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, 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, 0);
117 collateral_damage(coord x, coord y, int dam, struct emp_qelem *list)
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, list);
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, 0);
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 player->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 player->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, tech;
412 natid plane_owner = 0;
413 int md, range, air_dam = 0;
414 double prb, hitchance, vrange;
416 getsect(x, y, §);
418 emp_initque(&missiles);
419 emp_initque(&bombers);
420 emp_initque(&escorts);
423 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
424 glp = (struct genlist *)qp;
427 md = mapdist(x, y, gp->x, gp->y);
429 if (glp->thing->ef_type == EF_LAND) {
430 lp = (struct lndstr *)glp->thing;
432 if (mission == MI_SINTERDICT)
435 if ((mission == MI_INTERDICT) &&
436 (md > land_max_interdiction_range))
439 range = roundrange(lnd_fire_range(lp));
444 putland(lp->lnd_uid, lp);
448 if (sect.sct_type == SCT_WATER) {
449 if (chance(lp->lnd_acc / 100.0))
450 dam2 = ldround(dam2 / 2.0, 1);
453 if (sect.sct_type == SCT_WATER)
454 nreport(lp->lnd_own, N_SHP_SHELL, victim, 1);
456 nreport(lp->lnd_own, N_SCT_SHELL, victim, 1);
458 "%s fires at %s %s at %s\n",
459 prland(lp), cname(victim), s, xyas(x, y, lp->lnd_own));
461 mpr(victim, "%s %s fires at you at %s\n",
462 cname(lp->lnd_own), prland(lp), xyas(x, y, victim));
463 } else if (glp->thing->ef_type == EF_SHIP) {
464 sp = (struct shpstr *)glp->thing;
467 if (((mission == MI_INTERDICT) ||
468 (mission == MI_SINTERDICT)) &&
469 (md > ship_max_interdiction_range))
472 if ((mcp->m_flags & M_SUB) &&
473 (sect.sct_type != SCT_WATER))
476 if (mission == MI_SINTERDICT) {
477 if (!(mcp->m_flags & M_SONAR))
479 if (!(mcp->m_flags & M_DCH) && !(mcp->m_flags & M_SUBT))
481 vrange = techfact(sp->shp_tech, mcp->m_vrnge);
482 vrange *= sp->shp_effic / 200.0;
485 /* can't look all the time */
489 if (mcp->m_flags & M_SUB) {
490 /* If we aren't shooting at "subs" or "ships" don't fire at all from
494 range = roundrange(torprange(sp));
497 if (!line_of_sight(NULL, x, y, gp->x, gp->y))
499 dam2 = shp_torp(sp, 1);
500 putship(sp->shp_uid, sp);
503 hitchance = shp_torp_hitchance(sp, md);
506 "%s locking on %s %s in %s\n",
507 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
509 "\tEffective torpedo range is %d.0\n", range);
511 "\tWhooosh... Hitchance = %d%%\n",
512 (int)(hitchance * 100));
514 if (!chance(hitchance)) {
515 wu(0, sp->shp_own, "\tMissed\n");
517 "Incoming torpedo sighted @ %s missed (whew)!\n",
521 wu(0, sp->shp_own, "\tBOOM!...\n");
523 nreport(victim, N_TORP_SHIP, 0, 1);
525 "\tTorpedo hit %s %s for %d damage\n",
526 cname(victim), s, dam2);
529 "Incoming torpedo sighted @ %s hits and does %d damage!\n",
530 xyas(x, y, victim), dam2);
532 range = roundrange(shp_fire_range(sp));
535 if (mission == MI_SINTERDICT)
