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serverenvironment.cpp
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serverenvironment.cpp
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/*
Minetest
Copyright (C) 2010-2017 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 "serverenvironment.h"
#include "content_sao.h"
#include "settings.h"
#include "log.h"
#include "mapblock.h"
#include "nodedef.h"
#include "nodemetadata.h"
#include "gamedef.h"
#include "map.h"
#include "porting.h"
#include "profiler.h"
#include "raycast.h"
#include "remoteplayer.h"
#include "scripting_server.h"
#include "server.h"
#include "util/serialize.h"
#include "util/basic_macros.h"
#include "util/pointedthing.h"
#include "threading/mutex_auto_lock.h"
#include "filesys.h"
#include "gameparams.h"
#include "database/database-dummy.h"
#include "database/database-files.h"
#include "database/database-sqlite3.h"
#if USE_POSTGRESQL
#include "database/database-postgresql.h"
#endif
#include <algorithm>
#define LBM_NAME_ALLOWED_CHARS "abcdefghijklmnopqrstuvwxyz0123456789_:"
// A number that is much smaller than the timeout for particle spawners should/could ever be
#define PARTICLE_SPAWNER_NO_EXPIRY -1024.f
/*
ABMWithState
*/
ABMWithState::ABMWithState(ActiveBlockModifier *abm_):
abm(abm_)
{
// Initialize timer to random value to spread processing
float itv = abm->getTriggerInterval();
itv = MYMAX(0.001, itv); // No less than 1ms
int minval = MYMAX(-0.51*itv, -60); // Clamp to
int maxval = MYMIN(0.51*itv, 60); // +-60 seconds
timer = myrand_range(minval, maxval);
}
/*
LBMManager
*/
void LBMContentMapping::deleteContents()
{
for (auto &it : lbm_list) {
delete it;
}
}
void LBMContentMapping::addLBM(LoadingBlockModifierDef *lbm_def, IGameDef *gamedef)
{
// Add the lbm_def to the LBMContentMapping.
// Unknown names get added to the global NameIdMapping.
const NodeDefManager *nodedef = gamedef->ndef();
lbm_list.push_back(lbm_def);
for (const std::string &nodeTrigger: lbm_def->trigger_contents) {
std::vector<content_t> c_ids;
bool found = nodedef->getIds(nodeTrigger, c_ids);
if (!found) {
content_t c_id = gamedef->allocateUnknownNodeId(nodeTrigger);
if (c_id == CONTENT_IGNORE) {
// Seems it can't be allocated.
warningstream << "Could not internalize node name \"" << nodeTrigger
<< "\" while loading LBM \"" << lbm_def->name << "\"." << std::endl;
continue;
}
c_ids.push_back(c_id);
}
for (content_t c_id : c_ids) {
map[c_id].push_back(lbm_def);
}
}
}
const std::vector<LoadingBlockModifierDef *> *
LBMContentMapping::lookup(content_t c) const
{
lbm_map::const_iterator it = map.find(c);
if (it == map.end())
return NULL;
// This first dereferences the iterator, returning
// a std::vector<LoadingBlockModifierDef *>
// reference, then we convert it to a pointer.
return &(it->second);
}
LBMManager::~LBMManager()
{
for (auto &m_lbm_def : m_lbm_defs) {
delete m_lbm_def.second;
}
for (auto &it : m_lbm_lookup) {
(it.second).deleteContents();
}
}
void LBMManager::addLBMDef(LoadingBlockModifierDef *lbm_def)
{
// Precondition, in query mode the map isn't used anymore
FATAL_ERROR_IF(m_query_mode,
"attempted to modify LBMManager in query mode");
if (!string_allowed(lbm_def->name, LBM_NAME_ALLOWED_CHARS)) {
throw ModError("Error adding LBM \"" + lbm_def->name +
"\": Does not follow naming conventions: "
"Only characters [a-z0-9_:] are allowed.");
}
m_lbm_defs[lbm_def->name] = lbm_def;
}
void LBMManager::loadIntroductionTimes(const std::string ×,
IGameDef *gamedef, u32 now)
{
m_query_mode = true;
// name -> time map.
// Storing it in a map first instead of
// handling the stuff directly in the loop
// removes all duplicate entries.
// TODO make this std::unordered_map
std::map<std::string, u32> introduction_times;
/*
The introduction times string consists of name~time entries,
with each entry terminated by a semicolon. The time is decimal.
