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