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 "util/numeric.h"
36 class ServerEnvironment;
37 class ActiveBlockModifier;
39 class ServerActiveObject;
41 class ServerScripting;
44 {Active, Loading} block modifier interface.
46 These are fed into ServerEnvironment at initialization time;
47 ServerEnvironment handles deleting them.
50 class ActiveBlockModifier
53 ActiveBlockModifier() = default;
54 virtual ~ActiveBlockModifier() = default;
56 // Set of contents to trigger on
57 virtual const std::vector<std::string> &getTriggerContents() const = 0;
58 // Set of required neighbors (trigger doesn't happen if none are found)
59 // Empty = do not check neighbors
60 virtual const std::vector<std::string> &getRequiredNeighbors() const = 0;
61 // Trigger interval in seconds
62 virtual float getTriggerInterval() = 0;
63 // Random chance of (1 / return value), 0 is disallowed
64 virtual u32 getTriggerChance() = 0;
65 // Whether to modify chance to simulate time lost by an unnattended block
66 virtual bool getSimpleCatchUp() = 0;
67 // This is called usually at interval for 1/chance of the nodes
68 virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n){};
69 virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
70 u32 active_object_count, u32 active_object_count_wider){};
75 ActiveBlockModifier *abm;
78 ABMWithState(ActiveBlockModifier *abm_);
81 struct LoadingBlockModifierDef
83 // Set of contents to trigger on
84 std::set<std::string> trigger_contents;
86 bool run_at_every_load = false;
88 virtual ~LoadingBlockModifierDef() = default;
90 virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n){};
93 struct LBMContentMapping
95 typedef std::unordered_map<content_t, std::vector<LoadingBlockModifierDef *>> lbm_map;
98 std::vector<LoadingBlockModifierDef *> lbm_list;
100 // Needs to be separate method (not inside destructor),
101 // because the LBMContentMapping may be copied and destructed
102 // many times during operation in the lbm_lookup_map.
103 void deleteContents();
104 void addLBM(LoadingBlockModifierDef *lbm_def, IGameDef *gamedef);
105 const std::vector<LoadingBlockModifierDef *> *lookup(content_t c) const;
111 LBMManager() = default;
114 // Don't call this after loadIntroductionTimes() ran.
115 void addLBMDef(LoadingBlockModifierDef *lbm_def);
117 void loadIntroductionTimes(const std::string ×,
118 IGameDef *gamedef, u32 now);
120 // Don't call this before loadIntroductionTimes() ran.
121 std::string createIntroductionTimesString();
123 // Don't call this before loadIntroductionTimes() ran.
124 void applyLBMs(ServerEnvironment *env, MapBlock *block, u32 stamp);
126 // Warning: do not make this std::unordered_map, order is relevant here
127 typedef std::map<u32, LBMContentMapping> lbm_lookup_map;
130 // Once we set this to true, we can only query,
132 bool m_query_mode = false;
134 // For m_query_mode == false:
135 // The key of the map is the LBM def's name.
136 // TODO make this std::unordered_map
137 std::map<std::string, LoadingBlockModifierDef *> m_lbm_defs;
139 // For m_query_mode == true:
140 // The key of the map is the LBM def's first introduction time.
141 lbm_lookup_map m_lbm_lookup;
143 // Returns an iterator to the LBMs that were introduced
144 // after the given time. This is guaranteed to return
145 // valid values for everything
146 lbm_lookup_map::const_iterator getLBMsIntroducedAfter(u32 time)
147 { return m_lbm_lookup.lower_bound(time); }
151 List of active blocks, used by ServerEnvironment
154 class ActiveBlockList
157 void update(std::vector<v3s16> &active_positions,
159 std::set<v3s16> &blocks_removed,
160 std::set<v3s16> &blocks_added);
162 bool contains(v3s16 p){
163 return (m_list.find(p) != m_list.end());
170 std::set<v3s16> m_list;
171 std::set<v3s16> m_forceloaded_list;
177 Operation mode for ServerEnvironment::clearObjects()
179 enum ClearObjectsMode {
180 // Load and go through every mapblock, clearing objects
181 CLEAR_OBJECTS_MODE_FULL,
183 // Clear objects immediately in loaded mapblocks;
184 // clear objects in unloaded mapblocks only when the mapblocks are next activated.
