summaryrefslogtreecommitdiff
path: root/src/environment.h
blob: 9e282476fd82a34399c10f06ac6d0e2cf7b4d462 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
/*
Minetest
Copyright (C) 2010-2013 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.
*/

#ifndef ENVIRONMENT_HEADER
#define ENVIRONMENT_HEADER

/*
	This class is the game's environment.
	It contains:
	- The map
	- Players
	- Other objects
	- The current time in the game
	- etc.
*/

#include <set>
#include <list>
#include <map>
#include "irr_v3d.h"
#include "activeobject.h"
#include "util/numeric.h"
#include "mapnode.h"
#include "mapblock.h"

class ServerEnvironment;
class ActiveBlockModifier;
class ServerActiveObject;
class ITextureSource;
class IGameDef;
class Map;
class ServerMap;
class ClientMap;
class GameScripting;
class Player;

class Environment
{
public:
	// Environment will delete the map passed to the constructor
	Environment();
	virtual ~Environment();

	/*
		Step everything in environment.
		- Move players
		- Step mobs
		- Run timers of map
	*/
	virtual void step(f32 dtime) = 0;

	virtual Map & getMap() = 0;

	virtual void addPlayer(Player *player);
	void removePlayer(u16 peer_id);
	Player * getPlayer(u16 peer_id);
	Player * getPlayer(const char *name);
	Player * getRandomConnectedPlayer();
	Player * getNearestConnectedPlayer(v3f pos);
	std::list<Player*> getPlayers();
	std::list<Player*> getPlayers(bool ignore_disconnected);
	
	u32 getDayNightRatio();

	// 0-23999
	virtual void setTimeOfDay(u32 time)
	{
		m_time_of_day = time;
		m_time_of_day_f = (float)time / 24000.0;
	}

	u32 getTimeOfDay()
	{ return m_time_of_day; }

	float getTimeOfDayF()
	{ return m_time_of_day_f; }

	void stepTimeOfDay(float dtime);

	void setTimeOfDaySpeed(float speed)
	{ m_time_of_day_speed = speed; }
	
	float getTimeOfDaySpeed()
	{ return m_time_of_day_speed; }

	void setDayNightRatioOverride(bool enable, u32 value)
	{
		m_enable_day_night_ratio_override = enable;
		m_day_night_ratio_override = value;
	}

protected:
	// peer_ids in here should be unique, except that there may be many 0s
	std::list<Player*> m_players;
	// Time of day in milli-hours (0-23999); determines day and night
	u32 m_time_of_day;
	// Time of day in 0...1
	float m_time_of_day_f;
	float m_time_of_day_speed;
	// Used to buffer dtime for adding to m_time_of_day
	float m_time_counter;
	// Overriding the day-night ratio is useful for custom sky visuals
	bool m_enable_day_night_ratio_override;
	u32 m_day_night_ratio_override;
};

/*
	Active block modifier interface.

	These are fed into ServerEnvironment at initialization time;
	ServerEnvironment handles deleting them.
*/

class ActiveBlockModifier
{
public:
	ActiveBlockModifier(){};
	virtual ~ActiveBlockModifier(){};
	
	// Set of contents to trigger on
	virtual std::set<std::string> getTriggerContents()=0;
	// Set of required neighbors (trigger doesn't happen if none are found)
	// Empty = do not check neighbors
	virtual std::set<std::string> getRequiredNeighbors()
	{ return std::set<std::string>(); }
	// Trigger interval in seconds
	virtual float getTriggerInterval() = 0;
	// Random chance of (1 / return value), 0 is disallowed
	virtual u32 getTriggerChance() = 0;
	// This is called usually at interval for 1/chance of the nodes
	virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n){};
	virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
			u32 active_object_count, u32 active_object_count_wider){};
};

struct ABMWithState
{
	ActiveBlockModifier *abm;
	float timer;

	ABMWithState(ActiveBlockModifier *abm_);
};

/*
	List of active blocks, used by ServerEnvironment
*/

class ActiveBlockList
{
public:
	void update(std::list<v3s16> &active_positions,
			s16 radius,
			std::set<v3s16> &blocks_removed,
			std::set<v3s16> &blocks_added);

	bool contains(v3s16 p){
		return (m_list.find(p) != m_list.end());
	}

	void clear(){
		m_list.clear();
	}

	std::set<v3s16> m_list;
	std::set<v3s16> m_forceloaded_list;

private:
};

/*
	The server-side environment.

