src/environment.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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.
  18 */
  19
  20 #include "environment.h"
  21 #include "filesys.h"
  22 #include "porting.h"
  23
  24 Environment::Environment()
  25 {
  26         m_daynight_ratio = 0.5;
  27 }
  28
  29 Environment::~Environment()
  30 {
  31         // Deallocate players
  32         for(core::list<Player*>::Iterator i = m_players.begin();
  33                         i != m_players.end(); i++)
  34         {
  35                 delete (*i);
  36         }
  37 }
  38
  39 void Environment::addPlayer(Player *player)
  40 {
  41         DSTACK(__FUNCTION_NAME);
  42         /*
  43                 Check that peer_ids are unique.
  44                 Also check that names are unique.
  45                 Exception: there can be multiple players with peer_id=0
  46         */
  47         // If peer id is non-zero, it has to be unique.
  48         if(player->peer_id != 0)
  49                 assert(getPlayer(player->peer_id) == NULL);
  50         // Name has to be unique.
  51         assert(getPlayer(player->getName()) == NULL);
  52         // Add.
  53         m_players.push_back(player);
  54 }
  55
  56 void Environment::removePlayer(u16 peer_id)
  57 {
  58         DSTACK(__FUNCTION_NAME);
  59 re_search:
  60         for(core::list<Player*>::Iterator i = m_players.begin();
  61                         i != m_players.end(); i++)
  62         {
  63                 Player *player = *i;
  64                 if(player->peer_id != peer_id)
  65                         continue;
  66
  67                 delete player;
  68                 m_players.erase(i);
  69                 // See if there is an another one
  70                 // (shouldn't be, but just to be sure)
  71                 goto re_search;
  72         }
  73 }
  74
  75 Player * Environment::getPlayer(u16 peer_id)
  76 {
  77         for(core::list<Player*>::Iterator i = m_players.begin();
  78                         i != m_players.end(); i++)
  79         {
  80                 Player *player = *i;
  81                 if(player->peer_id == peer_id)
  82                         return player;
  83         }
  84         return NULL;
  85 }
  86
  87 Player * Environment::getPlayer(const char *name)
  88 {
  89         for(core::list<Player*>::Iterator i = m_players.begin();
  90                         i != m_players.end(); i++)
  91         {
  92                 Player *player = *i;
  93                 if(strcmp(player->getName(), name) == 0)
  94                         return player;
  95         }
  96         return NULL;
  97 }
  98
  99 Player * Environment::getRandomConnectedPlayer()
 100 {
 101         core::list<Player*> connected_players = getPlayers(true);
 102         u32 chosen_one = myrand() % connected_players.size();
 103         u32 j = 0;
 104         for(core::list<Player*>::Iterator
 105                         i = connected_players.begin();
 106                         i != connected_players.end(); i++)
 107         {
 108                 if(j == chosen_one)
 109                 {
 110                         Player *player = *i;
 111                         return player;
 112                 }
 113                 j++;
 114         }
 115         return NULL;
 116 }
 117
 118 Player * Environment::getNearestConnectedPlayer(v3f pos)
 119 {
 120         core::list<Player*> connected_players = getPlayers(true);
 121         f32 nearest_d = 0;
 122         Player *nearest_player = NULL;
 123         for(core::list<Player*>::Iterator
 124                         i = connected_players.begin();
 125                         i != connected_players.end(); i++)
 126         {
 127                 Player *player = *i;
 128                 f32 d = player->getPosition().getDistanceFrom(pos);
 129                 if(d < nearest_d || nearest_player == NULL)
 130                 {
 131                         nearest_d = d;
 132                         nearest_player = player;
 133                 }
 134         }
 135         return nearest_player;
 136 }
 137
 138 core::list<Player*> Environment::getPlayers()
 139 {
 140         return m_players;
 141 }
 142
 143 core::list<Player*> Environment::getPlayers(bool ignore_disconnected)
 144 {
 145         core::list<Player*> newlist;
 146         for(core::list<Player*>::Iterator
 147                         i = m_players.begin();
 148                         i != m_players.end(); i++)
 149         {
 150                 Player *player = *i;
 151
 152                 if(ignore_disconnected)
 153                 {
 154                         // Ignore disconnected players
 155                         if(player->peer_id == 0)
 156                                 continue;
 157                 }
 158
 159                 newlist.push_back(player);
 160         }
 161         return newlist;
 162 }
 163
 164 void Environment::printPlayers(std::ostream &o)
