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/input_manager.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_streambuf.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   camera_offset(),
  86   name(),
  87   music(),
  88   init_script(),
  89   game_objects(),
  90   solid_tilemaps(),
  91   passive_message_timer(),
  92   passive_message(),
  93   map_filename(),
  94   levels_path(),
  95   special_tiles(),
  96   levels(),
  97   sprite_changes(),
  98   spawn_points(),
  99   teleporters(),
 100   total_stats(),
 101   worldmap_table(),
 102   scripts(),
 103   ambient_light( 1.0f, 1.0f, 1.0f, 1.0f ),
 104   force_spawnpoint(force_spawnpoint),
 105   in_level(false),
 106   pan_pos(),
 107   panning(false)
 108 {
 109   tux = new Tux(this);
 110   add_object(tux);
 111
 112   name = "<no title>";
 113   music = "music/salcon.ogg";
 114
 115   total_stats.reset();
 116
 117   // create a new squirrel table for the worldmap
 118   using namespace scripting;
 119
 120   sq_collectgarbage(global_vm);
 121   sq_newtable(global_vm);
 122   sq_pushroottable(global_vm);
 123   if(SQ_FAILED(sq_setdelegate(global_vm, -2)))
 124     throw scripting::SquirrelError(global_vm, "Couldn't set worldmap_table delegate");
 125
 126   sq_resetobject(&worldmap_table);
 127   if(SQ_FAILED(sq_getstackobj(global_vm, -1, &worldmap_table)))
 128     throw scripting::SquirrelError(global_vm, "Couldn't get table from stack");
 129
 130   sq_addref(global_vm, &worldmap_table);
 131   sq_pop(global_vm, 1);
 132
 133   sound_manager->preload("sounds/warp.wav");
 134
 135   // load worldmap objects
 136   load(filename);
 137 }
 138
 139 WorldMap::~WorldMap()
 140 {
 141   using namespace scripting;
 142
 143   if(free_tileset)
 144     delete tileset;
 145
 146   for(GameObjects::iterator i = game_objects.begin();
 147       i != game_objects.end(); ++i) {
 148     GameObject* object = *i;
 149     try_unexpose(object);
 150     object->unref();
 151   }
 152
 153   for(SpawnPoints::iterator i = spawn_points.begin();
 154       i != spawn_points.end(); ++i) {
 155     delete *i;
 156   }
 157
 158   for(ScriptList::iterator i = scripts.begin();
 159       i != scripts.end(); ++i) {
 160     HSQOBJECT& object = *i;
 161     sq_release(global_vm, &object);
 162   }
 163   sq_release(global_vm, &worldmap_table);
 164
 165   sq_collectgarbage(global_vm);
 166
 167   if(current_ == this)
 168     current_ = NULL;
 169 }
 170
 171 void
 172 WorldMap::add_object(GameObject* object)
 173 {
 174   TileMap* tilemap = dynamic_cast<TileMap*> (object);
 175   if(tilemap != 0 && tilemap->is_solid()) {
 176     solid_tilemaps.push_back(tilemap);
 177   }
 178
 179   object->ref();
 180   try_expose(object);
 181   game_objects.push_back(object);
 182 }
 183
 184 void
 185 WorldMap::try_expose(GameObject* object)
 186 {
 187   ScriptInterface* object_ = dynamic_cast<ScriptInterface*> (object);
 188   if(object_ != NULL) {
 189     HSQUIRRELVM vm = scripting::global_vm;
 190     sq_pushobject(vm, worldmap_table);
 191     object_->expose(vm, -1);
 192     sq_pop(vm, 1);
 193   }
 194 }
 195
 196 void
 197 WorldMap::try_unexpose(GameObject* object)
 198 {
 199   ScriptInterface* object_ = dynamic_cast<ScriptInterface*> (object);
 200   if(object_ != NULL) {
 201     HSQUIRRELVM vm = scripting::global_vm;
 202     SQInteger oldtop = sq_gettop(vm);
 203     sq_pushobject(vm, worldmap_table);
 204     try {
 205       object_->unexpose(vm, -1);
 206     } catch(std::exception& e) {
 207       log_warning << "Couldn't unregister object: " << e.what() << std::endl;
 208     }
 209     sq_settop(vm, oldtop);
 210   }
 211 }
 212
 213 void
 214 WorldMap::move_to_spawnpoint(const std::string& spawnpoint, bool pan)
 215 {
 216   for(SpawnPoints::iterator i = spawn_points.begin(); i != spawn_points.end(); ++i) {
 217     SpawnPoint* sp = *i;
 218     if(sp->name == spawnpoint) {
 219       Vector p = sp->pos;
 220       tux->set_tile_pos(p);
 221       tux->set_direction(sp->auto_dir);
 222       if(pan) {
 223         panning = true;
 224         pan_pos = get_camera_pos_for_tux();
 225         clamp_camera_position(pan_pos);
 226       }
