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 "sprite_manager.h"
  24 #include "resources.h"
  25
  26 Surface* img_bullet;
  27
  28 Sprite* img_star;
  29 Sprite* img_growup;
  30 Sprite* img_iceflower;
  31 Sprite* img_1up;
  32
  33 #define GROWUP_SPEED 1.0f
  34
  35 void
  36 Bullet::init(float x, float y, float xm, int dir)
  37 {
  38   base.width = 4;
  39   base.height = 4;
  40
  41   if (dir == RIGHT)
  42     {
  43       base.x = x + 32;
  44       base.xm = BULLET_XM + xm;
  45     }
  46   else
  47     {
  48       base.x = x;
  49       base.xm = -BULLET_XM + xm;
  50     }
  51
  52   base.y = y;
  53   base.ym = BULLET_STARTING_YM;
  54   old_base = base;
  55 }
  56
  57 void
  58 Bullet::remove_me()
  59 {
  60   std::vector<Bullet>& bullets = World::current()->bullets;
  61   for(std::vector<Bullet>::iterator i = bullets.begin();
  62          i != bullets.end(); ++i) {
  63     if( & (*i) == this) {
  64       bullets.erase(i);
  65       return;
  66     }
  67   }
  68
  69   assert(false);
  70 }
  71
  72 void
  73 Bullet::action(double frame_ratio)
  74 {
  75   base.x = base.x + base.xm * frame_ratio;
  76   base.y = base.y + base.ym * frame_ratio;
  77
  78   collision_swept_object_map(&old_base,&base);
  79
  80   if (issolid(base.x, base.y + 4) || issolid(base.x, base.y))
  81     {
  82       base.ym = -base.ym;
  83       base.y = (int)(base.y / 32) * 32;
  84     }
  85
  86   base.ym = base.ym + GRAVITY;
  87
  88   if (base.x < scroll_x ||
  89       base.x > scroll_x + screen->w ||
  90       base.y < 0 ||
  91       base.y > screen->h ||
  92       issolid(base.x + 4, base.y + 2) ||
  93       issolid(base.x, base.y + 2))
  94     {
  95       remove_me();
  96     }
  97
  98 }
  99
 100 void
 101 Bullet::draw()
 102 {
 103   if (base.x >= scroll_x - base.width &&
 104       base.x <= scroll_x + screen->w)
 105     {
 106       img_bullet->draw( base.x - scroll_x, base.y, 255,
 107                    NO_UPDATE);
 108     }
 109 }
 110
 111 void
 112 Bullet::collision(int c_object)
 113 {
 114   if(c_object == CO_BADGUY) {
 115     remove_me();
 116   }
 117 }
 118
 119 void
 120 Upgrade::init(float x_, float y_, int dir_, UpgradeKind kind_)
 121 {
 122   kind = kind_;
 123   dir = dir_;
 124
 125   base.width = 32;
 126   base.height = 0;
 127   base.x = x_;
 128   base.y = y_;
 129   old_base = base;
 130
 131   physic.reset();
 132   physic.enable_gravity(false);
 133
 134   if(kind == UPGRADE_1UP || kind == UPGRADE_HERRING) {
 135     physic.set_velocity(dir == LEFT ? -1 : 1, 4);
 136     physic.enable_gravity(true);
 137     base.height = 32;
 138   } else if (kind == UPGRADE_ICEFLOWER) {
 139     // nothing
 140   } else if (kind == UPGRADE_GROWUP) {
 141     physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 142   } else {
 143     physic.set_velocity(dir == LEFT ? -2 : 2, 0);
 144   }
 145 }
 146
 147 void
 148 Upgrade::remove_me()
 149 {
 150   std::vector<Upgrade>& upgrades = World::current()->upgrades;
 151   for(std::vector<Upgrade>::iterator i = upgrades.begin();
 152          i != upgrades.end(); ++i) {
 153     if( & (*i) == this) {
 154       upgrades.erase(i);
 155       return;
 156     }
 157   }
 158
 159   assert(false);
 160 }
 161
 162 void
 163 Upgrade::action(double frame_ratio)
 164 {
 165   if (kind == UPGRADE_ICEFLOWER || kind == UPGRADE_GROWUP) {
 166     if (base.height < 32) {
 167       /* Rise up! */
 168       base.height = base.height + 0.7 * frame_ratio;
 169       if(base.height > 32)
 170         base.height = 32;
 171
 172       return;
 173     }
 174   }
 175
 176   /* Off screen? Kill it! */
 177   if(base.x < scroll_x - base.width || base.y > screen->h) {
 178     remove_me();
 179     return;
 180   }
 181
 182   /* Move around? */
 183   physic.apply(frame_ratio, base.x, base.y);
 184   if(kind == UPGRADE_GROWUP) {
 185     collision_swept_object_map(&old_base, &base);
 186   }
 187
 188   // fall down?
 189   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 190     // falling?
