src/mg_decoration.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser 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 "mg_decoration.h"
  21 #include "mg_schematic.h"
  22 #include "mapgen.h"
  23 #include "noise.h"
  24 #include "map.h"
  25 #include "log.h"
  26 #include "util/numeric.h"
  27
  28 FlagDesc flagdesc_deco[] = {
  29         {"place_center_x", DECO_PLACE_CENTER_X},
  30         {"place_center_y", DECO_PLACE_CENTER_Y},
  31         {"place_center_z", DECO_PLACE_CENTER_Z},
  32         {"force_placement", DECO_FORCE_PLACEMENT},
  33         {"liquid_surface", DECO_LIQUID_SURFACE},
  34         {NULL,             0}
  35 };
  36
  37
  38 ///////////////////////////////////////////////////////////////////////////////
  39
  40
  41 DecorationManager::DecorationManager(IGameDef *gamedef) :
  42         ObjDefManager(gamedef, OBJDEF_DECORATION)
  43 {
  44 }
  45
  46
  47 size_t DecorationManager::placeAllDecos(Mapgen *mg, u32 blockseed,
  48         v3s16 nmin, v3s16 nmax)
  49 {
  50         size_t nplaced = 0;
  51
  52         for (size_t i = 0; i != m_objects.size(); i++) {
  53                 Decoration *deco = (Decoration *)m_objects[i];
  54                 if (!deco)
  55                         continue;
  56
  57                 nplaced += deco->placeDeco(mg, blockseed, nmin, nmax);
  58                 blockseed++;
  59         }
  60
  61         return nplaced;
  62 }
  63
  64
  65 ///////////////////////////////////////////////////////////////////////////////
  66
  67
  68 Decoration::Decoration()
  69 {
  70         mapseed    = 0;
  71         fill_ratio = 0;
  72         sidelen    = 1;
  73         flags      = 0;
  74 }
  75
  76
  77 Decoration::~Decoration()
  78 {
  79 }
  80
  81
  82 void Decoration::resolveNodeNames()
  83 {
  84         getIdsFromNrBacklog(&c_place_on);
  85 }
  86
  87
  88 size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
  89 {
  90         PseudoRandom ps(blockseed + 53);
  91         int carea_size = nmax.X - nmin.X + 1;
  92
  93         // Divide area into parts
  94         // If chunksize is changed it may no longer be divisable by sidelen
  95         if (carea_size % sidelen)
  96                 sidelen = carea_size;
  97
  98         s16 divlen = carea_size / sidelen;
  99         int area = sidelen * sidelen;
 100
 101         for (s16 z0 = 0; z0 < divlen; z0++)
 102         for (s16 x0 = 0; x0 < divlen; x0++) {
 103                 v2s16 p2d_center( // Center position of part of division
 104                         nmin.X + sidelen / 2 + sidelen * x0,
 105                         nmin.Z + sidelen / 2 + sidelen * z0
 106                 );
 107                 v2s16 p2d_min( // Minimum edge of part of division
 108                         nmin.X + sidelen * x0,
 109                         nmin.Z + sidelen * z0
 110                 );
 111                 v2s16 p2d_max( // Maximum edge of part of division
 112                         nmin.X + sidelen + sidelen * x0 - 1,
 113                         nmin.Z + sidelen + sidelen * z0 - 1
 114                 );
 115
 116                 // Amount of decorations
 117                 float nval = (flags & DECO_USE_NOISE) ?
