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 <vector>
  22 #include <assert.h>
  23 #include "globals.h"
  24 #include "texture.h"
  25 #include "screen.h"
  26 #include "lispreader.h"
  27 #include "gameloop.h"
  28 #include "setup.h"
  29 #include "worldmap.h"
  30
  31 namespace WorldMapNS {
  32
  33 TileManager* TileManager::instance_  = 0;
  34
  35 TileManager::TileManager()
  36 {
  37   std::string stwt_filename = datadir +  "images/worldmap/antarctica.stwt";
  38   lisp_object_t* root_obj = lisp_read_from_file(stwt_filename);
  39
  40   if (!root_obj)
  41     st_abort("Couldn't load file", stwt_filename);
  42
  43   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap-tiles") == 0)
  44     {
  45       lisp_object_t* cur = lisp_cdr(root_obj);
  46
  47       while(!lisp_nil_p(cur))
  48         {
  49           lisp_object_t* element = lisp_car(cur);
  50
  51           if (strcmp(lisp_symbol(lisp_car(element)), "tile") == 0)
  52             {
  53               int id = 0;
  54               std::string filename = "<invalid>";
  55
  56               Tile* tile = new Tile;
  57               tile->north = true;
  58               tile->east  = true;
  59               tile->south = true;
  60               tile->west  = true;
  61               tile->stop  = true;
  62
  63               LispReader reader(lisp_cdr(element));
  64               reader.read_int("id",  &id);
  65               reader.read_bool("north", &tile->north);
  66               reader.read_bool("south", &tile->south);
  67               reader.read_bool("west",  &tile->west);
  68               reader.read_bool("east",  &tile->east);
  69               reader.read_bool("stop",  &tile->stop);
  70               reader.read_string("image",  &filename);
  71
  72               tile->sprite = new Surface(
  73                            datadir +  "/images/worldmap/" + filename,
  74                            USE_ALPHA);
  75
  76               if (id >= int(tiles.size()))
  77                 tiles.resize(id+1);
  78
  79               tiles[id] = tile;
  80             }
  81           else
  82             {
  83               puts("Unhandled symbol");
  84             }
  85
  86           cur = lisp_cdr(cur);
  87         }
  88     }
  89   else
  90     {
  91       assert(0);
  92     }
  93 }
  94
  95 Tile*
  96 TileManager::get(int i)
  97 {
  98   assert(i >=0 && i < int(tiles.size()));
  99   return tiles[i];
 100 }
 101
 102 Tux::Tux(WorldMap* worldmap_)
 103   : worldmap(worldmap_)
 104 {
 105   sprite = new Surface(datadir +  "/images/worldmap/tux.png", USE_ALPHA);
 106   offset = 0;
 107   moving = false;
 108   tile_pos.x = 5;
 109   tile_pos.y = 5;
 110   direction = NONE;
 111   input_direction = NONE;
 112 }
 113
 114 void
 115 Tux::draw(const Point& offset)
 116 {
 117   Point pos = get_pos();
 118   sprite->draw(pos.x + offset.x,
 119                pos.y + offset.y);
 120 }
 121
 122
 123 Point
 124 Tux::get_pos()
 125 {
 126   float x = tile_pos.x * 32;
 127   float y = tile_pos.y * 32;
 128
 129   switch(direction)
 130     {
 131     case WEST:
 132       x -= offset - 32;
 133       break;
 134     case EAST:
 135       x += offset - 32;
 136       break;
 137     case NORTH:
 138       y -= offset - 32;
 139       break;
 140     case SOUTH:
 141       y += offset - 32;
 142       break;
 143     case NONE:
 144       break;
 145     }
 146
 147   return Point((int)x, (int)y);
 148 }
 149
 150 void
 151 Tux::stop()
 152 {
 153   offset = 0;
 154   direction = NONE;
 155   moving = false;
 156 }
 157
 158 void
 159 Tux::update(float delta)
 160 {
 161   if (!moving)
 162     {
 163       if (input_direction != NONE)
 164         { // We got a new direction, so lets start walking when possible
 165           Point next_tile;
 166           if (worldmap->path_ok(input_direction, tile_pos, &next_tile))
 167             {
 168               tile_pos = next_tile;
 169               moving = true;
 170               direction = input_direction;
 171             }
 172         }
 173     }
 174   else
 175     {
 176       // Let tux walk a few pixels (20 pixel/sec)
 177       offset += 20.0f * delta;
 178
 179       if (offset > 32)
 180         { // We reached the next tile, so we check what to do now
 181           offset -= 32;
 182
 183           if (worldmap->at(tile_pos)->stop)
 184             {
 185               stop();
 186             }
 187           else
 188             {
 189               Point next_tile;
 190               if (worldmap->path_ok(direction, tile_pos, &next_tile))
 191                 {
 192                   tile_pos = next_tile;
 193                 }
 194               else
 195                 {
 196                   puts("Tilemap data is buggy");
 197                   stop();
 198                 }
 199             }
 200         }
 201     }
 202 }
 203
