groundlevel = (s16)get_sector_average_ground_level(
1306                         data->seed, v2s16(blockpos.X, blockpos.Z));
1307         //dstream<<"approx_groundlevel="<<approx_groundlevel<<std::endl;
1308
1309         s16 approx_ground_depth = approx_groundlevel - (node_min.Y+MAP_BLOCKSIZE/2);
1310
1311         s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
1312                         data->seed, v2s16(blockpos.X, blockpos.Z));
1313         // Minimum amount of ground above the top of the central block
1314         s16 minimum_ground_depth = minimum_groundlevel - node_max.Y;
1315
1316         s16 maximum_groundlevel = (s16)get_sector_maximum_ground_level(
1317                         data->seed, v2s16(blockpos.X, blockpos.Z), 1);
1318         // Maximum amount of ground above the bottom of the central block
1319         s16 maximum_ground_depth = maximum_groundlevel - node_min.Y;
1320
1321         /*
1322                 Special case for high air or water: Just fill with air and water.
1323         */
1324         if(maximum_ground_depth < -20)
1325         {
1326                 for(s16 x=node_min.X; x<=node_max.X; x++)
1327                 for(s16 z=node_min.Z; z<=node_max.Z; z++)
1328                 {
1329                         // Node position
1330                         v2s16 p2d(x,z);
1331                         {
1332                                 // Use fast index incrementing
1333                                 v3s16 em = vmanip.m_area.getExtent();
1334                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, node_min.Y, p2d.Y));
1335                                 for(s16 y=node_min.Y; y<=node_max.Y; y++)
1336                                 {
1337                                         // Only modify places that have no content
1338                                         if(vmanip.m_data[i].d == CONTENT_IGNORE)
1339                                         {
1340                                                 if(y <= WATER_LEVEL)
1341                                                         vmanip.m_data[i] = MapNode(CONTENT_WATERSOURCE);
1342                                                 else
1343                                                         vmanip.m_data[i] = MapNode(CONTENT_AIR);
1344                                         }
1345
1346                                         data->vmanip->m_area.add_y(em, i, 1);
1347                                 }
1348                         }
1349                 }
1350
1351                 // We're done
1352                 return;
1353         }
1354
1355         /*
1356                 If block is deep underground, this is set to true and ground
1357                 density noise is not generated, for speed optimization.
1358         */
1359         bool all_is_ground_except_caves = (minimum_ground_depth > 16);
1360
1361         /*
1362                 Create a block-specific seed
1363         */
1364         u32 blockseed = (data->seed%0x100000000) + full_node_min.Z*38134234
1365                         + full_node_min.Y*42123 + full_node_min.X*23;
1366
1367         /*
1368                 Make some 3D noise
1369         */
1370
1371         //NoiseBuffer noisebuf1;
1372         //NoiseBuffer noisebuf2;
1373         NoiseBuffer noisebuf_cave;
1374         NoiseBuffer noisebuf_ground;
1375         NoiseBuffer noisebuf_ground_crumbleness;
1376         NoiseBuffer noisebuf_ground_wetness;
1377         {
1378                 v3f minpos_f(node_min.X, node_min.Y, node_min.Z);
1379                 v3f maxpos_f(node_max.X, node_max.Y, node_max.Z);
1380
1381                 //TimeTaker timer("noisebuf.create");
1382
1383                 /*
1384                         Cave noise
1385                 */
1386
1387                 noisebuf_cave.create(get_cave_noise1_params(data->seed),
1388                                 minpos_f.X, minpos_f.Y, minpos_f.Z,
1389                                 maxpos_f.X, maxpos_f.Y, maxpos_f.Z,
1390                                 4, 3, 4);
1391
1392                 noisebuf_cave.multiply(get_cave_noise2_params(data->seed));
1393
1394                 /*
1395                         Ground noise
1396                 */
1397
1398                 // Sample length
1399                 v3f sl = v3f(4.0, 4.0, 4.0);
1400
1401                 /*
1402                         Density noise
1403                 */
1404                 if(all_is_ground_except_caves == false)
1405                         //noisebuf_ground.create(data->seed+983240, 6, 0.60, false,
1406                         noisebuf_ground.create(get_ground_noise1_params(data->seed),
1407                                         minpos_f.X, minpos_f.Y, minpos_f.Z,
1408                                         maxpos_f.X, maxpos_f.Y, maxpos_f.Z,
1409                                         sl.X, sl.Y, sl.Z);
1410
1411                 /*
1412                         Ground property noise
1413                 */
1414                 sl = v3f(2.5, 2.5, 2.5);
1415                 noisebuf_ground_crumbleness.create(
1416                                 get_ground_crumbleness_params(data->seed),
1417                                 minpos_f.X, minpos_f.Y, minpos_f.Z,
1418                                 maxpos_f.X, maxpos_f.Y+5, maxpos_f.Z,
