src/game_session.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19 #include <config.h>
  20
  21 #include <fstream>
  22 #include <sstream>
  23 #include <cassert>
  24 #include <cstdio>
  25 #include <cstdlib>
  26 #include <cmath>
  27 #include <cstring>
  28 #include <cerrno>
  29 #include <unistd.h>
  30 #include <ctime>
  31 #include <stdexcept>
  32
  33 #include <SDL.h>
  34
  35 #include "game_session.hpp"
  36 #include "log.hpp"
  37 #include "worldmap/worldmap.hpp"
  38 #include "mainloop.hpp"
  39 #include "video/screen.hpp"
  40 #include "audio/sound_manager.hpp"
  41 #include "gui/menu.hpp"
  42 #include "sector.hpp"
  43 #include "level.hpp"
  44 #include "tile.hpp"
  45 #include "player_status.hpp"
  46 #include "object/particlesystem.hpp"
  47 #include "object/background.hpp"
  48 #include "object/gradient.hpp"
  49 #include "object/tilemap.hpp"
  50 #include "object/camera.hpp"
  51 #include "object/player.hpp"
  52 #include "object/level_time.hpp"
  53 #include "lisp/lisp.hpp"
  54 #include "lisp/parser.hpp"
  55 #include "resources.hpp"
  56 #include "statistics.hpp"
  57 #include "timer.hpp"
  58 #include "options_menu.hpp"
  59 #include "object/fireworks.hpp"
  60 #include "textscroller.hpp"
  61 #include "control/codecontroller.hpp"
  62 #include "control/joystickkeyboardcontroller.hpp"
  63 #include "main.hpp"
  64 #include "file_system.hpp"
  65 #include "gameconfig.hpp"
  66 #include "gettext.hpp"
  67 #include "console.hpp"
  68 #include "flip_level_transformer.hpp"
  69
  70 // the engine will be run with a logical framerate of 64fps.
  71 // We chose 64fps here because it is a power of 2, so 1/64 gives an "even"
  72 // binary fraction...
  73 static const float LOGICAL_FPS = 64.0;
  74
  75 enum GameMenuIDs {
  76   MNID_CONTINUE,
  77   MNID_ABORTLEVEL
  78 };
  79
  80 GameSession* GameSession::current_ = NULL;
  81
  82 GameSession::GameSession(const std::string& levelfile_, Statistics* statistics)
  83   : level(0), currentsector(0),
  84     end_sequence(NO_ENDSEQUENCE), end_sequence_controller(0),
  85     levelfile(levelfile_), best_level_statistics(statistics),
  86     capture_demo_stream(0), playback_demo_stream(0), demo_controller(0),
  87     play_time(0)
  88 {
  89   current_ = this;
  90   currentsector = NULL;
  91
  92   game_pause = false;
  93
  94   statistics_backdrop.reset(new Surface("images/engine/menu/score-backdrop.png"));
  95
  96   restart_level(true);
  97
  98   game_menu.reset(new Menu());
  99   game_menu->add_label(_("Pause"));
 100   game_menu->add_hl();
 101   game_menu->add_entry(MNID_CONTINUE, _("Continue"));
 102   game_menu->add_submenu(_("Options"), get_options_menu());
 103   game_menu->add_hl();
 104   game_menu->add_entry(MNID_ABORTLEVEL, _("Abort Level"));
 105 }
 106
 107 void
 108 GameSession::restart_level(bool fromBeginning)
 109 {
 110   game_pause   = false;
 111   end_sequence = NO_ENDSEQUENCE;
 112
 113   main_controller->reset();
 114
 115   currentsector = 0;
 116
 117   level.reset(new Level);
 118   level->load(levelfile);
 119   level->stats.total_coins = level->get_total_coins();
 120   level->stats.total_badguys = level->get_total_badguys();
 121   level->stats.reset();
 122
 123   if (fromBeginning) reset_sector="";
 124   if(reset_sector != "") {
 125     currentsector = level->get_sector(reset_sector);
 126     if(!currentsector) {
 127       std::stringstream msg;
 128       msg << "Couldn't find sector '" << reset_sector << "' for resetting tux.";
 129       throw std::runtime_error(msg.str());
 130     }
 131     currentsector->activate(reset_pos);
 132   } else {
 133     currentsector = level->get_sector("main");
 134     if(!currentsector)
 135       throw std::runtime_error("Couldn't find main sector");
 136     currentsector->activate("main");
 137   }
 138
 139   levelintro();
 140
 141   currentsector->play_music(LEVEL_MUSIC);
