src/gameloop.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2000 Bill Kendrick <bill@newbreedsoftware.com>
   5 //  Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
   6 //  Copyright (C) 2004 Ingo Ruhnke <grumbel@gmx.de>
   7 //
   8 //  This program is free software; you can redistribute it and/or
   9 //  modify it under the terms of the GNU General Public License
  10 //  as published by the Free Software Foundation; either version 2
  11 //  of the License, or (at your option) any later version.
  12 //
  13 //  This program is distributed in the hope that it will be useful,
  14 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 //  GNU General Public License for more details.
  17 //
  18 //  You should have received a copy of the GNU General Public License
  19 //  along with this program; if not, write to the Free Software
  20 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21
  22 #include <iostream>
  23 #include <sstream>
  24 #include <cassert>
  25 #include <cstdio>
  26 #include <cstdlib>
  27 #include <cmath>
  28 #include <cstring>
  29 #include <cerrno>
  30 #include <unistd.h>
  31 #include <ctime>
  32
  33 #include "SDL.h"
  34
  35 #ifndef WIN32
  36 #include <sys/types.h>
  37 #include <ctype.h>
  38 #endif
  39
  40 #include "defines.h"
  41 #include "app/globals.h"
  42 #include "gameloop.h"
  43 #include "video/screen.h"
  44 #include "app/setup.h"
  45 #include "high_scores.h"
  46 #include "gui/menu.h"
  47 #include "badguy.h"
  48 #include "sector.h"
  49 #include "special.h"
  50 #include "player.h"
  51 #include "level.h"
  52 #include "scene.h"
  53 #include "collision.h"
  54 #include "tile.h"
  55 #include "particlesystem.h"
  56 #include "resources.h"
  57 #include "background.h"
  58 #include "tilemap.h"
  59 #include "app/gettext.h"
  60 #include "worldmap.h"
  61 #include "intro.h"
  62 #include "misc.h"
  63 #include "camera.h"
  64 #include "statistics.h"
  65
  66 GameSession* GameSession::current_ = 0;
  67
  68 bool compare_last(std::string& haystack, std::string needle)
  69 {
  70 int haystack_size = haystack.size();
  71 int needle_size = needle.size();
  72
  73 if(haystack_size < needle_size)
  74   return false;
  75
  76 if(haystack.compare(haystack_size-needle_size, needle_size, needle) == 0)
  77   return true;
  78 return false;
  79 }
  80
  81 GameSession::GameSession(const std::string& levelname_, int mode, bool flip_level_, Statistics* statistics)
  82   : level(0), currentsector(0), st_gl_mode(mode),
  83     end_sequence(NO_ENDSEQUENCE), levelname(levelname_), flip_level(flip_level_),
  84     best_level_statistics(statistics)
  85 {
  86   current_ = this;
  87
  88   global_frame_counter = 0;
  89   game_pause = false;
  90   fps_fps = 0;
  91
  92   fps_timer.init(true);
  93   frame_timer.init(true);
  94   random_timer.init(true);
  95   frame_rate.set_fps(100);
  96
  97   context = new DrawingContext();
  98
  99   if(flip_levels_mode)
 100     flip_level = true;
 101
 102   last_swap_point = Vector(-1, -1);
 103   last_swap_stats.reset();
 104
 105   restart_level();
 106 }
 107
 108 void
 109 GameSession::restart_level()
 110 {
 111   game_pause   = false;
 112   exit_status  = ES_NONE;
 113   end_sequence = NO_ENDSEQUENCE;
 114
 115   fps_timer.init(true);
 116   frame_timer.init(true);
 117   random_timer.init(true);
 118
 119   last_keys.clear();
 120
 121   Vector tux_pos = Vector(-1,-1);
 122   if (currentsector)
 123     { // Tux has lost a life, so we try to respawn him at the nearest reset point
 124       tux_pos = currentsector->player->base;
 125     }
 126
 127   delete level;
 128   currentsector = 0;
 129
 130   level = new Level;
 131   level->load(levelname);
 132   if(flip_level)
 133     level->do_vertical_flip();
 134
 135   global_stats.reset();
 136   global_stats.set_total_points(COINS_COLLECTED_STAT, level->get_total_coins());
 137   global_stats.set_total_points(BADGUYS_KILLED_STAT, level->get_total_badguys());
 138   global_stats.set_total_points(TIME_NEEDED_STAT, level->time_left);
 139
 140   currentsector = level->get_sector("main");
 141   if(!currentsector)
 142     Termination::abort("Level has no main sector.", "");
 143   currentsector->activate("main");
 144
 145   // Set Tux to the nearest reset point
