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                 /*TestSAO *obj = new TestSAO(0,
 488                                 v3f(myrand_range(-2*BS,2*BS), BS*5, myrand_range(-2*BS,2*BS)));*/
 489
 490                 /*
 491                         Find some position
 492                 */
 493
 494                 /*v2s16 p2d(myrand_range(-5,5), myrand_range(-5,5));
 495                 s16 y = 1 + getServerMap().findGroundLevel(p2d);
 496                 v3f pos(p2d.X*BS,y*BS,p2d.Y*BS);*/
 497
 498                 Player *player = getRandomConnectedPlayer();
 499                 v3f pos(0,0,0);
 500                 if(player)
 501                         pos = player->getPosition();
 502                 pos += v3f(
 503                         myrand_range(-3,3)*BS,
 504                         0,
 505                         myrand_range(-3,3)*BS
 506                 );
 507
 508                 /*
 509                         Create a LuaSAO (ServerActiveObject)
 510                 */
 511
 512                 LuaSAO *obj = new LuaSAO(this, 0, pos);
 513
 514                 /*
 515                         Select a random type for it
 516                 */
 517                 std::string objectdir = porting::getDataPath("scripts/objects");
 518                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(objectdir);
 519                 if(dirlist.size() > 0)
 520                 {
 521                         u32 selected_i = myrand_range(0, dirlist.size()-1);
 522                         std::string selected_name = "";
 523                         selected_name = dirlist[selected_i].name;
 524                         /*for(u32 i=0; i<dirlist.size(); i++)*/
 525
 526                         dstream<<"ServerEnvironment: Selected script name \""<<selected_name
 527                                         <<"\" for new lua object"<<std::endl;
 528
 529                         /*
 530                                 Load the scripts for the type
 531                         */
 532                         obj->initializeFromNothing(selected_name.c_str());
 533
 534                         // Add the object to the environment
 535                         addActiveObject(obj);
 536                 }
 537         }
 538
 539         } // enable_experimental
 540 }
 541
 542 ServerActiveObject* ServerEnvironment::getActiveObject(u16 id)
 543 {
 544         core::map<u16, ServerActiveObject*>::Node *n;
 545         n = m_active_objects.find(id);
 546         if(n == NULL)
 547                 return NULL;
 548         return n->getValue();
 549 }
 550
 551 bool isFreeServerActiveObjectId(u16 id,
 552                 core::map<u16, ServerActiveObject*> &objects)
 553 {
 554         if(id == 0)
 555                 return false;
 556
 557         for(core::map<u16, ServerActiveObject*>::Iterator
 558                         i = objects.getIterator();
 559                         i.atEnd()==false; i++)
 560         {
 561                 if(i.getNode()->getKey() == id)
 562                         return false;
 563         }
 564         return true;
 565 }
 566
 567 u16 getFreeServerActiveObjectId(
 568                 core::map<u16, ServerActiveObject*> &objects)
 569 {
 570         u16 new_id = 1;
 571         for(;;)
 572         {
 573                 if(isFreeServerActiveObjectId(new_id, objects))
 574                         return new_id;
 575
 576                 if(new_id == 65535)
 577                         return 0;
 578
 579                 new_id++;
 580         }
 581 }
 582
 583 u16 ServerEnvironment::addActiveObject(ServerActiveObject *object)
 584 {
 585         assert(object);
 586         if(object->getId() == 0)
 587         {
 588                 u16 new_id = getFreeServerActiveObjectId(m_active_objects);
 589                 if(new_id == 0)
 590                 {
 591                         dstream<<"WARNING: ServerEnvironment::addActiveObject(): "
 592                                         <<"no free ids available"<<std::endl;
 593                         delete object;
 594                         return 0;
 595                 }
 596                 object->setId(new_id);
 597         }
 598         if(isFreeServerActiveObjectId(object->getId(), m_active_objects) == false)
 599         {
 600                 dstream<<"WARNING: ServerEnvironment::addActiveObject(): "
 601                                 <<"id is not free ("<<object->getId()<<")"<<std::endl;
 602                 delete object;
 603                 return 0;
 604         }
 605         dstream<<"INGO: ServerEnvironment::addActiveObject(): "
 606                         <<"added (id="<<object->getId()<<")"<<std::endl;
 607         m_active_objects.insert(object->getId(), object);
 608         return object->getId();
 609 }
 610
 611 /*
 612         Finds out what new objects have been added to
 613         inside a radius around a position
 614 */
 615 void ServerEnvironment::getAddedActiveObjects(v3s16 pos, s16 radius,
 616                 core::map<u16, bool> &current_objects,
 617                 core::map<u16, bool> &added_objects)
 618 {
 619         v3f pos_f = intToFloat(pos, BS);
 620         f32 radius_f = radius * BS;
 621         /*
 622                 Go through the object list,
 623                 - discard m_removed objects,
 624                 - discard objects that are too far away,
 625                 - discard objects that are found in current_objects.
