2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2000, 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 the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * 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
51 #include "prototypes.h"
54 static int pln_equip(struct plist *, struct ichrstr *, int, s_char);
57 pln_onewaymission(struct sctstr *target, int *shipno, int *flagp)
68 if ((target->sct_own && target->sct_own != player->cnum &&
69 (getrel(getnatp(target->sct_own), player->cnum) != ALLIED)) &&
70 (target->sct_type != SCT_HARBR) &&
71 (target->sct_type != SCT_BSPAN)) {
72 pr("Nowhere to land at sector %s!\n",
73 xyas(target->sct_x, target->sct_y, player->cnum));
76 if (target->sct_type == SCT_MOUNT) {
77 pr("Nowhere to land at sector %s!\n",
78 xyas(target->sct_x, target->sct_y, player->cnum));
82 if (target->sct_type != SCT_AIRPT || target->sct_effic < 60)
84 if (target->sct_type == SCT_WATER || target->sct_type == SCT_HARBR
85 || target->sct_type == SCT_BSPAN) {
86 nships = carriersatxy(target->sct_x, target->sct_y,
87 M_FLY | M_CHOPPER, 0, player->cnum);
89 if (target->sct_type == SCT_WATER) {
90 pr("Nowhere to land at sector %s!\n",
91 xyas(target->sct_x, target->sct_y, player->cnum));
94 if ((target->sct_own && target->sct_own != player->cnum)
95 && (getrel(getnatp(target->sct_own), player->cnum) !=
97 pr("Nowhere to land at sector %s!\n",
98 xyas(target->sct_x, target->sct_y, player->cnum));
109 if (!(p = getstarg(0, "Carrier #? ", buf)) || !*p)
112 if (n < 0 || !getship(n, &ship)
114 && (getrel(getnatp(ship.shp_own), player->cnum)
119 if (ship.shp_x != target->sct_x || ship.shp_y != target->sct_y) {
120 pr("Ship #%d not in %s\n", n,
121 xyas(target->sct_x, target->sct_y, player->cnum));
124 if (!(mchr[(int)ship.shp_type].m_flags & M_FLY)
125 && !(mchr[(int)ship.shp_type].m_flags & M_XLIGHT)
126 && !(mchr[(int)ship.shp_type].m_flags & M_CHOPPER)
128 pr("Can't land on %s.\n", prship(&ship));
131 pr("landing on carrier %d\n", n);
134 if (mchr[(int)ship.shp_type].m_flags & M_FLY)
136 if (mchr[(int)ship.shp_type].m_flags & M_CHOPPER)
138 if (mchr[(int)ship.shp_type].m_flags & M_XLIGHT)
141 if ((target->sct_own && target->sct_own != player->cnum) &&
142 (getrel(getnatp(target->sct_own), player->cnum) != ALLIED) &&
144 pr("Nowhere to land at sector %s!\n",
145 xyas(target->sct_x, target->sct_y, player->cnum));
150 if ((target->sct_own == 0) && (cno < 0)) {
151 pr("Nowhere to land at sector %s!\n",
152 xyas(target->sct_x, target->sct_y, player->cnum));
162 pln_newlanding(struct emp_qelem *list, coord tx, coord ty, int cno)
164 struct emp_qelem *qp;
171 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
172 plp = (struct plist *)qp;
173 /* XXX - need to restrict # of planes per ship */
176 if (!can_be_on_ship(plp->plane.pln_uid, ship.shp_uid))
177 pr("\t%s cannot land on ship #%d! %s aborts!\n",
178 prplane(&plp->plane), cno, prplane(&plp->plane));
179 else if (!put_plane_on_ship(&plp->plane, &ship))
180 pr("\tNo room on ship #%d! %s aborts!\n", cno,
181 prplane(&plp->plane));
183 if (plp->plane.pln_own != ship.shp_own) {
