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(int mapgenid, MapgenV5Params *params, EmergeManager *emerge)
  49         : MapgenBasic(mapgenid, params, emerge)
  50 {
  51         spflags          = params->spflags;
  52         cave_width       = params->cave_width;
  53         large_cave_depth = params->large_cave_depth;
  54         lava_depth       = params->lava_depth;
  55         cavern_limit     = params->cavern_limit;
  56         cavern_taper     = params->cavern_taper;
  57         cavern_threshold = params->cavern_threshold;
  58         dungeon_ymin     = params->dungeon_ymin;
  59         dungeon_ymax     = params->dungeon_ymax;
  60
  61         // Terrain noise
  62         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  63         noise_factor       = new Noise(&params->np_factor,       seed, csize.X, csize.Z);
  64         noise_height       = new Noise(&params->np_height,       seed, csize.X, csize.Z);
  65
  66         // 3D terrain noise
  67         // 1-up 1-down overgeneration
  68         noise_ground = new Noise(&params->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  69         // 1 down overgeneration
  70         MapgenBasic::np_cave1  = params->np_cave1;
  71         MapgenBasic::np_cave2  = params->np_cave2;
  72         MapgenBasic::np_cavern = params->np_cavern;
  73 }
  74
  75
  76 MapgenV5::~MapgenV5()
  77 {
  78         delete noise_filler_depth;
  79         delete noise_factor;
  80         delete noise_height;
  81         delete noise_ground;
  82 }
  83
  84
  85 MapgenV5Params::MapgenV5Params():
  86         np_filler_depth (0, 1,  v3f(150, 150, 150), 261,    4, 0.7,  2.0),
  87         np_factor       (0, 1,  v3f(250, 250, 250), 920381, 3, 0.45, 2.0),
  88         np_height       (0, 10, v3f(250, 250, 250), 84174,  4, 0.5,  2.0),
  89         np_ground       (0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED),
  90         np_cave1        (0, 12, v3f(61,  61,  61),  52534,  3, 0.5,  2.0),
  91         np_cave2        (0, 12, v3f(67,  67,  67),  10325,  3, 0.5,  2.0),
  92         np_cavern       (0, 1,  v3f(384, 128, 384), 723,    5, 0.63, 2.0)
  93 {
  94 }
  95
  96
  97 void MapgenV5Params::readParams(const Settings *settings)
  98 {
  99         settings->getFlagStrNoEx("mgv5_spflags",        spflags, flagdesc_mapgen_v5);
 100         settings->getFloatNoEx("mgv5_cave_width",       cave_width);
 101         settings->getS16NoEx("mgv5_large_cave_depth",   large_cave_depth);
 102         settings->getS16NoEx("mgv5_lava_depth",         lava_depth);
 103         settings->getS16NoEx("mgv5_cavern_limit",       cavern_limit);
 104         settings->getS16NoEx("mgv5_cavern_taper",       cavern_taper);
 105         settings->getFloatNoEx("mgv5_cavern_threshold", cavern_threshold);
 106         settings->getS16NoEx("mgv5_dungeon_ymin",       dungeon_ymin);
 107         settings->getS16NoEx("mgv5_dungeon_ymax",       dungeon_ymax);
 108
 109         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 110         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 111         settings->getNoiseParams("mgv5_np_height",       np_height);
 112         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 113         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 114         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 115         settings->getNoiseParams("mgv5_np_cavern",       np_cavern);
 116 }
 117
 118
 119 void MapgenV5Params::writeParams(Settings *settings) const
 120 {
 121         settings->setFlagStr("mgv5_spflags",        spflags, flagdesc_mapgen_v5, U32_MAX);
 122         settings->setFloat("mgv5_cave_width",       cave_width);
 123         settings->setS16("mgv5_large_cave_depth",   large_cave_depth);
 124         settings->setS16("mgv5_lava_depth",         lava_depth);
 125         settings->setS16("mgv5_cavern_limit",       cavern_limit);
 126         settings->setS16("mgv5_cavern_taper",       cavern_taper);
 127         settings->setFloat("mgv5_cavern_threshold", cavern_threshold);
 128         settings->setS16("mgv5_dungeon_ymin",       dungeon_ymin);
 129         settings->setS16("mgv5_dungeon_ymax",       dungeon_ymax);
 130
 131         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 132         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 133         settings->setNoiseParams("mgv5_np_height",       np_height);
 134         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 135         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 136         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 137         settings->setNoiseParams("mgv5_np_cavern",       np_cavern);
 138 }
 139
 140
 141 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 142 {
 143
 144         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 145         if (f < 0.01)
 146                 f = 0.01;
 147         else if (f >= 1.0)
 148                 f *= 1.6;
 149         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 150
 151         // noise_height 'offset' is the average level of terrain. At least 50% of
 152         // terrain will be below this.
 153         // Raising the maximum spawn level above 'water_level + 16' is necessary
 154         // for when noise_height 'offset' is set much higher than water_level.
