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 #include "resources.h"
  32
  33 namespace WorldMapNS {
  34
  35 Direction reverse_dir(Direction direction)
  36 {
  37   switch(direction)
  38     {
  39     case WEST:
  40       return EAST;
  41     case EAST:
  42       return WEST;
  43     case NORTH:
  44       return SOUTH;
  45     case SOUTH:
  46       return NORTH;
  47     case NONE:
  48       return NONE;
  49     }
  50   return NONE;
  51 }
  52
  53 std::string
  54 direction_to_string(Direction direction)
  55 {
  56   switch(direction)
  57     {
  58     case WEST:
  59       return "west";
  60     case EAST:
  61       return "east";
  62     case NORTH:
  63       return "north";
  64     case SOUTH:
  65       return "south";
  66     default:
  67       return "none";
  68     }
  69 }
  70
  71 Direction
  72 string_to_direction(const std::string& directory)
  73 {
  74   if (directory == "west")
  75     return WEST;
  76   else if (directory == "east")
  77     return EAST;
  78   else if (directory == "north")
  79     return NORTH;
  80   else if (directory == "south")
  81     return SOUTH;
  82   else
  83     return NONE;
  84 }
  85
  86 TileManager::TileManager()
  87 {
  88   std::string stwt_filename = datadir +  "images/worldmap/antarctica.stwt";
  89   lisp_object_t* root_obj = lisp_read_from_file(stwt_filename);
  90
  91   if (!root_obj)
  92     st_abort("Couldn't load file", stwt_filename);
  93
  94   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap-tiles") == 0)
  95     {
  96       lisp_object_t* cur = lisp_cdr(root_obj);
  97
  98       while(!lisp_nil_p(cur))
  99         {
 100           lisp_object_t* element = lisp_car(cur);
 101
 102           if (strcmp(lisp_symbol(lisp_car(element)), "tile") == 0)
 103             {
 104               int id = 0;
 105               std::string filename = "<invalid>";
 106
 107               Tile* tile = new Tile;
 108               tile->north = true;
 109               tile->east  = true;
 110               tile->south = true;
 111               tile->west  = true;
 112               tile->stop  = true;
 113
 114               LispReader reader(lisp_cdr(element));
 115               reader.read_int("id",  &id);
 116               reader.read_bool("north", &tile->north);
 117               reader.read_bool("south", &tile->south);
 118               reader.read_bool("west",  &tile->west);
 119               reader.read_bool("east",  &tile->east);
 120               reader.read_bool("stop",  &tile->stop);
 121               reader.read_string("image",  &filename);
 122
 123               tile->sprite = new Surface(
 124                            datadir +  "/images/worldmap/" + filename,
 125                            USE_ALPHA);
 126
 127               if (id >= int(tiles.size()))
 128                 tiles.resize(id+1);
 129
 130               tiles[id] = tile;
 131             }
 132           else
 133             {
 134               puts("Unhandled symbol");
 135             }
 136
 137           cur = lisp_cdr(cur);
 138         }
 139     }
 140   else
 141     {
 142       assert(0);
 143     }
 144
 145   lisp_free(root_obj);
 146 }
 147
 148 TileManager::~TileManager()
 149 {
 150   for(std::vector<Tile*>::iterator i = tiles.begin(); i != tiles.end(); ++i)
 151     delete *i;
 152 }
 153
 154 Tile*
 155 TileManager::get(int i)
 156 {
 157   assert(i >=0 && i < int(tiles.size()));
 158   return tiles[i];
 159 }
 160
 161 //---------------------------------------------------------------------------
 162
 163 Tux::Tux(WorldMap* worldmap_)
 164   : worldmap(worldmap_)
 165 {
 166   sprite = new Surface(datadir +  "/images/worldmap/tux.png", USE_ALPHA);
 167   offset = 0;
 168   moving = false;
 169   tile_pos.x = 4;
 170   tile_pos.y = 5;
 171   direction = NONE;
 172   input_direction = NONE;
 173 }
 174
 175 Tux::~Tux()
