src/mapgen_v5.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2014-2017 paramat
   4 Copyright (C) 2014-2016 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         this->spflags          = params->spflags;
  52         this->cave_width       = params->cave_width;
  53         this->large_cave_depth = params->large_cave_depth;
  54         this->cavern_limit     = params->cavern_limit;
  55         this->cavern_taper     = params->cavern_taper;
  56         this->cavern_threshold = params->cavern_threshold;
  57
  58         // Terrain noise
  59         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  60         noise_factor       = new Noise(&params->np_factor,       seed, csize.X, csize.Z);
  61         noise_height       = new Noise(&params->np_height,       seed, csize.X, csize.Z);
  62
  63         // 3D terrain noise
  64         // 1-up 1-down overgeneration
  65         noise_ground = new Noise(&params->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  66         // 1 down overgeneration
  67         MapgenBasic::np_cave1  = params->np_cave1;
  68         MapgenBasic::np_cave2  = params->np_cave2;
  69         MapgenBasic::np_cavern = params->np_cavern;
  70 }
  71
  72
  73 MapgenV5::~MapgenV5()
  74 {
  75         delete noise_filler_depth;
  76         delete noise_factor;
  77         delete noise_height;
  78         delete noise_ground;
  79 }
  80
  81
  82 MapgenV5Params::MapgenV5Params()
  83 {
  84         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7,  2.0);
  85         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45, 2.0);
  86         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5,  2.0);
  87         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED);
  88         np_cave1        = NoiseParams(0, 12, v3f(50,  50,  50),  52534,  4, 0.5,  2.0);
  89         np_cave2        = NoiseParams(0, 12, v3f(50,  50,  50),  10325,  4, 0.5,  2.0);
  90         np_cavern       = NoiseParams(0, 1,  v3f(384, 128, 384), 723,    5, 0.63, 2.0);
  91 }
  92
  93
  94 void MapgenV5Params::readParams(const Settings *settings)
  95 {
  96         settings->getFlagStrNoEx("mgv5_spflags",        spflags, flagdesc_mapgen_v5);
  97         settings->getFloatNoEx("mgv5_cave_width",       cave_width);
  98         settings->getS16NoEx("mgv5_large_cave_depth",   large_cave_depth);
  99         settings->getS16NoEx("mgv5_cavern_limit",       cavern_limit);
 100         settings->getS16NoEx("mgv5_cavern_taper",       cavern_taper);
 101         settings->getFloatNoEx("mgv5_cavern_threshold", cavern_threshold);
 102
 103         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 104         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 105         settings->getNoiseParams("mgv5_np_height",       np_height);
 106         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 107         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 108         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 109         settings->getNoiseParams("mgv5_np_cavern",       np_cavern);
 110 }
 111
 112
 113 void MapgenV5Params::writeParams(Settings *settings) const
 114 {
 115         settings->setFlagStr("mgv5_spflags",        spflags, flagdesc_mapgen_v5, U32_MAX);
 116         settings->setFloat("mgv5_cave_width",       cave_width);
 117         settings->setS16("mgv5_large_cave_depth",   large_cave_depth);
 118         settings->setS16("mgv5_cavern_limit",       cavern_limit);
 119         settings->setS16("mgv5_cavern_taper",       cavern_taper);
 120         settings->setFloat("mgv5_cavern_threshold", cavern_threshold);
 121
 122         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 123         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 124         settings->setNoiseParams("mgv5_np_height",       np_height);
 125         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 126         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 127         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 128         settings->setNoiseParams("mgv5_np_cavern",       np_cavern);
 129 }
 130
 131
 132 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 133 {
 134         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 135
 136         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 137         if (f < 0.01)
 138                 f = 0.01;
 139         else if (f >= 1.0)
 140                 f *= 1.6;
 141         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 142
 143         for (s16 y = 128; y >= -128; y--) {
 144                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 145
 146                 if (n_ground * f > y - h) {  // If solid
 147                         // If either top 2 nodes of search are solid this is inside a
 148                         // mountain or floatland with possibly no space for the player to spawn.
