| 1 | /* |
| 2 | * Elite - The New Kind. |
| 3 | * |
| 4 | * Reverse engineered from the BBC disk version of Elite. |
| 5 | * Additional material by C.J.Pinder. |
| 6 | * |
| 7 | * The original Elite code is (C) I.Bell & D.Braben 1984. |
| 8 | * This version re-engineered in C by C.J.Pinder 1999-2001. |
| 9 | * |
| 10 | * email: <christian@newkind.co.uk> |
| 11 | * |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * swat.c |
| 17 | * |
| 18 | * Special Weapons And Tactics. |
| 19 | */ |
| 20 | |
| 21 | #include <math.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #include "config.h" |
| 26 | #include "gfx.h" |
| 27 | #include "elite.h" |
| 28 | #include "vector.h" |
| 29 | #include "swat.h" |
| 30 | #include "shipdata.h" |
| 31 | #include "space.h" |
| 32 | #include "main.h" |
| 33 | #include "sound.h" |
| 34 | #include "random.h" |
| 35 | #include "trade.h" |
| 36 | #include "pilot.h" |
| 37 | |
| 38 | int laser_counter; |
| 39 | int laser; |
| 40 | int laser2; |
| 41 | int laser_x; |
| 42 | int laser_y; |
| 43 | |
| 44 | int ecm_active; |
| 45 | int missile_target; |
| 46 | int ecm_ours; |
| 47 | int in_battle; |
| 48 | |
| 49 | struct univ_object universe[MAX_UNIV_OBJECTS]; |
| 50 | int ship_count[NO_OF_SHIPS + 1]; /* many */ |
| 51 | |
| 52 | |
| 53 | int initial_flags[NO_OF_SHIPS + 1] = |
| 54 | { |
| 55 | 0, // NULL, |
| 56 | FLG_TARGET, // missile |
| 57 | 0, // coriolis |
| 58 | FLG_SLOW | FLG_FLY_TO_PLANET, // escape |
| 59 | FLG_INACTIVE | FLG_TARGET, // alloy |
| 60 | FLG_INACTIVE | FLG_TARGET, // cargo |
| 61 | FLG_INACTIVE | FLG_TARGET, // boulder |
| 62 | FLG_INACTIVE | FLG_TARGET, // asteroid |
| 63 | FLG_INACTIVE | FLG_TARGET, // rock |
| 64 | FLG_FLY_TO_PLANET | FLG_SLOW, // shuttle |
| 65 | FLG_FLY_TO_PLANET | FLG_SLOW, // transporter |
| 66 | 0, // cobra3 |
| 67 | 0, // python |
| 68 | 0, // boa |
| 69 | FLG_SLOW, // anaconda |
| 70 | FLG_SLOW, // hermit |
| 71 | FLG_BOLD | FLG_POLICE, // viper |
| 72 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // sidewinder |
| 73 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // mamba |
| 74 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // krait |
| 75 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // adder |
| 76 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // gecko |
| 77 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // cobra1 |
| 78 | FLG_SLOW | FLG_ANGRY | FLG_TARGET, // worm |
| 79 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // cobra3 |
| 80 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // asp2 |
| 81 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // python |
| 82 | FLG_POLICE, // fer_de_lance |
| 83 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // moray |
| 84 | FLG_BOLD | FLG_ANGRY | FLG_TARGET, // thargoid |
| 85 | FLG_ANGRY | FLG_TARGET, // thargon |
| 86 | FLG_ANGRY, // constrictor |
| 87 | FLG_POLICE | FLG_CLOAKED, // cougar |
| 88 | 0 // dodec |
| 89 | }; |
| 90 | |
| 91 | |
| 92 | |
| 93 | |
| 94 | void clear_universe (void) |
| 95 | { |
| 96 | int i; |
| 97 | |
| 98 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 99 | universe[i].type = 0; |
| 100 | |
| 101 | for (i = 0; i <= NO_OF_SHIPS; i++) |
| 102 | ship_count[i] = 0; |
| 103 | |
| 104 | in_battle = 0; |
| 105 | } |
| 106 | |
| 107 | |
| 108 | int add_new_ship (int ship_type, int x, int y, int z, struct vector *rotmat, int rotx, int rotz) |
| 109 | { |
| 110 | int i; |
| 111 | |
| 112 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 113 | { |
| 114 | if (universe[i].type == 0) |
| 115 | { |
| 116 | universe[i].type = ship_type; |
| 117 | universe[i].location.x = x; |
| 118 | universe[i].location.y = y; |
| 119 | universe[i].location.z = z; |
| 120 | |
| 121 | universe[i].distance = sqrt(x*x + y*y + z*z); |
| 122 | |
| 123 | universe[i].rotmat[0] = rotmat[0]; |
| 124 | universe[i].rotmat[1] = rotmat[1]; |
| 125 | universe[i].rotmat[2] = rotmat[2]; |
| 126 | |
| 127 | universe[i].rotx = rotx; |
| 128 | universe[i].rotz = rotz; |
| 129 | |
| 130 | universe[i].velocity = 0; |
| 131 | universe[i].acceleration = 0; |
| 132 | universe[i].bravery = 0; |
| 133 | universe[i].target = 0; |
| 134 | |
| 135 | universe[i].flags = initial_flags[ship_type]; |
| 136 | |
| 137 | if ((ship_type != SHIP_PLANET) && (ship_type != SHIP_SUN)) |
