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