| 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 | * space.c |
| 17 | * |
| 18 | * This module handles all the flight system and management of the space universe. |
| 19 | */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <string.h> |
| 23 | #include <math.h> |
| 24 | #include <stdlib.h> |
| 25 | |
| 26 | #include "vector.h" |
| 27 | |
| 28 | #include "alg_data.h" |
| 29 | |
| 30 | #include "config.h" |
| 31 | #include "elite.h" |
| 32 | #include "gfx.h" |
| 33 | #include "docked.h" |
| 34 | #include "intro.h" |
| 35 | #include "shipdata.h" |
| 36 | #include "shipface.h" |
| 37 | #include "space.h" |
| 38 | #include "threed.h" |
| 39 | #include "sound.h" |
| 40 | #include "main.h" |
| 41 | #include "swat.h" |
| 42 | #include "random.h" |
| 43 | #include "trade.h" |
| 44 | #include "stars.h" |
| 45 | #include "pilot.h" |
| 46 | |
| 47 | extern int flight_climb; |
| 48 | extern int flight_roll; |
| 49 | extern int flight_speed; |
| 50 | |
| 51 | struct galaxy_seed destination_planet; |
| 52 | int hyper_ready; |
| 53 | int hyper_countdown; |
| 54 | char hyper_name[16]; |
| 55 | int hyper_distance; |
| 56 | int hyper_galactic; |
| 57 | |
| 58 | |
| 59 | |
| 60 | |
| 61 | |
| 62 | |
| 63 | void rotate_x_first (double *a, double *b, int direction) |
| 64 | { |
| 65 | double fx,ux; |
| 66 | |
| 67 | fx = *a; |
| 68 | ux = *b; |
| 69 | |
| 70 | if (direction < 0) |
| 71 | { |
| 72 | *a = fx - (fx / 512) + (ux / 19); |
| 73 | *b = ux - (ux / 512) - (fx / 19); |
| 74 | } |
| 75 | else |
| 76 | { |
| 77 | *a = fx - (fx / 512) - (ux / 19); |
| 78 | *b = ux - (ux / 512) + (fx / 19); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | |
| 83 | void rotate_vec (struct vector *vec, double alpha, double beta) |
| 84 | { |
| 85 | double x,y,z; |
| 86 | |
| 87 | x = vec->x; |
| 88 | y = vec->y; |
| 89 | z = vec->z; |
| 90 | |
| 91 | y = y - alpha * x; |
| 92 | x = x + alpha * y; |
| 93 | y = y - beta * z; |
| 94 | z = z + beta * y; |
| 95 | |
| 96 | vec->x = x; |
| 97 | vec->y = y; |
| 98 | vec->z = z; |
| 99 | } |
| 100 | |
| 101 | |
| 102 | /* |
| 103 | * Update an objects location in the universe. |
| 104 | */ |
| 105 | |
| 106 | void move_univ_object (struct univ_object *obj) |
| 107 | { |
| 108 | double x,y,z; |
| 109 | double k2; |
| 110 | double alpha; |
| 111 | double beta; |
| 112 | int rotx,rotz; |
| 113 | double speed; |
| 114 | |
| 115 | alpha = flight_roll / 256.0; |
| 116 | beta = flight_climb / 256.0; |
| 117 | |
| 118 | x = obj->location.x; |
| 119 | y = obj->location.y; |
| 120 | z = obj->location.z; |
| 121 | |
| 122 | if (!(obj->flags & FLG_DEAD)) |
| 123 | { |
| 124 | if (obj->velocity != 0) |
| 125 | { |
| 126 | speed = obj->velocity; |
| 127 | speed *= 1.5; |
| 128 | x += obj->rotmat[2].x * speed; |
| 129 | y += obj->rotmat[2].y * speed; |
| 130 | z += obj->rotmat[2].z * speed; |
| 131 | } |
| 132 | |
| 133 | if (obj->acceleration != 0) |
| 134 | { |
| 135 | obj->velocity += obj->acceleration; |
| 136 | obj->acceleration = 0; |
| 137 | if (obj->velocity > ship_list[obj->type]->velocity) |
| 138 | obj->velocity = ship_list[obj->type]->velocity; |
| 139 | |
| 140 | if (obj->velocity <= 0) |
| 141 | obj->velocity = 1; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | k2 = y - alpha * x; |
| 146 | z = z + beta * k2; |
| 147 | y = k2 - z * beta; |
| 148 | x = x + alpha * y; |
| 149 | |
| 150 | z = z - flight_speed; |
| 151 | |
| 152 | obj->location.x = x; |
| 153 | obj->location.y = y; |
| 154 | obj->location.z = z; |
| 155 | |
| 156 | obj->distance = sqrt (x*x + y*y + z*z); |
| 157 | |
| 158 | if (obj->type == SHIP_PLANET) |
| 159 | beta = 0.0; |
| 160 | |
| 161 | rotate_vec (&obj->rotmat[2], alpha, beta); |
| 162 | rotate_vec (&obj->rotmat[1], alpha, beta); |
| 163 | rotate_vec (&obj->rotmat[0], alpha, beta); |
| 164 | |
| 165 | if (obj->flags & FLG_DEAD) |
| 166 | return; |
| 167 | |
| 168 | |
| 169 | rotx = obj->rotx; |
| 170 | rotz = obj->rotz; |
| 171 | |
| 172 | /* If necessary rotate the object around the X axis... */ |
| 173 | |
| 174 | if (rotx != 0) |
| 175 | { |
| 176 | rotate_x_first (&obj->rotmat[2].x, &obj->rotmat[1].x, rotx); |
| 177 | rotate_x_first (&obj->rotmat[2].y, &obj->rotmat[1].y, rotx); |
