2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2007, 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, 2004-2005
53 #include "prototypes.h"
58 static int pln_equip(struct plist *, struct ichrstr *, int, char);
59 static int fit_plane_on_ship(struct plnstr *, struct shpstr *);
62 * Get assembly point argument.
63 * If INPUT is not empty, use it, else prompt for more input using PROMPT.
64 * If this yields a valid assembly point, read it into *AP_SECT and
66 * Else complain and return NULL.
67 * *AP_SECT and BUF[1024] may be modified in either case.
70 get_assembly_point(char *input, struct sctstr *ap_sect, char *buf)
77 p = getstarg(input, "assembly point? ", buf);
80 if (!sarg_xy(p, &x, &y) || !getsect(x, y, ap_sect))
83 /* over own or allied sector is fine */
84 if (ap_sect->sct_own == player->cnum
85 || getrel(getnatp(ap_sect->sct_own), player->cnum) == ALLIED)
88 /* over own or allied ship is fine */
89 snxtitem_xy(&ni, EF_SHIP, x, y);
90 while (nxtitem(&ni, &ship)) {
91 if (ship.shp_effic < SHIP_MINEFF || ship.shp_own == 0)
93 if (ship.shp_own == player->cnum
94 || getrel(getnatp(ship.shp_own), player->cnum) == ALLIED)
98 pr("Assembly point not owned by you or an ally!\n");
103 pln_onewaymission(struct sctstr *target, int *shipno, int *flagp)
115 nships = carriersatxy(target->sct_x, target->sct_y,
116 M_FLY | M_CHOPPER, 0, player->cnum);
119 if (!(p = getstarg(0, "Carrier #? ", buf)) || !*p)
123 || !getship(cno, &ship)
125 && (getrel(getnatp(ship.shp_own), player->cnum)
130 if (ship.shp_x != target->sct_x || ship.shp_y != target->sct_y) {
131 pr("Ship #%d not in %s\n", cno,
132 xyas(target->sct_x, target->sct_y, player->cnum));
135 if ((!(mchr[(int)ship.shp_type].m_flags & M_FLY)
136 && !(mchr[(int)ship.shp_type].m_flags & M_XLIGHT)
137 && !(mchr[(int)ship.shp_type].m_flags & M_CHOPPER))
138 || ship.shp_effic < SHP_AIROPS_EFF) {
139 pr("Can't land on %s.\n", prship(&ship));
143 /* clear to land on ship#CNO */
144 pr("landing on carrier %d\n", cno);
145 if (mchr[(int)ship.shp_type].m_flags & M_FLY)
147 if (mchr[(int)ship.shp_type].m_flags & M_CHOPPER)
149 if (mchr[(int)ship.shp_type].m_flags & M_XLIGHT)
157 /* try to land at sector */
158 if (target->sct_own != player->cnum
159 && getrel(getnatp(target->sct_own), player->cnum) != ALLIED) {
160 pr("Nowhere to land at sector %s!\n",
161 xyas(target->sct_x, target->sct_y, player->cnum));
164 if (target->sct_type == SCT_MOUNT) {
165 pr("Nowhere to land at sector %s!\n",
166 xyas(target->sct_x, target->sct_y, player->cnum));
169 if (target->sct_type != SCT_AIRPT || target->sct_effic < 60)
172 /* clear to land at sector */
179 pln_oneway_to_carrier_ok(struct emp_qelem *bomb_list,
180 struct emp_qelem *esc_list, int cno)
182 struct emp_qelem *list, *qp;
186 if (cno < 0 || !getship(cno, &ship))
192 for (list = bomb_list;
194 list = list == bomb_list ? esc_list : NULL) {
195 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
196 plp = (struct plist *)qp;
197 if (plp->plane.pln_ship == ship.shp_uid)
199 if (!fit_plane_on_ship(&plp->plane, &ship))
207 pln_newlanding(struct emp_qelem *list, coord tx, coord ty, int cno)
209 struct emp_qelem *qp;
216 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
217 plp = (struct plist *)qp;
220 if (!could_be_on_ship(&plp->plane, &ship))
