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   kick_timer.init(true);
  96
  97   physic.reset();
  98 }
  99
 100 int
 101 Player::key_event(SDLKey key, int state)
 102 {
 103   if(key == keymap.right)
 104     {
 105       input.right = state;
 106       return true;
 107     }
 108   else if(key == keymap.left)
 109     {
 110       input.left = state;
 111       return true;
 112     }
 113   else if(key == keymap.jump)
 114     {
 115       input.up = state;
 116       return true;
 117     }
 118   else if(key == keymap.duck)
 119     {
 120       input.down = state;
 121       return true;
 122     }
 123   else if(key == keymap.fire)
 124     {
 125       if (state == UP)
 126         input.old_fire = UP;
 127       input.fire = state;
 128       return true;
 129     }
 130   else
 131     return false;
 132 }
 133
 134 void
 135 Player::level_begin()
 136 {
 137   base.x  = 100;
 138   base.y  = 170;
 139   base.xm = 0;
 140   base.ym = 0;
 141   previous_base = old_base = base;
 142   duck = false;
 143
 144   dying = DYING_NOT;
 145
 146   player_input_init(&input);
 147
 148   invincible_timer.init(true);
 149   skidding_timer.init(true);
 150   safe_timer.init(true);
 151   frame_timer.init(true);
 152
 153   physic.reset();
 154 }
 155
 156 void
 157 Player::action(double frame_ratio)
 158 {
 159   bool jumped_in_solid = false;
 160
 161   if (input.fire == UP)
 162     holding_something = false;
 163
 164   /* Move tux: */
 165   previous_base = base;
 166
 167   /* --- HANDLE TUX! --- */
 168   if(dying == DYING_NOT)
 169     handle_input();
 170
 171   physic.apply(frame_ratio, base.x, base.y);
 172
 173   if(dying == DYING_NOT)
 174     {
 175       base_type target = base;
 176
 177       collision_swept_object_map(&old_base, &base);
 178
 179       // Don't accelerate Tux if he is running against a wall
 180       if (target.x != base.x)
 181         {
 182           physic.set_velocity_x(0);
 183         }
 184
 185       // special exception for cases where we're stuck under tiles after
 186       // being ducked. In this case we drift out
 187       if(!duck && on_ground() && old_base.x == base.x && old_base.y == base.y
 188          && collision_object_map(base))
 189         {
 190           base.x += frame_ratio * WALK_SPEED * (dir ? 1 : -1);
 191           previous_base = old_base = base;
 192         }
 193       keep_in_bounds();
 194
 195       // Land:
 196       if (!on_ground())
 197         {
 198           physic.enable_gravity(true);
 199           if(under_solid())
 200             {
 201               // fall down
 202               physic.set_velocity_y(0);
 203               jumped_in_solid = true;
 204             }
 205         }
 206       else
 207         {
 208           /* Land: */
 209           if (physic.get_velocity_y() < 0)
 210             {
 211               base.y = (int)(((int)base.y / 32) * 32);
 212               physic.set_velocity_y(0);
 213             }
 214
 215           physic.enable_gravity(false);
 216           /* Reset score multiplier (for multi-hits): */
 217           player_status.score_multiplier = 1;
 218         }
 219
 220       if(jumped_in_solid)
 221         {
 222           if (isbrick(base.x, base.y) ||
 223               isfullbox(base.x, base.y))
 224             {
 225               World::current()->trygrabdistro(base.x, base.y - 32,BOUNCE);
 226               World::current()->trybumpbadguy(base.x, base.y - 64);
 227
 228               World::current()->trybreakbrick(base.x, base.y, size == SMALL);
 229
 230               bumpbrick(base.x, base.y);
 231               World::current()->tryemptybox(base.x, base.y, RIGHT);
 232             }
 233
 234           if (isbrick(base.x+ 31, base.y) ||
 235               isfullbox(base.x+ 31, base.y))
 236             {
