2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-1999, 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 the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * 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
54 #include "prototypes.h"
56 static int shp_check_nav(struct sctstr *);
57 static int shp_check_one_mines(struct mlist *);
58 static int shp_hit_mine(struct shpstr *, struct mchrstr *);
59 static void shp_mess(s_char *, struct mlist *);
62 shp_sel(struct nstr_item *ni, struct emp_qelem *list)
74 while (nxtitem(ni, (s_char *)&ship)) {
77 mcp = &mchr[(int)ship.shp_type];
78 /* if (wantflags && (mcp->m_flags & wantflags) != wantflags)
80 if (nowantflags && mcp->m_flags & nowantflags)
84 if (ontradingblock(EF_SHIP, (int *)&ship)) {
85 pr("ship #%d inelligible - it's for sale.\n",
90 /* This abuse is better fixed by building a ship with the normal negative
91 mobility that everything else is built with */
94 if (ship.shp_effic < 21 &&
95 ship.shp_mobil < etu_per_update) {
96 pr("%s needs at least %d mob to navigate.\n",
97 prship(&ship), etu_per_update);
102 ship.shp_mission = 0;
104 memset(ship.shp_rpath, 0, sizeof(ship.shp_rpath));
105 putship(ship.shp_uid, &ship);
106 mlp = (struct mlist *)malloc(sizeof(struct mlist));
109 mlp->mobil = (double)ship.shp_mobil;
110 emp_insque(&mlp->queue, list);
114 /* This function assumes that the list was created by shp_sel */
116 shp_nav(struct emp_qelem *list, double *minmobp, double *maxmobp,
117 int *togetherp, natid actor)
119 struct emp_qelem *qp;
120 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 getvec(VT_ITEM, vec, (s_char *)&ship, EF_SHIP);
152 if (vec[I_MILIT] == 0 && vec[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(§)) {
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 = (double)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 register struct emp_qelem *qp;
196 register 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, natid actor)
216 struct emp_qelem *qp;
217 struct emp_qelem *next;
220 int mines, m, max, shells;
225 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
227 mlp = (struct mlist *)qp;
228 if (!(mlp->mcp->m_flags & M_SWEEP)) {
230 mpr(actor, "%s doesn't have minesweeping capability!\n",
234 if (mlp->mobil <= 0.0) {
236 mpr(actor, "%s is out of mobility!\n", prship(&mlp->ship));
239 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
240 if (sect.sct_type != SCT_WATER) {
242 mpr(actor, "%s is not at sea. No mines there!\n",
246 mobcost = mlp->ship.shp_effic * 0.01 * mlp->ship.shp_speed;
247 mobcost = 480.0 / (mobcost +
248 techfact(mlp->ship.shp_tech, mobcost));
249 mlp->mobil -= mobcost;
250 mlp->ship.shp_mobil = (int)mlp->mobil;
251 putship(mlp->ship.shp_uid, &mlp->ship);
252 if (!(mines = sect.sct_mines))
254 max = vl_find(V_SHELL, mlp->mcp->m_vtype,
255 mlp->mcp->m_vamt, (int)mlp->mcp->m_nv);
256 shells = mlp->ship.shp_item[I_SHELL];
257 for (m = 0; mines > 0 && m < 5; m++) {
259 mpr(actor, "Sweep...\n");
261 shells = min(max, shells + 1);
262 changed |= map_set(actor, sect.sct_x, sect.sct_y, 'X', 0);
265 sect.sct_mines = mines;
