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 * laun.c: Launch missiles from land or sea
30 * Known contributors to this file:
33 * Steve McClure, 1998-2000
34 * Markus Armbruster, 2005-2008
49 static int launch_as(struct plnstr *pp);
50 static int launch_missile(struct plnstr *pp, int sublaunch);
51 static int launch_sat(struct plnstr *pp);
52 static int msl_equip(struct plnstr *, char);
60 struct nstr_item nstr;
67 if (!snxtitem(&nstr, EF_PLANE, player->argp[1], NULL))
69 while (nxtitem(&nstr, &plane)) {
70 if (plane.pln_own != player->cnum)
72 pcp = &plchr[(int)plane.pln_type];
73 if ((pcp->pl_flags & (P_M | P_O)) == 0) {
74 pr("%s isn't a missile!\n", prplane(&plane));
77 if (pcp->pl_flags & P_F) {
78 pr("%s is a surface-to-air missile!\n", prplane(&plane));
81 if (pcp->pl_flags & P_N) {
82 pr("%s is an anti-ballistic-missile missile!\n",
86 if (pln_is_in_orbit(&plane)) {
87 pr("%s already in orbit!\n", prplane(&plane));
91 if (ontradingblock(EF_PLANE, &plane)) {
92 pr("plane #%d inelligible - it's for sale.\n",
98 if (plane.pln_effic < 40) {
99 pr("%s is damaged (%d%%)\n", prplane(&plane), plane.pln_effic);
102 if (!pln_airbase_ok(&plane, 1, 1))
105 if (plane.pln_ship >= 0) {
106 getship(plane.pln_ship, &ship);
107 if (mchr[(int)ship.shp_type].m_flags & M_SUB)
110 pr("%s at %s; range %d, eff %d%%\n", prplane(&plane),
111 xyas(plane.pln_x, plane.pln_y, player->cnum),
112 plane.pln_range, plane.pln_effic);
113 if (!(pcp->pl_flags & P_O)) {
114 retval = launch_missile(&plane, sublaunch);
116 } else if ((pcp->pl_flags & (P_M | P_O)) == (P_M | P_O)) {
117 retval = launch_as(&plane);
119 } else { /* satellites */
120 retval = launch_sat(&plane);
121 gone = !(plane.pln_flags & PLN_LAUNCHED);
123 if (retval != RET_OK)
127 putplane(plane.pln_uid, &plane);
134 * Launch anti-sat weapon PP.
135 * Return RET_OK if launched (even when missile explodes),
136 * else RET_SYN or RET_FAIL.
139 launch_as(struct plnstr *pp)
144 cp = getstarg(player->argp[2], "Target satellite? ", buf);
145 if (!check_plane_ok(pp))
149 if (!getplane(atoi(cp), &plane) || !plane.pln_own
150 || !pln_is_in_orbit(&plane)) {
151 pr("No such satellite exists!\n");
153 /* Can be abused to find satellite ids. Tolerable. */
156 if (mapdist(pp->pln_x, pp->pln_y, plane.pln_x, plane.pln_y)
158 pr("Range too great!\n");
161 if (msl_equip(pp, 'i') < 0)
163 if (msl_hit(pp, pln_def(&plane), EF_PLANE, 0, 0,
164 prplane(&plane), plane.pln_x, plane.pln_y, plane.pln_own)) {
165 pr("Satellite shot down\n");
166 mpr(plane.pln_own, "%s anti-sat destroyed %s over %s\n",
167 cname(player->cnum), prplane(&plane),
168 xyas(plane.pln_x, plane.pln_y, plane.pln_own));
169 nreport(pp->pln_own, N_SAT_KILL, plane.pln_own, 1);
171 putplane(plane.pln_uid, &plane);
178 * If SUBLAUNCH, it's sub-launched.
179 * Return RET_OK if launched (even when missile explodes),
180 * else RET_SYN or RET_FAIL.