 237               World::current()->trygrabdistro(base.x+ 31, base.y - 32,BOUNCE);
 238               World::current()->trybumpbadguy(base.x+ 31, base.y - 64);
 239
 240               if(size == BIG)
 241                 World::current()->trybreakbrick(base.x+ 31, base.y, size == SMALL);
 242
 243               bumpbrick(base.x+ 31, base.y);
 244               World::current()->tryemptybox(base.x+ 31, base.y, LEFT);
 245             }
 246         }
 247
 248       grabdistros();
 249
 250       if (jumped_in_solid)
 251         {
 252           ++base.y;
 253           ++old_base.y;
 254           if(on_ground())
 255             {
 256               /* Make sure jumping is off. */
 257               jumping = false;
 258             }
 259         }
 260     }
 261
 262   /* ---- DONE HANDLING TUX! --- */
 263
 264   // check some timers
 265   skidding_timer.check();
 266   invincible_timer.check();
 267   safe_timer.check();
 268   kick_timer.check();
 269 }
 270
 271 bool
 272 Player::on_ground()
 273 {
 274   return ( issolid(base.x + base.width / 2, base.y + base.height) ||
 275            issolid(base.x + 1, base.y + base.height) ||
 276            issolid(base.x + base.width - 1, base.y + base.height)  );
 277 }
 278
 279 bool
 280 Player::under_solid()
 281 {
 282   return ( issolid(base.x + base.width / 2, base.y) ||
 283            issolid(base.x + 1, base.y) ||
 284            issolid(base.x + base.width - 1, base.y)  );
 285 }
 286
 287 void
 288 Player::handle_horizontal_input()
 289 {
 290   float vx = physic.get_velocity_x();
 291   float vy = physic.get_velocity_y();
 292   float ax = physic.get_acceleration_x();
 293   float ay = physic.get_acceleration_y();
 294
 295   float dirsign = 0;
 296   if(input.left == DOWN && input.right == UP && (!duck || physic.get_velocity_y() != 0)) {
 297       dir = LEFT;
 298       dirsign = -1;
 299   } else if(input.left == UP && input.right == DOWN && (!duck || physic.get_velocity_y() != 0)) {
 300       dir = RIGHT;
 301       dirsign = 1;
 302   }
 303
 304   if (input.fire == UP) {
 305       ax = dirsign * WALK_ACCELERATION_X;
 306       // limit speed
 307       if(vx >= MAX_WALK_XM && dirsign > 0) {
 308         vx = MAX_WALK_XM;
 309         ax = 0;
 310       } else if(vx <= -MAX_WALK_XM && dirsign < 0) {
 311         vx = -MAX_WALK_XM;
 312         ax = 0;
 313       }
 314   } else {
 315       ax = dirsign * RUN_ACCELERATION_X;
 316       // limit speed
 317       if(vx >= MAX_RUN_XM && dirsign > 0) {
 318         vx = MAX_RUN_XM;
 319         ax = 0;
 320       } else if(vx <= -MAX_RUN_XM && dirsign < 0) {
 321         vx = -MAX_RUN_XM;
 322         ax = 0;
 323       }
 324   }
 325
 326   // we can reach WALK_SPEED without any acceleration
 327   if(dirsign != 0 && fabs(vx) < WALK_SPEED) {
 328     vx = dirsign * WALK_SPEED;
 329   }
 330
 331   // changing directions?
 332   if(on_ground() && ((vx < 0 && dirsign >0) || (vx>0 && dirsign<0))) {
 333       if(fabs(vx)>SKID_XM && !skidding_timer.check()) {
 334           skidding_timer.start(SKID_TIME);
 335           play_sound(sounds[SND_SKID], SOUND_CENTER_SPEAKER);
 336           ax *= 2.5;
 337       } else {
 338           ax *= 2;
 339       }
 340   }
 341
 342   // we get slower when not pressing any keys
 343   if(dirsign == 0) {
 344       if(fabs(vx) < WALK_SPEED) {
 345           vx = 0;
 346           ax = 0;
 347       } else if(vx < 0) {
 348           ax = WALK_ACCELERATION_X * 1.5;
 349       } else {
 350           ax = WALK_ACCELERATION_X * -1.5;
 351       }
 352   }
 353
 354   // if we're on ice slow down acceleration or deceleration
 355   if (isice(base.x, base.y + base.height))
 356   {
 357     /* the acceleration/deceleration rate on ice is inversely proportional to
 358      * the current velocity.
