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 * laun.c: Launch missiles from land or sea
30 * Known contributors to this file:
33 * Steve McClure, 1998-2000
34 * Markus Armbruster, 2005-2009
49 static int launch_as(struct plnstr *pp);
50 static int launch_missile(struct plnstr *pp);
51 static int launch_sat(struct plnstr *pp);
52 static int msl_equip(struct plnstr *, char);
60 struct nstr_item nstr;
65 if (!snxtitem(&nstr, EF_PLANE, player->argp[1], NULL))
67 while (nxtitem(&nstr, &plane)) {
68 if (plane.pln_own != player->cnum)
70 pcp = &plchr[(int)plane.pln_type];
71 if ((pcp->pl_flags & (P_M | P_O)) == 0) {
72 pr("%s isn't a missile!\n", prplane(&plane));
75 if (pcp->pl_flags & P_F) {
76 pr("%s is a surface-to-air missile!\n", prplane(&plane));
79 if (pcp->pl_flags & P_N) {
80 pr("%s is an anti-ballistic-missile missile!\n",
84 if (pln_is_in_orbit(&plane)) {
85 pr("%s already in orbit!\n", prplane(&plane));
89 if (ontradingblock(EF_PLANE, &plane)) {
90 pr("plane #%d inelligible - it's for sale.\n",
96 if (plane.pln_effic < 40) {
97 pr("%s is damaged (%d%%)\n", prplane(&plane), plane.pln_effic);
100 if (!pln_airbase_ok(&plane, 1, 1))
102 pr("%s at %s; range %d, eff %d%%\n", prplane(&plane),
103 xyas(plane.pln_x, plane.pln_y, player->cnum),
104 plane.pln_range, plane.pln_effic);
105 if (!(pcp->pl_flags & P_O)) {
106 retval = launch_missile(&plane);
108 } else if ((pcp->pl_flags & (P_M | P_O)) == (P_M | P_O)) {
109 retval = launch_as(&plane);
111 } else { /* satellites */
112 retval = launch_sat(&plane);
113 gone = !(plane.pln_flags & PLN_LAUNCHED);
115 if (retval != RET_OK)
119 putplane(plane.pln_uid, &plane);
126 * Launch anti-sat weapon PP.
127 * Return RET_OK if launched (even when missile explodes),
128 * else RET_SYN or RET_FAIL.
131 launch_as(struct plnstr *pp)
136 cp = getstarg(player->argp[2], "Target satellite? ", buf);
137 if (!check_plane_ok(pp))
141 if (!getplane(atoi(cp), &plane) || !plane.pln_own
142 || !pln_is_in_orbit(&plane)) {
143 pr("No such satellite exists!\n");
145 /* Can be abused to find satellite ids. Tolerable. */
148 if (mapdist(pp->pln_x, pp->pln_y, plane.pln_x, plane.pln_y)
150 pr("Range too great!\n");
153 if (msl_equip(pp, 'i') < 0)
155 if (msl_launch(pp, EF_PLANE, prplane(&plane),
156 plane.pln_x, plane.pln_y, plane.pln_own, NULL) < 0)
158 if (msl_hit(pp, pln_def(&plane), EF_PLANE, 0, 0, 0, plane.pln_own)) {
159 pr("Satellite shot down\n");
160 mpr(plane.pln_own, "%s anti-sat destroyed %s over %s\n",
161 cname(player->cnum), prplane(&plane),
162 xyas(plane.pln_x, plane.pln_y, plane.pln_own));
163 nreport(pp->pln_own, N_SAT_KILL, plane.pln_own, 1);
165 putplane(plane.pln_uid, &plane);
172 * Return RET_OK if launched (even when missile explodes),
173 * else RET_SYN or RET_FAIL.
