Markus Armbruster
c3a839934f
Code never actually retreated them, but it could zap their mission and retreat flags. Harmless, but avoid it anyway. Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
521 lines
13 KiB
C
521 lines
13 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2014, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure, Markus Armbruster
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*
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* Empire is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* retreat.c: Retreat subroutines
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*
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* Known contributors to this file:
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* Steve McClure, 2000
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* Ron Koenderink, 2005-2006
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* Markus Armbruster, 2006-2014
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*/
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#include <config.h>
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#include "chance.h"
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#include "damage.h"
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#include "file.h"
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#include "land.h"
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#include "map.h"
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#include "misc.h"
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#include "nat.h"
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#include "news.h"
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#include "nsc.h"
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#include "optlist.h"
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#include "path.h"
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#include "prototypes.h"
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#include "retreat.h"
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#include "sect.h"
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#include "ship.h"
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#include "xy.h"
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static int findcondition(char);
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static int retreat_land1(struct lndstr *, char, int);
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static int retreat_ship1(struct shpstr *, char, int);
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struct ccode {
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char code;
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char *desc[2];
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};
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static struct ccode conditions[] = {
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{ 'i', { "retreated with a damaged friend",
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"was damaged" } },
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{ 't', { "retreated with a torpedoed ship",
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"was hit by a torpedo" } },
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{ 's', { "retreated with a ship scared by sonar",
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"detected a sonar ping" } },
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{ 'h', { "retreated with a helpless ship",
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"was fired upon with no one able to defend it" } },
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{ 'b', { "retreated with a bombed friend",
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"was bombed" } },
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{ 'd', { "retreated with a depth-charged ship",
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"was depth-charged" } },
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{ 'u', { "retreated with a boarded ship", "was boarded" } },
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{ 0, { "panicked", "panicked"} }
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};
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int
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check_retreat_and_do_shipdamage(struct shpstr *sp, int dam)
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{
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if (dam <= 0)
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return 0;
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shipdamage(sp, dam);
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if (sp->shp_rflags & RET_INJURED)
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retreat_ship(sp, 'i');
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return 1;
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}
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void
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retreat_ship(struct shpstr *sp, char code)
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{
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struct nstr_item ni;
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struct shpstr ship;
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if (CANT_HAPPEN(!sp->shp_own))
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return;
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retreat_ship1(sp, code, 1);
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if (sp->shp_rpath[0] == 0)
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sp->shp_rflags = 0;
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if (sp->shp_rflags & RET_GROUP) {
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snxtitem_group(&ni, EF_SHIP, sp->shp_fleet);
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while (nxtitem(&ni, &ship))
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if (ship.shp_own == sp->shp_own) {
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if (ship.shp_uid != sp->shp_uid) {
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retreat_ship1(&ship, code, 0);
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getship(ship.shp_uid, &ship);
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if (ship.shp_rpath[0] == 0) {
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ship.shp_rflags = 0;
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putship(ship.shp_uid, &ship);
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}
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}
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}
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}
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}
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static int
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retreat_ship1(struct shpstr *sp, char code, int orig)
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/* Is this the originally scared ship, or a follower */
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{
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struct sctstr sect;
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int n;
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int m;
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int max;
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int dir;
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coord newx;
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coord newy;
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coord dx;
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coord dy;
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int stopping;
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int mines;
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int shells;
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double mobcost;
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struct mchrstr *mcp;
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int changed;
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if (sp->shp_effic < SHIP_MINEFF) {
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wu(0, sp->shp_own,
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"%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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if (opt_SAIL) {
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/* can't retreat a ship that's sailin, bad things happend */
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if (*sp->shp_path) {
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wu(0, sp->shp_own,
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"%s %s,\nbut had sailing orders, and couldn't retreat!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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}
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/* check crew - uws don't count */
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if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
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wu(0, sp->shp_own,
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"%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
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conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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getsect(sp->shp_x, sp->shp_y, §);
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switch (shp_check_nav(sp, §)) {
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case NAV_02:
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case NAV_60:
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wu(0, sp->shp_own,
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"%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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case NAV_NONE:
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case NAV_CANAL:
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wu(0, sp->shp_own,
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"%s %s,\nbut was landlocked, and couldn't retreat!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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case NAVOK:
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break;
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default:
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CANT_REACH();
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wu(0, sp->shp_own,
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"%s %s,\nbut was subject to an empire error, and couldn't retreat!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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if (sp->shp_mobil <= 0.0) {
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wu(0, sp->shp_own,
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"%s %s,\nbut had no mobility, and couldn't retreat!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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n = -MAX_RETREAT;
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stopping = 0;
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while (!stopping && n) {
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dx = dy = 0;
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if (sp->shp_rpath[0] == 0) {
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stopping = 1;
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continue;
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}
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if (sp->shp_mobil <= 0.0) {
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wu(0, sp->shp_own,
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"%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
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prship(sp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_LAST);
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memmove(sp->shp_rpath, sp->shp_rpath+1, sizeof(sp->shp_rpath) - 1);
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if (dir < 0)
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continue;
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if (dir == DIR_STOP)
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stopping++;
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else {
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dx = diroff[dir][0];
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dy = diroff[dir][1];
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}
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n++;
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mcp = &mchr[(int)sp->shp_type];
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newx = xnorm(sp->shp_x + dx);
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newy = ynorm(sp->shp_y + dy);
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mobcost = shp_mobcost(sp);
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getsect(newx, newy, §);
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if (shp_check_nav(sp, §) != NAVOK ||
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(sect.sct_own
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&& relations_with(sect.sct_own, sp->shp_own) < FRIENDLY)) {
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wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n",
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prship(sp), conditions[findcondition(code)].desc[orig],
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xyas(newx, newy, sp->shp_own));
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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sp->shp_x = newx;
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sp->shp_y = newy;
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sp->shp_mobil -= mobcost;
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sp->shp_mission = 0;
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if (stopping)
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continue;
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mines = sect.sct_mines;
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changed = 0;
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if (sect.sct_type != SCT_WATER || mines <= 0)
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continue;
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if (mcp->m_flags & M_SWEEP) {
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max = mcp->m_item[I_SHELL];
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shells = sp->shp_item[I_SHELL];
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for (m = 0; mines > 0 && m < 5; m++) {
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if (chance(0.66)) {
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mines--;
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shells = MIN(max, shells + 1);
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changed |= map_set(sp->shp_own, sp->shp_x, sp->shp_y,
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'X', 0);
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}
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}
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if (sect.sct_mines != mines) {
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wu(0, sp->shp_own,
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"%s cleared %d mine%s in %s while retreating\n",
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prship(sp), sect.sct_mines - mines,
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splur(sect.sct_mines - mines),
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xyas(newx, newy, sp->shp_own));
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sect.sct_mines = mines;
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sp->shp_item[I_SHELL] = shells;
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putsect(§);
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}
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if (changed)
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writemap(sp->shp_own);
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}
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if (chance(DMINE_HITCHANCE(mines))) {
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wu(0, sp->shp_own,
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"%s %s,\nand hit a mine in %s while retreating!\n",
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prship(sp), conditions[findcondition(code)].desc[orig],
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xyas(newx, newy, sp->shp_own));
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nreport(sp->shp_own, N_HIT_MINE, 0, 1);
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m = MINE_DAMAGE();
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shipdamage(sp, m);
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mines--;
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if (map_set(sp->shp_own, sp->shp_x, sp->shp_y, 'X', 0))
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writemap(sp->shp_own);
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sect.sct_mines = mines;
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putsect(§);
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if (!orig)
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putship(sp->shp_uid, sp);
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return 0;
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}
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}
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if (orig) {
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wu(0, sp->shp_own, "%s %s, and retreated to %s\n",
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prship(sp), conditions[findcondition(code)].desc[orig],
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xyas(sp->shp_x, sp->shp_y, sp->shp_own));
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} else {
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wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
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prship(sp),
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conditions[findcondition(code)].desc[orig],
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xyas(sp->shp_x, sp->shp_y, sp->shp_own));
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}
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if (!orig)
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putship(sp->shp_uid, sp);
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return 1;
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}
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static int
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findcondition(char code)
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{
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int i;
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for (i = 0; conditions[i].code && conditions[i].code != code; i++) ;
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CANT_HAPPEN(!conditions[i].code);
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return i;
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}
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int
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check_retreat_and_do_landdamage(struct lndstr *lp, int dam)
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{
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if (dam <= 0)
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return 0;
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landdamage(lp, dam);
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if (lp->lnd_rflags & RET_INJURED)
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retreat_land(lp, 'i');
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return 1;
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}
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void
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retreat_land(struct lndstr *lp, char code)
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{
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struct nstr_item ni;
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struct lndstr land;
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if (CANT_HAPPEN(!lp->lnd_own))
