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::on_escape_press()
 366 {
 367   // Show or hide the menu
 368   if(!Menu::current())
 369     Menu::set_current(worldmap_menu);
 370   else
 371     Menu::set_current(0);
 372 }
 373
 374 void
 375 WorldMap::get_input()
 376 {
 377   enter_level = false;
 378   input_direction = NONE;
 379
 380   SDL_Event event;
 381   while (SDL_PollEvent(&event))
 382     {
 383       if (Menu::current())
 384         {
 385           Menu::current()->event(event);
 386         }
 387       else
 388         {
 389           switch(event.type)
 390             {
 391             case SDL_QUIT:
 392               st_abort("Received window close", "");
 393               break;
 394
 395             case SDL_KEYDOWN:
 396               switch(event.key.keysym.sym)
 397                 {
 398                 case SDLK_ESCAPE:
 399                   on_escape_press();
 400                   break;
 401                 case SDLK_LCTRL:
 402                 case SDLK_RETURN:
 403                   enter_level = true;
 404                   break;
 405                 default:
 406                   break;
 407                 }
 408               break;
 409
 410             case SDL_JOYAXISMOTION:
 411               switch(event.jaxis.axis)
 412                 {
 413                 case JOY_X:
 414                   if (event.jaxis.value < -JOYSTICK_DEAD_ZONE)
 415                     input_direction = WEST;
 416                   else if (event.jaxis.value > JOYSTICK_DEAD_ZONE)
 417                     input_direction = EAST;
 418                   break;
 419                 case JOY_Y:
 420                   if (event.jaxis.value > JOYSTICK_DEAD_ZONE)
 421                     input_direction = SOUTH;
 422                   else if (event.jaxis.value < -JOYSTICK_DEAD_ZONE)
 423                     input_direction = NORTH;
 424                   break;
 425                 }
 426               break;
 427
 428             case SDL_JOYBUTTONDOWN:
 429               if (event.jbutton.button == JOY_B)
 430                 enter_level = true;
 431               else if (event.jbutton.button == JOY_START)
 432                 on_escape_press();
 433               break;
 434
 435             default:
 436               break;
 437             }
 438         }
 439     }
 440
 441   if (!Menu::current())
 442     {
 443       Uint8 *keystate = SDL_GetKeyState(NULL);
 444
 445       if (keystate[SDLK_LEFT])
 446         input_direction = WEST;
 447       else if (keystate[SDLK_RIGHT])
 448         input_direction = EAST;
 449       else if (keystate[SDLK_UP])
 450         input_direction = NORTH;
 451       else if (keystate[SDLK_DOWN])
 452         input_direction = SOUTH;
 453     }
 454 }
 455
 456 Point
 457 WorldMap::get_next_tile(Point pos, Direction direction)
 458 {
 459   switch(direction)
 460     {
 461     case WEST:
 462       pos.x -= 1;
 463       break;
 464     case EAST:
 465       pos.x += 1;
 466       break;
 467     case NORTH:
 468       pos.y -= 1;
 469       break;
 470     case SOUTH:
 471       pos.y += 1;
 472       break;
 473     case NONE:
 474       break;
 475     }
 476   return pos;
 477 }
 478
 479 bool
 480 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 481 {
 482   *new_pos = get_next_tile(old_pos, direction);
 483
 484   if (!(new_pos->x >= 0 && new_pos->x < width
 485         && new_pos->y >= 0 && new_pos->y < height))
 486     { // New position is outsite the tilemap
 487       return false;
 488     }
 489   else
 490     { // Check if we the tile allows us to go to new_pos
 491       switch(direction)
 492         {
 493         case WEST:
 494           return (at(old_pos)->west && at(*new_pos)->east);
 495
 496         case EAST:
 497           return (at(old_pos)->east && at(*new_pos)->west);
 498
 499         case NORTH:
 500           return (at(old_pos)->north && at(*new_pos)->south);
 501
 502         case SOUTH:
 503           return (at(old_pos)->south && at(*new_pos)->north);
 504
 505         case NONE:
 506           assert(!"path_ok() can't work if direction is NONE");
 507         }
 508       return false;
 509     }
 510 }
 511
 512 void
 513 WorldMap::update()
 514 {
 515   if (enter_level && !tux->is_moving())
 516     {
 517       Level* level = at_level();
 518       if (level)
 519         {
 520           if (level->x == tux->get_tile_pos().x &&
 521               level->y == tux->get_tile_pos().y)
 522             {
 523               std::cout << "Enter the current level: " << level->name << std::endl;;
 524               halt_music();
 525
 526               GameSession session(datadir +  "levels/" + level->name,
