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 * plnsub.c: Plane subroutine stuff
30 * Known contributors to this file:
33 * Steve McClure, 1998-2000
34 * Markus Armbruster, 2004-2008
52 #include "prototypes.h"
57 static int pln_equip(struct plist *, struct ichrstr *, int, char);
58 static int fit_plane_on_ship(struct plnstr *, struct shpstr *);
61 * Get assembly point argument.
62 * If INPUT is not empty, use it, else prompt for more input using PROMPT.
63 * If this yields a valid assembly point, read it into *AP_SECT and
65 * Else complain and return NULL.
66 * *AP_SECT and BUF[1024] may be modified in either case.
69 get_assembly_point(char *input, struct sctstr *ap_sect, char *buf)
76 p = getstarg(input, "assembly point? ", buf);
79 if (!sarg_xy(p, &x, &y) || !getsect(x, y, ap_sect))
82 /* over own or allied sector is fine */
83 if (ap_sect->sct_own == player->cnum
84 || getrel(getnatp(ap_sect->sct_own), player->cnum) == ALLIED)
87 /* over own or allied ship is fine */
88 snxtitem_xy(&ni, EF_SHIP, x, y);
89 while (nxtitem(&ni, &ship)) {
90 if (ship.shp_effic < SHIP_MINEFF || ship.shp_own == 0)
92 if (ship.shp_own == player->cnum
93 || getrel(getnatp(ship.shp_own), player->cnum) == ALLIED)
97 pr("Assembly point not owned by you or an ally!\n");
102 pln_onewaymission(struct sctstr *target, int *shipno, int *flagp)
114 nships = carriersatxy(target->sct_x, target->sct_y, player->cnum);
117 if (!(p = getstarg(0, "Carrier #? ", buf)) || !*p)
121 || !getship(cno, &ship)
123 && (getrel(getnatp(ship.shp_own), player->cnum)
128 if (ship.shp_x != target->sct_x || ship.shp_y != target->sct_y) {
129 pr("Ship #%d not in %s\n", cno,
130 xyas(target->sct_x, target->sct_y, player->cnum));
133 fl = carrier_planes(&ship, 0);
135 pr("Can't land on %s.\n", prship(&ship));
138 /* clear to land on ship#CNO */
139 pr("landing on carrier %d\n", cno);
147 /* try to land at sector */
148 if (target->sct_own != player->cnum
149 && getrel(getnatp(target->sct_own), player->cnum) != ALLIED) {
150 pr("Nowhere to land at sector %s!\n",
151 xyas(target->sct_x, target->sct_y, player->cnum));
154 if (target->sct_type == SCT_MOUNT) {
155 pr("Nowhere to land at sector %s!\n",
156 xyas(target->sct_x, target->sct_y, player->cnum));
159 if (target->sct_type != SCT_AIRPT || target->sct_effic < 60)
162 /* clear to land at sector */
169 pln_oneway_to_carrier_ok(struct emp_qelem *bomb_list,
170 struct emp_qelem *esc_list, int cno)
172 struct emp_qelem *list, *qp;
176 if (cno < 0 || !getship(cno, &ship))
182 for (list = bomb_list;
184 list = list == bomb_list ? esc_list : NULL) {
185 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
186 plp = (struct plist *)qp;
187 if (plp->plane.pln_ship == ship.shp_uid)
189 if (!fit_plane_on_ship(&plp->plane, &ship))
197 pln_newlanding(struct emp_qelem *list, coord tx, coord ty, int cno)
199 struct emp_qelem *qp;
206 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
207 plp = (struct plist *)qp;
210 if (!could_be_on_ship(&plp->plane, &ship))
211 pr("\t%s cannot land on ship #%d! %s aborts!\n",
212 prplane(&plp->plane), cno, prplane(&plp->plane));
213 else if (!put_plane_on_ship(&plp->plane, &ship))
