src/worldmap.cpp

   1 //  $Id$
   2 //
   3 //  Pingus - A free Lemmings clone
   4 //  Copyright (C) 2002 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 "worldmap.h"
  29
  30 namespace WorldMapNS {
  31
  32 TileManager* TileManager::instance_  = 0;
  33
  34 TileManager::TileManager()
  35 {
  36   lisp_object_t* root_obj = lisp_read_from_file(datadir +  "images/worldmap/antarctica.scm");
  37
  38   assert(root_obj);
  39
  40   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap-tiles") == 0)
  41     {
  42       lisp_object_t* cur = lisp_cdr(root_obj);
  43
  44       while(!lisp_nil_p(cur))
  45         {
  46           lisp_object_t* element = lisp_car(cur);
  47
  48           if (strcmp(lisp_symbol(lisp_car(element)), "tile") == 0)
  49             {
  50               int id = 0;
  51               std::string filename = "<invalid>";
  52
  53               Tile* tile = new Tile;
  54               tile->north = true;
  55               tile->east  = true;
  56               tile->south = true;
  57               tile->west  = true;
  58               tile->stop  = true;
  59
  60               LispReader reader(lisp_cdr(element));
  61               reader.read_int("id",  &id);
  62               reader.read_bool("north", &tile->north);
  63               reader.read_bool("south", &tile->south);
  64               reader.read_bool("west",  &tile->west);
  65               reader.read_bool("east",  &tile->east);
  66               reader.read_bool("stop",  &tile->stop);
  67               reader.read_string("image",  &filename);
  68
  69               texture_load(&tile->sprite,
  70                            datadir +  "/images/worldmap/" + filename,
  71                            USE_ALPHA);
  72
  73               if (id >= int(tiles.size()))
  74                 tiles.resize(id+1);
  75
  76               tiles[id] = tile;
  77             }
  78           else
  79             {
  80               puts("Unhandled symbol");
  81             }
  82
  83           cur = lisp_cdr(cur);
  84         }
  85     }
  86   else
  87     {
  88       assert(0);
  89     }
  90 }
  91
  92 Tile*
  93 TileManager::get(int i)
  94 {
  95   assert(i >=0 && i < int(tiles.size()));
  96   return tiles[i];
  97 }
  98
  99 Tux::Tux(WorldMap* worldmap_)
 100   : worldmap(worldmap_)
 101 {
 102   texture_load(&sprite, datadir +  "/images/worldmap/tux.png", USE_ALPHA);
 103   offset = 0;
 104   moving = false;
 105   tile_pos.x = 0;
 106   tile_pos.y = 0;
 107   direction = NONE;
 108   input_direction = NONE;
 109 }
 110
 111 void
 112 Tux::draw()
 113 {
 114   float x = tile_pos.x * 32;
 115   float y = tile_pos.y * 32;
 116
 117   switch(direction)
 118     {
 119     case WEST:
 120       x -= offset - 32;
 121       break;
 122     case EAST:
 123       x += offset - 32;
 124       break;
 125     case NORTH:
 126       y -= offset - 32;
 127       break;
 128     case SOUTH:
 129       y += offset - 32;
 130       break;
 131     case NONE:
 132       break;
 133     }
 134
 135   texture_draw(&sprite, (int)x, (int)y, NO_UPDATE);
 136 }
 137
 138 void
 139 Tux::stop()
 140 {
 141   offset = 0;
 142   direction = NONE;
 143   moving = false;
 144 }
 145
 146 void
 147 Tux::update(float delta)
 148 {
 149   if (!moving)
 150     {
 151       if (input_direction != NONE)
 152         { // We got a new direction, so lets start walking when possible
 153           Point next_tile;
 154           if (worldmap->path_ok(input_direction, tile_pos, &next_tile))
 155             {
 156               tile_pos = next_tile;
 157               moving = true;
 158               direction = input_direction;
 159             }
 160         }
 161     }
 162   else
 163     {
 164       // Let tux walk a few pixels (20 pixel/sec)
 165       offset += 20.0f * delta;
 166
 167       if (offset > 32)