 227       return;
 228     }
 229   }
 230   log_warning << "Spawnpoint '" << spawnpoint << "' not found." << std::endl;
 231   if (spawnpoint != "main") {
 232     move_to_spawnpoint("main");
 233   }
 234 }
 235
 236 void
 237 WorldMap::change(const std::string& filename, const std::string& force_spawnpoint)
 238 {
 239   g_screen_manager->exit_screen();
 240   g_screen_manager->push_screen(std::unique_ptr<Screen>(new WorldMap(filename, player_status, force_spawnpoint)));
 241 }
 242
 243 void
 244 WorldMap::load(const std::string& filename)
 245 {
 246   map_filename = filename;
 247   levels_path = FileSystem::dirname(map_filename);
 248
 249   try {
 250     lisp::Parser parser;
 251     const lisp::Lisp* root = parser.parse(map_filename);
 252
 253     const lisp::Lisp* level = root->get_lisp("supertux-level");
 254     if(level == NULL)
 255       throw std::runtime_error("file isn't a supertux-level file.");
 256
 257     level->get("name", name);
 258
 259     const lisp::Lisp* sector = level->get_lisp("sector");
 260     if(!sector)
 261       throw std::runtime_error("No sector specified in worldmap file.");
 262
 263     const lisp::Lisp* tilesets_lisp = level->get_lisp("tilesets");
 264     if(tilesets_lisp != NULL) {
 265       tileset      = tile_manager->parse_tileset_definition(*tilesets_lisp);
 266       free_tileset = true;
 267     }
 268     std::string tileset_name;
 269     if(level->get("tileset", tileset_name)) {
 270       if(tileset != NULL) {
 271         log_warning << "multiple tilesets specified in level" << std::endl;
 272       } else {
 273         tileset = tile_manager->get_tileset(tileset_name);
 274       }
 275     }
 276     /* load default tileset */
 277     if(tileset == NULL) {
 278       tileset = tile_manager->get_tileset("images/worldmap.strf");
 279     }
 280     current_tileset = tileset;
 281
 282     lisp::ListIterator iter(sector);
 283     while(iter.next()) {
 284       if(iter.item() == "tilemap") {
 285         add_object(new TileMap(*(iter.lisp())));
 286       } else if(iter.item() == "background") {
 287         add_object(new Background(*(iter.lisp())));
 288       } else if(iter.item() == "music") {
 289         iter.value()->get(music);
 290       } else if(iter.item() == "init-script") {
 291         iter.value()->get(init_script);
 292       } else if(iter.item() == "worldmap-spawnpoint") {
 293         SpawnPoint* sp = new SpawnPoint(*iter.lisp());
 294         spawn_points.push_back(sp);
 295       } else if(iter.item() == "level") {
 296         LevelTile* level = new LevelTile(levels_path, *iter.lisp());
 297         levels.push_back(level);
 298         add_object(level);
 299       } else if(iter.item() == "special-tile") {
 300         SpecialTile* special_tile = new SpecialTile(*iter.lisp());
 301         special_tiles.push_back(special_tile);
 302         add_object(special_tile);
 303       } else if(iter.item() == "sprite-change") {
 304         SpriteChange* sprite_change = new SpriteChange(*iter.lisp());
 305         sprite_changes.push_back(sprite_change);
 306         add_object(sprite_change);
 307       } else if(iter.item() == "teleporter") {
 308         Teleporter* teleporter = new Teleporter(*iter.lisp());
 309         teleporters.push_back(teleporter);
 310         add_object(teleporter);
 311       } else if(iter.item() == "decal") {
 312         Decal* decal = new Decal(*iter.lisp());
 313         add_object(decal);
 314       } else if(iter.item() == "ambient-light") {
 315         std::vector<float> vColor;
 316         sector->get( "ambient-light", vColor );
 317         if(vColor.size() < 3) {
 318           log_warning << "(ambient-light) requires a color as argument" << std::endl;
 319         } else {
 320           ambient_light = Color( vColor );
 321         }
 322       } else if(iter.item() == "name") {
 323         // skip
 324       } else {
 325         log_warning << "Unknown token '" << iter.item() << "' in worldmap" << std::endl;
 326       }
 327     }
 328     current_tileset = NULL;
 329
 330     if(solid_tilemaps.size() == 0)
 331       throw std::runtime_error("No solid tilemap specified");
 332