 165 {
 166         o<<"Players in environment:"<<std::endl;
 167         for(core::list<Player*>::Iterator i = m_players.begin();
 168                         i != m_players.end(); i++)
 169         {
 170                 Player *player = *i;
 171                 o<<"Player peer_id="<<player->peer_id<<std::endl;
 172         }
 173 }
 174
 175 void Environment::setDayNightRatio(u32 r)
 176 {
 177         m_daynight_ratio = r;
 178 }
 179
 180 u32 Environment::getDayNightRatio()
 181 {
 182         return m_daynight_ratio;
 183 }
 184
 185 /*
 186         ServerEnvironment
 187 */
 188
 189 ServerEnvironment::ServerEnvironment(ServerMap *map, Server *server):
 190         m_map(map),
 191         m_server(server),
 192         m_random_spawn_timer(0)
 193 {
 194 }
 195
 196 ServerEnvironment::~ServerEnvironment()
 197 {
 198         // Drop/delete map
 199         m_map->drop();
 200 }
 201
 202 void ServerEnvironment::serializePlayers(const std::string &savedir)
 203 {
 204         std::string players_path = savedir + "/players";
 205         fs::CreateDir(players_path);
 206
 207         core::map<Player*, bool> saved_players;
 208
 209         std::vector<fs::DirListNode> player_files = fs::GetDirListing(players_path);
 210         for(u32 i=0; i<player_files.size(); i++)
 211         {
 212                 if(player_files[i].dir)
 213                         continue;
 214
 215                 // Full path to this file
 216                 std::string path = players_path + "/" + player_files[i].name;
 217
 218                 //dstream<<"Checking player file "<<path<<std::endl;
 219
 220                 // Load player to see what is its name
 221                 ServerRemotePlayer testplayer;
 222                 {
 223                         // Open file and deserialize
 224                         std::ifstream is(path.c_str(), std::ios_base::binary);
 225                         if(is.good() == false)
 226                         {
 227                                 dstream<<"Failed to read "<<path<<std::endl;
 228                                 continue;
 229                         }
 230                         testplayer.deSerialize(is);
 231                 }
 232
 233                 //dstream<<"Loaded test player with name "<<testplayer.getName()<<std::endl;
 234
 235                 // Search for the player
 236                 std::string playername = testplayer.getName();
 237                 Player *player = getPlayer(playername.c_str());
 238                 if(player == NULL)
 239                 {
 240                         dstream<<"Didn't find matching player, ignoring file "<<path<<std::endl;
 241                         continue;
 242                 }
 243
 244                 //dstream<<"Found matching player, overwriting."<<std::endl;
 245
 246                 // OK, found. Save player there.
 247                 {
 248                         // Open file and serialize
 249                         std::ofstream os(path.c_str(), std::ios_base::binary);
 250                         if(os.good() == false)
 251                         {
 252                                 dstream<<"Failed to overwrite "<<path<<std::endl;
 253                                 continue;
 254                         }
 255                         player->serialize(os);
 256                         saved_players.insert(player, true);
 257                 }
 258         }
 259
 260         for(core::list<Player*>::Iterator i = m_players.begin();
 261                         i != m_players.end(); i++)
 262         {
 263                 Player *player = *i;
 264                 if(saved_players.find(player) != NULL)
 265                 {
 266                         /*dstream<<"Player "<<player->getName()
 267                                         <<" was already saved."<<std::endl;*/
 268                         continue;
 269                 }
 270                 std::string playername = player->getName();
 271                 // Don't save unnamed player
 272                 if(playername == "")
 273                 {
 274                         //dstream<<"Not saving unnamed player."<<std::endl;
 275                         continue;
 276                 }
 277                 /*
 278                         Find a sane filename
 279                 */
 280                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false)
 281                         playername = "player";
 282                 std::string path = players_path + "/" + playername;
 283                 bool found = false;
 284                 for(u32 i=0; i<1000; i++)
 285                 {
 286                         if(fs::PathExists(path) == false)
 287                         {
 288                                 found = true;
 289                                 break;
 290                         }
 291                         path = players_path + "/" + playername + itos(i);
 292                 }
