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 #include "random_generator.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     int newSeed=0;               // next run uses a new seed
 147     while (newSeed == 0)            // which is the next non-zero random num.
 148         newSeed = systemRandom.rand();
 149     config->random_seed = systemRandom.srand(newSeed);
 150     log_info << "Next run uses random seed " <<config->random_seed <<std::endl;
 151     record_demo(capture_file);
 152   }
 153 }
 154
 155 GameSession::~GameSession()
 156 {
 157   delete capture_demo_stream;
 158   delete playback_demo_stream;
 159   delete demo_controller;
 160
 161   delete end_sequence_controller;
 162
 163   current_ = NULL;
 164 }
 165
 166 void
 167 GameSession::record_demo(const std::string& filename)
 168 {
 169   delete capture_demo_stream;
 170
 171   capture_demo_stream = new std::ofstream(filename.c_str());
 172   if(!capture_demo_stream->good()) {
 173     std::stringstream msg;
 174     msg << "Couldn't open demo file '" << filename << "' for writing.";
 175     throw std::runtime_error(msg.str());
 176   }
 177   capture_file = filename;
 178
 179   char buf[30];                            // save the seed in the demo file
 180   sprintf(buf, "random_seed=%010d", config->random_seed);
 181   for (int i=0; i==0 || buf[i-1]; i++)
 182     capture_demo_stream->put(buf[i]);
 183 }
 184
 185 void
 186 GameSession::play_demo(const std::string& filename)
 187 {
 188   delete playback_demo_stream;
 189   delete demo_controller;
 190
 191   playback_demo_stream = new std::ifstream(filename.c_str());
 192   if(!playback_demo_stream->good()) {
 193     std::stringstream msg;
 194     msg << "Couldn't open demo file '" << filename << "' for reading.";
 195     throw std::runtime_error(msg.str());
 196   }
 197
 198   Player& tux = *currentsector->player;
 199   demo_controller = new CodeController();
 200   tux.set_controller(demo_controller);
 201
 202   char buf[30];                            // recall the seed from the demo file
 203   int seed;
 204   for (int i=0; i<30 && (i==0 || buf[i-1]); i++)
 205     playback_demo_stream->get(buf[i]);
 206   if (sscanf(buf, "random_seed=%010d", &seed) == 1) {
 207     config->random_seed = seed;            // save where it will be used
 208     log_info << "Taking random seed " << seed << " from demo file" <<std::endl;
 209   }
 210   else {
 211     playback_demo_stream->seekg(0);     // old style w/o seed, restart at beg
 212     log_info << "Demo file contains no random number" << std::endl;
 213   }
 214 }
 215
 216 void
 217 GameSession::levelintro()
 218 {
 219   char str[60];
 220
 221   sound_manager->stop_music();
 222
 223   DrawingContext context;
 224   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 225       i != currentsector->gameobjects.end(); ++i) {
 226     Background* background = dynamic_cast<Background*> (*i);
 227     if(background) {
 228       background->draw(context);
 229     }
 230     Gradient* gradient = dynamic_cast<Gradient*> (*i);
 231     if(gradient) {
 232       gradient->draw(context);
 233     }
 234   }
 235
 236 //  context.draw_text(gold_text, level->get_name(), Vector(SCREEN_WIDTH/2, 160),
 237 //      CENTER_ALLIGN, LAYER_FOREGROUND1);
 238   context.draw_center_text(gold_text, level->get_name(), Vector(0, 160),
 239       LAYER_FOREGROUND1);
 240
 241   sprintf(str, "Coins: %d", player_status->coins);
 242   context.draw_text(white_text, str, Vector(SCREEN_WIDTH/2, 210),
 243       CENTER_ALLIGN, LAYER_FOREGROUND1);
 244
 245   if((level->get_author().size()) && (level->get_author() != "SuperTux Team"))
 246     context.draw_text(white_small_text,
 247       std::string(_("contributed by ")) + level->get_author(),
 248       Vector(SCREEN_WIDTH/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 249
 250   if(best_level_statistics != NULL)
 251     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 252
 253   wait_for_event(1.0, 3.0);
 254 }
 255
 256 void
 257 GameSession::on_escape_press()
 258 {
 259   if(currentsector->player->is_dying() || end_sequence != NO_ENDSEQUENCE)
 260     return;   // don't let the player open the menu, when he is dying
 261
 262   if (!Menu::current()) {
 263     Menu::set_current(game_menu.get());
 264     game_menu->set_active_item(MNID_CONTINUE);
 265     game_pause = true;
 266   } else {
 267     Menu::set_current(NULL);
 268     game_pause = false;
 269   }
 270 }
 271
 272 void
 273 GameSession::process_events()
 274 {
 275   Player& tux = *currentsector->player;
 276
 277   // end of pause mode?
