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(3),
 193         m_send_recommended_timer(0)
 194 {
 195 }
 196
 197 ServerEnvironment::~ServerEnvironment()
 198 {
 199         // Drop/delete map
 200         m_map->drop();
 201 }
 202
 203 void ServerEnvironment::serializePlayers(const std::string &savedir)
 204 {
 205         std::string players_path = savedir + "/players";
 206         fs::CreateDir(players_path);
 207
 208         core::map<Player*, bool> saved_players;
 209
 210         std::vector<fs::DirListNode> player_files = fs::GetDirListing(players_path);
 211         for(u32 i=0; i<player_files.size(); i++)
 212         {
 213                 if(player_files[i].dir)
 214                         continue;
 215
 216                 // Full path to this file
 217                 std::string path = players_path + "/" + player_files[i].name;
 218
 219                 //dstream<<"Checking player file "<<path<<std::endl;
 220
 221                 // Load player to see what is its name
 222                 ServerRemotePlayer testplayer;
 223                 {
 224                         // Open file and deserialize
 225                         std::ifstream is(path.c_str(), std::ios_base::binary);
 226                         if(is.good() == false)
 227                         {
 228                                 dstream<<"Failed to read "<<path<<std::endl;
 229                                 continue;
 230                         }
 231                         testplayer.deSerialize(is);
 232                 }
 233
 234                 //dstream<<"Loaded test player with name "<<testplayer.getName()<<std::endl;
 235
 236                 // Search for the player
 237                 std::string playername = testplayer.getName();
 238                 Player *player = getPlayer(playername.c_str());
 239                 if(player == NULL)
 240                 {
 241                         dstream<<"Didn't find matching player, ignoring file "<<path<<std::endl;
 242                         continue;
 243                 }
 244
 245                 //dstream<<"Found matching player, overwriting."<<std::endl;
 246
 247                 // OK, found. Save player there.
 248                 {
 249                         // Open file and serialize
 250                         std::ofstream os(path.c_str(), std::ios_base::binary);
 251                         if(os.good() == false)
 252                         {
 253                                 dstream<<"Failed to overwrite "<<path<<std::endl;
 254                                 continue;
 255                         }
 256                         player->serialize(os);
 257                         saved_players.insert(player, true);
 258                 }
 259         }
 260
 261         for(core::list<Player*>::Iterator i = m_players.begin();
 262                         i != m_players.end(); i++)
 263         {
 264                 Player *player = *i;
 265                 if(saved_players.find(player) != NULL)
 266                 {
 267                         /*dstream<<"Player "<<player->getName()
 268                                         <<" was already saved."<<std::endl;*/
 269                         continue;
 270                 }
 271                 std::string playername = player->getName();
 272                 // Don't save unnamed player
 273                 if(playername == "")
 274                 {
 275                         //dstream<<"Not saving unnamed player."<<std::endl;
 276                         continue;
 277                 }
 278                 /*
 279                         Find a sane filename
 280                 */
 281                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS) == false)
 282                         playername = "player";
 283                 std::string path = players_path + "/" + playername;
 284                 bool found = false;
 285                 for(u32 i=0; i<1000; i++)
 286                 {
 287                         if(fs::PathExists(path) == false)
 288                         {
 289                                 found = true;
 290                                 break;
 291                         }
 292                         path = players_path + "/" + playername + itos(i);
 293                 }
 294                 if(found == false)
 295                 {
 296                         dstream<<"WARNING: Didn't find free file for player"<<std::endl;
 297                         continue;
 298                 }
 299
 300                 {
 301                         /*dstream<<"Saving player "<<player->getName()<<" to "
 302                                         <<path<<std::endl;*/
 303                         // Open file and serialize
 304                         std::ofstream os(path.c_str(), std::ios_base::binary);
 305                         if(os.good() == false)
 306                         {
 307                                 dstream<<"WARNING: Failed to overwrite "<<path<<std::endl;
 308                                 continue;
 309                         }
 310                         player->serialize(os);
 311                         saved_players.insert(player, true);
 312                 }
 313         }
 314
 315         //dstream<<"Saved "<<saved_players.size()<<" players."<<std::endl;
 316 }
 317
 318 void ServerEnvironment::deSerializePlayers(const std::string &savedir)
 319 {
 320         std::string players_path = savedir + "/players";
 321
 322         core::map<Player*, bool> saved_players;
 323
 324         std::vector<fs::DirListNode> player_files = fs::GetDirListing(players_path);
 325         for(u32 i=0; i<player_files.size(); i++)
 326         {
 327                 if(player_files[i].dir)
 328                         continue;
 329
 330                 // Full path to this file