| 138 | { |
| 139 | universe[i].energy = ship_list[ship_type]->energy; |
| 140 | universe[i].missiles = ship_list[ship_type]->missiles; |
| 141 | ship_count[ship_type]++; |
| 142 | } |
| 143 | |
| 144 | return i; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | return -1; |
| 149 | } |
| 150 | |
| 151 | |
| 152 | |
| 153 | |
| 154 | void check_missiles (int un) |
| 155 | { |
| 156 | int i; |
| 157 | |
| 158 | if (missile_target == un) |
| 159 | { |
| 160 | missile_target = MISSILE_UNARMED; |
| 161 | info_message ("Target Lost"); |
| 162 | } |
| 163 | |
| 164 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 165 | { |
| 166 | if ((universe[i].type == SHIP_MISSILE) && (universe[i].target == un)) |
| 167 | universe[i].flags |= FLG_DEAD; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | |
| 172 | void remove_ship (int un) |
| 173 | { |
| 174 | int type; |
| 175 | Matrix rotmat; |
| 176 | int px,py,pz; |
| 177 | |
| 178 | type = universe[un].type; |
| 179 | |
| 180 | if (type == 0) |
| 181 | return; |
| 182 | |
| 183 | if (type > 0) |
| 184 | ship_count[type]--; |
| 185 | |
| 186 | universe[un].type = 0; |
| 187 | |
| 188 | check_missiles (un); |
| 189 | |
| 190 | if ((type == SHIP_CORIOLIS) || (type == SHIP_DODEC)) |
| 191 | { |
| 192 | set_init_matrix (rotmat); |
| 193 | px = universe[un].location.x; |
| 194 | py = universe[un].location.y; |
| 195 | pz = universe[un].location.z; |
| 196 | |
| 197 | py &= 0xFFFF; |
| 198 | py |= 0x60000; |
| 199 | |
| 200 | add_new_ship (SHIP_SUN, px, py, pz, rotmat, 0, 0); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | |
| 205 | void add_new_station (double sx, double sy, double sz, Matrix rotmat) |
| 206 | { |
| 207 | int station; |
| 208 | |
| 209 | station = (current_planet_data.techlevel >= 10) ? SHIP_DODEC : SHIP_CORIOLIS; |
| 210 | universe[1].type = 0; |
| 211 | add_new_ship (station, sx, sy, sz, rotmat, 0, -127); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | |
| 216 | |
| 217 | void reset_weapons (void) |
| 218 | { |
| 219 | laser_temp = 0; |
| 220 | laser_counter = 0; |
| 221 | laser = 0; |
| 222 | ecm_active = 0; |
| 223 | missile_target = MISSILE_UNARMED; |
| 224 | } |
| 225 | |
| 226 | |
| 227 | void launch_enemy (int un, int type, int flags, int bravery) |
| 228 | { |
| 229 | int newship; |
| 230 | struct univ_object *ns; |
| 231 | |
| 232 | newship = add_new_ship (type, universe[un].location.x, universe[un].location.y, |
| 233 | universe[un].location.z, universe[un].rotmat, |
| 234 | universe[un].rotx, universe[un].rotz); |
| 235 | |
| 236 | if (newship == -1) |
| 237 | { |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | ns = &universe[newship]; |
| 242 | |
| 243 | if ((universe[un].type == SHIP_CORIOLIS) || (universe[un].type == SHIP_DODEC)) |
| 244 | { |
| 245 | ns->velocity = 32; |
| 246 | ns->location.x += ns->rotmat[2].x * 2; |
| 247 | ns->location.y += ns->rotmat[2].y * 2; |
| 248 | ns->location.z += ns->rotmat[2].z * 2; |
| 249 | } |
| 250 | |
| 251 | ns->flags |= flags; |
| 252 | ns->rotz /= 2; |
| 253 | ns->rotz *= 2; |
| 254 | ns->bravery = bravery; |
| 255 | |
| 256 | if ((type == SHIP_CARGO) || (type == SHIP_ALLOY) || (type == SHIP_ROCK)) |
| 257 | { |
| 258 | ns->rotz = ((rand255() * 2) & 255) - 128; |
| 259 | ns->rotx = ((rand255() * 2) & 255) - 128; |
| 260 | ns->velocity = rand255() & 15; |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | |
| 265 | void launch_loot (int un, int loot) |
| 266 | { |
| 267 | int i,cnt; |
| 268 | |
| 269 | if (loot == SHIP_ROCK) |
| 270 | { |
| 271 | cnt = rand255() & 3; |
| 272 | } |
| 273 | else |
| 274 | { |
| 275 | cnt = rand255(); |
| 276 | if (cnt >= 128) |
| 277 | return; |
| 278 | |
| 279 | cnt &= ship_list[universe[un].type]->max_loot; |
| 280 | cnt &= 15; |
| 281 | } |
| 282 | |
| 283 | for (i = 0; i < cnt; i++) |
| 284 | { |
| 285 | launch_enemy (un, loot, 0,0); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | |
| 290 | |
| 291 | |
| 292 | int in_target (int type, double x, double y, double z) |
| 293 | { |
| 294 | double size; |
| 295 | |
| 296 | if (z < 0) |
| 297 | return 0; |
| 298 | |
| 299 | size = ship_list[type]->size; |
| 300 | |
| 301 | return ((x*x + y*y) <= size); |
| 302 | } |
| 303 | |
| 304 | |
| 305 | |
| 306 | void make_angry (int un) |