214 pr("\tNo room on ship #%d! %s aborts!\n",
215 cno, prplane(&plp->plane));
217 if (plp->plane.pln_own != ship.shp_own) {
218 /* plp->plane.pln_own = ship.shp_own;*/
219 wu(0, ship.shp_own, "%s %s lands on your %s\n",
220 cname(player->cnum), prplane(&plp->plane),
225 plp->plane.pln_x = tx;
226 plp->plane.pln_y = ty;
227 getsect(tx, ty, §);
228 if (plp->plane.pln_own != sect.sct_own) {
229 /* plp->plane.pln_own = sect.sct_own;*/
231 "%s %s lands at your sector %s\n",
233 prplane(&plp->plane), xyas(tx, ty, sect.sct_own));
235 plp->plane.pln_ship = cno;
239 putship(ship.shp_uid, &ship);
243 pln_dropoff(struct emp_qelem *list, struct ichrstr *ip, coord tx, coord ty,
246 struct emp_qelem *qp;
249 struct sctstr *sectp;
258 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
259 plp = (struct plist *)qp;
262 if (type == EF_SECTOR) {
264 if (!sectp->sct_own) {
265 if (sectp->sct_type == SCT_WATER)
266 pr("Your %s sink like a rock!\n", ip->i_name);
268 pr("Your %s vanish without a trace.\n", ip->i_name);
271 if (sectp->sct_own != player->cnum
272 && getrel(getnatp(sectp->sct_own), player->cnum) != ALLIED) {
273 pr("You don't own %s! Cargo jettisoned...\n",
274 xyas(tx, ty, player->cnum));
277 if (ip->i_uid == I_CIVIL && sectp->sct_own != sectp->sct_oldown) {
278 pr("%s is occupied. Your civilians suffer from identity crisis and die.\n",
279 xyas(tx, ty, player->cnum));
282 there = sectp->sct_item[ip->i_uid];
286 there = sp->shp_item[ip->i_uid];
287 mp = &mchr[(int)sp->shp_type];
288 max = mp->m_item[ip->i_uid];
292 pr("%d excess %s discarded\n", max - there, ip->i_name);
296 pr("%d %s landed safely", amt, ip->i_name);
297 if (type == EF_SECTOR) {
299 sectp->sct_item[ip->i_uid] = there;
300 if (sectp->sct_own != player->cnum)
301 wu(0, sectp->sct_own, "%s planes drop %d %s in %s\n",
302 cname(player->cnum), amt, ip->i_name,
303 xyas(sectp->sct_x, sectp->sct_y, sectp->sct_own));
304 pr(" at %s\n", xyas(tx, ty, player->cnum));
305 putsect((struct sctstr *)ptr);
307 struct shpstr *sp = (struct shpstr *)ptr;
308 sp->shp_item[ip->i_uid] = there;
309 if (sp->shp_own != player->cnum)
310 wu(0, sp->shp_own, "%s planes land %d %s on carrier %d\n",
311 cname(player->cnum), amt, ip->i_name, sp->shp_uid);
312 pr(" on carrier #%d\n", sp->shp_uid);
313 putship(sp->shp_uid, sp);
318 pln_mine(struct emp_qelem *list, struct sctstr *sectp)
320 struct emp_qelem *qp;
325 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
326 plp = (struct plist *)qp;
331 if (sectp->sct_type != SCT_WATER) {
332 pr("Your seamines have no effect here.\n");
335 sectp->sct_mines = MIN(sectp->sct_mines + amt, MINES_MAX);
336 pr("%d mines laid in %s.\n", amt,
337 xyas(sectp->sct_x, sectp->sct_y, player->cnum));
338 if (map_set(player->cnum, sectp->sct_x, sectp->sct_y, 'X', 0))
339 writemap(player->cnum);
345 * Has PP's type capabilities satisfying WANTFLAGS and NOWANTFLAGS?
346 * A plane type is capable unless
347 * - it lacks all of the P_F, P_ESC in WANTFLAGS, or
348 * - it lacks all of the P_E, P_L, P_K in WANTFLAGS, or
349 * - it lacks any of the other capabilities in WANTFLAGS, or
350 * - it has any of the capabilities in NOWANTFLAGS.
