src/world.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
  21 //  02111-1307, USA.
  22
  23 #include <iostream>
  24 #include <math.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include "globals.h"
  28 #include "scene.h"
  29 #include "screen.h"
  30 #include "defines.h"
  31 #include "world.h"
  32 #include "level.h"
  33 #include "tile.h"
  34 #include "resources.h"
  35 #include "gameobjs.h"
  36 #include "viewport.h"
  37 #include "display_manager.h"
  38 #include "background.h"
  39 #include "tilemap.h"
  40
  41 Surface* img_distro[4];
  42
  43 World* World::current_ = 0;
  44
  45 World::World(const std::string& filename)
  46 {
  47   // FIXME: Move this to action and draw and everywhere else where the
  48   // world calls child functions
  49   current_ = this;
  50
  51   level = new Level();
  52   level->load(filename, this);
  53
  54   tux = new Player(displaymanager);
  55   gameobjects.push_back(tux);
  56
  57   set_defaults();
  58
  59   get_level()->load_gfx();
  60   // add background
  61   activate_particle_systems();
  62   background = new Background(displaymanager);
  63   if(level->img_bkgd) {
  64     background->set_image(level->img_bkgd, level->bkgd_speed);
  65   } else {
  66     background->set_gradient(level->bkgd_top, level->bkgd_bottom);
  67   }
  68   gameobjects.push_back(background);
  69
  70   // add tilemap
  71   gameobjects.push_back(new TileMap(displaymanager, get_level()));
  72   get_level()->load_song();
  73
  74   apply_bonuses();
  75
  76   scrolling_timer.init(true);
  77 }
  78
  79 World::World(const std::string& subset, int level_nr)
  80 {
  81   // FIXME: Move this to action and draw and everywhere else where the
  82   // world calls child functions
  83   current_ = this;
  84
  85   level = new Level();
  86   level->load(subset, level_nr, this);
  87
  88   tux = new Player(displaymanager);
  89   gameobjects.push_back(tux);
  90
  91   set_defaults();
  92
  93   get_level()->load_gfx();
  94   activate_particle_systems();
  95   background = new Background(displaymanager);
  96   if(level->img_bkgd) {
  97     background->set_image(level->img_bkgd, level->bkgd_speed);
  98   } else {
  99     background->set_gradient(level->bkgd_top, level->bkgd_bottom);
 100   }
 101   gameobjects.push_back(background);
 102   // add tilemap
 103   gameobjects.push_back(new TileMap(displaymanager, get_level()));
 104   get_level()->load_song();
 105
 106   apply_bonuses();
 107
 108   scrolling_timer.init(true);
 109 }
 110
 111 void
 112 World::apply_bonuses()
 113 {
 114   // Apply bonuses from former levels
 115   switch (player_status.bonus)
 116     {
 117     case PlayerStatus::NO_BONUS:
 118       break;
 119
 120     case PlayerStatus::FLOWER_BONUS:
 121       tux->got_power = Player::FIRE_POWER;  // FIXME: add ice power to here
 122       // fall through
 123
 124     case PlayerStatus::GROWUP_BONUS:
 125       tux->grow();
 126       break;
 127     }
 128 }
 129
 130 World::~World()
 131 {
 132   for (std::vector<GameObject*>::iterator i = gameobjects.begin();
 133           i != gameobjects.end(); ++i) {
 134     delete *i;
 135   }
 136
 137   delete level;
 138 }
 139
 140 void
 141 World::set_defaults()
 142 {
 143   player_status.score_multiplier = 1;
 144
 145   counting_distros = false;
 146   distro_counter = 0;
 147
 148   /* set current song/music */
 149   currentmusic = LEVEL_MUSIC;
 150 }
 151
 152 void
 153 World::add_object(GameObject* object)
 154 {
 155   // XXX hack for now until new collision code is ready
 156   BadGuy* badguy = dynamic_cast<BadGuy*> (object);
 157   if(badguy)
