2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2015, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * shpsub.c: Ship subroutine stuff
29 * Known contributors to this file:
31 * Steve McClure, 1996-2000
32 * Markus Armbruster, 2006-2015
50 #include "prototypes.h"
56 static void shp_nav_put_one(struct ulist *);
57 static int shp_check_one_mines(struct ulist *);
58 static int shp_hit_mine(struct shpstr *);
59 static void shp_stays(natid, char *, struct ulist *);
62 shp_find_capable(struct emp_qelem *list, int flags)
67 for (qp = list->q_back; qp != list; qp = qp->q_back) {
68 mlp = (struct ulist *)qp;
69 if (mchr[mlp->unit.ship.shp_type].m_flags & flags)
76 shp_may_nav(struct shpstr *sp, struct shpstr *flg, char *suffix)
80 if (!sp->shp_own || !getsect(sp->shp_x, sp->shp_y, §)) {
85 if (opt_MARKET && ontradingblock(EF_SHIP, sp)) {
86 mpr(sp->shp_own, "%s is on the trading block%s\n",
91 if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
92 mpr(sp->shp_own, "%s is crewless%s\n", prship(sp), suffix);
96 switch (shp_check_nav(sp, §)) {
99 case SHP_STUCK_CONSTRUCTION:
100 mpr(sp->shp_own, "%s is caught in a construction zone%s\n",
106 case SHP_STUCK_CANAL:
107 case SHP_STUCK_IMPASSABLE:
108 mpr(sp->shp_own, "%s is landlocked%s\n", prship(sp), suffix);
112 if (flg && (sp->shp_x != flg->shp_x || sp->shp_y != flg->shp_y)) {
113 mpr(sp->shp_own, "%s is not with the flagship%s\n",
121 shp_sel(struct nstr_item *ni, struct emp_qelem *list)
123 struct shpstr ship, *flg = NULL;
127 while (nxtitem(ni, &ship)) {
129 * It would be nice to let deities navigate foreign ships, but
130 * much of the code assumes that only the ship's owner can
133 if (!ship.shp_own || ship.shp_own != player->cnum)
135 if (!shp_may_nav(&ship, flg, ""))
138 ship.shp_mission = 0;
140 memset(ship.shp_rpath, 0, sizeof(ship.shp_rpath));
141 putship(ship.shp_uid, &ship);
142 mlp = shp_insque(&ship, list);
144 flg = &mlp->unit.ship;
150 * Return the new list link.
153 shp_insque(struct shpstr *sp, struct emp_qelem *list)
155 struct ulist *mlp = malloc(sizeof(struct ulist));
157 mlp->unit.ship = *sp;
158 mlp->mobil = sp->shp_mobil;
159 emp_insque(&mlp->queue, list);
163 /* This function assumes that the list was created by shp_sel */
165 shp_nav(struct emp_qelem *list, double *minmobp, double *maxmobp,
168 struct emp_qelem *qp;
169 struct emp_qelem *next;
171 struct shpstr *sp, *flg = NULL;
176 for (qp = list->q_back; qp != list; qp = next) {
178 mlp = (struct ulist *)qp;
179 sp = &mlp->unit.ship;
180 getship(sp->shp_uid, sp);
182 if (sp->shp_own != actor) {
183 mpr(actor, "%s was sunk at %s\n",
184 prship(sp), xyas(sp->shp_x, sp->shp_y, actor));
185 emp_remque(&mlp->queue);
190 snprintf(and_stays, sizeof(and_stays), " & stays in %s",
191 xyas(sp->shp_x, sp->shp_y, actor));
192 if (!shp_may_nav(sp, flg, and_stays)) {
193 shp_nav_put_one(mlp);
199 if (sp->shp_mobil + 1 < (int)mlp->mobil) {
200 mlp->mobil = sp->shp_mobil;
202 if (mlp->mobil < *minmobp)
203 *minmobp = mlp->mobil;
204 if (mlp->mobil > *maxmobp)
205 *maxmobp = mlp->mobil;
210 shp_nav_put(struct emp_qelem *list, natid actor)
212 struct emp_qelem *qp, *next;
216 for (qp = list->q_back; qp != list; qp = next) {
218 mlp = (struct ulist *)qp;
219 sp = &mlp->unit.ship;
220 mpr(actor, "%s stopped at %s\n",
221 prship(sp), xyas(sp->shp_x, sp->shp_y, actor));
222 shp_nav_put_one(mlp);
227 shp_nav_put_one(struct ulist *mlp)
229 mlp->unit.ship.shp_mobil = (int)mlp->mobil;
230 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
231 emp_remque(&mlp->queue);
236 * Sweep seamines with engineers in SHIP_LIST for ACTOR.