 331                 std::string path = players_path + "/" + player_files[i].name;
 332
 333                 dstream<<"Checking player file "<<path<<std::endl;
 334
 335                 // Load player to see what is its name
 336                 ServerRemotePlayer testplayer;
 337                 {
 338                         // Open file and deserialize
 339                         std::ifstream is(path.c_str(), std::ios_base::binary);
 340                         if(is.good() == false)
 341                         {
 342                                 dstream<<"Failed to read "<<path<<std::endl;
 343                                 continue;
 344                         }
 345                         testplayer.deSerialize(is);
 346                 }
 347
 348                 dstream<<"Loaded test player with name "<<testplayer.getName()<<std::endl;
 349
 350                 // Search for the player
 351                 std::string playername = testplayer.getName();
 352                 Player *player = getPlayer(playername.c_str());
 353                 bool newplayer = false;
 354                 if(player == NULL)
 355                 {
 356                         dstream<<"Is a new player"<<std::endl;
 357                         player = new ServerRemotePlayer();
 358                         newplayer = true;
 359                 }
 360
 361                 // Load player
 362                 {
 363                         dstream<<"Reading player "<<testplayer.getName()<<" from "
 364                                         <<path<<std::endl;
 365                         // Open file and deserialize
 366                         std::ifstream is(path.c_str(), std::ios_base::binary);
 367                         if(is.good() == false)
 368                         {
 369                                 dstream<<"Failed to read "<<path<<std::endl;
 370                                 continue;
 371                         }
 372                         player->deSerialize(is);
 373                 }
 374
 375                 if(newplayer)
 376                         addPlayer(player);
 377         }
 378 }
 379
 380 void ServerEnvironment::step(float dtime)
 381 {
 382         DSTACK(__FUNCTION_NAME);
 383
 384         // Get some settings
 385         //bool free_move = g_settings.getBool("free_move");
 386         bool footprints = g_settings.getBool("footprints");
 387
 388         {
 389                 //TimeTaker timer("Server m_map->timerUpdate()", g_device);
 390                 m_map->timerUpdate(dtime);
 391         }
 392
 393         /*
 394                 Handle players
 395         */
 396         for(core::list<Player*>::Iterator i = m_players.begin();
 397                         i != m_players.end(); i++)
 398         {
 399                 Player *player = *i;
 400                 v3f playerpos = player->getPosition();
 401
 402                 // Move
 403                 player->move(dtime, *m_map, 100*BS);
 404
 405                 /*
 406                         Add footsteps to grass
 407                 */
 408                 if(footprints)
 409                 {
 410                         // Get node that is at BS/4 under player
 411                         v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0), BS);
 412                         try{
 413                                 MapNode n = m_map->getNode(bottompos);
 414                                 if(n.d == CONTENT_GRASS)
 415                                 {
 416                                         n.d = CONTENT_GRASS_FOOTSTEPS;
 417                                         m_map->setNode(bottompos, n);
 418                                 }
 419                         }
 420                         catch(InvalidPositionException &e)
 421                         {
 422                         }
 423                 }
 424         }
 425
 426         /*
 427                 Step active objects
 428         */
 429
 430         bool send_recommended = false;
 431         m_send_recommended_timer += dtime;
 432         if(m_send_recommended_timer > 0.2)
 433         {
 434                 m_send_recommended_timer = 0;
 435                 send_recommended = true;
 436         }
 437
 438         for(core::map<u16, ServerActiveObject*>::Iterator
 439                         i = m_active_objects.getIterator();
 440                         i.atEnd()==false; i++)
 441         {
 442                 ServerActiveObject* obj = i.getNode()->getValue();
 443                 // Step object, putting messages directly to the queue
 444                 obj->step(dtime, m_active_object_messages, send_recommended);
 445         }
 446
 447         /*
 448                 Remove objects that satisfy (m_removed && m_known_by_count==0)
 449         */
 450         {
 451                 core::list<u16> objects_to_remove;
 452                 for(core::map<u16, ServerActiveObject*>::Iterator
 453                                 i = m_active_objects.getIterator();
 454                                 i.atEnd()==false; i++)
 455                 {
 456                         u16 id = i.getNode()->getKey();
 457                         ServerActiveObject* obj = i.getNode()->getValue();
 458                         // This shouldn't happen but check it
 459                         if(obj == NULL)
 460                         {
 461                                 dstream<<"WARNING: NULL object found in ServerEnvironment"
 462                                                 <<" while finding removed objects. id="<<id<<std::endl;
 463                                 // Id to be removed from m_active_objects
 464                                 objects_to_remove.push_back(id);
 465                                 continue;
 466                         }
 467                         // If not m_removed, don't remove.
