12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106 |
- /*
- Minetest
- Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
- Copyright (C) 2013-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- Copyright (C) 2015-2018 paramat
- 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 <cmath>
- #include "mapgen.h"
- #include "voxel.h"
- #include "noise.h"
- #include "gamedef.h"
- #include "mg_biome.h"
- #include "mapblock.h"
- #include "mapnode.h"
- #include "map.h"
- #include "nodedef.h"
- #include "emerge.h"
- #include "voxelalgorithms.h"
- #include "porting.h"
- #include "profiler.h"
- #include "settings.h"
- #include "treegen.h"
- #include "serialization.h"
- #include "util/serialize.h"
- #include "util/numeric.h"
- #include "util/directiontables.h"
- #include "filesys.h"
- #include "log.h"
- #include "mapgen_carpathian.h"
- #include "mapgen_flat.h"
- #include "mapgen_fractal.h"
- #include "mapgen_v5.h"
- #include "mapgen_v6.h"
- #include "mapgen_v7.h"
- #include "mapgen_valleys.h"
- #include "mapgen_singlenode.h"
- #include "cavegen.h"
- #include "dungeongen.h"
- FlagDesc flagdesc_mapgen[] = {
- {"caves", MG_CAVES},
- {"dungeons", MG_DUNGEONS},
- {"light", MG_LIGHT},
- {"decorations", MG_DECORATIONS},
- {"biomes", MG_BIOMES},
- {"ores", MG_ORES},
- {NULL, 0}
- };
- FlagDesc flagdesc_gennotify[] = {
- {"dungeon", 1 << GENNOTIFY_DUNGEON},
- {"temple", 1 << GENNOTIFY_TEMPLE},
- {"cave_begin", 1 << GENNOTIFY_CAVE_BEGIN},
- {"cave_end", 1 << GENNOTIFY_CAVE_END},
- {"large_cave_begin", 1 << GENNOTIFY_LARGECAVE_BEGIN},
- {"large_cave_end", 1 << GENNOTIFY_LARGECAVE_END},
- {"decoration", 1 << GENNOTIFY_DECORATION},
- {NULL, 0}
- };
- struct MapgenDesc {
- const char *name;
- bool is_user_visible;
- };
- ////
- //// Built-in mapgens
- ////
- // Order used here defines the order of appearence in mainmenu.
- // v6 always last to discourage selection.
- // Special mapgens flat, fractal, singlenode, next to last. Of these, singlenode
- // last to discourage selection.
- // Of the remaining, v5 last due to age, v7 first due to being the default.
- // The order of 'enum MapgenType' in mapgen.h must match this order.
- static MapgenDesc g_reg_mapgens[] = {
- {"v7", true},
- {"valleys", true},
- {"carpathian", true},
- {"v5", true},
- {"flat", true},
- {"fractal", true},
- {"singlenode", true},
- {"v6", true},
- };
- STATIC_ASSERT(
- ARRLEN(g_reg_mapgens) == MAPGEN_INVALID,
- registered_mapgens_is_wrong_size);
- ////
- //// Mapgen
- ////
- Mapgen::Mapgen(int mapgenid, MapgenParams *params, EmergeParams *emerge) :
- gennotify(emerge->gen_notify_on, emerge->gen_notify_on_deco_ids)
- {
- id = mapgenid;
- water_level = params->water_level;
- mapgen_limit = params->mapgen_limit;
- flags = params->flags;
- csize = v3s16(1, 1, 1) * (params->chunksize * MAP_BLOCKSIZE);
- /*
- We are losing half our entropy by doing this, but it is necessary to
- preserve reverse compatibility. If the top half of our current 64 bit
- seeds ever starts getting used, existing worlds will break due to a
- different hash outcome and no way to differentiate between versions.
- A solution could be to add a new bit to designate that the top half of
- the seed value should be used, essentially a 1-bit version code, but
- this would require increasing the total size of a seed to 9 bytes (yuck)
- It's probably okay if this never gets fixed. 4.2 billion possibilities
- ought to be enough for anyone.
