src/worldmap.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux -  A Jump'n Run
   4 //  Copyright (C) 2004 Ingo Ruhnke <grumbel@gmx.de>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #include <iostream>
  21 #include <fstream>
  22 #include <vector>
  23 #include <assert.h>
  24 #include "globals.h"
  25 #include "texture.h"
  26 #include "screen.h"
  27 #include "lispreader.h"
  28 #include "gameloop.h"
  29 #include "setup.h"
  30 #include "worldmap.h"
  31
  32 namespace WorldMapNS {
  33
  34 Direction reverse_dir(Direction direction)
  35 {
  36   switch(direction)
  37     {
  38     case WEST:
  39       return EAST;
  40     case EAST:
  41       return WEST;
  42     case NORTH:
  43       return SOUTH;
  44     case SOUTH:
  45       return NORTH;
  46     case NONE:
  47       return NONE;
  48     }
  49   return NONE;
  50 }
  51
  52 std::string
  53 direction_to_string(Direction direction)
  54 {
  55   switch(direction)
  56     {
  57     case WEST:
  58       return "west";
  59     case EAST:
  60       return "east";
  61     case NORTH:
  62       return "north";
  63     case SOUTH:
  64       return "south";
  65     default:
  66       return "none";
  67     }
  68 }
  69
  70 Direction
  71 string_to_direction(const std::string& directory)
  72 {
  73   if (directory == "west")
  74     return WEST;
  75   else if (directory == "east")
  76     return EAST;
  77   else if (directory == "north")
  78     return NORTH;
  79   else if (directory == "south")
  80     return SOUTH;
  81   else
  82     return NONE;
  83 }
  84
  85 TileManager* TileManager::instance_  = 0;
  86
  87 TileManager::TileManager()
  88 {
  89   std::string stwt_filename = datadir +  "images/worldmap/antarctica.stwt";
  90   lisp_object_t* root_obj = lisp_read_from_file(stwt_filename);
  91
  92   if (!root_obj)
  93     st_abort("Couldn't load file", stwt_filename);
  94
  95   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap-tiles") == 0)
  96     {
  97       lisp_object_t* cur = lisp_cdr(root_obj);
  98
  99       while(!lisp_nil_p(cur))
 100         {
 101           lisp_object_t* element = lisp_car(cur);
 102
 103           if (strcmp(lisp_symbol(lisp_car(element)), "tile") == 0)
 104             {
 105               int id = 0;
 106               std::string filename = "<invalid>";
 107
 108               Tile* tile = new Tile;
 109               tile->north = true;
 110               tile->east  = true;
 111               tile->south = true;
 112               tile->west  = true;
 113               tile->stop  = true;
 114
 115               LispReader reader(lisp_cdr(element));
 116               reader.read_int("id",  &id);
 117               reader.read_bool("north", &tile->north);
 118               reader.read_bool("south", &tile->south);
 119               reader.read_bool("west",  &tile->west);
 120               reader.read_bool("east",  &tile->east);
 121               reader.read_bool("stop",  &tile->stop);
 122               reader.read_string("image",  &filename);
 123
 124               tile->sprite = new Surface(
 125                            datadir +  "/images/worldmap/" + filename,
 126                            USE_ALPHA);
 127
 128               if (id >= int(tiles.size()))
 129                 tiles.resize(id+1);
 130
 131               tiles[id] = tile;
 132             }
 133           else
 134             {
 135               puts("Unhandled symbol");
 136             }
 137
 138           cur = lisp_cdr(cur);
 139         }
 140     }
 141   else
 142     {
 143       assert(0);
 144     }
 145 }
 146
 147 Tile*
 148 TileManager::get(int i)
 149 {
 150   assert(i >=0 && i < int(tiles.size()));
 151   return tiles[i];
 152 }
 153
 154 Tux::Tux(WorldMap* worldmap_)
 155   : worldmap(worldmap_)
 156 {
 157   sprite = new Surface(datadir +  "/images/worldmap/tux.png", USE_ALPHA);
 158   offset = 0;
 159   moving = false;
 160   tile_pos.x = 5;
 161   tile_pos.y = 5;
 162   direction = NONE;
 163   input_direction = NONE;
 164 }
 165
 166 void
 167 Tux::draw(const Point& offset)
 168 {
 169   Point pos = get_pos();
 170   sprite->draw(pos.x + offset.x,
