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 "nodedef.h"
  29 #include "voxelalgorithms.h"
  30 //#include "profiler.h" // For TimeTaker
  31 #include "settings.h" // For g_settings
  32 #include "emerge.h"
  33 #include "dungeongen.h"
  34 #include "cavegen.h"
  35 #include "mg_biome.h"
  36 #include "mg_ore.h"
  37 #include "mg_decoration.h"
  38 #include "mapgen_v5.h"
  39
  40
  41 FlagDesc flagdesc_mapgen_v5[] = {
  42         {"caverns", MGV5_CAVERNS},
  43         {NULL,      0}
  44 };
  45
  46
  47 MapgenV5::MapgenV5(MapgenV5Params *params, EmergeParams *emerge)
  48         : MapgenBasic(MAPGEN_V5, params, emerge)
  49 {
  50         spflags            = params->spflags;
  51         cave_width         = params->cave_width;
  52         large_cave_depth   = params->large_cave_depth;
  53         small_cave_num_min = params->small_cave_num_min;
  54         small_cave_num_max = params->small_cave_num_max;
  55         large_cave_num_min = params->large_cave_num_min;
  56         large_cave_num_max = params->large_cave_num_max;
  57         large_cave_flooded = params->large_cave_flooded;
  58         cavern_limit       = params->cavern_limit;
  59         cavern_taper       = params->cavern_taper;
  60         cavern_threshold   = params->cavern_threshold;
  61         dungeon_ymin       = params->dungeon_ymin;
  62         dungeon_ymax       = params->dungeon_ymax;
  63
  64         // Terrain noise
  65         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  66         noise_factor       = new Noise(&params->np_factor,       seed, csize.X, csize.Z);
  67         noise_height       = new Noise(&params->np_height,       seed, csize.X, csize.Z);
  68
  69         // 3D terrain noise
  70         // 1-up 1-down overgeneration
  71         noise_ground = new Noise(&params->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  72         // 1 down overgeneration
  73         MapgenBasic::np_cave1    = params->np_cave1;
  74         MapgenBasic::np_cave2    = params->np_cave2;
  75         MapgenBasic::np_cavern   = params->np_cavern;
  76         MapgenBasic::np_dungeons = params->np_dungeons;
  77 }
  78
  79
  80 MapgenV5::~MapgenV5()
  81 {
  82         delete noise_filler_depth;
  83         delete noise_factor;
  84         delete noise_height;
  85         delete noise_ground;
  86 }
  87
  88
  89 MapgenV5Params::MapgenV5Params():
  90         np_filler_depth (0,   1,   v3f(150, 150, 150), 261,    4, 0.7,  2.0),
  91         np_factor       (0,   1,   v3f(250, 250, 250), 920381, 3, 0.45, 2.0),
  92         np_height       (0,   10,  v3f(250, 250, 250), 84174,  4, 0.5,  2.0),
  93         np_ground       (0,   40,  v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED),
  94         np_cave1        (0,   12,  v3f(61,  61,  61),  52534,  3, 0.5,  2.0),
  95         np_cave2        (0,   12,  v3f(67,  67,  67),  10325,  3, 0.5,  2.0),
  96         np_cavern       (0,   1,   v3f(384, 128, 384), 723,    5, 0.63, 2.0),
  97         np_dungeons     (0.9, 0.5, v3f(500, 500, 500), 0,      2, 0.8,  2.0)
  98 {
  99 }
 100
 101
 102 void MapgenV5Params::readParams(const Settings *settings)
 103 {
 104         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 105         settings->getFloatNoEx("mgv5_cave_width",         cave_width);
 106         settings->getS16NoEx("mgv5_large_cave_depth",     large_cave_depth);
 107         settings->getU16NoEx("mgv5_small_cave_num_min",   small_cave_num_min);
 108         settings->getU16NoEx("mgv5_small_cave_num_max",   small_cave_num_max);
 109         settings->getU16NoEx("mgv5_large_cave_num_min",   large_cave_num_min);
 110         settings->getU16NoEx("mgv5_large_cave_num_max",   large_cave_num_max);
 111         settings->getFloatNoEx("mgv5_large_cave_flooded", large_cave_flooded);
 112         settings->getS16NoEx("mgv5_cavern_limit",         cavern_limit);
 113         settings->getS16NoEx("mgv5_cavern_taper",         cavern_taper);
