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               tile->auto_walk = false;
 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_bool("auto-walk",  &tile->auto_walk);
 123               reader.read_string("image",  &filename);
 124
 125               tile->sprite = new Surface(
 126                            datadir +  "/images/worldmap/" + filename,
 127                            USE_ALPHA);
 128
 129               if (id >= int(tiles.size()))
 130                 tiles.resize(id+1);
 131
 132               tiles[id] = tile;
 133             }
 134           else
 135             {
 136               puts("Unhandled symbol");
 137             }
 138
 139           cur = lisp_cdr(cur);
 140         }
 141     }
 142   else
 143     {
 144       assert(0);
 145     }
 146
 147   lisp_free(root_obj);
 148 }
 149
 150 TileManager::~TileManager()
 151 {
 152   for(std::vector<Tile*>::iterator i = tiles.begin(); i != tiles.end(); ++i)
 153     delete *i;
 154 }
 155
 156 Tile*
 157 TileManager::get(int i)
 158 {
 159   assert(i >=0 && i < int(tiles.size()));
 160   return tiles[i];
 161 }
 162
 163 //---------------------------------------------------------------------------
 164
 165 Tux::Tux(WorldMap* worldmap_)
 166   : worldmap(worldmap_)
 167 {
 168   largetux_sprite = new Surface(datadir +  "/images/worldmap/tux.png", USE_ALPHA);
 169   firetux_sprite = new Surface(datadir +  "/images/worldmap/firetux.png", USE_ALPHA);
 170   smalltux_sprite = new Surface(datadir +  "/images/worldmap/smalltux.png", USE_ALPHA);
 171
 172   offset = 0;
 173   moving = false;
 174   tile_pos.x = 4;
 175   tile_pos.y = 5;
 176   direction = NONE;
 177   input_direction = NONE;
 178 }
 179
 180 Tux::~Tux()
 181 {
 182   delete smalltux_sprite;
 183   delete firetux_sprite;
 184   delete largetux_sprite;
 185 }
 186
 187 void
 188 Tux::draw(const Point& offset)
 189 {
 190   Point pos = get_pos();
 191   switch (player_status.bonus)
 192     {
 193     case PlayerStatus::GROWUP_BONUS:
 194       largetux_sprite->draw(pos.x + offset.x,
 195                             pos.y + offset.y - 10);
 196       break;
 197     case PlayerStatus::FLOWER_BONUS:
 198       firetux_sprite->draw(pos.x + offset.x,
 199                            pos.y + offset.y - 10);
 200       break;
 201     case PlayerStatus::NO_BONUS:
 202       smalltux_sprite->draw(pos.x + offset.x,
 203                             pos.y + offset.y - 10);
 204       break;
 205     }
 206 }
 207
 208
 209 Point
 210 Tux::get_pos()
 211 {
 212   float x = tile_pos.x * 32;
 213   float y = tile_pos.y * 32;
 214
 215   switch(direction)
 216     {
 217     case WEST:
 218       x -= offset - 32;
 219       break;
 220     case EAST:
 221       x += offset - 32;
 222       break;
 223     case NORTH:
 224       y -= offset - 32;
 225       break;
 226     case SOUTH:
 227       y += offset - 32;
 228       break;
 229     case NONE:
 230       break;
 231     }
 232
 233   return Point((int)x, (int)y);
 234 }
 235
 236 void
 237 Tux::stop()
 238 {
 239   offset = 0;
 240   direction = NONE;
 241   moving = false;
 242 }
 243
 244 void
 245 Tux::update(float delta)
 246 {
 247   if (!moving)
 248     {
 249       if (input_direction != NONE)
 250         {
 251           WorldMap::Level* level = worldmap->at_level();
 252
 253           // We got a new direction, so lets start walking when possible
 254           Point next_tile;
 255           if ((!level || level->solved)
 256               && worldmap->path_ok(input_direction, tile_pos, &next_tile))
 257             {
 258               tile_pos = next_tile;
 259               moving = true;
 260               direction = input_direction;
 261               back_direction = reverse_dir(direction);
 262             }
 263           else if (input_direction == back_direction)
 264             {
 265               std::cout << "Back triggered" << std::endl;
 266               moving = true;
 267               direction = input_direction;
 268               tile_pos = worldmap->get_next_tile(tile_pos, direction);
 269               back_direction = reverse_dir(direction);
 270             }
 271         }
 272     }
 273   else
 274     {
 275       // Let tux walk a few pixels (20 pixel/sec)
 276       offset += 20.0f * delta;
 277
 278       if (offset > 32)
 279         { // We reached the next tile, so we check what to do now
 280           offset -= 32;
 281
 282           if (worldmap->at(tile_pos)->stop || worldmap->at_level())
