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 #include "trigger/secretarea_trigger.hpp"
  70
  71 // the engine will be run with a logical framerate of 64fps.
  72 // We chose 64fps here because it is a power of 2, so 1/64 gives an "even"
  73 // binary fraction...
  74 static const float LOGICAL_FPS = 64.0;
  75
  76 enum GameMenuIDs {
  77   MNID_CONTINUE,
  78   MNID_ABORTLEVEL
  79 };
  80
  81 GameSession* GameSession::current_ = NULL;
  82
  83 GameSession::GameSession(const std::string& levelfile_, Statistics* statistics)
  84   : level(0), currentsector(0),
  85     end_sequence(NO_ENDSEQUENCE), end_sequence_controller(0),
  86     levelfile(levelfile_), best_level_statistics(statistics),
  87     capture_demo_stream(0), playback_demo_stream(0), demo_controller(0),
  88     play_time(0)
  89 {
  90   current_ = this;
  91   currentsector = NULL;
  92
  93   game_pause = false;
  94
  95   statistics_backdrop.reset(new Surface("images/engine/menu/score-backdrop.png"));
  96
  97   restart_level(true);
  98
  99   game_menu.reset(new Menu());
 100   game_menu->add_label(_("Pause"));
 101   game_menu->add_hl();
 102   game_menu->add_entry(MNID_CONTINUE, _("Continue"));
 103   game_menu->add_submenu(_("Options"), get_options_menu());
 104   game_menu->add_hl();
 105   game_menu->add_entry(MNID_ABORTLEVEL, _("Abort Level"));
 106 }
 107
 108 void
 109 GameSession::restart_level(bool fromBeginning)
 110 {
 111   game_pause   = false;
 112   end_sequence = NO_ENDSEQUENCE;
 113
 114   main_controller->reset();
 115
 116   currentsector = 0;
 117
 118   level.reset(new Level);
 119   level->load(levelfile);
 120   level->stats.total_coins = level->get_total_coins();
 121   level->stats.total_badguys = level->get_total_badguys();
 122   level->stats.total_secrets = level->get_total_count<SecretAreaTrigger>();
 123   level->stats.reset();
 124
 125   if (fromBeginning) reset_sector="";
 126   if(reset_sector != "") {
 127     currentsector = level->get_sector(reset_sector);
 128     if(!currentsector) {
 129       std::stringstream msg;
 130       msg << "Couldn't find sector '" << reset_sector << "' for resetting tux.";
 131       throw std::runtime_error(msg.str());
 132     }
 133     currentsector->activate(reset_pos);
 134   } else {
 135     currentsector = level->get_sector("main");
 136     if(!currentsector)
 137       throw std::runtime_error("Couldn't find main sector");
 138     currentsector->activate("main");
 139   }
 140
 141   levelintro();
 142
 143   currentsector->play_music(LEVEL_MUSIC);
 144
 145   if(capture_file != "")
 146     record_demo(capture_file);
 147 }
 148
 149 GameSession::~GameSession()
 150 {
 151   delete capture_demo_stream;
 152   delete playback_demo_stream;
 153   delete demo_controller;
 154
 155   delete end_sequence_controller;
 156
 157   current_ = NULL;
 158 }
 159
 160 void
 161 GameSession::record_demo(const std::string& filename)
 162 {
 163   delete capture_demo_stream;
 164
 165   capture_demo_stream = new std::ofstream(filename.c_str());
 166   if(!capture_demo_stream->good()) {
 167     std::stringstream msg;
 168     msg << "Couldn't open demo file '" << filename << "' for writing.";
 169     throw std::runtime_error(msg.str());
 170   }
 171   capture_file = filename;
 172 }
 173
 174 void
 175 GameSession::play_demo(const std::string& filename)
 176 {
 177   delete playback_demo_stream;
 178   delete demo_controller;
 179
 180   playback_demo_stream = new std::ifstream(filename.c_str());
 181   if(!playback_demo_stream->good()) {
 182     std::stringstream msg;
 183     msg << "Couldn't open demo file '" << filename << "' for reading.";
