84bbd123 |
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 | |