 283             {
 284               stop();
 285             }
 286           else
 287             {
 288               if (worldmap->at(tile_pos)->auto_walk)
 289                 { // Turn to a new direction
 290                   Tile* tile = worldmap->at(tile_pos);
 291                   Direction dir = NONE;
 292
 293                   if (tile->north && back_direction != NORTH)
 294                     dir = NORTH;
 295                   else if (tile->south && back_direction != SOUTH)
 296                     dir = SOUTH;
 297                   else if (tile->east && back_direction != EAST)
 298                     dir = EAST;
 299                   else if (tile->west && back_direction != WEST)
 300                     dir = WEST;
 301
 302                   if (dir != NONE)
 303                     {
 304                       direction = dir;
 305                       back_direction = reverse_dir(direction);
 306                     }
 307                   else
 308                     {
 309                       // Should never be reached if tiledata is good
 310                       stop();
 311                       return;
 312                     }
 313                 }
 314
 315               // Walk automatically to the next tile
 316               Point next_tile;
 317               if (worldmap->path_ok(direction, tile_pos, &next_tile))
 318                 {
 319                   tile_pos = next_tile;
 320                 }
 321               else
 322                 {
 323                   puts("Tilemap data is buggy");
 324                   stop();
 325                 }
 326             }
 327         }
 328     }
 329 }
 330
 331 //---------------------------------------------------------------------------
 332 Tile::Tile()
 333 {
 334 }
 335
 336 Tile::~Tile()
 337 {
 338   delete sprite;
 339 }
 340
 341 //---------------------------------------------------------------------------
 342
 343 WorldMap::WorldMap()
 344 {
 345   tile_manager = new TileManager();
 346   tux = new Tux(this);
 347
 348   width  = 20;
 349   height = 15;
 350
 351   level_sprite = new Surface(datadir +  "/images/worldmap/levelmarker.png", USE_ALPHA);
 352   leveldot_green = new Surface(datadir +  "/images/worldmap/leveldot_green.png", USE_ALPHA);
 353   leveldot_red = new Surface(datadir +  "/images/worldmap/leveldot_red.png", USE_ALPHA);
 354
 355   input_direction = NONE;
 356   enter_level = false;
 357
 358   name = "<no file>";
 359   music = "SALCON.MOD";
 360
 361   load_map();
 362 }
 363
 364 WorldMap::~WorldMap()
 365 {
 366   delete tux;
 367   delete tile_manager;
 368
 369   delete level_sprite;
 370   delete leveldot_green;
 371   delete leveldot_red;
 372 }
 373
 374 void
 375 WorldMap::load_map()
 376 {
 377   std::string filename = datadir +  "/levels/default/worldmap.stwm";
 378
 379   lisp_object_t* root_obj = lisp_read_from_file(filename);
 380   if (!root_obj)
 381     st_abort("Couldn't load file", filename);
 382
 383   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap") == 0)
 384     {
 385       lisp_object_t* cur = lisp_cdr(root_obj);
 386
 387       while(!lisp_nil_p(cur))
 388         {
 389           lisp_object_t* element = lisp_car(cur);
 390
 391           if (strcmp(lisp_symbol(lisp_car(element)), "tilemap") == 0)
 392             {
 393               LispReader reader(lisp_cdr(element));
 394               reader.read_int("width",  &width);
 395               reader.read_int("height", &height);
 396               reader.read_int_vector("data", &tilemap);
 397             }
 398           else if (strcmp(lisp_symbol(lisp_car(element)), "properties") == 0)
 399             {
 400               LispReader reader(lisp_cdr(element));
 401               reader.read_string("name",  &name);
 402               reader.read_string("music", &music);
 403             }
 404           else if (strcmp(lisp_symbol(lisp_car(element)), "levels") == 0)
 405             {
 406               lisp_object_t* cur = lisp_cdr(element);
 407
 408               while(!lisp_nil_p(cur))
 409                 {
 410                   lisp_object_t* element = lisp_car(cur);
 411
 412                   if (strcmp(lisp_symbol(lisp_car(element)), "level") == 0)
 413                     {
 414                       Level level;
 415                       LispReader reader(lisp_cdr(element));
 416                       level.solved = false;
 417