 176 {
 177   delete sprite;
 178 }
 179
 180 void
 181 Tux::draw(const Point& offset)
 182 {
 183   Point pos = get_pos();
 184   sprite->draw(pos.x + offset.x,
 185                pos.y + offset.y - 10);
 186 }
 187
 188
 189 Point
 190 Tux::get_pos()
 191 {
 192   float x = tile_pos.x * 32;
 193   float y = tile_pos.y * 32;
 194
 195   switch(direction)
 196     {
 197     case WEST:
 198       x -= offset - 32;
 199       break;
 200     case EAST:
 201       x += offset - 32;
 202       break;
 203     case NORTH:
 204       y -= offset - 32;
 205       break;
 206     case SOUTH:
 207       y += offset - 32;
 208       break;
 209     case NONE:
 210       break;
 211     }
 212
 213   return Point((int)x, (int)y);
 214 }
 215
 216 void
 217 Tux::stop()
 218 {
 219   offset = 0;
 220   direction = NONE;
 221   moving = false;
 222 }
 223
 224 void
 225 Tux::update(float delta)
 226 {
 227   if (!moving)
 228     {
 229       if (input_direction != NONE)
 230         {
 231           WorldMap::Level* level = worldmap->at_level();
 232
 233           // We got a new direction, so lets start walking when possible
 234           Point next_tile;
 235           if ((!level || level->solved)
 236               && worldmap->path_ok(input_direction, tile_pos, &next_tile))
 237             {
 238               tile_pos = next_tile;
 239               moving = true;
 240               direction = input_direction;
 241               back_direction = reverse_dir(direction);
 242             }
 243           else if (input_direction == back_direction)
 244             {
 245               std::cout << "Back triggered" << std::endl;
 246               moving = true;
 247               direction = input_direction;
 248               tile_pos = worldmap->get_next_tile(tile_pos, direction);
 249               back_direction = reverse_dir(direction);
 250             }
 251         }
 252     }
 253   else
 254     {
 255       // Let tux walk a few pixels (20 pixel/sec)
 256       offset += 20.0f * delta;
 257
 258       if (offset > 32)
 259         { // We reached the next tile, so we check what to do now
 260           offset -= 32;
 261
 262           if (worldmap->at(tile_pos)->stop || worldmap->at_level())
 263             {
 264               stop();
 265             }
 266           else
 267             {
 268               // Walk automatically to the next tile
 269               Point next_tile;
 270               if (worldmap->path_ok(direction, tile_pos, &next_tile))
 271                 {
 272                   tile_pos = next_tile;
 273                 }
 274               else
 275                 {
 276                   puts("Tilemap data is buggy");
 277                   stop();
 278                 }
 279             }
 280         }
 281     }
 282 }
 283
 284 //---------------------------------------------------------------------------
 285 Tile::Tile()
 286 {
 287 }
 288
 289 Tile::~Tile()
 290 {
 291   delete sprite;
 292 }
 293
 294 //---------------------------------------------------------------------------
 295
 296 WorldMap::WorldMap()
 297 {
 298   tile_manager = new TileManager();
 299   tux = new Tux(this);
 300
 301   width  = 20;
 302   height = 15;
 303
 304   level_sprite = new Surface(datadir +  "/images/worldmap/levelmarker.png", USE_ALPHA);
 305   leveldot_green = new Surface(datadir +  "/images/worldmap/leveldot_green.png", USE_ALPHA);
 306   leveldot_red = new Surface(datadir +  "/images/worldmap/leveldot_red.png", USE_ALPHA);
 307
 308   input_direction = NONE;
 309   enter_level = false;
 310
 311   name = "<no file>";
 312   music = "SALCON.MOD";
 313
 314   load_map();
 315 }
 316
 317 WorldMap::~WorldMap()
 318 {
 319   delete tux;
 320   delete tile_manager;
 321
 322   delete level_sprite;
 323   delete leveldot_green;
 324   delete leveldot_red;
 325 }
 326
 327 void
 328 WorldMap::load_map()
