3 Copyright (C) 2010-2017 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "activeobject.h"
23 #include "environment.h"
26 #include "server/activeobjectmgr.h"
27 #include "util/numeric.h"
28 #include "util/metricsbackend.h"
38 class ServerEnvironment;
39 class ActiveBlockModifier;
41 class ServerActiveObject;
43 class ServerScripting;
46 {Active, Loading} block modifier interface.
48 These are fed into ServerEnvironment at initialization time;
49 ServerEnvironment handles deleting them.
52 class ActiveBlockModifier
55 ActiveBlockModifier() = default;
56 virtual ~ActiveBlockModifier() = default;
58 // Set of contents to trigger on
59 virtual const std::vector<std::string> &getTriggerContents() const = 0;
60 // Set of required neighbors (trigger doesn't happen if none are found)
61 // Empty = do not check neighbors
62 virtual const std::vector<std::string> &getRequiredNeighbors() const = 0;
63 // Trigger interval in seconds
64 virtual float getTriggerInterval() = 0;
65 // Random chance of (1 / return value), 0 is disallowed
66 virtual u32 getTriggerChance() = 0;
67 // Whether to modify chance to simulate time lost by an unnattended block
68 virtual bool getSimpleCatchUp() = 0;
69 // get min Y for apply abm
70 virtual s16 getMinY() = 0;
71 // get max Y for apply abm
72 virtual s16 getMaxY() = 0;
73 // This is called usually at interval for 1/chance of the nodes
74 virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n){};
75 virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
76 u32 active_object_count, u32 active_object_count_wider){};
81 ActiveBlockModifier *abm;
84 ABMWithState(ActiveBlockModifier *abm_);
87 struct LoadingBlockModifierDef
89 // Set of contents to trigger on
90 std::set<std::string> trigger_contents;
92 bool run_at_every_load = false;
94 virtual ~LoadingBlockModifierDef() = default;
96 virtual void trigger(ServerEnvironment *env, v3s16 p,
97 MapNode n, float dtime_s) {};
100 struct LBMContentMapping
102 typedef std::unordered_map<content_t, std::vector<LoadingBlockModifierDef *>> lbm_map;
105 std::vector<LoadingBlockModifierDef *> lbm_list;
107 // Needs to be separate method (not inside destructor),
108 // because the LBMContentMapping may be copied and destructed
109 // many times during operation in the lbm_lookup_map.
110 void deleteContents();
111 void addLBM(LoadingBlockModifierDef *lbm_def, IGameDef *gamedef);
112 const std::vector<LoadingBlockModifierDef *> *lookup(content_t c) const;
118 LBMManager() = default;
121 // Don't call this after loadIntroductionTimes() ran.
122 void addLBMDef(LoadingBlockModifierDef *lbm_def);
124 void loadIntroductionTimes(const std::string ×,
125 IGameDef *gamedef, u32 now);
127 // Don't call this before loadIntroductionTimes() ran.
128 std::string createIntroductionTimesString();
130 // Don't call this before loadIntroductionTimes() ran.
131 void applyLBMs(ServerEnvironment *env, MapBlock *block,
132 u32 stamp, float dtime_s);
134 // Warning: do not make this std::unordered_map, order is relevant here
135 typedef std::map<u32, LBMContentMapping> lbm_lookup_map;
138 // Once we set this to true, we can only query,
140 bool m_query_mode = false;
142 // For m_query_mode == false:
143 // The key of the map is the LBM def's name.
144 // TODO make this std::unordered_map
145 std::map<std::string, LoadingBlockModifierDef *> m_lbm_defs;
147 // For m_query_mode == true:
148 // The key of the map is the LBM def's first introduction time.
149 lbm_lookup_map m_lbm_lookup;
151 // Returns an iterator to the LBMs that were introduced
152 // after the given time. This is guaranteed to return
153 // valid values for everything
154 lbm_lookup_map::const_iterator getLBMsIntroducedAfter(u32 time)
155 { return m_lbm_lookup.lower_bound(time); }
159 List of active blocks, used by ServerEnvironment
162 class ActiveBlockList
165 void update(std::vector<PlayerSAO*> &active_players,
166 s16 active_block_range,
167 s16 active_object_range,
168 std::set<v3s16> &blocks_removed,
169 std::set<v3s16> &blocks_added);
171 bool contains(v3s16 p) const {
172 return (m_list.find(p) != m_list.end());
176 return m_list.size();
183 void remove(v3s16 p) {
188 std::set<v3s16> m_list;
189 std::set<v3s16> m_abm_list;
190 // list of blocks that are always active, not modified by this class
191 std::set<v3s16> m_forceloaded_list;
195 ServerEnvironment::m_on_mapblocks_changed_receiver
197 struct OnMapblocksChangedReceiver : public MapEventReceiver {
198 std::unordered_set<v3s16> modified_blocks;
199 bool receiving = false;
201 void onMapEditEvent(const MapEditEvent &event) override;
205 Operation mode for ServerEnvironment::clearObjects()
207 enum ClearObjectsMode {
208 // Load and go through every mapblock, clearing objects
209 CLEAR_OBJECTS_MODE_FULL,
211 // Clear objects immediately in loaded mapblocks;
212 // clear objects in unloaded mapblocks only when the mapblocks are next activated.
