2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2009, 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 planes and escorts argument.
62 * Read planes into *NI_BOMB, and (optional) escorts into *NI_ESC.
63 * If INPUT_BOMB is not empty, use it, else prompt for more input.
65 * If we got a plane argument, initialize *NI_BOMB and *NI_ESC, and
67 * Else return -1 (*NI_BOMB and *NI_ESC may be modified).
70 get_planes(struct nstr_item *ni_bomb, struct nstr_item *ni_esc,
71 char *input_bomb, char *input_esc)
73 if (!snxtitem(ni_bomb, EF_PLANE, input_bomb, NULL))
75 if (!snxtitem(ni_esc, EF_PLANE, input_esc, "escort(s)? ")) {
78 pr("No escorts...\n");
84 * Get assembly point argument.
85 * If INPUT is not empty, use it, else prompt for more input using PROMPT.
86 * If this yields a valid assembly point, read it into *AP_SECT and
88 * Else complain and return NULL.
89 * *AP_SECT and BUF[1024] may be modified in either case.
92 get_assembly_point(char *input, struct sctstr *ap_sect, char *buf)
99 p = getstarg(input, "assembly point? ", buf);
102 if (!sarg_xy(p, &x, &y) || !getsect(x, y, ap_sect))
105 /* over own or allied sector is fine */
106 if (ap_sect->sct_own == player->cnum
107 || getrel(getnatp(ap_sect->sct_own), player->cnum) == ALLIED)
110 /* over own or allied ship is fine */
111 snxtitem_xy(&ni, EF_SHIP, x, y);
112 while (nxtitem(&ni, &ship)) {
113 if (ship.shp_effic < SHIP_MINEFF || ship.shp_own == 0)
115 if (ship.shp_own == player->cnum
116 || getrel(getnatp(ship.shp_own), player->cnum) == ALLIED)
120 pr("Assembly point not owned by you or an ally!\n");
125 pln_onewaymission(struct sctstr *target, int *shipno, int *flagp)
137 nships = carriersatxy(target->sct_x, target->sct_y, player->cnum);
140 p = getstring("Carrier #? ", buf);
147 || !getship(cno, &ship)
149 && (getrel(getnatp(ship.shp_own), player->cnum)
154 if (ship.shp_x != target->sct_x || ship.shp_y != target->sct_y) {
155 pr("Ship #%d not in %s\n", cno,
156 xyas(target->sct_x, target->sct_y, player->cnum));
159 fl = carrier_planes(&ship, 0);
161 pr("Can't land on %s.\n", prship(&ship));
164 /* clear to land on ship#CNO */
165 pr("landing on carrier %d\n", cno);
173 /* try to land at sector */
174 if (target->sct_own != player->cnum
175 && getrel(getnatp(target->sct_own), player->cnum) != ALLIED) {
176 pr("Nowhere to land at sector %s!\n",
177 xyas(target->sct_x, target->sct_y, player->cnum));
180 if (target->sct_type == SCT_MOUNT) {
181 pr("Nowhere to land at sector %s!\n",
182 xyas(target->sct_x, target->sct_y, player->cnum));
185 if (target->sct_type != SCT_AIRPT || target->sct_effic < 60)
188 /* clear to land at sector */
195 pln_oneway_to_carrier_ok(struct emp_qelem *bomb_list,
196 struct emp_qelem *esc_list, int cno)
198 struct emp_qelem *list, *qp;
202 if (cno < 0 || !getship(cno, &ship))
206 for (list = bomb_list;
208 list = list == bomb_list ? esc_list : NULL) {
209 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
210 plp = (struct plist *)qp;
211 if (plp->plane.pln_ship == ship.shp_uid)
213 if (!fit_plane_on_ship(&plp->plane, &ship))
221 pln_newlanding(struct emp_qelem *list, coord tx, coord ty, int cno)
