src/special.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 <assert.h>
  21 #include <iostream>
  22 #include "SDL.h"
  23 #include "defines.h"
  24 #include "special.h"
  25 #include "gameloop.h"
  26 #include "screen.h"
  27 #include "sound.h"
  28 #include "scene.h"
  29 #include "globals.h"
  30 #include "player.h"
  31 #include "sprite_manager.h"
  32 #include "resources.h"
  33
  34 Sprite* img_bullet;
  35 Sprite* img_star;
  36 Sprite* img_growup;
  37 Sprite* img_iceflower;
  38 Sprite* img_1up;
  39
  40 #define GROWUP_SPEED 1.0f
  41
  42 #define BULLET_STARTING_YM 0
  43 #define BULLET_XM 6
  44
  45 void
  46 Bullet::init(float x, float y, float xm, Direction dir)
  47 {
  48   life_count = 3;
  49   base.width = 4;
  50   base.height = 4;
  51
  52   if (dir == RIGHT)
  53     {
  54       base.x = x + 32;
  55       base.xm = BULLET_XM + xm;
  56     }
  57   else
  58     {
  59       base.x = x;
  60       base.xm = -BULLET_XM + xm;
  61     }
  62
  63   base.y = y;
  64   base.ym = BULLET_STARTING_YM;
  65   old_base = base;
  66 }
  67
  68 void
  69 Bullet::remove_me()
  70 {
  71   std::vector<Bullet>& bullets = World::current()->bullets;
  72   for(std::vector<Bullet>::iterator i = bullets.begin();
  73          i != bullets.end(); ++i) {
  74     if( & (*i) == this) {
  75       bullets.erase(i);
  76       return;
  77     }
  78   }
  79
  80   assert(false);
  81 }
  82
  83 void
  84 Bullet::action(double frame_ratio)
  85 {
  86   frame_ratio *= 0.5f;
  87
  88   float old_y = base.y;
  89
  90   base.x = base.x + base.xm * frame_ratio;
  91   base.y = base.y + base.ym * frame_ratio;
  92
  93   collision_swept_object_map(&old_base,&base);
  94
  95   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  96     {
  97       base.y  = old_y;
  98       base.ym = -base.ym;
  99       if (base.ym > 9)
 100         base.ym = 9;
 101       else if (base.ym < -9)
 102         base.ym = -9;
 103       life_count -= 1;
 104     }
 105
 106   base.ym = base.ym + 0.5 * frame_ratio;
 107
 108   if (base.x < scroll_x ||
 109       base.x > scroll_x + screen->w ||
 110       base.y < 0 ||
 111       base.y > screen->h ||
 112       issolid(base.x + 4, base.y + 2) ||
 113       issolid(base.x, base.y + 2) ||
 114       life_count <= 0)
 115     {
 116       remove_me();
 117     }
 118
 119 }
 120
 121 void
 122 Bullet::draw()
 123 {
 124   if (base.x >= scroll_x - base.width &&
 125       base.x <= scroll_x + screen->w)
 126     {
 127       img_bullet->draw(base.x - scroll_x, base.y);
 128     }
 129 }
 130
 131 void
 132 Bullet::collision(int c_object)
 133 {
 134   if(c_object == CO_BADGUY) {
 135     remove_me();
 136   }
 137 }
 138
 139 void
 140 Upgrade::init(float x_, float y_, Direction dir_, UpgradeKind kind_)
 141 {
 142   kind = kind_;
 143   dir = dir_;
 144
 145   base.width = 32;
 146   base.height = 0;
 147   base.x = x_;
 148   base.y = y_;
 149   old_base = base;
 150
 151   physic.reset();
 152   physic.enable_gravity(false);
 153
 154   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 155     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 156     physic.enable_gravity(true);
 157     base.height = 32;
 158   } else if (kind == UPGRADE_ICEFLOWER) {
 159     // nothing
 160   } else if (kind == UPGRADE_GROWUP) {
 161     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 162   } else {
 163     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 164   }
 165 }
 166
 167 void
 168 Upgrade::remove_me()
 169 {
 170   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 171   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 172          i != upgrades.end(); ++i) {
 173     if( & (*i) == this) {
 174       upgrades.erase(i);
 175       return;
 176     }
 177   }
 178
 179   assert(false);
 180 }
 181
 182 void
 183 Upgrade::action(double frame_ratio)
 184 {
 185   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 186     if (base.height < 32) {
 187       /* Rise up! */
 188       base.height = base.height + 0.7 * frame_ratio;
 189       if(base.height > 32)
 190         base.height = 32;
 191
 192       return;
 193     }
 194   }
 195
 196   /* Off screen? Kill it! */
 197   if(base.x < scroll_x - OFFSCREEN_DISTANCE) {
 198     // we don't remove growups for now, when off screen
 199     if(kind != UPGRADE_GROWUP) {
 200       remove_me();
 201       return;
 202     }
 203   }
 204   if(base.y > screen->h) {
 205     remove_me();
 206     return;
 207   }
 208
 209   /* Move around? */
 210   physic.apply(frame_ratio, base.x, base.y);
 211   if(kind == UPGRADE_GROWUP) {
 212     collision_swept_object_map(&old_base, &base);
 213   }
 214
 215   // fall down?
 216   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 217     // falling?
