src/worldmap/worldmap.cpp

   1 //  SuperTux -  A Jump'n Run
   2 //  Copyright (C) 2004 Ingo Ruhnke <grumbel@gmail.com>
   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/scripting.hpp"
  44 #include "scripting/squirrel_error.hpp"
  45 #include "scripting/squirrel_util.hpp"
  46 #include "sprite/sprite.hpp"
  47 #include "sprite/sprite_manager.hpp"
  48 #include "supertux/game_session.hpp"
  49 #include "supertux/gameconfig.hpp"
  50 #include "supertux/globals.hpp"
  51 #include "supertux/menu/menu_storage.hpp"
  52 #include "supertux/menu/options_menu.hpp"
  53 #include "supertux/menu/worldmap_menu.hpp"
  54 #include "supertux/player_status.hpp"
  55 #include "supertux/resources.hpp"
  56 #include "supertux/savegame.hpp"
  57 #include "supertux/screen_manager.hpp"
  58 #include "supertux/sector.hpp"
  59 #include "supertux/shrinkfade.hpp"
  60 #include "supertux/spawn_point.hpp"
  61 #include "supertux/textscroller.hpp"
  62 #include "supertux/tile_manager.hpp"
  63 #include "supertux/tile_set.hpp"
  64 #include "supertux/world.hpp"
  65 #include "util/file_system.hpp"
  66 #include "util/gettext.hpp"
  67 #include "util/log.hpp"
  68 #include "util/reader.hpp"
  69 #include "video/drawing_context.hpp"
  70 #include "video/surface.hpp"
  71 #include "worldmap/level.hpp"
  72 #include "worldmap/special_tile.hpp"
  73 #include "worldmap/sprite_change.hpp"
  74 #include "worldmap/tux.hpp"
  75 #include "worldmap/worldmap.hpp"
  76
  77 static const float CAMERA_PAN_SPEED = 5.0;
  78
  79 namespace worldmap {
  80
  81 WorldMap* WorldMap::current_ = NULL;
  82
  83 WorldMap::WorldMap(const std::string& filename, Savegame& savegame, const std::string& force_spawnpoint_) :
  84   tux(),
  85   m_savegame(savegame),
  86   tileset(NULL),
  87   free_tileset(false),
  88   camera_offset(),
  89   name(),
  90   music(),
  91   init_script(),
  92   game_objects(),
  93   solid_tilemaps(),
  94   passive_message_timer(),
  95   passive_message(),
  96   map_filename(),
  97   levels_path(),
  98   special_tiles(),
  99   levels(),
 100   sprite_changes(),
 101   spawn_points(),
 102   teleporters(),
 103   total_stats(),
 104   worldmap_table(),
 105   scripts(),
 106   ambient_light( 1.0f, 1.0f, 1.0f, 1.0f ),
 107   force_spawnpoint(force_spawnpoint_),
 108   in_level(false),
 109   pan_pos(),
 110   panning(false),
 111   last_position(),
 112   last_target_time()
 113 {
 114   tux = new Tux(this);
 115   add_object(tux);
 116
 117   name = "<no title>";
 118   music = "music/salcon.ogg";
 119
 120   total_stats.reset();
 121
 122   // create a new squirrel table for the worldmap
 123   using namespace scripting;
 124
 125   sq_collectgarbage(global_vm);
 126   sq_newtable(global_vm);
 127   sq_pushroottable(global_vm);
 128   if(SQ_FAILED(sq_setdelegate(global_vm, -2)))
 129     throw scripting::SquirrelError(global_vm, "Couldn't set worldmap_table delegate");
 130
 131   sq_resetobject(&worldmap_table);
 132   if(SQ_FAILED(sq_getstackobj(global_vm, -1, &worldmap_table)))
 133     throw scripting::SquirrelError(global_vm, "Couldn't get table from stack");
 134
 135   sq_addref(global_vm, &worldmap_table);
 136   sq_pop(global_vm, 1);
 137
 138   SoundManager::current()->preload("sounds/warp.wav");
 139
 140   // load worldmap objects
 141   load(filename);
 142 }
 143
 144 WorldMap::~WorldMap()
 145 {
 146   using namespace scripting;
 147
 148   if(free_tileset)
 149     delete tileset;
 150
 151   for(GameObjects::iterator i = game_objects.begin();
 152       i != game_objects.end(); ++i) {
 153     GameObject* object = *i;
 154     try_unexpose(object);
 155     object->unref();
 156   }
 157
 158   for(SpawnPoints::iterator i = spawn_points.begin();
 159       i != spawn_points.end(); ++i) {
 160     delete *i;
 161   }
 162
 163   for(ScriptList::iterator i = scripts.begin();
 164       i != scripts.end(); ++i) {
 165     HSQOBJECT& object = *i;
 166     sq_release(global_vm, &object);
 167   }
 168   sq_release(global_vm, &worldmap_table);
 169
 170   sq_collectgarbage(global_vm);
 171
 172   if(current_ == this)
 173     current_ = NULL;
 174 }
 175
 176 void
 177 WorldMap::add_object(GameObject* object)
 178 {
 179   TileMap* tilemap = dynamic_cast<TileMap*> (object);
 180   if(tilemap != 0 && tilemap->is_solid()) {
 181     solid_tilemaps.push_back(tilemap);
 182   }
 183
 184   object->ref();
 185   try_expose(object);
 186   game_objects.push_back(object);
 187 }
 188
 189 void
 190 WorldMap::try_expose(GameObject* object)
 191 {
 192   ScriptInterface* object_ = dynamic_cast<ScriptInterface*> (object);
 193   if(object_ != NULL) {
 194     HSQUIRRELVM vm = scripting::global_vm;
 195     sq_pushobject(vm, worldmap_table);
 196     object_->expose(vm, -1);