1419                                 sl.X, sl.Y, sl.Z);
1420                 noisebuf_ground_wetness.create(
1421                                 get_ground_wetness_params(data->seed),
1422                                 minpos_f.X, minpos_f.Y, minpos_f.Z,
1423                                 maxpos_f.X, maxpos_f.Y+5, maxpos_f.Z,
1424                                 sl.X, sl.Y, sl.Z);
1425         }
1426
1427         /*
1428                 Make base ground level
1429         */
1430
1431         for(s16 x=node_min.X; x<=node_max.X; x++)
1432         for(s16 z=node_min.Z; z<=node_max.Z; z++)
1433         {
1434                 // Node position
1435                 v2s16 p2d(x,z);
1436                 {
1437                         // Use fast index incrementing
1438                         v3s16 em = vmanip.m_area.getExtent();
1439                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_min.Y, p2d.Y));
1440                         for(s16 y=node_min.Y; y<=node_max.Y; y++)
1441                         {
1442                                 // Only modify places that have no content
1443                                 if(vmanip.m_data[i].d == CONTENT_IGNORE)
1444                                 {
1445                                         // First priority: make air and water.
1446                                         // This avoids caves inside water.
1447                                         if(all_is_ground_except_caves == false
1448                                                         && val_is_ground(noisebuf_ground.get(x,y,z),
1449                                                         v3s16(x,y,z), data->seed) == false)
1450                                         {
1451                                                 if(y <= WATER_LEVEL)
1452                                                         vmanip.m_data[i] = MapNode(CONTENT_WATERSOURCE);
1453                                                 else
1454                                                         vmanip.m_data[i] = MapNode(CONTENT_AIR);
1455                                         }
1456                                         else if(noisebuf_cave.get(x,y,z) > CAVE_NOISE_THRESHOLD)
1457                                                 vmanip.m_data[i] = MapNode(CONTENT_AIR);
1458                                         else
1459                                                 vmanip.m_data[i] = MapNode(CONTENT_STONE);
1460                                 }
1461
1462                                 data->vmanip->m_area.add_y(em, i, 1);
1463                         }
1464                 }
1465         }
1466
1467         /*
1468                 Add minerals
1469         */
1470
1471         {
1472                 PseudoRandom mineralrandom(blockseed);
1473
1474                 /*
1475                         Add meseblocks
1476                 */
1477                 for(s16 i=0; i<approx_ground_depth/4; i++)
1478                 {
1479                         if(mineralrandom.next()%50 == 0)
1480                         {
1481                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
1482                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
1483                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
1484                                 for(u16 i=0; i<27; i++)
1485                                 {
1486                                         v3s16 p = v3s16(x,y,z) + g_27dirs[i];
1487                                         u32 vi = vmanip.m_area.index(p);
1488                                         if(vmanip.m_data[vi].d == CONTENT_STONE)
1489                                                 if(mineralrandom.next()%8 == 0)
1490                                                         vmanip.m_data[vi] = MapNode(CONTENT_MESE);
1491                                 }
1492
1493                         }
1494                 }
1495                 /*
1496                         Add others
1497                 */
1498                 {
1499                         u16 a = mineralrandom.range(0,15);
1500                         a = a*a*a;
1501                         u16 amount = 20 * a/1000;
1502                         for(s16 i=0; i<amount; i++)
1503                         {
1504                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
1505                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
1506                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
1507
1508                                 u8 base_content = CONTENT_STONE;
1509                                 MapNode new_content(CONTENT_IGNORE);
1510                                 u32 sparseness = 6;
1511
1512                                 if(noisebuf_ground_crumbleness.get(x,y+5,z) < -0.1)
1513                                 {
1514                                         new_content = MapNode(CONTENT_STONE, MINERAL_COAL);
1515                                 }
1516                                 else
1517                                 {
1518                                         if(noisebuf_ground_wetness.get(x,y+5,z) > 0.0)
1519                                                 new_content = MapNode(CONTENT_STONE, MINERAL_IRON);
