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, 2004-2005
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, player->cnum);
118 if (!(p = getstarg(0, "Carrier #? ", buf)) || !*p)
122 || !getship(cno, &ship)
124 && (getrel(getnatp(ship.shp_own), player->cnum)
129 if (ship.shp_x != target->sct_x || ship.shp_y != target->sct_y) {
130 pr("Ship #%d not in %s\n", cno,
131 xyas(target->sct_x, target->sct_y, player->cnum));
134 fl = carrier_planes(&ship, 0);
136 pr("Can't land on %s.\n", prship(&ship));
139 /* clear to land on ship#CNO */
140 pr("landing on carrier %d\n", cno);
148 /* try to land at sector */
149 if (target->sct_own != player->cnum
150 && getrel(getnatp(target->sct_own), player->cnum) != ALLIED) {
151 pr("Nowhere to land at sector %s!\n",
152 xyas(target->sct_x, target->sct_y, player->cnum));
155 if (target->sct_type == SCT_MOUNT) {
156 pr("Nowhere to land at sector %s!\n",
157 xyas(target->sct_x, target->sct_y, player->cnum));
160 if (target->sct_type != SCT_AIRPT || target->sct_effic < 60)
163 /* clear to land at sector */
170 pln_oneway_to_carrier_ok(struct emp_qelem *bomb_list,
171 struct emp_qelem *esc_list, int cno)
173 struct emp_qelem *list, *qp;
177 if (cno < 0 || !getship(cno, &ship))
183 for (list = bomb_list;
185 list = list == bomb_list ? esc_list : NULL) {
186 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
187 plp = (struct plist *)qp;
188 if (plp->plane.pln_ship == ship.shp_uid)
190 if (!fit_plane_on_ship(&plp->plane, &ship))
198 pln_newlanding(struct emp_qelem *list, coord tx, coord ty, int cno)
200 struct emp_qelem *qp;
207 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
208 plp = (struct plist *)qp;
211 if (!could_be_on_ship(&plp->plane, &ship))
212 pr("\t%s cannot land on ship #%d! %s aborts!\n",
213 prplane(&plp->plane), cno, prplane(&plp->plane));
214 else if (!put_plane_on_ship(&plp->plane, &ship))
215 pr("\tNo room on ship #%d! %s aborts!\n",
216 cno, prplane(&plp->plane));
218 if (plp->plane.pln_own != ship.shp_own) {
219 /* plp->plane.pln_own = ship.shp_own;*/
220 wu(0, ship.shp_own, "%s %s lands on your %s\n",
221 cname(player->cnum), prplane(&plp->plane),
226 plp->plane.pln_x = tx;
227 plp->plane.pln_y = ty;
228 getsect(tx, ty, §);
229 if (plp->plane.pln_own != sect.sct_own) {
230 /* plp->plane.pln_own = sect.sct_own;*/
232 "%s %s lands at your sector %s\n",
234 prplane(&plp->plane), xyas(tx, ty, sect.sct_own));
236 plp->plane.pln_ship = cno;
240 putship(ship.shp_uid, &ship);
244 pln_dropoff(struct emp_qelem *list, struct ichrstr *ip, coord tx, coord ty,
247 struct emp_qelem *qp;
250 struct sctstr *sectp;
259 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
260 plp = (struct plist *)qp;
263 if (type == EF_SECTOR) {
265 if (!sectp->sct_own) {
266 if (sectp->sct_type == SCT_WATER)
267 pr("Your %s sink like a rock!\n", ip->i_name);
269 pr("Your %s vanish without a trace.\n", ip->i_name);
272 if (sectp->sct_own != player->cnum
273 && getrel(getnatp(sectp->sct_own), player->cnum) != ALLIED) {
274 pr("You don't own %s! Cargo jettisoned...\n",
275 xyas(tx, ty, player->cnum));
278 if (ip->i_uid == I_CIVIL && sectp->sct_own != sectp->sct_oldown) {
279 pr("%s is occupied. Your civilians suffer from identity crisis and die.\n",
280 xyas(tx, ty, player->cnum));
283 there = sectp->sct_item[ip->i_uid];
287 there = sp->shp_item[ip->i_uid];
288 mp = &mchr[(int)sp->shp_type];
289 max = mp->m_item[ip->i_uid];
293 pr("%d excess %s discarded\n", max - there, ip->i_name);
297 pr("%d %s landed safely", amt, ip->i_name);
298 if (type == EF_SECTOR) {
300 sectp->sct_item[ip->i_uid] = there;
