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