 168         { // We reached the next tile, so we check what to do now
 169           offset -= 32;
 170
 171           if (worldmap->at(tile_pos)->stop)
 172             {
 173               stop();
 174             }
 175           else
 176             {
 177               Point next_tile;
 178               if (worldmap->path_ok(direction, tile_pos, &next_tile))
 179                 {
 180                   tile_pos = next_tile;
 181                 }
 182               else
 183                 {
 184                   puts("Tilemap data is buggy");
 185                   stop();
 186                 }
 187             }
 188         }
 189     }
 190 }
 191
 192 WorldMap::WorldMap()
 193 {
 194   tux = new Tux(this);
 195
 196   quit = false;
 197   width  = 20;
 198   height = 15;
 199
 200   texture_load(&level_sprite, datadir +  "/images/worldmap/levelmarker.png", USE_ALPHA);
 201
 202   input_direction = NONE;
 203   enter_level = false;
 204
 205   name = "<no name>";
 206   music = "SALCON.MOD";
 207   song = 0;
 208
 209   load_map();
 210 }
 211
 212 WorldMap::~WorldMap()
 213 {
 214   delete tux;
 215 }
 216
 217 void
 218 WorldMap::load_map()
 219 {
 220   lisp_object_t* root_obj = lisp_read_from_file(datadir +  "levels/default/worldmap.scm");
 221   assert(root_obj);
 222
 223   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap") == 0)
 224     {
 225       lisp_object_t* cur = lisp_cdr(root_obj);
 226
 227       while(!lisp_nil_p(cur))
 228         {
 229           lisp_object_t* element = lisp_car(cur);
 230
 231           if (strcmp(lisp_symbol(lisp_car(element)), "tilemap") == 0)
 232             {
 233               LispReader reader(lisp_cdr(element));
 234               reader.read_int("width",  &width);
 235               reader.read_int("height", &height);
 236               reader.read_int_vector("data", &tilemap);
 237             }
 238           else if (strcmp(lisp_symbol(lisp_car(element)), "properties") == 0)
 239             {
 240               LispReader reader(lisp_cdr(element));
 241               reader.read_string("name",  &name);
 242               reader.read_string("music", &music);
 243             }
 244           else if (strcmp(lisp_symbol(lisp_car(element)), "levels") == 0)
 245             {
 246               lisp_object_t* cur = lisp_cdr(element);
 247
 248               while(!lisp_nil_p(cur))
 249                 {
 250                   lisp_object_t* element = lisp_car(cur);
 251
 252                   if (strcmp(lisp_symbol(lisp_car(element)), "level") == 0)
 253                     {
 254                       Level level;
 255                       LispReader reader(lisp_cdr(element));
 256                       reader.read_string("name",  &level.name);
 257                       reader.read_int("x-pos", &level.x);
 258                       reader.read_int("y-pos", &level.y);
 259                       levels.push_back(level);
 260                     }
 261
 262                   cur = lisp_cdr(cur);
 263                 }
 264             }
 265           else
 266             {
 267
 268             }
 269
 270           cur = lisp_cdr(cur);
 271         }
 272     }
 273 }
 274
 275 void
 276 WorldMap::get_input()
 277 {
 278   SDL_Event event;
 279
 280   enter_level = false;
 281
 282   while (SDL_PollEvent(&event))
 283     {
 284       switch(event.type)
 285         {
 286         case SDL_QUIT:
 287           quit = true;
 288           break;
 289
 290         case SDL_KEYDOWN:
 291           switch(event.key.keysym.sym)
 292             {
 293             case SDLK_ESCAPE:
 294               quit = true;
 295               break;
 296             case SDLK_LCTRL:
 297             case SDLK_RETURN:
 298               enter_level = true;
 299               break;
 300             default:
 301               break;
