src/worldmap/worldmap.cpp

   1 //  SuperTux -  A Jump'n Run
   2 //  Copyright (C) 2004 Ingo Ruhnke <grumbel@gmx.de>
   3 //  Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.de>
   4 //
   5 //  This program is free software: you can redistribute it and/or modify
   6 //  it under the terms of the GNU General Public License as published by
   7 //  the Free Software Foundation, either version 3 of the License, or
   8 //  (at your option) any later version.
   9 //
  10 //  This program is distributed in the hope that it will be useful,
  11 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 //  GNU General Public License for more details.
  14 //
  15 //  You should have received a copy of the GNU General Public License
  16 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 #include "worldmap/worldmap.hpp"
  19
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <fstream>
  24 #include <iostream>
  25 #include <physfs.h>
  26 #include <sstream>
  27 #include <stdexcept>
  28 #include <unistd.h>
  29 #include <vector>
  30
  31 #include "audio/sound_manager.hpp"
  32 #include "control/joystickkeyboardcontroller.hpp"
  33 #include "gui/menu.hpp"
  34 #include "gui/menu_manager.hpp"
  35 #include "gui/mousecursor.hpp"
  36 #include "lisp/lisp.hpp"
  37 #include "lisp/list_iterator.hpp"
  38 #include "lisp/parser.hpp"
  39 #include "object/background.hpp"
  40 #include "object/decal.hpp"
  41 #include "object/tilemap.hpp"
  42 #include "physfs/ifile_stream.hpp"
  43 #include "scripting/squirrel_error.hpp"
  44 #include "scripting/squirrel_util.hpp"
  45 #include "sprite/sprite.hpp"
  46 #include "sprite/sprite_manager.hpp"
  47 #include "supertux/game_session.hpp"
  48 #include "supertux/globals.hpp"
  49 #include "supertux/screen_manager.hpp"
  50 #include "supertux/menu/menu_storage.hpp"
  51 #include "supertux/menu/options_menu.hpp"
  52 #include "supertux/menu/worldmap_menu.hpp"
  53 #include "supertux/player_status.hpp"
  54 #include "supertux/resources.hpp"
  55 #include "supertux/sector.hpp"
  56 #include "supertux/shrinkfade.hpp"
  57 #include "supertux/spawn_point.hpp"
  58 #include "supertux/textscroller.hpp"
  59 #include "supertux/tile_manager.hpp"
  60 #include "supertux/tile_set.hpp"
  61 #include "supertux/world.hpp"
  62 #include "util/file_system.hpp"
  63 #include "util/gettext.hpp"
  64 #include "util/log.hpp"
  65 #include "util/reader.hpp"
  66 #include "video/drawing_context.hpp"
  67 #include "video/surface.hpp"
  68 #include "worldmap/level.hpp"
  69 #include "worldmap/special_tile.hpp"
  70 #include "worldmap/sprite_change.hpp"
  71 #include "worldmap/tux.hpp"
  72 #include "worldmap/worldmap.hpp"
  73
  74 static const float CAMERA_PAN_SPEED = 5.0;
  75
  76 namespace worldmap {
  77
  78 WorldMap* WorldMap::current_ = NULL;
  79
  80 WorldMap::WorldMap(const std::string& filename, PlayerStatus* player_status, const std::string& force_spawnpoint) :
  81   tux(0),
  82   player_status(player_status),
  83   tileset(NULL),
  84   free_tileset(false),
  85   worldmap_menu(),
  86   camera_offset(),
  87   name(),
  88   music(),
  89   init_script(),
  90   game_objects(),
  91   solid_tilemaps(),
  92   passive_message_timer(),
  93   passive_message(),
  94   map_filename(),
  95   levels_path(),
  96   special_tiles(),
  97   levels(),
  98   sprite_changes(),
  99   spawn_points(),
 100   teleporters(),
 101   total_stats(),
 102   worldmap_table(),
 103   scripts(),
 104   ambient_light( 1.0f, 1.0f, 1.0f, 1.0f ),
 105   force_spawnpoint(force_spawnpoint),
 106   in_level(false),
 107   pan_pos(),
 108   panning(false)
 109 {
 110   tux = new Tux(this);
 111   add_object(tux);
 112
 113   name = "<no title>";
 114   music = "music/salcon.ogg";
 115
 116   total_stats.reset();
 117
 118   worldmap_menu.reset(new WorldmapMenu());
 119
 120   // create a new squirrel table for the worldmap
 121   using namespace scripting;
 122
 123   sq_collectgarbage(global_vm);
 124   sq_newtable(global_vm);
 125   sq_pushroottable(global_vm);
 126   if(SQ_FAILED(sq_setdelegate(global_vm, -2)))
 127     throw scripting::SquirrelError(global_vm, "Couldn't set worldmap_table delegate");
 128
 129   sq_resetobject(&worldmap_table);
 130   if(SQ_FAILED(sq_getstackobj(global_vm, -1, &worldmap_table)))
 131     throw scripting::SquirrelError(global_vm, "Couldn't get table from stack");
 132
 133   sq_addref(global_vm, &worldmap_table);
 134   sq_pop(global_vm, 1);
 135
 136   sound_manager->preload("sounds/warp.wav");
 137
 138   // load worldmap objects
 139   load(filename);
 140 }
 141
 142 WorldMap::~WorldMap()
 143 {
 144   using namespace scripting;
 145
 146   if(free_tileset)
 147     delete tileset;
 148
 149   for(GameObjects::iterator i = game_objects.begin();
 150       i != game_objects.end(); ++i) {
 151     GameObject* object = *i;
 152     try_unexpose(object);
 153     object->unref();
 154   }
 155
 156   for(SpawnPoints::iterator i = spawn_points.begin();
 157       i != spawn_points.end(); ++i) {
 158     delete *i;
 159   }
 160
