2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2012, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 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, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * plnsub.c: Plane subroutine stuff
29 * Known contributors to this file:
32 * Steve McClure, 1998-2000
33 * Markus Armbruster, 2004-2012
49 #include "prototypes.h"
54 static int ship_can_carry(struct shpstr *, int, int, int, int);
55 static int inc_shp_nplane(struct plnstr *, int *, int *, int *);
58 * Get planes and escorts argument.
59 * Read planes into *NI_BOMB, and (optional) escorts into *NI_ESC.
60 * If INPUT_BOMB is not empty, use it, else prompt for more input.
62 * If we got a plane argument, initialize *NI_BOMB and *NI_ESC, and
64 * Else return -1 (*NI_BOMB and *NI_ESC may be modified).
67 get_planes(struct nstr_item *ni_bomb, struct nstr_item *ni_esc,
68 char *input_bomb, char *input_esc)
70 if (!snxtitem(ni_bomb, EF_PLANE, input_bomb, NULL))
72 if (!snxtitem(ni_esc, EF_PLANE, input_esc, "escort(s)? ")) {
75 pr("No escorts...\n");
81 * Get assembly point argument.
82 * If INPUT is not empty, use it, else prompt for more input using PROMPT.
83 * If this yields a valid assembly point, read it into *AP_SECT and
85 * Else complain and return NULL.
86 * *AP_SECT and BUF[1024] may be modified in either case.
89 get_assembly_point(char *input, struct sctstr *ap_sect, char *buf)
96 p = getstarg(input, "assembly point? ", buf);
99 if (!sarg_xy(p, &x, &y) || !getsect(x, y, ap_sect))
102 /* over own or allied sector is fine */
103 if (relations_with(ap_sect->sct_own, player->cnum) == ALLIED)
106 /* over own or allied ship is fine */
107 snxtitem_xy(&ni, EF_SHIP, x, y);
108 while (nxtitem(&ni, &ship)) {
109 if (ship.shp_effic < SHIP_MINEFF || ship.shp_own == 0)
111 if (relations_with(ship.shp_own, player->cnum) == ALLIED)
115 pr("Assembly point not owned by you or an ally!\n");
120 pln_onewaymission(struct sctstr *target, int *shipno, int *flagp)
132 nships = carriersatxy(target->sct_x, target->sct_y, player->cnum);
135 p = getstring("Carrier #? ", buf);
142 || !getship(cno, &ship)
144 && (relations_with(ship.shp_own, player->cnum)
149 if (ship.shp_x != target->sct_x || ship.shp_y != target->sct_y) {
150 pr("Ship #%d not in %s\n", cno,
151 xyas(target->sct_x, target->sct_y, player->cnum));
154 fl = carrier_planes(&ship, 0);
156 pr("Can't land on %s.\n", prship(&ship));
159 /* clear to land on ship#CNO */
160 pr("landing on carrier %d\n", cno);
168 /* try to land at sector */
169 if (relations_with(target->sct_own, player->cnum) != ALLIED) {
170 pr("Nowhere to land at sector %s!\n",
171 xyas(target->sct_x, target->sct_y, player->cnum));
174 if (target->sct_type == SCT_MOUNT) {
175 pr("Nowhere to land at sector %s!\n",
176 xyas(target->sct_x, target->sct_y, player->cnum));
179 if (target->sct_type != SCT_AIRPT || target->sct_effic < 60)
182 /* clear to land at sector */
189 pln_oneway_to_carrier_ok(struct emp_qelem *bomb_list,
190 struct emp_qelem *esc_list, int cno)
192 int n, nch, nxl, nmsl;
193 struct emp_qelem *list, *qp;
197 if (cno < 0 || !getship(cno, &ship))
199 n = shp_nplane(&ship, &nch, &nxl, &nmsl);
202 for (list = bomb_list;
204 list = list == bomb_list ? esc_list : NULL) {
205 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
206 plp = (struct plist *)qp;
