2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2010, 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
33 * Markus Armbruster, 2004-2009
51 #include "prototypes.h"
58 msl_launch(struct plnstr *pp, int type, char *what, coord x, coord y,
59 natid victim, int *sublaunchp)
67 mpr(pp->pln_own, "Preparing to launch %s at %s %s %s%s\n",
71 type != EF_SECTOR ? "in " : "",
72 xyas(x, y, pp->pln_own));
73 mpr(pp->pln_own, "\tLaunching from ");
74 if (pp->pln_ship >= 0) {
75 getship(pp->pln_ship, &ship);
76 mpr(pp->pln_own, "%s in ", prship(&ship));
77 if (mchr[(int)ship.shp_type].m_flags & M_SUB) {
82 mpr(pp->pln_own, "%s\n",
83 xyas(ship.shp_x, ship.shp_y, pp->pln_own));
85 if (pp->pln_harden > 0) {
86 mpr(pp->pln_own, "missile silo at ");
89 from = "on launch pad";
90 mpr(pp->pln_own, "%s\n", xyas(pp->pln_x, pp->pln_y, pp->pln_own));
93 if (chance((0.05 + (100 - pp->pln_effic) / 100.0)
94 * (1 - techfact(pp->pln_tech, 1.0)))) {
95 mpr(pp->pln_own, "KABOOOOM! Missile explodes %s!\n", from);
97 dam = pln_damage(pp, 'p', 1) / 2;
98 if (pp->pln_ship >= 0) {
99 shipdamage(&ship, dam);
100 putship(ship.shp_uid, &ship);
102 pr("Explosion damages %s %d%%\n",
103 xyas(pp->pln_x, pp->pln_y, pp->pln_own), dam);
104 getsect(pp->pln_x, pp->pln_y, §);
105 sectdamage(§, dam);
112 CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED);
113 pp->pln_flags |= PLN_LAUNCHED;
114 putplane(pp->pln_uid, pp);
115 mpr(pp->pln_own, "\tSHWOOOOOSH! Missile launched!\n");
117 if (type != EF_PLANE)
118 mpr(victim, "Incoming %s missile sighted at %s...\n",
119 sublaunch ? "sub-launched" : cname(pp->pln_own),
122 if (type == EF_SECTOR || type == EF_LAND) {
123 if (msl_abm_intercept(pp, x, y, sublaunch))
126 if (type == EF_SHIP) {
127 if (shp_missile_defense(x, y, pp->pln_own, pln_def(pp))) {
133 *sublaunchp = sublaunch;
138 msl_hit(struct plnstr *pp, int hardtarget, int type,
139 int news_item, int snews_item, int sublaunch, natid victim)
143 if (nuk_on_plane(pp) >= 0) {
144 mpr(pp->pln_own, "\tArming nuclear warheads...\n");
147 hitchance = pln_hitchance(pp, hardtarget, type);
148 hit = (roll(100) <= hitchance);
149 mpr(pp->pln_own, "\t%d%% hitchance...%s\n", hitchance,
150 hit ? "HIT!" : "miss");
153 if (type != EF_PLANE)
154 mpr(victim, "...Incoming %s missile %s\n",
155 sublaunch ? "" : cname(pp->pln_own),
156 hit ? "HIT!\n" : "missed\n");
157 if (hit && news_item) {
159 nreport(victim, snews_item, 0, 1);
161 nreport(pp->pln_own, news_item, victim, 1);
167 msl_sel(struct emp_qelem *list, coord x, coord y, natid victim,
168 int wantflags, int nowantflags, int mission)
170 struct plchrstr *pcp;
176 snxtitem_all(&ni, EF_PLANE);
177 while (nxtitem(&ni, &plane)) {
181 pcp = &plchr[(int)plane.pln_type];
182 if (!(pcp->pl_flags & P_M))
184 if (wantflags && (pcp->pl_flags & wantflags) != wantflags)
186 if (nowantflags && pcp->pl_flags & nowantflags)
188 if (mission && plane.pln_mission != mission)
191 plane.pln_radius < mapdist(x, y, plane.pln_opx, plane.pln_opy))
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 if (!pln_airbase_ok(&plane, 1, 0))
204 /* got a valid interceptor */
205 irv = malloc(sizeof(*irv));
207 irv->pcp = &plchr[(int)plane.pln_type];
209 emp_insque(&irv->queue, list);