 161   for(ScriptList::iterator i = scripts.begin();
 162       i != scripts.end(); ++i) {
 163     HSQOBJECT& object = *i;
 164     sq_release(global_vm, &object);
 165   }
 166   sq_release(global_vm, &worldmap_table);
 167
 168   sq_collectgarbage(global_vm);
 169
 170   if(current_ == this)
 171     current_ = NULL;
 172 }
 173
 174 void
 175 WorldMap::add_object(GameObject* object)
 176 {
 177   TileMap* tilemap = dynamic_cast<TileMap*> (object);
 178   if(tilemap != 0 && tilemap->is_solid()) {
 179     solid_tilemaps.push_back(tilemap);
 180   }
 181
 182   object->ref();
 183   try_expose(object);
 184   game_objects.push_back(object);
 185 }
 186
 187 void
 188 WorldMap::try_expose(GameObject* object)
 189 {
 190   ScriptInterface* object_ = dynamic_cast<ScriptInterface*> (object);
 191   if(object_ != NULL) {
 192     HSQUIRRELVM vm = scripting::global_vm;
 193     sq_pushobject(vm, worldmap_table);
 194     object_->expose(vm, -1);
 195     sq_pop(vm, 1);
 196   }
 197 }
 198
 199 void
 200 WorldMap::try_unexpose(GameObject* object)
 201 {
 202   ScriptInterface* object_ = dynamic_cast<ScriptInterface*> (object);
 203   if(object_ != NULL) {
 204     HSQUIRRELVM vm = scripting::global_vm;
 205     SQInteger oldtop = sq_gettop(vm);
 206     sq_pushobject(vm, worldmap_table);
 207     try {
 208       object_->unexpose(vm, -1);
 209     } catch(std::exception& e) {
 210       log_warning << "Couldn't unregister object: " << e.what() << std::endl;
 211     }
 212     sq_settop(vm, oldtop);
 213   }
 214 }
 215
 216 void
 217 WorldMap::move_to_spawnpoint(const std::string& spawnpoint, bool pan)
 218 {
 219   for(SpawnPoints::iterator i = spawn_points.begin(); i != spawn_points.end(); ++i) {
 220     SpawnPoint* sp = *i;
 221     if(sp->name == spawnpoint) {
 222       Vector p = sp->pos;
 223       tux->set_tile_pos(p);
 224       tux->set_direction(sp->auto_dir);
 225       if(pan) {
 226         panning = true;
 227         pan_pos = get_camera_pos_for_tux();
 228         clamp_camera_position(pan_pos);
 229       }
 230       return;
 231     }
 232   }
 233   log_warning << "Spawnpoint '" << spawnpoint << "' not found." << std::endl;
 234   if (spawnpoint != "main") {
 235     move_to_spawnpoint("main");
 236   }
 237 }
 238
 239 void
 240 WorldMap::change(const std::string& filename, const std::string& force_spawnpoint)
 241 {
 242   g_screen_manager->exit_screen();
 243   g_screen_manager->push_screen(new WorldMap(filename, player_status, force_spawnpoint));
 244 }
 245
 246 void
 247 WorldMap::load(const std::string& filename)
 248 {
 249   map_filename = filename;
 250   levels_path = FileSystem::dirname(map_filename);
 251
 252   try {
 253     lisp::Parser parser;
 254     const lisp::Lisp* root = parser.parse(map_filename);
 255
 256     const lisp::Lisp* level = root->get_lisp("supertux-level");
 257     if(level == NULL)
 258       throw std::runtime_error("file isn't a supertux-level file.");
 259
 260     level->get("name", name);
 261
 262     const lisp::Lisp* sector = level->get_lisp("sector");
 263     if(!sector)
 264       throw std::runtime_error("No sector specified in worldmap file.");
 265
 266     const lisp::Lisp* tilesets_lisp = level->get_lisp("tilesets");
 267     if(tilesets_lisp != NULL) {
 268       tileset      = tile_manager->parse_tileset_definition(*tilesets_lisp);
 269       free_tileset = true;
 270     }
 271     std::string tileset_name;
 272     if(level->get("tileset", tileset_name)) {
 273       if(tileset != NULL) {
 274         log_warning << "multiple tilesets specified in level" << std::endl;
 275       } else {
 276         tileset = tile_manager->get_tileset(tileset_name);
 277       }
 278     }
 279     /* load default tileset */
 280     if(tileset == NULL) {
 281       tileset = tile_manager->get_tileset("images/worldmap.strf");
 282     }
 283     current_tileset = tileset;
 284
 285     lisp::ListIterator iter(sector);
 286     while(iter.next()) {
 287       if(iter.item() == "tilemap") {
 288         add_object(new TileMap(*(iter.lisp())));
 289       } else if(iter.item() == "background") {
 290         add_object(new Background(*(iter.lisp())));
 291       } else if(iter.item() == "music") {
 292         iter.value()->get(music);
 293       } else if(iter.item() == "init-script") {
 294         iter.value()->get(init_script);
 295       } else if(iter.item() == "worldmap-spawnpoint") {
 296         SpawnPoint* sp = new SpawnPoint(*iter.lisp());
 297         spawn_points.push_back(sp);
 298       } else if(iter.item() == "level") {
 299         LevelTile* level = new LevelTile(levels_path, *iter.lisp());
 300         levels.push_back(level);
 301         add_object(level);
 302       } else if(iter.item() == "special-tile") {
 303         SpecialTile* special_tile = new SpecialTile(*iter.lisp());
 304         special_tiles.push_back(special_tile);
 305         add_object(special_tile);
 306       } else if(iter.item() == "sprite-change") {
 307         SpriteChange* sprite_change = new SpriteChange(*iter.lisp());
