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- /*
- Minetest
- Copyright (C) 2010-2024 celeron55, Perttu Ahola <celeron55@gmail.com>
- 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 "map.h"
- #include "mapsector.h"
- #include "filesys.h"
- #include "voxel.h"
- #include "voxelalgorithms.h"
- #include "porting.h"
- #include "serialization.h"
- #include "settings.h"
- #include "log.h"
- #include "profiler.h"
- #include "gamedef.h"
- #include "util/directiontables.h"
- #include "rollback_interface.h"
- #include "reflowscan.h"
- #include "emerge.h"
- #include "mapgen/mapgen_v6.h"
- #include "mapgen/mg_biome.h"
- #include "config.h"
- #include "server.h"
- #include "database/database.h"
- #include "database/database-dummy.h"
- #include "database/database-sqlite3.h"
- #include "script/scripting_server.h"
- #include "irrlicht_changes/printing.h"
- #if USE_LEVELDB
- #include "database/database-leveldb.h"
- #endif
- #if USE_REDIS
- #include "database/database-redis.h"
- #endif
- #if USE_POSTGRESQL
- #include "database/database-postgresql.h"
- #endif
- /*
- ServerMap
- */
- ServerMap::ServerMap(const std::string &savedir, IGameDef *gamedef,
- EmergeManager *emerge, MetricsBackend *mb):
- Map(gamedef),
- settings_mgr(savedir + DIR_DELIM + "map_meta.txt"),
- m_emerge(emerge)
- {
- verbosestream<<FUNCTION_NAME<<std::endl;
- // Tell the EmergeManager about our MapSettingsManager
- emerge->map_settings_mgr = &settings_mgr;
- /*
- Try to load map; if not found, create a new one.
- */
- // Determine which database backend to use
- std::string conf_path = savedir + DIR_DELIM + "world.mt";
- Settings conf;
- bool succeeded = conf.readConfigFile(conf_path.c_str());
- if (!succeeded || !conf.exists("backend")) {
- // fall back to sqlite3
- conf.set("backend", "sqlite3");
- }
- std::string backend = conf.get("backend");
- dbase = createDatabase(backend, savedir, conf);
- if (conf.exists("readonly_backend")) {
- std::string readonly_dir = savedir + DIR_DELIM + "readonly";
- dbase_ro = createDatabase(conf.get("readonly_backend"), readonly_dir, conf);
- }
- if (!conf.updateConfigFile(conf_path.c_str()))
- errorstream << "ServerMap::ServerMap(): Failed to update world.mt!" << std::endl;
- m_savedir = savedir;
- m_map_saving_enabled = false;
- m_save_time_counter = mb->addCounter(
- "minetest_map_save_time", "Time spent saving blocks (in microseconds)");
- m_save_count_counter = mb->addCounter(
- "minetest_map_saved_blocks", "Number of blocks saved");
- m_loaded_blocks_gauge = mb->addGauge(
- "minetest_map_loaded_blocks", "Number of loaded blocks");
- m_map_compression_level = rangelim(g_settings->getS16("map_compression_level_disk"), -1, 9);
- try {
- // If directory exists, check contents and load if possible
- if (fs::PathExists(m_savedir)) {
- // If directory is empty, it is safe to save into it.
- if (fs::GetDirListing(m_savedir).empty()) {
- infostream<<"ServerMap: Empty save directory is valid."
- <<std::endl;
- m_map_saving_enabled = true;
- }
- else
- {
- if (settings_mgr.loadMapMeta()) {
- infostream << "ServerMap: Metadata loaded from "
- << savedir << std::endl;
- } else {
- infostream << "ServerMap: Metadata could not be loaded "
- "from " << savedir << ", assuming valid save "
- "directory." << std::endl;
- }
- m_map_saving_enabled = true;
- // Map loaded, not creating new one
- return;
- }
- }
- // If directory doesn't exist, it is safe to save to it
- else{
- m_map_saving_enabled = true;
- }
- }
- catch(std::exception &e)
- {
- warningstream<<"ServerMap: Failed to load map from "<<savedir
- <<", exception: "<<e.what()<<std::endl;
- infostream<<"Please remove the map or fix it."<<std::endl;
- warningstream<<"Map saving will be disabled."<<std::endl;
- }
- }
- ServerMap::~ServerMap()
- {
- verbosestream<<FUNCTION_NAME<<std::endl;
- try
- {
- if (m_map_saving_enabled) {
- // Save only changed parts
- save(MOD_STATE_WRITE_AT_UNLOAD);
- infostream << "ServerMap: Saved map to " << m_savedir << std::endl;
- } else {
- infostream << "ServerMap: Map not saved" << std::endl;
- }
- }
- catch(std::exception &e)
- {
