mdw@git.distorted.org.uk Git - newkind/blob - space.c

   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 (&current_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