266 mlp->ship.shp_item[I_SHELL] = shells;
267 if (shp_check_one_mines(mlp)) {
272 putship(mlp->ship.shp_uid, &mlp->ship);
281 shp_check_one_mines(struct mlist *mlp)
287 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
288 if (sect.sct_type != SCT_WATER)
292 if (chance(DMINE_HITCHANCE(sect.sct_mines))) {
293 actor = mlp->ship.shp_own;
294 shp_hit_mine(&mlp->ship, mlp->mcp);
296 changed |= map_set(actor, sect.sct_x, sect.sct_y, 'X', 0);
300 putship(mlp->ship.shp_uid, (s_char *)&mlp->ship);
301 if (!mlp->ship.shp_own)
308 shp_check_mines(struct emp_qelem *ship_list)
310 struct emp_qelem *qp;
311 struct emp_qelem *next;
315 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
317 mlp = (struct mlist *)qp;
318 if (shp_check_one_mines(mlp)) {
328 shp_list(struct emp_qelem *ship_list)
330 struct emp_qelem *qp;
331 struct emp_qelem *next;
336 pr("shp# ship type x,y fl eff mil sh gun pn he xl ln mob tech\n");
338 for (qp = ship_list->q_back; qp != ship_list; qp = next) {
340 mlp = (struct mlist *)qp;
342 pr("%4d ", shp->shp_uid);
343 pr("%-16.16s ", mlp->mcp->m_name);
344 prxy("%4d,%-4d ", shp->shp_x, shp->shp_y, mlp->ship.shp_own);
345 pr("%1c", shp->shp_fleet);
346 pr("%4d%%", shp->shp_effic);
347 getvec(VT_ITEM, vec, (s_char *)shp, EF_SHIP);
348 pr("%4d", vec[I_MILIT]);
349 pr("%4d", vec[I_SHELL]);
350 pr("%4d", vec[I_GUN]);
352 pr("%3d", shp->shp_nplane);
353 pr("%3d", shp->shp_nchoppers);
354 pr("%3d", shp->shp_nxlight);
356 pr("%3d", shp->shp_nland);
357 pr("%4d", shp->shp_mobil);
358 pr("%4d\n", shp->shp_tech);
363 shp_mess(s_char *str, struct mlist *mlp)
365 mpr(mlp->ship.shp_own, "%s %s & stays in %s\n",
367 str, xyas(mlp->ship.shp_x, mlp->ship.shp_y, mlp->ship.shp_own));
368 mlp->ship.shp_mobil = (int)mlp->mobil;
369 putship(mlp->ship.shp_uid, &mlp->ship);
370 emp_remque((struct emp_qelem *)mlp);
375 shp_check_nav(struct sctstr *sect)
377 switch (dchr[sect->sct_type].d_flg & 03) {
382 if (sect->sct_effic < 2)
383 return CN_CONSTRUCTION;
386 if (sect->sct_effic < 60)
387 return CN_CONSTRUCTION;
390 return CN_LANDLOCKED;
396 shp_count(struct emp_qelem *list, int wantflags, int nowantflags, int x,
399 struct emp_qelem *qp;
400 struct emp_qelem *next;
404 for (qp = list->q_back; qp != list; qp = next) {
406 mlp = (struct mlist *)qp;
407 if (mlp->ship.shp_x != x || mlp->ship.shp_y != y)
409 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
411 if (nowantflags && mlp->mcp->m_flags & nowantflags)
419 shp_damage_one(struct mlist *mlp, int dam)
421 shipdamage(&mlp->ship, dam);
422 putship(mlp->ship.shp_uid, &mlp->ship);
423 if (!mlp->ship.shp_own) {
424 emp_remque((struct emp_qelem *)mlp);
430 shp_damage(struct emp_qelem *list, int totdam, int wantflags,
431 int nowantflags, int x, int y)
433 struct emp_qelem *qp;
434 struct emp_qelem *next;
440 || !(count = shp_count(list, wantflags, nowantflags, x, y)))
442 dam = ldround(((double)totdam / (double)count), 1);
443 for (qp = list->q_back; qp != list; qp = next) {
445 mlp = (struct mlist *)qp;
446 if (mlp->ship.shp_x != x || mlp->ship.shp_y != y)
448 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