 359      */
 360
 361     // increasing 1 will increase acceleration/deceleration rate
 362     // decreasing 1 will decrease acceleration/deceleration rate
 363     //  must stay above zero, though
 364     if (ax != 0) ax *= 1 / fabs(vx);
 365   }
 366
 367   physic.set_velocity(vx, vy);
 368   physic.set_acceleration(ax, ay);
 369 }
 370
 371 void
 372 Player::handle_vertical_input()
 373 {
 374   if(input.up == DOWN)
 375     {
 376       if (on_ground())
 377         {
 378           // jump higher if we are running
 379           if (physic.get_velocity_x() > MAX_WALK_XM)
 380             physic.set_velocity_y(5.8);
 381           else
 382             physic.set_velocity_y(5.2);
 383
 384           --base.y;
 385           jumping = true;
 386           if (size == SMALL)
 387             play_sound(sounds[SND_JUMP], SOUND_CENTER_SPEAKER);
 388           else
 389             play_sound(sounds[SND_BIGJUMP], SOUND_CENTER_SPEAKER);
 390         }
 391     }
 392   else if(input.up == UP && jumping)
 393     {
 394       jumping = false;
 395       if(physic.get_velocity_y() > 0) {
 396         physic.set_velocity_y(0);
 397       }
 398     }
 399 }
 400
 401 void
 402 Player::handle_input()
 403 {
 404   /* Handle horizontal movement: */
 405     handle_horizontal_input();
 406
 407   /* Jump/jumping? */
 408
 409   if ( input.up == DOWN || (input.up == UP && jumping))
 410     {
 411       handle_vertical_input();
 412     }
 413
 414   /* Shoot! */
 415
 416   if (input.fire == DOWN && input.old_fire == UP && got_coffee)
 417     {
 418       World::current()->add_bullet(base.x, base.y, physic.get_velocity_x(), dir);
 419       input.old_fire = DOWN;
 420     }
 421
 422   /* tux animations: */
 423   if(!frame_timer.check())
 424     {
 425       frame_timer.start(25);
 426       if (input.right == UP && input.left == UP)
 427         {
 428           frame_main = 1;
 429           frame_ = 1;
 430         }
 431       else
 432         {
 433           if ((input.fire == DOWN && (global_frame_counter % 2) == 0) ||
 434               (global_frame_counter % 4) == 0)
 435             frame_main = (frame_main + 1) % 4;
 436
 437           frame_ = frame_main;
 438
 439           if (frame_ == 3)
 440             frame_ = 1;
 441         }
 442     }
 443
 444   /* Duck! */
 445   if (input.down == DOWN && size == BIG && !duck && physic.get_velocity_y() == 0 && on_ground())
 446     {
 447       duck = true;
 448       base.height = 32;
 449       base.y += 32;
 450       // changing base size confuses collision otherwise
 451       old_base = previous_base = base;
 452     }
 453   else if(input.down == UP && size == BIG && duck && physic.get_velocity_y() == 0 && on_ground())
 454     {
 455       duck = false;
 456       base.y -= 32;
 457       base.height = 64;
 458       old_base = previous_base = base;
 459     }
 460 }
 461
 462 void
 463 Player::grabdistros()
 464 {
 465   /* Grab distros: */
 466   if (!dying)
 467     {
 468       World::current()->trygrabdistro(base.x, base.y, NO_BOUNCE);
 469       World::current()->trygrabdistro(base.x+ 31, base.y, NO_BOUNCE);
 470
 471       World::current()->trygrabdistro(base.x, base.y + base.height, NO_BOUNCE);
 472       World::current()->trygrabdistro(base.x+ 31, base.y + base.height, NO_BOUNCE);
 473
 474       if(size == BIG)
 475         {
 476           World::current()->trygrabdistro(base.x, base.y + base.height / 2, NO_BOUNCE);
 477           World::current()->trygrabdistro(base.x+ 31, base.y + base.height / 2, NO_BOUNCE);
 478         }
 479
 480     }
 481
 482   /* Enough distros for a One-up? */
 483   if (player_status.distros >= DISTROS_LIFEUP)
 484     {
 485       player_status.distros = player_status.distros - DISTROS_LIFEUP;
 486       if(player_status.lives < MAX_LIVES)
 487         ++player_status.lives;
 488       /*We want to hear the sound even, if MAX_LIVES is reached*/
 489       play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 490     }
 491 }
 492
 493 void
 494 Player::draw()
 495 {
 496   if (!safe_timer.started() || (global_frame_counter % 2) == 0)
