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
33 * Markus Armbruster, 2006
57 #include "prototypes.h"
59 static int shp_check_one_mines(struct mlist *);
60 static int shp_hit_mine(struct shpstr *, struct mchrstr *);
61 static void shp_mess(char *, struct mlist *);
64 shp_sel(struct nstr_item *ni, struct emp_qelem *list)
76 while (nxtitem(ni, &ship)) {
79 mcp = &mchr[(int)ship.shp_type];
80 /* if (wantflags && (mcp->m_flags & wantflags) != wantflags)
82 if (nowantflags && mcp->m_flags & nowantflags)
86 if (ontradingblock(EF_SHIP, &ship)) {
87 pr("ship #%d inelligible - it's for sale.\n",
92 /* This abuse is better fixed by building a ship with the normal negative
93 mobility that everything else is built with */
96 if (ship.shp_effic < 21 &&
97 ship.shp_mobil < etu_per_update) {
98 pr("%s needs at least %d mob to navigate.\n",
99 prship(&ship), etu_per_update);
104 ship.shp_mission = 0;
106 memset(ship.shp_rpath, 0, sizeof(ship.shp_rpath));
107 putship(ship.shp_uid, &ship);
108 mlp = malloc(sizeof(struct mlist));
111 mlp->mobil = ship.shp_mobil;
112 emp_insque(&mlp->queue, list);
116 /* This function assumes that the list was created by shp_sel */
118 shp_nav(struct emp_qelem *list, double *minmobp, double *maxmobp,
119 int *togetherp, natid actor)
121 struct emp_qelem *qp;
122 struct emp_qelem *next;
133 for (qp = list->q_back; qp != list; qp = next) {
135 mlp = (struct mlist *)qp;
136 getship(mlp->ship.shp_uid, &ship);
137 if (ship.shp_own != actor) {
138 mpr(actor, "%s was sunk at %s\n",
139 prship(&ship), xyas(ship.shp_x, ship.shp_y, actor));
140 emp_remque((struct emp_qelem *)mlp);
145 if (*ship.shp_path && !update_pending) {
146 shp_mess("has a sail path", mlp);
147 mpr(actor, "Use `sail <#> -' to reset\n");
151 /* check crew - uws don't count */
152 if (ship.shp_item[I_MILIT] == 0 && ship.shp_item[I_CIVIL] == 0) {
153 shp_mess("is crewless", mlp);
156 if (!getsect(ship.shp_x, ship.shp_y, §)) {
157 shp_mess("was sucked into the sky by a strange looking spaceship", mlp); /* heh -KHS */
160 switch (shp_check_nav(§, &ship)) {
161 case CN_CONSTRUCTION:
162 shp_mess("is caught in a construction zone", mlp);
165 shp_mess("is landlocked", mlp);
171 shp_mess("was just swallowed by a big green worm", mlp);
179 if (ship.shp_x != allx || ship.shp_y != ally)
181 if (ship.shp_mobil + 1 < (int)mlp->mobil) {
182 mlp->mobil = ship.shp_mobil;
184 if (mlp->mobil < *minmobp)
185 *minmobp = mlp->mobil;
186 if (mlp->mobil > *maxmobp)
187 *maxmobp = mlp->mobil;
193 shp_put(struct emp_qelem *list, natid actor)
195 struct emp_qelem *qp;
196 struct emp_qelem *newqp;
201 mlp = (struct mlist *)qp;
202 mpr(actor, "%s stopped at %s\n", prship(&mlp->ship),
203 xyas(mlp->ship.shp_x, mlp->ship.shp_y, mlp->ship.shp_own));
204 mlp->ship.shp_mobil = (int)mlp->mobil;
205 putship(mlp->ship.shp_uid, &mlp->ship);
214 shp_sweep(struct emp_qelem *ship_list, int verbose, int takemob, natid actor)
216 struct emp_qelem *qp;
217 struct emp_qelem *next;
220 int mines, m, max, shells;
224 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
226 mlp = (struct mlist *)qp;
227 if (!(mlp->mcp->m_flags & M_SWEEP)) {
229 mpr(actor, "%s doesn't have minesweeping capability!\n",