 293                 if(found == false)
 294                 {
 295                         dstream<<"WARNING: Didn't find free file for player"<<std::endl;
 296                         continue;
 297                 }
 298
 299                 {
 300                         /*dstream<<"Saving player "<<player->getName()<<" to "
 301                                         <<path<<std::endl;*/
 302                         // Open file and serialize
 303                         std::ofstream os(path.c_str(), std::ios_base::binary);
 304                         if(os.good() == false)
 305                         {
 306                                 dstream<<"WARNING: Failed to overwrite "<<path<<std::endl;
 307                                 continue;
 308                         }
 309                         player->serialize(os);
 310                         saved_players.insert(player, true);
 311                 }
 312         }
 313
 314         //dstream<<"Saved "<<saved_players.size()<<" players."<<std::endl;
 315 }
 316
 317 void ServerEnvironment::deSerializePlayers(const std::string &savedir)
 318 {
 319         std::string players_path = savedir + "/players";
 320
 321         core::map<Player*, bool> saved_players;
 322
 323         std::vector<fs::DirListNode> player_files = fs::GetDirListing(players_path);
 324         for(u32 i=0; i<player_files.size(); i++)
 325         {
 326                 if(player_files[i].dir)
 327                         continue;
 328
 329                 // Full path to this file
 330                 std::string path = players_path + "/" + player_files[i].name;
 331
 332                 dstream<<"Checking player file "<<path<<std::endl;
 333
 334                 // Load player to see what is its name
 335                 ServerRemotePlayer testplayer;
 336                 {
 337                         // Open file and deserialize
 338                         std::ifstream is(path.c_str(), std::ios_base::binary);
 339                         if(is.good() == false)
 340                         {
 341                                 dstream<<"Failed to read "<<path<<std::endl;
 342                                 continue;
 343                         }
 344                         testplayer.deSerialize(is);
 345                 }
 346
 347                 dstream<<"Loaded test player with name "<<testplayer.getName()<<std::endl;
 348
 349                 // Search for the player
 350                 std::string playername = testplayer.getName();
 351                 Player *player = getPlayer(playername.c_str());
 352                 bool newplayer = false;
 353                 if(player == NULL)
 354                 {
 355                         dstream<<"Is a new player"<<std::endl;
 356                         player = new ServerRemotePlayer();
 357                         newplayer = true;
 358                 }
 359
 360                 // Load player
 361                 {
 362                         dstream<<"Reading player "<<testplayer.getName()<<" from "
 363                                         <<path<<std::endl;
 364                         // Open file and deserialize
 365                         std::ifstream is(path.c_str(), std::ios_base::binary);
 366                         if(is.good() == false)
 367                         {
 368                                 dstream<<"Failed to read "<<path<<std::endl;
 369                                 continue;
 370                         }
 371                         player->deSerialize(is);
 372                 }
 373
 374                 if(newplayer)
 375                         addPlayer(player);
 376         }
 377 }
 378
 379 void ServerEnvironment::step(float dtime)
 380 {
 381         DSTACK(__FUNCTION_NAME);
 382
 383         // Get some settings
 384         //bool free_move = g_settings.getBool("free_move");
 385         bool footprints = g_settings.getBool("footprints");
 386
 387         {
 388                 //TimeTaker timer("Server m_map->timerUpdate()", g_device);
 389                 m_map->timerUpdate(dtime);
 390         }
 391
 392         /*
 393                 Handle players
 394         */
 395         for(core::list<Player*>::Iterator i = m_players.begin();
 396                         i != m_players.end(); i++)
 397         {
 398                 Player *player = *i;
 399                 v3f playerpos = player->getPosition();
 400
 401                 // Move
 402                 player->move(dtime, *m_map, 100*BS);
 403
 404                 /*
 405                         Add footsteps to grass
 406                 */
 407                 if(footprints)
 408                 {
 409                         // Get node that is at BS/4 under player
 410                         v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0), BS);
 411                         try{
 412                                 MapNode n = m_map->getNode(bottompos);
