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
48 #include "prototypes.h"
53 struct emp_qelem queue; /* list of units */
54 void *cp; /* pointer to desc of thing */
55 struct empobj *thing; /* thing's struct */
59 struct emp_qelem queue;
64 static void add_airport(struct emp_qelem *, coord, coord);
65 static int air_damage(struct emp_qelem *, coord, coord, int, natid,
67 static void build_mission_list(struct genlist *, coord, coord, int, natid);
68 static void build_mission_list_type(struct genlist *, coord, coord, int,
70 static void divide(struct emp_qelem *, struct emp_qelem *, coord, coord);
71 static int dosupport(struct genlist *, coord, coord, natid, natid);
72 static int find_airport(struct emp_qelem *, coord, coord);
73 static int mission_pln_arm(struct emp_qelem *, coord, coord, int,
74 int, struct ichrstr *, int, int, int *);
75 static void mission_pln_sel(struct emp_qelem *, int, int, int);
76 static int perform_mission(coord, coord, natid, struct emp_qelem *, int,
80 * Interdict commodities & transported planes
83 ground_interdict(coord x, coord y, natid victim, char *s)
86 int dam = 0, newdam, rel;
87 struct genlist mi[MAXNOC];
90 memset(mi, 0, sizeof(mi));
91 for (z = 1; z < MAXNOC; z++)
92 emp_initque((struct emp_qelem *)&mi[z]);
94 build_mission_list(mi, x, y, MI_INTERDICT, victim);
96 for (cn = 1; cn < MAXNOC; cn++) {
97 rel = getrel(getnatp(cn), victim);
101 if (QEMPTY(&mi[cn].queue))
104 newdam = perform_mission(x, y, victim, &mi[cn].queue,
105 MI_INTERDICT, s, SECT_HARDTARGET);
108 mpr(victim, "%s interdiction mission does %d damage!\n",
112 collateral_damage(x, y, dam, 0);
118 collateral_damage(coord x, coord y, int dam, struct emp_qelem *list)
126 getsect(x, y, §);
128 coll = ldround((double)dam * collateral_dam, 1);
131 mpr(sect.sct_own, "%s takes %d%% collateral damage\n",
132 xyas(x, y, sect.sct_own), coll);
133 sectdamage(§, coll, list);
141 only_subs(struct emp_qelem *list)
143 struct emp_qelem *qp;
147 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
148 glp = (struct genlist *)qp;
150 if (glp->thing->ef_type != EF_SHIP)
153 if (!(mcp->m_flags & M_SUB))
157 /* They were all subs! */
163 * Interdict ships & land units
166 unit_interdict(coord x, coord y, natid victim, char *s, int hardtarget,
171 struct genlist mi[MAXNOC];
175 memset(mi, 0, sizeof(mi));
176 for (z = 1; z < MAXNOC; z++)
177 emp_initque((struct emp_qelem *)&mi[z]);
179 build_mission_list(mi, x, y, mission, victim);
181 for (cn = 1; cn < MAXNOC; cn++) {
184 if (mission == MI_SINTERDICT) {
185 if (getrel(getnatp(cn), victim) >= FRIENDLY)
187 } else if (getrel(getnatp(cn), victim) > HOSTILE)
190 if (QEMPTY(&mi[cn].queue))
193 osubs = only_subs(&mi[cn].queue);
194 newdam = perform_mission(x, y, victim, &mi[cn].queue,
195 mission, s, hardtarget);
198 /* If only subs responded, then we don't know who's