207 if (plp->plane.pln_ship == ship.shp_uid)
210 if (!inc_shp_nplane(&plp->plane, &nch, &nxl, &nmsl))
214 return ship_can_carry(&ship, n, nch, nxl, nmsl);
218 pln_newlanding(struct emp_qelem *list, coord tx, coord ty, int cno)
220 struct emp_qelem *qp;
227 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
228 plp = (struct plist *)qp;
230 if (!could_be_on_ship(&plp->plane, &ship, 0, 0, 0, 0))
231 pr("\t%s cannot land on ship #%d! %s aborts!\n",
232 prplane(&plp->plane), cno, prplane(&plp->plane));
233 else if (!put_plane_on_ship(&plp->plane, &ship))
234 pr("\tNo room on ship #%d! %s aborts!\n",
235 cno, prplane(&plp->plane));
237 if (plp->plane.pln_own != ship.shp_own) {
238 wu(0, ship.shp_own, "%s %s lands on your %s\n",
239 cname(player->cnum), prplane(&plp->plane),
244 plp->plane.pln_x = tx;
245 plp->plane.pln_y = ty;
246 getsect(tx, ty, §);
247 if (plp->plane.pln_own != sect.sct_own) {
249 "%s %s lands at your sector %s\n",
251 prplane(&plp->plane), xyas(tx, ty, sect.sct_own));
253 plp->plane.pln_ship = cno;
259 pln_dropoff(struct emp_qelem *list, struct ichrstr *ip, coord tx, coord ty,
262 struct emp_qelem *qp;
273 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
274 plp = (struct plist *)qp;
278 getsect(tx, ty, §);
280 if (sect.sct_type == SCT_WATER)
281 pr("Your %s sink like a rock!\n", ip->i_name);
283 pr("Your %s vanish without a trace.\n", ip->i_name);
286 if (relations_with(sect.sct_own, player->cnum) != ALLIED) {
287 pr("You don't own %s! Cargo jettisoned...\n",
288 xyas(tx, ty, player->cnum));
291 if (ip->i_uid == I_CIVIL && sect.sct_own != sect.sct_oldown) {
292 pr("%s is occupied. Your civilians suffer from identity crisis and die.\n",
293 xyas(tx, ty, player->cnum));
296 there = sect.sct_item[ip->i_uid];
300 there = ship.shp_item[ip->i_uid];
301 max = mchr[ship.shp_type].m_item[ip->i_uid];
305 pr("%d excess %s discarded\n", there - max, ip->i_name);
309 pr("%d %s landed safely", amt, ip->i_name);
311 sect.sct_item[ip->i_uid] = there;
312 if (sect.sct_own != player->cnum)
313 wu(0, sect.sct_own, "%s planes drop %d %s in %s\n",
314 cname(player->cnum), amt, ip->i_name,
315 xyas(tx, ty, sect.sct_own));
316 pr(" at %s\n", xyas(tx, ty, player->cnum));
319 ship.shp_item[ip->i_uid] = there;
320 if (ship.shp_own != player->cnum)
321 wu(0, ship.shp_own, "%s planes land %d %s on carrier %d\n",
322 cname(player->cnum), amt, ip->i_name, ship.shp_uid);
323 pr(" on carrier #%d\n", ship.shp_uid);
324 putship(ship.shp_uid, &ship);
329 pln_mine(struct emp_qelem *list, coord tx, coord ty)
331 struct emp_qelem *qp;
337 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
338 plp = (struct plist *)qp;
343 getsect(tx, ty, §);
344 if (sect.sct_type != SCT_WATER) {
345 pr("Your seamines have no effect here.\n");
348 sect.sct_mines = MIN(sect.sct_mines + amt, MINES_MAX);
349 pr("%d mines laid in %s.\n", amt, xyas(tx, ty, player->cnum));
350 if (map_set(player->cnum, tx, ty, 'X', 0))
351 writemap(player->cnum);
357 * Has PP's type capabilities satisfying WANTFLAGS and NOWANTFLAGS?
358 * A plane type is capable unless
359 * - it lacks all of the P_B, P_T in WANTFLAGS, or
360 * - it lacks all of the P_F, P_ESC in WANTFLAGS, or
361 * - it lacks all of the P_E, P_L, P_K in WANTFLAGS, or
362 * - it lacks any of the other capabilities in WANTFLAGS, or
363 * - it has any of the capabilities in NOWANTFLAGS.