- errorstream << "ServerMap: Failed to save map to " << m_savedir
- << ", exception: " << e.what() << std::endl;
- }
- /*
- Close database if it was opened
- */
- delete dbase;
- delete dbase_ro;
- deleteDetachedBlocks();
- }
- MapgenParams *ServerMap::getMapgenParams()
- {
- // getMapgenParams() should only ever be called after Server is initialized
- assert(settings_mgr.mapgen_params != NULL);
- return settings_mgr.mapgen_params;
- }
- u64 ServerMap::getSeed()
- {
- return getMapgenParams()->seed;
- }
- bool ServerMap::blockpos_over_mapgen_limit(v3s16 p)
- {
- const s16 mapgen_limit_bp = rangelim(
- getMapgenParams()->mapgen_limit, 0, MAX_MAP_GENERATION_LIMIT) /
- MAP_BLOCKSIZE;
- return p.X < -mapgen_limit_bp ||
- p.X > mapgen_limit_bp ||
- p.Y < -mapgen_limit_bp ||
- p.Y > mapgen_limit_bp ||
- p.Z < -mapgen_limit_bp ||
- p.Z > mapgen_limit_bp;
- }
- bool ServerMap::initBlockMake(v3s16 blockpos, BlockMakeData *data)
- {
- s16 csize = getMapgenParams()->chunksize;
- v3s16 bpmin = EmergeManager::getContainingChunk(blockpos, csize);
- v3s16 bpmax = bpmin + v3s16(1, 1, 1) * (csize - 1);
- if (!m_chunks_in_progress.insert(bpmin).second)
- return false;
- bool enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
- EMERGE_DBG_OUT("initBlockMake(): " << bpmin << " - " << bpmax);
- v3s16 extra_borders(1, 1, 1);
- v3s16 full_bpmin = bpmin - extra_borders;
- v3s16 full_bpmax = bpmax + extra_borders;
- // Do nothing if not inside mapgen limits (+-1 because of neighbors)
- if (blockpos_over_mapgen_limit(full_bpmin) ||
- blockpos_over_mapgen_limit(full_bpmax))
- return false;
- data->seed = getSeed();
- data->blockpos_min = bpmin;
- data->blockpos_max = bpmax;
- data->nodedef = m_nodedef;
- /*
- Create the whole area of this and the neighboring blocks
- */
- for (s16 x = full_bpmin.X; x <= full_bpmax.X; x++)
- for (s16 z = full_bpmin.Z; z <= full_bpmax.Z; z++) {
- v2s16 sectorpos(x, z);
- // Sector metadata is loaded from disk if not already loaded.
- MapSector *sector = createSector(sectorpos);
- FATAL_ERROR_IF(sector == NULL, "createSector() failed");
- for (s16 y = full_bpmin.Y; y <= full_bpmax.Y; y++) {
- v3s16 p(x, y, z);
- MapBlock *block = emergeBlock(p, false);
- if (block == NULL) {
- block = createBlock(p);
- // Block gets sunlight if this is true.
- // Refer to the map generator heuristics.
- bool ug = m_emerge->isBlockUnderground(p);
- block->setIsUnderground(ug);
- }
- }
- }
- /*
- Now we have a big empty area.
- Make a ManualMapVoxelManipulator that contains this and the
- neighboring blocks
- */
- data->vmanip = new MMVManip(this);
- data->vmanip->initialEmerge(full_bpmin, full_bpmax);
- // Data is ready now.
- return true;
- }
- void ServerMap::finishBlockMake(BlockMakeData *data,
- std::map<v3s16, MapBlock*> *changed_blocks)
- {
- v3s16 bpmin = data->blockpos_min;
- v3s16 bpmax = data->blockpos_max;
- bool enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
- EMERGE_DBG_OUT("finishBlockMake(): " << bpmin << " - " << bpmax);
- /*
- Blit generated stuff to map
- NOTE: blitBackAll adds nearly everything to changed_blocks
- */
- data->vmanip->blitBackAll(changed_blocks);
- EMERGE_DBG_OUT("finishBlockMake: changed_blocks.size()="
- << changed_blocks->size());
- /*
- Copy transforming liquid information
- */
- while (data->transforming_liquid.size()) {
- m_transforming_liquid.push_back(data->transforming_liquid.front());
- data->transforming_liquid.pop_front();
- }
- for (auto &changed_block : *changed_blocks) {
- MapBlock *block = changed_block.second;
- if (!block)
- continue;
- /*
- Update is air cache of the MapBlocks
- */
- block->expireIsAirCache();
- /*
- Set block as modified
- */
- block->raiseModified(MOD_STATE_WRITE_NEEDED,
- MOD_REASON_EXPIRE_IS_AIR);
- }
- /*
- Set central blocks as generated
- */
- for (s16 x = bpmin.X; x <= bpmax.X; x++)
- for (s16 z = bpmin.Z; z <= bpmax.Z; z++)
- for (s16 y = bpmin.Y; y <= bpmax.Y; y++) {
- MapBlock *block = getBlockNoCreateNoEx(v3s16(x, y, z));
- if (!block)
- continue;
- block->setGenerated(true);
- }
- /*
- Save changed parts of map
- NOTE: Will be saved later.