200 mpr(victim, "%s interdiction mission does %d damage!\n",
201 osubs ? "Enemy" : cname(cn), newdam);
205 collateral_damage(x, y, dam, 0);
211 * Perform a mission against victim, on behalf of actee
214 off_support(coord x, coord y, natid victim, natid actee)
217 struct genlist mi[MAXNOC];
220 memset(mi, 0, sizeof(mi));
221 for (z = 1; z < MAXNOC; z++)
222 emp_initque((struct emp_qelem *)&mi[z]);
224 build_mission_list(mi, x, y, MI_SUPPORT, victim);
225 build_mission_list(mi, x, y, MI_OSUPPORT, victim);
227 dam = dosupport(mi, x, y, victim, actee);
232 * Perform a mission against victim, on behalf of actee
235 def_support(coord x, coord y, natid victim, natid actee)
238 struct genlist mi[MAXNOC];
241 memset(mi, 0, sizeof(mi));
242 for (z = 1; z < MAXNOC; z++)
243 emp_initque((struct emp_qelem *)&mi[z]);
245 build_mission_list(mi, x, y, MI_SUPPORT, victim);
246 build_mission_list(mi, x, y, MI_DSUPPORT, victim);
248 dam = dosupport(mi, x, y, victim, actee);
253 dosupport(struct genlist *mi, coord x, coord y, natid victim, natid actee)
259 for (cn = 1; cn < MAXNOC; cn++) {
260 rel = getrel(getnatp(cn), actee);
261 if ((cn != actee) && (rel != ALLIED))
263 rel = getrel(getnatp(cn), victim);
264 if ((cn != actee) && (rel != AT_WAR))
267 if (QEMPTY(&mi[cn].queue))
270 dam += perform_mission(x, y, victim, &mi[cn].queue, MI_SUPPORT,
271 "", SECT_HARDTARGET);
277 build_mission_list(struct genlist *mi, coord x, coord y, int mission,
280 build_mission_list_type(mi, x, y, mission, EF_LAND, victim);
281 build_mission_list_type(mi, x, y, mission, EF_SHIP, victim);
282 build_mission_list_type(mi, x, y, mission, EF_PLANE, victim);
286 build_mission_list_type(struct genlist *mi, coord x, coord y, int mission,
287 int type, natid victim)
292 union empobj_storage item;
298 snxtitem_all(&ni, type);
299 while (nxtitem(&ni, &item)) {
300 gp = (struct empobj *)&item;
308 if ((gp->mission != mission) && (mission != MI_SINTERDICT))
311 if ((gp->mission != mission) && (mission == MI_SINTERDICT) &&
312 (gp->mission != MI_INTERDICT))
315 relat = getrel(getnatp(gp->own), victim);
316 if (mission == MI_SINTERDICT) {
317 if (relat >= FRIENDLY)
319 else if (type != EF_PLANE && relat > HOSTILE)
321 } else if (relat > HOSTILE)
324 dist = mapdist(x, y, gp->opx, gp->opy);
327 if (mission != MI_RESERVE) /* XXX */
328 oprange(gp, &radius);
333 /* Ok, it is within the operations range. */
334 /* Now check from where the object actually is */
335 dist = mapdist(x, y, gp->x, gp->y);
337 oprange(gp, &radius);
340 /* Ok, the object can get to where the x,y is */
343 if (mission != MI_AIR_DEFENSE) {
344 getsect(x, y, §);
345 if (getrel(getnatp(gp->own), sect.sct_own) > AT_WAR) {
348 * If the player->owner of the unit isn't at war
349 * with the victim, and doesn't own the
350 * sect being acted upon, and isn't the
351 * old player->owner of that sect, bounce them.
