/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2011, 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.
*
* ---
*
* plague.c: Plague related functions
- *
+ *
* Known contributors to this file:
* Steve McClure, 1998-2000
*/
-#include <math.h>
-#include "misc.h"
-#include "var.h"
-#include "sect.h"
-#include "nat.h"
+#include <config.h>
+
#include "item.h"
+#include "lost.h"
#include "news.h"
-#include "file.h"
-#include "xy.h"
-#include "optlist.h"
+#include "plague.h"
#include "update.h"
-#include "common.h"
-#include "subs.h"
-#include "lost.h"
-#include "gen.h"
+
+static int infect_people(struct natstr *, struct sctstr *);
void
do_plague(struct sctstr *sp, struct natstr *np, int etu)
{
- int vec[I_MAX+1];
- int cvec[I_MAX+1];
- int n;
+ int pstage, ptime;
+ int n;
- if (opt_NO_PLAGUE) /* no plague nothing to do */
- return;
+ if (opt_NO_PLAGUE) /* no plague nothing to do */
+ return;
- if (getvec(VT_ITEM, vec, (s_char *)sp, EF_SECTOR) <= 0)
- return;
- if (getvec(VT_COND, cvec, (s_char *)sp, EF_SECTOR) <= 0)
- bzero((s_char *)cvec, sizeof(cvec));
+ pstage = sp->sct_pstage;
+ ptime = sp->sct_ptime;
- if (cvec[C_PSTAGE] == 0) {
- cvec[C_PSTAGE] = infect_people(np, vec, sp->sct_effic,
- (int)sp->sct_mobil, sp);
- cvec[C_PTIME] = 0;
- } else {
- n = plague_people(np, vec, cvec, etu);
- switch (n) {
- case PLG_DYING:
- wu(0, sp->sct_own, "PLAGUE deaths reported in %s.\n",
- ownxy(sp));
- nreport(sp->sct_own, N_DIE_PLAGUE, 0, 1);
- break;
- case PLG_INFECT:
- wu(0, sp->sct_own, "%s battling PLAGUE\n", ownxy(sp));
- break;
- case PLG_INCUBATE:
- /* Are we still incubating? */
- if (n == cvec[C_PSTAGE]) {
- /* Yes. Will it turn "infectious" next time? */
- if (cvec[C_PTIME] <= etu) {
- /* Yes. Report an outbreak. */
- wu(0, sp->sct_own,
- "Outbreak of PLAGUE in %s!\n",
- ownxy(sp));
- nreport(sp->sct_own, N_OUT_PLAGUE, 0, 1);
- }
- } else {
- /* It has already moved on to "infectious" */
- wu(0, sp->sct_own, "%s battling PLAGUE\n", ownxy(sp));
- }
- break;
- case PLG_EXPOSED:
- /* Has the plague moved to "incubation" yet? */
- if (n != cvec[C_PSTAGE]) {
- /* Yes. Will it turn "infectious" next time? */
- if (cvec[C_PTIME] <= etu) {
- /* Yes. Report an outbreak. */
- wu(0, sp->sct_own,
- "Outbreak of PLAGUE in %s!\n",
- ownxy(sp));
- nreport(sp->sct_own, N_OUT_PLAGUE, 0, 1);
- }
- }
- break;
- default:
- break;
+ if (pstage == PLG_HEALTHY) {
+ pstage = infect_people(np, sp);
+ ptime = 0;
+ } else {
+ n = plague_people(np, sp->sct_item, &pstage, &ptime, etu);
+ switch (n) {
+ case PLG_DYING:
+ wu(0, sp->sct_own, "PLAGUE deaths reported in %s.\n",
+ ownxy(sp));
+ nreport(sp->sct_own, N_DIE_PLAGUE, 0, 1);
+ break;
+ case PLG_INFECT:
+ wu(0, sp->sct_own, "%s battling PLAGUE\n", ownxy(sp));
+ break;
+ case PLG_INCUBATE:
+ /* Are we still incubating? */
+ if (n == pstage) {
+ /* Yes. Will it turn "infectious" next time? */
+ if (ptime <= etu) {
+ /* Yes. Report an outbreak. */
+ wu(0, sp->sct_own,
+ "Outbreak of PLAGUE in %s!\n", ownxy(sp));
+ nreport(sp->sct_own, N_OUT_PLAGUE, 0, 1);
}
+ } else {
+ /* It has already moved on to "infectious" */
+ wu(0, sp->sct_own, "%s battling PLAGUE\n", ownxy(sp));
+ }
+ break;
+ case PLG_EXPOSED:
+ /* Has the plague moved to "incubation" yet? */
+ if (n != pstage) {
+ /* Yes. Will it turn "infectious" next time? */
+ if (ptime <= etu) {
+ /* Yes. Report an outbreak. */
+ wu(0, sp->sct_own,
+ "Outbreak of PLAGUE in %s!\n", ownxy(sp));
+ nreport(sp->sct_own, N_OUT_PLAGUE, 0, 1);
+ }
+ }
+ break;
+ default:
+ break;
}
- if (vec[I_CIVIL] == 0 && vec[I_MILIT] == 0 &&
- !has_units(sp->sct_x,sp->sct_y,sp->sct_own,0)) {
- makelost(EF_SECTOR, sp->sct_own, 0, sp->sct_x, sp->sct_y);
- sp->sct_own = 0;
- sp->sct_oldown = 0;
- }
- putvec(VT_ITEM, vec, (s_char *)sp, EF_SECTOR);
- putvec(VT_COND, cvec, (s_char *)sp, EF_SECTOR);
+ }
+ if (sp->sct_item[I_CIVIL] == 0 && sp->sct_item[I_MILIT] == 0
+ && !has_units(sp->sct_x, sp->sct_y, sp->sct_own, NULL)) {
+ makelost(EF_SECTOR, sp->sct_own, 0, sp->sct_x, sp->sct_y);
+ sp->sct_own = 0;
+ sp->sct_oldown = 0;
+ }
+ sp->sct_pstage = pstage;
+ sp->sct_ptime = ptime;
}
/*ARGSUSED*/
-int
-infect_people(struct natstr *np, register int *vec, u_int eff, int mobil, struct sctstr *sp)
+static int
+infect_people(struct natstr *np, struct sctstr *sp)
{
- double plg_num;
- double plg_denom;
- double plg_chance;
- double civvies = 999.0;
+ double pop, pop_space, bad_stuff, pollution, cleanup;
+ double plg_chance;
- if (opt_NO_PLAGUE) /* no plague nothing to do */
- return PLG_HEALTHY;
-
- if (np->nat_level[NAT_TLEV] <= 10.0)
- return PLG_HEALTHY;
-
- if (opt_BIG_CITY && (sp->sct_type == SCT_CAPIT))
- civvies = 9999.0;
+ if (opt_NO_PLAGUE) /* no plague nothing to do */
+ return PLG_HEALTHY;
- /*
- * make plague where there was none before...