184 /* plp->plane.pln_own = ship.shp_own;*/
186 "%s %s lands on your %s\n",
188 prplane(&plp->plane), prship(&ship));
192 plp->plane.pln_x = tx;
193 plp->plane.pln_y = ty;
194 getsect(tx, ty, §);
195 if (plp->plane.pln_own != sect.sct_own) {
196 /* plp->plane.pln_own = sect.sct_own;*/
198 "%s %s lands at your sector %s\n",
200 prplane(&plp->plane), xyas(tx, ty, sect.sct_own));
202 plp->plane.pln_ship = cno;
206 putship(ship.shp_uid, &ship);
210 pln_dropoff(struct emp_qelem *list, struct ichrstr *ip, coord tx, coord ty,
211 s_char *ptr, int type)
213 struct emp_qelem *qp;
224 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
225 plp = (struct plist *)qp;
228 if (type == EF_SECTOR &&
229 (((struct sctstr *)ptr)->sct_type == SCT_WATER) &&
230 ip->i_vtype == V_SHELL) {
231 ((struct sctstr *)ptr)->sct_mines += amt;
232 pr("%d mines laid in %s.\n", amt,
233 xyas(((struct sctstr *)ptr)->sct_x,
234 ((struct sctstr *)ptr)->sct_y, player->cnum));
236 map_set(player->cnum, ((struct sctstr *)ptr)->sct_x,
237 ((struct sctstr *)ptr)->sct_y, 'X', 0))
238 writemap(player->cnum);
239 putsect((struct sctstr *)ptr);
241 if (type == EF_SHIP) {
242 ship = (struct shpstr *)ptr;
243 there = ship->shp_item[ip->i_vtype];
244 mp = &mchr[(int)ship->shp_type];
245 max = vl_find(ip->i_vtype, mp->m_vtype,
246 mp->m_vamt, (int)mp->m_nv);
248 there = ((struct sctstr *)ptr)->sct_item[ip->i_vtype];
253 pr("%d excess %s discarded\n", max - there, ip->i_name);
257 pr("%d %s landed safely", amt, ip->i_name);
258 if (type == EF_SECTOR) {
259 struct sctstr *sectp = (struct sctstr *)ptr;
260 sectp->sct_item[ip->i_vtype] = there;
261 if (sectp->sct_own != player->cnum)
262 wu(0, sectp->sct_own, "%s planes drop %d %s in %s\n",
263 cname(player->cnum), amt, ip->i_name,
264 xyas(sectp->sct_x, sectp->sct_y, sectp->sct_own));
265 pr(" at %s\n", xyas(tx, ty, player->cnum));
266 putsect((struct sctstr *)ptr);
268 struct shpstr *sp = (struct shpstr *)ptr;
269 sp->shp_item[ip->i_vtype] = there;
270 if (sp->shp_own != player->cnum)
271 wu(0, sp->shp_own, "%s planes land %d %s on carrier %d\n",
272 cname(player->cnum), amt, ip->i_name, sp->shp_uid);
273 pr(" on carrier #%d\n", ship->shp_uid);
274 putship(ship->shp_uid, ship);
280 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
281 int ap_to_target, int rangemult, int wantflags, int nowantflags)
288 struct plchrstr *pcp;
291 register int bad, bad1;
295 while (nxtitem(ni, (s_char *)&plane)) {
298 if (plane.pln_mobil <= (s_char)0)
301 if (ontradingblock(EF_PLANE, (int *)&plane)) {
302 pr("plane #%d inelligible - it's for sale.\n",
308 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
310 pr("%s too far from assembly point\n", prplane(&plane));
313 if (plane.pln_effic < 40) {
314 pr("%s not efficient enough (must be 40%%)\n",
318 range += ap_to_target;
319 pcp = &plchr[(int)plane.pln_type];
323 for (x = 0; x < sizeof(wantflags) * 8; x++) {
325 if ((wantflags & y) == y)
326 if ((pcp->pl_flags & y) != y) {
345 if ((pcp->pl_flags & P_ESC) || (pcp->pl_flags & P_F))
349 if ((wantflags & P_L) && (pcp->pl_flags & P_L))
