2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2004, 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 if (pp->pln_nuketype != (s_char)-1 && opt_NUKEFAILDETONATE) {
107 pp->pln_flags &= ~PLN_AIRBURST;
108 detonate(pp, pp->pln_x, pp->pln_y);
110 dam = pln_damage(pp, pp->pln_x, pp->pln_y,
111 'p', &dummyi, 1) / 2;
113 if (pp->pln_ship >= 0) {
114 shipdamage(&ship, dam);
115 putship(ship.shp_uid, &ship);
117 pr("Explosion damages %s %d%%",
118 xyas(pp->pln_x, pp->pln_y, pp->pln_own), dam);
119 getsect(pp->pln_x, pp->pln_y, §);
120 sectdamage(§, dam, 0);
129 mpr(pp->pln_own, "\tSHWOOOOOSH! Missile launched!\n");
131 if (pp->pln_nuketype != (s_char)-1)
132 mpr(pp->pln_own, "\tArming nuclear warheads...\n");
134 if (pcp->pl_flags & P_T)
135 mpr(victim, "Incoming %s missile sighted at %s...\n",
136 sublaunch ? "sub-launched" : cname(pp->pln_own),
139 if (opt_PINPOINTMISSILE == 0 ||
140 (pcp->pl_flags & P_T && !(pcp->pl_flags & P_MAR))) {
141 if (msl_intercept(x, y, pp->pln_own, pcp->pl_def,
142 sublaunch, P_N, P_O)) {
146 if (pcp->pl_flags & P_MAR) {
147 if (shp_missile_defense(x, y, pp->pln_own, pcp->pl_def)) {
152 if (pp->pln_nuketype != (s_char)-1)
155 mpr(pp->pln_own, "\t%d%% hitchance...", hitchance);
156 hit = (roll(100) <= hitchance);
158 mpr(pp->pln_own, hit ? "HIT!\n" : "miss\n");
159 if (pcp->pl_flags & P_T)
160 mpr(victim, "...Incoming %s missile %s\n",
161 sublaunch ? (s_char *)"" : cname(pp->pln_own),
162 hit ? "HIT!\n" : "missed\n");
163 if (hit && news_item) {
165 nreport(victim, snews_item, 0, 1);
167 nreport(pp->pln_own, news_item, victim, 1);
173 msl_sel(struct emp_qelem *list, coord x, coord y, natid victim,
174 int wantflags, int nowantflags, int mission)
176 struct plchrstr *pcp;
182 snxtitem_all(&ni, EF_PLANE);
183 while (nxtitem(&ni, (s_char *)&plane)) {
187 pcp = &plchr[(int)plane.pln_type];
188 if (!(pcp->pl_flags & P_M))
190 if (wantflags && (pcp->pl_flags & wantflags) != wantflags)
192 if (nowantflags && pcp->pl_flags & nowantflags)
194 if (mission && plane.pln_mission != mission)
196 if (getrel(getnatp(plane.pln_own), victim) >= NEUTRAL)
198 /* missiles go one way, so we can use all the range */
199 if (plane.pln_range < mapdist(x, y, plane.pln_x, plane.pln_y))
201 if (plane.pln_mobil <= (s_char)0)
203 if (plane.pln_effic < 100)
205 /* got a valid interceptor */
206 irv = (struct plist *)malloc(sizeof(*irv));
210 irv->pcp = &plchr[(int)plane.pln_type];
212 emp_insque(&irv->queue, list);
217 msl_intercept(coord x, coord y, natid bombown, int hardtarget,
218 int sublaunch, int wantflags, int nowantflags)
221 struct plchrstr *pcp;
223 struct emp_qelem *irvlist;
224 struct emp_qelem foo;
225 struct emp_qelem *intlist;
226 struct emp_qelem intfoo;
227 struct emp_qelem *qp;
228 struct emp_qelem *next;
235 s_char *who = sublaunch ? (s_char *)"" : cname(bombown);
237 getsect(x, y, §);
238 if (wantflags == P_O && !nowantflags) {
239 att_name = "satellite";
240 def_name = "a-sat missile";
241 news_item = N_SAT_KILL;
243 mpr(sect.sct_own, "%s has positioned a satellite over %s\n",
244 sublaunch ? (s_char *)"someone" : cname(bombown), xyas(x,
249 } else if (wantflags == P_N && nowantflags == P_O) {
250 att_name = "warhead";
252 news_item = sublaunch ? N_NUKE_SSTOP : N_NUKE_STOP;
254 att_name = "elephant";
255 def_name = "tomato"; /* heh -KHS */
256 news_item = N_NUKE_STOP;
260 /* get all hostile abms in range */