- */
- seed = (s32)params->seed;
- ndef = emerge->ndef;
- }
- MapgenType Mapgen::getMapgenType(const std::string &mgname)
- {
- for (size_t i = 0; i != ARRLEN(g_reg_mapgens); i++) {
- if (mgname == g_reg_mapgens[i].name)
- return (MapgenType)i;
- }
- return MAPGEN_INVALID;
- }
- const char *Mapgen::getMapgenName(MapgenType mgtype)
- {
- size_t index = (size_t)mgtype;
- if (index == MAPGEN_INVALID || index >= ARRLEN(g_reg_mapgens))
- return "invalid";
- return g_reg_mapgens[index].name;
- }
- Mapgen *Mapgen::createMapgen(MapgenType mgtype, MapgenParams *params,
- EmergeParams *emerge)
- {
- switch (mgtype) {
- case MAPGEN_CARPATHIAN:
- return new MapgenCarpathian((MapgenCarpathianParams *)params, emerge);
- case MAPGEN_FLAT:
- return new MapgenFlat((MapgenFlatParams *)params, emerge);
- case MAPGEN_FRACTAL:
- return new MapgenFractal((MapgenFractalParams *)params, emerge);
- case MAPGEN_SINGLENODE:
- return new MapgenSinglenode((MapgenSinglenodeParams *)params, emerge);
- case MAPGEN_V5:
- return new MapgenV5((MapgenV5Params *)params, emerge);
- case MAPGEN_V6:
- return new MapgenV6((MapgenV6Params *)params, emerge);
- case MAPGEN_V7:
- return new MapgenV7((MapgenV7Params *)params, emerge);
- case MAPGEN_VALLEYS:
- return new MapgenValleys((MapgenValleysParams *)params, emerge);
- default:
- return nullptr;
- }
- }
- MapgenParams *Mapgen::createMapgenParams(MapgenType mgtype)
- {
- switch (mgtype) {
- case MAPGEN_CARPATHIAN:
- return new MapgenCarpathianParams;
- case MAPGEN_FLAT:
- return new MapgenFlatParams;
- case MAPGEN_FRACTAL:
- return new MapgenFractalParams;
- case MAPGEN_SINGLENODE:
- return new MapgenSinglenodeParams;
- case MAPGEN_V5:
- return new MapgenV5Params;
- case MAPGEN_V6:
- return new MapgenV6Params;
- case MAPGEN_V7:
- return new MapgenV7Params;
- case MAPGEN_VALLEYS:
- return new MapgenValleysParams;
- default:
- return nullptr;
- }
- }
- void Mapgen::getMapgenNames(std::vector<const char *> *mgnames, bool include_hidden)
- {
- for (u32 i = 0; i != ARRLEN(g_reg_mapgens); i++) {
- if (include_hidden || g_reg_mapgens[i].is_user_visible)
- mgnames->push_back(g_reg_mapgens[i].name);
- }
- }
- void Mapgen::setDefaultSettings(Settings *settings)
- {
- settings->setDefault("mg_flags", flagdesc_mapgen,
- MG_CAVES | MG_DUNGEONS | MG_LIGHT | MG_DECORATIONS | MG_BIOMES | MG_ORES);
- for (int i = 0; i < (int)MAPGEN_INVALID; ++i) {
- MapgenParams *params = createMapgenParams((MapgenType)i);
- params->setDefaultSettings(settings);
- delete params;
- }
- }
- u32 Mapgen::getBlockSeed(v3s16 p, s32 seed)
- {
- return (u32)seed +
- p.Z * 38134234 +
- p.Y * 42123 +
- p.X * 23;
- }
- u32 Mapgen::getBlockSeed2(v3s16 p, s32 seed)
- {
- u32 n = 1619 * p.X + 31337 * p.Y + 52591 * p.Z + 1013 * seed;
- n = (n >> 13) ^ n;
- return (n * (n * n * 60493 + 19990303) + 1376312589);
- }
- // Returns -MAX_MAP_GENERATION_LIMIT if not found
- s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax)
- {
- const v3s16 &em = vm->m_area.getExtent();
- u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
- s16 y;
- for (y = ymax; y >= ymin; y--) {
- MapNode &n = vm->m_data[i];
- if (ndef->get(n).walkable)
- break;
- VoxelArea::add_y(em, i, -1);
- }
- return (y >= ymin) ? y : -MAX_MAP_GENERATION_LIMIT;
- }
- // Returns -MAX_MAP_GENERATION_LIMIT if not found or if ground is found first
- s16 Mapgen::findLiquidSurface(v2s16 p2d, s16 ymin, s16 ymax)
- {
- const v3s16 &em = vm->m_area.getExtent();
- u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
- s16 y;
- for (y = ymax; y >= ymin; y--) {
- MapNode &n = vm->m_data[i];
- if (ndef->get(n).walkable)
- return -MAX_MAP_GENERATION_LIMIT;
- if (ndef->get(n).isLiquid())
- break;
- VoxelArea::add_y(em, i, -1);
- }
- return (y >= ymin) ? y : -MAX_MAP_GENERATION_LIMIT;
- }
- void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax)
- {
- if (!heightmap)
- return;
- //TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
- int index = 0;
- for (s16 z = nmin.Z; z <= nmax.Z; z++) {
- for (s16 x = nmin.X; x <= nmax.X; x++, index++) {
- s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
- heightmap[index] = y;
- }
- }
- }
- void Mapgen::getSurfaces(v2s16 p2d, s16 ymin, s16 ymax,
- std::vector<s16> &floors, std::vector<s16> &ceilings)