536 dam2 = shp_dchrg(sp);
539 putship(sp->shp_uid, sp);
545 prb = (double)md / range;
550 if (sect.sct_type == SCT_WATER)
551 nreport(sp->shp_own, N_SHP_SHELL, victim, 1);
553 nreport(sp->shp_own, N_SCT_SHELL, victim, 1);
555 "%s fires at %s %s at %s\n",
556 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
558 mpr(victim, "%s %s fires at you at %s\n",
559 cname(sp->shp_own), prship(sp), xyas(x, y, victim));
561 } else if (glp->thing->ef_type == EF_PLANE) {
563 if (pcp->pl_flags & P_M)
564 /* units have their own missile interdiction */
565 if (hardtarget != SECT_HARDTARGET || pcp->pl_flags & P_MAR)
568 /* save planes for later */
569 plp = malloc(sizeof(struct plist));
571 memset(plp, 0, sizeof(struct plist));
573 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
574 if (plp->pcp->pl_flags & P_M)
575 emp_insque(&plp->queue, &missiles);
577 emp_insque(&plp->queue, &bombers);
578 plane_owner = plp->plane.pln_own;
584 if (!QEMPTY(&missiles)) {
585 /* I arbitrarily chose 100 mindam -KHS */
587 msl_launch_mindam(&missiles, x, y, hardtarget, EF_SECTOR, 100,
588 "sector", victim, mission);
589 qp = missiles.q_forw;
590 while (qp != (&missiles)) {
598 if (QEMPTY(&bombers)) {
601 glp = (struct genlist *)qp;
610 * If there are planes performing an
611 * interdict or support mission, find
612 * some escorts for them, if possible.
613 * Up to 2 per bomber, if possible.
615 find_escorts(x, y, plane_owner, &escorts);
617 if (mission == MI_SINTERDICT)
618 mission_pln_sel(&bombers, P_T | P_A, 0, hardtarget);
620 mission_pln_sel(&bombers, P_T, P_A, SECT_HARDTARGET);
622 mission_pln_sel(&escorts, P_ESC | P_F, 0, SECT_HARDTARGET);
624 for (qp = bombers.q_forw; qp != (&bombers); qp = qp->q_forw) {
625 plp = (struct plist *)qp;
626 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
627 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
630 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
635 air = (struct airport *)qp;
636 md = mapdist(x, y, air->x, air->y);
641 /* Split off the bombers at this base into b */
642 divide(&bombers, &b, air->x, air->y);
644 /* Split off the escorts at this base into e */
645 divide(&escorts, &e, air->x, air->y);
649 mission_flags |= P_X; /* stealth (shhh) */
650 mission_flags |= P_H; /* gets turned off if not all choppers */
652 mission_flags = mission_pln_arm(&b, air->x, air->y, 2 * md, 'p', 0,
653 0, mission_flags, &tech);
658 mission_flags = mission_pln_arm(&e, air->x, air->y, 2 * md, 'p', 0,
659 P_F | P_ESC, mission_flags, &tech);
661 pp = BestAirPath(buf, air->x, air->y, x, y);
662 if (CANT_HAPPEN(!pp))
664 wu(0, plane_owner, "Flying %s mission from %s\n",
665 mission_name(mission), xyas(air->x, air->y, plane_owner));
666 if (air->own && (air->own != plane_owner)) {
667 wu(0, air->own, "%s is flying %s mission from %s\n",
668 cname(plane_owner), mission_name(mission),
669 xyas(air->x, air->y, air->own));
672 ac_encounter(&b, &e, air->x, air->y, pp, mission_flags, 0, 0, 0);