 158     bad_guys.push_back(badguy);
 159   Bullet* bullet = dynamic_cast<Bullet*> (object);
 160   if(bullet)
 161     bullets.push_back(bullet);
 162   Upgrade* upgrade = dynamic_cast<Upgrade*> (object);
 163   if(upgrade)
 164     upgrades.push_back(upgrade);
 165   Trampoline* trampoline = dynamic_cast<Trampoline*> (object);
 166   if(trampoline)
 167     trampolines.push_back(trampoline);
 168   FlyingPlatform* flying_platform = dynamic_cast<FlyingPlatform*> (object);
 169   if(flying_platform)
 170     flying_platforms.push_back(flying_platform);
 171
 172   gameobjects.push_back(object);
 173 }
 174
 175 void
 176 World::parse_objects(lisp_object_t* cur)
 177 {
 178   while(!lisp_nil_p(cur)) {
 179     lisp_object_t* data = lisp_car(cur);
 180     std::string object_type = lisp_symbol(lisp_car(data));
 181
 182     LispReader reader(lisp_cdr(data));
 183
 184     if(object_type == "trampoline") {
 185       add_object(new Trampoline(displaymanager, reader));
 186     }
 187     else if(object_type == "flying-platform") {
 188       add_object(new FlyingPlatform(displaymanager, reader));
 189     }
 190     else {
 191       BadGuyKind kind = badguykind_from_string(object_type);
 192       add_object(new BadGuy(displaymanager, kind, reader));
 193     }
 194
 195     cur = lisp_cdr(cur);
 196   }
 197 }
 198
 199 void
 200 World::activate_particle_systems()
 201 {
 202   if (level->particle_system == "clouds")
 203     {
 204       add_object(new CloudParticleSystem(displaymanager));
 205     }
 206   else if (level->particle_system == "snow")
 207     {
 208       add_object(new SnowParticleSystem(displaymanager));
 209     }
 210   else if (level->particle_system != "")
 211     {
 212       st_abort("unknown particle system specified in level", "");
 213     }
 214 }
 215
 216 void
 217 World::draw()
 218 {
 219   /* Draw objects */
 220   displaymanager.draw();
 221 }
 222
 223 void
 224 World::action(float elapsed_time)
 225 {
 226   /* update objects (don't use iterators here, because the list might change
 227    * during the iteration)
 228    */
 229   for(size_t i = 0; i < gameobjects.size(); ++i)
 230     gameobjects[i]->action(elapsed_time);
 231
 232   tux->check_bounds(displaymanager.get_viewport(),
 233       level->back_scrolling, (bool)level->hor_autoscroll_speed);
 234   scrolling(elapsed_time);
 235
 236   /* Handle all possible collisions. */
 237   collision_handler();
 238
 239   /** cleanup marked objects */
 240   for(std::vector<GameObject*>::iterator i = gameobjects.begin();
 241       i != gameobjects.end(); /* nothing */) {
 242     if((*i)->is_valid() == false) {
 243       Drawable* drawable = dynamic_cast<Drawable*> (*i);
 244       if(drawable)
 245         displaymanager.remove_drawable(drawable);
 246       BadGuy* badguy = dynamic_cast<BadGuy*> (*i);
 247       if(badguy) {
 248         bad_guys.erase(std::remove(bad_guys.begin(), bad_guys.end(), badguy),
 249             bad_guys.end());
 250       }
 251       Bullet* bullet = dynamic_cast<Bullet*> (*i);
 252       if(bullet) {
 253         bullets.erase(
 254             std::remove(bullets.begin(), bullets.end(), bullet),
 255             bullets.end());
 256       }
 257       Upgrade* upgrade = dynamic_cast<Upgrade*> (*i);
 258       if(upgrade) {
 259         upgrades.erase(
 260             std::remove(upgrades.begin(), upgrades.end(), upgrade),
 261             upgrades.end());
 262       }
 263       Trampoline* trampoline = dynamic_cast<Trampoline*> (*i);
 264       if(trampoline) {
 265         trampolines.erase(
 266             std::remove(trampolines.begin(), trampolines.end(), trampoline),