- {
- const v3s16 &em = vm->m_area.getExtent();
- bool is_walkable = false;
- u32 vi = vm->m_area.index(p2d.X, ymax, p2d.Y);
- MapNode mn_max = vm->m_data[vi];
- bool walkable_above = ndef->get(mn_max).walkable;
- VoxelArea::add_y(em, vi, -1);
- for (s16 y = ymax - 1; y >= ymin; y--) {
- MapNode mn = vm->m_data[vi];
- is_walkable = ndef->get(mn).walkable;
- if (is_walkable && !walkable_above) {
- floors.push_back(y);
- } else if (!is_walkable && walkable_above) {
- ceilings.push_back(y + 1);
- }
- VoxelArea::add_y(em, vi, -1);
- walkable_above = is_walkable;
- }
- }
- inline bool Mapgen::isLiquidHorizontallyFlowable(u32 vi, v3s16 em)
- {
- u32 vi_neg_x = vi;
- VoxelArea::add_x(em, vi_neg_x, -1);
- if (vm->m_data[vi_neg_x].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_nx = ndef->get(vm->m_data[vi_neg_x]);
- if (c_nx.floodable && !c_nx.isLiquid())
- return true;
- }
- u32 vi_pos_x = vi;
- VoxelArea::add_x(em, vi_pos_x, +1);
- if (vm->m_data[vi_pos_x].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_px = ndef->get(vm->m_data[vi_pos_x]);
- if (c_px.floodable && !c_px.isLiquid())
- return true;
- }
- u32 vi_neg_z = vi;
- VoxelArea::add_z(em, vi_neg_z, -1);
- if (vm->m_data[vi_neg_z].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_nz = ndef->get(vm->m_data[vi_neg_z]);
- if (c_nz.floodable && !c_nz.isLiquid())
- return true;
- }
- u32 vi_pos_z = vi;
- VoxelArea::add_z(em, vi_pos_z, +1);
- if (vm->m_data[vi_pos_z].getContent() != CONTENT_IGNORE) {
- const ContentFeatures &c_pz = ndef->get(vm->m_data[vi_pos_z]);
- if (c_pz.floodable && !c_pz.isLiquid())
- return true;
- }
- return false;
- }
- void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax)
- {
- bool isignored, isliquid, wasignored, wasliquid, waschecked, waspushed;
- const v3s16 &em = vm->m_area.getExtent();
- for (s16 z = nmin.Z + 1; z <= nmax.Z - 1; z++)
- for (s16 x = nmin.X + 1; x <= nmax.X - 1; x++) {
- wasignored = true;
- wasliquid = false;
- waschecked = false;
- waspushed = false;
- u32 vi = vm->m_area.index(x, nmax.Y, z);
- for (s16 y = nmax.Y; y >= nmin.Y; y--) {
- isignored = vm->m_data[vi].getContent() == CONTENT_IGNORE;
- isliquid = ndef->get(vm->m_data[vi]).isLiquid();
- if (isignored || wasignored || isliquid == wasliquid) {
- // Neither topmost node of liquid column nor topmost node below column
- waschecked = false;
- waspushed = false;
- } else if (isliquid) {
- // This is the topmost node in the column
- bool ispushed = false;
- if (isLiquidHorizontallyFlowable(vi, em)) {
- trans_liquid->push_back(v3s16(x, y, z));
- ispushed = true;
- }
- // Remember waschecked and waspushed to avoid repeated
- // checks/pushes in case the column consists of only this node
- waschecked = true;
- waspushed = ispushed;
- } else {
- // This is the topmost node below a liquid column
- u32 vi_above = vi;
- VoxelArea::add_y(em, vi_above, 1);
- if (!waspushed && (ndef->get(vm->m_data[vi]).floodable ||
- (!waschecked && isLiquidHorizontallyFlowable(vi_above, em)))) {
- // Push back the lowest node in the column which is one
- // node above this one
- trans_liquid->push_back(v3s16(x, y + 1, z));
- }
- }
- wasliquid = isliquid;
- wasignored = isignored;
- VoxelArea::add_y(em, vi, -1);
- }
- }
- }
- void Mapgen::setLighting(u8 light, v3s16 nmin, v3s16 nmax)
- {
- ScopeProfiler sp(g_profiler, "EmergeThread: update lighting", SPT_AVG);
- VoxelArea a(nmin, nmax);
- for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
- for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
- u32 i = vm->m_area.index(a.MinEdge.X, y, z);
- for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
- vm->m_data[i].param1 = light;
- }
- }
- }
- void Mapgen::lightSpread(VoxelArea &a, std::queue<std::pair<v3s16, u8>> &queue,
- const v3s16 &p, u8 light)
- {
- if (light <= 1 || !a.contains(p))
- return;
- u32 vi = vm->m_area.index(p);
- MapNode &n = vm->m_data[vi];
- // Decay light in each of the banks separately
- u8 light_day = light & 0x0F;
- if (light_day > 0)
- light_day -= 0x01;
- u8 light_night = light & 0xF0;
- if (light_night > 0)
- light_night -= 0x10;
- // Bail out only if we have no more light from either bank to propogate, or
- // we hit a solid block that light cannot pass through.
