src/special.cpp

   1 //
   2 // C Implementation: special
   3 //
   4 // Description:
   5 //
   6 //
   7 // Author: Tobias Glaesser <tobi.web@gmx.de> & Bill Kendrick, (C) 2004
   8 //
   9 // Copyright: See COPYING file that comes with this distribution
  10 //
  11 //
  12
  13 #include <assert.h>
  14 #include "SDL.h"
  15 #include "defines.h"
  16 #include "special.h"
  17 #include "gameloop.h"
  18 #include "screen.h"
  19 #include "sound.h"
  20 #include "scene.h"
  21 #include "globals.h"
  22 #include "player.h"
  23 #include "resources.h"
  24
  25 texture_type img_bullet;
  26 texture_type img_golden_herring;
  27 texture_type img_growup;
  28 texture_type img_iceflower;
  29 texture_type img_1up;
  30
  31 void
  32 Bullet::init(float x, float y, float xm, int dir)
  33 {
  34   base.width = 4;
  35   base.height = 4;
  36
  37   if (dir == RIGHT)
  38     {
  39       base.x = x + 32;
  40       base.xm = BULLET_XM + xm;
  41     }
  42   else
  43     {
  44       base.x = x;
  45       base.xm = -BULLET_XM + xm;
  46     }
  47
  48   base.y = y;
  49   base.ym = BULLET_STARTING_YM;
  50   old_base = base;
  51 }
  52
  53 void
  54 Bullet::remove_me()
  55 {
  56   std::vector<Bullet>& bullets = World::current()->bullets;
  57   for(std::vector<Bullet>::iterator i = bullets.begin();
  58          i != bullets.end(); ++i) {
  59     if( & (*i) == this) {
  60       bullets.erase(i);
  61       return;
  62     }
  63   }
  64
  65   assert(false);
  66 }
  67
  68 void
  69 Bullet::action(double frame_ratio)
  70 {
  71   base.x = base.x + base.xm * frame_ratio;
  72   base.y = base.y + base.ym * frame_ratio;
  73
  74   collision_swept_object_map(&old_base,&base);
  75
  76   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  77     {
  78       base.ym = -base.ym;
  79       base.y = (int)(base.y / 32) * 32;
  80     }
  81
  82   base.ym = base.ym + GRAVITY;
  83
  84   if (base.x < scroll_x ||
  85       base.x > scroll_x + screen->w ||
  86       base.y < 0 ||
  87       base.y > screen->h ||
  88       issolid(base.x + 4, base.y + 2) ||
  89       issolid(base.x, base.y + 2))
  90     {
  91       remove_me();
  92     }
  93
  94 }
  95
  96 void
  97 Bullet::draw()
  98 {
  99   if (base.x >= scroll_x - base.width &&
 100       base.x <= scroll_x + screen->w)
 101     {
 102       texture_draw(&img_bullet, base.x - scroll_x, base.y, 255,
 103                    NO_UPDATE);
 104     }
 105 }
 106
 107 void
 108 Bullet::collision(int c_object)
 109 {
 110   if(c_object == CO_BADGUY) {
 111     remove_me();
 112   }
 113 }
 114
 115 void
 116 Upgrade::init(float x_, float y_, int dir_, int kind_)
 117 {
 118   kind = kind_;
 119   dir = dir_;
 120
 121   base.width = 32;
 122   base.height = 0;
 123   base.x = x_;
 124   base.y = y_;
 125   old_base = base;
 126
 127   physic.reset();
 128   physic.enable_gravity(false);
 129
 130   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 131     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 132     physic.enable_gravity(true);
 133     base.height = 32;
 134   } else if (kind == UPGRADE_ICEFLOWER) {
 135     // nothing
 136   } else {
 137     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 138   }
 139 }
 140
 141 void
 142 Upgrade::remove_me()
 143 {
 144   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 145   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 146          i != upgrades.end(); ++i) {
 147     if( & (*i) == this) {
 148       upgrades.erase(i);
 149       return;
 150     }
 151   }
 152
 153   assert(false);
 154 }
 155
 156 void
 157 Upgrade::action(double frame_ratio)
 158 {
 159   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 160     if (base.height < 32) {
 161       /* Rise up! */
 162       base.height = base.height + 0.7 * frame_ratio;
 163       if(base.height > 32)
 164         base.height = 32;
 165
 166       return;
 167     }
 168   }
 169
 170   /* Off screen? Kill it! */
 171   if(base.x < scroll_x - base.width || base.y > screen->h) {
 172     remove_me();
 173     return;
 174   }
 175
 176   /* Move around? */
 177   physic.apply(frame_ratio, base.x, base.y);
 178   if(kind == UPGRADE_GROWUP) {
 179     collision_swept_object_map(&old_base, &base);
 180   }
 181
 182   // fall down?
 183   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 184     // falling?