| 178 | rotate_x_first (&obj->rotmat[2].z, &obj->rotmat[1].z, rotx); |
| 179 | |
| 180 | if ((rotx != 127) && (rotx != -127)) |
| 181 | obj->rotx -= (rotx < 0) ? -1 : 1; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | /* If necessary rotate the object around the Z axis... */ |
| 186 | |
| 187 | if (rotz != 0) |
| 188 | { |
| 189 | rotate_x_first (&obj->rotmat[0].x, &obj->rotmat[1].x, rotz); |
| 190 | rotate_x_first (&obj->rotmat[0].y, &obj->rotmat[1].y, rotz); |
| 191 | rotate_x_first (&obj->rotmat[0].z, &obj->rotmat[1].z, rotz); |
| 192 | |
| 193 | if ((rotz != 127) && (rotz != -127)) |
| 194 | obj->rotz -= (rotz < 0) ? -1 : 1; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | /* Orthonormalize the rotation matrix... */ |
| 199 | |
| 200 | tidy_matrix (obj->rotmat); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | /* |
| 205 | * Dock the player into the space station. |
| 206 | */ |
| 207 | |
| 208 | void dock_player (void) |
| 209 | { |
| 210 | disengage_auto_pilot(); |
| 211 | docked = 1; |
| 212 | flight_speed = 0; |
| 213 | flight_roll = 0; |
| 214 | flight_climb = 0; |
| 215 | front_shield = 255; |
| 216 | aft_shield = 255; |
| 217 | energy = 255; |
| 218 | myship.altitude = 255; |
| 219 | myship.cabtemp = 30; |
| 220 | reset_weapons(); |
| 221 | } |
| 222 | |
| 223 | |
| 224 | /* |
| 225 | * Check if we are correctly aligned to dock. |
| 226 | */ |
| 227 | |
| 228 | int is_docking (int sn) |
| 229 | { |
| 230 | struct vector vec; |
| 231 | double fz; |
| 232 | double ux; |
| 233 | |
| 234 | if (auto_pilot) // Don't want it to kill anyone! |
| 235 | return 1; |
| 236 | |
| 237 | fz = universe[sn].rotmat[2].z; |
| 238 | |
| 239 | if (fz > -0.90) |
| 240 | return 0; |
| 241 | |
| 242 | vec = unit_vector (&universe[sn].location); |
| 243 | |
| 244 | if (vec.z < 0.927) |
| 245 | return 0; |
| 246 | |
| 247 | ux = universe[sn].rotmat[1].x; |
| 248 | if (ux < 0) |
| 249 | ux = -ux; |
| 250 | |
| 251 | if (ux < 0.84) |
| 252 | return 0; |
| 253 | |
| 254 | return 1; |
| 255 | } |
| 256 | |
| 257 | |
| 258 | /* |
| 259 | * Game Over... |
| 260 | */ |
| 261 | |
| 262 | void do_game_over (void) |
| 263 | { |
| 264 | snd_play_sample (SND_GAMEOVER); |
| 265 | game_over = 1; |
| 266 | } |
| 267 | |
| 268 | |
| 269 | void update_altitude (void) |
| 270 | { |
| 271 | double x,y,z; |
| 272 | double dist; |
| 273 | |
| 274 | myship.altitude = 255; |
| 275 | |
| 276 | if (witchspace) |
| 277 | return; |
| 278 | |
| 279 | x = fabs(universe[0].location.x); |
| 280 | y = fabs(universe[0].location.y); |
| 281 | z = fabs(universe[0].location.z); |
| 282 | |
| 283 | if ((x > 65535) || (y > 65535) || (z > 65535)) |
| 284 | return; |
| 285 | |
| 286 | x /= 256; |
| 287 | y /= 256; |
| 288 | z /= 256; |
| 289 | |
| 290 | dist = (x * x) + (y * y) + (z * z); |
| 291 | |
| 292 | if (dist > 65535) |
| 293 | return; |
| 294 | |
| 295 | dist -= 9472; |
| 296 | if (dist < 1) |
| 297 | { |
| 298 | myship.altitude = 0; |
| 299 | do_game_over (); |
| 300 | return; |
| 301 | } |
| 302 | |
| 303 | dist = sqrt (dist); |
| 304 | if (dist < 1) |
| 305 | { |
| 306 | myship.altitude = 0; |
| 307 | do_game_over (); |
| 308 | return; |
| 309 | } |
| 310 | |
| 311 | myship.altitude = dist; |
| 312 | } |
| 313 | |
| 314 | |
| 315 | void update_cabin_temp (void) |
| 316 | { |
| 317 | int x,y,z; |
| 318 | int dist; |
| 319 | |
| 320 | myship.cabtemp = 30; |
| 321 | |
| 322 | if (witchspace) |
| 323 | return; |
| 324 | |
| 325 | if (ship_count[SHIP_CORIOLIS] || ship_count[SHIP_DODEC]) |
| 326 | return; |
| 327 | |
| 328 | x = abs((int)universe[1].location.x); |
| 329 | y = abs((int)universe[1].location.y); |
| 330 | z = abs((int)universe[1].location.z); |
| 331 | |
| 332 | if ((x > 65535) || (y > 65535) || (z > 65535)) |
| 333 | return; |
| 334 | |
| 335 | x /= 256; |
| 336 | y /= 256; |
| 337 | z /= 256; |
| 338 | |
| 339 | dist = ((x * x) + (y * y) + (z * z)) / 256; |
| 340 | |
| 341 | if (dist > 255) |
| 342 | return; |
| 343 | |
| 344 | dist ^= 255; |
| 345 | |
| 346 | myship.cabtemp = dist + 30; |
| 347 | |
| 348 | if (myship.cabtemp > 255) |
| 349 | { |
| 350 | myship.cabtemp = 255; |
| 351 | do_game_over (); |