353 if (sect.sct_type != SCT_WATER &&
354 sect.sct_own != gp->own &&
355 sect.sct_oldown != gp->own)
361 glp = malloc(sizeof(struct genlist));
362 memset(glp, 0, sizeof(struct genlist));
363 glp->cp = get_empobj_chr(gp);
364 glp->thing = malloc(sizeof(item));
365 memcpy(glp->thing, &item, sizeof(item));
366 emp_insque(&glp->queue, &mi[gp->own].queue);
371 find_escorts(coord x, coord y, natid cn, struct emp_qelem *escorts)
378 snxtitem_all(&ni, EF_PLANE);
379 while (nxtitem(&ni, &plane)) {
380 if (plane.pln_own != cn)
383 if (plane.pln_mission != MI_ESCORT)
386 dist = mapdist(x, y, plane.pln_x, plane.pln_y);
387 if (dist > plane.pln_range / 2)
390 plp = malloc(sizeof(struct plist));
391 memset(plp, 0, sizeof(struct plist));
392 plp->pcp = &plchr[(int)plane.pln_type];
394 emp_insque(&plp->queue, escorts);
399 perform_mission(coord x, coord y, natid victim, struct emp_qelem *list,
400 int mission, char *s, int hardtarget)
402 struct emp_qelem *qp, missiles, bombers, escorts, airp, b, e;
403 struct emp_qelem *newqp;
411 struct plchrstr *pcp;
412 int dam = 0, dam2, mission_flags, tech;
413 natid plane_owner = 0;
414 int gun, shell, md, range, air_dam = 0;
415 double prb, hitchance, vrange;
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 (lp->lnd_effic < LAND_MINFIREEFF)
436 if (mission == MI_SINTERDICT)
439 if ((mission == MI_INTERDICT) &&
440 (md > land_max_interdiction_range))
443 if ((lp->lnd_ship != -1) || (lp->lnd_land != -1))
446 if (lp->lnd_item[I_MILIT] < 1)
449 range = roundrange(effrange(lp->lnd_frg, lp->lnd_tech));
453 shell = lp->lnd_item[I_SHELL];
454 gun = lp->lnd_item[I_GUN];
455 if (shell == 0 || gun == 0)
458 if (has_supply(lp)) {
460 putland(lp->lnd_uid, lp);
461 dam2 = ldround(landunitgun(lp->lnd_effic, lp->lnd_dam, gun,
462 lp->lnd_ammo, shell), 1);
463 if (sect.sct_type == SCT_WATER) {
464 if (chance(lp->lnd_acc / 100.0))
465 dam2 = ldround(dam2 / 2.0, 1);
468 if (sect.sct_type == SCT_WATER)
469 nreport(lp->lnd_own, N_SHP_SHELL, victim, 1);
471 nreport(lp->lnd_own, N_SCT_SHELL, victim, 1);
473 "%s fires at %s %s at %s\n",
474 prland(lp), cname(victim), s, xyas(x, y, lp->lnd_own));
476 mpr(victim, "%s %s fires at you at %s\n",
477 cname(lp->lnd_own), prland(lp), xyas(x, y, victim));
479 } else if (glp->thing->ef_type == EF_SHIP) {
480 sp = (struct shpstr *)glp->thing;
483 if (sp->shp_effic < 60)
485 if (sp->shp_frnge == 0)
487 if (((mission == MI_INTERDICT) ||
488 (mission == MI_SINTERDICT)) &&
489 (md > ship_max_interdiction_range))
491 if (sp->shp_item[I_MILIT] < 1)
494 if ((mcp->m_flags & M_SUB) &&
495 (sect.sct_type != SCT_WATER))
498 if (mission == MI_SINTERDICT) {
499 if (!(mcp->m_flags & M_SONAR))
501 if (!(mcp->m_flags & M_DCH) && !(mcp->m_flags & M_SUBT))
503 vrange = techfact(sp->shp_tech, mcp->m_vrnge);
504 vrange *= sp->shp_effic / 200.0;
507 /* can't look all the time */
511 if (mcp->m_flags & M_SUB) {
512 /* If we aren't shooting at "subs" or "ships" don't fire at all from
516 if (sp->shp_mobil < 0)
518 gun = sp->shp_item[I_GUN];
521 shell = sp->shp_item[I_SHELL];
522 if (shell < SHP_TORP_SHELLS)
523 shell += supply_commod(sp->shp_own,
524 sp->shp_x, sp->shp_y, I_SHELL,
525 SHP_TORP_SHELLS - shell);
526 if (shell < SHP_TORP_SHELLS)
529 range = roundrange(torprange(sp));