 185     if(physic.get_velocity_y() != 0) {
 186       if(issolid(base.x, base.y + base.height)) {
 187         base.y = int(base.y / 32) * 32;
 188         old_base = base;
 189         if(kind == UPGRADE_GROWUP) {
 190           physic.enable_gravity(false);
 191           physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 192         } else if(kind == UPGRADE_HERRING) {
 193           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 194         }
 195       }
 196     } else {
 197       if((physic.get_velocity_x() < 0
 198             && !issolid(base.x+base.width, base.y + base.height))
 199         || (physic.get_velocity_x() > 0
 200             && !issolid(base.x, base.y + base.height))) {
 201         physic.enable_gravity(true);
 202         physic.set_velocity(0, physic.get_velocity_y());
 203       }
 204     }
 205   }
 206
 207   // horizontal bounce?
 208   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 209     if (  (physic.get_velocity_x() < 0
 210           && issolid(base.x, (int) base.y + base.height/2))
 211         ||  (physic.get_velocity_x() > 0
 212           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 213         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 214         dir = dir == LEFT ? RIGHT : LEFT;
 215     }
 216   }
 217 }
 218
 219 void
 220 Upgrade::draw()
 221 {
 222   SDL_Rect dest;
 223   if (base.height < 32)
 224     {
 225       /* Rising up... */
 226
 227       dest.x = (int)(base.x - scroll_x);
 228       dest.y = (int)(base.y + 32 - base.height);
 229       dest.w = 32;
 230       dest.h = (int)base.height;
 231
 232       if (kind == UPGRADE_GROWUP)
 233         texture_draw_part(&img_growup,0,0,dest.x,dest.y,dest.w,dest.h);
 234       else if (kind == UPGRADE_ICEFLOWER)
 235         texture_draw_part(&img_iceflower,0,0,dest.x,dest.y,dest.w,dest.h);
 236       else if (kind == UPGRADE_HERRING)
 237         texture_draw_part(&img_golden_herring,0,0,dest.x,dest.y,dest.w,dest.h);
 238       else if (kind == UPGRADE_1UP)
 239         texture_draw_part(&img_1up, 0, 0, dest.x, dest.y, dest.w, dest.h);
 240     }
 241   else
 242     {
 243       if (kind == UPGRADE_GROWUP)
 244         {
 245           texture_draw(&img_growup,
 246                        base.x - scroll_x, base.y);
 247         }
 248       else if (kind == UPGRADE_ICEFLOWER)
 249         {
 250           texture_draw(&img_iceflower,
 251                        base.x - scroll_x, base.y);
 252         }
 253       else if (kind == UPGRADE_HERRING)
 254         {
 255           texture_draw(&img_golden_herring,
 256                        base.x - scroll_x, base.y);
 257         }
 258       else if (kind == UPGRADE_1UP)
 259         {
 260           texture_draw(&img_1up, base.x - scroll_x, base.y);
 261         }
 262     }
 263 }
 264
 265 void
 266 Upgrade::collision(void* p_c_object, int c_object)
 267 {
 268   Player* pplayer = NULL;
 269
 270   switch (c_object)
 271     {
 272     case CO_PLAYER:
 273       /* Remove the upgrade: */
 274
 275       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 276       pplayer = (Player*) p_c_object;
 277
 278       /* Affect the player: */
 279
 280       if (kind == UPGRADE_GROWUP)
 281         {
 282           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 283           pplayer->size = BIG;
 284           pplayer->base.height = 64;
 285           pplayer->base.y -= 32;
 286           if(collision_object_map(&pplayer->base))
 287             {
 288               pplayer->base.height = 32;
 289               pplayer->base.y += 32;
 290               pplayer->duck = true;
 291             }
 292         }
 293       else if (kind == UPGRADE_ICEFLOWER)
 294         {
 295           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 296           pplayer->got_coffee = true;
 297         }
 298       else if (kind == UPGRADE_HERRING)
 299         {
 300           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 301           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 302           /* play the herring song ^^ */
 303           if (get_current_music() != HURRYUP_MUSIC)
 304             {
 305               set_current_music(HERRING_MUSIC);
 306               play_current_music();
 307             }
 308         }
 309       else if (kind == UPGRADE_1UP)
 310         {
 311           if(pplayer->lives < MAX_LIVES) {
 312             pplayer->lives++;
 313             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 314           }
 315         }
 316
 317       remove_me();
 318       return;
 319     }
 320 }
 321
 322 void load_special_gfx()
 323 {
 324     texture_load(&img_growup, datadir + "/images/shared/egg.png", USE_ALPHA);
 325     texture_load(&img_iceflower, datadir + "/images/shared/iceflower.png",
 326             USE_ALPHA);
 327     texture_load(&img_golden_herring, datadir +
 328             "/images/shared/star.png", USE_ALPHA);
 329     texture_load(&img_1up, datadir + "/images/shared/1up.png",
 330             USE_ALPHA);
 331
 332     texture_load(&img_bullet, datadir + "/images/shared/bullet.png",
 333             USE_ALPHA);
 334 }
 335
 336 void free_special_gfx()
 337 {
 338     texture_free(&img_growup);
 339     texture_free(&img_iceflower);
 340     texture_free(&img_1up);
 341     texture_free(&img_golden_herring);
 342     texture_free(&img_bullet);
 343 }
 344