 308         sprite_changes.push_back(sprite_change);
 309         add_object(sprite_change);
 310       } else if(iter.item() == "teleporter") {
 311         Teleporter* teleporter = new Teleporter(*iter.lisp());
 312         teleporters.push_back(teleporter);
 313         add_object(teleporter);
 314       } else if(iter.item() == "decal") {
 315         Decal* decal = new Decal(*iter.lisp());
 316         add_object(decal);
 317       } else if(iter.item() == "ambient-light") {
 318         std::vector<float> vColor;
 319         sector->get( "ambient-light", vColor );
 320         if(vColor.size() < 3) {
 321           log_warning << "(ambient-light) requires a color as argument" << std::endl;
 322         } else {
 323           ambient_light = Color( vColor );
 324         }
 325       } else if(iter.item() == "name") {
 326         // skip
 327       } else {
 328         log_warning << "Unknown token '" << iter.item() << "' in worldmap" << std::endl;
 329       }
 330     }
 331     current_tileset = NULL;
 332
 333     if(solid_tilemaps.size() == 0)
 334       throw std::runtime_error("No solid tilemap specified");
 335
 336     move_to_spawnpoint("main");
 337
 338   } catch(std::exception& e) {
 339     std::stringstream msg;
 340     msg << "Problem when parsing worldmap '" << map_filename << "': " <<
 341       e.what();
 342     throw std::runtime_error(msg.str());
 343   }
 344 }
 345
 346 void
 347 WorldMap::get_level_title(LevelTile& level)
 348 {
 349   /** get special_tile's title */
 350   level.title = "<no title>";
 351
 352   try {
 353     lisp::Parser parser;
 354     const lisp::Lisp* root = parser.parse(levels_path + level.get_name());
 355
 356     const lisp::Lisp* level_lisp = root->get_lisp("supertux-level");
 357     if(!level_lisp)
 358       return;
 359
 360     level_lisp->get("name", level.title);
 361   } catch(std::exception& e) {
 362     log_warning << "Problem when reading leveltitle: " << e.what() << std::endl;
 363     return;
 364   }
 365 }
 366
 367 void
 368 WorldMap::get_level_target_time(LevelTile& level)
 369 {
 370   try {
 371     lisp::Parser parser;
 372     const lisp::Lisp* root = parser.parse(levels_path + level.get_name());
 373
 374     const lisp::Lisp* level_lisp = root->get_lisp("supertux-level");
 375     if(!level_lisp)
 376       return;
 377
 378     level_lisp->get("target-time", level.target_time);
 379   } catch(std::exception& e) {
 380     log_warning << "Problem when reading level target time: " << e.what() << std::endl;
 381     return;
 382   }
 383 }
 384
 385 void WorldMap::calculate_total_stats()
 386 {
 387   total_stats.zero();
 388   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 389     LevelTile* level = *i;
 390     if (level->solved) {
 391       total_stats += level->statistics;
 392     }
 393   }
 394 }
 395
 396 void
 397 WorldMap::on_escape_press()
 398 {
 399   // Show or hide the menu
 400   if(!MenuManager::current()) {
 401     MenuManager::set_current(worldmap_menu.get());
 402     tux->set_direction(D_NONE);  // stop tux movement when menu is called
 403   } else {
 404     MenuManager::set_current(NULL);
 405   }
 406 }
 407
 408 Vector
 409 WorldMap::get_next_tile(Vector pos, Direction direction)
 410 {
 411   switch(direction) {
 412     case D_WEST:
 413       pos.x -= 1;
 414       break;
 415     case D_EAST:
 416       pos.x += 1;
 417       break;
 418     case D_NORTH:
 419       pos.y -= 1;
 420       break;
 421     case D_SOUTH:
 422       pos.y += 1;
 423       break;
 424     case D_NONE:
 425       break;
 426   }
 427   return pos;
 428 }
 429
 430 bool
 431 WorldMap::path_ok(Direction direction, const Vector& old_pos, Vector* new_pos)
 432 {
 433   *new_pos = get_next_tile(old_pos, direction);
 434
 435   if (!(new_pos->x >= 0 && new_pos->x < get_width()
 436         && new_pos->y >= 0 && new_pos->y < get_height()))
 437   { // New position is outsite the tilemap
 438     return false;
 439   }
 440   else
 441   { // Check if the tile allows us to go to new_pos
 442     int old_tile_data = tile_data_at(old_pos);
 443     int new_tile_data = tile_data_at(*new_pos);
 444     switch(direction)
 445     {
 446       case D_WEST:
 447         return (old_tile_data & Tile::WORLDMAP_WEST
 448                 && new_tile_data & Tile::WORLDMAP_EAST);
 449
 450       case D_EAST:
 451         return (old_tile_data & Tile::WORLDMAP_EAST
 452                 && new_tile_data & Tile::WORLDMAP_WEST);
 453
 454       case D_NORTH:
 455         return (old_tile_data & Tile::WORLDMAP_NORTH
 456                 && new_tile_data & Tile::WORLDMAP_SOUTH);
 457
 458       case D_SOUTH:
 459         return (old_tile_data & Tile::WORLDMAP_SOUTH
 460                 && new_tile_data & Tile::WORLDMAP_NORTH);
 461
 462       case D_NONE:
 463         assert(!"path_ok() can't walk if direction is NONE");
 464     }
 465     return false;
 466   }
 467 }
 468
 469 void
 470 WorldMap::finished_level(Level* gamelevel)
 471 {
 472   // TODO use Level* parameter here?