	This is not thread-safe. Server uses an environment mutex.
*/

class ServerEnvironment : public Environment
{
public:
	ServerEnvironment(ServerMap *map, GameScripting *scriptIface,
			IGameDef *gamedef);
	~ServerEnvironment();

	Map & getMap();

	ServerMap & getServerMap();

	//TODO find way to remove this fct!
	GameScripting* getScriptIface()
		{ return m_script; }

	IGameDef *getGameDef()
		{ return m_gamedef; }

	float getSendRecommendedInterval()
		{ return m_recommended_send_interval; }

	/*
		Save players
	*/
	void serializePlayers(const std::string &savedir);
	void deSerializePlayers(const std::string &savedir);

	/*
		Save and load time of day and game timer
	*/
	void saveMeta(const std::string &savedir);
	void loadMeta(const std::string &savedir);

	/*
		External ActiveObject interface
		-------------------------------------------
	*/

	ServerActiveObject* getActiveObject(u16 id);

	/*
		Add an active object to the environment.
		Environment handles deletion of object.
		Object may be deleted by environment immediately.
		If id of object is 0, assigns a free id to it.
		Returns the id of the object.
		Returns 0 if not added and thus deleted.
	*/
	u16 addActiveObject(ServerActiveObject *object);
	
	/*
		Add an active object as a static object to the corresponding
		MapBlock.
		Caller allocates memory, ServerEnvironment frees memory.
		Return value: true if succeeded, false if failed.
		(note:  not used, pending removal from engine)
	*/
	//bool addActiveObjectAsStatic(ServerActiveObject *object);
	
	/*
		Find out what new objects have been added to
		inside a radius around a position
	*/
	void getAddedActiveObjects(v3s16 pos, s16 radius,
			std::set<u16> &current_objects,
			std::set<u16> &added_objects);

	/*
		Find out what new objects have been removed from
		inside a radius around a position
	*/
	void getRemovedActiveObjects(v3s16 pos, s16 radius,
			std::set<u16> &current_objects,
			std::set<u16> &removed_objects);
	
	/*
		Get the next message emitted by some active object.
		Returns a message with id=0 if no messages are available.
	*/
	ActiveObjectMessage getActiveObjectMessage();

	/*
		Activate objects and dynamically modify for the dtime determined
		from timestamp and additional_dtime
	*/
	void activateBlock(MapBlock *block, u32 additional_dtime=0);

	/*
		ActiveBlockModifiers
		-------------------------------------------
	*/

	void addActiveBlockModifier(ActiveBlockModifier *abm);

	/*
		Other stuff
		-------------------------------------------
	*/

	// Script-aware node setters
	bool setNode(v3s16 p, const MapNode &n);
	bool removeNode(v3s16 p);
	bool swapNode(v3s16 p, const MapNode &n);
	
	// Find all active objects inside a radius around a point
	std::set<u16> getObjectsInsideRadius(v3f pos, float radius);
	
	// Clear all objects, loading and going through every MapBlock
	void clearAllObjects();
	
	// This makes stuff happen
	void step(f32 dtime);
	
	//check if there's a line of sight between two positions
	bool line_of_sight(v3f pos1, v3f pos2, float stepsize=1.0, v3s16 *p=NULL);

	u32 getGameTime() { return m_game_time; }

	void reportMaxLagEstimate(float f) { m_max_lag_estimate = f; }
	float getMaxLagEstimate() { return m_max_lag_estimate; }
	
	// is weather active in this environment?
	bool m_use_weather;
	
	std::set<v3s16>* getForceloadedBlocks() { return &m_active_blocks.m_forceloaded_list; };
	
private:

	/*
		Internal ActiveObject interface
		-------------------------------------------
	*/

	/*
		Add an active object to the environment.

		Called by addActiveObject.

		Object may be deleted by environment immediately.
		If id of object is 0, assigns a free id to it.
		Returns the id of the object.
		Returns 0 if not added and thus deleted.
	*/
	u16 addActiveObjectRaw(ServerActiveObject *object, bool set_changed, u32 dtime_s);
	
	/*
		Remove all objects that satisfy (m_removed && m_known_by_count==0)
	*/
	void removeRemovedObjects();
	
	/*
		Convert stored objects from block to active
	*/
	void activateObjects(MapBlock *block, u32 dtime_s);
	
	/*
		Convert objects that are not in active blocks to static.

		If m_known_by_count != 0, active object is not deleted, but static
		data is still updated.