 267             trampolines.end());
 268       }
 269       FlyingPlatform* flying_platform= dynamic_cast<FlyingPlatform*> (*i);
 270       if(flying_platform) {
 271         flying_platforms.erase(
 272             std::remove(flying_platforms.begin(), flying_platforms.end(), flying_platform),
 273             flying_platforms.end());
 274       }
 275
 276       delete *i;
 277       i = gameobjects.erase(i);
 278     } else {
 279       ++i;
 280     }
 281   }
 282 }
 283
 284 /* the space that it takes for the screen to start scrolling, regarding */
 285 /* screen bounds (in pixels) */
 286 // should be higher than screen->w/2 (400)
 287 #define X_SPACE (500-16)
 288 // should be less than screen->h/2 (300)
 289 #define Y_SPACE 250
 290
 291 // the time it takes to move the camera (in ms)
 292 #define CHANGE_DIR_SCROLL_SPEED 2000
 293
 294 /* This functions takes cares of the scrolling */
 295 void World::scrolling(float elapsed_time)
 296 {
 297   float scroll_x = displaymanager.get_viewport().get_translation().x;
 298   float scroll_y = displaymanager.get_viewport().get_translation().y;
 299
 300   /* Y-axis scrolling */
 301
 302   float tux_pos_y = tux->base.y + (tux->base.height/2);
 303
 304   if(level->height > VISIBLE_TILES_Y-1 && !tux->dying)
 305     {
 306     if (scroll_y < tux_pos_y - (screen->h - Y_SPACE))
 307       scroll_y = tux_pos_y - (screen->h - Y_SPACE);
 308     else if (scroll_y > tux_pos_y - Y_SPACE)
 309       scroll_y = tux_pos_y - Y_SPACE;
 310     }
 311
 312   // this code prevent the screen to scroll before the start or after the level's end
 313   if(scroll_y > level->height * 32 - screen->h)
 314     scroll_y = level->height * 32 - screen->h;
 315   if(scroll_y < 0)
 316     scroll_y = 0;
 317
 318   /* X-axis scrolling */
 319
 320   /* Auto scrolling */
 321   if(level->hor_autoscroll_speed)
 322   {
 323     scroll_x += level->hor_autoscroll_speed * elapsed_time;
 324     displaymanager.get_viewport().set_translation(Vector(scroll_x, scroll_y));
 325     return;
 326   }
 327
 328
 329   /* Horizontal backscrolling */
 330   float tux_pos_x = tux->base.x + (tux->base.width/2);
 331
 332   if(tux->old_dir != tux->dir && level->back_scrolling)
 333     scrolling_timer.start(CHANGE_DIR_SCROLL_SPEED);
 334
 335   bool right = false;
 336   bool left = false;
 337   if (tux->physic.get_velocity_x() > 0)
 338     right = true;
 339   else if (tux->physic.get_velocity_x() < 0)
 340     left = true;
 341   else
 342     {
 343     if (tux->dir == RIGHT)
 344       right = true;
 345     else
 346       left = true;
 347     }
 348
 349   if(scrolling_timer.check())
 350   {
 351     float final_scroll_x;
 352     float constant1;
 353     float constant2;
 354     if (right)
 355       final_scroll_x = tux_pos_x - (screen->w - X_SPACE);
 356     else
 357       final_scroll_x = tux_pos_x - X_SPACE;
 358
 359     if((tux->physic.get_velocity_x() > 0 && tux->dir == RIGHT)
 360         || (tux->physic.get_velocity_x() < 0 && tux->dir == LEFT))
 361     {
 362       constant1 = 1.0;
 363       constant2 = .4;
 364     }
 365     else
 366     {
 367       constant1 = 0.;
 368       constant2 = 0.;
 369     }
 370
 371     float number = 2.5/(elapsed_time * CHANGE_DIR_SCROLL_SPEED/1000)*exp((CHANGE_DIR_SCROLL_SPEED-scrolling_timer.get_left())/1400.);
 372     if(left) number *= -1.;
 373
 374     scroll_x += number
 375             + constant1 * tux->physic.get_velocity_x() * elapsed_time
 376             + constant2 * tux->physic.get_acceleration_x() * elapsed_time *
 377             elapsed_time;
 378