 114         settings->getFloatNoEx("mgv5_cavern_threshold",   cavern_threshold);
 115         settings->getS16NoEx("mgv5_dungeon_ymin",         dungeon_ymin);
 116         settings->getS16NoEx("mgv5_dungeon_ymax",         dungeon_ymax);
 117
 118         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 119         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 120         settings->getNoiseParams("mgv5_np_height",       np_height);
 121         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 122         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 123         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 124         settings->getNoiseParams("mgv5_np_cavern",       np_cavern);
 125         settings->getNoiseParams("mgv5_np_dungeons",     np_dungeons);
 126 }
 127
 128
 129 void MapgenV5Params::writeParams(Settings *settings) const
 130 {
 131         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 132         settings->setFloat("mgv5_cave_width",         cave_width);
 133         settings->setS16("mgv5_large_cave_depth",     large_cave_depth);
 134         settings->setU16("mgv5_small_cave_num_min",   small_cave_num_min);
 135         settings->setU16("mgv5_small_cave_num_max",   small_cave_num_max);
 136         settings->setU16("mgv5_large_cave_num_min",   large_cave_num_min);
 137         settings->setU16("mgv5_large_cave_num_max",   large_cave_num_max);
 138         settings->setFloat("mgv5_large_cave_flooded", large_cave_flooded);
 139         settings->setS16("mgv5_cavern_limit",         cavern_limit);
 140         settings->setS16("mgv5_cavern_taper",         cavern_taper);
 141         settings->setFloat("mgv5_cavern_threshold",   cavern_threshold);
 142         settings->setS16("mgv5_dungeon_ymin",         dungeon_ymin);
 143         settings->setS16("mgv5_dungeon_ymax",         dungeon_ymax);
 144
 145         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 146         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 147         settings->setNoiseParams("mgv5_np_height",       np_height);
 148         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 149         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 150         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 151         settings->setNoiseParams("mgv5_np_cavern",       np_cavern);
 152         settings->setNoiseParams("mgv5_np_dungeons",     np_dungeons);
 153 }
 154
 155
 156 void MapgenV5Params::setDefaultSettings(Settings *settings)
 157 {
 158         settings->setDefault("mgv5_spflags", flagdesc_mapgen_v5, MGV5_CAVERNS);
 159 }
 160
 161
 162 /////////////////////////////////////////////////////////////////
 163
 164
 165 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 166 {
 167
 168         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 169         if (f < 0.01)
 170                 f = 0.01;
 171         else if (f >= 1.0)
 172                 f *= 1.6;
 173         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 174
 175         // noise_height 'offset' is the average level of terrain. At least 50% of
 176         // terrain will be below this.
 177         // Raising the maximum spawn level above 'water_level + 16' is necessary
 178         // for when noise_height 'offset' is set much higher than water_level.
 179         s16 max_spawn_y = MYMAX(noise_height->np.offset, water_level + 16);
 180
 181         // Starting spawn search at max_spawn_y + 128 ensures 128 nodes of open
 182         // space above spawn position. Avoids spawning in possibly sealed voids.
 183         for (s16 y = max_spawn_y + 128; y >= water_level; y--) {
 184                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 185
 186                 if (n_ground * f > y - h) {  // If solid
 187                         if (y < water_level || y > max_spawn_y)
 188                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 189
 190                         // y + 2 because y is surface and due to biome 'dust' nodes.