351 if ((wantflags & P_K) && (pcp->pl_flags & P_K))
353 if ((wantflags & P_E) && (pcp->pl_flags & P_E))
362 for (x = 0; x < sizeof(nowantflags) * 8; x++) {
364 if ((nowantflags & y) == y)
365 if ((pcp->pl_flags & y) == y)
372 if (plane.pln_range < range) {
373 pr("%s out of range (%d:%d)\n", prplane(&plane),
374 plane.pln_range, range);
377 if (plane.pln_ship >= 0) {
378 if (!getship(plane.pln_ship, &ship) ||
379 plane.pln_own != player->cnum) {
382 pr("(note) ship not valid for %s\n", prplane(&plane));
383 putplane(plane.pln_uid, &plane);
386 if (!can_be_on_ship(plane.pln_uid, ship.shp_uid))
388 if (ship.shp_effic < SHIP_MINEFF)
390 if (ship.shp_effic < 50)
392 /* Can't fly off non-owned ships or non-allied ship */
393 if ((ship.shp_own != player->cnum) &&
394 (getrel(getnatp(ship.shp_own), player->cnum) != ALLIED)) {
395 pr("(note) An ally does not own the ship %s is on\n",
400 if (plane.pln_land >= 0) {
401 if (!getland(plane.pln_land, &land) ||
402 (plane.pln_own != player->cnum)) {
405 pr("(note) land unit not valid for %s\n", prplane(&plane));
406 putplane(plane.pln_uid, &plane);
409 if (!(plchr[(int)plane.pln_type].pl_flags & P_E))
411 if (land.lnd_effic < LAND_MINEFF)
413 if (land.lnd_effic < 50)
415 /* Can't fly off units in ships or other units */
416 if ((land.lnd_ship >= 0) || (land.lnd_land >= 0))
418 /* Can't fly off non-owned units or non-allied unit */
419 if ((land.lnd_own != player->cnum) &&
420 (getrel(getnatp(land.lnd_own), player->cnum) != ALLIED)) {
421 pr("(note) An ally does not own the unit %s is on\n",
426 /* Now, check the sector status if not on a plane or unit */
427 if ((plane.pln_ship < 0) && (plane.pln_land < 0)) {
428 if (!getsect(plane.pln_x, plane.pln_y, §))
430 /* First, check allied status */
431 /* Can't fly from non-owned sectors or non-allied sectors */
432 if ((sect.sct_own != player->cnum) &&
433 (getrel(getnatp(sect.sct_own), player->cnum) != ALLIED)) {
434 pr("(note) An ally does not own the sector %s is in\n",
439 if ((pcp->pl_flags & P_V) == 0) {
440 if (sect.sct_type != SCT_AIRPT) {
441 pr("%s not at airport\n", prplane(&plane));
444 if (sect.sct_effic < 40) {
445 pr("%s is not 40%% efficient, %s can't take off from there.\n", xyas(sect.sct_x, sect.sct_y, plane.pln_own), prplane(&plane));
448 if (rangemult == 2 && sect.sct_effic < 60) {
449 pr("%s is not 60%% efficient, %s can't land there.\n",
450 xyas(sect.sct_x, sect.sct_y, plane.pln_own),
456 pr("%s standing by\n", prplane(&plane));
457 plane.pln_mission = 0;
458 putplane(plane.pln_uid, &plane);
459 plp = (struct plist *)malloc(sizeof(struct plist));
465 emp_insque(&plp->queue, list);
470 pln_arm(struct emp_qelem *list, int dist, int mission, struct ichrstr *ip,
471 int flags, int mission_flags, int *tech)
473 struct emp_qelem *qp;
474 struct emp_qelem *next;
479 for (qp = list->q_forw; qp != list; qp = next) {
481 plp = (struct plist *)qp;
482 if (pln_equip(plp, ip, flags, mission) < 0) {
487 if (flags & (P_S | P_I)) {
488 if (plp->pcp->pl_flags & P_S)
489 mission_flags |= P_S;
490 if (plp->pcp->pl_flags & P_I)
