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,
213 struct emp_qelem *qp;
216 struct sctstr *sectp;
225 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
226 plp = (struct plist *)qp;
229 if (type == EF_SECTOR) {
231 if (sectp->sct_type == SCT_WATER && ip->i_vtype == V_SHELL) {
233 sectp->sct_mines = min(sectp->sct_mines + amt, MINES_MAX);
234 pr("%d mines laid in %s.\n", amt,
235 xyas(sectp->sct_x, sectp->sct_y, player->cnum));
237 && map_set(player->cnum, sectp->sct_x, sectp->sct_y, 'X', 0))
238 writemap(player->cnum);
242 there = sectp->sct_item[ip->i_vtype];
246 there = sp->shp_item[ip->i_vtype];
247 mp = &mchr[(int)sp->shp_type];
248 max = vl_find(ip->i_vtype, mp->m_vtype,
249 mp->m_vamt, (int)mp->m_nv);
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) {
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", sp->shp_uid);
274 putship(sp->shp_uid, sp);
279 pln_sel(struct nstr_item *ni, struct emp_qelem *list, struct sctstr *ap,
280 int ap_to_target, int rangemult, int wantflags, int nowantflags)
287 struct plchrstr *pcp;
290 register int bad, bad1;
294 while (nxtitem(ni, (s_char *)&plane)) {
297 if (plane.pln_mobil <= (s_char)0)
300 if (ontradingblock(EF_PLANE, (int *)&plane)) {
301 pr("plane #%d inelligible - it's for sale.\n",
307 range = mapdist(plane.pln_x, plane.pln_y, ap->sct_x, ap->sct_y);
309 pr("%s too far from assembly point\n", prplane(&plane));
312 if (plane.pln_effic < 40) {
313 pr("%s not efficient enough (must be 40%%)\n",
317 range += ap_to_target;
318 pcp = &plchr[(int)plane.pln_type];
322 for (x = 0; x < sizeof(wantflags) * 8; x++) {
324 if ((wantflags & y) == y)
325 if ((pcp->pl_flags & y) != y) {
344 if ((pcp->pl_flags & P_ESC) || (pcp->pl_flags & P_F))
348 if ((wantflags & P_L) && (pcp->pl_flags & P_L))
350 if ((wantflags & P_K) && (pcp->pl_flags & P_K))
352 if ((wantflags & P_E) && (pcp->pl_flags & P_E))
361 for (x = 0; x < sizeof(nowantflags) * 8; x++) {
363 if ((nowantflags & y) == y)
364 if ((pcp->pl_flags & y) == y)
371 if (plane.pln_range < range) {
372 pr("%s out of range (%d:%d)\n", prplane(&plane),
373 plane.pln_range, range);
376 if (plane.pln_ship >= 0) {
377 if (!getship(plane.pln_ship, &ship) ||
378 plane.pln_own != player->cnum) {
381 pr("(note) ship not valid for %s\n", prplane(&plane));
382 putplane(plane.pln_uid, &plane);
385 if (!can_be_on_ship(plane.pln_uid, ship.shp_uid))
387 if (ship.shp_effic < SHIP_MINEFF)
389 if (ship.shp_effic < 50)
391 /* Can't fly off non-owned ships or non-allied ship */
392 if ((ship.shp_own != player->cnum) &&
393 (getrel(getnatp(ship.shp_own), player->cnum) != ALLIED)) {
394 pr("(note) An ally does not own the ship %s is on\n",
399 if (plane.pln_land >= 0) {
400 if (!getland(plane.pln_land, &land) ||
401 (plane.pln_own != player->cnum)) {
404 pr("(note) land unit not valid for %s\n", prplane(&plane));