676 air_damage(&b, x, y, mission, victim, s, hardtarget);
684 if (sect.sct_type == SCT_WATER)
685 nreport(plane_owner, N_SHP_BOMB, victim, 1);
687 nreport(plane_owner, N_SCT_BOMB, victim, 1);
690 /* free up all this memory */
693 glp = (struct genlist *)qp;
701 while (qp != (&escorts)) {
709 while (qp != (&bombers)) {
720 cando(int mission, int type)
724 if (type == EF_PLANE)
728 if (type == EF_PLANE)
732 if ((type == EF_PLANE) || (type == EF_SHIP))
740 if (type == EF_PLANE)
753 mission_name(short mission)
757 return "an interdiction";
761 return "a offensive support";
763 return "a defensive support";
769 return "a sub interdiction";
771 return "an air defense";
773 return "a mysterious";
777 show_mission(int type, struct nstr_item *np)
779 int first = 1, radius;
780 union empobj_storage item;
783 while (nxtitem(np, &item)) {
784 gp = (struct empobj *)&item;
785 if (!player->owner || gp->own == 0)
789 pr("Thing x,y op-sect rad mission\n");
792 pr("%-25s", obj_nameof(gp));
793 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
794 if (gp->mission == MI_INTERDICT || gp->mission == MI_SUPPORT ||
795 gp->mission == MI_OSUPPORT ||
796 gp->mission == MI_DSUPPORT || gp->mission == MI_AIR_DEFENSE) {
798 oprange(gp, &radius);
799 prxy(" %3d,%-3d", gp->opx, gp->opy, player->cnum);
800 if (radius < gp->radius)
803 pr(" %4d", gp->radius);
804 } else if (gp->mission == MI_RESERVE) {
808 getsect(gp->x, gp->y, §);
809 if ((sect.sct_type == SCT_HEADQ) && (sect.sct_effic >= 60))
812 if (item.land.lnd_rad_max == 0)
815 plus += item.land.lnd_rad_max;
816 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
818 } else if (gp->mission == MI_ESCORT) {
820 pr(" %4d", item.plane.pln_range / 2);
824 pr(" is on %s mission\n", mission_name(gp->mission));
826 pr(" has no mission.\n");
831 oprange(struct empobj *gp, int *radius)
835 switch (gp->ef_type) {
837 range = ldround(shp_fire_range((struct shpstr *)gp), 1);
840 range = ldround(lnd_fire_range((struct lndstr *)gp), 1);
843 /* missiles go one way, so we can use all the range */
844 if (plchr[(int)gp->type].pl_flags & P_M)
845 range = ((struct plnstr *)gp)->pln_range;
847 range = ((struct plnstr *)gp)->pln_range / 2;
861 * Remove all planes who cannot go on
862 * the mission from the plane list.
865 mission_pln_sel(struct emp_qelem *list, int wantflags, int nowantflags,
868 struct emp_qelem *qp, *next;
870 struct plchrstr *pcp;
873 for (qp = list->q_forw; qp != list; qp = next) {
875 plp = (struct plist *)qp;
879 if (pp->pln_effic < 40) {
885 if (pp->pln_mobil < 1) {
892 if (ontradingblock(EF_PLANE, pp)) {
899 if (!pln_capable(pp, wantflags, nowantflags)) {
905 if (!pln_airbase_ok(pp, 0, 0)) {
911 if (pcp->pl_flags & P_A) {
912 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
919 putplane(pp->pln_uid, pp);
924 * Arm only the planes at x,y
927 mission_pln_arm(struct emp_qelem *list, coord x, coord y, int dist,
928 int mission, struct ichrstr *ip, int flags,
929 int mission_flags, int *tech)
931 struct emp_qelem *qp;