 413                                 if(n.d == CONTENT_GRASS)
 414                                 {
 415                                         n.d = CONTENT_GRASS_FOOTSTEPS;
 416                                         m_map->setNode(bottompos, n);
 417                                 }
 418                         }
 419                         catch(InvalidPositionException &e)
 420                         {
 421                         }
 422                 }
 423         }
 424
 425         if(g_settings.getBool("enable_experimental"))
 426         {
 427
 428         /*
 429                 Step active objects
 430         */
 431         for(core::map<u16, ServerActiveObject*>::Iterator
 432                         i = m_active_objects.getIterator();
 433                         i.atEnd()==false; i++)
 434         {
 435                 ServerActiveObject* obj = i.getNode()->getValue();
 436                 // Step object, putting messages directly to the queue
 437                 obj->step(dtime, m_active_object_messages);
 438         }
 439
 440         /*
 441                 Remove (m_removed && m_known_by_count==0) objects
 442         */
 443         {
 444                 core::list<u16> objects_to_remove;
 445                 for(core::map<u16, ServerActiveObject*>::Iterator
 446                                 i = m_active_objects.getIterator();
 447                                 i.atEnd()==false; i++)
 448                 {
 449                         u16 id = i.getNode()->getKey();
 450                         ServerActiveObject* obj = i.getNode()->getValue();
 451                         // This shouldn't happen but check it
 452                         if(obj == NULL)
 453                         {
 454                                 dstream<<"WARNING: NULL object found in ServerEnvironment"
 455                                                 <<" while finding removed objects. id="<<id<<std::endl;
 456                                 // Id to be removed from m_active_objects
 457                                 objects_to_remove.push_back(id);
 458                                 continue;
 459                         }
 460                         else
 461                         {
 462                                 // If not m_removed, don't remove.
 463                                 if(obj->m_removed == false)
 464                                         continue;
 465                                 // Delete
 466                                 delete obj;
 467                                 // Id to be removed from m_active_objects
 468                                 objects_to_remove.push_back(id);
 469                         }
 470                 }
 471                 // Remove references from m_active_objects
 472                 for(core::list<u16>::Iterator i = objects_to_remove.begin();
 473                                 i != objects_to_remove.end(); i++)
 474                 {
 475                         m_active_objects.remove(*i);
 476                 }
 477         }
 478
 479         /*
 480                 TEST CODE
 481         */
 482         m_random_spawn_timer -= dtime;
 483         if(m_random_spawn_timer < 0)
 484         {
 485                 m_random_spawn_timer += myrand_range(2.0, 20.0);
 486
 487                 /*
 488                         Find some position
 489                 */
 490
 491                 /*v2s16 p2d(myrand_range(-5,5), myrand_range(-5,5));
 492                 s16 y = 1 + getServerMap().findGroundLevel(p2d);
 493                 v3f pos(p2d.X*BS,y*BS,p2d.Y*BS);*/
 494
 495                 Player *player = getRandomConnectedPlayer();
 496                 v3f pos(0,0,0);
 497                 if(player)
 498                         pos = player->getPosition();
 499                 pos += v3f(
 500                         myrand_range(-3,3)*BS,
 501                         0,
 502                         myrand_range(-3,3)*BS
 503                 );
 504
 505                 /*
 506                         Create a TestSAO object
 507                 */
 508
 509                 TestSAO *obj = new TestSAO(this, 0,
 510                                 v3f(myrand_range(-2*BS,2*BS), BS*5, myrand_range(-2*BS,2*BS)));
 511
 512                 // Add the object to the environment
 513                 addActiveObject(obj);
 514         }
 515
 516         } // enable_experimental
 517 }
 518
 519 ServerActiveObject* ServerEnvironment::getActiveObject(u16 id)
 520 {
 521         core::map<u16, ServerActiveObject*>::Node *n;
 522         n = m_active_objects.find(id);
 523         if(n == NULL)
 524                 return NULL;
 525         return n->getValue();
 526 }
 527
 528 bool isFreeServerActiveObjectId(u16 id,
 529                 core::map<u16, ServerActiveObject*> &objects)
 530 {
 531         if(id == 0)
 532                 return false;
 533
 534         for(core::map<u16, ServerActiveObject*>::Iterator