| 307 | { |
| 308 | int type; |
| 309 | int flags; |
| 310 | |
| 311 | type = universe[un].type; |
| 312 | flags = universe[un].flags; |
| 313 | |
| 314 | if (flags & FLG_INACTIVE) { |
| 315 | universe[un].flags |= FLG_TACTICAL; |
| 316 | return; |
| 317 | } |
| 318 | |
| 319 | if ((type == SHIP_CORIOLIS) || (type == SHIP_DODEC)) |
| 320 | { |
| 321 | universe[un].flags |= FLG_ANGRY; |
| 322 | return; |
| 323 | } |
| 324 | |
| 325 | if (!(universe[un].flags & FLG_TARGET) && |
| 326 | (universe[1].type == SHIP_CORIOLIS || |
| 327 | universe[1].type == SHIP_DODEC)) |
| 328 | universe[1].flags |= FLG_ANGRY; |
| 329 | |
| 330 | if (type > SHIP_ROCK) |
| 331 | { |
| 332 | universe[un].rotx = 4; |
| 333 | universe[un].acceleration = 2; |
| 334 | universe[un].flags |= FLG_ANGRY | FLG_TACTICAL; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | |
| 339 | void explode_object (int un) |
| 340 | { |
| 341 | |
| 342 | cmdr.score++; |
| 343 | |
| 344 | if ((cmdr.score & 255) == 0) |
| 345 | info_message ("Right On Commander!"); |
| 346 | |
| 347 | snd_play_sample (SND_EXPLODE); |
| 348 | universe[un].flags |= FLG_DEAD; |
| 349 | |
| 350 | if (universe[un].type == SHIP_CONSTRICTOR) |
| 351 | cmdr.mission = 2; |
| 352 | } |
| 353 | |
| 354 | |
| 355 | void check_target (int un, struct univ_object *flip) |
| 356 | { |
| 357 | struct univ_object *univ; |
| 358 | |
| 359 | univ = &universe[un]; |
| 360 | |
| 361 | if (in_target (univ->type, flip->location.x, flip->location.y, flip->location.z)) |
| 362 | { |
| 363 | if ((missile_target == MISSILE_ARMED) && (univ->type >= 0)) |
| 364 | { |
| 365 | missile_target = un; |
| 366 | info_message ("Target Locked"); |
| 367 | snd_play_sample (SND_BEEP); |
| 368 | } |
| 369 | |
| 370 | if (laser) |
| 371 | { |
| 372 | snd_play_sample (SND_HIT_ENEMY); |
| 373 | |
| 374 | if ((univ->type != SHIP_CORIOLIS) && (univ->type != SHIP_DODEC)) |
| 375 | { |
| 376 | if ((univ->type == SHIP_CONSTRICTOR) || (univ->type == SHIP_COUGAR)) |
| 377 | { |
| 378 | if (laser == (MILITARY_LASER & 127)) |
| 379 | univ->energy -= laser / 4; |
| 380 | } |
| 381 | else |
| 382 | { |
| 383 | univ->energy -= laser; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if (univ->energy <= 0) |
| 388 | { |
| 389 | explode_object (un); |
| 390 | |
| 391 | if (univ->type == SHIP_ASTEROID) |
| 392 | { |
| 393 | if (laser == (MINING_LASER & 127)) |
| 394 | launch_loot (un, SHIP_ROCK); |
| 395 | } |
| 396 | else |
| 397 | { |
| 398 | launch_loot (un, SHIP_ALLOY); |
| 399 | launch_loot (un, SHIP_CARGO); |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | make_angry (un); |
| 404 | } |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | |
| 409 | |
| 410 | void activate_ecm (int ours) |
| 411 | { |
| 412 | if (ecm_active == 0) |
| 413 | { |
| 414 | ecm_active = 32; |
| 415 | ecm_ours = ours; |
| 416 | snd_play_sample (SND_ECM); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | |
| 421 | void time_ecm (void) |
| 422 | { |
| 423 | if (ecm_active != 0) |
| 424 | { |
| 425 | ecm_active--; |
| 426 | if (ecm_ours) |
| 427 | decrease_energy (-1); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | |
| 432 | void arm_missile (void) |
| 433 | { |
| 434 | if ((cmdr.missiles != 0) && (missile_target == MISSILE_UNARMED)) |
| 435 | missile_target = MISSILE_ARMED; |
| 436 | } |
| 437 | |
| 438 | |
| 439 | void unarm_missile (void) |
| 440 | { |
| 441 | missile_target = MISSILE_UNARMED; |
| 442 | snd_play_sample (SND_BOOP); |
| 443 | } |
| 444 | |
| 445 | void fire_missile (void) |
| 446 | { |
| 447 | int newship; |
| 448 | struct univ_object *ns; |
| 449 | Matrix rotmat; |
| 450 | |
| 451 | if (missile_target < 0) |
| 452 | return; |
| 453 | |
| 454 | set_init_matrix (rotmat); |
| 455 | rotmat[2].z = 1.0; |
| 456 | rotmat[0].x = -1.0; |
| 457 | |
| 458 | newship = add_new_ship (SHIP_MISSILE, 0, -28, 14, rotmat, 0, 0); |
| 459 | |
| 460 | if (newship == -1) |
| 461 | { |
| 462 | info_message ("Missile Jammed"); |
| 463 | return; |
| 464 | } |
| 465 | |
| 466 | ns = &universe[newship]; |
| 467 | |
| 468 | ns->velocity = flight_speed * 2; |
| 469 | ns->flags |= FLG_TACTICAL; |
| 470 | ns->target = missile_target; |
| 471 | |
| 472 | if (universe[missile_target].type > SHIP_ROCK) |
| 473 | universe[missile_target].flags |= FLG_ANGRY; |