932 struct emp_qelem *next;
937 for (qp = list->q_forw; qp != list; qp = next) {
939 plp = (struct plist *)qp;
941 if (plp->plane.pln_x != x)
943 if (plp->plane.pln_y != y)
946 if (mission_pln_equip(plp, ip, flags, mission) < 0) {
951 if (flags & (P_S | P_I)) {
952 if (plp->pcp->pl_flags & P_S)
953 mission_flags |= P_S;
954 if (plp->pcp->pl_flags & P_I)
955 mission_flags |= P_I;
957 if (*tech > plp->plane.pln_tech)
958 *tech = plp->plane.pln_tech;
959 if (!(plp->pcp->pl_flags & P_H))
960 /* no stealth on this mission */
961 mission_flags &= ~P_H;
962 if (!(plp->pcp->pl_flags & P_X))
963 /* no stealth on this mission */
964 mission_flags &= ~P_X;
965 if (!(plp->pcp->pl_flags & P_A)) {
966 /* no asw on this mission */
967 mission_flags &= ~P_A;
969 if (!(plp->pcp->pl_flags & P_MINE)) {
970 /* no asw on this mission */
971 mission_flags &= ~P_MINE;
975 * Mob costs for missions are 1/2 normal
978 /* plp->plane.pln_mobil -= pln_mobcost(dist,&plp->plane,flags)/2;*/
979 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
982 return mission_flags;
986 mission_pln_equip(struct plist *plp, struct ichrstr *ip, int flags,
989 struct plchrstr *pcp;
1001 if (pp->pln_ship >= 0) {
1002 getship(pp->pln_ship, &ship);
1003 item = ship.shp_item;
1004 } else if (pp->pln_land >= 0) {
1005 getland(pp->pln_land, &land);
1006 item = land.lnd_item;
1008 getsect(pp->pln_x, pp->pln_y, §);
1009 item = sect.sct_item;
1011 if (pcp->pl_fuel > item[I_PETROL]) {
1014 item[I_PETROL] -= pcp->pl_fuel;
1016 if (!(flags & P_F)) {
1017 load = pln_load(pp);
1023 if (pp->pln_nuketype == -1) {
1029 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1032 needed = (load * 2) / ip->i_lbs;
1035 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1038 needed = (load * 2) / ip->i_lbs;
1041 if ((pcp->pl_flags & (P_V | P_C)) == 0)
1044 needed = load / ip->i_lbs;
1047 if (pp->pln_nuketype == -1)
1050 case 'i': /* missile interception */
1059 if (rval < 0 || (itype != I_NONE && needed <= 0)) {
1062 if (itype != I_NONE) {
1063 if (itype == I_SHELL && item[itype] < needed)
1064 item[itype] += supply_commod(plp->plane.pln_own,
1068 if (item[itype] < needed)
1070 item[itype] -= needed;
1072 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
1073 plp->bombs = needed;
1077 if (pp->pln_ship >= 0)
1078 putship(ship.shp_uid, &ship);
1079 else if (pp->pln_land >= 0)
1080 putland(land.lnd_uid, &land);
1087 * Return 1 if this x,y pair is in the list
1090 find_airport(struct emp_qelem *airp, coord x, coord y)
1092 struct emp_qelem *qp;
1095 for (qp = airp->q_forw; qp != airp; qp = qp->q_forw) {
1096 a = (struct airport *)qp;
1097 if ((a->x == x) && (a->y == y))
1104 /* #*# This needs to be changed to include acc's -KHS */
1106 add_airport(struct emp_qelem *airp, coord x, coord y)
1111 a = malloc(sizeof(struct airport));
1115 getsect(x, y, §);
1116 a->own = sect.sct_own;
1118 emp_insque((struct emp_qelem *)a, airp);
1122 * Take all the planes in list 1 that
1123 * are at x,y, and put them into list 2.