- */
- //save(MOD_STATE_WRITE_AT_UNLOAD);
- m_chunks_in_progress.erase(bpmin);
- }
- MapSector *ServerMap::createSector(v2s16 p2d)
- {
- /*
- Check if it exists already in memory
- */
- MapSector *sector = getSectorNoGenerate(p2d);
- if (sector)
- return sector;
- /*
- Do not create over max mapgen limit
- */
- if (blockpos_over_max_limit(v3s16(p2d.X, 0, p2d.Y)))
- throw InvalidPositionException("createSector(): pos over max mapgen limit");
- /*
- Generate blank sector
- */
- sector = new MapSector(this, p2d, m_gamedef);
- /*
- Insert to container
- */
- m_sectors[p2d] = sector;
- return sector;
- }
- MapBlock * ServerMap::createBlock(v3s16 p)
- {
- v2s16 p2d(p.X, p.Z);
- s16 block_y = p.Y;
- /*
- This will create or load a sector if not found in memory.
- */
- MapSector *sector;
- try {
- sector = createSector(p2d);
- } catch (InvalidPositionException &e) {
- infostream<<"createBlock: createSector() failed"<<std::endl;
- throw e;
- }
- /*
- Try to get a block from the sector
- */
- MapBlock *block = sector->getBlockNoCreateNoEx(block_y);
- if (block)
- return block;
- // Create blank
- try {
- block = sector->createBlankBlock(block_y);
- } catch (InvalidPositionException &e) {
- infostream << "createBlock: createBlankBlock() failed" << std::endl;
- throw e;
- }
- return block;
- }
- MapBlock * ServerMap::emergeBlock(v3s16 p, bool create_blank)
- {
- {
- MapBlock *block = getBlockNoCreateNoEx(p);
- if (block)
- return block;
- }
- {
- MapBlock *block = loadBlock(p);
- if(block)
- return block;
- }
- if (create_blank) {
- try {
- MapSector *sector = createSector(v2s16(p.X, p.Z));
- return sector->createBlankBlock(p.Y);
- } catch (InvalidPositionException &e) {}
- }
- return NULL;
- }
- MapBlock *ServerMap::getBlockOrEmerge(v3s16 p3d, bool generate)
- {
- MapBlock *block = getBlockNoCreateNoEx(p3d);
- if (block == NULL)
- m_emerge->enqueueBlockEmerge(PEER_ID_INEXISTENT, p3d, generate);
- return block;
- }
- bool ServerMap::isBlockInQueue(v3s16 pos)
- {
- return m_emerge && m_emerge->isBlockInQueue(pos);
- }
- void ServerMap::addNodeAndUpdate(v3s16 p, MapNode n,
- std::map<v3s16, MapBlock*> &modified_blocks,
- bool remove_metadata)
- {
- Map::addNodeAndUpdate(p, n, modified_blocks, remove_metadata);
- /*
- Add neighboring liquid nodes and this node to transform queue.
- (it's vital for the node itself to get updated last, if it was removed.)
- */
- for (const v3s16 &dir : g_7dirs) {
- v3s16 p2 = p + dir;
- bool is_valid_position;
- MapNode n2 = getNode(p2, &is_valid_position);
- if(is_valid_position &&
- (m_nodedef->get(n2).isLiquid() ||
- n2.getContent() == CONTENT_AIR))
- m_transforming_liquid.push_back(p2);
- }
- }
- // N.B. This requires no synchronization, since data will not be modified unless
- // the VoxelManipulator being updated belongs to the same thread.
- void ServerMap::updateVManip(v3s16 pos)
- {
- Mapgen *mg = m_emerge->getCurrentMapgen();
- if (!mg)
- return;
- MMVManip *vm = mg->vm;
- if (!vm)
- return;
- if (!vm->m_area.contains(pos))
- return;
- s32 idx = vm->m_area.index(pos);
- vm->m_data[idx] = getNode(pos);
- vm->m_flags[idx] &= ~VOXELFLAG_NO_DATA;
- vm->m_is_dirty = true;
- }
- void ServerMap::reportMetrics(u64 save_time_us, u32 saved_blocks, u32 all_blocks)
- {
- m_loaded_blocks_gauge->set(all_blocks);
- m_save_time_counter->increment(save_time_us);
- m_save_count_counter->increment(saved_blocks);
- }
- void ServerMap::save(ModifiedState save_level)
- {
- if (!m_map_saving_enabled) {
- warningstream<<"Not saving map, saving disabled."<<std::endl;
- return;
- }
- const auto start_time = porting::getTimeUs();
- if(save_level == MOD_STATE_CLEAN)
- infostream<<"ServerMap: Saving whole map, this can take time."