 146   if(tux_pos.x != -1)
 147     {
 148     tux_pos = currentsector->get_best_spawn_point(tux_pos);
 149
 150     if(last_swap_point.x > tux_pos.x)
 151       tux_pos = last_swap_point;
 152     else  // new swap point
 153       {
 154       last_swap_point = tux_pos;
 155
 156       last_swap_stats += global_stats;
 157       }
 158
 159     currentsector->player->base.x = tux_pos.x;
 160     currentsector->player->base.y = tux_pos.y;
 161
 162     // has to reset camera on swapping
 163     currentsector->camera->reset(Vector(currentsector->player->base.x,
 164                                         currentsector->player->base.y));
 165     }
 166
 167   if (st_gl_mode != ST_GL_DEMO_GAME)
 168     {
 169       if(st_gl_mode == ST_GL_PLAY || st_gl_mode == ST_GL_LOAD_LEVEL_FILE)
 170         levelintro();
 171     }
 172
 173   time_left.init(true);
 174   start_timers();
 175   currentsector->play_music(LEVEL_MUSIC);
 176 }
 177
 178 GameSession::~GameSession()
 179 {
 180   delete level;
 181   delete context;
 182 }
 183
 184 void
 185 GameSession::levelintro(void)
 186 {
 187   SoundManager::get()->halt_music();
 188
 189   char str[60];
 190
 191   DrawingContext context;
 192   currentsector->background->draw(context);
 193
 194   context.draw_text(gold_text, level->get_name(), Vector(screen->w/2, 160),
 195       CENTER_ALLIGN, LAYER_FOREGROUND1);
 196
 197   sprintf(str, "TUX x %d", player_status.lives);
 198   context.draw_text(white_text, str, Vector(screen->w/2, 210),
 199       CENTER_ALLIGN, LAYER_FOREGROUND1);
 200
 201   if(level->get_author().size())
 202     context.draw_text(white_small_text,
 203       std::string(_("by ")) + level->get_author(),
 204       Vector(screen->w/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 205
 206
 207   if(flip_level)
 208     context.draw_text(white_text,
 209       _("Level Vertically Flipped!"),
 210       Vector(screen->w/2, 310), CENTER_ALLIGN, LAYER_FOREGROUND1);
 211
 212   if(best_level_statistics != NULL)
 213     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 214
 215   context.do_drawing();
 216
 217   SDL_Event event;
 218   wait_for_event(event,1000,3000,true);
 219 }
 220
 221 /* Reset Timers */
 222 void
 223 GameSession::start_timers()
 224 {
 225   time_left.start(level->time_left*1000);
 226   Ticks::pause_init();
 227   frame_rate.start();
 228 }
 229
 230 void
 231 GameSession::on_escape_press()
 232 {
 233   if(currentsector->player->dying || end_sequence != NO_ENDSEQUENCE)
 234     return;   // don't let the player open the menu, when he is dying
 235
 236   if(game_pause)
 237     return;
 238
 239   if(st_gl_mode == ST_GL_TEST)
 240     {
 241       exit_status = ES_LEVEL_ABORT;
 242     }
 243   else if (!Menu::current())
 244     {
 245       /* Tell Tux that the keys are all down, otherwise
 246         it could have nasty bugs, like going allways to the right
 247         or whatever that key does */
 248       Player& tux = *(currentsector->player);
 249       tux.key_event((SDLKey)keymap.jump, UP);
 250       tux.key_event((SDLKey)keymap.duck, UP);
 251       tux.key_event((SDLKey)keymap.left, UP);
 252       tux.key_event((SDLKey)keymap.right, UP);
 253       tux.key_event((SDLKey)keymap.fire, UP);
 254
 255       Menu::set_current(game_menu);
 256       Ticks::pause_start();
 257     }
 258 }
 259
 260 void
 261 GameSession::process_events()
 262 {
 263   if (end_sequence != NO_ENDSEQUENCE)
 264     {
 265       Player& tux = *currentsector->player;
 266
 267       tux.input.fire  = UP;
 268       tux.input.left  = UP;
 269       tux.input.right = DOWN;
 270       tux.input.down  = UP;
 271
 272       if (int(last_x_pos) == int(tux.base.x))
 273         tux.input.up    = DOWN;
 274       else
 275         tux.input.up    = UP;
 276
 277       last_x_pos = tux.base.x;
 278
 279       SDL_Event event;
 280       while (SDL_PollEvent(&event))
 281         {
 282           /* Check for menu-events, if the menu is shown */
 283           if (Menu::current())
 284             {
 285               Menu::current()->event(event);
 286               if(!Menu::current())
 287               Ticks::pause_stop();
 288             }
 289
 290           switch(event.type)
 291             {