 379     if ((right && final_scroll_x - scroll_x < 0) || (left && final_scroll_x - scroll_x > 0))
 380       scroll_x = final_scroll_x;
 381
 382   }
 383   else
 384   {
 385     if (right && scroll_x < tux_pos_x - (screen->w - X_SPACE))
 386       scroll_x = tux_pos_x - (screen->w - X_SPACE);
 387     else if (left && scroll_x > tux_pos_x - X_SPACE && level->back_scrolling)
 388       scroll_x = tux_pos_x - X_SPACE;
 389   }
 390
 391   // this code prevent the screen to scroll before the start or after the level's end
 392   if(scroll_x > level->width * 32 - screen->w)
 393     scroll_x = level->width * 32 - screen->w;
 394   if(scroll_x < 0)
 395     scroll_x = 0;
 396
 397   displaymanager.get_viewport().set_translation(Vector(scroll_x, scroll_y));
 398 }
 399
 400 void
 401 World::collision_handler()
 402 {
 403   // CO_BULLET & CO_BADGUY check
 404   for(unsigned int i = 0; i < bullets.size(); ++i)
 405     {
 406       for (BadGuys::iterator j = bad_guys.begin(); j != bad_guys.end(); ++j)
 407         {
 408           if((*j)->dying != DYING_NOT)
 409             continue;
 410
 411           if(rectcollision(bullets[i]->base, (*j)->base))
 412             {
 413               // We have detected a collision and now call the
 414               // collision functions of the collided objects.
 415               (*j)->collision(bullets[i], CO_BULLET, COLLISION_NORMAL);
 416               bullets[i]->collision(CO_BADGUY);
 417               break; // bullet is invalid now, so break
 418             }
 419         }
 420     }
 421
 422   /* CO_BADGUY & CO_BADGUY check */
 423   for (BadGuys::iterator i = bad_guys.begin(); i != bad_guys.end(); ++i)
 424     {
 425       if((*i)->dying != DYING_NOT)
 426         continue;
 427
 428       BadGuys::iterator j = i;
 429       ++j;
 430       for (; j != bad_guys.end(); ++j)
 431         {
 432           if(j == i || (*j)->dying != DYING_NOT)
 433             continue;
 434
 435           if(rectcollision((*i)->base, (*j)->base))
 436             {
 437               // We have detected a collision and now call the
 438               // collision functions of the collided objects.
 439               (*j)->collision(*i, CO_BADGUY);
 440               (*i)->collision(*j, CO_BADGUY);
 441             }
 442         }
 443     }
 444
 445   if(tux->dying != DYING_NOT) return;
 446
 447   // CO_BADGUY & CO_PLAYER check
 448   for (BadGuys::iterator i = bad_guys.begin(); i != bad_guys.end(); ++i)
 449     {
 450       if((*i)->dying != DYING_NOT)
 451         continue;
 452
 453       if(rectcollision_offset((*i)->base, tux->base, 0, 0))
 454         {
 455           // We have detected a collision and now call the collision
 456           // functions of the collided objects.
 457           if (tux->previous_base.y < tux->base.y &&
 458               tux->previous_base.y + tux->previous_base.height
 459               < (*i)->base.y + (*i)->base.height/2
 460               && !tux->invincible_timer.started())
 461             {
 462               (*i)->collision(tux, CO_PLAYER, COLLISION_SQUISH);
 463             }
 464           else
 465             {
 466               tux->collision(*i, CO_BADGUY);
 467               (*i)->collision(tux, CO_PLAYER, COLLISION_NORMAL);
 468             }
 469         }
 470     }
 471
 472   // CO_UPGRADE & CO_PLAYER check
 473   for(unsigned int i = 0; i < upgrades.size(); ++i)
 474     {
 475       if(rectcollision(upgrades[i]->base, tux->base))
 476         {
 477           // We have detected a collision and now call the collision
 478           // functions of the collided objects.
