src/player.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux -  A Jump'n Run
   4 //  Copyright (C) 2003 Tobias Glaesser <tobi.web@gmx.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
  20 #include <math.h>
  21
  22 #include "gameloop.h"
  23 #include "globals.h"
  24 #include "player.h"
  25 #include "defines.h"
  26 #include "scene.h"
  27 #include "tile.h"
  28 #include "sprite.h"
  29 #include "screen.h"
  30
  31 Surface* tux_life;
  32
  33 Sprite* smalltux_gameover;
  34 Sprite* smalltux_star;
  35 Sprite* largetux_star;
  36
  37 PlayerSprite smalltux;
  38 PlayerSprite largetux;
  39 PlayerSprite firetux;
  40
  41 PlayerKeymap keymap;
  42
  43 PlayerKeymap::PlayerKeymap()
  44 {
  45   keymap.jump  = SDLK_UP;
  46   keymap.duck  = SDLK_DOWN;
  47   keymap.left  = SDLK_LEFT;
  48   keymap.right = SDLK_RIGHT;
  49   keymap.fire  = SDLK_LCTRL;
  50 }
  51
  52 void player_input_init(player_input_type* pplayer_input)
  53 {
  54   pplayer_input->down = UP;
  55   pplayer_input->fire = UP;
  56   pplayer_input->left = UP;
  57   pplayer_input->old_fire = UP;
  58   pplayer_input->right = UP;
  59   pplayer_input->up = UP;
  60 }
  61
  62 void
  63 Player::init()
  64 {
  65   Level* plevel = World::current()->get_level();
  66
  67   holding_something = false;
  68
  69   base.width = 32;
  70   base.height = 32;
  71
  72   size = SMALL;
  73   got_coffee = false;
  74
  75   base.x = plevel->start_pos_x;
  76   base.y = plevel->start_pos_y;
  77   base.xm = 0;
  78   base.ym = 0;
  79   previous_base = old_base = base;
  80   dir = RIGHT;
  81   duck = false;
  82
  83   dying   = DYING_NOT;
  84   jumping = false;
  85
  86   frame_main = 0;
  87   frame_ = 0;
  88
  89   player_input_init(&input);
  90
  91   invincible_timer.init(true);
  92   skidding_timer.init(true);
  93   safe_timer.init(true);
  94   frame_timer.init(true);
  95
  96   physic.reset();
  97 }
  98
  99 int
 100 Player::key_event(SDLKey key, int state)
 101 {
 102   if(key == keymap.right)
 103     {
 104       input.right = state;
 105       return true;
 106     }
 107   else if(key == keymap.left)
 108     {
 109       input.left = state;
 110       return true;
 111     }
 112   else if(key == keymap.jump)
 113     {
 114       input.up = state;
 115       return true;
 116     }
 117   else if(key == keymap.duck)
 118     {
 119       input.down = state;
 120       return true;
 121     }
 122   else if(key == keymap.fire)
 123     {
 124       input.fire = state;
 125       return true;
 126     }
 127   else
 128     return false;
 129 }
 130
 131 void
 132 Player::level_begin()
 133 {
 134   base.x  = 100;
 135   base.y  = 170;
 136   base.xm = 0;
 137   base.ym = 0;
 138   previous_base = old_base = base;
 139   duck = false;
 140
 141   dying = DYING_NOT;
 142
 143   player_input_init(&input);
 144
 145   invincible_timer.init(true);
 146   skidding_timer.init(true);
 147   safe_timer.init(true);
 148   frame_timer.init(true);
 149
 150   physic.reset();
 151 }
 152
 153 void
 154 Player::action(double frame_ratio)
 155 {
 156   bool jumped_in_solid = false;
 157
 158   if (input.fire == UP)
 159     holding_something = false;
 160
 161   /* Move tux: */
 162   previous_base = base;
 163
 164   /* --- HANDLE TUX! --- */
 165   if(dying == DYING_NOT)
 166     handle_input();
 167
 168   physic.apply(frame_ratio, base.x, base.y);
 169
 170   if(dying == DYING_NOT)
 171     {
 172       base_type target = base;
 173
 174       collision_swept_object_map(&old_base, &base);
 175
 176       // Don't accelerate Tux if he is running against a wall
 177       if (target.x != base.x)
 178         {
 179           physic.set_velocity_x(0);
 180         }
 181
 182       // special exception for cases where we're stuck under tiles after
 183       // being ducked. In this case we drift out
 184       if(!duck && on_ground() && old_base.x == base.x && old_base.y == base.y
 185          && collision_object_map(base))
 186         {
 187           base.x += frame_ratio * WALK_SPEED * (dir ? 1 : -1);
 188           previous_base = old_base = base;
 189         }
 190       keep_in_bounds();
 191
 192       // Land:
 193       if (!on_ground())
 194         {