 191     if(physic.get_velocity_y() != 0) {
 192       if(issolid(base.x, base.y + base.height)) {
 193         base.y = int(base.y / 32) * 32;
 194         old_base = base;
 195         if(kind == UPGRADE_GROWUP) {
 196           physic.enable_gravity(false);
 197           physic.set_velocity(dir == LEFT ? -GROWUP_SPEED : GROWUP_SPEED, 0);
 198         } else if(kind == UPGRADE_HERRING) {
 199           physic.set_velocity(dir == LEFT ? -2 : 2, 3);
 200         }
 201       }
 202     } else {
 203       if((physic.get_velocity_x() < 0
 204             && !issolid(base.x+base.width, base.y + base.height))
 205         || (physic.get_velocity_x() > 0
 206             && !issolid(base.x, base.y + base.height))) {
 207         physic.enable_gravity(true);
 208       }
 209     }
 210   }
 211
 212   // horizontal bounce?
 213   if(kind == UPGRADE_GROWUP || kind == UPGRADE_HERRING) {
 214     if (  (physic.get_velocity_x() < 0
 215           && issolid(base.x, (int) base.y + base.height/2))
 216         ||  (physic.get_velocity_x() > 0
 217           && issolid(base.x + base.width, (int) base.y + base.height/2))) {
 218         physic.set_velocity(-physic.get_velocity_x(),physic.get_velocity_y());
 219         dir = dir == LEFT ? RIGHT : LEFT;
 220     }
 221   }
 222 }
 223
 224 void
 225 Upgrade::draw()
 226 {
 227   SDL_Rect dest;
 228   if (base.height < 32)
 229     {
 230       /* Rising up... */
 231
 232       dest.x = (int)(base.x - scroll_x);
 233       dest.y = (int)(base.y + 32 - base.height);
 234       dest.w = 32;
 235       dest.h = (int)base.height;
 236
 237       if (kind == UPGRADE_GROWUP)
 238         img_growup->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 239       else if (kind == UPGRADE_ICEFLOWER)
 240         img_iceflower->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 241       else if (kind == UPGRADE_HERRING)
 242         img_star->draw_part(0,0,dest.x,dest.y,dest.w,dest.h);
 243       else if (kind == UPGRADE_1UP)
 244         img_1up->draw_part( 0, 0, dest.x, dest.y, dest.w, dest.h);
 245     }
 246   else
 247     {
 248       if (kind == UPGRADE_GROWUP)
 249         {
 250           img_growup->draw(
 251                        base.x - scroll_x, base.y);
 252         }
 253       else if (kind == UPGRADE_ICEFLOWER)
 254         {
 255           img_iceflower->draw(
 256                        base.x - scroll_x, base.y);
 257         }
 258       else if (kind == UPGRADE_HERRING)
 259         {
 260           img_star->draw(
 261                        base.x - scroll_x, base.y);
 262         }
 263       else if (kind == UPGRADE_1UP)
 264         {
 265           img_1up->draw( base.x - scroll_x, base.y);
 266         }
 267     }
 268 }
 269
 270 void
 271 Upgrade::collision(void* p_c_object, int c_object)
 272 {
 273   Player* pplayer = NULL;
 274
 275   switch (c_object)
 276     {
 277     case CO_PLAYER:
 278       /* Remove the upgrade: */
 279
 280       /* p_c_object is CO_PLAYER, so assign it to pplayer */
 281       pplayer = (Player*) p_c_object;
 282
 283       /* Affect the player: */
 284
 285       if (kind == UPGRADE_GROWUP)
 286         {
 287           play_sound(sounds[SND_EXCELLENT], SOUND_CENTER_SPEAKER);
 288           pplayer->size = BIG;
 289           pplayer->base.height = 64;
 290           pplayer->base.y -= 32;
 291           if(collision_object_map(&pplayer->base))
 292             {
 293               pplayer->base.height = 32;
 294               pplayer->base.y += 32;
 295               pplayer->duck = true;
 296             }
 297         }
 298       else if (kind == UPGRADE_ICEFLOWER)
 299         {
 300           play_sound(sounds[SND_COFFEE], SOUND_CENTER_SPEAKER);
 301           pplayer->got_coffee = true;
 302         }
 303       else if (kind == UPGRADE_HERRING)
 304         {
 305           play_sound(sounds[SND_HERRING], SOUND_CENTER_SPEAKER);
 306           pplayer->invincible_timer.start(TUX_INVINCIBLE_TIME);
 307           /* play the herring song ^^ */
 308           if (get_current_music() != HURRYUP_MUSIC)
 309             {
 310               set_current_music(HERRING_MUSIC);
 311               play_current_music();
 312             }
 313         }
 314       else if (kind == UPGRADE_1UP)
 315         {
 316           if(player_status.lives < MAX_LIVES) {
 317             player_status.lives++;
 318             play_sound(sounds[SND_LIFEUP], SOUND_CENTER_SPEAKER);
 319           }
 320         }
 321
 322       remove_me();
 323       return;
 324     }
 325 }
 326
 327 void load_special_gfx()
 328 {
 329   img_growup    = sprite_manager->load("egg");
 330   img_iceflower = sprite_manager->load("iceflower");
 331   img_star      = sprite_manager->load("star");
 332   img_1up       = sprite_manager->load("1up");
 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_bullet;
 341 }
 342