- <<std::endl;
- if (m_map_metadata_changed || save_level == MOD_STATE_CLEAN) {
- if (settings_mgr.saveMapMeta())
- m_map_metadata_changed = false;
- }
- // Profile modified reasons
- Profiler modprofiler;
- u32 block_count = 0;
- u32 block_count_all = 0; // Number of blocks in memory
- // Don't do anything with sqlite unless something is really saved
- bool save_started = false;
- for (auto §or_it : m_sectors) {
- MapSector *sector = sector_it.second;
- MapBlockVect blocks;
- sector->getBlocks(blocks);
- for (MapBlock *block : blocks) {
- block_count_all++;
- if(block->getModified() >= (u32)save_level) {
- // Lazy beginSave()
- if(!save_started) {
- beginSave();
- save_started = true;
- }
- modprofiler.add(block->getModifiedReasonString(), 1);
- saveBlock(block);
- block_count++;
- }
- }
- }
- if(save_started)
- endSave();
- /*
- Only print if something happened or saved whole map
- */
- if(save_level == MOD_STATE_CLEAN
- || block_count != 0) {
- infostream << "ServerMap: Written: "
- << block_count << " blocks"
- << ", " << block_count_all << " blocks in memory."
- << std::endl;
- PrintInfo(infostream); // ServerMap/ClientMap:
- infostream<<"Blocks modified by: "<<std::endl;
- modprofiler.print(infostream);
- }
- const auto end_time = porting::getTimeUs();
- reportMetrics(end_time - start_time, block_count, block_count_all);
- }
- void ServerMap::listAllLoadableBlocks(std::vector<v3s16> &dst)
- {
- dbase->listAllLoadableBlocks(dst);
- if (dbase_ro)
- dbase_ro->listAllLoadableBlocks(dst);
- }
- void ServerMap::listAllLoadedBlocks(std::vector<v3s16> &dst)
- {
- for (auto §or_it : m_sectors) {
- MapSector *sector = sector_it.second;
- MapBlockVect blocks;
- sector->getBlocks(blocks);
- for (MapBlock *block : blocks) {
- v3s16 p = block->getPos();
- dst.push_back(p);
- }
- }
- }
- MapDatabase *ServerMap::createDatabase(
- const std::string &name,
- const std::string &savedir,
- Settings &conf)
- {
- if (name == "sqlite3")
- return new MapDatabaseSQLite3(savedir);
- if (name == "dummy")
- return new Database_Dummy();
- #if USE_LEVELDB
- if (name == "leveldb")
- return new Database_LevelDB(savedir);
- #endif
- #if USE_REDIS
- if (name == "redis")
- return new Database_Redis(conf);
- #endif
- #if USE_POSTGRESQL
- if (name == "postgresql") {
- std::string connect_string;
- conf.getNoEx("pgsql_connection", connect_string);
- return new MapDatabasePostgreSQL(connect_string);
- }
- #endif
- throw BaseException(std::string("Database backend ") + name + " not supported.");
- }
- void ServerMap::beginSave()
- {
- dbase->beginSave();
- }
- void ServerMap::endSave()
- {
- dbase->endSave();
- }
- bool ServerMap::saveBlock(MapBlock *block)
- {
- return saveBlock(block, dbase, m_map_compression_level);
- }
- bool ServerMap::saveBlock(MapBlock *block, MapDatabase *db, int compression_level)
- {
- v3s16 p3d = block->getPos();
- // Format used for writing
- u8 version = SER_FMT_VER_HIGHEST_WRITE;
- /*
- [0] u8 serialization version
- [1] data
- */
- std::ostringstream o(std::ios_base::binary);
- o.write((char*) &version, 1);
- block->serialize(o, version, true, compression_level);
- // FIXME: zero copy possible in c++20 or with custom rdbuf
- bool ret = db->saveBlock(p3d, o.str());
- if (ret) {
- // We just wrote it to the disk so clear modified flag
- block->resetModified();
- }
- return ret;
- }
- void ServerMap::loadBlock(std::string *blob, v3s16 p3d, MapSector *sector, bool save_after_load)
- {
- try {
- std::istringstream is(*blob, std::ios_base::binary);
- u8 version = readU8(is);
- if(is.fail())
- throw SerializationError("ServerMap::loadBlock(): Failed"
- " to read MapBlock version");
- MapBlock *block = nullptr;
- std::unique_ptr<MapBlock> block_created_new;
- block = sector->getBlockNoCreateNoEx(p3d.Y);
- if (!block) {
- block_created_new = sector->createBlankBlockNoInsert(p3d.Y);
- block = block_created_new.get();
- }
- {
- ScopeProfiler sp(g_profiler, "ServerMap: deSer block", SPT_AVG, PRECISION_MICRO);
- block->deSerialize(is, version, true);
- }
- // If it's a new block, insert it to the map
- if (block_created_new) {
- sector->insertBlock(std::move(block_created_new));
- ReflowScan scanner(this, m_emerge->ndef);
- scanner.scan(block, &m_transforming_liquid);
- }
- /*
- Save blocks loaded in old format in new format
- */
- //if(version < SER_FMT_VER_HIGHEST_READ || save_after_load)
- // Only save if asked to; no need to update version
- if(save_after_load)
- saveBlock(block);
- // We just loaded it from, so it's up-to-date.
