2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * mission.c: Mission subroutines for planes/ships/units
30 * Known contributors to this file:
32 * Steve McClure, 1996-2000
55 #include "prototypes.h"
59 struct emp_qelem queue; /* list of units */
60 int type; /* unit type: EF_SHIP, EF_PLANE, EF_LAND */
61 void *cp; /* pointer to desc of thing */
62 void *thing; /* thing's struct */
66 struct emp_qelem queue;
77 static void add_airport(struct emp_qelem *, coord, coord);
78 static int air_damage(struct emp_qelem *, coord, coord, int, natid,
80 static void build_mission_list(struct genlist *, coord, coord, int, natid);
81 static void build_mission_list_type(struct genlist *, coord, coord, int,
83 static void divide(struct emp_qelem *, struct emp_qelem *, coord, coord);
84 static int dosupport(struct genlist *, coord, coord, natid, natid);
85 static int find_airport(struct emp_qelem *, coord, coord);
86 static int mission_pln_arm(struct emp_qelem *, coord, coord, int,
87 int, struct ichrstr *, int, int, int *);
88 static void mission_pln_sel(struct emp_qelem *, int, int, int);
89 static int perform_mission(coord, coord, natid, struct emp_qelem *, int,
93 * Interdict commodities & transported planes
96 ground_interdict(coord x, coord y, natid victim, char *s)
99 int dam = 0, newdam, rel;
100 struct genlist mi[MAXNOC];
103 memset(mi, 0, sizeof(mi));
104 for (z = 1; z < MAXNOC; z++)
105 emp_initque((struct emp_qelem *)&mi[z]);
107 build_mission_list(mi, x, y, MI_INTERDICT, victim);
109 for (cn = 1; cn < MAXNOC; cn++) {
110 rel = getrel(getnatp(cn), victim);
114 if (QEMPTY(&mi[cn].queue))
117 newdam = perform_mission(x, y, victim, &mi[cn].queue,
118 MI_INTERDICT, s, SECT_HARDTARGET);
121 mpr(victim, "%s interdiction mission does %d damage!\n",
125 collateral_damage(x, y, dam, 0);
131 collateral_damage(coord x, coord y, int dam, struct emp_qelem *list)
139 getsect(x, y, §);
141 coll = ldround((double)dam * collateral_dam, 1);
144 mpr(sect.sct_own, "%s takes %d%% collateral damage\n",
145 xyas(x, y, sect.sct_own), coll);
146 sectdamage(§, coll, list);
154 only_subs(struct emp_qelem *list)
156 struct emp_qelem *qp;
160 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
161 glp = (struct genlist *)qp;
163 if (glp->type != EF_SHIP)
166 if (!(mcp->m_flags & M_SUB))
170 /* They were all subs! */
176 * Interdict ships & land units
180 unit_interdict(coord x, coord y, natid victim, char *s, int hardtarget,
185 struct genlist mi[MAXNOC];
189 memset(mi, 0, sizeof(mi));
190 for (z = 1; z < MAXNOC; z++)
191 emp_initque((struct emp_qelem *)&mi[z]);
193 build_mission_list(mi, x, y, mission, victim);
195 for (cn = 1; cn < MAXNOC; cn++) {
198 if (mission == MI_SINTERDICT) {
199 if (getrel(getnatp(cn), victim) >= FRIENDLY)
201 } else if (getrel(getnatp(cn), victim) > HOSTILE)
204 if (QEMPTY(&mi[cn].queue))
207 osubs = only_subs(&mi[cn].queue);
208 newdam = perform_mission(x, y, victim, &mi[cn].queue,
209 mission, s, hardtarget);
212 /* If only subs responded, then we don't know who's
214 mpr(victim, "%s interdiction mission does %d damage!\n",
215 osubs ? "Enemy" : cname(cn), newdam);
219 collateral_damage(x, y, dam, 0);
225 * Perform a mission against victim, on behalf of actee
228 off_support(coord x, coord y, natid victim, natid actee)
231 struct genlist mi[MAXNOC];
234 memset(mi, 0, sizeof(mi));
235 for (z = 1; z < MAXNOC; z++)
236 emp_initque((struct emp_qelem *)&mi[z]);
238 build_mission_list(mi, x, y, MI_SUPPORT, victim);
239 build_mission_list(mi, x, y, MI_OSUPPORT, victim);
241 dam = dosupport(mi, x, y, victim, actee);
246 * Perform a mission against victim, on behalf of actee
249 def_support(coord x, coord y, natid victim, natid actee)