213 CLEAR_OBJECTS_MODE_QUICK,
216 class ServerEnvironment final : public Environment
219 ServerEnvironment(ServerMap *map, ServerScripting *script_iface,
220 Server *server, const std::string &path_world, MetricsBackend *mb);
221 ~ServerEnvironment();
227 ServerMap & getServerMap();
229 //TODO find way to remove this fct!
230 ServerScripting* getScriptIface()
236 float getSendRecommendedInterval()
237 { return m_recommended_send_interval; }
239 void kickAllPlayers(AccessDeniedCode reason,
240 const std::string &str_reason, bool reconnect);
242 void saveLoadedPlayers(bool force = false);
243 void savePlayer(RemotePlayer *player);
244 PlayerSAO *loadPlayer(RemotePlayer *player, bool *new_player, session_t peer_id,
245 bool is_singleplayer);
246 void addPlayer(RemotePlayer *player);
247 void removePlayer(RemotePlayer *player);
248 bool removePlayerFromDatabase(const std::string &name);
251 Save and load time of day and game timer
256 u32 addParticleSpawner(float exptime);
257 u32 addParticleSpawner(float exptime, u16 attached_id);
258 void deleteParticleSpawner(u32 id, bool remove_from_object = true);
261 External ActiveObject interface
262 -------------------------------------------
265 ServerActiveObject* getActiveObject(u16 id)
267 return m_ao_manager.getActiveObject(id);
271 Add an active object to the environment.
272 Environment handles deletion of object.
273 Object may be deleted by environment immediately.
274 If id of object is 0, assigns a free id to it.
275 Returns the id of the object.
276 Returns 0 if not added and thus deleted.
278 u16 addActiveObject(ServerActiveObject *object);
281 Add an active object as a static object to the corresponding
283 Caller allocates memory, ServerEnvironment frees memory.
284 Return value: true if succeeded, false if failed.
285 (note: not used, pending removal from engine)
287 //bool addActiveObjectAsStatic(ServerActiveObject *object);
290 Find out what new objects have been added to
291 inside a radius around a position
293 void getAddedActiveObjects(PlayerSAO *playersao, s16 radius,
295 std::set<u16> ¤t_objects,
296 std::queue<u16> &added_objects);
299 Find out what new objects have been removed from
300 inside a radius around a position
302 void getRemovedActiveObjects(PlayerSAO *playersao, s16 radius,
304 std::set<u16> ¤t_objects,
305 std::queue<u16> &removed_objects);
308 Get the next message emitted by some active object.
309 Returns false if no messages are available, true otherwise.
311 bool getActiveObjectMessage(ActiveObjectMessage *dest);
313 virtual void getSelectedActiveObjects(
314 const core::line3d<f32> &shootline_on_map,
315 std::vector<PointedThing> &objects
319 Activate objects and dynamically modify for the dtime determined
320 from timestamp and additional_dtime
322 void activateBlock(MapBlock *block, u32 additional_dtime=0);
325 {Active,Loading}BlockModifiers
326 -------------------------------------------
329 void addActiveBlockModifier(ActiveBlockModifier *abm);
330 void addLoadingBlockModifierDef(LoadingBlockModifierDef *lbm);
334 -------------------------------------------
337 // Script-aware node setters
338 bool setNode(v3s16 p, const MapNode &n);
339 bool removeNode(v3s16 p);
340 bool swapNode(v3s16 p, const MapNode &n);
342 // Find the daylight value at pos with a Depth First Search
343 u8 findSunlight(v3s16 pos) const;
345 // Find all active objects inside a radius around a point
346 void getObjectsInsideRadius(std::vector<ServerActiveObject *> &objects, const v3f &pos, float radius,
347 std::function<bool(ServerActiveObject *obj)> include_obj_cb)
349 return m_ao_manager.getObjectsInsideRadius(pos, radius, objects, include_obj_cb);
352 // Find all active objects inside a box
353 void getObjectsInArea(std::vector<ServerActiveObject *> &objects, const aabb3f &box,
354 std::function<bool(ServerActiveObject *obj)> include_obj_cb)
356 return m_ao_manager.getObjectsInArea(box, objects, include_obj_cb);
359 // Clear objects, loading and going through every MapBlock
360 void clearObjects(ClearObjectsMode mode);
362 // This makes stuff happen
363 void step(f32 dtime);
365 u32 getGameTime() const { return m_game_time; }
367 void reportMaxLagEstimate(float f) { m_max_lag_estimate = f; }
368 float getMaxLagEstimate() { return m_max_lag_estimate; }
370 std::set<v3s16>* getForceloadedBlocks() { return &m_active_blocks.m_forceloaded_list; }
372 // Sorted by how ready a mapblock is
377 BS_ACTIVE // always highest value
379 BlockStatus getBlockStatus(v3s16 blockpos);
381 // Sets the static object status all the active objects in the specified block
382 // This is only really needed for deleting blocks from the map
383 void setStaticForActiveObjectsInBlock(v3s16 blockpos,
384 bool static_exists, v3s16 static_block=v3s16(0,0,0));
386 RemotePlayer *getPlayer(const session_t peer_id);
387 RemotePlayer *getPlayer(const char* name);
388 const std::vector<RemotePlayer *> getPlayers() const { return m_players; }
389 u32 getPlayerCount() const { return m_players.size(); }
391 static bool migratePlayersDatabase(const GameParams &game_params,
392 const Settings &cmd_args);
394 AuthDatabase *getAuthDatabase() { return m_auth_database; }
395 static bool migrateAuthDatabase(const GameParams &game_params,
396 const Settings &cmd_args);
400 * called if env_meta.txt doesn't exist (e.g. new world)
402 void loadDefaultMeta();
404 static PlayerDatabase *openPlayerDatabase(const std::string &name,
405 const std::string &savedir, const Settings &conf);
406 static AuthDatabase *openAuthDatabase(const std::string &name,
407 const std::string &savedir, const Settings &conf);
