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 #include "gameloop.h"
  22 #include "globals.h"
  23 #include "player.h"
  24 #include "defines.h"
  25 #include "scene.h"
  26 #include "tile.h"
  27 #include "sprite.h"
  28 #include "screen.h"
  29
  30 Surface* tux_life;
  31
  32 Sprite* smalltux_gameover;
  33 Sprite* smalltux_star;
  34 Sprite* largetux_star;
  35
  36 PlayerSprite smalltux;
  37 PlayerSprite largetux;
  38 PlayerSprite firetux;
  39
  40 PlayerKeymap keymap;
  41
  42 PlayerKeymap::PlayerKeymap()
  43 {
  44   keymap.jump  = SDLK_UP;
  45   keymap.duck  = SDLK_DOWN;
  46   keymap.left  = SDLK_LEFT;
  47   keymap.right = SDLK_RIGHT;
  48   keymap.fire  = SDLK_LCTRL;
  49 }
  50
  51 void player_input_init(player_input_type* pplayer_input)
  52 {
  53   pplayer_input->down = UP;
  54   pplayer_input->fire = UP;
  55   pplayer_input->left = UP;
  56   pplayer_input->old_fire = UP;
  57   pplayer_input->right = UP;
  58   pplayer_input->up = UP;
  59   pplayer_input->old_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   can_jump = true;
  86
  87   frame_main = 0;
  88   frame_ = 0;
  89
  90   player_input_init(&input);
  91
  92   invincible_timer.init(true);
  93   skidding_timer.init(true);
  94   safe_timer.init(true);
  95   frame_timer.init(true);
  96   kick_timer.init(true);
  97
  98   physic.reset();
  99 }
 100
 101 int
 102 Player::key_event(SDLKey key, int state)
 103 {
 104   if(key == keymap.right)
 105     {
 106       input.right = state;
 107       return true;
 108     }
 109   else if(key == keymap.left)
 110     {
 111       input.left = state;
 112       return true;
 113     }
 114   else if(key == keymap.jump)
 115     {
 116       input.up = state;
 117       return true;
 118     }
 119   else if(key == keymap.duck)
 120     {
 121       input.down = state;
 122       return true;
 123     }
 124   else if(key == keymap.fire)
 125     {
 126       if (state == UP)
 127         input.old_fire = UP;
 128       input.fire = state;
 129       return true;
 130     }
 131   else
 132     return false;
 133 }
 134
 135 void
 136 Player::level_begin()
 137 {
 138   base.x  = 100;
 139   base.y  = 170;
 140   base.xm = 0;
 141   base.ym = 0;
 142   previous_base = old_base = base;
 143   duck = false;
 144
 145   dying = DYING_NOT;
 146
 147   player_input_init(&input);
 148
 149   invincible_timer.init(true);
 150   skidding_timer.init(true);
 151   safe_timer.init(true);
 152   frame_timer.init(true);
 153
 154   physic.reset();
 155 }
 156
 157 void
 158 Player::action(double frame_ratio)
 159 {
 160   bool jumped_in_solid = false;
 161
 162   if (input.fire == UP)
 163     holding_something = false;
 164
 165   /* Move tux: */
 166   previous_base = base;
 167
 168   /* --- HANDLE TUX! --- */
 169   if(dying == DYING_NOT)
 170     handle_input();
 171
 172   physic.apply(frame_ratio, base.x, base.y);
 173
 174   if(dying == DYING_NOT)
 175     {
 176       base_type target = base;
 177
 178       collision_swept_object_map(&old_base, &base);
 179
 180       // Don't accelerate Tux if he is running against a wall
 181       if (target.x != base.x)
 182         {
 183           physic.set_velocity_x(0);
 184         }
 185
 186       // special exception for cases where we're stuck under tiles after
 187       // being ducked. In this case we drift out
 188       if(!duck && on_ground() && old_base.x == base.x && old_base.y == base.y
 189          && collision_object_map(base))
 190         {
 191           base.x += frame_ratio * WALK_SPEED * (dir ? 1 : -1);
 192           previous_base = old_base = base;
 193         }
 194       check_bounds();
 195
 196       // Land:
 197       if (!on_ground())
 198         {
 199           physic.enable_gravity(true);
 200           if(under_solid())
 201             {
 202               // fall down
 203               physic.set_velocity_y(0);
 204               jumped_in_solid = true;
 205             }
 206         }