 468                         if(obj->m_removed == false)
 469                                 continue;
 470                         // Delete static data from block
 471                         if(obj->m_static_exists)
 472                         {
 473                                 MapBlock *block = m_map->getBlockNoCreateNoEx(obj->m_static_block);
 474                                 if(block)
 475                                 {
 476                                         block->m_static_objects.remove(id);
 477                                         block->setChangedFlag();
 478                                 }
 479                         }
 480                         // If m_known_by_count > 0, don't actually remove.
 481                         if(obj->m_known_by_count > 0)
 482                                 continue;
 483                         // Delete
 484                         delete obj;
 485                         // Id to be removed from m_active_objects
 486                         objects_to_remove.push_back(id);
 487                 }
 488                 // Remove references from m_active_objects
 489                 for(core::list<u16>::Iterator i = objects_to_remove.begin();
 490                                 i != objects_to_remove.end(); i++)
 491                 {
 492                         m_active_objects.remove(*i);
 493                 }
 494         }
 495
 496
 497         const s16 to_active_max_blocks = 3;
 498         const f32 to_static_max_f = (to_active_max_blocks+1)*MAP_BLOCKSIZE*BS;
 499
 500         /*
 501                 Convert stored objects from blocks near the players to active.
 502         */
 503         for(core::list<Player*>::Iterator i = m_players.begin();
 504                         i != m_players.end(); i++)
 505         {
 506                 Player *player = *i;
 507                 v3f playerpos = player->getPosition();
 508
 509                 v3s16 blockpos0 = getNodeBlockPos(floatToInt(playerpos, BS));
 510                 v3s16 bpmin = blockpos0 - v3s16(1,1,1)*to_active_max_blocks;
 511                 v3s16 bpmax = blockpos0 + v3s16(1,1,1)*to_active_max_blocks;
 512                 // Loop through all nearby blocks
 513                 for(s16 x=bpmin.X; x<=bpmax.X; x++)
 514                 for(s16 y=bpmin.Y; y<=bpmax.Y; y++)
 515                 for(s16 z=bpmin.Z; z<=bpmax.Z; z++)
 516                 {
 517                         v3s16 blockpos(x,y,z);
 518                         MapBlock *block = m_map->getBlockNoCreateNoEx(blockpos);
 519                         if(block==NULL)
 520                                 continue;
 521                         // Ignore if no stored objects (to not set changed flag)
 522                         if(block->m_static_objects.m_stored.size() == 0)
 523                                 continue;
 524                         // This will contain the leftovers of the stored list
 525                         core::list<StaticObject> new_stored;
 526                         // Loop through stored static objects
 527                         for(core::list<StaticObject>::Iterator
 528                                         i = block->m_static_objects.m_stored.begin();
 529                                         i != block->m_static_objects.m_stored.end(); i++)
 530                         {
 531                                 dstream<<"INFO: Server: Creating an active object from "
 532                                                 <<"static data"<<std::endl;
 533                                 StaticObject &s_obj = *i;
 534                                 // Create an active object from the data
 535                                 ServerActiveObject *obj = ServerActiveObject::create
 536                                                 (s_obj.type, this, 0, s_obj.pos, s_obj.data);
 537                                 if(obj==NULL)
 538                                 {
 539                                         // This is necessary to preserve stuff during bugs
 540                                         // and errors
 541                                         new_stored.push_back(s_obj);
 542                                         continue;
 543                                 }
 544                                 // This will also add the object to the active static list
 545                                 addActiveObject(obj);
 546                                 //u16 id = addActiveObject(obj);
 547                         }
 548                         // Clear stored list
 549                         block->m_static_objects.m_stored.clear();
 550                         // Add leftover stuff to stored list
 551                         for(core::list<StaticObject>::Iterator
 552                                         i = new_stored.begin();
 553                                         i != new_stored.end(); i++)
 554                         {
 555                                 StaticObject &s_obj = *i;
 556                                 block->m_static_objects.m_stored.push_back(s_obj);
 557                         }
 558                         block->setChangedFlag();
 559                 }
 560         }
 561
 562         /*
 563                 Convert objects that are far away from all the players to static.
 564         */
 565         {
 566                 core::list<u16> objects_to_remove;
 567                 for(core::map<u16, ServerActiveObject*>::Iterator
 568                                 i = m_active_objects.getIterator();
 569                                 i.atEnd()==false; i++)
 570                 {
 571                         ServerActiveObject* obj = i.getNode()->getValue();
 572                         u16 id = i.getNode()->getKey();
 573                         v3f objectpos = obj->getBasePosition();
 574
 575                         // This shouldn't happen but check it
 576                         if(obj == NULL)
 577                         {
 578                                 dstream<<"WARNING: NULL object found in ServerEnvironment"
 579                                                 <<std::endl;
 580                                 continue;
 581                         }
 582                         // If known by some client, don't convert to static.
 583                         if(obj->m_known_by_count > 0)
 584                                 continue;
 585
 586                         // If close to some player, don't convert to static.