409 Internal ActiveObject interface
410 -------------------------------------------
414 Add an active object to the environment.
416 Called by addActiveObject.
418 Object may be deleted by environment immediately.
419 If id of object is 0, assigns a free id to it.
420 Returns the id of the object.
421 Returns 0 if not added and thus deleted.
423 u16 addActiveObjectRaw(ServerActiveObject *object, bool set_changed, u32 dtime_s);
426 Remove all objects that satisfy (isGone() && m_known_by_count==0)
428 void removeRemovedObjects();
431 Convert stored objects from block to active
433 void activateObjects(MapBlock *block, u32 dtime_s);
436 Convert objects that are not in active blocks to static.
438 If m_known_by_count != 0, active object is not deleted, but static
439 data is still updated.
441 If force_delete is set, active object is deleted nevertheless. It
442 shall only be set so in the destructor of the environment.
444 void deactivateFarObjects(bool force_delete);
447 A few helpers used by the three above methods
449 void deleteStaticFromBlock(
450 ServerActiveObject *obj, u16 id, u32 mod_reason, bool no_emerge);
451 bool saveStaticToBlock(v3s16 blockpos, u16 store_id,
452 ServerActiveObject *obj, const StaticObject &s_obj, u32 mod_reason);
461 ServerScripting* m_script;
464 // Active Object Manager
465 server::ActiveObjectMgr m_ao_manager;
466 // on_mapblocks_changed map event receiver
467 OnMapblocksChangedReceiver m_on_mapblocks_changed_receiver;
469 const std::string m_path_world;
470 // Outgoing network message buffer for active objects
471 std::queue<ActiveObjectMessage> m_active_object_messages;
473 float m_send_recommended_timer = 0.0f;
474 IntervalLimiter m_object_management_interval;
475 // List of active blocks
476 ActiveBlockList m_active_blocks;
477 int m_fast_active_block_divider = 1;
478 IntervalLimiter m_active_blocks_mgmt_interval;
479 IntervalLimiter m_active_block_modifier_interval;
480 IntervalLimiter m_active_blocks_nodemetadata_interval;
481 // Whether the variables below have been read from file yet
482 bool m_meta_loaded = false;
483 // Time from the beginning of the game in seconds.
484 // Incremented in step().
486 // A helper variable for incrementing the latter
487 float m_game_time_fraction_counter = 0.0f;
488 // Time of last clearObjects call (game time).
489 // When a mapblock older than this is loaded, its objects are cleared.
490 u32 m_last_clear_objects_time = 0;
491 // Active block modifiers
492 std::vector<ABMWithState> m_abms;
493 LBMManager m_lbm_mgr;
494 // An interval for generally sending object positions and stuff
495 float m_recommended_send_interval = 0.1f;
496 // Estimate for general maximum lag as determined by server.
497 // Can raise to high values like 15s with eg. map generation mods.
498 float m_max_lag_estimate = 0.1f;
500 // peer_ids in here should be unique, except that there may be many 0s
501 std::vector<RemotePlayer*> m_players;
503 PlayerDatabase *m_player_database = nullptr;
504 AuthDatabase *m_auth_database = nullptr;
506 // Pseudo random generator for shuffling, etc.
510 IntervalLimiter m_particle_management_interval;
511 std::unordered_map<u32, float> m_particle_spawners;
512 std::unordered_map<u32, u16> m_particle_spawner_attachments;
514 // Environment metrics
515 MetricCounterPtr m_step_time_counter;
516 MetricGaugePtr m_active_block_gauge;
517 MetricGaugePtr m_active_object_gauge;
519 ServerActiveObject* createSAO(ActiveObjectType type, v3f pos, const std::string &data);