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 name>";
 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                       levels.push_back(level);
 349                     }
 350
 351                   cur = lisp_cdr(cur);
 352                 }
 353             }
 354           else
 355             {
 356
 357             }
 358
 359           cur = lisp_cdr(cur);
 360         }
 361     }
 362 }
 363
 364 void
 365 WorldMap::get_input()
 366 {
 367   enter_level = false;
 368   input_direction = NONE;
 369
 370   SDL_Event event;
 371   while (SDL_PollEvent(&event))
 372     {
 373       if(!show_menu && event.key.keysym.sym == SDLK_ESCAPE)
 374         Menu::set_current(worldmap_menu);
 375
 376       current_menu->event(event);
 377       if(!show_menu)
 378         {
 379           switch(event.type)
 380             {
 381             case SDL_QUIT:
 382               st_abort("Received window close", "");
 383               break;
 384
 385             case SDL_KEYDOWN:
 386               switch(event.key.keysym.sym)
 387                 {
 388                 case SDLK_LCTRL:
 389                 case SDLK_RETURN:
 390                   enter_level = true;
 391                   break;
 392                 default:
 393                   break;
 394                 }
 395               break;
 396
 397             case SDL_JOYAXISMOTION:
 398               switch(event.jaxis.axis)
 399                 {
 400                 case JOY_X:
 401                   if (event.jaxis.value < -JOYSTICK_DEAD_ZONE)
 402                     input_direction = WEST;
 403                   else if (event.jaxis.value > JOYSTICK_DEAD_ZONE)
 404                     input_direction = EAST;
 405                   break;
 406                 case JOY_Y:
 407                   if (event.jaxis.value > JOYSTICK_DEAD_ZONE)
 408                     input_direction = SOUTH;
 409                   else if (event.jaxis.value < -JOYSTICK_DEAD_ZONE)
 410                     input_direction = NORTH;
 411                   break;
 412                 }
 413               break;
 414
 415             case SDL_JOYBUTTONDOWN:
 416               if (event.jbutton.button == JOY_B)
 417                 enter_level = true;
 418               break;
 419
 420             default:
 421               break;
 422             }
 423         }
 424     }
 425
 426   if (!show_menu)
 427     {
 428       Uint8 *keystate = SDL_GetKeyState(NULL);
 429
 430       if (keystate[SDLK_LEFT])
 431         input_direction = WEST;
 432       else if (keystate[SDLK_RIGHT])
 433         input_direction = EAST;
 434       else if (keystate[SDLK_UP])
 435         input_direction = NORTH;
 436       else if (keystate[SDLK_DOWN])
 437         input_direction = SOUTH;
 438     }
 439 }
 440
 441 Point
 442 WorldMap::get_next_tile(Point pos, Direction direction)
 443 {
 444   switch(direction)
 445     {
 446     case WEST:
 447       pos.x -= 1;
 448       break;
 449     case EAST:
 450       pos.x += 1;
 451       break;
 452     case NORTH:
 453       pos.y -= 1;
 454       break;
 455     case SOUTH:
 456       pos.y += 1;
 457       break;
 458     case NONE:
 459       break;
 460     }
 461   return pos;
 462 }
 463
 464 bool
 465 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 466 {
 467   *new_pos = get_next_tile(old_pos, direction);
 468
 469   if (!(new_pos->x >= 0 && new_pos->x < width
 470         && new_pos->y >= 0 && new_pos->y < height))
 471     { // New position is outsite the tilemap
 472       return false;
 473     }
 474   else
 475     { // Check if we the tile allows us to go to new_pos
 476       switch(direction)
 477         {
 478         case WEST:
 479           return (at(old_pos)->west && at(*new_pos)->east);
 480
 481         case EAST:
 482           return (at(old_pos)->east && at(*new_pos)->west);
 483
 484         case NORTH:
 485           return (at(old_pos)->north && at(*new_pos)->south);
 486
 487         case SOUTH:
 488           return (at(old_pos)->south && at(*new_pos)->north);
 489
 490         case NONE:
 491           assert(!"path_ok() can't work if direction is NONE");
 492         }
 493       return false;
 494     }
 495 }
 496
 497 void
 498 WorldMap::update()
 499 {
 500   if (enter_level && !tux->is_moving())
 501     {
 502       Level* level = at_level();
 503       if (level)
 504         {
 505           if (level->x == tux->get_tile_pos().x &&
 506               level->y == tux->get_tile_pos().y)
 507             {
 508               std::cout << "Enter the current level: " << level->name << std::endl;;
 509               halt_music();
 510
