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 * fortdef.c: Fort defends an area.
30 * Known contributors to this file:
35 * The base routines can also be used for general purposes.
36 * Noisy tells whther to send teles, print things, etc.
37 * Defending tells whether they are being defensive, or offensive.
46 #include "prototypes.h"
52 static int sb(natid, natid, struct sctstr *, coord, coord, int, int);
55 * See if any nearby ships will open up on the attacker
56 * Return damage done to attacker, if any.
57 * Subtracts shells used for firing. Responding ships
58 * require military, shells, and guns.
61 shipdef(natid att, natid own, coord x, coord y)
63 return sd(att, own, x, y, NOISY, 1, 1);
67 sd(natid att, natid own, coord x, coord y, int noisy, int defending,
81 snxtitem_dist(&ni, EF_SHIP, x, y, 8);
82 while (nxtitem(&ni, &ship) && eff > 0.30) {
83 if (ship.shp_own == att)
85 if (ship.shp_own == 0)
88 rel = getrel(getnatp(ship.shp_own), own);
89 rel2 = getrel(getnatp(ship.shp_own), att);
90 if ((ship.shp_own != own) && ((rel != ALLIED) || (rel2 != AT_WAR)))
92 if ((mchr[(int)ship.shp_type].m_flags & M_SUB) && !usesubs)
94 range = roundrange(shp_fire_range(&ship));
95 if (range < ni.curdist)
97 dam = shp_fire(&ship);
98 putship(ship.shp_uid, &ship);
102 nreport(ship.shp_own, N_FIRE_BACK, att, 1);
104 nreport(ship.shp_own, N_FIRE_S_ATTACK, att, 1);
105 eff *= (1.0 - (0.01 * dam));
108 pr("Incoming shells do %d damage!\n", dam);
110 if (noisy || (ship.shp_own != own)) {
111 if (ship.shp_own == own)
112 wu(0, own, "%s fired on %s at %s doing %d damage.\n",
113 prship(&ship), cname(att), xyas(x, y, own), dam);
117 "%s fired on %s at %s in defense of %s, doing %d damage.\n",
118 prship(&ship), cname(att), xyas(x, y, ship.shp_own),
122 "%s supported %s attacks against %s at %s, doing %d damage.\n",
123 prship(&ship), cname(own), cname(att),
124 xyas(x, y, ship.shp_own), dam);
128 return (int)(100 - eff * 100);
132 dd(natid att, natid def_own, coord ax, coord ay, int noisy, int defending)
135 struct sctstr firing;
138 if (opt_NO_FORT_FIRE) /* Forts can't fire! */
145 snxtsct_dist(&ns, ax, ay, 8);
146 while (nxtsct(&ns, &firing) && dam < 80) {
147 if (firing.sct_own == att)
149 if (firing.sct_own == 0)
151 rel = getrel(getnatp(firing.sct_own), def_own);
152 rel2 = getrel(getnatp(firing.sct_own), att);
153 if (firing.sct_own != def_own && (rel != ALLIED || rel2 != AT_WAR))
155 /* XXX defdef damage is additive, but ship or land unit damage isn't */
156 dam += sb(att, def_own, &firing, ax, ay, noisy, defending);
163 * See if the sector being fired at will defend itself.
166 sb(natid att, natid def, struct sctstr *sp, coord tx, coord ty, int noisy,
178 range = roundrange(fortrange(sp));
179 range2 = mapdist(sp->sct_x, sp->sct_y, tx, ty);
182 damage = fort_fire(sp);
186 if (sp->sct_own != def)
188 "%s fired on %s in %s in defense of %s, doing %d damage!\n",
189 xyas(sp->sct_x, sp->sct_y, sp->sct_own), cname(att),
190 xyas(tx, ty, sp->sct_own), cname(def), damage);
192 nreport(sp->sct_own, N_FIRE_BACK, att, 1);
194 nreport(sp->sct_own, N_FIRE_F_ATTACK, att, 1);
196 pr("Incoming shell! %d damage done.\007\n", damage);