 292             case SDL_QUIT:        /* Quit event - quit: */
 293               Termination::abort("Received window close", "");
 294               break;
 295
 296             case SDL_KEYDOWN:     /* A keypress! */
 297               {
 298                 SDLKey key = event.key.keysym.sym;
 299
 300                 switch(key)
 301                   {
 302                   case SDLK_ESCAPE:    /* Escape: Open/Close the menu: */
 303                     on_escape_press();
 304                     break;
 305                   default:
 306                     break;
 307                   }
 308               }
 309
 310             case SDL_JOYBUTTONDOWN:
 311               if (event.jbutton.button == joystick_keymap.start_button)
 312                 on_escape_press();
 313               break;
 314             }
 315         }
 316     }
 317   else // normal mode
 318     {
 319       if(!Menu::current() && !game_pause)
 320         Ticks::pause_stop();
 321
 322       SDL_Event event;
 323       while (SDL_PollEvent(&event))
 324         {
 325           /* Check for menu-events, if the menu is shown */
 326           if (Menu::current())
 327             {
 328               Menu::current()->event(event);
 329               if(!Menu::current())
 330                 Ticks::pause_stop();
 331             }
 332           else
 333             {
 334               Player& tux = *currentsector->player;
 335
 336               switch(event.type)
 337                 {
 338                 case SDL_QUIT:        /* Quit event - quit: */
 339                   Termination::abort("Received window close", "");
 340                   break;
 341
 342                 case SDL_KEYDOWN:     /* A keypress! */
 343                   {
 344                     SDLKey key = event.key.keysym.sym;
 345
 346                     if(tux.key_event(key,DOWN))
 347                       break;
 348
 349                     switch(key)
 350                       {
 351                       case SDLK_ESCAPE:    /* Escape: Open/Close the menu: */
 352                         on_escape_press();
 353                         break;
 354                       default:
 355                         break;
 356                       }
 357                   }
 358                   break;
 359                 case SDL_KEYUP:      /* A keyrelease! */
 360                   {
 361                     SDLKey key = event.key.keysym.sym;
 362
 363                     if(tux.key_event(key, UP))
 364                       break;
 365
 366                     switch(key)
 367                       {
 368                       case SDLK_a:
 369                         if(debug_mode)
 370                         {
 371                           char buf[160];
 372                           snprintf(buf, sizeof(buf), "P: %4.1f,%4.1f",
 373                               tux.base.x, tux.base.y);
 374                           context->draw_text(white_text, buf,
 375                               Vector(0, screen->h - white_text->get_height()),
 376                               LEFT_ALLIGN, LAYER_FOREGROUND1);
 377                           context->do_drawing();
 378                           SDL_Delay(1000);
 379                         }
 380                         break;
 381                       case SDLK_p:
 382                         if(!Menu::current())
 383                           {
 384                           // "lifeup" cheat activates pause cause of the 'p'
 385                           // so work around to ignore it
 386                             if(compare_last(last_keys, "lifeu"))
 387                               break;
 388
 389                             if(game_pause)
 390                               {
 391                                 game_pause = false;
 392                                 Ticks::pause_stop();
 393                               }
 394                             else
 395                               {
 396                                 game_pause = true;
 397                                 Ticks::pause_start();
 398                               }
 399                           }
 400                         break;
 401                       default:
 402                         break;
 403                       }