301 if (sectp->sct_own != player->cnum)
302 wu(0, sectp->sct_own, "%s planes drop %d %s in %s\n",
303 cname(player->cnum), amt, ip->i_name,
304 xyas(sectp->sct_x, sectp->sct_y, sectp->sct_own));
305 pr(" at %s\n", xyas(tx, ty, player->cnum));
306 putsect((struct sctstr *)ptr);
308 struct shpstr *sp = (struct shpstr *)ptr;
309 sp->shp_item[ip->i_uid] = there;
310 if (sp->shp_own != player->cnum)
311 wu(0, sp->shp_own, "%s planes land %d %s on carrier %d\n",
312 cname(player->cnum), amt, ip->i_name, sp->shp_uid);
313 pr(" on carrier #%d\n", sp->shp_uid);
314 putship(sp->shp_uid, sp);
319 pln_mine(struct emp_qelem *list, struct sctstr *sectp)
321 struct emp_qelem *qp;
326 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
327 plp = (struct plist *)qp;
332 if (sectp->sct_type != SCT_WATER) {
333 pr("Your seamines have no effect here.\n");
336 sectp->sct_mines = MIN(sectp->sct_mines + amt, MINES_MAX);
337 pr("%d mines laid in %s.\n", amt,
338 xyas(sectp->sct_x, sectp->sct_y, player->cnum));
339 if (map_set(player->cnum, sectp->sct_x, sectp->sct_y, 'X', 0))
340 writemap(player->cnum);
346 * Has PP's type capabilities satisfying WANTFLAGS and NOWANTFLAGS?
347 * A plane type is capable unless
348 * - it lacks all of the P_F, P_ESC in WANTFLAGS, or
349 * - it lacks all of the P_E, P_L, P_K in WANTFLAGS, or
350 * - it lacks any of the other capabilities in WANTFLAGS, or
351 * - it has any of the capabilities in NOWANTFLAGS.
354 pln_capable(struct plnstr *pp, int wantflags, int nowantflags)
356 int flags = plchr[(int)pp->pln_type].pl_flags;
358 if (wantflags & (P_F | P_ESC)) {
359 if ((flags & wantflags & (P_F | P_ESC)) == 0)
361 wantflags &= ~(P_F | P_ESC);
364 if (wantflags & (P_E | P_L | P_K)) {
365 if ((flags & wantflags & (P_E | P_L | P_K)) == 0)
367 wantflags &= ~(P_E | P_L | P_K);
370 if ((flags & wantflags) != wantflags)
373 if (flags & nowantflags)
380 * Find plane types that can operate from carrier SP.
381 * If MSL find missile types, else non-missile types.
382 * Return a combination of P_L, P_K, P_E.
383 * It's zero if SP can't support air operations due to its type or
384 * state (low efficiency).
387 carrier_planes(struct shpstr *sp, int msl)
389 struct mchrstr *mcp = mchr + sp->shp_type;
392 if (sp->shp_effic < SHP_AIROPS_EFF)
396 if (mcp->m_flags & M_FLY)
398 if ((mcp->m_flags & M_MSL) && msl)
400 if (mcp->m_nchoppers && !msl)
408 pln_airbase_ok(struct plnstr *pp, int oneway, int noisy)
413 struct plchrstr *pcp = plchr + pp->pln_type;
415 if (CANT_HAPPEN(noisy && pp->pln_own != player->cnum))
418 if (pp->pln_ship >= 0) {
419 /* ship: needs to be own or allied, efficient */
420 if (!getship(pp->pln_ship, &ship)) {
424 if (ship.shp_own != pp->pln_own
425 && getrel(getnatp(ship.shp_own), pp->pln_own) != ALLIED) {
427 pr("(note) An ally does not own the ship %s is on\n",
431 if (!(carrier_planes(&ship, pcp->pl_flags & P_M) & pcp->pl_flags))
434 } else if (pp->pln_land >= 0) {
435 /* land: needs to be own or allied, efficient, not embarked */
436 if (!getland(pp->pln_land, &land)) {
440 if (land.lnd_own != pp->pln_own
441 && getrel(getnatp(land.lnd_own), pp->pln_own) != ALLIED) {
443 pr("(note) An ally does not own the unit %s is on\n",
447 if (land.lnd_effic < LND_AIROPS_EFF || !(pcp->pl_flags & P_E))
449 if (land.lnd_ship >= 0 || land.lnd_land >= 0)
453 /* sector: needs to be own or allied, efficient airfield */
454 if (!getsect(pp->pln_x, pp->pln_y, §)) {
459 if (sect.sct_own != pp->pln_own
460 && getrel(getnatp(sect.sct_own), pp->pln_own) != ALLIED) {
462 pr("(note) An ally does not own the sector %s is in\n",
466 /* need airfield unless VTOL */