183 launch_missile(struct plnstr *pp, int sublaunch)
185 struct plchrstr *pcp = plchr + pp->pln_type;
190 struct shpstr target_ship;
197 if (pcp->pl_flags & P_MAR)
198 cp = getstarg(player->argp[2], "Target ship? ", buf);
200 cp = getstarg(player->argp[2], "Target sector? ", buf);
203 if (!check_plane_ok(pp))
205 if (sarg_type(cp) == NS_LIST) {
206 if (!(pcp->pl_flags & P_MAR)) {
207 pr("Missile not designed to attack ships!\n");
211 if ((n < 0) || !getship(n, &target_ship) ||
212 !target_ship.shp_own) {
213 pr("Bad ship number!\n");
216 sx = target_ship.shp_x;
217 sy = target_ship.shp_y;
218 mcp = &mchr[(int)target_ship.shp_type];
219 if (mcp->m_flags & M_SUB) {
220 pr("Bad ship number!\n");
223 } else if (!sarg_xy(cp, &sx, &sy)) {
224 pr("Not a sector!\n");
227 if (pcp->pl_flags & P_MAR) {
228 pr("Missile designed to attack ships!\n");
233 if (mapdist(pp->pln_x, pp->pln_y, sx, sy) > pp->pln_range) {
234 pr("Range too great; try again!\n");
237 if (!(pcp->pl_flags & P_MAR)) {
238 if (msl_equip(pp, 's') < 0)
240 getsect(sx, sy, §);
242 natp = getnatp(player->cnum);
243 rel = getrel(natp, sect.sct_own);
244 if ((rel != AT_WAR) && (sect.sct_own != player->cnum) &&
245 (sect.sct_own) && (sect.sct_oldown != player->cnum)) {
246 pr("You are not at war with the player->owner of the target sector!\n");
249 pr("Missile monitoring officer destroys RV before detonation.\n");
253 if (!msl_hit(pp, SECT_HARDTARGET, EF_SECTOR, N_SCT_MISS,
254 N_SCT_SMISS, "sector", sx, sy, sect.sct_own)) {
257 * FIXME want collateral damage on miss, but we get here
258 * too when launch fails or missile is intercepted
260 dam = pln_damage(pp, 's', 0);
261 collateral_damage(sect.sct_x, sect.sct_y, dam, 0);
265 if (getnuke(nuk_on_plane(pp), &nuke))
266 detonate(&nuke, sx, sy, pp->pln_flags & PLN_AIRBURST);
268 dam = pln_damage(pp, 's', 1);
269 pr("did %d damage in %s\n", PERCENT_DAMAGE(dam),
270 xyas(sx, sy, player->cnum));
271 if (sect.sct_own != 0) {
274 "Sub missile attack did %d damage in %s\n",
275 dam, xyas(sx, sy, sect.sct_own));
278 "%s missile attack did %d damage in %s\n",
279 cname(player->cnum), dam,
280 xyas(sx, sy, sect.sct_own));
282 sectdamage(§, dam);
286 if (msl_equip(pp, 'p') < 0)
288 if (!msl_hit(pp, shp_hardtarget(&target_ship), EF_SHIP,
289 N_SHP_MISS, N_SHP_SMISS, prship(&target_ship),
290 target_ship.shp_x, target_ship.shp_y,
291 target_ship.shp_own)) {
293 #if 0 /* FIXME see above */
294 dam = pln_damage(pp, 'p', 0);
295 collateral_damage(target_ship.shp_x, target_ship.shp_y, dam, 0);
299 dam = pln_damage(pp, 'p', 1);
300 check_retreat_and_do_shipdamage(&target_ship, dam);
301 putship(target_ship.shp_uid, &target_ship);
302 getship(target_ship.shp_uid, &target_ship);
303 if (!target_ship.shp_own)
304 pr("%s sunk!\n", prship(&target_ship));
310 * Launch a satellite.
311 * Return RET_OK if launched (even when satellite fails),
312 * else RET_SYN or RET_FAIL.
315 launch_sat(struct plnstr *pp)
326 cp = getstarg(player->argp[2], "Target sector? ", buf);
327 if (!check_plane_ok(pp))
331 if (!sarg_xy(cp, &sx, &sy)) {
332 pr("Bad sector designation!\n");
335 if ((dist = mapdist(pp->pln_x, pp->pln_y, sx, sy)) > pp->pln_range) {
336 pr("Range too great; try again!\n");
339 p = getstring("Geostationary orbit? ", buf);
342 if (!check_plane_ok(pp))
344 if (msl_equip(pp, 'r') < 0)
347 pp->pln_flags |= PLN_SYNCHRONOUS;
348 if (*p == 0 || *p == 'n')
349 pp->pln_flags &= ~(PLN_SYNCHRONOUS);
350 pr("3... 2... 1... Blastoff!!!\n");
351 if (chance(0.07 + (100 - pp->pln_effic) / 100.0)) {
352 pr("KABOOOOM! Range safety officer detonates booster!\n");
356 i = pp->pln_tech + pp->pln_effic;
357 if (chance(1.0 - (i / (i + 50.0)))) {
358 dir = (random() % 6) + 1;
359 sx = xnorm(sx + diroff[dir][0]);
360 sy = ynorm(sy + diroff[dir][1]);
361 pr("Your trajectory was a little off.\n");
363 nreport(player->cnum, N_LAUNCH, 0, 1);
364 if (msl_asat_intercept(pp, sx, sy))
368 CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED);
369 pp->pln_flags |= PLN_LAUNCHED;
370 pp->pln_mobil = pp->pln_mobil > dist ? pp->pln_mobil - dist : 0;
371 putplane(pp->pln_uid, pp);
372 pr("%s positioned over %s, will be ready for use in %d time units\n",
373 prplane(pp), xyas(sx, sy, player->cnum),
374 plane_mob_max - pp->pln_mobil);
379 msl_equip(struct plnstr *pp, char mission)
383 memset(&pl, 0, sizeof(struct plist));
384 pl.pcp = plchr + pp->pln_type;
386 return pln_equip(&pl, NULL, mission);