2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2008, 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 * torp.c: Fire torpedoes at enemy ships
30 * Known contributors to this file:
32 * Thomas Ruschak, 1992
35 * Markus Armbruster, 2004-2008
46 static void anti_torp(int f, int ntorping, int vshipown);
47 static void fire_dchrg(struct shpstr *, struct shpstr *, int);
48 static int fire_torp(struct shpstr *, struct shpstr *, int);
63 struct nstr_item nbst;
69 if (!(p = getstarg(player->argp[1], "From ship(s)? ", buf)))
71 if (!snxtitem(&nbst, EF_SHIP, p))
73 while (nxtitem(&nbst, &sub)) {
74 if (sub.shp_own != player->cnum)
76 if ((mchr[(int)sub.shp_type].m_flags & M_TORP) == 0)
78 if (sub.shp_item[I_GUN] == 0
79 || sub.shp_item[I_SHELL] < SHP_TORP_SHELLS)
81 if (sub.shp_item[I_MILIT] < 1)
83 if (sub.shp_effic < 60)
85 if (sub.shp_mobil <= 0)
89 pr("%d ships are eligible to torp\n", ntorping);
90 snxtitem_rewind(&nbst);
91 while (nxtitem(&nbst, &sub)) {
94 if (sub.shp_own != player->cnum) {
97 if ((mchr[(int)sub.shp_type].m_flags & M_TORP) == 0) {
98 pr("Ship # %d: A %s can't fire torpedoes!\n",
99 sub.shp_uid, mchr[(int)sub.shp_type].m_name);
102 if (sub.shp_item[I_GUN] == 0
103 || sub.shp_item[I_SHELL] < SHP_TORP_SHELLS) {
104 pr("Ship #%d has insufficient armament\n", sub.shp_uid);
107 if (sub.shp_item[I_MILIT] < 1) {
108 pr("Ship #%d has insufficient crew\n", sub.shp_uid);
111 if (sub.shp_effic < 60) {
112 pr("Ship #%d torpedo tubes inoperative.\n", sub.shp_uid);
115 if (sub.shp_mobil <= 0) {
116 pr("Ship #%d has insufficient mobility\n", sub.shp_uid);
120 sprintf(prompt, "Ship %d, target? ", sub.shp_uid);
121 if ((ptr = getstarg(player->argp[2], prompt, buf)) == 0)
123 if (!check_ship_ok(&sub))
125 if ((victno = atoi(ptr)) < 0)
127 if (!getship(victno, &vship))
131 vshipown = vship.shp_own;
132 if (victno == subno) {
133 pr("Shooting yourself, eh? How strange...\n");
136 if (mchr[(int)vship.shp_type].m_flags & M_SUB) {
137 if (!(mchr[(int)sub.shp_type].m_flags & M_SUBT)) {
138 pr("You can't torpedo a submarine!\n");
142 dam = shp_torp(&sub, 1);
144 putship(sub.shp_uid, &sub);
145 if (CANT_HAPPEN(dam < 0)) {
146 pr("Ship #%d has insufficient armament\n", sub.shp_uid);
150 if ((mchr[(int)sub.shp_type].m_flags & M_SUB) == 0)
151 anti_torp(sub.shp_uid, ntorping, vshipown);
152 getship(sub.shp_uid, &sub);
153 if (sub.shp_own == 0)
156 erange = roundrange(torprange(&sub));
157 pr("Effective torpedo range is %d.0\n", erange);
159 getship(victno, &vship);
160 vshipown = vship.shp_own;
161 range = mapdist(sub.shp_x, sub.shp_y, vship.shp_x, vship.shp_y);
162 hitchance = shp_torp_hitchance(&sub, range);
163 if (range <= erange) {
164 pr("Hitchance = %d%%\n", (int)(hitchance * 100));
166 /* Now, can the torpedo even get there? */
167 if (!line_of_sight(NULL, sub.shp_x, sub.shp_y,
168 vship.shp_x, vship.shp_y)) {
169 pr("BOOM!... Torpedo slams into land before reaching target.\n");
170 /* We only tell the victim if we were within range. */
171 if (range <= erange) {
173 wu(0, vshipown, "Torpedo sighted @ %s by %s\n",
174 xyas(sub.shp_x, sub.shp_y, vshipown),
177 } else if (range > erange) {
178 pr("Out of range\n");
179 } else if (chance(hitchance)) {