| 474 | |
| 475 | cmdr.missiles--; |
| 476 | missile_target = MISSILE_UNARMED; |
| 477 | |
| 478 | snd_play_sample (SND_MISSILE); |
| 479 | } |
| 480 | |
| 481 | |
| 482 | |
| 483 | void track_object (struct univ_object *ship, double direction, Vector nvec) |
| 484 | { |
| 485 | double dir; |
| 486 | int rat; |
| 487 | double rat2; |
| 488 | |
| 489 | rat = 3; |
| 490 | rat2 = 0.111; |
| 491 | |
| 492 | dir = vector_dot_product (&nvec, &ship->rotmat[1]); |
| 493 | |
| 494 | if (direction < -0.861) |
| 495 | { |
| 496 | ship->rotx = (dir < 0) ? 7 : -7; |
| 497 | ship->rotz = 0; |
| 498 | return; |
| 499 | } |
| 500 | |
| 501 | ship->rotx = 0; |
| 502 | |
| 503 | if ((fabs(dir) * 2) >= rat2) |
| 504 | { |
| 505 | ship->rotx = (dir < 0) ? rat : -rat; |
| 506 | } |
| 507 | |
| 508 | if (abs(ship->rotz) < 16) |
| 509 | { |
| 510 | dir = vector_dot_product (&nvec, &ship->rotmat[0]); |
| 511 | |
| 512 | ship->rotz = 0; |
| 513 | |
| 514 | if ((fabs(dir) * 2) > rat2) |
| 515 | { |
| 516 | ship->rotz = (dir < 0) ? rat : -rat; |
| 517 | |
| 518 | if (ship->rotx < 0) |
| 519 | ship->rotz = -ship->rotz; |
| 520 | } |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | |
| 525 | |
| 526 | void missile_tactics (int un) |
| 527 | { |
| 528 | struct univ_object *missile; |
| 529 | struct univ_object *target; |
| 530 | Vector vec; |
| 531 | Vector nvec; |
| 532 | double direction; |
| 533 | double cnt2 = 0.223; |
| 534 | |
| 535 | missile = &universe[un]; |
| 536 | |
| 537 | if (ecm_active) |
| 538 | { |
| 539 | snd_play_sample (SND_EXPLODE); |
| 540 | missile->flags |= FLG_DEAD; |
| 541 | return; |
| 542 | } |
| 543 | |
| 544 | if (missile->target == 0) |
| 545 | { |
| 546 | if (missile->distance < 256) |
| 547 | { |
| 548 | missile->flags |= FLG_DEAD; |
| 549 | snd_play_sample (SND_EXPLODE); |
| 550 | damage_ship (250, missile->location.z >= 0.0); |
| 551 | return; |
| 552 | } |
| 553 | |
| 554 | vec.x = missile->location.x; |
| 555 | vec.y = missile->location.y; |
| 556 | vec.z = missile->location.z; |
| 557 | } |
| 558 | else |
| 559 | { |
| 560 | target = &universe[missile->target]; |
| 561 | |
| 562 | vec.x = missile->location.x - target->location.x; |
| 563 | vec.y = missile->location.y - target->location.y; |
| 564 | vec.z = missile->location.z - target->location.z; |
| 565 | |
| 566 | if ((fabs(vec.x) < 256) && (fabs(vec.y) < 256) && (fabs(vec.z) < 256)) |
| 567 | { |
| 568 | missile->flags |= FLG_DEAD; |
| 569 | |
| 570 | if ((target->type != SHIP_CORIOLIS) && (target->type != SHIP_DODEC)) |
| 571 | explode_object (missile->target); |
| 572 | else |
| 573 | snd_play_sample (SND_EXPLODE); |
| 574 | |
| 575 | return; |
| 576 | } |
| 577 | |
| 578 | if ((rand255() < 16) && (target->flags & FLG_HAS_ECM)) |
| 579 | { |
| 580 | activate_ecm (0); |
| 581 | return; |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | if ((rand255() < 16) && |
| 586 | (ship_count[SHIP_CORIOLIS] || ship_count[SHIP_DODEC])) { |
| 587 | activate_ecm(0); |
| 588 | return; |
| 589 | } |
| 590 | |
| 591 | nvec = unit_vector(&vec); |
| 592 | direction = vector_dot_product (&nvec, &missile->rotmat[2]); |
| 593 | nvec.x = -nvec.x; |
| 594 | nvec.y = -nvec.y; |
| 595 | nvec.z = -nvec.z; |
| 596 | direction = -direction; |
| 597 | |
| 598 | track_object (missile, direction, nvec); |
| 599 | |
| 600 | if (direction <= -0.167) |
| 601 | { |
| 602 | missile->acceleration = -2; |
| 603 | return; |
| 604 | } |
| 605 | |
| 606 | if (direction >= cnt2) |
| 607 | { |
| 608 | missile->acceleration = 3; |
| 609 | return; |
| 610 | } |
| 611 | |
| 612 | if (missile->velocity < 6) |
| 613 | missile->acceleration = 3; |
| 614 | else |
| 615 | if (rand255() >= 200) |
| 616 | missile->acceleration = -2; |
| 617 | return; |
| 618 | } |
| 619 | |
| 620 | |
| 621 | |
| 622 | void launch_shuttle (void) |
| 623 | { |
| 624 | int type; |
| 625 | |
| 626 | if ((ship_count[SHIP_TRANSPORTER] != 0) || |
| 627 | (ship_count[SHIP_SHUTTLE] != 0) || |
| 628 | (rand255() < 253) || (auto_pilot)) |
| 629 | return; |
| 630 | |
| 631 | type = rand255() & 1 ? SHIP_SHUTTLE : SHIP_TRANSPORTER; |
| 632 | launch_enemy (1, type, FLG_HAS_ECM | FLG_FLY_TO_PLANET, 113); |
| 633 | } |
| 634 | |
| 635 | |
| 636 | void tactics (int un) |
| 637 | { |
| 638 | int type; |