353 pln_capable(struct plnstr *pp, int wantflags, int nowantflags)
355 int flags = plchr[(int)pp->pln_type].pl_flags;
357 if (wantflags & (P_F | P_ESC)) {
358 if ((flags & wantflags & (P_F | P_ESC)) == 0)
360 wantflags &= ~(P_F | P_ESC);
363 if (wantflags & (P_E | P_L | P_K)) {
364 if ((flags & wantflags & (P_E | P_L | P_K)) == 0)
366 wantflags &= ~(P_E | P_L | P_K);
369 if ((flags & wantflags) != wantflags)
372 if (flags & nowantflags)
379 * Find plane types that can operate from carrier SP.
380 * If MSL find missile types, else non-missile types.
381 * Return a combination of P_L, P_K, P_E.
382 * It's zero if SP can't support air operations due to its type or
383 * state (low efficiency).
386 carrier_planes(struct shpstr *sp, int msl)
388 struct mchrstr *mcp = mchr + sp->shp_type;
391 if (sp->shp_effic < SHP_AIROPS_EFF)
395 if (mcp->m_flags & M_FLY)
397 if ((mcp->m_flags & M_MSL) && msl)
399 if (mcp->m_nchoppers && !msl)
407 pln_airbase_ok(struct plnstr *pp, int oneway, int noisy)
412 struct plchrstr *pcp = plchr + pp->pln_type;
414 if (CANT_HAPPEN(noisy && pp->pln_own != player->cnum))
417 if (pp->pln_ship >= 0) {
418 /* ship: needs to be own or allied, efficient */
419 if (!getship(pp->pln_ship, &ship)) {
423 if (ship.shp_own != pp->pln_own
424 && getrel(getnatp(ship.shp_own), pp->pln_own) != ALLIED) {
426 pr("(note) An ally does not own the ship %s is on\n",
430 if (!(carrier_planes(&ship, pcp->pl_flags & P_M) & pcp->pl_flags))
433 } else if (pp->pln_land >= 0) {
434 /* land: needs to be own or allied, efficient, not embarked */
435 if (!getland(pp->pln_land, &land)) {
439 if (land.lnd_own != pp->pln_own
440 && getrel(getnatp(land.lnd_own), pp->pln_own) != ALLIED) {
442 pr("(note) An ally does not own the unit %s is on\n",
446 if (land.lnd_effic < LND_AIROPS_EFF || !(pcp->pl_flags & P_E))
448 if (land.lnd_ship >= 0 || land.lnd_land >= 0)
452 /* sector: needs to be own or allied, efficient airfield */
453 if (!getsect(pp->pln_x, pp->pln_y, §)) {
458 if (sect.sct_own != pp->pln_own
459 && getrel(getnatp(sect.sct_own), pp->pln_own) != ALLIED) {
461 pr("(note) An ally does not own the sector %s is in\n",
465 /* need airfield unless VTOL */
466 if ((pcp->pl_flags & P_V) == 0) {
467 if (sect.sct_type != SCT_AIRPT) {
469 pr("%s not at airport\n", prplane(pp));
472 if (sect.sct_effic < 40) {
474 pr("%s is not 40%% efficient, %s can't take off from there.\n",
475 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
479 if (!oneway && sect.sct_effic < 60) {
481 pr("%s is not 60%% efficient, %s can't land there.\n",
482 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
493 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
494 int ap_to_target, int rangemult, int wantflags, int nowantflags)
498 struct plchrstr *pcp;
502 while (nxtitem(ni, &plane)) {
505 if (plane.pln_mobil <= 0)
508 if (ontradingblock(EF_PLANE, &plane)) {
509 pr("plane #%d inelligible - it's for sale.\n",
515 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
517 pr("%s too far from assembly point\n", prplane(&plane));
520 if (plane.pln_effic < 40) {
521 pr("%s not efficient enough (must be 40%%)\n",
525 range += ap_to_target;
527 pcp = &plchr[(int)plane.pln_type];
528 if (!pln_capable(&plane, wantflags, nowantflags))
530 if (plane.pln_range < range) {