 142
 143   if(capture_file != "")
 144     record_demo(capture_file);
 145 }
 146
 147 GameSession::~GameSession()
 148 {
 149   delete capture_demo_stream;
 150   delete playback_demo_stream;
 151   delete demo_controller;
 152
 153   delete end_sequence_controller;
 154
 155   current_ = NULL;
 156 }
 157
 158 void
 159 GameSession::record_demo(const std::string& filename)
 160 {
 161   delete capture_demo_stream;
 162
 163   capture_demo_stream = new std::ofstream(filename.c_str());
 164   if(!capture_demo_stream->good()) {
 165     std::stringstream msg;
 166     msg << "Couldn't open demo file '" << filename << "' for writing.";
 167     throw std::runtime_error(msg.str());
 168   }
 169   capture_file = filename;
 170 }
 171
 172 void
 173 GameSession::play_demo(const std::string& filename)
 174 {
 175   delete playback_demo_stream;
 176   delete demo_controller;
 177
 178   playback_demo_stream = new std::ifstream(filename.c_str());
 179   if(!playback_demo_stream->good()) {
 180     std::stringstream msg;
 181     msg << "Couldn't open demo file '" << filename << "' for reading.";
 182     throw std::runtime_error(msg.str());
 183   }
 184
 185   Player& tux = *currentsector->player;
 186   demo_controller = new CodeController();
 187   tux.set_controller(demo_controller);
 188 }
 189
 190 void
 191 GameSession::levelintro()
 192 {
 193   char str[60];
 194
 195   sound_manager->stop_music();
 196
 197   DrawingContext context;
 198   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 199       i != currentsector->gameobjects.end(); ++i) {
 200     Background* background = dynamic_cast<Background*> (*i);
 201     if(background) {
 202       background->draw(context);
 203     }
 204     Gradient* gradient = dynamic_cast<Gradient*> (*i);
 205     if(gradient) {
 206       gradient->draw(context);
 207     }
 208   }
 209
 210 //  context.draw_text(gold_text, level->get_name(), Vector(SCREEN_WIDTH/2, 160),
 211 //      CENTER_ALLIGN, LAYER_FOREGROUND1);
 212   context.draw_center_text(gold_text, level->get_name(), Vector(0, 160),
 213       LAYER_FOREGROUND1);
 214
 215   sprintf(str, "Coins: %d", player_status->coins);
 216   context.draw_text(white_text, str, Vector(SCREEN_WIDTH/2, 210),
 217       CENTER_ALLIGN, LAYER_FOREGROUND1);
 218
 219   if((level->get_author().size()) && (level->get_author() != "SuperTux Team"))
 220     context.draw_text(white_small_text,
 221       std::string(_("contributed by ")) + level->get_author(),
 222       Vector(SCREEN_WIDTH/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 223
 224   if(best_level_statistics != NULL)
 225     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 226
 227   wait_for_event(1.0, 3.0);
 228 }
 229
 230 void
 231 GameSession::on_escape_press()
 232 {
 233   if(currentsector->player->is_dying() || end_sequence != NO_ENDSEQUENCE)
 234     return;   // don't let the player open the menu, when he is dying
 235
 236   if (!Menu::current()) {
 237     Menu::set_current(game_menu.get());
 238     game_menu->set_active_item(MNID_CONTINUE);
 239     game_pause = true;
 240   } else {
 241     Menu::set_current(NULL);
 242     game_pause = false;
 243   }
 244 }
 245
 246 void
 247 GameSession::process_events()
 248 {
 249   Player& tux = *currentsector->player;
 250
 251   // end of pause mode?
 252   if(!Menu::current() && game_pause) {
 253     game_pause = false;
 254   }
 255
 256   if (end_sequence != NO_ENDSEQUENCE) {
 257     if(end_sequence_controller == 0) {
 258       end_sequence_controller = new CodeController();
 259       tux.set_controller(end_sequence_controller);
 260     }
 261
 262     end_sequence_controller->press(Controller::RIGHT);
 263
 264     if (int(last_x_pos) == int(tux.get_pos().x))
 265       end_sequence_controller->press(Controller::JUMP);
 266     last_x_pos = tux.get_pos().x;
 267   }
 268
 269   // playback a demo?