 404                   }
 405
 406                         /* Check if chacrater is ASCII */
 407                         char ch[2];
 408                         if((event.key.keysym.unicode & 0xFF80) == 0)
 409                           {
 410                           ch[0] = event.key.keysym.unicode & 0x7F;
 411                           ch[1] = '\0';
 412                           }
 413                         last_keys.append(ch);  // add to cheat keys
 414
 415                         // Cheating words (the goal of this is really for debugging,
 416                         // but could be used for some cheating, nothing wrong with that)
 417                         if(compare_last(last_keys, "grow"))
 418                           {
 419                           tux.grow(false);
 420                           last_keys.clear();
 421                           }
 422                         if(compare_last(last_keys, "fire"))
 423                           {
 424                           tux.grow(false);
 425                           tux.got_power = tux.FIRE_POWER;
 426                           last_keys.clear();
 427                           }
 428                         if(compare_last(last_keys, "ice"))
 429                           {
 430                           tux.grow(false);
 431                           tux.got_power = tux.ICE_POWER;
 432                           last_keys.clear();
 433                           }
 434                         if(compare_last(last_keys, "lifeup"))
 435                           {
 436                           player_status.lives++;
 437                           last_keys.clear();
 438                           }
 439                         if(compare_last(last_keys, "lifedown"))
 440                           {
 441                           player_status.lives--;
 442                           last_keys.clear();
 443                           }
 444                         if(compare_last(last_keys, "invincible"))
 445                           {    // be invincle for the rest of the level
 446                           tux.invincible_timer.start(time_left.get_left());
 447                           last_keys.clear();
 448                           }
 449                         if(compare_last(last_keys, "shrink"))
 450                           {    // remove powerups
 451                           tux.kill(tux.SHRINK);
 452                           last_keys.clear();
 453                           }
 454                         if(compare_last(last_keys, "kill"))
 455                           {    // kill Tux, but without losing a life
 456                           player_status.lives++;
 457                           tux.kill(tux.KILL);
 458                           last_keys.clear();
 459                           }
 460                         if(compare_last(last_keys, "hover"))
 461                           {    // toggle hover ability on/off
 462                           tux.enable_hover = !tux.enable_hover;
 463                           last_keys.clear();
 464                           }
 465                         if(compare_last(last_keys, "gotoend"))
 466                           {    // goes to the end of the level
 467                           tux.base.x = (currentsector->solids->get_width()*32) - (screen->w*2);
 468                           tux.base.y = 0;
 469                           currentsector->camera->reset(Vector(tux.base.x, tux.base.y));
 470                           last_keys.clear();
 471                           }
 472                   break;
 473
 474                 case SDL_JOYAXISMOTION:
 475                   if (event.jaxis.axis == joystick_keymap.x_axis)
 476                     {
 477                       if (event.jaxis.value < -joystick_keymap.dead_zone)
 478                         {
 479                           tux.input.left  = DOWN;
 480                           tux.input.right = UP;
 481                         }
 482                       else if (event.jaxis.value > joystick_keymap.dead_zone)
 483                         {
 484                           tux.input.left  = UP;
 485                           tux.input.right = DOWN;
 486                         }
 487                       else