491 mission_flags |= P_I;
493 if (*tech > plp->plane.pln_tech)
494 *tech = plp->plane.pln_tech;
495 if (!(plp->pcp->pl_flags & P_H))
496 /* no stealth on this mission */
497 mission_flags &= ~P_H;
498 if (!(plp->pcp->pl_flags & P_X))
499 /* no stealth on this mission */
500 mission_flags &= ~P_X;
501 if (!(plp->pcp->pl_flags & P_A)) {
502 /* no asw on this mission */
503 mission_flags &= ~P_A;
505 if (!(plp->pcp->pl_flags & P_MINE)) {
506 /* no asw on this mission */
507 mission_flags &= ~P_MINE;
509 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
510 pr("%s equipped\n", prplane(&plp->plane));
512 return mission_flags;
516 pln_equip(struct plist *plp, struct ichrstr *ip, int flags, s_char mission)
518 register struct plchrstr *pcp;
533 if (pp->pln_ship >= 0) {
534 getship(pp->pln_ship, &ship);
536 ptr = (s_char *)&ship;
538 } else if (pp->pln_land >= 0) {
539 getland(pp->pln_land, &land);
541 ptr = (s_char *)&land;
544 getsect(pp->pln_x, pp->pln_y, §);
546 ptr = (s_char *)§
547 own = sect.sct_oldown;
550 if (ip->i_vtype == V_CIVIL) {
551 if (pp->pln_own != own) {
552 pr("You don't control those civilians!\n");
557 getvec(VT_ITEM, vec, ptr, type);
558 if (pcp->pl_fuel > vec[I_PETROL]) {
559 pr("%s not enough petrol there!\n", prplane(pp));
562 vec[I_PETROL] -= pcp->pl_fuel;
564 if ((flags & P_F) == 0) {
570 if (pp->pln_nuketype == -1) {
572 needed = pp->pln_load;
576 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
579 needed = (pp->pln_load * 2) / ip->i_lbs;
583 needed = (pp->pln_load * 2) / ip->i_lbs;
584 /* Is this mine dropping excursion? */
585 if ((item == I_SHELL) && (pcp->pl_flags & P_MINE))
587 /* Is this a cargo drop? */
588 if ((pcp->pl_flags & P_C) == 0 || ip == 0) {
595 if ((pcp->pl_flags & (P_V | P_C)) == 0)
598 needed = pp->pln_load / ip->i_lbs;
601 if (pp->pln_nuketype == (s_char)-1)
607 if (rval < 0 || (item && needed <= 0)) {
608 pr("%s can't contribute to mission\n", prplane(pp));
612 /* Supply is broken somewhere, so don't use it for now */
613 if ((vec[item] < needed) && (item == I_SHELL))
614 vec[item] += supply_commod(plp->plane.pln_own,
615 plp->plane.pln_x, plp->plane.pln_y,
618 if (vec[item] < needed) {
619 pr("Not enough %s for %s\n", ichr[item].i_name, prplane(pp));
624 if (item == I_SHELL && (mission == 's' || mission == 'p'))
629 putvec(VT_ITEM, vec, ptr, type);
630 if (type == EF_SHIP) {
631 if (pp->pln_own != ship.shp_own) {
633 "%s %s prepares for takeoff from ship %s\n",
634 cname(pp->pln_own), prplane(pp), prship(&ship));
636 putship(ship.shp_uid, &ship);
637 } else if (type == EF_LAND) {
638 if (pp->pln_own != land.lnd_own) {
640 "%s %s prepares for takeoff from unit %s\n",
641 cname(pp->pln_own), prplane(pp), prland(&land));
643 putland(land.lnd_uid, &land);
645 if (pp->pln_own != sect.sct_own) {
646 wu(0, sect.sct_own, "%s %s prepares for takeoff from %s\n",
647 cname(pp->pln_own), prplane(pp), xyas(sect.sct_x,
657 pln_put(struct emp_qelem *list)
659 register struct emp_qelem *qp;
660 register struct emp_qelem *newqp;
666 /* Here is where planes return home from bombing runs.