 197     sq_pop(vm, 1);
 198   }
 199 }
 200
 201 void
 202 WorldMap::try_unexpose(GameObject* object)
 203 {
 204   ScriptInterface* object_ = dynamic_cast<ScriptInterface*> (object);
 205   if(object_ != NULL) {
 206     HSQUIRRELVM vm = scripting::global_vm;
 207     SQInteger oldtop = sq_gettop(vm);
 208     sq_pushobject(vm, worldmap_table);
 209     try {
 210       object_->unexpose(vm, -1);
 211     } catch(std::exception& e) {
 212       log_warning << "Couldn't unregister object: " << e.what() << std::endl;
 213     }
 214     sq_settop(vm, oldtop);
 215   }
 216 }
 217
 218 void
 219 WorldMap::move_to_spawnpoint(const std::string& spawnpoint, bool pan)
 220 {
 221   for(SpawnPoints::iterator i = spawn_points.begin(); i != spawn_points.end(); ++i) {
 222     SpawnPoint* sp = *i;
 223     if(sp->name == spawnpoint) {
 224       Vector p = sp->pos;
 225       tux->set_tile_pos(p);
 226       tux->set_direction(sp->auto_dir);
 227       if(pan) {
 228         panning = true;
 229         pan_pos = get_camera_pos_for_tux();
 230         clamp_camera_position(pan_pos);
 231       }
 232       return;
 233     }
 234   }
 235   log_warning << "Spawnpoint '" << spawnpoint << "' not found." << std::endl;
 236   if (spawnpoint != "main") {
 237     move_to_spawnpoint("main");
 238   }
 239 }
 240
 241 void
 242 WorldMap::change(const std::string& filename, const std::string& force_spawnpoint_)
 243 {
 244   ScreenManager::current()->pop_screen();
 245   ScreenManager::current()->push_screen(std::unique_ptr<Screen>(new WorldMap(filename, m_savegame, force_spawnpoint_)));
 246 }
 247
 248 void
 249 WorldMap::load(const std::string& filename)
 250 {
 251   map_filename = filename;
 252   levels_path = FileSystem::dirname(map_filename);
 253
 254   try {
 255     lisp::Parser parser;
 256     const lisp::Lisp* root = parser.parse(map_filename);
 257
 258     const lisp::Lisp* level_ = root->get_lisp("supertux-level");
 259     if(level_ == NULL)
 260       throw std::runtime_error("file isn't a supertux-level file.");
 261
 262     level_->get("name", name);
 263
 264     const lisp::Lisp* sector = level_->get_lisp("sector");
 265     if(!sector)
 266       throw std::runtime_error("No sector specified in worldmap file.");
 267
 268     const lisp::Lisp* tilesets_lisp = level_->get_lisp("tilesets");
 269     if(tilesets_lisp != NULL) {
 270       tileset      = TileManager::current()->parse_tileset_definition(*tilesets_lisp).release();
 271       free_tileset = true;
 272     }
 273     std::string tileset_name;
 274     if(level_->get("tileset", tileset_name)) {
 275       if(tileset != NULL) {
 276         log_warning << "multiple tilesets specified in level_" << std::endl;
 277       } else {
 278         tileset = TileManager::current()->get_tileset(tileset_name);
 279       }
 280     }
 281     /* load default tileset */
 282     if(tileset == NULL) {
 283       tileset = TileManager::current()->get_tileset("images/worldmap.strf");
 284     }
 285     current_tileset = tileset;
 286
 287     lisp::ListIterator iter(sector);
 288     while(iter.next()) {
 289       if(iter.item() == "tilemap") {
 290         add_object(new TileMap(*(iter.lisp())));
 291       } else if(iter.item() == "background") {
 292         add_object(new Background(*(iter.lisp())));
 293       } else if(iter.item() == "music") {
 294         iter.value()->get(music);
 295       } else if(iter.item() == "init-script") {
 296         iter.value()->get(init_script);
 297       } else if(iter.item() == "worldmap-spawnpoint") {
 298         SpawnPoint* sp = new SpawnPoint(*iter.lisp());
 299         spawn_points.push_back(sp);
 300       } else if(iter.item() == "level") {
 301         LevelTile* level = new LevelTile(levels_path, *iter.lisp());
 302         levels.push_back(level);
 303         add_object(level);
 304       } else if(iter.item() == "special-tile") {
 305         SpecialTile* special_tile = new SpecialTile(*iter.lisp());
 306         special_tiles.push_back(special_tile);
 307         add_object(special_tile);
 308       } else if(iter.item() == "sprite-change") {
 309         SpriteChange* sprite_change = new SpriteChange(*iter.lisp());
 310         sprite_changes.push_back(sprite_change);
 311         add_object(sprite_change);
 312       } else if(iter.item() == "teleporter") {
 313         Teleporter* teleporter = new Teleporter(*iter.lisp());
 314         teleporters.push_back(teleporter);
 315         add_object(teleporter);
 316       } else if(iter.item() == "decal") {
 317         Decal* decal = new Decal(*iter.lisp());
 318         add_object(decal);
 319       } else if(iter.item() == "ambient-light") {
 320         std::vector<float> vColor;
 321         sector->get( "ambient-light", vColor );