- block->resetModified();
- }
- catch(SerializationError &e)
- {
- errorstream<<"Invalid block data in database"
- <<" ("<<p3d.X<<","<<p3d.Y<<","<<p3d.Z<<")"
- <<" (SerializationError): "<<e.what()<<std::endl;
- // TODO: Block should be marked as invalid in memory so that it is
- // not touched but the game can run
- if(g_settings->getBool("ignore_world_load_errors")){
- errorstream<<"Ignoring block load error. Duck and cover! "
- <<"(ignore_world_load_errors)"<<std::endl;
- } else {
- throw SerializationError("Invalid block data in database");
- }
- }
- }
- MapBlock* ServerMap::loadBlock(v3s16 blockpos)
- {
- ScopeProfiler sp(g_profiler, "ServerMap: load block", SPT_AVG, PRECISION_MICRO);
- bool created_new = (getBlockNoCreateNoEx(blockpos) == NULL);
- v2s16 p2d(blockpos.X, blockpos.Z);
- std::string ret;
- dbase->loadBlock(blockpos, &ret);
- if (!ret.empty()) {
- loadBlock(&ret, blockpos, createSector(p2d), false);
- } else if (dbase_ro) {
- dbase_ro->loadBlock(blockpos, &ret);
- if (!ret.empty()) {
- loadBlock(&ret, blockpos, createSector(p2d), false);
- }
- } else {
- return NULL;
- }
- MapBlock *block = getBlockNoCreateNoEx(blockpos);
- if (created_new && (block != NULL)) {
- std::map<v3s16, MapBlock*> modified_blocks;
- // Fix lighting if necessary
- voxalgo::update_block_border_lighting(this, block, modified_blocks);
- if (!modified_blocks.empty()) {
- //Modified lighting, send event
- MapEditEvent event;
- event.type = MEET_OTHER;
- event.setModifiedBlocks(modified_blocks);
- dispatchEvent(event);
- }
- }
- return block;
- }
- bool ServerMap::deleteBlock(v3s16 blockpos)
- {
- if (!dbase->deleteBlock(blockpos))
- return false;
- MapBlock *block = getBlockNoCreateNoEx(blockpos);
- if (block) {
- v2s16 p2d(blockpos.X, blockpos.Z);
- MapSector *sector = getSectorNoGenerate(p2d);
- if (!sector)
- return false;
- // It may not be safe to delete the block from memory at the moment
- // (pointers to it could still be in use)
- m_detached_blocks.push_back(sector->detachBlock(block));
- }
- return true;
- }
- void ServerMap::deleteDetachedBlocks()
- {
- for (const auto &block : m_detached_blocks) {
- assert(block->isOrphan());
- (void)block; // silence unused-variable warning in release builds
- }
- m_detached_blocks.clear();
- }
- void ServerMap::step()
- {
- // Delete from memory blocks removed by deleteBlocks() only when pointers
- // to them are (probably) no longer in use
- deleteDetachedBlocks();
- }
- void ServerMap::PrintInfo(std::ostream &out)
- {
- out<<"ServerMap: ";
- }
- bool ServerMap::repairBlockLight(v3s16 blockpos,
- std::map<v3s16, MapBlock *> *modified_blocks)
- {
- MapBlock *block = emergeBlock(blockpos, false);
- if (!block || !block->isGenerated())
- return false;
- voxalgo::repair_block_light(this, block, modified_blocks);
- return true;
- }
- /*
- Liquids
- */
- #define WATER_DROP_BOOST 4
- const static v3s16 liquid_6dirs[6] = {
- // order: upper before same level before lower
- v3s16( 0, 1, 0),
- v3s16( 0, 0, 1),
- v3s16( 1, 0, 0),
- v3s16( 0, 0,-1),
- v3s16(-1, 0, 0),
- v3s16( 0,-1, 0)
- };
- enum NeighborType : u8 {
- NEIGHBOR_UPPER,
- NEIGHBOR_SAME_LEVEL,
- NEIGHBOR_LOWER
- };
- struct NodeNeighbor {
- MapNode n;
- NeighborType t;
- v3s16 p;
- NodeNeighbor()
- : n(CONTENT_AIR), t(NEIGHBOR_SAME_LEVEL)
- { }
- NodeNeighbor(const MapNode &node, NeighborType n_type, const v3s16 &pos)
- : n(node),
- t(n_type),
- p(pos)
- { }
- };
- static s8 get_max_liquid_level(NodeNeighbor nb, s8 current_max_node_level)
- {
- s8 max_node_level = current_max_node_level;
- u8 nb_liquid_level = (nb.n.param2 & LIQUID_LEVEL_MASK);
- switch (nb.t) {
- case NEIGHBOR_UPPER:
- if (nb_liquid_level + WATER_DROP_BOOST > current_max_node_level) {
- max_node_level = LIQUID_LEVEL_MAX;
- if (nb_liquid_level + WATER_DROP_BOOST < LIQUID_LEVEL_MAX)