 184     throw std::runtime_error(msg.str());
 185   }
 186
 187   Player& tux = *currentsector->player;
 188   demo_controller = new CodeController();
 189   tux.set_controller(demo_controller);
 190 }
 191
 192 void
 193 GameSession::levelintro()
 194 {
 195   char str[60];
 196
 197   sound_manager->stop_music();
 198
 199   DrawingContext context;
 200   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 201       i != currentsector->gameobjects.end(); ++i) {
 202     Background* background = dynamic_cast<Background*> (*i);
 203     if(background) {
 204       background->draw(context);
 205     }
 206     Gradient* gradient = dynamic_cast<Gradient*> (*i);
 207     if(gradient) {
 208       gradient->draw(context);
 209     }
 210   }
 211
 212 //  context.draw_text(gold_text, level->get_name(), Vector(SCREEN_WIDTH/2, 160),
 213 //      CENTER_ALLIGN, LAYER_FOREGROUND1);
 214   context.draw_center_text(gold_text, level->get_name(), Vector(0, 160),
 215       LAYER_FOREGROUND1);
 216
 217   sprintf(str, "Coins: %d", player_status->coins);
 218   context.draw_text(white_text, str, Vector(SCREEN_WIDTH/2, 210),
 219       CENTER_ALLIGN, LAYER_FOREGROUND1);
 220
 221   if((level->get_author().size()) && (level->get_author() != "SuperTux Team"))
 222     context.draw_text(white_small_text,
 223       std::string(_("contributed by ")) + level->get_author(),
 224       Vector(SCREEN_WIDTH/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 225
 226   if(best_level_statistics != NULL)
 227     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 228
 229   wait_for_event(1.0, 3.0);
 230 }
 231
 232 void
 233 GameSession::on_escape_press()
 234 {
 235   if(currentsector->player->is_dying() || end_sequence != NO_ENDSEQUENCE)
 236     return;   // don't let the player open the menu, when he is dying
 237
 238   if (!Menu::current()) {
 239     Menu::set_current(game_menu.get());
 240     game_menu->set_active_item(MNID_CONTINUE);
 241     game_pause = true;
 242   } else {
 243     Menu::set_current(NULL);
 244     game_pause = false;
 245   }
 246 }
 247
 248 void
 249 GameSession::process_events()
 250 {
 251   Player& tux = *currentsector->player;
 252
 253   // end of pause mode?
 254   if(!Menu::current() && game_pause) {
 255     game_pause = false;
 256   }
 257
 258   if (end_sequence != NO_ENDSEQUENCE) {
 259     if(end_sequence_controller == 0) {
 260       end_sequence_controller = new CodeController();
 261       tux.set_controller(end_sequence_controller);
 262     }
 263
 264     end_sequence_controller->press(Controller::RIGHT);
 265
 266     if (int(last_x_pos) == int(tux.get_pos().x))
 267       end_sequence_controller->press(Controller::JUMP);
 268     last_x_pos = tux.get_pos().x;
 269   }
 270
 271   // playback a demo?
 272   if(playback_demo_stream != 0) {
 273     demo_controller->update();
 274     char left = false;
 275     char right = false;
 276     char up = false;
 277     char down = false;
 278     char jump = false;
 279     char action = false;
 280     playback_demo_stream->get(left);
 281     playback_demo_stream->get(right);
 282     playback_demo_stream->get(up);
 283     playback_demo_stream->get(down);
 284     playback_demo_stream->get(jump);
 285     playback_demo_stream->get(action);
 286     demo_controller->press(Controller::LEFT, left);
 287     demo_controller->press(Controller::RIGHT, right);
 288     demo_controller->press(Controller::UP, up);
 289     demo_controller->press(Controller::DOWN, down);
 290     demo_controller->press(Controller::JUMP, jump);
 291     demo_controller->press(Controller::ACTION, action);
 292   }
 293
 294   // save input for demo?