667 We need to make sure they still have somewhere to return
671 plp = (struct plist *)qp;
673 /* Ok, check out where it wants to land */
674 if (pp->pln_ship >= 0) {
675 /* It is landing on a carrier */
676 getship(pp->pln_ship, &ship);
677 /* We should do more, like make sure it's really
678 a carrier, etc. but for now just make sure it's
680 if (ship.shp_effic < SHIP_MINEFF) {
682 "Ship #%d has been sunk, plane #%d has nowhere to land, and\nsplashes into the sea.\n",
683 pp->pln_ship, pp->pln_uid);
687 /* Presume we are landing back in a sector. */
688 getsect(pp->pln_x, pp->pln_y, §);
689 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
691 "Nowwhere to land at %s, plane #%d crashes and burns...\n",
692 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
696 putplane(pp->pln_uid, pp);
705 pln_removedupes(struct emp_qelem *bomb_list, struct emp_qelem *esc_list)
707 struct emp_qelem *bomb;
708 struct emp_qelem *esc;
712 if (QEMPTY(bomb_list) || QEMPTY(esc_list))
714 bomb = bomb_list->q_forw;
715 while (bomb != bomb_list) {
716 if (QEMPTY(esc_list)) {
720 esc = esc_list->q_forw;
721 bombp = (struct plist *)bomb;
722 while (esc != esc_list) {
723 escp = (struct plist *)esc;
724 if (escp->plane.pln_uid == bombp->plane.pln_uid) {
736 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
738 struct plchrstr *pcp;
741 pcp = &plchr[(int)plane->pln_type];
742 mcp = &mchr[(int)ship->shp_type];
744 if (((int)plane->pln_ship) == ((int)ship->shp_uid))
745 return 1; /* Already on ship */
747 /* Try to put on ship as a chopper plane */
748 if ((pcp->pl_flags & P_K) &&
749 (mcp->m_flags & M_CHOPPER) &&
750 (ship->shp_nchoppers < mcp->m_nchoppers)) {
752 ship->shp_nchoppers++;
753 plane->pln_x = ship->shp_x;
754 plane->pln_y = ship->shp_y;
755 plane->pln_ship = ship->shp_uid;
756 putship(ship->shp_uid, ship);
757 putplane(plane->pln_uid, plane);
761 /* Try to put on ship as an xlight plane */
762 if ((pcp->pl_flags & P_E) &&
763 (mcp->m_flags & M_XLIGHT) &&
764 (ship->shp_nxlight < mcp->m_nxlight)) {
767 plane->pln_x = ship->shp_x;
768 plane->pln_y = ship->shp_y;
769 plane->pln_ship = ship->shp_uid;
770 putship(ship->shp_uid, ship);
771 putplane(plane->pln_uid, plane);
775 /* Try to put on ship as a normal plane */
776 if ((((pcp->pl_flags & P_L) && (mcp->m_flags & M_FLY)) ||
777 ((pcp->pl_flags & P_M) && (pcp->pl_flags & P_L) &&
778 (mcp->m_flags & M_MSL))) &&
779 (ship->shp_nplane < mcp->m_nplanes)) {
782 plane->pln_x = ship->shp_x;
783 plane->pln_y = ship->shp_y;
784 plane->pln_ship = ship->shp_uid;
785 putship(ship->shp_uid, ship);
786 putplane(plane->pln_uid, plane);
795 take_plane_off_ship(struct plnstr *plane, struct shpstr *ship)
797 struct plchrstr *pcp;
800 pcp = &plchr[(int)plane->pln_type];
801 mcp = &mchr[(int)ship->shp_type];
803 /* Try to take off ship as a chopper plane */
804 if ((pcp->pl_flags & P_K) &&
805 (mcp->m_flags & M_CHOPPER) && (ship->shp_nchoppers)) {
807 ship->shp_nchoppers--;
808 plane->pln_ship = -1;
809 putship(ship->shp_uid, ship);
