2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program 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 2 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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * shpsub.c: Ship subroutine stuff
30 * Known contributors to this file:
32 * Steve McClure, 1996-2000
56 #include "prototypes.h"
58 static int shp_check_one_mines(struct mlist *);
59 static int shp_hit_mine(struct shpstr *, struct mchrstr *);
60 static void shp_mess(char *, struct mlist *);
63 shp_sel(struct nstr_item *ni, struct emp_qelem *list)
75 while (nxtitem(ni, &ship)) {
78 mcp = &mchr[(int)ship.shp_type];
79 /* if (wantflags && (mcp->m_flags & wantflags) != wantflags)
81 if (nowantflags && mcp->m_flags & nowantflags)
85 if (ontradingblock(EF_SHIP, &ship)) {
86 pr("ship #%d inelligible - it's for sale.\n",
91 /* This abuse is better fixed by building a ship with the normal negative
92 mobility that everything else is built with */
95 if (ship.shp_effic < 21 &&
96 ship.shp_mobil < etu_per_update) {
97 pr("%s needs at least %d mob to navigate.\n",
98 prship(&ship), etu_per_update);
103 ship.shp_mission = 0;
105 memset(ship.shp_rpath, 0, sizeof(ship.shp_rpath));
106 putship(ship.shp_uid, &ship);
107 mlp = malloc(sizeof(struct mlist));
110 mlp->mobil = ship.shp_mobil;
111 emp_insque(&mlp->queue, list);
115 /* This function assumes that the list was created by shp_sel */
117 shp_nav(struct emp_qelem *list, double *minmobp, double *maxmobp,
118 int *togetherp, natid actor)
120 struct emp_qelem *qp;
121 struct emp_qelem *next;
132 for (qp = list->q_back; qp != list; qp = next) {
134 mlp = (struct mlist *)qp;
135 getship(mlp->ship.shp_uid, &ship);
136 if (ship.shp_own != actor) {
137 mpr(actor, "%s was sunk at %s\n",
138 prship(&ship), xyas(ship.shp_x, ship.shp_y, actor));
139 emp_remque((struct emp_qelem *)mlp);
144 if (*ship.shp_path && !update_pending) {
145 shp_mess("has a sail path", mlp);
146 mpr(actor, "Use `sail <#> -' to reset\n");
150 /* check crew - uws don't count */
151 if (ship.shp_item[I_MILIT] == 0 && ship.shp_item[I_CIVIL] == 0) {
152 shp_mess("is crewless", mlp);
155 if (!getsect(ship.shp_x, ship.shp_y, §)) {
156 shp_mess("was sucked into the sky by a strange looking spaceship", mlp); /* heh -KHS */
159 switch (shp_check_nav(§, &ship)) {
160 case CN_CONSTRUCTION:
161 shp_mess("is caught in a construction zone", mlp);
164 shp_mess("is landlocked", mlp);
170 shp_mess("was just swallowed by a big green worm", mlp);
178 if (ship.shp_x != allx || ship.shp_y != ally)
180 if (ship.shp_mobil + 1 < (int)mlp->mobil) {
181 mlp->mobil = ship.shp_mobil;
183 if (mlp->mobil < *minmobp)
184 *minmobp = mlp->mobil;
185 if (mlp->mobil > *maxmobp)
186 *maxmobp = mlp->mobil;
192 shp_put(struct emp_qelem *list, natid actor)
194 struct emp_qelem *qp;
195 struct emp_qelem *newqp;
200 mlp = (struct mlist *)qp;
201 mpr(actor, "%s stopped at %s\n", prship(&mlp->ship),
202 xyas(mlp->ship.shp_x, mlp->ship.shp_y, mlp->ship.shp_own));
203 mlp->ship.shp_mobil = (int)mlp->mobil;
204 putship(mlp->ship.shp_uid, &mlp->ship);
213 shp_sweep(struct emp_qelem *ship_list, int verbose, int takemob, natid actor)
215 struct emp_qelem *qp;
216 struct emp_qelem *next;
219 int mines, m, max, shells;