176 launch_missile(struct plnstr *pp)
178 struct plchrstr *pcp = plchr + pp->pln_type;
180 int n, dam, sublaunch;
183 struct shpstr target_ship;
190 if (pcp->pl_flags & P_MAR)
191 cp = getstarg(player->argp[2], "Target ship? ", buf);
193 cp = getstarg(player->argp[2], "Target sector? ", buf);
196 if (!check_plane_ok(pp))
198 if (sarg_type(cp) == NS_LIST) {
199 if (!(pcp->pl_flags & P_MAR)) {
200 pr("Missile not designed to attack ships!\n");
204 if ((n < 0) || !getship(n, &target_ship) ||
205 !target_ship.shp_own) {
206 pr("Bad ship number!\n");
209 sx = target_ship.shp_x;
210 sy = target_ship.shp_y;
211 mcp = &mchr[(int)target_ship.shp_type];
212 if (mcp->m_flags & M_SUB) {
213 pr("Bad ship number!\n");
216 } else if (!sarg_xy(cp, &sx, &sy)) {
217 pr("Not a sector!\n");
220 if (pcp->pl_flags & P_MAR) {
221 pr("Missile designed to attack ships!\n");
226 if (mapdist(pp->pln_x, pp->pln_y, sx, sy) > pp->pln_range) {
227 pr("Range too great; try again!\n");
230 if (!(pcp->pl_flags & P_MAR)) {
231 if (msl_equip(pp, 's') < 0)
233 getsect(sx, sy, §);
235 natp = getnatp(player->cnum);
236 rel = getrel(natp, sect.sct_own);
237 if ((rel != AT_WAR) && (sect.sct_own != player->cnum) &&
238 (sect.sct_own) && (sect.sct_oldown != player->cnum)) {
239 pr("You are not at war with the player->owner of the target sector!\n");
242 pr("Missile monitoring officer destroys RV before detonation.\n");
246 if (msl_launch(pp, EF_SECTOR, "sector", sx, sy, sect.sct_own,
249 getsect(sx, sy, §);
250 if (!msl_hit(pp, SECT_HARDTARGET, EF_SECTOR,
251 N_SCT_MISS, N_SCT_SMISS, sublaunch, sect.sct_own))
253 if (getnuke(nuk_on_plane(pp), &nuke))
254 detonate(&nuke, sx, sy, pp->pln_flags & PLN_AIRBURST);
256 dam = pln_damage(pp, 's', 1);
257 pr("did %d damage in %s\n", PERCENT_DAMAGE(dam),
258 xyas(sx, sy, player->cnum));
259 if (sect.sct_own != 0) {
262 "Sub missile attack did %d damage in %s\n",
263 dam, xyas(sx, sy, sect.sct_own));
266 "%s missile attack did %d damage in %s\n",
267 cname(player->cnum), dam,
268 xyas(sx, sy, sect.sct_own));
270 sectdamage(§, dam);
274 if (msl_equip(pp, 'p') < 0)
276 if (msl_launch(pp, EF_SHIP, prship(&target_ship),
277 target_ship.shp_x, target_ship.shp_y,
278 target_ship.shp_own, &sublaunch) < 0)
280 getship(n, &target_ship);
281 if (!msl_hit(pp, shp_hardtarget(&target_ship), EF_SHIP,
282 N_SHP_MISS, N_SHP_SMISS, sublaunch,
283 target_ship.shp_own)) {
285 dam = pln_damage(pp, 'p', 0);
286 collateral_damage(target_ship.shp_x, target_ship.shp_y, dam);
289 dam = pln_damage(pp, 'p', 1);
290 check_retreat_and_do_shipdamage(&target_ship, dam);
291 putship(target_ship.shp_uid, &target_ship);
292 getship(target_ship.shp_uid, &target_ship);
293 if (!target_ship.shp_own)
294 pr("%s sunk!\n", prship(&target_ship));
300 * Launch a satellite.
301 * Return RET_OK if launched (even when satellite fails),
302 * else RET_SYN or RET_FAIL.
305 launch_sat(struct plnstr *pp)
316 cp = getstarg(player->argp[2], "Target sector? ", buf);
317 if (!check_plane_ok(pp))
321 if (!sarg_xy(cp, &sx, &sy)) {
322 pr("Bad sector designation!\n");
325 if ((dist = mapdist(pp->pln_x, pp->pln_y, sx, sy)) > pp->pln_range) {
326 pr("Range too great; try again!\n");
329 p = getstring("Geostationary orbit? ", buf);
332 if (!check_plane_ok(pp))
334 if (msl_equip(pp, 'r') < 0)
337 pp->pln_flags |= PLN_SYNCHRONOUS;
338 if (*p == 0 || *p == 'n')
339 pp->pln_flags &= ~(PLN_SYNCHRONOUS);
340 pr("3... 2... 1... Blastoff!!!\n");
341 if (chance(0.07 + (100 - pp->pln_effic) / 100.0)) {
342 pr("KABOOOOM! Range safety officer detonates booster!\n");
346 i = pp->pln_tech + pp->pln_effic;
347 if (chance(1.0 - (i / (i + 50.0)))) {
348 dir = (random() % 6) + 1;
349 sx = xnorm(sx + diroff[dir][0]);
350 sy = ynorm(sy + diroff[dir][1]);
351 pr("Your trajectory was a little off.\n");
353 nreport(player->cnum, N_LAUNCH, 0, 1);
354 if (msl_asat_intercept(pp, sx, sy))
358 CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED);
359 pp->pln_flags |= PLN_LAUNCHED;
360 pp->pln_mobil = pp->pln_mobil > dist ? pp->pln_mobil - dist : 0;
361 putplane(pp->pln_uid, pp);
362 pr("%s positioned over %s, will be ready for use in %d time units\n",
363 prplane(pp), xyas(sx, sy, player->cnum),
364 plane_mob_max - pp->pln_mobil);
369 msl_equip(struct plnstr *pp, char mission)
373 memset(&pl, 0, sizeof(struct plist));
374 pl.pcp = plchr + pp->pln_type;
376 return pln_equip(&pl, NULL, mission);