 473   LevelTile* level = at_level();
 474
 475   bool old_level_state = level->solved;
 476   level->solved = true;
 477   level->sprite->set_action("solved");
 478
 479   // deal with statistics
 480   level->statistics.merge(gamelevel->stats);
 481   calculate_total_stats();
 482   get_level_target_time(*level);
 483   if(level->statistics.completed(level->statistics, level->target_time)) {
 484     level->perfect = true;
 485     level->sprite->set_action("perfect");
 486   }
 487
 488   save_state();
 489
 490   if (old_level_state != level->solved) {
 491     // Try to detect the next direction to which we should walk
 492     // FIXME: Mostly a hack
 493     Direction dir = D_NONE;
 494
 495     int dirdata = available_directions_at(tux->get_tile_pos());
 496     // first, test for crossroads
 497     if (dirdata == Tile::WORLDMAP_CNSE ||
 498         dirdata == Tile::WORLDMAP_CNSW ||
 499         dirdata == Tile::WORLDMAP_CNEW ||
 500         dirdata == Tile::WORLDMAP_CSEW ||
 501         dirdata == Tile::WORLDMAP_CNSEW)
 502       dir = D_NONE;
 503     else if (dirdata & Tile::WORLDMAP_NORTH
 504              && tux->back_direction != D_NORTH)
 505       dir = D_NORTH;
 506     else if (dirdata & Tile::WORLDMAP_SOUTH
 507              && tux->back_direction != D_SOUTH)
 508       dir = D_SOUTH;
 509     else if (dirdata & Tile::WORLDMAP_EAST
 510              && tux->back_direction != D_EAST)
 511       dir = D_EAST;
 512     else if (dirdata & Tile::WORLDMAP_WEST
 513              && tux->back_direction != D_WEST)
 514       dir = D_WEST;
 515
 516     if (dir != D_NONE) {
 517       tux->set_direction(dir);
 518     }
 519   }
 520
 521   if (level->extro_script != "") {
 522     try {
 523       std::istringstream in(level->extro_script);
 524       run_script(in, "worldmap:extro_script");
 525     } catch(std::exception& e) {
 526       log_warning << "Couldn't run level-extro-script: " << e.what() << std::endl;
 527     }
 528   }
 529 }
 530
 531 Vector
 532 WorldMap::get_camera_pos_for_tux() {
 533   Vector camera_offset;
 534   Vector tux_pos = tux->get_pos();
 535   camera_offset.x = tux_pos.x - SCREEN_WIDTH/2;
 536   camera_offset.y = tux_pos.y - SCREEN_HEIGHT/2;
 537   return camera_offset;
 538 }
 539
 540 void
 541 WorldMap::clamp_camera_position(Vector& c) {
 542   if (c.x < 0)
 543     c.x = 0;
 544   if (c.y < 0)
 545     c.y = 0;
 546
 547   if (c.x > (int)get_width()*32 - SCREEN_WIDTH)
 548     c.x = (int)get_width()*32 - SCREEN_WIDTH;
 549   if (c.y > (int)get_height()*32 - SCREEN_HEIGHT)
 550     c.y = (int)get_height()*32 - SCREEN_HEIGHT;
 551
 552   if (int(get_width()*32) < SCREEN_WIDTH)
 553     c.x = get_width()*16.0 - SCREEN_WIDTH/2.0;
 554   if (int(get_height()*32) < SCREEN_HEIGHT)
 555     c.y = get_height()*16.0 - SCREEN_HEIGHT/2.0;
 556 }
 557
 558 void
 559 WorldMap::update(float delta)
 560 {
 561   if(!in_level) {
 562     Menu* menu = MenuManager::current();
 563     if(menu != NULL) {
 564       if(menu == worldmap_menu.get()) {
 565         switch (worldmap_menu->check())
 566         {
 567           case MNID_RETURNWORLDMAP: // Return to game
 568             MenuManager::set_current(0);
 569             break;
 570           case MNID_QUITWORLDMAP: // Quit Worldmap
 571             g_screen_manager->exit_screen();
 572             break;
 573         }
 574       }
 575
 576       return;
 577     }
 578
 579     // update GameObjects
 580     for(size_t i = 0; i < game_objects.size(); ++i) {
 581       GameObject* object = game_objects[i];
 582       if(!panning || object != tux) {
 583         object->update(delta);
 584       }
 585     }
 586
 587     // remove old GameObjects
 588     for(GameObjects::iterator i = game_objects.begin();
 589         i != game_objects.end(); ) {
 590       GameObject* object = *i;
 591       if(!object->is_valid()) {
 592         try_unexpose(object);
 593         object->unref();
 594         i = game_objects.erase(i);
 595       } else {
 596         ++i;
 597       }
 598     }
 599
 600     /* update solid_tilemaps list */
 601     //FIXME: this could be more efficient
 602     solid_tilemaps.clear();
 603     for(std::vector<GameObject*>::iterator i = game_objects.begin();
 604         i != game_objects.end(); ++i)
 605     {
 606       TileMap* tm = dynamic_cast<TileMap*>(*i);
 607       if (!tm) continue;
 608       if (tm->is_solid()) solid_tilemaps.push_back(tm);
 609     }
 610
 611     Vector requested_pos;
 612
 613     // position "camera"
 614     if(!panning) {
 615       camera_offset = get_camera_pos_for_tux();
 616     } else {
 617       Vector delta = pan_pos - camera_offset;
 618       float mag = delta.norm();
 619       if(mag > CAMERA_PAN_SPEED) {
 620         delta *= CAMERA_PAN_SPEED/mag;
 621       }
 622       camera_offset += delta;