233 if (takemob && mlp->mobil <= 0.0) {
235 mpr(actor, "%s is out of mobility!\n", prship(&mlp->ship));
238 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
239 if (sect.sct_type != SCT_WATER) {
241 mpr(actor, "%s is not at sea. No mines there!\n",
246 mlp->mobil -= shp_mobcost(&mlp->ship);
247 mlp->ship.shp_mobil = (int)mlp->mobil;
249 putship(mlp->ship.shp_uid, &mlp->ship);
250 if (!(mines = sect.sct_mines))
252 max = mlp->mcp->m_item[I_SHELL];
253 shells = mlp->ship.shp_item[I_SHELL];
254 for (m = 0; mines > 0 && m < 5; m++) {
256 mpr(actor, "Sweep...\n");
258 shells = MIN(max, shells + 1);
259 changed |= map_set(actor, sect.sct_x, sect.sct_y, 'X', 0);
262 sect.sct_mines = mines;
263 mlp->ship.shp_item[I_SHELL] = shells;
264 if (shp_check_one_mines(mlp)) {
269 putship(mlp->ship.shp_uid, &mlp->ship);
278 shp_check_one_mines(struct mlist *mlp)
283 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
284 if (sect.sct_type != SCT_WATER)
288 if (chance(DMINE_HITCHANCE(sect.sct_mines))) {
289 actor = mlp->ship.shp_own;
290 shp_hit_mine(&mlp->ship, mlp->mcp);
292 if (map_set(actor, sect.sct_x, sect.sct_y, 'X', 0))
295 putship(mlp->ship.shp_uid, &mlp->ship);
296 if (!mlp->ship.shp_own)
303 shp_check_mines(struct emp_qelem *ship_list)
305 struct emp_qelem *qp;
306 struct emp_qelem *next;
310 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
312 mlp = (struct mlist *)qp;
313 if (shp_check_one_mines(mlp)) {
323 shp_list(struct emp_qelem *ship_list)
325 struct emp_qelem *qp;
326 struct emp_qelem *next;
330 pr("shp# ship type x,y fl eff mil sh gun pn he xl ln mob tech\n");
332 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
334 mlp = (struct mlist *)qp;
336 pr("%4d ", shp->shp_uid);
337 pr("%-16.16s ", mlp->mcp->m_name);
338 prxy("%4d,%-4d ", shp->shp_x, shp->shp_y, mlp->ship.shp_own);
339 pr("%1.1s", &shp->shp_fleet);
340 pr("%4d%%", shp->shp_effic);
341 pr("%4d", shp->shp_item[I_MILIT]);
342 pr("%4d", shp->shp_item[I_SHELL]);
343 pr("%4d", shp->shp_item[I_GUN]);
345 pr("%3d", shp->shp_nplane);
346 pr("%3d", shp->shp_nchoppers);
347 pr("%3d", shp->shp_nxlight);
349 pr("%3d", shp->shp_nland);
350 pr("%4d", shp->shp_mobil);
351 pr("%4d\n", shp->shp_tech);
356 shp_mess(char *str, struct mlist *mlp)
358 mpr(mlp->ship.shp_own, "%s %s & stays in %s\n",
360 str, xyas(mlp->ship.shp_x, mlp->ship.shp_y, mlp->ship.shp_own));
361 mlp->ship.shp_mobil = (int)mlp->mobil;
362 putship(mlp->ship.shp_uid, &mlp->ship);
363 emp_remque((struct emp_qelem *)mlp);
368 shp_check_nav(struct sctstr *sect, struct shpstr *shp)
370 switch (dchr[sect->sct_type].d_nav) {
374 if (mchr[(int)shp->shp_type].m_flags & M_CANAL) {
375 if (sect->sct_effic < 2)
376 return CN_CONSTRUCTION;
378 return CN_LANDLOCKED;
381 if (sect->sct_effic < 2)
382 return CN_CONSTRUCTION;
385 if (sect->sct_effic < 60)
386 return CN_CONSTRUCTION;
389 return CN_LANDLOCKED;
395 sect_has_dock(struct sctstr *sect)
397 switch (dchr[sect->sct_type].d_nav) {
406 shp_count(struct emp_qelem *list, int wantflags, int nowantflags,
409 struct emp_qelem *qp;
410 struct emp_qelem *next;
414 for (qp = list->q_back; qp != list; qp = next) {
416 mlp = (struct mlist *)qp;
417 if (mlp->ship.shp_x != x || mlp->ship.shp_y != y)