531 pr("%s out of range (%d:%d)\n",
532 prplane(&plane), plane.pln_range, range);
535 if (!pln_airbase_ok(&plane, rangemult != 2, 1))
537 pr("%s standing by\n", prplane(&plane));
538 plane.pln_mission = 0;
539 putplane(plane.pln_uid, &plane);
540 plp = malloc(sizeof(struct plist));
545 emp_insque(&plp->queue, list);
550 pln_arm(struct emp_qelem *list, int dist, char mission, struct ichrstr *ip,
551 int flags, int mission_flags)
553 struct emp_qelem *qp;
554 struct emp_qelem *next;
557 for (qp = list->q_forw; qp != list; qp = next) {
559 plp = (struct plist *)qp;
560 if (pln_equip(plp, ip, flags, mission) < 0) {
565 if (flags & (P_S | P_I)) {
566 if (plp->pcp->pl_flags & P_S)
567 mission_flags |= P_S;
568 if (plp->pcp->pl_flags & P_I)
569 mission_flags |= P_I;
571 if (!(plp->pcp->pl_flags & P_H))
572 /* no stealth on this mission */
573 mission_flags &= ~P_H;
574 if (!(plp->pcp->pl_flags & P_X))
575 /* no stealth on this mission */
576 mission_flags &= ~P_X;
577 if (!(plp->pcp->pl_flags & P_A)) {
578 /* no asw on this mission */
579 mission_flags &= ~P_A;
580 /* FIXME escorts turn ASW patrol into ordinary recon */
582 if (!(plp->pcp->pl_flags & P_MINE)) {
583 /* no asw on this mission */
584 mission_flags &= ~P_MINE;
585 /* FIXME no effect */
587 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
588 pr("%s equipped\n", prplane(&plp->plane));
590 return mission_flags;
594 pln_equip(struct plist *plp, struct ichrstr *ip, int flags, char mission)
596 struct plchrstr *pcp;
610 if (pp->pln_ship >= 0) {
611 getship(pp->pln_ship, &ship);
612 item = ship.shp_item;
614 } else if (pp->pln_land >= 0) {
615 getland(pp->pln_land, &land);
616 item = land.lnd_item;
619 getsect(pp->pln_x, pp->pln_y, §);
620 item = sect.sct_item;
621 own = sect.sct_oldown;
624 if (ip->i_uid == I_CIVIL) {
625 if (pp->pln_own != own) {
626 pr("You don't control those civilians!\n");
631 if (pcp->pl_fuel > item[I_PETROL]) {
632 pr("%s not enough petrol there!\n", prplane(pp));
635 item[I_PETROL] -= pcp->pl_fuel;
637 if ((flags & P_F) == 0) {
644 if (pp->pln_nuketype == -1) {
651 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
654 needed = (load * 2) / ip->i_lbs;
657 if ((pcp->pl_flags & P_MINE) == 0)
660 needed = (load * 2) / ip->i_lbs;
663 if ((pcp->pl_flags & (P_V | P_C)) == 0)
666 needed = load / ip->i_lbs;
669 if (pp->pln_nuketype == -1)
675 if (rval < 0 || (itype != I_NONE && needed <= 0)) {
676 pr("%s can't contribute to mission\n", prplane(pp));
679 if (itype != I_NONE) {
681 /* Supply is broken somewhere, so don't use it for now */
682 if (itype == I_SHELL && item[itype] < needed)
683 item[itype] += supply_commod(plp->plane.pln_own,
688 abandon_needed = !!would_abandon(§, itype, needed, NULL);
689 if (item[itype] < needed + abandon_needed) {
690 pr("Not enough %s for %s\n", ichr[itype].i_name, prplane(pp));
693 item[itype] -= needed;
695 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
700 if (pp->pln_ship >= 0) {
701 if (pp->pln_own != ship.shp_own) {
703 "%s %s prepares for takeoff from ship %s\n",
704 cname(pp->pln_own), prplane(pp), prship(&ship));
706 putship(ship.shp_uid, &ship);
707 } else if (pp->pln_land >= 0) {
708 if (pp->pln_own != land.lnd_own) {
710 "%s %s prepares for takeoff from unit %s\n",
