2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2008, 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 * mission.c: Mission subroutines for planes/ships/units
30 * Known contributors to this file:
32 * Steve McClure, 1996-2000
47 #include "prototypes.h"
52 struct emp_qelem queue; /* list of units */
53 void *cp; /* pointer to desc of thing */
54 struct empobj *thing; /* thing's struct */
58 struct emp_qelem queue;
63 static void add_airport(struct emp_qelem *, coord, coord);
64 static int air_damage(struct emp_qelem *, coord, coord, int, natid,
66 static void build_mission_list(struct genlist *, coord, coord, int, natid);
67 static void build_mission_list_type(struct genlist *, coord, coord, int,
69 static void divide(struct emp_qelem *, struct emp_qelem *, coord, coord);
70 static int dosupport(struct genlist *, coord, coord, natid, natid);
71 static int find_airport(struct emp_qelem *, coord, coord);
72 static int mission_pln_arm(struct emp_qelem *, coord, coord, int,
73 int, struct ichrstr *, int, int);
74 static void mission_pln_sel(struct emp_qelem *, int, int, int);
75 static int perform_mission(coord, coord, natid, struct emp_qelem *, int,
79 * Interdict commodities & transported planes
82 ground_interdict(coord x, coord y, natid victim, char *s)
85 int dam = 0, newdam, rel;
86 struct genlist mi[MAXNOC];
89 memset(mi, 0, sizeof(mi));
90 for (z = 1; z < MAXNOC; z++)
91 emp_initque((struct emp_qelem *)&mi[z]);
93 build_mission_list(mi, x, y, MI_INTERDICT, victim);
95 for (cn = 1; cn < MAXNOC; cn++) {
96 rel = getrel(getnatp(cn), victim);
100 if (QEMPTY(&mi[cn].queue))
103 newdam = perform_mission(x, y, victim, &mi[cn].queue,
104 MI_INTERDICT, s, SECT_HARDTARGET);
107 mpr(victim, "%s interdiction mission does %d damage!\n",
111 collateral_damage(x, y, dam);
117 collateral_damage(coord x, coord y, int dam)
125 getsect(x, y, §);
127 coll = ldround((double)dam * collateral_dam, 1);
130 mpr(sect.sct_own, "%s takes %d%% collateral damage\n",
131 xyas(x, y, sect.sct_own), coll);
132 sectdamage(§, coll);
140 only_subs(struct emp_qelem *list)
142 struct emp_qelem *qp;
146 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
147 glp = (struct genlist *)qp;
149 if (glp->thing->ef_type != EF_SHIP)
152 if (!(mcp->m_flags & M_SUB))
156 /* They were all subs! */
162 * Interdict ships & land units
165 unit_interdict(coord x, coord y, natid victim, char *s, int hardtarget,
170 struct genlist mi[MAXNOC];
174 memset(mi, 0, sizeof(mi));
175 for (z = 1; z < MAXNOC; z++)
176 emp_initque((struct emp_qelem *)&mi[z]);
178 build_mission_list(mi, x, y, mission, victim);
180 for (cn = 1; cn < MAXNOC; cn++) {
183 if (mission == MI_SINTERDICT) {
184 if (getrel(getnatp(cn), victim) >= FRIENDLY)
186 } else if (getrel(getnatp(cn), victim) > HOSTILE)
189 if (QEMPTY(&mi[cn].queue))
192 osubs = only_subs(&mi[cn].queue);
193 newdam = perform_mission(x, y, victim, &mi[cn].queue,