 195           physic.enable_gravity(true);
 196           if(under_solid())
 197             {
 198               // fall down
 199               physic.set_velocity_y(0);
 200               jumped_in_solid = true;
 201             }
 202         }
 203       else
 204         {
 205           /* Land: */
 206           if (physic.get_velocity_y() < 0)
 207             {
 208               base.y = (int)(((int)base.y / 32) * 32);
 209               physic.set_velocity_y(0);
 210             }
 211
 212           physic.enable_gravity(false);
 213           /* Reset score multiplier (for multi-hits): */
 214           player_status.score_multiplier = 1;
 215         }
 216
 217       if(jumped_in_solid)
 218         {
 219           if (isbrick(base.x, base.y) ||
 220               isfullbox(base.x, base.y))
 221             {
 222               World::current()->trygrabdistro(base.x, base.y - 32,BOUNCE);
 223               World::current()->trybumpbadguy(base.x, base.y - 64);
 224
 225               World::current()->trybreakbrick(base.x, base.y, size == SMALL);
 226
 227               bumpbrick(base.x, base.y);
 228               World::current()->tryemptybox(base.x, base.y, RIGHT);
 229             }
 230
 231           if (isbrick(base.x+ 31, base.y) ||
 232               isfullbox(base.x+ 31, base.y))
 233             {
 234               World::current()->trygrabdistro(base.x+ 31, base.y - 32,BOUNCE);
 235               World::current()->trybumpbadguy(base.x+ 31, base.y - 64);
 236
 237               if(size == BIG)
 238                 World::current()->trybreakbrick(base.x+ 31, base.y, size == SMALL);
 239
 240               bumpbrick(base.x+ 31, base.y);
 241               World::current()->tryemptybox(base.x+ 31, base.y, LEFT);
 242             }
 243         }
 244
 245       grabdistros();
 246
 247       if (jumped_in_solid)
 248         {
 249           ++base.y;
 250           ++old_base.y;
 251           if(on_ground())
 252             {
 253               /* Make sure jumping is off. */
 254               jumping = false;
 255             }
 256         }
 257     }
 258
 259   /* ---- DONE HANDLING TUX! --- */
 260
 261   // check some timers
 262   skidding_timer.check();
 263   invincible_timer.check();
 264   safe_timer.check();
 265 }
 266
 267 bool
 268 Player::on_ground()
 269 {
 270   return ( issolid(base.x + base.width / 2, base.y + base.height) ||
 271            issolid(base.x + 1, base.y + base.height) ||
 272            issolid(base.x + base.width - 1, base.y + base.height)  );
 273 }
 274
 275 bool
 276 Player::under_solid()
 277 {
 278   return ( issolid(base.x + base.width / 2, base.y) ||
 279            issolid(base.x + 1, base.y) ||
 280            issolid(base.x + base.width - 1, base.y)  );
 281 }
 282
 283 void
 284 Player::handle_horizontal_input()
 285 {
 286   float vx = physic.get_velocity_x();
 287   float vy = physic.get_velocity_y();
 288   float ax = physic.get_acceleration_x();
 289   float ay = physic.get_acceleration_y();
 290
 291   float dirsign = 0;
 292   if(input.left == DOWN && input.right == UP && (!duck || physic.get_velocity_y() != 0)) {
 293       dir = LEFT;
 294       dirsign = -1;
 295   } else if(input.left == UP && input.right == DOWN && (!duck || physic.get_velocity_y() != 0)) {
 296       dir = RIGHT;
 297       dirsign = 1;
 298   }
 299
 300   if (input.fire == UP) {
 301       ax = dirsign * WALK_ACCELERATION_X;
 302       // limit speed
 303       if(vx >= MAX_WALK_XM && dirsign > 0) {
 304         vx = MAX_WALK_XM;
 305         ax = 0;
 306       } else if(vx <= -MAX_WALK_XM && dirsign < 0) {
 307         vx = -MAX_WALK_XM;
 308         ax = 0;
 309       }
 310   } else {
 311       ax = dirsign * RUN_ACCELERATION_X;
 312       // limit speed
 313       if(vx >= MAX_RUN_XM && dirsign > 0) {
 314         vx = MAX_RUN_XM;
 315         ax = 0;
 316       } else if(vx <= -MAX_RUN_XM && dirsign < 0) {
 317         vx = -MAX_RUN_XM;
 318         ax = 0;
 319       }
 320   }
 321
 322   // we can reach WALK_SPEED without any acceleration
 323   if(dirsign != 0 && fabs(vx) < WALK_SPEED) {
 324     vx = dirsign * WALK_SPEED;
 325   }
 326
 327   // changing directions?