 587                         bool close_to_player = false;
 588                         for(core::list<Player*>::Iterator i = m_players.begin();
 589                                         i != m_players.end(); i++)
 590                         {
 591                                 Player *player = *i;
 592                                 v3f playerpos = player->getPosition();
 593                                 f32 d = playerpos.getDistanceFrom(objectpos);
 594                                 if(d < to_static_max_f)
 595                                 {
 596                                         close_to_player = true;
 597                                         break;
 598                                 }
 599                         }
 600
 601                         if(close_to_player)
 602                                 continue;
 603
 604                         /*
 605                                 Update the static data and remove the active object.
 606                         */
 607
 608                         // Delete old static object
 609                         MapBlock *oldblock = NULL;
 610                         if(obj->m_static_exists)
 611                         {
 612                                 MapBlock *block = m_map->getBlockNoCreateNoEx(obj->m_static_block);
 613                                 if(block)
 614                                 {
 615                                         block->m_static_objects.remove(id);
 616                                         oldblock = block;
 617                                 }
 618                         }
 619                         // Add new static object
 620                         std::string staticdata = obj->getStaticData();
 621                         StaticObject s_obj(obj->getType(), objectpos, staticdata);
 622                         // Add to the block where the object is located in
 623                         v3s16 blockpos = getNodeBlockPos(floatToInt(objectpos, BS));
 624                         MapBlock *block = m_map->getBlockNoCreateNoEx(blockpos);
 625                         if(block)
 626                         {
 627                                 block->m_static_objects.insert(0, s_obj);
 628                                 block->setChangedFlag();
 629                                 obj->m_static_exists = true;
 630                                 obj->m_static_block = block->getPos();
 631                         }
 632                         // If not possible, add back to previous block
 633                         else if(oldblock)
 634                         {
 635                                 oldblock->m_static_objects.insert(0, s_obj);
 636                                 oldblock->setChangedFlag();
 637                                 obj->m_static_exists = true;
 638                                 obj->m_static_block = oldblock->getPos();
 639                         }
 640                         else{
 641                                 dstream<<"WARNING: Server: Could not find a block for "
 642                                                 <<"storing static object"<<std::endl;
 643                                 obj->m_static_exists = false;
 644                                 continue;
 645                         }
 646                         // Delete active object
 647                         dstream<<"INFO: Server: Stored static data. Deleting object."
 648                                         <<std::endl;
 649                         delete obj;
 650                         // Id to be removed from m_active_objects
 651                         objects_to_remove.push_back(id);
 652                 }
 653                 // Remove references from m_active_objects
 654                 for(core::list<u16>::Iterator i = objects_to_remove.begin();
 655                                 i != objects_to_remove.end(); i++)
 656                 {
 657                         m_active_objects.remove(*i);
 658                 }
 659         }
 660
 661         if(g_settings.getBool("enable_experimental"))
 662         {
 663
 664         /*
 665                 TEST CODE
 666         */
 667 #if 1
 668         m_random_spawn_timer -= dtime;
 669         if(m_random_spawn_timer < 0)
 670         {
 671                 //m_random_spawn_timer += myrand_range(2.0, 20.0);
 672                 //m_random_spawn_timer += 2.0;
 673                 m_random_spawn_timer += 200.0;
 674
 675                 /*
 676                         Find some position
 677                 */
 678
 679                 /*v2s16 p2d(myrand_range(-5,5), myrand_range(-5,5));
 680                 s16 y = 1 + getServerMap().findGroundLevel(p2d);
 681                 v3f pos(p2d.X*BS,y*BS,p2d.Y*BS);*/
 682
 683                 Player *player = getRandomConnectedPlayer();
