src/mapgen/mapgen_v5.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2014-2018 paramat
   4 Copyright (C) 2014-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21
  22 #include "mapgen.h"
  23 #include "voxel.h"
  24 #include "noise.h"
  25 #include "mapblock.h"
  26 #include "mapnode.h"
  27 #include "map.h"
  28 #include "content_sao.h"
  29 #include "nodedef.h"
  30 #include "voxelalgorithms.h"
  31 //#include "profiler.h" // For TimeTaker
  32 #include "settings.h" // For g_settings
  33 #include "emerge.h"
  34 #include "dungeongen.h"
  35 #include "cavegen.h"
  36 #include "mg_biome.h"
  37 #include "mg_ore.h"
  38 #include "mg_decoration.h"
  39 #include "mapgen_v5.h"
  40
  41
  42 FlagDesc flagdesc_mapgen_v5[] = {
  43         {"caverns", MGV5_CAVERNS},
  44         {NULL,      0}
  45 };
  46
  47
  48 MapgenV5::MapgenV5(MapgenV5Params *params, EmergeManager *emerge)
  49         : MapgenBasic(MAPGEN_V5, params, emerge)
  50 {
  51         spflags            = params->spflags;
  52         cave_width         = params->cave_width;
  53         large_cave_depth   = params->large_cave_depth;
  54         small_cave_num_min = params->small_cave_num_min;
  55         small_cave_num_max = params->small_cave_num_max;
  56         large_cave_num_min = params->large_cave_num_min;
  57         large_cave_num_max = params->large_cave_num_max;
  58         large_cave_flooded = params->large_cave_flooded;
  59         cavern_limit       = params->cavern_limit;
  60         cavern_taper       = params->cavern_taper;
  61         cavern_threshold   = params->cavern_threshold;
  62         dungeon_ymin       = params->dungeon_ymin;
  63         dungeon_ymax       = params->dungeon_ymax;
  64
  65         // Terrain noise
  66         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  67         noise_factor       = new Noise(&params->np_factor,       seed, csize.X, csize.Z);
  68         noise_height       = new Noise(&params->np_height,       seed, csize.X, csize.Z);
  69
  70         // 3D terrain noise
  71         // 1-up 1-down overgeneration
  72         noise_ground = new Noise(&params->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  73         // 1 down overgeneration
  74         MapgenBasic::np_cave1    = params->np_cave1;
  75         MapgenBasic::np_cave2    = params->np_cave2;
  76         MapgenBasic::np_cavern   = params->np_cavern;
  77         MapgenBasic::np_dungeons = params->np_dungeons;
  78 }
  79
  80
  81 MapgenV5::~MapgenV5()
  82 {
  83         delete noise_filler_depth;
  84         delete noise_factor;
  85         delete noise_height;
  86         delete noise_ground;
  87 }
  88
  89
  90 MapgenV5Params::MapgenV5Params():
  91         np_filler_depth (0,   1,   v3f(150, 150, 150), 261,    4, 0.7,  2.0),
  92         np_factor       (0,   1,   v3f(250, 250, 250), 920381, 3, 0.45, 2.0),
  93         np_height       (0,   10,  v3f(250, 250, 250), 84174,  4, 0.5,  2.0),
  94         np_ground       (0,   40,  v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED),
  95         np_cave1        (0,   12,  v3f(61,  61,  61),  52534,  3, 0.5,  2.0),
  96         np_cave2        (0,   12,  v3f(67,  67,  67),  10325,  3, 0.5,  2.0),
  97         np_cavern       (0,   1,   v3f(384, 128, 384), 723,    5, 0.63, 2.0),
  98         np_dungeons     (0.9, 0.5, v3f(500, 500, 500), 0,      2, 0.8,  2.0)
  99 {
 100 }
 101
 102
 103 void MapgenV5Params::readParams(const Settings *settings)
 104 {
 105         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 106         settings->getFloatNoEx("mgv5_cave_width",         cave_width);
 107         settings->getS16NoEx("mgv5_large_cave_depth",     large_cave_depth);
 108         settings->getU16NoEx("mgv5_small_cave_num_min",   small_cave_num_min);
 109         settings->getU16NoEx("mgv5_small_cave_num_max",   small_cave_num_max);
 110         settings->getU16NoEx("mgv5_large_cave_num_min",   large_cave_num_min);
 111         settings->getU16NoEx("mgv5_large_cave_num_max",   large_cave_num_max);