221 pr("\t%s cannot land on ship #%d! %s aborts!\n",
222 prplane(&plp->plane), cno, prplane(&plp->plane));
223 else if (!put_plane_on_ship(&plp->plane, &ship))
224 pr("\tNo room on ship #%d! %s aborts!\n",
225 cno, prplane(&plp->plane));
227 if (plp->plane.pln_own != ship.shp_own) {
228 /* plp->plane.pln_own = ship.shp_own;*/
229 wu(0, ship.shp_own, "%s %s lands on your %s\n",
230 cname(player->cnum), prplane(&plp->plane),
235 plp->plane.pln_x = tx;
236 plp->plane.pln_y = ty;
237 getsect(tx, ty, §);
238 if (plp->plane.pln_own != sect.sct_own) {
239 /* plp->plane.pln_own = sect.sct_own;*/
241 "%s %s lands at your sector %s\n",
243 prplane(&plp->plane), xyas(tx, ty, sect.sct_own));
245 plp->plane.pln_ship = cno;
249 putship(ship.shp_uid, &ship);
253 pln_dropoff(struct emp_qelem *list, struct ichrstr *ip, coord tx, coord ty,
256 struct emp_qelem *qp;
259 struct sctstr *sectp;
268 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
269 plp = (struct plist *)qp;
272 if (type == EF_SECTOR) {
274 if (!sectp->sct_own) {
275 if (sectp->sct_type == SCT_WATER)
276 pr("Your %s sink like a rock!\n", ip->i_name);
278 pr("Your %s vanish without a trace.\n", ip->i_name);
281 if (sectp->sct_own != player->cnum
282 && getrel(getnatp(sectp->sct_own), player->cnum) != ALLIED) {
283 pr("You don't own %s! Cargo jettisoned...\n",
284 xyas(tx, ty, player->cnum));
287 if (ip->i_uid == I_CIVIL && sectp->sct_own != sectp->sct_oldown) {
288 pr("%s is occupied. Your civilians suffer from identity crisis and die.\n",
289 xyas(tx, ty, player->cnum));
292 there = sectp->sct_item[ip->i_uid];
296 there = sp->shp_item[ip->i_uid];
297 mp = &mchr[(int)sp->shp_type];
298 max = mp->m_item[ip->i_uid];
302 pr("%d excess %s discarded\n", max - there, ip->i_name);
306 pr("%d %s landed safely", amt, ip->i_name);
307 if (type == EF_SECTOR) {
309 sectp->sct_item[ip->i_uid] = there;
310 if (sectp->sct_own != player->cnum)
311 wu(0, sectp->sct_own, "%s planes drop %d %s in %s\n",
312 cname(player->cnum), amt, ip->i_name,
313 xyas(sectp->sct_x, sectp->sct_y, sectp->sct_own));
314 pr(" at %s\n", xyas(tx, ty, player->cnum));
315 putsect((struct sctstr *)ptr);
317 struct shpstr *sp = (struct shpstr *)ptr;
318 sp->shp_item[ip->i_uid] = there;
319 if (sp->shp_own != player->cnum)
320 wu(0, sp->shp_own, "%s planes land %d %s on carrier %d\n",
321 cname(player->cnum), amt, ip->i_name, sp->shp_uid);
322 pr(" on carrier #%d\n", sp->shp_uid);
323 putship(sp->shp_uid, sp);
328 pln_mine(struct emp_qelem *list, struct sctstr *sectp)
330 struct emp_qelem *qp;
335 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
336 plp = (struct plist *)qp;
341 if (sectp->sct_type != SCT_WATER) {
342 pr("Your seamines have no effect here.\n");
345 sectp->sct_mines = MIN(sectp->sct_mines + amt, MINES_MAX);
346 pr("%d mines laid in %s.\n", amt,
347 xyas(sectp->sct_x, sectp->sct_y, player->cnum));
348 if (map_set(player->cnum, sectp->sct_x, sectp->sct_y, 'X', 0))
349 writemap(player->cnum);
355 * Has PP's type capabilities satisfying WANTFLAGS and NOWANTFLAGS?
356 * A plane type is capable unless
357 * - it lacks all of the P_F, P_ESC in WANTFLAGS, or
358 * - it lacks all of the P_E, P_L, P_K in WANTFLAGS, or
359 * - it lacks any of the other capabilities in WANTFLAGS, or
360 * - it has any of the capabilities in NOWANTFLAGS.