261 msl_sel(irvlist, x, y, bombown, wantflags, nowantflags, 0);
263 emp_initque(intlist);
264 /* First choose interceptors belonging to the target sector */
265 /* only allow two defense missiles per missile attack */
266 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
268 ip = (struct plist *)qp;
270 if (pp->pln_own != sect.sct_own)
273 if (mission_pln_equip(ip, 0, 0, 'i') < 0) {
278 /* got one interceptor, delete from irv_list and
282 emp_insque(qp, intlist);
283 putplane(pp->pln_uid, pp);
286 /* only allow two defense missiles per missile attack */
287 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
289 ip = (struct plist *)qp;
292 if (mission_pln_equip(ip, 0, 0, 'i') < 0) {
297 /* got one interceptor, delete from irv_list and
301 emp_insque(qp, intlist);
302 putplane(pp->pln_uid, pp);
305 /* Now, clean out the queue */
306 while (!QEMPTY(irvlist)) {
307 qp = irvlist->q_forw;
312 if (sect.sct_own != 0)
313 mpr(sect.sct_own, "No %ss launched to intercept.\n", def_name);
317 /* attempt to destroy incoming missile */
319 while (!QEMPTY(intlist)) {
320 qp = intlist->q_forw;
321 ip = (struct plist *)qp;
325 mpr(bombown, "%s %s launched in defense!\n",
326 cname(pp->pln_own), def_name);
327 if (sect.sct_own == pp->pln_own) {
328 mpr(sect.sct_own, "%s launched to intercept %s %s!\n",
329 def_name, who, att_name);
333 "%s launched an %s to intercept the %s %s!\n",
334 cname(pp->pln_own), def_name, who, att_name);
336 "%s launched to intercept %s %s arcing towards %s territory!\n",
337 def_name, who, att_name, cname(sect.sct_own));
341 msl_hit(pp, hardtarget, EF_PLANE, news_item, news_item,
342 att_name, x, y, bombown)) {
343 mpr(bombown, "%s destroyed by %s %s!\n", att_name,
344 cname(pp->pln_own), def_name);
346 mpr(sect.sct_own, "%s %s intercepted!\n", who, att_name);
347 if (sect.sct_own != pp->pln_own)
348 mpr(pp->pln_own, "%s %s intercepted!\n", who, att_name);
351 /* zap the missile */
352 makelost(EF_PLANE, pp->pln_own, pp->pln_uid, pp->pln_x, pp->pln_y);
354 putplane(pp->pln_uid, pp);
360 /* Clean out what is left in the list */
361 while (!QEMPTY(intlist)) {
362 qp = intlist->q_forw;
369 mpr(bombown, "%s made it through %s defenses!\n", att_name,
372 mpr(sect.sct_own, "%s made it through %s defenses!\n",
378 /* Keep launching missiles on list until mindam damage has been done */
380 msl_launch_mindam(struct emp_qelem *list, coord x, coord y, int hardtarget,
381 int type, int mindam, s_char *whatp, int victim,
384 struct emp_qelem *qp;
385 struct emp_qelem *next;
392 if (type == EF_SHIP) {
393 news_item = N_SHP_MISS;
394 snews_item = N_SHP_SMISS;
395 } else if (type == EF_LAND) {
396 news_item = N_LND_MISS;
397 snews_item = N_LND_SMISS;
399 news_item = N_SCT_MISS;
400 snews_item = N_SCT_SMISS;
403 for (qp = list->q_back; qp != list && dam < mindam && !nukedam;
406 plp = (struct plist *)qp;
408 if (mission_pln_equip(plp, 0, 0, 'p') >= 0) {
409 if (msl_hit(&plp->plane,
410 hardtarget, type, news_item, snews_item,
411 whatp, x, y, victim)) {
412 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
414 if (mission == MI_INTERDICT && type == EF_SECTOR)
419 /* Missiles that miss have to hit somewhere! */
420 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
421 collateral_damage(x, y, newdam, 0);
423 makelost(EF_PLANE, plp->plane.pln_own, plp->plane.pln_uid,
424 plp->plane.pln_x, plp->plane.pln_y);
425 plp->plane.pln_own = 0;
426 putplane(plp->plane.pln_uid, &plp->plane);