185 CLEAR_OBJECTS_MODE_QUICK,
189 The server-side environment.
191 This is not thread-safe. Server uses an environment mutex.
194 typedef std::unordered_map<u16, ServerActiveObject *> ServerActiveObjectMap;
196 class ServerEnvironment : public Environment
199 ServerEnvironment(ServerMap *map, ServerScripting *scriptIface,
200 Server *server, const std::string &path_world);
201 ~ServerEnvironment();
205 ServerMap & getServerMap();
207 //TODO find way to remove this fct!
208 ServerScripting* getScriptIface()
214 float getSendRecommendedInterval()
215 { return m_recommended_send_interval; }
217 void kickAllPlayers(AccessDeniedCode reason,
218 const std::string &str_reason, bool reconnect);
220 void saveLoadedPlayers();
221 void savePlayer(RemotePlayer *player);
222 PlayerSAO *loadPlayer(RemotePlayer *player, bool *new_player, u16 peer_id,
223 bool is_singleplayer);
224 void addPlayer(RemotePlayer *player);
225 void removePlayer(RemotePlayer *player);
226 bool removePlayerFromDatabase(const std::string &name);
229 Save and load time of day and game timer
233 // to be called instead of loadMeta if
234 // env_meta.txt doesn't exist (e.g. new world)
235 void loadDefaultMeta();
237 u32 addParticleSpawner(float exptime);
238 u32 addParticleSpawner(float exptime, u16 attached_id);
239 void deleteParticleSpawner(u32 id, bool remove_from_object = true);
242 External ActiveObject interface
243 -------------------------------------------
246 ServerActiveObject* getActiveObject(u16 id);
249 Add an active object to the environment.
250 Environment handles deletion of object.
251 Object may be deleted by environment immediately.
252 If id of object is 0, assigns a free id to it.
253 Returns the id of the object.
254 Returns 0 if not added and thus deleted.
256 u16 addActiveObject(ServerActiveObject *object);
259 Add an active object as a static object to the corresponding
261 Caller allocates memory, ServerEnvironment frees memory.
262 Return value: true if succeeded, false if failed.
263 (note: not used, pending removal from engine)
265 //bool addActiveObjectAsStatic(ServerActiveObject *object);
268 Find out what new objects have been added to
269 inside a radius around a position
271 void getAddedActiveObjects(PlayerSAO *playersao, s16 radius,
273 std::set<u16> ¤t_objects,
274 std::queue<u16> &added_objects);
277 Find out what new objects have been removed from
278 inside a radius around a position
280 void getRemovedActiveObjects(PlayerSAO *playersao, s16 radius,
282 std::set<u16> ¤t_objects,
283 std::queue<u16> &removed_objects);
286 Get the next message emitted by some active object.
287 Returns a message with id=0 if no messages are available.
289 ActiveObjectMessage getActiveObjectMessage();
291 virtual void getSelectedActiveObjects(
292 const core::line3d<f32> &shootline_on_map,
293 std::vector<PointedThing> &objects
297 Activate objects and dynamically modify for the dtime determined
298 from timestamp and additional_dtime
300 void activateBlock(MapBlock *block, u32 additional_dtime=0);
303 {Active,Loading}BlockModifiers
304 -------------------------------------------
307 void addActiveBlockModifier(ActiveBlockModifier *abm);
308 void addLoadingBlockModifierDef(LoadingBlockModifierDef *lbm);
312 -------------------------------------------
315 // Script-aware node setters
316 bool setNode(v3s16 p, const MapNode &n);
317 bool removeNode(v3s16 p);
318 bool swapNode(v3s16 p, const MapNode &n);
320 // Find all active objects inside a radius around a point
321 void getObjectsInsideRadius(std::vector<u16> &objects, v3f pos, float radius);
323 // Clear objects, loading and going through every MapBlock
324 void clearObjects(ClearObjectsMode mode);
326 // This makes stuff happen
327 void step(f32 dtime);
329 //check if there's a line of sight between two positions
330 bool line_of_sight(v3f pos1, v3f pos2, float stepsize=1.0, v3s16 *p=NULL);
332 u32 getGameTime() const { return m_game_time; }
334 void reportMaxLagEstimate(float f) { m_max_lag_estimate = f; }
335 float getMaxLagEstimate() { return m_max_lag_estimate; }
337 std::set<v3s16>* getForceloadedBlocks() { return &m_active_blocks.m_forceloaded_list; };
339 // Sets the static object status all the active objects in the specified block
340 // This is only really needed for deleting blocks from the map
341 void setStaticForActiveObjectsInBlock(v3s16 blockpos,
342 bool static_exists, v3s16 static_block=v3s16(0,0,0));
344 RemotePlayer *getPlayer(const u16 peer_id);
345 RemotePlayer *getPlayer(const char* name);
346 u32 getPlayerCount() const { return m_players.size(); }
348 static bool migratePlayersDatabase(const GameParams &game_params,
349 const Settings &cmd_args);
352 static PlayerDatabase *openPlayerDatabase(const std::string &name,
353 const std::string &savedir, const Settings &conf);