419 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
421 if (nowantflags && mlp->mcp->m_flags & nowantflags)
429 shp_damage_one(struct mlist *mlp, int dam)
431 shipdamage(&mlp->ship, dam);
432 putship(mlp->ship.shp_uid, &mlp->ship);
433 if (!mlp->ship.shp_own) {
434 emp_remque((struct emp_qelem *)mlp);
440 shp_damage(struct emp_qelem *list, int totdam, int wantflags,
441 int nowantflags, int x, int y)
443 struct emp_qelem *qp;
444 struct emp_qelem *next;
450 || !(count = shp_count(list, wantflags, nowantflags, x, y)))
452 dam = ldround((double)totdam / count, 1);
453 for (qp = list->q_back; qp != list; qp = next) {
455 mlp = (struct mlist *)qp;
456 if (mlp->ship.shp_x != x || mlp->ship.shp_y != y)
458 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
460 if (nowantflags && mlp->mcp->m_flags & nowantflags)
462 shp_damage_one(mlp, dam);
468 shp_contains(struct emp_qelem *list, int newx, int newy, int wantflags,
471 struct emp_qelem *qp;
472 struct emp_qelem *next;
475 for (qp = list->q_back; qp != list; qp = next) {
477 mlp = (struct mlist *)qp;
478 /* If the ship isn't in the requested sector, then continue */
479 if (newx != mlp->ship.shp_x || newy != mlp->ship.shp_y)
481 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
483 if (nowantflags && mlp->mcp->m_flags & nowantflags)
490 static struct mlist *
491 most_valuable_ship(struct emp_qelem *list)
493 struct emp_qelem *qp;
494 struct emp_qelem *next;
496 struct mlist *mvs = 0;
498 for (qp = list->q_back; qp != list; qp = next) {
500 mlp = (struct mlist *)qp;
501 if (mlp->mcp->m_flags & M_SUB)
503 if (!mlp->mcp->m_nxlight &&
504 !mlp->mcp->m_nchoppers &&
505 mlp->mcp->m_cost < 1000 &&
506 !mlp->mcp->m_nplanes && !mlp->mcp->m_nland)
512 if (mlp->mcp->m_cost * mlp->ship.shp_effic >
513 mvs->mcp->m_cost * mvs->ship.shp_effic)
520 shp_easiest_target(struct emp_qelem *list, int wantflags, int nowantflags)
522 struct emp_qelem *qp;
523 struct emp_qelem *next;
526 int easiest = 9876; /* things start great for victim */
529 for (qp = list->q_back; qp != list; qp = next) {
531 mlp = (struct mlist *)qp;
532 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
534 if (nowantflags && mlp->mcp->m_flags & nowantflags)
536 hard = shp_hardtarget(&mlp->ship);
538 easiest = hard; /* things get worse for victim */
541 return easiest - count;
545 shp_missile_interdiction(struct emp_qelem *list, coord newx, coord newy,
551 struct emp_qelem msl_list, *qp, *newqp;
555 msl_sel(&msl_list, newx, newy, victim, P_T | P_MAR, 0, MI_INTERDICT);
558 while (!QEMPTY(&msl_list) && (mvs = most_valuable_ship(list))) {
559 sprintf(what, "%s", prship(&mvs->ship));
560 dam = msl_launch_mindam(&msl_list, newx, newy,
561 shp_hardtarget(&mvs->ship),
562 EF_SHIP, 1, what, victim, MI_INTERDICT);
565 "missile interdiction mission does %d damage to %s!\n",
567 shp_damage_one(mvs, dam);
570 } else if (++twotries >= 2) {
574 qp = msl_list.q_forw;
575 while (qp != msl_list.q_forw) {
585 /* Note that this function has a side effect - it uses coastwatch
586 * ranges to see if it should fire upon a ship. So, this function
587 * is expected to return positive if a ship is in range, and 0 if a
