src/supertux/game_session.cpp

   1 //  SuperTux
   2 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   3 //
   4 //  This program is free software: you can redistribute it and/or modify
   5 //  it under the terms of the GNU General Public License as published by
   6 //  the Free Software Foundation, either version 3 of the License, or
   7 //  (at your option) any later version.
   8 //
   9 //  This program is distributed in the hope that it will be useful,
  10 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 //  GNU General Public License for more details.
  13 //
  14 //  You should have received a copy of the GNU General Public License
  15 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "supertux/game_session.hpp"
  18
  19 #include <float.h>
  20 #include <fstream>
  21
  22 #include "audio/sound_manager.hpp"
  23 #include "control/input_manager.hpp"
  24 #include "gui/menu.hpp"
  25 #include "gui/menu_manager.hpp"
  26 #include "math/random_generator.hpp"
  27 #include "object/camera.hpp"
  28 #include "object/endsequence_fireworks.hpp"
  29 #include "object/endsequence_walkleft.hpp"
  30 #include "object/endsequence_walkright.hpp"
  31 #include "object/level_time.hpp"
  32 #include "object/player.hpp"
  33 #include "scripting/squirrel_util.hpp"
  34 #include "supertux/gameconfig.hpp"
  35 #include "supertux/levelintro.hpp"
  36 #include "supertux/globals.hpp"
  37 #include "supertux/player_status.hpp"
  38 #include "supertux/screen_manager.hpp"
  39 #include "supertux/menu/menu_storage.hpp"
  40 #include "supertux/menu/game_menu.hpp"
  41 #include "supertux/menu/options_menu.hpp"
  42 #include "supertux/sector.hpp"
  43 #include "util/file_system.hpp"
  44 #include "util/gettext.hpp"
  45 #include "worldmap/worldmap.hpp"
  46
  47 GameSession::GameSession(const std::string& levelfile_, PlayerStatus* player_status, Statistics* statistics) :
  48   level(),
  49   statistics_backdrop(),
  50   scripts(),
  51   currentsector(0),
  52   levelnb(),
  53   pause_menu_frame(),
  54   end_sequence(0),
  55   game_pause(),
  56   speed_before_pause(),
  57   levelfile(levelfile_),
  58   reset_sector(),
  59   reset_pos(),
  60   newsector(),
  61   newspawnpoint(),
  62   best_level_statistics(statistics),
  63   player_status(player_status),
  64   capture_demo_stream(0),
  65   capture_file(),
  66   playback_demo_stream(0),
  67   demo_controller(0),
  68   game_menu(),
  69   play_time(0),
  70   edit_mode(false),
  71   levelintro_shown(false)
  72 {
  73   currentsector = NULL;
  74
  75   game_pause = false;
  76   speed_before_pause = g_screen_manager->get_speed();
  77
  78   statistics_backdrop = Surface::create("images/engine/menu/score-backdrop.png");
  79
  80   if (restart_level() != 0)
  81     throw std::runtime_error ("Initializing the level failed.");
  82
  83   game_menu.reset(new GameMenu(*level));
  84 }
  85
  86 int
  87 GameSession::restart_level()
  88 {
  89     PlayerStatus* currentStatus = get_player_status();
  90     coins_at_start = currentStatus->coins;
  91     bonus_at_start = currentStatus->bonus;
  92     max_fire_bullets_at_start = currentStatus->max_fire_bullets;
  93     max_ice_bullets_at_start = currentStatus->max_ice_bullets;
  94
  95   if (edit_mode) {
  96     force_ghost_mode();
  97     return (-1);
  98   }
  99
 100   game_pause   = false;
 101   end_sequence = 0;
 102
 103   g_input_manager->reset();
 104
 105   currentsector = 0;
 106
 107   level.reset(new Level);
 108   try {
 109     level->load(levelfile);
 110     level->stats.total_coins = level->get_total_coins();
 111     level->stats.total_badguys = level->get_total_badguys();
 112     level->stats.total_secrets = level->get_total_secrets();
 113     level->stats.reset();
 114
 115     if(reset_sector != "") {
 116       currentsector = level->get_sector(reset_sector);
 117       if(!currentsector) {
 118         std::stringstream msg;
 119         msg << "Couldn't find sector '" << reset_sector << "' for resetting tux.";
 120         throw std::runtime_error(msg.str());
 121       }
 122       currentsector->activate(reset_pos);
 123     } else {
 124       currentsector = level->get_sector("main");
 125       if(!currentsector)
 126         throw std::runtime_error("Couldn't find main sector");
 127       play_time = 0;
 128       currentsector->activate("main");
 129     }
 130   } catch(std::exception& e) {
 131     log_fatal << "Couldn't start level: " << e.what() << std::endl;
 132     g_screen_manager->exit_screen();
 133     return (-1);
 134   }
 135
 136   sound_manager->stop_music();
 137   currentsector->play_music(LEVEL_MUSIC);
 138
 139   if(capture_file != "") {
 140     int newSeed=0;               // next run uses a new seed
 141     while (newSeed == 0)            // which is the next non-zero random num.