 118                         NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
 119                         fill_ratio;
 120                 u32 deco_count = area * MYMAX(nval, 0.f);
 121
 122                 for (u32 i = 0; i < deco_count; i++) {
 123                         s16 x = ps.range(p2d_min.X, p2d_max.X);
 124                         s16 z = ps.range(p2d_min.Y, p2d_max.Y);
 125
 126                         int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
 127
 128                         s16 y = -MAX_MAP_GENERATION_LIMIT;
 129                         if (flags & DECO_LIQUID_SURFACE)
 130                                 y = mg->findLiquidSurface(v2s16(x, z), nmin.Y, nmax.Y);
 131                         else if (mg->heightmap)
 132                                 y = mg->heightmap[mapindex];
 133                         else
 134                                 y = mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 135
 136                         if (y < nmin.Y || y > nmax.Y ||
 137                                 y < y_min  || y > y_max)
 138                                 continue;
 139
 140                         if (y + getHeight() >= mg->vm->m_area.MaxEdge.Y) {
 141                                 continue;
 142 #if 0
 143                                 printf("Decoration at (%d %d %d) cut off\n", x, y, z);
 144                                 //add to queue
 145                                 MutexAutoLock cutofflock(cutoff_mutex);
 146                                 cutoffs.push_back(CutoffData(x, y, z, height));
 147 #endif
 148                         }
 149
 150                         if (mg->biomemap) {
 151                                 std::set<u8>::iterator iter;
 152
 153                                 if (!biomes.empty()) {
 154                                         iter = biomes.find(mg->biomemap[mapindex]);
 155                                         if (iter == biomes.end())
 156                                                 continue;
 157                                 }
 158                         }
 159
 160                         v3s16 pos(x, y, z);
 161                         if (generate(mg->vm, &ps, pos))
 162                                 mg->gennotify.addEvent(GENNOTIFY_DECORATION, pos, index);
 163                 }
 164         }
 165
 166         return 0;
 167 }
 168
 169
 170 #if 0
 171 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 172 {
 173         PseudoRandom pr(blockseed + 53);
 174         std::vector<CutoffData> handled_cutoffs;
 175
 176         // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
 177         {
 178                 MutexAutoLock cutofflock(cutoff_mutex);
 179                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 180                         i != cutoffs.end(); ++i) {
 181                         CutoffData cutoff = *i;
 182                         v3s16 p    = cutoff.p;
 183                         s16 height = cutoff.height;
 184                         if (p.X < nmin.X || p.X > nmax.X ||
 185                                 p.Z < nmin.Z || p.Z > nmax.Z)
 186                                 continue;
 187                         if (p.Y + height < nmin.Y || p.Y > nmax.Y)
 188                                 continue;
 189
 190                         handled_cutoffs.push_back(cutoff);
 191                 }
 192         }
 193
 194         // Generate the cutoffs
 195         for (size_t i = 0; i != handled_cutoffs.size(); i++) {
 196                 v3s16 p    = handled_cutoffs[i].p;
 197                 s16 height = handled_cutoffs[i].height;
 198
 199                 if (p.Y + height > nmax.Y) {
 200                         //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
 201                         cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
 202                 }
 203
 204                 generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
 205         }
 206
 207         // Remove cutoffs that were handled from the cutoff list
 208         {
 209                 MutexAutoLock cutofflock(cutoff_mutex);
 210                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 211                         i != cutoffs.end(); ++i) {
 212
 213                         for (size_t j = 0; j != handled_cutoffs.size(); j++) {
 214                                 CutoffData coff = *i;
 215                                 if (coff.p == handled_cutoffs[j].p)
 216                                         i = cutoffs.erase(i);
 217                         }