588 * ship is not in range. */
590 notify_coastguard(struct emp_qelem *list, int trange, struct sctstr *sectp)
592 struct emp_qelem *qp;
593 struct emp_qelem *next;
598 natp = getnatp(sectp->sct_own);
600 vrange = sectp->sct_type == SCT_RADAR ? 14 : 4;
601 vrange *= tfact(sectp->sct_own, 1.0) * sectp->sct_effic / 100.0;
609 for (qp = list->q_back; qp != list; qp = next) {
611 mlp = (struct mlist *)qp;
612 if (mlp->mcp->m_flags & M_SUB)
614 if (natp->nat_flags & NF_COASTWATCH)
615 wu(0, sectp->sct_own,
616 "%s %s sighted at %s\n",
617 cname(mlp->ship.shp_own),
619 xyas(mlp->ship.shp_x, mlp->ship.shp_y, sectp->sct_own));
621 setcont(sectp->sct_own, mlp->ship.shp_own, FOUND_COAST);
628 shp_fort_interdiction(struct emp_qelem *list, coord newx, coord newy,
638 signed char notified[MAXNOC];
641 /* Inform neutral and worse */
642 for (i = 0; i < MAXNOC; ++i) {
643 if (getrel(getnatp(i), victim) <= NEUTRAL)
649 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
650 while (nxtsct(&ns, &fsect)) {
653 if (fsect.sct_own == victim)
655 if (notified[fsect.sct_own])
657 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
658 if (notify_coastguard(list, trange, &fsect))
659 notified[fsect.sct_own] = 1;
661 if (opt_NO_FORT_FIRE)
662 return 0; /* Only coastwatch notify in nofortfire */
663 /* Only fire at Hostile ships */
664 for (i = 0; i < MAXNOC; ++i) {
665 if (getrel(getnatp(i), victim) >= NEUTRAL)
668 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
669 while (nxtsct(&ns, &fsect)) {
670 if (!notified[fsect.sct_own])
672 gun = fsect.sct_item[I_GUN];
675 range = roundrange(fortrange(&fsect));
676 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
679 if (fsect.sct_item[I_MILIT] < 5)
681 shell = fsect.sct_item[I_SHELL];
683 shell += supply_commod(fsect.sct_own, fsect.sct_x, fsect.sct_y,
688 fsect.sct_item[I_SHELL] = shell;
692 guneff = landgun((int)fsect.sct_effic, gun);
695 mpr(victim, "Incoming fire does %d damage!\n", dam);
697 mpr(victim, "%s fires at you for %d!\n",
698 xyas(fsect.sct_x,fsect.sct_y,victim),
702 "%s fires at %s ships in %s for %d!\n",
703 xyas(fsect.sct_x, fsect.sct_y,
705 cname(victim), xyas(newx, newy, fsect.sct_own), dam);
706 nreport(fsect.sct_own, N_SHP_SHELL, victim, 1);
709 return shp_damage(list, totdam, 0, M_SUB, newx, newy);
714 shp_interdict(struct emp_qelem *list, coord newx, coord newy, natid victim)
718 if (shp_contains(list, newx, newy, 0, M_SUB)) {
719 stopping |= shp_fort_interdiction(list, newx, newy, victim);
721 if (shp_contains(list, newx, newy, 0, M_SUB)) {
724 unit_interdict(newx, newy, victim, "ships",
725 shp_easiest_target(list, 0, M_SUB),
727 0, M_SUB, newx, newy);
728 if (most_valuable_ship(list)) {
730 shp_missile_interdiction(list, newx, newy, victim);
734 if (shp_contains(list, newx, newy, M_SUB, 0)) {
737 unit_interdict(newx, newy, victim, "subs",
738 shp_easiest_target(list, M_SUB, 0),
740 M_SUB, 0, newx, newy);
745 /* high value of hardtarget is harder to hit */
747 shp_hardtarget(struct shpstr *sp)
751 struct mchrstr *mcp = mchr + sp->shp_type;
754 getsect(sp->shp_x, sp->shp_y, §);
755 onsea = sect.sct_type == SCT_WATER;
756 if (mcp->m_flags & M_SUB)
758 return (int)((sp->shp_effic / 100.0) *