*/
size_t idx = 0;
size_t idx_new;
while ((idx_new = times.find(';', idx)) != std::string::npos) {
std::string entry = times.substr(idx, idx_new - idx);
std::vector<std::string> components = str_split(entry, '~');
if (components.size() != 2)
throw SerializationError("Introduction times entry \""
+ entry + "\" requires exactly one '~'!");
const std::string &name = components[0];
u32 time = from_string<u32>(components[1]);
introduction_times[name] = time;
idx = idx_new + 1;
}
// Put stuff from introduction_times into m_lbm_lookup
for (std::map<std::string, u32>::const_iterator it = introduction_times.begin();
it != introduction_times.end(); ++it) {
const std::string &name = it->first;
u32 time = it->second;
std::map<std::string, LoadingBlockModifierDef *>::iterator def_it =
m_lbm_defs.find(name);
if (def_it == m_lbm_defs.end()) {
// This seems to be an LBM entry for
// an LBM we haven't loaded. Discard it.
continue;
}
LoadingBlockModifierDef *lbm_def = def_it->second;
if (lbm_def->run_at_every_load) {
// This seems to be an LBM entry for
// an LBM that runs at every load.
// Don't add it just yet.
continue;
}
m_lbm_lookup[time].addLBM(lbm_def, gamedef);
// Erase the entry so that we know later
// what elements didn't get put into m_lbm_lookup
m_lbm_defs.erase(name);
}
// Now also add the elements from m_lbm_defs to m_lbm_lookup
// that weren't added in the previous step.
// They are introduced first time to this world,
// or are run at every load (introducement time hardcoded to U32_MAX).
LBMContentMapping &lbms_we_introduce_now = m_lbm_lookup[now];
LBMContentMapping &lbms_running_always = m_lbm_lookup[U32_MAX];
for (auto &m_lbm_def : m_lbm_defs) {
if (m_lbm_def.second->run_at_every_load) {
lbms_running_always.addLBM(m_lbm_def.second, gamedef);
} else {
lbms_we_introduce_now.addLBM(m_lbm_def.second, gamedef);
}
}
// Clear the list, so that we don't delete remaining elements
// twice in the destructor
m_lbm_defs.clear();
}
std::string LBMManager::createIntroductionTimesString()
{
// Precondition, we must be in query mode
FATAL_ERROR_IF(!m_query_mode,
"attempted to query on non fully set up LBMManager");
std::ostringstream oss;
for (const auto &it : m_lbm_lookup) {
u32 time = it.first;
const std::vector<LoadingBlockModifierDef *> &lbm_list = it.second.lbm_list;
for (const auto &lbm_def : lbm_list) {
// Don't add if the LBM runs at every load,
// then introducement time is hardcoded
// and doesn't need to be stored
if (lbm_def->run_at_every_load)
continue;
oss << lbm_def->name << "~" << time << ";";
}
}
return oss.str();
}
void LBMManager::applyLBMs(ServerEnvironment *env, MapBlock *block, u32 stamp)
{
// Precondition, we need m_lbm_lookup to be initialized
FATAL_ERROR_IF(!m_query_mode,
"attempted to query on non fully set up LBMManager");
v3s16 pos_of_block = block->getPosRelative();
v3s16 pos;
MapNode n;
content_t c;
lbm_lookup_map::const_iterator it = getLBMsIntroducedAfter(stamp);
for (; it != m_lbm_lookup.end(); ++it) {
// Cache previous version to speedup lookup which has a very high performance
// penalty on each call
content_t previous_c{};
std::vector<LoadingBlockModifierDef *> *lbm_list = nullptr;
for (pos.X = 0; pos.X < MAP_BLOCKSIZE; pos.X++)
for (pos.Y = 0; pos.Y < MAP_BLOCKSIZE; pos.Y++)
for (pos.Z = 0; pos.Z < MAP_BLOCKSIZE; pos.Z++) {
n = block->getNodeNoEx(pos);
c = n.getContent();
// If content_t are not matching perform an LBM lookup
if (previous_c != c) {
lbm_list = (std::vector<LoadingBlockModifierDef *> *)
it->second.lookup(c);