450 if (nowantflags && mlp->mcp->m_flags & nowantflags)
452 shp_damage_one(mlp, dam);
458 shp_contains(struct emp_qelem *list, int newx, int newy, int wantflags,
461 struct emp_qelem *qp;
462 struct emp_qelem *next;
465 for (qp = list->q_back; qp != list; qp = next) {
467 mlp = (struct mlist *)qp;
468 /* If the ship isn't in the requested sector, then continue */
469 if (newx != mlp->ship.shp_x || newy != mlp->ship.shp_y)
471 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
473 if (nowantflags && mlp->mcp->m_flags & nowantflags)
480 static struct mlist *
481 most_valuable_ship(struct emp_qelem *list)
483 struct emp_qelem *qp;
484 struct emp_qelem *next;
486 struct mlist *mvs = 0;
488 for (qp = list->q_back; qp != list; qp = next) {
490 mlp = (struct mlist *)qp;
491 if (mlp->mcp->m_flags & M_SUB)
493 if (!mlp->mcp->m_nxlight &&
494 !mlp->mcp->m_nchoppers &&
495 mlp->mcp->m_cost < 1000 &&
496 !mlp->mcp->m_nplanes && !mlp->mcp->m_nland)
502 if (mlp->mcp->m_cost * mlp->ship.shp_effic >
503 mvs->mcp->m_cost * mvs->ship.shp_effic)
510 shp_easiest_target(struct emp_qelem *list, int wantflags, int nowantflags)
512 struct emp_qelem *qp;
513 struct emp_qelem *next;
516 int easiest = 9876; /* things start great for victim */
519 for (qp = list->q_back; qp != list; qp = next) {
521 mlp = (struct mlist *)qp;
522 if (wantflags && (mlp->mcp->m_flags & wantflags) != wantflags)
524 if (nowantflags && mlp->mcp->m_flags & nowantflags)
526 hard = shp_hardtarget(&mlp->ship);
528 easiest = hard; /* things get worse for victim */
531 return easiest - count;
535 shp_missile_interdiction(struct emp_qelem *list, coord newx, coord newy,
541 struct emp_qelem msl_list, *qp, *newqp;
545 msl_sel(&msl_list, newx, newy, victim, P_T | P_MAR, 0, MI_INTERDICT);
548 while (!QEMPTY(&msl_list) && (mvs = most_valuable_ship(list))) {
549 sprintf(what, "%s", prship(&mvs->ship));
550 dam = msl_launch_mindam(&msl_list, newx, newy,
551 shp_hardtarget(&mvs->ship),
552 EF_SHIP, 1, what, victim, MI_INTERDICT);
555 "missile interdiction mission does %d damage to %s!\n",
557 shp_damage_one(mvs, dam);
560 } else if (++twotries >= 2) {
564 qp = msl_list.q_forw;
565 while (qp != msl_list.q_forw) {
575 /* Note that this function has a side effect - it uses coastwatch
576 * ranges to see if it should fire upon a ship. So, this function
577 * is expected to return positive if a ship is in range, and 0 if a
578 * ship is not in range. */
580 notify_coastguard(struct emp_qelem *list, int trange, struct sctstr *sectp)
582 struct emp_qelem *qp;
583 struct emp_qelem *next;
588 natp = getnatp(sectp->sct_own);
590 vrange = sectp->sct_type == SCT_RADAR ? 14 : 4;
591 vrange *= tfact(sectp->sct_own, 1.0) * sectp->sct_effic / 100.0;
599 /* We got here, so we could theoretically see the ship. Now,
600 * do we want to see it in our telebox? If not, return positive
601 * since we could see the ship and want forts to fire. */
602 if (!(natp->nat_flags & NF_COASTWATCH))
605 for (qp = list->q_back; qp != list; qp = next) {
607 mlp = (struct mlist *)qp;
608 if (mlp->mcp->m_flags & M_SUB)
610 wu(0, sectp->sct_own,
611 "%s %s sighted at %s\n",