 626                 - add remaining objects to added_objects
 627         */
 628         for(core::map<u16, ServerActiveObject*>::Iterator
 629                         i = m_active_objects.getIterator();
 630                         i.atEnd()==false; i++)
 631         {
 632                 u16 id = i.getNode()->getKey();
 633                 // Get object
 634                 ServerActiveObject *object = i.getNode()->getValue();
 635                 if(object == NULL)
 636                         continue;
 637                 // Discard if removed
 638                 if(object->m_removed)
 639                         continue;
 640                 // Discard if too far
 641                 f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
 642                 if(distance_f > radius_f)
 643                         continue;
 644                 // Discard if already on current_objects
 645                 core::map<u16, bool>::Node *n;
 646                 n = current_objects.find(id);
 647                 if(n != NULL)
 648                         continue;
 649                 // Add to added_objects
 650                 added_objects.insert(id, false);
 651         }
 652 }
 653
 654 /*
 655         Finds out what objects have been removed from
 656         inside a radius around a position
 657 */
 658 void ServerEnvironment::getRemovedActiveObjects(v3s16 pos, s16 radius,
 659                 core::map<u16, bool> &current_objects,
 660                 core::map<u16, bool> &removed_objects)
 661 {
 662         v3f pos_f = intToFloat(pos, BS);
 663         f32 radius_f = radius * BS;
 664         /*
 665                 Go through current_objects; object is removed if:
 666                 - object is not found in m_active_objects (this is actually an
 667                   error condition; objects should be set m_removed=true and removed
 668                   only after all clients have been informed about removal), or
 669                 - object has m_removed=true, or
 670                 - object is too far away
 671         */
 672         for(core::map<u16, bool>::Iterator
 673                         i = current_objects.getIterator();
 674                         i.atEnd()==false; i++)
 675         {
 676                 u16 id = i.getNode()->getKey();
 677                 ServerActiveObject *object = getActiveObject(id);
 678                 if(object == NULL)
 679                 {
 680                         dstream<<"WARNING: ServerEnvironment::getRemovedActiveObjects():"
 681                                         <<" object in current_objects is NULL"<<std::endl;
 682                 }
 683                 else if(object->m_removed == false)
 684                 {
 685                         f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
 686                         /*dstream<<"removed == false"
 687                                         <<"distance_f = "<<distance_f
 688                                         <<", radius_f = "<<radius_f<<std::endl;*/
 689                         if(distance_f < radius_f)
 690                         {
 691                                 // Not removed
 692                                 continue;
 693                         }
 694                 }
 695                 removed_objects.insert(id, false);
 696         }
 697 }
 698
 699 ActiveObjectMessage ServerEnvironment::getActiveObjectMessage()
 700 {
 701         if(m_active_object_messages.size() == 0)
 702                 return ActiveObjectMessage(0);
 703
 704         return m_active_object_messages.pop_front();
 705 }
 706
 707 #ifndef SERVER
 708
 709 /*
 710         ClientEnvironment
 711 */
 712
 713 ClientEnvironment::ClientEnvironment(ClientMap *map, scene::ISceneManager *smgr):
 714         m_map(map),
 715         m_smgr(smgr)
 716 {
 717         assert(m_map);
 718         assert(m_smgr);
 719 }
 720
 721 ClientEnvironment::~ClientEnvironment()
 722 {
 723         // delete active objects
 724         for(core::map<u16, ClientActiveObject*>::Iterator
 725                         i = m_active_objects.getIterator();
 726                         i.atEnd()==false; i++)
 727         {
 728                 delete i.getNode()->getValue();