| 352 | return; |
| 353 | } |
| 354 | |
| 355 | if ((myship.cabtemp < 224) || (cmdr.fuel_scoop == 0)) |
| 356 | return; |
| 357 | |
| 358 | cmdr.fuel += flight_speed / 2; |
| 359 | if (cmdr.fuel > myship.max_fuel) |
| 360 | cmdr.fuel = myship.max_fuel; |
| 361 | |
| 362 | info_message ("Fuel Scoop On"); |
| 363 | } |
| 364 | |
| 365 | |
| 366 | |
| 367 | /* |
| 368 | * Regenerate the shields and the energy banks. |
| 369 | */ |
| 370 | |
| 371 | void regenerate_shields (void) |
| 372 | { |
| 373 | if (energy > 127) |
| 374 | { |
| 375 | if (front_shield < 255) |
| 376 | { |
| 377 | front_shield++; |
| 378 | energy--; |
| 379 | } |
| 380 | |
| 381 | if (aft_shield < 255) |
| 382 | { |
| 383 | aft_shield++; |
| 384 | energy--; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | energy++; |
| 389 | energy += cmdr.energy_unit; |
| 390 | if (energy > 255) |
| 391 | energy = 255; |
| 392 | } |
| 393 | |
| 394 | |
| 395 | void decrease_energy (int amount) |
| 396 | { |
| 397 | energy += amount; |
| 398 | |
| 399 | if (energy <= 0) |
| 400 | do_game_over(); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | /* |
| 405 | * Deplete the shields. Drain the energy banks if the shields fail. |
| 406 | */ |
| 407 | |
| 408 | void damage_ship (int damage, int front) |
| 409 | { |
| 410 | int shield; |
| 411 | |
| 412 | if (damage <= 0) /* sanity check */ |
| 413 | return; |
| 414 | |
| 415 | shield = front ? front_shield : aft_shield; |
| 416 | |
| 417 | shield -= damage; |
| 418 | if (shield < 0) |
| 419 | { |
| 420 | decrease_energy (shield); |
| 421 | shield = 0; |
| 422 | } |
| 423 | |
| 424 | if (front) |
| 425 | front_shield = shield; |
| 426 | else |
| 427 | aft_shield = shield; |
| 428 | } |
| 429 | |
| 430 | |
| 431 | |
| 432 | |
| 433 | void make_station_appear (void) |
| 434 | { |
| 435 | double px,py,pz; |
| 436 | double sx,sy,sz; |
| 437 | Vector vec; |
| 438 | Matrix rotmat; |
| 439 | |
| 440 | px = universe[0].location.x; |
| 441 | py = universe[0].location.y; |
| 442 | pz = universe[0].location.z; |
| 443 | |
| 444 | vec.x = (rand() & 32767) - 16384; |
| 445 | vec.y = (rand() & 32767) - 16384; |
| 446 | vec.z = rand() & 32767; |
| 447 | |
| 448 | vec = unit_vector (&vec); |
| 449 | |
| 450 | sx = px - vec.x * 65792; |
| 451 | sy = py - vec.y * 65792; |
| 452 | sz = pz - vec.z * 65792; |
| 453 | |
| 454 | // set_init_matrix (rotmat); |
| 455 | |
| 456 | rotmat[0].x = 1.0; |
| 457 | rotmat[0].y = 0.0; |
| 458 | rotmat[0].z = 0.0; |
| 459 | |
| 460 | rotmat[1].x = vec.x; |
| 461 | rotmat[1].y = vec.z; |
| 462 | rotmat[1].z = -vec.y; |
| 463 | |
| 464 | rotmat[2].x = vec.x; |
| 465 | rotmat[2].y = vec.y; |
| 466 | rotmat[2].z = vec.z; |
| 467 | |
| 468 | tidy_matrix (rotmat); |
| 469 | |
| 470 | add_new_station (sx, sy, sz, rotmat); |
| 471 | } |
| 472 | |
| 473 | |
| 474 | |
| 475 | void check_docking (int i) |
| 476 | { |
| 477 | if (is_docking(i)) |
| 478 | { |
| 479 | snd_play_sample (SND_DOCK); |
| 480 | dock_player(); |
| 481 | current_screen = SCR_BREAK_PATTERN; |
| 482 | return; |
| 483 | } |
| 484 | |
| 485 | if (flight_speed >= 5) |
| 486 | { |
| 487 | do_game_over(); |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | flight_speed = 1; |
| 492 | damage_ship (5, universe[i].location.z > 0); |
| 493 | snd_play_sample (SND_CRASH); |
| 494 | } |
| 495 | |
| 496 | |
| 497 | void switch_to_view (struct univ_object *flip) |
| 498 | { |
| 499 | double tmp; |
| 500 | |
| 501 | if ((current_screen == SCR_REAR_VIEW) || |
| 502 | (current_screen == SCR_GAME_OVER)) |
| 503 | { |
| 504 | flip->location.x = -flip->location.x; |
| 505 | flip->location.z = -flip->location.z; |
| 506 | |
| 507 | flip->rotmat[0].x = -flip->rotmat[0].x; |
| 508 | flip->rotmat[0].z = -flip->rotmat[0].z; |
| 509 | |
| 510 | flip->rotmat[1].x = -flip->rotmat[1].x; |
| 511 | flip->rotmat[1].z = -flip->rotmat[1].z; |
| 512 | |
| 513 | flip->rotmat[2].x = -flip->rotmat[2].x; |
| 514 | flip->rotmat[2].z = -flip->rotmat[2].z; |
| 515 | return; |
| 516 | } |
| 517 | |
| 518 | |
| 519 | if (current_screen == SCR_LEFT_VIEW) |
| 520 | { |
| 521 | tmp = flip->location.x; |
| 522 | flip->location.x = flip->location.z; |