237 * All ships in SHIP_LIST must be in the same sector.
238 * If EXPLICIT is non-zero, this is for an explicit sweep command from
239 * a player. Else it's an automatic "on the move" sweep.
240 * If TAKEMOB is non-zero, require and charge mobility.
241 * Return non-zero when the ships should stop.
244 shp_sweep(struct emp_qelem *ship_list, int explicit, int takemob,
247 struct emp_qelem *qp;
248 struct emp_qelem *next;
251 int mines, m, max, shells;
253 int stopping = 0, first = 1;
255 mlp = shp_find_capable(ship_list, M_SWEEP);
258 mpr(actor, "No minesweepers!\n");
262 getsect(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, §);
263 if (sect.sct_type != SCT_WATER) {
265 mpr(actor, "%s is a %s. No seamines there!\n",
266 xyas(sect.sct_x, sect.sct_y, actor),
267 dchr[sect.sct_type].d_name);
271 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
273 mlp = (struct ulist *)qp;
274 if (!(mchr[mlp->unit.ship.shp_type].m_flags & M_SWEEP))
277 if (mlp->mobil <= 0.0) {
279 mpr(actor, "%s is out of mobility!\n",
280 prship(&mlp->unit.ship));
283 mlp->mobil -= shp_mobcost(&mlp->unit.ship);
284 mlp->unit.ship.shp_mobil = (int)mlp->mobil;
286 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
287 getsect(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, §);
288 if (!(mines = sect.sct_mines))
290 max = mchr[mlp->unit.ship.shp_type].m_item[I_SHELL];
291 shells = mlp->unit.ship.shp_item[I_SHELL];
292 for (m = 0; mines > 0 && m < 5; m++) {
295 mpr(actor, "Approaching minefield at %s...\n",
296 xyas(sect.sct_x, sect.sct_y, actor));
299 mpr(actor, "Sweep...\n");
301 shells = MIN(max, shells + 1);
302 changed |= map_set(actor, sect.sct_x, sect.sct_y, 'X', 0);
305 sect.sct_mines = mines;
306 mlp->unit.ship.shp_item[I_SHELL] = shells;
307 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
309 if (shp_check_one_mines(mlp)) {
321 shp_check_one_mines(struct ulist *mlp)
326 getsect(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, §);
327 if (sect.sct_type != SCT_WATER)
331 if (chance(DMINE_HITCHANCE(sect.sct_mines))) {
332 actor = mlp->unit.ship.shp_own;
333 shp_hit_mine(&mlp->unit.ship);
335 if (map_set(actor, sect.sct_x, sect.sct_y, 'X', 0))
338 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
339 if (!mlp->unit.ship.shp_own)
346 shp_check_mines(struct emp_qelem *ship_list)
348 struct emp_qelem *qp;
349 struct emp_qelem *next;
353 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
355 mlp = (struct ulist *)qp;
356 if (shp_check_one_mines(mlp)) {
367 shp_stays(natid actor, char *str, struct ulist *mlp)
369 mpr(actor, "%s %s & stays in %s\n",
370 prship(&mlp->unit.ship), str,
371 xyas(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y, actor));
372 shp_nav_put_one(mlp);
376 * Return whether and why SP would be stuck in SECTP.