194 mission, s, hardtarget);
197 /* If only subs responded, then we don't know who's
199 mpr(victim, "%s interdiction mission does %d damage!\n",
200 osubs ? "Enemy" : cname(cn), newdam);
204 collateral_damage(x, y, dam);
210 * Perform a mission against victim, on behalf of actee
213 off_support(coord x, coord y, natid victim, natid actee)
216 struct genlist mi[MAXNOC];
219 memset(mi, 0, sizeof(mi));
220 for (z = 1; z < MAXNOC; z++)
221 emp_initque((struct emp_qelem *)&mi[z]);
223 build_mission_list(mi, x, y, MI_SUPPORT, victim);
224 build_mission_list(mi, x, y, MI_OSUPPORT, victim);
226 dam = dosupport(mi, x, y, victim, actee);
231 * Perform a mission against victim, on behalf of actee
234 def_support(coord x, coord y, natid victim, natid actee)
237 struct genlist mi[MAXNOC];
240 memset(mi, 0, sizeof(mi));
241 for (z = 1; z < MAXNOC; z++)
242 emp_initque((struct emp_qelem *)&mi[z]);
244 build_mission_list(mi, x, y, MI_SUPPORT, victim);
245 build_mission_list(mi, x, y, MI_DSUPPORT, victim);
247 dam = dosupport(mi, x, y, victim, actee);
252 dosupport(struct genlist *mi, coord x, coord y, natid victim, natid actee)
258 for (cn = 1; cn < MAXNOC; cn++) {
259 rel = getrel(getnatp(cn), actee);
260 if ((cn != actee) && (rel != ALLIED))
262 rel = getrel(getnatp(cn), victim);
263 if ((cn != actee) && (rel != AT_WAR))
266 if (QEMPTY(&mi[cn].queue))
269 dam += perform_mission(x, y, victim, &mi[cn].queue, MI_SUPPORT,
270 "", SECT_HARDTARGET);
276 build_mission_list(struct genlist *mi, coord x, coord y, int mission,
279 build_mission_list_type(mi, x, y, mission, EF_LAND, victim);
280 build_mission_list_type(mi, x, y, mission, EF_SHIP, victim);
281 build_mission_list_type(mi, x, y, mission, EF_PLANE, victim);
285 build_mission_list_type(struct genlist *mi, coord x, coord y, int mission,
286 int type, natid victim)
291 union empobj_storage item;
297 snxtitem_all(&ni, type);
298 while (nxtitem(&ni, &item)) {
299 gp = (struct empobj *)&item;
307 if ((gp->mission != mission) && (mission != MI_SINTERDICT))
310 if ((gp->mission != mission) && (mission == MI_SINTERDICT) &&
311 (gp->mission != MI_INTERDICT))
314 relat = getrel(getnatp(gp->own), victim);
315 if (mission == MI_SINTERDICT) {
316 if (relat >= FRIENDLY)
318 else if (type != EF_PLANE && relat > HOSTILE)
320 } else if (relat > HOSTILE)
323 dist = mapdist(x, y, gp->opx, gp->opy);
326 if (mission != MI_RESERVE) /* XXX */
327 oprange(gp, &radius);
332 /* Ok, it is within the operations range. */
333 /* Now check from where the object actually is */
334 dist = mapdist(x, y, gp->x, gp->y);
336 oprange(gp, &radius);
339 /* Ok, the object can get to where the x,y is */
342 if (mission != MI_AIR_DEFENSE) {
343 getsect(x, y, §);
344 if (getrel(getnatp(gp->own), sect.sct_own) > AT_WAR) {
347 * If the owner of the unit isn't at war
348 * with the victim, and doesn't own the
349 * sect being acted upon, and isn't the
350 * old owner of that sect, bounce them.