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return;
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retreat_land1(lp, code, 1);
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if (lp->lnd_rpath[0] == 0)
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lp->lnd_rflags = 0;
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if (lp->lnd_rflags & RET_GROUP) {
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snxtitem_group(&ni, EF_LAND, lp->lnd_army);
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while (nxtitem(&ni, &land))
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if (land.lnd_own == lp->lnd_own) {
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if (land.lnd_uid != lp->lnd_uid) {
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retreat_land1(&land, code, 0);
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getland(land.lnd_uid, &land);
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if (land.lnd_rpath[0] == 0) {
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land.lnd_rflags = 0;
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putland(land.lnd_uid, &land);
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}
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}
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}
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}
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}
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static int
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retreat_land1(struct lndstr *lp, char code, int orig)
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/* Is this the originally scared unit, or a follower */
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{
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struct sctstr sect;
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int n;
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int m;
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int max;
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int dir;
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coord newx;
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coord newy;
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coord dx;
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coord dy;
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int stopping;
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int mines;
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int shells;
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double mobcost;
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struct lchrstr *lcp;
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if (lp->lnd_effic < LAND_MINEFF) {
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wu(0, lp->lnd_own,
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"%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
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prland(lp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putland(lp->lnd_uid, lp);
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return 0;
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}
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getsect(lp->lnd_x, lp->lnd_y, §);
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if (lp->lnd_mobil <= 0.0) {
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wu(0, lp->lnd_own,
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"%s %s,\nbut had no mobility, and couldn't retreat!\n",
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prland(lp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putland(lp->lnd_uid, lp);
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return 0;
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}
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n = -MAX_RETREAT;
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stopping = 0;
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while (!stopping && n) {
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dx = dy = 0;
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if (lp->lnd_rpath[0] == 0) {
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stopping = 1;
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continue;
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}
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if (lp->lnd_mobil <= 0.0) {
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wu(0, lp->lnd_own,
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"%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
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prland(lp), conditions[findcondition(code)].desc[orig]);
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if (!orig)
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putland(lp->lnd_uid, lp);
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return 0;
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}
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dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_LAST);
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memmove(lp->lnd_rpath, lp->lnd_rpath+1, sizeof(lp->lnd_rpath) - 1);
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if (dir < 0)
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continue;
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if (dir == DIR_STOP)
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stopping++;
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else {
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dx = diroff[dir][0];
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dy = diroff[dir][1];
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}
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n++;
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lcp = &lchr[(int)lp->lnd_type];
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newx = xnorm(lp->lnd_x + dx);
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newy = ynorm(lp->lnd_y + dy);
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getsect(newx, newy, §);
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mobcost = lnd_mobcost(lp, §);
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if (mobcost < 0
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|| sect.sct_type == SCT_MOUNT
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|| sect.sct_own != lp->lnd_own) {
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wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
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prland(lp),
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conditions[findcondition(code)].desc[orig],
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xyas(newx, newy, lp->lnd_own));
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if (!orig)
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putland(lp->lnd_uid, lp);
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return 0;
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}
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lp->lnd_x = newx;
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lp->lnd_y = newy;
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lp->lnd_mobil -= mobcost;
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lp->lnd_mission = 0;
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if (stopping)
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continue;
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mines = SCT_LANDMINES(§);
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if (mines <= 0 || sect.sct_oldown == lp->lnd_own)
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continue;
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if (lcp->l_flags & L_ENGINEER) {
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max = lcp->l_item[I_SHELL];
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shells = lp->lnd_item[I_SHELL];
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for (m = 0; mines > 0 && m < 5; m++) {
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if (chance(0.66)) {
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mines--;
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shells = MIN(max, shells + 1);
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}
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}
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sect.sct_mines = mines;
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lp->lnd_item[I_SHELL] = shells;
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putsect(§);
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}
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if (chance(DMINE_LHITCHANCE(mines))) {
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wu(0, lp->lnd_own,
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"%s %s,\nand hit a mine in %s while retreating!\n",
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prland(lp),
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conditions[findcondition(code)].desc[orig],
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xyas(newx, newy, lp->lnd_own));
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nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
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m = MINE_LDAMAGE();
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if (lcp->l_flags & L_ENGINEER)
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m /= 2;
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landdamage(lp, m);
|
|
mines--;
|
|
sect.sct_mines = mines;
|
|
putsect(§);
|
|
if (!orig)
|
|
putland(lp->lnd_uid, lp);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (orig) {
|
|
wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
|
|
prland(lp),
|
|
conditions[findcondition(code)].desc[orig],
|
|
xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
|
|
} else {
|
|
wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
|
|
prland(lp),
|
|
conditions[findcondition(code)].desc[orig],
|
|
xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
|
|
}
|
|
if (!orig)
|
|
putland(lp->lnd_uid, lp);
|
|
return 1;
|
|
}
|