405 putplane(plane.pln_uid, &plane);
408 if (!(plchr[(int)plane.pln_type].pl_flags & P_E))
410 if (land.lnd_effic < LAND_MINEFF)
412 if (land.lnd_effic < 50)
414 /* Can't fly off units in ships or other units */
415 if ((land.lnd_ship >= 0) || (land.lnd_land >= 0))
417 /* Can't fly off non-owned units or non-allied unit */
418 if ((land.lnd_own != player->cnum) &&
419 (getrel(getnatp(land.lnd_own), player->cnum) != ALLIED)) {
420 pr("(note) An ally does not own the unit %s is on\n",
425 /* Now, check the sector status if not on a plane or unit */
426 if ((plane.pln_ship < 0) && (plane.pln_land < 0)) {
427 if (!getsect(plane.pln_x, plane.pln_y, §))
429 /* First, check allied status */
430 /* Can't fly from non-owned sectors or non-allied sectors */
431 if ((sect.sct_own != player->cnum) &&
432 (getrel(getnatp(sect.sct_own), player->cnum) != ALLIED)) {
433 pr("(note) An ally does not own the sector %s is in\n",
438 if ((pcp->pl_flags & P_V) == 0) {
439 if (sect.sct_type != SCT_AIRPT) {
440 pr("%s not at airport\n", prplane(&plane));
443 if (sect.sct_effic < 40) {
444 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));
447 if (rangemult == 2 && sect.sct_effic < 60) {
448 pr("%s is not 60%% efficient, %s can't land there.\n",
449 xyas(sect.sct_x, sect.sct_y, plane.pln_own),
455 pr("%s standing by\n", prplane(&plane));
456 plane.pln_mission = 0;
457 putplane(plane.pln_uid, &plane);
458 plp = (struct plist *)malloc(sizeof(struct plist));
464 emp_insque(&plp->queue, list);
469 pln_arm(struct emp_qelem *list, int dist, int mission, struct ichrstr *ip,
470 int flags, int mission_flags, int *tech)
472 struct emp_qelem *qp;
473 struct emp_qelem *next;
478 for (qp = list->q_forw; qp != list; qp = next) {
480 plp = (struct plist *)qp;
481 if (pln_equip(plp, ip, flags, mission) < 0) {
486 if (flags & (P_S | P_I)) {
487 if (plp->pcp->pl_flags & P_S)
488 mission_flags |= P_S;
489 if (plp->pcp->pl_flags & P_I)
490 mission_flags |= P_I;
492 if (*tech > plp->plane.pln_tech)
493 *tech = plp->plane.pln_tech;
494 if (!(plp->pcp->pl_flags & P_H))
495 /* no stealth on this mission */
496 mission_flags &= ~P_H;
497 if (!(plp->pcp->pl_flags & P_X))
498 /* no stealth on this mission */
499 mission_flags &= ~P_X;
500 if (!(plp->pcp->pl_flags & P_A)) {
501 /* no asw on this mission */
502 mission_flags &= ~P_A;
504 if (!(plp->pcp->pl_flags & P_MINE)) {
505 /* no asw on this mission */
506 mission_flags &= ~P_MINE;
508 plp->plane.pln_mobil -= pln_mobcost(dist, &plp->plane, flags);
509 pr("%s equipped\n", prplane(&plp->plane));
511 return mission_flags;
515 pln_equip(struct plist *plp, struct ichrstr *ip, int flags, s_char mission)
517 register struct plchrstr *pcp;
532 if (pp->pln_ship >= 0) {
533 getship(pp->pln_ship, &ship);
535 ptr = (s_char *)&ship;
537 } else if (pp->pln_land >= 0) {