 535                         i = objects.getIterator();
 536                         i.atEnd()==false; i++)
 537         {
 538                 if(i.getNode()->getKey() == id)
 539                         return false;
 540         }
 541         return true;
 542 }
 543
 544 u16 getFreeServerActiveObjectId(
 545                 core::map<u16, ServerActiveObject*> &objects)
 546 {
 547         u16 new_id = 1;
 548         for(;;)
 549         {
 550                 if(isFreeServerActiveObjectId(new_id, objects))
 551                         return new_id;
 552
 553                 if(new_id == 65535)
 554                         return 0;
 555
 556                 new_id++;
 557         }
 558 }
 559
 560 u16 ServerEnvironment::addActiveObject(ServerActiveObject *object)
 561 {
 562         assert(object);
 563         if(object->getId() == 0)
 564         {
 565                 u16 new_id = getFreeServerActiveObjectId(m_active_objects);
 566                 if(new_id == 0)
 567                 {
 568                         dstream<<"WARNING: ServerEnvironment::addActiveObject(): "
 569                                         <<"no free ids available"<<std::endl;
 570                         delete object;
 571                         return 0;
 572                 }
 573                 object->setId(new_id);
 574         }
 575         if(isFreeServerActiveObjectId(object->getId(), m_active_objects) == false)
 576         {
 577                 dstream<<"WARNING: ServerEnvironment::addActiveObject(): "
 578                                 <<"id is not free ("<<object->getId()<<")"<<std::endl;
 579                 delete object;
 580                 return 0;
 581         }
 582         dstream<<"INGO: ServerEnvironment::addActiveObject(): "
 583                         <<"added (id="<<object->getId()<<")"<<std::endl;
 584         m_active_objects.insert(object->getId(), object);
 585         return object->getId();
 586 }
 587
 588 /*
 589         Finds out what new objects have been added to
 590         inside a radius around a position
 591 */
 592 void ServerEnvironment::getAddedActiveObjects(v3s16 pos, s16 radius,
 593                 core::map<u16, bool> &current_objects,
 594                 core::map<u16, bool> &added_objects)
 595 {
 596         v3f pos_f = intToFloat(pos, BS);
 597         f32 radius_f = radius * BS;
 598         /*
 599                 Go through the object list,
 600                 - discard m_removed objects,
 601                 - discard objects that are too far away,
 602                 - discard objects that are found in current_objects.
 603                 - add remaining objects to added_objects
 604         */
 605         for(core::map<u16, ServerActiveObject*>::Iterator
 606                         i = m_active_objects.getIterator();
 607                         i.atEnd()==false; i++)
 608         {
 609                 u16 id = i.getNode()->getKey();
 610                 // Get object
 611                 ServerActiveObject *object = i.getNode()->getValue();
 612                 if(object == NULL)
 613                         continue;
 614                 // Discard if removed
 615                 if(object->m_removed)
 616                         continue;
 617                 // Discard if too far
 618                 f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
 619                 if(distance_f > radius_f)
 620                         continue;
 621                 // Discard if already on current_objects
 622                 core::map<u16, bool>::Node *n;
 623                 n = current_objects.find(id);
 624                 if(n != NULL)
 625                         continue;
 626                 // Add to added_objects
 627                 added_objects.insert(id, false);
 628         }
 629 }
 630
 631 /*
 632         Finds out what objects have been removed from
 633         inside a radius around a position
 634 */
 635 void ServerEnvironment::getRemovedActiveObjects(v3s16 pos, s16 radius,
 636                 core::map<u16, bool> &current_objects,
 637                 core::map<u16, bool> &removed_objects)
 638 {
 639         v3f pos_f = intToFloat(pos, BS);
 640         f32 radius_f = radius * BS;
 641         /*
 642                 Go through current_objects; object is removed if:
 643                 - object is not found in m_active_objects (this is actually an
 644                   error condition; objects should be set m_removed=true and removed
 645                   only after all clients have been informed about removal), or
 646                 - object has m_removed=true, or
 647                 - object is too far away
 648         */
 649         for(core::map<u16, bool>::Iterator
 650                         i = current_objects.getIterator();
 651                         i.atEnd()==false; i++)
 652         {
 653                 u16 id = i.getNode()->getKey();
 654                 ServerActiveObject *object = getActiveObject(id);
