src/mapgen_v5.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   4 Copyright (C) 2010-2015 paramat, Matt Gregory
   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 "treegen.h"
  37 #include "mg_biome.h"
  38 #include "mg_ore.h"
  39 #include "mg_decoration.h"
  40 #include "mapgen_v5.h"
  41
  42
  43 FlagDesc flagdesc_mapgen_v5[] = {
  44         {NULL,         0}
  45 };
  46
  47
  48 MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  49         : MapgenBasic(mapgenid, params, emerge)
  50 {
  51         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  52
  53         this->spflags    = sp->spflags;
  54         this->cave_width = sp->cave_width;
  55
  56         // Terrain noise
  57         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  58         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  59         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  60
  61         // 3D terrain noise
  62         // 1-up 1-down overgeneration
  63         noise_ground = new Noise(&sp->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  64
  65         MapgenBasic::np_cave1 = sp->np_cave1;
  66         MapgenBasic::np_cave2 = sp->np_cave2;
  67 }
  68
  69
  70 MapgenV5::~MapgenV5()
  71 {
  72         delete noise_filler_depth;
  73         delete noise_factor;
  74         delete noise_height;
  75         delete noise_ground;
  76 }
  77
  78
  79 MapgenV5Params::MapgenV5Params()
  80 {
  81         spflags    = 0;
  82         cave_width = 0.125;
  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_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_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED);
  90 }
  91
  92
  93 //#define CAVE_NOISE_SCALE 12.0
  94 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) = 0.125
  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
 102         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 103         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 104         settings->getNoiseParams("mgv5_np_height",       np_height);
 105         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 106         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 107         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 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
 116         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 117         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 118         settings->setNoiseParams("mgv5_np_height",       np_height);
 119         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 120         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 121         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 122 }
 123
 124
 125 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 126 {
 127         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 128
 129         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 130         if (f < 0.01)
 131                 f = 0.01;
 132         else if (f >= 1.0)
 133                 f *= 1.6;
 134         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 135
 136         for (s16 y = 128; y >= -128; y--) {
 137                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 138
 139                 if (n_ground * f > y - h) {  // If solid
 140                         // If either top 2 nodes of search are solid this is inside a
 141                         // mountain or floatland with possibly no space for the player to spawn.
 142                         if (y >= 127) {
 143                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 144                         } else {  // Ground below at least 2 nodes of empty space
 145                                 if (y <= water_level || y > water_level + 16)
 146                                         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 147                                 else
 148                                         return y;
 149                         }
 150                 }
 151         }
 152
 153         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 154         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn position, no ground found
 155 }
 156
 157
 158 void MapgenV5::makeChunk(BlockMakeData *data)
 159 {
 160         // Pre-conditions
 161         assert(data->vmanip);
 162         assert(data->nodedef);
 163         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 164                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 165                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 166         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 167                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 168                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 169
 170         this->generating = true;
 171         this->vm   = data->vmanip;
 172         this->ndef = data->nodedef;
 173         //TimeTaker t("makeChunk");
 174
 175         v3s16 blockpos_min = data->blockpos_min;
 176         v3s16 blockpos_max = data->blockpos_max;
 177         node_min = blockpos_min * MAP_BLOCKSIZE;
 178         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 179         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 180         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 181
 182         // Create a block-specific seed
 183         blockseed = getBlockSeed2(full_node_min, seed);
 184
 185         // Generate base terrain
 186         s16 stone_surface_max_y = generateBaseTerrain();
 187
 188         // Create heightmap
 189         updateHeightmap(node_min, node_max);
 190
 191         // Init biome generator, place biome-specific nodes, and build biomemap
 192         biomegen->calcBiomeNoise(node_min);
 193         MgStoneType stone_type = generateBiomes();
 194
 195         // Generate caves
 196         if ((flags & MG_CAVES) && (stone_surface_max_y >= node_min.Y))
 197                 generateCaves(stone_surface_max_y, MGV5_LARGE_CAVE_DEPTH);
 198
 199         // Generate dungeons and desert temples
 200         if (flags & MG_DUNGEONS)
 201                 generateDungeons(stone_surface_max_y, stone_type);
 202
 203         // Generate the registered decorations
 204         if (flags & MG_DECORATIONS)
 205                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 206
 207         // Generate the registered ores
 208         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 209
 210         // Sprinkle some dust on top after everything else was generated
 211         dustTopNodes();
 212
 213         //printf("makeChunk: %dms\n", t.stop());
 214
 215         // Add top and bottom side of water to transforming_liquid queue
 216         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 217
 218         // Calculate lighting
 219         if (flags & MG_LIGHT) {
 220                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 221                         full_node_min, full_node_max);
 222         }
 223
 224         this->generating = false;
 225 }
 226
 227
 228 //bool is_cave(u32 index) {
 229 //      double d1 = contour(noise_cave1->result[index]);
 230 //      double d2 = contour(noise_cave2->result[index]);
 231 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 232 //}
 233
 234 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 235 //      double f = 0.55 + noise_factor->result[index2d];
 236 //      if(f < 0.01)
 237 //              f = 0.01;
 238 //      else if(f >= 1.0)
 239 //              f *= 1.6;
 240 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 241 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 242 //}
 243
 244
 245 int MapgenV5::generateBaseTerrain()
 246 {
 247         u32 index = 0;
 248         u32 index2d = 0;
 249         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 250
 251         noise_factor->perlinMap2D(node_min.X, node_min.Z);
 252         noise_height->perlinMap2D(node_min.X, node_min.Z);
 253         noise_ground->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 254
 255         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 256                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 257                         u32 vi = vm->m_area.index(node_min.X, y, z);
 258                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 259                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 260                                         continue;
 261
 262                                 float f = 0.55 + noise_factor->result[index2d];
 263                                 if (f < 0.01)
 264                                         f = 0.01;
 265                                 else if (f >= 1.0)
 266                                         f *= 1.6;
 267                                 float h = noise_height->result[index2d];
 268
 269                                 if (noise_ground->result[index] * f < y - h) {
 270                                         if (y <= water_level)
 271                                                 vm->m_data[vi] = MapNode(c_water_source);
 272                                         else
 273                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 274                                 } else {
 275                                         vm->m_data[vi] = MapNode(c_stone);
 276                                         if (y > stone_surface_max_y)
 277                                                 stone_surface_max_y = y;
 278                                 }
 279                         }
 280                         index2d -= ystride;
 281                 }
 282                 index2d += ystride;
 283         }
 284
 285         return stone_surface_max_y;
 286 }