1126 divide(struct emp_qelem *l1, struct emp_qelem *l2, coord x, coord y)
1128 struct emp_qelem *qp, *next;
1131 for (qp = l1->q_forw; qp != l1; qp = next) {
1133 plp = (struct plist *)qp;
1135 if (plp->plane.pln_x != x)
1137 if (plp->plane.pln_y != y)
1146 air_damage(struct emp_qelem *bombers, coord x, coord y, int mission,
1147 natid victim, char *s, int hardtarget)
1149 struct emp_qelem *qp;
1152 int newdam, dam = 0;
1156 for (qp = bombers->q_forw; qp != bombers; qp = qp->q_forw) {
1157 plp = (struct plist *)qp;
1160 if ((mission == MI_SINTERDICT) && !(plp->pcp->pl_flags & P_A))
1167 if (plp->pcp->pl_flags & P_A) {
1168 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
1170 "\t%s detects sub movement in %s\n",
1171 prplane(pp), xyas(x, y, pp->pln_own));
1174 if (getrel(getnatp(pp->pln_own), victim) > HOSTILE) {
1176 "\t%s tracks %s %s at %s\n",
1177 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1181 "\t%s depth-charging %s %s in %s\n",
1182 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1185 "\t%s pinbombing %s %s in %s\n",
1186 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1188 hitchance = pln_hitchance(pp, hardtarget, EF_SHIP);
1189 if (plp->plane.pln_nuketype != -1)
1191 else if (hardtarget != SECT_HARDTARGET)
1192 wu(0, pp->pln_own, "\t\t%d%% hitchance...", hitchance);
1193 /* Always calculate damage */
1194 if (roll(100) <= hitchance) {
1195 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
1197 if (mission == MI_INTERDICT) {
1199 "\t\tnuclear warhead on plane %s does %d damage to %s %s\n",
1200 prplane(pp), nukedam, cname(victim), s);
1205 "\t\thit %s %s for %d damage\n",
1206 cname(victim), s, newdam);
1210 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
1211 wu(0, pp->pln_own, "missed\n");
1212 if (mission == MI_SINTERDICT) {
1214 "RUMBLE... your sub in %s hears a depth-charge explode nearby\n",
1215 xyas(x, y, victim));
1216 } else if (*s == 's') {
1217 mpr(victim, "SPLASH! Bombs miss your %s in %s\n",
1218 s, xyas(x, y, victim));
1220 mpr(victim, "SPLAT! Bombs miss your %s in %s\n",
1221 s, xyas(x, y, victim));
1223 /* Now, even though we missed, the bombs
1225 collateral_damage(x, y, newdam, bombers);
1228 /* use up missiles */
1229 if (plp->pcp->pl_flags & P_M)
1237 * Check to see if anyone hostile to the victim
1238 * is running an air defense mission on this
1239 * sector. If so, do air combat
1242 air_defense(coord x, coord y, natid victim, struct emp_qelem *bomb_list,
1243 struct emp_qelem *esc_list)
1246 int mission_flags, tech, combat = 0, rel, dist, z;
1247 struct emp_qelem *qp, interceptors, airp, i, empty, *next;
1249 struct genlist *glp;
1251 struct genlist mi[MAXNOC];
1258 for (qp = bomb_list->q_forw; qp != bomb_list; qp = qp->q_forw)
1260 for (qp = esc_list->q_forw; qp != esc_list; qp = qp->q_forw)
1263 memset(mi, 0, sizeof(mi));
1264 for (z = 1; z < MAXNOC; z++)
1265 emp_initque((struct emp_qelem *)&mi[z]);
1267 build_mission_list_type(mi, x, y, MI_AIR_DEFENSE, EF_PLANE, victim);
1269 for (cn = 1; cn < MAXNOC; cn++) {
1270 /* Check our relations */
1271 rel = getrel(getnatp(cn), victim);
1276 if (QEMPTY(&mi[cn].queue))
1279 /* Ok, make a list of all the interceptors. Note that this *copies* the
1280 * list from the mission creation. This list must be deleted later. */
1281 emp_initque(&interceptors);
1282 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1284 glp = (struct genlist *)qp;
1286 if (CANT_HAPPEN(gp->ef_type != EF_PLANE))
1289 dist = mapdist(x, y, gp->x, gp->y);
1291 plp = malloc(sizeof(struct plist));
1292 memset(plp, 0, sizeof(struct plist));
