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->cavern_limit     = params->cavern_limit;
  54         this->cavern_taper     = params->cavern_taper;
  55         this->cavern_threshold = params->cavern_threshold;
  56
  57         // Terrain noise
  58         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  59         noise_factor       = new Noise(&params->np_factor,       seed, csize.X, csize.Z);
  60         noise_height       = new Noise(&params->np_height,       seed, csize.X, csize.Z);
  61
  62         // 3D terrain noise
  63         // 1-up 1-down overgeneration
  64         noise_ground = new Noise(&params->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  65         // 1 down overgeneration
  66         MapgenBasic::np_cave1  = params->np_cave1;
  67         MapgenBasic::np_cave2  = params->np_cave2;
  68         MapgenBasic::np_cavern = params->np_cavern;
  69 }
  70
  71
  72 MapgenV5::~MapgenV5()
  73 {
  74         delete noise_filler_depth;
  75         delete noise_factor;
  76         delete noise_height;
  77         delete noise_ground;
  78 }
  79
  80
  81 MapgenV5Params::MapgenV5Params()
  82 {
  83         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7,  2.0);
  84         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45, 2.0);
  85         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5,  2.0);
  86         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED);
  87         np_cave1        = NoiseParams(0, 12, v3f(50,  50,  50),  52534,  4, 0.5,  2.0);
  88         np_cave2        = NoiseParams(0, 12, v3f(50,  50,  50),  10325,  4, 0.5,  2.0);
  89         np_cavern       = NoiseParams(0, 1,  v3f(384, 128, 384), 723,    5, 0.63, 2.0);
  90 }
  91
  92
  93 void MapgenV5Params::readParams(const Settings *settings)
  94 {
  95         settings->getFlagStrNoEx("mgv5_spflags",        spflags, flagdesc_mapgen_v5);
  96         settings->getFloatNoEx("mgv5_cave_width",       cave_width);
  97         settings->getS16NoEx("mgv5_cavern_limit",       cavern_limit);
  98         settings->getS16NoEx("mgv5_cavern_taper",       cavern_taper);
  99         settings->getFloatNoEx("mgv5_cavern_threshold", cavern_threshold);
 100
 101         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 102         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 103         settings->getNoiseParams("mgv5_np_height",       np_height);
 104         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 105         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 106         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 107         settings->getNoiseParams("mgv5_np_cavern",       np_cavern);
 108 }
 109
 110
 111 void MapgenV5Params::writeParams(Settings *settings) const
 112 {
 113         settings->setFlagStr("mgv5_spflags",        spflags, flagdesc_mapgen_v5, U32_MAX);
 114         settings->setFloat("mgv5_cave_width",       cave_width);
 115         settings->setS16("mgv5_cavern_limit",       cavern_limit);
 116         settings->setS16("mgv5_cavern_taper",       cavern_taper);
 117         settings->setFloat("mgv5_cavern_threshold", cavern_threshold);
 118
 119         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 120         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 121         settings->setNoiseParams("mgv5_np_height",       np_height);
 122         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 123         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 124         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 125         settings->setNoiseParams("mgv5_np_cavern",       np_cavern);
 126 }
 127
 128
 129 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 130 {
 131         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 132
 133         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 134         if (f < 0.01)
 135                 f = 0.01;
 136         else if (f >= 1.0)
 137                 f *= 1.6;
 138         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 139
 140         for (s16 y = 128; y >= -128; y--) {
 141                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 142
 143                 if (n_ground * f > y - h) {  // If solid
 144                         // If either top 2 nodes of search are solid this is inside a
 145                         // mountain or floatland with possibly no space for the player to spawn.