 333     move_to_spawnpoint("main");
 334
 335   } catch(std::exception& e) {
 336     std::stringstream msg;
 337     msg << "Problem when parsing worldmap '" << map_filename << "': " <<
 338       e.what();
 339     throw std::runtime_error(msg.str());
 340   }
 341 }
 342
 343 void
 344 WorldMap::get_level_title(LevelTile& level)
 345 {
 346   /** get special_tile's title */
 347   level.title = "<no title>";
 348
 349   try {
 350     lisp::Parser parser;
 351     const lisp::Lisp* root = parser.parse(levels_path + level.get_name());
 352
 353     const lisp::Lisp* level_lisp = root->get_lisp("supertux-level");
 354     if(!level_lisp)
 355       return;
 356
 357     level_lisp->get("name", level.title);
 358   } catch(std::exception& e) {
 359     log_warning << "Problem when reading leveltitle: " << e.what() << std::endl;
 360     return;
 361   }
 362 }
 363
 364 void
 365 WorldMap::get_level_target_time(LevelTile& level)
 366 {
 367   if(last_position == tux->get_tile_pos()) {
 368     level.target_time = last_target_time;
 369     return;
 370   }
 371
 372   try {
 373     lisp::Parser parser;
 374     const lisp::Lisp* root = parser.parse(levels_path + level.get_name());
 375
 376     const lisp::Lisp* level_lisp = root->get_lisp("supertux-level");
 377     if(!level_lisp)
 378       return;
 379
 380     level_lisp->get("target-time", level.target_time);
 381
 382     last_position = level.pos;
 383     last_target_time = level.target_time;
 384
 385   } catch(std::exception& e) {
 386     log_warning << "Problem when reading level target time: " << e.what() << std::endl;
 387     return;
 388   }
 389 }
 390
 391 void WorldMap::calculate_total_stats()
 392 {
 393   total_stats.zero();
 394   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 395     LevelTile* level = *i;
 396     if (level->solved) {
 397       total_stats += level->statistics;
 398     }
 399   }
 400 }
 401
 402 void
 403 WorldMap::on_escape_press()
 404 {
 405   // Show or hide the menu
 406   if(!MenuManager::instance().is_active()) {
 407     MenuManager::instance().set_current(MenuStorage::WORLDMAP_MENU);
 408     tux->set_direction(D_NONE);  // stop tux movement when menu is called
 409   } else {
 410     MenuManager::instance().set_current(MenuStorage::NO_MENU);
 411   }
 412 }
 413
 414 Vector
 415 WorldMap::get_next_tile(Vector pos, Direction direction)
 416 {
 417   switch(direction) {
 418     case D_WEST:
 419       pos.x -= 1;
 420       break;
 421     case D_EAST:
 422       pos.x += 1;
 423       break;
 424     case D_NORTH:
 425       pos.y -= 1;
 426       break;
 427     case D_SOUTH:
 428       pos.y += 1;
 429       break;
 430     case D_NONE:
 431       break;
 432   }
 433   return pos;
 434 }
 435
 436 bool
 437 WorldMap::path_ok(Direction direction, const Vector& old_pos, Vector* new_pos)
 438 {
 439   *new_pos = get_next_tile(old_pos, direction);
 440
 441   if (!(new_pos->x >= 0 && new_pos->x < get_width()
 442         && new_pos->y >= 0 && new_pos->y < get_height()))
 443   { // New position is outsite the tilemap
 444     return false;
 445   }
 446   else
 447   { // Check if the tile allows us to go to new_pos
 448     int old_tile_data = tile_data_at(old_pos);
 449     int new_tile_data = tile_data_at(*new_pos);
 450     switch(direction)
 451     {
 452       case D_WEST:
 453         return (old_tile_data & Tile::WORLDMAP_WEST
 454                 && new_tile_data & Tile::WORLDMAP_EAST);
 455
 456       case D_EAST:
 457         return (old_tile_data & Tile::WORLDMAP_EAST
 458                 && new_tile_data & Tile::WORLDMAP_WEST);
 459
 460       case D_NORTH:
 461         return (old_tile_data & Tile::WORLDMAP_NORTH
 462                 && new_tile_data & Tile::WORLDMAP_SOUTH);
 463
 464       case D_SOUTH:
 465         return (old_tile_data & Tile::WORLDMAP_SOUTH
 466                 && new_tile_data & Tile::WORLDMAP_NORTH);
 467
 468       case D_NONE:
 469         assert(!"path_ok() can't walk if direction is NONE");
 470     }
 471     return false;
 472   }
 473 }
 474
 475 void
 476 WorldMap::finished_level(Level* gamelevel)
 477 {
 478   // TODO use Level* parameter here?