223 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
225 mlp = (struct mlist *)qp;
226 if (!(mlp->mcp->m_flags & M_SWEEP)) {
228 mpr(actor, "%s doesn't have minesweeping capability!\n",
232 if (takemob && mlp->mobil <= 0.0) {
234 mpr(actor, "%s is out of mobility!\n", prship(&mlp->ship));
237 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
238 if (sect.sct_type != SCT_WATER) {
240 mpr(actor, "%s is not at sea. No mines there!\n",
245 mlp->mobil -= shp_mobcost(&mlp->ship);
246 mlp->ship.shp_mobil = (int)mlp->mobil;
248 putship(mlp->ship.shp_uid, &mlp->ship);
249 if (!(mines = sect.sct_mines))
251 max = mlp->mcp->m_item[I_SHELL];
252 shells = mlp->ship.shp_item[I_SHELL];
253 for (m = 0; mines > 0 && m < 5; m++) {
255 mpr(actor, "Sweep...\n");
257 shells = MIN(max, shells + 1);
258 changed |= map_set(actor, sect.sct_x, sect.sct_y, 'X', 0);
261 sect.sct_mines = mines;
262 mlp->ship.shp_item[I_SHELL] = shells;
263 if (shp_check_one_mines(mlp)) {
268 putship(mlp->ship.shp_uid, &mlp->ship);
277 shp_check_one_mines(struct mlist *mlp)
282 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
283 if (sect.sct_type != SCT_WATER)
287 if (chance(DMINE_HITCHANCE(sect.sct_mines))) {
288 actor = mlp->ship.shp_own;
289 shp_hit_mine(&mlp->ship, mlp->mcp);
291 if (map_set(actor, sect.sct_x, sect.sct_y, 'X', 0))
294 putship(mlp->ship.shp_uid, &mlp->ship);
295 if (!mlp->ship.shp_own)
302 shp_check_mines(struct emp_qelem *ship_list)
304 struct emp_qelem *qp;
305 struct emp_qelem *next;
309 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
311 mlp = (struct mlist *)qp;
312 if (shp_check_one_mines(mlp)) {
322 shp_list(struct emp_qelem *ship_list)
324 struct emp_qelem *qp;
325 struct emp_qelem *next;
329 pr("shp# ship type x,y fl eff mil sh gun pn he xl ln mob tech\n");
331 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
333 mlp = (struct mlist *)qp;
335 pr("%4d ", shp->shp_uid);
336 pr("%-16.16s ", mlp->mcp->m_name);
337 prxy("%4d,%-4d ", shp->shp_x, shp->shp_y, mlp->ship.shp_own);
338 pr("%1.1s", &shp->shp_fleet);
339 pr("%4d%%", shp->shp_effic);
340 pr("%4d", shp->shp_item[I_MILIT]);
341 pr("%4d", shp->shp_item[I_SHELL]);
342 pr("%4d", shp->shp_item[I_GUN]);
344 pr("%3d", shp->shp_nplane);
345 pr("%3d", shp->shp_nchoppers);
346 pr("%3d", shp->shp_nxlight);
348 pr("%3d", shp->shp_nland);
349 pr("%4d", shp->shp_mobil);
350 pr("%4d\n", shp->shp_tech);
355 shp_mess(char *str, struct mlist *mlp)
357 mpr(mlp->ship.shp_own, "%s %s & stays in %s\n",
359 str, xyas(mlp->ship.shp_x, mlp->ship.shp_y, mlp->ship.shp_own));
360 mlp->ship.shp_mobil = (int)mlp->mobil;
361 putship(mlp->ship.shp_uid, &mlp->ship);
362 emp_remque((struct emp_qelem *)mlp);
367 shp_check_nav(struct sctstr *sect, struct shpstr *shp)
369 switch (dchr[sect->sct_type].d_nav) {
373 if (mchr[(int)shp->shp_type].m_flags & M_CANAL) {
374 if (sect->sct_effic < 2)
375 return CN_CONSTRUCTION;
377 return CN_LANDLOCKED;
380 if (sect->sct_effic < 2)
381 return CN_CONSTRUCTION;
384 if (sect->sct_effic < 60)
385 return CN_CONSTRUCTION;
388 return CN_LANDLOCKED;
394 sect_has_dock(struct sctstr *sect)
396 switch (dchr[sect->sct_type].d_nav) {
405 shp_count(struct emp_qelem *list, int wantflags, int nowantflags,
408 struct emp_qelem *qp;