533 if (!line_of_sight(NULL, x, y, gp->x, gp->y))
535 sp->shp_item[I_SHELL] = shell - SHP_TORP_SHELLS;
536 sp->shp_mobil -= shp_mobcost(sp) / 2.0;
537 putship(sp->shp_uid, sp);
538 hitchance = DTORP_HITCHANCE(md, sp->shp_visib);
541 "%s locking on %s %s in %s\n",
542 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
544 "\tEffective torpedo range is %d.0\n", range);
546 "\tWhooosh... Hitchance = %d%%\n",
547 (int)(hitchance * 100));
549 if (hitchance < 1.0 && !chance(hitchance)) {
550 wu(0, sp->shp_own, "\tMissed\n");
552 "Incoming torpedo sighted @ %s missed (whew)!\n",
556 wu(0, sp->shp_own, "\tBOOM!...\n");
557 dam2 = TORP_DAMAGE();
560 nreport(victim, N_TORP_SHIP, 0, 1);
562 "\tTorpedo hit %s %s for %d damage\n",
563 cname(victim), s, dam2);
566 "Incoming torpedo sighted @ %s hits and does %d damage!\n",
567 xyas(x, y, victim), dam2);
569 range = roundrange(effrange(sp->shp_frnge, sp->shp_tech));
572 gun = sp->shp_item[I_GUN];
573 gun = MIN(gun, sp->shp_glim);
574 shell = sp->shp_item[I_SHELL];
576 shell += supply_commod(sp->shp_own,
577 sp->shp_x, sp->shp_y, I_SHELL,
579 gun = MIN(gun, shell);
580 gun = MIN(gun, sp->shp_item[I_MILIT] / 2.0);
584 dam2 = seagun(sp->shp_effic, gun);
588 prb = (double)md / range;
593 if (sect.sct_type == SCT_WATER)
594 nreport(sp->shp_own, N_SHP_SHELL, victim, 1);
596 nreport(sp->shp_own, N_SCT_SHELL, victim, 1);
598 "%s fires at %s %s at %s\n",
599 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
601 mpr(victim, "%s %s fires at you at %s\n",
602 cname(sp->shp_own), prship(sp), xyas(x, y, victim));
604 sp->shp_item[I_SHELL] = shell - gun;
605 putship(sp->shp_uid, sp);
607 } else if (glp->thing->ef_type == EF_PLANE) {
609 if (pcp->pl_flags & P_M)
610 /* units have their own missile interdiction */
611 if (hardtarget != SECT_HARDTARGET || pcp->pl_flags & P_MAR)
614 /* save planes for later */
615 plp = malloc(sizeof(struct plist));
617 memset(plp, 0, sizeof(struct plist));
619 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
620 if (plp->pcp->pl_flags & P_M)
621 emp_insque(&plp->queue, &missiles);
623 emp_insque(&plp->queue, &bombers);
624 plane_owner = plp->plane.pln_own;
627 if (!QEMPTY(&missiles)) {
628 /* I arbitrarily chose 100 mindam -KHS */
630 msl_launch_mindam(&missiles, x, y, hardtarget, EF_SECTOR, 100,
631 "sector", victim, mission);
632 qp = missiles.q_forw;
633 while (qp != (&missiles)) {
641 if (QEMPTY(&bombers)) {
644 glp = (struct genlist *)qp;
653 * If there are planes performing an
654 * interdict or support mission, find
655 * some escorts for them, if possible.
656 * Up to 2 per bomber, if possible.
658 find_escorts(x, y, plane_owner, &escorts);
660 if (mission == MI_SINTERDICT)
661 mission_pln_sel(&bombers, P_T | P_A, 0, hardtarget);
663 mission_pln_sel(&bombers, P_T, P_A, SECT_HARDTARGET);
665 mission_pln_sel(&escorts, P_ESC | P_F, 0, SECT_HARDTARGET);
667 for (qp = bombers.q_forw; qp != (&bombers); qp = qp->q_forw) {
668 plp = (struct plist *)qp;
669 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
670 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
673 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
678 air = (struct airport *)qp;
679 md = mapdist(x, y, air->x, air->y);
684 /* Split off the bombers at this base into b */
685 divide(&bombers, &b, air->x, air->y);