 488                         {
 489                           tux.input.left  = DOWN;
 490                           tux.input.right = DOWN;
 491                         }
 492                     }
 493                   else if (event.jaxis.axis == joystick_keymap.y_axis)
 494                     {
 495                       if (event.jaxis.value > joystick_keymap.dead_zone)
 496                         tux.input.down = DOWN;
 497                       else if (event.jaxis.value < -joystick_keymap.dead_zone)
 498                         tux.input.down = UP;
 499                       else
 500                         tux.input.down = UP;
 501                     }
 502                   break;
 503
 504                 case SDL_JOYHATMOTION:
 505                   if(event.jhat.value & SDL_HAT_UP) {
 506                     tux.input.up = DOWN;
 507                     tux.input.down = UP;
 508                   } else if(event.jhat.value & SDL_HAT_DOWN) {
 509                     tux.input.up = UP;
 510                     tux.input.down = DOWN;
 511                   } else if(event.jhat.value & SDL_HAT_LEFT) {
 512                     tux.input.left = DOWN;
 513                     tux.input.right = UP;
 514                   } else if(event.jhat.value & SDL_HAT_RIGHT) {
 515                     tux.input.left = UP;
 516                     tux.input.right = DOWN;
 517                   } else if(event.jhat.value == SDL_HAT_CENTERED) {
 518                     tux.input.left = UP;
 519                     tux.input.right = UP;
 520                     tux.input.up = UP;
 521                     tux.input.down = UP;
 522                   }
 523                   break;
 524
 525                 case SDL_JOYBUTTONDOWN:
 526                   if (event.jbutton.button == joystick_keymap.a_button)
 527                     tux.input.up = DOWN;
 528                   else if (event.jbutton.button == joystick_keymap.b_button)
 529                     tux.input.fire = DOWN;
 530                   else if (event.jbutton.button == joystick_keymap.start_button)
 531                     on_escape_press();
 532                   break;
 533                 case SDL_JOYBUTTONUP:
 534                   if (event.jbutton.button == joystick_keymap.a_button)
 535                     tux.input.up = UP;
 536                   else if (event.jbutton.button == joystick_keymap.b_button)
 537                     tux.input.fire = UP;
 538                   break;
 539
 540                 default:
 541                   break;
 542                 }  /* switch */
 543             }
 544         } /* while */
 545     }
 546 }
 547
 548 void
 549 GameSession::check_end_conditions()
 550 {
 551   Player* tux = currentsector->player;
 552
 553   /* End of level? */
 554   Tile* endtile = collision_goal(tux->base);
 555
 556   if(end_sequence && !endsequence_timer.check())
 557     {
 558       exit_status = ES_LEVEL_FINISHED;
 559       global_stats += last_swap_stats;  // add swap points stats
 560       return;
 561     }
 562   else if(end_sequence == ENDSEQUENCE_RUNNING && endtile && endtile->data >= 1)
 563     {
 564       end_sequence = ENDSEQUENCE_WAITING;
 565     }
 566   else if(!end_sequence && endtile && endtile->data == 0)
 567     {
 568       end_sequence = ENDSEQUENCE_RUNNING;
 569       endsequence_timer.start(7000); // 5 seconds until we finish the map
 570       last_x_pos = -1;
 571       SoundManager::get()->play_music(level_end_song, 0);
 572       tux->invincible_timer.start(7000); //FIXME: Implement a winning timer for the end sequence (with special winning animation etc.)
 573
 574       // add left time to stats
 575       global_stats.set_points(TIME_NEEDED_STAT, time_left.get_gone() / 1000);
 576
 577       random_timer.start(200);  // start 1st firework
 578     }
 579   else if (!end_sequence && tux->is_dead())
 580     {
 581       player_status.bonus = PlayerStatus::NO_BONUS;
 582
 583       if (player_status.lives < 0)
 584         { // No more lives!?
 585           exit_status = ES_GAME_OVER;
 586         }
 587       else
 588         { // Still has lives, so reset Tux to the levelstart
 589           restart_level();
 590         }
 591
 592       return;
 593     }
 594 }
 595
 596 void