355 Internal ActiveObject interface
356 -------------------------------------------
360 Add an active object to the environment.
362 Called by addActiveObject.
364 Object may be deleted by environment immediately.
365 If id of object is 0, assigns a free id to it.
366 Returns the id of the object.
367 Returns 0 if not added and thus deleted.
369 u16 addActiveObjectRaw(ServerActiveObject *object, bool set_changed, u32 dtime_s);
372 Remove all objects that satisfy (isGone() && m_known_by_count==0)
374 void removeRemovedObjects();
377 Convert stored objects from block to active
379 void activateObjects(MapBlock *block, u32 dtime_s);
382 Convert objects that are not in active blocks to static.
384 If m_known_by_count != 0, active object is not deleted, but static
385 data is still updated.
387 If force_delete is set, active object is deleted nevertheless. It
388 shall only be set so in the destructor of the environment.
390 void deactivateFarObjects(bool force_delete);
393 A few helpers used by the three above methods
395 void deleteStaticFromBlock(
396 ServerActiveObject *obj, u16 id, u32 mod_reason, bool no_emerge);
397 bool saveStaticToBlock(v3s16 blockpos, u16 store_id,
398 ServerActiveObject *obj, const StaticObject &s_obj, u32 mod_reason);
407 ServerScripting* m_script;
411 const std::string m_path_world;
412 // Active object list
413 ServerActiveObjectMap m_active_objects;
414 // Outgoing network message buffer for active objects
415 std::queue<ActiveObjectMessage> m_active_object_messages;
417 float m_send_recommended_timer = 0.0f;
418 IntervalLimiter m_object_management_interval;
419 // List of active blocks
420 ActiveBlockList m_active_blocks;
421 IntervalLimiter m_active_blocks_management_interval;
422 IntervalLimiter m_active_block_modifier_interval;
423 IntervalLimiter m_active_blocks_nodemetadata_interval;
424 int m_active_block_interval_overload_skip = 0;
425 // Time from the beginning of the game in seconds.
426 // Incremented in step().
428 // A helper variable for incrementing the latter
429 float m_game_time_fraction_counter = 0.0f;
430 // Time of last clearObjects call (game time).
431 // When a mapblock older than this is loaded, its objects are cleared.
432 u32 m_last_clear_objects_time = 0;
433 // Active block modifiers
434 std::vector<ABMWithState> m_abms;
435 LBMManager m_lbm_mgr;
436 // An interval for generally sending object positions and stuff
437 float m_recommended_send_interval = 0.1f;
438 // Estimate for general maximum lag as determined by server.
439 // Can raise to high values like 15s with eg. map generation mods.
440 float m_max_lag_estimate = 0.1f;
442 // peer_ids in here should be unique, except that there may be many 0s
443 std::vector<RemotePlayer*> m_players;
445 PlayerDatabase *m_player_database = nullptr;
448 IntervalLimiter m_particle_management_interval;
449 std::unordered_map<u32, float> m_particle_spawners;
450 std::unordered_map<u32, u16> m_particle_spawner_attachments;