687 /* Split off the escorts at this base into e */
688 divide(&escorts, &e, air->x, air->y);
692 mission_flags |= P_X; /* stealth (shhh) */
693 mission_flags |= P_H; /* gets turned off if not all choppers */
695 mission_flags = mission_pln_arm(&b, air->x, air->y, 2 * md, 'p', 0,
696 0, mission_flags, &tech);
701 mission_flags = mission_pln_arm(&e, air->x, air->y, 2 * md, 'p', 0,
702 P_F | P_ESC, mission_flags, &tech);
704 pp = BestAirPath(buf, air->x, air->y, x, y);
705 if (CANT_HAPPEN(!pp))
707 wu(0, plane_owner, "Flying %s mission from %s\n",
708 mission_name(mission), xyas(air->x, air->y, plane_owner));
709 if (air->own && (air->own != plane_owner)) {
710 wu(0, air->own, "%s is flying %s mission from %s\n",
711 cname(plane_owner), mission_name(mission),
712 xyas(air->x, air->y, air->own));
715 ac_encounter(&b, &e, air->x, air->y, pp, mission_flags, 0, 0, 0);
719 air_damage(&b, x, y, mission, victim, s, hardtarget);
727 if (sect.sct_type == SCT_WATER)
728 nreport(plane_owner, N_SHP_BOMB, victim, 1);
730 nreport(plane_owner, N_SCT_BOMB, victim, 1);
733 /* free up all this memory */
736 glp = (struct genlist *)qp;
744 while (qp != (&escorts)) {
752 while (qp != (&bombers)) {
763 cando(int mission, int type)
767 if (type == EF_PLANE)
771 if (type == EF_PLANE)
775 if ((type == EF_PLANE) || (type == EF_SHIP))
783 if (type == EF_PLANE)
796 mission_name(short mission)
800 return "an interdiction";
804 return "a offensive support";
806 return "a defensive support";
812 return "a sub interdiction";
814 return "an air defense";
816 return "a mysterious";
820 show_mission(int type, struct nstr_item *np)
822 int first = 1, radius;
823 union empobj_storage item;
826 while (nxtitem(np, &item)) {
827 gp = (struct empobj *)&item;
828 if (!player->owner || gp->own == 0)
832 pr("Thing x,y op-sect rad mission\n");
835 pr("%-25s", obj_nameof(gp));
836 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
837 if (gp->mission == MI_INTERDICT || gp->mission == MI_SUPPORT ||
838 gp->mission == MI_OSUPPORT ||
839 gp->mission == MI_DSUPPORT || gp->mission == MI_AIR_DEFENSE) {
841 oprange(gp, &radius);
842 prxy(" %3d,%-3d", gp->opx, gp->opy, player->cnum);
843 if (radius < gp->radius)
846 pr(" %4d", gp->radius);
847 } else if (gp->mission == MI_RESERVE) {
851 getsect(gp->x, gp->y, §);
852 if ((sect.sct_type == SCT_HEADQ) && (sect.sct_effic >= 60))
855 if (item.land.lnd_rad_max == 0)
858 plus += item.land.lnd_rad_max;
859 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
861 } else if (gp->mission == MI_ESCORT) {
863 pr(" %4d", item.plane.pln_range / 2);
867 pr(" is on %s mission\n", mission_name(gp->mission));
869 pr(" has no mission.\n");
874 oprange(struct empobj *gp, int *radius)
878 switch (gp->ef_type) {
880 range = ldround(effrange(((struct shpstr *)gp)->shp_frnge,
881 ((struct shpstr *)gp)->shp_tech), 1);
884 range = ldround(effrange(((struct lndstr *)gp)->lnd_frg,
885 ((struct lndstr *)gp)->lnd_tech), 1);
888 /* missiles go one way, so we can use all the range */
889 if (plchr[(int)gp->type].pl_flags & P_M)
890 range = ((struct plnstr *)gp)->pln_range;
892 range = ((struct plnstr *)gp)->pln_range / 2;
895 CANT_HAPPEN("bad TYPE");
906 * Remove all planes who cannot go on
907 * the mission from the plane list.