223 struct emp_qelem *qp;
230 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
231 plp = (struct plist *)qp;
233 if (!could_be_on_ship(&plp->plane, &ship, 0, 0, 0, 0))
234 pr("\t%s cannot land on ship #%d! %s aborts!\n",
235 prplane(&plp->plane), cno, prplane(&plp->plane));
236 else if (!put_plane_on_ship(&plp->plane, &ship))
237 pr("\tNo room on ship #%d! %s aborts!\n",
238 cno, prplane(&plp->plane));
240 if (plp->plane.pln_own != ship.shp_own) {
241 wu(0, ship.shp_own, "%s %s lands on your %s\n",
242 cname(player->cnum), prplane(&plp->plane),
247 plp->plane.pln_x = tx;
248 plp->plane.pln_y = ty;
249 getsect(tx, ty, §);
250 if (plp->plane.pln_own != sect.sct_own) {
252 "%s %s lands at your sector %s\n",
254 prplane(&plp->plane), xyas(tx, ty, sect.sct_own));
256 plp->plane.pln_ship = cno;
262 pln_dropoff(struct emp_qelem *list, struct ichrstr *ip, coord tx, coord ty,
265 struct emp_qelem *qp;
276 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
277 plp = (struct plist *)qp;
281 getsect(tx, ty, §);
283 if (sect.sct_type == SCT_WATER)
284 pr("Your %s sink like a rock!\n", ip->i_name);
286 pr("Your %s vanish without a trace.\n", ip->i_name);
289 if (sect.sct_own != player->cnum
290 && getrel(getnatp(sect.sct_own), player->cnum) != ALLIED) {
291 pr("You don't own %s! Cargo jettisoned...\n",
292 xyas(tx, ty, player->cnum));
295 if (ip->i_uid == I_CIVIL && sect.sct_own != sect.sct_oldown) {
296 pr("%s is occupied. Your civilians suffer from identity crisis and die.\n",
297 xyas(tx, ty, player->cnum));
300 there = sect.sct_item[ip->i_uid];
304 there = ship.shp_item[ip->i_uid];
305 max = mchr[ship.shp_type].m_item[ip->i_uid];
309 pr("%d excess %s discarded\n", max - there, ip->i_name);
313 pr("%d %s landed safely", amt, ip->i_name);
315 sect.sct_item[ip->i_uid] = there;
316 if (sect.sct_own != player->cnum)
317 wu(0, sect.sct_own, "%s planes drop %d %s in %s\n",
318 cname(player->cnum), amt, ip->i_name,
319 xyas(tx, ty, sect.sct_own));
320 pr(" at %s\n", xyas(tx, ty, player->cnum));
323 ship.shp_item[ip->i_uid] = there;
324 if (ship.shp_own != player->cnum)
325 wu(0, ship.shp_own, "%s planes land %d %s on carrier %d\n",
326 cname(player->cnum), amt, ip->i_name, ship.shp_uid);
327 pr(" on carrier #%d\n", ship.shp_uid);
328 putship(ship.shp_uid, &ship);
333 pln_mine(struct emp_qelem *list, coord tx, coord ty)
335 struct emp_qelem *qp;
341 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
342 plp = (struct plist *)qp;
347 getsect(tx, ty, §);
348 if (sect.sct_type != SCT_WATER) {
349 pr("Your seamines have no effect here.\n");
352 sect.sct_mines = MIN(sect.sct_mines + amt, MINES_MAX);
353 pr("%d mines laid in %s.\n", amt, xyas(tx, ty, player->cnum));
354 if (map_set(player->cnum, tx, ty, 'X', 0))
355 writemap(player->cnum);
361 * Has PP's type capabilities satisfying WANTFLAGS and NOWANTFLAGS?
362 * A plane type is capable unless
363 * - it lacks all of the P_F, P_ESC in WANTFLAGS, or
364 * - it lacks all of the P_E, P_L, P_K in WANTFLAGS, or
365 * - it lacks any of the other capabilities in WANTFLAGS, or
366 * - it has any of the capabilities in NOWANTFLAGS.
