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 "audio/sound_manager.hpp"
  40 #include "gui/menu.hpp"
  41 #include "sector.hpp"
  42 #include "level.hpp"
  43 #include "tile.hpp"
  44 #include "player_status.hpp"
  45 #include "object/particlesystem.hpp"
  46 #include "object/background.hpp"
  47 #include "object/gradient.hpp"
  48 #include "object/tilemap.hpp"
  49 #include "object/camera.hpp"
  50 #include "object/player.hpp"
  51 #include "object/level_time.hpp"
  52 #include "lisp/lisp.hpp"
  53 #include "lisp/parser.hpp"
  54 #include "resources.hpp"
  55 #include "statistics.hpp"
  56 #include "timer.hpp"
  57 #include "options_menu.hpp"
  58 #include "object/fireworks.hpp"
  59 #include "textscroller.hpp"
  60 #include "control/codecontroller.hpp"
  61 #include "control/joystickkeyboardcontroller.hpp"
  62 #include "main.hpp"
  63 #include "file_system.hpp"
  64 #include "gameconfig.hpp"
  65 #include "gettext.hpp"
  66 #include "console.hpp"
  67 #include "flip_level_transformer.hpp"
  68 #include "trigger/secretarea_trigger.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.total_secrets = level->get_total_count<SecretAreaTrigger>();
 122   level->stats.reset();
 123
 124   if (fromBeginning) reset_sector="";
 125   if(reset_sector != "") {
 126     currentsector = level->get_sector(reset_sector);
 127     if(!currentsector) {
 128       std::stringstream msg;
 129       msg << "Couldn't find sector '" << reset_sector << "' for resetting tux.";
 130       throw std::runtime_error(msg.str());
 131     }
 132     currentsector->activate(reset_pos);
 133   } else {
 134     currentsector = level->get_sector("main");
 135     if(!currentsector)
 136       throw std::runtime_error("Couldn't find main sector");
 137     currentsector->activate("main");
 138   }
 139
 140   //levelintro();
 141
 142   currentsector->play_music(LEVEL_MUSIC);
 143
 144   if(capture_file != "")
 145     record_demo(capture_file);
 146 }
 147
 148 GameSession::~GameSession()
 149 {
 150   delete capture_demo_stream;
 151   delete playback_demo_stream;
 152   delete demo_controller;
 153
 154   delete end_sequence_controller;
 155
 156   current_ = NULL;
 157 }
 158
 159 void
 160 GameSession::record_demo(const std::string& filename)
 161 {
 162   delete capture_demo_stream;
 163
 164   capture_demo_stream = new std::ofstream(filename.c_str());
 165   if(!capture_demo_stream->good()) {
 166     std::stringstream msg;
 167     msg << "Couldn't open demo file '" << filename << "' for writing.";
 168     throw std::runtime_error(msg.str());
 169   }
 170   capture_file = filename;
 171 }
 172
 173 void
 174 GameSession::play_demo(const std::string& filename)
 175 {
 176   delete playback_demo_stream;
 177   delete demo_controller;
 178
 179   playback_demo_stream = new std::ifstream(filename.c_str());
 180   if(!playback_demo_stream->good()) {
 181     std::stringstream msg;
 182     msg << "Couldn't open demo file '" << filename << "' for reading.";
 183     throw std::runtime_error(msg.str());
 184   }
 185
 186   Player& tux = *currentsector->player;
 187   demo_controller = new CodeController();
 188   tux.set_controller(demo_controller);
 189 }
 190
 191 void
 192 GameSession::levelintro()
 193 {
 194   char str[60];
 195
 196   sound_manager->stop_music();
 197
 198   DrawingContext context;
 199   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 200       i != currentsector->gameobjects.end(); ++i) {
 201     Background* background = dynamic_cast<Background*> (*i);
 202     if(background) {
 203       background->draw(context);
 204     }
 205     Gradient* gradient = dynamic_cast<Gradient*> (*i);
 206     if(gradient) {
 207       gradient->draw(context);
 208     }
 209   }
 210
 211 //  context.draw_text(gold_text, level->get_name(), Vector(SCREEN_WIDTH/2, 160),
 212 //      CENTER_ALLIGN, LAYER_FOREGROUND1);
 213   context.draw_center_text(gold_text, level->get_name(), Vector(0, 160),
 214       LAYER_FOREGROUND1);
 215
 216   sprintf(str, "Coins: %d", player_status->coins);
 217   context.draw_text(white_text, str, Vector(SCREEN_WIDTH/2, 210),
 218       CENTER_ALLIGN, LAYER_FOREGROUND1);
 219
 220   if((level->get_author().size()) && (level->get_author() != "SuperTux Team"))
 221     context.draw_text(white_small_text,
 222       std::string(_("contributed by ")) + level->get_author(),
 223       Vector(SCREEN_WIDTH/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 224
 225   if(best_level_statistics != NULL)
 226     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 227
 228   wait_for_event(1.0, 3.0);
 229 }
 230
 231 void
 232 GameSession::on_escape_press()
 233 {
 234   if(currentsector->player->is_dying() || end_sequence != NO_ENDSEQUENCE)
 235     return;   // don't let the player open the menu, when he is dying
 236
 237   if (!Menu::current()) {
 238     Menu::set_current(game_menu.get());
 239     game_menu->set_active_item(MNID_CONTINUE);
 240     game_pause = true;
 241   } else {
 242     Menu::set_current(NULL);
 243     game_pause = false;
 244   }
 245 }
 246
 247 void
 248 GameSession::process_events()
 249 {
 250   Player& tux = *currentsector->player;
 251
 252   // end of pause mode?