379 shp_check_nav(struct shpstr *sp, struct sctstr *sectp)
381 switch (dchr[sectp->sct_type].d_nav) {
385 if (!(mchr[sp->shp_type].m_flags & M_CANAL)) {
386 return SHP_STUCK_CANAL;
390 if (sectp->sct_effic < 2)
391 return SHP_STUCK_CONSTRUCTION;
394 if (sectp->sct_effic < 60)
395 return SHP_STUCK_CONSTRUCTION;
401 return SHP_STUCK_IMPASSABLE;
403 return SHP_STUCK_NOT;
407 sect_has_dock(struct sctstr *sect)
409 switch (dchr[sect->sct_type].d_nav) {
419 shp_count(struct emp_qelem *list, int wantflags, int nowantflags,
422 struct emp_qelem *qp;
423 struct emp_qelem *next;
427 for (qp = list->q_back; qp != list; qp = next) {
429 mlp = (struct ulist *)qp;
430 if (mlp->unit.ship.shp_x != x || mlp->unit.ship.shp_y != y)
433 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
436 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
444 shp_damage_one(struct ulist *mlp, int dam)
446 /* ship might have changed (launched interceptors, missile defense) */
447 getship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
448 shipdamage(&mlp->unit.ship, dam);
449 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
450 if (!mlp->unit.ship.shp_own) {
451 emp_remque(&mlp->queue);
457 shp_damage(struct emp_qelem *list, int totdam, int wantflags,
458 int nowantflags, int x, int y)
460 struct emp_qelem *qp;
461 struct emp_qelem *next;
467 || !(count = shp_count(list, wantflags, nowantflags, x, y)))
469 dam = ldround((double)totdam / count, 1);
470 for (qp = list->q_back; qp != list; qp = next) {
472 mlp = (struct ulist *)qp;
473 if (mlp->unit.ship.shp_x != x || mlp->unit.ship.shp_y != y)
476 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
479 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
481 shp_damage_one(mlp, dam);
487 shp_contains(struct emp_qelem *list, int newx, int newy, int wantflags,
490 struct emp_qelem *qp;
491 struct emp_qelem *next;
494 for (qp = list->q_back; qp != list; qp = next) {
496 mlp = (struct ulist *)qp;
497 /* If the ship isn't in the requested sector, then continue */
498 if (newx != mlp->unit.ship.shp_x || newy != mlp->unit.ship.shp_y)
501 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
504 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
511 static struct ulist *
512 most_valuable_ship(struct emp_qelem *list, coord x, coord y)
514 struct emp_qelem *qp;
515 struct emp_qelem *next;
517 struct ulist *mvs = NULL;
519 for (qp = list->q_back; qp != list; qp = next) {
521 mlp = (struct ulist *)qp;
522 if (mlp->unit.ship.shp_x != x || mlp->unit.ship.shp_y != y)
524 if (mchr[mlp->unit.ship.shp_type].m_flags & M_SUB)
526 if (!mchr[mlp->unit.ship.shp_type].m_nxlight &&
527 !mchr[mlp->unit.ship.shp_type].m_nchoppers &&
528 mchr[mlp->unit.ship.shp_type].m_cost < 1000 &&
529 !mchr[mlp->unit.ship.shp_type].m_nplanes &&
530 !mchr[mlp->unit.ship.shp_type].m_nland)
536 if (mchr[mlp->unit.ship.shp_type].m_cost * mlp->unit.ship.shp_effic >
537 mchr[mvs->unit.ship.shp_type].m_cost * mvs->unit.ship.shp_effic)
544 shp_easiest_target(struct emp_qelem *list, int wantflags, int nowantflags)
546 struct emp_qelem *qp;
547 struct emp_qelem *next;
550 int easiest = 9876; /* things start great for victim */
553 for (qp = list->q_back; qp != list; qp = next) {
555 mlp = (struct ulist *)qp;
557 (mchr[mlp->unit.ship.shp_type].m_flags & wantflags) != wantflags)
560 mchr[mlp->unit.ship.shp_type].m_flags & nowantflags)
562 hard = shp_hardtarget(&mlp->unit.ship);
564 easiest = hard; /* things get worse for victim */
567 return easiest - count;
