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 * mslsub.c: Missile subroutine stuff
30 * Known contributors to this file:
32 * Steve McClure, 1996-2000
50 #include "prototypes.h"
57 msl_equip(struct plnstr *pp, char mission)
61 memset(&pl, 0, sizeof(struct plist));
62 pl.pcp = plchr + pp->pln_type;
64 return pln_equip(&pl, NULL, mission);
68 msl_hit(struct plnstr *pp, int hardtarget, int type, int news_item,
69 int snews_item, char *what, coord x, coord y, int victim)
75 struct plchrstr *pcp = plchr + pp->pln_type;
80 mpr(pp->pln_own, "Preparing to launch %s at %s %s %s%s\n",
84 (type == EF_SHIP || type == EF_PLANE) ? "in " : "",
85 xyas(x, y, pp->pln_own));
86 mpr(pp->pln_own, "\tLaunching from ");
87 if (pp->pln_ship >= 0) {
88 getship(pp->pln_ship, &ship);
89 mpr(pp->pln_own, "%s in ", prship(&ship));
90 if (mchr[(int)ship.shp_type].m_flags & M_SUB) {
95 mpr(pp->pln_own, "%s\n",
96 xyas(ship.shp_x, ship.shp_y, pp->pln_own));
98 if (pp->pln_harden > 0) {
99 mpr(pp->pln_own, "missile silo at ");
102 from = "on launch pad";
103 mpr(pp->pln_own, "%s\n", xyas(pp->pln_x, pp->pln_y, pp->pln_own));
106 if (chance((0.05 + (100 - pp->pln_effic) / 100.0)
107 * (1 - techfact(pp->pln_tech, 1.0)))) {
108 mpr(pp->pln_own, "KABOOOOM! Missile explodes %s!\n", from);
110 dam = pln_damage(pp, 'p', 1) / 2;
111 if (pp->pln_ship >= 0) {
112 shipdamage(&ship, dam);
113 putship(ship.shp_uid, &ship);
115 pr("Explosion damages %s %d%%",
116 xyas(pp->pln_x, pp->pln_y, pp->pln_own), dam);
117 getsect(pp->pln_x, pp->pln_y, §);
118 sectdamage(§, dam);
125 CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED);
126 pp->pln_flags |= PLN_LAUNCHED;
127 putplane(pp->pln_uid, pp);
128 mpr(pp->pln_own, "\tSHWOOOOOSH! Missile launched!\n");
130 if (pcp->pl_flags & P_T)
131 mpr(victim, "Incoming %s missile sighted at %s...\n",
132 sublaunch ? "sub-launched" : cname(pp->pln_own),
135 if ((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 (nuk_on_plane(pp) >= 0) {
148 mpr(pp->pln_own, "\tArming nuclear warheads...\n");
151 hitchance = pln_hitchance(pp, hardtarget, type);
152 hit = (roll(100) <= hitchance);
153 mpr(pp->pln_own, "\t%d%% hitchance...%s\n", hitchance,
154 hit ? "HIT!" : "miss");
157 if (pcp->pl_flags & P_T)
158 mpr(victim, "...Incoming %s missile %s\n",
159 sublaunch ? "" : cname(pp->pln_own),
160 hit ? "HIT!\n" : "missed\n");
161 if (hit && news_item) {
163 nreport(victim, snews_item, 0, 1);
165 nreport(pp->pln_own, news_item, victim, 1);
171 msl_sel(struct emp_qelem *list, coord x, coord y, natid victim,
172 int wantflags, int nowantflags, int mission)
174 struct plchrstr *pcp;
180 snxtitem_all(&ni, EF_PLANE);
181 while (nxtitem(&ni, &plane)) {
185 pcp = &plchr[(int)plane.pln_type];
186 if (!(pcp->pl_flags & P_M))
188 if (wantflags && (pcp->pl_flags & wantflags) != wantflags)
190 if (nowantflags && pcp->pl_flags & nowantflags)
192 if (mission && plane.pln_mission != mission)
195 plane.pln_radius < mapdist(x, y, plane.pln_opx, plane.pln_opy))
197 if (getrel(getnatp(plane.pln_own), victim) >= NEUTRAL)
199 /* missiles go one way, so we can use all the range */
200 if (plane.pln_range < mapdist(x, y, plane.pln_x, plane.pln_y))
202 if (plane.pln_mobil <= 0)
204 if (plane.pln_effic < 100)
206 if (!pln_airbase_ok(&plane, 1, 0))
208 /* got a valid interceptor */
209 irv = malloc(sizeof(*irv));
211 irv->pcp = &plchr[(int)plane.pln_type];
213 emp_insque(&irv->queue, list);
218 msl_intercept(coord x, coord y, natid bombown, int hardtarget,
219 int sublaunch, int wantflags, int nowantflags)
222 struct plchrstr *pcp;
224 struct emp_qelem *irvlist;
225 struct emp_qelem foo;
226 struct emp_qelem *intlist;