- */
- plg_num = ((vec[I_CIVIL] + vec[I_MILIT] + vec[I_UW]) / civvies) *
- ((vec[I_IRON] + vec[I_OIL] + (vec[I_RAD] * 2)) / 10.0 +
- np->nat_level[NAT_TLEV] + 100.0);
- plg_denom = eff + mobil + 100 + np->nat_level[NAT_RLEV];
- plg_chance = ((plg_num / plg_denom) - 1.0) * 0.01;
- if (chance(plg_chance))
- return PLG_EXPOSED;
+ if (np->nat_level[NAT_TLEV] <= 10.0)
return PLG_HEALTHY;
+
+ /*
+ * make plague where there was none before...
+ */
+ pop = sp->sct_item[I_CIVIL] + sp->sct_item[I_MILIT] + sp->sct_item[I_UW];
+ pop_space = max_pop(np->nat_level[NAT_RLEV], sp);
+ bad_stuff
+ = sp->sct_item[I_IRON] + sp->sct_item[I_OIL] + sp->sct_item[I_RAD] * 2;
+ pollution = bad_stuff / 10.0 + np->nat_level[NAT_TLEV] + 100.0;
+ cleanup = sp->sct_effic + sp->sct_mobil + 100 + np->nat_level[NAT_RLEV];
+ plg_chance = ((pop / pop_space) * (pollution / cleanup) - 1.0) * 0.01;
+ if (chance(plg_chance))
+ return PLG_EXPOSED;
+ return PLG_HEALTHY;
}
/*
* stage. No reports generated here anymore.
*/
int
-plague_people(struct natstr *np, register int *vec, register int *cvec, int etus)
+plague_people(struct natstr *np, short *vec,
+ int *pstage, int *ptime, int etus)
{
- int stage;
- double plg_num;
- double plg_denom;
- double pct_left;
+ int stage;
+ double plg_num;
+ double plg_denom;
+ double pct_left;
- if (opt_NO_PLAGUE) /* no plague nothing to do */
- return PLG_HEALTHY;
- cvec[C_PTIME] -= etus;
- stage = cvec[C_PSTAGE];
- switch (stage) {
- case PLG_DYING:
- plg_num = 100.0 * etus;
- plg_denom = (np->nat_level[NAT_RLEV] + 100.0) *
- (vec[C_PTIME] + etus + 1.0);
- pct_left = 1.0 - (double)(plg_num / plg_denom);
- if (pct_left < 0.2)
- pct_left = 0.2;
- vec[I_CIVIL] = vec[I_CIVIL] * pct_left;
- vec[I_MILIT] = vec[I_MILIT] * pct_left;
- vec[I_UW] = vec[I_UW] * pct_left;
- break;
- case PLG_INFECT:
- case PLG_INCUBATE:
- break;
- case PLG_EXPOSED:
- cvec[C_PTIME] = 0;
- break;
- default:
- /* bad */
- cvec[C_PTIME] = 0;
- break;
- }
- if (cvec[C_PTIME] <= 0) {
- cvec[C_PSTAGE]--;
- cvec[C_PTIME] = (etus / 2) + (random() % etus);
- }
- return stage;
+ if (opt_NO_PLAGUE) /* no plague nothing to do */
+ return PLG_HEALTHY;
+ *ptime -= etus;
+ stage = *pstage;
+ switch (stage) {
+ case PLG_DYING:
+ plg_num = 100.0 * etus;
+ plg_denom = (np->nat_level[NAT_RLEV] + 100.0) *
+ (*ptime + etus + 1.0);
+ pct_left = 1.0 - plg_num / plg_denom;
+ if (pct_left < 0.2)
+ pct_left = 0.2;
+ vec[I_CIVIL] = vec[I_CIVIL] * pct_left;
+ vec[I_MILIT] = vec[I_MILIT] * pct_left;
+ vec[I_UW] = vec[I_UW] * pct_left;
+ break;
+ case PLG_INFECT:
+ case PLG_INCUBATE:
+ break;
+ case PLG_EXPOSED:
+ *ptime = 0;
+ break;
+ default:
+ /* bad */
+ logerror("plague_people: bad pstage %d", stage);
+ *pstage = PLG_HEALTHY;
+ *ptime = 0;
+ return PLG_HEALTHY;
+ }
+ if (*ptime <= 0) {
+ *pstage -= 1;
+ *ptime = etus / 2 + random() % etus;
+ }
+ return stage;
}
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