369 pln_capable(struct plnstr *pp, int wantflags, int nowantflags)
371 int flags = plchr[(int)pp->pln_type].pl_flags;
373 if (wantflags & (P_F | P_ESC)) {
374 if ((flags & wantflags & (P_F | P_ESC)) == 0)
376 wantflags &= ~(P_F | P_ESC);
379 if (wantflags & (P_E | P_L | P_K)) {
380 if ((flags & wantflags & (P_E | P_L | P_K)) == 0)
382 wantflags &= ~(P_E | P_L | P_K);
385 if ((flags & wantflags) != wantflags)
388 if (flags & nowantflags)
395 * Find plane types that can operate from carrier SP.
396 * If MSL find missile types, else non-missile types.
397 * Return a combination of P_L, P_K, P_E.
398 * It's zero if SP can't support air operations due to its type or
399 * state (low efficiency).
402 carrier_planes(struct shpstr *sp, int msl)
404 struct mchrstr *mcp = mchr + sp->shp_type;
407 if (sp->shp_effic < SHP_AIROPS_EFF)
411 if (mcp->m_flags & M_FLY)
413 if ((mcp->m_flags & M_MSL) && msl)
415 if (mcp->m_nchoppers && !msl)
423 pln_airbase_ok(struct plnstr *pp, int oneway, int noisy)
428 struct plchrstr *pcp = plchr + pp->pln_type;
430 if (CANT_HAPPEN(noisy && pp->pln_own != player->cnum))
433 if (pp->pln_ship >= 0) {
434 /* ship: needs to be own or allied, efficient */
435 if (!getship(pp->pln_ship, &ship)) {
439 if (ship.shp_own != pp->pln_own
440 && getrel(getnatp(ship.shp_own), pp->pln_own) != ALLIED) {
442 pr("(note) An ally does not own the ship %s is on\n",
446 if (!(carrier_planes(&ship, pcp->pl_flags & P_M) & pcp->pl_flags))
449 } else if (pp->pln_land >= 0) {
450 /* land: needs to be own or allied, efficient, not embarked */
451 if (!getland(pp->pln_land, &land)) {
455 if (land.lnd_own != pp->pln_own
456 && getrel(getnatp(land.lnd_own), pp->pln_own) != ALLIED) {
458 pr("(note) An ally does not own the unit %s is on\n",
462 if (land.lnd_effic < LND_AIROPS_EFF || !(pcp->pl_flags & P_E))
464 if (land.lnd_ship >= 0 || land.lnd_land >= 0)
468 /* sector: needs to be own or allied, efficient airfield */
469 if (!getsect(pp->pln_x, pp->pln_y, §)) {
474 if (sect.sct_own != pp->pln_own
475 && getrel(getnatp(sect.sct_own), pp->pln_own) != ALLIED) {
477 pr("(note) An ally does not own the sector %s is in\n",
481 /* need airfield unless VTOL */
482 if ((pcp->pl_flags & P_V) == 0) {
483 if (sect.sct_type != SCT_AIRPT) {
485 pr("%s not at airport\n", prplane(pp));
488 if (sect.sct_effic < 40) {
490 pr("%s is not 40%% efficient, %s can't take off from there.\n",
491 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
495 if (!oneway && sect.sct_effic < 60) {
497 pr("%s is not 60%% efficient, %s can't land there.\n",
498 xyas(sect.sct_x, sect.sct_y, pp->pln_own),
509 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
510 int ap_to_target, int rangemult, int wantflags, int nowantflags)
514 struct plchrstr *pcp;
518 while (nxtitem(ni, &plane)) {
521 if (plane.pln_mobil <= 0)
523 if (plane.pln_effic < 40) {
524 pr("%s not efficient enough (must be 40%%)\n",
528 if (!pln_capable(&plane, wantflags, nowantflags))
531 if (ontradingblock(EF_PLANE, &plane)) {
532 pr("plane #%d inelligible - it's for sale.\n",
