src/entities.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 "entities.h"
  22
  23 void throwAndDamageEntity(Entity *ent, int damage, int minDX, int maxDX, int DY)
  24 {
  25         if ((ent == &player) && (game.missionOver > 0))
  26         {
  27                 return;
  28         }
  29
  30         if (!(ent->flags & ENT_EXPLODES))
  31         {
  32                 audio.playSound(SND_HIT, CH_ANY);
  33                 for (int i = 0 ; i < 4 ; i++)
  34                 {
  35                         addBlood(ent, Math::rrand(-5, 5), Math::rrand(-6, -3), i);
  36                 }
  37         }
  38         else
  39         {
  40                 audio.playSound(SND_CLANG, CH_ANY);
  41                 addColorParticles(ent->x, ent->y, Math::rrand(25, 75), -1);
  42         }
  43
  44         if ((ent == &player) && (engine.cheatInvulnerable))
  45         {
  46                 if (!ent->immune)
  47                 {
  48                         ent->health -= damage;
  49                 }
  50                 return;
  51         }
  52
  53         if (ent == &player)
  54         {
  55                 if (!ent->immune)
  56                 {
  57                         ent->health -= damage;
  58                 }
  59
  60                 ent->immune = 180;
  61
  62                 if (player.health <= 0)
  63                 {
  64                         audio.playSound(SND_DEATH1 + Math::prand() % 3, CH_DEATH);
  65                         player.health = 0;
  66                 }
  67
  68                 Math::removeBit(&player.flags, ENT_FLIES);
  69
  70                 player.setSprites(graphics.getSprite("BobRight", true), graphics.getSprite("BobLeft", true), graphics.getSprite("BobSpin", true));
  71         }
  72         else
  73         {
  74                 ent->health -= damage;
  75         }
  76
  77         ((Math::prand() % 2) == 0) ? ent->dx = -minDX : ent->dx = maxDX;
  78
  79         if (ent->dy >= 0)
  80         {
  81                 ent->dy = DY;
  82         }
  83         else
  84         {
  85                 ent->dy = -DY;
  86         }
  87 }
  88
  89 bool checkBrickContactX(Entity *ent)
  90 {
  91         int new_ent_x = (int)round((ent->x + ent->dx) * 100) / 100;
  92         int ent_y = (int)round(ent->y * 100) / 100;
  93         int x1 = new_ent_x >> BRICKSHIFT;
  94         int x2 = (new_ent_x + ent->width - 1) >> BRICKSHIFT;
  95         int y1 = ent_y >> BRICKSHIFT;
  96         int y2 = (ent_y + ent->height - 1) >> BRICKSHIFT;
  97
  98         if ((x1 < 0) || (x2 < 0) || (y1 < 0) || (y2 < 0))
  99         {
 100                 return true;
 101         }
 102
 103         int mapAttribute = map.data[x1][y2];
 104
 105         evaluateMapAttribute(ent, mapAttribute);
 106
 107         if ((ent->flags & ENT_SWIMS) && (mapAttribute == MAP_AIR))
 108                 return true;
 109
 110         if (ent->dx < 0)
 111         {
 112                 if ((map.isSolid(x1, y1)) || (map.isSolid(x1, y2)))
 113                 {
 114                         ent->x = (x1 + 1) * BRICKSIZE;
 115
 116 //                      if (map.isSolid(x1, y2))
 117 //                      {
 118 //                              ent->falling = false;
 119 //                      }
 120
 121                         return true;
 122                 }
 123         }
 124         else if (ent->dx > 0)
 125         {
 126                 if ((map.isSolid(x2, y1)) || (map.isSolid(x2, y2)))
 127                 {
 128                         ent->x = (x2 * BRICKSIZE) - ent->width;
 129
 130 //                      if (map.isSolid(x1, y2))
 131 //                      {
 132 //                              ent->falling = false;
 133 //                      }
 134
 135                         return true;
 136                 }
 137         }
 138
 139         return false;
 140 }
 141
 142 bool checkBrickContactY(Entity *ent)
 143 {
 144         int ent_x = (int)round(ent->x * 100) / 100;
 145         int new_ent_y = (int)round((ent->y + ent->dy) * 100) / 100;
 146         int x1 = ent_x >> BRICKSHIFT;
 147         int x2 = (ent_x + ent->width - 1) >> BRICKSHIFT;
 148         int y1 = new_ent_y >> BRICKSHIFT;
 149         int y2 = (new_ent_y + ent->height - 1) >> BRICKSHIFT;
 150
 151         if ((x1 < 0) || (x2 < 0) || (y1 < 0) || (y2 < 0))
 152         {
 153                 return true;
 154         }
 155