 142       newSeed = gameRandom.rand();
 143     g_config->random_seed = gameRandom.srand(newSeed);
 144     log_info << "Next run uses random seed " << g_config->random_seed <<std::endl;
 145     record_demo(capture_file);
 146   }
 147
 148   return (0);
 149 }
 150
 151 GameSession::~GameSession()
 152 {
 153   delete capture_demo_stream;
 154   delete playback_demo_stream;
 155   delete demo_controller;
 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   char buf[30];                            // save the seed in the demo file
 172   snprintf(buf, sizeof(buf), "random_seed=%10d", g_config->random_seed);
 173   for (int i=0; i==0 || buf[i-1]; i++)
 174     capture_demo_stream->put(buf[i]);
 175 }
 176
 177 int
 178 GameSession::get_demo_random_seed(const std::string& filename)
 179 {
 180   std::istream* test_stream = new std::ifstream(filename.c_str());
 181   if(test_stream->good()) {
 182     char buf[30];                     // recall the seed from the demo file
 183     int seed;
 184     for (int i=0; i<30 && (i==0 || buf[i-1]); i++)
 185       test_stream->get(buf[i]);
 186     if (sscanf(buf, "random_seed=%10d", &seed) == 1) {
 187       log_info << "Random seed " << seed << " from demo file" << std::endl;
 188       return seed;
 189     }
 190     else
 191       log_info << "Demo file contains no random number" << std::endl;
 192   }
 193   return 0;
 194 }
 195
 196 void
 197 GameSession::play_demo(const std::string& filename)
 198 {
 199   delete playback_demo_stream;
 200   delete demo_controller;
 201
 202   playback_demo_stream = new std::ifstream(filename.c_str());
 203   if(!playback_demo_stream->good()) {
 204     std::stringstream msg;
 205     msg << "Couldn't open demo file '" << filename << "' for reading.";
 206     throw std::runtime_error(msg.str());
 207   }
 208
 209   Player& tux = *currentsector->player;
 210   demo_controller = new CodeController();
 211   tux.set_controller(demo_controller);
 212
 213   // skip over random seed, if it exists in the file
 214   char buf[30];                            // ascii decimal seed
 215   int seed;
 216   for (int i=0; i<30 && (i==0 || buf[i-1]); i++)
 217     playback_demo_stream->get(buf[i]);
 218   if (sscanf(buf, "random_seed=%010d", &seed) != 1)
 219     playback_demo_stream->seekg(0);     // old style w/o seed, restart at beg
 220 }
 221
 222 void
 223 GameSession::on_escape_press()
 224 {
 225   if(currentsector->player->is_dying() || end_sequence)
 226   {
 227     // Let the timers run out, we fast-forward them to force past a sequence
 228     if (end_sequence)
 229       end_sequence->stop();
 230
 231     currentsector->player->dying_timer.start(FLT_EPSILON);
 232     return;   // don't let the player open the menu, when he is dying
 233   }
 234
 235   if(level->on_menukey_script != "") {
 236     std::istringstream in(level->on_menukey_script);
 237     run_script(in, "OnMenuKeyScript");
 238   } else {
 239     toggle_pause();
 240   }
 241 }
 242
 243 void
 244 GameSession::toggle_pause()
 245 {
 246   // pause
 247   if(!game_pause) {
 248     speed_before_pause = g_screen_manager->get_speed();
 249     g_screen_manager->set_speed(0);
 250     MenuManager::instance().set_current(game_menu.get());