538 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
540 pr("%s too far from assembly point\n", prplane(&plane));
543 range += ap_to_target;
545 pcp = &plchr[(int)plane.pln_type];
546 if (plane.pln_range < range) {
547 pr("%s out of range (%d:%d)\n",
548 prplane(&plane), plane.pln_range, range);
551 if (!pln_airbase_ok(&plane, rangemult != 2, 1))
553 pr("%s standing by\n", prplane(&plane));
554 plane.pln_mission = 0;
555 putplane(plane.pln_uid, &plane);
556 plp = malloc(sizeof(struct plist));
561 emp_insque(&plp->queue, list);
566 pln_arm(struct emp_qelem *list, int dist, char mission, struct ichrstr *ip,
569 struct emp_qelem *qp;
570 struct emp_qelem *next;
574 for (qp = list->q_forw; qp != list; qp = next) {
576 plp = (struct plist *)qp;
578 getplane(pp->pln_uid, pp);
579 if ((pp->pln_flags & PLN_LAUNCHED)
580 || pln_equip(plp, ip, flags, mission) < 0) {
585 pp->pln_flags |= PLN_LAUNCHED;
586 pp->pln_mobil -= pln_mobcost(dist, pp, flags);
587 putplane(pp->pln_uid, pp);
588 pr("%s equipped\n", prplane(pp));
593 pln_equip(struct plist *plp, struct ichrstr *ip, int flags, char mission)
595 struct plchrstr *pcp;
608 if (pp->pln_ship >= 0) {
609 getship(pp->pln_ship, &ship);
610 item = ship.shp_item;
612 } else if (pp->pln_land >= 0) {
613 getland(pp->pln_land, &land);
614 item = land.lnd_item;
617 getsect(pp->pln_x, pp->pln_y, §);
618 item = sect.sct_item;
619 own = sect.sct_oldown;
622 if (ip->i_uid == I_CIVIL) {
623 if (pp->pln_own != own) {
624 pr("You don't control those civilians!\n");
629 if (pcp->pl_fuel > item[I_PETROL]) {
630 pr("%s not enough petrol there!\n", prplane(pp));
633 item[I_PETROL] -= pcp->pl_fuel;
634 if ((flags & P_F) == 0) {
639 case 's': /* strategic bomb */
640 case 'p': /* pinpoint bomb */
641 if (nuk_on_plane(pp) < 0) {
646 case 't': /* transport */
648 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
651 needed = (load * 2) / ip->i_lbs;
654 if ((pcp->pl_flags & P_MINE) == 0)
657 needed = (load * 2) / ip->i_lbs;
659 case 'a': /* paradrop */
660 if ((pcp->pl_flags & (P_V | P_C)) == 0)
663 needed = load / ip->i_lbs;
665 case 'r': /* reconnaissance */
670 if (itype != I_NONE && needed <= 0) {
671 pr("%s can't contribute to mission\n", prplane(pp));
674 if (itype != I_NONE) {
676 /* Supply is broken somewhere, so don't use it for now */
677 if (itype == I_SHELL && item[itype] < needed)
678 item[itype] += supply_commod(plp->plane.pln_own,
683 abandon_needed = !!would_abandon(§, itype, needed, NULL);
684 if (item[itype] < needed + abandon_needed) {
685 pr("Not enough %s for %s\n", ichr[itype].i_name, prplane(pp));
688 item[itype] -= needed;
690 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
695 if (pp->pln_ship >= 0) {
696 if (pp->pln_own != ship.shp_own) {
698 "%s %s prepares for takeoff from ship %s\n",
699 cname(pp->pln_own), prplane(pp), prship(&ship));
701 putship(ship.shp_uid, &ship);
702 } else if (pp->pln_land >= 0) {
703 if (pp->pln_own != land.lnd_own) {
705 "%s %s prepares for takeoff from unit %s\n",
706 cname(pp->pln_own), prplane(pp), prland(&land));