 729         }
 730
 731         // Drop/delete map
 732         m_map->drop();
 733 }
 734
 735 void ClientEnvironment::addPlayer(Player *player)
 736 {
 737         DSTACK(__FUNCTION_NAME);
 738         /*
 739                 It is a failure if player is local and there already is a local
 740                 player
 741         */
 742         assert(!(player->isLocal() == true && getLocalPlayer() != NULL));
 743
 744         Environment::addPlayer(player);
 745 }
 746
 747 LocalPlayer * ClientEnvironment::getLocalPlayer()
 748 {
 749         for(core::list<Player*>::Iterator i = m_players.begin();
 750                         i != m_players.end(); i++)
 751         {
 752                 Player *player = *i;
 753                 if(player->isLocal())
 754                         return (LocalPlayer*)player;
 755         }
 756         return NULL;
 757 }
 758
 759 void ClientEnvironment::step(float dtime)
 760 {
 761         DSTACK(__FUNCTION_NAME);
 762
 763         // Get some settings
 764         bool free_move = g_settings.getBool("free_move");
 765         bool footprints = g_settings.getBool("footprints");
 766
 767         {
 768                 //TimeTaker timer("Client m_map->timerUpdate()", g_device);
 769                 m_map->timerUpdate(dtime);
 770         }
 771
 772         /*
 773                 Get the speed the player is going
 774         */
 775         f32 player_speed = 0.001; // just some small value
 776         LocalPlayer *lplayer = getLocalPlayer();
 777         if(lplayer)
 778                 player_speed = lplayer->getSpeed().getLength();
 779
 780         /*
 781                 Maximum position increment
 782         */
 783         //f32 position_max_increment = 0.05*BS;
 784         f32 position_max_increment = 0.1*BS;
 785
 786         // Maximum time increment (for collision detection etc)
 787         // time = distance / speed
 788         f32 dtime_max_increment = position_max_increment / player_speed;
 789
 790         // Maximum time increment is 10ms or lower
 791         if(dtime_max_increment > 0.01)
 792                 dtime_max_increment = 0.01;
 793
 794         // Don't allow overly huge dtime
 795         if(dtime > 0.5)
 796                 dtime = 0.5;
 797
 798         f32 dtime_downcount = dtime;
 799
 800         /*
 801                 Stuff that has a maximum time increment
 802         */
 803
 804         u32 loopcount = 0;
 805         do
 806         {
 807                 loopcount++;
 808
 809                 f32 dtime_part;
 810                 if(dtime_downcount > dtime_max_increment)
 811                         dtime_part = dtime_max_increment;
 812                 else
 813                         dtime_part = dtime_downcount;
 814                 dtime_downcount -= dtime_part;
 815
 816                 /*
 817                         Handle local player
 818                 */
 819
 820                 {
 821                         Player *player = getLocalPlayer();
 822
 823                         v3f playerpos = player->getPosition();
 824
 825                         // Apply physics
 826                         if(free_move == false)
 827                         {
 828                                 // Gravity
 829                                 v3f speed = player->getSpeed();
 830                                 if(player->swimming_up == false)
 831                                         speed.Y -= 9.81 * BS * dtime_part * 2;
 832
 833                                 // Water resistance
 834                                 if(player->in_water_stable || player->in_water)
 835                                 {
 836                                         f32 max_down = 2.0*BS;
 837                                         if(speed.Y < -max_down) speed.Y = -max_down;
 838
 839                                         f32 max = 2.5*BS;
 840                                         if(speed.getLength() > max)
 841                                         {
 842                                                 speed = speed / speed.getLength() * max;
 843                                         }
 844                                 }
 845
 846                                 player->setSpeed(speed);