366 pln_capable(struct plnstr *pp, int wantflags, int nowantflags)
368 int flags = plchr[(int)pp->pln_type].pl_flags;
370 if (wantflags & (P_B | P_T)) {
371 if ((flags & wantflags & (P_B | P_T)) == 0)
373 wantflags &= ~(P_B | P_T);
376 if (wantflags & (P_F | P_ESC)) {
377 if ((flags & wantflags & (P_F | P_ESC)) == 0)
379 wantflags &= ~(P_F | P_ESC);
382 if (wantflags & (P_E | P_L | P_K)) {
383 if ((flags & wantflags & (P_E | P_L | P_K)) == 0)
385 wantflags &= ~(P_E | P_L | P_K);
388 if ((flags & wantflags) != wantflags)
391 if (flags & nowantflags)
398 * Return union of capabilities of planes in LIST.
401 pln_caps(struct emp_qelem *list)
403 struct emp_qelem *qp;
408 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
409 plp = (struct plist *)qp;
410 fl |= plp->pcp->pl_flags;
417 * Find plane types that can operate from carrier SP.
418 * If MSL find missile types, else non-missile types.
419 * Return a combination of P_L, P_K, P_E.
420 * It's zero if SP can't support air operations due to its type or
421 * state (low efficiency).
424 carrier_planes(struct shpstr *sp, int msl)
426 struct mchrstr *mcp = mchr + sp->shp_type;
429 if (sp->shp_effic < SHP_AIROPS_EFF)
433 if (mcp->m_flags & M_FLY)
435 if ((mcp->m_flags & M_MSL) && msl)
437 if (mcp->m_nchoppers && !msl)
445 pln_airbase_ok(struct plnstr *pp, int oneway, int noisy)
450 struct plchrstr *pcp = plchr + pp->pln_type;
452 if (CANT_HAPPEN(noisy && pp->pln_own != player->cnum))
455 if (pp->pln_ship >= 0) {
456 /* ship: needs to be own or allied, efficient */
457 if (!getship(pp->pln_ship, &ship)) {
461 if (relations_with(ship.shp_own, pp->pln_own) != ALLIED) {
463 pr("(note) An ally does not own the ship %s is on\n",
467 if (!(carrier_planes(&ship, pcp->pl_flags & P_M) & pcp->pl_flags))
470 } else if (pp->pln_land >= 0) {
471 /* land: needs to be own or allied, efficient, not embarked */
472 if (!getland(pp->pln_land, &land)) {
476 if (relations_with(land.lnd_own, pp->pln_own) != ALLIED) {
478 pr("(note) An ally does not own the unit %s is on\n",
482 if (land.lnd_effic < LND_AIROPS_EFF || !(pcp->pl_flags & P_E))
484 if (land.lnd_ship >= 0 || land.lnd_land >= 0)
488 /* sector: needs to be own or allied, efficient airfield */
489 if (!getsect(pp->pln_x, pp->pln_y, §)) {
494 if (relations_with(sect.sct_own, pp->pln_own) != ALLIED) {
496 pr("(note) An ally does not own the sector %s is in\n",
500 /* need airfield unless VTOL */
501 if ((pcp->pl_flags & P_V) == 0) {
502 if (sect.sct_type != SCT_AIRPT) {
504 pr("%s not at airport\n", prplane(pp));
507 if (sect.sct_effic < 40) {
509 pr("%s is not 40%% efficient, %s can't take off from there.\n",
510 xyas(sect.sct_x, sect.sct_y, player->cnum),
514 if (!oneway && sect.sct_effic < 60) {
516 pr("%s is not 60%% efficient, %s can't land there.\n",
517 xyas(sect.sct_x, sect.sct_y, player->cnum),
528 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
529 int ap_to_target, int rangemult, int wantflags, int nowantflags)
533 struct plchrstr *pcp;
537 while (nxtitem(ni, &plane)) {
539 * It would be nice to let deities fly foreign planes, but
540 * much of the code assumes that only the plane's owner can
543 if (!plane.pln_own || plane.pln_own != player->cnum)
545 if (plane.pln_mobil <= 0)
547 if (plane.pln_effic < 40) {
548 pr("%s not efficient enough (must be 40%%)\n",