 597 GameSession::action(double frame_ratio)
 598 {
 599   if (exit_status == ES_NONE && !currentsector->player->growing_timer.check())
 600     {
 601       // Update Tux and the World
 602       currentsector->action(frame_ratio);
 603     }
 604
 605   // respawning in new sector?
 606   if(newsector != "" && newspawnpoint != "") {
 607     Sector* sector = level->get_sector(newsector);
 608     currentsector = sector;
 609     currentsector->activate(newspawnpoint);
 610     currentsector->play_music(LEVEL_MUSIC);
 611     newsector = newspawnpoint = "";
 612   }
 613
 614   // on end sequence make a few fireworks
 615   if(end_sequence == ENDSEQUENCE_RUNNING && !random_timer.check() &&
 616      currentsector->end_sequence_animation() == FIREWORKS_ENDSEQ_ANIM)
 617     {
 618     Vector epicenter = currentsector->camera->get_translation();
 619     epicenter.x += screen->w * ((float)rand() / RAND_MAX);
 620     epicenter.y += (screen->h/2) * ((float)rand() / RAND_MAX);
 621
 622     int red = rand() % 255;  // calculate firework color
 623     int green = rand() % red;
 624     currentsector->add_particles(epicenter, Vector(1.4,1.4), Vector(0,0),
 625                                  45, Color(red,green,0), 3, 1300);
 626
 627     SoundManager::get()->play_sound(IDToSound(SND_FIREWORKS));
 628     random_timer.start(rand() % 400 + 600);  // next firework
 629     }
 630 }
 631
 632 void
 633 GameSession::draw()
 634 {
 635   currentsector->draw(*context);
 636   drawstatus(*context);
 637
 638   if(game_pause)
 639     {
 640       int x = screen->h / 20;
 641       for(int i = 0; i < x; ++i)
 642         {
 643           context->draw_filled_rect(
 644               Vector(i % 2 ? (pause_menu_frame * i)%screen->w :
 645                 -((pause_menu_frame * i)%screen->w)
 646                 ,(i*20+pause_menu_frame)%screen->h),
 647               Vector(screen->w,10),
 648               Color(20,20,20, rand() % 20 + 1), LAYER_FOREGROUND1+1);
 649         }
 650       context->draw_filled_rect(
 651           Vector(0,0), Vector(screen->w, screen->h),
 652           Color(rand() % 50, rand() % 50, rand() % 50, 128), LAYER_FOREGROUND1);
 653       context->draw_text(blue_text, _("PAUSE - Press 'P' To Play"),
 654           Vector(screen->w/2, 230), CENTER_ALLIGN, LAYER_FOREGROUND1+2);
 655
 656       char str1[60];
 657       char str2[124];
 658       sprintf(str1, _("Playing: "));
 659       sprintf(str2, level->name.c_str());
 660
 661       context->draw_text(blue_text, str1,
 662           Vector((screen->w - (blue_text->get_text_width(str1) + white_text->get_text_width(str2)))/2, 340),
 663           LEFT_ALLIGN, LAYER_FOREGROUND1+2);
 664       context->draw_text(white_text, str2,
 665           Vector(((screen->w - (blue_text->get_text_width(str1) + white_text->get_text_width(str2)))/2)+blue_text->get_text_width(str1), 340),
 666           LEFT_ALLIGN, LAYER_FOREGROUND1+2);
 667     }
 668
 669   if(Menu::current())
 670     {
 671       Menu::current()->draw(*context);
 672       mouse_cursor->draw(*context);
 673     }
 674
 675   context->do_drawing();
 676 }
 677
 678 void
 679 GameSession::process_menu()
 680 {
 681   Menu* menu = Menu::current();
 682   if(menu)
 683     {
 684       menu->action();
 685
 686       if(menu == game_menu)
 687         {
 688           switch (game_menu->check())
 689             {
 690             case MNID_CONTINUE:
 691               Ticks::pause_stop();
 692               break;
 693             case MNID_ABORTLEVEL:
 694               Ticks::pause_stop();
 695               exit_status = ES_LEVEL_ABORT;
 696               break;
 697             }
 698         }
 699       else if(menu == options_menu)
 700         {
 701           process_options_menu();
 702         }
 703       else if(menu == load_game_menu )
 704         {
 705           process_load_game_menu();
 706         }
 707     }
 708 }
 709
 710 GameSession::ExitStatus
 711 GameSession::run()
 712 {
 713   Menu::set_current(0);
 714   current_ = this;
 715
 716   int fps_cnt = 0;
 717
 718   frame_rate.start();
 719
 720   // Eat unneeded events
 721   SDL_Event event;
 722   while (SDL_PollEvent(&event)) {}
 723
 724   draw();
 725
 726   while (exit_status == ES_NONE)
 727     {