 112         settings->getFloatNoEx("mgv5_large_cave_flooded", large_cave_flooded);
 113         settings->getS16NoEx("mgv5_cavern_limit",         cavern_limit);
 114         settings->getS16NoEx("mgv5_cavern_taper",         cavern_taper);
 115         settings->getFloatNoEx("mgv5_cavern_threshold",   cavern_threshold);
 116         settings->getS16NoEx("mgv5_dungeon_ymin",         dungeon_ymin);
 117         settings->getS16NoEx("mgv5_dungeon_ymax",         dungeon_ymax);
 118
 119         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 120         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 121         settings->getNoiseParams("mgv5_np_height",       np_height);
 122         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 123         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 124         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 125         settings->getNoiseParams("mgv5_np_cavern",       np_cavern);
 126         settings->getNoiseParams("mgv5_np_dungeons",     np_dungeons);
 127 }
 128
 129
 130 void MapgenV5Params::writeParams(Settings *settings) const
 131 {
 132         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5, U32_MAX);
 133         settings->setFloat("mgv5_cave_width",         cave_width);
 134         settings->setS16("mgv5_large_cave_depth",     large_cave_depth);
 135         settings->setU16("mgv5_small_cave_num_min",   small_cave_num_min);
 136         settings->setU16("mgv5_small_cave_num_max",   small_cave_num_max);
 137         settings->setU16("mgv5_large_cave_num_min",   large_cave_num_min);
 138         settings->setU16("mgv5_large_cave_num_max",   large_cave_num_max);
 139         settings->setFloat("mgv5_large_cave_flooded", large_cave_flooded);
 140         settings->setS16("mgv5_cavern_limit",         cavern_limit);
 141         settings->setS16("mgv5_cavern_taper",         cavern_taper);
 142         settings->setFloat("mgv5_cavern_threshold",   cavern_threshold);
 143         settings->setS16("mgv5_dungeon_ymin",         dungeon_ymin);
 144         settings->setS16("mgv5_dungeon_ymax",         dungeon_ymax);
 145
 146         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 147         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 148         settings->setNoiseParams("mgv5_np_height",       np_height);
 149         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 150         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 151         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 152         settings->setNoiseParams("mgv5_np_cavern",       np_cavern);
 153         settings->setNoiseParams("mgv5_np_dungeons",     np_dungeons);
 154 }
 155
 156
 157 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 158 {
 159
 160         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 161         if (f < 0.01)
 162                 f = 0.01;
 163         else if (f >= 1.0)
 164                 f *= 1.6;
 165         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 166
 167         // noise_height 'offset' is the average level of terrain. At least 50% of
 168         // terrain will be below this.
 169         // Raising the maximum spawn level above 'water_level + 16' is necessary
 170         // for when noise_height 'offset' is set much higher than water_level.
 171         s16 max_spawn_y = MYMAX(noise_height->np.offset, water_level + 16);
 172
 173         // Starting spawn search at max_spawn_y + 128 ensures 128 nodes of open
 174         // space above spawn position. Avoids spawning in possibly sealed voids.
 175         for (s16 y = max_spawn_y + 128; y >= water_level; y--) {
 176                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 177
 178                 if (n_ground * f > y - h) {  // If solid
 179                         if (y < water_level || y > max_spawn_y)
 180                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 181
 182                         // y + 2 because y is surface and due to biome 'dust' nodes.