 329 {
 330   std::string filename = datadir +  "levels/default/worldmap.stwm";
 331
 332   lisp_object_t* root_obj = lisp_read_from_file(filename);
 333   if (!root_obj)
 334     st_abort("Couldn't load file", filename);
 335
 336   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap") == 0)
 337     {
 338       lisp_object_t* cur = lisp_cdr(root_obj);
 339
 340       while(!lisp_nil_p(cur))
 341         {
 342           lisp_object_t* element = lisp_car(cur);
 343
 344           if (strcmp(lisp_symbol(lisp_car(element)), "tilemap") == 0)
 345             {
 346               LispReader reader(lisp_cdr(element));
 347               reader.read_int("width",  &width);
 348               reader.read_int("height", &height);
 349               reader.read_int_vector("data", &tilemap);
 350             }
 351           else if (strcmp(lisp_symbol(lisp_car(element)), "properties") == 0)
 352             {
 353               LispReader reader(lisp_cdr(element));
 354               reader.read_string("name",  &name);
 355               reader.read_string("music", &music);
 356             }
 357           else if (strcmp(lisp_symbol(lisp_car(element)), "levels") == 0)
 358             {
 359               lisp_object_t* cur = lisp_cdr(element);
 360
 361               while(!lisp_nil_p(cur))
 362                 {
 363                   lisp_object_t* element = lisp_car(cur);
 364
 365                   if (strcmp(lisp_symbol(lisp_car(element)), "level") == 0)
 366                     {
 367                       Level level;
 368                       LispReader reader(lisp_cdr(element));
 369                       level.solved = false;
 370
 371                       level.north = true;
 372                       level.east  = true;
 373                       level.south = true;
 374                       level.west  = true;
 375
 376                       reader.read_string("name",  &level.name);
 377                       reader.read_int("x", &level.x);
 378                       reader.read_int("y", &level.y);
 379
 380                       get_level_title(&level);   // get level's title
 381
 382                       levels.push_back(level);
 383                     }
 384
 385                   cur = lisp_cdr(cur);
 386                 }
 387             }
 388           else
 389             {
 390
 391             }
 392
 393           cur = lisp_cdr(cur);
 394         }
 395     }
 396
 397     lisp_free(root_obj);
 398 }
 399
 400 void WorldMap::get_level_title(Levels::pointer level)
 401 {
 402   /** get level's title */
 403   level->title = "<no title>";
 404
 405   FILE * fi;
 406   lisp_object_t* root_obj = 0;
 407   fi = fopen((datadir +  "levels/" + level->name).c_str(), "r");
 408   if (fi == NULL)
 409   {
 410     perror((datadir +  "levels/" + level->name).c_str());
 411     return;
 412   }
 413
 414   lisp_stream_t stream;
 415   lisp_stream_init_file (&stream, fi);
 416   root_obj = lisp_read (&stream);
 417
 418   if (root_obj->type == LISP_TYPE_EOF || root_obj->type == LISP_TYPE_PARSE_ERROR)
 419   {
 420     printf("World: Parse Error in file %s", level->name.c_str());
 421   }
 422
 423   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-level") == 0)
 424   {
 425     LispReader reader(lisp_cdr(root_obj));
 426     reader.read_string("name",  &level->title);
 427   }
 428
 429   lisp_free(root_obj);
 430
 431   fclose(fi);
 432 }
 433
 434 void
 435 WorldMap::on_escape_press()
 436 {
 437   // Show or hide the menu
 438   if(!Menu::current())
 439     Menu::set_current(worldmap_menu);
 440   else
 441     Menu::set_current(0);
 442 }
 443
 444 void
 445 WorldMap::get_input()
 446 {
 447   enter_level = false;
 448   input_direction = NONE;
 449
 450   SDL_Event event;
 451   while (SDL_PollEvent(&event))
 452     {
 453       if (Menu::current())
 454         {
 455           Menu::current()->event(event);
