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 Surface* img_bullet;
  26 Surface* img_golden_herring;
  27 Surface* img_growup;
  28 Surface* img_iceflower;
  29 Surface* img_1up;
  30
  31 #define GROWUP_SPEED 1.0f
  32
  33 void
  34 Bullet::init(float x, float y, float xm, int dir)
  35 {
  36   base.width = 4;
  37   base.height = 4;
  38
  39   if (dir == RIGHT)
  40     {
  41       base.x = x + 32;
  42       base.xm = BULLET_XM + xm;
  43     }
  44   else
  45     {
  46       base.x = x;
  47       base.xm = -BULLET_XM + xm;
  48     }
  49
  50   base.y = y;
  51   base.ym = BULLET_STARTING_YM;
  52   old_base = base;
  53 }
  54
  55 void
  56 Bullet::remove_me()
  57 {
  58   std::vector<Bullet>& bullets = World::current()->bullets;
  59   for(std::vector<Bullet>::iterator i = bullets.begin();
  60          i != bullets.end(); ++i) {
  61     if( & (*i) == this) {
  62       bullets.erase(i);
  63       return;
  64     }
  65   }
  66
  67   assert(false);
  68 }
  69
  70 void
  71 Bullet::action(double frame_ratio)
  72 {
  73   base.x = base.x + base.xm * frame_ratio;
  74   base.y = base.y + base.ym * frame_ratio;
  75
  76   collision_swept_object_map(&old_base,&base);
  77
  78   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  79     {
  80       base.ym = -base.ym;
  81       base.y = (int)(base.y / 32) * 32;
  82     }
  83
  84   base.ym = base.ym + GRAVITY;
  85
  86   if (base.x < scroll_x ||
  87       base.x > scroll_x + screen->w ||
  88       base.y < 0 ||
  89       base.y > screen->h ||
  90       issolid(base.x + 4, base.y + 2) ||
  91       issolid(base.x, base.y + 2))
  92     {
  93       remove_me();
  94     }
  95
  96 }
  97
  98 void
  99 Bullet::draw()
 100 {
 101   if (base.x >= scroll_x - base.width &&
 102       base.x <= scroll_x + screen->w)
 103     {
 104       img_bullet->draw( base.x - scroll_x, base.y, 255,
 105                    NO_UPDATE);
 106     }
 107 }
 108
 109 void
 110 Bullet::collision(int c_object)
 111 {
 112   if(c_object == CO_BADGUY) {
 113     remove_me();
 114   }
 115 }
 116
 117 void
 118 Upgrade::init(float x_, float y_, int dir_, UpgradeKind kind_)
 119 {
 120   kind = kind_;
 121   dir = dir_;
 122
 123   base.width = 32;
 124   base.height = 0;
 125   base.x = x_;
 126   base.y = y_;
 127   old_base = base;
 128
 129   physic.reset();
 130   physic.enable_gravity(false);
 131
 132   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 133     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 134     physic.enable_gravity(true);
 135     base.height = 32;
 136   } else if (kind == UPGRADE_ICEFLOWER) {
 137     // nothing
 138   } else if (kind == UPGRADE_GROWUP) {
 139     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 140   } else {
 141     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 142   }
 143 }
 144
 145 void
 146 Upgrade::remove_me()
 147 {
 148   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 149   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 150          i != upgrades.end(); ++i) {
 151     if( & (*i) == this) {
 152       upgrades.erase(i);
 153       return;
 154     }
 155   }
 156
 157   assert(false);
 158 }
 159
 160 void
 161 Upgrade::action(double frame_ratio)
 162 {
 163   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 164     if (base.height < 32) {
 165       /* Rise up! */
 166       base.height = base.height + 0.7 * frame_ratio;
 167       if(base.height > 32)
 168         base.height = 32;
 169
 170       return;
 171     }
 172   }
 173
 174   /* Off screen? Kill it! */
 175   if(base.x < scroll_x - base.width || base.y > screen->h) {
 176     remove_me();
 177     return;
 178   }
 179
 180   /* Move around? */
 181   physic.apply(frame_ratio, base.x, base.y);
 182   if(kind == UPGRADE_GROWUP) {
 183     collision_swept_object_map(&old_base, &base);
 184   }
 185
 186   // fall down?
 187   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 188     // falling?