552 if (!pln_capable(&plane, wantflags, nowantflags))
555 if (ontradingblock(EF_PLANE, &plane)) {
556 pr("plane #%d inelligible - it's for sale.\n",
562 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
564 pr("%s too far from assembly point\n", prplane(&plane));
567 range += ap_to_target;
569 pcp = &plchr[(int)plane.pln_type];
570 if (plane.pln_range < range) {
571 pr("%s out of range (%d:%d)\n",
572 prplane(&plane), plane.pln_range, range);
575 if (!pln_airbase_ok(&plane, rangemult != 2, 1))
577 pr("%s standing by\n", prplane(&plane));
578 plane.pln_mission = 0;
579 putplane(plane.pln_uid, &plane);
580 plp = malloc(sizeof(struct plist));
584 emp_insque(&plp->queue, list);
589 pln_arm(struct emp_qelem *list, int dist, char mission, struct ichrstr *ip)
591 struct emp_qelem *qp;
592 struct emp_qelem *next;
596 for (qp = list->q_forw; qp != list; qp = next) {
598 plp = (struct plist *)qp;
600 getplane(pp->pln_uid, pp);
601 if ((pp->pln_flags & PLN_LAUNCHED)
602 || pln_equip(plp, ip, mission) < 0) {
607 pp->pln_flags |= PLN_LAUNCHED;
608 pp->pln_mobil -= pln_mobcost(dist, pp, mission);
609 putplane(pp->pln_uid, pp);
610 pr("%s equipped\n", prplane(pp));
615 pln_equip(struct plist *plp, struct ichrstr *ip, char mission)
617 struct plchrstr *pcp;
630 if (pp->pln_ship >= 0) {
631 getship(pp->pln_ship, &ship);
632 item = ship.shp_item;
634 } else if (pp->pln_land >= 0) {
635 getland(pp->pln_land, &land);
636 item = land.lnd_item;
639 getsect(pp->pln_x, pp->pln_y, §);
640 item = sect.sct_item;
641 own = sect.sct_oldown;
643 if (pcp->pl_fuel > item[I_PETROL]) {
644 pr("%s not enough petrol there!\n", prplane(pp));
647 item[I_PETROL] -= pcp->pl_fuel;
651 case 's': /* strategic bomb */
652 case 'p': /* pinpoint bomb */
655 case 't': /* transport */
656 if (!(pcp->pl_flags & P_C) || !ip)
662 if ((pcp->pl_flags & P_MINE) == 0)
668 if (!(pcp->pl_flags & P_C) || CANT_HAPPEN(!ip))
671 if (pcp->pl_flags & P_V)
674 case 'a': /* paradrop */
675 if (!(pcp->pl_flags & P_P))
678 if (pcp->pl_flags & P_V)
681 case 'r': /* reconnaissance */
682 case 'e': /* escort */
685 case 'i': /* missile interception */
686 if (CANT_HAPPEN(!(pcp->pl_flags & P_M)
687 || !(pcp->pl_flags & (P_N | P_O))))
697 if (itype != I_NONE) {
698 needed = load / ichr[itype].i_lbs;
700 pr("%s can't contribute to mission\n", prplane(pp));
703 if (nuk_on_plane(pp) >= 0) {
704 if (mission == 's' || mission == 't')
707 pr("%s can't fly this mission"
708 " while it is carrying a nuclear weapon",
713 if (itype == I_CIVIL && pp->pln_own != own) {
714 pr("You don't control those civilians!\n");
718 /* Supply is broken somewhere, so don't use it for now */
719 if (itype == I_SHELL && item[itype] < needed)
720 item[itype] += supply_commod(plp->plane.pln_own,
725 if (pp->pln_ship >= 0 || pp->pln_land >= 0)
728 abandon_needed = !!would_abandon(§, itype, needed, NULL);
729 if (item[itype] < needed + abandon_needed) {
730 pr("Not enough %s for %s\n", ichr[itype].i_name, prplane(pp));
733 item[itype] -= needed;
737 if (pp->pln_ship >= 0) {
738 if (pp->pln_own != ship.shp_own) {
740 "%s %s prepares for takeoff from ship %s\n",
741 cname(pp->pln_own), prplane(pp), prship(&ship));
743 putship(ship.shp_uid, &ship);
744 } else if (pp->pln_land >= 0) {
745 if (pp->pln_own != land.lnd_own) {
747 "%s %s prepares for takeoff from unit %s\n",