 456         }
 457       else
 458         {
 459           switch(event.type)
 460             {
 461             case SDL_QUIT:
 462               st_abort("Received window close", "");
 463               break;
 464
 465             case SDL_KEYDOWN:
 466               switch(event.key.keysym.sym)
 467                 {
 468                 case SDLK_ESCAPE:
 469                   on_escape_press();
 470                   break;
 471                 case SDLK_LCTRL:
 472                 case SDLK_RETURN:
 473                   enter_level = true;
 474                   break;
 475                 default:
 476                   break;
 477                 }
 478               break;
 479
 480             case SDL_JOYAXISMOTION:
 481               if (event.jaxis.axis == joystick_keymap.x_axis)
 482                 {
 483                   if (event.jaxis.value < -joystick_keymap.dead_zone)
 484                     input_direction = WEST;
 485                   else if (event.jaxis.value > joystick_keymap.dead_zone)
 486                     input_direction = EAST;
 487                 }
 488               else if (event.jaxis.axis == joystick_keymap.y_axis)
 489                 {
 490                   if (event.jaxis.value > joystick_keymap.dead_zone)
 491                     input_direction = SOUTH;
 492                   else if (event.jaxis.value < -joystick_keymap.dead_zone)
 493                     input_direction = NORTH;
 494                 }
 495               break;
 496
 497             case SDL_JOYBUTTONDOWN:
 498               if (event.jbutton.button == joystick_keymap.b_button)
 499                 enter_level = true;
 500               else if (event.jbutton.button == joystick_keymap.start_button)
 501                 on_escape_press();
 502               break;
 503
 504             default:
 505               break;
 506             }
 507         }
 508     }
 509
 510   if (!Menu::current())
 511     {
 512       Uint8 *keystate = SDL_GetKeyState(NULL);
 513
 514       if (keystate[SDLK_LEFT])
 515         input_direction = WEST;
 516       else if (keystate[SDLK_RIGHT])
 517         input_direction = EAST;
 518       else if (keystate[SDLK_UP])
 519         input_direction = NORTH;
 520       else if (keystate[SDLK_DOWN])
 521         input_direction = SOUTH;
 522     }
 523 }
 524
 525 Point
 526 WorldMap::get_next_tile(Point pos, Direction direction)
 527 {
 528   switch(direction)
 529     {
 530     case WEST:
 531       pos.x -= 1;
 532       break;
 533     case EAST:
 534       pos.x += 1;
 535       break;
 536     case NORTH:
 537       pos.y -= 1;
 538       break;
 539     case SOUTH:
 540       pos.y += 1;
 541       break;
 542     case NONE:
 543       break;
 544     }
 545   return pos;
 546 }
 547
 548 bool
 549 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 550 {
 551   *new_pos = get_next_tile(old_pos, direction);
 552
 553   if (!(new_pos->x >= 0 && new_pos->x < width
 554         && new_pos->y >= 0 && new_pos->y < height))
 555     { // New position is outsite the tilemap
 556       return false;
 557     }
 558   else
 559     { // Check if we the tile allows us to go to new_pos
 560       switch(direction)
 561         {
 562         case WEST:
 563           return (at(old_pos)->west && at(*new_pos)->east);
 564
 565         case EAST:
 566           return (at(old_pos)->east && at(*new_pos)->west);
 567
 568         case NORTH:
 569           return (at(old_pos)->north && at(*new_pos)->south);
 570
 571         case SOUTH:
 572           return (at(old_pos)->south && at(*new_pos)->north);
 573
 574         case NONE:
 575           assert(!"path_ok() can't work if direction is NONE");
 576         }
 577       return false;
 578     }
 579 }
 580
 581 void
 582 WorldMap::update()
 583 {
 584   if (enter_level && !tux->is_moving())
 585     {
 586       Level* level = at_level();