 511               GameSession session(datadir +  "levels/" + level->name,
 512                                   1, ST_GL_LOAD_LEVEL_FILE);
 513
 514               switch (session.run())
 515                 {
 516                 case GameSession::LEVEL_FINISHED:
 517                   level->solved = true;
 518                   break;
 519                 case GameSession::LEVEL_ABORT:
 520                   // Reseting the player_status might be a worthy
 521                   // consideration, but I don't think we need it
 522                   // 'cause only the bad players will use it to
 523                   // 'cheat' a few items and that isn't necesarry a
 524                   // bad thing (ie. better they continue that way,
 525                   // then stop playing the game all together since it
 526                   // is to hard)
 527                   break;
 528                 case GameSession::GAME_OVER:
 529                   quit = true;
 530                   break;
 531                 case GameSession::NONE:
 532                   // Should never be reached
 533                   break;
 534                 }
 535
 536               play_music(song, 1);
 537               show_menu = 0;
 538               menu_reset();
 539               if (!savegame_file.empty())
 540                 savegame(savegame_file);
 541               return;
 542             }
 543         }
 544       else
 545         {
 546           std::cout << "Nothing to enter at: "
 547                     << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 548         }
 549     }
 550   else
 551     {
 552       tux->set_direction(input_direction);
 553       tux->update(0.33f);
 554     }
 555
 556   if(show_menu)
 557     {
 558       if(current_menu == worldmap_menu)
 559         {
 560           switch (worldmap_menu->check())
 561             {
 562             case 2: // Return to game
 563               menu_reset();
 564               break;
 565             case 3:
 566               if (!savegame_file.empty())
 567                 savegame(savegame_file);
 568               break;
 569
 570             case 6: // Quit Worldmap
 571               quit = true;
 572               break;
 573             }
 574         }
 575     }
 576 }
 577
 578 Tile*
 579 WorldMap::at(Point p)
 580 {
 581   assert(p.x >= 0
 582          && p.x < width
 583          && p.y >= 0
 584          && p.y < height);
 585
 586   return TileManager::instance()->get(tilemap[width * p.y + p.x]);
 587 }
 588
 589 WorldMap::Level*
 590 WorldMap::at_level()
 591 {
 592   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 593     {
 594       if (i->x == tux->get_tile_pos().x &&
 595           i->y == tux->get_tile_pos().y)
 596         return &*i;
 597     }
 598
 599   return 0;
 600 }
 601
 602
 603 void
 604 WorldMap::draw(const Point& offset)
 605 {
 606   for(int y = 0; y < height; ++y)
 607     for(int x = 0; x < width; ++x)
 608       {
 609         Tile* tile = at(Point(x, y));
 610         tile->sprite->draw(x*32 + offset.x,
 611                            y*32 + offset.y);
 612       }
 613
 614   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 615     {
 616       if (i->solved)
 617         leveldot_green->draw(i->x*32 + offset.x,
 618                              i->y*32 + offset.y);
 619       else
 620         leveldot_red->draw(i->x*32 + offset.x,
 621                            i->y*32 + offset.y);
 622     }
 623
 624   tux->draw(offset);
 625   draw_status();
 626 }
 627
 628 void
 629 WorldMap::draw_status()
 630 {
 631   char str[80];
 632   sprintf(str, "%d", player_status.score);
 633   white_text->draw("SCORE", 0, 0);
 634   gold_text->draw(str, 96, 0);
 635
 636   sprintf(str, "%d", player_status.distros);
 637   white_text->draw_align("COINS", 320-64, 0,  A_LEFT, A_TOP);
 638   gold_text->draw_align(str, 320+64, 0, A_RIGHT, A_TOP);
 639
 640   white_text->draw("LIVES", 480, 0);
 641   if (player_status.lives >= 5)
 642     {
 643       sprintf(str, "%dx", player_status.lives);
 644       gold_text->draw(str, 585, 0);
 645       tux_life->draw(565+(18*3), 0);
 646     }
 647   else
 648     {
 649       for(int i= 0; i < player_status.lives; ++i)
 650         tux_life->draw(565+(18*i),0);
 651     }
 652
 653   if (!tux->is_moving())
 654     {
 655       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 656         {
 657           if (i->x == tux->get_tile_pos().x &&
 658               i->y == tux->get_tile_pos().y)
 659             {
 660               white_text->draw_align(i->name.c_str(), screen->w/2, screen->h,  A_HMIDDLE, A_BOTTOM);
 661               break;
 662             }