 295   if(capture_demo_stream != 0) {
 296     capture_demo_stream ->put(main_controller->hold(Controller::LEFT));
 297     capture_demo_stream ->put(main_controller->hold(Controller::RIGHT));
 298     capture_demo_stream ->put(main_controller->hold(Controller::UP));
 299     capture_demo_stream ->put(main_controller->hold(Controller::DOWN));
 300     capture_demo_stream ->put(main_controller->hold(Controller::JUMP));
 301     capture_demo_stream ->put(main_controller->hold(Controller::ACTION));
 302   }
 303 }
 304
 305 void
 306 GameSession::check_end_conditions()
 307 {
 308   Player* tux = currentsector->player;
 309
 310   /* End of level? */
 311   if(end_sequence && endsequence_timer.check()) {
 312     finish(true);
 313     return;
 314   } else if (!end_sequence && tux->is_dead()) {
 315     if (player_status->coins < 0) {
 316       // No more coins: restart level from beginning
 317       player_status->coins = 0;
 318       restart_level(true);
 319     } else {
 320       // Still has coins: restart level from last reset point
 321       restart_level(false);
 322     }
 323
 324     return;
 325   }
 326 }
 327
 328 void
 329 GameSession::draw(DrawingContext& context)
 330 {
 331   currentsector->draw(context);
 332   drawstatus(context);
 333
 334   if(game_pause)
 335     draw_pause(context);
 336 }
 337
 338 void
 339 GameSession::draw_pause(DrawingContext& context)
 340 {
 341   context.draw_filled_rect(
 342       Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 343       Color(.2, .2, .2, .5), LAYER_FOREGROUND1);
 344 }
 345
 346 void
 347 GameSession::process_menu()
 348 {
 349   Menu* menu = Menu::current();
 350   if(menu) {
 351     menu->update();
 352
 353     if(menu == game_menu.get()) {
 354       switch (game_menu->check()) {
 355         case MNID_CONTINUE:
 356           Menu::set_current(0);
 357           break;
 358         case MNID_ABORTLEVEL:
 359           Menu::set_current(0);
 360           main_loop->exit_screen();
 361           break;
 362       }
 363     }
 364   }
 365 }
 366
 367 void
 368 GameSession::setup()
 369 {
 370   Menu::set_current(NULL);
 371   current_ = this;
 372
 373   // Eat unneeded events
 374   SDL_Event event;
 375   while(SDL_PollEvent(&event))
 376   {}
 377 }
 378
 379 void
 380 GameSession::update(float elapsed_time)
 381 {
 382   process_events();
 383   process_menu();
 384
 385   check_end_conditions();
 386
 387   // handle controller
 388   if(main_controller->pressed(Controller::PAUSE_MENU))
 389     on_escape_press();
 390
 391   // respawning in new sector?
 392   if(newsector != "" && newspawnpoint != "") {
 393     Sector* sector = level->get_sector(newsector);
 394     if(sector == 0) {
 395       log_warning << "Sector '" << newsector << "' not found" << std::endl;
 396     }
 397     sector->activate(newspawnpoint);
 398     sector->play_music(LEVEL_MUSIC);
 399     currentsector = sector;
 400     newsector = "";
 401     newspawnpoint = "";
 402   }
 403
 404   // Update the world state and all objects in the world
 405   if(!game_pause) {
 406     // Update the world
 407     if (end_sequence == ENDSEQUENCE_RUNNING) {
 408       currentsector->update(elapsed_time/2);
 409     } else if(end_sequence == NO_ENDSEQUENCE) {
 410       if(!currentsector->player->growing_timer.started()) {
 411         play_time += elapsed_time; //TODO: make sure we don't count cutscene time
 412         level->stats.time = play_time;
 413         currentsector->update(elapsed_time);
 414       }
 415     }
 416   }
 417
 418   // update sounds
 419   sound_manager->set_listener_position(currentsector->player->get_pos());
 420
 421   /* Handle music: */
 422   if (end_sequence)
 423     return;
 424
 425   if(currentsector->player->invincible_timer.started()) {