 251     game_menu->set_active_item(MNID_CONTINUE);
 252     game_pause = true;
 253   }
 254
 255   // unpause is done in update() after the menu is processed
 256 }
 257
 258 void
 259 GameSession::abort_level()
 260 {
 261   MenuManager::instance().set_current(0);
 262   g_screen_manager->exit_screen();
 263   currentsector->player->set_bonus(bonus_at_start);
 264   PlayerStatus *currentStatus = get_player_status();
 265   currentStatus->coins = coins_at_start;
 266   currentStatus->max_fire_bullets = max_fire_bullets_at_start;
 267   currentStatus->max_ice_bullets = max_ice_bullets_at_start;
 268 }
 269
 270 void
 271 GameSession::set_editmode(bool edit_mode)
 272 {
 273   if (this->edit_mode == edit_mode) return;
 274   this->edit_mode = edit_mode;
 275
 276   currentsector->get_players()[0]->set_edit_mode(edit_mode);
 277
 278   if (edit_mode) {
 279
 280     // entering edit mode
 281
 282   } else {
 283
 284     // leaving edit mode
 285     restart_level();
 286
 287   }
 288 }
 289
 290 void
 291 GameSession::force_ghost_mode()
 292 {
 293   currentsector->get_players()[0]->set_ghost_mode(true);
 294 }
 295
 296 HSQUIRRELVM
 297 GameSession::run_script(std::istream& in, const std::string& sourcename)
 298 {
 299   using namespace scripting;
 300
 301   // garbage collect thread list
 302   for(ScriptList::iterator i = scripts.begin();
 303       i != scripts.end(); ) {
 304     HSQOBJECT& object = *i;
 305     HSQUIRRELVM vm = object_to_vm(object);
 306
 307     if(sq_getvmstate(vm) != SQ_VMSTATE_SUSPENDED) {
 308       sq_release(global_vm, &object);
 309       i = scripts.erase(i);
 310       continue;
 311     }
 312
 313     ++i;
 314   }
 315
 316   HSQOBJECT object = create_thread(global_vm);
 317   scripts.push_back(object);
 318
 319   HSQUIRRELVM vm = object_to_vm(object);
 320
 321   compile_and_run(vm, in, sourcename);
 322
 323   return vm;
 324 }
 325
 326 void
 327 GameSession::process_events()
 328 {
 329   // end of pause mode?
 330   // XXX this looks like a fail-safe to unpause the game if there's no menu
 331   // XXX having it enabled causes some unexpected problems
 332   // XXX hopefully disabling it won't...
 333   /*
 334     if(!Menu::current() && game_pause) {
 335     game_pause = false;
 336     }
 337   */
 338
 339   // playback a demo?
 340   if(playback_demo_stream != 0) {
 341     demo_controller->update();
 342     char left = false;
 343     char right = false;
 344     char up = false;
 345     char down = false;
 346     char jump = false;
 347     char action = false;
 348     playback_demo_stream->get(left);
 349     playback_demo_stream->get(right);
 350     playback_demo_stream->get(up);
 351     playback_demo_stream->get(down);
 352     playback_demo_stream->get(jump);
 353     playback_demo_stream->get(action);
 354     demo_controller->press(Controller::LEFT, left);
 355     demo_controller->press(Controller::RIGHT, right);
 356     demo_controller->press(Controller::UP, up);
 357     demo_controller->press(Controller::DOWN, down);
 358     demo_controller->press(Controller::JUMP, jump);
 359     demo_controller->press(Controller::ACTION, action);
 360   }
 361
 362   // save input for demo?