 479           upgrades[i]->collision(tux, CO_PLAYER, COLLISION_NORMAL);
 480         }
 481     }
 482
 483   // CO_TRAMPOLINE & (CO_PLAYER or CO_BADGUY)
 484   for (Trampolines::iterator i = trampolines.begin(); i != trampolines.end(); ++i)
 485   {
 486     if (rectcollision((*i)->base, tux->base))
 487     {
 488       if (tux->previous_base.y < tux->base.y &&
 489           tux->previous_base.y + tux->previous_base.height
 490           < (*i)->base.y + (*i)->base.height/2)
 491       {
 492         (*i)->collision(tux, CO_PLAYER, COLLISION_SQUISH);
 493       }
 494       else if (tux->previous_base.y <= tux->base.y)
 495       {
 496         tux->collision(*i, CO_TRAMPOLINE);
 497         (*i)->collision(tux, CO_PLAYER, COLLISION_NORMAL);
 498       }
 499     }
 500   }
 501
 502   // CO_FLYING_PLATFORM & (CO_PLAYER or CO_BADGUY)
 503   for (FlyingPlatforms::iterator i = flying_platforms.begin(); i != flying_platforms.end(); ++i)
 504   {
 505     if (rectcollision((*i)->base, tux->base))
 506     {
 507       if (tux->previous_base.y < tux->base.y &&
 508           tux->previous_base.y + tux->previous_base.height
 509           < (*i)->base.y + (*i)->base.height/2)
 510       {
 511         (*i)->collision(tux, CO_PLAYER, COLLISION_SQUISH);
 512         tux->collision(*i, CO_FLYING_PLATFORM);
 513       }
 514 /*      else if (tux->previous_base.y <= tux->base.y)
 515       {
 516       }*/
 517     }
 518   }
 519 }
 520
 521 void
 522 World::add_score(const Vector& pos, int s)
 523 {
 524   player_status.score += s;
 525
 526   add_object(new FloatingScore(displaymanager, pos, s));
 527 }
 528
 529 void
 530 World::add_bouncy_distro(const Vector& pos)
 531 {
 532   add_object(new BouncyDistro(displaymanager, pos));
 533 }
 534
 535 void
 536 World::add_broken_brick(const Vector& pos, Tile* tile)
 537 {
 538   add_broken_brick_piece(pos, Vector(-1, -4), tile);
 539   add_broken_brick_piece(pos + Vector(0, 16), Vector(-1.5, -3), tile);
 540
 541   add_broken_brick_piece(pos + Vector(16, 0), Vector(1, -4), tile);
 542   add_broken_brick_piece(pos + Vector(16, 16), Vector(1.5, -3), tile);
 543 }
 544
 545 void
 546 World::add_broken_brick_piece(const Vector& pos, const Vector& movement,
 547     Tile* tile)
 548 {
 549   add_object(new BrokenBrick(displaymanager, tile, pos, movement));
 550 }
 551
 552 void
 553 World::add_bouncy_brick(const Vector& pos)
 554 {
 555   add_object(new BouncyBrick(displaymanager, pos));
 556 }
 557
 558 BadGuy*
 559 World::add_bad_guy(float x, float y, BadGuyKind kind)
 560 {
 561   BadGuy* badguy = new BadGuy(displaymanager, kind, x, y);
 562   add_object(badguy);
 563   return badguy;
 564 }
 565
 566 void
 567 World::add_upgrade(const Vector& pos, Direction dir, UpgradeKind kind)
 568 {
 569   add_object(new Upgrade(displaymanager, pos, dir, kind));
 570 }
 571
 572 bool
 573 World::add_bullet(const Vector& pos, float xm, Direction dir)
 574 {
 575   if(tux->got_power == Player::FIRE_POWER)
 576     {
 577     if(bullets.size() > MAX_FIRE_BULLETS-1)
 578       return false;
 579     }
 580   else if(tux->got_power == Player::ICE_POWER)
 581     {
 582     if(bullets.size() > MAX_ICE_BULLETS-1)
 583       return false;
 584     }
 585
 586   Bullet* new_bullet = 0;
 587   if(tux->got_power == Player::FIRE_POWER)