409 struct emp_qelem *next;
413 for (qp = list->q_back; qp != list; qp = next) {
415 mlp = (struct mlist *)qp;
416 if (mlp->ship.shp_x != x || mlp->ship.shp_y != y)
418 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
420 if (nowantflags && mlp->mcp->m_flags & nowantflags)
428 shp_damage_one(struct mlist *mlp, int dam)
430 shipdamage(&mlp->ship, dam);
431 putship(mlp->ship.shp_uid, &mlp->ship);
432 if (!mlp->ship.shp_own) {
433 emp_remque((struct emp_qelem *)mlp);
439 shp_damage(struct emp_qelem *list, int totdam, int wantflags,
440 int nowantflags, int x, int y)
442 struct emp_qelem *qp;
443 struct emp_qelem *next;
449 || !(count = shp_count(list, wantflags, nowantflags, x, y)))
451 dam = ldround((double)totdam / count, 1);
452 for (qp = list->q_back; qp != list; qp = next) {
454 mlp = (struct mlist *)qp;
455 if (mlp->ship.shp_x != x || mlp->ship.shp_y != y)
457 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
459 if (nowantflags && mlp->mcp->m_flags & nowantflags)
461 shp_damage_one(mlp, dam);
467 shp_contains(struct emp_qelem *list, int newx, int newy, int wantflags,
470 struct emp_qelem *qp;
471 struct emp_qelem *next;
474 for (qp = list->q_back; qp != list; qp = next) {
476 mlp = (struct mlist *)qp;
477 /* If the ship isn't in the requested sector, then continue */
478 if (newx != mlp->ship.shp_x || newy != mlp->ship.shp_y)
480 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
482 if (nowantflags && mlp->mcp->m_flags & nowantflags)
489 static struct mlist *
490 most_valuable_ship(struct emp_qelem *list)
492 struct emp_qelem *qp;
493 struct emp_qelem *next;
495 struct mlist *mvs = 0;
497 for (qp = list->q_back; qp != list; qp = next) {
499 mlp = (struct mlist *)qp;
500 if (mlp->mcp->m_flags & M_SUB)
502 if (!mlp->mcp->m_nxlight &&
503 !mlp->mcp->m_nchoppers &&
504 mlp->mcp->m_cost < 1000 &&
505 !mlp->mcp->m_nplanes && !mlp->mcp->m_nland)
511 if (mlp->mcp->m_cost * mlp->ship.shp_effic >
512 mvs->mcp->m_cost * mvs->ship.shp_effic)
519 shp_easiest_target(struct emp_qelem *list, int wantflags, int nowantflags)
521 struct emp_qelem *qp;
522 struct emp_qelem *next;
525 int easiest = 9876; /* things start great for victim */
528 for (qp = list->q_back; qp != list; qp = next) {
530 mlp = (struct mlist *)qp;
531 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
533 if (nowantflags && mlp->mcp->m_flags & nowantflags)
535 hard = shp_hardtarget(&mlp->ship);
537 easiest = hard; /* things get worse for victim */
540 return easiest - count;
544 shp_missile_interdiction(struct emp_qelem *list, coord newx, coord newy,
550 struct emp_qelem msl_list, *qp, *newqp;
554 msl_sel(&msl_list, newx, newy, victim, P_T | P_MAR, 0, MI_INTERDICT);
557 while (!QEMPTY(&msl_list) && (mvs = most_valuable_ship(list))) {
558 sprintf(what, "%s", prship(&mvs->ship));
559 dam = msl_launch_mindam(&msl_list, newx, newy,
560 shp_hardtarget(&mvs->ship),
561 EF_SHIP, 1, what, victim, MI_INTERDICT);
564 "missile interdiction mission does %d damage to %s!\n",
566 shp_damage_one(mvs, dam);
569 } else if (++twotries >= 2) {
573 qp = msl_list.q_forw;
574 while (qp != msl_list.q_forw) {
584 /* Note that this function has a side effect - it uses coastwatch
585 * ranges to see if it should fire upon a ship. So, this function