 418                       level.north = true;
 419                       level.east  = true;
 420                       level.south = true;
 421                       level.west  = true;
 422
 423                       reader.read_string("name",  &level.name);
 424                       reader.read_int("x", &level.x);
 425                       reader.read_int("y", &level.y);
 426
 427                       get_level_title(&level);   // get level's title
 428
 429                       levels.push_back(level);
 430                     }
 431
 432                   cur = lisp_cdr(cur);
 433                 }
 434             }
 435           else
 436             {
 437
 438             }
 439
 440           cur = lisp_cdr(cur);
 441         }
 442     }
 443
 444     lisp_free(root_obj);
 445 }
 446
 447 void WorldMap::get_level_title(Levels::pointer level)
 448 {
 449   /** get level's title */
 450   level->title = "<no title>";
 451
 452   FILE * fi;
 453   lisp_object_t* root_obj = 0;
 454   fi = fopen((datadir +  "/levels/" + level->name).c_str(), "r");
 455   if (fi == NULL)
 456   {
 457     perror((datadir +  "/levels/" + level->name).c_str());
 458     return;
 459   }
 460
 461   lisp_stream_t stream;
 462   lisp_stream_init_file (&stream, fi);
 463   root_obj = lisp_read (&stream);
 464
 465   if (root_obj->type == LISP_TYPE_EOF || root_obj->type == LISP_TYPE_PARSE_ERROR)
 466   {
 467     printf("World: Parse Error in file %s", level->name.c_str());
 468   }
 469
 470   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-level") == 0)
 471   {
 472     LispReader reader(lisp_cdr(root_obj));
 473     reader.read_string("name",  &level->title);
 474   }
 475
 476   lisp_free(root_obj);
 477
 478   fclose(fi);
 479 }
 480
 481 void
 482 WorldMap::on_escape_press()
 483 {
 484   // Show or hide the menu
 485   if(!Menu::current())
 486     Menu::set_current(worldmap_menu);
 487   else
 488     Menu::set_current(0);
 489 }
 490
 491 void
 492 WorldMap::get_input()
 493 {
 494   enter_level = false;
 495   input_direction = NONE;
 496
 497   SDL_Event event;
 498   while (SDL_PollEvent(&event))
 499     {
 500       if (Menu::current())
 501         {
 502           Menu::current()->event(event);
 503         }
 504       else
 505         {
 506           switch(event.type)
 507             {
 508             case SDL_QUIT:
 509               st_abort("Received window close", "");
 510               break;
 511
 512             case SDL_KEYDOWN:
 513               switch(event.key.keysym.sym)
 514                 {
 515                 case SDLK_ESCAPE:
 516                   on_escape_press();
 517                   break;
 518                 case SDLK_LCTRL:
 519                 case SDLK_RETURN:
 520                   enter_level = true;
 521                   break;
 522                 default:
 523                   break;
 524                 }
 525               break;
 526
 527             case SDL_JOYAXISMOTION:
 528               if (event.jaxis.axis == joystick_keymap.x_axis)
 529                 {
 530                   if (event.jaxis.value < -joystick_keymap.dead_zone)
 531                     input_direction = WEST;
 532                   else if (event.jaxis.value > joystick_keymap.dead_zone)
 533                     input_direction = EAST;
 534                 }
 535               else if (event.jaxis.axis == joystick_keymap.y_axis)
 536                 {
 537                   if (event.jaxis.value > joystick_keymap.dead_zone)
 538                     input_direction = SOUTH;
 539                   else if (event.jaxis.value < -joystick_keymap.dead_zone)
 540                     input_direction = NORTH;
 541                 }
 542               break;
 543
 544             case SDL_JOYBUTTONDOWN:
 545               if (event.jbutton.button == joystick_keymap.b_button)
 546                 enter_level = true;
 547               else if (event.jbutton.button == joystick_keymap.start_button)
 548                 on_escape_press();
 549               break;
 550
 551             default:
 552               break;
 553             }
 554         }
 555     }
 556
 557   if (!Menu::current())
 558     {
 559       Uint8 *keystate = SDL_GetKeyState(NULL);
 560
 561       if (keystate[SDLK_LEFT])
 562         input_direction = WEST;
 563       else if (keystate[SDLK_RIGHT])
 564         input_direction = EAST;
 565       else if (keystate[SDLK_UP])
 566         input_direction = NORTH;
 567       else if (keystate[SDLK_DOWN])