 218                 }
 219         }
 220 }
 221 #endif
 222
 223
 224 ///////////////////////////////////////////////////////////////////////////////
 225
 226
 227 void DecoSimple::resolveNodeNames()
 228 {
 229         Decoration::resolveNodeNames();
 230         getIdsFromNrBacklog(&c_decos);
 231         getIdsFromNrBacklog(&c_spawnby);
 232 }
 233
 234
 235 bool DecoSimple::canPlaceDecoration(MMVManip *vm, v3s16 p)
 236 {
 237         // Don't bother if there aren't any decorations to place
 238         if (c_decos.size() == 0)
 239                 return false;
 240
 241         u32 vi = vm->m_area.index(p);
 242
 243         // Check if the decoration can be placed on this node
 244         if (!CONTAINS(c_place_on, vm->m_data[vi].getContent()))
 245                 return false;
 246
 247         // Don't continue if there are no spawnby constraints
 248         if (nspawnby == -1)
 249                 return true;
 250
 251         int nneighs = 0;
 252         v3s16 dirs[16] = {
 253                 v3s16( 0, 0,  1),
 254                 v3s16( 0, 0, -1),
 255                 v3s16( 1, 0,  0),
 256                 v3s16(-1, 0,  0),
 257                 v3s16( 1, 0,  1),
 258                 v3s16(-1, 0,  1),
 259                 v3s16(-1, 0, -1),
 260                 v3s16( 1, 0, -1),
 261
 262                 v3s16( 0, 1,  1),
 263                 v3s16( 0, 1, -1),
 264                 v3s16( 1, 1,  0),
 265                 v3s16(-1, 1,  0),
 266                 v3s16( 1, 1,  1),
 267                 v3s16(-1, 1,  1),
 268                 v3s16(-1, 1, -1),
 269                 v3s16( 1, 1, -1)
 270         };
 271
 272         // Check a Moore neighborhood if there are enough spawnby nodes
 273         for (size_t i = 0; i != ARRLEN(dirs); i++) {
 274                 u32 index = vm->m_area.index(p + dirs[i]);
 275                 if (!vm->m_area.contains(index))
 276                         continue;
 277
 278                 if (CONTAINS(c_spawnby, vm->m_data[index].getContent()))
 279                         nneighs++;
 280         }
 281
 282         if (nneighs < nspawnby)
 283                 return false;
 284
 285         return true;
 286 }
 287
 288
 289 size_t DecoSimple::generate(MMVManip *vm, PseudoRandom *pr, v3s16 p)
 290 {
 291         if (!canPlaceDecoration(vm, p))
 292                 return 0;
 293
 294         content_t c_place = c_decos[pr->range(0, c_decos.size() - 1)];
 295
 296         s16 height = (deco_height_max > 0) ?
 297                 pr->range(deco_height, deco_height_max) : deco_height;
 298
 299         v3s16 em = vm->m_area.getExtent();
 300         u32 vi = vm->m_area.index(p);
 301         for (int i = 0; i < height; i++) {
 302                 vm->m_area.add_y(em, vi, 1);
 303
 304                 content_t c = vm->m_data[vi].getContent();
 305                 if (c != CONTENT_AIR && c != CONTENT_IGNORE)
 306                         break;
 307
 308                 vm->m_data[vi] = MapNode(c_place);
 309         }
 310
 311         return 1;
 312 }
 313
 314
 315 int DecoSimple::getHeight()
 316 {
 317         return (deco_height_max > 0) ? deco_height_max : deco_height;
 318 }
 319
 320
 321 ///////////////////////////////////////////////////////////////////////////////
 322
 323
 324 DecoSchematic::DecoSchematic()
 325 {
 326         schematic = NULL;
 327 }
 328
 329
 330 size_t DecoSchematic::generate(MMVManip *vm, PseudoRandom *pr, v3s16 p)
 331 {
 332         // Schematic could have been unloaded but not the decoration
 333         // In this case generate() does nothing (but doesn't *fail*)
 334         if (schematic == NULL)
 335                 return 0;
 336
 337         u32 vi = vm->m_area.index(p);
 338         content_t c = vm->m_data[vi].getContent();
 339         if (!CONTAINS(c_place_on, c))
 340                 return 0;
 341
 342         if (flags & DECO_PLACE_CENTER_X)
 343                 p.X -= (schematic->size.X - 1) / 2;
 344         if (flags & DECO_PLACE_CENTER_Y)
 345                 p.Y -= (schematic->size.Y - 1) / 2;
 346         if (flags & DECO_PLACE_CENTER_Z)
 347                 p.Z -= (schematic->size.Z - 1) / 2;
 348
 349         Rotation rot = (rotation == ROTATE_RAND) ?
 350                 (Rotation)pr->range(ROTATE_0, ROTATE_270) : rotation;
 351
 352         bool force_placement = (flags & DECO_FORCE_PLACEMENT);
 353
 354         schematic->blitToVManip(vm, p, rot, force_placement);
 355
 356         return 1;
 357 }
 358
 359
 360 int DecoSchematic::getHeight()
 361 {
 362         return schematic->size.Y;
 363 }