 623       if(camera_offset == pan_pos) {
 624         panning = false;
 625       }
 626     }
 627
 628     requested_pos = camera_offset;
 629     clamp_camera_position(camera_offset);
 630
 631     if(panning) {
 632       if(requested_pos.x != camera_offset.x) {
 633         pan_pos.x = camera_offset.x;
 634       }
 635       if(requested_pos.y != camera_offset.y) {
 636         pan_pos.y = camera_offset.y;
 637       }
 638     }
 639
 640     // handle input
 641     Controller *controller = g_jk_controller->get_main_controller();
 642     bool enter_level = false;
 643     if(controller->pressed(Controller::ACTION)
 644        || controller->pressed(Controller::JUMP)
 645        || controller->pressed(Controller::MENU_SELECT)) {
 646       /* some people define UP and JUMP on the same key... */
 647       if(!controller->pressed(Controller::UP))
 648         enter_level = true;
 649     }
 650     if(controller->pressed(Controller::PAUSE_MENU))
 651       on_escape_press();
 652
 653     // check for teleporters
 654     Teleporter* teleporter = at_teleporter(tux->get_tile_pos());
 655     if (teleporter && (teleporter->automatic || (enter_level && (!tux->is_moving())))) {
 656       enter_level = false;
 657       if (teleporter->worldmap != "") {
 658         change(teleporter->worldmap, teleporter->spawnpoint);
 659       } else {
 660         // TODO: an animation, camera scrolling or a fading would be a nice touch
 661         sound_manager->play("sounds/warp.wav");
 662         tux->back_direction = D_NONE;
 663         move_to_spawnpoint(teleporter->spawnpoint, true);
 664       }
 665     }
 666
 667     // check for auto-play levels
 668     LevelTile* level = at_level();
 669     if (level && (level->auto_play) && (!level->solved) && (!tux->is_moving())) {
 670       enter_level = true;
 671     }
 672
 673     if (enter_level && !tux->is_moving())
 674     {
 675       /* Check level action */
 676       LevelTile* level = at_level();
 677       if (!level) {
 678         //Respawn if player on a tile with no level and nowhere to go.
 679         int tile_data = tile_data_at(tux->get_tile_pos());
 680         if(!( tile_data & ( Tile::WORLDMAP_NORTH |  Tile::WORLDMAP_SOUTH | Tile::WORLDMAP_WEST | Tile::WORLDMAP_EAST ))){
 681           log_warning << "Player at illegal position " << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << " respawning." << std::endl;
 682           move_to_spawnpoint("main");
 683           return;
 684         }
 685         log_warning << "No level to enter at: " << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 686         return;
 687       }
 688
 689       if (level->pos == tux->get_tile_pos()) {
 690         try {
 691           Vector shrinkpos = Vector(level->pos.x*32 + 16 - camera_offset.x,
 692                                     level->pos.y*32 +  8 - camera_offset.y);
 693           std::string levelfile = levels_path + level->get_name();
 694
 695           // update state and savegame
 696           save_state();
 697
 698           g_screen_manager->push_screen(new GameSession(levelfile, player_status, &level->statistics),
 699                                    new ShrinkFade(shrinkpos, 1.0f));
 700           in_level = true;
 701         } catch(std::exception& e) {
 702           log_fatal << "Couldn't load level: " << e.what() << std::endl;
 703         }
 704       }
 705     }
 706     else
 707     {
 708       //      tux->set_direction(input_direction);
 709     }
 710   }
 711 }
 712
 713 int
 714 WorldMap::tile_data_at(Vector p)
 715 {
 716   int dirs = 0;
 717
 718   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
 719     TileMap* tilemap = *i;
 720     const Tile* tile = tilemap->get_tile((int)p.x, (int)p.y);
 721     int dirdata = tile->getData();
 722     dirs |= dirdata;
 723   }
 724
 725   return dirs;
 726 }
 727
 728 int
 729 WorldMap::available_directions_at(Vector p)
 730 {
 731   return tile_data_at(p) & Tile::WORLDMAP_DIR_MASK;
 732 }
 733
 734 LevelTile*
 735 WorldMap::at_level()
 736 {
 737   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 738     LevelTile* level = *i;
 739     if (level->pos == tux->get_tile_pos())
 740       return level;
 741   }
 742
 743   return NULL;
 744 }
 745
 746 SpecialTile*
 747 WorldMap::at_special_tile()
 748 {
 749   for(SpecialTiles::iterator i = special_tiles.begin();
 750       i != special_tiles.end(); ++i) {
 751     SpecialTile* special_tile = *i;
 752     if (special_tile->pos == tux->get_tile_pos())
 753       return special_tile;
 754   }
 755
 756   return NULL;
 757 }
 758
 759 SpriteChange*
 760 WorldMap::at_sprite_change(const Vector& pos)
 761 {
 762   for(SpriteChanges::iterator i = sprite_changes.begin();
 763       i != sprite_changes.end(); ++i) {
 764     SpriteChange* sprite_change = *i;