538 getland(pp->pln_land, &land);
540 ptr = (s_char *)&land;
543 getsect(pp->pln_x, pp->pln_y, §);
545 ptr = (s_char *)§
546 own = sect.sct_oldown;
549 if (ip->i_vtype == V_CIVIL) {
550 if (pp->pln_own != own) {
551 pr("You don't control those civilians!\n");
556 getvec(VT_ITEM, vec, ptr, type);
557 if (pcp->pl_fuel > vec[I_PETROL]) {
558 pr("%s not enough petrol there!\n", prplane(pp));
561 vec[I_PETROL] -= pcp->pl_fuel;
563 if ((flags & P_F) == 0) {
569 if (pp->pln_nuketype == -1) {
571 needed = pp->pln_load;
575 if ((pcp->pl_flags & P_C) == 0 || ip == 0)
578 needed = (pp->pln_load * 2) / ip->i_lbs;
582 needed = (pp->pln_load * 2) / ip->i_lbs;
583 /* Is this mine dropping excursion? */
584 if (itype == I_SHELL && (pcp->pl_flags & P_MINE))
586 /* Is this a cargo drop? */
587 if ((pcp->pl_flags & P_C) == 0 || ip == 0) {
594 if ((pcp->pl_flags & (P_V | P_C)) == 0)
597 needed = pp->pln_load / ip->i_lbs;
600 if (pp->pln_nuketype == (s_char)-1)
606 if (rval < 0 || (itype && needed <= 0)) {
607 pr("%s can't contribute to mission\n", prplane(pp));
611 /* Supply is broken somewhere, so don't use it for now */
612 if (vec[itype] < needed && itype == I_SHELL)
613 vec[itype] += supply_commod(plp->plane.pln_own,
614 plp->plane.pln_x, plp->plane.pln_y,
617 if (vec[itype] < needed) {
618 pr("Not enough %s for %s\n", ichr[itype].i_name, prplane(pp));
621 vec[itype] -= needed;
623 if (itype == I_SHELL && (mission == 's' || mission == 'p'))
628 putvec(VT_ITEM, vec, ptr, type);
629 if (type == EF_SHIP) {
630 if (pp->pln_own != ship.shp_own) {
632 "%s %s prepares for takeoff from ship %s\n",
633 cname(pp->pln_own), prplane(pp), prship(&ship));
635 putship(ship.shp_uid, &ship);
636 } else if (type == EF_LAND) {
637 if (pp->pln_own != land.lnd_own) {
639 "%s %s prepares for takeoff from unit %s\n",
640 cname(pp->pln_own), prplane(pp), prland(&land));
642 putland(land.lnd_uid, &land);
644 if (pp->pln_own != sect.sct_own) {
645 wu(0, sect.sct_own, "%s %s prepares for takeoff from %s\n",
646 cname(pp->pln_own), prplane(pp), xyas(sect.sct_x,
656 pln_put(struct emp_qelem *list)
658 register struct emp_qelem *qp;
659 register struct emp_qelem *newqp;
665 /* Here is where planes return home from bombing runs.
666 We need to make sure they still have somewhere to return
670 plp = (struct plist *)qp;
672 /* Ok, check out where it wants to land */
673 if (pp->pln_ship >= 0) {
674 /* It is landing on a carrier */
675 getship(pp->pln_ship, &ship);
676 /* We should do more, like make sure it's really
677 a carrier, etc. but for now just make sure it's
679 if (ship.shp_effic < SHIP_MINEFF) {
681 "Ship #%d has been sunk, plane #%d has nowhere to land, and\nsplashes into the sea.\n",
682 pp->pln_ship, pp->pln_uid);
686 /* Presume we are landing back in a sector. */
687 getsect(pp->pln_x, pp->pln_y, §);