 270   if(playback_demo_stream != 0) {
 271     demo_controller->update();
 272     char left = false;
 273     char right = false;
 274     char up = false;
 275     char down = false;
 276     char jump = false;
 277     char action = false;
 278     playback_demo_stream->get(left);
 279     playback_demo_stream->get(right);
 280     playback_demo_stream->get(up);
 281     playback_demo_stream->get(down);
 282     playback_demo_stream->get(jump);
 283     playback_demo_stream->get(action);
 284     demo_controller->press(Controller::LEFT, left);
 285     demo_controller->press(Controller::RIGHT, right);
 286     demo_controller->press(Controller::UP, up);
 287     demo_controller->press(Controller::DOWN, down);
 288     demo_controller->press(Controller::JUMP, jump);
 289     demo_controller->press(Controller::ACTION, action);
 290   }
 291
 292   // save input for demo?
 293   if(capture_demo_stream != 0) {
 294     capture_demo_stream ->put(main_controller->hold(Controller::LEFT));
 295     capture_demo_stream ->put(main_controller->hold(Controller::RIGHT));
 296     capture_demo_stream ->put(main_controller->hold(Controller::UP));
 297     capture_demo_stream ->put(main_controller->hold(Controller::DOWN));
 298     capture_demo_stream ->put(main_controller->hold(Controller::JUMP));
 299     capture_demo_stream ->put(main_controller->hold(Controller::ACTION));
 300   }
 301 }
 302
 303 void
 304 GameSession::check_end_conditions()
 305 {
 306   Player* tux = currentsector->player;
 307
 308   /* End of level? */
 309   if(end_sequence && endsequence_timer.check()) {
 310     finish(true);
 311     return;
 312   } else if (!end_sequence && tux->is_dead()) {
 313     if (player_status->coins < 0) {
 314       // No more coins: restart level from beginning
 315       player_status->coins = 0;
 316       restart_level(true);
 317     } else {
 318       // Still has coins: restart level from last reset point
 319       restart_level(false);
 320     }
 321
 322     return;
 323   }
 324 }
 325
 326 void
 327 GameSession::draw(DrawingContext& context)
 328 {
 329   currentsector->draw(context);
 330   drawstatus(context);
 331
 332   if(game_pause)
 333     draw_pause(context);
 334 }
 335
 336 void
 337 GameSession::draw_pause(DrawingContext& context)
 338 {
 339   context.draw_filled_rect(
 340       Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 341       Color(.2, .2, .2, .5), LAYER_FOREGROUND1);
 342 }
 343
 344 void
 345 GameSession::process_menu()
 346 {
 347   Menu* menu = Menu::current();
 348   if(menu) {
 349     menu->update();
 350
 351     if(menu == game_menu.get()) {
 352       switch (game_menu->check()) {
 353         case MNID_CONTINUE:
 354           Menu::set_current(0);
 355           break;
 356         case MNID_ABORTLEVEL:
 357           Menu::set_current(0);
 358           main_loop->exit_screen();
 359           break;
 360       }
 361     }
 362   }
 363 }
 364
 365 void
 366 GameSession::setup()
 367 {
 368   Menu::set_current(NULL);
 369   current_ = this;
 370
 371   // Eat unneeded events
 372   SDL_Event event;
 373   while(SDL_PollEvent(&event))
 374   {}
 375 }
 376
 377 void
 378 GameSession::update(float elapsed_time)
 379 {
 380   process_events();
 381   process_menu();
 382
 383   check_end_conditions();
 384
 385   // handle controller
 386   if(main_controller->pressed(Controller::PAUSE_MENU))
 387     on_escape_press();
 388
 389   // respawning in new sector?