467 if ((pcp->pl_flags & P_V) == 0) {
468 if (sect.sct_type != SCT_AIRPT) {
470 pr("%s not at airport\n", prplane(pp));
473 if (sect.sct_effic < 40) {
475 pr("%s is not 40%% efficient, %s can't take off from there.\n",
476 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
480 if (!oneway && sect.sct_effic < 60) {
482 pr("%s is not 60%% efficient, %s can't land there.\n",
483 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
494 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
495 int ap_to_target, int rangemult, int wantflags, int nowantflags)
499 struct plchrstr *pcp;
503 while (nxtitem(ni, &plane)) {
506 if (plane.pln_mobil <= 0)
509 if (ontradingblock(EF_PLANE, &plane)) {
510 pr("plane #%d inelligible - it's for sale.\n",
516 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
518 pr("%s too far from assembly point\n", prplane(&plane));
521 if (plane.pln_effic < 40) {
522 pr("%s not efficient enough (must be 40%%)\n",
526 range += ap_to_target;
528 pcp = &plchr[(int)plane.pln_type];
529 if (!pln_capable(&plane, wantflags, nowantflags))
531 if (plane.pln_range < range) {
532 pr("%s out of range (%d:%d)\n",
533 prplane(&plane), plane.pln_range, range);
536 if (!pln_airbase_ok(&plane, rangemult != 2, 1))
538 pr("%s standing by\n", prplane(&plane));
539 plane.pln_mission = 0;
540 putplane(plane.pln_uid, &plane);
541 plp = malloc(sizeof(struct plist));
546 emp_insque(&plp->queue, list);
551 pln_arm(struct emp_qelem *list, int dist, char mission, struct ichrstr *ip,
552 int flags, int mission_flags)
554 struct emp_qelem *qp;
555 struct emp_qelem *next;
558 for (qp = list->q_forw; qp != list; qp = next) {
560 plp = (struct plist *)qp;
561 if (pln_equip(plp, ip, flags, mission) < 0) {
566 if (flags & (P_S | P_I)) {
567 if (plp->pcp->pl_flags & P_S)
568 mission_flags |= P_S;
569 if (plp->pcp->pl_flags & P_I)
570 mission_flags |= P_I;
572 if (!(plp->pcp->pl_flags & P_H))
573 /* no stealth on this mission */
574 mission_flags &= ~P_H;
575 if (!(plp->pcp->pl_flags & P_X))
576 /* no stealth on this mission */
577 mission_flags &= ~P_X;
578 if (!(plp->pcp->pl_flags & P_A)) {
579 /* no asw on this mission */
580 mission_flags &= ~P_A;
581 /* FIXME escorts turn ASW patrol into ordinary recon */
583 if (!(plp->pcp->pl_flags & P_MINE)) {
584 /* no asw on this mission */
585 mission_flags &= ~P_MINE;
586 /* FIXME no effect */
588 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
589 pr("%s equipped\n", prplane(&plp->plane));
591 return mission_flags;
595 pln_equip(struct plist *plp, struct ichrstr *ip, int flags, char mission)
597 struct plchrstr *pcp;
611 if (pp->pln_ship >= 0) {
612 getship(pp->pln_ship, &ship);
613 item = ship.shp_item;
615 } else if (pp->pln_land >= 0) {
616 getland(pp->pln_land, &land);
617 item = land.lnd_item;
620 getsect(pp->pln_x, pp->pln_y, §);
621 item = sect.sct_item;
622 own = sect.sct_oldown;
625 if (ip->i_uid == I_CIVIL) {
626 if (pp->pln_own != own) {
627 pr("You don't control those civilians!\n");
632 if (pcp->pl_fuel > item[I_PETROL]) {
633 pr("%s not enough petrol there!\n", prplane(pp));
636 item[I_PETROL] -= pcp->pl_fuel;
638 if ((flags & P_F) == 0) {
644 if (pp->pln_nuketype == -1) {
646 needed = pp->pln_load;
651 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
654 needed = (pp->pln_load * 2) / ip->i_lbs;
657 if ((pcp->pl_flags & P_MINE) == 0)
660 needed = (pp->pln_load * 2) / ip->i_lbs;
663 if ((pcp->pl_flags & (P_V | P_C)) == 0)
666 needed = pp->pln_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;
729 struct emp_qelem *newqp;
735 /* Here is where planes return home from bombing runs.