 587       if (level)
 588         {
 589           if (level->x == tux->get_tile_pos().x &&
 590               level->y == tux->get_tile_pos().y)
 591             {
 592               std::cout << "Enter the current level: " << level->name << std::endl;;
 593               GameSession session(datadir +  "levels/" + level->name,
 594                                   1, ST_GL_LOAD_LEVEL_FILE);
 595
 596               switch (session.run())
 597                 {
 598                 case GameSession::LEVEL_FINISHED:
 599                   {
 600                     bool old_level_state = level->solved;
 601                     level->solved = true;
 602
 603                     if (session.get_world()->get_tux()->got_coffee)
 604                       player_status.bonus = PlayerStatus::FLOWER_BONUS;
 605                     else if (session.get_world()->get_tux()->size == BIG)
 606                       player_status.bonus = PlayerStatus::GROWUP_BONUS;
 607                     else
 608                       player_status.bonus = PlayerStatus::NO_BONUS;
 609
 610                     if (old_level_state != level->solved)
 611                       { // Try to detect the next direction to which we should walk
 612                         // FIXME: Mostly a hack
 613                         Direction dir = NONE;
 614
 615                         Tile* tile = at(tux->get_tile_pos());
 616
 617                         if (tile->north && tux->back_direction != NORTH)
 618                           dir = NORTH;
 619                         else if (tile->south && tux->back_direction != SOUTH)
 620                           dir = SOUTH;
 621                         else if (tile->east && tux->back_direction != EAST)
 622                           dir = EAST;
 623                         else if (tile->west && tux->back_direction != WEST)
 624                           dir = WEST;
 625
 626                         if (dir != NONE)
 627                           {
 628                             tux->set_direction(dir);
 629                             tux->update(0.33f);
 630                           }
 631
 632                         std::cout << "Walk to dir: " << dir << std::endl;
 633                       }
 634                   }
 635
 636                   break;
 637                 case GameSession::LEVEL_ABORT:
 638                   // Reseting the player_status might be a worthy
 639                   // consideration, but I don't think we need it
 640                   // 'cause only the bad players will use it to
 641                   // 'cheat' a few items and that isn't necesarry a
 642                   // bad thing (ie. better they continue that way,
 643                   // then stop playing the game all together since it
 644                   // is to hard)
 645                   break;
 646                 case GameSession::GAME_OVER:
 647                   quit = true;
 648                   player_status.bonus = PlayerStatus::NO_BONUS;
 649                   break;
 650                 case GameSession::NONE:
 651                   // Should never be reached
 652                   break;
 653                 }
 654
 655               music_manager->play_music(song);
 656               Menu::set_current(0);
 657               if (!savegame_file.empty())
 658                 savegame(savegame_file);
 659               return;
 660             }
 661         }
 662       else
 663         {
 664           std::cout << "Nothing to enter at: "
 665                     << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 666         }
 667     }
 668   else
 669     {
 670       tux->set_direction(input_direction);
 671       tux->update(0.33f);
 672     }
 673
 674   Menu* menu = Menu::current();
 675   if(menu)
 676     {
 677       menu->action();
 678
 679       if(menu == worldmap_menu)