 527                                   1, ST_GL_LOAD_LEVEL_FILE);
 528
 529               switch (session.run())
 530                 {
 531                 case GameSession::LEVEL_FINISHED:
 532                   level->solved = true;
 533                   break;
 534                 case GameSession::LEVEL_ABORT:
 535                   // Reseting the player_status might be a worthy
 536                   // consideration, but I don't think we need it
 537                   // 'cause only the bad players will use it to
 538                   // 'cheat' a few items and that isn't necesarry a
 539                   // bad thing (ie. better they continue that way,
 540                   // then stop playing the game all together since it
 541                   // is to hard)
 542                   break;
 543                 case GameSession::GAME_OVER:
 544                   quit = true;
 545                   break;
 546                 case GameSession::NONE:
 547                   // Should never be reached
 548                   break;
 549                 }
 550
 551               play_music(song, 1);
 552               Menu::set_current(0);
 553               if (!savegame_file.empty())
 554                 savegame(savegame_file);
 555               return;
 556             }
 557         }
 558       else
 559         {
 560           std::cout << "Nothing to enter at: "
 561                     << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 562         }
 563     }
 564   else
 565     {
 566       tux->set_direction(input_direction);
 567       tux->update(0.33f);
 568     }
 569
 570   Menu* menu = Menu::current();
 571   if(menu)
 572     {
 573       menu->action();
 574
 575       if(menu == worldmap_menu)
 576         {
 577           switch (worldmap_menu->check())
 578             {
 579             case 2: // Return to game
 580               break;
 581             case 3:
 582               if (!savegame_file.empty())
 583                 savegame(savegame_file);
 584               break;
 585
 586             case 6: // Quit Worldmap
 587               quit = true;
 588               break;
 589             }
 590         }
 591       else if(menu == options_menu)
 592         {
 593           process_options_menu();
 594         }
 595     }
 596 }
 597
 598 Tile*
 599 WorldMap::at(Point p)
 600 {
 601   assert(p.x >= 0
 602          && p.x < width
 603          && p.y >= 0
 604          && p.y < height);
 605
 606   return TileManager::instance()->get(tilemap[width * p.y + p.x]);
 607 }
 608
 609 WorldMap::Level*
 610 WorldMap::at_level()
 611 {
 612   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 613     {
 614       if (i->x == tux->get_tile_pos().x &&
 615           i->y == tux->get_tile_pos().y)
 616         return &*i;
 617     }
 618
 619   return 0;
 620 }
 621
 622
 623 void
 624 WorldMap::draw(const Point& offset)
 625 {
 626   for(int y = 0; y < height; ++y)
 627     for(int x = 0; x < width; ++x)
 628       {
 629         Tile* tile = at(Point(x, y));
 630         tile->sprite->draw(x*32 + offset.x,
 631                            y*32 + offset.y);
 632       }
 633
 634   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 635     {
 636       if (i->solved)
 637         leveldot_green->draw(i->x*32 + offset.x,
 638                              i->y*32 + offset.y);
 639       else
 640         leveldot_red->draw(i->x*32 + offset.x,
 641                            i->y*32 + offset.y);
 642     }
 643
 644   tux->draw(offset);
 645   draw_status();
 646 }
 647
 648 void
 649 WorldMap::draw_status()
 650 {
 651   char str[80];
 652   sprintf(str, "%d", player_status.score);
 653   white_text->draw("SCORE", 0, 0);
 654   gold_text->draw(str, 96, 0);
 655
 656   sprintf(str, "%d", player_status.distros);
 657   white_text->draw_align("COINS", 320-64, 0,  A_LEFT, A_TOP);
 658   gold_text->draw_align(str, 320+64, 0, A_RIGHT, A_TOP);
 659
 660   white_text->draw("LIVES", 480, 0);
 661   if (player_status.lives >= 5)
 662     {
 663       sprintf(str, "%dx", player_status.lives);
 664       gold_text->draw(str, 585, 0);
 665       tux_life->draw(565+(18*3), 0);
 666     }
 667   else
 668     {
 669       for(int i= 0; i < player_status.lives; ++i)
 670         tux_life->draw(565+(18*i),0);
 671     }
 672
 673   if (!tux->is_moving())
 674     {
 675       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 676         {
 677           if (i->x == tux->get_tile_pos().x &&
 678               i->y == tux->get_tile_pos().y)
 679             {
 680               white_text->draw_align(i->name.c_str(), screen->w/2, screen->h,  A_HMIDDLE, A_BOTTOM);
 681               break;