352 if (sect.sct_type != SCT_WATER &&
353 sect.sct_own != gp->own &&
354 sect.sct_oldown != gp->own)
360 glp = malloc(sizeof(struct genlist));
361 memset(glp, 0, sizeof(struct genlist));
362 glp->cp = get_empobj_chr(gp);
363 glp->thing = malloc(sizeof(item));
364 memcpy(glp->thing, &item, sizeof(item));
365 emp_insque(&glp->queue, &mi[gp->own].queue);
370 find_escorts(coord x, coord y, natid cn, struct emp_qelem *escorts)
377 snxtitem_all(&ni, EF_PLANE);
378 while (nxtitem(&ni, &plane)) {
379 if (plane.pln_own != cn)
382 if (plane.pln_mission != MI_ESCORT)
385 dist = mapdist(x, y, plane.pln_x, plane.pln_y);
386 if (dist > plane.pln_range / 2)
389 plp = malloc(sizeof(struct plist));
390 memset(plp, 0, sizeof(struct plist));
391 plp->pcp = &plchr[(int)plane.pln_type];
393 emp_insque(&plp->queue, escorts);
398 perform_mission(coord x, coord y, natid victim, struct emp_qelem *list,
399 int mission, char *s, int hardtarget)
401 struct emp_qelem *qp, missiles, bombers, escorts, airp, b, e;
402 struct emp_qelem *newqp;
410 struct plchrstr *pcp;
411 int dam = 0, dam2, mission_flags;
412 natid plane_owner = 0;
413 int md, range, air_dam = 0;
414 double prb, hitchance, vrange;
415 int targeting_ships = *s == 's'; /* "subs" or "ships" FIXME gross! */
417 getsect(x, y, §);
419 emp_initque(&missiles);
420 emp_initque(&bombers);
421 emp_initque(&escorts);
424 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
425 glp = (struct genlist *)qp;
428 md = mapdist(x, y, gp->x, gp->y);
430 if (glp->thing->ef_type == EF_LAND) {
431 lp = (struct lndstr *)glp->thing;
433 if (mission == MI_SINTERDICT)
436 if ((mission == MI_INTERDICT) &&
437 (md > land_max_interdiction_range))
440 /* Too ponderous for interdiction fire */
441 if (lchr[(int)lp->lnd_type].l_flags & L_HEAVY)
444 range = roundrange(lnd_fire_range(lp));
449 putland(lp->lnd_uid, lp);
453 if (targeting_ships) {
454 if (chance(lnd_acc(lp) / 100.0))
455 dam2 = ldround(dam2 / 2.0, 1);
459 nreport(lp->lnd_own, N_SHP_SHELL, victim, 1);
461 nreport(lp->lnd_own, N_SCT_SHELL, victim, 1);
463 "%s fires at %s %s at %s\n",
464 prland(lp), cname(victim), s, xyas(x, y, lp->lnd_own));
466 mpr(victim, "%s %s fires at you at %s\n",
467 cname(lp->lnd_own), prland(lp), xyas(x, y, victim));
468 } else if (glp->thing->ef_type == EF_SHIP) {
469 sp = (struct shpstr *)glp->thing;
472 if (((mission == MI_INTERDICT) ||
473 (mission == MI_SINTERDICT)) &&
474 (md > ship_max_interdiction_range))
477 if ((mcp->m_flags & M_SUB) &&
478 (sect.sct_type != SCT_WATER))
481 if (mission == MI_SINTERDICT) {
482 if (!(mcp->m_flags & M_SONAR))
484 if (!(mcp->m_flags & M_DCH) && !(mcp->m_flags & M_SUBT))
486 vrange = techfact(sp->shp_tech, mcp->m_vrnge);
487 vrange *= sp->shp_effic / 200.0;
490 /* can't look all the time */
494 if (mcp->m_flags & M_SUB) {
495 if (!targeting_ships)
496 continue; /* subs interdict only ships */
497 range = roundrange(torprange(sp));
500 if (!line_of_sight(NULL, x, y, gp->x, gp->y))
502 dam2 = shp_torp(sp, 1);
503 putship(sp->shp_uid, sp);
506 hitchance = shp_torp_hitchance(sp, md);
509 "%s locking on %s %s in %s\n",
