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 "setup.h"
  29 #include "worldmap.h"
  30
  31 namespace WorldMapNS {
  32
  33 TileManager* TileManager::instance_  = 0;
  34
  35 TileManager::TileManager()
  36 {
  37   std::string filename = datadir +  "images/worldmap/antarctica.scm";
  38   lisp_object_t* root_obj = lisp_read_from_file(filename);
  39
  40   if (!root_obj)
  41     st_abort("Couldn't load file", 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               texture_load(&tile->sprite,
  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   texture_load(&sprite, datadir +  "/images/worldmap/tux.png", USE_ALPHA);
 106   offset = 0;
 107   moving = false;
 108   tile_pos.x = 0;
 109   tile_pos.y = 0;
 110   direction = NONE;
 111   input_direction = NONE;
 112 }
 113
 114 void
 115 Tux::draw()
 116 {
 117   float x = tile_pos.x * 32;
 118   float y = tile_pos.y * 32;
 119
 120   switch(direction)
 121     {
 122     case WEST:
 123       x -= offset - 32;
 124       break;
 125     case EAST:
 126       x += offset - 32;
 127       break;
 128     case NORTH:
 129       y -= offset - 32;
 130       break;
 131     case SOUTH:
 132       y += offset - 32;
 133       break;
 134     case NONE:
 135       break;
 136     }
 137
 138   texture_draw(&sprite, (int)x, (int)y, NO_UPDATE);
 139 }
 140
 141 void
 142 Tux::stop()
 143 {
 144   offset = 0;
 145   direction = NONE;
 146   moving = false;
 147 }
 148
 149 void
 150 Tux::update(float delta)
 151 {
 152   if (!moving)
 153     {
 154       if (input_direction != NONE)
 155         { // We got a new direction, so lets start walking when possible
 156           Point next_tile;
 157           if (worldmap->path_ok(input_direction, tile_pos, &next_tile))
 158             {
 159               tile_pos = next_tile;
 160               moving = true;
 161               direction = input_direction;
 162             }
 163         }
 164     }
 165   else
 166     {
 167       // Let tux walk a few pixels (20 pixel/sec)
 168       offset += 20.0f * delta;
 169
 170       if (offset > 32)
 171         { // We reached the next tile, so we check what to do now
 172           offset -= 32;
 173
 174           if (worldmap->at(tile_pos)->stop)
 175             {
 176               stop();
 177             }
 178           else
 179             {
 180               Point next_tile;
 181               if (worldmap->path_ok(direction, tile_pos, &next_tile))
 182                 {
 183                   tile_pos = next_tile;
 184                 }
 185               else
 186                 {
 187                   puts("Tilemap data is buggy");
 188                   stop();
 189                 }
 190             }
 191         }
 192     }
 193 }
 194
 195 WorldMap::WorldMap()
 196 {
 197   tux = new Tux(this);
 198
 199   quit = false;
 200   width  = 20;
 201   height = 15;
 202
 203   texture_load(&level_sprite, datadir +  "/images/worldmap/levelmarker.png", USE_ALPHA);
 204
 205   input_direction = NONE;
 206   enter_level = false;
 207
 208   name = "<no name>";
 209   music = "SALCON.MOD";
 210   song = 0;
 211
 212   load_map();
 213 }
 214
 215 WorldMap::~WorldMap()
 216 {
 217   delete tux;
 218 }
 219
 220 void
 221 WorldMap::load_map()
 222 {
 223   std::string filename = datadir +  "levels/default/worldmap.stwm";
 224
 225   lisp_object_t* root_obj = lisp_read_from_file(filename);
 226   if (!root_obj)
 227     st_abort("Couldn't load file", filename);
 228
 229   if (strcmp(lisp_symbol(lisp_car(root_obj)), "supertux-worldmap") == 0)
 230     {
 231       lisp_object_t* cur = lisp_cdr(root_obj);
 232
 233       while(!lisp_nil_p(cur))
 234         {
 235           lisp_object_t* element = lisp_car(cur);
 236
 237           if (strcmp(lisp_symbol(lisp_car(element)), "tilemap") == 0)
 238             {
 239               LispReader reader(lisp_cdr(element));
 240               reader.read_int("width",  &width);
 241               reader.read_int("height", &height);
 242               reader.read_int_vector("data", &tilemap);
 243             }
 244           else if (strcmp(lisp_symbol(lisp_car(element)), "properties") == 0)
 245             {
 246               LispReader reader(lisp_cdr(element));
 247               reader.read_string("name",  &name);
 248               reader.read_string("music", &music);
 249             }
 250           else if (strcmp(lisp_symbol(lisp_car(element)), "levels") == 0)
 251             {
 252               lisp_object_t* cur = lisp_cdr(element);
 253
 254               while(!lisp_nil_p(cur))
 255                 {
 256                   lisp_object_t* element = lisp_car(cur);
 257
 258                   if (strcmp(lisp_symbol(lisp_car(element)), "level") == 0)
 259                     {
 260                       Level level;
 261                       LispReader reader(lisp_cdr(element));
 262                       reader.read_string("name",  &level.name);