 189     if(physic.get_velocity_y() != 0) {
 190       if(issolid(base.x, base.y + base.height)) {
 191         base.y = int(base.y / 32) * 32;
 192         old_base = base;
 193         if(kind == UPGRADE_GROWUP) {
 194           physic.enable_gravity(false);
 195           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 196         } else if(kind == UPGRADE_HERRING) {
 197           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 198         }
 199       }
 200     } else {
 201       if((physic.get_velocity_x() < 0
 202             && !issolid(base.x+base.width, base.y + base.height))
 203         || (physic.get_velocity_x() > 0
 204             && !issolid(base.x, base.y + base.height))) {
 205         physic.enable_gravity(true);
 206       }
 207     }
 208   }
 209
 210   // horizontal bounce?
 211   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 212     if (  (physic.get_velocity_x() < 0
 213           && issolid(base.x, (int) base.y + base.height/2))
 214         ||  (physic.get_velocity_x() > 0
 215           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 216         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 217         dir = dir == LEFT ? RIGHT : LEFT;
 218     }
 219   }
 220 }
 221
 222 void
 223 Upgrade::draw()
 224 {
 225   SDL_Rect dest;
 226   if (base.height < 32)
 227     {
 228       /* Rising up... */
 229
 230       dest.x = (int)(base.x - scroll_x);
 231       dest.y = (int)(base.y + 32 - base.height);
 232       dest.w = 32;
 233       dest.h = (int)base.height;
 234
 235       if (kind == UPGRADE_GROWUP)
 236         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 237       else if (kind == UPGRADE_ICEFLOWER)
 238         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 239       else if (kind == UPGRADE_HERRING)
 240         img_golden_herring->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 241       else if (kind == UPGRADE_1UP)
 242         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 243     }
 244   else
 245     {
 246       if (kind == UPGRADE_GROWUP)
 247         {
 248           img_growup->draw(
 249                        base.x - scroll_x, base.y);
 250         }
 251       else if (kind == UPGRADE_ICEFLOWER)
 252         {
 253           img_iceflower->draw(
 254                        base.x - scroll_x, base.y);
 255         }
 256       else if (kind == UPGRADE_HERRING)
 257         {
 258           img_golden_herring->draw(
 259                        base.x - scroll_x, base.y);
 260         }
 261       else if (kind == UPGRADE_1UP)
 262         {
 263           img_1up->draw( base.x - scroll_x, base.y);
 264         }
 265     }
 266 }
 267
 268 void
 269 Upgrade::collision(void* p_c_object, int c_object)
 270 {
 271   Player* pplayer = NULL;
 272
 273   switch (c_object)
 274     {
 275     case CO_PLAYER:
 276       /* Remove the upgrade: */
 277
 278       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 279       pplayer = (Player*) p_c_object;
 280
 281       /* Affect the player: */
 282
 283       if (kind == UPGRADE_GROWUP)
 284         {
 285           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 286           pplayer->size = BIG;
 287           pplayer->base.height = 64;
 288           pplayer->base.y -= 32;
 289           if(collision_object_map(&pplayer->base))
 290             {
 291               pplayer->base.height = 32;
 292               pplayer->base.y += 32;
 293               pplayer->duck = true;
 294             }
 295         }
 296       else if (kind == UPGRADE_ICEFLOWER)
 297         {
 298           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 299           pplayer->got_coffee = true;
 300         }
 301       else if (kind == UPGRADE_HERRING)
 302         {
 303           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 304           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 305           /* play the herring song ^^ */
 306           if (get_current_music() != HURRYUP_MUSIC)
 307             {
 308               set_current_music(HERRING_MUSIC);
 309               play_current_music();
 310             }
 311         }
 312       else if (kind == UPGRADE_1UP)
 313         {
 314           if(player_status.lives < MAX_LIVES) {
 315             player_status.lives++;
 316             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 317           }
 318         }
 319
 320       remove_me();
 321       return;
 322     }
 323 }
 324
 325 void load_special_gfx()
 326 {
 327     img_growup = new Surface(datadir + "/images/shared/egg.png", USE_ALPHA);
 328     img_iceflower = new Surface(datadir + "/images/shared/iceflower.png",
 329             USE_ALPHA);
 330     img_golden_herring = new Surface(datadir + "/images/shared/star.png", USE_ALPHA);
 331     img_1up = new Surface(datadir + "/images/shared/1up.png",
 332             USE_ALPHA);
 333
 334     img_bullet = new Surface(datadir + "/images/shared/bullet.png",
 335             USE_ALPHA);
 336 }
 337
 338 void free_special_gfx()
 339 {
 340     delete img_growup;
 341     delete img_iceflower;
 342     delete img_1up;
 343     delete img_golden_herring;
 344     delete img_bullet;
 345 }
 346