910 mission_pln_sel(struct emp_qelem *list, int wantflags, int nowantflags,
913 struct emp_qelem *qp, *next;
915 struct plchrstr *pcp;
920 for (qp = list->q_forw; qp != list; qp = next) {
922 plp = (struct plist *)qp;
926 if (pp->pln_effic < 40) {
932 if (pp->pln_mobil < 1) {
939 if (ontradingblock(EF_PLANE, pp)) {
946 if (!pln_capable(pp, wantflags, nowantflags)) {
952 if (!pln_airbase_ok(pp, 0, 0)) {
958 if (pcp->pl_flags & P_A) {
959 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
966 putplane(pp->pln_uid, pp);
971 * Arm only the planes at x,y
974 mission_pln_arm(struct emp_qelem *list, coord x, coord y, int dist,
975 int mission, struct ichrstr *ip, int flags,
976 int mission_flags, int *tech)
978 struct emp_qelem *qp;
979 struct emp_qelem *next;
984 for (qp = list->q_forw; qp != list; qp = next) {
986 plp = (struct plist *)qp;
988 if (plp->plane.pln_x != x)
990 if (plp->plane.pln_y != y)
993 if (mission_pln_equip(plp, ip, flags, mission) < 0) {
998 if (flags & (P_S | P_I)) {
999 if (plp->pcp->pl_flags & P_S)
1000 mission_flags |= P_S;
1001 if (plp->pcp->pl_flags & P_I)
1002 mission_flags |= P_I;
1004 if (*tech > plp->plane.pln_tech)
1005 *tech = plp->plane.pln_tech;
1006 if (!(plp->pcp->pl_flags & P_H))
1007 /* no stealth on this mission */
1008 mission_flags &= ~P_H;
1009 if (!(plp->pcp->pl_flags & P_X))
1010 /* no stealth on this mission */
1011 mission_flags &= ~P_X;
1012 if (!(plp->pcp->pl_flags & P_A)) {
1013 /* no asw on this mission */
1014 mission_flags &= ~P_A;
1016 if (!(plp->pcp->pl_flags & P_MINE)) {
1017 /* no asw on this mission */
1018 mission_flags &= ~P_MINE;
1022 * Mob costs for missions are 1/2 normal
1025 /* plp->plane.pln_mobil -= pln_mobcost(dist,&plp->plane,flags)/2;*/
1026 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
1029 return mission_flags;
1033 mission_pln_equip(struct plist *plp, struct ichrstr *ip, int flags,
1036 struct plchrstr *pcp;
1048 if (pp->pln_ship >= 0) {
1049 getship(pp->pln_ship, &ship);
1050 item = ship.shp_item;
1051 } else if (pp->pln_land >= 0) {
1052 getland(pp->pln_land, &land);
1053 item = land.lnd_item;
1055 getsect(pp->pln_x, pp->pln_y, §);
1056 item = sect.sct_item;
1058 if (pcp->pl_fuel > item[I_PETROL]) {
1061 item[I_PETROL] -= pcp->pl_fuel;
1063 if (!(flags & P_F)) {
1069 if (pp->pln_nuketype == -1) {
1071 needed = pp->pln_load;
1075 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1078 needed = (pp->pln_load * 2) / ip->i_lbs;
1081 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1084 needed = (pp->pln_load * 2) / ip->i_lbs;
1087 if ((pcp->pl_flags & (P_V | P_C)) == 0)
1090 needed = pp->pln_load / ip->i_lbs;
1093 if (pp->pln_nuketype == -1)
1096 case 'i': /* missile interception */
1099 needed = pp->pln_load;
1105 if (rval < 0 || (itype != I_NONE && needed <= 0)) {
1108 if (itype != I_NONE) {
1109 if (itype == I_SHELL && item[itype] < needed)
1110 item[itype] += supply_commod(plp->plane.pln_own,
1114 if (item[itype] < needed)
1116 item[itype] -= needed;
1118 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
1119 plp->bombs = needed;
1123 if (pp->pln_ship >= 0)
1124 putship(ship.shp_uid, &ship);
1125 else if (pp->pln_land >= 0)
1126 putland(land.lnd_uid, &land);
1133 * Return 1 if this x,y pair is in the list
1136 find_airport(struct emp_qelem *airp, coord x, coord y)
1138 struct emp_qelem *qp;
1141 for (qp = airp->q_forw; qp != airp; qp = qp->q_forw) {
1142 a = (struct airport *)qp;
1143 if ((a->x == x) && (a->y == y))
1150 /* #*# This needs to be changed to include acc's -KHS */
1152 add_airport(struct emp_qelem *airp, coord x, coord y)
1157 a = malloc(sizeof(struct airport));
1161 getsect(x, y, §);
1162 a->own = sect.sct_own;
1164 emp_insque((struct emp_qelem *)a, airp);
1168 * Take all the planes in list 1 that
1169 * are at x,y, and put them into list 2.