748 cname(pp->pln_own), prplane(pp), prland(&land));
750 putland(land.lnd_uid, &land);
752 if (pp->pln_own != sect.sct_own) {
753 wu(0, sect.sct_own, "%s %s prepares for takeoff from %s\n",
754 cname(pp->pln_own), prplane(pp),
755 xyas(sect.sct_x, sect.sct_y, sect.sct_own));
763 pln_put(struct emp_qelem *list)
765 struct emp_qelem *qp, *next;
767 for (qp = list->q_forw; qp != list; qp = next) {
769 pln_put1((struct plist *)qp);
774 pln_put1(struct plist *plp)
782 if (CANT_HAPPEN((pp->pln_flags & PLN_LAUNCHED)
783 && (plchr[pp->pln_type].pl_flags & P_M)
784 && pp->pln_effic >= PLANE_MINEFF))
785 pp->pln_effic = 0; /* bug: missile launched but not used up */
787 if (!(pp->pln_flags & PLN_LAUNCHED))
788 ; /* never took off */
789 else if (pp->pln_effic < PLANE_MINEFF) {
791 } else if (pp->pln_ship >= 0) {
792 /* It is landing on a carrier */
793 getship(pp->pln_ship, &ship);
794 /* We should do more, like make sure it's really
795 a carrier, etc. but for now just make sure it's
797 if (ship.shp_effic < SHIP_MINEFF) {
799 "Ship #%d has been sunk, plane #%d has nowhere to land, and\n"
800 "splashes into the sea.\n",
801 pp->pln_ship, pp->pln_uid);
805 /* Presume we are landing back in a sector. */
806 getsect(pp->pln_x, pp->pln_y, §);
807 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
809 "Nowhere to land at %s, plane #%d crashes and burns...\n",
810 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
814 pp->pln_flags &= ~PLN_LAUNCHED;
815 putplane(pp->pln_uid, pp);
816 emp_remque(&plp->queue);
821 * Can a carrier of SP's type carry this load of planes?
822 * The load consists of N planes, of which NCH are choppers, NXL
823 * xlight, NMSL light missiles, and the rest are light fixed-wing
827 ship_can_carry(struct shpstr *sp, int n, int nch, int nxl, int nmsl)
829 struct mchrstr *mcp = &mchr[sp->shp_type];
830 int nfw = n - nch - nxl - nmsl;
832 if (nch > mcp->m_nchoppers) /* overflow into fixed-wing slots */
833 nfw += nch - mcp->m_nchoppers;
834 if (nxl > mcp->m_nxlight) /* overflow into missile slots */
835 nmsl += nxl - mcp->m_nxlight;
836 if (nmsl && !(mcp->m_flags & (M_MSL | M_FLY)))
837 return 0; /* missile slots wanted */
838 if (nfw && !(mcp->m_flags & M_FLY))
839 return 0; /* fixed-wing slots wanted */
840 return nfw + nmsl <= mcp->m_nplanes;
844 * Increment carrier plane counters for PP.
845 * If it's a chopper, increment *NCH.
846 * Else, if it's x-light, increment *NXL.
847 * Else, if it's a light missile, increment *MSL.
848 * Return non-zero if it's a chopper, x-light or light.
851 inc_shp_nplane(struct plnstr *pp, int *nch, int *nxl, int *nmsl)
853 struct plchrstr *pcp = &plchr[pp->pln_type];
855 if (pcp->pl_flags & P_K)
857 else if (pcp->pl_flags & P_E)
859 else if (!(pcp->pl_flags & P_L))
861 else if (pcp->pl_flags & P_M)
867 * Can PP be loaded on a ship of SP's type?
868 * Assume that it already carries N planes, of which NCH are choppers,
869 * NXL xlight, NMSL light missiles, and the rest are light fixed-wing
873 could_be_on_ship(struct plnstr *pp, struct shpstr *sp,
874 int n, int nch, int nxl, int nmsl)
876 if (!inc_shp_nplane(pp, &nch, &nxl, &nmsl))
879 return ship_can_carry(sp, n + 1, nch, nxl, nmsl);
883 * Fit a plane of PP's type on ship SP.
884 * Updating the plane accordingly is the caller's job.
885 * Return whether it fits.