 655                 if(object == NULL)
 656                 {
 657                         dstream<<"WARNING: ServerEnvironment::getRemovedActiveObjects():"
 658                                         <<" object in current_objects is NULL"<<std::endl;
 659                 }
 660                 else if(object->m_removed == false)
 661                 {
 662                         f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
 663                         /*dstream<<"removed == false"
 664                                         <<"distance_f = "<<distance_f
 665                                         <<", radius_f = "<<radius_f<<std::endl;*/
 666                         if(distance_f < radius_f)
 667                         {
 668                                 // Not removed
 669                                 continue;
 670                         }
 671                 }
 672                 removed_objects.insert(id, false);
 673         }
 674 }
 675
 676 ActiveObjectMessage ServerEnvironment::getActiveObjectMessage()
 677 {
 678         if(m_active_object_messages.size() == 0)
 679                 return ActiveObjectMessage(0);
 680
 681         return m_active_object_messages.pop_front();
 682 }
 683
 684 #ifndef SERVER
 685
 686 /*
 687         ClientEnvironment
 688 */
 689
 690 ClientEnvironment::ClientEnvironment(ClientMap *map, scene::ISceneManager *smgr):
 691         m_map(map),
 692         m_smgr(smgr)
 693 {
 694         assert(m_map);
 695         assert(m_smgr);
 696 }
 697
 698 ClientEnvironment::~ClientEnvironment()
 699 {
 700         // delete active objects
 701         for(core::map<u16, ClientActiveObject*>::Iterator
 702                         i = m_active_objects.getIterator();
 703                         i.atEnd()==false; i++)
 704         {
 705                 delete i.getNode()->getValue();
 706         }
 707
 708         // Drop/delete map
 709         m_map->drop();
 710 }
 711
 712 void ClientEnvironment::addPlayer(Player *player)
 713 {
 714         DSTACK(__FUNCTION_NAME);
 715         /*
 716                 It is a failure if player is local and there already is a local
 717                 player
 718         */
 719         assert(!(player->isLocal() == true && getLocalPlayer() != NULL));
 720
 721         Environment::addPlayer(player);
 722 }
 723
 724 LocalPlayer * ClientEnvironment::getLocalPlayer()
 725 {
 726         for(core::list<Player*>::Iterator i = m_players.begin();
 727                         i != m_players.end(); i++)
 728         {
 729                 Player *player = *i;
 730                 if(player->isLocal())
 731                         return (LocalPlayer*)player;
 732         }
 733         return NULL;
 734 }
 735
 736 void ClientEnvironment::step(float dtime)
 737 {
 738         DSTACK(__FUNCTION_NAME);
 739
 740         // Get some settings
 741         bool free_move = g_settings.getBool("free_move");
 742         bool footprints = g_settings.getBool("footprints");
 743
 744         {
 745                 //TimeTaker timer("Client m_map->timerUpdate()", g_device);
 746                 m_map->timerUpdate(dtime);
 747         }
 748
 749         /*
 750                 Get the speed the player is going
 751         */
 752         f32 player_speed = 0.001; // just some small value
 753         LocalPlayer *lplayer = getLocalPlayer();
 754         if(lplayer)
 755                 player_speed = lplayer->getSpeed().getLength();
 756
 757         /*
 758                 Maximum position increment
 759         */
 760         //f32 position_max_increment = 0.05*BS;
 761         f32 position_max_increment = 0.1*BS;
 762
 763         // Maximum time increment (for collision detection etc)
 764         // time = distance / speed
 765         f32 dtime_max_increment = position_max_increment / player_speed;
 766
 767         // Maximum time increment is 10ms or lower
 768         if(dtime_max_increment > 0.01)
 769                 dtime_max_increment = 0.01;
 770
 771         // Don't allow overly huge dtime
 772         if(dtime > 0.5)
 773                 dtime = 0.5;
 774
 775         f32 dtime_downcount = dtime;
 776
 777         /*
 778                 Stuff that has a maximum time increment
 779         */
 780
 781         u32 loopcount = 0;
 782         do
 783         {
 784                 loopcount++;
 785
 786                 f32 dtime_part;
 787                 if(dtime_downcount > dtime_max_increment)
 788                 {
 789                         dtime_part = dtime_max_increment;
 790                         dtime_downcount -= dtime_part;
 791                 }
 792                 else
 793                 {
 794                         dtime_part = dtime_downcount;
 795                         /*
 796                                 Setting this to 0 (no -=dtime_part) disables an infinite loop
 797                                 when dtime_part is so small that dtime_downcount -= dtime_part