 322         if(vColor.size() < 3) {
 323           log_warning << "(ambient-light) requires a color as argument" << std::endl;
 324         } else {
 325           ambient_light = Color( vColor );
 326         }
 327       } else if(iter.item() == "name") {
 328         // skip
 329       } else {
 330         log_warning << "Unknown token '" << iter.item() << "' in worldmap" << std::endl;
 331       }
 332     }
 333     current_tileset = NULL;
 334
 335     if(solid_tilemaps.size() == 0)
 336       throw std::runtime_error("No solid tilemap specified");
 337
 338     move_to_spawnpoint("main");
 339
 340   } catch(std::exception& e) {
 341     std::stringstream msg;
 342     msg << "Problem when parsing worldmap '" << map_filename << "': " <<
 343       e.what();
 344     throw std::runtime_error(msg.str());
 345   }
 346 }
 347
 348 void
 349 WorldMap::get_level_title(LevelTile& level)
 350 {
 351   /** get special_tile's title */
 352   level.title = "<no title>";
 353
 354   try {
 355     lisp::Parser parser;
 356     const lisp::Lisp* root = parser.parse(levels_path + level.get_name());
 357
 358     const lisp::Lisp* level_lisp = root->get_lisp("supertux-level");
 359     if(!level_lisp)
 360       return;
 361
 362     level_lisp->get("name", level.title);
 363   } catch(std::exception& e) {
 364     log_warning << "Problem when reading leveltitle: " << e.what() << std::endl;
 365     return;
 366   }
 367 }
 368
 369 void
 370 WorldMap::get_level_target_time(LevelTile& level)
 371 {
 372   if(last_position == tux->get_tile_pos()) {
 373     level.target_time = last_target_time;
 374     return;
 375   }
 376
 377   try {
 378     lisp::Parser parser;
 379     const lisp::Lisp* root = parser.parse(levels_path + level.get_name());
 380
 381     const lisp::Lisp* level_lisp = root->get_lisp("supertux-level");
 382     if(!level_lisp)
 383       return;
 384
 385     level_lisp->get("target-time", level.target_time);
 386
 387     last_position = level.pos;
 388     last_target_time = level.target_time;
 389
 390   } catch(std::exception& e) {
 391     log_warning << "Problem when reading level target time: " << e.what() << std::endl;
 392     return;
 393   }
 394 }
 395
 396 void WorldMap::calculate_total_stats()
 397 {
 398   total_stats.zero();
 399   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 400     LevelTile* level = *i;
 401     if (level->solved) {
 402       total_stats += level->statistics;
 403     }
 404   }
 405 }
 406
 407 void
 408 WorldMap::on_escape_press()
 409 {
 410   // Show or hide the menu
 411   if(!MenuManager::instance().is_active()) {
 412     MenuManager::instance().set_menu(MenuStorage::WORLDMAP_MENU);
 413     tux->set_direction(D_NONE);  // stop tux movement when menu is called
 414   } else {
 415     MenuManager::instance().clear_menu_stack();
 416   }
 417 }
 418
 419 Vector
 420 WorldMap::get_next_tile(Vector pos, Direction direction)
 421 {
 422   switch(direction) {
 423     case D_WEST:
 424       pos.x -= 1;
 425       break;
 426     case D_EAST:
 427       pos.x += 1;
 428       break;
 429     case D_NORTH:
 430       pos.y -= 1;
 431       break;
 432     case D_SOUTH:
 433       pos.y += 1;
 434       break;
 435     case D_NONE:
 436       break;
 437   }
 438   return pos;
 439 }
 440
 441 bool
 442 WorldMap::path_ok(Direction direction, const Vector& old_pos, Vector* new_pos)
 443 {
 444   *new_pos = get_next_tile(old_pos, direction);
 445
 446   if (!(new_pos->x >= 0 && new_pos->x < get_width()
 447         && new_pos->y >= 0 && new_pos->y < get_height()))
 448   { // New position is outsite the tilemap
 449     return false;
 450   }
 451   else
 452   { // Check if the tile allows us to go to new_pos
 453     int old_tile_data = tile_data_at(old_pos);
 454     int new_tile_data = tile_data_at(*new_pos);
 455     switch(direction)
 456     {
 457       case D_WEST:
 458         return (old_tile_data & Tile::WORLDMAP_WEST
 459                 && new_tile_data & Tile::WORLDMAP_EAST);
 460
 461       case D_EAST:
 462         return (old_tile_data & Tile::WORLDMAP_EAST
 463                 && new_tile_data & Tile::WORLDMAP_WEST);
 464
 465       case D_NORTH:
 466         return (old_tile_data & Tile::WORLDMAP_NORTH
 467                 && new_tile_data & Tile::WORLDMAP_SOUTH);
 468
 469       case D_SOUTH:
 470         return (old_tile_data & Tile::WORLDMAP_SOUTH
 471                 && new_tile_data & Tile::WORLDMAP_NORTH);
 472
 473       case D_NONE:
 474         assert(!"path_ok() can't walk if direction is NONE");
 475     }
 476     return false;
 477   }
 478 }
 479
 480 void
 481 WorldMap::finished_level(Level* gamelevel)
 482 {
 483   // TODO use Level* parameter here?