708 putland(land.lnd_uid, &land);
710 if (pp->pln_own != sect.sct_own) {
711 wu(0, sect.sct_own, "%s %s prepares for takeoff from %s\n",
712 cname(pp->pln_own), prplane(pp),
713 xyas(sect.sct_x, sect.sct_y, sect.sct_own));
721 pln_put(struct emp_qelem *list)
723 struct emp_qelem *qp, *next;
725 for (qp = list->q_forw; qp != list; qp = next) {
727 pln_put1((struct plist *)qp);
732 pln_put1(struct plist *plp)
740 if (CANT_HAPPEN((pp->pln_flags & PLN_LAUNCHED)
741 && (plchr[pp->pln_type].pl_flags & P_M)
742 && pp->pln_effic >= PLANE_MINEFF))
743 pp->pln_effic = 0; /* bug: missile launched but not used up */
745 if (!(pp->pln_flags & PLN_LAUNCHED))
746 ; /* never took off */
747 else if (pp->pln_effic < PLANE_MINEFF) {
749 } else if (pp->pln_ship >= 0) {
750 /* It is landing on a carrier */
751 getship(pp->pln_ship, &ship);
752 /* We should do more, like make sure it's really
753 a carrier, etc. but for now just make sure it's
755 if (ship.shp_effic < SHIP_MINEFF) {
757 "Ship #%d has been sunk, plane #%d has nowhere to land, and\n"
758 "splashes into the sea.\n",
759 pp->pln_ship, pp->pln_uid);
763 /* Presume we are landing back in a sector. */
764 getsect(pp->pln_x, pp->pln_y, §);
765 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
767 "Nowhere to land at %s, plane #%d crashes and burns...\n",
768 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
772 pp->pln_flags &= ~PLN_LAUNCHED;
773 putplane(pp->pln_uid, pp);
774 emp_remque(&plp->queue);
779 * Can PP be loaded on a ship of SP's type?
780 * Assume that it already carries N planes, of which NCH are choppers,
781 * NXL xlight, NMSL light missiles, and the rest are light fixed-wing
785 could_be_on_ship(struct plnstr *pp, struct shpstr *sp,
786 int n, int nch, int nxl, int nmsl)
788 struct plchrstr *pcp = &plchr[pp->pln_type];
789 struct mchrstr *mcp = &mchr[sp->shp_type];
791 if (pcp->pl_flags & P_K)
793 else if (pcp->pl_flags & P_E)
795 else if (!(pcp->pl_flags & P_L))
797 else if (pcp->pl_flags & P_M)
801 n -= MIN(nch, mcp->m_nchoppers);
802 n -= MIN(nxl, mcp->m_nxlight);
803 if (nmsl && !(mcp->m_flags & (M_MSL | M_FLY)))
804 return 0; /* missile slots wanted */
805 if (nmsl < n && !(mcp->m_flags & M_FLY))
806 return 0; /* fixed-wing slots wanted */
807 return n <= mcp->m_nplanes;
811 * Fit a plane of PP's type on ship SP.
812 * Updating the plane accordingly is the caller's job.
813 * Return whether it fits.
816 fit_plane_on_ship(struct plnstr *pp, struct shpstr *sp)
818 int n, nch, nxl, nmsl;
820 n = shp_nplane(sp, &nch, &nxl, &nmsl);
821 return could_be_on_ship(pp, sp, n, nch, nxl, nmsl);
825 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
827 if (plane->pln_ship == ship->shp_uid)
828 return 1; /* Already on ship */
830 if (!fit_plane_on_ship(plane, ship))
833 plane->pln_x = ship->shp_x;
834 plane->pln_y = ship->shp_y;
835 plane->pln_ship = ship->shp_uid;
836 putplane(plane->pln_uid, plane);
841 * Fit a plane of PP's type on land unit LP.
842 * Updating the plane accordingly is the caller's job.
843 * Return whether it fits.