571 shp_missile_interdiction(struct emp_qelem *list, coord newx, coord newy,
576 struct emp_qelem msl_list, *qp, *newqp;
580 mvs = most_valuable_ship(list, newx, newy);
584 msl_sel(&msl_list, newx, newy, victim, P_T | P_MAR, 0, MI_INTERDICT);
586 for (qp = msl_list.q_back; qp != &msl_list; qp = newqp) {
588 plp = (struct plist *)qp;
590 if (mvs && mission_pln_equip(plp, NULL, 'p') >= 0) {
591 if (msl_launch(&plp->plane, EF_SHIP, prship(&mvs->unit.ship),
592 newx, newy, victim, &sublaunch) < 0)
595 if (msl_hit(&plp->plane,
596 shp_hardtarget(&mvs->unit.ship), EF_SHIP,
597 N_SHP_MISS, N_SHP_SMISS, sublaunch, victim)) {
598 dam = pln_damage(&plp->plane, 'p', 1);
600 "missile interdiction mission does %d damage to %s!\n",
601 dam, prship(&mvs->unit.ship));
602 shp_damage_one(mvs, dam);
604 dam = pln_damage(&plp->plane, 'p', 0);
605 collateral_damage(newx, newy, dam);
607 mvs = most_valuable_ship(list, newx, newy);
609 plp->plane.pln_effic = 0;
610 putplane(plp->plane.pln_uid, &plp->plane);
619 /* Note that this function has a side effect - it uses coastwatch
620 * ranges to see if it should fire upon a ship. So, this function
621 * is expected to return positive if a ship is in range, and 0 if a
622 * ship is not in range. */
624 notify_coastguard(struct emp_qelem *list, int trange, struct sctstr *sectp)
626 struct emp_qelem *qp;
627 struct emp_qelem *next;
632 natp = getnatp(sectp->sct_own);
634 vrange = sectp->sct_type == SCT_RADAR ? 14 : 4;
635 vrange *= tfact(sectp->sct_own, 1.0) * sectp->sct_effic / 100.0;
643 for (qp = list->q_back; qp != list; qp = next) {
645 mlp = (struct ulist *)qp;
646 if (mchr[mlp->unit.ship.shp_type].m_flags & M_SUB)
648 if (natp->nat_flags & NF_COASTWATCH)
649 wu(0, sectp->sct_own,
650 "%s %s sighted at %s\n",
651 cname(mlp->unit.ship.shp_own),
652 prship(&mlp->unit.ship),
653 xyas(mlp->unit.ship.shp_x, mlp->unit.ship.shp_y,
656 setcont(sectp->sct_own, mlp->unit.ship.shp_own, FOUND_COAST);
663 shp_fort_interdiction(struct emp_qelem *list, coord newx, coord newy,
672 signed char notified[MAXNOC];
675 /* Inform neutral and worse */
676 for (i = 0; i < MAXNOC; ++i) {
677 if (relations_with(i, victim) <= NEUTRAL)
683 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
684 while (nxtsct(&ns, &fsect)) {
687 if (fsect.sct_own == victim)
689 if (notified[fsect.sct_own])
691 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
692 if (notify_coastguard(list, trange, &fsect))
693 notified[fsect.sct_own] = 1;
695 if (opt_NO_FORT_FIRE)
696 return 0; /* Only coastwatch notify in nofortfire */
697 /* Only fire at Hostile ships */
698 for (i = 0; i < MAXNOC; ++i) {
699 if (relations_with(i, victim) >= NEUTRAL)
702 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
703 while (nxtsct(&ns, &fsect)) {
704 if (!notified[fsect.sct_own])
706 range = roundrange(fortrange(&fsect));
707 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
710 dam = fort_fire(&fsect);
716 mpr(victim, "Incoming fire does %d damage!\n", dam);
718 mpr(victim, "%s fires at you for %d!\n",
719 xyas(fsect.sct_x, fsect.sct_y, victim), dam);
722 "%s fires at %s ships in %s for %d!\n",
723 xyas(fsect.sct_x, fsect.sct_y,
725 cname(victim), xyas(newx, newy, fsect.sct_own), dam);
726 nreport(fsect.sct_own, N_SHP_SHELL, victim, 1);
729 shp_damage(list, totdam, 0, M_SUB, newx, newy);
734 shp_mission_interdiction(struct emp_qelem *list, coord x, coord y,
735 natid victim, int subs)
737 char *what = subs ? "subs" : "ships";
738 int wantflags = subs ? M_SUB : 0;
739 int nowantflags = subs ? 0 : M_SUB;