810 putplane(plane->pln_uid, plane);
814 /* Try to take off ship as an xlight plane */
815 if ((pcp->pl_flags & P_E) &&
816 (mcp->m_flags & M_XLIGHT) && (ship->shp_nxlight)) {
819 plane->pln_ship = -1;
820 putship(ship->shp_uid, ship);
821 putplane(plane->pln_uid, plane);
825 /* Try to take off ship as a normal plane */
826 if ((((pcp->pl_flags & P_L) && (mcp->m_flags & M_FLY)) ||
827 ((pcp->pl_flags & P_M) && (pcp->pl_flags & P_L) &&
828 (mcp->m_flags & M_MSL))) && (ship->shp_nplane)) {
831 plane->pln_ship = -1;
832 putship(ship->shp_uid, ship);
833 putplane(plane->pln_uid, plane);
842 take_plane_off_land(struct plnstr *plane, struct lndstr *land)
844 struct plchrstr *pcp;
847 pcp = &plchr[(int)plane->pln_type];
848 lcp = &lchr[(int)land->lnd_type];
850 /* Try to take off ship as an xlight plane */
851 if ((pcp->pl_flags & P_E) &&
852 (lcp->l_flags & L_XLIGHT) && (land->lnd_nxlight)) {
855 plane->pln_land = -1;
856 putland(land->lnd_uid, land);
857 putplane(plane->pln_uid, plane);
866 can_be_on_ship(int p, int s)
870 struct plchrstr *pcp;
876 pcp = &plchr[(int)plane.pln_type];
877 mcp = &mchr[(int)ship.shp_type];
879 if (pcp->pl_flags & P_L)
880 if (mcp->m_flags & M_FLY)
883 if (pcp->pl_flags & P_K)
884 if (mcp->m_flags & M_CHOPPER)
887 if (pcp->pl_flags & P_M)
888 if (mcp->m_flags & M_MSL)
891 if (pcp->pl_flags & P_E)
892 if (mcp->m_flags & M_XLIGHT)
899 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
902 struct plchrstr *pcp;
903 struct emp_qelem *qp;
904 struct emp_qelem *next;
910 getsect(x, y, §);
911 mines_there = sect.sct_mines;
913 if (mines_there == 0)
916 if ((sect.sct_type != SCT_WATER) && (sect.sct_type != SCT_HARBR))
919 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
922 ip = (struct plist *)qp;
925 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
928 if (chance(((double)(100 - pp->pln_acc)) / 100.0)) {
930 xyas(sect.sct_x, sect.sct_y, pp->pln_own));
936 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
937 writemap(player->cnum);
938 sect.sct_mines = mines_there;
943 count_planes(struct shpstr *sp)
947 struct plchrstr *pcp;
953 if (sp->shp_effic < SHIP_MINEFF)
956 mcp = &mchr[(int)sp->shp_type];
957 snxtitem_xy(&ni, EF_PLANE, sp->shp_x, sp->shp_y);
958 while (nxtitem(&ni, (s_char *)&plane)) {
959 if (plane.pln_own == 0)
961 if (plane.pln_ship == sp->shp_uid) {
962 pcp = &plchr[(int)plane.pln_type];
963 if ((pcp->pl_flags & P_K) && (nchoppers < mcp->m_nchoppers))
965 else if ((pcp->pl_flags & P_E) && (nxlight < mcp->m_nxlight))
967 else if ((pcp->pl_flags & P_L) || (pcp->pl_flags & P_M))
972 if (nplane != sp->shp_nplane ||
973 nxlight != sp->shp_nxlight || nchoppers != sp->shp_nchoppers) {
974 sp->shp_nplane = nplane;
975 sp->shp_nxlight = nxlight;
976 sp->shp_nchoppers = nchoppers;
977 putship(sp->shp_uid, sp);
982 count_land_planes(struct lndstr *lp)
988 if (lp->lnd_effic < LAND_MINEFF)
991 snxtitem_all(&ni, EF_PLANE);
992 while (nxtitem(&ni, (s_char *)&plane)) {
993 if (plane.pln_own == 0)
