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)
68 mpr(pp->pln_own, "Preparing to launch %s at %s %s %s%s\n",
72 type != EF_SECTOR ? "in " : "",
73 xyas(x, y, pp->pln_own));
74 mpr(pp->pln_own, "\tLaunching from ");
75 if (pp->pln_ship >= 0) {
76 getship(pp->pln_ship, &ship);
77 mpr(pp->pln_own, "%s in ", prship(&ship));
78 if (mchr[(int)ship.shp_type].m_flags & M_SUB) {
83 mpr(pp->pln_own, "%s\n",
84 xyas(ship.shp_x, ship.shp_y, pp->pln_own));
86 if (pp->pln_harden > 0) {
87 mpr(pp->pln_own, "missile silo at ");
90 from = "on launch pad";
91 mpr(pp->pln_own, "%s\n", xyas(pp->pln_x, pp->pln_y, pp->pln_own));
94 CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED);
95 pp->pln_flags |= PLN_LAUNCHED;
96 putplane(pp->pln_uid, pp);
98 if (chance((0.05 + (100 - pp->pln_effic) / 100.0)
99 * (1 - techfact(pp->pln_tech, 1.0)))) {
100 mpr(pp->pln_own, "KABOOOOM! Missile explodes %s!\n", from);
101 if (getnuke(nuk_on_plane(pp), &nuke)) {
102 mpr(pp->pln_own, "%s lost!\n", prnuke(&nuke));
104 putnuke(nuke.nuk_uid, &nuke);
107 dam = pln_damage(pp, 'p', 0) / 2;
108 if (pp->pln_ship >= 0) {
109 shipdamage(&ship, dam);
110 putship(ship.shp_uid, &ship);
112 mpr(pp->pln_own, "Explosion damages %s %d%%\n",
113 xyas(pp->pln_x, pp->pln_y, pp->pln_own), dam);
114 getsect(pp->pln_x, pp->pln_y, §);
115 sectdamage(§, dam);
122 mpr(pp->pln_own, "\tSHWOOOOOSH! Missile launched!\n");
124 if (type != EF_PLANE)
125 mpr(victim, "Incoming %s missile sighted at %s...\n",
126 sublaunch ? "sub-launched" : cname(pp->pln_own),
129 if (type == EF_SECTOR || type == EF_LAND) {
130 if (msl_abm_intercept(pp, x, y, sublaunch))
133 if (type == EF_SHIP) {
134 if (shp_missile_defense(x, y, pp->pln_own, pln_def(pp))) {
140 *sublaunchp = sublaunch;
145 msl_hit(struct plnstr *pp, int hardtarget, int type,
146 int news_item, int snews_item, int sublaunch, natid victim)
150 if (nuk_on_plane(pp) >= 0) {
151 mpr(pp->pln_own, "\tArming nuclear warheads...\n");
154 hitchance = pln_hitchance(pp, hardtarget, type);
155 hit = (roll(100) <= hitchance);
156 mpr(pp->pln_own, "\t%d%% hitchance...%s\n", hitchance,
157 hit ? "HIT!" : "miss");
160 if (type != EF_PLANE)
161 mpr(victim, "...Incoming %s missile %s\n",
162 sublaunch ? "" : cname(pp->pln_own),
163 hit ? "HIT!\n" : "missed\n");
164 if (hit && news_item) {
166 nreport(victim, snews_item, 0, 1);
168 nreport(pp->pln_own, news_item, victim, 1);
174 msl_sel(struct emp_qelem *list, coord x, coord y, natid victim,
175 int wantflags, int nowantflags, int mission)
177 struct plchrstr *pcp;
183 snxtitem_all(&ni, EF_PLANE);
184 while (nxtitem(&ni, &plane)) {
188 pcp = &plchr[(int)plane.pln_type];
189 if (!(pcp->pl_flags & P_M))
191 if (wantflags && (pcp->pl_flags & wantflags) != wantflags)
193 if (nowantflags && pcp->pl_flags & nowantflags)
195 if (mission && plane.pln_mission != mission)
198 plane.pln_radius < mapdist(x, y, plane.pln_opx, plane.pln_opy))
200 if (getrel(getnatp(plane.pln_own), victim) >= NEUTRAL)
202 /* missiles go one way, so we can use all the range */
203 if (plane.pln_range < mapdist(x, y, plane.pln_x, plane.pln_y))
205 if (plane.pln_mobil <= 0)
207 if (plane.pln_effic < 100)
209 if (!pln_airbase_ok(&plane, 1, 0))
211 /* got a valid interceptor */
212 irv = malloc(sizeof(*irv));
214 irv->pcp = &plchr[(int)plane.pln_type];
