2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2006, 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
52 #include "prototypes.h"
55 msl_equip(struct plnstr *pp)
59 memset(&pl, 0, sizeof(struct plist));
60 pl.pcp = plchr + pp->pln_type;
62 return mission_pln_equip(&pl, 0, 0, 'p');
66 msl_hit(struct plnstr *pp, int hardtarget, int type, int news_item,
67 int snews_item, char *what, coord x, coord y, int victim)
73 struct plchrstr *pcp = plchr + pp->pln_type;
74 int hitchance = pln_hitchance(pp, hardtarget, type);
78 mpr(pp->pln_own, "Preparing to launch %s at %s %s %s%s\n",
82 (type == EF_SHIP || type == EF_PLANE) ? "in " : "",
83 xyas(x, y, pp->pln_own));
84 mpr(pp->pln_own, "\tLaunching from ");
85 if (pp->pln_ship >= 0) {
86 getship(pp->pln_ship, &ship);
87 mpr(pp->pln_own, "%s in ", prship(&ship));
88 if (mchr[(int)ship.shp_type].m_flags & M_SUB) {
93 mpr(pp->pln_own, "%s\n",
94 xyas(ship.shp_x, ship.shp_y, pp->pln_own));
96 if (pp->pln_harden > 0) {
97 mpr(pp->pln_own, "missile silo at ");
100 from = "on launch pad";
101 mpr(pp->pln_own, "%s\n", xyas(pp->pln_x, pp->pln_y, pp->pln_own));
104 if (chance((0.05 + (100 - pp->pln_effic) / 100.0)
105 * (1 - techfact(pp->pln_tech, 1.0)))) {
106 mpr(pp->pln_own, "KABOOOOM! Missile explodes %s!\n", from);
108 dam = pln_damage(pp, pp->pln_x, pp->pln_y,
109 'p', &dummyi, 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, 0);
126 mpr(pp->pln_own, "\tSHWOOOOOSH! Missile launched!\n");
128 if (pp->pln_nuketype != -1)
129 mpr(pp->pln_own, "\tArming nuclear warheads...\n");
131 if (pcp->pl_flags & P_T)
132 mpr(victim, "Incoming %s missile sighted at %s...\n",
133 sublaunch ? "sub-launched" : cname(pp->pln_own),
136 if (opt_PINPOINTMISSILE == 0 ||
137 (pcp->pl_flags & P_T && !(pcp->pl_flags & P_MAR))) {
138 if (msl_intercept(x, y, pp->pln_own, pcp->pl_def,
139 sublaunch, P_N, P_O)) {
143 if (pcp->pl_flags & P_MAR) {
144 if (shp_missile_defense(x, y, pp->pln_own, pcp->pl_def)) {
149 if (pp->pln_nuketype != -1)
152 mpr(pp->pln_own, "\t%d%% hitchance...", hitchance);
153 hit = (roll(100) <= hitchance);
155 mpr(pp->pln_own, hit ? "HIT!\n" : "miss\n");
156 if (pcp->pl_flags & P_T)
157 mpr(victim, "...Incoming %s missile %s\n",
158 sublaunch ? "" : cname(pp->pln_own),
159 hit ? "HIT!\n" : "missed\n");
160 if (hit && news_item) {
162 nreport(victim, snews_item, 0, 1);
164 nreport(pp->pln_own, news_item, victim, 1);
170 msl_sel(struct emp_qelem *list, coord x, coord y, natid victim,
171 int wantflags, int nowantflags, int mission)
173 struct plchrstr *pcp;
179 snxtitem_all(&ni, EF_PLANE);
180 while (nxtitem(&ni, &plane)) {
184 pcp = &plchr[(int)plane.pln_type];
185 if (!(pcp->pl_flags & P_M))
187 if (wantflags && (pcp->pl_flags & wantflags) != wantflags)
189 if (nowantflags && pcp->pl_flags & nowantflags)
191 if (mission && plane.pln_mission != mission)
193 if (getrel(getnatp(plane.pln_own), victim) >= NEUTRAL)
195 /* missiles go one way, so we can use all the range */
196 if (plane.pln_range < mapdist(x, y, plane.pln_x, plane.pln_y))
198 if (plane.pln_mobil <= 0)
200 if (plane.pln_effic < 100)
202 /* got a valid interceptor */
203 irv = malloc(sizeof(*irv));
206 irv->pcp = &plchr[(int)plane.pln_type];
208 emp_insque(&irv->queue, list);
213 msl_intercept(coord x, coord y, natid bombown, int hardtarget,
214 int sublaunch, int wantflags, int nowantflags)
217 struct plchrstr *pcp;
219 struct emp_qelem *irvlist;
220 struct emp_qelem foo;
221 struct emp_qelem *intlist;
222 struct emp_qelem intfoo;
223 struct emp_qelem *qp;
224 struct emp_qelem *next;
231 char *who = sublaunch ? "" : cname(bombown);
233 getsect(x, y, §);
234 if (wantflags == P_O && !nowantflags) {
235 att_name = "satellite";
236 def_name = "a-sat missile";