| 639 | int energy; |
| 640 | int maxeng; |
| 641 | int flags; |
| 642 | struct univ_object *ship; |
| 643 | Vector nvec; |
| 644 | double cnt2 = 0.223; |
| 645 | double direction; |
| 646 | int attacking; |
| 647 | |
| 648 | ship = &universe[un]; |
| 649 | type = ship->type; |
| 650 | flags = ship->flags; |
| 651 | |
| 652 | if ((type == SHIP_PLANET) || (type == SHIP_SUN)) |
| 653 | return; |
| 654 | |
| 655 | if (flags & FLG_DEAD) |
| 656 | return; |
| 657 | |
| 658 | if (flags & FLG_INACTIVE) |
| 659 | return; |
| 660 | |
| 661 | if (type == SHIP_MISSILE) |
| 662 | { |
| 663 | if (flags & FLG_ANGRY) |
| 664 | missile_tactics (un); |
| 665 | return; |
| 666 | } |
| 667 | |
| 668 | if (((un ^ mcount) & 7) != 0) |
| 669 | return; |
| 670 | |
| 671 | if ((type == SHIP_CORIOLIS) || (type == SHIP_DODEC)) |
| 672 | { |
| 673 | if (flags & FLG_ANGRY) |
| 674 | { |
| 675 | if ((rand() & 255) < 240) |
| 676 | return; |
| 677 | |
| 678 | if (ship_count[SHIP_VIPER] >= 4) |
| 679 | return; |
| 680 | |
| 681 | launch_enemy (un, SHIP_VIPER, FLG_ANGRY | FLG_HAS_ECM, 113); |
| 682 | return; |
| 683 | } |
| 684 | |
| 685 | launch_shuttle (); |
| 686 | return; |
| 687 | } |
| 688 | |
| 689 | if (type == SHIP_HERMIT) |
| 690 | { |
| 691 | if (rand255() > 200) |
| 692 | { |
| 693 | launch_enemy (un, SHIP_SIDEWINDER + (rand255() & 3), FLG_ANGRY | FLG_HAS_ECM, 113); |
| 694 | ship->flags |= FLG_INACTIVE | FLG_TARGET; |
| 695 | } |
| 696 | |
| 697 | return; |
| 698 | } |
| 699 | |
| 700 | |
| 701 | if (ship->energy < ship_list[type]->energy) |
| 702 | ship->energy++; |
| 703 | |
| 704 | if ((type == SHIP_THARGLET) && (ship_count[SHIP_THARGOID] == 0)) |
| 705 | { |
| 706 | ship->flags &= FLG_TARGET | FLG_TACTICAL; |
| 707 | ship->velocity /= 2; |
| 708 | return; |
| 709 | } |
| 710 | |
| 711 | if (flags & FLG_SLOW) |
| 712 | { |
| 713 | if (rand255() > 50) |
| 714 | return; |
| 715 | } |
| 716 | |
| 717 | if (flags & FLG_POLICE) |
| 718 | { |
| 719 | if (cmdr.legal_status >= 64) |
| 720 | { |
| 721 | flags |= FLG_ANGRY | FLG_TARGET; |
| 722 | ship->flags = flags; |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | if ((flags & FLG_ANGRY) == 0) |
| 727 | { |
| 728 | if ((flags & FLG_FLY_TO_PLANET) || (flags & FLG_FLY_TO_STATION)) |
| 729 | { |
| 730 | auto_pilot_ship (&universe[un]); |
| 731 | } |
| 732 | |
| 733 | return; |
| 734 | } |
| 735 | |
| 736 | |
| 737 | /* If we get to here then the ship is angry so start attacking... */ |
| 738 | |
| 739 | if (ship_count[SHIP_CORIOLIS] || ship_count[SHIP_DODEC]) |
| 740 | { |
| 741 | if ((flags & FLG_BOLD) == 0) |
| 742 | ship->bravery = 0; |
| 743 | } |
| 744 | |
| 745 | |
| 746 | if (type == SHIP_ANACONDA) |
| 747 | { |
| 748 | if (rand255() > 200) |
| 749 | { |
| 750 | launch_enemy (un, rand255() > 100 ? SHIP_WORM : SHIP_SIDEWINDER, |
| 751 | FLG_ANGRY | FLG_HAS_ECM, 113); |
| 752 | return; |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | |
| 757 | if (rand255() >= 250) |
| 758 | { |
| 759 | ship->rotz = rand255() | 0x68; |
| 760 | if (ship->rotz > 127) |
| 761 | ship->rotz = -(ship->rotz & 127); |
| 762 | } |
| 763 | |
| 764 | maxeng = ship_list[type]->energy; |
| 765 | energy = ship->energy; |
| 766 | |
| 767 | if (energy < (maxeng / 2)) |
| 768 | { |
| 769 | if ((energy < (maxeng / 8)) && (rand255() > 230) && (type != SHIP_THARGOID)) |
| 770 | { |
| 771 | ship->flags &= ~FLG_ANGRY; |
| 772 | ship->flags |= FLG_INACTIVE; |
| 773 | launch_enemy (un, SHIP_ESCAPE_CAPSULE, 0, 126); |
| 774 | return; |
| 775 | } |
| 776 | |
| 777 | if ((ship->missiles != 0) && (ecm_active == 0) && |
| 778 | (ship->missiles >= (rand255() & 31))) |
| 779 | { |
| 780 | ship->missiles--; |
| 781 | ship->flags |= FLG_TACTICAL; |
| 782 | if (type == SHIP_THARGOID) |
| 783 | launch_enemy (un, SHIP_THARGLET, FLG_ANGRY, ship->bravery); |
| 784 | else |
| 785 | { |
| 786 | launch_enemy (un, SHIP_MISSILE, FLG_ANGRY, 126); |
| 787 | ship->flags |= FLG_HOSTILE; |
| 788 | info_message ("INCOMING MISSILE"); |
| 789 | } |
| 790 | return; |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | nvec = unit_vector(&universe[un].location); |
| 795 | direction = vector_dot_product (&nvec, &ship->rotmat[2]); |
| 796 | |
| 797 | if ((ship->distance < 8192) && (direction <= -0.833) && |
| 798 | (ship_list[type]->laser_strength != 0)) |