 682             }
 683         }
 684     }
 685 }
 686
 687 void
 688 WorldMap::display()
 689 {
 690   Menu::set_current(0);
 691
 692   quit = false;
 693
 694   song = load_song(datadir +  "/music/" + music);
 695   play_music(song, 1);
 696
 697   while(!quit) {
 698     Point tux_pos = tux->get_pos();
 699     if (1)
 700       {
 701         offset.x = -tux_pos.x + screen->w/2;
 702         offset.y = -tux_pos.y + screen->h/2;
 703
 704         if (offset.x > 0) offset.x = 0;
 705         if (offset.y > 0) offset.y = 0;
 706
 707         if (offset.x < screen->w - width*32) offset.x = screen->w - width*32;
 708         if (offset.y < screen->h - height*32) offset.y = screen->h - height*32;
 709       }
 710
 711     draw(offset);
 712     get_input();
 713     update();
 714
 715   if(Menu::current())
 716     {
 717       Menu::current()->draw();
 718       mouse_cursor->draw();
 719     }
 720     flipscreen();
 721
 722     SDL_Delay(20);
 723   }
 724
 725   halt_music();
 726   free_music(song);
 727 }
 728
 729 void
 730 WorldMap::savegame(const std::string& filename)
 731 {
 732   std::cout << "savegame: " << filename << std::endl;
 733   std::ofstream out(filename.c_str());
 734
 735   int nb_solved_levels = 0;
 736   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 737     {
 738       if (i->solved)
 739         ++nb_solved_levels;
 740     }
 741
 742   out << "(supertux-savegame\n"
 743       << "  (version 1)\n"
 744       << "  (title  \"Icyisland - " << nb_solved_levels << "/" << levels.size() << "\")\n"
 745       << "  (lives   " << player_status.lives << ")\n"
 746       << "  (score   " << player_status.score << ")\n"
 747       << "  (distros " << player_status.distros << ")\n"
 748       << "  (tux     (x " << tux->get_tile_pos().x << ") (y " << tux->get_tile_pos().y << ")"
 749       << " (back \"" << direction_to_string(tux->back_direction) << "\"))\n"
 750       << "  (levels\n";
 751
 752   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 753     {
 754       if (i->solved)
 755         {
 756           out << "     (level (name \"" << i->name << "\")\n"
 757               << "            (solved #t))\n";
 758         }
 759     }
 760
 761   out << "   )\n"
 762       << " )\n\n;; EOF ;;" << std::endl;
 763 }
 764
 765 void
 766 WorldMap::loadgame(const std::string& filename)
 767 {
 768   std::cout << "loadgame: " << filename << std::endl;
 769   savegame_file = filename;
 770
 771   if (access(filename.c_str(), F_OK) == 0)
 772     {
 773       lisp_object_t* cur = lisp_read_from_file(filename);
 774
 775       if (strcmp(lisp_symbol(lisp_car(cur)), "supertux-savegame") != 0)
 776         return;
 777
 778       cur = lisp_cdr(cur);
 779       LispReader reader(cur);
 780
 781       reader.read_int("lives",  &player_status.lives);
 782       reader.read_int("score",  &player_status.score);
 783       reader.read_int("distros", &player_status.distros);
 784
 785       if (player_status.lives < 0)
 786         player_status.lives = 3;
 787
 788       lisp_object_t* tux_cur = 0;
 789       if (reader.read_lisp("tux", &tux_cur))
 790         {
 791           Point p;
 792           std::string back_str = "none";
 793
 794           LispReader tux_reader(tux_cur);
 795           tux_reader.read_int("x", &p.x);
 796           tux_reader.read_int("y", &p.y);
 797           tux_reader.read_string("back", &back_str);
 798
 799           tux->back_direction = string_to_direction(back_str);
 800           tux->set_tile_pos(p);
 801         }
 802
 803       lisp_object_t* level_cur = 0;
 804       if (reader.read_lisp("levels", &level_cur))
 805         {
 806           while(level_cur)
 807             {
 808               lisp_object_t* sym  = lisp_car(lisp_car(level_cur));
 809               lisp_object_t* data = lisp_cdr(lisp_car(level_cur));
 810
 811               if (strcmp(lisp_symbol(sym), "level") == 0)
 812                 {
 813                   std::string name;
 814                   bool solved = false;
 815
 816                   LispReader level_reader(data);
 817                   level_reader.read_string("name",   &name);
 818                   level_reader.read_bool("solved", &solved);
 819
 820                   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 821                     {
 822                       if (name == i->name)
 823                         i->solved = solved;
 824                     }
 825                 }
 826
 827               level_cur = lisp_cdr(level_cur);
 828             }
 829         }
 830     }
 831 }
 832
 833 } // namespace WorldMapNS
 834
 835 /* Local Variables: */
 836 /* mode:c++ */
 837 /* End: */
 838