1520                                         /*if(noisebuf_ground_wetness.get(x,y,z) > 0.0)
1521                                                 vmanip.m_data[i] = MapNode(CONTENT_MUD);
1522                                         else
1523                                                 vmanip.m_data[i] = MapNode(CONTENT_SAND);*/
1524                                 }
1525                                 /*else if(noisebuf_ground_crumbleness.get(x,y,z) > 0.1)
1526                                 {
1527                                 }*/
1528
1529                                 if(new_content.d != CONTENT_IGNORE)
1530                                 {
1531                                         for(u16 i=0; i<27; i++)
1532                                         {
1533                                                 v3s16 p = v3s16(x,y,z) + g_27dirs[i];
1534                                                 u32 vi = vmanip.m_area.index(p);
1535                                                 if(vmanip.m_data[vi].d == base_content)
1536                                                 {
1537                                                         if(mineralrandom.next()%sparseness == 0)
1538                                                                 vmanip.m_data[vi] = new_content;
1539                                                 }
1540                                         }
1541                                 }
1542                         }
1543                 }
1544                 /*
1545                         Add coal
1546                 */
1547                 //for(s16 i=0; i < MYMAX(0, 50 - abs(node_min.Y+8 - (-30))); i++)
1548                 //for(s16 i=0; i<50; i++)
1549                 u16 coal_amount = 30;
1550                 u16 coal_rareness = 60 / coal_amount;
1551                 if(coal_rareness == 0)
1552                         coal_rareness = 1;
1553                 if(mineralrandom.next()%coal_rareness == 0)
1554                 {
1555                         u16 a = mineralrandom.next() % 16;
1556                         u16 amount = coal_amount * a*a*a / 1000;
1557                         for(s16 i=0; i<amount; i++)
1558                         {
1559                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
1560                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
1561                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
1562                                 for(u16 i=0; i<27; i++)
1563                                 {
1564                                         v3s16 p = v3s16(x,y,z) + g_27dirs[i];
1565                                         u32 vi = vmanip.m_area.index(p);
1566                                         if(vmanip.m_data[vi].d == CONTENT_STONE)
1567                                                 if(mineralrandom.next()%8 == 0)
1568                                                         vmanip.m_data[vi] = MapNode(CONTENT_STONE, MINERAL_COAL);
1569                                 }
1570                         }
1571                 }
1572                 /*
1573                         Add iron
1574                 */
1575                 u16 iron_amount = 8;
1576                 u16 iron_rareness = 60 / iron_amount;
1577                 if(iron_rareness == 0)
1578                         iron_rareness = 1;
1579                 if(mineralrandom.next()%iron_rareness == 0)
1580                 {
1581                         u16 a = mineralrandom.next() % 16;
1582                         u16 amount = iron_amount * a*a*a / 1000;
1583                         for(s16 i=0; i<amount; i++)
1584                         {
1585                                 s16 x = mineralrandom.range(node_min.X+1, node_max.X-1);
1586                                 s16 y = mineralrandom.range(node_min.Y+1, node_max.Y-1);
1587                                 s16 z = mineralrandom.range(node_min.Z+1, node_max.Z-1);
1588                                 for(u16 i=0; i<27; i++)
1589                                 {
1590                                         v3s16 p = v3s16(x,y,z) + g_27dirs[i];
1591                                         u32 vi = vmanip.m_area.index(p);
1592                                         if(vmanip.m_data[vi].d == CONTENT_STONE)
1593                                                 if(mineralrandom.next()%8 == 0)
1594                                                         vmanip.m_data[vi] = MapNode(CONTENT_STONE, MINERAL_IRON);
1595                                 }
1596                         }
1597                 }
1598         }
1599
1600         /*
1601                 Add mud and sand and others underground (in place of stone)
1602         */
1603
1604         for(s16 x=node_min.X; x<=node_max.X; x++)
1605         for(s16 z=node_min.Z; z<=node_max.Z; z++)
1606         {
1607                 // Node position
1608                 v2s16 p2d(x,z);
1609                 {
1610                         // Use fast index incrementing
1611                         v3s16 em = vmanip.m_area.getExtent();
1612                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
1613                         for(s16 y=node_max.Y; y>=node_min.Y; y--)
1614                         {
1615                                 if(vmanip.m_data[i].d == CONTENT_STONE)