| 799 | { |
| 800 | if (direction <= -0.917) |
| 801 | ship->flags |= FLG_FIRING | FLG_HOSTILE | FLG_TACTICAL; |
| 802 | |
| 803 | if (direction <= -0.972) |
| 804 | { |
| 805 | damage_ship (ship_list[type]->laser_strength, ship->location.z >= 0.0); |
| 806 | ship->acceleration--; |
| 807 | if (((ship->location.z >= 0.0) && (front_shield == 0)) || |
| 808 | ((ship->location.z < 0.0) && (aft_shield == 0))) |
| 809 | snd_play_sample (SND_INCOMMING_FIRE_2); |
| 810 | else |
| 811 | snd_play_sample (SND_INCOMMING_FIRE_1); |
| 812 | } |
| 813 | else |
| 814 | { |
| 815 | nvec.x = -nvec.x; |
| 816 | nvec.y = -nvec.y; |
| 817 | nvec.z = -nvec.z; |
| 818 | direction = -direction; |
| 819 | track_object (&universe[un], direction, nvec); |
| 820 | } |
| 821 | |
| 822 | // if ((fabs(ship->location.z) < 768) && (ship->bravery <= ((rand255() & 127) | 64))) |
| 823 | if (fabs(ship->location.z) < 768) |
| 824 | { |
| 825 | ship->rotx = rand255() & 0x87; |
| 826 | if (ship->rotx > 127) |
| 827 | ship->rotx = -(ship->rotx & 127); |
| 828 | |
| 829 | ship->acceleration = 3; |
| 830 | return; |
| 831 | } |
| 832 | |
| 833 | if (ship->distance < 8192) |
| 834 | ship->acceleration = -1; |
| 835 | else |
| 836 | ship->acceleration = 3; |
| 837 | return; |
| 838 | } |
| 839 | |
| 840 | attacking = 0; |
| 841 | |
| 842 | if ((fabs(ship->location.z) >= 768) || |
| 843 | (fabs(ship->location.x) >= 512) || |
| 844 | (fabs(ship->location.y) >= 512)) |
| 845 | { |
| 846 | if (ship->bravery > (rand255() & 127)) |
| 847 | { |
| 848 | attacking = 1; |
| 849 | nvec.x = -nvec.x; |
| 850 | nvec.y = -nvec.y; |
| 851 | nvec.z = -nvec.z; |
| 852 | direction = -direction; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | track_object (&universe[un], direction, nvec); |
| 857 | |
| 858 | if ((attacking == 1) && (ship->distance < 2048)) |
| 859 | { |
| 860 | if (direction >= cnt2) |
| 861 | { |
| 862 | ship->acceleration = -1; |
| 863 | return; |
| 864 | } |
| 865 | |
| 866 | if (ship->velocity < 6) |
| 867 | ship->acceleration = 3; |
| 868 | else |
| 869 | if (rand255() >= 200) |
| 870 | ship->acceleration = -1; |
| 871 | return; |
| 872 | } |
| 873 | |
| 874 | if (direction <= -0.167) |
| 875 | { |
| 876 | ship->acceleration = -1; |
| 877 | return; |
| 878 | } |
| 879 | |
| 880 | if (direction >= cnt2) |
| 881 | { |
| 882 | ship->acceleration = 3; |
| 883 | return; |
| 884 | } |
| 885 | |
| 886 | if (ship->velocity < 6) |
| 887 | ship->acceleration = 3; |
| 888 | else |
| 889 | if (rand255() >= 200) |
| 890 | ship->acceleration = -1; |
| 891 | } |
| 892 | |
| 893 | |
| 894 | void draw_laser_lines (void) |
| 895 | { |
| 896 | if (wireframe) |
| 897 | { |
| 898 | gfx_draw_colour_line (32 * GFX_SCALE, GFX_VIEW_BY, laser_x, laser_y, GFX_COL_WHITE); |
| 899 | gfx_draw_colour_line (48 * GFX_SCALE, GFX_VIEW_BY, laser_x, laser_y, GFX_COL_WHITE); |
| 900 | gfx_draw_colour_line (208 * GFX_SCALE, GFX_VIEW_BY, laser_x, laser_y, GFX_COL_WHITE); |
| 901 | gfx_draw_colour_line (224 * GFX_SCALE, GFX_VIEW_BY, laser_x, laser_y, GFX_COL_WHITE); |
| 902 | } |
| 903 | else |
| 904 | { |
| 905 | gfx_draw_triangle (32 * GFX_SCALE, GFX_VIEW_BY, laser_x, laser_y, 48 * GFX_SCALE, GFX_VIEW_BY, GFX_COL_RED); |
| 906 | gfx_draw_triangle (208 * GFX_SCALE, GFX_VIEW_BY, laser_x, laser_y, 224 * GFX_SCALE, GFX_VIEW_BY, GFX_COL_RED); |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | |
| 911 | int fire_laser (void) |
| 912 | { |
| 913 | if ((laser_counter == 0) && (laser_temp < 242)) |
| 914 | { |
| 915 | switch (current_screen) |
| 916 | { |
| 917 | case SCR_FRONT_VIEW: |
| 918 | laser = cmdr.front_laser; |
| 919 | break; |
| 920 | |
| 921 | case SCR_REAR_VIEW: |
| 922 | laser = cmdr.rear_laser; |
| 923 | break; |
| 924 | |
| 925 | case SCR_RIGHT_VIEW: |
| 926 | laser = cmdr.right_laser; |
| 927 | break; |
| 928 | |
| 929 | case SCR_LEFT_VIEW: |
| 930 | laser = cmdr.left_laser; |
| 931 | break; |
| 932 | |
| 933 | default: |
| 934 | laser = 0; |
| 935 | } |
| 936 | |
| 937 | if (laser != 0) |
| 938 | { |
| 939 | laser_counter = (laser > 127) ? 0 : (laser & 0xFA); |
| 940 | laser &= 127; |
| 941 | laser2 = laser; |
| 942 | |
| 943 | snd_play_sample (SND_PULSE); |
| 944 | laser_temp += 8; |
| 945 | if (energy > 1) |
| 946 | energy--; |
| 947 | |