 328   if(on_ground() && ((vx < 0 && dirsign >0) || (vx>0 && dirsign<0))) {
 329       if(fabs(vx)>SKID_XM && !skidding_timer.check()) {
 330           skidding_timer.start(SKID_TIME);
 331           play_sound(sounds[SND_SKID], SOUND_CENTER_SPEAKER);
 332           ax *= 2.5;
 333       } else {
 334           ax *= 2;
 335       }
 336   }
 337
 338   // we get slower when not pressing any keys
 339   if(dirsign == 0) {
 340       if(fabs(vx) < WALK_SPEED) {
 341           vx = 0;
 342           ax = 0;
 343       } else if(vx < 0) {
 344           ax = WALK_ACCELERATION_X * 1.5;
 345       } else {
 346           ax = WALK_ACCELERATION_X * -1.5;
 347       }
 348   }
 349
 350   // if we're on ice slow down acceleration or deceleration
 351   if (isice(base.x, base.y + base.height))
 352   {
 353     /* the acceleration/deceleration rate on ice is inversely proportional to
 354      * the current velocity.
 355      */
 356
 357     // increasing 1 will increase acceleration/deceleration rate
 358     // decreasing 1 will decrease acceleration/deceleration rate
 359     //  must stay above zero, though
 360     if (ax != 0) ax *= 1 / fabs(vx);
 361   }
 362
 363   physic.set_velocity(vx, vy);
 364   physic.set_acceleration(ax, ay);
 365 }
 366
 367 void
 368 Player::handle_vertical_input()
 369 {
 370   if(input.up == DOWN)
 371     {
 372       if (on_ground())
 373         {
 374           // jump higher if we are running
 375           if (physic.get_velocity_x() > MAX_WALK_XM)
 376             physic.set_velocity_y(5.8);
 377           else
 378             physic.set_velocity_y(5.2);
 379
 380           --base.y;
 381           jumping = true;
 382           if (size == SMALL)
 383             play_sound(sounds[SND_JUMP], SOUND_CENTER_SPEAKER);
 384           else
 385             play_sound(sounds[SND_BIGJUMP], SOUND_CENTER_SPEAKER);
 386         }
 387     }
 388   else if(input.up == UP && jumping)
 389     {
 390       jumping = false;
 391       if(physic.get_velocity_y() > 0) {
 392         physic.set_velocity_y(0);
 393       }
 394     }
 395 }
 396
 397 void
 398 Player::handle_input()
 399 {
 400   /* Handle horizontal movement: */
 401     handle_horizontal_input();
 402
 403   /* Jump/jumping? */
 404
 405   if ( input.up == DOWN || (input.up == UP && jumping))
 406     {
 407       handle_vertical_input();
 408     }
 409
 410   /* Shoot! */
 411
 412   if (input.fire == DOWN && input.old_fire == UP && got_coffee)
 413     {
 414       World::current()->add_bullet(base.x, base.y, physic.get_velocity_x(), dir);
 415     }
 416
 417   /* tux animations: */
 418   if(!frame_timer.check())
 419     {
 420       frame_timer.start(25);
 421       if (input.right == UP && input.left == UP)
 422         {
 423           frame_main = 1;
 424           frame_ = 1;
 425         }
 426       else
 427         {
 428           if ((input.fire == DOWN && (global_frame_counter % 2) == 0) ||
 429               (global_frame_counter % 4) == 0)
 430             frame_main = (frame_main + 1) % 4;
 431
 432           frame_ = frame_main;
 433
 434           if (frame_ == 3)
 435             frame_ = 1;
 436         }
 437     }
 438
 439   /* Duck! */
 440   if (input.down == DOWN && size == BIG && !duck && physic.get_velocity_y() == 0)
 441     {
 442       duck = true;
 443       base.height = 32;
 444       base.y += 32;
 445       // changing base size confuses collision otherwise
 446       old_base = previous_base = base;
 447     }
 448   else if(input.down == UP && size == BIG && duck && physic.get_velocity_y() == 0 && on_ground())
 449     {
 450       duck = false;
 451       base.y -= 32;
 452       base.height = 64;
 453       old_base = previous_base = base;
 454     }
 455 }
 456
 457 void
 458 Player::grabdistros()
 459 {
 460   /* Grab distros: */
 461   if (!dying)
 462     {
 463       World::current()->trygrabdistro(base.x, base.y, NO_BOUNCE);
 464       World::current()->trygrabdistro(base.x+ 31, base.y, NO_BOUNCE);
 465
 466       World::current()->trygrabdistro(base.x, base.y + base.height, NO_BOUNCE);
 467       World::current()->trygrabdistro(base.x+ 31, base.y + base.height, NO_BOUNCE);
 468
 469       if(size == BIG)
 470         {
 471           World::current()->trygrabdistro(base.x, base.y + base.height / 2, NO_BOUNCE);
 472           World::current()->trygrabdistro(base.x+ 31, base.y + base.height / 2, NO_BOUNCE);
 473         }