 568         input_direction = SOUTH;
 569     }
 570 }
 571
 572 Point
 573 WorldMap::get_next_tile(Point pos, Direction direction)
 574 {
 575   switch(direction)
 576     {
 577     case WEST:
 578       pos.x -= 1;
 579       break;
 580     case EAST:
 581       pos.x += 1;
 582       break;
 583     case NORTH:
 584       pos.y -= 1;
 585       break;
 586     case SOUTH:
 587       pos.y += 1;
 588       break;
 589     case NONE:
 590       break;
 591     }
 592   return pos;
 593 }
 594
 595 bool
 596 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 597 {
 598   *new_pos = get_next_tile(old_pos, direction);
 599
 600   if (!(new_pos->x >= 0 && new_pos->x < width
 601         && new_pos->y >= 0 && new_pos->y < height))
 602     { // New position is outsite the tilemap
 603       return false;
 604     }
 605   else
 606     { // Check if we the tile allows us to go to new_pos
 607       switch(direction)
 608         {
 609         case WEST:
 610           return (at(old_pos)->west && at(*new_pos)->east);
 611
 612         case EAST:
 613           return (at(old_pos)->east && at(*new_pos)->west);
 614
 615         case NORTH:
 616           return (at(old_pos)->north && at(*new_pos)->south);
 617
 618         case SOUTH:
 619           return (at(old_pos)->south && at(*new_pos)->north);
 620
 621         case NONE:
 622           assert(!"path_ok() can't work if direction is NONE");
 623         }
 624       return false;
 625     }
 626 }
 627
 628 void
 629 WorldMap::update()
 630 {
 631   if (enter_level && !tux->is_moving())
 632     {
 633       Level* level = at_level();
 634       if (level)
 635         {
 636           if (level->x == tux->get_tile_pos().x &&
 637               level->y == tux->get_tile_pos().y)
 638             {
 639               std::cout << "Enter the current level: " << level->name << std::endl;;
 640               GameSession session(datadir +  "/levels/" + level->name,
 641                                   1, ST_GL_LOAD_LEVEL_FILE);
 642
 643               switch (session.run())
 644                 {
 645                 case GameSession::LEVEL_FINISHED:
 646                   {
 647                     bool old_level_state = level->solved;
 648                     level->solved = true;
 649
 650                     if (session.get_world()->get_tux()->got_coffee)
 651                       player_status.bonus = PlayerStatus::FLOWER_BONUS;
 652                     else if (session.get_world()->get_tux()->size == BIG)
 653                       player_status.bonus = PlayerStatus::GROWUP_BONUS;
 654                     else
 655                       player_status.bonus = PlayerStatus::NO_BONUS;
 656
 657                     if (old_level_state != level->solved)
 658                       { // Try to detect the next direction to which we should walk
 659                         // FIXME: Mostly a hack
 660                         Direction dir = NONE;
 661
 662                         Tile* tile = at(tux->get_tile_pos());
 663
 664                         if (tile->north && tux->back_direction != NORTH)
 665                           dir = NORTH;
 666                         else if (tile->south && tux->back_direction != SOUTH)
 667                           dir = SOUTH;
 668                         else if (tile->east && tux->back_direction != EAST)
 669                           dir = EAST;
 670                         else if (tile->west && tux->back_direction != WEST)
 671                           dir = WEST;
 672
 673                         if (dir != NONE)
 674                           {
 675                             tux->set_direction(dir);
 676                             tux->update(0.33f);
 677                           }
 678
 679                         std::cout << "Walk to dir: " << dir << std::endl;
 680                       }
 681                   }
 682
 683                   break;
 684                 case GameSession::LEVEL_ABORT:
 685                   // Reseting the player_status might be a worthy
 686                   // consideration, but I don't think we need it
 687                   // 'cause only the bad players will use it to
 688                   // 'cheat' a few items and that isn't necesarry a
 689                   // bad thing (ie. better they continue that way,
 690                   // then stop playing the game all together since it
 691                   // is to hard)
 692                   break;