 684                 v3f pos(0,0,0);
 685                 if(player)
 686                         pos = player->getPosition();
 687                 pos += v3f(
 688                         myrand_range(-3,3)*BS,
 689                         0,
 690                         myrand_range(-3,3)*BS
 691                 );
 692
 693                 /*
 694                         Create a ServerActiveObject
 695                 */
 696
 697                 //TestSAO *obj = new TestSAO(this, 0, pos);
 698                 //ServerActiveObject *obj = new ItemSAO(this, 0, pos, "CraftItem Stick 1");
 699                 ServerActiveObject *obj = new RatSAO(this, 0, pos);
 700                 addActiveObject(obj);
 701         }
 702 #endif
 703
 704         } // enable_experimental
 705 }
 706
 707 ServerActiveObject* ServerEnvironment::getActiveObject(u16 id)
 708 {
 709         core::map<u16, ServerActiveObject*>::Node *n;
 710         n = m_active_objects.find(id);
 711         if(n == NULL)
 712                 return NULL;
 713         return n->getValue();
 714 }
 715
 716 bool isFreeServerActiveObjectId(u16 id,
 717                 core::map<u16, ServerActiveObject*> &objects)
 718 {
 719         if(id == 0)
 720                 return false;
 721
 722         for(core::map<u16, ServerActiveObject*>::Iterator
 723                         i = objects.getIterator();
 724                         i.atEnd()==false; i++)
 725         {
 726                 if(i.getNode()->getKey() == id)
 727                         return false;
 728         }
 729         return true;
 730 }
 731
 732 u16 getFreeServerActiveObjectId(
 733                 core::map<u16, ServerActiveObject*> &objects)
 734 {
 735         u16 new_id = 1;
 736         for(;;)
 737         {
 738                 if(isFreeServerActiveObjectId(new_id, objects))
 739                         return new_id;
 740
 741                 if(new_id == 65535)
 742                         return 0;
 743
 744                 new_id++;
 745         }
 746 }
 747
 748 u16 ServerEnvironment::addActiveObject(ServerActiveObject *object)
 749 {
 750         assert(object);
 751         if(object->getId() == 0)
 752         {
 753                 u16 new_id = getFreeServerActiveObjectId(m_active_objects);
 754                 if(new_id == 0)
 755                 {
 756                         dstream<<"WARNING: ServerEnvironment::addActiveObject(): "
 757                                         <<"no free ids available"<<std::endl;
 758                         delete object;
 759                         return 0;
 760                 }
 761                 object->setId(new_id);
 762         }
 763         if(isFreeServerActiveObjectId(object->getId(), m_active_objects) == false)
 764         {
 765                 dstream<<"WARNING: ServerEnvironment::addActiveObject(): "
 766                                 <<"id is not free ("<<object->getId()<<")"<<std::endl;
 767                 delete object;
 768                 return 0;
 769         }
 770         dstream<<"INGO: ServerEnvironment::addActiveObject(): "
 771                         <<"added (id="<<object->getId()<<")"<<std::endl;
 772
 773         m_active_objects.insert(object->getId(), object);
 774
 775         // Add static object to active static list of the block
 776         v3f objectpos = object->getBasePosition();
 777         std::string staticdata = object->getStaticData();
 778         StaticObject s_obj(object->getType(), objectpos, staticdata);
 779         // Add to the block where the object is located in
 780         v3s16 blockpos = getNodeBlockPos(floatToInt(objectpos, BS));
 781         MapBlock *block = m_map->getBlockNoCreateNoEx(blockpos);
 782         if(block)
 783         {
 784                 block->m_static_objects.m_active.insert(object->getId(), s_obj);
 785                 object->m_static_exists = true;
 786                 object->m_static_block = blockpos;
 787         }
 788         else{
 789                 dstream<<"WARNING: Server: Could not find a block for "
 790                                 <<"storing newly added static active object"<<std::endl;
 791         }
 792
 793         return object->getId();
 794 }
 795
 796 /*
 797         Finds out what new objects have been added to
 798         inside a radius around a position
 799 */
 800 void ServerEnvironment::getAddedActiveObjects(v3s16 pos, s16 radius,
 801                 core::map<u16, bool> &current_objects,
 802                 core::map<u16, bool> &added_objects)
 803 {
 804         v3f pos_f = intToFloat(pos, BS);
 805         f32 radius_f = radius * BS;
 806         /*
 807                 Go through the object list,
 808                 - discard m_removed objects,
 809                 - discard objects that are too far away,
 810                 - discard objects that are found in current_objects.