363 pln_capable(struct plnstr *pp, int wantflags, int nowantflags)
365 int flags = plchr[(int)pp->pln_type].pl_flags;
367 if (wantflags & (P_F | P_ESC)) {
368 if ((flags & wantflags & (P_F | P_ESC)) == 0)
370 wantflags &= ~(P_F | P_ESC);
373 if (wantflags & (P_E | P_L | P_K)) {
374 if ((flags & wantflags & (P_E | P_L | P_K)) == 0)
376 wantflags &= ~(P_E | P_L | P_K);
379 if ((flags & wantflags) != wantflags)
382 if (flags & nowantflags)
389 pln_airbase_ok(struct plnstr *pp, int oneway)
394 struct plchrstr *pcp = plchr + pp->pln_type;
396 if (CANT_HAPPEN(pp->pln_own != player->cnum))
399 if (pp->pln_ship >= 0) {
400 if (!getship(pp->pln_ship, &ship)) {
404 if (CANT_HAPPEN(ship.shp_effic < SHIP_MINEFF
405 || !could_be_on_ship(pp, &ship)))
408 if (ship.shp_effic < SHP_AIROPS_EFF)
410 /* Can't fly off non-owned ships or non-allied ship */
411 if ((ship.shp_own != player->cnum) &&
412 (getrel(getnatp(ship.shp_own), player->cnum) != ALLIED)) {
413 pr("(note) An ally does not own the ship %s is on\n",
418 } else if (pp->pln_land >= 0) {
419 if (!getland(pp->pln_land, &land)) {
423 if (CANT_HAPPEN(land.lnd_effic < LAND_MINEFF
424 || !(pcp->pl_flags & P_E)))
427 if (land.lnd_effic < LND_AIROPS_EFF)
429 /* Can't fly off units in ships or other units */
430 if ((land.lnd_ship >= 0) || (land.lnd_land >= 0))
432 /* Can't fly off non-owned units or non-allied unit */
433 if ((land.lnd_own != player->cnum) &&
434 (getrel(getnatp(land.lnd_own), player->cnum) != ALLIED)) {
435 pr("(note) An ally does not own the unit %s is on\n",
441 if (!getsect(pp->pln_x, pp->pln_y, §)) {
445 /* First, check allied status */
446 /* Can't fly from non-owned sectors or non-allied sectors */
447 if ((sect.sct_own != player->cnum) &&
448 (getrel(getnatp(sect.sct_own), player->cnum) != ALLIED)) {
449 pr("(note) An ally does not own the sector %s is in\n",
454 if ((pcp->pl_flags & P_V) == 0) {
455 if (sect.sct_type != SCT_AIRPT) {
456 pr("%s not at airport\n", prplane(pp));
459 if (sect.sct_effic < 40) {
460 pr("%s is not 40%% efficient, %s can't take off from there.\n", xyas(sect.sct_x, sect.sct_y, pp->pln_own), prplane(pp));
463 if (!oneway && sect.sct_effic < 60) {
464 pr("%s is not 60%% efficient, %s can't land there.\n",
465 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
476 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
477 int ap_to_target, int rangemult, int wantflags, int nowantflags)
481 struct plchrstr *pcp;
488 while (nxtitem(ni, &plane)) {
491 if (plane.pln_mobil <= 0)
494 if (ontradingblock(EF_PLANE, &plane)) {
495 pr("plane #%d inelligible - it's for sale.\n",
501 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
503 pr("%s too far from assembly point\n", prplane(&plane));
506 if (plane.pln_effic < 40) {
507 pr("%s not efficient enough (must be 40%%)\n",
511 range += ap_to_target;
513 pcp = &plchr[(int)plane.pln_type];
514 if (!pln_capable(&plane, wantflags, nowantflags))
516 if (plane.pln_range < range) {
517 pr("%s out of range (%d:%d)\n",
518 prplane(&plane), plane.pln_range, range);
521 if (!pln_airbase_ok(&plane, rangemult != 2))
523 pr("%s standing by\n", prplane(&plane));
524 plane.pln_mission = 0;
525 putplane(plane.pln_uid, &plane);
526 plp = malloc(sizeof(struct plist));
531 emp_insque(&plp->queue, list);
536 pln_arm(struct emp_qelem *list, int dist, char mission, struct ichrstr *ip,
