2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2007, 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 * landgun.c: Return values for land and ship gun firing damages
30 * Known contributors to this file:
31 * Markus Armbruster, 2006
39 #include "prototypes.h"
44 landgun(int effic, int guns)
47 double g = MIN(guns, 7);
49 d = (random() % 30 + 20.0) * (g / 7.0);
55 seagun(int effic, int guns)
61 d += 10.0 + random() % 6;
67 landunitgun(int effic, int shots, int guns, int ammo, int shells)
71 shots = MIN(shots, guns);
73 d += 5.0 + random() % 6;
75 if (shells < ammo && ammo != 0)
76 d *= (double)shells / (double)ammo;
81 * Return effective firing range for range factor RNG at tech TLEV.
84 effrange(int rng, double tlev)
86 /* FIXME don't truncate TLEV */
87 return techfact((int)tlev, rng / 2.0);
91 * Return torpedo range for ship SP.
94 torprange(struct shpstr *sp)
96 return effrange(sp->shp_frnge * 2, sp->shp_tech)
97 * sp->shp_effic / 100.0;
101 * Return firing range for sector SP.
104 fortrange(struct sctstr *sp)
106 struct natstr *np = getnatp(sp->sct_own);
109 if (sp->sct_type != SCT_FORTR || sp->sct_effic < FORTEFF)
112 rng = effrange(14.0 * fire_range_factor, np->nat_level[NAT_TLEV]);
113 if (sp->sct_effic > 59)