252 struct genlist mi[MAXNOC];
255 memset(mi, 0, sizeof(mi));
256 for (z = 1; z < MAXNOC; z++)
257 emp_initque((struct emp_qelem *)&mi[z]);
259 build_mission_list(mi, x, y, MI_SUPPORT, victim);
260 build_mission_list(mi, x, y, MI_DSUPPORT, victim);
262 dam = dosupport(mi, x, y, victim, actee);
267 dosupport(struct genlist *mi, coord x, coord y, natid victim, natid actee)
273 for (cn = 1; cn < MAXNOC; cn++) {
274 rel = getrel(getnatp(cn), actee);
275 if ((cn != actee) && (rel != ALLIED))
277 rel = getrel(getnatp(cn), victim);
278 if ((cn != actee) && (rel != AT_WAR))
281 if (QEMPTY(&mi[cn].queue))
284 dam += perform_mission(x, y, victim, &mi[cn].queue, MI_SUPPORT,
285 "", SECT_HARDTARGET);
291 build_mission_list(struct genlist *mi, coord x, coord y, int mission,
294 build_mission_list_type(mi, x, y, mission, EF_LAND, victim);
295 build_mission_list_type(mi, x, y, mission, EF_SHIP, victim);
296 build_mission_list_type(mi, x, y, mission, EF_PLANE, victim);
300 build_mission_list_type(struct genlist *mi, coord x, coord y, int mission,
301 int type, natid victim)
312 snxtitem_all(&ni, type);
313 while (nxtitem(&ni, &item)) {
314 gp = (struct genitem *)&item;
322 if ((gp->mission != mission) && (mission != MI_SINTERDICT))
325 if ((gp->mission != mission) && (mission == MI_SINTERDICT) &&
326 (gp->mission != MI_INTERDICT))
329 relat = getrel(getnatp(gp->own), victim);
330 if (mission == MI_SINTERDICT) {
331 if (relat >= FRIENDLY)
333 else if (type != EF_PLANE && relat > HOSTILE)
335 } else if (relat > HOSTILE)
338 dist = mapdist(x, y, gp->opx, gp->opy);
341 if (mission != MI_RESERVE) /* XXX */
342 oprange(gp, type, &radius);
347 /* Ok, it is within the operations range. */
348 /* Now check from where the object actually is */
349 dist = mapdist(x, y, gp->x, gp->y);
351 oprange(gp, type, &radius);
354 /* Ok, the object can get to where the x,y is */
357 if (mission != MI_AIR_DEFENSE) {
358 getsect(x, y, §);
359 if (getrel(getnatp(gp->own), sect.sct_own) > AT_WAR) {
362 * If the player->owner of the unit isn't at war
363 * with the victim, and doesn't own the
364 * sect being acted upon, and isn't the
365 * old player->owner of that sect, bounce them.
367 if (sect.sct_type != SCT_WATER &&
368 sect.sct_own != gp->own &&
369 sect.sct_oldown != gp->own)
375 glp = malloc(sizeof(struct genlist));
376 memset(glp, 0, sizeof(struct genlist));
380 glp->cp = &lchr[(int)gp->type];
383 glp->cp = &mchr[(int)gp->type];
386 glp->cp = &plchr[(int)gp->type];
389 glp->thing = malloc(sizeof(item));
390 memcpy(glp->thing, &item, sizeof(item));
391 emp_insque(&glp->queue, &mi[gp->own].queue);
396 find_escorts(coord x, coord y, natid cn, struct emp_qelem *escorts)
403 snxtitem_all(&ni, EF_PLANE);
404 while (nxtitem(&ni, &plane)) {
405 if (plane.pln_own != cn)
408 if (plane.pln_mission != MI_ESCORT)
411 dist = mapdist(x, y, plane.pln_x, plane.pln_y);
413 if (dist > ((int)((float)plane.pln_range / 2.0)))
416 plp = malloc(sizeof(struct plist));
417 memset(plp, 0, sizeof(struct plist));
418 plp->pcp = &plchr[(int)plane.pln_type];
420 emp_insque(&plp->queue, escorts);
425 perform_mission(coord x, coord y, natid victim, struct emp_qelem *list,
426 int mission, char *s, int hardtarget)
428 struct emp_qelem *qp, missiles, bombers, escorts, airp, b, e;
429 struct emp_qelem *newqp;
437 struct plchrstr *pcp;
438 int dam = 0, dam2, mission_flags, tech;
439 natid plane_owner = 0;
440 int gun, shell, md, air_dam = 0;
441 double range2, prb, range, mobcost, hitchance;
443 getsect(x, y, §);
445 emp_initque(&missiles);
446 emp_initque(&bombers);
447 emp_initque(&escorts);
450 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
451 glp = (struct genlist *)qp;
454 md = mapdist(x, y, gp->x, gp->y);