 798                                 does nothing
 799                         */
 800                         dtime_downcount = 0;
 801                 }
 802
 803                 /*
 804                         Handle local player
 805                 */
 806
 807                 {
 808                         Player *player = getLocalPlayer();
 809
 810                         v3f playerpos = player->getPosition();
 811
 812                         // Apply physics
 813                         if(free_move == false)
 814                         {
 815                                 // Gravity
 816                                 v3f speed = player->getSpeed();
 817                                 if(player->swimming_up == false)
 818                                         speed.Y -= 9.81 * BS * dtime_part * 2;
 819
 820                                 // Water resistance
 821                                 if(player->in_water_stable || player->in_water)
 822                                 {
 823                                         f32 max_down = 2.0*BS;
 824                                         if(speed.Y < -max_down) speed.Y = -max_down;
 825
 826                                         f32 max = 2.5*BS;
 827                                         if(speed.getLength() > max)
 828                                         {
 829                                                 speed = speed / speed.getLength() * max;
 830                                         }
 831                                 }
 832
 833                                 player->setSpeed(speed);
 834                         }
 835
 836                         /*
 837                                 Move the player.
 838                                 This also does collision detection.
 839                         */
 840                         player->move(dtime_part, *m_map, position_max_increment);
 841                 }
 842         }
 843         while(dtime_downcount > 0.001);
 844
 845         //std::cout<<"Looped "<<loopcount<<" times."<<std::endl;
 846
 847         /*
 848                 Stuff that can be done in an arbitarily large dtime
 849         */
 850         for(core::list<Player*>::Iterator i = m_players.begin();
 851                         i != m_players.end(); i++)
 852         {
 853                 Player *player = *i;
 854                 v3f playerpos = player->getPosition();
 855
 856                 /*
 857                         Handle non-local players
 858                 */
 859                 if(player->isLocal() == false)
 860                 {
 861                         // Move
 862                         player->move(dtime, *m_map, 100*BS);
 863
 864                         // Update lighting on remote players on client
 865                         u8 light = LIGHT_MAX;
 866                         try{
 867                                 // Get node at head
 868                                 v3s16 p = floatToInt(playerpos + v3f(0,BS+BS/2,0), BS);
 869                                 MapNode n = m_map->getNode(p);
 870                                 light = n.getLightBlend(m_daynight_ratio);
 871                         }
 872                         catch(InvalidPositionException &e) {}
 873                         player->updateLight(light);
 874                 }
 875
 876                 /*
 877                         Add footsteps to grass
 878                 */
 879                 if(footprints)
 880                 {
 881                         // Get node that is at BS/4 under player
 882                         v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0), BS);
 883                         try{
 884                                 MapNode n = m_map->getNode(bottompos);
 885                                 if(n.d == CONTENT_GRASS)
 886                                 {
 887                                         n.d = CONTENT_GRASS_FOOTSTEPS;
 888                                         m_map->setNode(bottompos, n);
 889                                         // Update mesh on client
 890                                         if(m_map->mapType() == MAPTYPE_CLIENT)
 891                                         {
 892                                                 v3s16 p_blocks = getNodeBlockPos(bottompos);
 893                                                 MapBlock *b = m_map->getBlockNoCreate(p_blocks);
 894                                                 //b->updateMesh(m_daynight_ratio);
 895                                                 b->setMeshExpired(true);
 896                                         }
 897                                 }
 898                         }
 899                         catch(InvalidPositionException &e)
 900                         {
 901                         }
 902                 }
 903         }
 904
 905         /*
 906                 Step active objects
 907         */