537 int flags, int mission_flags)
539 struct emp_qelem *qp;
540 struct emp_qelem *next;
543 for (qp = list->q_forw; qp != list; qp = next) {
545 plp = (struct plist *)qp;
546 if (pln_equip(plp, ip, flags, mission) < 0) {
551 if (flags & (P_S | P_I)) {
552 if (plp->pcp->pl_flags & P_S)
553 mission_flags |= P_S;
554 if (plp->pcp->pl_flags & P_I)
555 mission_flags |= P_I;
557 if (!(plp->pcp->pl_flags & P_H))
558 /* no stealth on this mission */
559 mission_flags &= ~P_H;
560 if (!(plp->pcp->pl_flags & P_X))
561 /* no stealth on this mission */
562 mission_flags &= ~P_X;
563 if (!(plp->pcp->pl_flags & P_A)) {
564 /* no asw on this mission */
565 mission_flags &= ~P_A;
566 /* FIXME escorts turn ASW patrol into ordinary recon */
568 if (!(plp->pcp->pl_flags & P_MINE)) {
569 /* no asw on this mission */
570 mission_flags &= ~P_MINE;
571 /* FIXME no effect */
573 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
574 pr("%s equipped\n", prplane(&plp->plane));
576 return mission_flags;
580 pln_equip(struct plist *plp, struct ichrstr *ip, int flags, char mission)
582 struct plchrstr *pcp;
596 if (pp->pln_ship >= 0) {
597 getship(pp->pln_ship, &ship);
598 item = ship.shp_item;
600 } else if (pp->pln_land >= 0) {
601 getland(pp->pln_land, &land);
602 item = land.lnd_item;
605 getsect(pp->pln_x, pp->pln_y, §);
606 item = sect.sct_item;
607 own = sect.sct_oldown;
610 if (ip->i_uid == I_CIVIL) {
611 if (pp->pln_own != own) {
612 pr("You don't control those civilians!\n");
617 if (pcp->pl_fuel > item[I_PETROL]) {
618 pr("%s not enough petrol there!\n", prplane(pp));
621 item[I_PETROL] -= pcp->pl_fuel;
623 if ((flags & P_F) == 0) {
629 if (pp->pln_nuketype == -1) {
631 needed = pp->pln_load;
636 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
639 needed = (pp->pln_load * 2) / ip->i_lbs;
642 if ((pcp->pl_flags & P_MINE) == 0)
645 needed = (pp->pln_load * 2) / ip->i_lbs;
648 if ((pcp->pl_flags & (P_V | P_C)) == 0)
651 needed = pp->pln_load / ip->i_lbs;
654 if (pp->pln_nuketype == -1)
660 if (rval < 0 || (itype != I_NONE && needed <= 0)) {
661 pr("%s can't contribute to mission\n", prplane(pp));
664 if (itype != I_NONE) {
666 /* Supply is broken somewhere, so don't use it for now */
667 if (itype == I_SHELL && item[itype] < needed)
668 item[itype] += supply_commod(plp->plane.pln_own,
673 abandon_needed = !!would_abandon(§, itype, needed, NULL);
674 if (item[itype] < needed + abandon_needed) {
675 pr("Not enough %s for %s\n", ichr[itype].i_name, prplane(pp));
678 item[itype] -= needed;
680 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
685 if (pp->pln_ship >= 0) {
686 if (pp->pln_own != ship.shp_own) {
688 "%s %s prepares for takeoff from ship %s\n",
689 cname(pp->pln_own), prplane(pp), prship(&ship));
691 putship(ship.shp_uid, &ship);
692 } else if (pp->pln_land >= 0) {
693 if (pp->pln_own != land.lnd_own) {
695 "%s %s prepares for takeoff from unit %s\n",
696 cname(pp->pln_own), prplane(pp), prland(&land));
698 putland(land.lnd_uid, &land);
700 if (pp->pln_own != sect.sct_own) {
701 wu(0, sect.sct_own, "%s %s prepares for takeoff from %s\n",
702 cname(pp->pln_own), prplane(pp),
703 xyas(sect.sct_x, sect.sct_y, sect.sct_own));
711 pln_put(struct emp_qelem *list)
713 struct emp_qelem *qp;
714 struct emp_qelem *newqp;
720 /* Here is where planes return home from bombing runs.