previous_c = c;
}
if (!lbm_list)
continue;
for (auto lbmdef : *lbm_list) {
lbmdef->trigger(env, pos + pos_of_block, n);
}
}
}
}
/*
ActiveBlockList
*/
void fillRadiusBlock(v3s16 p0, s16 r, std::set<v3s16> &list)
{
v3s16 p;
for(p.X=p0.X-r; p.X<=p0.X+r; p.X++)
for(p.Y=p0.Y-r; p.Y<=p0.Y+r; p.Y++)
for(p.Z=p0.Z-r; p.Z<=p0.Z+r; p.Z++)
{
// limit to a sphere
if (p.getDistanceFrom(p0) <= r) {
// Set in list
list.insert(p);
}
}
}
void fillViewConeBlock(v3s16 p0,
const s16 r,
const v3f camera_pos,
const v3f camera_dir,
const float camera_fov,
std::set<v3s16> &list)
{
v3s16 p;
const s16 r_nodes = r * BS * MAP_BLOCKSIZE;
for (p.X = p0.X - r; p.X <= p0.X+r; p.X++)
for (p.Y = p0.Y - r; p.Y <= p0.Y+r; p.Y++)
for (p.Z = p0.Z - r; p.Z <= p0.Z+r; p.Z++) {
if (isBlockInSight(p, camera_pos, camera_dir, camera_fov, r_nodes)) {
list.insert(p);
}
}
}
void ActiveBlockList::update(std::vector<PlayerSAO*> &active_players,
s16 active_block_range,
s16 active_object_range,
std::set<v3s16> &blocks_removed,
std::set<v3s16> &blocks_added)
{
/*
Create the new list
*/
std::set<v3s16> newlist = m_forceloaded_list;
m_abm_list = m_forceloaded_list;
for (const PlayerSAO *playersao : active_players) {
v3s16 pos = getNodeBlockPos(floatToInt(playersao->getBasePosition(), BS));
fillRadiusBlock(pos, active_block_range, m_abm_list);
fillRadiusBlock(pos, active_block_range, newlist);
s16 player_ao_range = std::min(active_object_range, playersao->getWantedRange());
// only do this if this would add blocks
if (player_ao_range > active_block_range) {
v3f camera_dir = v3f(0,0,1);
camera_dir.rotateYZBy(playersao->getLookPitch());
camera_dir.rotateXZBy(playersao->getRotation().Y);
fillViewConeBlock(pos,
player_ao_range,
playersao->getEyePosition(),
camera_dir,
playersao->getFov(),
newlist);
}
}
/*
Find out which blocks on the old list are not on the new list
*/
// Go through old list
for (v3s16 p : m_list) {
// If not on new list, it's been removed
if (newlist.find(p) == newlist.end())
blocks_removed.insert(p);
}
/*
Find out which blocks on the new list are not on the old list
*/
// Go through new list
for (v3s16 p : newlist) {
// If not on old list, it's been added
if(m_list.find(p) == m_list.end())
blocks_added.insert(p);
}
/*
Update m_list
*/
m_list.clear();
for (v3s16 p : newlist) {
m_list.insert(p);
}
}
/*
ServerEnvironment
*/
ServerEnvironment::ServerEnvironment(ServerMap *map,
ServerScripting *scriptIface, Server *server,
const std::string &path_world):
Environment(server),
m_map(map),
m_script(scriptIface),
m_server(server),
m_path_world(path_world)
{
// Determine which database backend to use
std::string conf_path = path_world + DIR_DELIM + "world.mt";
Settings conf;
std::string player_backend_name = "sqlite3";
std::string auth_backend_name = "sqlite3";
bool succeeded = conf.readConfigFile(conf_path.c_str());
// If we open world.mt read the backend configurations.
if (succeeded) {
// Read those values before setting defaults
bool player_backend_exists = conf.exists("player_backend");
bool auth_backend_exists = conf.exists("auth_backend");
// player backend is not set, assume it's legacy file backend.
if (!player_backend_exists) {
// fall back to files
conf.set("player_backend", "files");
player_backend_name = "files";
if (!conf.updateConfigFile(conf_path.c_str())) {
errorstream << "ServerEnvironment::ServerEnvironment(): "
<< "Failed to update world.mt!" << std::endl;
}
} else {
conf.getNoEx("player_backend", player_backend_name);
}
// auth backend is not set, assume it's legacy file backend.