227 struct emp_qelem intfoo;
228 struct emp_qelem *qp;
229 struct emp_qelem *next;
236 char *who = sublaunch ? "" : cname(bombown);
238 getsect(x, y, §);
239 if (wantflags == P_O && !nowantflags) {
240 att_name = "satellite";
241 def_name = "a-sat missile";
242 news_item = N_SAT_KILL;
243 mpr(sect.sct_own, "%s has positioned a satellite over %s\n",
244 sublaunch ? "someone" : cname(bombown),
245 xyas(x, y, sect.sct_own));
246 } else if (wantflags == P_N && nowantflags == P_O) {
247 att_name = "warhead";
249 news_item = sublaunch ? N_NUKE_SSTOP : N_NUKE_STOP;
251 att_name = "elephant";
252 def_name = "tomato"; /* heh -KHS */
253 news_item = N_NUKE_STOP;
257 /* get all hostile abms in range */
258 msl_sel(irvlist, x, y, bombown, wantflags, nowantflags, 0);
260 emp_initque(intlist);
261 /* First choose interceptors belonging to the target sector */
262 /* only allow two defense missiles per missile attack */
263 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
265 ip = (struct plist *)qp;
267 if (pp->pln_own != sect.sct_own)
270 if (mission_pln_equip(ip, NULL, 'i') < 0) {
275 /* got one interceptor, delete from irv_list and
279 emp_insque(qp, intlist);
280 putplane(pp->pln_uid, pp);
283 /* only allow two defense missiles per missile attack */
284 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
286 ip = (struct plist *)qp;
289 if (mission_pln_equip(ip, NULL, 'i') < 0) {
294 /* got one interceptor, delete from irv_list and
298 emp_insque(qp, intlist);
299 putplane(pp->pln_uid, pp);
302 /* Now, clean out the queue */
303 while (!QEMPTY(irvlist)) {
304 qp = irvlist->q_forw;
309 mpr(sect.sct_own, "No %ss launched to intercept.\n", def_name);
313 /* attempt to destroy incoming missile */
315 while (!QEMPTY(intlist)) {
316 qp = intlist->q_forw;
317 ip = (struct plist *)qp;
321 mpr(bombown, "%s %s launched in defense!\n",
322 cname(pp->pln_own), def_name);
323 if (sect.sct_own == pp->pln_own) {
324 mpr(sect.sct_own, "%s launched to intercept %s %s!\n",
325 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",
339 att_name, cname(pp->pln_own), def_name);
340 mpr(sect.sct_own, "%s %s intercepted!\n", who, att_name);
341 if (sect.sct_own != pp->pln_own)
342 mpr(pp->pln_own, "%s %s intercepted!\n", who, att_name);
345 /* zap the missile */
347 putplane(pp->pln_uid, pp);
353 /* Clean out what is left in the list */
354 while (!QEMPTY(intlist)) {
355 qp = intlist->q_forw;
362 mpr(bombown, "%s made it through %s defenses!\n",
364 mpr(sect.sct_own, "%s made it through %s defenses!\n",
370 /* Keep launching missiles on list until mindam damage has been done */
372 msl_launch_mindam(struct emp_qelem *list, coord x, coord y, int hardtarget,
373 int type, int mindam, char *whatp, int victim)
375 struct emp_qelem *qp;
376 struct emp_qelem *next;
382 if (type == EF_SHIP) {
383 news_item = N_SHP_MISS;
384 snews_item = N_SHP_SMISS;
385 } else if (type == EF_LAND) {
386 news_item = N_LND_MISS;
387 snews_item = N_LND_SMISS;
389 news_item = N_SCT_MISS;
390 snews_item = N_SCT_SMISS;
393 for (qp = list->q_back; qp != list && dam < mindam;
396 plp = (struct plist *)qp;
398 if (mission_pln_equip(plp, NULL, 'p') >= 0) {
399 if (msl_hit(&plp->plane,
400 hardtarget, type, news_item, snews_item,
401 whatp, x, y, victim)) {
402 newdam = pln_damage(&plp->plane, 'p', 1);
406 * FIXME want collateral damage on miss, but we get here
407 * too when launch fails or missile is intercepted
410 /* Missiles that miss have to hit somewhere! */
411 newdam = pln_damage(&plp->plane, 'p', 0);
412 collateral_damage(x, y, newdam);
415 plp->plane.pln_effic = 0;
416 putplane(plp->plane.pln_uid, &plp->plane);