 847                         }
 848
 849                         /*
 850                                 Move the player.
 851                                 This also does collision detection.
 852                         */
 853                         player->move(dtime_part, *m_map, position_max_increment);
 854                 }
 855         }
 856         while(dtime_downcount > 0.001);
 857
 858         //std::cout<<"Looped "<<loopcount<<" times."<<std::endl;
 859
 860         /*
 861                 Stuff that can be done in an arbitarily large dtime
 862         */
 863         for(core::list<Player*>::Iterator i = m_players.begin();
 864                         i != m_players.end(); i++)
 865         {
 866                 Player *player = *i;
 867                 v3f playerpos = player->getPosition();
 868
 869                 /*
 870                         Handle non-local players
 871                 */
 872                 if(player->isLocal() == false)
 873                 {
 874                         // Move
 875                         player->move(dtime, *m_map, 100*BS);
 876
 877                         // Update lighting on remote players on client
 878                         u8 light = LIGHT_MAX;
 879                         try{
 880                                 // Get node at head
 881                                 v3s16 p = floatToInt(playerpos + v3f(0,BS+BS/2,0), BS);
 882                                 MapNode n = m_map->getNode(p);
 883                                 light = n.getLightBlend(m_daynight_ratio);
 884                         }
 885                         catch(InvalidPositionException &e) {}
 886                         player->updateLight(light);
 887                 }
 888
 889                 /*
 890                         Add footsteps to grass
 891                 */
 892                 if(footprints)
 893                 {
 894                         // Get node that is at BS/4 under player
 895                         v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0), BS);
 896                         try{
 897                                 MapNode n = m_map->getNode(bottompos);
 898                                 if(n.d == CONTENT_GRASS)
 899                                 {
 900                                         n.d = CONTENT_GRASS_FOOTSTEPS;
 901                                         m_map->setNode(bottompos, n);
 902                                         // Update mesh on client
 903                                         if(m_map->mapType() == MAPTYPE_CLIENT)
 904                                         {
 905                                                 v3s16 p_blocks = getNodeBlockPos(bottompos);
 906                                                 MapBlock *b = m_map->getBlockNoCreate(p_blocks);
 907                                                 b->updateMesh(m_daynight_ratio);
 908                                         }
 909                                 }
 910                         }
 911                         catch(InvalidPositionException &e)
 912                         {
 913                         }
 914                 }
 915         }
 916
 917         /*
 918                 Step active objects
 919         */
 920         for(core::map<u16, ClientActiveObject*>::Iterator
 921                         i = m_active_objects.getIterator();
 922                         i.atEnd()==false; i++)
 923         {
 924                 ClientActiveObject* obj = i.getNode()->getValue();
 925                 // Step object
 926                 obj->step(dtime);
 927         }
 928 }
 929
 930 void ClientEnvironment::updateMeshes(v3s16 blockpos)
 931 {
 932         m_map->updateMeshes(blockpos, m_daynight_ratio);
 933 }
 934
 935 void ClientEnvironment::expireMeshes(bool only_daynight_diffed)
 936 {
 937         m_map->expireMeshes(only_daynight_diffed);
 938 }
 939
 940 ClientActiveObject* ClientEnvironment::getActiveObject(u16 id)
 941 {
 942         core::map<u16, ClientActiveObject*>::Node *n;
 943         n = m_active_objects.find(id);
 944         if(n == NULL)
