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 {
  88   current_ = this;
  89   currentsector = NULL;
  90
  91   game_pause = false;
  92
  93   statistics_backdrop.reset(new Surface("images/engine/menu/score-backdrop.png"));
  94
  95   restart_level(true);
  96
  97   game_menu.reset(new Menu());
  98   game_menu->add_label(_("Pause"));
  99   game_menu->add_hl();
 100   game_menu->add_entry(MNID_CONTINUE, _("Continue"));
 101   game_menu->add_submenu(_("Options"), get_options_menu());
 102   game_menu->add_hl();
 103   game_menu->add_entry(MNID_ABORTLEVEL, _("Abort Level"));
 104 }
 105
 106 void
 107 GameSession::restart_level(bool fromBeginning)
 108 {
 109   game_pause   = false;
 110   end_sequence = NO_ENDSEQUENCE;
 111
 112   main_controller->reset();
 113
 114   currentsector = 0;
 115
 116   level.reset(new Level);
 117   level->load(levelfile);
 118
 119   level->stats.reset();
 120   level->stats.set_total_points(COINS_COLLECTED_STAT, level->get_total_coins());
 121   level->stats.set_total_points(BADGUYS_KILLED_STAT, level->get_total_badguys());
 122
 123   // get time
 124   int time = 0;
 125   for(std::vector<Sector*>::iterator i = level->sectors.begin(); i != level->sectors.end(); ++i)
 126   {
 127     Sector* sec = *i;
 128
 129     for(std::vector<GameObject*>::iterator j = sec->gameobjects.begin();
 130         j != sec->gameobjects.end(); ++j)
 131     {
 132       GameObject* obj = *j;
 133
 134       LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 135       if(lt)
 136         time += int(lt->get_level_time());
 137     }
 138   }
 139   level->stats.set_total_points(TIME_NEEDED_STAT, (time == 0) ? -1 : time);
 140
 141   if (fromBeginning) reset_sector="";
 142   if(reset_sector != "") {
 143     currentsector = level->get_sector(reset_sector);
 144     if(!currentsector) {
 145       std::stringstream msg;
 146       msg << "Couldn't find sector '" << reset_sector << "' for resetting tux.";
 147       throw std::runtime_error(msg.str());
 148     }
 149     currentsector->activate(reset_pos);
 150   } else {
 151     currentsector = level->get_sector("main");
 152     if(!currentsector)
 153       throw std::runtime_error("Couldn't find main sector");
 154     currentsector->activate("main");
 155   }
 156
 157   levelintro();
 158
 159   currentsector->play_music(LEVEL_MUSIC);
 160
 161   if(capture_file != "")
 162     record_demo(capture_file);
 163 }
 164
 165 GameSession::~GameSession()
 166 {
 167   delete capture_demo_stream;
 168   delete playback_demo_stream;
 169   delete demo_controller;
 170
 171   delete end_sequence_controller;
 172
 173   current_ = NULL;
 174 }
 175
 176 void
 177 GameSession::record_demo(const std::string& filename)
 178 {
 179   delete capture_demo_stream;
 180
 181   capture_demo_stream = new std::ofstream(filename.c_str());
 182   if(!capture_demo_stream->good()) {
 183     std::stringstream msg;
 184     msg << "Couldn't open demo file '" << filename << "' for writing.";
 185     throw std::runtime_error(msg.str());
 186   }
 187   capture_file = filename;
 188 }
 189
 190 void
 191 GameSession::play_demo(const std::string& filename)
 192 {
 193   delete playback_demo_stream;
 194   delete demo_controller;
 195
 196   playback_demo_stream = new std::ifstream(filename.c_str());
 197   if(!playback_demo_stream->good()) {
 198     std::stringstream msg;
 199     msg << "Couldn't open demo file '" << filename << "' for reading.";
 200     throw std::runtime_error(msg.str());
 201   }
 202
 203   Player& tux = *currentsector->player;
 204   demo_controller = new CodeController();