 497     {
 498       if (dying == DYING_SQUISHED)
 499         {
 500           smalltux_gameover->draw(base.x - scroll_x, base.y);
 501         }
 502       else
 503         {
 504           PlayerSprite* sprite;
 505
 506           if (size == SMALL)
 507             sprite = &smalltux;
 508           else if (got_coffee)
 509             sprite = &firetux;
 510           else
 511             sprite = &largetux;
 512
 513           if (duck && size != SMALL)
 514             {
 515               if (dir == RIGHT)
 516                 sprite->duck_right->draw(base.x - scroll_x, base.y);
 517               else
 518                 sprite->duck_left->draw(base.x - scroll_x, base.y);
 519             }
 520           else if (skidding_timer.started())
 521             {
 522               if (dir == RIGHT)
 523                 sprite->skid_right->draw(base.x - scroll_x, base.y);
 524               else
 525                 sprite->skid_left->draw(base.x - scroll_x, base.y);
 526             }
 527           else if (kick_timer.started())
 528             {
 529               if (dir == RIGHT)
 530                 sprite->kick_right->draw(base.x - scroll_x, base.y);
 531               else
 532                 sprite->kick_left->draw(base.x - scroll_x, base.y);
 533             }
 534           else if (physic.get_velocity_y() != 0)
 535             {
 536               if (dir == RIGHT)
 537                 sprite->jump_right->draw(base.x - scroll_x, base.y);
 538               else
 539                 sprite->jump_left->draw(base.x - scroll_x, base.y);
 540             }
 541           else
 542             {
 543               if (fabsf(physic.get_velocity_x()) < 1.0f) // standing
 544                 {
 545                   if (dir == RIGHT)
 546                     sprite->stand_right->draw( base.x - scroll_x, base.y);
 547                   else
 548                     sprite->stand_left->draw( base.x - scroll_x, base.y);
 549                 }
 550               else // moving
 551                 {
 552                   if (dir == RIGHT)
 553                     sprite->walk_right->draw(base.x - scroll_x, base.y);
 554                   else
 555                     sprite->walk_left->draw(base.x - scroll_x, base.y);
 556                 }
 557             }
 558
 559           // Draw arm overlay graphics when Tux is holding something
 560           if (holding_something && physic.get_velocity_y() == 0)
 561             {
 562               if (dir == RIGHT)
 563                 sprite->grab_right->draw(base.x - scroll_x, base.y);
 564               else
 565                 sprite->grab_left->draw(base.x - scroll_x, base.y);
 566             }
 567
 568           // Draw blinking star overlay
 569           if (invincible_timer.started())
 570             {
 571               if (size == SMALL || duck)
 572                 smalltux_star->draw(base.x - scroll_x, base.y);
 573               else
 574                 largetux_star->draw(base.x - scroll_x, base.y);
 575             }
 576         }
 577     }
 578
 579   if (debug_mode)
 580     fillrect(base.x - scroll_x, base.y,
 581              base.width, base.height, 75,75,75, 150);
 582 }
 583
 584 void
 585 Player::collision(void* p_c_object, int c_object)
 586 {
 587   BadGuy* pbad_c = NULL;
 588
 589   switch (c_object)
 590     {
 591     case CO_BADGUY:
 592       pbad_c = (BadGuy*) p_c_object;
 593
 594      /* Hurt player if he touches a badguy */
 595       if (!pbad_c->dying && !dying &&
 596           !safe_timer.started() &&
 597           pbad_c->mode != BadGuy::HELD)
 598         {
 599           if (pbad_c->mode == BadGuy::FLAT && input.fire == DOWN
 600                && !holding_something)
 601             {
 602               holding_something = true;
 603               pbad_c->mode = BadGuy::HELD;
 604               pbad_c->base.y-=8;
 605             }
 606           else if (pbad_c->mode == BadGuy::FLAT)
 607             {
 608               // Don't get hurt if we're kicking a flat badguy!