711 cname(pp->pln_own), prplane(pp), prland(&land));
713 putland(land.lnd_uid, &land);
715 if (pp->pln_own != sect.sct_own) {
716 wu(0, sect.sct_own, "%s %s prepares for takeoff from %s\n",
717 cname(pp->pln_own), prplane(pp),
718 xyas(sect.sct_x, sect.sct_y, sect.sct_own));
726 pln_put(struct emp_qelem *list)
728 struct emp_qelem *qp, *next;
730 for (qp = list->q_forw; qp != list; qp = next) {
732 pln_put1((struct plist *)qp);
737 pln_put1(struct plist *plp)
747 if (pp->pln_ship >= 0) {
748 getship(pp->pln_ship, &ship);
749 take_plane_off_ship(pp, &ship);
751 if (pp->pln_land >= 0) {
752 getland(pp->pln_land, &land);
753 take_plane_off_land(pp, &land);
755 } else if (pp->pln_ship >= 0) {
756 /* It is landing on a carrier */
757 getship(pp->pln_ship, &ship);
758 /* We should do more, like make sure it's really
759 a carrier, etc. but for now just make sure it's
761 if (ship.shp_effic < SHIP_MINEFF) {
763 "Ship #%d has been sunk, plane #%d has nowhere to land, and\n"
764 "splashes into the sea.\n",
765 pp->pln_ship, pp->pln_uid);
769 /* Presume we are landing back in a sector. */
770 getsect(pp->pln_x, pp->pln_y, §);
771 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
773 "Nowhere to land at %s, plane #%d crashes and burns...\n",
774 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
778 putplane(pp->pln_uid, pp);
779 emp_remque(&plp->queue);
784 pln_removedupes(struct emp_qelem *bomb_list, struct emp_qelem *esc_list)
786 struct emp_qelem *bomb;
787 struct emp_qelem *esc;
791 if (QEMPTY(bomb_list) || QEMPTY(esc_list))
793 bomb = bomb_list->q_forw;
794 while (bomb != bomb_list) {
795 if (QEMPTY(esc_list)) {
799 esc = esc_list->q_forw;
800 bombp = (struct plist *)bomb;
801 while (esc != esc_list) {
802 escp = (struct plist *)esc;
803 if (escp->plane.pln_uid == bombp->plane.pln_uid) {
815 * Fit a plane of PP's type on ship SP.
816 * Adjust SP's plane counters.
817 * Updating the plane accordingly is the caller's job.
818 * Return whether it fits.
821 fit_plane_on_ship(struct plnstr *pp, struct shpstr *sp)
823 struct plchrstr *pcp = plchr + pp->pln_type;
824 struct mchrstr *mcp = mchr + sp->shp_type;
827 if (pcp->pl_flags & P_K) {
828 /* chopper, try chopper slot first */
829 if (sp->shp_nchoppers < mcp->m_nchoppers)
830 return ++sp->shp_nchoppers;
831 /* else try plane slot */
833 } else if (pcp->pl_flags & P_E) {
834 /* x-light, try x-light slot first */
835 if (sp->shp_nxlight < mcp->m_nxlight)
836 return ++sp->shp_nxlight;
837 /* else try plane slot */
838 wanted = M_MSL | M_FLY;
839 } else if (!(pcp->pl_flags & P_L)) {
840 /* not light, no go */
842 } else if (pcp->pl_flags & P_M) {
843 /* missile, use plane slot */
844 wanted = M_MSL | M_FLY;
846 /* fixed-wing plane, use plane slot */
850 if ((mcp->m_flags & wanted) == 0)
851 return 0; /* ship not capable */
853 if (sp->shp_nplane < mcp->m_nplanes)
854 return ++sp->shp_nplane;
860 * Fit a plane of PP's type off ship SP.
861 * Adjust SP's plane counters, badly. You need to run count_planes()
862 * before the next fit_plane_on_ship().
863 * Updating the plane accordingly is the caller's job.
866 fit_plane_off_ship(struct plnstr *pp, struct shpstr *sp)
869 * Frees chopper and nxlight slots first, which is why we need to
870 * run count_planes() before fit_plane_on_ship().