740 int mission = subs ? MI_SINTERDICT : MI_INTERDICT;
743 dam = unit_interdict(x, y, victim, what,
744 shp_easiest_target(list, wantflags, nowantflags),
747 shp_damage(list, dam, wantflags, nowantflags, x, y);
752 shp_interdict(struct emp_qelem *list, coord newx, coord newy, natid victim)
756 if (shp_contains(list, newx, newy, 0, M_SUB)) {
757 stopping |= shp_fort_interdiction(list, newx, newy, victim);
759 if (shp_contains(list, newx, newy, 0, M_SUB)) {
760 stopping |= shp_mission_interdiction(list, newx, newy, victim, 0);
761 stopping |= shp_missile_interdiction(list, newx, newy, victim);
764 if (shp_contains(list, newx, newy, M_SUB, 0))
765 stopping |= shp_mission_interdiction(list, newx, newy, victim, 1);
769 /* high value of hardtarget is harder to hit */
771 shp_hardtarget(struct shpstr *sp)
775 struct mchrstr *mcp = mchr + sp->shp_type;
778 getsect(sp->shp_x, sp->shp_y, §);
779 onsea = sect.sct_type == SCT_WATER;
780 if (mcp->m_flags & M_SUB)
782 return (int)((sp->shp_effic / 100.0) *
783 (20 + shp_speed(sp) * onsea / 2.0 - vis));
787 shp_hit_mine(struct shpstr *sp)
791 mpr(sp->shp_own, "Kawhomp! Mine detected in %s!\n",
792 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
794 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
797 if (mchr[sp->shp_type].m_flags & M_SWEEP)
800 shipdamage(sp, ldround(m, 1));
806 shp_nav_one_sector(struct emp_qelem *list, int dir, natid actor)
809 struct emp_qelem *qp;
810 struct emp_qelem *next;
817 enum shp_stuck stuck;
822 if (CANT_HAPPEN(QEMPTY(list)))
825 if (dir <= DIR_STOP || dir > DIR_LAST) {
826 CANT_HAPPEN(dir != DIR_STOP);
827 shp_nav_put(list, actor);
833 mlp = (struct ulist *)list->q_back;
834 newx = xnorm(mlp->unit.ship.shp_x + dx);
835 newy = ynorm(mlp->unit.ship.shp_y + dy);
836 getsect(newx, newy, §);
838 if (sect.sct_own && relations_with(sect.sct_own, actor) < FRIENDLY) {
839 mpr(actor, "can't go to %s\n", xyas(newx, newy, actor));
844 for (qp = list->q_back; qp != list; qp = next) {
846 mlp = (struct ulist *)qp;
847 switch (shp_check_nav(&mlp->unit.ship, §)) {
851 case SHP_STUCK_CANAL:
856 case SHP_STUCK_CONSTRUCTION:
857 case SHP_STUCK_IMPASSABLE:
858 mpr(actor, "can't go to %s\n", xyas(newx, newy, actor));
863 mpr(actor, "is too large to fit into the canal system at %s\n",
864 xyas(newx, newy, actor));
868 for (qp = list->q_back; qp != list; qp = next) {
870 mlp = (struct ulist *)qp;
871 stuck = shp_check_nav(&mlp->unit.ship, §);
872 if (stuck == SHP_STUCK_CANAL) {
874 "is too large to fit into the canal system at %s",
875 xyas(newx, newy, actor));
876 shp_stays(actor, dp, mlp);
878 } else if (CANT_HAPPEN(stuck != SHP_STUCK_NOT)) {
879 sprintf(dp, "can't go to %s", xyas(newx, newy, actor));
880 shp_stays(actor, dp, mlp);
884 if (mlp->mobil <= 0.0) {
885 shp_stays(actor, "is out of mobility", mlp);
888 mobcost = shp_mobcost(&mlp->unit.ship);
889 mlp->unit.ship.shp_x = newx;
890 mlp->unit.ship.shp_y = newy;
891 if (mlp->mobil - mobcost < -127) {
894 mlp->mobil -= mobcost;
896 mlp->unit.ship.shp_mobil = (int)mlp->mobil;
897 putship(mlp->unit.ship.shp_uid, &mlp->unit.ship);
899 /* Now update the map for this ship */
900 rad_map_set(mlp->unit.ship.shp_own,
901 mlp->unit.ship.shp_x, mlp->unit.ship.shp_y,
902 mlp->unit.ship.shp_effic, mlp->unit.ship.shp_tech,
903 mchr[mlp->unit.ship.shp_type].m_vrnge);
907 stopping |= shp_sweep(list, 0, 0, actor);
910 stopping |= shp_check_mines(list);
913 stopping |= shp_interdict(list, newx, newy, actor);
920 * Check for incoming missiles with a P_MAR flag.