688 if (sect.sct_type == SCT_WATER || sect.sct_type == SCT_WASTE) {
690 "Nowwhere to land at %s, plane #%d crashes and burns...\n",
691 xyas(pp->pln_x, pp->pln_y, pp->pln_own), pp->pln_uid);
695 putplane(pp->pln_uid, pp);
704 pln_removedupes(struct emp_qelem *bomb_list, struct emp_qelem *esc_list)
706 struct emp_qelem *bomb;
707 struct emp_qelem *esc;
711 if (QEMPTY(bomb_list) || QEMPTY(esc_list))
713 bomb = bomb_list->q_forw;
714 while (bomb != bomb_list) {
715 if (QEMPTY(esc_list)) {
719 esc = esc_list->q_forw;
720 bombp = (struct plist *)bomb;
721 while (esc != esc_list) {
722 escp = (struct plist *)esc;
723 if (escp->plane.pln_uid == bombp->plane.pln_uid) {
735 put_plane_on_ship(struct plnstr *plane, struct shpstr *ship)
737 struct plchrstr *pcp;
740 pcp = &plchr[(int)plane->pln_type];
741 mcp = &mchr[(int)ship->shp_type];
743 if (((int)plane->pln_ship) == ((int)ship->shp_uid))
744 return 1; /* Already on ship */
746 /* Try to put on ship as a chopper plane */
747 if ((pcp->pl_flags & P_K) &&
748 (mcp->m_flags & M_CHOPPER) &&
749 (ship->shp_nchoppers < mcp->m_nchoppers)) {
751 ship->shp_nchoppers++;
752 plane->pln_x = ship->shp_x;
753 plane->pln_y = ship->shp_y;
754 plane->pln_ship = ship->shp_uid;
755 putship(ship->shp_uid, ship);
756 putplane(plane->pln_uid, plane);
760 /* Try to put on ship as an xlight plane */
761 if ((pcp->pl_flags & P_E) &&
762 (mcp->m_flags & M_XLIGHT) &&
763 (ship->shp_nxlight < mcp->m_nxlight)) {
766 plane->pln_x = ship->shp_x;
767 plane->pln_y = ship->shp_y;
768 plane->pln_ship = ship->shp_uid;
769 putship(ship->shp_uid, ship);
770 putplane(plane->pln_uid, plane);
774 /* Try to put on ship as a normal plane */
775 if ((((pcp->pl_flags & P_L) && (mcp->m_flags & M_FLY)) ||
776 ((pcp->pl_flags & P_M) && (pcp->pl_flags & P_L) &&
777 (mcp->m_flags & M_MSL))) &&
778 (ship->shp_nplane < mcp->m_nplanes)) {
781 plane->pln_x = ship->shp_x;
782 plane->pln_y = ship->shp_y;
783 plane->pln_ship = ship->shp_uid;
784 putship(ship->shp_uid, ship);
785 putplane(plane->pln_uid, plane);
794 take_plane_off_ship(struct plnstr *plane, struct shpstr *ship)
796 struct plchrstr *pcp;
799 pcp = &plchr[(int)plane->pln_type];
800 mcp = &mchr[(int)ship->shp_type];
802 /* Try to take off ship as a chopper plane */
803 if ((pcp->pl_flags & P_K) &&
804 (mcp->m_flags & M_CHOPPER) && (ship->shp_nchoppers)) {
806 ship->shp_nchoppers--;
807 plane->pln_ship = -1;
808 putship(ship->shp_uid, ship);
809 putplane(plane->pln_uid, plane);
813 /* Try to take off ship as an xlight plane */
814 if ((pcp->pl_flags & P_E) &&
815 (mcp->m_flags & M_XLIGHT) && (ship->shp_nxlight)) {
818 plane->pln_ship = -1;
819 putship(ship->shp_uid, ship);
820 putplane(plane->pln_uid, plane);
824 /* Try to take off ship as a normal plane */
825 if ((((pcp->pl_flags & P_L) && (mcp->m_flags & M_FLY)) ||
826 ((pcp->pl_flags & P_M) && (pcp->pl_flags & P_L) &&