| 948 | laser_x = ((rand() & 3) + 128 - 2) * GFX_SCALE; |
| 949 | laser_y = ((rand() & 3) + 96 - 2) * GFX_SCALE; |
| 950 | |
| 951 | return 2; |
| 952 | } |
| 953 | } |
| 954 | |
| 955 | return 0; |
| 956 | } |
| 957 | |
| 958 | |
| 959 | void cool_laser (void) |
| 960 | { |
| 961 | laser = 0; |
| 962 | |
| 963 | if (laser_temp > 0) |
| 964 | laser_temp--; |
| 965 | |
| 966 | if (laser_counter > 0) |
| 967 | laser_counter--; |
| 968 | |
| 969 | if (laser_counter > 0) |
| 970 | laser_counter--; |
| 971 | } |
| 972 | |
| 973 | |
| 974 | int create_other_ship (int type) |
| 975 | { |
| 976 | Matrix rotmat; |
| 977 | int x,y,z; |
| 978 | int newship; |
| 979 | |
| 980 | set_init_matrix (rotmat); |
| 981 | |
| 982 | z = 12000; |
| 983 | x = 1000 + (randint() & 8191); |
| 984 | y = 1000 + (randint() & 8191); |
| 985 | |
| 986 | if (rand255() > 127) |
| 987 | x = -x; |
| 988 | if (rand255() > 127) |
| 989 | y = -y; |
| 990 | |
| 991 | newship = add_new_ship (type, x, y, z, rotmat, 0, 0); |
| 992 | |
| 993 | return newship; |
| 994 | } |
| 995 | |
| 996 | |
| 997 | void create_thargoid (void) |
| 998 | { |
| 999 | int newship; |
| 1000 | |
| 1001 | newship = create_other_ship (SHIP_THARGOID); |
| 1002 | if (newship != -1) |
| 1003 | { |
| 1004 | universe[newship].flags = FLG_ANGRY | FLG_HAS_ECM | FLG_TARGET; |
| 1005 | universe[newship].bravery = 113; |
| 1006 | |
| 1007 | if (rand255() > 64) |
| 1008 | launch_enemy (newship, SHIP_THARGLET, FLG_ANGRY | FLG_HAS_ECM, |
| 1009 | 96); |
| 1010 | in_battle = 1; |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | |
| 1016 | void create_cougar (void) |
| 1017 | { |
| 1018 | int newship; |
| 1019 | |
| 1020 | if (ship_count[SHIP_COUGAR] != 0) |
| 1021 | return; |
| 1022 | |
| 1023 | newship = create_other_ship (SHIP_COUGAR); |
| 1024 | if (newship != -1) |
| 1025 | { |
| 1026 | universe[newship].flags = FLG_HAS_ECM; // | FLG_CLOAKED; |
| 1027 | universe[newship].bravery = 121; |
| 1028 | universe[newship].velocity = 18; |
| 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | |
| 1033 | |
| 1034 | void create_trader (void) |
| 1035 | { |
| 1036 | int newship; |
| 1037 | int rnd; |
| 1038 | int type; |
| 1039 | |
| 1040 | type = SHIP_COBRA3 + (rand255() & 3); |
| 1041 | |
| 1042 | newship = create_other_ship (type); |
| 1043 | |
| 1044 | if (newship != -1) |
| 1045 | { |
| 1046 | universe[newship].rotmat[2].z = -1.0; |
| 1047 | universe[newship].rotz = rand255() & 7; |
| 1048 | |
| 1049 | rnd = rand255(); |
| 1050 | universe[newship].velocity = (rnd & 31) | 16; |
| 1051 | universe[newship].bravery = rnd / 2; |
| 1052 | |
| 1053 | if (rnd & 1) |
| 1054 | universe[newship].flags |= FLG_HAS_ECM; |
| 1055 | |
| 1056 | if (rnd > (type == SHIP_ANACONDA ? 250 : 220)) |
| 1057 | universe[newship].flags |= FLG_ANGRY | FLG_TARGET; |
| 1058 | } |
| 1059 | } |
| 1060 | |
| 1061 | |
| 1062 | void create_lone_hunter (void) |
| 1063 | { |
| 1064 | int rnd; |
| 1065 | int type; |
| 1066 | int newship; |
| 1067 | |
| 1068 | if ((cmdr.mission == 1) && (cmdr.galaxy_number == 1) && |
| 1069 | (docked_planet.d == 144) && (docked_planet.b == 33) && |
| 1070 | (ship_count[SHIP_CONSTRICTOR] == 0)) |
| 1071 | { |
| 1072 | type = SHIP_CONSTRICTOR; |
| 1073 | } |
| 1074 | else |
| 1075 | { |
| 1076 | rnd = rand255(); |
| 1077 | type = SHIP_COBRA3_LONE + (rnd & 3) + (rnd > 127); |
| 1078 | } |
| 1079 | |
| 1080 | newship = create_other_ship (type); |
| 1081 | |
| 1082 | if (newship != -1) |
| 1083 | { |
| 1084 | // universe[newship].flags = FLG_ANGRY; |
| 1085 | if ((rand255() > 200) || (type == SHIP_CONSTRICTOR)) |
| 1086 | universe[newship].flags |= FLG_HAS_ECM; |
| 1087 | |
| 1088 | universe[newship].bravery = ((rand255() * 2) | 64) & 127; |
| 1089 | if (type == SHIP_FER_DE_LANCE) { |
| 1090 | if (rand255() > 160) |
| 1091 | universe[newship].flags |= FLG_ANGRY | FLG_TARGET; |
| 1092 | else { |
| 1093 | universe[newship].rotmat[2].z = -1.0; |
| 1094 | universe[newship].rotz = rand255() & 7; |
| 1095 | rnd = rand255(); |
| 1096 | universe[newship].velocity = (rnd & 31) | 16; |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | if (universe[newship].flags & FLG_ANGRY) |
| 1101 | in_battle = 1; |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | |
| 1106 | |
| 1107 | /* Check for a random asteroid encounter... */ |