 426     if(currentsector->player->invincible_timer.get_timeleft() <=
 427        TUX_INVINCIBLE_TIME_WARNING) {
 428       currentsector->play_music(HERRING_WARNING_MUSIC);
 429     } else {
 430       currentsector->play_music(HERRING_MUSIC);
 431     }
 432   } else if(currentsector->get_music_type() != LEVEL_MUSIC) {
 433     currentsector->play_music(LEVEL_MUSIC);
 434   }
 435 }
 436
 437 void
 438 GameSession::finish(bool win)
 439 {
 440   using namespace WorldMapNS;
 441
 442   if(win) {
 443     if(WorldMap::current())
 444       WorldMap::current()->finished_level(level.get());
 445   }
 446
 447   main_loop->exit_screen();
 448 }
 449
 450 void
 451 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 452 {
 453   newsector = sector;
 454   newspawnpoint = spawnpoint;
 455 }
 456
 457 void
 458 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 459 {
 460   reset_sector = sector;
 461   reset_pos = pos;
 462 }
 463
 464 std::string
 465 GameSession::get_working_directory()
 466 {
 467   return FileSystem::dirname(levelfile);
 468 }
 469
 470 void
 471 GameSession::display_info_box(const std::string& text)
 472 {
 473   InfoBox* box = new InfoBox(text);
 474
 475   bool running = true;
 476   DrawingContext context;
 477
 478   while(running)  {
 479
 480     // TODO make a screen out of this, another mainloop is ugly
 481     main_controller->update();
 482     SDL_Event event;
 483     while (SDL_PollEvent(&event)) {
 484       main_controller->process_event(event);
 485       if(event.type == SDL_QUIT)
 486         main_loop->quit();
 487     }
 488
 489     if(main_controller->pressed(Controller::JUMP)
 490         || main_controller->pressed(Controller::ACTION)
 491         || main_controller->pressed(Controller::PAUSE_MENU)
 492         || main_controller->pressed(Controller::MENU_SELECT))
 493       running = false;
 494     else if(main_controller->pressed(Controller::DOWN))
 495       box->scrolldown();
 496     else if(main_controller->pressed(Controller::UP))
 497       box->scrollup();
 498     box->draw(context);
 499     draw(context);
 500     context.do_drawing();
 501     sound_manager->update();
 502   }
 503
 504   delete box;
 505 }
 506
 507 void
 508 GameSession::start_sequence(const std::string& sequencename)
 509 {
 510   if(sequencename == "endsequence" || sequencename == "fireworks") {
 511     if(end_sequence)
 512       return;
 513
 514     end_sequence = ENDSEQUENCE_RUNNING;
 515     endsequence_timer.start(7.3);
 516     last_x_pos = -1;
 517     sound_manager->play_music("music/leveldone.ogg", false);
 518     currentsector->player->invincible_timer.start(7.3);
 519
 520     // Stop all clocks.
 521     for(std::vector<GameObject*>::iterator i = currentsector->gameobjects.begin();
 522         i != currentsector->gameobjects.end(); ++i)
 523     {
 524       GameObject* obj = *i;
 525
 526       LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 527       if(lt)
 528         lt->stop();
 529     }
 530
 531     if(sequencename == "fireworks") {
 532       currentsector->add_object(new Fireworks());
 533     }
 534   } else if(sequencename == "stoptux") {
 535     if(!end_sequence) {
 536       log_warning << "Final target reached without an active end sequence" << std::endl;
 537       this->start_sequence("endsequence");
 538     }
 539     end_sequence =  ENDSEQUENCE_WAITING;
 540   } else {
 541     log_warning << "Unknown sequence '" << sequencename << "'" << std::endl;
 542   }
 543 }
 544
 545 /* (Status): */
 546 void
 547 GameSession::drawstatus(DrawingContext& context)
 548 {
 549   player_status->draw(context);
 550
 551   // draw level stats while end_sequence is running
 552   if (end_sequence) {
 553     level->stats.draw_endseq_panel(context, best_level_statistics, statistics_backdrop.get());
 554   }
 555 }
 556