995 if (plane.pln_land == lp->lnd_uid)
999 if (lp->lnd_nxlight != nplane) {
1000 lp->lnd_nxlight = nplane;
1001 putland(lp->lnd_uid, lp);
1006 count_sect_planes(struct sctstr *sp)
1009 struct nstr_item ni;
1010 struct plnstr plane;
1012 snxtitem_all(&ni, EF_PLANE);
1013 while (nxtitem(&ni, (s_char *)&plane)) {
1016 if (plane.pln_flags & PLN_LAUNCHED)
1018 if (plane.pln_x == sp->sct_x && plane.pln_y == sp->sct_y)
1026 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
1028 struct plchrstr *pcp;
1029 struct lchrstr *lcp;
1031 pcp = &plchr[(int)plane->pln_type];
1032 lcp = &lchr[(int)land->lnd_type];
1034 if (((int)plane->pln_land) == ((int)land->lnd_uid))
1035 return 1; /* Already on unit */
1037 /* Try to put on unit as an xlight plane */
1038 if ((pcp->pl_flags & P_E) &&
1039 (lcp->l_flags & L_XLIGHT) &&
1040 (land->lnd_nxlight < lcp->l_nxlight)) {
1042 land->lnd_nxlight++;
1043 plane->pln_x = land->lnd_x;
1044 plane->pln_y = land->lnd_y;
1045 plane->pln_land = land->lnd_uid;
1046 putland(land->lnd_uid, land);
1047 putplane(plane->pln_uid, plane);
1051 /* We have failed */
1056 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
1058 struct plchrstr *pcp = plchr + pp->pln_type;
1059 float tfact = (float)(pp->pln_tech - pcp->pl_tech) /
1060 (pp->pln_tech - pcp->pl_tech / 2);
1061 int acc = pp->pln_acc;
1064 if (type == EF_SHIP) {
1065 if (pcp->pl_flags & P_A)
1067 if (!(pcp->pl_flags & P_T))
1070 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
1071 (1.0 - (float)acc / 100.0)) - hardtarget;
1073 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
1075 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
1076 if (hitchance > 100)
1081 /* return 0 if there was a nuclear detonation */
1084 pln_damage(struct plnstr *pp, coord x, coord y, s_char type, int *nukedamp,
1087 struct plchrstr *pcp = plchr + pp->pln_type;
1095 if (pp->pln_nuketype != (s_char)-1) {
1096 mpr(pp->pln_own, "Releasing RV's for %s detonation...\n",
1097 pp->pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
1098 *nukedamp = detonate(pp, x, y);
1103 if (!pp->pln_load) /* e.g. ab, blowing up on launch pad */
1106 i = roll(pp->pln_load) + 1;
1107 if (i > pp->pln_load)
1110 if (pcp->pl_flags & P_M) {
1111 if (pcp->pl_flags & P_MAR)
1113 } else if (pcp->pl_flags & P_T)
1116 aim = 100 - pp->pln_acc;
1130 hitroll = roll(100);
1131 if (hitroll >= 90) {
1134 mpr(pp->pln_own, "BLAM");
1135 } else if (hitroll < aim) {
1138 mpr(pp->pln_own, "Blam");
1142 mpr(pp->pln_own, "blam");
1145 mpr(pp->pln_own, "-");
1148 mpr(pp->pln_own, "\n");
1155 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1158 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1159 return (int)(100 - 100 * misschance * misschance);
1163 pln_mobcost(int dist, struct plnstr *pp, int flags)
1167 if ((flags & P_F) || (flags & P_ESC))
1168 cost = 10 * 100 / pp->pln_effic;
1170 cost = 20 * 100 / pp->pln_effic;
1172 cost = ldround((double)cost * dist / pp->pln_range_max, 1);
1174 return min(32 + pp->pln_mobil, cost + 5);