827 (mcp->m_flags & M_MSL))) && (ship->shp_nplane)) {
830 plane->pln_ship = -1;
831 putship(ship->shp_uid, ship);
832 putplane(plane->pln_uid, plane);
841 take_plane_off_land(struct plnstr *plane, struct lndstr *land)
843 struct plchrstr *pcp;
846 pcp = &plchr[(int)plane->pln_type];
847 lcp = &lchr[(int)land->lnd_type];
849 /* Try to take off ship as an xlight plane */
850 if ((pcp->pl_flags & P_E) &&
851 (lcp->l_flags & L_XLIGHT) && (land->lnd_nxlight)) {
854 plane->pln_land = -1;
855 putland(land->lnd_uid, land);
856 putplane(plane->pln_uid, plane);
865 can_be_on_ship(int p, int s)
869 struct plchrstr *pcp;
875 pcp = &plchr[(int)plane.pln_type];
876 mcp = &mchr[(int)ship.shp_type];
878 if (pcp->pl_flags & P_L)
879 if (mcp->m_flags & M_FLY)
882 if (pcp->pl_flags & P_K)
883 if (mcp->m_flags & M_CHOPPER)
886 if (pcp->pl_flags & P_M)
887 if (mcp->m_flags & M_MSL)
890 if (pcp->pl_flags & P_E)
891 if (mcp->m_flags & M_XLIGHT)
898 plane_sweep(struct emp_qelem *plane_list, coord x, coord y)
901 struct plchrstr *pcp;
902 struct emp_qelem *qp;
903 struct emp_qelem *next;
909 getsect(x, y, §);
910 mines_there = sect.sct_mines;
912 if (mines_there == 0)
915 if ((sect.sct_type != SCT_WATER) && (sect.sct_type != SCT_HARBR))
918 for (qp = plane_list->q_forw; ((qp != plane_list) && (mines_there));
921 ip = (struct plist *)qp;
924 if (!(pcp->pl_flags & P_SWEEP)) /* if it isn't an sweep plane */
927 if (chance(((double)(100 - pp->pln_acc)) / 100.0)) {
929 xyas(sect.sct_x, sect.sct_y, pp->pln_own));
935 if (found && map_set(player->cnum, sect.sct_x, sect.sct_y, 'X', 0))
936 writemap(player->cnum);
937 sect.sct_mines = mines_there;
942 count_planes(struct shpstr *sp)
946 struct plchrstr *pcp;
952 if (sp->shp_effic < SHIP_MINEFF)
955 mcp = &mchr[(int)sp->shp_type];
956 snxtitem_xy(&ni, EF_PLANE, sp->shp_x, sp->shp_y);
957 while (nxtitem(&ni, (s_char *)&plane)) {
958 if (plane.pln_own == 0)
960 if (plane.pln_ship == sp->shp_uid) {
961 pcp = &plchr[(int)plane.pln_type];
962 if ((pcp->pl_flags & P_K) && (nchoppers < mcp->m_nchoppers))
964 else if ((pcp->pl_flags & P_E) && (nxlight < mcp->m_nxlight))
966 else if ((pcp->pl_flags & P_L) || (pcp->pl_flags & P_M))
971 if (nplane != sp->shp_nplane ||
972 nxlight != sp->shp_nxlight || nchoppers != sp->shp_nchoppers) {
973 sp->shp_nplane = nplane;
974 sp->shp_nxlight = nxlight;
975 sp->shp_nchoppers = nchoppers;
976 putship(sp->shp_uid, sp);
981 count_land_planes(struct lndstr *lp)
987 if (lp->lnd_effic < LAND_MINEFF)
990 snxtitem_all(&ni, EF_PLANE);
991 while (nxtitem(&ni, (s_char *)&plane)) {
992 if (plane.pln_own == 0)
994 if (plane.pln_land == lp->lnd_uid)
998 if (lp->lnd_nxlight != nplane) {
999 lp->lnd_nxlight = nplane;
1000 putland(lp->lnd_uid, lp);
1005 count_sect_planes(struct sctstr *sp)
1008 struct nstr_item ni;