612 cname(mlp->ship.shp_own),
614 xyas(mlp->ship.shp_x, mlp->ship.shp_y, sectp->sct_own));
616 setcont(sectp->sct_own, mlp->ship.shp_own, FOUND_LOOK);
624 shp_fort_interdiction(struct emp_qelem *list, coord newx, coord newy,
630 double range, range2, guneff;
634 s_char notified[MAXNOC];
637 /* Inform neutral and worse */
638 for (i = 0; i < MAXNOC; ++i) {
639 if (getrel(getnatp(i), victim) <= NEUTRAL)
645 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
646 while (nxtsct(&ns, &fsect)) {
649 if (fsect.sct_own == victim)
651 if (notified[fsect.sct_own])
653 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
654 if (notify_coastguard(list, trange, &fsect))
655 notified[fsect.sct_own] = 1;
657 if (opt_NO_FORT_FIRE)
658 return 0; /* Only coastwatch notify in nofortfire */
659 /* Only fire at Hostile ships */
660 for (i = 0; i < MAXNOC; ++i) {
661 if (getrel(getnatp(i), victim) >= NEUTRAL)
664 snxtsct_dist(&ns, newx, newy, fort_max_interdiction_range);
665 while (nxtsct(&ns, &fsect)) {
666 if (!notified[fsect.sct_own])
668 if (fsect.sct_type != SCT_FORTR)
670 gun = fsect.sct_item[I_GUN];
673 range = tfactfire(fsect.sct_own, (double)min(gun, 7));
674 if (fsect.sct_effic > 59)
676 range2 = roundrange(range);
677 trange = mapdist(newx, newy, fsect.sct_x, fsect.sct_y);
680 if (fsect.sct_item[I_MILIT] < 5)
682 shell = fsect.sct_item[I_SHELL];
684 shell += supply_commod(fsect.sct_own,
685 fsect.sct_x, fsect.sct_y, I_SHELL, 1);
689 fsect.sct_item[I_SHELL] = shell;
693 guneff = landgun((int)fsect.sct_effic, gun);
696 mpr(victim, "Incoming fire does %d damage!\n", dam);
698 mpr(victim, "%s fires at you for %d!\n",
699 xyas(fsect.sct_x,fsect.sct_y,victim),
703 "%s fires at %s ships in %s for %d!\n",
704 xyas(fsect.sct_x, fsect.sct_y,
706 cname(victim), xyas(newx, newy, fsect.sct_own), dam);
707 nreport(fsect.sct_own, N_SHP_SHELL, victim, 1);
710 return shp_damage(list, totdam, 0, M_SUB, newx, newy);
715 shp_interdict(struct emp_qelem *list, coord newx, coord newy, natid victim)
719 if (shp_contains(list, newx, newy, 0, M_SUB)) {
720 stopping |= shp_fort_interdiction(list, newx, newy, victim);
722 if (shp_contains(list, newx, newy, 0, M_SUB)) {
725 unit_interdict(newx, newy, victim, "ships",
726 shp_easiest_target(list, 0,
728 MI_INTERDICT), 0, M_SUB, newx,
730 if (most_valuable_ship(list)) {
732 shp_missile_interdiction(list, newx, newy, victim);
736 if (shp_contains(list, newx, newy, M_SUB, 0)) {
739 unit_interdict(newx, newy, victim, "subs",
740 shp_easiest_target(list, M_SUB, 0),
741 MI_SINTERDICT), M_SUB, 0, newx,
747 /* high value of hardtarget is harder to hit */
749 shp_hardtarget(struct shpstr *sp)
753 struct mchrstr *mcp = mchr + sp->shp_type;
756 getsect(sp->shp_x, sp->shp_y, §);
757 onsea = (sect.sct_type == SCT_WATER);
758 if (mcp->m_flags & M_SUB)
760 return (int)(((double)sp->shp_effic / 100.0) *
761 (20 + (double)sp->shp_speed * onsea / 2.0 - vis));
765 shp_hit_mine(struct shpstr *sp, struct mchrstr *mcp)
769 mpr(sp->shp_own, "Kawhomp! Mine detected in %s!\n",
770 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
772 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