 205   tux.set_controller(demo_controller);
 206 }
 207
 208 void
 209 GameSession::levelintro()
 210 {
 211   char str[60];
 212
 213   sound_manager->stop_music();
 214
 215   DrawingContext context;
 216   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 217       i != currentsector->gameobjects.end(); ++i) {
 218     Background* background = dynamic_cast<Background*> (*i);
 219     if(background) {
 220       background->draw(context);
 221     }
 222     Gradient* gradient = dynamic_cast<Gradient*> (*i);
 223     if(gradient) {
 224       gradient->draw(context);
 225     }
 226   }
 227
 228 //  context.draw_text(gold_text, level->get_name(), Vector(SCREEN_WIDTH/2, 160),
 229 //      CENTER_ALLIGN, LAYER_FOREGROUND1);
 230   context.draw_center_text(gold_text, level->get_name(), Vector(0, 160),
 231       LAYER_FOREGROUND1);
 232
 233   sprintf(str, "Coins: %d", player_status->coins);
 234   context.draw_text(white_text, str, Vector(SCREEN_WIDTH/2, 210),
 235       CENTER_ALLIGN, LAYER_FOREGROUND1);
 236
 237   if((level->get_author().size()) && (level->get_author() != "SuperTux Team"))
 238     //TODO make author check case/blank-insensitive
 239     context.draw_text(white_small_text,
 240       std::string(_("contributed by ")) + level->get_author(),
 241       Vector(SCREEN_WIDTH/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 242
 243
 244   if(best_level_statistics != NULL)
 245     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 246
 247   wait_for_event(1.0, 3.0);
 248 }
 249
 250 void
 251 GameSession::on_escape_press()
 252 {
 253   if(currentsector->player->is_dying() || end_sequence != NO_ENDSEQUENCE)
 254     return;   // don't let the player open the menu, when he is dying
 255
 256   if (!Menu::current()) {
 257     Menu::set_current(game_menu.get());
 258     game_menu->set_active_item(MNID_CONTINUE);
 259     game_pause = true;
 260   } else {
 261     Menu::set_current(NULL);
 262     game_pause = false;
 263   }
 264 }
 265
 266 void
 267 GameSession::process_events()
 268 {
 269   Player& tux = *currentsector->player;
 270
 271   // end of pause mode?
 272   if(!Menu::current() && game_pause) {
 273     game_pause = false;
 274   }
 275
 276   if (end_sequence != NO_ENDSEQUENCE) {
 277     if(end_sequence_controller == 0) {
 278       end_sequence_controller = new CodeController();
 279       tux.set_controller(end_sequence_controller);
 280     }
 281
 282     end_sequence_controller->press(Controller::RIGHT);
 283
 284     if (int(last_x_pos) == int(tux.get_pos().x))
 285       end_sequence_controller->press(Controller::JUMP);
 286     last_x_pos = tux.get_pos().x;
 287   }
 288
 289   // playback a demo?
 290   if(playback_demo_stream != 0) {
 291     demo_controller->update();
 292     char left = false;
 293     char right = false;
 294     char up = false;
 295     char down = false;
 296     char jump = false;
 297     char action = false;
 298     playback_demo_stream->get(left);
 299     playback_demo_stream->get(right);
 300     playback_demo_stream->get(up);
 301     playback_demo_stream->get(down);
 302     playback_demo_stream->get(jump);
 303     playback_demo_stream->get(action);
 304     demo_controller->press(Controller::LEFT, left);
 305     demo_controller->press(Controller::RIGHT, right);
 306     demo_controller->press(Controller::UP, up);
 307     demo_controller->press(Controller::DOWN, down);
 308     demo_controller->press(Controller::JUMP, jump);
 309     demo_controller->press(Controller::ACTION, action);
 310   }
 311
 312   // save input for demo?