510 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
512 "\tEffective torpedo range is %d.0\n", range);
514 "\tWhooosh... Hitchance = %d%%\n",
515 (int)(hitchance * 100));
517 if (!chance(hitchance)) {
518 wu(0, sp->shp_own, "\tMissed\n");
520 "Incoming torpedo sighted @ %s missed (whew)!\n",
524 wu(0, sp->shp_own, "\tBOOM!...\n");
526 nreport(victim, N_TORP_SHIP, 0, 1);
528 "\tTorpedo hit %s %s for %d damage\n",
529 cname(victim), s, dam2);
532 "Incoming torpedo sighted @ %s hits and does %d damage!\n",
533 xyas(x, y, victim), dam2);
535 range = roundrange(shp_fire_range(sp));
538 if (mission == MI_SINTERDICT)
539 dam2 = shp_dchrg(sp);
542 putship(sp->shp_uid, sp);
548 prb = (double)md / range;
554 nreport(sp->shp_own, N_SHP_SHELL, victim, 1);
556 nreport(sp->shp_own, N_SCT_SHELL, victim, 1);
558 "%s fires at %s %s at %s\n",
559 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
561 mpr(victim, "%s %s fires at you at %s\n",
562 cname(sp->shp_own), prship(sp), xyas(x, y, victim));
564 } else if (glp->thing->ef_type == EF_PLANE) {
566 if (pcp->pl_flags & P_M)
567 /* units have their own missile interdiction */
568 if (hardtarget != SECT_HARDTARGET || pcp->pl_flags & P_MAR)
571 /* save planes for later */
572 plp = malloc(sizeof(struct plist));
574 memset(plp, 0, sizeof(struct plist));
576 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
577 if (plp->pcp->pl_flags & P_M)
578 emp_insque(&plp->queue, &missiles);
580 emp_insque(&plp->queue, &bombers);
581 plane_owner = plp->plane.pln_own;
587 if (!QEMPTY(&missiles)) {
588 /* I arbitrarily chose 100 mindam -KHS */
590 msl_launch_mindam(&missiles, x, y, hardtarget, EF_SECTOR, 100,
591 "sector", victim, mission);
592 qp = missiles.q_forw;
593 while (qp != (&missiles)) {
601 if (QEMPTY(&bombers)) {
604 glp = (struct genlist *)qp;
613 * If there are planes performing an
614 * interdict or support mission, find
615 * some escorts for them, if possible.
616 * Up to 2 per bomber, if possible.
618 find_escorts(x, y, plane_owner, &escorts);
620 if (mission == MI_SINTERDICT)
621 mission_pln_sel(&bombers, P_T | P_A, 0, hardtarget);
623 mission_pln_sel(&bombers, P_T, P_A, SECT_HARDTARGET);
625 mission_pln_sel(&escorts, P_ESC | P_F, 0, SECT_HARDTARGET);
627 for (qp = bombers.q_forw; qp != (&bombers); qp = qp->q_forw) {
628 plp = (struct plist *)qp;
629 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
630 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
633 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
638 air = (struct airport *)qp;
639 md = mapdist(x, y, air->x, air->y);
644 /* Split off the bombers at this base into b */
645 divide(&bombers, &b, air->x, air->y);
647 /* Split off the escorts at this base into e */
648 divide(&escorts, &e, air->x, air->y);
651 mission_flags |= P_X; /* stealth (shhh) */
652 mission_flags |= P_H; /* gets turned off if not all choppers */
654 mission_flags = mission_pln_arm(&b, air->x, air->y, 2 * md, 'p', 0,
660 mission_flags = mission_pln_arm(&e, air->x, air->y, 2 * md, 'p', 0,
661 P_F | P_ESC, mission_flags);
663 pp = BestAirPath(buf, air->x, air->y, x, y);
664 if (CANT_HAPPEN(!pp))