 765     if(sprite_change->pos == pos)
 766       return sprite_change;
 767   }
 768
 769   return NULL;
 770 }
 771
 772 Teleporter*
 773 WorldMap::at_teleporter(const Vector& pos)
 774 {
 775   for(std::vector<Teleporter*>::iterator i = teleporters.begin(); i != teleporters.end(); ++i) {
 776     Teleporter* teleporter = *i;
 777     if(teleporter->pos == pos) return teleporter;
 778   }
 779
 780   return NULL;
 781 }
 782
 783 void
 784 WorldMap::draw(DrawingContext& context)
 785 {
 786   if (int(get_width()*32) < SCREEN_WIDTH || int(get_height()*32) < SCREEN_HEIGHT)
 787     context.draw_filled_rect(Vector(0, 0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 788                              Color(0.0f, 0.0f, 0.0f, 1.0f), LAYER_BACKGROUND0);
 789
 790   context.set_ambient_color( ambient_light );
 791   context.push_transform();
 792   context.set_translation(camera_offset);
 793
 794   for(GameObjects::iterator i = game_objects.begin();
 795       i != game_objects.end(); ++i) {
 796     GameObject* object = *i;
 797     if(!panning || object != tux) {
 798       object->draw(context);
 799     }
 800   }
 801
 802   /*
 803   // FIXME: make this a runtime switch similar to draw_collrects/show_collrects?
 804   // draw visual indication of possible walk directions
 805   static int flipme = 0;
 806   if (flipme++ & 0x04)
 807   for (int x = 0; x < get_width(); x++) {
 808   for (int y = 0; y < get_height(); y++) {
 809   int data = tile_data_at(Vector(x,y));
 810   int px = x * 32;
 811   int py = y * 32;
 812   const int W = 4;
 813   if (data & Tile::WORLDMAP_NORTH)    context.draw_filled_rect(Rect(px + 16-W, py       , px + 16+W, py + 16-W), Color(0.2f, 0.2f, 0.2f, 0.7f), LAYER_FOREGROUND1 + 1000);
 814   if (data & Tile::WORLDMAP_SOUTH)    context.draw_filled_rect(Rect(px + 16-W, py + 16+W, px + 16+W, py + 32  ), Color(0.2f, 0.2f, 0.2f, 0.7f), LAYER_FOREGROUND1 + 1000);
 815   if (data & Tile::WORLDMAP_EAST)     context.draw_filled_rect(Rect(px + 16+W, py + 16-W, px + 32  , py + 16+W), Color(0.2f, 0.2f, 0.2f, 0.7f), LAYER_FOREGROUND1 + 1000);
 816   if (data & Tile::WORLDMAP_WEST)     context.draw_filled_rect(Rect(px       , py + 16-W, px + 16-W, py + 16+W), Color(0.2f, 0.2f, 0.2f, 0.7f), LAYER_FOREGROUND1 + 1000);
 817   if (data & Tile::WORLDMAP_DIR_MASK) context.draw_filled_rect(Rect(px + 16-W, py + 16-W, px + 16+W, py + 16+W), Color(0.2f, 0.2f, 0.2f, 0.7f), LAYER_FOREGROUND1 + 1000);
 818   if (data & Tile::WORLDMAP_STOP)     context.draw_filled_rect(Rect(px + 4   , py + 4   , px + 28  , py + 28  ), Color(0.2f, 0.2f, 0.2f, 0.7f), LAYER_FOREGROUND1 + 1000);
 819   }
 820   }
 821   */
 822
 823   draw_status(context);
 824   context.pop_transform();
 825 }
 826
 827 void
 828 WorldMap::draw_status(DrawingContext& context)
 829 {
 830   context.push_transform();
 831   context.set_translation(Vector(0, 0));
 832
 833   player_status->draw(context);
 834
 835   if (!tux->is_moving()) {
 836     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 837       LevelTile* level = *i;
 838
 839       if (level->pos == tux->get_tile_pos()) {
 840         if(level->title == "")
 841           get_level_title(*level);
 842
 843         context.draw_text(Resources::normal_font, level->title,
 844                           Vector(SCREEN_WIDTH/2,
 845                                  SCREEN_HEIGHT - Resources::normal_font->get_height() - 10),
 846                           ALIGN_CENTER, LAYER_HUD, WorldMap::level_title_color);
 847
 848         // if level is solved, draw level picture behind stats
 849         /*
 850           if (level->solved) {
 851           if (const Surface* picture = level->get_picture()) {
 852           Vector pos = Vector(SCREEN_WIDTH - picture->get_width(), SCREEN_HEIGHT - picture->get_height());
 853           context.push_transform();
 854           context.set_alpha(0.5);
 855           context.draw_surface(picture, pos, LAYER_FOREGROUND1-1);
 856           context.pop_transform();
 857           }
 858           }
 859         */
 860
 861         level->statistics.draw_worldmap_info(context);
 862         break;
 863       }
 864     }
 865
 866     for(SpecialTiles::iterator i = special_tiles.begin();
 867         i != special_tiles.end(); ++i) {
 868       SpecialTile* special_tile = *i;
 869
 870       if (special_tile->pos == tux->get_tile_pos()) {
 871         /* Display an in-map message in the map, if any as been selected */
 872         if(!special_tile->map_message.empty() && !special_tile->passive_message)
 873           context.draw_text(Resources::normal_font, special_tile->map_message,
 874                             Vector(SCREEN_WIDTH/2,
 875                                    SCREEN_HEIGHT - Resources::normal_font->get_height() - 60),