872 struct plchrstr *pcp = plchr + pp->pln_type;
874 if (pcp->pl_flags & P_K) {
875 if (sp->shp_nchoppers) {
879 } else if (pcp->pl_flags & P_E) {
880 if (sp->shp_nxlight) {
886 if (CANT_HAPPEN(sp->shp_nplane == 0))
892 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
894 if (plane->pln_ship == ship->shp_uid)
895 return 1; /* Already on ship */
897 if (!fit_plane_on_ship(plane, ship))
900 plane->pln_x = ship->shp_x;
901 plane->pln_y = ship->shp_y;
902 plane->pln_ship = ship->shp_uid;
903 putplane(plane->pln_uid, plane);
904 putship(ship->shp_uid, ship);
909 take_plane_off_ship(struct plnstr *plane, struct shpstr *ship)
911 if (CANT_HAPPEN(plane->pln_ship != ship->shp_uid))
914 fit_plane_off_ship(plane, ship);
915 plane->pln_ship = -1;
916 putship(ship->shp_uid, ship);
917 putplane(plane->pln_uid, plane);
921 * Fit a plane of PP's type on land unit LP.
922 * Adjust LP's plane counters.
923 * Updating the plane accordingly is the caller's job.
924 * Return whether it fits.
927 fit_plane_on_land(struct plnstr *pp, struct lndstr *lp)
929 struct plchrstr *pcp = plchr + pp->pln_type;
930 struct lchrstr *lcp = lchr + lp->lnd_type;
932 if ((pcp->pl_flags & P_E) && lp->lnd_nxlight < lcp->l_nxlight)
933 return ++lp->lnd_nxlight;
939 * Fit a plane of PP's type off land unit LP.
940 * Adjust LP's plane counters.
941 * Updating the plane accordingly is the caller's job.
944 fit_plane_off_land(struct plnstr *pp, struct lndstr *lp)
946 if (CANT_HAPPEN(lp->lnd_nxlight == 0))
952 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
954 if (plane->pln_land == land->lnd_uid)
955 return 1; /* Already on unit */
957 if (!fit_plane_on_land(plane, land))
960 plane->pln_x = land->lnd_x;
961 plane->pln_y = land->lnd_y;
962 plane->pln_land = land->lnd_uid;
963 putplane(plane->pln_uid, plane);
964 putland(land->lnd_uid, land);
969 take_plane_off_land(struct plnstr *plane, struct lndstr *land)
971 if (CANT_HAPPEN(plane->pln_land != land->lnd_uid))
974 fit_plane_off_land(plane, land);
975 plane->pln_land = -1;
976 putland(land->lnd_uid, land);
977 putplane(plane->pln_uid, plane);
981 * Could a plane of PP's type be on on ship SP?
984 could_be_on_ship(struct plnstr *pp, struct shpstr *sp)
989 ship.shp_nplane = ship.shp_nchoppers = ship.shp_nxlight = 0;
990 return fit_plane_on_ship(pp, &ship);
994 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
997 struct plchrstr *pcp;
998 struct emp_qelem *qp;
999 struct emp_qelem *next;
1005 getsect(x, y, §);
1006 mines_there = sect.sct_mines;
1008 if (mines_there == 0)
1011 if ((sect.sct_type != SCT_WATER) && (sect.sct_type != SCT_HARBR))
1014 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
1017 ip = (struct plist *)qp;
1020 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
1023 if (chance((100.0 - pln_acc(pp)) / 100.0)) {
1024 pr("Sweep! in %s\n",
1025 xyas(sect.sct_x, sect.sct_y, pp->pln_own));
1031 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
1032 writemap(player->cnum);
1033 sect.sct_mines = mines_there;
1038 count_planes(struct shpstr *sp)
1040 struct nstr_item ni;
1041 struct plnstr plane;
1042 int nplane, nchoppers, nxlight;
1044 if (sp->shp_effic < SHIP_MINEFF)
1047 nplane = sp->shp_nplane;
1049 nchoppers = sp->shp_nchoppers;
1050 sp->shp_nchoppers = 0;
1051 nxlight = sp->shp_nxlight;
1052 sp->shp_nxlight = 0;
1054 snxtitem_xy(&ni, EF_PLANE, sp->shp_x, sp->shp_y);