214 msl_intercept(struct plnstr *msl, struct sctstr *sp, int sublaunch,
215 struct emp_qelem *irvlist, char *att_name, char *def_name,
219 struct plchrstr *pcp;
220 struct emp_qelem *intlist;
221 struct emp_qelem intfoo;
222 struct emp_qelem *qp;
223 struct emp_qelem *next;
227 char *who = sublaunch ? "" : cname(msl->pln_own);
230 emp_initque(intlist);
231 /* First choose interceptors belonging to the target sector */
232 /* only allow two defense missiles per missile attack */
233 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
235 ip = (struct plist *)qp;
237 if (pp->pln_own != sp->sct_own)
240 if (mission_pln_equip(ip, NULL, 'i') < 0) {
245 /* got one interceptor, delete from irv_list and
249 emp_insque(qp, intlist);
250 putplane(pp->pln_uid, pp);
253 /* only allow two defense missiles per missile attack */
254 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
256 ip = (struct plist *)qp;
259 if (mission_pln_equip(ip, NULL, 'i') < 0) {
264 /* got one interceptor, delete from irv_list and
268 emp_insque(qp, intlist);
269 putplane(pp->pln_uid, pp);
272 /* Now, clean out the queue */
273 while (!QEMPTY(irvlist)) {
274 qp = irvlist->q_forw;
279 mpr(sp->sct_own, "No %ss launched to intercept.\n", def_name);
283 /* attempt to destroy incoming missile */
286 while (!destroyed && !QEMPTY(intlist)) {
287 qp = intlist->q_forw;
288 ip = (struct plist *)qp;
292 mpr(msl->pln_own, "%s %s launched in defense!\n",
293 cname(pp->pln_own), def_name);
294 if (sp->sct_own == pp->pln_own) {
295 mpr(sp->sct_own, "%s launched to intercept %s %s!\n",
296 def_name, who, att_name);
299 "%s launched an %s to intercept the %s %s!\n",
300 cname(pp->pln_own), def_name, who, att_name);
302 "%s launched to intercept %s %s arcing towards %s territory!\n",
303 def_name, who, att_name, cname(sp->sct_own));
306 if (msl_launch(pp, EF_PLANE, att_name, sp->sct_x, sp->sct_y,
307 msl->pln_own, NULL) >= 0
308 && msl_hit(pp, pln_def(msl), EF_PLANE, 0, 0, 0, msl->pln_own)) {
309 mpr(msl->pln_own, "%s destroyed by %s %s!\n",
310 att_name, cname(pp->pln_own), def_name);
311 mpr(sp->sct_own, "%s %s intercepted!\n", who, att_name);
312 if (sp->sct_own != pp->pln_own)
313 mpr(pp->pln_own, "%s %s intercepted!\n", who, att_name);
315 nreport(pp->pln_own, news_item, 0, 1);
317 nreport(pp->pln_own, news_item, msl->pln_own, 1);
320 /* zap the missile */
322 putplane(pp->pln_uid, pp);
326 /* Clean out what is left in the list */
327 while (!QEMPTY(intlist)) {
328 qp = intlist->q_forw;
335 mpr(msl->pln_own, "%s made it through %s defenses!\n",
337 mpr(sp->sct_own, "%s made it through %s defenses!\n",
344 msl_abm_intercept(struct plnstr *msl, coord x, coord y, int sublaunch)
347 struct emp_qelem irvlist;
349 getsect(x, y, §);
350 msl_sel(&irvlist, x, y, msl->pln_own, P_N, P_O, 0);
351 return msl_intercept(msl, §, sublaunch,
352 &irvlist, "warhead", "abm",
353 sublaunch ? N_NUKE_SSTOP : N_NUKE_STOP);
357 msl_asat_intercept(struct plnstr *msl, coord x, coord y)
360 struct emp_qelem irvlist;
362 getsect(x, y, §);
363 mpr(sect.sct_own, "%s has positioned a satellite over %s\n",
364 cname(msl->pln_own), xyas(x, y, sect.sct_own));
365 msl_sel(&irvlist, x, y, msl->pln_own, P_O, 0, 0);
366 return msl_intercept(msl, §, 0,
367 &irvlist, "satellite", "a-sat missile",