759 (20 + sp->shp_speed * onsea / 2.0 - vis));
763 shp_hit_mine(struct shpstr *sp, struct mchrstr *mcp)
767 mpr(sp->shp_own, "Kawhomp! Mine detected in %s!\n",
768 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
770 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
773 if (mcp->m_flags & M_SWEEP)
776 shipdamage(sp, ldround(m, 1));
782 shp_view(struct emp_qelem *list)
785 struct emp_qelem *qp;
786 struct emp_qelem *next;
789 for (qp = list->q_back; qp != list; qp = next) {
791 mlp = (struct mlist *)qp;
792 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
793 if (mlp->mcp->m_flags & M_FOOD)
794 mpr(mlp->ship.shp_own, "[fert:%d] ", sect.sct_fertil);
795 if (mlp->mcp->m_flags & M_OIL)
796 mpr(mlp->ship.shp_own, "[oil:%d] ", sect.sct_oil);
797 mpr(mlp->ship.shp_own, "%s @ %s %d%% %s\n",
799 xyas(mlp->ship.shp_x, mlp->ship.shp_y, player->cnum),
800 sect.sct_effic, dchr[sect.sct_type].d_name);
805 shp_nav_one_sector(struct emp_qelem *list, int dir, natid actor,
809 struct emp_qelem *qp;
810 struct emp_qelem *next;
812 struct emp_qelem done;
819 double tech; /* for mapping */
820 double tf; /* for mapping */
824 if (dir <= DIR_STOP || dir >= DIR_VIEW) {
825 shp_put(list, actor);
830 for (qp = list->q_back; qp != list; qp = next) {
832 mlp = (struct mlist *)qp;
833 newx = xnorm(mlp->ship.shp_x + dx);
834 newy = ynorm(mlp->ship.shp_y + dy);
835 getsect(newx, newy, §);
836 navigate = shp_check_nav(§, &mlp->ship);
837 if (navigate != CN_NAVIGABLE ||
838 (sect.sct_own && actor != sect.sct_own &&
839 getrel(getnatp(sect.sct_own), actor) < FRIENDLY)) {
840 if (dchr[sect.sct_type].d_nav == NAV_CANAL &&
841 !(mlp->mcp->m_flags & M_CANAL) &&
842 navigate == CN_LANDLOCKED)
844 "is too large to fit into the canal system at %s",
845 xyas(newx, newy, actor));
847 sprintf(dp, "can't go to %s", xyas(newx, newy, actor));
849 mpr(actor, "%s\n", dp);
857 if (mlp->mobil <= 0.0) {
858 shp_mess("is out of mobility", mlp);
861 mobcost = shp_mobcost(&mlp->ship);
862 mlp->ship.shp_x = newx;
863 mlp->ship.shp_y = newy;
864 if (mlp->mobil - mobcost < -127) {
867 mlp->mobil -= mobcost;
869 mlp->ship.shp_mobil = (int)mlp->mobil;
870 putship(mlp->ship.shp_uid, &mlp->ship);
872 /* Now update the map for this ship */
873 tech = techfact(mlp->ship.shp_tech, mlp->mcp->m_vrnge);
874 if (mlp->mcp->m_flags & M_SONAR)
875 tf = techfact(mlp->ship.shp_tech, 1.0);
878 radmapupd(mlp->ship.shp_own, mlp->ship.shp_x, mlp->ship.shp_y,
879 (int)mlp->ship.shp_effic, (int)tech, tf);
883 stopping |= shp_sweep(list, 0, 0, actor);
886 stopping |= shp_check_mines(list);
890 /* interdict ships sector by sector */
892 while (!QEMPTY(list)) {
893 mlp = (struct mlist *)list->q_back;
894 newx = mlp->ship.shp_x;
895 newy = mlp->ship.shp_y;
896 stopping |= shp_interdict(list, newx, newy, actor);
897 /* move survivors in this sector to done */
898 for (qp = list->q_back; qp != list; qp = next) {
900 mlp = (struct mlist *)qp;
901 if (mlp->ship.shp_x == newx && mlp->ship.shp_y == newy) {
903 emp_insque(qp, &done);
907 /* assign surviving ships back to list */
908 emp_insque(list, &done);
916 * Check for incoming missiles with a P_MAR flag.
917 * Return True=1 if the missile was shotdown.