666 wu(0, plane_owner, "Flying %s mission from %s\n",
667 mission_name(mission), xyas(air->x, air->y, plane_owner));
668 if (air->own && (air->own != plane_owner)) {
669 wu(0, air->own, "%s is flying %s mission from %s\n",
670 cname(plane_owner), mission_name(mission),
671 xyas(air->x, air->y, air->own));
674 ac_encounter(&b, &e, air->x, air->y, pp, mission_flags, 0);
678 air_damage(&b, x, y, mission, victim, s, hardtarget);
687 nreport(plane_owner, N_SHP_BOMB, victim, 1);
689 nreport(plane_owner, N_SCT_BOMB, victim, 1);
692 /* free up all this memory */
695 glp = (struct genlist *)qp;
703 while (qp != (&escorts)) {
711 while (qp != (&bombers)) {
722 cando(int mission, int type)
726 if (type == EF_PLANE)
730 if (type == EF_PLANE)
734 if ((type == EF_PLANE) || (type == EF_SHIP))
742 if (type == EF_PLANE)
755 mission_name(short mission)
759 return "an interdiction";
763 return "a offensive support";
765 return "a defensive support";
771 return "a sub interdiction";
773 return "an air defense";
775 return "a mysterious";
779 show_mission(int type, struct nstr_item *np)
781 int first = 1, radius;
782 union empobj_storage item;
785 while (nxtitem(np, &item)) {
786 gp = (struct empobj *)&item;
787 if (!player->owner || gp->own == 0)
791 pr("Thing x,y op-sect rad mission\n");
794 pr("%-25s", obj_nameof(gp));
795 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
796 if (gp->mission == MI_INTERDICT || gp->mission == MI_SUPPORT ||
797 gp->mission == MI_OSUPPORT ||
798 gp->mission == MI_DSUPPORT || gp->mission == MI_AIR_DEFENSE) {
800 oprange(gp, &radius);
801 prxy(" %3d,%-3d", gp->opx, gp->opy, player->cnum);
802 if (radius < gp->radius)
805 pr(" %4d", gp->radius);
806 } else if (gp->mission == MI_RESERVE) {
810 getsect(gp->x, gp->y, §);
811 if ((sect.sct_type == SCT_HEADQ) && (sect.sct_effic >= 60))
814 if (item.land.lnd_rad_max == 0)
817 plus += item.land.lnd_rad_max;
818 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
820 } else if (gp->mission == MI_ESCORT) {
822 pr(" %4d", item.plane.pln_range / 2);
826 pr(" is on %s mission\n", mission_name(gp->mission));
828 pr(" has no mission.\n");
833 oprange(struct empobj *gp, int *radius)
837 switch (gp->ef_type) {
839 range = ldround(shp_fire_range((struct shpstr *)gp), 1);
842 range = ldround(lnd_fire_range((struct lndstr *)gp), 1);
845 /* missiles go one way, so we can use all the range */
846 if (plchr[(int)gp->type].pl_flags & P_M)
847 range = ((struct plnstr *)gp)->pln_range;
849 range = ((struct plnstr *)gp)->pln_range / 2;
863 * Remove all planes who cannot go on
864 * the mission from the plane list.
867 mission_pln_sel(struct emp_qelem *list, int wantflags, int nowantflags,
870 struct emp_qelem *qp, *next;
872 struct plchrstr *pcp;
875 for (qp = list->q_forw; qp != list; qp = next) {
877 plp = (struct plist *)qp;
881 if (pp->pln_effic < 40) {
887 if (pp->pln_mobil < 1) {
894 if (ontradingblock(EF_PLANE, pp)) {
901 if (!pln_capable(pp, wantflags, nowantflags)) {
907 if (!pln_airbase_ok(pp, 0, 0)) {
913 if (pcp->pl_flags & P_A) {
914 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
921 putplane(pp->pln_uid, pp);