 390   if(newsector != "" && newspawnpoint != "") {
 391     Sector* sector = level->get_sector(newsector);
 392     if(sector == 0) {
 393       log_warning << "Sector '" << newsector << "' not found" << std::endl;
 394     }
 395     sector->activate(newspawnpoint);
 396     sector->play_music(LEVEL_MUSIC);
 397     currentsector = sector;
 398     newsector = "";
 399     newspawnpoint = "";
 400   }
 401
 402   // Update the world state and all objects in the world
 403   if(!game_pause) {
 404     // Update the world
 405     if (end_sequence == ENDSEQUENCE_RUNNING) {
 406       currentsector->update(elapsed_time/2);
 407     } else if(end_sequence == NO_ENDSEQUENCE) {
 408       if(!currentsector->player->growing_timer.started()) {
 409         play_time += elapsed_time; //TODO: make sure we don't count cutscene time
 410         level->stats.time = play_time;
 411         currentsector->update(elapsed_time);
 412       }
 413     }
 414   }
 415
 416   // update sounds
 417   sound_manager->set_listener_position(currentsector->player->get_pos());
 418
 419   /* Handle music: */
 420   if (end_sequence)
 421     return;
 422
 423   if(currentsector->player->invincible_timer.started()) {
 424     if(currentsector->player->invincible_timer.get_timeleft() <=
 425        TUX_INVINCIBLE_TIME_WARNING) {
 426       currentsector->play_music(HERRING_WARNING_MUSIC);
 427     } else {
 428       currentsector->play_music(HERRING_MUSIC);
 429     }
 430   } else if(currentsector->get_music_type() != LEVEL_MUSIC) {
 431     currentsector->play_music(LEVEL_MUSIC);
 432   }
 433 }
 434
 435 void
 436 GameSession::finish(bool win)
 437 {
 438   using namespace WorldMapNS;
 439
 440   if(win) {
 441     if(WorldMap::current())
 442       WorldMap::current()->finished_level(level.get());
 443   }
 444
 445   main_loop->exit_screen();
 446 }
 447
 448 void
 449 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 450 {
 451   newsector = sector;
 452   newspawnpoint = spawnpoint;
 453 }
 454
 455 void
 456 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 457 {
 458   reset_sector = sector;
 459   reset_pos = pos;
 460 }
 461
 462 std::string
 463 GameSession::get_working_directory()
 464 {
 465   return FileSystem::dirname(levelfile);
 466 }
 467
 468 void
 469 GameSession::display_info_box(const std::string& text)
 470 {
 471   InfoBox* box = new InfoBox(text);
 472
 473   bool running = true;
 474   DrawingContext context;
 475
 476   while(running)  {
 477
 478     // TODO make a screen out of this, another mainloop is ugly
 479     main_controller->update();
 480     SDL_Event event;
 481     while (SDL_PollEvent(&event)) {
 482       main_controller->process_event(event);
 483       if(event.type == SDL_QUIT)
 484         main_loop->quit();
 485     }
 486
 487     if(main_controller->pressed(Controller::JUMP)
 488         || main_controller->pressed(Controller::ACTION)
 489         || main_controller->pressed(Controller::PAUSE_MENU)
 490         || main_controller->pressed(Controller::MENU_SELECT))
 491       running = false;
 492     else if(main_controller->pressed(Controller::DOWN))
 493       box->scrolldown();
 494     else if(main_controller->pressed(Controller::UP))
 495       box->scrollup();
 496     box->draw(context);
 497     draw(context);
 498     context.do_drawing();
 499     sound_manager->update();
 500   }
 501
 502   delete box;
 503 }
 504
 505 void
 506 GameSession::start_sequence(const std::string& sequencename)
 507 {
 508   if(sequencename == "endsequence" || sequencename == "fireworks") {
 509     if(end_sequence)
 510       return;
 511
 512     end_sequence = ENDSEQUENCE_RUNNING;
 513     endsequence_timer.start(7.3);
 514     last_x_pos = -1;
 515     sound_manager->play_music("music/leveldone.ogg", false);
 516     currentsector->player->invincible_timer.start(7.3);
 517
 518     // Stop all clocks.
 519     for(std::vector<GameObject*>::iterator i = currentsector->gameobjects.begin();
 520         i != currentsector->gameobjects.end(); ++i)
 521     {
 522       GameObject* obj = *i;
 523
 524       LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 525       if(lt)
 526         lt->stop();
 527     }
 528
 529     if(sequencename == "fireworks") {
 530       currentsector->add_object(new Fireworks());
 531     }
 532   } else if(sequencename == "stoptux") {
 533     if(!end_sequence) {
 534       log_warning << "Final target reached without an active end sequence" << std::endl;
 535       this->start_sequence("endsequence");
 536     }
 537     end_sequence =  ENDSEQUENCE_WAITING;
 538   } else {
 539     log_warning << "Unknown sequence '" << sequencename << "'" << std::endl;
 540   }
 541 }
 542
 543 /* (Status): */
 544 void
 545 GameSession::drawstatus(DrawingContext& context)
 546 {
 547   player_status->draw(context);
 548
 549   // draw level stats while end_sequence is running
 550   if (end_sequence) {
 551     level->stats.draw_endseq_panel(context, best_level_statistics, statistics_backdrop.get());
 552   }
 553 }
 554