1172 divide(struct emp_qelem *l1, struct emp_qelem *l2, coord x, coord y)
1174 struct emp_qelem *qp, *next;
1177 for (qp = l1->q_forw; qp != l1; qp = next) {
1179 plp = (struct plist *)qp;
1181 if (plp->plane.pln_x != x)
1183 if (plp->plane.pln_y != y)
1192 air_damage(struct emp_qelem *bombers, coord x, coord y, int mission,
1193 natid victim, char *s, int hardtarget)
1195 struct emp_qelem *qp;
1198 int newdam, dam = 0;
1202 for (qp = bombers->q_forw; qp != bombers; qp = qp->q_forw) {
1203 plp = (struct plist *)qp;
1206 if ((mission == MI_SINTERDICT) && !(plp->pcp->pl_flags & P_A))
1213 if (plp->pcp->pl_flags & P_A) {
1214 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
1216 "\t%s detects sub movement in %s\n",
1217 prplane(pp), xyas(x, y, pp->pln_own));
1220 if (getrel(getnatp(pp->pln_own), victim) > HOSTILE) {
1222 "\t%s tracks %s %s at %s\n",
1223 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1227 "\t%s depth-charging %s %s in %s\n",
1228 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1231 "\t%s pinbombing %s %s in %s\n",
1232 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1234 hitchance = pln_hitchance(pp, hardtarget, EF_SHIP);
1235 if (plp->plane.pln_nuketype != -1)
1237 else if (hardtarget != SECT_HARDTARGET)
1238 wu(0, pp->pln_own, "\t\t%d%% hitchance...", hitchance);
1239 /* Always calculate damage */
1240 if (roll(100) <= hitchance) {
1241 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
1243 if (mission == MI_INTERDICT) {
1245 "\t\tnuclear warhead on plane %s does %d damage to %s %s\n",
1246 prplane(pp), nukedam, cname(victim), s);
1251 "\t\thit %s %s for %d damage\n",
1252 cname(victim), s, newdam);
1256 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
1257 wu(0, pp->pln_own, "missed\n");
1258 if (mission == MI_SINTERDICT) {
1260 "RUMBLE... your sub in %s hears a depth-charge explode nearby\n",
1261 xyas(x, y, victim));
1262 } else if (*s == 's') {
1263 mpr(victim, "SPLASH! Bombs miss your %s in %s\n",
1264 s, xyas(x, y, victim));
1266 mpr(victim, "SPLAT! Bombs miss your %s in %s\n",
1267 s, xyas(x, y, victim));
1269 /* Now, even though we missed, the bombs
1271 collateral_damage(x, y, newdam, bombers);
1274 /* use up missiles */
1275 if (plp->pcp->pl_flags & P_M)
1283 * Check to see if anyone hostile to the victim
1284 * is running an air defense mission on this
1285 * sector. If so, do air combat
1288 air_defense(coord x, coord y, natid victim, struct emp_qelem *bomb_list,
1289 struct emp_qelem *esc_list)
1292 int mission_flags, tech, combat = 0, rel, dist, z;
1293 struct emp_qelem *qp, interceptors, airp, i, empty, *next;
1295 struct genlist *glp;
1297 struct genlist mi[MAXNOC];
1304 for (qp = bomb_list->q_forw; qp != bomb_list; qp = qp->q_forw)
1306 for (qp = esc_list->q_forw; qp != esc_list; qp = qp->q_forw)
1309 memset(mi, 0, sizeof(mi));
1310 for (z = 1; z < MAXNOC; z++)
1311 emp_initque((struct emp_qelem *)&mi[z]);
1313 build_mission_list_type(mi, x, y, MI_AIR_DEFENSE, EF_PLANE, victim);
1315 for (cn = 1; cn < MAXNOC; cn++) {
1316 /* Check our relations */
1317 rel = getrel(getnatp(cn), victim);
1322 if (QEMPTY(&mi[cn].queue))
1325 /* Ok, make a list of all the interceptors. Note that this *copies* the
1326 * list from the mission creation. This list must be deleted later. */
1327 emp_initque(&interceptors);
1328 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1330 glp = (struct genlist *)qp;
1333 dist = mapdist(x, y, gp->x, gp->y);
1335 plp = malloc(sizeof(struct plist));
1336 memset(plp, 0, sizeof(struct plist));
1338 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