926 * Arm only the planes at x,y
929 mission_pln_arm(struct emp_qelem *list, coord x, coord y, int dist,
930 int mission, struct ichrstr *ip, int flags,
933 struct emp_qelem *qp;
934 struct emp_qelem *next;
938 for (qp = list->q_forw; qp != list; qp = next) {
940 plp = (struct plist *)qp;
948 if (CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED)
949 || mission_pln_equip(plp, ip, flags, mission) < 0) {
954 if (flags & (P_S | P_I)) {
955 if (plp->pcp->pl_flags & P_S)
956 mission_flags |= P_S;
957 if (plp->pcp->pl_flags & P_I)
958 mission_flags |= P_I;
960 if (!(plp->pcp->pl_flags & P_H))
961 /* no stealth on this mission */
962 mission_flags &= ~P_H;
963 if (!(plp->pcp->pl_flags & P_X))
964 /* no stealth on this mission */
965 mission_flags &= ~P_X;
966 if (!(plp->pcp->pl_flags & P_A)) {
967 /* no asw on this mission */
968 mission_flags &= ~P_A;
970 if (!(plp->pcp->pl_flags & P_MINE)) {
971 /* no asw on this mission */
972 mission_flags &= ~P_MINE;
975 pp->pln_flags |= PLN_LAUNCHED;
976 pp->pln_mobil -= pln_mobcost(dist, pp, flags);
977 putplane(pp->pln_uid, pp);
979 return mission_flags;
983 mission_pln_equip(struct plist *plp, struct ichrstr *ip, int flags,
986 struct plchrstr *pcp;
997 if (pp->pln_ship >= 0) {
998 getship(pp->pln_ship, &ship);
999 item = ship.shp_item;
1000 } else if (pp->pln_land >= 0) {
1001 getland(pp->pln_land, &land);
1002 item = land.lnd_item;
1004 getsect(pp->pln_x, pp->pln_y, §);
1005 item = sect.sct_item;
1007 if (pcp->pl_fuel > item[I_PETROL]) {
1010 item[I_PETROL] -= pcp->pl_fuel;
1011 if (!(flags & P_F)) {
1012 load = pln_load(pp);
1016 case 's': /* strategic bomb */
1017 case 'p': /* pinpoint bomb */
1018 if (pp->pln_nuketype == -1) {
1023 case 't': /* transport */
1024 case 'd': /* drop */
1025 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1028 needed = (load * 2) / ip->i_lbs;
1030 case 'a': /* paradrop */
1031 if ((pcp->pl_flags & (P_V | P_C)) == 0)
1034 needed = load / ip->i_lbs;
1036 case 'i': /* missile interception */
1042 case 'r': /* reconnaissance */
1043 case 0: /* plane interception */
1049 if (itype != I_NONE && needed <= 0)
1051 if (itype != I_NONE) {
1052 if (itype == I_SHELL && item[itype] < needed)
1053 item[itype] += supply_commod(plp->plane.pln_own,
1057 if (item[itype] < needed)
1059 item[itype] -= needed;
1061 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
1062 plp->bombs = needed;
1066 if (pp->pln_ship >= 0)
1067 putship(ship.shp_uid, &ship);
1068 else if (pp->pln_land >= 0)
1069 putland(land.lnd_uid, &land);
1076 * Return 1 if this x,y pair is in the list
1079 find_airport(struct emp_qelem *airp, coord x, coord y)
1081 struct emp_qelem *qp;
1084 for (qp = airp->q_forw; qp != airp; qp = qp->q_forw) {
1085 a = (struct airport *)qp;
1086 if ((a->x == x) && (a->y == y))
1093 /* #*# This needs to be changed to include acc's -KHS */
1095 add_airport(struct emp_qelem *airp, coord x, coord y)
1100 a = malloc(sizeof(struct airport));
1104 getsect(x, y, §);
1105 a->own = sect.sct_own;
1107 emp_insque((struct emp_qelem *)a, airp);
1111 * Take all the planes in list 1 that
1112 * are at x,y, and put them into list 2.