 156         int mapAttribute = map.data[x1][y2];
 157
 158         if (ent->dy < 0)
 159         {
 160                 mapAttribute = map.data[x1][y1];
 161         }
 162
 163         evaluateMapAttribute(ent, mapAttribute);
 164
 165         if (ent->flags & ENT_SWIMS)
 166         {
 167                 switch (mapAttribute)
 168                 {
 169                         case MAP_AIR:
 170                         case MAP_AIR_WALL_1:
 171                         case MAP_AIR_WALL_2:
 172                         case MAP_AIR_WALL_3:
 173                         case MAP_AIR_CEILING_1:
 174                                 return true;
 175                         case MAP_AIR_WALL_4:
 176                                 if (map.isCavesTileset)
 177                                 {
 178                                         return true;
 179                                 }
 180                                 break;
 181                         case MAP_AIR_CEILING_2:
 182                                 if (map.isGrasslandsTileset)
 183                                 {
 184                                         return true;
 185                                 }
 186                                 break;
 187                 }
 188         }
 189
 190         if (ent->dy < 0)
 191         {
 192                 if ((map.isSolid(x1, y1)) || (map.isSolid(x2, y1)))
 193                 {
 194                         ent->y = (y1 + 1) * BRICKSIZE;
 195                         ent->falling = false;
 196
 197                         return true;
 198                 }
 199         }
 200         else if (ent->dy > 0)
 201         {
 202                 ent->falling = true;
 203
 204                 if ((map.isSolid(x1, y2)) || (map.isSolid(x2, y2)))
 205                 {
 206                         ent->falling = false;
 207
 208                         ent->y = (y2 * BRICKSIZE) - ent->height;
 209
 210                         if ((map.isSolid(x1, y2)) && (!map.isBreakable(x1, y2)) && (!map.isNoReset(x1, y2)))
 211                         {
 212                                 if ((ent == &player) && (player.environment == ENV_AIR))
 213                                 {
 214                                         game.setCheckPoint(x1 * BRICKSIZE, (y2 * BRICKSIZE) - BRICKSIZE);
 215
 216                                         if (engine.practice)
 217                                         {
 218                                                 game.setObjectiveCheckPoint();
 219                                         }
 220                                 }
 221                         }
 222
 223                         if ((map.isSolid(x2, y2)) && (!map.isBreakable(x2, y2)) && (!map.isNoReset(x2, y2)))
 224                         {
 225                                 if ((ent == &player) && (player.environment == ENV_AIR))
 226                                 {
 227                                         game.setCheckPoint(x2 * BRICKSIZE, (y2 * BRICKSIZE) - BRICKSIZE);
 228                                         if (engine.practice)
 229                                         {
 230                                                 game.setObjectiveCheckPoint();
 231                                         }
 232                                 }
 233                         }
 234
 235                         return true;
 236                 }
 237         }
 238
 239         return false;
 240 }
 241
 242 void moveEntity(Entity *ent)
 243 {
 244         if (ent->owner->flags & ENT_TELEPORTING)
 245         {
 246                 int diffX = (abs((int)ent->x - (int)ent->dx) / 20);
 247                 int diffY = (abs((int)ent->y - (int)ent->dy) / 20);
 248
 249                 // add teleport particles so we can see where thing are going (no sound)
 250                 addTeleportParticles(ent->x + Math::prand() % ent->width, ent->y + Math::prand() % ent->height, 3, -1);
 251
 252                 Math::limitInt(&diffX, 3, 30);
 253                 Math::limitInt(&diffY, 3, 30);
 254
 255                 if (ent->x > ent->dx) ent->x -= diffX;
 256                 if (ent->x < ent->dx) ent->x += diffX;
 257                 if (ent->y > ent->dy) ent->y -= diffY;
 258                 if (ent->y < ent->dy) ent->y += diffY;
 259
 260                 if (Collision::collision(ent->x, ent->y, ent->width, ent->height, ent->dx, ent->dy, ent->width, ent->height))