 218     if(physic.get_velocity_y() != 0) {
 219       if(issolid(base.x, base.y + base.height)) {
 220         base.y = int(base.y / 32) * 32;
 221         old_base = base;
 222         if(kind == UPGRADE_GROWUP) {
 223           physic.enable_gravity(false);
 224           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 225         } else if(kind == UPGRADE_HERRING) {
 226           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 227         }
 228       }
 229     } else {
 230       if((physic.get_velocity_x() < 0
 231             && !issolid(base.x+base.width, base.y + base.height))
 232         || (physic.get_velocity_x() > 0
 233             && !issolid(base.x, base.y + base.height))) {
 234         physic.enable_gravity(true);
 235       }
 236     }
 237   }
 238
 239   // horizontal bounce?
 240   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 241     if (  (physic.get_velocity_x() < 0
 242           && issolid(base.x, (int) base.y + base.height/2))
 243         ||  (physic.get_velocity_x() > 0
 244           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 245         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 246         dir = dir == LEFT ? RIGHT : LEFT;
 247     }
 248   }
 249 }
 250
 251 void
 252 Upgrade::draw()
 253 {
 254   SDL_Rect dest;
 255   if (base.height < 32)
 256     {
 257       /* Rising up... */
 258
 259       dest.x = (int)(base.x - scroll_x);
 260       dest.y = (int)(base.y + 32 - base.height);
 261       dest.w = 32;
 262       dest.h = (int)base.height;
 263
 264       if (kind == UPGRADE_GROWUP)
 265         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 266       else if (kind == UPGRADE_ICEFLOWER)
 267         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 268       else if (kind == UPGRADE_HERRING)
 269         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 270       else if (kind == UPGRADE_1UP)
 271         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 272     }
 273   else
 274     {
 275       if (kind == UPGRADE_GROWUP)
 276         {
 277           img_growup->draw(
 278                        base.x - scroll_x, base.y);
 279         }
 280       else if (kind == UPGRADE_ICEFLOWER)
 281         {
 282           img_iceflower->draw(
 283                        base.x - scroll_x, base.y);
 284         }
 285       else if (kind == UPGRADE_HERRING)
 286         {
 287           img_star->draw(
 288                        base.x - scroll_x, base.y);
 289         }
 290       else if (kind == UPGRADE_1UP)
 291         {
 292           img_1up->draw( base.x - scroll_x, base.y);
 293         }
 294     }
 295 }
 296
 297 void
 298 Upgrade::bump(Player* )
 299 {
 300   // these can't be bumped
 301   if(kind != UPGRADE_GROWUP)
 302     return;
 303
 304   play_sound(sounds[SND_BUMP_UPGRADE], SOUND_CENTER_SPEAKER);
 305
 306   // do a little jump and change direction
 307   physic.set_velocity(-physic.get_velocity_x(), 3);
 308   dir = dir == LEFT ? RIGHT : LEFT;
 309   physic.enable_gravity(true);
 310 }
 311
 312 void
 313 Upgrade::collision(void* p_c_object, int c_object, CollisionType type)
 314 {
 315   Player* pplayer = NULL;
 316
 317   if(type == COLLISION_BUMP) {
 318     if(c_object == CO_PLAYER)
 319       pplayer = (Player*) p_c_object;
 320     bump(pplayer);
 321     return;
 322   }
 323
 324   switch (c_object)
 325     {
 326     case CO_PLAYER:
 327       /* Remove the upgrade: */
 328
 329       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 330       pplayer = (Player*) p_c_object;
 331
 332       /* Affect the player: */
 333
 334       if (kind == UPGRADE_GROWUP)
 335         {
 336           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 337           pplayer->size = BIG;
 338           pplayer->base.height = 64;
 339           pplayer->base.y -= 32;
 340           if(collision_object_map(pplayer->base))
 341             {
 342               pplayer->base.height = 32;
 343               pplayer->base.y += 32;
 344               pplayer->duck = true;
 345             }
 346         }
 347       else if (kind == UPGRADE_ICEFLOWER)
 348         {
 349           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 350           pplayer->got_coffee = true;
 351           if (pplayer->size == SMALL)
 352             {
 353               pplayer->size = BIG;
 354               pplayer->base.height = 64;
 355               pplayer->base.y -= 32;
 356             }
 357           if(collision_object_map(pplayer->base))
 358             {
 359               pplayer->base.height = 32;
 360               pplayer->base.y += 32;
 361               pplayer->duck = true;
 362             }
 363         }
 364       else if (kind == UPGRADE_HERRING)
 365         {
 366           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 367           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 368           World::current()->play_music(HERRING_MUSIC);
 369         }
 370       else if (kind == UPGRADE_1UP)
 371         {
 372           if(player_status.lives < MAX_LIVES) {
 373             player_status.lives++;
 374             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 375           }
 376         }
 377
 378       remove_me();
 379       return;
 380     }
 381 }
 382
 383 void load_special_gfx()
 384 {
 385   img_growup    = sprite_manager->load("egg");
 386   img_iceflower = sprite_manager->load("iceflower");
 387   img_star      = sprite_manager->load("star");
 388   img_1up       = sprite_manager->load("1up");
 389
 390   img_bullet    = sprite_manager->load("bullet");
 391 }
 392
 393 void free_special_gfx()
 394 {
 395 }
 396