2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2005, 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 * mslsub.c: Missile subroutine stuff
30 * Known contributors to this file:
32 * Steve McClure, 1996-2000
50 #include "prototypes.h"
53 msl_equip(struct plnstr *pp)
57 memset(&pl, 0, sizeof(struct plist));
58 pl.pcp = plchr + pp->pln_type;
60 return mission_pln_equip(&pl, 0, 0, 'p');
64 msl_hit(struct plnstr *pp, int hardtarget, int type, int news_item,
65 int snews_item, s_char *what, coord x, coord y, int victim)
71 struct plchrstr *pcp = plchr + pp->pln_type;
72 int hitchance = pln_hitchance(pp, hardtarget, type);
76 mpr(pp->pln_own, "Preparing to launch %s at %s %s %s%s\n",
80 (type == EF_SHIP || type == EF_PLANE) ? "in " : "",
81 xyas(x, y, pp->pln_own));
82 mpr(pp->pln_own, "\tLaunching from ");
83 if (pp->pln_ship >= 0) {
84 getship(pp->pln_ship, &ship);
85 mpr(pp->pln_own, "%s in ", prship(&ship));
86 if (mchr[(int)ship.shp_type].m_flags & M_SUB) {
91 mpr(pp->pln_own, "%s\n",
92 xyas(ship.shp_x, ship.shp_y, pp->pln_own));
94 if (pp->pln_harden > 0) {
95 mpr(pp->pln_own, "missile silo at ");
98 from = "on launch pad";
99 mpr(pp->pln_own, "%s\n", xyas(pp->pln_x, pp->pln_y, pp->pln_own));
102 if (chance((0.05 + (100 - pp->pln_effic) / 100.0)
103 * (1 - techfact(pp->pln_tech, 1.0)))) {
104 mpr(pp->pln_own, "KABOOOOM! Missile explodes %s!\n", from);
106 dam = pln_damage(pp, pp->pln_x, pp->pln_y,
107 'p', &dummyi, 1) / 2;
109 if (pp->pln_ship >= 0) {
110 shipdamage(&ship, dam);
111 putship(ship.shp_uid, &ship);
113 pr("Explosion damages %s %d%%",
114 xyas(pp->pln_x, pp->pln_y, pp->pln_own), dam);
115 getsect(pp->pln_x, pp->pln_y, §);
116 sectdamage(§, dam, 0);
124 mpr(pp->pln_own, "\tSHWOOOOOSH! Missile launched!\n");
126 if (pp->pln_nuketype != -1)
127 mpr(pp->pln_own, "\tArming nuclear warheads...\n");
129 if (pcp->pl_flags & P_T)
130 mpr(victim, "Incoming %s missile sighted at %s...\n",
131 sublaunch ? "sub-launched" : cname(pp->pln_own),
134 if (opt_PINPOINTMISSILE == 0 ||
135 (pcp->pl_flags & P_T && !(pcp->pl_flags & P_MAR))) {
136 if (msl_intercept(x, y, pp->pln_own, pcp->pl_def,
137 sublaunch, P_N, P_O)) {
141 if (pcp->pl_flags & P_MAR) {
142 if (shp_missile_defense(x, y, pp->pln_own, pcp->pl_def)) {
147 if (pp->pln_nuketype != -1)
150 mpr(pp->pln_own, "\t%d%% hitchance...", hitchance);
151 hit = (roll(100) <= hitchance);
153 mpr(pp->pln_own, hit ? "HIT!\n" : "miss\n");
154 if (pcp->pl_flags & P_T)
155 mpr(victim, "...Incoming %s missile %s\n",
156 sublaunch ? (s_char *)"" : cname(pp->pln_own),
157 hit ? "HIT!\n" : "missed\n");
158 if (hit && news_item) {
160 nreport(victim, snews_item, 0, 1);
162 nreport(pp->pln_own, news_item, victim, 1);
168 msl_sel(struct emp_qelem *list, coord x, coord y, natid victim,
169 int wantflags, int nowantflags, int mission)
171 struct plchrstr *pcp;
177 snxtitem_all(&ni, EF_PLANE);
178 while (nxtitem(&ni, &plane)) {
182 pcp = &plchr[(int)plane.pln_type];
183 if (!(pcp->pl_flags & P_M))
185 if (wantflags && (pcp->pl_flags & wantflags) != wantflags)
187 if (nowantflags && pcp->pl_flags & nowantflags)
189 if (mission && plane.pln_mission != mission)
191 if (getrel(getnatp(plane.pln_own), victim) >= NEUTRAL)
193 /* missiles go one way, so we can use all the range */
194 if (plane.pln_range < mapdist(x, y, plane.pln_x, plane.pln_y))
196 if (plane.pln_mobil <= 0)
198 if (plane.pln_effic < 100)
200 /* got a valid interceptor */
201 irv = malloc(sizeof(*irv));
205 irv->pcp = &plchr[(int)plane.pln_type];
207 emp_insque(&irv->queue, list);
212 msl_intercept(coord x, coord y, natid bombown, int hardtarget,
213 int sublaunch, int wantflags, int nowantflags)
216 struct plchrstr *pcp;
218 struct emp_qelem *irvlist;
219 struct emp_qelem foo;
220 struct emp_qelem *intlist;
221 struct emp_qelem intfoo;
222 struct emp_qelem *qp;
223 struct emp_qelem *next;
230 s_char *who = sublaunch ? (s_char *)"" : cname(bombown);
232 getsect(x, y, §);