 945                 return NULL;
 946         return n->getValue();
 947 }
 948
 949 bool isFreeClientActiveObjectId(u16 id,
 950                 core::map<u16, ClientActiveObject*> &objects)
 951 {
 952         if(id == 0)
 953                 return false;
 954
 955         for(core::map<u16, ClientActiveObject*>::Iterator
 956                         i = objects.getIterator();
 957                         i.atEnd()==false; i++)
 958         {
 959                 if(i.getNode()->getKey() == id)
 960                         return false;
 961         }
 962         return true;
 963 }
 964
 965 u16 getFreeClientActiveObjectId(
 966                 core::map<u16, ClientActiveObject*> &objects)
 967 {
 968         u16 new_id = 1;
 969         for(;;)
 970         {
 971                 if(isFreeClientActiveObjectId(new_id, objects))
 972                         return new_id;
 973
 974                 if(new_id == 65535)
 975                         return 0;
 976
 977                 new_id++;
 978         }
 979 }
 980
 981 u16 ClientEnvironment::addActiveObject(ClientActiveObject *object)
 982 {
 983         assert(object);
 984         if(object->getId() == 0)
 985         {
 986                 u16 new_id = getFreeClientActiveObjectId(m_active_objects);
 987                 if(new_id == 0)
 988                 {
 989                         dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
 990                                         <<"no free ids available"<<std::endl;
 991                         delete object;
 992                         return 0;
 993                 }
 994                 object->setId(new_id);
 995         }
 996         if(isFreeClientActiveObjectId(object->getId(), m_active_objects) == false)
 997         {
 998                 dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
 999                                 <<"id is not free ("<<object->getId()<<")"<<std::endl;
1000                 delete object;
1001                 return 0;
1002         }
1003         dstream<<"INGO: ClientEnvironment::addActiveObject(): "
1004                         <<"added (id="<<object->getId()<<")"<<std::endl;
1005         m_active_objects.insert(object->getId(), object);
1006         object->addToScene(m_smgr);
1007         return object->getId();
1008 }
1009
1010 void ClientEnvironment::addActiveObject(u16 id, u8 type,
1011                 const std::string &init_data)
1012 {
1013         ClientActiveObject* obj = ClientActiveObject::create(type);
1014         if(obj == NULL)
1015         {
1016                 dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
1017                                 <<"id="<<id<<" type="<<type<<": Couldn't create object"
1018                                 <<std::endl;
1019                 return;
1020         }
1021
1022         obj->setId(id);
1023
1024         addActiveObject(obj);
1025
1026         obj->initialize(init_data);
1027 }
1028
1029 void ClientEnvironment::removeActiveObject(u16 id)
1030 {
1031         dstream<<"ClientEnvironment::removeActiveObject(): "
1032                         <<"id="<<id<<std::endl;
1033         ClientActiveObject* obj = getActiveObject(id);
1034         if(obj == NULL)
1035         {
1036                 dstream<<"WARNING: ClientEnvironment::removeActiveObject(): "
1037                                 <<"id="<<id<<" not found"<<std::endl;
1038                 return;
1039         }
1040         obj->removeFromScene();
1041         delete obj;
1042         m_active_objects.remove(id);
1043 }
1044
1045 void ClientEnvironment::processActiveObjectMessage(u16 id,
1046                 const std::string &data)
1047 {
1048         ClientActiveObject* obj = getActiveObject(id);
1049         if(obj == NULL)
1050         {
1051                 dstream<<"WARNING: ClientEnvironment::processActiveObjectMessage():"
1052                                 <<" got message for id="<<id<<", which doesn't exist."
1053                                 <<std::endl;
1054                 return;
1055         }
1056         obj->processMessage(data);
1057 }
1058
1059 #endif // #ifndef SERVER
1060
1061