empserver/src/lib/common/move.c
Markus Armbruster 55ff194f7f (lnd_pathcost): New, factored out of lnd_mobcost().
(att_reacting_units): Use it.  Fixes overcharging of inefficient
units.  Broken when Empire3 changed land unit mobility use not to
depend on efficiency, except for supply units.
(lnd_sweep): Use it.  No functional change.

(speed_factor): New, factored out of lnd_pathcost() and shp_mobcost().
2006-06-08 20:43:13 +00:00

81 lines
2.2 KiB
C

/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---
*
* See files README, COPYING and CREDITS in the root of the source
* tree for related information and legal notices. It is expected
* that future projects/authors will amend these files as needed.
*
* ---
*
* move.c: Misc. move routines
*
* Known contributors to this file:
*
*/
#include <config.h>
#include "misc.h"
#include "xy.h"
#include "sect.h"
#include "path.h"
#include "nat.h"
#include "common.h"
double
sector_mcost(struct sctstr *sp, int do_bonus)
{
double d;
d = dchr[sp->sct_type].d_mcst;
if (d <= 0)
return -1.0;
if (do_bonus == MOB_MOVE || do_bonus == MOB_MARCH) {
d = d / (1.0 + sp->sct_road / 122.0);
} else if (do_bonus == MOB_RAIL) {
if (sp->sct_rail <= 0)
return -1.0;
d = d / (1.0 + sp->sct_rail / 100.0);
} else {
if (d < 2.0)
d = 2.0;
}
if (d < 1.0)
d = 1.0;
if (dchr[sp->sct_type].d_mcst < 25)
d = (d * 100.0 - sp->sct_effic) / 500.0;
else
d = (d * 10.0 - sp->sct_effic) / 115;
if (do_bonus == MOB_MOVE)
return MAX(d, MIN_MOBCOST);
if (sp->sct_own != sp->sct_oldown && sp->sct_mobil <= 0
&& do_bonus != MOB_RAIL)
return MAX(d, LND_MINMOBCOST);
return MAX(d, 0.01);
}
double
speed_factor(double effspd, int tech)
{
return 480.0 / (effspd + techfact(tech, effspd));
}