233 if (wantflags == P_O && !nowantflags) {
234 att_name = "satellite";
235 def_name = "a-sat missile";
236 news_item = N_SAT_KILL;
238 mpr(sect.sct_own, "%s has positioned a satellite over %s\n",
239 sublaunch ? (s_char *)"someone" : cname(bombown), xyas(x,
244 } else if (wantflags == P_N && nowantflags == P_O) {
245 att_name = "warhead";
247 news_item = sublaunch ? N_NUKE_SSTOP : N_NUKE_STOP;
249 att_name = "elephant";
250 def_name = "tomato"; /* heh -KHS */
251 news_item = N_NUKE_STOP;
255 /* get all hostile abms in range */
256 msl_sel(irvlist, x, y, bombown, wantflags, nowantflags, 0);
258 emp_initque(intlist);
259 /* First choose interceptors belonging to the target sector */
260 /* only allow two defense missiles per missile attack */
261 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
263 ip = (struct plist *)qp;
265 if (pp->pln_own != sect.sct_own)
268 if (mission_pln_equip(ip, 0, 0, 'i') < 0) {
273 /* got one interceptor, delete from irv_list and
277 emp_insque(qp, intlist);
278 putplane(pp->pln_uid, pp);
281 /* only allow two defense missiles per missile attack */
282 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
284 ip = (struct plist *)qp;
287 if (mission_pln_equip(ip, 0, 0, 'i') < 0) {
292 /* got one interceptor, delete from irv_list and
296 emp_insque(qp, intlist);
297 putplane(pp->pln_uid, pp);
300 /* Now, clean out the queue */
301 while (!QEMPTY(irvlist)) {
302 qp = irvlist->q_forw;
307 if (sect.sct_own != 0)
308 mpr(sect.sct_own, "No %ss launched to intercept.\n", def_name);
312 /* attempt to destroy incoming missile */
314 while (!QEMPTY(intlist)) {
315 qp = intlist->q_forw;
316 ip = (struct plist *)qp;
320 mpr(bombown, "%s %s launched in defense!\n",
321 cname(pp->pln_own), def_name);
322 if (sect.sct_own == pp->pln_own) {
323 mpr(sect.sct_own, "%s launched to intercept %s %s!\n",
324 def_name, who, att_name);
328 "%s launched an %s to intercept the %s %s!\n",
329 cname(pp->pln_own), def_name, who, att_name);
331 "%s launched to intercept %s %s arcing towards %s territory!\n",
332 def_name, who, att_name, cname(sect.sct_own));
336 msl_hit(pp, hardtarget, EF_PLANE, news_item, news_item,
337 att_name, x, y, bombown)) {
338 mpr(bombown, "%s destroyed by %s %s!\n", att_name,
339 cname(pp->pln_own), def_name);
341 mpr(sect.sct_own, "%s %s intercepted!\n", who, att_name);
342 if (sect.sct_own != pp->pln_own)
343 mpr(pp->pln_own, "%s %s intercepted!\n", who, att_name);
346 /* zap the missile */
347 makelost(EF_PLANE, pp->pln_own, pp->pln_uid, pp->pln_x, pp->pln_y);
349 putplane(pp->pln_uid, pp);
355 /* Clean out what is left in the list */
356 while (!QEMPTY(intlist)) {
357 qp = intlist->q_forw;
364 mpr(bombown, "%s made it through %s defenses!\n", att_name,
367 mpr(sect.sct_own, "%s made it through %s defenses!\n",
373 /* Keep launching missiles on list until mindam damage has been done */
375 msl_launch_mindam(struct emp_qelem *list, coord x, coord y, int hardtarget,
376 int type, int mindam, s_char *whatp, int victim,
379 struct emp_qelem *qp;
380 struct emp_qelem *next;
387 if (type == EF_SHIP) {
388 news_item = N_SHP_MISS;
389 snews_item = N_SHP_SMISS;
390 } else if (type == EF_LAND) {
391 news_item = N_LND_MISS;
392 snews_item = N_LND_SMISS;
394 news_item = N_SCT_MISS;
395 snews_item = N_SCT_SMISS;
398 for (qp = list->q_back; qp != list && dam < mindam && !nukedam;
401 plp = (struct plist *)qp;
403 if (mission_pln_equip(plp, 0, 0, 'p') >= 0) {
404 if (msl_hit(&plp->plane,
405 hardtarget, type, news_item, snews_item,
406 whatp, x, y, victim)) {
407 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
409 if (mission == MI_INTERDICT && type == EF_SECTOR)
414 /* Missiles that miss have to hit somewhere! */
415 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
416 collateral_damage(x, y, newdam, 0);
418 makelost(EF_PLANE, plp->plane.pln_own, plp->plane.pln_uid,
419 plp->plane.pln_x, plp->plane.pln_y);
420 plp->plane.pln_own = 0;
421 putplane(plp->plane.pln_uid, &plp->plane);