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- /*
- Minetest
- Copyright (C) 2015-2020 paramat
- Copyright (C) 2015-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "mapgen.h"
- #include "voxel.h"
- #include "noise.h"
- #include "mapblock.h"
- #include "mapnode.h"
- #include "map.h"
- #include "nodedef.h"
- #include "voxelalgorithms.h"
- //#include "profiler.h" // For TimeTaker
- #include "settings.h" // For g_settings
- #include "emerge.h"
- #include "dungeongen.h"
- #include "cavegen.h"
- #include "mg_biome.h"
- #include "mg_ore.h"
- #include "mg_decoration.h"
- #include "mapgen_flat.h"
- FlagDesc flagdesc_mapgen_flat[] = {
- {"lakes", MGFLAT_LAKES},
- {"hills", MGFLAT_HILLS},
- {"caverns", MGFLAT_CAVERNS},
- {NULL, 0}
- };
- ///////////////////////////////////////////////////////////////////////////////////////
- MapgenFlat::MapgenFlat(MapgenFlatParams *params, EmergeParams *emerge)
- : MapgenBasic(MAPGEN_FLAT, params, emerge)
- {
- spflags = params->spflags;
- ground_level = params->ground_level;
- lake_threshold = params->lake_threshold;
- lake_steepness = params->lake_steepness;
- hill_threshold = params->hill_threshold;
- hill_steepness = params->hill_steepness;
- cave_width = params->cave_width;
- small_cave_num_min = params->small_cave_num_min;
- small_cave_num_max = params->small_cave_num_max;
- large_cave_num_min = params->large_cave_num_min;
- large_cave_num_max = params->large_cave_num_max;
- large_cave_depth = params->large_cave_depth;
- large_cave_flooded = params->large_cave_flooded;
- cavern_limit = params->cavern_limit;
- cavern_taper = params->cavern_taper;
- cavern_threshold = params->cavern_threshold;
- dungeon_ymin = params->dungeon_ymin;
- dungeon_ymax = params->dungeon_ymax;
- // 2D noise
- noise_filler_depth = new Noise(¶ms->np_filler_depth, seed, csize.X, csize.Z);
- if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
- noise_terrain = new Noise(¶ms->np_terrain, seed, csize.X, csize.Z);
- // 3D noise
- MapgenBasic::np_cave1 = params->np_cave1;
- MapgenBasic::np_cave2 = params->np_cave2;
- MapgenBasic::np_cavern = params->np_cavern;
- MapgenBasic::np_dungeons = params->np_dungeons;
- }
- MapgenFlat::~MapgenFlat()
- {
- delete noise_filler_depth;
- if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
- delete noise_terrain;
- }
- MapgenFlatParams::MapgenFlatParams():
- np_terrain (0, 1, v3f(600, 600, 600), 7244, 5, 0.6, 2.0),
- np_filler_depth (0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0),
- np_cavern (0.0, 1.0, v3f(384, 128, 384), 723, 5, 0.63, 2.0),
- np_cave1 (0, 12, v3f(61, 61, 61), 52534, 3, 0.5, 2.0),
- np_cave2 (0, 12, v3f(67, 67, 67), 10325, 3, 0.5, 2.0),
- np_dungeons (0.9, 0.5, v3f(500, 500, 500), 0, 2, 0.8, 2.0)
- {
- }
- void MapgenFlatParams::readParams(const Settings *settings)
- {
- settings->getFlagStrNoEx("mgflat_spflags", spflags, flagdesc_mapgen_flat);
- settings->getS16NoEx("mgflat_ground_level", ground_level);
- settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
- settings->getU16NoEx("mgflat_small_cave_num_min", small_cave_num_min);
- settings->getU16NoEx("mgflat_small_cave_num_max", small_cave_num_max);
- settings->getU16NoEx("mgflat_large_cave_num_min", large_cave_num_min);
- settings->getU16NoEx("mgflat_large_cave_num_max", large_cave_num_max);
- settings->getFloatNoEx("mgflat_large_cave_flooded", large_cave_flooded);
- settings->getFloatNoEx("mgflat_cave_width", cave_width);
- settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
- settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
- settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
- settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
- settings->getS16NoEx("mgflat_cavern_limit", cavern_limit);
- settings->getS16NoEx("mgflat_cavern_taper", cavern_taper);
- settings->getFloatNoEx("mgflat_cavern_threshold", cavern_threshold);
- settings->getS16NoEx("mgflat_dungeon_ymin", dungeon_ymin);
- settings->getS16NoEx("mgflat_dungeon_ymax", dungeon_ymax);
- settings->getNoiseParams("mgflat_np_terrain", np_terrain);
- settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
- settings->getNoiseParams("mgflat_np_cavern", np_cavern);
- settings->getNoiseParams("mgflat_np_cave1", np_cave1);
- settings->getNoiseParams("mgflat_np_cave2", np_cave2);
- settings->getNoiseParams("mgflat_np_dungeons", np_dungeons);
- }
- void MapgenFlatParams::writeParams(Settings *settings) const
- {
- settings->setFlagStr("mgflat_spflags", spflags, flagdesc_mapgen_flat);
- settings->setS16("mgflat_ground_level", ground_level);
- settings->setS16("mgflat_large_cave_depth", large_cave_depth);
- settings->setU16("mgflat_small_cave_num_min", small_cave_num_min);
- settings->setU16("mgflat_small_cave_num_max", small_cave_num_max);
- settings->setU16("mgflat_large_cave_num_min", large_cave_num_min);
- settings->setU16("mgflat_large_cave_num_max", large_cave_num_max);
- settings->setFloat("mgflat_large_cave_flooded", large_cave_flooded);
- settings->setFloat("mgflat_cave_width", cave_width);
- settings->setFloat("mgflat_lake_threshold", lake_threshold);
- settings->setFloat("mgflat_lake_steepness", lake_steepness);
- settings->setFloat("mgflat_hill_threshold", hill_threshold);
- settings->setFloat("mgflat_hill_steepness", hill_steepness);
- settings->setS16("mgflat_cavern_limit", cavern_limit);
- settings->setS16("mgflat_cavern_taper", cavern_taper);
- settings->setFloat("mgflat_cavern_threshold", cavern_threshold);
- settings->setS16("mgflat_dungeon_ymin", dungeon_ymin);
- settings->setS16("mgflat_dungeon_ymax", dungeon_ymax);
- settings->setNoiseParams("mgflat_np_terrain", np_terrain);
- settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
- settings->setNoiseParams("mgflat_np_cavern", np_cavern);
- settings->setNoiseParams("mgflat_np_cave1", np_cave1);
- settings->setNoiseParams("mgflat_np_cave2", np_cave2);
- settings->setNoiseParams("mgflat_np_dungeons", np_dungeons);
- }
- void MapgenFlatParams::setDefaultSettings(Settings *settings)
- {
- settings->setDefault("mgflat_spflags", flagdesc_mapgen_flat, 0);
- }
- /////////////////////////////////////////////////////////////////
- int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
- {
- s16 stone_level = ground_level;
- float n_terrain =
- ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS)) ?
- NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed) :
- 0.0f;
- if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
- s16 depress = (lake_threshold - n_terrain) * lake_steepness;
- stone_level = ground_level - depress;
- } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
- s16 rise = (n_terrain - hill_threshold) * hill_steepness;
- stone_level = ground_level + rise;
- }
- if (ground_level < water_level)
- // Ocean world, may not have islands so allow spawn in water
- return MYMAX(stone_level + 2, water_level);
- if (stone_level >= water_level)
- // Spawn on land
- // + 2 not + 1, to spawn above biome 'dust' nodes
- return stone_level + 2;
- // Unsuitable spawn point
- return MAX_MAP_GENERATION_LIMIT;
- }
- void MapgenFlat::makeChunk(BlockMakeData *data)
- {
- // Pre-conditions
- assert(data->vmanip);
- assert(data->nodedef);
- this->generating = true;
- this->vm = data->vmanip;
- this->ndef = data->nodedef;
- //TimeTaker t("makeChunk");
- v3s16 blockpos_min = data->blockpos_min;
- v3s16 blockpos_max = data->blockpos_max;
- node_min = blockpos_min * MAP_BLOCKSIZE;
- node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
- full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
- full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
- blockseed = getBlockSeed2(full_node_min, seed);
- // Generate base terrain, mountains, and ridges with initial heightmaps
- s16 stone_surface_max_y = generateTerrain();
- // Create heightmap
- updateHeightmap(node_min, node_max);
- // Init biome generator, place biome-specific nodes, and build biomemap
- if (flags & MG_BIOMES) {
- biomegen->calcBiomeNoise(node_min);
- generateBiomes();
- }
- // Generate tunnels, caverns and large randomwalk caves
- if (flags & MG_CAVES) {
- // Generate tunnels first as caverns confuse them
- generateCavesNoiseIntersection(stone_surface_max_y);
- // Generate caverns
- bool near_cavern = false;
- if (spflags & MGFLAT_CAVERNS)
- near_cavern = generateCavernsNoise(stone_surface_max_y);
- // Generate large randomwalk caves
- if (near_cavern)
- // Disable large randomwalk caves in this mapchunk by setting
- // 'large cave depth' to world base. Avoids excessive liquid in
- // large caverns and floating blobs of overgenerated liquid.
- generateCavesRandomWalk(stone_surface_max_y,
- -MAX_MAP_GENERATION_LIMIT);
- else
- generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
- }
- // Generate the registered ores
- if (flags & MG_ORES)
- m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
- if (flags & MG_DUNGEONS)
- generateDungeons(stone_surface_max_y);
- // Generate the registered decorations
- if (flags & MG_DECORATIONS)
- m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
- // Sprinkle some dust on top after everything else was generated
- if (flags & MG_BIOMES)
- dustTopNodes();
- //printf("makeChunk: %dms\n", t.stop());
- updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
- if (flags & MG_LIGHT)
- calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
- full_node_min, full_node_max);
- //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
- // node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
- this->generating = false;
- }
- s16 MapgenFlat::generateTerrain()
- {
- MapNode n_air(CONTENT_AIR);
- MapNode n_stone(c_stone);
- MapNode n_water(c_water_source);
- const v3s16 &em = vm->m_area.getExtent();
- s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
- u32 ni2d = 0;
- bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
- if (use_noise)
- noise_terrain->perlinMap2D(node_min.X, node_min.Z);
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
- s16 stone_level = ground_level;
- float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
- if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
- s16 depress = (lake_threshold - n_terrain) * lake_steepness;
- stone_level = ground_level - depress;
- } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
- s16 rise = (n_terrain - hill_threshold) * hill_steepness;
- stone_level = ground_level + rise;
- }
- u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
- for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
- if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
- if (y <= stone_level) {
- vm->m_data[vi] = n_stone;
- if (y > stone_surface_max_y)
- stone_surface_max_y = y;
- } else if (y <= water_level) {
- vm->m_data[vi] = n_water;
- } else {
- vm->m_data[vi] = n_air;
- }
- }
- VoxelArea::add_y(em, vi, 1);
- }
- }
- return stone_surface_max_y;
- }
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