src/bullets.cpp

   1 /*
   2 Copyright (C) 2004-2011 Parallel Realities
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #include "bullets.h"
  22
  23 void addBullet(Entity *owner, float dx, float dy)
  24 {
  25         if (!(owner->flags & ENT_BOSS))
  26         {
  27                 if (owner->environment == ENV_WATER)
  28                 {
  29                         if ((owner->currentWeapon != &weapon[WP_PISTOL]) && (owner->currentWeapon != &weapon[WP_AIMEDPISTOL]))
  30                         {
  31                                 return;
  32                         }
  33                 }
  34         }
  35
  36         Entity *bullet = new Entity();
  37
  38         bullet->x = owner->x;
  39         bullet->y = owner->y;// + owner->dy;
  40
  41         if (owner != &engine.world)
  42         {
  43                 bullet->x += (owner->width / 2);
  44                 bullet->y += (owner->height / 2);
  45         }
  46
  47         bullet->setName(owner->currentWeapon->name);
  48         bullet->id = owner->currentWeapon->id;
  49         bullet->dx = dx;
  50         bullet->dy = owner->currentWeapon->dy + dy;
  51         bullet->next = NULL;
  52         bullet->health = owner->currentWeapon->health;
  53         bullet->damage = owner->currentWeapon->damage;
  54         bullet->setSprites(owner->currentWeapon->sprite[0], owner->currentWeapon->sprite[1], owner->currentWeapon->sprite[1]);
  55         bullet->face = owner->face;
  56         bullet->owner = owner;
  57         bullet->flags = owner->currentWeapon->flags + ENT_SPARKS + ENT_BULLET + ((owner->flags & ENT_BOSS) ? ENT_BOSS : 0);
  58
  59         if (bullet->flags & ENT_EXPLODES)
  60         {
  61                 bullet->deathSound = SND_GRENADE;
  62         }
  63         else if (owner->currentWeapon->fireSound > -1)
  64         {
  65                 if ((Math::prand() % 2) == 0)
  66                 {
  67                         bullet->deathSound = SND_RICO1;
  68                 }
  69                 else
  70                 {
  71                         bullet->deathSound = SND_RICO2;
  72                 }
  73         }
  74
  75         // cheating here!
  76         if (owner->currentWeapon->id == WP_STALAGTITE)
  77         {
  78                 bullet->deathSound = SND_STONEBREAK;
  79         }
  80
  81         if (owner->currentWeapon->fireSound > -1)
  82         {
  83                 audio.playSound(owner->currentWeapon->fireSound, CH_WEAPON);
  84         }
  85
  86         if (owner->flags & ENT_AIMS)
  87         {
  88                 Math::calculateSlope(player.x + Math::rrand(-20, 20), player.y + Math::rrand(-20, 20), bullet->x, bullet->y, &bullet->dx, &bullet->dy);
  89                 bullet->dx *= owner->currentWeapon->dx;
  90                 bullet->dy *= owner->currentWeapon->dy;
  91         }
  92
  93         map.addBullet(bullet);
  94
  95         // Adjust the reload time of enemies according to difficulty level
  96         owner->reload = owner->currentWeapon->reload;
  97
  98         if ((owner != &player) && (game.skill < 3))
  99         {
 100                 owner->reload *= (3 - game.skill);
 101         }
 102
 103         if (owner->flags & ENT_ALWAYSFIRES)
 104         {
 105                 owner->reload = 10;
 106         }
 107
 108         if (owner == &player)
 109         {
 110                 game.incBulletsFired();
 111
 112                 if (engine.cheatReload)
 113                 {
 114                         owner->reload = 4;
 115                 }
 116
 117                 if (game.bulletsFired[game.currentWeapon] == 10000)
 118                 {
 119                         presentPlayerMedal("10000_Bullets");
 120                 }
 121         }
 122 }
 123
 124 void destroyBullet(Entity *bullet)
 125 {
 126         if (bullet->deathSound == -1)
 127         {
 128                 return;
 129         }
 130
 131         bullet->health = 0;
 132
 133         if (bullet->flags & ENT_SPARKS)
 134         {