 693                 case GameSession::GAME_OVER:
 694                   quit = true;
 695                   player_status.bonus = PlayerStatus::NO_BONUS;
 696                   break;
 697                 case GameSession::NONE:
 698                   // Should never be reached
 699                   break;
 700                 }
 701
 702               music_manager->play_music(song);
 703               Menu::set_current(0);
 704               if (!savegame_file.empty())
 705                 savegame(savegame_file);
 706               return;
 707             }
 708         }
 709       else
 710         {
 711           std::cout << "Nothing to enter at: "
 712                     << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 713         }
 714     }
 715   else
 716     {
 717       tux->set_direction(input_direction);
 718       tux->update(0.33f);
 719     }
 720
 721   Menu* menu = Menu::current();
 722   if(menu)
 723     {
 724       menu->action();
 725
 726       if(menu == worldmap_menu)
 727         {
 728           switch (worldmap_menu->check())
 729             {
 730             case MNID_RETURNWORLDMAP: // Return to game
 731               break;
 732             case MNID_SAVEGAME:
 733               if (!savegame_file.empty())
 734                 savegame(savegame_file);
 735               break;
 736
 737             case MNID_QUITWORLDMAP: // Quit Worldmap
 738               quit = true;
 739               break;
 740             }
 741         }
 742       else if(menu == options_menu)
 743         {
 744           process_options_menu();
 745         }
 746     }
 747 }
 748
 749 Tile*
 750 WorldMap::at(Point p)
 751 {
 752   assert(p.x >= 0
 753          && p.x < width
 754          && p.y >= 0
 755          && p.y < height);
 756
 757   return tile_manager->get(tilemap[width * p.y + p.x]);
 758 }
 759
 760 WorldMap::Level*
 761 WorldMap::at_level()
 762 {
 763   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 764     {
 765       if (i->x == tux->get_tile_pos().x &&
 766           i->y == tux->get_tile_pos().y)
 767         return &*i;
 768     }
 769
 770   return 0;
 771 }
 772
 773
 774 void
 775 WorldMap::draw(const Point& offset)
 776 {
 777   for(int y = 0; y < height; ++y)
 778     for(int x = 0; x < width; ++x)
 779       {
 780         Tile* tile = at(Point(x, y));
 781         tile->sprite->draw(x*32 + offset.x,
 782                            y*32 + offset.y);
 783       }
 784
 785   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 786     {
 787       if (i->solved)
 788         leveldot_green->draw(i->x*32 + offset.x,
 789                              i->y*32 + offset.y);
 790       else
 791         leveldot_red->draw(i->x*32 + offset.x,
 792                            i->y*32 + offset.y);
 793     }
 794
 795   tux->draw(offset);
 796   draw_status();
 797 }
 798
 799 void
 800 WorldMap::draw_status()
 801 {
 802   char str[80];
 803   sprintf(str, "%d", player_status.score);
 804   white_text->draw("SCORE", 0, 0);
 805   gold_text->draw(str, 96, 0);
 806
 807   sprintf(str, "%d", player_status.distros);
 808   white_text->draw_align("COINS", 320-64, 0,  A_LEFT, A_TOP);
 809   gold_text->draw_align(str, 320+64, 0, A_RIGHT, A_TOP);
 810
 811   white_text->draw("LIVES", 480, 0);
 812   if (player_status.lives >= 5)
 813     {
 814       sprintf(str, "%dx", player_status.lives);
 815       gold_text->draw(str, 585, 0);
 816       tux_life->draw(565+(18*3), 0);
 817     }
 818   else
 819     {
 820       for(int i= 0; i < player_status.lives; ++i)
 821         tux_life->draw(565+(18*i),0);
 822     }
 823
 824   if (!tux->is_moving())
 825     {
 826       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 827         {
 828           if (i->x == tux->get_tile_pos().x &&
 829               i->y == tux->get_tile_pos().y)
 830             {
 831               white_text->draw_align(i->title.c_str(), screen->w/2, screen->h,  A_HMIDDLE, A_BOTTOM);
 832               break;
 833             }
 834         }
 835     }
 836 }
 837
 838 void
 839 WorldMap::display()
 840 {
 841   Menu::set_current(0);
 842
 843   quit = false;
 844
 845   song = music_manager->load_music(datadir +  "/music/" + music);
 846   music_manager->play_music(song);
 847
 848   while(!quit) {
 849     Point tux_pos = tux->get_pos();
 850     if (1)
 851       {
 852         offset.x = -tux_pos.x + screen->w/2;
 853         offset.y = -tux_pos.y + screen->h/2;
 854