 207       else
 208         {
 209           /* Land: */
 210           if (physic.get_velocity_y() < 0)
 211             {
 212               base.y = (int)(((int)base.y / 32) * 32);
 213               physic.set_velocity_y(0);
 214             }
 215
 216           physic.enable_gravity(false);
 217           /* Reset score multiplier (for multi-hits): */
 218           player_status.score_multiplier = 1;
 219         }
 220
 221       if(jumped_in_solid)
 222         {
 223           if (isbrick(base.x, base.y) ||
 224               isfullbox(base.x, base.y))
 225             {
 226               World::current()->trygrabdistro(base.x, base.y - 32,BOUNCE);
 227               World::current()->trybumpbadguy(base.x, base.y - 64);
 228
 229               World::current()->trybreakbrick(base.x, base.y, size == SMALL);
 230
 231               bumpbrick(base.x, base.y);
 232               World::current()->tryemptybox(base.x, base.y, RIGHT);
 233             }
 234
 235           if (isbrick(base.x+ 31, base.y) ||
 236               isfullbox(base.x+ 31, base.y))
 237             {
 238               World::current()->trygrabdistro(base.x+ 31, base.y - 32,BOUNCE);
 239               World::current()->trybumpbadguy(base.x+ 31, base.y - 64);
 240
 241               if(size == BIG)
 242                 World::current()->trybreakbrick(base.x+ 31, base.y, size == SMALL);
 243
 244               bumpbrick(base.x+ 31, base.y);
 245               World::current()->tryemptybox(base.x+ 31, base.y, LEFT);
 246             }
 247         }
 248
 249       grabdistros();
 250
 251       if (jumped_in_solid)
 252         {
 253           ++base.y;
 254           ++old_base.y;
 255           if(on_ground())
 256             {
 257               /* Make sure jumping is off. */
 258               jumping = false;
 259             }
 260         }
 261     }
 262
 263   /* ---- DONE HANDLING TUX! --- */
 264
 265   // check some timers
 266   skidding_timer.check();
 267   invincible_timer.check();
 268   safe_timer.check();
 269   kick_timer.check();
 270 }
 271
 272 bool
 273 Player::on_ground()
 274 {
 275   return ( issolid(base.x + base.width / 2, base.y + base.height) ||
 276            issolid(base.x + 1, base.y + base.height) ||
 277            issolid(base.x + base.width - 1, base.y + base.height)  );
 278 }
 279
 280 bool
 281 Player::under_solid()
 282 {
 283   return ( issolid(base.x + base.width / 2, base.y) ||
 284            issolid(base.x + 1, base.y) ||
 285            issolid(base.x + base.width - 1, base.y)  );
 286 }
 287
 288 void
 289 Player::handle_horizontal_input()
 290 {
 291   float vx = physic.get_velocity_x();
 292   float vy = physic.get_velocity_y();
 293   float ax = physic.get_acceleration_x();
 294   float ay = physic.get_acceleration_y();
 295
 296   float dirsign = 0;
 297   if(input.left == DOWN && input.right == UP && (!duck || physic.get_velocity_y() != 0)) {
 298       dir = LEFT;
 299       dirsign = -1;
 300   } else if(input.left == UP && input.right == DOWN && (!duck || physic.get_velocity_y() != 0)) {
 301       dir = RIGHT;
 302       dirsign = 1;
 303   }
 304
 305   if (input.fire == UP) {
 306       ax = dirsign * WALK_ACCELERATION_X;
 307       // limit speed
 308       if(vx >= MAX_WALK_XM && dirsign > 0) {
 309         vx = MAX_WALK_XM;
 310         ax = 0;
 311       } else if(vx <= -MAX_WALK_XM && dirsign < 0) {
 312         vx = -MAX_WALK_XM;
 313         ax = 0;
 314       }
 315   } else {
 316       ax = dirsign * RUN_ACCELERATION_X;
 317       // limit speed
 318       if(vx >= MAX_RUN_XM && dirsign > 0) {
 319         vx = MAX_RUN_XM;
 320         ax = 0;
 321       } else if(vx <= -MAX_RUN_XM && dirsign < 0) {
 322         vx = -MAX_RUN_XM;
 323         ax = 0;
 324       }
 325   }
 326
 327   // we can reach WALK_SPEED without any acceleration
 328   if(dirsign != 0 && fabs(vx) < WALK_SPEED) {
 329     vx = dirsign * WALK_SPEED;
 330   }
 331
 332   // changing directions?