 146                         if (y >= 127) {
 147                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 148                         } else {  // Ground below at least 2 nodes of empty space
 149                                 if (y <= water_level || y > water_level + 16)
 150                                         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 151                                 else
 152                                         return y;
 153                         }
 154                 }
 155         }
 156
 157         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 158         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn position, no ground found
 159 }
 160
 161
 162 void MapgenV5::makeChunk(BlockMakeData *data)
 163 {
 164         // Pre-conditions
 165         assert(data->vmanip);
 166         assert(data->nodedef);
 167         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 168                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 169                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 170         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 171                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 172                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 173
 174         this->generating = true;
 175         this->vm   = data->vmanip;
 176         this->ndef = data->nodedef;
 177         //TimeTaker t("makeChunk");
 178
 179         v3s16 blockpos_min = data->blockpos_min;
 180         v3s16 blockpos_max = data->blockpos_max;
 181         node_min = blockpos_min * MAP_BLOCKSIZE;
 182         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 183         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 184         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 185
 186         // Create a block-specific seed
 187         blockseed = getBlockSeed2(full_node_min, seed);
 188
 189         // Generate base terrain
 190         s16 stone_surface_max_y = generateBaseTerrain();
 191
 192         // Create heightmap
 193         updateHeightmap(node_min, node_max);
 194
 195         // Init biome generator, place biome-specific nodes, and build biomemap
 196         biomegen->calcBiomeNoise(node_min);
 197         MgStoneType stone_type = generateBiomes();
 198
 199         // Generate caverns, tunnels and classic caves
 200         if (flags & MG_CAVES) {
 201                 bool near_cavern = false;
 202                 // Generate caverns
 203                 if (spflags & MGV5_CAVERNS)
 204                         near_cavern = generateCaverns(stone_surface_max_y);
 205                 // Generate tunnels and classic caves
 206                 if (near_cavern)
 207                         // Disable classic caves in this mapchunk by setting
 208                         // 'large cave depth' to world base. Avoids excessive liquid in
 209                         // large caverns and floating blobs of overgenerated liquid.
 210                         generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
 211                 else
 212                         generateCaves(stone_surface_max_y, MGV5_LARGE_CAVE_DEPTH);
 213         }
 214
 215         // Generate dungeons and desert temples
 216         if (flags & MG_DUNGEONS)
 217                 generateDungeons(stone_surface_max_y, stone_type);
 218
 219         // Generate the registered decorations
 220         if (flags & MG_DECORATIONS)
 221                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 222
 223         // Generate the registered ores
 224         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 225
 226         // Sprinkle some dust on top after everything else was generated
 227         dustTopNodes();
 228
 229         //printf("makeChunk: %dms\n", t.stop());
 230
 231         // Add top and bottom side of water to transforming_liquid queue
 232         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 233
 234         // Calculate lighting
 235         if (flags & MG_LIGHT) {
 236                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 237                         full_node_min, full_node_max);
 238         }
 239
 240         this->generating = false;
 241 }
 242
 243
 244 int MapgenV5::generateBaseTerrain()
 245 {
 246         u32 index = 0;
 247         u32 index2d = 0;
 248         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 249
 250         noise_factor->perlinMap2D(node_min.X, node_min.Z);
 251         noise_height->perlinMap2D(node_min.X, node_min.Z);
 252         noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 253
 254         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 255                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 256                         u32 vi = vm->m_area.index(node_min.X, y, z);
 257                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 258                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 259                                         continue;
 260
 261                                 float f = 0.55 + noise_factor->result[index2d];
 262                                 if (f < 0.01)
 263                                         f = 0.01;
 264                                 else if (f >= 1.0)
 265                                         f *= 1.6;
 266                                 float h = noise_height->result[index2d];
 267
 268                                 if (noise_ground->result[index] * f < y - h) {
 269                                         if (y <= water_level)
 270                                                 vm->m_data[vi] = MapNode(c_water_source);
 271                                         else
 272                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 273                                 } else {
 274                                         vm->m_data[vi] = MapNode(c_stone);
 275                                         if (y > stone_surface_max_y)
 276                                                 stone_surface_max_y = y;
 277                                 }
 278                         }
 279                         index2d -= ystride;
 280                 }
 281                 index2d += ystride;
 282         }
 283
 284         return stone_surface_max_y;
 285 }