 811                 - add remaining objects to added_objects
 812         */
 813         for(core::map<u16, ServerActiveObject*>::Iterator
 814                         i = m_active_objects.getIterator();
 815                         i.atEnd()==false; i++)
 816         {
 817                 u16 id = i.getNode()->getKey();
 818                 // Get object
 819                 ServerActiveObject *object = i.getNode()->getValue();
 820                 if(object == NULL)
 821                         continue;
 822                 // Discard if removed
 823                 if(object->m_removed)
 824                         continue;
 825                 // Discard if too far
 826                 f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
 827                 if(distance_f > radius_f)
 828                         continue;
 829                 // Discard if already on current_objects
 830                 core::map<u16, bool>::Node *n;
 831                 n = current_objects.find(id);
 832                 if(n != NULL)
 833                         continue;
 834                 // Add to added_objects
 835                 added_objects.insert(id, false);
 836         }
 837 }
 838
 839 /*
 840         Finds out what objects have been removed from
 841         inside a radius around a position
 842 */
 843 void ServerEnvironment::getRemovedActiveObjects(v3s16 pos, s16 radius,
 844                 core::map<u16, bool> &current_objects,
 845                 core::map<u16, bool> &removed_objects)
 846 {
 847         v3f pos_f = intToFloat(pos, BS);
 848         f32 radius_f = radius * BS;
 849         /*
 850                 Go through current_objects; object is removed if:
 851                 - object is not found in m_active_objects (this is actually an
 852                   error condition; objects should be set m_removed=true and removed
 853                   only after all clients have been informed about removal), or
 854                 - object has m_removed=true, or
 855                 - object is too far away
 856         */
 857         for(core::map<u16, bool>::Iterator
 858                         i = current_objects.getIterator();
 859                         i.atEnd()==false; i++)
 860         {
 861                 u16 id = i.getNode()->getKey();
 862                 ServerActiveObject *object = getActiveObject(id);
 863                 if(object == NULL)
 864                 {
 865                         dstream<<"WARNING: ServerEnvironment::getRemovedActiveObjects():"
 866                                         <<" object in current_objects is NULL"<<std::endl;
 867                 }
 868                 else if(object->m_removed == false)
 869                 {
 870                         f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
 871                         /*dstream<<"removed == false"
 872                                         <<"distance_f = "<<distance_f
 873                                         <<", radius_f = "<<radius_f<<std::endl;*/
 874                         if(distance_f < radius_f)
 875                         {
 876                                 // Not removed
 877                                 continue;
 878                         }
 879                 }
 880                 removed_objects.insert(id, false);
 881         }
 882 }
 883
 884 ActiveObjectMessage ServerEnvironment::getActiveObjectMessage()
 885 {
 886         if(m_active_object_messages.size() == 0)
 887                 return ActiveObjectMessage(0);
 888
 889         return m_active_object_messages.pop_front();
 890 }
 891
 892 #ifndef SERVER
 893
 894 /*
 895         ClientEnvironment
 896 */
 897
 898 ClientEnvironment::ClientEnvironment(ClientMap *map, scene::ISceneManager *smgr):
 899         m_map(map),
 900         m_smgr(smgr)
 901 {
 902         assert(m_map);
 903         assert(m_smgr);
 904 }
 905
 906 ClientEnvironment::~ClientEnvironment()
 907 {
 908         // delete active objects
 909         for(core::map<u16, ClientActiveObject*>::Iterator
 910                         i = m_active_objects.getIterator();
 911                         i.atEnd()==false; i++)
 912         {
 913                 delete i.getNode()->getValue();
 914         }
 915
 916         // Drop/delete map
 917         m_map->drop();
 918 }
 919
 920 void ClientEnvironment::addPlayer(Player *player)
 921 {
 922         DSTACK(__FUNCTION_NAME);
 923         /*
 924                 It is a failure if player is local and there already is a local
 925                 player
 926         */
 927         assert(!(player->isLocal() == true && getLocalPlayer() != NULL));
 928
 929         Environment::addPlayer(player);
 930 }
 931
 932 LocalPlayer * ClientEnvironment::getLocalPlayer()
 933 {
 934         for(core::list<Player*>::Iterator i = m_players.begin();
 935                         i != m_players.end(); i++)
 936         {
 937                 Player *player = *i;
 938                 if(player->isLocal())
 939                         return (LocalPlayer*)player;
 940         }
 941         return NULL;
 942 }
 943
 944 void ClientEnvironment::step(float dtime)
 945 {
 946         DSTACK(__FUNCTION_NAME);
 947
 948         // Get some settings
 949         bool free_move = g_settings.getBool("free_move");
 950         bool footprints = g_settings.getBool("footprints");
 951
 952         {
 953                 //TimeTaker timer("Client m_map->timerUpdate()", g_device);
 954                 m_map->timerUpdate(dtime);
 955         }
 956
 957         /*
 958                 Get the speed the player is going
 959         */
 960         f32 player_speed = 0.001; // just some small value
 961         LocalPlayer *lplayer = getLocalPlayer();
 962         if(lplayer)
 963                 player_speed = lplayer->getSpeed().getLength();
 964
 965         /*
 966                 Maximum position increment
 967         */
 968         //f32 position_max_increment = 0.05*BS;
 969         f32 position_max_increment = 0.1*BS;