- max_node_level = nb_liquid_level + WATER_DROP_BOOST;
- } else if (nb_liquid_level > current_max_node_level) {
- max_node_level = nb_liquid_level;
- }
- break;
- case NEIGHBOR_LOWER:
- break;
- case NEIGHBOR_SAME_LEVEL:
- if ((nb.n.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK &&
- nb_liquid_level > 0 && nb_liquid_level - 1 > max_node_level)
- max_node_level = nb_liquid_level - 1;
- break;
- }
- return max_node_level;
- }
- void ServerMap::transforming_liquid_add(v3s16 p)
- {
- m_transforming_liquid.push_back(p);
- }
- void ServerMap::transformLiquids(std::map<v3s16, MapBlock*> &modified_blocks,
- ServerEnvironment *env)
- {
- u32 loopcount = 0;
- u32 initial_size = m_transforming_liquid.size();
- /*if(initial_size != 0)
- infostream<<"transformLiquids(): initial_size="<<initial_size<<std::endl;*/
- // list of nodes that due to viscosity have not reached their max level height
- std::vector<v3s16> must_reflow;
- std::vector<std::pair<v3s16, MapNode> > changed_nodes;
- std::vector<v3s16> check_for_falling;
- u32 liquid_loop_max = g_settings->getS32("liquid_loop_max");
- u32 loop_max = liquid_loop_max;
- while (m_transforming_liquid.size() != 0)
- {
- // This should be done here so that it is done when continue is used
- if (loopcount >= initial_size || loopcount >= loop_max)
- break;
- loopcount++;
- /*
- Get a queued transforming liquid node
- */
- v3s16 p0 = m_transforming_liquid.front();
- m_transforming_liquid.pop_front();
- MapNode n0 = getNode(p0);
- /*
- Collect information about current node
- */
- s8 liquid_level = -1;
- // The liquid node which will be placed there if
- // the liquid flows into this node.
- content_t liquid_kind = CONTENT_IGNORE;
- // The node which will be placed there if liquid
- // can't flow into this node.
- content_t floodable_node = CONTENT_AIR;
- const ContentFeatures &cf = m_nodedef->get(n0);
- LiquidType liquid_type = cf.liquid_type;
- switch (liquid_type) {
- case LIQUID_SOURCE:
- liquid_level = LIQUID_LEVEL_SOURCE;
- liquid_kind = cf.liquid_alternative_flowing_id;
- break;
- case LIQUID_FLOWING:
- liquid_level = (n0.param2 & LIQUID_LEVEL_MASK);
- liquid_kind = n0.getContent();
- break;
- case LIQUID_NONE:
- // if this node is 'floodable', it *could* be transformed
- // into a liquid, otherwise, continue with the next node.
- if (!cf.floodable)
- continue;
- floodable_node = n0.getContent();
- liquid_kind = CONTENT_AIR;
- break;
- case LiquidType_END:
- break;
- }
- /*
- Collect information about the environment
- */
- NodeNeighbor sources[6]; // surrounding sources
- int num_sources = 0;
- NodeNeighbor flows[6]; // surrounding flowing liquid nodes
- int num_flows = 0;
- NodeNeighbor airs[6]; // surrounding air
- int num_airs = 0;
- NodeNeighbor neutrals[6]; // nodes that are solid or another kind of liquid
- int num_neutrals = 0;
- bool flowing_down = false;
- bool ignored_sources = false;
- bool floating_node_above = false;
- for (u16 i = 0; i < 6; i++) {
- NeighborType nt = NEIGHBOR_SAME_LEVEL;
- switch (i) {
- case 0:
- nt = NEIGHBOR_UPPER;
- break;
- case 5:
- nt = NEIGHBOR_LOWER;
- break;
- default:
- break;
- }
- v3s16 npos = p0 + liquid_6dirs[i];
- NodeNeighbor nb(getNode(npos), nt, npos);
- const ContentFeatures &cfnb = m_nodedef->get(nb.n);
- if (nt == NEIGHBOR_UPPER && cfnb.floats)
- floating_node_above = true;
- switch (cfnb.liquid_type) {
- case LIQUID_NONE:
- if (cfnb.floodable) {
- airs[num_airs++] = nb;
- // if the current node is a water source the neighbor
- // should be enqueded for transformation regardless of whether the
- // current node changes or not.
- if (nb.t != NEIGHBOR_UPPER && liquid_type != LIQUID_NONE)
- m_transforming_liquid.push_back(npos);
- // if the current node happens to be a flowing node, it will start to flow down here.