 479   LevelTile* level = at_level();
 480
 481   bool old_level_state = level->solved;
 482   level->solved = true;
 483   level->sprite->set_action("solved");
 484
 485   // deal with statistics
 486   level->statistics.merge(gamelevel->stats);
 487   calculate_total_stats();
 488   get_level_target_time(*level);
 489   if(level->statistics.completed(level->statistics, level->target_time)) {
 490     level->perfect = true;
 491     if(level->sprite->has_action("perfect"))
 492       level->sprite->set_action("perfect");
 493   }
 494
 495   save_state();
 496
 497   if (old_level_state != level->solved) {
 498     // Try to detect the next direction to which we should walk
 499     // FIXME: Mostly a hack
 500     Direction dir = D_NONE;
 501
 502     int dirdata = available_directions_at(tux->get_tile_pos());
 503     // first, test for crossroads
 504     if (dirdata == Tile::WORLDMAP_CNSE ||
 505         dirdata == Tile::WORLDMAP_CNSW ||
 506         dirdata == Tile::WORLDMAP_CNEW ||
 507         dirdata == Tile::WORLDMAP_CSEW ||
 508         dirdata == Tile::WORLDMAP_CNSEW)
 509       dir = D_NONE;
 510     else if (dirdata & Tile::WORLDMAP_NORTH
 511              && tux->back_direction != D_NORTH)
 512       dir = D_NORTH;
 513     else if (dirdata & Tile::WORLDMAP_SOUTH
 514              && tux->back_direction != D_SOUTH)
 515       dir = D_SOUTH;
 516     else if (dirdata & Tile::WORLDMAP_EAST
 517              && tux->back_direction != D_EAST)
 518       dir = D_EAST;
 519     else if (dirdata & Tile::WORLDMAP_WEST
 520              && tux->back_direction != D_WEST)
 521       dir = D_WEST;
 522
 523     if (dir != D_NONE) {
 524       tux->set_direction(dir);
 525     }
 526   }
 527
 528   if (level->extro_script != "") {
 529     try {
 530       std::istringstream in(level->extro_script);
 531       run_script(in, "worldmap:extro_script");
 532     } catch(std::exception& e) {
 533       log_warning << "Couldn't run level-extro-script: " << e.what() << std::endl;
 534     }
 535   }
 536 }
 537
 538 Vector
 539 WorldMap::get_camera_pos_for_tux() {
 540   Vector camera_offset;
 541   Vector tux_pos = tux->get_pos();
 542   camera_offset.x = tux_pos.x - SCREEN_WIDTH/2;
 543   camera_offset.y = tux_pos.y - SCREEN_HEIGHT/2;
 544   return camera_offset;
 545 }
 546
 547 void
 548 WorldMap::clamp_camera_position(Vector& c) {
 549   if (c.x < 0)
 550     c.x = 0;
 551   if (c.y < 0)
 552     c.y = 0;
 553
 554   if (c.x > (int)get_width()*32 - SCREEN_WIDTH)
 555     c.x = (int)get_width()*32 - SCREEN_WIDTH;
 556   if (c.y > (int)get_height()*32 - SCREEN_HEIGHT)
 557     c.y = (int)get_height()*32 - SCREEN_HEIGHT;
 558
 559   if (int(get_width()*32) < SCREEN_WIDTH)
 560     c.x = get_width()*16.0 - SCREEN_WIDTH/2.0;
 561   if (int(get_height()*32) < SCREEN_HEIGHT)
 562     c.y = get_height()*16.0 - SCREEN_HEIGHT/2.0;
 563 }
 564
 565 void
 566 WorldMap::update(float delta)
 567 {
 568   if(!in_level) {
 569     if (MenuManager::instance().check_menu())
 570     {
 571       return;
 572     }
 573
 574     // update GameObjects
 575     for(size_t i = 0; i < game_objects.size(); ++i) {
 576       GameObject* object = game_objects[i];
 577       if(!panning || object != tux) {
 578         object->update(delta);
 579       }
 580     }
 581
 582     // remove old GameObjects