1115 divide(struct emp_qelem *l1, struct emp_qelem *l2, coord x, coord y)
1117 struct emp_qelem *qp, *next;
1120 for (qp = l1->q_forw; qp != l1; qp = next) {
1122 plp = (struct plist *)qp;
1124 if (plp->plane.pln_x != x)
1126 if (plp->plane.pln_y != y)
1135 air_damage(struct emp_qelem *bombers, coord x, coord y, int mission,
1136 natid victim, char *s, int hardtarget)
1138 struct emp_qelem *qp;
1141 int newdam, dam = 0;
1145 for (qp = bombers->q_forw; qp != bombers; qp = qp->q_forw) {
1146 plp = (struct plist *)qp;
1149 if ((mission == MI_SINTERDICT) && !(plp->pcp->pl_flags & P_A))
1156 if (plp->pcp->pl_flags & P_A) {
1157 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
1159 "\t%s detects sub movement in %s\n",
1160 prplane(pp), xyas(x, y, pp->pln_own));
1163 if (getrel(getnatp(pp->pln_own), victim) > HOSTILE) {
1165 "\t%s tracks %s %s at %s\n",
1166 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1170 "\t%s depth-charging %s %s in %s\n",
1171 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1174 "\t%s pinbombing %s %s in %s\n",
1175 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1177 hitchance = pln_hitchance(pp, hardtarget, EF_SHIP);
1178 if (plp->plane.pln_nuketype != -1)
1180 else if (hardtarget != SECT_HARDTARGET)
1181 wu(0, pp->pln_own, "\t\t%d%% hitchance...", hitchance);
1182 /* Always calculate damage */
1183 if (roll(100) <= hitchance) {
1184 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
1186 if (mission == MI_INTERDICT) {
1188 "\t\tnuclear warhead on plane %s does %d damage to %s %s\n",
1189 prplane(pp), nukedam, cname(victim), s);
1194 "\t\thit %s %s for %d damage\n",
1195 cname(victim), s, newdam);
1199 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
1200 wu(0, pp->pln_own, "missed\n");
1201 if (mission == MI_SINTERDICT) {
1203 "RUMBLE... your sub in %s hears a depth-charge explode nearby\n",
1204 xyas(x, y, victim));
1205 } else if (*s == 's') {
1206 mpr(victim, "SPLASH! Bombs miss your %s in %s\n",
1207 s, xyas(x, y, victim));
1209 mpr(victim, "SPLAT! Bombs miss your %s in %s\n",
1210 s, xyas(x, y, victim));
1212 /* Now, even though we missed, the bombs
1214 collateral_damage(x, y, newdam);
1217 /* use up missiles */
1218 if (plp->pcp->pl_flags & P_M)
1226 * Check to see if anyone hostile to the victim
1227 * is running an air defense mission on this
1228 * sector. If so, do air combat
1231 air_defense(coord x, coord y, natid victim, struct emp_qelem *bomb_list,
1232 struct emp_qelem *esc_list)
1235 int mission_flags, combat = 0, rel, dist, z;
1236 struct emp_qelem *qp, interceptors, airp, i, empty, *next;
1238 struct genlist *glp;
1240 struct genlist mi[MAXNOC];
1247 for (qp = bomb_list->q_forw; qp != bomb_list; qp = qp->q_forw)
1249 for (qp = esc_list->q_forw; qp != esc_list; qp = qp->q_forw)
1252 memset(mi, 0, sizeof(mi));
1253 for (z = 1; z < MAXNOC; z++)
1254 emp_initque((struct emp_qelem *)&mi[z]);
1256 build_mission_list_type(mi, x, y, MI_AIR_DEFENSE, EF_PLANE, victim);
1258 for (cn = 1; cn < MAXNOC; cn++) {
1259 /* Check our relations */
1260 rel = getrel(getnatp(cn), victim);
1265 if (QEMPTY(&mi[cn].queue))
1268 /* Ok, make a list of all the interceptors. Note that this *copies* the
1269 * list from the mission creation. This list must be deleted later. */
1270 emp_initque(&interceptors);
1271 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1273 glp = (struct genlist *)qp;
1275 if (CANT_HAPPEN(gp->ef_type != EF_PLANE))
1278 dist = mapdist(x, y, gp->x, gp->y);
1280 plp = malloc(sizeof(struct plist));
1281 memset(plp, 0, sizeof(struct plist));
1283 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