920 * Chad Zabel, July 95
924 shp_missile_defense(coord dx, coord dy, natid bombown, int hardtarget)
930 double gun, eff, teff;
932 snxtitem_dist(&ni, EF_SHIP, dx, dy, 1);
934 while (nxtitem(&ni, &ship)) {
938 if (!(mchr[(int)ship.shp_type].m_flags & M_ANTIMISSILE))
941 if (getrel(getnatp(ship.shp_own), bombown) >= NEUTRAL)
944 if (ship.shp_effic < 60)
947 shell = ship.shp_item[I_SHELL];
948 if (ship.shp_item[I_MILIT] < 1) /* do we have mil? */
950 if (shell < 2) { /* do we need shells */
951 shell += supply_commod(ship.shp_own, ship.shp_x, ship.shp_y,
956 if (ship.shp_item[I_GUN] < 1) /* we need at least 1 gun */
959 /* now calculate the odds */
960 gun = MIN(ship.shp_item[I_GUN], ship.shp_glim);
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;
970 mpr(bombown, "%s anti-missile system activated...",
971 cname(ship.shp_own));
972 mpr(ship.shp_own, "Ship #%i anti-missile system activated!\n",
974 mpr(ship.shp_own, "%d%% hitchance...", hitchance);
976 ship.shp_item[I_SHELL] = shell - 2;
977 putship(ship.shp_uid, &ship);
979 if (roll(100) <= hitchance) {
980 mpr(bombown, "KABOOOM!! Missile destroyed\n\n");
982 "KABOOOM!! Incoming missile destroyed!\n\n");
985 mpr(bombown, "SWOOSH!! anti-missile system failed!!\n");
987 "SWOOSH!! Missile evades anti-missile systems\n\n");
990 return 0; /* all attempts failed */
994 shp_path(int together, struct shpstr *shp, char *buf)
998 struct sctstr d_sect;
1001 if (!sarg_xy(buf, &destx, &desty))
1005 "Cannot go to a destination sector if not all starting in the same sector\n");
1008 if (!getsect(destx, desty, &d_sect)) {
1009 mpr(shp->shp_own, "%d,%d is not a sector\n", destx, desty);
1013 cp = BestShipPath(buf, shp->shp_x, shp->shp_y,
1014 d_sect.sct_x, d_sect.sct_y, player->cnum);
1015 if (!cp || shp->shp_mobil <= 0) {
1016 mpr(shp->shp_own, "Can't get to '%s' right now.\n",
1017 xyas(d_sect.sct_x, d_sect.sct_y, player->cnum));
1023 /* Fire missiles at a ship which has fired shells */
1025 shp_missdef(struct shpstr *sp, natid victim)
1027 struct emp_qelem list;
1034 mlp = malloc(sizeof(struct mlist));
1035 mlp->mcp = &mchr[(int)sp->shp_type];
1037 mlp->mobil = sp->shp_mobil;
1038 emp_insque(&mlp->queue, &list);
1039 sprintf(buf, "%s", prship(&mlp->ship));
1041 eff = sp->shp_effic;
1042 if (most_valuable_ship(&list)) {
1043 shp_missile_interdiction(&list, sp->shp_x, sp->shp_y, sp->shp_own);
1044 getship(sp->shp_uid, sp);
1048 "missiles launched in defense did 100%% damage to %s\n",
1050 wu(0, victim, "%s sunk!\n", buf);
1051 } else if (eff > 0 && sp->shp_effic < eff) {
1053 "missiles launched in defense did %d%% damage to %s\n",
1054 100 * (eff - sp->shp_effic) / eff, buf);
1062 shp_mobcost(struct shpstr *sp)
1064 return speed_factor(sp->shp_effic * 0.01 * sp->shp_speed,
1069 * Set SP's tech to TLEV along with everything else that depends on it.
1072 shp_set_tech(struct shpstr *sp, int tlev)
1074 struct mchrstr *mcp = mchr + sp->shp_type;
1075 int tech_diff = tlev - mcp->m_tech;
1077 if (CANT_HAPPEN(tech_diff < 0)) {
1082 sp->shp_tech = tlev;
1083 sp->shp_armor = (short)SHP_DEF(mcp->m_armor, tech_diff);
1084 sp->shp_speed = (short)SHP_SPD(mcp->m_speed, tech_diff);
1085 sp->shp_visib = (short)SHP_VIS(mcp->m_visib, tech_diff);
1086 sp->shp_frnge = (short)SHP_RNG(mcp->m_frnge, tech_diff);
1087 sp->shp_glim = (short)SHP_FIR(mcp->m_glim, tech_diff);