 149                         if (y >= 127) {
 150                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 151                         } else {  // Ground below at least 2 nodes of empty space
 152                                 if (y <= water_level || y > water_level + 16)
 153                                         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 154                                 else
 155                                         return y;
 156                         }
 157                 }
 158         }
 159
 160         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 161         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn position, no ground found
 162 }
 163
 164
 165 void MapgenV5::makeChunk(BlockMakeData *data)
 166 {
 167         // Pre-conditions
 168         assert(data->vmanip);
 169         assert(data->nodedef);
 170         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 171                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 172                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 173         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 174                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 175                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 176
 177         this->generating = true;
 178         this->vm   = data->vmanip;
 179         this->ndef = data->nodedef;
 180         //TimeTaker t("makeChunk");
 181
 182         v3s16 blockpos_min = data->blockpos_min;
 183         v3s16 blockpos_max = data->blockpos_max;
 184         node_min = blockpos_min * MAP_BLOCKSIZE;
 185         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 186         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 187         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 188
 189         // Create a block-specific seed
 190         blockseed = getBlockSeed2(full_node_min, seed);
 191
 192         // Generate base terrain
 193         s16 stone_surface_max_y = generateBaseTerrain();
 194
 195         // Create heightmap
 196         updateHeightmap(node_min, node_max);
 197
 198         // Init biome generator, place biome-specific nodes, and build biomemap
 199         biomegen->calcBiomeNoise(node_min);
 200         MgStoneType stone_type = generateBiomes();
 201
 202         // Generate caverns, tunnels and classic caves
 203         if (flags & MG_CAVES) {
 204                 bool near_cavern = false;
 205                 // Generate caverns
 206                 if (spflags & MGV5_CAVERNS)
 207                         near_cavern = generateCaverns(stone_surface_max_y);
 208                 // Generate tunnels and classic caves
 209                 if (near_cavern)
 210                         // Disable classic caves in this mapchunk by setting
 211                         // 'large cave depth' to world base. Avoids excessive liquid in
 212                         // large caverns and floating blobs of overgenerated liquid.
 213                         generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
 214                 else
 215                         generateCaves(stone_surface_max_y, large_cave_depth);
 216         }
 217
 218         // Generate dungeons and desert temples
 219         if (flags & MG_DUNGEONS)
 220                 generateDungeons(stone_surface_max_y, stone_type);
 221
 222         // Generate the registered decorations
 223         if (flags & MG_DECORATIONS)
 224                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 225
 226         // Generate the registered ores
 227         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 228
 229         // Sprinkle some dust on top after everything else was generated
 230         dustTopNodes();
 231
 232         //printf("makeChunk: %dms\n", t.stop());
 233
 234         // Add top and bottom side of water to transforming_liquid queue
 235         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 236
 237         // Calculate lighting
 238         if (flags & MG_LIGHT) {
 239                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 240                         full_node_min, full_node_max);
 241         }
 242
 243         this->generating = false;
 244 }
 245
 246
 247 int MapgenV5::generateBaseTerrain()
 248 {
 249         u32 index = 0;
 250         u32 index2d = 0;
 251         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 252
 253         noise_factor->perlinMap2D(node_min.X, node_min.Z);
 254         noise_height->perlinMap2D(node_min.X, node_min.Z);
 255         noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 256
 257         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 258                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 259                         u32 vi = vm->m_area.index(node_min.X, y, z);
 260                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 261                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 262                                         continue;
 263
 264                                 float f = 0.55 + noise_factor->result[index2d];
 265                                 if (f < 0.01)
 266                                         f = 0.01;
 267                                 else if (f >= 1.0)
 268                                         f *= 1.6;
 269                                 float h = noise_height->result[index2d];
 270
 271                                 if (noise_ground->result[index] * f < y - h) {
 272                                         if (y <= water_level)
 273                                                 vm->m_data[vi] = MapNode(c_water_source);
 274                                         else
 275                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 276                                 } else {
 277                                         vm->m_data[vi] = MapNode(c_stone);
 278                                         if (y > stone_surface_max_y)
 279                                                 stone_surface_max_y = y;
 280                                 }
 281                         }
 282                         index2d -= ystride;
 283                 }
 284                 index2d += ystride;
 285         }
 286
 287         return stone_surface_max_y;
 288 }