456 if (glp->type == EF_LAND) {
459 if (lp->lnd_effic < LAND_MINFIREEFF)
462 if (mission == MI_SINTERDICT)
465 if ((mission == MI_INTERDICT) &&
466 (md > land_max_interdiction_range))
469 if (md > (lp->lnd_frg / 2))
472 if ((lp->lnd_ship != -1) || (lp->lnd_land != -1))
475 if (lnd_getmil(lp) < 1)
478 range = techfact((int)lp->lnd_tech, (double)lp->lnd_frg / 2.0);
479 range2 = (double)roundrange(range);
484 shell = lp->lnd_item[I_SHELL];
485 gun = lp->lnd_item[I_GUN];
486 if (shell == 0 || gun == 0)
489 if (has_supply(lp)) {
491 putland(lp->lnd_uid, lp);
492 dam2 = ldround(landunitgun(lp->lnd_effic, lp->lnd_dam, gun,
493 lp->lnd_ammo, shell), 1);
494 if (sect.sct_type == SCT_WATER) {
495 double dam3 = (double)dam2;
496 if (chance(((double)lp->lnd_acc) / 100.0))
497 dam2 = ldround((dam3 / 2.0), 1);
500 if (sect.sct_type == SCT_WATER)
501 nreport(lp->lnd_own, N_SHP_SHELL, victim, 1);
503 nreport(lp->lnd_own, N_SCT_SHELL, victim, 1);
505 "%s fires at %s %s at %s\n",
506 prland(lp), cname(victim), s, xyas(x, y, lp->lnd_own));
508 mpr(victim, "%s %s fires at you at %s\n",
509 cname(lp->lnd_own), prland(lp), xyas(x, y, victim));
511 } else if (glp->type == EF_SHIP) {
515 if (sp->shp_effic < 60)
517 if (sp->shp_frnge == 0)
519 if (((mission == MI_INTERDICT) ||
520 (mission == MI_SINTERDICT)) &&
521 (md > ship_max_interdiction_range))
523 if (sp->shp_item[I_MILIT] < 1)
526 if ((mcp->m_flags & M_SUB) &&
527 (sect.sct_type != SCT_WATER))
530 if (mission == MI_SINTERDICT) {
531 if (!(mcp->m_flags & M_SONAR))
533 if (!(mcp->m_flags & M_DCH) && !(mcp->m_flags & M_SUBT))
535 range2 = techfact(sp->shp_tech, (double)mcp->m_vrnge);
536 range2 *= (double)sp->shp_effic / 200.0;
539 /* can't look all the time */
543 if (mcp->m_flags & M_SUB) {
544 /* If we aren't shooting at "subs" or "ships" don't fire at all from
548 if (sp->shp_mobil < 0)
550 gun = sp->shp_item[I_GUN];
553 shell = sp->shp_item[I_SHELL];
554 if (shell < SHP_TORP_SHELLS)
555 shell += supply_commod(sp->shp_own,
556 sp->shp_x, sp->shp_y, I_SHELL,
557 SHP_TORP_SHELLS - shell);
558 if (shell < SHP_TORP_SHELLS)
561 range = sp->shp_effic * techfact(sp->shp_tech,
562 ((double)sp->shp_frnge)) /
565 range2 = (double)roundrange(range);
569 if (!line_of_sight(NULL, x, y, gp->x, gp->y))
571 sp->shp_item[I_SHELL] = shell - SHP_TORP_SHELLS;
572 mobcost = sp->shp_effic * 0.01 * sp->shp_speed;
573 mobcost = (480.0 / (mobcost +
574 techfact(sp->shp_tech, mobcost)));
575 sp->shp_mobil -= mobcost;
576 putship(sp->shp_uid, sp);
577 hitchance = DTORP_HITCHANCE(md, sp->shp_visib);
580 "%s locking on %s %s in %s\n",
581 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
583 "\tEffective torpedo range is %.1f\n", range);
585 "\tWhooosh... Hitchance = %d%%\n",
586 (int)(hitchance * 100));
588 if (hitchance < 1.0 && !chance(hitchance)) {
589 wu(0, sp->shp_own, "\tMissed\n");
591 "Incoming torpedo sighted @ %s missed (whew)!\n",
595 wu(0, sp->shp_own, "\tBOOM!...\n");
596 dam2 = TORP_DAMAGE();
599 nreport(victim, N_TORP_SHIP, 0, 1);
601 "\tTorpedo hit %s %s for %d damage\n",
602 cname(victim), s, dam2);
605 "Incoming torpedo sighted @ %s hits and does %d damage!\n",
606 xyas(x, y, victim), dam2);
608 range = techfact(sp->shp_tech, (double)mcp->m_frnge / 2.0);
609 range2 = (double)roundrange(range);
612 gun = sp->shp_item[I_GUN];
613 gun = MIN(gun, sp->shp_glim);
614 shell = sp->shp_item[I_SHELL];
616 shell += supply_commod(sp->shp_own,
617 sp->shp_x, sp->shp_y, I_SHELL,
619 gun = MIN(gun, shell);
620 gun = MIN(gun, sp->shp_item[I_MILIT] / 2.0);
624 dam2 = seagun(sp->shp_effic, gun);
628 prb = ((double)md) / range2;
631 dam2 = (int)((float)dam2 / 2.0);
633 if (sect.sct_type == SCT_WATER)