- if ((light_day <= (n.param1 & 0x0F) &&
- light_night <= (n.param1 & 0xF0)) ||
- !ndef->get(n).light_propagates)
- return;
- // Since this recursive function only terminates when there is no light from
- // either bank left, we need to take the max of both banks into account for
- // the case where spreading has stopped for one light bank but not the other.
- light = MYMAX(light_day, n.param1 & 0x0F) |
- MYMAX(light_night, n.param1 & 0xF0);
- n.param1 = light;
- // add to queue
- queue.emplace(p, light);
- }
- void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax,
- bool propagate_shadow)
- {
- ScopeProfiler sp(g_profiler, "EmergeThread: update lighting", SPT_AVG);
- //TimeTaker t("updateLighting");
- propagateSunlight(nmin, nmax, propagate_shadow);
- spreadLight(full_nmin, full_nmax);
- //printf("updateLighting: %dms\n", t.stop());
- }
- void Mapgen::propagateSunlight(v3s16 nmin, v3s16 nmax, bool propagate_shadow)
- {
- //TimeTaker t("propagateSunlight");
- VoxelArea a(nmin, nmax);
- bool block_is_underground = (water_level >= nmax.Y);
- const v3s16 &em = vm->m_area.getExtent();
- // NOTE: Direct access to the low 4 bits of param1 is okay here because,
- // by definition, sunlight will never be in the night lightbank.
- for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
- for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
- // see if we can get a light value from the overtop
- u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
- if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
- if (block_is_underground)
- continue;
- } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN &&
- propagate_shadow) {
- continue;
- }
- VoxelArea::add_y(em, i, -1);
- for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
- MapNode &n = vm->m_data[i];
- if (!ndef->get(n).sunlight_propagates)
- break;
- n.param1 = LIGHT_SUN;
- VoxelArea::add_y(em, i, -1);
- }
- }
- }
- //printf("propagateSunlight: %dms\n", t.stop());
- }
- void Mapgen::spreadLight(const v3s16 &nmin, const v3s16 &nmax)
- {
- //TimeTaker t("spreadLight");
- std::queue<std::pair<v3s16, u8>> queue;
- VoxelArea a(nmin, nmax);
- for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
- for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
- u32 i = vm->m_area.index(a.MinEdge.X, y, z);
- for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
- MapNode &n = vm->m_data[i];
- if (n.getContent() == CONTENT_IGNORE)
- continue;
- const ContentFeatures &cf = ndef->get(n);
- if (!cf.light_propagates)
- continue;
- // TODO(hmmmmm): Abstract away direct param1 accesses with a
- // wrapper, but something lighter than MapNode::get/setLight
- u8 light_produced = cf.light_source;
- if (light_produced)
- n.param1 = light_produced | (light_produced << 4);
- u8 light = n.param1;
- if (light) {
- const v3s16 p(x, y, z);
- // spread to all 6 neighbor nodes
- for (const auto &dir : g_6dirs)
- lightSpread(a, queue, p + dir, light);
- }
- }
- }
- }
- while (!queue.empty()) {
- const auto &i = queue.front();
- // spread to all 6 neighbor nodes
- for (const auto &dir : g_6dirs)
- lightSpread(a, queue, i.first + dir, i.second);
- queue.pop();
- }
- //printf("spreadLight: %lums\n", t.stop());
- }
- ////
- //// MapgenBasic
- ////
- MapgenBasic::MapgenBasic(int mapgenid, MapgenParams *params, EmergeParams *emerge)
- : Mapgen(mapgenid, params, emerge)
- {
- this->m_emerge = emerge;
- this->m_bmgr = emerge->biomemgr;
- //// Here, 'stride' refers to the number of elements needed to skip to index
- //// an adjacent element for that coordinate in noise/height/biome maps
- //// (*not* vmanip content map!)
- // Note there is no X stride explicitly defined. Items adjacent in the X
- // coordinate are assumed to be adjacent in memory as well (i.e. stride of 1).
- // Number of elements to skip to get to the next Y coordinate
- this->ystride = csize.X;
- // Number of elements to skip to get to the next Z coordinate
- this->zstride = csize.X * csize.Y;
- // Z-stride value for maps oversized for 1-down overgeneration
- this->zstride_1d = csize.X * (csize.Y + 1);
- // Z-stride value for maps oversized for 1-up 1-down overgeneration
- this->zstride_1u1d = csize.X * (csize.Y + 2);
- //// Allocate heightmap
- this->heightmap = new s16[csize.X * csize.Z];
- //// Initialize biome generator
- biomegen = emerge->biomegen;
- biomegen->assertChunkSize(csize);
- biomemap = biomegen->biomemap;
- //// Look up some commonly used content
- c_stone = ndef->getId("mapgen_stone");
- c_water_source = ndef->getId("mapgen_water_source");
- c_river_water_source = ndef->getId("mapgen_river_water_source");
- c_lava_source = ndef->getId("mapgen_lava_source");
- c_cobble = ndef->getId("mapgen_cobble");
- // Fall back to more basic content if not defined.
