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 * move.c: Misc. move routines
30 * Known contributors to this file:
31 * Markus Armbruster, 2006
43 sector_mcost(struct sctstr *sp, int mobtype)
47 base = dchr[sp->sct_type].d_mob0;
51 /* linear function in eff, d_mob0 at 0%, d_mob1 at 100% */
52 base += (dchr[sp->sct_type].d_mob1 - base) * sp->sct_effic / 100;
53 if (CANT_HAPPEN(base < 0))
56 if (mobtype == MOB_MOVE || mobtype == MOB_MARCH) {
57 /* linear function in road, base at 0%, base/10 at 100% */
59 if (intrchr[INT_ROAD].in_enable)
60 cost -= base * 0.009 * sp->sct_road;
61 } else if (mobtype == MOB_RAIL) {
62 if (!intrchr[INT_RAIL].in_enable || sp->sct_rail <= 0)
64 /* linear function in rail, base at 0%, base/100 at 100% */
65 cost = base - base * 0.0099 * sp->sct_rail;
70 if (CANT_HAPPEN(cost < 0))
73 if (mobtype == MOB_MOVE)
74 return MAX(cost, 0.001);
75 if (sp->sct_own != sp->sct_oldown && sp->sct_mobil <= 0)
76 /* slow down land units in newly taken sectors */
78 return MAX(cost, 0.02);
82 speed_factor(double effspd, int tech)
84 return 480.0 / (effspd + techfact(tech, effspd));