634 nreport(sp->shp_own, N_SHP_SHELL, victim, 1);
636 nreport(sp->shp_own, N_SCT_SHELL, victim, 1);
638 "%s fires at %s %s at %s\n",
639 prship(sp), cname(victim), s, xyas(x, y, sp->shp_own));
641 mpr(victim, "%s %s fires at you at %s\n",
642 cname(sp->shp_own), prship(sp), xyas(x, y, victim));
644 sp->shp_item[I_SHELL] = shell - gun;
645 putship(sp->shp_uid, sp);
647 } else if (glp->type == EF_PLANE) {
649 if (pcp->pl_flags & P_M)
650 /* units have their own missile interdiction */
651 if (hardtarget != SECT_HARDTARGET || pcp->pl_flags & P_MAR)
654 /* save planes for later */
655 plp = malloc(sizeof(struct plist));
657 memset(plp, 0, sizeof(struct plist));
659 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
660 if (plp->pcp->pl_flags & P_M)
661 emp_insque(&plp->queue, &missiles);
663 emp_insque(&plp->queue, &bombers);
664 plane_owner = plp->plane.pln_own;
667 if (!QEMPTY(&missiles)) {
668 /* I arbitrarily chose 100 mindam -KHS */
670 msl_launch_mindam(&missiles, x, y, hardtarget, EF_SECTOR, 100,
671 "sector", victim, mission);
672 qp = missiles.q_forw;
673 while (qp != (&missiles)) {
681 if (QEMPTY(&bombers)) {
684 glp = (struct genlist *)qp;
693 * If there are planes performing an
694 * interdict or support mission, find
695 * some escorts for them, if possible.
696 * Up to 2 per bomber, if possible.
698 find_escorts(x, y, plane_owner, &escorts);
700 if (mission == MI_SINTERDICT)
701 mission_pln_sel(&bombers, P_T | P_A, 0, hardtarget);
703 mission_pln_sel(&bombers, P_T, P_A, SECT_HARDTARGET);
705 mission_pln_sel(&escorts, P_ESC | P_F, 0, SECT_HARDTARGET);
707 for (qp = bombers.q_forw; qp != (&bombers); qp = qp->q_forw) {
708 plp = (struct plist *)qp;
709 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
710 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
713 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
718 air = (struct airport *)qp;
719 md = mapdist(x, y, air->x, air->y);
724 /* Split off the bombers at this base into b */
725 divide(&bombers, &b, air->x, air->y);
727 /* Split off the escorts at this base into e */
728 divide(&escorts, &e, air->x, air->y);
732 mission_flags |= P_X; /* stealth (shhh) */
733 mission_flags |= P_H; /* gets turned off if not all choppers */
735 mission_flags = mission_pln_arm(&b, air->x, air->y, 2 * md, 'p', 0,
736 0, mission_flags, &tech);
741 mission_flags = mission_pln_arm(&e, air->x, air->y, 2 * md, 'p', 0,
742 P_F | P_ESC, mission_flags, &tech);
744 pp = BestAirPath(buf, air->x, air->y, x, y);
745 if (CANT_HAPPEN(!pp))
747 wu(0, plane_owner, "Flying %s mission from %s\n",
748 mission_name(mission), xyas(air->x, air->y, plane_owner));
749 if (air->own && (air->own != plane_owner)) {
750 wu(0, air->own, "%s is flying %s mission from %s\n",
751 cname(plane_owner), mission_name(mission),
752 xyas(air->x, air->y, air->own));
755 ac_encounter(&b, &e, air->x, air->y, pp, mission_flags, 0, 0, 0);
759 air_damage(&b, x, y, mission, victim, s, hardtarget);
767 if (sect.sct_type == SCT_WATER)
768 nreport(plane_owner, N_SHP_BOMB, victim, 1);
770 nreport(plane_owner, N_SCT_BOMB, victim, 1);
773 /* free up all this memory */
776 glp = (struct genlist *)qp;
784 while (qp != (&escorts)) {
792 while (qp != (&bombers)) {
803 cando(int mission, int type)
807 if (type == EF_PLANE)
811 if (type == EF_PLANE)
815 if ((type == EF_PLANE) || (type == EF_SHIP))
823 if (type == EF_PLANE)
836 nameofitem(struct genitem *gp, int type)
840 return prship((struct shpstr *)gp);
842 return prplane((struct plnstr *)gp);
844 return prland((struct lndstr *)gp);
850 mission_name(short int mission)
854 return "an interdiction";
858 return "a offensive support";
860 return "a defensive support";
866 return "a sub interdiction";