721 We need to make sure they still have somewhere to return
725 plp = (struct plist *)qp;
727 /* Ok, check out where it wants to land */
728 if (pp->pln_ship >= 0) {
729 /* It is landing on a carrier */
730 getship(pp->pln_ship, &ship);
731 /* We should do more, like make sure it's really
732 a carrier, etc. but for now just make sure it's
734 if (ship.shp_effic < SHIP_MINEFF) {
736 "Ship #%d has been sunk, plane #%d has nowhere to land, and\n"
737 "splashes into the sea.\n",
738 pp->pln_ship, pp->pln_uid);
742 /* Presume we are landing back in a sector. */
743 getsect(pp->pln_x, pp->pln_y, §);
744 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
746 "Nowhere to land at %s, plane #%d crashes and burns...\n",
747 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
751 putplane(pp->pln_uid, pp);
760 pln_removedupes(struct emp_qelem *bomb_list, struct emp_qelem *esc_list)
762 struct emp_qelem *bomb;
763 struct emp_qelem *esc;
767 if (QEMPTY(bomb_list) || QEMPTY(esc_list))
769 bomb = bomb_list->q_forw;
770 while (bomb != bomb_list) {
771 if (QEMPTY(esc_list)) {
775 esc = esc_list->q_forw;
776 bombp = (struct plist *)bomb;
777 while (esc != esc_list) {
778 escp = (struct plist *)esc;
779 if (escp->plane.pln_uid == bombp->plane.pln_uid) {
791 * Fit a plane of PP's type on ship SP.
792 * Adjust SP's plane counters.
793 * Updating the plane accordingly is the caller's job.
794 * Return whether it fits.
797 fit_plane_on_ship(struct plnstr *pp, struct shpstr *sp)
799 struct plchrstr *pcp = plchr + pp->pln_type;
800 struct mchrstr *mcp = mchr + sp->shp_type;
803 if (pcp->pl_flags & P_K) {
804 /* chopper, try chopper slot first */
805 if (sp->shp_nchoppers < mcp->m_nchoppers)
806 return ++sp->shp_nchoppers;
807 /* else try plane slot */
809 } else if (pcp->pl_flags & P_E) {
810 /* x-light, try x-light slot first */
811 if (sp->shp_nxlight < mcp->m_nxlight)
812 return ++sp->shp_nxlight;
813 /* else try plane slot */
814 wanted = M_MSL | M_FLY;
815 } else if (!(pcp->pl_flags & P_L)) {
816 /* not light, no go */
818 } else if (pcp->pl_flags & P_M) {
819 /* missile, use plane slot */
820 wanted = M_MSL | M_FLY;
822 /* fixed-wing plane, use plane slot */
826 if ((mcp->m_flags & wanted) == 0)
827 return 0; /* ship not capable */
829 if (sp->shp_nplane < mcp->m_nplanes)
830 return ++sp->shp_nplane;
836 * Fit a plane of PP's type off ship SP.
837 * Adjust SP's plane counters, badly. You need to run count_planes()
838 * before the next fit_plane_on_ship().
839 * Updating the plane accordingly is the caller's job.
842 fit_plane_off_ship(struct plnstr *pp, struct shpstr *sp)
845 * Frees chopper and nxlight slots first, which is why we need to
846 * run count_planes() before fit_plane_on_ship().
848 struct plchrstr *pcp = plchr + pp->pln_type;
850 if (pcp->pl_flags & P_K) {
851 if (sp->shp_nchoppers) {
855 } else if (pcp->pl_flags & P_E) {
856 if (sp->shp_nxlight) {
862 if (CANT_HAPPEN(sp->shp_nplane == 0))
868 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
870 if (plane->pln_ship == ship->shp_uid)
871 return 1; /* Already on ship */
873 if (!fit_plane_on_ship(plane, ship))
876 plane->pln_x = ship->shp_x;
877 plane->pln_y = ship->shp_y;
878 plane->pln_ship = ship->shp_uid;
879 putplane(plane->pln_uid, plane);
880 putship(ship->shp_uid, ship);
885 take_plane_off_ship(struct plnstr *plane, struct shpstr *ship)
887 if (CANT_HAPPEN(plane->pln_ship != ship->shp_uid))
890 fit_plane_off_ship(plane, ship);
891 plane->pln_ship = -1;
892 putship(ship->shp_uid, ship);
893 putplane(plane->pln_uid, plane);
897 * Fit a plane of PP's type on land unit LP.