1285 /* missiles go one way, so we can use all the range */
1286 if (!(plp->pcp->pl_flags & P_M))
1288 /* If it's out of range, free it and continue on */
1289 if (dist > plp->plane.pln_range) {
1293 emp_insque(&plp->queue, &interceptors);
1296 /* Remove those who cannot go */
1297 mission_pln_sel(&interceptors, P_F, 0, SECT_HARDTARGET);
1299 if (QEMPTY(&interceptors))
1302 /* Now, delete all the extras, but delete the first ones, not the last ones, so
1303 * that the higher numbered planes go into battle (they should be the better ones
1304 * at fighting, if all went well.) */
1306 for (qp = interceptors.q_forw; qp != (&interceptors);
1309 tcount -= count * 2;
1310 /* Just in case there are more incoming than we have */
1313 for (qp = interceptors.q_forw; qp != (&interceptors); qp = next) {
1317 /* Free it up and continue */
1319 glp = (struct genlist *)qp;
1324 /* Now, make a list of all the airports these planes are coming from */
1326 for (qp = interceptors.q_forw; qp != (&interceptors);
1328 plp = (struct plist *)qp;
1329 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
1330 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
1333 /* Now, fly them out one airport at a time */
1334 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
1335 struct airport *air;
1337 air = (struct airport *)qp;
1338 dist = mapdist(x, y, air->x, air->y);
1342 /* Split off the interceptors at this base into i */
1343 divide(&interceptors, &i, air->x, air->y);
1346 mission_flags |= P_X; /* stealth (shhh) */
1347 /* gets turned off if not all choppers */
1348 mission_flags |= P_H;
1349 sam_intercept(bomb_list, &i, cn, victim, x, y, 0);
1350 sam_intercept(esc_list, &i, cn, victim, x, y, 1);
1352 /* Did we run out of interceptors? */
1355 /* Did we run out of bombers? */
1356 if (QEMPTY(bomb_list)) {
1357 /* Yes, so we have to put the rest of the interceptors back, and
1358 then continue, or we leak memory */
1363 mission_pln_arm(&i, air->x, air->y, 2 * dist, 0, 0, P_F,
1366 /* Did we run out of interceptors? */
1369 /* Did we run out of bombers? */
1370 if (QEMPTY(bomb_list)) {
1371 /* Yes, so we have to put the rest of the interceptors back, and
1372 then continue, or we leak memory */
1377 path = BestAirPath(buf, air->x, air->y, x, y);
1378 if (CANT_HAPPEN(!path)) {
1382 wu(0, cn, "Flying %s mission from %s\n",
1383 mission_name(MI_AIR_DEFENSE), xyas(air->x, air->y, cn));
1384 if (air->own && (air->own != cn)) {
1385 wu(0, air->own, "%s is flying %s mission from %s\n",
1386 cname(cn), mission_name(MI_AIR_DEFENSE),
1387 xyas(air->x, air->y, air->own));
1390 /* Now, fly the planes to the sector */
1391 emp_initque(&empty);
1392 ac_encounter(&i, &empty, air->x, air->y,
1393 path, mission_flags, 1);
1395 /* If none made it, continue */
1399 /* Some made it, so now they get to try to fight. */
1400 /* Intercept the escorts first */
1402 if (!QEMPTY(esc_list)) {
1403 mpr(victim, "%s air defense planes intercept!\n",
1405 ac_combat_headers(victim, cn);
1406 ac_airtoair(esc_list, &i);
1409 /* Now intercept the bombers */
1410 if (!QEMPTY(bomb_list)) {
1412 mpr(victim, "%s air defense planes intercept!\n",
1414 ac_combat_headers(victim, cn);
1416 ac_airtoair(bomb_list, &i);
1423 if (CANT_HAPPEN(!QEMPTY(&interceptors)))
1424 pln_put(&interceptors);
1427 /* We have to free all of these, if they are still there, otherwise they get
1428 lost and we leak memory all over the place. */
1429 for (cn = 1; cn < MAXNOC; cn++) {
1430 /* free up all this memory if it's still there */
1431 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1433 glp = (struct genlist *)qp;