 278   if(!Menu::current() && game_pause) {
 279     game_pause = false;
 280   }
 281
 282   if (end_sequence != NO_ENDSEQUENCE) {
 283     if(end_sequence_controller == 0) {
 284       end_sequence_controller = new CodeController();
 285       tux.set_controller(end_sequence_controller);
 286     }
 287
 288     end_sequence_controller->press(Controller::RIGHT);
 289
 290     if (int(last_x_pos) == int(tux.get_pos().x))
 291       end_sequence_controller->press(Controller::JUMP);
 292     last_x_pos = tux.get_pos().x;
 293   }
 294
 295   // playback a demo?
 296   if(playback_demo_stream != 0) {
 297     demo_controller->update();
 298     char left = false;
 299     char right = false;
 300     char up = false;
 301     char down = false;
 302     char jump = false;
 303     char action = false;
 304     playback_demo_stream->get(left);
 305     playback_demo_stream->get(right);
 306     playback_demo_stream->get(up);
 307     playback_demo_stream->get(down);
 308     playback_demo_stream->get(jump);
 309     playback_demo_stream->get(action);
 310     demo_controller->press(Controller::LEFT, left);
 311     demo_controller->press(Controller::RIGHT, right);
 312     demo_controller->press(Controller::UP, up);
 313     demo_controller->press(Controller::DOWN, down);
 314     demo_controller->press(Controller::JUMP, jump);
 315     demo_controller->press(Controller::ACTION, action);
 316   }
 317
 318   // save input for demo?
 319   if(capture_demo_stream != 0) {
 320     capture_demo_stream ->put(main_controller->hold(Controller::LEFT));
 321     capture_demo_stream ->put(main_controller->hold(Controller::RIGHT));
 322     capture_demo_stream ->put(main_controller->hold(Controller::UP));
 323     capture_demo_stream ->put(main_controller->hold(Controller::DOWN));
 324     capture_demo_stream ->put(main_controller->hold(Controller::JUMP));
 325     capture_demo_stream ->put(main_controller->hold(Controller::ACTION));
 326   }
 327 }
 328
 329 void
 330 GameSession::check_end_conditions()
 331 {
 332   Player* tux = currentsector->player;
 333
 334   /* End of level? */
 335   if(end_sequence && endsequence_timer.check()) {
 336     finish(true);
 337     return;
 338   } else if (!end_sequence && tux->is_dead()) {
 339     if (player_status->coins < 0) {
 340       // No more coins: restart level from beginning
 341       player_status->coins = 0;
 342       restart_level(true);
 343     } else {
 344       // Still has coins: restart level from last reset point
 345       restart_level(false);
 346     }
 347
 348     return;
 349   }
 350 }
 351
 352 void
 353 GameSession::draw(DrawingContext& context)
 354 {
 355   currentsector->draw(context);
 356   drawstatus(context);
 357
 358   if(game_pause)
 359     draw_pause(context);
 360 }
 361
 362 void
 363 GameSession::draw_pause(DrawingContext& context)
 364 {
 365   context.draw_filled_rect(
 366       Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 367       Color(.2, .2, .2, .5), LAYER_FOREGROUND1);
 368 }
 369
 370 void
 371 GameSession::process_menu()
 372 {
 373   Menu* menu = Menu::current();
 374   if(menu) {
 375     menu->update();
 376
 377     if(menu == game_menu.get()) {
 378       switch (game_menu->check()) {
 379         case MNID_CONTINUE:
 380           Menu::set_current(0);
 381           break;
 382         case MNID_ABORTLEVEL:
 383           Menu::set_current(0);
 384           main_loop->exit_screen();
 385           break;
 386       }
 387     }
 388   }
 389 }
 390
 391 void
 392 GameSession::setup()
 393 {
 394   Menu::set_current(NULL);
 395   current_ = this;
 396
 397   // Eat unneeded events
 398   SDL_Event event;
 399   while(SDL_PollEvent(&event))
 400   {}
 401 }
 402
 403 void
 404 GameSession::update(float elapsed_time)
 405 {
 406   process_events();
 407   process_menu();
 408
 409   check_end_conditions();
 410
 411   // handle controller
 412   if(main_controller->pressed(Controller::PAUSE_MENU))
 413     on_escape_press();
 414
 415   // respawning in new sector?