 970
 971         // Maximum time increment (for collision detection etc)
 972         // time = distance / speed
 973         f32 dtime_max_increment = position_max_increment / player_speed;
 974
 975         // Maximum time increment is 10ms or lower
 976         if(dtime_max_increment > 0.01)
 977                 dtime_max_increment = 0.01;
 978
 979         // Don't allow overly huge dtime
 980         if(dtime > 0.5)
 981                 dtime = 0.5;
 982
 983         f32 dtime_downcount = dtime;
 984
 985         /*
 986                 Stuff that has a maximum time increment
 987         */
 988
 989         u32 loopcount = 0;
 990         do
 991         {
 992                 loopcount++;
 993
 994                 f32 dtime_part;
 995                 if(dtime_downcount > dtime_max_increment)
 996                 {
 997                         dtime_part = dtime_max_increment;
 998                         dtime_downcount -= dtime_part;
 999                 }
1000                 else
1001                 {
1002                         dtime_part = dtime_downcount;
1003                         /*
1004                                 Setting this to 0 (no -=dtime_part) disables an infinite loop
1005                                 when dtime_part is so small that dtime_downcount -= dtime_part
1006                                 does nothing
1007                         */
1008                         dtime_downcount = 0;
1009                 }
1010
1011                 /*
1012                         Handle local player
1013                 */
1014
1015                 {
1016                         Player *player = getLocalPlayer();
1017
1018                         v3f playerpos = player->getPosition();
1019
1020                         // Apply physics
1021                         if(free_move == false)
1022                         {
1023                                 // Gravity
1024                                 v3f speed = player->getSpeed();
1025                                 if(player->swimming_up == false)
1026                                         speed.Y -= 9.81 * BS * dtime_part * 2;
1027
1028                                 // Water resistance
1029                                 if(player->in_water_stable || player->in_water)
1030                                 {
1031                                         f32 max_down = 2.0*BS;
1032                                         if(speed.Y < -max_down) speed.Y = -max_down;
1033
1034                                         f32 max = 2.5*BS;
1035                                         if(speed.getLength() > max)
1036                                         {
1037                                                 speed = speed / speed.getLength() * max;
1038                                         }
1039                                 }
1040
1041                                 player->setSpeed(speed);
1042                         }
1043
1044                         /*
1045                                 Move the player.
1046                                 This also does collision detection.
1047                         */
1048                         player->move(dtime_part, *m_map, position_max_increment);
1049                 }
1050         }
1051         while(dtime_downcount > 0.001);
1052
1053         //std::cout<<"Looped "<<loopcount<<" times."<<std::endl;
1054
1055         /*
1056                 Stuff that can be done in an arbitarily large dtime
1057         */
1058         for(core::list<Player*>::Iterator i = m_players.begin();
1059                         i != m_players.end(); i++)
1060         {
1061                 Player *player = *i;
1062                 v3f playerpos = player->getPosition();
1063
1064                 /*
1065                         Handle non-local players
1066                 */
1067                 if(player->isLocal() == false)
1068                 {
1069                         // Move
1070                         player->move(dtime, *m_map, 100*BS);
1071
1072                         // Update lighting on remote players on client
1073                         u8 light = LIGHT_MAX;
1074                         try{
1075                                 // Get node at head
1076                                 v3s16 p = floatToInt(playerpos + v3f(0,BS+BS/2,0), BS);
1077                                 MapNode n = m_map->getNode(p);
1078                                 light = n.getLightBlend(m_daynight_ratio);
1079                         }
1080                         catch(InvalidPositionException &e) {}
1081                         player->updateLight(light);
1082                 }
1083
1084                 /*
1085                         Add footsteps to grass
1086                 */
1087                 if(footprints)
1088                 {
1089                         // Get node that is at BS/4 under player
1090                         v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0), BS);
1091                         try{
1092                                 MapNode n = m_map->getNode(bottompos);
1093                                 if(n.d == CONTENT_GRASS)
1094                                 {
1095                                         n.d = CONTENT_GRASS_FOOTSTEPS;
1096                                         m_map->setNode(bottompos, n);
1097                                         // Update mesh on client
1098                                         if(m_map->mapType() == MAPTYPE_CLIENT)
1099                                         {
1100                                                 v3s16 p_blocks = getNodeBlockPos(bottompos);
1101                                                 MapBlock *b = m_map->getBlockNoCreate(p_blocks);
1102                                                 //b->updateMesh(m_daynight_ratio);
1103                                                 b->setMeshExpired(true);
1104                                         }
1105                                 }