 588     new_bullet = new Bullet(displaymanager, pos, xm, dir, FIRE_BULLET);
 589   else if(tux->got_power == Player::ICE_POWER)
 590     new_bullet = new Bullet(displaymanager, pos, xm, dir, ICE_BULLET);
 591   else
 592     st_abort("wrong bullet type.", "");
 593   add_object(new_bullet);
 594
 595   play_sound(sounds[SND_SHOOT], SOUND_CENTER_SPEAKER);
 596
 597   return true;
 598 }
 599
 600 void
 601 World::play_music(int musictype)
 602 {
 603   currentmusic = musictype;
 604   switch(currentmusic) {
 605     case HURRYUP_MUSIC:
 606       music_manager->play_music(get_level()->get_level_music_fast());
 607       break;
 608     case LEVEL_MUSIC:
 609       music_manager->play_music(get_level()->get_level_music());
 610       break;
 611     case HERRING_MUSIC:
 612       music_manager->play_music(herring_song);
 613       break;
 614     default:
 615       music_manager->halt_music();
 616       break;
 617   }
 618 }
 619
 620 int
 621 World::get_music_type()
 622 {
 623   return currentmusic;
 624 }
 625
 626 /* Break a brick: */
 627 bool
 628 World::trybreakbrick(float x, float y, bool small)
 629 {
 630   Level* plevel = get_level();
 631
 632   Tile* tile = gettile(x, y);
 633   if (tile->brick)
 634     {
 635       if (tile->data > 0)
 636         {
 637           /* Get a distro from it: */
 638           add_bouncy_distro(
 639               Vector(((int)(x + 1) / 32) * 32, (int)(y / 32) * 32));
 640
 641           // TODO: don't handle this in a global way but per-tile...
 642           if (!counting_distros)
 643             {
 644               counting_distros = true;
 645               distro_counter = 5;
 646             }
 647           else
 648             {
 649               distro_counter--;
 650             }
 651
 652           if (distro_counter <= 0)
 653             {
 654               counting_distros = false;
 655               plevel->change(x, y, TM_IA, tile->next_tile);
 656             }
 657
 658           play_sound(sounds[SND_DISTRO], SOUND_CENTER_SPEAKER);
 659           player_status.score = player_status.score + SCORE_DISTRO;
 660           player_status.distros++;
 661           return true;
 662         }
 663       else if (!small)
 664         {
 665           /* Get rid of it: */
 666           plevel->change(x, y, TM_IA, tile->next_tile);
 667
 668           /* Replace it with broken bits: */
 669           add_broken_brick(Vector(
 670                                  ((int)(x + 1) / 32) * 32,
 671                                  (int)(y / 32) * 32), tile);
 672
 673           /* Get some score: */
 674           play_sound(sounds[SND_BRICK], SOUND_CENTER_SPEAKER);
 675           player_status.score = player_status.score + SCORE_BRICK;
 676
 677           return true;
 678         }
 679     }
 680
 681   return false;
 682 }
 683
 684 /* Empty a box: */
 685 void
 686 World::tryemptybox(float x, float y, Direction col_side)
 687 {
 688   Tile* tile = gettile(x,y);
 689   if (!tile->fullbox)
 690     return;
 691
 692   // according to the collision side, set the upgrade direction
 693   if(col_side == LEFT)
 694     col_side = RIGHT;
 695   else
 696     col_side = LEFT;
 697
 698   int posx = ((int)(x+1) / 32) * 32;
 699   int posy = (int)(y/32) * 32 - 32;
 700   switch(tile->data)
 701     {
 702     case 1: // Box with a distro!