 333   if(on_ground() && ((vx < 0 && dirsign >0) || (vx>0 && dirsign<0))) {
 334       if(fabs(vx)>SKID_XM && !skidding_timer.check()) {
 335           skidding_timer.start(SKID_TIME);
 336           play_sound(sounds[SND_SKID], SOUND_CENTER_SPEAKER);
 337           ax *= 2.5;
 338       } else {
 339           ax *= 2;
 340       }
 341   }
 342
 343   // we get slower when not pressing any keys
 344   if(dirsign == 0) {
 345       if(fabs(vx) < WALK_SPEED) {
 346           vx = 0;
 347           ax = 0;
 348       } else if(vx < 0) {
 349           ax = WALK_ACCELERATION_X * 1.5;
 350       } else {
 351           ax = WALK_ACCELERATION_X * -1.5;
 352       }
 353   }
 354
 355   // if we're on ice slow down acceleration or deceleration
 356   if (isice(base.x, base.y + base.height))
 357   {
 358     /* the acceleration/deceleration rate on ice is inversely proportional to
 359      * the current velocity.
 360      */
 361
 362     // increasing 1 will increase acceleration/deceleration rate
 363     // decreasing 1 will decrease acceleration/deceleration rate
 364     //  must stay above zero, though
 365     if (ax != 0) ax *= 1 / fabs(vx);
 366   }
 367
 368   physic.set_velocity(vx, vy);
 369   physic.set_acceleration(ax, ay);
 370 }
 371
 372 void
 373 Player::handle_vertical_input()
 374 {
 375   // Press jump key
 376   if(input.up == DOWN && can_jump)
 377     {
 378       if (on_ground())
 379         {
 380           // jump higher if we are running
 381           if (fabs(physic.get_velocity_x()) > MAX_WALK_XM)
 382             physic.set_velocity_y(5.8);
 383           else
 384             physic.set_velocity_y(5.2);
 385
 386           --base.y;
 387           jumping = true;
 388           can_jump = false;
 389           if (size == SMALL)
 390             play_sound(sounds[SND_JUMP], SOUND_CENTER_SPEAKER);
 391           else
 392             play_sound(sounds[SND_BIGJUMP], SOUND_CENTER_SPEAKER);
 393         }
 394     }
 395   // Let go of jump key
 396   else if(input.up == UP && jumping)
 397     {
 398       jumping = false;
 399       if(physic.get_velocity_y() > 0) {
 400         physic.set_velocity_y(0);
 401       }
 402     }
 403
 404   if ( (issolid(base.x + base.width / 2, base.y + base.height + 64) ||
 405         issolid(base.x + 1, base.y + base.height + 64) ||
 406         issolid(base.x + base.width - 1, base.y + base.height + 64))
 407        && jumping  == false
 408        && can_jump == false
 409        && input.up == DOWN
 410        && input.old_up == UP)
 411     {
 412       can_jump = true;
 413     }
 414
 415   input.old_up = input.up;
 416 }
 417
 418 void
 419 Player::handle_input()
 420 {
 421   /* Handle horizontal movement: */
 422     handle_horizontal_input();
 423
 424   /* Jump/jumping? */
 425
 426   if (on_ground() && input.up == UP)
 427     can_jump = true;
 428   if (input.up == DOWN || (input.up == UP && jumping))
 429     {
 430       handle_vertical_input();
 431     }
 432
 433   /* Shoot! */
 434
 435   if (input.fire == DOWN && input.old_fire == UP && got_coffee)
 436     {
 437       World::current()->add_bullet(base.x, base.y, physic.get_velocity_x(), dir);
 438       input.old_fire = DOWN;
 439     }
 440
 441   /* tux animations: */
 442   if(!frame_timer.check())
 443     {
 444       frame_timer.start(25);
 445       if (input.right == UP && input.left == UP)
 446         {
 447           frame_main = 1;
 448           frame_ = 1;
 449         }
 450       else
 451         {
 452           if ((input.fire == DOWN && (global_frame_counter % 2) == 0) ||
 453               (global_frame_counter % 4) == 0)
 454             frame_main = (frame_main + 1) % 4;
 455
 456           frame_ = frame_main;
 457
 458           if (frame_ == 3)
 459             frame_ = 1;
 460         }
 461     }
 462
 463   /* Duck! */
 464   if (input.down == DOWN && size == BIG && !duck && physic.get_velocity_y() == 0 && on_ground())
 465     {
 466       duck = true;
 467       base.height = 32;
 468       base.y += 32;
 469       // changing base size confuses collision otherwise
 470       old_base = previous_base = base;
 471     }
 472   else if(input.down == UP && size == BIG && duck && physic.get_velocity_y() == 0 && on_ground())
 473     {
 474       duck = false;