 171                pos.y + offset.y);
 172 }
 173
 174
 175 Point
 176 Tux::get_pos()
 177 {
 178   float x = tile_pos.x * 32;
 179   float y = tile_pos.y * 32;
 180
 181   switch(direction)
 182     {
 183     case WEST:
 184       x -= offset - 32;
 185       break;
 186     case EAST:
 187       x += offset - 32;
 188       break;
 189     case NORTH:
 190       y -= offset - 32;
 191       break;
 192     case SOUTH:
 193       y += offset - 32;
 194       break;
 195     case NONE:
 196       break;
 197     }
 198
 199   return Point((int)x, (int)y);
 200 }
 201
 202 void
 203 Tux::stop()
 204 {
 205   offset = 0;
 206   direction = NONE;
 207   moving = false;
 208 }
 209
 210 void
 211 Tux::update(float delta)
 212 {
 213   if (!moving)
 214     {
 215       if (input_direction != NONE)
 216         {
 217           WorldMap::Level* level = worldmap->at_level();
 218
 219           // We got a new direction, so lets start walking when possible
 220           Point next_tile;
 221           if ((!level || level->solved)
 222               && worldmap->path_ok(input_direction, tile_pos, &next_tile))
 223             {
 224               tile_pos = next_tile;
 225               moving = true;
 226               direction = input_direction;
 227               back_direction = reverse_dir(direction);
 228             }
 229           else if (input_direction == back_direction)
 230             {
 231               std::cout << "Back triggered" << std::endl;
 232               moving = true;
 233               direction = input_direction;
 234               tile_pos = worldmap->get_next_tile(tile_pos, direction);
 235               back_direction = reverse_dir(direction);
 236             }
 237         }
 238     }
 239   else
 240     {
 241       // Let tux walk a few pixels (20 pixel/sec)
 242       offset += 20.0f * delta;
 243
 244       if (offset > 32)
 245         { // We reached the next tile, so we check what to do now
 246           offset -= 32;
 247
 248           if (worldmap->at(tile_pos)->stop || worldmap->at_level())
 249             {
 250               stop();
 251             }
 252           else
 253             {
 254               // Walk automatically to the next tile
 255               Point next_tile;
 256               if (worldmap->path_ok(direction, tile_pos, &next_tile))
 257                 {
 258                   tile_pos = next_tile;
 259                 }
 260               else
 261                 {
 262                   puts("Tilemap data is buggy");
 263                   stop();
 264                 }
 265             }
 266         }
 267     }
 268 }
 269
 270 WorldMap::WorldMap()
 271 {
 272   tux = new Tux(this);
 273
 274   width  = 20;
 275   height = 15;
 276
 277   level_sprite = new Surface(datadir +  "/images/worldmap/levelmarker.png", USE_ALPHA);
 278   leveldot_green = new Surface(datadir +  "/images/worldmap/leveldot_green.png", USE_ALPHA);
 279   leveldot_red = new Surface(datadir +  "/images/worldmap/leveldot_red.png", USE_ALPHA);
 280
 281   input_direction = NONE;
 282   enter_level = false;
 283
 284   name = "<no file>";
 285   music = "SALCON.MOD";
 286   song = 0;
 287
 288   load_map();
 289 }
 290
 291 WorldMap::~WorldMap()
 292 {
 293   delete tux;
 294 }
 295
 296 void
 297 WorldMap::load_map()
 298 {
 299   std::string filename = datadir +  "levels/default/worldmap.stwm";
 300
 301   lisp_object_t* root_obj = lisp_read_from_file(filename);
 302   if (!root_obj)
 303     st_abort("Couldn't load file", filename);
 304
 305   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap") == 0)
 306     {
 307       lisp_object_t* cur = lisp_cdr(root_obj);
 308
 309       while(!lisp_nil_p(cur))
 310         {
 311           lisp_object_t* element = lisp_car(cur);
 312
 313           if (strcmp(lisp_symbol(lisp_car(element)), "tilemap") == 0)
 314             {
 315               LispReader reader(lisp_cdr(element));
 316               reader.read_int("width",  &width);
 317               reader.read_int("height", &height);
 318               reader.read_int_vector("data", &tilemap);
 319             }