 191                         return y + 2;
 192                 }
 193         }
 194         // Unsuitable spawn position, no ground found
 195         return MAX_MAP_GENERATION_LIMIT;
 196 }
 197
 198
 199 void MapgenV5::makeChunk(BlockMakeData *data)
 200 {
 201         // Pre-conditions
 202         assert(data->vmanip);
 203         assert(data->nodedef);
 204
 205         this->generating = true;
 206         this->vm   = data->vmanip;
 207         this->ndef = data->nodedef;
 208         //TimeTaker t("makeChunk");
 209
 210         v3s16 blockpos_min = data->blockpos_min;
 211         v3s16 blockpos_max = data->blockpos_max;
 212         node_min = blockpos_min * MAP_BLOCKSIZE;
 213         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 214         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 215         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 216
 217         // Create a block-specific seed
 218         blockseed = getBlockSeed2(full_node_min, seed);
 219
 220         // Generate base terrain
 221         s16 stone_surface_max_y = generateBaseTerrain();
 222
 223         // Create heightmap
 224         updateHeightmap(node_min, node_max);
 225
 226         // Init biome generator, place biome-specific nodes, and build biomemap
 227         if (flags & MG_BIOMES) {
 228                 biomegen->calcBiomeNoise(node_min);
 229                 generateBiomes();
 230         }
 231
 232         // Generate tunnels, caverns and large randomwalk caves
 233         if (flags & MG_CAVES) {
 234                 // Generate tunnels first as caverns confuse them
 235                 generateCavesNoiseIntersection(stone_surface_max_y);
 236
 237                 // Generate caverns
 238                 bool near_cavern = false;
 239                 if (spflags & MGV5_CAVERNS)
 240                         near_cavern = generateCavernsNoise(stone_surface_max_y);
 241
 242                 // Generate large randomwalk caves
 243                 if (near_cavern)
 244                         // Disable large randomwalk caves in this mapchunk by setting
 245                         // 'large cave depth' to world base. Avoids excessive liquid in
 246                         // large caverns and floating blobs of overgenerated liquid.
 247                         generateCavesRandomWalk(stone_surface_max_y,
 248                                 -MAX_MAP_GENERATION_LIMIT);
 249                 else
 250                         generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
 251         }
 252
 253         // Generate the registered ores
 254         if (flags & MG_ORES)
 255                 m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 256
 257         // Generate dungeons and desert temples
 258         if (flags & MG_DUNGEONS)
 259                 generateDungeons(stone_surface_max_y);
 260
 261         // Generate the registered decorations
 262         if (flags & MG_DECORATIONS)
 263                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 264
 265         // Sprinkle some dust on top after everything else was generated
 266         if (flags & MG_BIOMES)
 267                 dustTopNodes();
 268
 269         //printf("makeChunk: %dms\n", t.stop());
 270
 271         // Add top and bottom side of water to transforming_liquid queue
 272         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 273
 274         // Calculate lighting
 275         if (flags & MG_LIGHT) {
 276                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 277                         full_node_min, full_node_max);
 278         }
 279
 280         this->generating = false;
 281 }
 282
 283
 284 int MapgenV5::generateBaseTerrain()
 285 {
 286         u32 index = 0;
 287         u32 index2d = 0;
 288         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 289
 290         noise_factor->perlinMap2D(node_min.X, node_min.Z);
 291         noise_height->perlinMap2D(node_min.X, node_min.Z);
 292         noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 293
 294         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 295                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 296                         u32 vi = vm->m_area.index(node_min.X, y, z);
 297                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 298                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 299                                         continue;
 300
 301                                 float f = 0.55 + noise_factor->result[index2d];
 302                                 if (f < 0.01)
 303                                         f = 0.01;
 304                                 else if (f >= 1.0)
 305                                         f *= 1.6;
 306                                 float h = noise_height->result[index2d];
 307
 308                                 if (noise_ground->result[index] * f < y - h) {
 309                                         if (y <= water_level)
 310                                                 vm->m_data[vi] = MapNode(c_water_source);
 311                                         else
 312                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 313                                 } else {
 314                                         vm->m_data[vi] = MapNode(c_stone);
 315                                         if (y > stone_surface_max_y)
 316                                                 stone_surface_max_y = y;
 317                                 }
 318                         }
 319                         index2d -= ystride;
 320                 }
 321                 index2d += ystride;
 322         }
 323
 324         return stone_surface_max_y;
 325 }