 204 WorldMap::WorldMap()
 205 {
 206   tux = new Tux(this);
 207
 208   quit = false;
 209   width  = 20;
 210   height = 15;
 211
 212   level_sprite = new Surface(datadir +  "/images/worldmap/levelmarker.png", USE_ALPHA);
 213   leveldot_green = new Surface(datadir +  "/images/worldmap/leveldot_green.png", USE_ALPHA);
 214   leveldot_red = new Surface(datadir +  "/images/worldmap/leveldot_red.png", USE_ALPHA);
 215
 216   input_direction = NONE;
 217   enter_level = false;
 218
 219   name = "<no name>";
 220   music = "SALCON.MOD";
 221   song = 0;
 222
 223   load_map();
 224 }
 225
 226 WorldMap::~WorldMap()
 227 {
 228   delete tux;
 229 }
 230
 231 void
 232 WorldMap::load_map()
 233 {
 234   std::string filename = datadir +  "levels/default/worldmap.stwm";
 235
 236   lisp_object_t* root_obj = lisp_read_from_file(filename);
 237   if (!root_obj)
 238     st_abort("Couldn't load file", filename);
 239
 240   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap") == 0)
 241     {
 242       lisp_object_t* cur = lisp_cdr(root_obj);
 243
 244       while(!lisp_nil_p(cur))
 245         {
 246           lisp_object_t* element = lisp_car(cur);
 247
 248           if (strcmp(lisp_symbol(lisp_car(element)), "tilemap") == 0)
 249             {
 250               LispReader reader(lisp_cdr(element));
 251               reader.read_int("width",  &width);
 252               reader.read_int("height", &height);
 253               reader.read_int_vector("data", &tilemap);
 254             }
 255           else if (strcmp(lisp_symbol(lisp_car(element)), "properties") == 0)
 256             {
 257               LispReader reader(lisp_cdr(element));
 258               reader.read_string("name",  &name);
 259               reader.read_string("music", &music);
 260             }
 261           else if (strcmp(lisp_symbol(lisp_car(element)), "levels") == 0)
 262             {
 263               lisp_object_t* cur = lisp_cdr(element);
 264
 265               while(!lisp_nil_p(cur))
 266                 {
 267                   lisp_object_t* element = lisp_car(cur);
 268
 269                   if (strcmp(lisp_symbol(lisp_car(element)), "level") == 0)
 270                     {
 271                       Level level;
 272                       LispReader reader(lisp_cdr(element));
 273                       reader.read_string("name",  &level.name);
 274                       reader.read_int("x", &level.x);
 275                       reader.read_int("y", &level.y);
 276                       levels.push_back(level);
 277                     }
 278
 279                   cur = lisp_cdr(cur);
 280                 }
 281             }
 282           else
 283             {
 284
 285             }
 286
 287           cur = lisp_cdr(cur);
 288         }
 289     }
 290 }
 291
 292 void
 293 WorldMap::get_input()
 294 {
 295   enter_level = false;
 296   input_direction = NONE;
 297
 298   SDL_Event event;
 299   while (SDL_PollEvent(&event))
 300     {
 301       if(show_menu)
 302         {
 303           current_menu->event(event);
 304         }
 305       else
 306         {
 307           switch(event.type)
 308             {
 309             case SDL_QUIT:
 310               quit = true;
 311               break;
 312
 313             case SDL_KEYDOWN:
 314               switch(event.key.keysym.sym)
 315                 {
 316                 case SDLK_ESCAPE:
 317                   Menu::set_current(worldmap_menu);
 318                   show_menu = !show_menu;
 319                   break;
 320                 case SDLK_LCTRL:
 321                 case SDLK_RETURN:
 322                   enter_level = true;
 323                   break;
 324                 default:
 325                   break;
 326                 }
 327               break;
 328
 329             case SDL_JOYAXISMOTION:
 330               switch(event.jaxis.axis)
 331                 {
 332                 case JOY_X:
 333                   if (event.jaxis.value < -JOYSTICK_DEAD_ZONE)
 334                     input_direction = WEST;
 335                   else if (event.jaxis.value > JOYSTICK_DEAD_ZONE)
 336                     input_direction = EAST;
 337                   break;
 338                 case JOY_Y:
 339                   if (event.jaxis.value > JOYSTICK_DEAD_ZONE)
 340                     input_direction = SOUTH;
 341                   else if (event.jaxis.value < -JOYSTICK_DEAD_ZONE)
 342                     input_direction = NORTH;
 343                   break;
 344                 }
 345               break;
 346
 347             case SDL_JOYBUTTONDOWN:
 348               if (event.jbutton.button == JOY_B)
 349                 enter_level = true;
 350               break;
 351
 352             default:
 353               break;
 354             }
 355         }
 356     }
 357
 358   if (!show_menu)
 359     {
 360       Uint8 *keystate = SDL_GetKeyState(NULL);