 302             }
 303           break;
 304         }
 305     }
 306
 307   Uint8 *keystate = SDL_GetKeyState(NULL);
 308
 309   input_direction = NONE;
 310
 311   if (keystate[SDLK_LEFT])
 312     input_direction = WEST;
 313   else if (keystate[SDLK_RIGHT])
 314     input_direction = EAST;
 315   else if (keystate[SDLK_UP])
 316     input_direction = NORTH;
 317   else if (keystate[SDLK_DOWN])
 318     input_direction = SOUTH;
 319 }
 320
 321 Point
 322 WorldMap::get_next_tile(Point pos, Direction direction)
 323 {
 324   switch(direction)
 325     {
 326     case WEST:
 327       pos.x -= 1;
 328       break;
 329     case EAST:
 330       pos.x += 1;
 331       break;
 332     case NORTH:
 333       pos.y -= 1;
 334       break;
 335     case SOUTH:
 336       pos.y += 1;
 337       break;
 338     case NONE:
 339       break;
 340     }
 341   return pos;
 342 }
 343
 344 bool
 345 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 346 {
 347   *new_pos = get_next_tile(old_pos, direction);
 348
 349   if (!(new_pos->x >= 0 && new_pos->x < width
 350         && new_pos->y >= 0 && new_pos->y < height))
 351     { // New position is outsite the tilemap
 352       return false;
 353     }
 354   else
 355     { // Check if we the tile allows us to go to new_pos
 356       switch(direction)
 357         {
 358         case WEST:
 359           return (at(old_pos)->west && at(*new_pos)->east);
 360
 361         case EAST:
 362           return (at(old_pos)->east && at(*new_pos)->west);
 363
 364         case NORTH:
 365           return (at(old_pos)->north && at(*new_pos)->south);
 366
 367         case SOUTH:
 368           return (at(old_pos)->south && at(*new_pos)->north);
 369
 370         case NONE:
 371           assert(!"path_ok() can't work if direction is NONE");
 372         }
 373       return false;
 374     }
 375 }
 376
 377 void
 378 WorldMap::update()
 379 {
 380   if (enter_level && !tux->is_moving())
 381     {
 382       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 383         {
 384           if (i->x == tux->get_tile_pos().x &&
 385               i->y == tux->get_tile_pos().y)
 386             {
 387               std::cout << "Enter the current level: " << i->name << std::endl;;
 388               halt_music();
 389               gameloop(const_cast<char*>((datadir +  "levels/default/" + i->name).c_str()),
 390                        1, ST_GL_LOAD_LEVEL_FILE);
 391               play_music(song, 1);
 392               break;
 393             }
 394         }
 395     }
 396   else
 397     {
 398       tux->set_direction(input_direction);
 399       tux->update(0.33f);
 400     }
 401 }
 402
 403 Tile*
 404 WorldMap::at(Point p)
 405 {
 406   assert(p.x >= 0
 407          && p.x < width
 408          && p.y >= 0
 409          && p.y < height);
 410   return TileManager::instance()->get(tilemap[width * p.y + p.x]);
 411 }
 412
 413 void
 414 WorldMap::draw()
 415 {
 416   for(int y = 0; y < height; ++y)
 417     for(int x = 0; x < width; ++x)
 418       {
 419         Tile* tile = at(Point(x, y));
 420         texture_draw(&tile->sprite, x*32, y*32, NO_UPDATE);
 421       }
 422
 423   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 424     {
 425       texture_draw(&level_sprite, i->x*32, i->y*32, NO_UPDATE);
 426     }
 427
 428   tux->draw();
 429   flipscreen();
 430 }
 431
 432 void
 433 WorldMap::display()
 434 {
 435   quit = false;
 436
 437   song = load_song(datadir +  "/music/" + music);
 438   play_music(song, 1);
 439
 440   while(!quit) {
 441     draw();
 442     get_input();
 443     update();
 444     SDL_Delay(20);
 445   }
 446
 447   free_music(song);
 448 }
 449
 450 } // namespace WorldMapNS
 451
 452 void worldmap_run()
 453 {
 454   WorldMapNS::WorldMap worldmap;
 455
 456   worldmap.display();
 457 }
 458
 459 /* EOF */