 484   LevelTile* level = at_level();
 485
 486   bool old_level_state = level->solved;
 487   level->solved = true;
 488   level->sprite->set_action("solved");
 489
 490   // deal with statistics
 491   level->statistics.merge(gamelevel->stats);
 492   calculate_total_stats();
 493   get_level_target_time(*level);
 494   if(level->statistics.completed(level->statistics, level->target_time)) {
 495     level->perfect = true;
 496     if(level->sprite->has_action("perfect"))
 497       level->sprite->set_action("perfect");
 498   }
 499
 500   save_state();
 501
 502   if (old_level_state != level->solved) {
 503     // Try to detect the next direction to which we should walk
 504     // FIXME: Mostly a hack
 505     Direction dir = D_NONE;
 506
 507     int dirdata = available_directions_at(tux->get_tile_pos());
 508     // first, test for crossroads
 509     if (dirdata == Tile::WORLDMAP_CNSE ||
 510         dirdata == Tile::WORLDMAP_CNSW ||
 511         dirdata == Tile::WORLDMAP_CNEW ||
 512         dirdata == Tile::WORLDMAP_CSEW ||
 513         dirdata == Tile::WORLDMAP_CNSEW)
 514       dir = D_NONE;
 515     else if (dirdata & Tile::WORLDMAP_NORTH
 516              && tux->back_direction != D_NORTH)
 517       dir = D_NORTH;
 518     else if (dirdata & Tile::WORLDMAP_SOUTH
 519              && tux->back_direction != D_SOUTH)
 520       dir = D_SOUTH;
 521     else if (dirdata & Tile::WORLDMAP_EAST
 522              && tux->back_direction != D_EAST)
 523       dir = D_EAST;
 524     else if (dirdata & Tile::WORLDMAP_WEST
 525              && tux->back_direction != D_WEST)
 526       dir = D_WEST;
 527
 528     if (dir != D_NONE) {
 529       tux->set_direction(dir);
 530     }
 531   }
 532
 533   if (level->extro_script != "") {
 534     try {
 535       std::istringstream in(level->extro_script);
 536       run_script(in, "worldmap:extro_script");
 537     } catch(std::exception& e) {
 538       log_warning << "Couldn't run level-extro-script: " << e.what() << std::endl;
 539     }
 540   }
 541 }
 542
 543 Vector
 544 WorldMap::get_camera_pos_for_tux() {
 545   Vector camera_offset_;
 546   Vector tux_pos = tux->get_pos();
 547   camera_offset_.x = tux_pos.x - SCREEN_WIDTH/2;
 548   camera_offset_.y = tux_pos.y - SCREEN_HEIGHT/2;
 549   return camera_offset_;
 550 }
 551
 552 void
 553 WorldMap::clamp_camera_position(Vector& c) {
 554   if (c.x < 0)
 555     c.x = 0;
 556   if (c.y < 0)
 557     c.y = 0;
 558
 559   if (c.x > (int)get_width()*32 - SCREEN_WIDTH)
 560     c.x = (int)get_width()*32 - SCREEN_WIDTH;
 561   if (c.y > (int)get_height()*32 - SCREEN_HEIGHT)
 562     c.y = (int)get_height()*32 - SCREEN_HEIGHT;
 563
 564   if (int(get_width()*32) < SCREEN_WIDTH)
 565     c.x = get_width()*16.0 - SCREEN_WIDTH/2.0;
 566   if (int(get_height()*32) < SCREEN_HEIGHT)
 567     c.y = get_height()*16.0 - SCREEN_HEIGHT/2.0;
 568 }
 569
 570 void
 571 WorldMap::update(float delta)
 572 {
 573   if (!in_level && !MenuManager::instance().is_active())
 574   {
 575     // update GameObjects
 576     for(size_t i = 0; i < game_objects.size(); ++i) {
 577       GameObject* object = game_objects[i];
 578       if(!panning || object != tux) {
 579         object->update(delta);
 580       }
 581     }
 582
 583     // remove old GameObjects
 584     for(GameObjects::iterator i = game_objects.begin();
 585         i != game_objects.end(); ) {
 586       GameObject* object = *i;
 587       if(!object->is_valid()) {
 588         try_unexpose(object);
 589         object->unref();
 590         i = game_objects.erase(i);
 591       } else {
 592         ++i;
 593       }
 594     }
 595
 596     /* update solid_tilemaps list */
 597     //FIXME: this could be more efficient
 598     solid_tilemaps.clear();
 599     for(std::vector<GameObject*>::iterator i = game_objects.begin();
 600         i != game_objects.end(); ++i)
 601     {
 602       TileMap* tm = dynamic_cast<TileMap*>(*i);
 603       if (!tm) continue;
 604       if (tm->is_solid()) solid_tilemaps.push_back(tm);
 605     }
 606
 607     Vector requested_pos;
 608
 609     // position "camera"
 610     if(!panning) {
 611       camera_offset = get_camera_pos_for_tux();
 612     } else {
 613       Vector delta__ = pan_pos - camera_offset;
 614       float mag = delta__.norm();
 615       if(mag > CAMERA_PAN_SPEED) {
 616         delta__ *= CAMERA_PAN_SPEED/mag;
 617       }
 618       camera_offset += delta__;
 619       if(camera_offset == pan_pos) {
 620         panning = false;
 621       }
 622     }
 623
 624     requested_pos = camera_offset;
 625     clamp_camera_position(camera_offset);
 626
 627     if(panning) {
 628       if(requested_pos.x != camera_offset.x) {
 629         pan_pos.x = camera_offset.x;
 630       }