 583     for(GameObjects::iterator i = game_objects.begin();
 584         i != game_objects.end(); ) {
 585       GameObject* object = *i;
 586       if(!object->is_valid()) {
 587         try_unexpose(object);
 588         object->unref();
 589         i = game_objects.erase(i);
 590       } else {
 591         ++i;
 592       }
 593     }
 594
 595     /* update solid_tilemaps list */
 596     //FIXME: this could be more efficient
 597     solid_tilemaps.clear();
 598     for(std::vector<GameObject*>::iterator i = game_objects.begin();
 599         i != game_objects.end(); ++i)
 600     {
 601       TileMap* tm = dynamic_cast<TileMap*>(*i);
 602       if (!tm) continue;
 603       if (tm->is_solid()) solid_tilemaps.push_back(tm);
 604     }
 605
 606     Vector requested_pos;
 607
 608     // position "camera"
 609     if(!panning) {
 610       camera_offset = get_camera_pos_for_tux();
 611     } else {
 612       Vector delta = pan_pos - camera_offset;
 613       float mag = delta.norm();
 614       if(mag > CAMERA_PAN_SPEED) {
 615         delta *= CAMERA_PAN_SPEED/mag;
 616       }
 617       camera_offset += delta;
 618       if(camera_offset == pan_pos) {
 619         panning = false;
 620       }
 621     }
 622
 623     requested_pos = camera_offset;
 624     clamp_camera_position(camera_offset);
 625
 626     if(panning) {
 627       if(requested_pos.x != camera_offset.x) {
 628         pan_pos.x = camera_offset.x;
 629       }
 630       if(requested_pos.y != camera_offset.y) {
 631         pan_pos.y = camera_offset.y;
 632       }
 633     }
 634
 635     // handle input
 636     Controller *controller = g_input_manager->get_controller();
 637     bool enter_level = false;
 638     if(controller->pressed(Controller::ACTION)
 639        || controller->pressed(Controller::JUMP)
 640        || controller->pressed(Controller::MENU_SELECT)) {
 641       /* some people define UP and JUMP on the same key... */
 642       if(!controller->pressed(Controller::UP))
 643         enter_level = true;
 644     }
 645     if(controller->pressed(Controller::PAUSE_MENU))
 646       on_escape_press();
 647
 648     // check for teleporters
 649     Teleporter* teleporter = at_teleporter(tux->get_tile_pos());
 650     if (teleporter && (teleporter->automatic || (enter_level && (!tux->is_moving())))) {
 651       enter_level = false;
 652       if (teleporter->worldmap != "") {
 653         change(teleporter->worldmap, teleporter->spawnpoint);
 654       } else {
 655         // TODO: an animation, camera scrolling or a fading would be a nice touch
 656         sound_manager->play("sounds/warp.wav");
 657         tux->back_direction = D_NONE;
 658         move_to_spawnpoint(teleporter->spawnpoint, true);
 659       }
 660     }
 661
 662     // check for auto-play levels
 663     LevelTile* level = at_level();
 664     if (level && (level->auto_play) && (!level->solved) && (!tux->is_moving())) {
 665       enter_level = true;
 666       // automatically mark these levels as solved in case player aborts
 667       level->solved = true;
 668     }
 669
 670     if (enter_level && !tux->is_moving())
 671     {
 672       /* Check level action */
 673       LevelTile* level = at_level();
 674       if (!level) {
 675         //Respawn if player on a tile with no level and nowhere to go.