 183                         return y + 2;
 184                 }
 185         }
 186         // Unsuitable spawn position, no ground found
 187         return MAX_MAP_GENERATION_LIMIT;
 188 }
 189
 190
 191 void MapgenV5::makeChunk(BlockMakeData *data)
 192 {
 193         // Pre-conditions
 194         assert(data->vmanip);
 195         assert(data->nodedef);
 196         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 197                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 198                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 199         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 200                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 201                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 202
 203         this->generating = true;
 204         this->vm   = data->vmanip;
 205         this->ndef = data->nodedef;
 206         //TimeTaker t("makeChunk");
 207
 208         v3s16 blockpos_min = data->blockpos_min;
 209         v3s16 blockpos_max = data->blockpos_max;
 210         node_min = blockpos_min * MAP_BLOCKSIZE;
 211         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 212         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 213         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 214
 215         // Create a block-specific seed
 216         blockseed = getBlockSeed2(full_node_min, seed);
 217
 218         // Generate base terrain
 219         s16 stone_surface_max_y = generateBaseTerrain();
 220
 221         // Create heightmap
 222         updateHeightmap(node_min, node_max);
 223
 224         // Init biome generator, place biome-specific nodes, and build biomemap
 225         if (flags & MG_BIOMES) {
 226                 biomegen->calcBiomeNoise(node_min);
 227                 generateBiomes();
 228         }
 229
 230         // Generate tunnels, caverns and large randomwalk caves
 231         if (flags & MG_CAVES) {
 232                 // Generate tunnels first as caverns confuse them
 233                 generateCavesNoiseIntersection(stone_surface_max_y);
 234
 235                 // Generate caverns
 236                 bool near_cavern = false;
 237                 if (spflags & MGV5_CAVERNS)
 238                         near_cavern = generateCavernsNoise(stone_surface_max_y);
 239
 240                 // Generate large randomwalk caves
 241                 if (near_cavern)
 242                         // Disable large randomwalk caves in this mapchunk by setting
 243                         // 'large cave depth' to world base. Avoids excessive liquid in
 244                         // large caverns and floating blobs of overgenerated liquid.
 245                         generateCavesRandomWalk(stone_surface_max_y,
 246                                 -MAX_MAP_GENERATION_LIMIT);
 247                 else
 248                         generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
 249         }
 250
 251         // Generate the registered ores
 252         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 253
 254         // Generate dungeons and desert temples
 255         if (flags & MG_DUNGEONS)
 256                 generateDungeons(stone_surface_max_y);
 257
 258         // Generate the registered decorations
 259         if (flags & MG_DECORATIONS)
 260                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 261
 262         // Sprinkle some dust on top after everything else was generated
 263         if (flags & MG_BIOMES)
 264                 dustTopNodes();
 265
 266         //printf("makeChunk: %dms\n", t.stop());
 267
 268         // Add top and bottom side of water to transforming_liquid queue
 269         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 270
 271         // Calculate lighting
 272         if (flags & MG_LIGHT) {
 273                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 274                         full_node_min, full_node_max);
 275         }
 276
 277         this->generating = false;
 278 }
 279
 280
 281 int MapgenV5::generateBaseTerrain()
 282 {
 283         u32 index = 0;
 284         u32 index2d = 0;
 285         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 286
 287         noise_factor->perlinMap2D(node_min.X, node_min.Z);
 288         noise_height->perlinMap2D(node_min.X, node_min.Z);
 289         noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 290
 291         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 292                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 293                         u32 vi = vm->m_area.index(node_min.X, y, z);
 294                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 295                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 296                                         continue;
 297
 298                                 float f = 0.55 + noise_factor->result[index2d];
 299                                 if (f < 0.01)
 300                                         f = 0.01;
 301                                 else if (f >= 1.0)
 302                                         f *= 1.6;
 303                                 float h = noise_height->result[index2d];
 304
 305                                 if (noise_ground->result[index] * f < y - h) {
 306                                         if (y <= water_level)
 307                                                 vm->m_data[vi] = MapNode(c_water_source);
 308                                         else
 309                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 310                                 } else {
 311                                         vm->m_data[vi] = MapNode(c_stone);
 312                                         if (y > stone_surface_max_y)
 313                                                 stone_surface_max_y = y;
 314                                 }
 315                         }
 316                         index2d -= ystride;
 317                 }
 318                 index2d += ystride;
 319         }
 320
 321         return stone_surface_max_y;
 322 }