 135                 audio.playSound(bullet->deathSound, CH_TOUCH);
 136         }
 137
 138         if (bullet->flags & ENT_EXPLODES)
 139         {
 140                 addExplosion(bullet->x + (bullet->width / 2), bullet->y + (bullet->height / 2), bullet->damage, bullet->owner);
 141         }
 142
 143         if (bullet->id == WP_STALAGTITE)
 144         {
 145                 throwStalagParticles(bullet->x, bullet->y);
 146         }
 147
 148         float dx, dy;
 149
 150         for (int i = 0 ; i < 3 ; i++)
 151         {
 152                 dx = Math::rrand(-30, 30); dx /= 12;
 153                 dy = Math::rrand(-30, 30); dy /= 12;
 154
 155                 if (bullet->flags & ENT_SPARKS)
 156                 {
 157                         map.addParticle(bullet->x, bullet->y, dx, dy, Math::rrand(5, 30), graphics.white, NULL, 0);
 158                 }
 159                 else
 160                 {
 161                         map.addParticle(bullet->x, bullet->y, dx, dy, Math::rrand(5, 30), graphics.red, NULL, 0);
 162                 }
 163         }
 164 }
 165
 166 // Just a little convinence function!
 167 void removeBullet(Entity *bullet)
 168 {
 169         bullet->health = 0;
 170         bullet->deathSound = -1;
 171         Math::removeBit(&bullet->flags, ENT_SPARKS);
 172         Math::removeBit(&bullet->flags, ENT_PUFFS);
 173         Math::removeBit(&bullet->flags, ENT_EXPLODES);
 174 }
 175
 176 void bounceBullet(Entity *bullet, float dx, float dy)
 177 {
 178         if (dx)
 179         {
 180                 bullet->dx = -bullet->dx;
 181                 bullet->x += bullet->dx;
 182                 if (bullet->id != WP_LASER)
 183                 {
 184                         bullet->dx *= 0.75;
 185                         audio.playSound(SND_GRBOUNCE, CH_TOUCH);
 186                 }
 187                 bullet->face = !bullet->face;
 188         }
 189
 190         if (dy)
 191         {
 192                 bullet->dy = -bullet->dy;
 193                 bullet->y += bullet->dy;
 194
 195                 Math::limitFloat(&bullet->dy, -4, 4);
 196
 197                 if ((bullet->dy > -2) && (bullet->dy <= 0)) bullet->dy = -2;
 198                 if ((bullet->dy > 0) && (bullet->dy < 2)) bullet->dy = 2;
 199
 200                 if (bullet->id != WP_LASER)
 201                 {
 202                         bullet->dy *= 0.75;
 203                         audio.playSound(SND_GRBOUNCE, CH_TOUCH);
 204                 }
 205
 206                 if ((bullet->dy > -2) && (bullet->dy <= 0)) bullet->dy = -2;
 207                 if ((bullet->dy > 0) && (bullet->dy < 2)) bullet->dy = 2;
 208
 209                 bullet->face = !bullet->face;
 210         }
 211 }
 212
 213 bool bulletHasCollided(Entity *bullet, float dx, float dy)
 214 {
 215         bullet->x += dx;
 216         bullet->y += dy;
 217
 218         int x = (int)bullet->x >> BRICKSHIFT;
 219         int y = (int)bullet->y >> BRICKSHIFT;
 220
 221         if ((x < 0) || (y < 0))
 222         {
 223                 removeBullet(bullet);
 224         }
 225         else
 226         {
 227                 if (map.isSolid(x, y))
 228                 {
 229                         if (map.isBreakable(x, y))
 230                         {
 231                                 if (bullet->flags & ENT_EXPLODES)
 232                                 {
 233                                         Math::removeBit(&bullet->flags, ENT_BOUNCES);
 234                                         map.data[x][y] = MAP_AIR;
 235                                         audio.playSound(SND_STONEBREAK, CH_EXPLODE);
 236                                         throwBrickParticles(x << BRICKSHIFT, y << BRICKSHIFT);
 237                                 }
 238                                 else
 239                                 {
 240                                         if ((Math::prand() % 2) == 0)
 241                                         {
 242                                                 map.data[x][y] = MAP_AIR;