898 * Adjust LP's plane counters.
899 * Updating the plane accordingly is the caller's job.
900 * Return whether it fits.
903 fit_plane_on_land(struct plnstr *pp, struct lndstr *lp)
905 struct plchrstr *pcp = plchr + pp->pln_type;
906 struct lchrstr *lcp = lchr + lp->lnd_type;
908 if ((pcp->pl_flags & P_E) && lp->lnd_nxlight < lcp->l_nxlight)
909 return ++lp->lnd_nxlight;
915 * Fit a plane of PP's type off land unit LP.
916 * Adjust LP's plane counters.
917 * Updating the plane accordingly is the caller's job.
920 fit_plane_off_land(struct plnstr *pp, struct lndstr *lp)
922 struct plchrstr *pcp = plchr + pp->pln_type;
924 if (CANT_HAPPEN(lp->lnd_nxlight == 0))
930 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
932 if (plane->pln_land == land->lnd_uid)
933 return 1; /* Already on unit */
935 if (!fit_plane_on_land(plane, land))
938 plane->pln_x = land->lnd_x;
939 plane->pln_y = land->lnd_y;
940 plane->pln_land = land->lnd_uid;
941 putplane(plane->pln_uid, plane);
942 putland(land->lnd_uid, land);
947 take_plane_off_land(struct plnstr *plane, struct lndstr *land)
949 if (CANT_HAPPEN(plane->pln_ship != land->lnd_uid))
952 fit_plane_off_land(plane, land);
953 plane->pln_land = -1;
954 putland(land->lnd_uid, land);
955 putplane(plane->pln_uid, plane);
959 * Could a plane of PP's type be on on ship SP?
962 could_be_on_ship(struct plnstr *pp, struct shpstr *sp)
967 ship.shp_nplane = ship.shp_nchoppers = ship.shp_nxlight = 0;
968 return fit_plane_on_ship(pp, &ship);
972 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
975 struct plchrstr *pcp;
976 struct emp_qelem *qp;
977 struct emp_qelem *next;
983 getsect(x, y, §);
984 mines_there = sect.sct_mines;
986 if (mines_there == 0)
989 if ((sect.sct_type != SCT_WATER) && (sect.sct_type != SCT_HARBR))
992 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
995 ip = (struct plist *)qp;
998 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
1001 if (chance((100.0 - pp->pln_acc) / 100.0)) {
1002 pr("Sweep! in %s\n",
1003 xyas(sect.sct_x, sect.sct_y, pp->pln_own));
1009 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
1010 writemap(player->cnum);
1011 sect.sct_mines = mines_there;
1016 count_planes(struct shpstr *sp)
1018 struct nstr_item ni;
1019 struct plnstr plane;
1020 int nplane, nchoppers, nxlight;
1022 if (sp->shp_effic < SHIP_MINEFF)
1025 nplane = sp->shp_nplane;
1027 nchoppers = sp->shp_nchoppers;
1028 sp->shp_nchoppers = 0;
1029 nxlight = sp->shp_nxlight;
1030 sp->shp_nxlight = 0;
1032 snxtitem_xy(&ni, EF_PLANE, sp->shp_x, sp->shp_y);
1033 while (nxtitem(&ni, &plane)) {
1034 if (plane.pln_own == 0)
1036 if (plane.pln_ship == sp->shp_uid) {
1037 if (!fit_plane_on_ship(&plane, sp))
1042 if (nplane != sp->shp_nplane ||
1043 nxlight != sp->shp_nxlight || nchoppers != sp->shp_nchoppers) {
1044 putship(sp->shp_uid, sp);
1049 count_land_planes(struct lndstr *lp)
1051 struct nstr_item ni;
1052 struct plnstr plane;
1055 if (lp->lnd_effic < LAND_MINEFF)
1058 nplane = lp->lnd_nxlight;
1059 lp->lnd_nxlight = 0;
1061 snxtitem_all(&ni, EF_PLANE);
1062 while (nxtitem(&ni, &plane)) {