- // Lava falls back to water as both are suitable as cave liquids.
- if (c_lava_source == CONTENT_IGNORE)
- c_lava_source = c_water_source;
- if (c_stone == CONTENT_IGNORE)
- errorstream << "Mapgen: Mapgen alias 'mapgen_stone' is invalid!" << std::endl;
- if (c_water_source == CONTENT_IGNORE)
- errorstream << "Mapgen: Mapgen alias 'mapgen_water_source' is invalid!" << std::endl;
- if (c_river_water_source == CONTENT_IGNORE)
- warningstream << "Mapgen: Mapgen alias 'mapgen_river_water_source' is invalid!" << std::endl;
- }
- MapgenBasic::~MapgenBasic()
- {
- delete []heightmap;
- delete m_emerge; // destroying EmergeParams is our responsibility
- }
- void MapgenBasic::generateBiomes()
- {
- // can't generate biomes without a biome generator!
- assert(biomegen);
- assert(biomemap);
- const v3s16 &em = vm->m_area.getExtent();
- u32 index = 0;
- noise_filler_depth->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++, index++) {
- Biome *biome = NULL;
- biome_t water_biome_index = 0;
- u16 depth_top = 0;
- u16 base_filler = 0;
- u16 depth_water_top = 0;
- u16 depth_riverbed = 0;
- s16 biome_y_min = -MAX_MAP_GENERATION_LIMIT;
- u32 vi = vm->m_area.index(x, node_max.Y, z);
- // Check node at base of mapchunk above, either a node of a previously
- // generated mapchunk or if not, a node of overgenerated base terrain.
- content_t c_above = vm->m_data[vi + em.X].getContent();
- bool air_above = c_above == CONTENT_AIR;
- bool river_water_above = c_above == c_river_water_source;
- bool water_above = c_above == c_water_source || river_water_above;
- biomemap[index] = BIOME_NONE;
- // If there is air or water above enable top/filler placement, otherwise force
- // nplaced to stone level by setting a number exceeding any possible filler depth.
- u16 nplaced = (air_above || water_above) ? 0 : U16_MAX;
- for (s16 y = node_max.Y; y >= node_min.Y; y--) {
- content_t c = vm->m_data[vi].getContent();
- // Biome is (re)calculated:
- // 1. At the surface of stone below air or water.
- // 2. At the surface of water below air.
- // 3. When stone or water is detected but biome has not yet been calculated.
- // 4. When stone or water is detected just below a biome's lower limit.
- bool is_stone_surface = (c == c_stone) &&
- (air_above || water_above || !biome || y < biome_y_min); // 1, 3, 4
- bool is_water_surface =
- (c == c_water_source || c == c_river_water_source) &&
- (air_above || !biome || y < biome_y_min); // 2, 3, 4
- if (is_stone_surface || is_water_surface) {
- // (Re)calculate biome
- biome = biomegen->getBiomeAtIndex(index, v3s16(x, y, z));
- // Add biome to biomemap at first stone surface detected
- if (biomemap[index] == BIOME_NONE && is_stone_surface)
- biomemap[index] = biome->index;
- // Store biome of first water surface detected, as a fallback
- // entry for the biomemap.
- if (water_biome_index == 0 && is_water_surface)
- water_biome_index = biome->index;
- depth_top = biome->depth_top;
- base_filler = MYMAX(depth_top +
- biome->depth_filler +
- noise_filler_depth->result[index], 0.0f);
- depth_water_top = biome->depth_water_top;
- depth_riverbed = biome->depth_riverbed;
- biome_y_min = biome->min_pos.Y;
- }
- if (c == c_stone) {
- content_t c_below = vm->m_data[vi - em.X].getContent();
- // If the node below isn't solid, make this node stone, so that
- // any top/filler nodes above are structurally supported.
- // This is done by aborting the cycle of top/filler placement
- // immediately by forcing nplaced to stone level.