 253   if(!Menu::current() && game_pause) {
 254     game_pause = false;
 255   }
 256
 257   if (end_sequence != NO_ENDSEQUENCE) {
 258     if(end_sequence_controller == 0) {
 259       end_sequence_controller = new CodeController();
 260       tux.set_controller(end_sequence_controller);
 261     }
 262
 263     end_sequence_controller->press(Controller::RIGHT);
 264
 265     if (int(last_x_pos) == int(tux.get_pos().x))
 266       end_sequence_controller->press(Controller::JUMP);
 267     last_x_pos = tux.get_pos().x;
 268   }
 269
 270   // playback a demo?
 271   if(playback_demo_stream != 0) {
 272     demo_controller->update();
 273     char left = false;
 274     char right = false;
 275     char up = false;
 276     char down = false;
 277     char jump = false;
 278     char action = false;
 279     playback_demo_stream->get(left);
 280     playback_demo_stream->get(right);
 281     playback_demo_stream->get(up);
 282     playback_demo_stream->get(down);
 283     playback_demo_stream->get(jump);
 284     playback_demo_stream->get(action);
 285     demo_controller->press(Controller::LEFT, left);
 286     demo_controller->press(Controller::RIGHT, right);
 287     demo_controller->press(Controller::UP, up);
 288     demo_controller->press(Controller::DOWN, down);
 289     demo_controller->press(Controller::JUMP, jump);
 290     demo_controller->press(Controller::ACTION, action);
 291   }
 292
 293   // save input for demo?
 294   if(capture_demo_stream != 0) {
 295     capture_demo_stream ->put(main_controller->hold(Controller::LEFT));
 296     capture_demo_stream ->put(main_controller->hold(Controller::RIGHT));
 297     capture_demo_stream ->put(main_controller->hold(Controller::UP));
 298     capture_demo_stream ->put(main_controller->hold(Controller::DOWN));
 299     capture_demo_stream ->put(main_controller->hold(Controller::JUMP));
 300     capture_demo_stream ->put(main_controller->hold(Controller::ACTION));
 301   }
 302 }
 303
 304 void
 305 GameSession::check_end_conditions()
 306 {
 307   Player* tux = currentsector->player;
 308
 309   /* End of level? */
 310   if(end_sequence && endsequence_timer.check()) {
 311     finish(true);
 312     return;
 313   } else if (!end_sequence && tux->is_dead()) {
 314     if (player_status->coins < 0) {
 315       // No more coins: restart level from beginning
 316       player_status->coins = 0;
 317       restart_level(true);
 318     } else {
 319       // Still has coins: restart level from last reset point
 320       restart_level(false);
 321     }
 322
 323     return;
 324   }
 325 }
 326
 327 void
 328 GameSession::draw(DrawingContext& context)
 329 {
 330   currentsector->draw(context);
 331   drawstatus(context);
 332
 333   if(game_pause)
 334     draw_pause(context);
 335 }
 336
 337 void
 338 GameSession::draw_pause(DrawingContext& context)
 339 {
 340   context.draw_filled_rect(
 341       Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 342       Color(.2, .2, .2, .5), LAYER_FOREGROUND1);
 343 }
 344
 345 void
 346 GameSession::process_menu()
 347 {
 348   Menu* menu = Menu::current();
 349   if(menu) {
 350     menu->update();
 351
 352     if(menu == game_menu.get()) {
 353       switch (game_menu->check()) {
 354         case MNID_CONTINUE:
 355           Menu::set_current(0);
 356           break;
 357         case MNID_ABORTLEVEL:
 358           Menu::set_current(0);
 359           main_loop->exit_screen();
 360           break;
 361       }
 362     }
 363   }
 364 }
 365
 366 void
 367 GameSession::setup()
 368 {
 369   Menu::set_current(NULL);
 370   current_ = this;
 371
 372   // Eat unneeded events
 373   SDL_Event event;
 374   while(SDL_PollEvent(&event))
 375   {}
 376 }
 377
 378 void
 379 GameSession::update(float elapsed_time)
 380 {
 381   process_events();
 382   process_menu();
 383
 384   check_end_conditions();
 385
 386   // handle controller
 387   if(main_controller->pressed(Controller::PAUSE_MENU))
 388     on_escape_press();
 389
 390   // respawning in new sector?