1106                         }
1107                         catch(InvalidPositionException &e)
1108                         {
1109                         }
1110                 }
1111         }
1112
1113         /*
1114                 Step active objects
1115         */
1116
1117         for(core::map<u16, ClientActiveObject*>::Iterator
1118                         i = m_active_objects.getIterator();
1119                         i.atEnd()==false; i++)
1120         {
1121                 ClientActiveObject* obj = i.getNode()->getValue();
1122                 // Step object
1123                 obj->step(dtime, this);
1124         }
1125 }
1126
1127 void ClientEnvironment::updateMeshes(v3s16 blockpos)
1128 {
1129         m_map->updateMeshes(blockpos, m_daynight_ratio);
1130 }
1131
1132 void ClientEnvironment::expireMeshes(bool only_daynight_diffed)
1133 {
1134         m_map->expireMeshes(only_daynight_diffed);
1135 }
1136
1137 ClientActiveObject* ClientEnvironment::getActiveObject(u16 id)
1138 {
1139         core::map<u16, ClientActiveObject*>::Node *n;
1140         n = m_active_objects.find(id);
1141         if(n == NULL)
1142                 return NULL;
1143         return n->getValue();
1144 }
1145
1146 bool isFreeClientActiveObjectId(u16 id,
1147                 core::map<u16, ClientActiveObject*> &objects)
1148 {
1149         if(id == 0)
1150                 return false;
1151
1152         for(core::map<u16, ClientActiveObject*>::Iterator
1153                         i = objects.getIterator();
1154                         i.atEnd()==false; i++)
1155         {
1156                 if(i.getNode()->getKey() == id)
1157                         return false;
1158         }
1159         return true;
1160 }
1161
1162 u16 getFreeClientActiveObjectId(
1163                 core::map<u16, ClientActiveObject*> &objects)
1164 {
1165         u16 new_id = 1;
1166         for(;;)
1167         {
1168                 if(isFreeClientActiveObjectId(new_id, objects))
1169                         return new_id;
1170
1171                 if(new_id == 65535)
1172                         return 0;
1173
1174                 new_id++;
1175         }
1176 }
1177
1178 u16 ClientEnvironment::addActiveObject(ClientActiveObject *object)
1179 {
1180         assert(object);
1181         if(object->getId() == 0)
1182         {
1183                 u16 new_id = getFreeClientActiveObjectId(m_active_objects);
1184                 if(new_id == 0)
1185                 {
1186                         dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
1187                                         <<"no free ids available"<<std::endl;
1188                         delete object;
1189                         return 0;
1190                 }
1191                 object->setId(new_id);
1192         }
1193         if(isFreeClientActiveObjectId(object->getId(), m_active_objects) == false)
1194         {
1195                 dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
1196                                 <<"id is not free ("<<object->getId()<<")"<<std::endl;
1197                 delete object;
1198                 return 0;
1199         }
1200         dstream<<"INGO: ClientEnvironment::addActiveObject(): "
1201                         <<"added (id="<<object->getId()<<")"<<std::endl;
1202         m_active_objects.insert(object->getId(), object);
1203         object->addToScene(m_smgr);
1204         return object->getId();
1205 }
1206
1207 void ClientEnvironment::addActiveObject(u16 id, u8 type,
1208                 const std::string &init_data)
1209 {
1210         ClientActiveObject* obj = ClientActiveObject::create(type);
1211         if(obj == NULL)
1212         {
1213                 dstream<<"WARNING: ClientEnvironment::addActiveObject(): "
1214                                 <<"id="<<id<<" type="<<type<<": Couldn't create object"
1215                                 <<std::endl;
1216                 return;
1217         }
1218
1219         obj->setId(id);
1220
1221         addActiveObject(obj);
1222
1223         obj->initialize(init_data);
1224 }
1225
1226 void ClientEnvironment::removeActiveObject(u16 id)
1227 {
1228         dstream<<"ClientEnvironment::removeActiveObject(): "
1229                         <<"id="<<id<<std::endl;
1230         ClientActiveObject* obj = getActiveObject(id);
1231         if(obj == NULL)
1232         {
1233                 dstream<<"WARNING: ClientEnvironment::removeActiveObject(): "
1234                                 <<"id="<<id<<" not found"<<std::endl;
1235                 return;
1236         }
1237         obj->removeFromScene();
1238         delete obj;
1239         m_active_objects.remove(id);
1240 }
1241
1242 void ClientEnvironment::processActiveObjectMessage(u16 id,
1243                 const std::string &data)
1244 {
1245         ClientActiveObject* obj = getActiveObject(id);
1246         if(obj == NULL)
1247         {
1248                 dstream<<"WARNING: ClientEnvironment::processActiveObjectMessage():"
1249                                 <<" got message for id="<<id<<", which doesn't exist."
1250                                 <<std::endl;
1251                 return;
1252         }
1253         obj->processMessage(data);
1254 }
1255
1256 void ClientEnvironment::getActiveObjects(v3f origin, f32 max_d,
1257                 core::array<DistanceSortedActiveObject> &dest)
1258 {
1259         for(core::map<u16, ClientActiveObject*>::Iterator
1260                         i = m_active_objects.getIterator();
1261                         i.atEnd()==false; i++)
1262         {
1263                 ClientActiveObject* obj = i.getNode()->getValue();
1264
1265                 f32 d = (obj->getPosition() - origin).getLength();
1266
1267                 if(d > max_d)
1268                         continue;
1269
1270                 DistanceSortedActiveObject dso(obj, d);
1271
1272                 dest.push_back(dso);
1273         }
1274 }
1275
1276
1277 #endif // #ifndef SERVER
1278
1279