 728       /* Calculate the movement-factor */
 729       double frame_ratio = frame_rate.get();
 730
 731       if(!frame_timer.check())
 732         {
 733           frame_timer.start(25);
 734           ++global_frame_counter;
 735         }
 736
 737       /* Handle events: */
 738       currentsector->player->input.old_fire
 739         = currentsector->player->input.fire;
 740
 741       process_events();
 742       process_menu();
 743
 744       // Update the world state and all objects in the world
 745       // Do that with a constante time-delta so that the game will run
 746       // determistic and not different on different machines
 747       if(!game_pause && !Menu::current())
 748         {
 749           // Update the world
 750           check_end_conditions();
 751           if (end_sequence == ENDSEQUENCE_RUNNING)
 752              action(frame_ratio/2);
 753           else if(end_sequence == NO_ENDSEQUENCE)
 754              action(frame_ratio);
 755         }
 756       else
 757         {
 758           ++pause_menu_frame;
 759           SDL_Delay(50);
 760         }
 761
 762       draw();
 763
 764       /* Time stops in pause mode */
 765       if(game_pause || Menu::current())
 766         {
 767           continue;
 768         }
 769
 770       frame_rate.update();
 771
 772       /* Handle time: */
 773       if (!time_left.check() && currentsector->player->dying == DYING_NOT
 774               && !end_sequence)
 775         currentsector->player->kill(Player::KILL);
 776
 777       /* Handle music: */
 778       if(currentsector->player->invincible_timer.check() && !end_sequence)
 779         {
 780           currentsector->play_music(HERRING_MUSIC);
 781         }
 782       /* are we low on time ? */
 783       else if (time_left.get_left() < TIME_WARNING && !end_sequence)
 784         {
 785           currentsector->play_music(HURRYUP_MUSIC);
 786         }
 787       /* or just normal music? */
 788       else if(currentsector->get_music_type() != LEVEL_MUSIC && !end_sequence)
 789         {
 790           currentsector->play_music(LEVEL_MUSIC);
 791         }
 792
 793       /* Calculate frames per second */
 794       if(show_fps)
 795         {
 796           ++fps_cnt;
 797           fps_fps = (1000.0 / (float)fps_timer.get_gone()) * (float)fps_cnt;
 798
 799           if(!fps_timer.check())
 800             {
 801               fps_timer.start(1000);
 802               fps_cnt = 0;
 803             }
 804         }
 805     }
 806
 807   return exit_status;
 808 }
 809
 810 void
 811 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 812 {
 813   newsector = sector;
 814   newspawnpoint = spawnpoint;
 815 }
 816
 817 /* Bounce a brick: */
 818 void bumpbrick(float x, float y)
 819 {
 820   Sector::current()->add_bouncy_brick(Vector(((int)(x + 1) / 32) * 32,
 821                          (int)(y / 32) * 32));
 822
 823   SoundManager::get()->play_sound(IDToSound(SND_BRICK), Vector(x, y), Sector::current()->player->get_pos());
 824 }
 825
 826 /* (Status): */
 827 void
 828 GameSession::drawstatus(DrawingContext& context)
 829 {
 830   char str[60];
 831
 832   snprintf(str, 60, " %d", global_stats.get_points(SCORE_STAT));
 833   context.draw_text(white_text, _("SCORE"), Vector(0, 0), LEFT_ALLIGN, LAYER_FOREGROUND1);
 834   context.draw_text(gold_text, str, Vector(96, 0), LEFT_ALLIGN, LAYER_FOREGROUND1);
 835
 836   if(st_gl_mode == ST_GL_TEST)
 837     {
 838       context.draw_text(white_text, _("Press ESC To Return"), Vector(0,20),
 839           LEFT_ALLIGN, LAYER_FOREGROUND1);
 840     }
 841
 842   if(!time_left.check()) {
 843     context.draw_text(white_text, _("TIME's UP"), Vector(screen->w/2, 0),
 844         CENTER_ALLIGN, LAYER_FOREGROUND1);
 845   } else if (time_left.get_left() > TIME_WARNING || (global_frame_counter % 10) < 5) {
 846     sprintf(str, " %d", time_left.get_left() / 1000 );
 847     context.draw_text(white_text, _("TIME"),
 848         Vector(screen->w/2, 0), CENTER_ALLIGN, LAYER_FOREGROUND1);
 849     context.draw_text(gold_text, str,
 850         Vector(screen->w/2 + 4*16, 0), CENTER_ALLIGN, LAYER_FOREGROUND1);
 851   }
 852
 853   sprintf(str, " %d", player_status.distros);
 854   context.draw_text(white_text, _("COINS"),