| 523 | flip->location.z = -tmp; |
| 524 | |
| 525 | if (flip->type < 0) |
| 526 | return; |
| 527 | |
| 528 | tmp = flip->rotmat[0].x; |
| 529 | flip->rotmat[0].x = flip->rotmat[0].z; |
| 530 | flip->rotmat[0].z = -tmp; |
| 531 | |
| 532 | tmp = flip->rotmat[1].x; |
| 533 | flip->rotmat[1].x = flip->rotmat[1].z; |
| 534 | flip->rotmat[1].z = -tmp; |
| 535 | |
| 536 | tmp = flip->rotmat[2].x; |
| 537 | flip->rotmat[2].x = flip->rotmat[2].z; |
| 538 | flip->rotmat[2].z = -tmp; |
| 539 | return; |
| 540 | } |
| 541 | |
| 542 | if (current_screen == SCR_RIGHT_VIEW) |
| 543 | { |
| 544 | tmp = flip->location.x; |
| 545 | flip->location.x = -flip->location.z; |
| 546 | flip->location.z = tmp; |
| 547 | |
| 548 | if (flip->type < 0) |
| 549 | return; |
| 550 | |
| 551 | tmp = flip->rotmat[0].x; |
| 552 | flip->rotmat[0].x = -flip->rotmat[0].z; |
| 553 | flip->rotmat[0].z = tmp; |
| 554 | |
| 555 | tmp = flip->rotmat[1].x; |
| 556 | flip->rotmat[1].x = -flip->rotmat[1].z; |
| 557 | flip->rotmat[1].z = tmp; |
| 558 | |
| 559 | tmp = flip->rotmat[2].x; |
| 560 | flip->rotmat[2].x = -flip->rotmat[2].z; |
| 561 | flip->rotmat[2].z = tmp; |
| 562 | |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | |
| 567 | /* |
| 568 | * Update all the objects in the universe and render them. |
| 569 | */ |
| 570 | |
| 571 | void update_universe (void) |
| 572 | { |
| 573 | int i; |
| 574 | int type; |
| 575 | int bounty; |
| 576 | char str[80]; |
| 577 | struct univ_object flip; |
| 578 | |
| 579 | |
| 580 | gfx_start_render(); |
| 581 | |
| 582 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 583 | { |
| 584 | type = universe[i].type; |
| 585 | |
| 586 | if (type != 0) |
| 587 | { |
| 588 | if (universe[i].flags & FLG_REMOVE) |
| 589 | { |
| 590 | if (type == SHIP_VIPER) |
| 591 | cmdr.legal_status |= 64; |
| 592 | |
| 593 | bounty = ship_list[type]->bounty; |
| 594 | |
| 595 | if ((bounty != 0) && (!witchspace)) |
| 596 | { |
| 597 | cmdr.credits += bounty; |
| 598 | sprintf (str, "%d.%d CR", cmdr.credits / 10, cmdr.credits % 10); |
| 599 | info_message (str); |
| 600 | } |
| 601 | |
| 602 | remove_ship (i); |
| 603 | continue; |
| 604 | } |
| 605 | |
| 606 | if ((detonate_bomb) && ((universe[i].flags & FLG_DEAD) == 0) && |
| 607 | (type != SHIP_PLANET) && (type != SHIP_SUN) && |
| 608 | (type != SHIP_CONSTRICTOR) && (type != SHIP_COUGAR) && |
| 609 | (type != SHIP_CORIOLIS) && (type != SHIP_DODEC)) |
| 610 | { |
| 611 | snd_play_sample (SND_EXPLODE); |
| 612 | universe[i].flags |= FLG_DEAD; |
| 613 | } |
| 614 | |
| 615 | if ((current_screen != SCR_INTRO_ONE) && |
| 616 | (current_screen != SCR_INTRO_TWO) && |
| 617 | (current_screen != SCR_GAME_OVER) && |
| 618 | (current_screen != SCR_ESCAPE_POD)) |
| 619 | { |
| 620 | tactics (i); |
| 621 | } |
| 622 | |
| 623 | move_univ_object (&universe[i]); |
| 624 | |
| 625 | flip = universe[i]; |
| 626 | switch_to_view (&flip); |
| 627 | |
| 628 | if (type == SHIP_PLANET) |
| 629 | { |
| 630 | if ((ship_count[SHIP_CORIOLIS] == 0) && |
| 631 | (ship_count[SHIP_DODEC] == 0) && |
| 632 | (universe[i].distance < 65792)) // was 49152 |
| 633 | { |
| 634 | make_station_appear(); |
| 635 | } |
| 636 | |
| 637 | draw_ship (&flip); |
| 638 | continue; |
| 639 | } |
| 640 | |
| 641 | if (type == SHIP_SUN) |
| 642 | { |
| 643 | draw_ship (&flip); |
| 644 | continue; |
| 645 | } |
| 646 | |
| 647 | |
| 648 | if (universe[i].distance < 170) |
| 649 | { |
| 650 | if ((type == SHIP_CORIOLIS) || (type == SHIP_DODEC)) |
| 651 | check_docking (i); |
| 652 | else |
| 653 | scoop_item(i); |
| 654 | |
| 655 | continue; |
| 656 | } |
| 657 | |
| 658 | if (universe[i].distance > 57344) |
| 659 | { |
| 660 | remove_ship (i); |
| 661 | continue; |
| 662 | } |
| 663 | |
| 664 | draw_ship (&flip); |
| 665 | |
| 666 | universe[i].flags = flip.flags; |
| 667 | universe[i].exp_seed = flip.exp_seed; |
| 668 | universe[i].exp_delta = flip.exp_delta; |
| 669 | |
| 670 | universe[i].flags &= ~FLG_FIRING; |
| 671 | |
| 672 | if (universe[i].flags & FLG_DEAD) |
| 673 | continue; |
| 674 | |
| 675 | check_target (i, &flip); |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | gfx_finish_render(); |
| 680 | detonate_bomb = 0; |