- if (nb.t == NEIGHBOR_LOWER)
- flowing_down = true;
- } else {
- neutrals[num_neutrals++] = nb;
- if (nb.n.getContent() == CONTENT_IGNORE) {
- // If node below is ignore prevent water from
- // spreading outwards and otherwise prevent from
- // flowing away as ignore node might be the source
- if (nb.t == NEIGHBOR_LOWER)
- flowing_down = true;
- else
- ignored_sources = true;
- }
- }
- break;
- case LIQUID_SOURCE:
- // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
- if (liquid_kind == CONTENT_AIR)
- liquid_kind = cfnb.liquid_alternative_flowing_id;
- if (cfnb.liquid_alternative_flowing_id != liquid_kind) {
- neutrals[num_neutrals++] = nb;
- } else {
- // Do not count bottom source, it will screw things up
- if(nt != NEIGHBOR_LOWER)
- sources[num_sources++] = nb;
- }
- break;
- case LIQUID_FLOWING:
- if (nb.t != NEIGHBOR_SAME_LEVEL ||
- (nb.n.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK) {
- // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
- // but exclude falling liquids on the same level, they cannot flow here anyway
- // used to determine if the neighbor can even flow into this node
- s8 max_level_from_neighbor = get_max_liquid_level(nb, -1);
- u8 range = m_nodedef->get(cfnb.liquid_alternative_flowing_id).liquid_range;
- if (liquid_kind == CONTENT_AIR &&
- max_level_from_neighbor >= (LIQUID_LEVEL_MAX + 1 - range))
- liquid_kind = cfnb.liquid_alternative_flowing_id;
- }
- if (cfnb.liquid_alternative_flowing_id != liquid_kind) {
- neutrals[num_neutrals++] = nb;
- } else {
- flows[num_flows++] = nb;
- if (nb.t == NEIGHBOR_LOWER)
- flowing_down = true;
- }
- break;
- case LiquidType_END:
- break;
- }
- }
- /*
- decide on the type (and possibly level) of the current node
- */
- content_t new_node_content;
- s8 new_node_level = -1;
- s8 max_node_level = -1;
- u8 range = m_nodedef->get(liquid_kind).liquid_range;
- if (range > LIQUID_LEVEL_MAX + 1)
- range = LIQUID_LEVEL_MAX + 1;
- if ((num_sources >= 2 && m_nodedef->get(liquid_kind).liquid_renewable) || liquid_type == LIQUID_SOURCE) {
- // liquid_kind will be set to either the flowing alternative of the node (if it's a liquid)
- // or the flowing alternative of the first of the surrounding sources (if it's air), so
- // it's perfectly safe to use liquid_kind here to determine the new node content.
- new_node_content = m_nodedef->get(liquid_kind).liquid_alternative_source_id;
- } else if (num_sources >= 1 && sources[0].t != NEIGHBOR_LOWER) {
- // liquid_kind is set properly, see above
- max_node_level = new_node_level = LIQUID_LEVEL_MAX;
- if (new_node_level >= (LIQUID_LEVEL_MAX + 1 - range))
- new_node_content = liquid_kind;
- else
- new_node_content = floodable_node;
- } else if (ignored_sources && liquid_level >= 0) {
- // Maybe there are neighboring sources that aren't loaded yet
- // so prevent flowing away.
- new_node_level = liquid_level;
- new_node_content = liquid_kind;
- } else {
- // no surrounding sources, so get the maximum level that can flow into this node
- for (u16 i = 0; i < num_flows; i++) {
- max_node_level = get_max_liquid_level(flows[i], max_node_level);
- }
- u8 viscosity = m_nodedef->get(liquid_kind).liquid_viscosity;
- if (viscosity > 1 && max_node_level != liquid_level) {
- // amount to gain, limited by viscosity
- // must be at least 1 in absolute value
- s8 level_inc = max_node_level - liquid_level;
- if (level_inc < -viscosity || level_inc > viscosity)
- new_node_level = liquid_level + level_inc/viscosity;
- else if (level_inc < 0)
- new_node_level = liquid_level - 1;
- else if (level_inc > 0)
- new_node_level = liquid_level + 1;
- if (new_node_level != max_node_level)
- must_reflow.push_back(p0);
- } else {
- new_node_level = max_node_level;
- }
- if (max_node_level >= (LIQUID_LEVEL_MAX + 1 - range))
- new_node_content = liquid_kind;
- else
- new_node_content = floodable_node;
- }
- /*
- check if anything has changed. if not, just continue with the next node.
- */
- if (new_node_content == n0.getContent() &&
- (m_nodedef->get(n0.getContent()).liquid_type != LIQUID_FLOWING ||
- ((n0.param2 & LIQUID_LEVEL_MASK) == (u8)new_node_level &&
- ((n0.param2 & LIQUID_FLOW_DOWN_MASK) == LIQUID_FLOW_DOWN_MASK)
- == flowing_down)))
- continue;
- /*
- check if there is a floating node above that needs to be updated.
- */
- if (floating_node_above && new_node_content == CONTENT_AIR)
- check_for_falling.push_back(p0);
- /*
- update the current node
- */
- MapNode n00 = n0;
- //bool flow_down_enabled = (flowing_down && ((n0.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK));
- if (m_nodedef->get(new_node_content).liquid_type == LIQUID_FLOWING) {
- // set level to last 3 bits, flowing down bit to 4th bit
- n0.param2 = (flowing_down ? LIQUID_FLOW_DOWN_MASK : 0x00) | (new_node_level & LIQUID_LEVEL_MASK);
- } else {
- // set the liquid level and flow bits to 0
- n0.param2 &= ~(LIQUID_LEVEL_MASK | LIQUID_FLOW_DOWN_MASK);
- }
- // change the node.