- if (c_below == CONTENT_AIR
- || c_below == c_water_source
- || c_below == c_river_water_source)
- nplaced = U16_MAX;
- if (river_water_above) {
- if (nplaced < depth_riverbed) {
- vm->m_data[vi] = MapNode(biome->c_riverbed);
- nplaced++;
- } else {
- nplaced = U16_MAX; // Disable top/filler placement
- river_water_above = false;
- }
- } else if (nplaced < depth_top) {
- vm->m_data[vi] = MapNode(biome->c_top);
- nplaced++;
- } else if (nplaced < base_filler) {
- vm->m_data[vi] = MapNode(biome->c_filler);
- nplaced++;
- } else {
- vm->m_data[vi] = MapNode(biome->c_stone);
- nplaced = U16_MAX; // Disable top/filler placement
- }
- air_above = false;
- water_above = false;
- } else if (c == c_water_source) {
- vm->m_data[vi] = MapNode((y > (s32)(water_level - depth_water_top))
- ? biome->c_water_top : biome->c_water);
- nplaced = 0; // Enable top/filler placement for next surface
- air_above = false;
- water_above = true;
- } else if (c == c_river_water_source) {
- vm->m_data[vi] = MapNode(biome->c_river_water);
- nplaced = 0; // Enable riverbed placement for next surface
- air_above = false;
- water_above = true;
- river_water_above = true;
- } else if (c == CONTENT_AIR) {
- nplaced = 0; // Enable top/filler placement for next surface
- air_above = true;
- water_above = false;
- } else { // Possible various nodes overgenerated from neighbouring mapchunks
- nplaced = U16_MAX; // Disable top/filler placement
- air_above = false;
- water_above = false;
- }
- VoxelArea::add_y(em, vi, -1);
- }
- // If no stone surface detected in mapchunk column and a water surface
- // biome fallback exists, add it to the biomemap. This avoids water
- // surface decorations failing in deep water.
- if (biomemap[index] == BIOME_NONE && water_biome_index != 0)
- biomemap[index] = water_biome_index;
- }
- }
- void MapgenBasic::dustTopNodes()
- {
- if (node_max.Y < water_level)
- return;
- const v3s16 &em = vm->m_area.getExtent();
- u32 index = 0;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
- Biome *biome = (Biome *)m_bmgr->getRaw(biomemap[index]);
- if (biome->c_dust == CONTENT_IGNORE)
- continue;
- // Check if mapchunk above has generated, if so, drop dust from 16 nodes
- // above current mapchunk top, above decorations that will extend above
- // the current mapchunk. If the mapchunk above has not generated, it
- // will provide this required dust when it does.
- u32 vi = vm->m_area.index(x, full_node_max.Y, z);
- content_t c_full_max = vm->m_data[vi].getContent();
- s16 y_start;
- if (c_full_max == CONTENT_AIR) {
- y_start = full_node_max.Y - 1;
- } else if (c_full_max == CONTENT_IGNORE) {
- vi = vm->m_area.index(x, node_max.Y + 1, z);
- content_t c_max = vm->m_data[vi].getContent();
- if (c_max == CONTENT_AIR)
- y_start = node_max.Y;
- else
- continue;
- } else {
- continue;
- }
- vi = vm->m_area.index(x, y_start, z);
- for (s16 y = y_start; y >= node_min.Y - 1; y--) {
- if (vm->m_data[vi].getContent() != CONTENT_AIR)
- break;
- VoxelArea::add_y(em, vi, -1);
- }
- content_t c = vm->m_data[vi].getContent();
- NodeDrawType dtype = ndef->get(c).drawtype;
- // Only place on cubic, walkable, non-dust nodes.
- // Dust check needed due to avoid double layer of dust caused by
- // dropping dust from 16 nodes above mapchunk top.
- if ((dtype == NDT_NORMAL ||
- dtype == NDT_ALLFACES ||
- dtype == NDT_ALLFACES_OPTIONAL ||
- dtype == NDT_GLASSLIKE ||
- dtype == NDT_GLASSLIKE_FRAMED ||
- dtype == NDT_GLASSLIKE_FRAMED_OPTIONAL) &&
- ndef->get(c).walkable && c != biome->c_dust) {
- VoxelArea::add_y(em, vi, 1);
- vm->m_data[vi] = MapNode(biome->c_dust);
- }
- }
- }
- void MapgenBasic::generateCavesNoiseIntersection(s16 max_stone_y)
- {
- // cave_width >= 10 is used to disable generation and avoid the intensive
- // 3D noise calculations. Tunnels already have zero width when cave_width > 1.
- if (node_min.Y > max_stone_y || cave_width >= 10.0f)
- return;
- CavesNoiseIntersection caves_noise(ndef, m_bmgr, csize,
- &np_cave1, &np_cave2, seed, cave_width);
- caves_noise.generateCaves(vm, node_min, node_max, biomemap);
- }
- void MapgenBasic::generateCavesRandomWalk(s16 max_stone_y, s16 large_cave_ymax)
- {
- if (node_min.Y > max_stone_y)
- return;
- PseudoRandom ps(blockseed + 21343);
- // Small randomwalk caves
- u32 num_small_caves = ps.range(small_cave_num_min, small_cave_num_max);
- for (u32 i = 0; i < num_small_caves; i++) {
- CavesRandomWalk cave(ndef, &gennotify, seed, water_level,
- c_water_source, c_lava_source, large_cave_flooded, biomegen);
- cave.makeCave(vm, node_min, node_max, &ps, false, max_stone_y, heightmap);
- }
- if (node_max.Y > large_cave_ymax)
- return;
- // Large randomwalk caves below 'large_cave_ymax'.