 243                                                 audio.playSound(SND_STONEBREAK, CH_EXPLODE);
 244                                                 throwBrickParticles(x << BRICKSHIFT, y << BRICKSHIFT);
 245                                         }
 246                                 }
 247                         }
 248
 249                         if (bullet->flags & ENT_BOUNCES)
 250                         {
 251                                 bounceBullet(bullet, dx, dy);
 252                         }
 253
 254                         return true;
 255                 }
 256         }
 257
 258         enemyBulletCollisions(bullet);
 259
 260         checkPlayerBulletCollisions(bullet);
 261
 262         checkBossBulletCollisions(bullet);
 263
 264         checkSwitchContact(bullet);
 265
 266         if ((checkTrainContact(bullet, 0)) || (checkObstacleContact(bullet, 0)))
 267         {
 268                 if (bullet->flags & ENT_BOUNCES)
 269                         bounceBullet(bullet, dx, dy);
 270                 return true;
 271         }
 272
 273         return false;
 274 }
 275
 276 void doBullets()
 277 {
 278         Entity *bullet = (Entity*)map.bulletList.getHead();
 279         Entity *previous = bullet;
 280
 281         int x, y;
 282
 283         while (bullet->next != NULL)
 284         {
 285                 bullet = (Entity*)bullet->next;
 286
 287                 bullet->owner->referenced = true;
 288
 289                 x = (int)(bullet->x - engine.playerPosX);
 290                 y = (int)(bullet->y - engine.playerPosY);
 291
 292                 graphics.blit(bullet->getFaceImage(), x, y, graphics.screen, true);
 293                 bullet->animate();
 294
 295                 if (bullet->flags & ENT_ONFIRE)
 296                 {
 297                         addFireParticles(bullet->x + Math::rrand(-8, 8), bullet->y + Math::rrand(-8, 8), 1);
 298                 }
 299
 300                 if (bullet->flags & ENT_FIRETRAIL)
 301                 {
 302                         addFireTrailParticle(bullet->x, bullet->y);
 303                 }
 304
 305                 if (bullet->flags & ENT_PARTICLETRAIL)
 306                 {
 307                         addColorParticles(x, y, -1, 3);
 308                 }
 309
 310                 if (bullet->owner == &player)
 311                 {
 312                         if ((x < -160) || (y < -120) || (x > 800) || (y > 600))
 313                         {
 314                                 removeBullet(bullet);
 315                         }
 316                 }
 317
 318                 if (bulletHasCollided(bullet, bullet->dx, 0))
 319                 {
 320                         if (!(bullet->flags & ENT_BOUNCES))
 321                         {
 322                                 bullet->health = 0;
 323                         }
 324                 }
 325
 326                 if (bulletHasCollided(bullet, 0, bullet->dy))
 327                 {
 328                         if (!(bullet->flags & ENT_BOUNCES))
 329                         {
 330                                 bullet->health = 0;
 331                         }
 332                 }
 333
 334                 bullet->health--;
 335
 336                 if (bullet->health == 0)
 337                 {
 338                         Math::removeBit(&bullet->flags, ENT_SPARKS);
 339                         Math::removeBit(&bullet->flags, ENT_PUFFS);
 340                 }
 341
 342                 if (!(bullet->flags & ENT_WEIGHTLESS))
 343                 {
 344                         bullet->dy += 0.1;
 345                 }
 346
 347                 if (bullet->health > 0)
 348                 {
 349                         previous = bullet;
 350                 }
 351                 else
 352                 {
 353                         destroyBullet(bullet);
 354                         map.bulletList.remove(previous, bullet);
 355                         bullet = previous;
 356                 }
 357         }
 358 }
 359