 313   if(capture_demo_stream != 0) {
 314     capture_demo_stream ->put(main_controller->hold(Controller::LEFT));
 315     capture_demo_stream ->put(main_controller->hold(Controller::RIGHT));
 316     capture_demo_stream ->put(main_controller->hold(Controller::UP));
 317     capture_demo_stream ->put(main_controller->hold(Controller::DOWN));
 318     capture_demo_stream ->put(main_controller->hold(Controller::JUMP));
 319     capture_demo_stream ->put(main_controller->hold(Controller::ACTION));
 320   }
 321 }
 322
 323 void
 324 GameSession::check_end_conditions()
 325 {
 326   Player* tux = currentsector->player;
 327
 328   /* End of level? */
 329   if(end_sequence && endsequence_timer.check()) {
 330     finish(true);
 331     return;
 332   } else if (!end_sequence && tux->is_dead()) {
 333     if (player_status->coins < 0) {
 334       // No more coins: restart level from beginning
 335       player_status->coins = 0;
 336       restart_level(true);
 337     } else {
 338       // Still has coins: restart level from last reset point
 339       restart_level(false);
 340     }
 341
 342     return;
 343   }
 344 }
 345
 346 void
 347 GameSession::draw(DrawingContext& context)
 348 {
 349   currentsector->draw(context);
 350   drawstatus(context);
 351
 352   if(game_pause)
 353     draw_pause(context);
 354 }
 355
 356 void
 357 GameSession::draw_pause(DrawingContext& context)
 358 {
 359   context.draw_filled_rect(
 360       Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 361       Color(.2, .2, .2, .5), LAYER_FOREGROUND1);
 362 }
 363
 364 void
 365 GameSession::process_menu()
 366 {
 367   Menu* menu = Menu::current();
 368   if(menu) {
 369     menu->update();
 370
 371     if(menu == game_menu.get()) {
 372       switch (game_menu->check()) {
 373         case MNID_CONTINUE:
 374           Menu::set_current(0);
 375           break;
 376         case MNID_ABORTLEVEL:
 377           Menu::set_current(0);
 378           main_loop->exit_screen();
 379           break;
 380       }
 381     }
 382   }
 383 }
 384
 385 void
 386 GameSession::setup()
 387 {
 388   Menu::set_current(NULL);
 389   current_ = this;
 390
 391   // Eat unneeded events
 392   SDL_Event event;
 393   while(SDL_PollEvent(&event))
 394   {}
 395 }
 396
 397 void
 398 GameSession::update(float elapsed_time)
 399 {
 400   process_events();
 401   process_menu();
 402
 403   check_end_conditions();
 404
 405   // handle controller
 406   if(main_controller->pressed(Controller::PAUSE_MENU))
 407     on_escape_press();
 408
 409   // respawning in new sector?
 410   if(newsector != "" && newspawnpoint != "") {
 411     Sector* sector = level->get_sector(newsector);
 412     if(sector == 0) {
 413       log_warning << "Sector '" << newsector << "' not found" << std::endl;
 414     }
 415     sector->activate(newspawnpoint);
 416     sector->play_music(LEVEL_MUSIC);
 417     currentsector = sector;
 418     newsector = "";
 419     newspawnpoint = "";
 420   }
 421
 422   // Update the world state and all objects in the world
 423   if(!game_pause) {
 424     // Update the world
 425     if (end_sequence == ENDSEQUENCE_RUNNING) {
 426       currentsector->update(elapsed_time/2);
 427     } else if(end_sequence == NO_ENDSEQUENCE) {
 428       if(!currentsector->player->growing_timer.started())
 429         currentsector->update(elapsed_time);
 430     }
 431   }
 432
 433   // update sounds
 434   sound_manager->set_listener_position(currentsector->player->get_pos());
 435
 436   /* Handle music: */
 437   if (end_sequence)
 438     return;
 439
 440   if(currentsector->player->invincible_timer.started()) {
 441     if(currentsector->player->invincible_timer.get_timeleft() <=
 442        TUX_INVINCIBLE_TIME_WARNING) {
 443       currentsector->play_music(HERRING_WARNING_MUSIC);
 444     } else {
 445       currentsector->play_music(HERRING_MUSIC);
 446     }
 447   } else if(currentsector->get_music_type() != LEVEL_MUSIC) {
 448     currentsector->play_music(LEVEL_MUSIC);
 449   }
 450 }
 451
 452 void
 453 GameSession::finish(bool win)
 454 {
 455   using namespace WorldMapNS;