 631       if(requested_pos.y != camera_offset.y) {
 632         pan_pos.y = camera_offset.y;
 633       }
 634     }
 635
 636     // handle input
 637     Controller *controller = InputManager::current()->get_controller();
 638     bool enter_level = false;
 639     if(controller->pressed(Controller::ACTION)
 640        || controller->pressed(Controller::JUMP)
 641        || controller->pressed(Controller::MENU_SELECT)) {
 642       /* some people define UP and JUMP on the same key... */
 643       if(!controller->pressed(Controller::UP))
 644         enter_level = true;
 645     }
 646     if(controller->pressed(Controller::PAUSE_MENU))
 647     {
 648       on_escape_press();
 649     }
 650
 651     if(controller->pressed(Controller::CHEAT_MENU) &&
 652        g_config->developer_mode)
 653     {
 654       MenuManager::instance().set_menu(MenuStorage::WORLDMAP_CHEAT_MENU);
 655     }
 656
 657     // check for teleporters
 658     Teleporter* teleporter = at_teleporter(tux->get_tile_pos());
 659     if (teleporter && (teleporter->automatic || (enter_level && (!tux->is_moving())))) {
 660       enter_level = false;
 661       if (teleporter->worldmap != "") {
 662         change(teleporter->worldmap, teleporter->spawnpoint);
 663       } else {
 664         // TODO: an animation, camera scrolling or a fading would be a nice touch
 665         SoundManager::current()->play("sounds/warp.wav");
 666         tux->back_direction = D_NONE;
 667         move_to_spawnpoint(teleporter->spawnpoint, true);
 668       }
 669     }
 670
 671     // check for auto-play levels
 672     LevelTile* level = at_level();
 673     if (level && (level->auto_play) && (!level->solved) && (!tux->is_moving())) {
 674       enter_level = true;
 675       // automatically mark these levels as solved in case player aborts
 676       level->solved = true;
 677     }
 678
 679     if (enter_level && !tux->is_moving())
 680     {
 681       /* Check level action */
 682       LevelTile* level_ = at_level();
 683       if (!level_) {
 684         //Respawn if player on a tile with no level and nowhere to go.
 685         int tile_data = tile_data_at(tux->get_tile_pos());
 686         if(!( tile_data & ( Tile::WORLDMAP_NORTH |  Tile::WORLDMAP_SOUTH | Tile::WORLDMAP_WEST | Tile::WORLDMAP_EAST ))){
 687           log_warning << "Player at illegal position " << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << " respawning." << std::endl;
 688           move_to_spawnpoint("main");
 689           return;
 690         }
 691         log_warning << "No level to enter at: " << tux->get_tile_pos().x << ", " << tux->get_tile_pos().y << std::endl;
 692         return;
 693       }
 694
 695       if (level_->pos == tux->get_tile_pos()) {
 696         try {
 697           Vector shrinkpos = Vector(level_->pos.x*32 + 16 - camera_offset.x,
 698                                     level_->pos.y*32 +  8 - camera_offset.y);
 699           std::string levelfile = levels_path + level_->get_name();
 700
 701           // update state and savegame
 702           save_state();
 703
 704           ScreenManager::current()->push_screen(std::unique_ptr<Screen>(new GameSession(levelfile, m_savegame, &level_->statistics)),
 705                                         std::unique_ptr<ScreenFade>(new ShrinkFade(shrinkpos, 1.0f)));
 706           in_level = true;
 707         } catch(std::exception& e) {
 708           log_fatal << "Couldn't load level: " << e.what() << std::endl;
 709         }
 710       }
 711     }
 712     else
 713     {
 714       //      tux->set_direction(input_direction);
 715     }
 716   }
 717 }
 718
 719 int
 720 WorldMap::tile_data_at(Vector p)
 721 {
 722   int dirs = 0;
 723
 724   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
 725     TileMap* tilemap = *i;
 726     const Tile* tile = tilemap->get_tile((int)p.x, (int)p.y);
 727     int dirdata = tile->getData();
 728     dirs |= dirdata;
 729   }
 730
 731   return dirs;
 732 }
 733
 734 int
 735 WorldMap::available_directions_at(Vector p)
 736 {
 737   return tile_data_at(p) & Tile::WORLDMAP_DIR_MASK;
 738 }
 739
 740 LevelTile*
 741 WorldMap::at_level()
 742 {
 743   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 744     LevelTile* level = *i;
 745     if (level->pos == tux->get_tile_pos())
 746       return level;
 747   }
 748
 749   return NULL;
 750 }
 751
 752 SpecialTile*
 753 WorldMap::at_special_tile()
 754 {
 755   for(SpecialTiles::iterator i = special_tiles.begin();
 756       i != special_tiles.end(); ++i) {
 757     SpecialTile* special_tile = *i;
 758     if (special_tile->pos == tux->get_tile_pos())
 759       return special_tile;
 760   }
 761
 762   return NULL;
 763 }
 764
 765 SpriteChange*
 766 WorldMap::at_sprite_change(const Vector& pos)