 663         }
 664     }
 665 }
 666
 667 void
 668 WorldMap::display()
 669 {
 670   show_menu = false;
 671
 672   quit = false;
 673
 674   song = load_song(datadir +  "/music/" + music);
 675   play_music(song, 1);
 676
 677   while(!quit) {
 678     Point tux_pos = tux->get_pos();
 679     if (1)
 680       {
 681         offset.x = -tux_pos.x + screen->w/2;
 682         offset.y = -tux_pos.y + screen->h/2;
 683
 684         if (offset.x > 0) offset.x = 0;
 685         if (offset.y > 0) offset.y = 0;
 686
 687         if (offset.x < screen->w - width*32) offset.x = screen->w - width*32;
 688         if (offset.y < screen->h - height*32) offset.y = screen->h - height*32;
 689       }
 690
 691     draw(offset);
 692     get_input();
 693     update();
 694
 695   if(show_menu)
 696     {
 697       menu_process_current();
 698       mouse_cursor->draw();
 699     }
 700     flipscreen();
 701
 702     SDL_Delay(20);
 703   }
 704
 705   halt_music();
 706   free_music(song);
 707 }
 708
 709 void
 710 WorldMap::savegame(const std::string& filename)
 711 {
 712   std::cout << "savegame: " << filename << std::endl;
 713   std::ofstream out(filename.c_str());
 714
 715   int nb_solved_levels = 0;
 716   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 717     {
 718       if (i->solved)
 719         ++nb_solved_levels;
 720     }
 721
 722   out << "(supertux-savegame\n"
 723       << "  (version 1)\n"
 724       << "  (title  \"Icyisland - " << nb_solved_levels << "/" << levels.size() << "\")\n"
 725       << "  (lives   " << player_status.lives << ")\n"
 726       << "  (score   " << player_status.score << ")\n"
 727       << "  (distros " << player_status.distros << ")\n"
 728       << "  (tux     (x " << tux->get_tile_pos().x << ") (y " << tux->get_tile_pos().y << ")"
 729       << " (back \"" << direction_to_string(tux->back_direction) << "\"))\n"
 730       << "  (levels\n";
 731
 732   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 733     {
 734       if (i->solved)
 735         {
 736           out << "     (level (name \"" << i->name << "\")\n"
 737               << "            (solved #t))\n";
 738         }
 739     }
 740
 741   out << "   )\n"
 742       << " )\n\n;; EOF ;;" << std::endl;
 743 }
 744
 745 void
 746 WorldMap::loadgame(const std::string& filename)
 747 {
 748   std::cout << "loadgame: " << filename << std::endl;
 749   savegame_file = filename;
 750
 751   if (access(filename.c_str(), F_OK) == 0)
 752     {
 753       lisp_object_t* cur = lisp_read_from_file(filename);
 754
 755       if (strcmp(lisp_symbol(lisp_car(cur)), "supertux-savegame") != 0)
 756         return;
 757
 758       cur = lisp_cdr(cur);
 759       LispReader reader(cur);
 760
 761       reader.read_int("lives",  &player_status.lives);
 762       reader.read_int("score",  &player_status.score);
 763       reader.read_int("distros", &player_status.distros);
 764
 765       if (player_status.lives < 0)
 766         player_status.lives = 3;
 767
 768       lisp_object_t* tux_cur = 0;
 769       if (reader.read_lisp("tux", &tux_cur))
 770         {
 771           Point p;
 772           std::string back_str = "none";
 773
 774           LispReader tux_reader(tux_cur);
 775           tux_reader.read_int("x", &p.x);
 776           tux_reader.read_int("y", &p.y);
 777           tux_reader.read_string("back", &back_str);
 778
 779           tux->back_direction = string_to_direction(back_str);
 780           tux->set_tile_pos(p);
 781         }
 782
 783       lisp_object_t* level_cur = 0;
 784       if (reader.read_lisp("levels", &level_cur))
 785         {
 786           while(level_cur)
 787             {
 788               lisp_object_t* sym  = lisp_car(lisp_car(level_cur));
 789               lisp_object_t* data = lisp_cdr(lisp_car(level_cur));
 790
 791               if (strcmp(lisp_symbol(sym), "level") == 0)
 792                 {
 793                   std::string name;
 794                   bool solved = false;
 795
 796                   LispReader level_reader(data);
 797                   level_reader.read_string("name",   &name);
 798                   level_reader.read_bool("solved", &solved);
 799
 800                   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 801                     {
 802                       if (name == i->name)
 803                         i->solved = solved;
 804                     }
 805                 }
 806
 807               level_cur = lisp_cdr(level_cur);
 808             }
 809         }
 810     }
 811 }
 812
 813 } // namespace WorldMapNS
 814
 815 /* Local Variables: */
 816 /* mode:c++ */
 817 /* End: */
 818