| 681 | } |
| 682 | |
| 683 | |
| 684 | |
| 685 | |
| 686 | /* |
| 687 | * Update the scanner and draw all the lollipops. |
| 688 | */ |
| 689 | |
| 690 | void update_scanner (void) |
| 691 | { |
| 692 | int i; |
| 693 | int x,y,z; |
| 694 | int x1,y1,y2; |
| 695 | int colour; |
| 696 | |
| 697 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 698 | { |
| 699 | if ((universe[i].type <= 0) || |
| 700 | (universe[i].flags & FLG_DEAD) || |
| 701 | (universe[i].flags & FLG_CLOAKED)) |
| 702 | continue; |
| 703 | |
| 704 | x = universe[i].location.x / 256; |
| 705 | y = universe[i].location.y / 256; |
| 706 | z = universe[i].location.z / 256; |
| 707 | |
| 708 | x1 = x; |
| 709 | y1 = -z / 4; |
| 710 | y2 = y1 - y / 2; |
| 711 | |
| 712 | if ((y2 < -28) || (y2 > 28) || |
| 713 | (x1 < -50) || (x1 > 50)) |
| 714 | continue; |
| 715 | |
| 716 | x1 += scanner_cx; |
| 717 | y1 += scanner_cy; |
| 718 | y2 += scanner_cy; |
| 719 | |
| 720 | colour = (universe[i].flags & FLG_HOSTILE) ? GFX_COL_YELLOW_5 : GFX_COL_WHITE; |
| 721 | |
| 722 | switch (universe[i].type) |
| 723 | { |
| 724 | case SHIP_MISSILE: |
| 725 | colour = 137; |
| 726 | break; |
| 727 | |
| 728 | case SHIP_DODEC: |
| 729 | case SHIP_CORIOLIS: |
| 730 | colour = GFX_COL_GREEN_1; |
| 731 | break; |
| 732 | |
| 733 | case SHIP_VIPER: |
| 734 | colour = 252; |
| 735 | break; |
| 736 | } |
| 737 | |
| 738 | gfx_draw_colour_line (x1+2, y2, x1-3, y2, colour); |
| 739 | gfx_draw_colour_line (x1+2, y2+1, x1-3, y2+1, colour); |
| 740 | gfx_draw_colour_line (x1+2, y2+2, x1-3, y2+2, colour); |
| 741 | gfx_draw_colour_line (x1+2, y2+3, x1-3, y2+3, colour); |
| 742 | |
| 743 | |
| 744 | gfx_draw_colour_line (x1, y1, x1, y2, colour); |
| 745 | gfx_draw_colour_line (x1+1, y1, x1+1, y2, colour); |
| 746 | gfx_draw_colour_line (x1+2, y1, x1+2, y2, colour); |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | |
| 751 | /* |
| 752 | * Update the compass which tracks the space station / planet. |
| 753 | */ |
| 754 | |
| 755 | void update_compass (void) |
| 756 | { |
| 757 | struct vector dest; |
| 758 | int compass_x; |
| 759 | int compass_y; |
| 760 | int un = 0; |
| 761 | |
| 762 | if (witchspace) |
| 763 | return; |
| 764 | |
| 765 | if (ship_count[SHIP_CORIOLIS] || ship_count[SHIP_DODEC]) |
| 766 | un = 1; |
| 767 | |
| 768 | dest = unit_vector (&universe[un].location); |
| 769 | |
| 770 | compass_x = compass_centre_x + (dest.x * 16); |
| 771 | compass_y = compass_centre_y + (dest.y * -16); |
| 772 | |
| 773 | if (dest.z < 0) |
| 774 | { |
| 775 | gfx_draw_sprite (IMG_RED_DOT, compass_x, compass_y); |
| 776 | } |
| 777 | else |
| 778 | { |
| 779 | gfx_draw_sprite (IMG_GREEN_DOT, compass_x, compass_y); |
| 780 | } |
| 781 | |
| 782 | } |
| 783 | |
| 784 | |
| 785 | /* |
| 786 | * Display the speed bar. |
| 787 | */ |
| 788 | |
| 789 | void display_speed (void) |
| 790 | { |
| 791 | int sx,sy; |
| 792 | int i; |
| 793 | int len; |
| 794 | int colour; |
| 795 | |
| 796 | sx = 417; |
| 797 | sy = 384 + 9; |
| 798 | |
| 799 | len = ((flight_speed * 64) / myship.max_speed) - 1; |
| 800 | |
| 801 | colour = (flight_speed > (myship.max_speed * 2 / 3)) ? GFX_COL_DARK_RED : GFX_COL_GOLD; |
| 802 | |
| 803 | for (i = 0; i < 6; i++) |
| 804 | { |
| 805 | gfx_draw_colour_line (sx, sy + i, sx + len, sy + i, colour); |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | |
| 810 | /* |
| 811 | * Draw an indicator bar. |
| 812 | * Used for shields and energy banks. |
| 813 | */ |
| 814 | |
| 815 | void display_dial_bar (int len, int x, int y) |
| 816 | { |
| 817 | int i = 0; |
| 818 | |
| 819 | gfx_draw_colour_line (x, y + 384, x + len, y + 384, GFX_COL_GOLD); |
| 820 | i++; |
| 821 | gfx_draw_colour_line (x, y + i + 384, x + len, y + i + 384, GFX_COL_GOLD); |
| 822 | |
| 823 | for (i = 2; i < 7; i++) |
| 824 | gfx_draw_colour_line (x, y + i + 384, x + len, y + i + 384, GFX_COL_YELLOW_1); |
| 825 | |
| 826 | gfx_draw_colour_line (x, y + i + 384, x + len, y + i + 384, GFX_COL_DARK_RED); |
| 827 | } |
| 828 | |
| 829 | |
| 830 | /* |
| 831 | * Display the current shield strengths. |
| 832 | */ |
| 833 | |
| 834 | void display_shields (void) |
| 835 | { |
| 836 | if (front_shield > 3) |