1063 if (plane.pln_own == 0)
1065 if (plane.pln_land == lp->lnd_uid)
1066 if (!fit_plane_on_land(&plane, lp))
1070 if (lp->lnd_nxlight != nplane)
1071 putland(lp->lnd_uid, lp);
1075 count_sect_planes(struct sctstr *sp)
1078 struct nstr_item ni;
1079 struct plnstr plane;
1081 snxtitem_all(&ni, EF_PLANE);
1082 while (nxtitem(&ni, &plane)) {
1085 if (plane.pln_flags & PLN_LAUNCHED)
1087 if (plane.pln_x == sp->sct_x && plane.pln_y == sp->sct_y)
1095 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
1097 struct plchrstr *pcp = plchr + pp->pln_type;
1098 double tfact = (double)(pp->pln_tech - pcp->pl_tech) /
1099 (pp->pln_tech - pcp->pl_tech / 2);
1100 int acc = pp->pln_acc;
1103 if (type == EF_SHIP) {
1104 if (pcp->pl_flags & P_A)
1106 if (!(pcp->pl_flags & P_T))
1109 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
1110 (1.0 - acc / 100.0)) - hardtarget;
1112 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
1114 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
1115 if (hitchance > 100)
1120 /* return 0 if there was a nuclear detonation */
1123 pln_damage(struct plnstr *pp, coord x, coord y, char type, int *nukedamp,
1127 struct plchrstr *pcp = plchr + pp->pln_type;
1135 if (pp->pln_nuketype != -1) {
1136 if (nuk_on_plane(&nuke, pp->pln_uid) >= 0) {
1137 mpr(pp->pln_own, "Releasing RV's for %s detonation...\n",
1138 pp->pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
1139 pp->pln_nuketype = -1;
1140 *nukedamp = detonate(&nuke, x, y,
1141 pp->pln_flags & PLN_AIRBURST);
1148 if (!pp->pln_load) /* e.g. ab, blowing up on launch pad */
1151 i = roll(pp->pln_load) + 1;
1152 if (i > pp->pln_load)
1155 if (pcp->pl_flags & P_M) {
1156 if (pcp->pl_flags & P_MAR)
1158 } else if (pcp->pl_flags & P_T)
1161 aim = 100 - pp->pln_acc;
1175 hitroll = roll(100);
1176 if (hitroll >= 90) {
1179 mpr(pp->pln_own, "BLAM");
1180 } else if (hitroll < aim) {
1183 mpr(pp->pln_own, "Blam");
1187 mpr(pp->pln_own, "blam");
1190 mpr(pp->pln_own, "-");
1193 mpr(pp->pln_own, "\n");
1200 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1203 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1204 return (int)(100 - 100 * misschance * misschance);
1208 pln_mobcost(int dist, struct plnstr *pp, int flags)
1212 cost = 20.0 / (pp->pln_effic / 100.0);
1213 if ((flags & P_F) || (flags & P_ESC))
1216 return ldround(cost * dist / pp->pln_range_max + 5, 1);
1220 * Set PP's tech to TLEV along with everything else that depends on it.
1223 pln_set_tech(struct plnstr *pp, int tlev)
1225 struct plchrstr *pcp = plchr + pp->pln_type;
1226 int tech_diff = tlev - pcp->pl_tech;
1227 int limited_range = pp->pln_range < pp->pln_range_max;
1229 if (CANT_HAPPEN(tech_diff < 0)) {
1234 pp->pln_tech = tlev;
1235 pp->pln_att = PLN_ATTDEF(pcp->pl_att, tech_diff);
1236 pp->pln_def = PLN_ATTDEF(pcp->pl_def, tech_diff);
1237 pp->pln_acc = PLN_ACC(pcp->pl_acc, tech_diff);
1238 pp->pln_range_max = PLN_RAN(pcp->pl_range, tech_diff);
1239 pp->pln_load = PLN_LOAD(pcp->pl_load, tech_diff);
1241 if (!limited_range || pp->pln_range > pp->pln_range_max)
1242 pp->pln_range = pp->pln_range_max;