237 news_item = N_SAT_KILL;
239 mpr(sect.sct_own, "%s has positioned a satellite over %s\n",
240 sublaunch ? "someone" : cname(bombown),
241 xyas(x, y, sect.sct_own));
243 } else if (wantflags == P_N && nowantflags == P_O) {
244 att_name = "warhead";
246 news_item = sublaunch ? N_NUKE_SSTOP : N_NUKE_STOP;
248 att_name = "elephant";
249 def_name = "tomato"; /* heh -KHS */
250 news_item = N_NUKE_STOP;
254 /* get all hostile abms in range */
255 msl_sel(irvlist, x, y, bombown, wantflags, nowantflags, 0);
257 emp_initque(intlist);
258 /* First choose interceptors belonging to the target sector */
259 /* only allow two defense missiles per missile attack */
260 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
262 ip = (struct plist *)qp;
264 if (pp->pln_own != sect.sct_own)
267 if (mission_pln_equip(ip, 0, 0, 'i') < 0) {
272 /* got one interceptor, delete from irv_list and
276 emp_insque(qp, intlist);
277 putplane(pp->pln_uid, pp);
280 /* only allow two defense missiles per missile attack */
281 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
283 ip = (struct plist *)qp;
286 if (mission_pln_equip(ip, 0, 0, 'i') < 0) {
291 /* got one interceptor, delete from irv_list and
295 emp_insque(qp, intlist);
296 putplane(pp->pln_uid, pp);
299 /* Now, clean out the queue */
300 while (!QEMPTY(irvlist)) {
301 qp = irvlist->q_forw;
306 if (sect.sct_own != 0)
307 mpr(sect.sct_own, "No %ss launched to intercept.\n", def_name);
311 /* attempt to destroy incoming missile */
313 while (!QEMPTY(intlist)) {
314 qp = intlist->q_forw;
315 ip = (struct plist *)qp;
319 mpr(bombown, "%s %s launched in defense!\n",
320 cname(pp->pln_own), def_name);
321 if (sect.sct_own == pp->pln_own) {
322 mpr(sect.sct_own, "%s launched to intercept %s %s!\n",
323 def_name, who, att_name);
327 "%s launched an %s to intercept the %s %s!\n",
328 cname(pp->pln_own), def_name, who, att_name);
330 "%s launched to intercept %s %s arcing towards %s territory!\n",
331 def_name, who, att_name, cname(sect.sct_own));
335 msl_hit(pp, hardtarget, EF_PLANE, news_item, news_item,
336 att_name, x, y, bombown)) {
337 mpr(bombown, "%s destroyed by %s %s!\n",
338 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 */
346 makelost(EF_PLANE, pp->pln_own, pp->pln_uid, pp->pln_x, pp->pln_y);
348 putplane(pp->pln_uid, pp);
354 /* Clean out what is left in the list */
355 while (!QEMPTY(intlist)) {
356 qp = intlist->q_forw;
363 mpr(bombown, "%s made it through %s defenses!\n",
366 mpr(sect.sct_own, "%s made it through %s defenses!\n",
372 /* Keep launching missiles on list until mindam damage has been done */
374 msl_launch_mindam(struct emp_qelem *list, coord x, coord y, int hardtarget,
375 int type, int mindam, char *whatp, int victim,
378 struct emp_qelem *qp;
379 struct emp_qelem *next;
386 if (type == EF_SHIP) {
387 news_item = N_SHP_MISS;
388 snews_item = N_SHP_SMISS;
389 } else if (type == EF_LAND) {
390 news_item = N_LND_MISS;
391 snews_item = N_LND_SMISS;
393 news_item = N_SCT_MISS;
394 snews_item = N_SCT_SMISS;
397 for (qp = list->q_back; qp != list && dam < mindam && !nukedam;
400 plp = (struct plist *)qp;
402 if (mission_pln_equip(plp, 0, 0, 'p') >= 0) {
403 if (msl_hit(&plp->plane,
404 hardtarget, type, news_item, snews_item,
405 whatp, x, y, victim)) {
406 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 1);
408 if (mission == MI_INTERDICT && type == EF_SECTOR)
413 /* Missiles that miss have to hit somewhere! */
414 newdam = pln_damage(&plp->plane, x, y, 'p', &nukedam, 0);
415 collateral_damage(x, y, newdam, 0);
417 makelost(EF_PLANE, plp->plane.pln_own, plp->plane.pln_uid,
418 plp->plane.pln_x, plp->plane.pln_y);
419 plp->plane.pln_own = 0;
420 putplane(plp->plane.pln_uid, &plp->plane);