 320           else if (strcmp(lisp_symbol(lisp_car(element)), "properties") == 0)
 321             {
 322               LispReader reader(lisp_cdr(element));
 323               reader.read_string("name",  &name);
 324               reader.read_string("music", &music);
 325             }
 326           else if (strcmp(lisp_symbol(lisp_car(element)), "levels") == 0)
 327             {
 328               lisp_object_t* cur = lisp_cdr(element);
 329
 330               while(!lisp_nil_p(cur))
 331                 {
 332                   lisp_object_t* element = lisp_car(cur);
 333
 334                   if (strcmp(lisp_symbol(lisp_car(element)), "level") == 0)
 335                     {
 336                       Level level;
 337                       LispReader reader(lisp_cdr(element));
 338                       level.solved = false;
 339
 340                       level.north = true;
 341                       level.east  = true;
 342                       level.south = true;
 343                       level.west  = true;
 344
 345                       reader.read_string("name",  &level.name);
 346                       reader.read_int("x", &level.x);
 347                       reader.read_int("y", &level.y);
 348
 349                       get_level_title(&level);   // get level's title
 350
 351                       levels.push_back(level);
 352                     }
 353
 354                   cur = lisp_cdr(cur);
 355                 }
 356             }
 357           else
 358             {
 359
 360             }
 361
 362           cur = lisp_cdr(cur);
 363         }
 364     }
 365 }
 366
 367 void WorldMap::get_level_title(Levels::pointer level)
 368 {
 369 /** get level's title */
 370 level->title = "<no title>";
 371
 372 FILE * fi;
 373 lisp_object_t* root_obj = 0;
 374 fi = fopen((datadir +  "levels/" + level->name).c_str(), "r");
 375 if (fi == NULL)
 376   {
 377   perror((datadir +  "levels/" + level->name).c_str());
 378   return;
 379   }
 380
 381 lisp_stream_t stream;
 382 lisp_stream_init_file (&stream, fi);
 383 root_obj = lisp_read (&stream);
 384
 385 if (root_obj->type == LISP_TYPE_EOF || root_obj->type == LISP_TYPE_PARSE_ERROR)
 386   {
 387   printf("World: Parse Error in file %s", level->name.c_str());
 388   }
 389
 390 if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-level") == 0)
 391   {
 392   LispReader reader(lisp_cdr(root_obj));
 393   reader.read_string("name",  &level->title);
 394   }
 395
 396 fclose(fi);
 397 }
 398
 399 void
 400 WorldMap::on_escape_press()
 401 {
 402   // Show or hide the menu
 403   if(!Menu::current())
 404     Menu::set_current(worldmap_menu);
 405   else
 406     Menu::set_current(0);
 407 }
 408
 409 void
 410 WorldMap::get_input()
 411 {
 412   enter_level = false;
 413   input_direction = NONE;
 414
 415   SDL_Event event;
 416   while (SDL_PollEvent(&event))
 417     {
 418       if (Menu::current())
 419         {
 420           Menu::current()->event(event);
 421         }
 422       else
 423         {
 424           switch(event.type)
 425             {
 426             case SDL_QUIT:
 427               st_abort("Received window close", "");
 428               break;
 429
 430             case SDL_KEYDOWN:
 431               switch(event.key.keysym.sym)
 432                 {
 433                 case SDLK_ESCAPE:
 434                   on_escape_press();
 435                   break;
 436                 case SDLK_LCTRL:
 437                 case SDLK_RETURN:
 438                   enter_level = true;
 439                   break;
 440                 default:
 441                   break;
 442                 }
 443               break;
 444
 445             case SDL_JOYAXISMOTION:
 446               if (event.jaxis.axis == joystick_keymap.x_axis)
 447                 {
 448                   if (event.jaxis.value < -joystick_keymap.dead_zone)
 449                     input_direction = WEST;
 450                   else if (event.jaxis.value > joystick_keymap.dead_zone)
 451                     input_direction = EAST;
 452                 }
 453               else if (event.jaxis.axis == joystick_keymap.y_axis)
 454                 {