| 1108 | |
| 1109 | void check_for_asteroids (void) |
| 1110 | { |
| 1111 | int newship; |
| 1112 | int type; |
| 1113 | |
| 1114 | if ((rand255() >= 35) || (ship_count[SHIP_ASTEROID] >= 3)) |
| 1115 | return; |
| 1116 | |
| 1117 | if (rand255() > 253) |
| 1118 | type = SHIP_HERMIT; |
| 1119 | else |
| 1120 | type = SHIP_ASTEROID; |
| 1121 | |
| 1122 | newship = create_other_ship (type); |
| 1123 | |
| 1124 | if (newship != -1) |
| 1125 | { |
| 1126 | // universe[newship].velocity = (rand255() & 31) | 16; |
| 1127 | universe[newship].velocity = 8; |
| 1128 | universe[newship].rotz = rand255() > 127 ? -127 : 127; |
| 1129 | universe[newship].rotx = 16; |
| 1130 | } |
| 1131 | } |
| 1132 | |
| 1133 | |
| 1134 | |
| 1135 | /* If we've been a bad boy then send the cops after us... */ |
| 1136 | |
| 1137 | void check_for_cops (void) |
| 1138 | { |
| 1139 | int newship; |
| 1140 | int offense; |
| 1141 | |
| 1142 | offense = carrying_contraband() * 2; |
| 1143 | if (ship_count[SHIP_VIPER] == 0) |
| 1144 | offense |= cmdr.legal_status; |
| 1145 | |
| 1146 | if (rand255() >= offense) |
| 1147 | return; |
| 1148 | |
| 1149 | newship = create_other_ship (SHIP_VIPER); |
| 1150 | |
| 1151 | if (newship != -1) |
| 1152 | { |
| 1153 | universe[newship].flags |= FLG_ANGRY | FLG_TARGET; |
| 1154 | if (rand255() > 245) |
| 1155 | universe[newship].flags |= FLG_HAS_ECM; |
| 1156 | |
| 1157 | universe[newship].bravery = ((rand255() * 2) | 64) & 127; |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | |
| 1162 | void check_for_others (void) |
| 1163 | { |
| 1164 | int x,y,z; |
| 1165 | int newship; |
| 1166 | Matrix rotmat; |
| 1167 | int gov; |
| 1168 | int rnd; |
| 1169 | int type; |
| 1170 | int i; |
| 1171 | |
| 1172 | gov = current_planet_data.government; |
| 1173 | rnd = rand255(); |
| 1174 | |
| 1175 | if ((gov != 0) && ((rnd >= 90) || ((rnd & 7) < gov))) |
| 1176 | return; |
| 1177 | |
| 1178 | if (rand255() < 100) |
| 1179 | { |
| 1180 | create_lone_hunter(); |
| 1181 | return; |
| 1182 | } |
| 1183 | |
| 1184 | /* Pack hunters... */ |
| 1185 | |
| 1186 | set_init_matrix (rotmat); |
| 1187 | |
| 1188 | z = 12000; |
| 1189 | x = 1000 + (randint() & 8191); |
| 1190 | y = 1000 + (randint() & 8191); |
| 1191 | |
| 1192 | if (rand255() > 127) |
| 1193 | x = -x; |
| 1194 | if (rand255() > 127) |
| 1195 | y = -y; |
| 1196 | |
| 1197 | rnd = rand255() & 3; |
| 1198 | |
| 1199 | for (i = 0; i <= rnd; i++) |
| 1200 | { |
| 1201 | type = SHIP_SIDEWINDER + (rand255() & rand255() & 7); |
| 1202 | newship = add_new_ship (type, x, y, z, rotmat, 0, 0); |
| 1203 | if (newship != -1) |
| 1204 | { |
| 1205 | universe[newship].flags |= FLG_ANGRY | FLG_TARGET; |
| 1206 | if (rand255() > 245) |
| 1207 | universe[newship].flags |= FLG_HAS_ECM; |
| 1208 | |
| 1209 | universe[newship].bravery = ((rand255() * 2) | 64) & 127; |
| 1210 | in_battle++; |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | } |
| 1215 | |
| 1216 | |
| 1217 | void random_encounter (void) |
| 1218 | { |
| 1219 | if ((ship_count[SHIP_CORIOLIS] != 0) || (ship_count[SHIP_DODEC] != 0)) |
| 1220 | return; |
| 1221 | |
| 1222 | if (rand255() == 136) |
| 1223 | { |
| 1224 | if (((int)(universe[0].location.z) & 0x3e) != 0) |
| 1225 | create_thargoid (); |
| 1226 | else |
| 1227 | create_cougar(); |
| 1228 | |
| 1229 | return; |
| 1230 | } |
| 1231 | |
| 1232 | if ((rand255() & 7) == 0) |
| 1233 | { |
| 1234 | create_trader(); |
| 1235 | return; |
| 1236 | } |
| 1237 | |
| 1238 | check_for_asteroids(); |
| 1239 | |
| 1240 | check_for_cops(); |
| 1241 | |
| 1242 | if (ship_count[SHIP_VIPER] != 0) |
| 1243 | return; |
| 1244 | |
| 1245 | if (in_battle) |
| 1246 | return; |
| 1247 | |
| 1248 | if ((cmdr.mission == 5) && (rand255() >= 200)) |
| 1249 | create_thargoid (); |
| 1250 | |
| 1251 | check_for_others(); |
| 1252 | } |
| 1253 | |
| 1254 | |
| 1255 | void abandon_ship (void) |
| 1256 | { |
| 1257 | int i; |
| 1258 | |
| 1259 | cmdr.escape_pod = 0; |
| 1260 | cmdr.legal_status = 0; |
| 1261 | cmdr.fuel = myship.max_fuel; |
| 1262 | |
| 1263 | for (i = 0; i < NO_OF_STOCK_ITEMS; i++) |
| 1264 | cmdr.current_cargo[i] = 0; |
| 1265 | |
| 1266 | snd_play_sample (SND_DOCK); |
| 1267 | dock_player(); |
| 1268 | current_screen = SCR_BREAK_PATTERN; |
| 1269 | } |
| 1270 | |