586 * is expected to return positive if a ship is in range, and 0 if a
587 * ship is not in range. */
589 notify_coastguard(struct emp_qelem *list, int trange, struct sctstr *sectp)
591 struct emp_qelem *qp;
592 struct emp_qelem *next;
597 natp = getnatp(sectp->sct_own);
599 vrange = sectp->sct_type == SCT_RADAR ? 14 : 4;
600 vrange *= tfact(sectp->sct_own, 1.0) * sectp->sct_effic / 100.0;
608 for (qp = list->q_back; qp != list; qp = next) {
610 mlp = (struct mlist *)qp;
611 if (mlp->mcp->m_flags & M_SUB)
613 if (natp->nat_flags & NF_COASTWATCH)
614 wu(0, sectp->sct_own,
615 "%s %s sighted at %s\n",
616 cname(mlp->ship.shp_own),
618 xyas(mlp->ship.shp_x, mlp->ship.shp_y, sectp->sct_own));
620 setcont(sectp->sct_own, mlp->ship.shp_own, FOUND_COAST);
627 shp_fort_interdiction(struct emp_qelem *list, coord newx, coord newy,
637 signed char notified[MAXNOC];
640 /* Inform neutral and worse */
641 for (i = 0; i < MAXNOC; ++i) {
642 if (getrel(getnatp(i), victim) <= NEUTRAL)
648 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
649 while (nxtsct(&ns, &fsect)) {
652 if (fsect.sct_own == victim)
654 if (notified[fsect.sct_own])
656 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
657 if (notify_coastguard(list, trange, &fsect))
658 notified[fsect.sct_own] = 1;
660 if (opt_NO_FORT_FIRE)
661 return 0; /* Only coastwatch notify in nofortfire */
662 /* Only fire at Hostile ships */
663 for (i = 0; i < MAXNOC; ++i) {
664 if (getrel(getnatp(i), victim) >= NEUTRAL)
667 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
668 while (nxtsct(&ns, &fsect)) {
669 if (!notified[fsect.sct_own])
671 gun = fsect.sct_item[I_GUN];
674 range = roundrange(fortrange(&fsect));
675 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
678 if (fsect.sct_item[I_MILIT] < 5)
680 shell = fsect.sct_item[I_SHELL];
682 shell += supply_commod(fsect.sct_own, fsect.sct_x, fsect.sct_y,
687 fsect.sct_item[I_SHELL] = shell;
691 guneff = landgun((int)fsect.sct_effic, gun);
694 mpr(victim, "Incoming fire does %d damage!\n", dam);
696 mpr(victim, "%s fires at you for %d!\n",
697 xyas(fsect.sct_x,fsect.sct_y,victim),
701 "%s fires at %s ships in %s for %d!\n",
702 xyas(fsect.sct_x, fsect.sct_y,
704 cname(victim), xyas(newx, newy, fsect.sct_own), dam);
705 nreport(fsect.sct_own, N_SHP_SHELL, victim, 1);
708 return shp_damage(list, totdam, 0, M_SUB, newx, newy);
713 shp_interdict(struct emp_qelem *list, coord newx, coord newy, natid victim)
717 if (shp_contains(list, newx, newy, 0, M_SUB)) {
718 stopping |= shp_fort_interdiction(list, newx, newy, victim);
720 if (shp_contains(list, newx, newy, 0, M_SUB)) {
723 unit_interdict(newx, newy, victim, "ships",
724 shp_easiest_target(list, 0, M_SUB),
726 0, M_SUB, newx, newy);
727 if (most_valuable_ship(list)) {
729 shp_missile_interdiction(list, newx, newy, victim);
733 if (shp_contains(list, newx, newy, M_SUB, 0)) {
736 unit_interdict(newx, newy, victim, "subs",
737 shp_easiest_target(list, M_SUB, 0),
739 M_SUB, 0, newx, newy);
744 /* high value of hardtarget is harder to hit */
746 shp_hardtarget(struct shpstr *sp)
750 struct mchrstr *mcp = mchr + sp->shp_type;
753 getsect(sp->shp_x, sp->shp_y, §);
754 onsea = sect.sct_type == SCT_WATER;
755 if (mcp->m_flags & M_SUB)