 455                   if (event.jaxis.value > joystick_keymap.dead_zone)
 456                     input_direction = SOUTH;
 457                   else if (event.jaxis.value < -joystick_keymap.dead_zone)
 458                     input_direction = NORTH;
 459                 }
 460               break;
 461
 462             case SDL_JOYBUTTONDOWN:
 463               if (event.jbutton.button == joystick_keymap.b_button)
 464                 enter_level = true;
 465               else if (event.jbutton.button == joystick_keymap.start_button)
 466                 on_escape_press();
 467               break;
 468
 469             default:
 470               break;
 471             }
 472         }
 473     }
 474
 475   if (!Menu::current())
 476     {
 477       Uint8 *keystate = SDL_GetKeyState(NULL);
 478
 479       if (keystate[SDLK_LEFT])
 480         input_direction = WEST;
 481       else if (keystate[SDLK_RIGHT])
 482         input_direction = EAST;
 483       else if (keystate[SDLK_UP])
 484         input_direction = NORTH;
 485       else if (keystate[SDLK_DOWN])
 486         input_direction = SOUTH;
 487     }
 488 }
 489
 490 Point
 491 WorldMap::get_next_tile(Point pos, Direction direction)
 492 {
 493   switch(direction)
 494     {
 495     case WEST:
 496       pos.x -= 1;
 497       break;
 498     case EAST:
 499       pos.x += 1;
 500       break;
 501     case NORTH:
 502       pos.y -= 1;
 503       break;
 504     case SOUTH:
 505       pos.y += 1;
 506       break;
 507     case NONE:
 508       break;
 509     }
 510   return pos;
 511 }
 512
 513 bool
 514 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 515 {
 516   *new_pos = get_next_tile(old_pos, direction);
 517
 518   if (!(new_pos->x >= 0 && new_pos->x < width
 519         && new_pos->y >= 0 && new_pos->y < height))
 520     { // New position is outsite the tilemap
 521       return false;
 522     }
 523   else
 524     { // Check if we the tile allows us to go to new_pos
 525       switch(direction)
 526         {
 527         case WEST:
 528           return (at(old_pos)->west && at(*new_pos)->east);
 529
 530         case EAST:
 531           return (at(old_pos)->east && at(*new_pos)->west);
 532
 533         case NORTH:
 534           return (at(old_pos)->north && at(*new_pos)->south);
 535
 536         case SOUTH:
 537           return (at(old_pos)->south && at(*new_pos)->north);
 538
 539         case NONE:
 540           assert(!"path_ok() can't work if direction is NONE");
 541         }
 542       return false;
 543     }
 544 }
 545
 546 void
 547 WorldMap::update()
 548 {
 549   if (enter_level && !tux->is_moving())
 550     {
 551       Level* level = at_level();
 552       if (level)
 553         {
 554           if (level->x == tux->get_tile_pos().x &&
 555               level->y == tux->get_tile_pos().y)
 556             {
 557               std::cout << "Enter the current level: " << level->name << std::endl;;
 558               halt_music();
 559
 560               GameSession session(datadir +  "levels/" + level->name,
 561                                   1, ST_GL_LOAD_LEVEL_FILE);
 562
 563               switch (session.run())
 564                 {
 565                 case GameSession::LEVEL_FINISHED:
 566                   level->solved = true;
 567                   break;
 568                 case GameSession::LEVEL_ABORT:
 569                   // Reseting the player_status might be a worthy
 570                   // consideration, but I don't think we need it
 571                   // 'cause only the bad players will use it to
 572                   // 'cheat' a few items and that isn't necesarry a
 573                   // bad thing (ie. better they continue that way,
 574                   // then stop playing the game all together since it
 575                   // is to hard)
 576                   break;
 577                 case GameSession::GAME_OVER:
 578                   quit = true;
 579                   break;
 580                 case GameSession::NONE:
 581                   // Should never be reached
 582                   break;
 583                 }
 584
 585               play_music(song);