 676         int tile_data = tile_data_at(tux->get_tile_pos());
 677         if(!( tile_data & ( Tile::WORLDMAP_NORTH |  Tile::WORLDMAP_SOUTH | Tile::WORLDMAP_WEST | Tile::WORLDMAP_EAST ))){
 678           log_warning << "Player at illegal position " << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << " respawning." << std::endl;
 679           move_to_spawnpoint("main");
 680           return;
 681         }
 682         log_warning << "No level to enter at: " << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 683         return;
 684       }
 685
 686       if (level->pos == tux->get_tile_pos()) {
 687         try {
 688           Vector shrinkpos = Vector(level->pos.x*32 + 16 - camera_offset.x,
 689                                     level->pos.y*32 +  8 - camera_offset.y);
 690           std::string levelfile = levels_path + level->get_name();
 691
 692           // update state and savegame
 693           save_state();
 694
 695           g_screen_manager->push_screen(std::unique_ptr<Screen>(new GameSession(levelfile, player_status, &level->statistics)),
 696                                         std::unique_ptr<ScreenFade>(new ShrinkFade(shrinkpos, 1.0f)));
 697           in_level = true;
 698         } catch(std::exception& e) {
 699           log_fatal << "Couldn't load level: " << e.what() << std::endl;
 700         }
 701       }
 702     }
 703     else
 704     {
 705       //      tux->set_direction(input_direction);
 706     }
 707   }
 708 }
 709
 710 int
 711 WorldMap::tile_data_at(Vector p)
 712 {
 713   int dirs = 0;
 714
 715   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
 716     TileMap* tilemap = *i;
 717     const Tile* tile = tilemap->get_tile((int)p.x, (int)p.y);
 718     int dirdata = tile->getData();
 719     dirs |= dirdata;
 720   }
 721
 722   return dirs;
 723 }
 724
 725 int
 726 WorldMap::available_directions_at(Vector p)
 727 {
 728   return tile_data_at(p) & Tile::WORLDMAP_DIR_MASK;
 729 }
 730
 731 LevelTile*
 732 WorldMap::at_level()
 733 {
 734   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 735     LevelTile* level = *i;
 736     if (level->pos == tux->get_tile_pos())
 737       return level;
 738   }
 739
 740   return NULL;
 741 }
 742
 743 SpecialTile*
 744 WorldMap::at_special_tile()
 745 {
 746   for(SpecialTiles::iterator i = special_tiles.begin();
 747       i != special_tiles.end(); ++i) {
 748     SpecialTile* special_tile = *i;
 749     if (special_tile->pos == tux->get_tile_pos())
 750       return special_tile;
 751   }
 752
 753   return NULL;
 754 }
 755
 756 SpriteChange*
 757 WorldMap::at_sprite_change(const Vector& pos)
 758 {
 759   for(SpriteChanges::iterator i = sprite_changes.begin();
 760       i != sprite_changes.end(); ++i) {
 761     SpriteChange* sprite_change = *i;
 762     if(sprite_change->pos == pos)
 763       return sprite_change;
 764   }
 765
 766   return NULL;
 767 }
 768
 769 Teleporter*
 770 WorldMap::at_teleporter(const Vector& pos)
 771 {
 772   for(std::vector<Teleporter*>::iterator i = teleporters.begin(); i != teleporters.end(); ++i) {
 773     Teleporter* teleporter = *i;
 774     if(teleporter->pos == pos) return teleporter;
 775   }
 776
 777   return NULL;
 778 }
 779
 780 void
 781 WorldMap::draw(DrawingContext& context)
 782 {
 783   if (int(get_width()*32) < SCREEN_WIDTH || int(get_height()*32) < SCREEN_HEIGHT)
 784     context.draw_filled_rect(Vector(0, 0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 785                              Color(0.0f, 0.0f, 0.0f, 1.0f), LAYER_BACKGROUND0);
 786
 787   context.set_ambient_color( ambient_light );
 788   context.push_transform();
 789   context.set_translation(camera_offset);
 790
 791   for(GameObjects::iterator i = game_objects.begin();
 792       i != game_objects.end(); ++i) {
 793     GameObject* object = *i;
 794     if(!panning || object != tux) {
 795       object->draw(context);
 796     }
 797   }
 798
 799   /*
 800   // FIXME: make this a runtime switch similar to draw_collrects/show_collrects?