 767 {
 768   for(SpriteChanges::iterator i = sprite_changes.begin();
 769       i != sprite_changes.end(); ++i) {
 770     SpriteChange* sprite_change = *i;
 771     if(sprite_change->pos == pos)
 772       return sprite_change;
 773   }
 774
 775   return NULL;
 776 }
 777
 778 Teleporter*
 779 WorldMap::at_teleporter(const Vector& pos)
 780 {
 781   for(std::vector<Teleporter*>::iterator i = teleporters.begin(); i != teleporters.end(); ++i) {
 782     Teleporter* teleporter = *i;
 783     if(teleporter->pos == pos) return teleporter;
 784   }
 785
 786   return NULL;
 787 }
 788
 789 void
 790 WorldMap::draw(DrawingContext& context)
 791 {
 792   if (int(get_width()*32) < SCREEN_WIDTH || int(get_height()*32) < SCREEN_HEIGHT)
 793     context.draw_filled_rect(Vector(0, 0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 794                              Color(0.0f, 0.0f, 0.0f, 1.0f), LAYER_BACKGROUND0);
 795
 796   context.set_ambient_color( ambient_light );
 797   context.push_transform();
 798   context.set_translation(camera_offset);
 799
 800   for(GameObjects::iterator i = game_objects.begin();
 801       i != game_objects.end(); ++i) {
 802     GameObject* object = *i;
 803     if(!panning || object != tux) {
 804       object->draw(context);
 805     }
 806   }
 807
 808   /*
 809   // FIXME: make this a runtime switch similar to draw_collrects/show_collrects?
 810   // draw visual indication of possible walk directions
 811   static int flipme = 0;
 812   if (flipme++ & 0x04)
 813   for (int x = 0; x < get_width(); x++) {
 814   for (int y = 0; y < get_height(); y++) {
 815   int data = tile_data_at(Vector(x,y));
 816   int px = x * 32;
 817   int py = y * 32;
 818   const int W = 4;
 819   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);
 820   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);
 821   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);
 822   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);
 823   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);
 824   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);
 825   }
 826   }
 827   */
 828
 829   draw_status(context);
 830   context.pop_transform();
 831 }
 832
 833 void
 834 WorldMap::draw_status(DrawingContext& context)
 835 {
 836   context.push_transform();
 837   context.set_translation(Vector(0, 0));
 838
 839   m_savegame.get_player_status()->draw(context);
 840
 841   if (!tux->is_moving()) {
 842     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
 843       LevelTile* level = *i;
 844
 845       if (level->pos == tux->get_tile_pos()) {
 846         if(level->title == "")
 847           get_level_title(*level);
 848
 849         context.draw_text(Resources::normal_font, level->title,
 850                           Vector(SCREEN_WIDTH/2,
 851                                  SCREEN_HEIGHT - Resources::normal_font->get_height() - 10),
 852                           ALIGN_CENTER, LAYER_HUD, WorldMap::level_title_color);
 853
 854         // if level is solved, draw level picture behind stats
 855         /*
 856           if (level->solved) {
 857           if (const Surface* picture = level->get_picture()) {
 858           Vector pos = Vector(SCREEN_WIDTH - picture->get_width(), SCREEN_HEIGHT - picture->get_height());
 859           context.push_transform();
 860           context.set_alpha(0.5);
 861           context.draw_surface(picture, pos, LAYER_FOREGROUND1-1);
 862           context.pop_transform();
 863           }
 864           }
 865         */
 866
 867         if (level->target_time == 0.0f)
 868           get_level_target_time(*level);
 869         level->statistics.draw_worldmap_info(context, level->target_time);
 870         break;
 871       }
 872     }
 873
 874     for(SpecialTiles::iterator i = special_tiles.begin();
 875         i != special_tiles.end(); ++i) {
 876       SpecialTile* special_tile = *i;
 877
 878       if (special_tile->pos == tux->get_tile_pos()) {
 879         /* Display an in-map message in the map, if any as been selected */
 880         if(!special_tile->map_message.empty() && !special_tile->passive_message)
 881           context.draw_text(Resources::normal_font, special_tile->map_message,
 882                             Vector(SCREEN_WIDTH/2,
 883                                    SCREEN_HEIGHT - Resources::normal_font->get_height() - 60),
 884                             ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::message_color);
 885         break;
 886       }
 887     }
 888
 889     // display teleporter messages
 890     Teleporter* teleporter = at_teleporter(tux->get_tile_pos());
 891     if (teleporter && (teleporter->message != "")) {