if (!auth_backend_exists) {
conf.set("auth_backend", "files");
auth_backend_name = "files";
if (!conf.updateConfigFile(conf_path.c_str())) {
errorstream << "ServerEnvironment::ServerEnvironment(): "
<< "Failed to update world.mt!" << std::endl;
}
} else {
conf.getNoEx("auth_backend", auth_backend_name);
}
}
if (player_backend_name == "files") {
warningstream << "/!\\ You are using old player file backend. "
<< "This backend is deprecated and will be removed in a future release /!\\"
<< std::endl << "Switching to SQLite3 or PostgreSQL is advised, "
<< "please read http://wiki.minetest.net/Database_backends." << std::endl;
}
if (auth_backend_name == "files") {
warningstream << "/!\\ You are using old auth file backend. "
<< "This backend is deprecated and will be removed in a future release /!\\"
<< std::endl << "Switching to SQLite3 is advised, "
<< "please read http://wiki.minetest.net/Database_backends." << std::endl;
}
m_player_database = openPlayerDatabase(player_backend_name, path_world, conf);
m_auth_database = openAuthDatabase(auth_backend_name, path_world, conf);
}
ServerEnvironment::~ServerEnvironment()
{
// Clear active block list.
// This makes the next one delete all active objects.
m_active_blocks.clear();
// Convert all objects to static and delete the active objects
deactivateFarObjects(true);
// Drop/delete map
m_map->drop();
// Delete ActiveBlockModifiers
for (ABMWithState &m_abm : m_abms) {
delete m_abm.abm;
}
// Deallocate players
for (RemotePlayer *m_player : m_players) {
delete m_player;
}
delete m_player_database;
delete m_auth_database;
}
Map & ServerEnvironment::getMap()
{
return *m_map;
}
ServerMap & ServerEnvironment::getServerMap()
{
return *m_map;
}
RemotePlayer *ServerEnvironment::getPlayer(const session_t peer_id)
{
for (RemotePlayer *player : m_players) {
if (player->getPeerId() == peer_id)
return player;
}
return NULL;
}
RemotePlayer *ServerEnvironment::getPlayer(const char* name)
{
for (RemotePlayer *player : m_players) {
if (strcmp(player->getName(), name) == 0)
return player;
}
return NULL;
}
void ServerEnvironment::addPlayer(RemotePlayer *player)
{
/*
Check that peer_ids are unique.
Also check that names are unique.
Exception: there can be multiple players with peer_id=0
*/
// If peer id is non-zero, it has to be unique.
if (player->getPeerId() != PEER_ID_INEXISTENT)
FATAL_ERROR_IF(getPlayer(player->getPeerId()) != NULL, "Peer id not unique");
// Name has to be unique.
FATAL_ERROR_IF(getPlayer(player->getName()) != NULL, "Player name not unique");
// Add.
m_players.push_back(player);
}
void ServerEnvironment::removePlayer(RemotePlayer *player)
{
for (std::vector<RemotePlayer *>::iterator it = m_players.begin();
it != m_players.end(); ++it) {
if ((*it) == player) {
delete *it;
m_players.erase(it);
return;
}
}
}
bool ServerEnvironment::removePlayerFromDatabase(const std::string &name)
{
return m_player_database->removePlayer(name);
}
bool ServerEnvironment::line_of_sight(v3f pos1, v3f pos2, v3s16 *p)
{
// Iterate trough nodes on the line
voxalgo::VoxelLineIterator iterator(pos1 / BS, (pos2 - pos1) / BS);
do {
MapNode n = getMap().getNodeNoEx(iterator.m_current_node_pos);
// Return non-air
if (n.param0 != CONTENT_AIR) {
if (p)
*p = iterator.m_current_node_pos;
return false;
}
iterator.next();
} while (iterator.m_current_index <= iterator.m_last_index);
return true;
}
void ServerEnvironment::kickAllPlayers(AccessDeniedCode reason,
const std::string &str_reason, bool reconnect)
{
for (RemotePlayer *player : m_players) {
m_server->DenyAccessVerCompliant(player->getPeerId(),
player->protocol_version, reason, str_reason, reconnect);
}
}
void ServerEnvironment::saveLoadedPlayers()
{
for (RemotePlayer *player : m_players) {
if (player->checkModified() || (player->getPlayerSAO() &&
player->getPlayerSAO()->getMeta().isModified())) {
try {
m_player_database->savePlayer(player);
} catch (DatabaseException &e) {
errorstream << "Failed to save player " << player->getName() << " exception: "