 586               Menu::set_current(0);
 587               if (!savegame_file.empty())
 588                 savegame(savegame_file);
 589               return;
 590             }
 591         }
 592       else
 593         {
 594           std::cout << "Nothing to enter at: "
 595                     << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 596         }
 597     }
 598   else
 599     {
 600       tux->set_direction(input_direction);
 601       tux->update(0.33f);
 602     }
 603
 604   Menu* menu = Menu::current();
 605   if(menu)
 606     {
 607       menu->action();
 608
 609       if(menu == worldmap_menu)
 610         {
 611           switch (worldmap_menu->check())
 612             {
 613             case 2: // Return to game
 614               break;
 615             case 3:
 616               if (!savegame_file.empty())
 617                 savegame(savegame_file);
 618               break;
 619
 620             case 6: // Quit Worldmap
 621               quit = true;
 622               break;
 623             }
 624         }
 625       else if(menu == options_menu)
 626         {
 627           process_options_menu();
 628         }
 629     }
 630 }
 631
 632 Tile*
 633 WorldMap::at(Point p)
 634 {
 635   assert(p.x >= 0
 636          && p.x < width
 637          && p.y >= 0
 638          && p.y < height);
 639
 640   return TileManager::instance()->get(tilemap[width * p.y + p.x]);
 641 }
 642
 643 WorldMap::Level*
 644 WorldMap::at_level()
 645 {
 646   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 647     {
 648       if (i->x == tux->get_tile_pos().x &&
 649           i->y == tux->get_tile_pos().y)
 650         return &*i;
 651     }
 652
 653   return 0;
 654 }
 655
 656
 657 void
 658 WorldMap::draw(const Point& offset)
 659 {
 660   for(int y = 0; y < height; ++y)
 661     for(int x = 0; x < width; ++x)
 662       {
 663         Tile* tile = at(Point(x, y));
 664         tile->sprite->draw(x*32 + offset.x,
 665                            y*32 + offset.y);
 666       }
 667
 668   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 669     {
 670       if (i->solved)
 671         leveldot_green->draw(i->x*32 + offset.x,
 672                              i->y*32 + offset.y);
 673       else
 674         leveldot_red->draw(i->x*32 + offset.x,
 675                            i->y*32 + offset.y);
 676     }
 677
 678   tux->draw(offset);
 679   draw_status();
 680 }
 681
 682 void
 683 WorldMap::draw_status()
 684 {
 685   char str[80];
 686   sprintf(str, "%d", player_status.score);
 687   white_text->draw("SCORE", 0, 0);
 688   gold_text->draw(str, 96, 0);
 689
 690   sprintf(str, "%d", player_status.distros);
 691   white_text->draw_align("COINS", 320-64, 0,  A_LEFT, A_TOP);
 692   gold_text->draw_align(str, 320+64, 0, A_RIGHT, A_TOP);
 693
 694   white_text->draw("LIVES", 480, 0);
 695   if (player_status.lives >= 5)
 696     {
 697       sprintf(str, "%dx", player_status.lives);
 698       gold_text->draw(str, 585, 0);
 699       tux_life->draw(565+(18*3), 0);
 700     }
 701   else
 702     {
 703       for(int i= 0; i < player_status.lives; ++i)
 704         tux_life->draw(565+(18*i),0);
 705     }
 706
 707   if (!tux->is_moving())
 708     {
 709       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 710         {
 711           if (i->x == tux->get_tile_pos().x &&
 712               i->y == tux->get_tile_pos().y)
 713             {
 714               white_text->draw_align(i->title.c_str(), screen->w/2, screen->h,  A_HMIDDLE, A_BOTTOM);
 715               break;
 716             }
 717         }
 718     }
 719 }
 720
 721 void
 722 WorldMap::display()
 723 {
 724   Menu::set_current(0);
 725
 726   quit = false;
 727
 728   song = load_song(datadir +  "/music/" + music);
 729   if(!song)
 730     st_abort("Couldn't load song ", music.c_str());
 731
 732   play_music(song);
 733
 734   while(!quit) {
 735     Point tux_pos = tux->get_pos();
 736     if (1)
 737       {
 738         offset.x = -tux_pos.x + screen->w/2;
 739         offset.y = -tux_pos.y + screen->h/2;
 740
 741         if (offset.x > 0) offset.x = 0;
 742         if (offset.y > 0) offset.y = 0;