1616                                 {
1617                                         if(noisebuf_ground_crumbleness.get(x,y,z) > 1.3)
1618                                         {
1619                                                 if(noisebuf_ground_wetness.get(x,y,z) > 0.0)
1620                                                         vmanip.m_data[i] = MapNode(CONTENT_MUD);
1621                                                 else
1622                                                         vmanip.m_data[i] = MapNode(CONTENT_SAND);
1623                                         }
1624                                         else if(noisebuf_ground_crumbleness.get(x,y,z) > 0.7)
1625                                         {
1626                                                 if(noisebuf_ground_wetness.get(x,y,z) < -0.6)
1627                                                         vmanip.m_data[i] = MapNode(CONTENT_GRAVEL);
1628                                         }
1629                                 }
1630
1631                                 data->vmanip->m_area.add_y(em, i, -1);
1632                         }
1633                 }
1634         }
1635
1636         /*
1637                 Add dungeons
1638         */
1639
1640         //if(node_min.Y < approx_groundlevel)
1641         //if(myrand() % 3 == 0)
1642         //if(myrand() % 3 == 0 && node_min.Y < approx_groundlevel)
1643         //if(myrand() % 100 == 0 && node_min.Y < approx_groundlevel)
1644         //float dungeon_rarity = g_settings.getFloat("dungeon_rarity");
1645         float dungeon_rarity = 0.02;
1646         if(((noise3d(blockpos.X,blockpos.Y,blockpos.Z,data->seed)+1.0)/2.0)
1647                         < dungeon_rarity
1648                         && node_min.Y < approx_groundlevel)
1649         {
1650                 // Dungeon generator doesn't modify places which have this set
1651                 data->vmanip->clearFlag(VMANIP_FLAG_DUNGEON_INSIDE
1652                                 | VMANIP_FLAG_DUNGEON_PRESERVE);
1653
1654                 // Set all air and water to be untouchable to make dungeons open
1655                 // to caves and open air
1656                 for(s16 x=full_node_min.X; x<=full_node_max.X; x++)
1657                 for(s16 z=full_node_min.Z; z<=full_node_max.Z; z++)
1658                 {
1659                         // Node position
1660                         v2s16 p2d(x,z);
1661                         {
1662                                 // Use fast index incrementing
1663                                 v3s16 em = vmanip.m_area.getExtent();
1664                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, full_node_max.Y, p2d.Y));
1665                                 for(s16 y=full_node_max.Y; y>=full_node_min.Y; y--)
1666                                 {
1667                                         if(vmanip.m_data[i].d == CONTENT_AIR)
1668                                                 vmanip.m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
1669                                         else if(vmanip.m_data[i].d == CONTENT_WATERSOURCE)
1670                                                 vmanip.m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
1671                                         data->vmanip->m_area.add_y(em, i, -1);
1672                                 }
1673                         }
1674                 }
1675
1676                 PseudoRandom random(blockseed+2);
1677
1678                 // Add it
1679                 make_dungeon1(vmanip, random);
1680
1681                 // Convert some cobble to mossy cobble
1682                 for(s16 x=full_node_min.X; x<=full_node_max.X; x++)
1683                 for(s16 z=full_node_min.Z; z<=full_node_max.Z; z++)
1684                 {
1685                         // Node position
1686                         v2s16 p2d(x,z);
1687                         {
1688                                 // Use fast index incrementing
1689                                 v3s16 em = vmanip.m_area.getExtent();
1690                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, full_node_max.Y, p2d.Y));
1691                                 for(s16 y=full_node_max.Y; y>=full_node_min.Y; y--)
1692                                 {
1693                                         // (noisebuf not used because it doesn't contain the
1694                                         //  full area)
1695                                         double wetness = noise3d_param(
1696                                                         get_ground_wetness_params(data->seed), x,y,z);
1697                                         double d = noise3d_perlin((float)x/2.5,
1698                                                         (float)y/2.5,(float)z/2.5,
1699                                                         blockseed, 2, 1.4);
1700                                         if(vmanip.m_data[i].d == CONTENT_COBBLE)
1701                                         {
1702                                                 if(d < wetness/3.0)
1703                                                 {
1704                                                         vmanip.m_data[i].d = CONTENT_MOSSYCOBBLE;