1294 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
1296 /* missiles go one way, so we can use all the range */
1297 if (!(plp->pcp->pl_flags & P_M))
1299 /* If it's out of range, free it and continue on */
1300 if (dist > plp->plane.pln_range) {
1304 emp_insque(&plp->queue, &interceptors);
1307 /* Remove those who cannot go */
1308 mission_pln_sel(&interceptors, P_F, 0, SECT_HARDTARGET);
1310 if (QEMPTY(&interceptors))
1313 /* Now, delete all the extras, but delete the first ones, not the last ones, so
1314 * that the higher numbered planes go into battle (they should be the better ones
1315 * at fighting, if all went well.) */
1317 for (qp = interceptors.q_forw; qp != (&interceptors);
1320 tcount -= count * 2;
1321 /* Just in case there are more incoming than we have */
1324 for (qp = interceptors.q_forw; qp != (&interceptors); qp = next) {
1328 /* Free it up and continue */
1330 glp = (struct genlist *)qp;
1335 /* Now, make a list of all the airports these planes are coming from */
1337 for (qp = interceptors.q_forw; qp != (&interceptors);
1339 plp = (struct plist *)qp;
1340 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
1341 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
1344 /* Now, fly them out one airport at a time */
1345 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
1346 struct airport *air;
1348 air = (struct airport *)qp;
1349 dist = mapdist(x, y, air->x, air->y);
1353 /* Split off the interceptors at this base into i */
1354 divide(&interceptors, &i, air->x, air->y);
1358 mission_flags |= P_X; /* stealth (shhh) */
1359 /* gets turned off if not all choppers */
1360 mission_flags |= P_H;
1361 sam_intercept(bomb_list, &i, cn, victim, x, y, 0);
1362 sam_intercept(esc_list, &i, cn, victim, x, y, 1);
1364 /* Did we run out of interceptors? */
1367 /* Did we run out of bombers? */
1368 if (QEMPTY(bomb_list)) {
1369 /* Yes, so we have to put the rest of the interceptors back, and
1370 then continue, or we leak memory */
1375 mission_pln_arm(&i, air->x, air->y, 2 * dist, 'r', 0, P_F,
1376 mission_flags, &tech);
1378 /* Did we run out of interceptors? */
1381 /* Did we run out of bombers? */
1382 if (QEMPTY(bomb_list)) {
1383 /* Yes, so we have to put the rest of the interceptors back, and
1384 then continue, or we leak memory */
1389 path = BestAirPath(buf, air->x, air->y, x, y);
1390 if (CANT_HAPPEN(!path))
1392 wu(0, cn, "Flying %s mission from %s\n",
1393 mission_name(MI_AIR_DEFENSE), xyas(air->x, air->y, cn));
1394 if (air->own && (air->own != cn)) {
1395 wu(0, air->own, "%s is flying %s mission from %s\n",
1396 cname(cn), mission_name(MI_AIR_DEFENSE),
1397 xyas(air->x, air->y, air->own));
1400 /* Now, fly the planes to the sector */
1401 emp_initque(&empty);
1402 ac_encounter(&i, &empty, air->x, air->y,
1403 path, mission_flags, 1, bomb_list, esc_list);
1405 /* If none made it, continue */
1409 /* Some made it, so now they get to try to fight. */
1410 /* Intercept the escorts first */
1412 if (!QEMPTY(esc_list)) {
1413 mpr(victim, "%s air defense planes intercept!\n",
1415 ac_combat_headers(victim, cn);
1416 ac_airtoair(esc_list, &i);
1419 /* Now intercept the bombers */
1420 if (!QEMPTY(bomb_list)) {
1422 mpr(victim, "%s air defense planes intercept!\n",
1424 ac_combat_headers(victim, cn);
1426 ac_airtoair(bomb_list, &i);
1435 /* We have to free all of these, if they are still there, otherwise they get
1436 lost and we leak memory all over the place. */
1437 for (cn = 1; cn < MAXNOC; cn++) {
1438 /* free up all this memory if it's still there */
1439 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1441 glp = (struct genlist *)qp;