| 837 | display_dial_bar (front_shield / 4, 31, 7); |
| 838 | |
| 839 | if (aft_shield > 3) |
| 840 | display_dial_bar (aft_shield / 4, 31, 23); |
| 841 | } |
| 842 | |
| 843 | |
| 844 | void display_altitude (void) |
| 845 | { |
| 846 | if (myship.altitude > 3) |
| 847 | display_dial_bar (myship.altitude / 4, 31, 92); |
| 848 | } |
| 849 | |
| 850 | void display_cabin_temp (void) |
| 851 | { |
| 852 | if (myship.cabtemp > 3) |
| 853 | display_dial_bar (myship.cabtemp / 4, 31, 60); |
| 854 | } |
| 855 | |
| 856 | |
| 857 | void display_laser_temp (void) |
| 858 | { |
| 859 | if (laser_temp > 0) |
| 860 | display_dial_bar (laser_temp / 4, 31, 76); |
| 861 | } |
| 862 | |
| 863 | |
| 864 | /* |
| 865 | * Display the energy banks. |
| 866 | */ |
| 867 | |
| 868 | void display_energy (void) |
| 869 | { |
| 870 | int e1,e2,e3,e4; |
| 871 | |
| 872 | e1 = energy > 64 ? 64 : energy; |
| 873 | e2 = energy > 128 ? 64 : energy - 64; |
| 874 | e3 = energy > 192 ? 64 : energy - 128; |
| 875 | e4 = energy - 192; |
| 876 | |
| 877 | if (e4 > 0) |
| 878 | display_dial_bar (e4, 416, 61); |
| 879 | |
| 880 | if (e3 > 0) |
| 881 | display_dial_bar (e3, 416, 79); |
| 882 | |
| 883 | if (e2 > 0) |
| 884 | display_dial_bar (e2, 416, 97); |
| 885 | |
| 886 | if (e1 > 0) |
| 887 | display_dial_bar (e1, 416, 115); |
| 888 | } |
| 889 | |
| 890 | |
| 891 | |
| 892 | void display_flight_roll (void) |
| 893 | { |
| 894 | int sx,sy; |
| 895 | int i; |
| 896 | int pos; |
| 897 | |
| 898 | sx = 416; |
| 899 | sy = 384 + 9 + 14; |
| 900 | |
| 901 | pos = sx - ((flight_roll * 28) / myship.max_roll); |
| 902 | pos += 32; |
| 903 | |
| 904 | for (i = 0; i < 4; i++) |
| 905 | { |
| 906 | gfx_draw_colour_line (pos + i, sy, pos + i, sy + 7, GFX_COL_GOLD); |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | void display_flight_climb (void) |
| 911 | { |
| 912 | int sx,sy; |
| 913 | int i; |
| 914 | int pos; |
| 915 | |
| 916 | sx = 416; |
| 917 | sy = 384 + 9 + 14 + 16; |
| 918 | |
| 919 | pos = sx + ((flight_climb * 28) / myship.max_climb); |
| 920 | pos += 32; |
| 921 | |
| 922 | for (i = 0; i < 4; i++) |
| 923 | { |
| 924 | gfx_draw_colour_line (pos + i, sy, pos + i, sy + 7, GFX_COL_GOLD); |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | |
| 929 | void display_fuel (void) |
| 930 | { |
| 931 | if (cmdr.fuel > 0) |
| 932 | display_dial_bar ((cmdr.fuel * 64) / myship.max_fuel, 31, 44); |
| 933 | } |
| 934 | |
| 935 | |
| 936 | void display_missiles (void) |
| 937 | { |
| 938 | int nomiss; |
| 939 | int x,y; |
| 940 | |
| 941 | if (cmdr.missiles == 0) |
| 942 | return; |
| 943 | |
| 944 | nomiss = cmdr.missiles > 4 ? 4 : cmdr.missiles; |
| 945 | |
| 946 | x = (4 - nomiss) * 16 + 35; |
| 947 | y = 113 + 385; |
| 948 | |
| 949 | if (missile_target != MISSILE_UNARMED) |
| 950 | { |
| 951 | gfx_draw_sprite ((missile_target < 0) ? IMG_MISSILE_YELLOW : |
| 952 | IMG_MISSILE_RED, x, y); |
| 953 | x += 16; |
| 954 | nomiss--; |
| 955 | } |
| 956 | |
| 957 | for (; nomiss > 0; nomiss--) |
| 958 | { |
| 959 | gfx_draw_sprite (IMG_MISSILE_GREEN, x, y); |
| 960 | x += 16; |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | |
| 965 | void update_console (void) |
| 966 | { |
| 967 | gfx_set_clip_region (0, 0, 512, 512); |
| 968 | gfx_draw_scanner(); |
| 969 | |
| 970 | display_speed(); |
| 971 | display_flight_climb(); |
| 972 | display_flight_roll(); |
| 973 | display_shields(); |
| 974 | display_altitude(); |
| 975 | display_energy(); |
| 976 | display_cabin_temp(); |
| 977 | display_laser_temp(); |
| 978 | display_fuel(); |
| 979 | display_missiles(); |
| 980 | |
| 981 | if (docked) |
| 982 | return; |
| 983 | |
| 984 | update_scanner(); |
| 985 | update_compass(); |
| 986 | |
| 987 | if (ship_count[SHIP_CORIOLIS] || ship_count[SHIP_DODEC]) |
| 988 | gfx_draw_sprite (IMG_BIG_S, 387, 490); |
| 989 | |
| 990 | if (ecm_active) |
| 991 | gfx_draw_sprite (IMG_BIG_E, 115, 490); |
| 992 | } |
| 993 | |
| 994 | void increase_flight_roll (void) |
| 995 | { |
| 996 | if (flight_roll < myship.max_roll) |
| 997 | flight_roll++; |
| 998 | } |
| 999 | |
| 1000 | |
| 1001 | void decrease_flight_roll (void) |
| 1002 | { |