868 return "an air defense";
870 return "a mysterious";
874 show_mission(int type, struct nstr_item *np)
876 int first = 1, radius;
880 while (nxtitem(np, &item)) {
881 gp = (struct genitem *)&item;
882 if (!player->owner || gp->own == 0)
886 pr("Thing x,y op-sect rad mission\n");
889 pr("%-25s", nameofitem(gp, type));
890 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
891 if (gp->mission == MI_INTERDICT || gp->mission == MI_SUPPORT ||
892 gp->mission == MI_OSUPPORT ||
893 gp->mission == MI_DSUPPORT || gp->mission == MI_AIR_DEFENSE) {
895 oprange(gp, type, &radius);
896 prxy(" %3d,%-3d", gp->opx, gp->opy, player->cnum);
897 if (radius < gp->radius)
900 pr(" %4d", gp->radius);
901 } else if (gp->mission == MI_RESERVE) {
905 getsect(gp->x, gp->y, §);
906 if ((sect.sct_type == SCT_HEADQ) && (sect.sct_effic >= 60))
909 if (item.land.lnd_rad_max == 0)
912 plus += item.land.lnd_rad_max;
913 prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
915 } else if (gp->mission == MI_ESCORT) {
917 pr(" %4d", (int)(item.plane.pln_range / 2.0));
921 pr(" is on %s mission\n", mission_name(gp->mission));
923 pr(" has no mission.\n");
928 oprange(struct genitem *gp, int type, int *radius)
937 getship(gp->uid, &ship);
938 range = ldround(techfact(gp->tech,
939 (double)ship.shp_frnge / 2.0), 1);
942 getland(gp->uid, &land);
943 range = ldround(techfact((int)land.lnd_tech,
944 (double)land.lnd_frg / 2.0), 1);
947 getplane(gp->uid, &plane);
948 /* missiles go one way, so we can use all the range */
949 if (plchr[(int)plane.pln_type].pl_flags & P_M)
950 range = plane.pln_range;
952 range = ldround((double)plane.pln_range / 2.0, 1);;
955 CANT_HAPPEN("bad TYPE");
966 * Remove all planes who cannot go on
967 * the mission from the plane list.
970 mission_pln_sel(struct emp_qelem *list, int wantflags, int nowantflags,
973 struct emp_qelem *qp, *next;
978 struct plchrstr *pcp;
983 for (qp = list->q_forw; qp != list; qp = next) {
985 plp = (struct plist *)qp;
989 if (pp->pln_effic < 40) {
995 if (pp->pln_mobil < 1) {
1002 if (ontradingblock(EF_PLANE, pp)) {
1012 for (x = 0; x < sizeof(wantflags) * 8; x++) {
1014 if ((wantflags & y) == y)
1015 if ((pcp->pl_flags & y) != y) {
1037 if ((pcp->pl_flags & P_ESC) || (pcp->pl_flags & P_F))
1041 if ((pcp->pl_flags & P_E) ||
1042 (pcp->pl_flags & P_K) || (pcp->pl_flags & P_L))
1054 for (x = 0; x < sizeof(nowantflags) * 8; x++) {
1056 if ((nowantflags & y) == y)
1057 if ((pcp->pl_flags & y) == y)
1066 if (pp->pln_ship >= 0) {
1067 if (!getship(pp->pln_ship, &ship)) {
1070 putplane(pp->pln_uid, pp);
1075 if (!can_be_on_ship(pp->pln_uid, ship.shp_uid)) {
1078 if (ship.shp_effic < SHIP_MINEFF) {
1081 /* Can't fly off of inefficient or non-owned, non-allied ships */
1082 if ((ship.shp_effic < SHP_AIROPS_EFF) ||
1083 ((ship.shp_own != pp->pln_own) &&
1084 (getrel(getnatp(ship.shp_own), pp->pln_own) != ALLIED))) {
1090 if (pp->pln_land >= 0) {
1091 if (!getland(pp->pln_land, &land)) {
1094 putplane(pp->pln_uid, pp);
1099 if (!(pcp->pl_flags & P_E))
1101 if (land.lnd_effic < LAND_MINEFF)
1104 /* Can't fly off of inefficient or non-owned, non-allied units */
1105 if ((land.lnd_effic < LND_AIROPS_EFF) ||
1106 ((land.lnd_own != pp->pln_own) &&
1107 (getrel(getnatp(land.lnd_own), pp->pln_own) != ALLIED))) {
1113 /* Can't fly off units in ships or other units */
1114 if ((land.lnd_ship >= 0) || (land.lnd_land >= 0)) {
1120 /* Now, check the sector status if not on a plane or unit */
1121 if ((pp->pln_ship < 0) && (pp->pln_land < 0)) {
1122 /* If we can't get the sector, we can't check it, and can't fly */
1123 if (!getsect(pp->pln_x, pp->pln_y, §)) {
1128 /* First, check allied status */