1340 /* missiles go one way, so we can use all the range */
1341 if (!(plp->pcp->pl_flags & P_M))
1343 /* If it's out of range, free it and continue on */
1344 if (dist > plp->plane.pln_range) {
1348 emp_insque(&plp->queue, &interceptors);
1351 /* Remove those who cannot go */
1352 mission_pln_sel(&interceptors, P_F, 0, SECT_HARDTARGET);
1354 if (QEMPTY(&interceptors))
1357 /* Now, delete all the extras, but delete the first ones, not the last ones, so
1358 * that the higher numbered planes go into battle (they should be the better ones
1359 * at fighting, if all went well.) */
1361 for (qp = interceptors.q_forw; qp != (&interceptors);
1364 tcount -= count * 2;
1365 /* Just in case there are more incoming than we have */
1368 for (qp = interceptors.q_forw; qp != (&interceptors); qp = next) {
1372 /* Free it up and continue */
1374 glp = (struct genlist *)qp;
1379 /* Now, make a list of all the airports these planes are coming from */
1381 for (qp = interceptors.q_forw; qp != (&interceptors);
1383 plp = (struct plist *)qp;
1384 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
1385 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
1388 /* Now, fly them out one airport at a time */
1389 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
1390 struct airport *air;
1392 air = (struct airport *)qp;
1393 dist = mapdist(x, y, air->x, air->y);
1397 /* Split off the interceptors at this base into i */
1398 divide(&interceptors, &i, air->x, air->y);
1402 mission_flags |= P_X; /* stealth (shhh) */
1403 /* gets turned off if not all choppers */
1404 mission_flags |= P_H;
1405 sam_intercept(bomb_list, &i, cn, victim, x, y, 0);
1406 sam_intercept(esc_list, &i, cn, victim, x, y, 1);
1408 /* Did we run out of interceptors? */
1411 /* Did we run out of bombers? */
1412 if (QEMPTY(bomb_list)) {
1413 /* Yes, so we have to put the rest of the interceptors back, and
1414 then continue, or we leak memory */
1419 mission_pln_arm(&i, air->x, air->y, 2 * dist, 'r', 0, P_F,
1420 mission_flags, &tech);
1422 /* Did we run out of interceptors? */
1425 /* Did we run out of bombers? */
1426 if (QEMPTY(bomb_list)) {
1427 /* Yes, so we have to put the rest of the interceptors back, and
1428 then continue, or we leak memory */
1433 path = BestAirPath(buf, air->x, air->y, x, y);
1434 if (CANT_HAPPEN(!path))
1436 wu(0, cn, "Flying %s mission from %s\n",
1437 mission_name(MI_AIR_DEFENSE), xyas(air->x, air->y, cn));
1438 if (air->own && (air->own != cn)) {
1439 wu(0, air->own, "%s is flying %s mission from %s\n",
1440 cname(cn), mission_name(MI_AIR_DEFENSE),
1441 xyas(air->x, air->y, air->own));
1444 /* Now, fly the planes to the sector */
1445 emp_initque(&empty);
1446 ac_encounter(&i, &empty, air->x, air->y,
1447 path, mission_flags, 1, bomb_list, esc_list);
1449 /* If none made it, continue */
1453 /* Some made it, so now they get to try to fight. */
1454 /* Intercept the escorts first */
1456 if (!QEMPTY(esc_list)) {
1457 mpr(victim, "%s air defense planes intercept!\n",
1459 ac_combat_headers(victim, cn);
1460 ac_airtoair(esc_list, &i);
1463 /* Now intercept the bombers */
1464 if (!QEMPTY(bomb_list)) {
1466 mpr(victim, "%s air defense planes intercept!\n",
1468 ac_combat_headers(victim, cn);
1470 ac_airtoair(bomb_list, &i);
1479 /* We have to free all of these, if they are still there, otherwise they get
1480 lost and we leak memory all over the place. */
1481 for (cn = 1; cn < MAXNOC; cn++) {
1482 /* free up all this memory if it's still there */
1483 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1485 glp = (struct genlist *)qp;