<< e.what() << std::endl;
throw;
}
}
}
}
void ServerEnvironment::savePlayer(RemotePlayer *player)
{
try {
m_player_database->savePlayer(player);
} catch (DatabaseException &e) {
errorstream << "Failed to save player " << player->getName() << " exception: "
<< e.what() << std::endl;
throw;
}
}
PlayerSAO *ServerEnvironment::loadPlayer(RemotePlayer *player, bool *new_player,
session_t peer_id, bool is_singleplayer)
{
PlayerSAO *playersao = new PlayerSAO(this, player, peer_id, is_singleplayer);
// Create player if it doesn't exist
if (!m_player_database->loadPlayer(player, playersao)) {
*new_player = true;
// Set player position
infostream << "Server: Finding spawn place for player \""
<< player->getName() << "\"" << std::endl;
playersao->setBasePosition(m_server->findSpawnPos());
// Make sure the player is saved
player->setModified(true);
} else {
// If the player exists, ensure that they respawn inside legal bounds
// This fixes an assert crash when the player can't be added
// to the environment
if (objectpos_over_limit(playersao->getBasePosition())) {
actionstream << "Respawn position for player \""
<< player->getName() << "\" outside limits, resetting" << std::endl;
playersao->setBasePosition(m_server->findSpawnPos());
}
}
// Add player to environment
addPlayer(player);
/* Clean up old HUD elements from previous sessions */
player->clearHud();
/* Add object to environment */
addActiveObject(playersao);
return playersao;
}
void ServerEnvironment::saveMeta()
{
std::string path = m_path_world + DIR_DELIM "env_meta.txt";
// Open file and serialize
std::ostringstream ss(std::ios_base::binary);
Settings args;
args.setU64("game_time", m_game_time);
args.setU64("time_of_day", getTimeOfDay());
args.setU64("last_clear_objects_time", m_last_clear_objects_time);
args.setU64("lbm_introduction_times_version", 1);
args.set("lbm_introduction_times",
m_lbm_mgr.createIntroductionTimesString());
args.setU64("day_count", m_day_count);
args.writeLines(ss);
ss<<"EnvArgsEnd\n";
if(!fs::safeWriteToFile(path, ss.str()))
{
infostream<<"ServerEnvironment::saveMeta(): Failed to write "
<<path<<std::endl;
throw SerializationError("Couldn't save env meta");
}
}
void ServerEnvironment::loadMeta()
{
// If file doesn't exist, load default environment metadata
if (!fs::PathExists(m_path_world + DIR_DELIM "env_meta.txt")) {
infostream << "ServerEnvironment: Loading default environment metadata"
<< std::endl;
loadDefaultMeta();
return;
}
infostream << "ServerEnvironment: Loading environment metadata" << std::endl;
std::string path = m_path_world + DIR_DELIM "env_meta.txt";
// Open file and deserialize
std::ifstream is(path.c_str(), std::ios_base::binary);
if (!is.good()) {
infostream << "ServerEnvironment::loadMeta(): Failed to open "
<< path << std::endl;
throw SerializationError("Couldn't load env meta");
}
Settings args;
if (!args.parseConfigLines(is, "EnvArgsEnd")) {
throw SerializationError("ServerEnvironment::loadMeta(): "
"EnvArgsEnd not found!");
}
try {
m_game_time = args.getU64("game_time");
} catch (SettingNotFoundException &e) {
// Getting this is crucial, otherwise timestamps are useless
throw SerializationError("Couldn't load env meta game_time");
}
setTimeOfDay(args.exists("time_of_day") ?
// set day to early morning by default
args.getU64("time_of_day") : 5250);
m_last_clear_objects_time = args.exists("last_clear_objects_time") ?
// If missing, do as if clearObjects was never called
args.getU64("last_clear_objects_time") : 0;
std::string lbm_introduction_times;
try {
u64 ver = args.getU64("lbm_introduction_times_version");
if (ver == 1) {
lbm_introduction_times = args.get("lbm_introduction_times");
} else {
infostream << "ServerEnvironment::loadMeta(): Non-supported"
<< " introduction time version " << ver << std::endl;
}
} catch (SettingNotFoundException &e) {
// No problem, this is expected. Just continue with an empty string
}
m_lbm_mgr.loadIntroductionTimes(lbm_introduction_times, m_server, m_game_time);
m_day_count = args.exists("day_count") ?