		If force_delete is set, active object is deleted nevertheless. It
		shall only be set so in the destructor of the environment.
	*/
	void deactivateFarObjects(bool force_delete);

	/*
		Member variables
	*/
	
	// The map
	ServerMap *m_map;
	// Lua state
	GameScripting* m_script;
	// Game definition
	IGameDef *m_gamedef;
	// Active object list
	std::map<u16, ServerActiveObject*> m_active_objects;
	// Outgoing network message buffer for active objects
	std::list<ActiveObjectMessage> m_active_object_messages;
	// Some timers
	float m_random_spawn_timer; // used for experimental code
	float m_send_recommended_timer;
	IntervalLimiter m_object_management_interval;
	// List of active blocks
	ActiveBlockList m_active_blocks;
	IntervalLimiter m_active_blocks_management_interval;
	IntervalLimiter m_active_block_modifier_interval;
	IntervalLimiter m_active_blocks_nodemetadata_interval;
	int m_active_block_interval_overload_skip;
	// Time from the beginning of the game in seconds.
	// Incremented in step().
	u32 m_game_time;
	// A helper variable for incrementing the latter
	float m_game_time_fraction_counter;
	std::list<ABMWithState> m_abms;
	// An interval for generally sending object positions and stuff
	float m_recommended_send_interval;
	// Estimate for general maximum lag as determined by server.
	// Can raise to high values like 15s with eg. map generation mods.
	float m_max_lag_estimate;
};

#ifndef SERVER

#include "clientobject.h"
class ClientSimpleObject;

/*
	The client-side environment.

	This is not thread-safe.
	Must be called from main (irrlicht) thread (uses the SceneManager)
	Client uses an environment mutex.
*/

enum ClientEnvEventType
{
	CEE_NONE,
	CEE_PLAYER_DAMAGE,
	CEE_PLAYER_BREATH
};

struct ClientEnvEvent
{
	ClientEnvEventType type;
	union {
		struct{
		} none;
		struct{
			u8 amount;
			bool send_to_server;
		} player_damage;
		struct{
			u16 amount;
		} player_breath;
	};
};

class ClientEnvironment : public Environment
{
public:
	ClientEnvironment(ClientMap *map, scene::ISceneManager *smgr,
			ITextureSource *texturesource, IGameDef *gamedef,
			IrrlichtDevice *device);
	~ClientEnvironment();

	Map & getMap();
	ClientMap & getClientMap();

	IGameDef *getGameDef()
	{ return m_gamedef; }

	void step(f32 dtime);

	virtual void addPlayer(Player *player);
	LocalPlayer * getLocalPlayer();
	
	/*
		ClientSimpleObjects
	*/

	void addSimpleObject(ClientSimpleObject *simple);

	/*
		ActiveObjects
	*/
	
	ClientActiveObject* getActiveObject(u16 id);

	/*
		Adds an active object to the environment.
		Environment handles deletion of object.
		Object may be deleted by environment immediately.
		If id of object is 0, assigns a free id to it.
		Returns the id of the object.
		Returns 0 if not added and thus deleted.
	*/
	u16 addActiveObject(ClientActiveObject *object);

	void addActiveObject(u16 id, u8 type, const std::string &init_data);
	void removeActiveObject(u16 id);

	void processActiveObjectMessage(u16 id, const std::string &data);

	/*
		Callbacks for activeobjects
	*/

	void damageLocalPlayer(u8 damage, bool handle_hp=true);
	void updateLocalPlayerBreath(u16 breath);

	/*
		Client likes to call these
	*/
	
	// Get all nearby objects
	void getActiveObjects(v3f origin, f32 max_d,
			std::vector<DistanceSortedActiveObject> &dest);
	
	// Get event from queue. CEE_NONE is returned if queue is empty.
	ClientEnvEvent getClientEvent();

	std::vector<core::vector2d<int> > attachment_list; // X is child ID, Y is parent ID

	std::list<std::string> getPlayerNames()
	{ return m_player_names; }
	void addPlayerName(std::string name)
	{ m_player_names.push_back(name); }
	void removePlayerName(std::string name)
	{ m_player_names.remove(name); }
	
private:
	ClientMap *m_map;
	scene::ISceneManager *m_smgr;
	ITextureSource *m_texturesource;
	IGameDef *m_gamedef;
	IrrlichtDevice *m_irr;
	std::map<u16, ClientActiveObject*> m_active_objects;
	std::list<ClientSimpleObject*> m_simple_objects;
	std::list<ClientEnvEvent> m_client_event_queue;
	IntervalLimiter m_active_object_light_update_interval;
	IntervalLimiter m_lava_hurt_interval;
	IntervalLimiter m_drowning_interval;
	IntervalLimiter m_breathing_interval;
	std::list<std::string> m_player_names;
};

#endif

#endif