774 m = 22.0 + (double)(random() % 21);
775 if (mcp->m_flags & M_SWEEP)
778 shipdamage(sp, ldround(m, 1));
784 shp_view(struct emp_qelem *list)
787 struct emp_qelem *qp;
788 struct emp_qelem *next;
791 for (qp = list->q_back; qp != list; qp = next) {
793 mlp = (struct mlist *)qp;
794 getsect(mlp->ship.shp_x, mlp->ship.shp_y, §);
795 if (mlp->mcp->m_flags & M_FOOD)
796 mpr(mlp->ship.shp_own, "[fert:%d] ", sect.sct_fertil);
797 if (mlp->mcp->m_flags & M_OIL)
798 mpr(mlp->ship.shp_own, "[oil:%d] ", sect.sct_oil);
799 mpr(mlp->ship.shp_own, "%s @ %s %d%% %s\n",
801 xyas(mlp->ship.shp_x, mlp->ship.shp_y, player->cnum),
802 sect.sct_effic, dchr[sect.sct_type].d_name);
807 shp_nav_one_sector(struct emp_qelem *list, int dir, natid actor,
811 struct emp_qelem *qp;
812 struct emp_qelem *next;
813 struct emp_qelem *nqp;
814 struct emp_qelem *nnext;
822 double tech; /* for mapping */
823 double tf; /* for mapping */
826 if (dir <= DIR_STOP || dir >= DIR_VIEW) {
827 shp_put(list, actor);
832 for (qp = list->q_back; qp != list; qp = next) {
834 mlp = (struct mlist *)qp;
835 newx = xnorm(mlp->ship.shp_x + dx);
836 newy = ynorm(mlp->ship.shp_y + dy);
837 getsect(newx, newy, §);
838 if (shp_check_nav(§) != CN_NAVIGABLE ||
839 (sect.sct_own && actor != sect.sct_own &&
840 getrel(getnatp(sect.sct_own), actor) < FRIENDLY)) {
842 mpr(actor, "can't go to %s\n", xyas(newx, newy, actor));
845 sprintf(dp, "can't go to %s", xyas(newx, newy, actor));
850 if (opt_BIG_CITY && sect.sct_type == SCT_CAPIT) {
851 if (mlp->mcp->m_lcm + 2 * mlp->mcp->m_hcm >= 60) {
853 "is too large to fit into the canal system at %s",
854 xyas(newx, newy, actor));
859 if (mlp->mobil <= 0.0) {
860 shp_mess("is out of mobility", mlp);
863 mobcost = mlp->ship.shp_effic * 0.01 * mlp->ship.shp_speed;
865 (mobcost + techfact(mlp->ship.shp_tech, mobcost));
866 mlp->ship.shp_x = newx;
867 mlp->ship.shp_y = newy;
868 if (mlp->mobil - mobcost < -127) {
871 mlp->mobil -= mobcost;
873 mlp->ship.shp_mobil = (int)mlp->mobil;
874 putship(mlp->ship.shp_uid, &mlp->ship);
875 mlp->done = 0; /* We haven't interdicted this ship yet */
877 /* Now update the map for this ship */
878 tech = techfact(mlp->ship.shp_tech, (double)mlp->mcp->m_vrnge);
879 if (mlp->mcp->m_flags & M_SONAR)
880 tf = techfact(mlp->ship.shp_tech, 1.0);
883 radmapupd(mlp->ship.shp_own, mlp->ship.shp_x, mlp->ship.shp_y,
884 (int)mlp->ship.shp_effic, (int)tech, tf);
888 stopping |= shp_sweep(list, 0, actor);
891 stopping |= shp_check_mines(list);
895 /* Ok, run through each ship and interdict each coordinate */
896 for (qp = list->q_back; qp != list; qp = next) {
898 mlp = (struct mlist *)qp;
899 /* Has this ship been interdicted yet? */
902 newx = mlp->ship.shp_x;
903 newy = mlp->ship.shp_y;
904 stopping |= shp_interdict(list, newx, newy, actor);
907 /* Now, set all ships in this coordinate to done */
908 for (nqp = list->q_back; nqp != list; nqp = nnext) {
910 mlp = (struct mlist *)nqp;
911 if (mlp->ship.shp_x == newx && mlp->ship.shp_y == newy)
921 * Check for incoming missiles with a P_MAR flag.
922 * Return True=1 if the missile was shotdown.