 609             }
 610           else if (pbad_c->mode == BadGuy::KICK)
 611             {
 612               /* Hurt if you get hit by kicked laptop: */
 613               if (!invincible_timer.started())
 614                 {
 615                   kill(SHRINK);
 616                 }
 617               else
 618                 {
 619                    pbad_c->dying = DYING_FALLING;
 620                    play_sound(sounds[SND_FALL], SOUND_CENTER_SPEAKER);
 621                    World::current()->add_score(pbad_c->base.x - scroll_x,
 622                                                pbad_c->base.y,
 623                                                25 * player_status.score_multiplier);
 624                 }
 625             }
 626           else
 627             {
 628               if (!invincible_timer.started())
 629                 {
 630                   kill(SHRINK);
 631                 }
 632               else
 633                 {
 634                   pbad_c->kill_me();
 635                 }
 636             }
 637           player_status.score_multiplier++;
 638         }
 639       break;
 640     default:
 641       break;
 642     }
 643
 644 }
 645
 646 /* Kill Player! */
 647
 648 void
 649 Player::kill(HurtMode mode)
 650 {
 651   play_sound(sounds[SND_HURT], SOUND_CENTER_SPEAKER);
 652
 653   physic.set_velocity_x(0);
 654
 655   if (mode == SHRINK && size == BIG)
 656     {
 657       if (got_coffee)
 658         {
 659           got_coffee = false;
 660         }
 661       else
 662         {
 663           size = SMALL;
 664           base.height = 32;
 665           duck = false;
 666         }
 667       safe_timer.start(TUX_SAFE_TIME);
 668     }
 669   else
 670     {
 671       physic.enable_gravity(true);
 672       physic.set_acceleration(0, 0);
 673       physic.set_velocity(0, 7);
 674       dying = DYING_SQUISHED;
 675     }
 676 }
 677
 678 void
 679 Player::is_dying()
 680 {
 681   remove_powerups();
 682   dying = DYING_NOT;
 683 }
 684
 685 bool Player::is_dead()
 686 {
 687   if(base.y > screen->h)
 688     return true;
 689   else
 690     return false;
 691 }
 692
 693 /* Remove Tux's power ups */
 694 void
 695 Player::remove_powerups()
 696 {
 697   got_coffee = false;
 698   size = SMALL;
 699   base.height = 32;
 700 }
 701
 702 void
 703 Player::keep_in_bounds()
 704 {
 705   Level* plevel = World::current()->get_level();
 706
 707   /* Keep tux in bounds: */
 708   if (base.x < 0)
 709     { // Lock Tux to the size of the level, so that he doesn't fall of
 710       // on the left side
 711       base.x = 0;
 712     }
 713   else if (base.x < scroll_x)
 714     {
 715       base.x = scroll_x;
 716     }
 717
 718   /* Keep in-bounds, vertically: */
 719   if (base.y > screen->h)
 720     {
 721       kill(KILL);
 722     }
 723
 724   int scroll_threshold = screen->w/2 - 80;
 725   if (debug_mode)
 726     {
 727       scroll_x += screen->w/2;
 728       // Backscrolling for debug mode
 729       if (scroll_x < base.x - 80)
 730         scroll_x = base.x - 80;
 731       else if (scroll_x > base.x + 80)
 732         scroll_x = base.x + 80;
 733       scroll_x -= screen->w/2;
 734
 735       if(scroll_x < 0)
 736         scroll_x = 0;
 737     }
 738   else
 739     {
 740       if (base.x > scroll_threshold + scroll_x
 741           && scroll_x < ((World::current()->get_level()->width * 32) - screen->w))
 742         {
 743           // FIXME: Scrolling needs to be handled by a seperate View
 744           // class, doing it as a player huck is ugly
 745
 746           // Scroll the screen in past center:
 747           scroll_x = base.x - scroll_threshold;
 748
 749           // Lock the scrolling to the levelsize, so that we don't
 750           // scroll over the right border
 751           if (scroll_x > 32 * plevel->width - screen->w)
 752             scroll_x = 32 * plevel->width - screen->w;
 753         }
 754     }
 755 }
 756
 757 // EOF //
 758