216 emp_insque(&irv->queue, list);
221 msl_intercept(struct plnstr *msl, struct sctstr *sp, int sublaunch,
222 struct emp_qelem *irvlist, char *att_name, char *def_name,
226 struct emp_qelem *intlist;
227 struct emp_qelem intfoo;
228 struct emp_qelem *qp;
229 struct emp_qelem *next;
233 char *who = sublaunch ? "" : cname(msl->pln_own);
236 emp_initque(intlist);
237 /* First choose interceptors belonging to the target sector */
238 /* only allow two defense missiles per missile attack */
239 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
241 ip = (struct plist *)qp;
243 if (pp->pln_own != sp->sct_own)
245 if (mission_pln_equip(ip, NULL, 'i') < 0) {
250 /* got one interceptor, delete from irv_list and
254 emp_insque(qp, intlist);
255 putplane(pp->pln_uid, pp);
258 /* only allow two defense missiles per missile attack */
259 for (qp = irvlist->q_forw; qp != irvlist && icount < 2; qp = next) {
261 ip = (struct plist *)qp;
263 if (mission_pln_equip(ip, NULL, 'i') < 0) {
268 /* got one interceptor, delete from irv_list and
272 emp_insque(qp, intlist);
273 putplane(pp->pln_uid, pp);
276 /* Now, clean out the queue */
277 while (!QEMPTY(irvlist)) {
278 qp = irvlist->q_forw;
283 mpr(sp->sct_own, "No %ss launched to intercept.\n", def_name);
287 /* attempt to destroy incoming missile */
290 while (!destroyed && !QEMPTY(intlist)) {
291 qp = intlist->q_forw;
292 ip = (struct plist *)qp;
295 mpr(msl->pln_own, "%s %s launched in defense!\n",
296 cname(pp->pln_own), def_name);
297 if (sp->sct_own == pp->pln_own) {
298 mpr(sp->sct_own, "%s launched to intercept %s %s!\n",
299 def_name, who, att_name);
302 "%s launched an %s to intercept the %s %s!\n",
303 cname(pp->pln_own), def_name, who, att_name);
305 "%s launched to intercept %s %s arcing towards %s territory!\n",
306 def_name, who, att_name, cname(sp->sct_own));
309 if (msl_launch(pp, EF_PLANE, att_name, sp->sct_x, sp->sct_y,
310 msl->pln_own, NULL) >= 0
311 && msl_hit(pp, pln_def(msl), EF_PLANE, 0, 0, 0, msl->pln_own)) {
312 mpr(msl->pln_own, "%s destroyed by %s %s!\n",
313 att_name, cname(pp->pln_own), def_name);
314 mpr(sp->sct_own, "%s %s intercepted!\n", who, att_name);
315 if (sp->sct_own != pp->pln_own)
316 mpr(pp->pln_own, "%s %s intercepted!\n", who, att_name);
318 nreport(pp->pln_own, news_item, 0, 1);
320 nreport(pp->pln_own, news_item, msl->pln_own, 1);
323 /* zap the missile */
325 putplane(pp->pln_uid, pp);
329 /* Clean out what is left in the list */
330 while (!QEMPTY(intlist)) {
331 qp = intlist->q_forw;
338 mpr(msl->pln_own, "%s made it through %s defenses!\n",
340 mpr(sp->sct_own, "%s made it through %s defenses!\n",
347 msl_abm_intercept(struct plnstr *msl, coord x, coord y, int sublaunch)
350 struct emp_qelem irvlist;
352 getsect(x, y, §);
353 msl_sel(&irvlist, x, y, msl->pln_own, P_N, P_O, 0);
354 return msl_intercept(msl, §, sublaunch,
355 &irvlist, "warhead", "abm",
356 sublaunch ? N_NUKE_SSTOP : N_NUKE_STOP);
360 msl_asat_intercept(struct plnstr *msl, coord x, coord y)
363 struct emp_qelem irvlist;
365 getsect(x, y, §);
366 mpr(sect.sct_own, "%s has positioned a satellite over %s\n",
367 cname(msl->pln_own), xyas(x, y, sect.sct_own));
368 msl_sel(&irvlist, x, y, msl->pln_own, P_O, 0, 0);
369 return msl_intercept(msl, §, 0,
370 &irvlist, "satellite", "a-sat missile",