1705                                                 }
1706                                         }
1707                                         /*else if(vmanip.m_flags[i] & VMANIP_FLAG_DUNGEON_INSIDE)
1708                                         {
1709                                                 if(wetness > 1.2)
1710                                                         vmanip.m_data[i].d = CONTENT_MUD;
1711                                         }*/
1712                                         data->vmanip->m_area.add_y(em, i, -1);
1713                                 }
1714                         }
1715                 }
1716         }
1717
1718         /*
1719                 Add top and bottom side of water to transforming_liquid queue
1720         */
1721
1722         for(s16 x=node_min.X; x<=node_max.X; x++)
1723         for(s16 z=node_min.Z; z<=node_max.Z; z++)
1724         {
1725                 // Node position
1726                 v2s16 p2d(x,z);
1727                 {
1728                         bool water_found = false;
1729                         // Use fast index incrementing
1730                         v3s16 em = vmanip.m_area.getExtent();
1731                         u32 i = vmanip.m_area.index(v3s16(p2d.X, node_max.Y, p2d.Y));
1732                         for(s16 y=node_max.Y; y>=node_min.Y; y--)
1733                         {
1734                                 if(water_found == false)
1735                                 {
1736                                         if(vmanip.m_data[i].d == CONTENT_WATERSOURCE)
1737                                         {
1738                                                 v3s16 p = v3s16(p2d.X, y, p2d.Y);
1739                                                 data->transforming_liquid.push_back(p);
1740                                                 water_found = true;
1741                                         }
1742                                 }
1743                                 else
1744                                 {
1745                                         // This can be done because water_found can only
1746                                         // turn to true and end up here after going through
1747                                         // a single block.
1748                                         if(vmanip.m_data[i+1].d != CONTENT_WATERSOURCE)
1749                                         {
1750                                                 v3s16 p = v3s16(p2d.X, y+1, p2d.Y);
1751                                                 data->transforming_liquid.push_back(p);
1752                                                 water_found = false;
1753                                         }
1754                                 }
1755
1756                                 data->vmanip->m_area.add_y(em, i, -1);
1757                         }
1758                 }
1759         }
1760
1761         /*
1762                 If close to ground level
1763         */
1764
1765         //if(abs(approx_ground_depth) < 30)
1766         if(minimum_ground_depth < 5 && maximum_ground_depth > -5)
1767         {
1768                 /*
1769                         Add grass and mud
1770                 */
1771
1772                 for(s16 x=node_min.X; x<=node_max.X; x++)
1773                 for(s16 z=node_min.Z; z<=node_max.Z; z++)
1774                 {
1775                         // Node position
1776                         v2s16 p2d(x,z);
1777                         {
1778                                 bool possibly_have_sand = get_have_sand(data->seed, p2d);
1779                                 bool have_sand = false;
1780                                 u32 current_depth = 0;
1781                                 bool air_detected = false;
1782                                 bool water_detected = false;
1783                                 bool have_clay = false;
1784
1785                                 // Determine whether to have clay in the sand here
1786                                 double claynoise = noise2d_perlin(
1787                                                 0.5+(float)p2d.X/500, 0.5+(float)p2d.Y/500,
1788                                                 data->seed+4321, 6, 0.95);
1789
1790                                 have_clay = have_sand && (claynoise > 1.25);
1791
1792                                 // Use fast index incrementing
1793                                 s16 start_y = node_max.Y+2;
1794                                 v3s16 em = vmanip.m_area.getExtent();
1795                                 u32 i = vmanip.m_area.index(v3s16(p2d.X, start_y, p2d.Y));
1796                                 for(s16 y=start_y; y>=node_min.Y-3; y--)
1797                                 {
1798                                         if(vmanip.m_data[i].d == CONTENT_WATERSOURCE)
1799                                                 water_detected = true;
1800                                         if(vmanip.m_data[i].d == CONTENT_AIR)
1801                                                 air_detected = true;
1802
1803                                         if((vmanip.m_data[i].d == CONTENT_STONE
1804                                                         || vmanip.m_data[i].d == CONTENT_GRASS