 361
 362       if (keystate[SDLK_LEFT])
 363         input_direction = WEST;
 364       else if (keystate[SDLK_RIGHT])
 365         input_direction = EAST;
 366       else if (keystate[SDLK_UP])
 367         input_direction = NORTH;
 368       else if (keystate[SDLK_DOWN])
 369         input_direction = SOUTH;
 370     }
 371 }
 372
 373 Point
 374 WorldMap::get_next_tile(Point pos, Direction direction)
 375 {
 376   switch(direction)
 377     {
 378     case WEST:
 379       pos.x -= 1;
 380       break;
 381     case EAST:
 382       pos.x += 1;
 383       break;
 384     case NORTH:
 385       pos.y -= 1;
 386       break;
 387     case SOUTH:
 388       pos.y += 1;
 389       break;
 390     case NONE:
 391       break;
 392     }
 393   return pos;
 394 }
 395
 396 bool
 397 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 398 {
 399   *new_pos = get_next_tile(old_pos, direction);
 400
 401   if (!(new_pos->x >= 0 && new_pos->x < width
 402         && new_pos->y >= 0 && new_pos->y < height))
 403     { // New position is outsite the tilemap
 404       return false;
 405     }
 406   else
 407     { // Check if we the tile allows us to go to new_pos
 408       switch(direction)
 409         {
 410         case WEST:
 411           return (at(old_pos)->west && at(*new_pos)->east);
 412
 413         case EAST:
 414           return (at(old_pos)->east && at(*new_pos)->west);
 415
 416         case NORTH:
 417           return (at(old_pos)->north && at(*new_pos)->south);
 418
 419         case SOUTH:
 420           return (at(old_pos)->south && at(*new_pos)->north);
 421
 422         case NONE:
 423           assert(!"path_ok() can't work if direction is NONE");
 424         }
 425       return false;
 426     }
 427 }
 428
 429 void
 430 WorldMap::update()
 431 {
 432   if (enter_level && !tux->is_moving())
 433     {
 434       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 435         {
 436           if (i->x == tux->get_tile_pos().x &&
 437               i->y == tux->get_tile_pos().y)
 438             {
 439               std::cout << "Enter the current level: " << i->name << std::endl;;
 440               halt_music();
 441               GameSession session(datadir +  "levels/default/" + i->name,
 442                                   1, ST_GL_LOAD_LEVEL_FILE);
 443               session.run();
 444               play_music(song, 1);
 445               return;
 446             }
 447         }
 448       std::cout << "Nothing to enter at: "
 449                 << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 450     }
 451   else
 452     {
 453       tux->set_direction(input_direction);
 454       tux->update(0.33f);
 455     }
 456
 457   if(show_menu)
 458     {
 459       if(current_menu == worldmap_menu)
 460         {
 461           switch (worldmap_menu->check())
 462             {
 463             case 2: // Return to game
 464               menu_reset();
 465               break;
 466             case 5: // Quit Worldmap
 467               quit = true;
 468               break;
 469             }
 470         }
 471     }
 472 }
 473
 474 Tile*
 475 WorldMap::at(Point p)
 476 {
 477   assert(p.x >= 0
 478          && p.x < width
 479          && p.y >= 0
 480          && p.y < height);
 481   return TileManager::instance()->get(tilemap[width * p.y + p.x]);
 482 }
 483
 484 void
 485 WorldMap::draw(const Point& offset)
 486 {
 487   for(int y = 0; y < height; ++y)
 488     for(int x = 0; x < width; ++x)
 489       {
 490         Tile* tile = at(Point(x, y));
 491         tile->sprite->draw(x*32 + offset.x,
 492                            y*32 + offset.y);
 493       }
 494
 495   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 496     {
 497       leveldot_green->draw(i->x*32 + offset.x,
 498                            i->y*32 + offset.y);
 499     }
 500
 501   tux->draw(offset);
 502 }
 503
 504 void
 505 WorldMap::display()
 506 {
 507   quit = false;
 508
 509   song = load_song(datadir +  "/music/" + music);
 510   play_music(song, 1);
 511
 512   while(!quit) {
 513     Point tux_pos = tux->get_pos();
 514     if (1)
 515       {
 516         offset.x = -tux_pos.x + screen->w/2;
 517         offset.y = -tux_pos.y + screen->h/2;
 518
 519         if (offset.x > 0) offset.x = 0;
 520         if (offset.y > 0) offset.y = 0;
 521
 522         if (offset.x < screen->w - width*32) offset.x = screen->w - width*32;
 523         if (offset.y < screen->h - height*32) offset.y = screen->h - height*32;
 524       }
 525
 526     draw(offset);
 527     get_input();
 528     update();
 529
 530     menu_process_current();
 531     flipscreen();
 532
 533     SDL_Delay(20);
 534   }
 535
 536   free_music(song);
 537 }
 538
 539 } // namespace WorldMapNS
 540
 541 void worldmap_run()
 542 {
 543   WorldMapNS::WorldMap worldmap;
 544
 545   worldmap.display();
 546 }
 547
 548 /* EOF */