1055 while (nxtitem(&ni, &plane)) {
1056 if (plane.pln_own == 0)
1058 if (plane.pln_ship == sp->shp_uid) {
1059 if (!fit_plane_on_ship(&plane, sp))
1064 if (nplane != sp->shp_nplane ||
1065 nxlight != sp->shp_nxlight || nchoppers != sp->shp_nchoppers) {
1066 putship(sp->shp_uid, sp);
1071 count_land_planes(struct lndstr *lp)
1073 struct nstr_item ni;
1074 struct plnstr plane;
1077 if (lp->lnd_effic < LAND_MINEFF)
1080 nplane = lp->lnd_nxlight;
1081 lp->lnd_nxlight = 0;
1083 snxtitem_all(&ni, EF_PLANE);
1084 while (nxtitem(&ni, &plane)) {
1085 if (plane.pln_own == 0)
1087 if (plane.pln_land == lp->lnd_uid)
1088 if (!fit_plane_on_land(&plane, lp))
1092 if (lp->lnd_nxlight != nplane)
1093 putland(lp->lnd_uid, lp);
1097 count_sect_planes(struct sctstr *sp)
1100 struct nstr_item ni;
1101 struct plnstr plane;
1103 snxtitem_all(&ni, EF_PLANE);
1104 while (nxtitem(&ni, &plane)) {
1107 if (plane.pln_flags & PLN_LAUNCHED)
1109 if (plane.pln_x == sp->sct_x && plane.pln_y == sp->sct_y)
1117 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
1119 struct plchrstr *pcp = plchr + pp->pln_type;
1120 double tfact = (double)(pp->pln_tech - pcp->pl_tech) /
1121 (pp->pln_tech - pcp->pl_tech / 2);
1122 int acc = pln_acc(pp);
1125 if (type == EF_SHIP) {
1126 if (pcp->pl_flags & P_A)
1128 if (!(pcp->pl_flags & P_T))
1131 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
1132 (1.0 - acc / 100.0)) - hardtarget;
1134 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
1136 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
1137 if (hitchance > 100)
1142 /* return 0 if there was a nuclear detonation */
1145 pln_damage(struct plnstr *pp, coord x, coord y, char type, int *nukedamp,
1149 struct plchrstr *pcp = plchr + pp->pln_type;
1157 if (pp->pln_nuketype != -1) {
1158 if (nuk_on_plane(&nuke, pp->pln_uid) >= 0) {
1159 mpr(pp->pln_own, "Releasing RV's for %s detonation...\n",
1160 pp->pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
1161 pp->pln_nuketype = -1;
1162 *nukedamp = detonate(&nuke, x, y,
1163 pp->pln_flags & PLN_AIRBURST);
1170 load = pln_load(pp);
1171 if (!load) /* e.g. ab, blowing up on launch pad */
1178 if (pcp->pl_flags & P_M) {
1179 if (pcp->pl_flags & P_MAR)
1181 } else if (pcp->pl_flags & P_T)
1186 effective = !pinbomber;
1187 aim = 30 + (pinbomber ? aim : 100 - aim);
1189 effective = pinbomber;
1195 hitroll = roll(100);
1196 if (hitroll >= 90) {
1199 mpr(pp->pln_own, "BLAM");
1200 } else if (hitroll < aim) {
1203 mpr(pp->pln_own, "Blam");
1207 mpr(pp->pln_own, "blam");
1210 mpr(pp->pln_own, "-");
1213 mpr(pp->pln_own, "\n");
1220 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1223 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1224 return (int)(100 - 100 * misschance * misschance);
1228 pln_mobcost(int dist, struct plnstr *pp, int flags)
1232 cost = 20.0 / (pp->pln_effic / 100.0);
1233 if ((flags & P_F) || (flags & P_ESC))
1236 return ldround(cost * dist / pln_range_max(pp) + 5, 1);
1240 * Set PP's tech to TLEV along with everything else that depends on it.
1243 pln_set_tech(struct plnstr *pp, int tlev)
1245 struct plchrstr *pcp = plchr + pp->pln_type;
1246 int limited_range = pp->pln_range < pln_range_max(pp);
1249 if (CANT_HAPPEN(tlev < pcp->pl_tech))
1250 tlev = pcp->pl_tech;
1251 pp->pln_tech = tlev;
1253 range_max = pln_range_max(pp);
1254 if (!limited_range || pp->pln_range > range_max)
1255 pp->pln_range = range_max;