 475       base.y -= 32;
 476       base.height = 64;
 477       // changing base size confuses collision otherwise
 478       old_base = previous_base = base;
 479     }
 480 }
 481
 482 void
 483 Player::grow()
 484 {
 485   if(size == BIG)
 486     return;
 487
 488   size = BIG;
 489   base.height = 64;
 490   base.y -= 32;
 491
 492   old_base = previous_base = base;
 493 }
 494
 495 void
 496 Player::grabdistros()
 497 {
 498   /* Grab distros: */
 499   if (!dying)
 500     {
 501       World::current()->trygrabdistro(base.x, base.y, NO_BOUNCE);
 502       World::current()->trygrabdistro(base.x+ 31, base.y, NO_BOUNCE);
 503
 504       World::current()->trygrabdistro(base.x, base.y + base.height, NO_BOUNCE);
 505       World::current()->trygrabdistro(base.x+ 31, base.y + base.height, NO_BOUNCE);
 506
 507       if(size == BIG)
 508         {
 509           World::current()->trygrabdistro(base.x, base.y + base.height / 2, NO_BOUNCE);
 510           World::current()->trygrabdistro(base.x+ 31, base.y + base.height / 2, NO_BOUNCE);
 511         }
 512
 513     }
 514
 515   /* Enough distros for a One-up? */
 516   if (player_status.distros >= DISTROS_LIFEUP)
 517     {
 518       player_status.distros = player_status.distros - DISTROS_LIFEUP;
 519       if(player_status.lives < MAX_LIVES)
 520         ++player_status.lives;
 521       /*We want to hear the sound even, if MAX_LIVES is reached*/
 522       play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 523     }
 524 }
 525
 526 void
 527 Player::draw()
 528 {
 529   if (!safe_timer.started() || (global_frame_counter % 2) == 0)
 530     {
 531       if (dying == DYING_SQUISHED)
 532         {
 533           smalltux_gameover->draw(base.x - scroll_x, base.y);
 534         }
 535       else
 536         {
 537           PlayerSprite* sprite;
 538
 539           if (size == SMALL)
 540             sprite = &smalltux;
 541           else if (got_coffee)
 542             sprite = &firetux;
 543           else
 544             sprite = &largetux;
 545
 546           if (duck && size != SMALL)
 547             {
 548               if (dir == RIGHT)
 549                 sprite->duck_right->draw(base.x - scroll_x, base.y);
 550               else
 551                 sprite->duck_left->draw(base.x - scroll_x, base.y);
 552             }
 553           else if (skidding_timer.started())
 554             {
 555               if (dir == RIGHT)
 556                 sprite->skid_right->draw(base.x - scroll_x, base.y);
 557               else
 558                 sprite->skid_left->draw(base.x - scroll_x, base.y);
 559             }
 560           else if (kick_timer.started())
 561             {
 562               if (dir == RIGHT)
 563                 sprite->kick_right->draw(base.x - scroll_x, base.y);
 564               else
 565                 sprite->kick_left->draw(base.x - scroll_x, base.y);
 566             }
 567           else if (physic.get_velocity_y() != 0)
 568             {
 569               if (dir == RIGHT)
 570                 sprite->jump_right->draw(base.x - scroll_x, base.y);
 571               else
 572                 sprite->jump_left->draw(base.x - scroll_x, base.y);
 573             }
 574           else
 575             {
 576               if (fabsf(physic.get_velocity_x()) < 1.0f) // standing
 577                 {
 578                   if (dir == RIGHT)
 579                     sprite->stand_right->draw( base.x - scroll_x, base.y);
 580                   else
 581                     sprite->stand_left->draw( base.x - scroll_x, base.y);
 582                 }
 583               else // moving
 584                 {
 585                   if (dir == RIGHT)
 586                     sprite->walk_right->draw(base.x - scroll_x, base.y);
 587                   else
 588                     sprite->walk_left->draw(base.x - scroll_x, base.y);
 589                 }
 590             }
 591
 592           // Draw arm overlay graphics when Tux is holding something
 593           if (holding_something && physic.get_velocity_y() == 0)
 594             {
 595               if (dir == RIGHT)
 596                 sprite->grab_right->draw(base.x - scroll_x, base.y);
 597               else
 598                 sprite->grab_left->draw(base.x - scroll_x, base.y);