888 fit_plane_on_ship(struct plnstr *pp, struct shpstr *sp)
890 int n, nch, nxl, nmsl;
892 n = shp_nplane(sp, &nch, &nxl, &nmsl);
893 return could_be_on_ship(pp, sp, n, nch, nxl, nmsl);
897 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
899 if (plane->pln_ship == ship->shp_uid)
900 return 1; /* Already on ship */
902 if (!fit_plane_on_ship(plane, ship))
905 plane->pln_x = ship->shp_x;
906 plane->pln_y = ship->shp_y;
907 plane->pln_ship = ship->shp_uid;
908 putplane(plane->pln_uid, plane);
913 * Fit a plane of PP's type on land unit LP.
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 return (pcp->pl_flags & P_E) && lnd_nxlight(lp) < lcp->l_nxlight;
927 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
929 if (plane->pln_land == land->lnd_uid)
930 return 1; /* Already on unit */
932 if (!fit_plane_on_land(plane, land))
935 plane->pln_x = land->lnd_x;
936 plane->pln_y = land->lnd_y;
937 plane->pln_land = land->lnd_uid;
938 putplane(plane->pln_uid, plane);
943 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
946 struct plchrstr *pcp;
947 struct emp_qelem *qp;
948 struct emp_qelem *next;
954 getsect(x, y, §);
955 mines_there = sect.sct_mines;
957 if (mines_there == 0)
960 if (sect.sct_type != SCT_WATER)
963 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
966 ip = (struct plist *)qp;
969 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
972 if (chance((100.0 - pln_acc(pp)) / 100.0)) {
974 xyas(sect.sct_x, sect.sct_y, player->cnum));
980 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
981 writemap(player->cnum);
982 sect.sct_mines = mines_there;
987 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
989 struct plchrstr *pcp = plchr + pp->pln_type;
990 double tfact = (double)(pp->pln_tech - pcp->pl_tech) /
991 (pp->pln_tech - pcp->pl_tech / 2);
992 int acc = pln_acc(pp);
995 if (type == EF_SHIP) {
996 if (pcp->pl_flags & P_A)
998 if (!(pcp->pl_flags & P_T))
1001 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
1002 (1.0 - acc / 100.0)) - hardtarget;
1004 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
1006 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
1007 if (hitchance > 100)
1013 pln_damage(struct plnstr *pp, char type, int noisy)
1015 struct plchrstr *pcp = plchr + pp->pln_type;
1016 int load, i, hitroll, aim, len;
1022 if (CANT_HAPPEN(nuk_on_plane(pp) >= 0))
1025 load = pln_load(pp);
1026 if (!load) /* e.g. ab, blowing up on launch pad */
1033 if (pcp->pl_flags & P_M) {
1034 if (pcp->pl_flags & P_MAR)
1036 } else if (pcp->pl_flags & P_T)
1041 effective = !pinbomber;
1042 aim = 30 + (pinbomber ? aim : 100 - aim);
1044 effective = pinbomber;
1051 hitroll = roll(100);
1052 if (hitroll >= 90) {
1055 len += sprintf(buf + len, "BLAM");
1056 } else if (hitroll < aim) {
1059 len += sprintf(buf + len, "Blam");
1063 len += sprintf(buf + len, "blam");
1067 mpr(pp->pln_own, "%s\n", buf);
1071 len += sprintf(buf + len, "-");
1075 mpr(pp->pln_own, "%s\n", buf);
1082 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1085 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1086 return (int)(100 - 100 * misschance * misschance);
1090 pln_mobcost(int dist, struct plnstr *pp, char mission)
1094 cost = 20.0 / (pp->pln_effic / 100.0);
1095 if (mission == 'e' || mission == 0)
1096 cost /= 2; /* escort or intercept */
1098 return ldround(cost * dist / pln_range_max(pp) + 5, 1);
1102 pln_is_in_orbit(struct plnstr *pp)
1104 return (plchr[pp->pln_type].pl_flags & (P_M | P_O)) == P_O
1105 && (pp->pln_flags & PLN_LAUNCHED);
1109 * Set PP's tech to TLEV along with everything else that depends on it.
1112 pln_set_tech(struct plnstr *pp, int tlev)
1114 struct plchrstr *pcp = plchr + pp->pln_type;
1115 int limited_range = pp->pln_range < pln_range_max(pp);
1118 if (CANT_HAPPEN(tlev < pcp->pl_tech))
1119 tlev = pcp->pl_tech;
1120 pp->pln_tech = tlev;
1122 range_max = pln_range_max(pp);
1123 if (!limited_range || pp->pln_range > range_max)
1124 pp->pln_range = range_max;