args.getU64("day_count") : 0;
}
/**
* called if env_meta.txt doesn't exist (e.g. new world)
*/
void ServerEnvironment::loadDefaultMeta()
{
m_lbm_mgr.loadIntroductionTimes("", m_server, m_game_time);
}
struct ActiveABM
{
ActiveBlockModifier *abm;
int chance;
std::vector<content_t> required_neighbors;
bool check_required_neighbors; // false if required_neighbors is known to be empty
};
class ABMHandler
{
private:
ServerEnvironment *m_env;
std::vector<std::vector<ActiveABM> *> m_aabms;
public:
ABMHandler(std::vector<ABMWithState> &abms,
float dtime_s, ServerEnvironment *env,
bool use_timers):
m_env(env)
{
if(dtime_s < 0.001)
return;
const NodeDefManager *ndef = env->getGameDef()->ndef();
for (ABMWithState &abmws : abms) {
ActiveBlockModifier *abm = abmws.abm;
float trigger_interval = abm->getTriggerInterval();
if(trigger_interval < 0.001)
trigger_interval = 0.001;
float actual_interval = dtime_s;
if(use_timers){
abmws.timer += dtime_s;
if(abmws.timer < trigger_interval)
continue;
abmws.timer -= trigger_interval;
actual_interval = trigger_interval;
}
float chance = abm->getTriggerChance();
if(chance == 0)
chance = 1;
ActiveABM aabm;
aabm.abm = abm;
if (abm->getSimpleCatchUp()) {
float intervals = actual_interval / trigger_interval;
if(intervals == 0)
continue;
aabm.chance = chance / intervals;
if(aabm.chance == 0)
aabm.chance = 1;
} else {
aabm.chance = chance;
}
// Trigger neighbors
const std::vector<std::string> &required_neighbors_s =
abm->getRequiredNeighbors();
for (const std::string &required_neighbor_s : required_neighbors_s) {
ndef->getIds(required_neighbor_s, aabm.required_neighbors);
}
aabm.check_required_neighbors = !required_neighbors_s.empty();
// Trigger contents
const std::vector<std::string> &contents_s = abm->getTriggerContents();
for (const std::string &content_s : contents_s) {
std::vector<content_t> ids;
ndef->getIds(content_s, ids);
for (content_t c : ids) {
if (c >= m_aabms.size())
m_aabms.resize(c + 256, NULL);
if (!m_aabms[c])
m_aabms[c] = new std::vector<ActiveABM>;
m_aabms[c]->push_back(aabm);
}
}
}
}
~ABMHandler()
{
for (auto &aabms : m_aabms)
delete aabms;
}
// Find out how many objects the given block and its neighbours contain.
// Returns the number of objects in the block, and also in 'wider' the
// number of objects in the block and all its neighbours. The latter
// may an estimate if any neighbours are unloaded.
u32 countObjects(MapBlock *block, ServerMap * map, u32 &wider)
{
wider = 0;
u32 wider_unknown_count = 0;
for(s16 x=-1; x<=1; x++)
for(s16 y=-1; y<=1; y++)
for(s16 z=-1; z<=1; z++)
{
MapBlock *block2 = map->getBlockNoCreateNoEx(
block->getPos() + v3s16(x,y,z));
if(block2==NULL){
wider_unknown_count++;
continue;
}
wider += block2->m_static_objects.m_active.size()
+ block2->m_static_objects.m_stored.size();
}
// Extrapolate
u32 active_object_count = block->m_static_objects.m_active.size();
u32 wider_known_count = 3*3*3 - wider_unknown_count;
wider += wider_unknown_count * wider / wider_known_count;
return active_object_count;
}
void apply(MapBlock *block, int &blocks_scanned, int &abms_run, int &blocks_cached)
{
if(m_aabms.empty() || block->isDummy())
return;
// Check the content type cache first
// to see whether there are any ABMs
// to be run at all for this block.