1129 /* Can't fly from non-owned sectors or non-allied sectors */
1130 if ((sect.sct_own != pp->pln_own) &&
1131 (getrel(getnatp(sect.sct_own), pp->pln_own) != ALLIED)) {
1136 /* non-vtol plane */
1137 if ((pcp->pl_flags & P_V) == 0) {
1138 if ((sect.sct_type != SCT_AIRPT) || (sect.sct_effic < 40)) {
1145 if (pcp->pl_flags & P_A) {
1146 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
1153 putplane(pp->pln_uid, pp);
1158 * Arm only the planes at x,y
1162 mission_pln_arm(struct emp_qelem *list, coord x, coord y, int dist,
1163 int mission, struct ichrstr *ip, int flags,
1164 int mission_flags, int *tech)
1166 struct emp_qelem *qp;
1167 struct emp_qelem *next;
1172 for (qp = list->q_forw; qp != list; qp = next) {
1174 plp = (struct plist *)qp;
1176 if (plp->plane.pln_x != x)
1178 if (plp->plane.pln_y != y)
1181 if (mission_pln_equip(plp, ip, flags, mission) < 0) {
1186 if (flags & (P_S | P_I)) {
1187 if (plp->pcp->pl_flags & P_S)
1188 mission_flags |= P_S;
1189 if (plp->pcp->pl_flags & P_I)
1190 mission_flags |= P_I;
1192 if (*tech > plp->plane.pln_tech)
1193 *tech = plp->plane.pln_tech;
1194 if (!(plp->pcp->pl_flags & P_H))
1195 /* no stealth on this mission */
1196 mission_flags &= ~P_H;
1197 if (!(plp->pcp->pl_flags & P_X))
1198 /* no stealth on this mission */
1199 mission_flags &= ~P_X;
1200 if (!(plp->pcp->pl_flags & P_A)) {
1201 /* no asw on this mission */
1202 mission_flags &= ~P_A;
1204 if (!(plp->pcp->pl_flags & P_MINE)) {
1205 /* no asw on this mission */
1206 mission_flags &= ~P_MINE;
1210 * Mob costs for missions are 1/2 normal
1213 /* plp->plane.pln_mobil -= pln_mobcost(dist,&plp->plane,flags)/2;*/
1214 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
1217 return mission_flags;
1221 mission_pln_equip(struct plist *plp, struct ichrstr *ip, int flags,
1224 struct plchrstr *pcp;
1236 if (pp->pln_ship >= 0) {
1237 getship(pp->pln_ship, &ship);
1238 item = ship.shp_item;
1239 } else if (pp->pln_land >= 0) {
1240 getland(pp->pln_land, &land);
1241 item = land.lnd_item;
1243 getsect(pp->pln_x, pp->pln_y, §);
1244 item = sect.sct_item;
1246 if (pcp->pl_fuel > item[I_PETROL]) {
1249 item[I_PETROL] -= pcp->pl_fuel;
1251 if (!(flags & P_F)) {
1257 if (pp->pln_nuketype == -1) {
1259 needed = pp->pln_load;
1263 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1266 needed = (pp->pln_load * 2) / ip->i_lbs;
1269 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
1272 needed = (pp->pln_load * 2) / ip->i_lbs;
1275 if ((pcp->pl_flags & (P_V | P_C)) == 0)
1278 needed = pp->pln_load / ip->i_lbs;
1281 if (pp->pln_nuketype == -1)
1284 case 'i': /* missile interception */
1287 needed = pp->pln_load;
1293 if (rval < 0 || (itype != I_NONE && needed <= 0)) {
1296 if (itype != I_NONE) {
1297 if (itype == I_SHELL && item[itype] < needed)
1298 item[itype] += supply_commod(plp->plane.pln_own,
1302 if (item[itype] < needed)
1304 item[itype] -= needed;
1306 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
1307 plp->bombs = needed;
1311 if (pp->pln_ship >= 0)
1312 putship(ship.shp_uid, &ship);
1313 else if (pp->pln_land >= 0)
1314 putland(land.lnd_uid, &land);
1321 * Return 1 if this x,y pair is in the list
1324 find_airport(struct emp_qelem *airp, coord x, coord y)
1326 struct emp_qelem *qp;
1329 for (qp = airp->q_forw; qp != airp; qp = qp->q_forw) {
1330 a = (struct airport *)qp;
1331 if ((a->x == x) && (a->y == y))
1338 /* #*# This needs to be changed to include acc's -KHS */
1340 add_airport(struct emp_qelem *airp, coord x, coord y)
1345 a = malloc(sizeof(struct airport));
1349 getsect(x, y, §);
1350 a->own = sect.sct_own;
1352 emp_insque((struct emp_qelem *)a, airp);
1356 * Take all the planes in list 1 that
1357 * are at x,y, and put them into list 2.