1805                                                         || vmanip.m_data[i].d == CONTENT_MUD
1806                                                         || vmanip.m_data[i].d == CONTENT_SAND
1807                                                         || vmanip.m_data[i].d == CONTENT_GRAVEL
1808                                                         ) && (air_detected || water_detected))
1809                                         {
1810                                                 if(current_depth == 0 && y <= WATER_LEVEL+2
1811                                                                 && possibly_have_sand)
1812                                                         have_sand = true;
1813
1814                                                 if(current_depth < 4)
1815                                                 {
1816                                                         if(have_sand)
1817                                                         {
1818                                                                 if (have_clay)
1819                                                                         vmanip.m_data[i] = MapNode(CONTENT_CLAY);
1820                                                                 else
1821                                                                         vmanip.m_data[i] = MapNode(CONTENT_SAND);
1822                                                         }
1823                                                         #if 1
1824                                                         else if(current_depth==0 && !water_detected
1825                                                                         && y >= WATER_LEVEL && air_detected)
1826                                                                 vmanip.m_data[i] = MapNode(CONTENT_GRASS);
1827                                                         #endif
1828                                                         else
1829                                                                 vmanip.m_data[i] = MapNode(CONTENT_MUD);
1830                                                 }
1831                                                 else
1832                                                 {
1833                                                         if(vmanip.m_data[i].d == CONTENT_MUD
1834                                                                 || vmanip.m_data[i].d == CONTENT_GRASS)
1835                                                                 vmanip.m_data[i] = MapNode(CONTENT_STONE);
1836                                                 }
1837
1838                                                 current_depth++;
1839
1840                                                 if(current_depth >= 8)
1841                                                         break;
1842                                         }
1843                                         else if(current_depth != 0)
1844                                                 break;
1845
1846                                         data->vmanip->m_area.add_y(em, i, -1);
1847                                 }
1848                         }
1849                 }
1850
1851                 /*
1852                         Add trees
1853                 */
1854
1855                 // Amount of trees
1856                 u32 tree_count = block_area_nodes * tree_amount_2d(data->seed, p2d_center);
1857                 PseudoRandom treerandom(blockseed);
1858                 // Put trees in random places on part of division
1859                 for(u32 i=0; i<tree_count; i++)
1860                 {
1861                         s16 x = treerandom.range(node_min.X, node_max.X);
1862                         s16 z = treerandom.range(node_min.Z, node_max.Z);
1863                         //s16 y = find_ground_level(data->vmanip, v2s16(x,z));
1864                         s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 4);
1865                         // Don't make a tree under water level
1866                         if(y < WATER_LEVEL)
1867                                 continue;
1868                         // Make sure tree fits (only trees whose starting point is
1869                         // at this block are added)
1870                         if(y < node_min.Y || y > node_max.Y)
1871                                 continue;
1872                         /*
1873                                 Find exact ground level
1874                         */
1875                         v3s16 p(x,y+6,z);
1876                         bool found = false;
1877                         for(; p.Y >= y-6; p.Y--)
1878                         {
1879                                 u32 i = data->vmanip->m_area.index(p);
1880                                 MapNode *n = &data->vmanip->m_data[i];
1881                                 if(n->d != CONTENT_AIR && n->d != CONTENT_WATERSOURCE && n->d != CONTENT_IGNORE)
1882                                 {
1883                                         found = true;
1884                                         break;
1885                                 }
1886                         }
1887                         // If not found, handle next one
1888                         if(found == false)
