/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2004, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire 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
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* 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
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
- * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
- * related information and legal notices. It is expected that any future
- * projects/authors will amend these files as needed.
+ * 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:
- *
+ * Markus Armbruster, 2006-2008
*/
+#include <config.h>
+
#include "misc.h"
-#include "xy.h"
-#include "sect.h"
-#include "path.h"
#include "nat.h"
-#include "common.h"
+#include "optlist.h"
+#include "path.h"
+#include "sect.h"
+#include "xy.h"
double
-sector_mcost(struct sctstr *sp, int do_bonus)
+sector_mcost(struct sctstr *sp, int mobtype)
{
- double d;
+ double base, cost;
- if (!(d = dchr[sp->sct_type].d_mcst))
+ base = dchr[sp->sct_type].d_mob0;
+ if (base < 0)
return -1.0;
-/* Note, the best you can get is a 1.0 here. */
+ if (mobtype == MOB_RAIL && opt_RAILWAYS) {
+ if (!SCT_HAS_RAIL(sp))
+ return -1;
+ mobtype = MOB_MARCH;
+ }
- if (do_bonus == MOB_ROAD) {
- d = d / (1.0 + ((double)sp->sct_road / 122.0));
- } else if (do_bonus == MOB_RAIL) {
- d = d / (1.0 + ((double)sp->sct_rail / 100.0));
+ /* linear function in eff, d_mob0 at 0%, d_mob1 at 100% */
+ base += (dchr[sp->sct_type].d_mob1 - base) * sp->sct_effic / 100;
+ if (CANT_HAPPEN(base < 0))
+ base = 0;
+
+ if (mobtype == MOB_MOVE || mobtype == MOB_MARCH) {
+ /* linear function in road, base at 0%, base/10 at 100% */
+ cost = base;
+ if (intrchr[INT_ROAD].in_enable)
+ cost -= base * 0.009 * sp->sct_road;
+ } else if (mobtype == MOB_RAIL) {
+ if (!intrchr[INT_RAIL].in_enable || sp->sct_rail <= 0)
+ return -1.0;
+ /* linear function in rail, base at 0%, base/100 at 100% */
+ cost = base - base * 0.0099 * sp->sct_rail;
} else {
- if (d < 2.0)
- d = 2.0;
+ CANT_REACH();
+ cost = base;
}
- if (d < 1.0)
- d = 1.0;
- if (dchr[sp->sct_type].d_mcst < 25)
- d = (d * 100.0 - (double)sp->sct_effic) / 500.0;
-/* d = (200.0 + (d - 3.0) * (double)sp->sct_effic) / 500.0;*/
- else
- d = (d * 10.0 - (double)sp->sct_effic) / 115;
+ if (CANT_HAPPEN(cost < 0))
+ cost = 0;
- if (d <= 0.0 || d < MIN_MOBCOST)
- return MIN_MOBCOST;
- return d;
+ if (mobtype == MOB_MOVE)
+ return MAX(cost, 0.001);
+ if (sp->sct_own != sp->sct_oldown && sp->sct_mobil <= 0)
+ /* slow down land units in newly taken sectors */
+ return cost + 0.2;
+ return MAX(cost, 0.02);
+}
+
+double
+speed_factor(double effspd, int tech)
+{
+ return 480.0 / (effspd + techfact(tech, effspd));
+}
+
+/* Minimal efficiency for railway and railway extension (opt_RAILWAYS) */
+#define SCT_RAIL_EFF 5
+#define SCT_RAIL_EXT_EFF 60
+
+/* Is sector SP a railway? */
+#define SCT_IS_RAILWAY(sp) \
+ (dchr[(sp)->sct_type].d_mob1 == 0 && (sp)->sct_effic >= SCT_RAIL_EFF)
+/* May sector SP have a railway extension? */
+#define SCT_MAY_HAVE_RAIL_EXT(sp) \
+ ((sp)->sct_effic >= SCT_RAIL_EXT_EFF)
+/* Does railway sector SP extend railway track into sector TOSP? */
+#define SCT_EXTENDS_RAIL(sp, tosp) \
+ ((sp)->sct_own == (tosp)->sct_own && SCT_MAY_HAVE_RAIL_EXT(tosp))
+
+int
+sct_rail_track(struct sctstr *sp)
+{
+ int i, res;
+ struct sctstr *nsp;
+
+ res = !!SCT_IS_RAILWAY(sp);
+ for (i = DIR_FIRST; i <= DIR_LAST; i++) {
+ nsp = getsectp(sp->sct_x + diroff[i][0],
+ sp->sct_y + diroff[i][1]);
+ if (SCT_IS_RAILWAY(nsp) && SCT_EXTENDS_RAIL(nsp, sp))
+ res++;
+ }
+ return res;
}
projects / empserver / blobdiff