1360 divide(struct emp_qelem *l1, struct emp_qelem *l2, coord x, coord y)
1362 struct emp_qelem *qp, *next;
1365 for (qp = l1->q_forw; qp != l1; qp = next) {
1367 plp = (struct plist *)qp;
1369 if (plp->plane.pln_x != x)
1371 if (plp->plane.pln_y != y)
1380 air_damage(struct emp_qelem *bombers, coord x, coord y, int mission,
1381 natid victim, char *s, int hardtarget)
1383 struct emp_qelem *qp;
1386 int newdam, dam = 0;
1390 for (qp = bombers->q_forw; qp != bombers; qp = qp->q_forw) {
1391 plp = (struct plist *)qp;
1394 if ((mission == MI_SINTERDICT) && !(plp->pcp->pl_flags & P_A))
1401 if (plp->pcp->pl_flags & P_A) {
1402 if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
1404 "\t%s detects sub movement in %s\n",
1405 prplane(pp), xyas(x, y, pp->pln_own));
1408 if (getrel(getnatp(pp->pln_own), victim) > HOSTILE) {
1410 "\t%s tracks %s %s at %s\n",
1411 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1415 "\t%s depth-charging %s %s in %s\n",
1416 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1419 "\t%s pinbombing %s %s in %s\n",
1420 prplane(pp), cname(victim), s, xyas(x, y, pp->pln_own));
1422 hitchance = pln_hitchance(pp, hardtarget, EF_SHIP);
1423 if (plp->plane.pln_nuketype != -1)
1425 else if (hardtarget != SECT_HARDTARGET)
1426 wu(0, pp->pln_own, "\t\t%d%% hitchance...", hitchance);
1427 /* Always calculate damage */
1428 if (roll(100) <= hitchance) {
1429 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
1431 if (mission == MI_INTERDICT) {
1433 "\t\tnuclear warhead on plane %s does %d damage to %s %s\n",
1434 prplane(pp), nukedam, cname(victim), s);
1439 "\t\thit %s %s for %d damage\n",
1440 cname(victim), s, newdam);
1444 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
1445 wu(0, pp->pln_own, "missed\n");
1446 if (mission == MI_SINTERDICT) {
1448 "RUMBLE... your sub in %s hears a depth-charge explode nearby\n",
1449 xyas(x, y, victim));
1450 } else if (*s == 's') {
1451 mpr(victim, "SPLASH! Bombs miss your %s in %s\n",
1452 s, xyas(x, y, victim));
1454 mpr(victim, "SPLAT! Bombs miss your %s in %s\n",
1455 s, xyas(x, y, victim));
1457 /* Now, even though we missed, the bombs
1459 collateral_damage(x, y, newdam, bombers);
1462 /* use up missiles */
1463 if (plp->pcp->pl_flags & P_M) {
1464 makelost(EF_PLANE, pp->pln_own, pp->pln_uid, pp->pln_x,
1474 * Check to see if anyone hostile to the victim
1475 * is running an air defense mission on this
1476 * sector. If so, do air combat
1479 air_defense(coord x, coord y, natid victim, struct emp_qelem *bomb_list,
1480 struct emp_qelem *esc_list)
1483 int mission_flags, tech, combat = 0, rel, dist, z;
1484 struct emp_qelem *qp, interceptors, airp, i, empty, *next;
1486 struct genlist *glp;
1488 struct genlist mi[MAXNOC];
1495 for (qp = bomb_list->q_forw; qp != bomb_list; qp = qp->q_forw)
1497 for (qp = esc_list->q_forw; qp != esc_list; qp = qp->q_forw)
1500 memset(mi, 0, sizeof(mi));
1501 for (z = 1; z < MAXNOC; z++)
1502 emp_initque((struct emp_qelem *)&mi[z]);
1504 build_mission_list_type(mi, x, y, MI_AIR_DEFENSE, EF_PLANE, victim);
1506 for (cn = 1; cn < MAXNOC; cn++) {
1507 /* Check our relations */
1508 rel = getrel(getnatp(cn), victim);
1513 if (QEMPTY(&mi[cn].queue))
1516 /* Ok, make a list of all the interceptors. Note that this *copies* the
1517 * list from the mission creation. This list must be deleted later. */
1518 emp_initque(&interceptors);
1519 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1521 glp = (struct genlist *)qp;
1524 dist = mapdist(x, y, gp->x, gp->y);
1526 plp = malloc(sizeof(struct plist));
1527 memset(plp, 0, sizeof(struct plist));