 680         {
 681           switch (worldmap_menu->check())
 682             {
 683             case MNID_RETURNWORLDMAP: // Return to game
 684               break;
 685             case MNID_SAVEGAME:
 686               if (!savegame_file.empty())
 687                 savegame(savegame_file);
 688               break;
 689
 690             case MNID_QUITWORLDMAP: // Quit Worldmap
 691               quit = true;
 692               break;
 693             }
 694         }
 695       else if(menu == options_menu)
 696         {
 697           process_options_menu();
 698         }
 699     }
 700 }
 701
 702 Tile*
 703 WorldMap::at(Point p)
 704 {
 705   assert(p.x >= 0
 706          && p.x < width
 707          && p.y >= 0
 708          && p.y < height);
 709
 710   return tile_manager->get(tilemap[width * p.y + p.x]);
 711 }
 712
 713 WorldMap::Level*
 714 WorldMap::at_level()
 715 {
 716   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 717     {
 718       if (i->x == tux->get_tile_pos().x &&
 719           i->y == tux->get_tile_pos().y)
 720         return &*i;
 721     }
 722
 723   return 0;
 724 }
 725
 726
 727 void
 728 WorldMap::draw(const Point& offset)
 729 {
 730   for(int y = 0; y < height; ++y)
 731     for(int x = 0; x < width; ++x)
 732       {
 733         Tile* tile = at(Point(x, y));
 734         tile->sprite->draw(x*32 + offset.x,
 735                            y*32 + offset.y);
 736       }
 737
 738   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 739     {
 740       if (i->solved)
 741         leveldot_green->draw(i->x*32 + offset.x,
 742                              i->y*32 + offset.y);
 743       else
 744         leveldot_red->draw(i->x*32 + offset.x,
 745                            i->y*32 + offset.y);
 746     }
 747
 748   tux->draw(offset);
 749   draw_status();
 750 }
 751
 752 void
 753 WorldMap::draw_status()
 754 {
 755   char str[80];
 756   sprintf(str, "%d", player_status.score);
 757   white_text->draw("SCORE", 0, 0);
 758   gold_text->draw(str, 96, 0);
 759
 760   sprintf(str, "%d", player_status.distros);
 761   white_text->draw_align("COINS", 320-64, 0,  A_LEFT, A_TOP);
 762   gold_text->draw_align(str, 320+64, 0, A_RIGHT, A_TOP);
 763
 764   white_text->draw("LIVES", 480, 0);
 765   if (player_status.lives >= 5)
 766     {
 767       sprintf(str, "%dx", player_status.lives);
 768       gold_text->draw(str, 585, 0);
 769       tux_life->draw(565+(18*3), 0);
 770     }
 771   else
 772     {
 773       for(int i= 0; i < player_status.lives; ++i)
 774         tux_life->draw(565+(18*i),0);
 775     }
 776
 777   if (!tux->is_moving())
 778     {
 779       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 780         {
 781           if (i->x == tux->get_tile_pos().x &&
 782               i->y == tux->get_tile_pos().y)
 783             {
 784               white_text->draw_align(i->title.c_str(), screen->w/2, screen->h,  A_HMIDDLE, A_BOTTOM);
 785               break;
 786             }
 787         }
 788     }
 789 }
 790
 791 void
 792 WorldMap::display()
 793 {
 794   Menu::set_current(0);
 795
 796   quit = false;
 797
 798   song = music_manager->load_music(datadir +  "/music/" + music);
 799   music_manager->play_music(song);
 800
 801   while(!quit) {
 802     Point tux_pos = tux->get_pos();
 803     if (1)
 804       {
 805         offset.x = -tux_pos.x + screen->w/2;
 806         offset.y = -tux_pos.y + screen->h/2;
 807
 808         if (offset.x > 0) offset.x = 0;
 809         if (offset.y > 0) offset.y = 0;
 810
 811         if (offset.x < screen->w - width*32) offset.x = screen->w - width*32;
 812         if (offset.y < screen->h - height*32) offset.y = screen->h - height*32;
 813       }
 814
 815     draw(offset);
 816     get_input();
 817     update();
 818
 819   if(Menu::current())
 820     {
 821       Menu::current()->draw();
 822       mouse_cursor->draw();