 263                       reader.read_int("x-pos", &level.x);
 264                       reader.read_int("y-pos", &level.y);
 265                       levels.push_back(level);
 266                     }
 267
 268                   cur = lisp_cdr(cur);
 269                 }
 270             }
 271           else
 272             {
 273
 274             }
 275
 276           cur = lisp_cdr(cur);
 277         }
 278     }
 279 }
 280
 281 void
 282 WorldMap::get_input()
 283 {
 284   SDL_Event event;
 285
 286   enter_level = false;
 287
 288   while (SDL_PollEvent(&event))
 289     {
 290       switch(event.type)
 291         {
 292         case SDL_QUIT:
 293           quit = true;
 294           break;
 295
 296         case SDL_KEYDOWN:
 297           switch(event.key.keysym.sym)
 298             {
 299             case SDLK_ESCAPE:
 300               quit = true;
 301               break;
 302             case SDLK_LCTRL:
 303             case SDLK_RETURN:
 304               enter_level = true;
 305               break;
 306             default:
 307               break;
 308             }
 309           break;
 310         }
 311     }
 312
 313   Uint8 *keystate = SDL_GetKeyState(NULL);
 314
 315   input_direction = NONE;
 316
 317   if (keystate[SDLK_LEFT])
 318     input_direction = WEST;
 319   else if (keystate[SDLK_RIGHT])
 320     input_direction = EAST;
 321   else if (keystate[SDLK_UP])
 322     input_direction = NORTH;
 323   else if (keystate[SDLK_DOWN])
 324     input_direction = SOUTH;
 325 }
 326
 327 Point
 328 WorldMap::get_next_tile(Point pos, Direction direction)
 329 {
 330   switch(direction)
 331     {
 332     case WEST:
 333       pos.x -= 1;
 334       break;
 335     case EAST:
 336       pos.x += 1;
 337       break;
 338     case NORTH:
 339       pos.y -= 1;
 340       break;
 341     case SOUTH:
 342       pos.y += 1;
 343       break;
 344     case NONE:
 345       break;
 346     }
 347   return pos;
 348 }
 349
 350 bool
 351 WorldMap::path_ok(Direction direction, Point old_pos, Point* new_pos)
 352 {
 353   *new_pos = get_next_tile(old_pos, direction);
 354
 355   if (!(new_pos->x >= 0 && new_pos->x < width
 356         && new_pos->y >= 0 && new_pos->y < height))
 357     { // New position is outsite the tilemap
 358       return false;
 359     }
 360   else
 361     { // Check if we the tile allows us to go to new_pos
 362       switch(direction)
 363         {
 364         case WEST:
 365           return (at(old_pos)->west && at(*new_pos)->east);
 366
 367         case EAST:
 368           return (at(old_pos)->east && at(*new_pos)->west);
 369
 370         case NORTH:
 371           return (at(old_pos)->north && at(*new_pos)->south);
 372
 373         case SOUTH:
 374           return (at(old_pos)->south && at(*new_pos)->north);
 375
 376         case NONE:
 377           assert(!"path_ok() can't work if direction is NONE");
 378         }
 379       return false;
 380     }
 381 }
 382
 383 void
 384 WorldMap::update()
 385 {
 386   if (enter_level && !tux->is_moving())
 387     {
 388       for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 389         {
 390           if (i->x == tux->get_tile_pos().x &&
 391               i->y == tux->get_tile_pos().y)
 392             {
 393               std::cout << "Enter the current level: " << i->name << std::endl;;
 394               halt_music();
 395               gameloop(const_cast<char*>((datadir +  "levels/default/" + i->name).c_str()),
 396                        1, ST_GL_LOAD_LEVEL_FILE);
 397               play_music(song, 1);
 398               break;
 399             }
 400         }
 401     }
 402   else
 403     {
 404       tux->set_direction(input_direction);
 405       tux->update(0.33f);
 406     }
 407 }
 408
 409 Tile*
 410 WorldMap::at(Point p)
 411 {
 412   assert(p.x >= 0
 413          && p.x < width
 414          && p.y >= 0
 415          && p.y < height);
 416   return TileManager::instance()->get(tilemap[width * p.y + p.x]);
 417 }
 418
 419 void
 420 WorldMap::draw()
 421 {
 422   for(int y = 0; y < height; ++y)
 423     for(int x = 0; x < width; ++x)
 424       {
 425         Tile* tile = at(Point(x, y));
 426         texture_draw(&tile->sprite, x*32, y*32, NO_UPDATE);
 427       }
 428
 429   for(Levels::iterator i = levels.begin(); i != levels.end(); ++i)
 430     {
 431       texture_draw(&level_sprite, i->x*32, i->y*32, NO_UPDATE);
 432     }
 433
 434   tux->draw();
 435   flipscreen();
 436 }
 437
 438 void
 439 WorldMap::display()
 440 {
 441   quit = false;
 442
 443   song = load_song(datadir +  "/music/" + music);
 444   play_music(song, 1);
 445
 446   while(!quit) {
 447     draw();
 448     get_input();
 449     update();
 450     SDL_Delay(20);
 451   }
 452
 453   free_music(song);
 454 }
 455
 456 } // namespace WorldMapNS
 457
 458 void worldmap_run()
 459 {
 460   WorldMapNS::WorldMap worldmap;
 461
 462   worldmap.display();
 463 }
 464
 465 /* EOF */