 416   if(newsector != "" && newspawnpoint != "") {
 417     Sector* sector = level->get_sector(newsector);
 418     if(sector == 0) {
 419       log_warning << "Sector '" << newsector << "' not found" << std::endl;
 420     }
 421     sector->activate(newspawnpoint);
 422     sector->play_music(LEVEL_MUSIC);
 423     currentsector = sector;
 424     newsector = "";
 425     newspawnpoint = "";
 426   }
 427
 428   // Update the world state and all objects in the world
 429   if(!game_pause) {
 430     // Update the world
 431     if (end_sequence == ENDSEQUENCE_RUNNING) {
 432       currentsector->update(elapsed_time/2);
 433     } else if(end_sequence == NO_ENDSEQUENCE) {
 434       if(!currentsector->player->growing_timer.started()) {
 435         play_time += elapsed_time; //TODO: make sure we don't count cutscene time
 436         level->stats.time = play_time;
 437         currentsector->update(elapsed_time);
 438       }
 439     }
 440   }
 441
 442   // update sounds
 443   sound_manager->set_listener_position(currentsector->player->get_pos());
 444
 445   /* Handle music: */
 446   if (end_sequence)
 447     return;
 448
 449   if(currentsector->player->invincible_timer.started()) {
 450     if(currentsector->player->invincible_timer.get_timeleft() <=
 451        TUX_INVINCIBLE_TIME_WARNING) {
 452       currentsector->play_music(HERRING_WARNING_MUSIC);
 453     } else {
 454       currentsector->play_music(HERRING_MUSIC);
 455     }
 456   } else if(currentsector->get_music_type() != LEVEL_MUSIC) {
 457     currentsector->play_music(LEVEL_MUSIC);
 458   }
 459 }
 460
 461 void
 462 GameSession::finish(bool win)
 463 {
 464   using namespace WorldMapNS;
 465
 466   if(win) {
 467     if(WorldMap::current())
 468       WorldMap::current()->finished_level(level.get());
 469   }
 470
 471   main_loop->exit_screen();
 472 }
 473
 474 void
 475 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 476 {
 477   newsector = sector;
 478   newspawnpoint = spawnpoint;
 479 }
 480
 481 void
 482 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 483 {
 484   reset_sector = sector;
 485   reset_pos = pos;
 486 }
 487
 488 std::string
 489 GameSession::get_working_directory()
 490 {
 491   return FileSystem::dirname(levelfile);
 492 }
 493
 494 void
 495 GameSession::display_info_box(const std::string& text)
 496 {
 497   InfoBox* box = new InfoBox(text);
 498
 499   bool running = true;
 500   DrawingContext context;
 501
 502   while(running)  {
 503
 504     // TODO make a screen out of this, another mainloop is ugly
 505     main_controller->update();
 506     SDL_Event event;
 507     while (SDL_PollEvent(&event)) {
 508       main_controller->process_event(event);
 509       if(event.type == SDL_QUIT)
 510         main_loop->quit();
 511     }
 512
 513     if(main_controller->pressed(Controller::JUMP)
 514         || main_controller->pressed(Controller::ACTION)
 515         || main_controller->pressed(Controller::PAUSE_MENU)
 516         || main_controller->pressed(Controller::MENU_SELECT))
 517       running = false;
 518     else if(main_controller->pressed(Controller::DOWN))
 519       box->scrolldown();
 520     else if(main_controller->pressed(Controller::UP))
 521       box->scrollup();
 522     box->draw(context);
 523     draw(context);
 524     context.do_drawing();
 525     sound_manager->update();
 526   }
 527
 528   delete box;
 529 }
 530
 531 void
 532 GameSession::start_sequence(const std::string& sequencename)
 533 {
 534   if(sequencename == "endsequence" || sequencename == "fireworks") {
 535     if(end_sequence)
 536       return;
 537
 538     end_sequence = ENDSEQUENCE_RUNNING;
 539     endsequence_timer.start(7.3);
 540     last_x_pos = -1;
 541     sound_manager->play_music("music/leveldone.ogg", false);
 542     currentsector->player->invincible_timer.start(7.3);
 543
 544     // Stop all clocks.
 545     for(std::vector<GameObject*>::iterator i = currentsector->gameobjects.begin();
 546         i != currentsector->gameobjects.end(); ++i)
 547     {
 548       GameObject* obj = *i;
 549
 550       LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 551       if(lt)
 552         lt->stop();
 553     }
 554
 555     if(sequencename == "fireworks") {
 556       currentsector->add_object(new Fireworks());
 557     }
 558   } else if(sequencename == "stoptux") {
 559     if(!end_sequence) {
 560       log_warning << "Final target reached without an active end sequence" << std::endl;
 561       this->start_sequence("endsequence");
 562     }
 563     end_sequence =  ENDSEQUENCE_WAITING;
 564   } else {
 565     log_warning << "Unknown sequence '" << sequencename << "'" << std::endl;
 566   }
 567 }
 568
 569 /* (Status): */
 570 void
 571 GameSession::drawstatus(DrawingContext& context)
 572 {
 573   player_status->draw(context);
 574
 575   // draw level stats while end_sequence is running
 576   if (end_sequence) {
 577     level->stats.draw_endseq_panel(context, best_level_statistics, statistics_backdrop.get());
 578   }
 579 }
 580