| 1003 | if (flight_roll > -myship.max_roll) |
| 1004 | flight_roll--; |
| 1005 | } |
| 1006 | |
| 1007 | |
| 1008 | void increase_flight_climb (void) |
| 1009 | { |
| 1010 | if (flight_climb < myship.max_climb) |
| 1011 | flight_climb++; |
| 1012 | } |
| 1013 | |
| 1014 | void decrease_flight_climb (void) |
| 1015 | { |
| 1016 | if (flight_climb > -myship.max_climb) |
| 1017 | flight_climb--; |
| 1018 | } |
| 1019 | |
| 1020 | |
| 1021 | void start_hyperspace (void) |
| 1022 | { |
| 1023 | if (hyper_ready) |
| 1024 | return; |
| 1025 | |
| 1026 | hyper_distance = calc_distance_to_planet (docked_planet, hyperspace_planet); |
| 1027 | |
| 1028 | if ((hyper_distance == 0) || (hyper_distance > cmdr.fuel)) |
| 1029 | return; |
| 1030 | |
| 1031 | destination_planet = hyperspace_planet; |
| 1032 | name_planet (hyper_name, destination_planet); |
| 1033 | capitalise_name (hyper_name); |
| 1034 | |
| 1035 | hyper_ready = 1; |
| 1036 | hyper_countdown = 15; |
| 1037 | hyper_galactic = 0; |
| 1038 | |
| 1039 | disengage_auto_pilot(); |
| 1040 | } |
| 1041 | |
| 1042 | void start_galactic_hyperspace (void) |
| 1043 | { |
| 1044 | if (hyper_ready) |
| 1045 | return; |
| 1046 | |
| 1047 | if (cmdr.galactic_hyperdrive == 0) |
| 1048 | return; |
| 1049 | |
| 1050 | hyper_ready = 1; |
| 1051 | hyper_countdown = 2; |
| 1052 | hyper_galactic = 1; |
| 1053 | disengage_auto_pilot(); |
| 1054 | } |
| 1055 | |
| 1056 | |
| 1057 | |
| 1058 | void display_hyper_status (void) |
| 1059 | { |
| 1060 | char str[80]; |
| 1061 | |
| 1062 | sprintf (str, "%d", hyper_countdown); |
| 1063 | |
| 1064 | if ((current_screen == SCR_FRONT_VIEW) || (current_screen == SCR_REAR_VIEW) || |
| 1065 | (current_screen == SCR_LEFT_VIEW) || (current_screen == SCR_RIGHT_VIEW)) |
| 1066 | { |
| 1067 | gfx_display_text (5, 5, str); |
| 1068 | if (hyper_galactic) |
| 1069 | { |
| 1070 | gfx_display_centre_text (358, "Galactic Hyperspace", 120, GFX_COL_WHITE); |
| 1071 | } |
| 1072 | else |
| 1073 | { |
| 1074 | sprintf (str, "Hyperspace - %s", hyper_name); |
| 1075 | gfx_display_centre_text (358, str, 120, GFX_COL_WHITE); |
| 1076 | } |
| 1077 | } |
| 1078 | else |
| 1079 | { |
| 1080 | gfx_clear_area (5, 5, 25, 34); |
| 1081 | gfx_display_text (5, 5, str); |
| 1082 | } |
| 1083 | } |
| 1084 | |
| 1085 | |
| 1086 | int rotate_byte_left (int x) |
| 1087 | { |
| 1088 | return ((x << 1) | (x >> 7)) & 255; |
| 1089 | } |
| 1090 | |
| 1091 | void enter_next_galaxy (void) |
| 1092 | { |
| 1093 | cmdr.galaxy_number++; |
| 1094 | cmdr.galaxy_number &= 7; |
| 1095 | |
| 1096 | cmdr.galaxy.a = rotate_byte_left (cmdr.galaxy.a); |
| 1097 | cmdr.galaxy.b = rotate_byte_left (cmdr.galaxy.b); |
| 1098 | cmdr.galaxy.c = rotate_byte_left (cmdr.galaxy.c); |
| 1099 | cmdr.galaxy.d = rotate_byte_left (cmdr.galaxy.d); |
| 1100 | cmdr.galaxy.e = rotate_byte_left (cmdr.galaxy.e); |
| 1101 | cmdr.galaxy.f = rotate_byte_left (cmdr.galaxy.f); |
| 1102 | |
| 1103 | docked_planet = find_planet (0x60, 0x60); |
| 1104 | hyperspace_planet = docked_planet; |
| 1105 | } |
| 1106 | |
| 1107 | |
| 1108 | |
| 1109 | |
| 1110 | |
| 1111 | void enter_witchspace (void) |
| 1112 | { |
| 1113 | int i; |
| 1114 | int nthg; |
| 1115 | |
| 1116 | witchspace = 1; |
| 1117 | docked_planet.b ^= 31; |
| 1118 | in_battle = 1; |
| 1119 | |
| 1120 | flight_speed = 12; |
| 1121 | flight_roll = 0; |
| 1122 | flight_climb = 0; |
| 1123 | create_new_stars(); |
| 1124 | clear_universe(); |
| 1125 | |
| 1126 | nthg = (randint() & 3) + 1; |
| 1127 | |
| 1128 | for (i = 0; i < nthg; i++) |
| 1129 | create_thargoid(); |
| 1130 | |
| 1131 | current_screen = SCR_BREAK_PATTERN; |
| 1132 | snd_play_sample (SND_HYPERSPACE); |
| 1133 | } |
| 1134 | |
| 1135 | |
| 1136 | void complete_hyperspace (void) |
| 1137 | { |
| 1138 | Matrix rotmat; |
| 1139 | int px,py,pz; |
| 1140 | |
| 1141 | hyper_ready = 0; |
| 1142 | witchspace = 0; |
| 1143 | |
| 1144 | if (hyper_galactic) |
| 1145 | { |
| 1146 | cmdr.galactic_hyperdrive = 0; |
| 1147 | enter_next_galaxy(); |
| 1148 | cmdr.legal_status = 0; |
| 1149 | } |
| 1150 | else |
| 1151 | { |
| 1152 | cmdr.fuel -= hyper_distance; |
| 1153 | cmdr.legal_status /= 2; |
| 1154 | |