 743
 744         if (offset.x < screen->w - width*32) offset.x = screen->w - width*32;
 745         if (offset.y < screen->h - height*32) offset.y = screen->h - height*32;
 746       }
 747
 748     draw(offset);
 749     get_input();
 750     update();
 751
 752   if(Menu::current())
 753     {
 754       Menu::current()->draw();
 755       mouse_cursor->draw();
 756     }
 757     flipscreen();
 758
 759     SDL_Delay(20);
 760   }
 761
 762   halt_music();
 763   free_music(song);
 764 }
 765
 766 void
 767 WorldMap::savegame(const std::string& filename)
 768 {
 769   std::cout << "savegame: " << filename << std::endl;
 770   std::ofstream out(filename.c_str());
 771
 772   int nb_solved_levels = 0;
 773   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 774     {
 775       if (i->solved)
 776         ++nb_solved_levels;
 777     }
 778
 779   out << "(supertux-savegame\n"
 780       << "  (version 1)\n"
 781       << "  (title  \"Icyisland - " << nb_solved_levels << "/" << levels.size() << "\")\n"
 782       << "  (lives   " << player_status.lives << ")\n"
 783       << "  (score   " << player_status.score << ")\n"
 784       << "  (distros " << player_status.distros << ")\n"
 785       << "  (tux     (x " << tux->get_tile_pos().x << ") (y " << tux->get_tile_pos().y << ")"
 786       << " (back \"" << direction_to_string(tux->back_direction) << "\"))\n"
 787       << "  (levels\n";
 788
 789   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 790     {
 791       if (i->solved)
 792         {
 793           out << "     (level (name \"" << i->name << "\")\n"
 794               << "            (solved #t))\n";
 795         }
 796     }
 797
 798   out << "   )\n"
 799       << " )\n\n;; EOF ;;" << std::endl;
 800 }
 801
 802 void
 803 WorldMap::loadgame(const std::string& filename)
 804 {
 805   std::cout << "loadgame: " << filename << std::endl;
 806   savegame_file = filename;
 807
 808   if (access(filename.c_str(), F_OK) == 0)
 809     {
 810       lisp_object_t* cur = lisp_read_from_file(filename);
 811
 812       if (strcmp(lisp_symbol(lisp_car(cur)), "supertux-savegame") != 0)
 813         return;
 814
 815       cur = lisp_cdr(cur);
 816       LispReader reader(cur);
 817
 818       reader.read_int("lives",  &player_status.lives);
 819       reader.read_int("score",  &player_status.score);
 820       reader.read_int("distros", &player_status.distros);
 821
 822       if (player_status.lives < 0)
 823         player_status.lives = START_LIVES;
 824
 825       lisp_object_t* tux_cur = 0;
 826       if (reader.read_lisp("tux", &tux_cur))
 827         {
 828           Point p;
 829           std::string back_str = "none";
 830
 831           LispReader tux_reader(tux_cur);
 832           tux_reader.read_int("x", &p.x);
 833           tux_reader.read_int("y", &p.y);
 834           tux_reader.read_string("back", &back_str);
 835
 836           tux->back_direction = string_to_direction(back_str);
 837           tux->set_tile_pos(p);
 838         }
 839
 840       lisp_object_t* level_cur = 0;
 841       if (reader.read_lisp("levels", &level_cur))
 842         {
 843           while(level_cur)
 844             {
 845               lisp_object_t* sym  = lisp_car(lisp_car(level_cur));
 846               lisp_object_t* data = lisp_cdr(lisp_car(level_cur));
 847
 848               if (strcmp(lisp_symbol(sym), "level") == 0)
 849                 {
 850                   std::string name;
 851                   bool solved = false;
 852
 853                   LispReader level_reader(data);
 854                   level_reader.read_string("name",   &name);
 855                   level_reader.read_bool("solved", &solved);
 856
 857                   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 858                     {
 859                       if (name == i->name)
 860                         i->solved = solved;
 861                     }
 862                 }
 863
 864               level_cur = lisp_cdr(level_cur);
 865             }
 866         }
 867     }
 868 }
 869
 870 } // namespace WorldMapNS
 871
 872 /* Local Variables: */
 873 /* mode:c++ */
 874 /* End: */
 875