1529 memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
1531 /* missiles go one way, so we can use all the range */
1532 if (!(plp->pcp->pl_flags & P_M))
1534 /* If it's out of range, free it and continue on */
1535 if (dist > plp->plane.pln_range) {
1539 emp_insque(&plp->queue, &interceptors);
1542 /* Remove those who cannot go */
1543 mission_pln_sel(&interceptors, P_F, 0, SECT_HARDTARGET);
1545 if (QEMPTY(&interceptors))
1548 /* Now, delete all the extras, but delete the first ones, not the last ones, so
1549 * that the higher numbered planes go into battle (they should be the better ones
1550 * at fighting, if all went well.) */
1552 for (qp = interceptors.q_forw; qp != (&interceptors);
1555 tcount -= (count * 2);
1556 /* Just in case there are more incoming than we have */
1559 for (qp = interceptors.q_forw; qp != (&interceptors); qp = next) {
1563 /* Free it up and continue */
1565 glp = (struct genlist *)qp;
1570 /* Now, make a list of all the airports these planes are coming from */
1572 for (qp = interceptors.q_forw; qp != (&interceptors);
1574 plp = (struct plist *)qp;
1575 if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
1576 add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
1579 /* Now, fly them out one airport at a time */
1580 for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
1581 struct airport *air;
1583 air = (struct airport *)qp;
1584 dist = mapdist(x, y, air->x, air->y);
1588 /* Split off the interceptors at this base into i */
1589 divide(&interceptors, &i, air->x, air->y);
1593 mission_flags |= P_X; /* stealth (shhh) */
1594 /* gets turned off if not all choppers */
1595 mission_flags |= P_H;
1596 sam_intercept(bomb_list, &i, cn, victim, x, y, 0);
1597 sam_intercept(esc_list, &i, cn, victim, x, y, 1);
1599 /* Did we run out of interceptors? */
1602 /* Did we run out of bombers? */
1603 if (QEMPTY(bomb_list)) {
1604 /* Yes, so we have to put the rest of the interceptors back, and
1605 then continue, or we leak memory */
1610 mission_pln_arm(&i, air->x, air->y, 2 * dist, 'r', 0, P_F,
1611 mission_flags, &tech);
1613 /* Did we run out of interceptors? */
1616 /* Did we run out of bombers? */
1617 if (QEMPTY(bomb_list)) {
1618 /* Yes, so we have to put the rest of the interceptors back, and
1619 then continue, or we leak memory */
1624 path = BestAirPath(buf, air->x, air->y, x, y);
1625 if (CANT_HAPPEN(!path))
1627 wu(0, cn, "Flying %s mission from %s\n",
1628 mission_name(MI_AIR_DEFENSE), xyas(air->x, air->y, cn));
1629 if (air->own && (air->own != cn)) {
1630 wu(0, air->own, "%s is flying %s mission from %s\n",
1631 cname(cn), mission_name(MI_AIR_DEFENSE),
1632 xyas(air->x, air->y, air->own));
1635 /* Now, fly the planes to the sector */
1636 emp_initque(&empty);
1637 ac_encounter(&i, &empty, air->x, air->y,
1638 path, mission_flags, 1, bomb_list, esc_list);
1640 /* If none made it, continue */
1644 /* Some made it, so now they get to try to fight. */
1645 /* Intercept the escorts first */
1647 if (!QEMPTY(esc_list)) {
1648 mpr(victim, "%s air defense planes intercept!\n",
1650 ac_combat_headers(victim, cn);
1651 ac_airtoair(esc_list, &i);
1654 /* Now intercept the bombers */
1655 if (!QEMPTY(bomb_list)) {
1657 mpr(victim, "%s air defense planes intercept!\n",
1659 ac_combat_headers(victim, cn);
1661 ac_airtoair(bomb_list, &i);
1670 /* We have to free all of these, if they are still there, otherwise they get
1671 lost and we leak memory all over the place. */
1672 for (cn = 1; cn < MAXNOC; cn++) {
1673 /* free up all this memory if it's still there */
1674 for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
1676 glp = (struct genlist *)qp;