if (block->contents_cached) {
blocks_cached++;
bool run_abms = false;
for (content_t c : block->contents) {
if (c < m_aabms.size() && m_aabms[c]) {
run_abms = true;
break;
}
}
if (!run_abms)
return;
} else {
// Clear any caching
block->contents.clear();
}
blocks_scanned++;
ServerMap *map = &m_env->getServerMap();
u32 active_object_count_wider;
u32 active_object_count = this->countObjects(block, map, active_object_count_wider);
m_env->m_added_objects = 0;
v3s16 p0;
for(p0.X=0; p0.X<MAP_BLOCKSIZE; p0.X++)
for(p0.Y=0; p0.Y<MAP_BLOCKSIZE; p0.Y++)
for(p0.Z=0; p0.Z<MAP_BLOCKSIZE; p0.Z++)
{
const MapNode &n = block->getNodeUnsafe(p0);
content_t c = n.getContent();
// Cache content types as we go
if (!block->contents_cached && !block->do_not_cache_contents) {
block->contents.insert(c);
if (block->contents.size() > 64) {
// Too many different nodes... don't try to cache
block->do_not_cache_contents = true;
block->contents.clear();
}
}
if (c >= m_aabms.size() || !m_aabms[c])
continue;
v3s16 p = p0 + block->getPosRelative();
for (ActiveABM &aabm : *m_aabms[c]) {
if (myrand() % aabm.chance != 0)
continue;
// Check neighbors
if (aabm.check_required_neighbors) {
v3s16 p1;
for(p1.X = p0.X-1; p1.X <= p0.X+1; p1.X++)
for(p1.Y = p0.Y-1; p1.Y <= p0.Y+1; p1.Y++)
for(p1.Z = p0.Z-1; p1.Z <= p0.Z+1; p1.Z++)
{
if(p1 == p0)
continue;
content_t c;
if (block->isValidPosition(p1)) {
// if the neighbor is found on the same map block
// get it straight from there
const MapNode &n = block->getNodeUnsafe(p1);
c = n.getContent();
} else {
// otherwise consult the map
MapNode n = map->getNodeNoEx(p1 + block->getPosRelative());
c = n.getContent();
}
if (CONTAINS(aabm.required_neighbors, c))
goto neighbor_found;
}
// No required neighbor found
continue;
}
neighbor_found:
abms_run++;
// Call all the trigger variations
aabm.abm->trigger(m_env, p, n);
aabm.abm->trigger(m_env, p, n,
active_object_count, active_object_count_wider);
// Count surrounding objects again if the abms added any
if(m_env->m_added_objects > 0) {
active_object_count = countObjects(block, map, active_object_count_wider);
m_env->m_added_objects = 0;
}
}
}
block->contents_cached = !block->do_not_cache_contents;
}
};
void ServerEnvironment::activateBlock(MapBlock *block, u32 additional_dtime)
{
// Reset usage timer immediately, otherwise a block that becomes active
// again at around the same time as it would normally be unloaded will
// get unloaded incorrectly. (I think this still leaves a small possibility
// of a race condition between this and server::AsyncRunStep, which only
// some kind of synchronisation will fix, but it at least reduces the window
// of opportunity for it to break from seconds to nanoseconds)
block->resetUsageTimer();
// Get time difference
u32 dtime_s = 0;
u32 stamp = block->getTimestamp();
if (m_game_time > stamp && stamp != BLOCK_TIMESTAMP_UNDEFINED)
dtime_s = m_game_time - stamp;
dtime_s += additional_dtime;
/*infostream<<"ServerEnvironment::activateBlock(): block timestamp: "
<<stamp<<", game time: "<<m_game_time<<std::endl;*/
// Remove stored static objects if clearObjects was called since block's timestamp
if (stamp == BLOCK_TIMESTAMP_UNDEFINED || stamp < m_last_clear_objects_time) {
block->m_static_objects.m_stored.clear();
// do not set changed flag to avoid unnecessary mapblock writes
}
// Set current time as timestamp
block->setTimestampNoChangedFlag(m_game_time);
/*infostream<<"ServerEnvironment::activateBlock(): block is "
<<dtime_s<<" seconds old."<<std::endl;*/
// Activate stored objects
activateObjects(block, dtime_s);
/* Handle LoadingBlockModifiers */
m_lbm_mgr.applyLBMs(this, block, stamp);
// Run node timers
std::vector<NodeTimer> elapsed_timers =
block->m_node_timers.step((float)dtime_s);
if (!elapsed_timers.empty()) {
MapNode n;
for (const NodeTimer &elapsed_timer : elapsed_timers) {
n = block->getNodeNoEx(elapsed_timer.position);
v3s16 p = elapsed_timer.position + block->getPosRelative();
if (m_script->node_on_timer(p, n, elapsed_timer.elapsed))
block->setNodeTimer(NodeTimer(elapsed_timer.timeout, 0,
elapsed_timer.position));
}
}
}
void ServerEnvironment::addActiveBlockModifier(ActiveBlockModifier *abm)
{
m_abms.emplace_back(abm);
}
void ServerEnvironment::addLoadingBlockModifierDef(LoadingBlockModifierDef *lbm)
{