 892       Vector pos = Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT - Resources::normal_font->get_height() - 30);
 893       context.draw_text(Resources::normal_font, teleporter->message, pos, ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::teleporter_message_color);
 894     }
 895
 896   }
 897
 898   /* Display a passive message in the map, if needed */
 899   if(passive_message_timer.started())
 900     context.draw_text(Resources::normal_font, passive_message,
 901                       Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT - Resources::normal_font->get_height() - 60),
 902                       ALIGN_CENTER, LAYER_FOREGROUND1, WorldMap::message_color);
 903
 904   context.pop_transform();
 905 }
 906
 907 void
 908 WorldMap::setup()
 909 {
 910   SoundManager::current()->play_music(music);
 911   MenuManager::instance().clear_menu_stack();
 912
 913   current_ = this;
 914   load_state();
 915
 916   // if force_spawnpoint was set, move Tux there, then clear force_spawnpoint
 917   if (force_spawnpoint != "") {
 918     move_to_spawnpoint(force_spawnpoint);
 919     force_spawnpoint = "";
 920   }
 921
 922   tux->setup();
 923
 924   // register worldmap_table as worldmap in scripting
 925   using namespace scripting;
 926
 927   sq_pushroottable(global_vm);
 928   sq_pushstring(global_vm, "worldmap", -1);
 929   sq_pushobject(global_vm, worldmap_table);
 930   if(SQ_FAILED(sq_newslot(global_vm, -3, SQFalse)))
 931     throw SquirrelError(global_vm, "Couldn't set worldmap in roottable");
 932   sq_pop(global_vm, 1);
 933
 934   //Run default.nut just before init script
 935   try {
 936     IFileStreambuf ins(levels_path + "default.nut");
 937     std::istream in(&ins);
 938     run_script(in, "WorldMap::default.nut");
 939   } catch(std::exception& ) {
 940     // doesn't exist or erroneous; do nothing
 941   }
 942
 943   if(init_script != "") {
 944     std::istringstream in(init_script);
 945     run_script(in, "WorldMap::init");
 946   }
 947 }
 948
 949 void
 950 WorldMap::leave()
 951 {
 952   using namespace scripting;
 953
 954   // save state of world and player
 955   save_state();
 956
 957   // remove worldmap_table from roottable
 958   sq_pushroottable(global_vm);
 959   sq_pushstring(global_vm, "worldmap", -1);
 960   if(SQ_FAILED(sq_deleteslot(global_vm, -2, SQFalse)))
 961     throw SquirrelError(global_vm, "Couldn't unset worldmap in roottable");
 962   sq_pop(global_vm, 1);
 963 }
 964
 965 void
 966 WorldMap::set_levels_solved(bool solved, bool perfect)
 967 {
 968   for(auto& level : levels)
 969   {
 970     level->set_solved(solved);
 971     level->set_perfect(perfect);
 972   }
 973 }
 974
 975 void
 976 WorldMap::save_state()
 977 {
 978   using namespace scripting;
 979
 980   HSQUIRRELVM vm = global_vm;
 981   int oldtop = sq_gettop(vm);
 982
 983   try {
 984     // get state table
 985     sq_pushroottable(vm);
 986     sq_pushstring(vm, "state", -1);
 987     if(SQ_FAILED(sq_get(vm, -2)))
 988       throw scripting::SquirrelError(vm, "Couldn't get state table");
 989
 990     // get or create worlds table
 991     sq_pushstring(vm, "worlds", -1);
 992     if(SQ_FAILED(sq_get(vm, -2))) {
 993       sq_pushstring(vm, "worlds", -1);
 994       sq_newtable(vm);
 995       if(SQ_FAILED(sq_newslot(vm, -3, SQFalse)))
 996         throw scripting::SquirrelError(vm, "Couldn't create state.worlds");
 997
 998       sq_pushstring(vm, "worlds", -1);
 999       if(SQ_FAILED(sq_get(vm, -2)))
1000         throw scripting::SquirrelError(vm, "Couldn't create.get state.worlds");
1001     }
1002
1003     sq_pushstring(vm, map_filename.c_str(), map_filename.length());
1004     if(SQ_FAILED(sq_deleteslot(vm, -2, SQFalse)))
1005     {
1006     }
1007
1008     // construct new table for this worldmap
1009     sq_pushstring(vm, map_filename.c_str(), map_filename.length());
1010     sq_newtable(vm);
1011
1012     // store tux
1013     sq_pushstring(vm, "tux", -1);
1014     sq_newtable(vm);
1015
1016     store_float(vm, "x", tux->get_tile_pos().x);
1017     store_float(vm, "y", tux->get_tile_pos().y);
1018     store_string(vm, "back", direction_to_string(tux->back_direction));
1019
1020     sq_newslot(vm, -3, SQFalse);
1021
1022     // levels...
1023     sq_pushstring(vm, "levels", -1);
1024     sq_newtable(vm);
1025
1026     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
1027       LevelTile* level = *i;
1028
1029       sq_pushstring(vm, level->get_name().c_str(), -1);
1030       sq_newtable(vm);
1031
1032       store_bool(vm, "solved", level->solved);
1033       store_bool(vm, "perfect", level->perfect);
1034       level->statistics.serialize_to_squirrel(vm);
1035
1036       sq_newslot(vm, -3, SQFalse);
1037     }
1038
1039     sq_newslot(vm, -3, SQFalse);
1040
1041     // overall statistics...