 261                 {
 262                         Math::removeBit(&ent->flags, ENT_TELEPORTING);
 263                         addTeleportParticles(ent->x + (ent->width / 2), ent->y + (ent->height / 2), 25, SND_TELEPORT3);
 264                         ent->dx = ent->dy = 0;
 265                         ent->environment = ENV_AIR;
 266
 267                         if (ent == &player)
 268                         {
 269                                 if (player.flags & ENT_FLIES)
 270                                 {
 271                                         player.setSprites(graphics.getSprite("JPBobRight", true), graphics.getSprite("JPBobLeft", true), graphics.getSprite("BobSpin", true));
 272                                 }
 273                                 else
 274                                 {
 275                                         player.setSprites(graphics.getSprite("BobRight", true), graphics.getSprite("BobLeft", true), graphics.getSprite("BobSpin", true));
 276                                 }
 277                         }
 278
 279                         // raise to the floor
 280                         int x1 = (int)ent->x >> BRICKSHIFT;
 281                         int x2 = ((int)ent->x + ent->width - 1) >> BRICKSHIFT;
 282                         int y2 = ((int)ent->y + ent->height - 1) >> BRICKSHIFT;
 283                         if ((map.isSolid(x1, y2)) || (map.isSolid(x2, y2)))
 284                         {
 285                                 ent->y = (y2 * BRICKSIZE) - ent->height;
 286                         }
 287
 288                         debug(("%s reappeared at %f:%f\n", ent->name, ent->x, ent->y));
 289                 }
 290
 291                 return;
 292         }
 293
 294         if (ent->owner != ent)
 295         {
 296                 return;
 297         }
 298
 299         ent->falling = true;
 300
 301         if (ent != &player)
 302         {
 303                 if ((!(ent->flags & ENT_WEIGHTLESS)) && (!(ent->flags & ENT_FLIES)) && (!(ent->flags & ENT_SWIMS)))
 304                 {
 305                         ent->applyGravity();
 306                 }
 307         }
 308         else if (!(ent->flags & ENT_FLIES))
 309         {
 310                 if (ent->environment == ENV_AIR)
 311                 {
 312                         ent->applyGravity();
 313                 }
 314                 // This is what makes swimming work:
 315                 else if ((!config.isControl(CONTROL::UP)) && (!config.isControl(CONTROL::JUMP))  && (!config.isControl(CONTROL::DOWN)))
 316                 {
 317                         ent->applyGravity();
 318                 }
 319         }
 320
 321         if (ent->dx != 0)
 322         {
 323                 if ((checkBrickContactX(ent)) || (checkObstacleContact(ent, 0)) || (checkTrainContact(ent, 0)))
 324                 {
 325                         ent->dx = 0;
 326                 }
 327
 328                 ent->x += ent->dx;
 329
 330                 if (ent->flags & ENT_SLIDES)
 331                 {
 332                         ent->dx *= 0.98;
 333                 }
 334         }
 335
 336         if (ent->dy != 0)
 337         {
 338                 if ((checkBrickContactY(ent)) || (checkObstacleContact(ent, 1)) || (checkTrainContact(ent, 1)))
 339                 {
 340                         if ((ent->flags & ENT_BOUNCES) && (ent->dy >= 3))
 341                         {
 342                                 ent->dy = (0 - ent->dy / 2);
 343                         }
 344                         else
 345                         {
 346                                 ent->dy = 0;
 347                         }
 348                 }
 349
 350                 ent->y += ent->dy;
 351         }
 352
 353         checkSwitchContact(ent);
 354         checkTeleportContact(ent);
 355
 356 //      Math::limitFloat(&ent->x, 10, (MAPWIDTH * BRICKSIZE) - 20);
 357         if (ent->x < 10)
 358         {
 359                 ent->x = 10;
 360                 if (ent->dx < 0)
 361                 {
 362                         ent->dx = 0;
 363                 }
 364         }
 365         else if (ent->x > (MAPWIDTH * BRICKSIZE) - 20)
 366         {
 367                 ent->x = (MAPWIDTH * BRICKSIZE) - 20;
 368                 if (ent->dx > 0)
 369                 {
 370                         ent->dx = 0;
 371                 }
 372         }
 373 }