1889                                 continue;
1890
1891                         {
1892                                 u32 i = data->vmanip->m_area.index(p);
1893                                 MapNode *n = &data->vmanip->m_data[i];
1894
1895                                 if(n->d != CONTENT_MUD && n->d != CONTENT_GRASS && n->d != CONTENT_SAND)
1896                                                 continue;
1897
1898                                 // Papyrus grows only on mud and in water
1899                                 if(n->d == CONTENT_MUD && y <= WATER_LEVEL)
1900                                 {
1901                                         p.Y++;
1902                                         make_papyrus(vmanip, p);
1903                                 }
1904                                 // Trees grow only on mud and grass, on land
1905                                 else if((n->d == CONTENT_MUD || n->d == CONTENT_GRASS) && y > WATER_LEVEL + 2)
1906                                 {
1907                                         p.Y++;
1908                                         make_tree(vmanip, p);
1909                                 }
1910                                 // Cactii grow only on sand, on land
1911                                 else if(n->d == CONTENT_SAND && y > WATER_LEVEL + 2)
1912                                 {
1913                                         p.Y++;
1914                                         make_cactus(vmanip, p);
1915                                 }
1916                         }
1917                 }
1918
1919 #if 0
1920                 /*
1921                         Add some kind of random stones
1922                 */
1923
1924                 u32 random_stone_count = block_area_nodes *
1925                                 randomstone_amount_2d(data->seed, p2d_center);
1926                 // Put in random places on part of division
1927                 for(u32 i=0; i<random_stone_count; i++)
1928                 {
1929                         s16 x = myrand_range(node_min.X, node_max.X);
1930                         s16 z = myrand_range(node_min.Z, node_max.Z);
1931                         s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 1);
1932                         // Don't add under water level
1933                         /*if(y < WATER_LEVEL)
1934                                 continue;*/
1935                         // Don't add if doesn't belong to this block
1936                         if(y < node_min.Y || y > node_max.Y)
1937                                 continue;
1938                         v3s16 p(x,y,z);
1939                         // Filter placement
1940                         /*{
1941                                 u32 i = data->vmanip->m_area.index(v3s16(p));
1942                                 MapNode *n = &data->vmanip->m_data[i];
1943                                 if(n->d != CONTENT_MUD && n->d != CONTENT_GRASS)
1944                                         continue;
1945                         }*/
1946                         // Will be placed one higher
1947                         p.Y++;
1948                         // Add it
1949                         make_randomstone(data->vmanip, p);
1950                 }
1951 #endif
1952
1953 #if 0
1954                 /*
1955                         Add larger stones
1956                 */
1957
1958                 u32 large_stone_count = block_area_nodes *
1959                                 largestone_amount_2d(data->seed, p2d_center);
1960                 //u32 large_stone_count = 1;
1961                 // Put in random places on part of division
1962                 for(u32 i=0; i<large_stone_count; i++)
1963                 {
1964                         s16 x = myrand_range(node_min.X, node_max.X);
1965                         s16 z = myrand_range(node_min.Z, node_max.Z);
1966                         s16 y = find_ground_level_from_noise(data->seed, v2s16(x,z), 1);
1967                         // Don't add under water level
1968                         /*if(y < WATER_LEVEL)
1969                                 continue;*/
1970                         // Don't add if doesn't belong to this block
1971                         if(y < node_min.Y || y > node_max.Y)
1972                                 continue;
1973                         v3s16 p(x,y,z);
1974                         // Filter placement
1975                         /*{
1976                                 u32 i = data->vmanip->m_area.index(v3s16(p));
1977                                 MapNode *n = &data->vmanip->m_data[i];
1978                                 if(n->d != CONTENT_MUD && n->d != CONTENT_GRASS)
1979                                         continue;
1980                         }*/
1981                         // Will be placed one lower
1982                         p.Y--;
1983                         // Add it
1984                         make_largestone(data->vmanip, p);
1985                 }
1986 #endif
1987         }
1988
1989 }
1990
1991 BlockMakeData::BlockMakeData():
1992         no_op(false),
1993         vmanip(NULL),
1994         seed(0)
1995 {}
1996
1997 BlockMakeData::~BlockMakeData()
1998 {
1999         delete vmanip;
2000 }
2001
2002 }; // namespace mapgen
2003
2004