736 We need to make sure they still have somewhere to return
740 plp = (struct plist *)qp;
742 /* Ok, check out where it wants to land */
743 if (pp->pln_ship >= 0) {
744 /* It is landing on a carrier */
745 getship(pp->pln_ship, &ship);
746 /* We should do more, like make sure it's really
747 a carrier, etc. but for now just make sure it's
749 if (ship.shp_effic < SHIP_MINEFF) {
751 "Ship #%d has been sunk, plane #%d has nowhere to land, and\n"
752 "splashes into the sea.\n",
753 pp->pln_ship, pp->pln_uid);
757 /* Presume we are landing back in a sector. */
758 getsect(pp->pln_x, pp->pln_y, §);
759 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
761 "Nowhere to land at %s, plane #%d crashes and burns...\n",
762 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
766 putplane(pp->pln_uid, pp);
775 pln_removedupes(struct emp_qelem *bomb_list, struct emp_qelem *esc_list)
777 struct emp_qelem *bomb;
778 struct emp_qelem *esc;
782 if (QEMPTY(bomb_list) || QEMPTY(esc_list))
784 bomb = bomb_list->q_forw;
785 while (bomb != bomb_list) {
786 if (QEMPTY(esc_list)) {
790 esc = esc_list->q_forw;
791 bombp = (struct plist *)bomb;
792 while (esc != esc_list) {
793 escp = (struct plist *)esc;
794 if (escp->plane.pln_uid == bombp->plane.pln_uid) {
806 * Fit a plane of PP's type on ship SP.
807 * Adjust SP's plane counters.
808 * Updating the plane accordingly is the caller's job.
809 * Return whether it fits.
812 fit_plane_on_ship(struct plnstr *pp, struct shpstr *sp)
814 struct plchrstr *pcp = plchr + pp->pln_type;
815 struct mchrstr *mcp = mchr + sp->shp_type;
818 if (pcp->pl_flags & P_K) {
819 /* chopper, try chopper slot first */
820 if (sp->shp_nchoppers < mcp->m_nchoppers)
821 return ++sp->shp_nchoppers;
822 /* else try plane slot */
824 } else if (pcp->pl_flags & P_E) {
825 /* x-light, try x-light slot first */
826 if (sp->shp_nxlight < mcp->m_nxlight)
827 return ++sp->shp_nxlight;
828 /* else try plane slot */
829 wanted = M_MSL | M_FLY;
830 } else if (!(pcp->pl_flags & P_L)) {
831 /* not light, no go */
833 } else if (pcp->pl_flags & P_M) {
834 /* missile, use plane slot */
835 wanted = M_MSL | M_FLY;
837 /* fixed-wing plane, use plane slot */
841 if ((mcp->m_flags & wanted) == 0)
842 return 0; /* ship not capable */
844 if (sp->shp_nplane < mcp->m_nplanes)
845 return ++sp->shp_nplane;
851 * Fit a plane of PP's type off ship SP.
852 * Adjust SP's plane counters, badly. You need to run count_planes()
853 * before the next fit_plane_on_ship().
854 * Updating the plane accordingly is the caller's job.
857 fit_plane_off_ship(struct plnstr *pp, struct shpstr *sp)
860 * Frees chopper and nxlight slots first, which is why we need to
861 * run count_planes() before fit_plane_on_ship().