 703       add_bouncy_distro(Vector(posx, posy));
 704       play_sound(sounds[SND_DISTRO], SOUND_CENTER_SPEAKER);
 705       player_status.score = player_status.score + SCORE_DISTRO;
 706       player_status.distros++;
 707       break;
 708
 709     case 2: // Add a fire flower upgrade!
 710       if (tux->size == SMALL)     /* Tux is small, add mints! */
 711         add_upgrade(Vector(posx, posy), col_side, UPGRADE_GROWUP);
 712       else     /* Tux is big, add a fireflower: */
 713         add_upgrade(Vector(posx, posy), col_side, UPGRADE_FIREFLOWER);
 714       play_sound(sounds[SND_UPGRADE], SOUND_CENTER_SPEAKER);
 715       break;
 716
 717     case 5: // Add an ice flower upgrade!
 718       if (tux->size == SMALL)     /* Tux is small, add mints! */
 719         add_upgrade(Vector(posx, posy), col_side, UPGRADE_GROWUP);
 720       else     /* Tux is big, add an iceflower: */
 721         add_upgrade(Vector(posx, posy), col_side, UPGRADE_ICEFLOWER);
 722       play_sound(sounds[SND_UPGRADE], SOUND_CENTER_SPEAKER);
 723       break;
 724
 725     case 3: // Add a golden herring
 726       add_upgrade(Vector(posx, posy), col_side, UPGRADE_HERRING);
 727       break;
 728
 729     case 4: // Add a 1up extra
 730       add_upgrade(Vector(posx, posy), col_side, UPGRADE_1UP);
 731       break;
 732     default:
 733       break;
 734     }
 735
 736   /* Empty the box: */
 737   level->change(x, y, TM_IA, tile->next_tile);
 738 }
 739
 740 /* Try to grab a distro: */
 741 void
 742 World::trygrabdistro(float x, float y, int bounciness)
 743 {
 744   Tile* tile = gettile(x, y);
 745   if (tile && tile->distro)
 746     {
 747       level->change(x, y, TM_IA, tile->next_tile);
 748       play_sound(sounds[SND_DISTRO], SOUND_CENTER_SPEAKER);
 749
 750       if (bounciness == BOUNCE)
 751         {
 752           add_bouncy_distro(Vector(((int)(x + 1) / 32) * 32,
 753                                   (int)(y / 32) * 32));
 754         }
 755
 756       player_status.score = player_status.score + SCORE_DISTRO;
 757       player_status.distros++;
 758     }
 759 }
 760
 761 /* Try to bump a bad guy from below: */
 762 void
 763 World::trybumpbadguy(float x, float y)
 764 {
 765   // Bad guys:
 766   for (BadGuys::iterator i = bad_guys.begin(); i != bad_guys.end(); ++i)
 767     {
 768       if ((*i)->base.x >= x - 32 && (*i)->base.x <= x + 32 &&
 769           (*i)->base.y >= y - 16 && (*i)->base.y <= y + 16)
 770         {
 771           (*i)->collision(tux, CO_PLAYER, COLLISION_BUMP);
 772         }
 773     }
 774
 775   // Upgrades:
 776   for (unsigned int i = 0; i < upgrades.size(); i++)
 777     {
 778       if (upgrades[i]->base.height == 32 &&
 779           upgrades[i]->base.x >= x - 32 && upgrades[i]->base.x <= x + 32 &&
 780           upgrades[i]->base.y >= y - 16 && upgrades[i]->base.y <= y + 16)
 781         {
 782           upgrades[i]->collision(tux, CO_PLAYER, COLLISION_BUMP);
 783         }
 784     }
 785 }
 786
 787 /* EOF */
 788