 363   if(capture_demo_stream != 0) {
 364     Controller *controller = g_input_manager->get_controller();
 365     capture_demo_stream ->put(controller->hold(Controller::LEFT));
 366     capture_demo_stream ->put(controller->hold(Controller::RIGHT));
 367     capture_demo_stream ->put(controller->hold(Controller::UP));
 368     capture_demo_stream ->put(controller->hold(Controller::DOWN));
 369     capture_demo_stream ->put(controller->hold(Controller::JUMP));
 370     capture_demo_stream ->put(controller->hold(Controller::ACTION));
 371   }
 372 }
 373
 374 void
 375 GameSession::check_end_conditions()
 376 {
 377   Player* tux = currentsector->player;
 378
 379   /* End of level? */
 380   if(end_sequence && end_sequence->is_done()) {
 381     finish(true);
 382   } else if (!end_sequence && tux->is_dead()) {
 383     restart_level();
 384   }
 385 }
 386
 387 void
 388 GameSession::draw(DrawingContext& context)
 389 {
 390   currentsector->draw(context);
 391   drawstatus(context);
 392
 393   if(game_pause)
 394     draw_pause(context);
 395 }
 396
 397 void
 398 GameSession::draw_pause(DrawingContext& context)
 399 {
 400   context.draw_filled_rect(
 401     Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 402     Color(0.0f, 0.0f, 0.0f, .25f), LAYER_FOREGROUND1);
 403 }
 404
 405 void
 406 GameSession::setup()
 407 {
 408   if (currentsector == NULL)
 409     return;
 410
 411   if(currentsector != Sector::current()) {
 412     currentsector->activate(currentsector->player->get_pos());
 413   }
 414   currentsector->play_music(LEVEL_MUSIC);
 415
 416   int total_stats_to_be_collected = level->stats.total_coins + level->stats.total_badguys + level->stats.total_secrets;
 417   if ((!levelintro_shown) && (total_stats_to_be_collected > 0)) {
 418     levelintro_shown = true;
 419     g_screen_manager->push_screen(new LevelIntro(level.get(), best_level_statistics));
 420   }
 421 }
 422
 423 void
 424 GameSession::update(float elapsed_time)
 425 {
 426   // handle controller
 427   if(g_input_manager->get_controller()->pressed(Controller::PAUSE_MENU))
 428     on_escape_press();
 429
 430   process_events();
 431   Menu* menu = MenuManager::instance().current();
 432   if (menu && menu == game_menu.get())
 433   {
 434     menu->check_menu();
 435   }
 436
 437   // Unpause the game if the menu has been closed
 438   if (game_pause && !MenuManager::instance().current()) {
 439     g_screen_manager->set_speed(speed_before_pause);
 440     game_pause = false;
 441   }
 442
 443   check_end_conditions();
 444
 445   // respawning in new sector?