 391   if(newsector != "" && newspawnpoint != "") {
 392     Sector* sector = level->get_sector(newsector);
 393     if(sector == 0) {
 394       log_warning << "Sector '" << newsector << "' not found" << std::endl;
 395     }
 396     sector->activate(newspawnpoint);
 397     sector->play_music(LEVEL_MUSIC);
 398     currentsector = sector;
 399     newsector = "";
 400     newspawnpoint = "";
 401   }
 402
 403   // Update the world state and all objects in the world
 404   if(!game_pause) {
 405     // Update the world
 406     if (end_sequence == ENDSEQUENCE_RUNNING) {
 407       currentsector->update(elapsed_time/2);
 408     } else if(end_sequence == NO_ENDSEQUENCE) {
 409       if(!currentsector->player->growing_timer.started()) {
 410         play_time += elapsed_time; //TODO: make sure we don't count cutscene time
 411         level->stats.time = play_time;
 412         currentsector->update(elapsed_time);
 413       }
 414     }
 415   }
 416
 417   // update sounds
 418   sound_manager->set_listener_position(currentsector->player->get_pos());
 419
 420   /* Handle music: */
 421   if (end_sequence)
 422     return;
 423
 424   if(currentsector->player->invincible_timer.started()) {
 425     if(currentsector->player->invincible_timer.get_timeleft() <=
 426        TUX_INVINCIBLE_TIME_WARNING) {
 427       currentsector->play_music(HERRING_WARNING_MUSIC);
 428     } else {
 429       currentsector->play_music(HERRING_MUSIC);
 430     }
 431   } else if(currentsector->get_music_type() != LEVEL_MUSIC) {
 432     currentsector->play_music(LEVEL_MUSIC);
 433   }
 434 }
 435
 436 void
 437 GameSession::finish(bool win)
 438 {
 439   using namespace WorldMapNS;
 440
 441   if(win) {
 442     if(WorldMap::current())
 443       WorldMap::current()->finished_level(level.get());
 444   }
 445
 446   main_loop->exit_screen();
 447 }
 448
 449 void
 450 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 451 {
 452   newsector = sector;
 453   newspawnpoint = spawnpoint;
 454 }
 455
 456 void
 457 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 458 {
 459   reset_sector = sector;
 460   reset_pos = pos;
 461 }
 462
 463 std::string
 464 GameSession::get_working_directory()
 465 {
 466   return FileSystem::dirname(levelfile);
 467 }
 468
 469 void
 470 GameSession::display_info_box(const std::string& text)
 471 {
 472   InfoBox* box = new InfoBox(text);
 473
 474   bool running = true;
 475   DrawingContext context;
 476
 477   while(running)  {
 478
 479     // TODO make a screen out of this, another mainloop is ugly
 480     main_controller->update();
 481     SDL_Event event;
 482     while (SDL_PollEvent(&event)) {
 483       main_controller->process_event(event);
 484       if(event.type == SDL_QUIT)
 485         main_loop->quit();
 486     }
 487
 488     if(main_controller->pressed(Controller::JUMP)
 489         || main_controller->pressed(Controller::ACTION)
 490         || main_controller->pressed(Controller::PAUSE_MENU)
 491         || main_controller->pressed(Controller::MENU_SELECT))
 492       running = false;
 493     else if(main_controller->pressed(Controller::DOWN))
 494       box->scrolldown();
 495     else if(main_controller->pressed(Controller::UP))
 496       box->scrollup();
 497     box->draw(context);
 498     draw(context);
 499     context.do_drawing();
 500     sound_manager->update();
 501   }
 502
 503   delete box;
 504 }
 505
 506 void
 507 GameSession::start_sequence(const std::string& sequencename)
 508 {
 509   if(sequencename == "endsequence" || sequencename == "fireworks") {
 510     if(end_sequence)
 511       return;
 512
 513     end_sequence = ENDSEQUENCE_RUNNING;
 514     endsequence_timer.start(7.3);
 515     last_x_pos = -1;
 516     sound_manager->play_music("music/leveldone.ogg", false);
 517     currentsector->player->invincible_timer.start(7.3);
 518
 519     // Stop all clocks.
 520     for(std::vector<GameObject*>::iterator i = currentsector->gameobjects.begin();
 521         i != currentsector->gameobjects.end(); ++i)
 522     {
 523       GameObject* obj = *i;
 524
 525       LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 526       if(lt)
 527         lt->stop();
 528     }
 529
 530     if(sequencename == "fireworks") {
 531       currentsector->add_object(new Fireworks());
 532     }
 533   } else if(sequencename == "stoptux") {
 534     if(!end_sequence) {
 535       log_warning << "Final target reached without an active end sequence" << std::endl;
 536       this->start_sequence("endsequence");
 537     }
 538     end_sequence =  ENDSEQUENCE_WAITING;
 539   } else {
 540     log_warning << "Unknown sequence '" << sequencename << "'" << std::endl;
 541   }
 542 }
 543
 544 /* (Status): */
 545 void
 546 GameSession::drawstatus(DrawingContext& context)
 547 {
 548   player_status->draw(context);
 549
 550   // draw level stats while end_sequence is running
 551   if (end_sequence) {
 552     level->stats.draw_endseq_panel(context, best_level_statistics, statistics_backdrop.get());
 553   }
 554 }
 555