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