757 return (int)((sp->shp_effic / 100.0) *
758 (20 + sp->shp_speed * onsea / 2.0 - vis));
762 shp_hit_mine(struct shpstr *sp, struct mchrstr *mcp)
766 mpr(sp->shp_own, "Kawhomp! Mine detected in %s!\n",
767 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
769 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
772 if (mcp->m_flags & M_SWEEP)
775 shipdamage(sp, ldround(m, 1));
781 shp_view(struct emp_qelem *list)
784 struct emp_qelem *qp;
785 struct emp_qelem *next;
788 for (qp = list->q_back; qp != list; qp = next) {
790 mlp = (struct mlist *)qp;
791 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
792 if (mlp->mcp->m_flags & M_FOOD)
793 mpr(mlp->ship.shp_own, "[fert:%d] ", sect.sct_fertil);
794 if (mlp->mcp->m_flags & M_OIL)
795 mpr(mlp->ship.shp_own, "[oil:%d] ", sect.sct_oil);
796 mpr(mlp->ship.shp_own, "%s @ %s %d%% %s\n",
798 xyas(mlp->ship.shp_x, mlp->ship.shp_y, player->cnum),
799 sect.sct_effic, dchr[sect.sct_type].d_name);
804 shp_nav_one_sector(struct emp_qelem *list, int dir, natid actor,
808 struct emp_qelem *qp;
809 struct emp_qelem *next;
811 struct emp_qelem done;
818 double tech; /* for mapping */
819 double tf; /* for mapping */
823 if (dir <= DIR_STOP || dir >= DIR_VIEW) {
824 shp_put(list, actor);
829 for (qp = list->q_back; qp != list; qp = next) {
831 mlp = (struct mlist *)qp;
832 newx = xnorm(mlp->ship.shp_x + dx);
833 newy = ynorm(mlp->ship.shp_y + dy);
834 getsect(newx, newy, §);
835 navigate = shp_check_nav(§, &mlp->ship);
836 if (navigate != CN_NAVIGABLE ||
837 (sect.sct_own && actor != sect.sct_own &&
838 getrel(getnatp(sect.sct_own), actor) < FRIENDLY)) {
839 if (dchr[sect.sct_type].d_nav == NAV_CANAL &&
840 !(mlp->mcp->m_flags & M_CANAL) &&
841 navigate == CN_LANDLOCKED)
843 "is too large to fit into the canal system at %s",
844 xyas(newx, newy, actor));
846 sprintf(dp, "can't go to %s", xyas(newx, newy, actor));
848 mpr(actor, "%s\n", dp);
856 if (mlp->mobil <= 0.0) {
857 shp_mess("is out of mobility", mlp);
860 mobcost = shp_mobcost(&mlp->ship);
861 mlp->ship.shp_x = newx;
862 mlp->ship.shp_y = newy;
863 if (mlp->mobil - mobcost < -127) {
866 mlp->mobil -= mobcost;
868 mlp->ship.shp_mobil = (int)mlp->mobil;
869 putship(mlp->ship.shp_uid, &mlp->ship);
871 /* Now update the map for this ship */
872 tech = techfact(mlp->ship.shp_tech, mlp->mcp->m_vrnge);
873 if (mlp->mcp->m_flags & M_SONAR)
874 tf = techfact(mlp->ship.shp_tech, 1.0);
877 radmapupd(mlp->ship.shp_own, mlp->ship.shp_x, mlp->ship.shp_y,
878 (int)mlp->ship.shp_effic, (int)tech, tf);
882 stopping |= shp_sweep(list, 0, 0, actor);
885 stopping |= shp_check_mines(list);
889 /* interdict ships sector by sector */
891 while (!QEMPTY(list)) {
892 mlp = (struct mlist *)list->q_back;
893 newx = mlp->ship.shp_x;
894 newy = mlp->ship.shp_y;
895 stopping |= shp_interdict(list, newx, newy, actor);
896 /* move survivors in this sector to done */
897 for (qp = list->q_back; qp != list; qp = next) {
899 mlp = (struct mlist *)qp;
900 if (mlp->ship.shp_x == newx && mlp->ship.shp_y == newy) {
902 emp_insque(qp, &done);
906 /* assign surviving ships back to list */
907 emp_insque(list, &done);
915 * Check for incoming missiles with a P_MAR flag.
916 * Return True=1 if the missile was shotdown.