- n0.setContent(new_node_content);
- // on_flood() the node
- if (floodable_node != CONTENT_AIR) {
- if (env->getScriptIface()->node_on_flood(p0, n00, n0))
- continue;
- }
- // Ignore light (because calling voxalgo::update_lighting_nodes)
- ContentLightingFlags f0 = m_nodedef->getLightingFlags(n0);
- n0.setLight(LIGHTBANK_DAY, 0, f0);
- n0.setLight(LIGHTBANK_NIGHT, 0, f0);
- // Find out whether there is a suspect for this action
- std::string suspect;
- if (m_gamedef->rollback())
- suspect = m_gamedef->rollback()->getSuspect(p0, 83, 1);
- if (m_gamedef->rollback() && !suspect.empty()) {
- // Blame suspect
- RollbackScopeActor rollback_scope(m_gamedef->rollback(), suspect, true);
- // Get old node for rollback
- RollbackNode rollback_oldnode(this, p0, m_gamedef);
- // Set node
- setNode(p0, n0);
- // Report
- RollbackNode rollback_newnode(this, p0, m_gamedef);
- RollbackAction action;
- action.setSetNode(p0, rollback_oldnode, rollback_newnode);
- m_gamedef->rollback()->reportAction(action);
- } else {
- // Set node
- setNode(p0, n0);
- }
- v3s16 blockpos = getNodeBlockPos(p0);
- MapBlock *block = getBlockNoCreateNoEx(blockpos);
- if (block != NULL) {
- modified_blocks[blockpos] = block;
- changed_nodes.emplace_back(p0, n00);
- }
- /*
- enqueue neighbors for update if necessary
- */
- switch (m_nodedef->get(n0.getContent()).liquid_type) {
- case LIQUID_SOURCE:
- case LIQUID_FLOWING:
- // make sure source flows into all neighboring nodes
- for (u16 i = 0; i < num_flows; i++)
- if (flows[i].t != NEIGHBOR_UPPER)
- m_transforming_liquid.push_back(flows[i].p);
- for (u16 i = 0; i < num_airs; i++)
- if (airs[i].t != NEIGHBOR_UPPER)
- m_transforming_liquid.push_back(airs[i].p);
- break;
- case LIQUID_NONE:
- // this flow has turned to air; neighboring flows might need to do the same
- for (u16 i = 0; i < num_flows; i++)
- m_transforming_liquid.push_back(flows[i].p);
- break;
- case LiquidType_END:
- break;
- }
- }
- //infostream<<"Map::transformLiquids(): loopcount="<<loopcount<<std::endl;
- for (const auto &iter : must_reflow)
- m_transforming_liquid.push_back(iter);
- voxalgo::update_lighting_nodes(this, changed_nodes, modified_blocks);
- for (const v3s16 &p : check_for_falling) {
- env->getScriptIface()->check_for_falling(p);
- }
- env->getScriptIface()->on_liquid_transformed(changed_nodes);
- /* ----------------------------------------------------------------------
- * Manage the queue so that it does not grow indefinitely
- */
- u16 time_until_purge = g_settings->getU16("liquid_queue_purge_time");
- if (time_until_purge == 0)
- return; // Feature disabled
- time_until_purge *= 1000; // seconds -> milliseconds
- u64 curr_time = porting::getTimeMs();
- u32 prev_unprocessed = m_unprocessed_count;
- m_unprocessed_count = m_transforming_liquid.size();
- // if unprocessed block count is decreasing or stable
- if (m_unprocessed_count <= prev_unprocessed) {
- m_queue_size_timer_started = false;
- } else {
- if (!m_queue_size_timer_started)
- m_inc_trending_up_start_time = curr_time;
- m_queue_size_timer_started = true;
- }
- // Account for curr_time overflowing
- if (m_queue_size_timer_started && m_inc_trending_up_start_time > curr_time)
- m_queue_size_timer_started = false;
- /* If the queue has been growing for more than liquid_queue_purge_time seconds
- * and the number of unprocessed blocks is still > liquid_loop_max then we
- * cannot keep up; dump the oldest blocks from the queue so that the queue
- * has liquid_loop_max items in it
- */
- if (m_queue_size_timer_started
- && curr_time - m_inc_trending_up_start_time > time_until_purge
- && m_unprocessed_count > liquid_loop_max) {
- size_t dump_qty = m_unprocessed_count - liquid_loop_max;
- infostream << "transformLiquids(): DUMPING " << dump_qty
- << " blocks from the queue" << std::endl;
- while (dump_qty--)
- m_transforming_liquid.pop_front();
- m_queue_size_timer_started = false; // optimistically assume we can keep up now
- m_unprocessed_count = m_transforming_liquid.size();
- }
- }
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