- // 'large_cave_ymax' can differ from the 'large_cave_depth' mapgen parameter,
- // it is set to world base to disable large caves in or near caverns.
- u32 num_large_caves = ps.range(large_cave_num_min, large_cave_num_max);
- for (u32 i = 0; i < num_large_caves; i++) {
- CavesRandomWalk cave(ndef, &gennotify, seed, water_level,
- c_water_source, c_lava_source, large_cave_flooded, biomegen);
- cave.makeCave(vm, node_min, node_max, &ps, true, max_stone_y, heightmap);
- }
- }
- bool MapgenBasic::generateCavernsNoise(s16 max_stone_y)
- {
- if (node_min.Y > max_stone_y || node_min.Y > cavern_limit)
- return false;
- CavernsNoise caverns_noise(ndef, csize, &np_cavern,
- seed, cavern_limit, cavern_taper, cavern_threshold);
- return caverns_noise.generateCaverns(vm, node_min, node_max);
- }
- void MapgenBasic::generateDungeons(s16 max_stone_y)
- {
- if (node_min.Y > max_stone_y || node_min.Y > dungeon_ymax ||
- node_max.Y < dungeon_ymin)
- return;
- u16 num_dungeons = std::fmax(std::floor(
- NoisePerlin3D(&np_dungeons, node_min.X, node_min.Y, node_min.Z, seed)), 0.0f);
- if (num_dungeons == 0)
- return;
- PseudoRandom ps(blockseed + 70033);
- DungeonParams dp;
- dp.np_alt_wall =
- NoiseParams(-0.4, 1.0, v3f(40.0, 40.0, 40.0), 32474, 6, 1.1, 2.0);
- dp.seed = seed;
- dp.only_in_ground = true;
- dp.num_dungeons = num_dungeons;
- dp.notifytype = GENNOTIFY_DUNGEON;
- dp.num_rooms = ps.range(2, 16);
- dp.room_size_min = v3s16(5, 5, 5);
- dp.room_size_max = v3s16(12, 6, 12);
- dp.room_size_large_min = v3s16(12, 6, 12);
- dp.room_size_large_max = v3s16(16, 16, 16);
- dp.large_room_chance = (ps.range(1, 4) == 1) ? 8 : 0;
- dp.diagonal_dirs = ps.range(1, 8) == 1;
- // Diagonal corridors must have 'hole' width >=2 to be passable
- u8 holewidth = (dp.diagonal_dirs) ? 2 : ps.range(1, 2);
- dp.holesize = v3s16(holewidth, 3, holewidth);
- dp.corridor_len_min = 1;
- dp.corridor_len_max = 13;
- // Get biome at mapchunk midpoint
- v3s16 chunk_mid = node_min + (node_max - node_min) / v3s16(2, 2, 2);
- Biome *biome = (Biome *)biomegen->getBiomeAtPoint(chunk_mid);
- // Use biome-defined dungeon nodes if defined
- if (biome->c_dungeon != CONTENT_IGNORE) {
- dp.c_wall = biome->c_dungeon;
- // If 'node_dungeon_alt' is not defined by biome, it and dp.c_alt_wall
- // become CONTENT_IGNORE which skips the alt wall node placement loop in
- // dungeongen.cpp.
- dp.c_alt_wall = biome->c_dungeon_alt;
- // Stairs fall back to 'c_dungeon' if not defined by biome
- dp.c_stair = (biome->c_dungeon_stair != CONTENT_IGNORE) ?
- biome->c_dungeon_stair : biome->c_dungeon;
- // Fallback to using cobble mapgen alias if defined
- } else if (c_cobble != CONTENT_IGNORE) {
- dp.c_wall = c_cobble;
- dp.c_alt_wall = CONTENT_IGNORE;
- dp.c_stair = c_cobble;
- // Fallback to using biome-defined stone
- } else {
- dp.c_wall = biome->c_stone;
- dp.c_alt_wall = CONTENT_IGNORE;
- dp.c_stair = biome->c_stone;
- }
- DungeonGen dgen(ndef, &gennotify, &dp);
- dgen.generate(vm, blockseed, full_node_min, full_node_max);
- }
- ////
- //// GenerateNotifier
- ////
- GenerateNotifier::GenerateNotifier(u32 notify_on,
- const std::set<u32> *notify_on_deco_ids)
- {
- m_notify_on = notify_on;
- m_notify_on_deco_ids = notify_on_deco_ids;
- }
- bool GenerateNotifier::addEvent(GenNotifyType type, v3s16 pos, u32 id)
- {
- if (!(m_notify_on & (1 << type)))
- return false;
- if (type == GENNOTIFY_DECORATION &&
- m_notify_on_deco_ids->find(id) == m_notify_on_deco_ids->cend())
- return false;
- GenNotifyEvent gne;
- gne.type = type;
- gne.pos = pos;
- gne.id = id;
- m_notify_events.push_back(gne);
- return true;
- }
- void GenerateNotifier::getEvents(
- std::map<std::string, std::vector<v3s16> > &event_map)
- {
- std::list<GenNotifyEvent>::iterator it;
- for (it = m_notify_events.begin(); it != m_notify_events.end(); ++it) {
- GenNotifyEvent &gn = *it;
- std::string name = (gn.type == GENNOTIFY_DECORATION) ?