921 * Return True=1 if the missile was shotdown.
924 * Chad Zabel, July 95
928 shp_missile_defense(coord dx, coord dy, natid bombown, int hardtarget)
933 double gun, eff, teff;
935 snxtitem_dist(&ni, EF_SHIP, dx, dy, 1);
937 while (nxtitem(&ni, &ship)) {
941 if (!(mchr[(int)ship.shp_type].m_flags & M_ANTIMISSILE))
944 if (relations_with(ship.shp_own, bombown) >= NEUTRAL)
947 if (ship.shp_effic < 60)
950 if (ship.shp_item[I_MILIT] < 1) /* do we have mil? */
952 if (ship.shp_item[I_GUN] < 1) /* we need at least 1 gun */
954 if (!shp_supply(&ship, I_SHELL, 2))
956 ship.shp_item[I_SHELL] -= 2;
957 putship(ship.shp_uid, &ship);
959 /* now calculate the odds */
960 gun = shp_usable_guns(&ship);
961 eff = ship.shp_effic / 100.0;
962 teff = ship.shp_tech / (ship.shp_tech + 200.0);
963 /* raise 4.5 for better interception -KHS */
964 hitchance = (int)(gun * eff * teff * 4.5) - hardtarget;
965 hitchance = LIMIT_TO(hitchance, 0, 100);
966 hit = pct_chance(hitchance);
968 mpr(bombown, "%s anti-missile system activated...%s\n",
970 hit ? "KABOOOM!! Missile destroyed\n"
971 : "SWOOSH!! anti-missile system failed!!");
972 mpr(ship.shp_own, "Ship #%i anti-missile system activated!\n",
974 mpr(ship.shp_own, "%d%% hitchance...%s\n", hitchance,
975 hit ? "KABOOOM!! Incoming missile destroyed!\n"
976 : "SWOOSH!! Missile evades anti-missile systems\n");
981 return 0; /* all attempts failed */
985 /* Fire missiles at a ship which has fired shells */
987 shp_missdef(struct shpstr *sp, natid victim)
989 struct emp_qelem list;
995 mlp = shp_insque(sp, &list);
996 sprintf(buf, "%s", prship(&mlp->unit.ship));
999 shp_missile_interdiction(&list, sp->shp_x, sp->shp_y, sp->shp_own);
1000 getship(sp->shp_uid, sp);
1004 "missiles launched in defense did 100%% damage to %s\n",
1006 wu(0, victim, "%s sunk!\n", buf);
1007 } else if (eff > 0 && sp->shp_effic < eff) {
1009 "missiles launched in defense did %d%% damage to %s\n",
1010 100 * (eff - sp->shp_effic) / eff, buf);
1017 shp_mobcost(struct shpstr *sp)
1019 return speed_factor(sp->shp_effic * 0.01 * shp_speed(sp),
1024 * Set SP's tech to TLEV along with everything else that depends on it.
1027 shp_set_tech(struct shpstr *sp, int tlev)
1029 struct mchrstr *mcp = mchr + sp->shp_type;
1031 if (CANT_HAPPEN(tlev < mcp->m_tech))
1034 sp->shp_tech = tlev;