863 struct plchrstr *pcp = plchr + pp->pln_type;
865 if (pcp->pl_flags & P_K) {
866 if (sp->shp_nchoppers) {
870 } else if (pcp->pl_flags & P_E) {
871 if (sp->shp_nxlight) {
877 if (CANT_HAPPEN(sp->shp_nplane == 0))
883 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
885 if (plane->pln_ship == ship->shp_uid)
886 return 1; /* Already on ship */
888 if (!fit_plane_on_ship(plane, ship))
891 plane->pln_x = ship->shp_x;
892 plane->pln_y = ship->shp_y;
893 plane->pln_ship = ship->shp_uid;
894 putplane(plane->pln_uid, plane);
895 putship(ship->shp_uid, ship);
900 take_plane_off_ship(struct plnstr *plane, struct shpstr *ship)
902 if (CANT_HAPPEN(plane->pln_ship != ship->shp_uid))
905 fit_plane_off_ship(plane, ship);
906 plane->pln_ship = -1;
907 putship(ship->shp_uid, ship);
908 putplane(plane->pln_uid, plane);
912 * Fit a plane of PP's type on land unit LP.
913 * Adjust LP's plane counters.
914 * Updating the plane accordingly is the caller's job.
915 * Return whether it fits.
918 fit_plane_on_land(struct plnstr *pp, struct lndstr *lp)
920 struct plchrstr *pcp = plchr + pp->pln_type;
921 struct lchrstr *lcp = lchr + lp->lnd_type;
923 if ((pcp->pl_flags & P_E) && lp->lnd_nxlight < lcp->l_nxlight)
924 return ++lp->lnd_nxlight;
930 * Fit a plane of PP's type off land unit LP.
931 * Adjust LP's plane counters.
932 * Updating the plane accordingly is the caller's job.
935 fit_plane_off_land(struct plnstr *pp, struct lndstr *lp)
937 struct plchrstr *pcp = plchr + pp->pln_type;
939 if (CANT_HAPPEN(lp->lnd_nxlight == 0))
945 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
947 if (plane->pln_land == land->lnd_uid)
948 return 1; /* Already on unit */
950 if (!fit_plane_on_land(plane, land))
953 plane->pln_x = land->lnd_x;
954 plane->pln_y = land->lnd_y;
955 plane->pln_land = land->lnd_uid;
956 putplane(plane->pln_uid, plane);
957 putland(land->lnd_uid, land);
962 take_plane_off_land(struct plnstr *plane, struct lndstr *land)
964 if (CANT_HAPPEN(plane->pln_land != land->lnd_uid))
967 fit_plane_off_land(plane, land);
968 plane->pln_land = -1;
969 putland(land->lnd_uid, land);
970 putplane(plane->pln_uid, plane);
974 * Could a plane of PP's type be on on ship SP?
977 could_be_on_ship(struct plnstr *pp, struct shpstr *sp)
982 ship.shp_nplane = ship.shp_nchoppers = ship.shp_nxlight = 0;
983 return fit_plane_on_ship(pp, &ship);
987 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
990 struct plchrstr *pcp;
991 struct emp_qelem *qp;
992 struct emp_qelem *next;
998 getsect(x, y, §);
999 mines_there = sect.sct_mines;
1001 if (mines_there == 0)
1004 if ((sect.sct_type != SCT_WATER) && (sect.sct_type != SCT_HARBR))
1007 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
1010 ip = (struct plist *)qp;
1013 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
1016 if (chance((100.0 - pp->pln_acc) / 100.0)) {
1017 pr("Sweep! in %s\n",
1018 xyas(sect.sct_x, sect.sct_y, pp->pln_own));
1024 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
1025 writemap(player->cnum);
1026 sect.sct_mines = mines_there;
1031 count_planes(struct shpstr *sp)
1033 struct nstr_item ni;
1034 struct plnstr plane;
1035 int nplane, nchoppers, nxlight;
1037 if (sp->shp_effic < SHIP_MINEFF)
1040 nplane = sp->shp_nplane;
1042 nchoppers = sp->shp_nchoppers;
1043 sp->shp_nchoppers = 0;
1044 nxlight = sp->shp_nxlight;
1045 sp->shp_nxlight = 0;
1047 snxtitem_xy(&ni, EF_PLANE, sp->shp_x, sp->shp_y);
1048 while (nxtitem(&ni, &plane)) {
1049 if (plane.pln_own == 0)
1051 if (plane.pln_ship == sp->shp_uid) {