 823     }
 824     flipscreen();
 825
 826     SDL_Delay(20);
 827   }
 828 }
 829
 830 void
 831 WorldMap::savegame(const std::string& filename)
 832 {
 833   std::cout << "savegame: " << filename << std::endl;
 834   std::ofstream out(filename.c_str());
 835
 836   int nb_solved_levels = 0;
 837   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 838     {
 839       if (i->solved)
 840         ++nb_solved_levels;
 841     }
 842
 843   out << "(supertux-savegame\n"
 844       << "  (version 1)\n"
 845       << "  (title  \"Icyisland - " << nb_solved_levels << "/" << levels.size() << "\")\n"
 846       << "  (lives   " << player_status.lives << ")\n"
 847       << "  (score   " << player_status.score << ")\n"
 848       << "  (distros " << player_status.distros << ")\n"
 849       << "  (tux (x " << tux->get_tile_pos().x << ") (y " << tux->get_tile_pos().y << ")\n"
 850       << "       (back \"" << direction_to_string(tux->back_direction) << "\")\n"
 851       << "       (bonus \"" << bonus_to_string(player_status.bonus) <<  "\"))\n"
 852       << "  (levels\n";
 853
 854   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 855     {
 856       if (i->solved)
 857         {
 858           out << "     (level (name \"" << i->name << "\")\n"
 859               << "            (solved #t))\n";
 860         }
 861     }
 862
 863   out << "   )\n"
 864       << " )\n\n;; EOF ;;" << std::endl;
 865 }
 866
 867 void
 868 WorldMap::loadgame(const std::string& filename)
 869 {
 870   std::cout << "loadgame: " << filename << std::endl;
 871   savegame_file = filename;
 872
 873   if (access(filename.c_str(), F_OK) != 0)
 874     return;
 875
 876   lisp_object_t* savegame = lisp_read_from_file(filename);
 877   lisp_object_t* cur = savegame;
 878
 879   if (strcmp(lisp_symbol(lisp_car(cur)), "supertux-savegame") != 0)
 880     return;
 881
 882   cur = lisp_cdr(cur);
 883   LispReader reader(cur);
 884
 885   reader.read_int("lives",  &player_status.lives);
 886   reader.read_int("score",  &player_status.score);
 887   reader.read_int("distros", &player_status.distros);
 888
 889   if (player_status.lives < 0)
 890     player_status.lives = START_LIVES;
 891
 892   lisp_object_t* tux_cur = 0;
 893   if (reader.read_lisp("tux", &tux_cur))
 894     {
 895       Point p;
 896       std::string back_str = "none";
 897       std::string bonus_str = "none";
 898
 899       LispReader tux_reader(tux_cur);
 900       tux_reader.read_int("x", &p.x);
 901       tux_reader.read_int("y", &p.y);
 902       tux_reader.read_string("back", &back_str);
 903       tux_reader.read_string("bonus", &bonus_str);
 904
 905       player_status.bonus = string_to_bonus(bonus_str);
 906       tux->back_direction = string_to_direction(back_str);
 907       tux->set_tile_pos(p);
 908     }
 909
 910   lisp_object_t* level_cur = 0;
 911   if (reader.read_lisp("levels", &level_cur))
 912     {
 913       while(level_cur)
 914         {
 915           lisp_object_t* sym  = lisp_car(lisp_car(level_cur));
 916           lisp_object_t* data = lisp_cdr(lisp_car(level_cur));
 917
 918           if (strcmp(lisp_symbol(sym), "level") == 0)
 919             {
 920               std::string name;
 921               bool solved = false;
 922
 923               LispReader level_reader(data);
 924               level_reader.read_string("name",   &name);
 925               level_reader.read_bool("solved", &solved);
 926
 927               for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 928                 {
 929                   if (name == i->name)
 930                     i->solved = solved;
 931                 }
 932             }
 933
 934           level_cur = lisp_cdr(level_cur);
 935         }
 936     }
 937
 938   lisp_free(savegame);
 939 }
 940
 941 } // namespace WorldMapNS
 942
 943 /* Local Variables: */
 944 /* mode:c++ */
 945 /* End: */
 946