925 * Chad Zabel, July 95
929 shp_missile_defense(coord dx, coord dy, natid bombown, int hardtarget)
935 double gun, eff, teff;
937 snxtitem_dist(&ni, EF_SHIP, dx, dy, 1);
939 while (nxtitem(&ni, (caddr_t)&ship)) {
943 if (!(mchr[(int)ship.shp_type].m_flags & M_ANTIMISSILE))
946 if (getrel(getnatp(ship.shp_own), bombown) >= NEUTRAL)
949 if (ship.shp_effic < 60)
952 if (getvec(VT_ITEM, vec, (caddr_t)&ship, EF_SHIP) < 0)
954 if (vec[I_MILIT] < 1) /* do we have mil? */
956 if (vec[I_SHELL] < 2) { /* do we need shells */
957 vec[I_SHELL] += supply_commod(ship.shp_own,
958 ship.shp_x, ship.shp_y,
960 if (vec[I_SHELL] < 2)
963 if (vec[I_GUN] < 1) /* we need at least 1 gun */
966 /* now calculate the odds */
967 gun = ((double)min(vec[I_GUN], ship.shp_glim));
968 eff = (double)ship.shp_effic / 100.0;
970 (((double)ship.shp_tech) / (((double)ship.shp_tech) + 200.0));
971 /* raise 4.5 for better interception -KHS */
972 hitchance = (int)(gun * eff * teff * 4.5) - hardtarget;
978 mpr(bombown, "%s anti-missile system activated...",
979 cname(ship.shp_own));
980 mpr(ship.shp_own, "Ship #%i anti-missile system activated!\n",
982 mpr(ship.shp_own, "%d%% hitchance...", hitchance);
984 ship.shp_item[I_SHELL] = vec[I_SHELL] - 2;
985 putship(ship.shp_uid, &ship);
987 if (roll(100) <= hitchance) {
988 mpr(bombown, "KABOOOM!! Missile destroyed\n\n");
990 "KABOOOM!! Incoming missile destroyed!\n\n");
993 mpr(bombown, "SWOOSH!! anti-missile system failed!!\n");
995 "SWOOSH!! Missile evades anti-missile systems\n\n");
998 return 0; /* all attempts failed */
1002 shp_path(int together, struct shpstr *shp, s_char *buf)
1006 struct sctstr d_sect;
1009 if (!sarg_xy(buf, &destx, &desty))
1013 "Cannot go to a destination sector if not all starting in the same sector\n");
1016 if (!getsect(destx, desty, &d_sect)) {
1017 mpr(shp->shp_own, "%d,%d is not a sector\n", destx, desty);
1021 cp = (s_char *)BestShipPath(buf, shp->shp_x, shp->shp_y,
1022 d_sect.sct_x, d_sect.sct_y, player->cnum);
1023 if (!cp || shp->shp_mobil <= 0) {
1024 mpr(shp->shp_own, "Can't get to '%s' right now.\n",
1025 xyas(d_sect.sct_x, d_sect.sct_y, player->cnum));
1031 /* Fire missiles at a ship which has fired shells */
1033 shp_missdef(struct shpstr *sp, natid victim)
1035 struct emp_qelem list;
1042 mlp = (struct mlist *)malloc(sizeof(struct mlist));
1043 mlp->mcp = &mchr[(int)sp->shp_type];
1045 mlp->mobil = (double)sp->shp_mobil;
1046 emp_insque(&mlp->queue, &list);
1047 sprintf(buf, "%s", prship(&mlp->ship));
1049 eff = sp->shp_effic;
1050 if (most_valuable_ship(&list)) {
1051 shp_missile_interdiction(&list, sp->shp_x, sp->shp_y, sp->shp_own);
1052 getship(sp->shp_uid, sp);
1056 "missiles launched in defense did 100%% damage to %s\n",
1058 wu(0, victim, "%s sunk!\n", buf);
1059 } else if (eff > 0 && sp->shp_effic < eff) {
1061 "missiles launched in defense did %d%% damage to %s\n",
1062 100 * (eff - sp->shp_effic) / eff, buf);