 155         s16 max_spawn_y = MYMAX(noise_height->np.offset, water_level + 16);
 156
 157         // Starting spawn search at max_spawn_y + 128 ensures 128 nodes of open
 158         // space above spawn position. Avoids spawning in possibly sealed voids.
 159         for (s16 y = max_spawn_y + 128; y >= water_level; y--) {
 160                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 161
 162                 if (n_ground * f > y - h) {  // If solid
 163                         if (y < water_level || y > max_spawn_y)
 164                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 165
 166                         // y + 2 because y is surface and due to biome 'dust' nodes.
 167                         return y + 2;
 168                 }
 169         }
 170         // Unsuitable spawn position, no ground found
 171         return MAX_MAP_GENERATION_LIMIT;
 172 }
 173
 174
 175 void MapgenV5::makeChunk(BlockMakeData *data)
 176 {
 177         // Pre-conditions
 178         assert(data->vmanip);
 179         assert(data->nodedef);
 180         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 181                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 182                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 183         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 184                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 185                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 186
 187         this->generating = true;
 188         this->vm   = data->vmanip;
 189         this->ndef = data->nodedef;
 190         //TimeTaker t("makeChunk");
 191
 192         v3s16 blockpos_min = data->blockpos_min;
 193         v3s16 blockpos_max = data->blockpos_max;
 194         node_min = blockpos_min * MAP_BLOCKSIZE;
 195         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 196         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 197         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 198
 199         // Create a block-specific seed
 200         blockseed = getBlockSeed2(full_node_min, seed);
 201
 202         // Generate base terrain
 203         s16 stone_surface_max_y = generateBaseTerrain();
 204
 205         // Create heightmap
 206         updateHeightmap(node_min, node_max);
 207
 208         // Init biome generator, place biome-specific nodes, and build biomemap
 209         if (flags & MG_BIOMES) {
 210                 biomegen->calcBiomeNoise(node_min);
 211                 generateBiomes();
 212         }
 213
 214         // Generate tunnels, caverns and large randomwalk caves
 215         if (flags & MG_CAVES) {
 216                 // Generate tunnels first as caverns confuse them
 217                 generateCavesNoiseIntersection(stone_surface_max_y);
 218
 219                 // Generate caverns
 220                 bool near_cavern = false;
 221                 if (spflags & MGV5_CAVERNS)
 222                         near_cavern = generateCavernsNoise(stone_surface_max_y);
 223
 224                 // Generate large randomwalk caves
 225                 if (near_cavern)
 226                         // Disable large randomwalk caves in this mapchunk by setting
 227                         // 'large cave depth' to world base. Avoids excessive liquid in
 228                         // large caverns and floating blobs of overgenerated liquid.
 229                         generateCavesRandomWalk(stone_surface_max_y,
 230                                 -MAX_MAP_GENERATION_LIMIT);
 231                 else
 232                         generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
 233         }
 234
 235         // Generate the registered ores
 236         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 237
 238         // Generate dungeons and desert temples
 239         if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
 240                         full_node_max.Y <= dungeon_ymax)
 241                 generateDungeons(stone_surface_max_y);
 242
 243         // Generate the registered decorations
 244         if (flags & MG_DECORATIONS)
 245                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 246
 247         // Sprinkle some dust on top after everything else was generated
 248         if (flags & MG_BIOMES)
 249                 dustTopNodes();
 250
 251         //printf("makeChunk: %dms\n", t.stop());
 252
 253         // Add top and bottom side of water to transforming_liquid queue
 254         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 255
 256         // Calculate lighting
 257         if (flags & MG_LIGHT) {
 258                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 259                         full_node_min, full_node_max);
 260         }
 261
 262         this->generating = false;
 263 }
 264
 265
 266 int MapgenV5::generateBaseTerrain()
 267 {
 268         u32 index = 0;
 269         u32 index2d = 0;
 270         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 271
 272         noise_factor->perlinMap2D(node_min.X, node_min.Z);
 273         noise_height->perlinMap2D(node_min.X, node_min.Z);
 274         noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 275
 276         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 277                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 278                         u32 vi = vm->m_area.index(node_min.X, y, z);
 279                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 280                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 281                                         continue;
 282
 283                                 float f = 0.55 + noise_factor->result[index2d];
 284                                 if (f < 0.01)
 285                                         f = 0.01;
 286                                 else if (f >= 1.0)
 287                                         f *= 1.6;
 288                                 float h = noise_height->result[index2d];
 289
 290                                 if (noise_ground->result[index] * f < y - h) {
 291                                         if (y <= water_level)
 292                                                 vm->m_data[vi] = MapNode(c_water_source);
 293                                         else
 294                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 295                                 } else {
 296                                         vm->m_data[vi] = MapNode(c_stone);
 297                                         if (y > stone_surface_max_y)
 298                                                 stone_surface_max_y = y;
 299                                 }
 300                         }
 301                         index2d -= ystride;
 302                 }
 303                 index2d += ystride;
 304         }
 305
 306         return stone_surface_max_y;
 307 }