846 fit_plane_on_land(struct plnstr *pp, struct lndstr *lp)
848 struct plchrstr *pcp = plchr + pp->pln_type;
849 struct lchrstr *lcp = lchr + lp->lnd_type;
851 return (pcp->pl_flags & P_E) && lnd_nxlight(lp) < lcp->l_nxlight;
855 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
857 if (plane->pln_land == land->lnd_uid)
858 return 1; /* Already on unit */
860 if (!fit_plane_on_land(plane, land))
863 plane->pln_x = land->lnd_x;
864 plane->pln_y = land->lnd_y;
865 plane->pln_land = land->lnd_uid;
866 putplane(plane->pln_uid, plane);
871 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
874 struct plchrstr *pcp;
875 struct emp_qelem *qp;
876 struct emp_qelem *next;
882 getsect(x, y, §);
883 mines_there = sect.sct_mines;
885 if (mines_there == 0)
888 if ((sect.sct_type != SCT_WATER) && (sect.sct_type != SCT_HARBR))
891 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
894 ip = (struct plist *)qp;
897 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
900 if (chance((100.0 - pln_acc(pp)) / 100.0)) {
902 xyas(sect.sct_x, sect.sct_y, pp->pln_own));
908 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
909 writemap(player->cnum);
910 sect.sct_mines = mines_there;
915 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
917 struct plchrstr *pcp = plchr + pp->pln_type;
918 double tfact = (double)(pp->pln_tech - pcp->pl_tech) /
919 (pp->pln_tech - pcp->pl_tech / 2);
920 int acc = pln_acc(pp);
923 if (type == EF_SHIP) {
924 if (pcp->pl_flags & P_A)
926 if (!(pcp->pl_flags & P_T))
929 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
930 (1.0 - acc / 100.0)) - hardtarget;
932 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
934 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
940 /* return 0 if there was a nuclear detonation */
943 pln_damage(struct plnstr *pp, coord x, coord y, char type, int *nukedamp,
947 struct plchrstr *pcp = plchr + pp->pln_type;
955 if (getnuke(nuk_on_plane(pp), &nuke)) {
956 mpr(pp->pln_own, "Releasing RV's for %s detonation...\n",
957 pp->pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
958 *nukedamp = detonate(&nuke, x, y,
959 pp->pln_flags & PLN_AIRBURST);
965 if (!load) /* e.g. ab, blowing up on launch pad */
972 if (pcp->pl_flags & P_M) {
973 if (pcp->pl_flags & P_MAR)
975 } else if (pcp->pl_flags & P_T)
980 effective = !pinbomber;
981 aim = 30 + (pinbomber ? aim : 100 - aim);
983 effective = pinbomber;
993 mpr(pp->pln_own, "BLAM");
994 } else if (hitroll < aim) {
997 mpr(pp->pln_own, "Blam");
1001 mpr(pp->pln_own, "blam");
1004 mpr(pp->pln_own, "-");
1007 mpr(pp->pln_own, "\n");
1014 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1017 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1018 return (int)(100 - 100 * misschance * misschance);
1022 pln_mobcost(int dist, struct plnstr *pp, int flags)
1026 cost = 20.0 / (pp->pln_effic / 100.0);
1027 if ((flags & P_F) || (flags & P_ESC))
1030 return ldround(cost * dist / pln_range_max(pp) + 5, 1);
1034 pln_is_in_orbit(struct plnstr *pp)
1036 return (plchr[pp->pln_type].pl_flags & (P_M | P_O)) == P_O
1037 && (pp->pln_flags & PLN_LAUNCHED);
1041 * Set PP's tech to TLEV along with everything else that depends on it.
1044 pln_set_tech(struct plnstr *pp, int tlev)
1046 struct plchrstr *pcp = plchr + pp->pln_type;
1047 int limited_range = pp->pln_range < pln_range_max(pp);
1050 if (CANT_HAPPEN(tlev < pcp->pl_tech))
1051 tlev = pcp->pl_tech;
1052 pp->pln_tech = tlev;
1054 range_max = pln_range_max(pp);
1055 if (!limited_range || pp->pln_range > range_max)
1056 pp->pln_range = range_max;