 599             }
 600
 601           // Draw blinking star overlay
 602           if (invincible_timer.started() &&
 603              (invincible_timer.get_left() > TUX_INVINCIBLE_TIME_WARNING || global_frame_counter % 3))
 604             {
 605               if (size == SMALL || duck)
 606                 smalltux_star->draw(base.x - scroll_x, base.y);
 607               else
 608                 largetux_star->draw(base.x - scroll_x, base.y);
 609             }
 610         }
 611     }
 612
 613   if (debug_mode)
 614     fillrect(base.x - scroll_x, base.y,
 615              base.width, base.height, 75,75,75, 150);
 616 }
 617
 618 void
 619 Player::collision(void* p_c_object, int c_object)
 620 {
 621   BadGuy* pbad_c = NULL;
 622
 623   switch (c_object)
 624     {
 625     case CO_BADGUY:
 626       pbad_c = (BadGuy*) p_c_object;
 627
 628      /* Hurt player if he touches a badguy */
 629       if (!pbad_c->dying && !dying &&
 630           !safe_timer.started() &&
 631           pbad_c->mode != BadGuy::HELD)
 632         {
 633           if (pbad_c->mode == BadGuy::FLAT && input.fire == DOWN
 634                && !holding_something)
 635             {
 636               holding_something = true;
 637               pbad_c->mode = BadGuy::HELD;
 638               pbad_c->base.y-=8;
 639             }
 640           else if (pbad_c->mode == BadGuy::FLAT)
 641             {
 642               // Don't get hurt if we're kicking a flat badguy!
 643             }
 644           else if (pbad_c->mode == BadGuy::KICK)
 645             {
 646               /* Hurt if you get hit by kicked laptop: */
 647               if (!invincible_timer.started())
 648                 {
 649                   kill(SHRINK);
 650                 }
 651               else
 652                 {
 653                    pbad_c->dying = DYING_FALLING;
 654                    play_sound(sounds[SND_FALL], SOUND_CENTER_SPEAKER);
 655                    World::current()->add_score(pbad_c->base.x - scroll_x,
 656                                                pbad_c->base.y,
 657                                                25 * player_status.score_multiplier);
 658                 }
 659             }
 660           else
 661             {
 662               if (!invincible_timer.started())
 663                 {
 664                   kill(SHRINK);
 665                 }
 666               else
 667                 {
 668                   pbad_c->kill_me(25);
 669                 }
 670             }
 671           player_status.score_multiplier++;
 672         }
 673       break;
 674     default:
 675       break;
 676     }
 677
 678 }
 679
 680 /* Kill Player! */
 681
 682 void
 683 Player::kill(HurtMode mode)
 684 {
 685   play_sound(sounds[SND_HURT], SOUND_CENTER_SPEAKER);
 686
 687   physic.set_velocity_x(0);
 688
 689   if (mode == SHRINK && size == BIG)
 690     {
 691       if (got_coffee)
 692         {
 693           got_coffee = false;
 694         }
 695       else
 696         {
 697           size = SMALL;
 698           base.height = 32;
 699           duck = false;
 700         }
 701       safe_timer.start(TUX_SAFE_TIME);
 702     }
 703   else
 704     {
 705       physic.enable_gravity(true);
 706       physic.set_acceleration(0, 0);
 707       physic.set_velocity(0, 7);
 708       dying = DYING_SQUISHED;
 709     }
 710 }
 711
 712 void
 713 Player::is_dying()
 714 {
 715   remove_powerups();
 716   dying = DYING_NOT;
 717 }
 718
 719 bool Player::is_dead()
 720 {
 721   if(base.y > screen->h)
 722     return true;
 723   else
 724     return false;
 725 }
 726
 727 /* Remove Tux's power ups */
 728 void
 729 Player::remove_powerups()
 730 {
 731   got_coffee = false;
 732   size = SMALL;
 733   base.height = 32;
 734 }
 735
 736 void
 737 Player::check_bounds()
 738 {
 739   /* Keep tux in bounds: */
 740   if (base.x < 0)
 741     { // Lock Tux to the size of the level, so that he doesn't fall of
 742       // on the left side
 743       base.x = 0;
 744     }
 745
 746   /* Keep in-bounds, vertically: */
 747   if (base.y > screen->h)
 748     {
 749       kill(KILL);
 750     }
 751
 752   if(base.x < scroll_x)  // can happen if back scrolling is disabled
 753     base.x = scroll_x;
 754 }
 755
 756 // EOF //
 757