- "decoration#"+ itos(gn.id) :
- flagdesc_gennotify[gn.type].name;
- event_map[name].push_back(gn.pos);
- }
- }
- void GenerateNotifier::clearEvents()
- {
- m_notify_events.clear();
- }
- ////
- //// MapgenParams
- ////
- MapgenParams::~MapgenParams()
- {
- delete bparams;
- }
- void MapgenParams::readParams(const Settings *settings)
- {
- // should always be used via MapSettingsManager
- assert(settings != g_settings);
- std::string seed_str;
- if (settings->getNoEx("seed", seed_str)) {
- if (!seed_str.empty())
- seed = read_seed(seed_str.c_str());
- else
- myrand_bytes(&seed, sizeof(seed));
- }
- std::string mg_name;
- if (settings->getNoEx("mg_name", mg_name)) {
- mgtype = Mapgen::getMapgenType(mg_name);
- if (mgtype == MAPGEN_INVALID)
- mgtype = MAPGEN_DEFAULT;
- }
- settings->getS16NoEx("water_level", water_level);
- settings->getS16NoEx("mapgen_limit", mapgen_limit);
- settings->getS16NoEx("chunksize", chunksize);
- settings->getFlagStrNoEx("mg_flags", flags, flagdesc_mapgen);
- delete bparams;
- bparams = BiomeManager::createBiomeParams(BIOMEGEN_ORIGINAL);
- if (bparams) {
- bparams->readParams(settings);
- bparams->seed = seed;
- }
- }
- void MapgenParams::writeParams(Settings *settings) const
- {
- settings->set("mg_name", Mapgen::getMapgenName(mgtype));
- settings->setU64("seed", seed);
- settings->setS16("water_level", water_level);
- settings->setS16("mapgen_limit", mapgen_limit);
- settings->setS16("chunksize", chunksize);
- settings->setFlagStr("mg_flags", flags, flagdesc_mapgen);
- if (bparams)
- bparams->writeParams(settings);
- }
- // Calculate exact edges of the outermost mapchunks that are within the
- // set 'mapgen_limit'.
- void MapgenParams::calcMapgenEdges()
- {
- // Central chunk offset, in blocks
- s16 ccoff_b = -chunksize / 2;
- // Chunksize, in nodes
- s32 csize_n = chunksize * MAP_BLOCKSIZE;
- // Minp/maxp of central chunk, in nodes
- s16 ccmin = ccoff_b * MAP_BLOCKSIZE;
- s16 ccmax = ccmin + csize_n - 1;
- // Fullminp/fullmaxp of central chunk, in nodes
- s16 ccfmin = ccmin - MAP_BLOCKSIZE;
- s16 ccfmax = ccmax + MAP_BLOCKSIZE;
- // Effective mapgen limit, in blocks
- // Uses same calculation as ServerMap::blockpos_over_mapgen_limit(v3s16 p)
- s16 mapgen_limit_b = rangelim(mapgen_limit,
- 0, MAX_MAP_GENERATION_LIMIT) / MAP_BLOCKSIZE;
- // Effective mapgen limits, in nodes
- s16 mapgen_limit_min = -mapgen_limit_b * MAP_BLOCKSIZE;
- s16 mapgen_limit_max = (mapgen_limit_b + 1) * MAP_BLOCKSIZE - 1;
- // Number of complete chunks from central chunk fullminp/fullmaxp
- // to effective mapgen limits.
- s16 numcmin = MYMAX((ccfmin - mapgen_limit_min) / csize_n, 0);
- s16 numcmax = MYMAX((mapgen_limit_max - ccfmax) / csize_n, 0);
- // Mapgen edges, in nodes
- mapgen_edge_min = ccmin - numcmin * csize_n;
- mapgen_edge_max = ccmax + numcmax * csize_n;
- m_mapgen_edges_calculated = true;
- }
- s32 MapgenParams::getSpawnRangeMax()
- {
- if (!m_mapgen_edges_calculated)
- calcMapgenEdges();
- return MYMIN(-mapgen_edge_min, mapgen_edge_max);
- }
|