1052 if (!fit_plane_on_ship(&plane, sp))
1057 if (nplane != sp->shp_nplane ||
1058 nxlight != sp->shp_nxlight || nchoppers != sp->shp_nchoppers) {
1059 putship(sp->shp_uid, sp);
1064 count_land_planes(struct lndstr *lp)
1066 struct nstr_item ni;
1067 struct plnstr plane;
1070 if (lp->lnd_effic < LAND_MINEFF)
1073 nplane = lp->lnd_nxlight;
1074 lp->lnd_nxlight = 0;
1076 snxtitem_all(&ni, EF_PLANE);
1077 while (nxtitem(&ni, &plane)) {
1078 if (plane.pln_own == 0)
1080 if (plane.pln_land == lp->lnd_uid)
1081 if (!fit_plane_on_land(&plane, lp))
1085 if (lp->lnd_nxlight != nplane)
1086 putland(lp->lnd_uid, lp);
1090 count_sect_planes(struct sctstr *sp)
1093 struct nstr_item ni;
1094 struct plnstr plane;
1096 snxtitem_all(&ni, EF_PLANE);
1097 while (nxtitem(&ni, &plane)) {
1100 if (plane.pln_flags & PLN_LAUNCHED)
1102 if (plane.pln_x == sp->sct_x && plane.pln_y == sp->sct_y)
1110 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
1112 struct plchrstr *pcp = plchr + pp->pln_type;
1113 double tfact = (double)(pp->pln_tech - pcp->pl_tech) /
1114 (pp->pln_tech - pcp->pl_tech / 2);
1115 int acc = pp->pln_acc;
1118 if (type == EF_SHIP) {
1119 if (pcp->pl_flags & P_A)
1121 if (!(pcp->pl_flags & P_T))
1124 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
1125 (1.0 - acc / 100.0)) - hardtarget;
1127 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
1129 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
1130 if (hitchance > 100)
1135 /* return 0 if there was a nuclear detonation */
1138 pln_damage(struct plnstr *pp, coord x, coord y, char type, int *nukedamp,
1142 struct plchrstr *pcp = plchr + pp->pln_type;
1150 if (pp->pln_nuketype != -1) {
1151 if (nuk_on_plane(&nuke, pp->pln_uid) >= 0) {
1152 mpr(pp->pln_own, "Releasing RV's for %s detonation...\n",
1153 pp->pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
1154 pp->pln_nuketype = -1;
1155 *nukedamp = detonate(&nuke, x, y,
1156 pp->pln_flags & PLN_AIRBURST);
1163 if (!pp->pln_load) /* e.g. ab, blowing up on launch pad */
1166 i = roll(pp->pln_load) + 1;
1167 if (i > pp->pln_load)
1170 if (pcp->pl_flags & P_M) {
1171 if (pcp->pl_flags & P_MAR)
1173 } else if (pcp->pl_flags & P_T)
1176 aim = 100 - pp->pln_acc;
1190 hitroll = roll(100);
1191 if (hitroll >= 90) {
1194 mpr(pp->pln_own, "BLAM");
1195 } else if (hitroll < aim) {
1198 mpr(pp->pln_own, "Blam");
1202 mpr(pp->pln_own, "blam");
1205 mpr(pp->pln_own, "-");
1208 mpr(pp->pln_own, "\n");
1215 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1218 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1219 return (int)(100 - 100 * misschance * misschance);
1223 pln_mobcost(int dist, struct plnstr *pp, int flags)
1227 cost = 20.0 / (pp->pln_effic / 100.0);
1228 if ((flags & P_F) || (flags & P_ESC))
1231 return ldround(cost * dist / pp->pln_range_max + 5, 1);
1235 * Set PP's tech to TLEV along with everything else that depends on it.
1238 pln_set_tech(struct plnstr *pp, int tlev)
1240 struct plchrstr *pcp = plchr + pp->pln_type;
1241 int tech_diff = tlev - pcp->pl_tech;
1242 int limited_range = pp->pln_range < pp->pln_range_max;
1244 if (CANT_HAPPEN(tech_diff < 0)) {
1249 pp->pln_tech = tlev;
1250 pp->pln_att = PLN_ATTDEF(pcp->pl_att, tech_diff);
1251 pp->pln_def = PLN_ATTDEF(pcp->pl_def, tech_diff);
1252 pp->pln_acc = PLN_ACC(pcp->pl_acc, tech_diff);
1253 pp->pln_range_max = PLN_RAN(pcp->pl_range, tech_diff);
1254 pp->pln_load = PLN_LOAD(pcp->pl_load, tech_diff);
1256 if (!limited_range || pp->pln_range > pp->pln_range_max)
1257 pp->pln_range = pp->pln_range_max;