 908         for(core::map<u16, ClientActiveObject*>::Iterator
 909                         i = m_active_objects.getIterator();
 910                         i.atEnd()==false; i++)
 911         {
 912                 ClientActiveObject* obj = i.getNode()->getValue();
 913                 // Step object
 914                 obj->step(dtime);
 915         }
 916 }
 917
 918 void ClientEnvironment::updateMeshes(v3s16 blockpos)
 919 {
 920         m_map->updateMeshes(blockpos, m_daynight_ratio);
 921 }
 922
 923 void ClientEnvironment::expireMeshes(bool only_daynight_diffed)
 924 {
 925         m_map->expireMeshes(only_daynight_diffed);
 926 }
 927
 928 ClientActiveObject* ClientEnvironment::getActiveObject(u16 id)
 929 {
 930         core::map<u16, ClientActiveObject*>::Node *n;
 931         n = m_active_objects.find(id);
 932         if(n == NULL)
 933                 return NULL;
 934         return n->getValue();
 935 }
 936
 937 bool isFreeClientActiveObjectId(u16 id,
 938                 core::map<u16, ClientActiveObject*> &objects)
 939 {
 940         if(id == 0)
 941                 return false;
 942
 943         for(core::map<u16, ClientActiveObject*>::Iterator
 944                         i = objects.getIterator();
 945                         i.atEnd()==false; i++)
 946         {
 947                 if(i.getNode()->getKey() == id)
 948                         return false;
 949         }
 950         return true;
 951 }
 952
 953 u16 getFreeClientActiveObjectId(
 954                 core::map<u16, ClientActiveObject*> &objects)
 955 {
 956         u16 new_id = 1;
 957         for(;;)
 958         {
 959                 if(isFreeClientActiveObjectId(new_id, objects))
 960                         return new_id;
 961
 962                 if(new_id == 65535)
 963                         return 0;
 964
 965                 new_id++;
 966         }
 967 }
 968
 969 u16 ClientEnvironment::addActiveObject(ClientActiveObject *object)
 970 {
 971         assert(object);
 972         if(object->getId() == 0)
 973         {
 974                 u16 new_id = getFreeClientActiveObjectId(m_active_objects);
 975                 if(new_id == 0)
 976                 {
 977                         dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
 978                                         <<"no free ids available"<<std::endl;
 979                         delete object;
 980                         return 0;
 981                 }
 982                 object->setId(new_id);
 983         }
 984         if(isFreeClientActiveObjectId(object->getId(), m_active_objects) == false)
 985         {
 986                 dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
 987                                 <<"id is not free ("<<object->getId()<<")"<<std::endl;
 988                 delete object;
 989                 return 0;
 990         }
 991         dstream<<"INGO: ClientEnvironment::addActiveObject(): "
 992                         <<"added (id="<<object->getId()<<")"<<std::endl;
 993         m_active_objects.insert(object->getId(), object);
 994         object->addToScene(m_smgr);
 995         return object->getId();
 996 }
 997
 998 void ClientEnvironment::addActiveObject(u16 id, u8 type,
 999                 const std::string &init_data)
1000 {
1001         ClientActiveObject* obj = ClientActiveObject::create(type);
1002         if(obj == NULL)
1003         {
1004                 dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
1005                                 <<"id="<<id<<" type="<<type<<": Couldn't create object"
1006                                 <<std::endl;
1007                 return;
1008         }
1009
1010         obj->setId(id);
1011
1012         addActiveObject(obj);
1013
1014         obj->initialize(init_data);
1015 }
1016
1017 void ClientEnvironment::removeActiveObject(u16 id)
1018 {
1019         dstream<<"ClientEnvironment::removeActiveObject(): "
1020                         <<"id="<<id<<std::endl;
1021         ClientActiveObject* obj = getActiveObject(id);
1022         if(obj == NULL)
1023         {
1024                 dstream<<"WARNING: ClientEnvironment::removeActiveObject(): "
1025                                 <<"id="<<id<<" not found"<<std::endl;
1026                 return;
1027         }
1028         obj->removeFromScene();
1029         delete obj;
1030         m_active_objects.remove(id);
1031 }
1032
1033 void ClientEnvironment::processActiveObjectMessage(u16 id,
1034                 const std::string &data)
1035 {
1036         ClientActiveObject* obj = getActiveObject(id);
1037         if(obj == NULL)
1038         {
1039                 dstream<<"WARNING: ClientEnvironment::processActiveObjectMessage():"
1040                                 <<" got message for id="<<id<<", which doesn't exist."
1041                                 <<std::endl;
1042                 return;
1043         }
1044         obj->processMessage(data);
1045 }
1046
1047 #endif // #ifndef SERVER
1048
1049