 855         if (offset.x > 0) offset.x = 0;
 856         if (offset.y > 0) offset.y = 0;
 857
 858         if (offset.x < screen->w - width*32) offset.x = screen->w - width*32;
 859         if (offset.y < screen->h - height*32) offset.y = screen->h - height*32;
 860       }
 861
 862     draw(offset);
 863     get_input();
 864     update();
 865
 866   if(Menu::current())
 867     {
 868       Menu::current()->draw();
 869       mouse_cursor->draw();
 870     }
 871     flipscreen();
 872
 873     SDL_Delay(20);
 874   }
 875 }
 876
 877 void
 878 WorldMap::savegame(const std::string& filename)
 879 {
 880   std::cout << "savegame: " << filename << std::endl;
 881   std::ofstream out(filename.c_str());
 882
 883   int nb_solved_levels = 0;
 884   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 885     {
 886       if (i->solved)
 887         ++nb_solved_levels;
 888     }
 889
 890   out << "(supertux-savegame\n"
 891       << "  (version 1)\n"
 892       << "  (title  \"Icyisland - " << nb_solved_levels << "/" << levels.size() << "\")\n"
 893       << "  (lives   " << player_status.lives << ")\n"
 894       << "  (score   " << player_status.score << ")\n"
 895       << "  (distros " << player_status.distros << ")\n"
 896       << "  (tux (x " << tux->get_tile_pos().x << ") (y " << tux->get_tile_pos().y << ")\n"
 897       << "       (back \"" << direction_to_string(tux->back_direction) << "\")\n"
 898       << "       (bonus \"" << bonus_to_string(player_status.bonus) <<  "\"))\n"
 899       << "  (levels\n";
 900
 901   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 902     {
 903       if (i->solved)
 904         {
 905           out << "     (level (name \"" << i->name << "\")\n"
 906               << "            (solved #t))\n";
 907         }
 908     }
 909
 910   out << "   )\n"
 911       << " )\n\n;; EOF ;;" << std::endl;
 912 }
 913
 914 void
 915 WorldMap::loadgame(const std::string& filename)
 916 {
 917   std::cout << "loadgame: " << filename << std::endl;
 918   savegame_file = filename;
 919
 920   if (access(filename.c_str(), F_OK) != 0)
 921     return;
 922
 923   lisp_object_t* savegame = lisp_read_from_file(filename);
 924   if (savegame)
 925     {
 926       std::cout << "WorldMap:loadgame: File not found: " << filename << std::endl;
 927       return;
 928     }
 929
 930   lisp_object_t* cur = savegame;
 931
 932   if (strcmp(lisp_symbol(lisp_car(cur)), "supertux-savegame") != 0)
 933     return;
 934
 935   cur = lisp_cdr(cur);
 936   LispReader reader(cur);
 937
 938   reader.read_int("lives",  &player_status.lives);
 939   reader.read_int("score",  &player_status.score);
 940   reader.read_int("distros", &player_status.distros);
 941
 942   if (player_status.lives < 0)
 943     player_status.lives = START_LIVES;
 944
 945   lisp_object_t* tux_cur = 0;
 946   if (reader.read_lisp("tux", &tux_cur))
 947     {
 948       Point p;
 949       std::string back_str = "none";
 950       std::string bonus_str = "none";
 951
 952       LispReader tux_reader(tux_cur);
 953       tux_reader.read_int("x", &p.x);
 954       tux_reader.read_int("y", &p.y);
 955       tux_reader.read_string("back", &back_str);
 956       tux_reader.read_string("bonus", &bonus_str);
 957
 958       player_status.bonus = string_to_bonus(bonus_str);
 959       tux->back_direction = string_to_direction(back_str);
 960       tux->set_tile_pos(p);
 961     }
 962
 963   lisp_object_t* level_cur = 0;
 964   if (reader.read_lisp("levels", &level_cur))
 965     {
 966       while(level_cur)
 967         {
 968           lisp_object_t* sym  = lisp_car(lisp_car(level_cur));
 969           lisp_object_t* data = lisp_cdr(lisp_car(level_cur));
 970
 971           if (strcmp(lisp_symbol(sym), "level") == 0)
 972             {
 973               std::string name;
 974               bool solved = false;
 975
 976               LispReader level_reader(data);
 977               level_reader.read_string("name",   &name);
 978               level_reader.read_bool("solved", &solved);
 979
 980               for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 981                 {
 982                   if (name == i->name)
 983                     i->solved = solved;
 984                 }
 985             }
 986
 987           level_cur = lisp_cdr(level_cur);
 988         }
 989     }
 990
 991   lisp_free(savegame);
 992 }
 993
 994 } // namespace WorldMapNS
 995
 996 /* Local Variables: */
 997 /* mode:c++ */
 998 /* End: */
 999