| 1155 | if ((rand255() > 253) || (flight_climb == myship.max_climb)) |
| 1156 | { |
| 1157 | enter_witchspace(); |
| 1158 | return; |
| 1159 | } |
| 1160 | |
| 1161 | docked_planet = destination_planet; |
| 1162 | } |
| 1163 | |
| 1164 | cmdr.market_rnd = rand255(); |
| 1165 | generate_planet_data (¤t_planet_data, docked_planet); |
| 1166 | generate_stock_market (); |
| 1167 | |
| 1168 | flight_speed = 12; |
| 1169 | flight_roll = 0; |
| 1170 | flight_climb = 0; |
| 1171 | create_new_stars(); |
| 1172 | clear_universe(); |
| 1173 | |
| 1174 | generate_landscape(docked_planet.a * 251 + docked_planet.b); |
| 1175 | set_init_matrix (rotmat); |
| 1176 | |
| 1177 | pz = (((docked_planet.b) & 7) + 7) / 2; |
| 1178 | px = pz / 2; |
| 1179 | py = px; |
| 1180 | |
| 1181 | px <<= 16; |
| 1182 | py <<= 16; |
| 1183 | pz <<= 16; |
| 1184 | |
| 1185 | if ((docked_planet.b & 1) == 0) |
| 1186 | { |
| 1187 | px = -px; |
| 1188 | py = -py; |
| 1189 | } |
| 1190 | |
| 1191 | add_new_ship (SHIP_PLANET, px, py, pz, rotmat, 0, 0); |
| 1192 | |
| 1193 | |
| 1194 | pz = -(((docked_planet.d & 7) | 1) << 16); |
| 1195 | px = ((docked_planet.f & 3) << 16) | ((docked_planet.f & 3) << 8); |
| 1196 | |
| 1197 | add_new_ship (SHIP_SUN, px, py, pz, rotmat, 0, 0); |
| 1198 | |
| 1199 | current_screen = SCR_BREAK_PATTERN; |
| 1200 | snd_play_sample (SND_HYPERSPACE); |
| 1201 | } |
| 1202 | |
| 1203 | |
| 1204 | void countdown_hyperspace (void) |
| 1205 | { |
| 1206 | if (hyper_countdown == 0) |
| 1207 | { |
| 1208 | complete_hyperspace(); |
| 1209 | return; |
| 1210 | } |
| 1211 | |
| 1212 | hyper_countdown--; |
| 1213 | } |
| 1214 | |
| 1215 | |
| 1216 | |
| 1217 | void jump_warp (void) |
| 1218 | { |
| 1219 | int i; |
| 1220 | int type; |
| 1221 | int jump; |
| 1222 | |
| 1223 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 1224 | { |
| 1225 | type = universe[i].type; |
| 1226 | |
| 1227 | if ((type > 0) && (type != SHIP_ASTEROID) && (type != SHIP_CARGO) && |
| 1228 | (type != SHIP_ALLOY) && (type != SHIP_ROCK) && |
| 1229 | (type != SHIP_BOULDER) && (type != SHIP_ESCAPE_CAPSULE)) |
| 1230 | { |
| 1231 | info_message ("Mass Locked"); |
| 1232 | return; |
| 1233 | } |
| 1234 | } |
| 1235 | |
| 1236 | if ((universe[0].distance < 75001) || (universe[1].distance < 75001)) |
| 1237 | { |
| 1238 | info_message ("Mass Locked"); |
| 1239 | return; |
| 1240 | } |
| 1241 | |
| 1242 | |
| 1243 | if (universe[0].distance < universe[1].distance) |
| 1244 | jump = universe[0].distance - 75000; |
| 1245 | else |
| 1246 | jump = universe[1].distance - 75000; |
| 1247 | |
| 1248 | if (jump > 1024) |
| 1249 | jump = 1024; |
| 1250 | |
| 1251 | for (i = 0; i < MAX_UNIV_OBJECTS; i++) |
| 1252 | { |
| 1253 | if (universe[i].type != 0) |
| 1254 | universe[i].location.z -= jump; |
| 1255 | } |
| 1256 | |
| 1257 | warp_stars = 1; |
| 1258 | mcount &= 63; |
| 1259 | in_battle = 0; |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | void launch_player (void) |
| 1264 | { |
| 1265 | Matrix rotmat; |
| 1266 | |
| 1267 | docked = 0; |
| 1268 | flight_speed = 12; |
| 1269 | flight_roll = -15; |
| 1270 | flight_climb = 0; |
| 1271 | cmdr.legal_status |= carrying_contraband(); |
| 1272 | create_new_stars(); |
| 1273 | clear_universe(); |
| 1274 | generate_landscape(docked_planet.a * 251 + docked_planet.b); |
| 1275 | set_init_matrix (rotmat); |
| 1276 | add_new_ship (SHIP_PLANET, 0, 0, 65536, rotmat, 0, 0); |
| 1277 | |
| 1278 | rotmat[2].x = -rotmat[2].x; |
| 1279 | rotmat[2].y = -rotmat[2].y; |
| 1280 | rotmat[2].z = -rotmat[2].z; |
| 1281 | add_new_station (0, 0, -256, rotmat); |
| 1282 | |
| 1283 | current_screen = SCR_BREAK_PATTERN; |
| 1284 | snd_play_sample (SND_LAUNCH); |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | |
| 1289 | /* |
| 1290 | * Engage the docking computer. |
| 1291 | * For the moment we just do an instant dock if we are in the safe zone. |
| 1292 | */ |
| 1293 | |
| 1294 | void engage_docking_computer (void) |
| 1295 | { |
| 1296 | if (ship_count[SHIP_CORIOLIS] || ship_count[SHIP_DODEC]) |
| 1297 | { |
| 1298 | snd_play_sample (SND_DOCK); |
| 1299 | dock_player(); |
| 1300 | current_screen = SCR_BREAK_PATTERN; |
| 1301 | } |
| 1302 | } |
| 1303 | |