 446   if(newsector != "" && newspawnpoint != "") {
 447     Sector* sector = level->get_sector(newsector);
 448     if(sector == 0) {
 449       log_warning << "Sector '" << newsector << "' not found" << std::endl;
 450       sector = level->get_sector("main");
 451     }
 452     sector->activate(newspawnpoint);
 453     sector->play_music(LEVEL_MUSIC);
 454     currentsector = sector;
 455     //Keep persistent across sectors
 456     if(edit_mode)
 457       currentsector->get_players()[0]->set_edit_mode(edit_mode);
 458     newsector = "";
 459     newspawnpoint = "";
 460   }
 461
 462   // Update the world state and all objects in the world
 463   if(!game_pause) {
 464     // Update the world
 465     if (!end_sequence) {
 466       play_time += elapsed_time; //TODO: make sure we don't count cutscene time
 467       level->stats.time = play_time;
 468       currentsector->update(elapsed_time);
 469     } else {
 470       if (!end_sequence->is_tux_stopped()) {
 471         currentsector->update(elapsed_time);
 472       } else {
 473         end_sequence->update(elapsed_time);
 474       }
 475     }
 476   }
 477
 478   // update sounds
 479   if (currentsector && currentsector->camera) sound_manager->set_listener_position(currentsector->camera->get_center());
 480
 481   /* Handle music: */
 482   if (end_sequence)
 483     return;
 484
 485   if(currentsector->player->invincible_timer.started()) {
 486     if(currentsector->player->invincible_timer.get_timeleft() <=
 487        TUX_INVINCIBLE_TIME_WARNING) {
 488       currentsector->play_music(HERRING_WARNING_MUSIC);
 489     } else {
 490       currentsector->play_music(HERRING_MUSIC);
 491     }
 492   } else if(currentsector->get_music_type() != LEVEL_MUSIC) {
 493     currentsector->play_music(LEVEL_MUSIC);
 494   }
 495 }
 496
 497 void
 498 GameSession::finish(bool win)
 499 {
 500   using namespace worldmap;
 501
 502   if (edit_mode) {
 503     force_ghost_mode();
 504     return;
 505   }
 506
 507   if(win) {
 508     if(WorldMap::current())
 509       WorldMap::current()->finished_level(level.get());
 510   }
 511
 512   g_screen_manager->exit_screen();
 513 }
 514
 515 void
 516 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 517 {
 518   newsector = sector;
 519   newspawnpoint = spawnpoint;
 520 }
 521
 522 void
 523 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 524 {
 525   reset_sector = sector;
 526   reset_pos = pos;
 527 }
 528
 529 std::string
 530 GameSession::get_working_directory()
 531 {
 532   return FileSystem::dirname(levelfile);
 533 }
 534
 535 void
 536 GameSession::start_sequence(const std::string& sequencename)
 537 {
 538   // do not play sequences when in edit mode
 539   if (edit_mode) {
 540     force_ghost_mode();
 541     return;
 542   }
 543
 544   // handle special "stoptux" sequence
 545   if (sequencename == "stoptux") {
 546     if (!end_sequence) {
 547       log_warning << "Final target reached without an active end sequence" << std::endl;
 548       this->start_sequence("endsequence");
 549     }
 550     if (end_sequence) end_sequence->stop_tux();
 551     return;
 552   }
 553
 554   // abort if a sequence is already playing
 555   if (end_sequence)
 556     return;
 557
 558   if (sequencename == "endsequence") {
 559     if (currentsector->get_players()[0]->get_physic().get_velocity_x() < 0) {
 560       end_sequence = new EndSequenceWalkLeft();
 561     } else {
 562       end_sequence = new EndSequenceWalkRight();
 563     }
 564   } else if (sequencename == "fireworks") {
 565     end_sequence = new EndSequenceFireworks();
 566   } else {
 567     log_warning << "Unknown sequence '" << sequencename << "'. Ignoring." << std::endl;
 568     return;
 569   }
 570
 571   /* slow down the game for end-sequence */
 572   g_screen_manager->set_speed(0.5f);
 573
 574   currentsector->add_object(end_sequence);
 575   end_sequence->start();
 576
 577   sound_manager->play_music("music/leveldone.ogg", false);
 578   currentsector->player->set_winning();
 579
 580   // Stop all clocks.
 581   for(std::vector<GameObject*>::iterator i = currentsector->gameobjects.begin();
 582       i != currentsector->gameobjects.end(); ++i)
 583   {
 584     GameObject* obj = *i;
 585
 586     LevelTime* lt = dynamic_cast<LevelTime*> (obj);
 587     if(lt)
 588       lt->stop();
 589   }
 590 }
 591
 592 /* (Status): */
 593 void
 594 GameSession::drawstatus(DrawingContext& context)
 595 {
 596   player_status->draw(context);
 597
 598   // draw level stats while end_sequence is running
 599   if (end_sequence) {
 600     level->stats.draw_endseq_panel(context, best_level_statistics, statistics_backdrop);
 601   }
 602 }
 603
 604 /* EOF */