1042     total_stats.serialize_to_squirrel(vm);
1043
1044     // push world into worlds table
1045     sq_newslot(vm, -3, SQFalse);
1046   } catch(std::exception& ) {
1047     sq_settop(vm, oldtop);
1048   }
1049
1050   sq_settop(vm, oldtop);
1051
1052   m_savegame.save();
1053 }
1054
1055 void
1056 WorldMap::load_state()
1057 {
1058   using namespace scripting;
1059
1060   HSQUIRRELVM vm = global_vm;
1061   int oldtop = sq_gettop(vm);
1062
1063   try {
1064     // get state table
1065     sq_pushroottable(vm);
1066     sq_pushstring(vm, "state", -1);
1067     if(SQ_FAILED(sq_get(vm, -2)))
1068       throw scripting::SquirrelError(vm, "Couldn't get state table");
1069
1070     // get worlds table
1071     sq_pushstring(vm, "worlds", -1);
1072     if(SQ_FAILED(sq_get(vm, -2)))
1073       throw scripting::SquirrelError(vm, "Couldn't get state.worlds");
1074
1075     // get table for our world
1076     sq_pushstring(vm, map_filename.c_str(), map_filename.length());
1077     if(SQ_FAILED(sq_get(vm, -2)))
1078       throw scripting::SquirrelError(vm, "Couldn't get state.worlds.mapfilename");
1079
1080     // load tux
1081     sq_pushstring(vm, "tux", -1);
1082     if(SQ_FAILED(sq_get(vm, -2)))
1083       throw scripting::SquirrelError(vm, "Couldn't get tux");
1084
1085     Vector p;
1086     p.x = read_float(vm, "x");
1087     p.y = read_float(vm, "y");
1088     std::string back_str = read_string(vm, "back");
1089     tux->back_direction = string_to_direction(back_str);
1090     tux->set_tile_pos(p);
1091
1092     sq_pop(vm, 1);
1093
1094     // load levels
1095     sq_pushstring(vm, "levels", -1);
1096     if(SQ_FAILED(sq_get(vm, -2)))
1097       throw scripting::SquirrelError(vm, "Couldn't get levels");
1098
1099     for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
1100       LevelTile* level = *i;
1101       sq_pushstring(vm, level->get_name().c_str(), -1);
1102       if(SQ_SUCCEEDED(sq_get(vm, -2))) {
1103         level->solved = read_bool(vm, "solved");
1104         level->perfect = read_bool(vm, "perfect");
1105         if(!level->solved)
1106           level->sprite->set_action("default");
1107         else
1108           level->sprite->set_action((level->sprite->has_action("perfect") && level->perfect) ? "perfect" : "solved");
1109         level->statistics.unserialize_from_squirrel(vm);
1110         sq_pop(vm, 1);
1111       }
1112     }
1113
1114     // leave state table
1115     sq_pop(vm, 1);
1116
1117     // load overall statistics
1118     total_stats.unserialize_from_squirrel(vm);
1119
1120   } catch(std::exception& e) {
1121     log_debug << "Not loading worldmap state: " << e.what() << std::endl;
1122   }
1123   sq_settop(vm, oldtop);
1124
1125   in_level = false;
1126 }
1127
1128 size_t
1129 WorldMap::level_count()
1130 {
1131   return levels.size();
1132 }
1133
1134 size_t
1135 WorldMap::solved_level_count()
1136 {
1137   size_t count = 0;
1138   for(LevelTiles::iterator i = levels.begin(); i != levels.end(); ++i) {
1139     LevelTile* level = *i;
1140
1141     if(level->solved)
1142       count++;
1143   }
1144
1145   return count;
1146 }
1147
1148 HSQUIRRELVM
1149 WorldMap::run_script(std::istream& in, const std::string& sourcename)
1150 {
1151   using namespace scripting;
1152
1153   // garbage collect thread list
1154   for(ScriptList::iterator i = scripts.begin();
1155       i != scripts.end(); ) {
1156     HSQOBJECT& object = *i;
1157     HSQUIRRELVM vm = object_to_vm(object);
1158
1159     if(sq_getvmstate(vm) != SQ_VMSTATE_SUSPENDED) {
1160       sq_release(global_vm, &object);
1161       i = scripts.erase(i);
1162       continue;
1163     }
1164
1165     ++i;
1166   }
1167
1168   HSQOBJECT object = create_thread(global_vm);
1169   scripts.push_back(object);
1170
1171   HSQUIRRELVM vm = object_to_vm(object);
1172
1173   // set worldmap_table as roottable for the thread
1174   sq_pushobject(vm, worldmap_table);
1175   sq_setroottable(vm);
1176
1177   compile_and_run(vm, in, sourcename);
1178
1179   return vm;
1180 }
1181
1182 float
1183 WorldMap::get_width() const
1184 {
1185   float width = 0;
1186   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
1187     TileMap* solids = *i;
1188     if (solids->get_width() > width) width = solids->get_width();
1189   }
1190   return width;
1191 }
1192
1193 float
1194 WorldMap::get_height() const
1195 {
1196   float height = 0;
1197   for(std::list<TileMap*>::const_iterator i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
1198     TileMap* solids = *i;
1199     if (solids->get_height() > height) height = solids->get_height();
1200   }
1201   return height;
1202 }
1203
1204 } // namespace worldmap
1205
1206 /* EOF */