 801   // draw visual indication of possible walk directions
 802   static int flipme = 0;
 803   if (flipme++ & 0x04)
 804   for (int x = 0; x < get_width(); x++) {
 805   for (int y = 0; y < get_height(); y++) {
 806   int data = tile_data_at(Vector(x,y));
 807   int px = x * 32;
 808   int py = y * 32;
 809   const int W = 4;
 810   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);
 811   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);
 812   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);
 813   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);
 814   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);
 815   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);
 816   }
 817   }
 818   */
 819
 820   draw_status(context);
 821   context.pop_transform();
 822 }
 823
 824 void
 825 WorldMap::draw_status(DrawingContext& context)
 826 {
 827   context.push_transform();
 828   context.set_translation(Vector(0, 0));
 829
 830   player_status->draw(context);
 831
 832   if (!tux->is_moving()) {
 833     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 834       LevelTile* level = *i;
 835
 836       if (level->pos == tux->get_tile_pos()) {
 837         if(level->title == "")
 838           get_level_title(*level);
 839
 840         context.draw_text(Resources::normal_font, level->title,
 841                           Vector(SCREEN_WIDTH/2,
 842                                  SCREEN_HEIGHT - Resources::normal_font->get_height() - 10),
 843                           ALIGN_CENTER, LAYER_HUD, WorldMap::level_title_color);
 844
 845         // if level is solved, draw level picture behind stats
 846         /*
 847           if (level->solved) {
 848           if (const Surface* picture = level->get_picture()) {
 849           Vector pos = Vector(SCREEN_WIDTH - picture->get_width(), SCREEN_HEIGHT - picture->get_height());
 850           context.push_transform();
 851           context.set_alpha(0.5);
 852           context.draw_surface(picture, pos, LAYER_FOREGROUND1-1);
 853           context.pop_transform();
 854           }
 855           }
 856         */
 857
 858         if (level->target_time == 0.0f)
 859           get_level_target_time(*level);
 860         level->statistics.draw_worldmap_info(context, level->target_time);
 861         break;
 862       }
 863     }
 864
 865     for(SpecialTiles::iterator i = special_tiles.begin();
 866         i != special_tiles.end(); ++i) {
 867       SpecialTile* special_tile = *i;
 868
 869       if (special_tile->pos == tux->get_tile_pos()) {
 870         /* Display an in-map message in the map, if any as been selected */
 871         if(!special_tile->map_message.empty() && !special_tile->passive_message)
 872           context.draw_text(Resources::normal_font, special_tile->map_message,
 873                             Vector(SCREEN_WIDTH/2,
 874                                    SCREEN_HEIGHT - Resources::normal_font->get_height() - 60),
 875                             ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::message_color);
 876         break;
 877       }
 878     }
 879
 880     // display teleporter messages
 881     Teleporter* teleporter = at_teleporter(tux->get_tile_pos());
 882     if (teleporter && (teleporter->message != "")) {
 883       Vector pos = Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT - Resources::normal_font->get_height() - 30);
 884       context.draw_text(Resources::normal_font, teleporter->message, pos, ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::teleporter_message_color);
 885     }
 886
 887   }
 888
 889   /* Display a passive message in the map, if needed */
 890   if(passive_message_timer.started())
 891     context.draw_text(Resources::normal_font, passive_message,
 892                       Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT - Resources::normal_font->get_height() - 60),
 893                       ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::message_color);
 894
 895   context.pop_transform();
 896 }
 897
 898 void
 899 WorldMap::setup()
 900 {
 901   sound_manager->play_music(music);
 902   MenuManager::instance().set_current(MenuStorage::NO_MENU);
 903
 904   current_ = this;
 905   load_state();
 906
 907   // if force_spawnpoint was set, move Tux there, then clear force_spawnpoint
 908   if (force_spawnpoint != "") {
 909     move_to_spawnpoint(force_spawnpoint);
 910     force_spawnpoint = "";
 911   }
 912
 913   tux->setup();
 914
 915   // register worldmap_table as worldmap in scripting
 916   using namespace scripting;
 917
 918   sq_pushroottable(global_vm);
 919   sq_pushstring(global_vm, "worldmap", -1);
 920   sq_pushobject(global_vm, worldmap_table);
 921   if(SQ_FAILED(sq_createslot(global_vm, -3)))
 922     throw SquirrelError(global_vm, "Couldn't set worldmap in roottable");
 923   sq_pop(global_vm, 1);
 924
 925   //Run default.nut just before init script
 926   try {
 927     IFileStreambuf ins(levels_path + "default.nut");
 928     std::istream in(&ins);
 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 */