 474
 475     }
 476
 477   /* Enough distros for a One-up? */
 478   if (player_status.distros >= DISTROS_LIFEUP)
 479     {
 480       player_status.distros = player_status.distros - DISTROS_LIFEUP;
 481       if(player_status.lives < MAX_LIVES)
 482         ++player_status.lives;
 483       /*We want to hear the sound even, if MAX_LIVES is reached*/
 484       play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 485     }
 486 }
 487
 488 void
 489 Player::draw()
 490 {
 491   if (!safe_timer.started() || (global_frame_counter % 2) == 0)
 492     {
 493       if (dying == DYING_SQUISHED)
 494         {
 495           smalltux_gameover->draw(base.x - scroll_x, base.y);
 496         }
 497       else
 498         {
 499           PlayerSprite* sprite;
 500
 501           if (size == SMALL)
 502             sprite = &smalltux;
 503           else if (got_coffee)
 504             sprite = &firetux;
 505           else
 506             sprite = &largetux;
 507
 508           if (skidding_timer.started())
 509             {
 510               if (dir == RIGHT)
 511                 sprite->skid_right->draw(base.x - scroll_x, base.y);
 512               else
 513                 sprite->skid_left->draw(base.x - scroll_x, base.y);
 514             }
 515           else
 516             {
 517               if (duck)
 518                 {
 519                   if (dir == RIGHT)
 520                     sprite->duck_right->draw(base.x - scroll_x, base.y);
 521                   else
 522                     sprite->duck_left->draw(base.x - scroll_x, base.y);
 523                 }
 524               else if (physic.get_velocity_y() != 0)
 525                 {
 526                   if (dir == RIGHT)
 527                     sprite->jump_right->draw(base.x - scroll_x, base.y);
 528                   else
 529                     sprite->jump_left->draw(base.x - scroll_x, base.y);
 530                 }
 531               else
 532                 {
 533                   if (fabsf(physic.get_velocity_x()) < 1.0f) // standing
 534                     {
 535                       if (dir == RIGHT)
 536                         sprite->stand_right->draw( base.x - scroll_x, base.y);
 537                       else
 538                         sprite->stand_left->draw( base.x - scroll_x, base.y);
 539                     }
 540                   else // moving
 541                     {
 542                       if (dir == RIGHT)
 543                         sprite->walk_right->draw(base.x - scroll_x, base.y);
 544                       else
 545                         sprite->walk_left->draw(base.x - scroll_x, base.y);
 546                     }
 547                 }
 548             }
 549
 550           // Draw arm overlay graphics when Tux is holding something
 551           if (holding_something && physic.get_velocity_y() == 0)
 552             {
 553               if (dir == RIGHT)
 554                 sprite->grab_right->draw(base.x - scroll_x, base.y);
 555               else
 556                 sprite->grab_left->draw(base.x - scroll_x, base.y);
 557             }
 558
 559           // Draw blinking star overlay
 560           if (invincible_timer.started())
 561             {
 562               if (size == SMALL || duck)
 563                 smalltux_star->draw(base.x - scroll_x, base.y);
 564               else
 565                 largetux_star->draw(base.x - scroll_x, base.y);
 566             }
 567         }
 568     }
 569
 570   if (debug_mode)
 571     fillrect(base.x - scroll_x, base.y,
 572              base.width, base.height, 75,75,75, 150);
 573 }
 574
 575 void
 576 Player::collision(void* p_c_object, int c_object)
 577 {
 578   BadGuy* pbad_c = NULL;
 579
 580   switch (c_object)
 581     {
 582     case CO_BADGUY:
 583       pbad_c = (BadGuy*) p_c_object;
 584
 585      /* Hurt player if he touches a badguy */
 586       if (!pbad_c->dying && !dying &&
 587           !safe_timer.started() &&
 588           pbad_c->mode != BadGuy::HELD)
 589         {
 590           if (pbad_c->mode == BadGuy::FLAT && input.fire == DOWN)
 591             {
 592               holding_something = true;
 593               pbad_c->mode = BadGuy::HELD;
 594               pbad_c->base.y-=8;
 595             }
 596           else if (pbad_c->mode == BadGuy::FLAT)
 597             {
 598               // Don't get hurt if we're kicking a flat badguy!