1009 struct plnstr plane;
1011 snxtitem_all(&ni, EF_PLANE);
1012 while (nxtitem(&ni, (s_char *)&plane)) {
1015 if (plane.pln_flags & PLN_LAUNCHED)
1017 if (plane.pln_x == sp->sct_x && plane.pln_y == sp->sct_y)
1025 put_plane_on_land(struct plnstr *plane, struct lndstr *land)
1027 struct plchrstr *pcp;
1028 struct lchrstr *lcp;
1030 pcp = &plchr[(int)plane->pln_type];
1031 lcp = &lchr[(int)land->lnd_type];
1033 if (((int)plane->pln_land) == ((int)land->lnd_uid))
1034 return 1; /* Already on unit */
1036 /* Try to put on unit as an xlight plane */
1037 if ((pcp->pl_flags & P_E) &&
1038 (lcp->l_flags & L_XLIGHT) &&
1039 (land->lnd_nxlight < lcp->l_nxlight)) {
1041 land->lnd_nxlight++;
1042 plane->pln_x = land->lnd_x;
1043 plane->pln_y = land->lnd_y;
1044 plane->pln_land = land->lnd_uid;
1045 putland(land->lnd_uid, land);
1046 putplane(plane->pln_uid, plane);
1050 /* We have failed */
1055 pln_hitchance(struct plnstr *pp, int hardtarget, int type)
1057 struct plchrstr *pcp = plchr + pp->pln_type;
1058 float tfact = (float)(pp->pln_tech - pcp->pl_tech) /
1059 (pp->pln_tech - pcp->pl_tech / 2);
1060 int acc = pp->pln_acc;
1063 if (type == EF_SHIP) {
1064 if (pcp->pl_flags & P_A)
1066 if (!(pcp->pl_flags & P_T))
1069 hitchance = (int)(pp->pln_effic * (1.0 - 0.1 * tfact) *
1070 (1.0 - (float)acc / 100.0)) - hardtarget;
1072 /* smooth out the bottom of the graph with asymtote at 5 -KHS */
1074 hitchance = 5 + ldround(300.0 / (40.0 - hitchance), 1);
1075 if (hitchance > 100)
1080 /* return 0 if there was a nuclear detonation */
1083 pln_damage(struct plnstr *pp, coord x, coord y, s_char type, int *nukedamp,
1086 struct plchrstr *pcp = plchr + pp->pln_type;
1094 if (pp->pln_nuketype != (s_char)-1) {
1095 mpr(pp->pln_own, "Releasing RV's for %s detonation...\n",
1096 pp->pln_flags & PLN_AIRBURST ? "airburst" : "groundburst");
1097 *nukedamp = detonate(pp, x, y);
1102 if (!pp->pln_load) /* e.g. ab, blowing up on launch pad */
1105 i = roll(pp->pln_load) + 1;
1106 if (i > pp->pln_load)
1109 if (pcp->pl_flags & P_M) {
1110 if (pcp->pl_flags & P_MAR)
1112 } else if (pcp->pl_flags & P_T)
1115 aim = 100 - pp->pln_acc;
1129 hitroll = roll(100);
1130 if (hitroll >= 90) {
1133 mpr(pp->pln_own, "BLAM");
1134 } else if (hitroll < aim) {
1137 mpr(pp->pln_own, "Blam");
1141 mpr(pp->pln_own, "blam");
1144 mpr(pp->pln_own, "-");
1147 mpr(pp->pln_own, "\n");
1154 pln_identchance(struct plnstr *pp, int hardtarget, int type)
1157 (100.0 - pln_hitchance(pp, hardtarget, type)) / 100.0;
1158 return (int)(100 - 100 * misschance * misschance);
1162 pln_mobcost(int dist, struct plnstr *pp, int flags)
1166 if ((flags & P_F) || (flags & P_ESC))
1167 cost = 10 * 100 / pp->pln_effic;
1169 cost = 20 * 100 / pp->pln_effic;
1171 cost = ldround((double)cost * dist / pp->pln_range_max, 1);
1173 return min(32 + pp->pln_mobil, cost + 5);