919 * Chad Zabel, July 95
923 shp_missile_defense(coord dx, coord dy, natid bombown, int hardtarget)
929 double gun, eff, teff;
931 snxtitem_dist(&ni, EF_SHIP, dx, dy, 1);
933 while (nxtitem(&ni, &ship)) {
937 if (!(mchr[(int)ship.shp_type].m_flags & M_ANTIMISSILE))
940 if (getrel(getnatp(ship.shp_own), bombown) >= NEUTRAL)
943 if (ship.shp_effic < 60)
946 shell = ship.shp_item[I_SHELL];
947 if (ship.shp_item[I_MILIT] < 1) /* do we have mil? */
949 if (shell < 2) { /* do we need shells */
950 shell += supply_commod(ship.shp_own, ship.shp_x, ship.shp_y,
955 if (ship.shp_item[I_GUN] < 1) /* we need at least 1 gun */
958 /* now calculate the odds */
959 gun = MIN(ship.shp_item[I_GUN], ship.shp_glim);
960 eff = ship.shp_effic / 100.0;
961 teff = ship.shp_tech / (ship.shp_tech + 200.0);
962 /* raise 4.5 for better interception -KHS */
963 hitchance = (int)(gun * eff * teff * 4.5) - hardtarget;
969 mpr(bombown, "%s anti-missile system activated...",
970 cname(ship.shp_own));
971 mpr(ship.shp_own, "Ship #%i anti-missile system activated!\n",
973 mpr(ship.shp_own, "%d%% hitchance...", hitchance);
975 ship.shp_item[I_SHELL] = shell - 2;
976 putship(ship.shp_uid, &ship);
978 if (roll(100) <= hitchance) {
979 mpr(bombown, "KABOOOM!! Missile destroyed\n\n");
981 "KABOOOM!! Incoming missile destroyed!\n\n");
984 mpr(bombown, "SWOOSH!! anti-missile system failed!!\n");
986 "SWOOSH!! Missile evades anti-missile systems\n\n");
989 return 0; /* all attempts failed */
993 shp_path(int together, struct shpstr *shp, char *buf)
997 struct sctstr d_sect;
1000 if (!sarg_xy(buf, &destx, &desty))
1004 "Cannot go to a destination sector if not all starting in the same sector\n");
1007 if (!getsect(destx, desty, &d_sect)) {
1008 mpr(shp->shp_own, "%d,%d is not a sector\n", destx, desty);
1012 cp = BestShipPath(buf, shp->shp_x, shp->shp_y,
1013 d_sect.sct_x, d_sect.sct_y, player->cnum);
1014 if (!cp || shp->shp_mobil <= 0) {
1015 mpr(shp->shp_own, "Can't get to '%s' right now.\n",
1016 xyas(d_sect.sct_x, d_sect.sct_y, player->cnum));
1022 /* Fire missiles at a ship which has fired shells */
1024 shp_missdef(struct shpstr *sp, natid victim)
1026 struct emp_qelem list;
1033 mlp = malloc(sizeof(struct mlist));
1034 mlp->mcp = &mchr[(int)sp->shp_type];
1036 mlp->mobil = sp->shp_mobil;
1037 emp_insque(&mlp->queue, &list);
1038 sprintf(buf, "%s", prship(&mlp->ship));
1040 eff = sp->shp_effic;
1041 if (most_valuable_ship(&list)) {
1042 shp_missile_interdiction(&list, sp->shp_x, sp->shp_y, sp->shp_own);
1043 getship(sp->shp_uid, sp);
1047 "missiles launched in defense did 100%% damage to %s\n",
1049 wu(0, victim, "%s sunk!\n", buf);
1050 } else if (eff > 0 && sp->shp_effic < eff) {
1052 "missiles launched in defense did %d%% damage to %s\n",
1053 100 * (eff - sp->shp_effic) / eff, buf);
1061 shp_mobcost(struct shpstr *sp)
1063 return speed_factor(sp->shp_effic * 0.01 * sp->shp_speed,
1068 * Set SP's tech to TLEV along with everything else that depends on it.
1071 shp_set_tech(struct shpstr *sp, int tlev)
1073 struct mchrstr *mcp = mchr + sp->shp_type;
1074 int tech_diff = tlev - mcp->m_tech;
1076 if (CANT_HAPPEN(tech_diff < 0)) {
1081 sp->shp_tech = tlev;
1082 sp->shp_armor = (short)SHP_DEF(mcp->m_armor, tech_diff);
1083 sp->shp_speed = (short)SHP_SPD(mcp->m_speed, tech_diff);
1084 sp->shp_visib = (short)SHP_VIS(mcp->m_visib, tech_diff);
1085 sp->shp_frnge = (short)SHP_RNG(mcp->m_frnge, tech_diff);
1086 sp->shp_glim = (short)SHP_FIR(mcp->m_glim, tech_diff);