 456
 457   if(win) {
 458     if(WorldMap::current())
 459       WorldMap::current()->finished_level(level.get());
 460   }
 461
 462   main_loop->exit_screen();
 463 }
 464
 465 void
 466 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 467 {
 468   newsector = sector;
 469   newspawnpoint = spawnpoint;
 470 }
 471
 472 void
 473 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 474 {
 475   reset_sector = sector;
 476   reset_pos = pos;
 477 }
 478
 479 std::string
 480 GameSession::get_working_directory()
 481 {
 482   return FileSystem::dirname(levelfile);
 483 }
 484
 485 void
 486 GameSession::display_info_box(const std::string& text)
 487 {
 488   InfoBox* box = new InfoBox(text);
 489
 490   bool running = true;
 491   DrawingContext context;
 492
 493   while(running)  {
 494
 495     // TODO make a screen out of this, another mainloop is ugly
 496     main_controller->update();
 497     SDL_Event event;
 498     while (SDL_PollEvent(&event)) {
 499       main_controller->process_event(event);
 500       if(event.type == SDL_QUIT)
 501         main_loop->quit();
 502     }
 503
 504     if(main_controller->pressed(Controller::JUMP)
 505         || main_controller->pressed(Controller::ACTION)
 506         || main_controller->pressed(Controller::PAUSE_MENU)
 507         || main_controller->pressed(Controller::MENU_SELECT))
 508       running = false;
 509     else if(main_controller->pressed(Controller::DOWN))
 510       box->scrolldown();
 511     else if(main_controller->pressed(Controller::UP))
 512       box->scrollup();
 513     box->draw(context);
 514     draw(context);
 515     context.do_drawing();
 516     sound_manager->update();
 517   }
 518
 519   delete box;
 520 }
 521
 522 void
 523 GameSession::start_sequence(const std::string& sequencename)
 524 {
 525   if(sequencename == "endsequence" || sequencename == "fireworks") {
 526     if(end_sequence)
 527       return;
 528
 529     end_sequence = ENDSEQUENCE_RUNNING;
 530     endsequence_timer.start(7.3);
 531     last_x_pos = -1;
 532     sound_manager->play_music("music/leveldone.ogg", false);
 533     currentsector->player->invincible_timer.start(7.3);
 534
 535     // Stop all clocks.
 536     for(std::vector<GameObject*>::iterator i = currentsector->gameobjects.begin();
 537         i != currentsector->gameobjects.end(); ++i)
 538     {
 539       GameObject* obj = *i;
 540
 541       LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 542       if(lt)
 543         lt->stop();
 544     }
 545
 546     // add time spent to statistics
 547     int tottime = 0, remtime = 0;
 548     for(std::vector<Sector*>::iterator i = level->sectors.begin(); i != level->sectors.end(); ++i)
 549     {
 550       Sector* sec = *i;
 551
 552       for(std::vector<GameObject*>::iterator j = sec->gameobjects.begin();
 553           j != sec->gameobjects.end(); ++j)
 554       {
 555         GameObject* obj = *j;
 556
 557         LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 558         if(lt)
 559         {
 560           tottime += int(lt->get_level_time());
 561           remtime += int(lt->get_remaining_time());
 562         }
 563       }
 564     }
 565     level->stats.set_points(TIME_NEEDED_STAT, (tottime == 0 ? -1 : (tottime-remtime)));
 566
 567     if(sequencename == "fireworks") {
 568       currentsector->add_object(new Fireworks());
 569     }
 570   } else if(sequencename == "stoptux") {
 571     if(!end_sequence) {
 572       log_warning << "Final target reached without an active end sequence" << std::endl;
 573       this->start_sequence("endsequence");
 574     }
 575     end_sequence =  ENDSEQUENCE_WAITING;
 576   } else {
 577     log_warning << "Unknown sequence '" << sequencename << "'" << std::endl;
 578   }
 579 }
 580
 581 /* (Status): */
 582 void
 583 GameSession::drawstatus(DrawingContext& context)
 584 {
 585   player_status->draw(context);
 586
 587   // draw level stats while end_sequence is running
 588   if (end_sequence) {
 589     level->stats.draw_endseq_panel(context, best_level_statistics, statistics_backdrop.get());
 590   }
 591 }
 592