 876                             ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::message_color);
 877         break;
 878       }
 879     }
 880
 881     // display teleporter messages
 882     Teleporter* teleporter = at_teleporter(tux->get_tile_pos());
 883     if (teleporter && (teleporter->message != "")) {
 884       Vector pos = Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT - Resources::normal_font->get_height() - 30);
 885       context.draw_text(Resources::normal_font, teleporter->message, pos, ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::teleporter_message_color);
 886     }
 887
 888   }
 889
 890   /* Display a passive message in the map, if needed */
 891   if(passive_message_timer.started())
 892     context.draw_text(Resources::normal_font, passive_message,
 893                       Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT - Resources::normal_font->get_height() - 60),
 894                       ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::message_color);
 895
 896   context.pop_transform();
 897 }
 898
 899 void
 900 WorldMap::setup()
 901 {
 902   sound_manager->play_music(music);
 903   MenuManager::set_current(NULL);
 904
 905   current_ = this;
 906   load_state();
 907
 908   // if force_spawnpoint was set, move Tux there, then clear force_spawnpoint
 909   if (force_spawnpoint != "") {
 910     move_to_spawnpoint(force_spawnpoint);
 911     force_spawnpoint = "";
 912   }
 913
 914   tux->setup();
 915
 916   // register worldmap_table as worldmap in scripting
 917   using namespace scripting;
 918
 919   sq_pushroottable(global_vm);
 920   sq_pushstring(global_vm, "worldmap", -1);
 921   sq_pushobject(global_vm, worldmap_table);
 922   if(SQ_FAILED(sq_createslot(global_vm, -3)))
 923     throw SquirrelError(global_vm, "Couldn't set worldmap in roottable");
 924   sq_pop(global_vm, 1);
 925
 926   //Run default.nut just before init script
 927   try {
 928     IFileStream in(levels_path + "/default.nut");
 929     run_script(in, "WorldMap::default.nut");
 930   } catch(std::exception& ) {
 931     // doesn't exist or erroneous; do nothing
 932   }
 933
 934   if(init_script != "") {
 935     std::istringstream in(init_script);
 936     run_script(in, "WorldMap::init");
 937   }
 938 }
 939
 940 void
 941 WorldMap::leave()
 942 {
 943   using namespace scripting;
 944
 945   // save state of world and player
 946   save_state();
 947
 948   // remove worldmap_table from roottable
 949   sq_pushroottable(global_vm);
 950   sq_pushstring(global_vm, "worldmap", -1);
 951   if(SQ_FAILED(sq_deleteslot(global_vm, -2, SQFalse)))
 952     throw SquirrelError(global_vm, "Couldn't unset worldmap in roottable");
 953   sq_pop(global_vm, 1);
 954 }
 955
 956 void
 957 WorldMap::save_state()
 958 {
 959   using namespace scripting;
 960
 961   HSQUIRRELVM vm = global_vm;
 962   int oldtop = sq_gettop(vm);
 963
 964   try {
 965     // get state table
 966     sq_pushroottable(vm);
 967     sq_pushstring(vm, "state", -1);
 968     if(SQ_FAILED(sq_get(vm, -2)))
 969       throw scripting::SquirrelError(vm, "Couldn't get state table");
 970
 971     // get or create worlds table
 972     sq_pushstring(vm, "worlds", -1);
 973     if(SQ_FAILED(sq_get(vm, -2))) {
 974       sq_pushstring(vm, "worlds", -1);
 975       sq_newtable(vm);
 976       if(SQ_FAILED(sq_createslot(vm, -3)))
 977         throw scripting::SquirrelError(vm, "Couldn't create state.worlds");
 978
 979       sq_pushstring(vm, "worlds", -1);
 980       if(SQ_FAILED(sq_get(vm, -2)))
 981         throw scripting::SquirrelError(vm, "Couldn't create.get state.worlds");
 982     }
 983
 984     sq_pushstring(vm, map_filename.c_str(), map_filename.length());
 985     if(SQ_FAILED(sq_deleteslot(vm, -2, SQFalse)))
 986       sq_pop(vm, 1);
 987
 988     // construct new table for this worldmap
 989     sq_pushstring(vm, map_filename.c_str(), map_filename.length());
 990     sq_newtable(vm);
 991
 992     // store tux
 993     sq_pushstring(vm, "tux", -1);
 994     sq_newtable(vm);
 995
 996     store_float(vm, "x", tux->get_tile_pos().x);
 997     store_float(vm, "y", tux->get_tile_pos().y);
 998     store_string(vm, "back", direction_to_string(tux->back_direction));
 999
1000     sq_createslot(vm, -3);
1001
1002     // levels...
1003     sq_pushstring(vm, "levels", -1);
1004     sq_newtable(vm);
1005
1006     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
1007       LevelTile* level = *i;
1008
1009       sq_pushstring(vm, level->get_name().c_str(), -1);
1010       sq_newtable(vm);
1011
1012       store_bool(vm, "solved", level->solved);
1013       store_bool(vm, "perfect", level->perfect);
1014       level->statistics.serialize_to_squirrel(vm);
1015
1016       sq_createslot(vm, -3);
1017     }
1018
1019     sq_createslot(vm, -3);
1020
1021     // overall statistics...