182 wu(0, vshipown, "%s in %s torpedoed %s for %d damage.\n",
183 prsub(&sub), xyas(sub.shp_x, sub.shp_y, vshipown),
184 prship(&vship), dam);
185 if (vship.shp_rflags & RET_TORPED) {
186 retreat_ship(&vship, 't');
187 shipdamage(&vship, dam);
189 shipdamage(&vship, dam);
190 pr("Torpedo hit %s for %d damage.\n", prship(&vship), dam);
192 if (vship.shp_effic < SHIP_MINEFF)
193 pr("%s sunk!\n", prship(&vship));
194 putship(vship.shp_uid, &vship);
195 if (mchr[(int)sub.shp_type].m_flags & M_SUB)
196 nreport(vshipown, N_TORP_SHIP, 0, 1);
198 nreport(vshipown, N_SHIP_TORP, player->cnum, 1);
202 wu(0, vshipown, "Torpedo sighted @ %s by %s\n",
203 xyas(sub.shp_x, sub.shp_y, vshipown), prship(&vship));
206 if (mchr[(int)sub.shp_type].m_flags & M_SUB)
207 anti_torp(sub.shp_uid, ntorping, vshipown);
213 anti_torp(int f, int ntorping, int vshipown)
221 if (sub.shp_own == vshipown)
224 if ((mchr[(int)sub.shp_type].m_flags & M_SUB) == 0)
225 pr("Starting our attack run...\n");
228 while (getship(x++, &dd) && sub.shp_effic >= SHIP_MINEFF) {
231 if (dd.shp_own != vshipown)
234 if (!fire_torp(&dd, &sub, ntorping))
235 fire_dchrg(&dd, &sub, ntorping);
240 fire_dchrg(struct shpstr *sp, struct shpstr *targ, int ntargets)
242 int range, erange, dam;
244 erange = roundrange(shp_fire_range(sp));
245 range = mapdist(sp->shp_x, sp->shp_y, targ->shp_x, targ->shp_y);
249 if ((mchr[(int)targ->shp_type].m_flags & M_SUB) == 0) {
250 /* Return fire to a torpedo boat */
251 if (mchr[sp->shp_type].m_flags & M_SUB)
252 return; /* sub deck gun can't return fire */
254 putship(sp->shp_uid, sp);
261 pr("Kaboom!!! Incoming shells!\n");
262 if (sp->shp_own != 0)
264 "%s fired at %s\n", prship(sp), prship(targ));
266 pr("BLAM! %d damage!\n", dam);
268 /* Return fire to a submarine */
270 putship(sp->shp_uid, sp);
276 pr("\nCAPTAIN! !!Depth charges!!...\n");
277 if (sp->shp_own != 0)
279 "%s depth charged %s\n", prship(sp), prsub(targ));
280 pr("click...WHAM! %d damage!\n", dam);
282 shipdamage(targ, dam);
283 putship(targ->shp_uid, targ);
287 fire_torp(struct shpstr *sp, struct shpstr *targ, int ntargets)
289 int range, erange, dam;
291 if ((mchr[targ->shp_type].m_flags & M_SUB)
292 && (mchr[sp->shp_type].m_flags & M_SUBT) == 0)
293 return 0; /* need sub-torp to torpedo a sub */
295 erange = roundrange(torprange(sp));
296 range = mapdist(sp->shp_x, sp->shp_y, targ->shp_x, targ->shp_y);
300 if (!line_of_sight(NULL, sp->shp_x, sp->shp_y,
301 targ->shp_x, targ->shp_y))
303 dam = shp_torp(sp, 1);
304 putship(sp->shp_uid, sp);
308 pr("Captain! Torpedoes sighted!\n");
310 if (chance(shp_torp_hitchance(sp, range))) {
312 if (sp->shp_own != 0)
313 wu(0, sp->shp_own, "%s @ %s torpedoed %s\n",
315 xyas(sp->shp_x, sp->shp_y, sp->shp_own), prsub(targ));
319 shipdamage(targ, dam);
320 putship(targ->shp_uid, targ);
322 if (mchr[(int)sp->shp_type].m_flags & M_SUB)
323 nreport(targ->shp_own, N_TORP_SHIP, 0, 1);
325 nreport(targ->shp_own, N_SHIP_TORP, player->cnum, 1);
328 if (sp->shp_own != 0)
330 "%s missed %s with a torp at %s\n",
331 prship(sp), prsub(targ),
332 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
339 prsub(struct shpstr *sp)
341 if (mchr[(int)sp->shp_type].m_flags & M_SUB)