 599             }
 600           else if (pbad_c->mode == BadGuy::KICK)
 601             {
 602               /* Hurt if you get hit by kicked laptop: */
 603               if (!invincible_timer.started())
 604                 {
 605                   kill(SHRINK);
 606                 }
 607               else
 608                 {
 609                    pbad_c->dying = DYING_FALLING;
 610                    play_sound(sounds[SND_FALL], SOUND_CENTER_SPEAKER);
 611                    World::current()->add_score(pbad_c->base.x - scroll_x,
 612                                                pbad_c->base.y,
 613                                                25 * player_status.score_multiplier);
 614                 }
 615             }
 616           else
 617             {
 618               if (!invincible_timer.started())
 619                 {
 620                   kill(SHRINK);
 621                 }
 622               else
 623                 {
 624                   pbad_c->kill_me();
 625                 }
 626             }
 627           player_status.score_multiplier++;
 628         }
 629       break;
 630     default:
 631       break;
 632     }
 633
 634 }
 635
 636 /* Kill Player! */
 637
 638 void
 639 Player::kill(HurtMode mode)
 640 {
 641   play_sound(sounds[SND_HURT], SOUND_CENTER_SPEAKER);
 642
 643   physic.set_velocity_x(0);
 644
 645   if (mode == SHRINK && size == BIG)
 646     {
 647       if (got_coffee)
 648         {
 649           got_coffee = false;
 650         }
 651       else
 652         {
 653           size = SMALL;
 654           base.height = 32;
 655           duck = false;
 656         }
 657       safe_timer.start(TUX_SAFE_TIME);
 658     }
 659   else
 660     {
 661       physic.enable_gravity(true);
 662       physic.set_acceleration(0, 0);
 663       physic.set_velocity(0, 7);
 664       dying = DYING_SQUISHED;
 665     }
 666 }
 667
 668 void
 669 Player::is_dying()
 670 {
 671   remove_powerups();
 672   dying = DYING_NOT;
 673 }
 674
 675 bool Player::is_dead()
 676 {
 677   if(base.y > screen->h)
 678     return true;
 679   else
 680     return false;
 681 }
 682
 683 /* Remove Tux's power ups */
 684 void
 685 Player::remove_powerups()
 686 {
 687   got_coffee = false;
 688   size = SMALL;
 689   base.height = 32;
 690 }
 691
 692 void
 693 Player::keep_in_bounds()
 694 {
 695   Level* plevel = World::current()->get_level();
 696
 697   /* Keep tux in bounds: */
 698   if (base.x < 0)
 699     { // Lock Tux to the size of the level, so that he doesn't fall of
 700       // on the left side
 701       base.x = 0;
 702     }
 703   else if (base.x < scroll_x)
 704     {
 705       base.x = scroll_x;
 706     }
 707
 708   /* Keep in-bounds, vertically: */
 709   if (base.y > screen->h)
 710     {
 711       kill(KILL);
 712     }
 713
 714   int scroll_threshold = screen->w/2 - 80;
 715   if (debug_mode)
 716     {
 717       scroll_x += screen->w/2;
 718       // Backscrolling for debug mode
 719       if (scroll_x < base.x - 80)
 720         scroll_x = base.x - 80;
 721       else if (scroll_x > base.x + 80)
 722         scroll_x = base.x + 80;
 723       scroll_x -= screen->w/2;
 724
 725       if(scroll_x < 0)
 726         scroll_x = 0;
 727     }
 728   else
 729     {
 730       if (base.x > scroll_threshold + scroll_x
 731           && scroll_x < ((World::current()->get_level()->width * 32) - screen->w))
 732         {
 733           // FIXME: Scrolling needs to be handled by a seperate View
 734           // class, doing it as a player huck is ugly
 735
 736           // Scroll the screen in past center:
 737           scroll_x = base.x - scroll_threshold;
 738
 739           // Lock the scrolling to the levelsize, so that we don't
 740           // scroll over the right border
 741           if (scroll_x > 32 * plevel->width - screen->w)
 742             scroll_x = 32 * plevel->width - screen->w;
 743         }
 744     }
 745 }
 746
 747 // EOF //
 748