1022     total_stats.serialize_to_squirrel(vm);
1023
1024     // push world into worlds table
1025     sq_createslot(vm, -3);
1026   } catch(std::exception& ) {
1027     sq_settop(vm, oldtop);
1028   }
1029
1030   sq_settop(vm, oldtop);
1031
1032   if(World::current() != NULL)
1033     World::current()->save_state();
1034 }
1035
1036 void
1037 WorldMap::load_state()
1038 {
1039   using namespace scripting;
1040
1041   HSQUIRRELVM vm = global_vm;
1042   int oldtop = sq_gettop(vm);
1043
1044   try {
1045     // get state table
1046     sq_pushroottable(vm);
1047     sq_pushstring(vm, "state", -1);
1048     if(SQ_FAILED(sq_get(vm, -2)))
1049       throw scripting::SquirrelError(vm, "Couldn't get state table");
1050
1051     // get worlds table
1052     sq_pushstring(vm, "worlds", -1);
1053     if(SQ_FAILED(sq_get(vm, -2)))
1054       throw scripting::SquirrelError(vm, "Couldn't get state.worlds");
1055
1056     // get table for our world
1057     sq_pushstring(vm, map_filename.c_str(), map_filename.length());
1058     if(SQ_FAILED(sq_get(vm, -2)))
1059       throw scripting::SquirrelError(vm, "Couldn't get state.worlds.mapfilename");
1060
1061     // load tux
1062     sq_pushstring(vm, "tux", -1);
1063     if(SQ_FAILED(sq_get(vm, -2)))
1064       throw scripting::SquirrelError(vm, "Couldn't get tux");
1065
1066     Vector p;
1067     p.x = read_float(vm, "x");
1068     p.y = read_float(vm, "y");
1069     std::string back_str = read_string(vm, "back");
1070     tux->back_direction = string_to_direction(back_str);
1071     tux->set_tile_pos(p);
1072
1073     sq_pop(vm, 1);
1074
1075     // load levels
1076     sq_pushstring(vm, "levels", -1);
1077     if(SQ_FAILED(sq_get(vm, -2)))
1078       throw scripting::SquirrelError(vm, "Couldn't get levels");
1079
1080     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
1081       LevelTile* level = *i;
1082       sq_pushstring(vm, level->get_name().c_str(), -1);
1083       if(SQ_SUCCEEDED(sq_get(vm, -2))) {
1084         level->solved = read_bool(vm, "solved");
1085         level->perfect = read_bool(vm, "perfect");
1086         if(!level->solved)
1087           level->sprite->set_action("default");
1088         else
1089           level->sprite->set_action((level->sprite->has_action("perfect") && level->perfect) ? "perfect" : "solved");
1090         level->statistics.unserialize_from_squirrel(vm);
1091         sq_pop(vm, 1);
1092       }
1093     }
1094
1095     // leave state table
1096     sq_pop(vm, 1);
1097
1098     // load overall statistics
1099     total_stats.unserialize_from_squirrel(vm);
1100
1101   } catch(std::exception& e) {
1102     log_debug << "Not loading worldmap state: " << e.what() << std::endl;
1103   }
1104   sq_settop(vm, oldtop);
1105
1106   in_level = false;
1107 }
1108
1109 size_t
1110 WorldMap::level_count()
1111 {
1112   return levels.size();
1113 }
1114
1115 size_t
1116 WorldMap::solved_level_count()
1117 {
1118   size_t count = 0;
1119   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
1120     LevelTile* level = *i;
1121
1122     if(level->solved)
1123       count++;
1124   }
1125
1126   return count;
1127 }
1128
1129 HSQUIRRELVM
1130 WorldMap::run_script(std::istream& in, const std::string& sourcename)
1131 {
1132   using namespace scripting;
1133
1134   // garbage collect thread list
1135   for(ScriptList::iterator i = scripts.begin();
1136       i != scripts.end(); ) {
1137     HSQOBJECT& object = *i;
1138     HSQUIRRELVM vm = object_to_vm(object);
1139
1140     if(sq_getvmstate(vm) != SQ_VMSTATE_SUSPENDED) {
1141       sq_release(global_vm, &object);
1142       i = scripts.erase(i);
1143       continue;
1144     }
1145
1146     ++i;
1147   }
1148
1149   HSQOBJECT object = create_thread(global_vm);
1150   scripts.push_back(object);
1151
1152   HSQUIRRELVM vm = object_to_vm(object);
1153
1154   // set worldmap_table as roottable for the thread
1155   sq_pushobject(vm, worldmap_table);
1156   sq_setroottable(vm);
1157
1158   compile_and_run(vm, in, sourcename);
1159
1160   return vm;
1161 }
1162
1163 float
1164 WorldMap::get_width() const
1165 {
1166   float width = 0;
1167   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
1168     TileMap* solids = *i;
1169     if (solids->get_width() > width) width = solids->get_width();
1170   }
1171   return width;
1172 }
1173
1174 float
1175 WorldMap::get_height() const
1176 {
1177   float height = 0;
1178   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
1179     TileMap* solids = *i;
1180     if (solids->get_height() > height) height = solids->get_height();
1181   }
1182   return height;
1183 }
1184
1185 } // namespace worldmap
1186
1187 /* EOF */