 855       Vector(screen->w - white_text->get_text_width(_("COINS"))-white_text->get_text_width("   99"), 0),
 856         LEFT_ALLIGN, LAYER_FOREGROUND1);
 857   context.draw_text(gold_text, str,
 858       Vector(screen->w - gold_text->get_text_width(" 99"), 0),LEFT_ALLIGN, LAYER_FOREGROUND1);
 859
 860   if (player_status.lives >= 5)
 861     {
 862       sprintf(str, "%dx", player_status.lives);
 863       float x = screen->w - gold_text->get_text_width(str) - tux_life->w;
 864       context.draw_text(gold_text, str, Vector(x, 20), LEFT_ALLIGN, LAYER_FOREGROUND1);
 865       context.draw_surface(tux_life, Vector(screen->w - 16, 20),
 866           LAYER_FOREGROUND1);
 867     }
 868   else
 869     {
 870       for(int i= 0; i < player_status.lives; ++i)
 871         context.draw_surface(tux_life,
 872             Vector(screen->w - tux_life->w*4 +(tux_life->w*i), 20),
 873             LAYER_FOREGROUND1);
 874     }
 875
 876   context.draw_text(white_text, _("LIVES"),
 877       Vector(screen->w - white_text->get_text_width(_("LIVES")) - white_text->get_text_width("   99"), 20),
 878       LEFT_ALLIGN, LAYER_FOREGROUND1);
 879
 880   if(show_fps)
 881     {
 882       sprintf(str, "%2.1f", fps_fps);
 883       context.draw_text(white_text, "FPS",
 884           Vector(screen->w - white_text->get_text_width("FPS     "), 40),
 885           LEFT_ALLIGN, LAYER_FOREGROUND1);
 886       context.draw_text(gold_text, str,
 887           Vector(screen->w-4*16, 40), LEFT_ALLIGN, LAYER_FOREGROUND1);
 888     }
 889 }
 890
 891 void
 892 GameSession::drawresultscreen(void)
 893 {
 894   char str[80];
 895
 896   DrawingContext context;
 897   currentsector->background->draw(context);
 898
 899   context.draw_text(blue_text, _("Result:"), Vector(screen->w/2, 200),
 900       CENTER_ALLIGN, LAYER_FOREGROUND1);
 901
 902   sprintf(str, _("SCORE: %d"), global_stats.get_points(SCORE_STAT));
 903   context.draw_text(gold_text, str, Vector(screen->w/2, 224), CENTER_ALLIGN, LAYER_FOREGROUND1);
 904
 905   sprintf(str, _("COINS: %d"), player_status.distros);
 906   context.draw_text(gold_text, str, Vector(screen->w/2, 256), CENTER_ALLIGN, LAYER_FOREGROUND1);
 907
 908   context.do_drawing();
 909
 910   SDL_Event event;
 911   wait_for_event(event,2000,5000,true);
 912 }
 913
 914 std::string slotinfo(int slot)
 915 {
 916   std::string tmp;
 917   std::string slotfile;
 918   std::string title;
 919   std::stringstream stream;
 920   stream << slot;
 921   slotfile = st_save_dir + "/slot" + stream.str() + ".stsg";
 922
 923   lisp_object_t* savegame = lisp_read_from_file(slotfile.c_str());
 924   if (savegame)
 925     {
 926       LispReader reader(lisp_cdr(savegame));
 927       reader.read_string("title", title);
 928       lisp_free(savegame);
 929     }
 930
 931   if (access(slotfile.c_str(), F_OK) == 0)
 932     {
 933       if (!title.empty())
 934         tmp = "Slot " + stream.str() + " - " + title;
 935       else
 936         tmp = "Slot " + stream.str() + " - Savegame";
 937     }
 938   else
 939     tmp = std::string(_("Slot")) + " " + stream.str() + " - " + std::string(_("Free"));
 940
 941   return tmp;
 942 }
 943
 944 bool process_load_game_menu()
 945 {
 946   int slot = load_game_menu->check();
 947
 948   if(slot != -1 && load_game_menu->get_item_by_id(slot).kind == MN_ACTION)
 949     {
 950       std::stringstream stream;
 951       stream << slot;
 952       std::string slotfile = st_save_dir + "/slot" + stream.str() + ".stsg";
 953
 954       if (access(slotfile.c_str(), F_OK) != 0)
 955         {
 956           draw_intro();
 957         }
 958
 959       // shrink_fade(Point((screen->w/2),(screen->h/2)), 1000);
 960       fadeout(256);
 961
 962       DrawingContext context;
 963       context.draw_text(white_text, "Loading...",
 964                         Vector(screen->w/2, screen->h/2), CENTER_ALLIGN, LAYER_FOREGROUND1);
 965       context.do_drawing();
 966
 967       WorldMapNS::WorldMap worldmap;
 968
 969       // Load the game or at least set the savegame_file variable
 970       worldmap.loadgame(slotfile);
 971
 972       worldmap.display();
 973
 974       Menu::set_current(main_menu);
 975
 976       Ticks::pause_stop();
 977       return true;
 978     }
 979   else
 980     {
 981       return false;
 982     }
 983 }