src/lib/update/age.c

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/*
 *  Empire - A multi-player, client/server Internet based war game.
 *  Copyright (C) 1986-2007, 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.
 *
 *  ---
 *
 *  age.c: Age people
 * 
 *  Known contributors to this file:
 *     Dave Pare, 1986
 */

#include <config.h>

#include "update.h"

void
age_levels(int etu)
{
    float best_tech, best_res;
    struct natstr *np;
    int i;
    double level;
    double delta;
    int deltares;

    best_tech = 0.0;
    best_res = 0.0;
    for (i = 0; NULL != (np = getnatp(i)); i++) {
        if (np->nat_stat != STAT_ACTIVE)
            continue;

        if (best_tech < np->nat_level[NAT_TLEV])
            best_tech = np->nat_level[NAT_TLEV];
        if (best_res < np->nat_level[NAT_RLEV])
            best_res = np->nat_level[NAT_RLEV];
        if (level_age_rate != 0.0) {
            delta = np->nat_level[NAT_RLEV] * etu / (100 * level_age_rate);
            np->nat_level[NAT_RLEV] -= delta;
            delta = np->nat_level[NAT_TLEV] * etu / (100 * level_age_rate);
            np->nat_level[NAT_TLEV] -= delta;
        }
        /*
         * age reserves by 1% per every 24 etus
         */
        deltares = -roundavg(np->nat_reserve * etu / 2400.0);
        if (deltares != 0)
            np->nat_reserve += deltares;
        /* Chad Zabel - above number is negative ( was a -= there
           which was wrong. */
    }
    best_tech /= 5;
    best_res /= 5;
    for (i = 0; NULL != (np = getnatp(i)); i++) {
        if (np->nat_stat < STAT_SANCT || np->nat_stat == STAT_GOD)
            continue;
        level = np->nat_level[NAT_TLEV];
        if (level < best_tech && chance(0.2))
            np->nat_level[NAT_TLEV] += (best_tech - level) / 3;
        level = np->nat_level[NAT_RLEV];
        if (level < best_res && chance(0.2))
            np->nat_level[NAT_RLEV] += (best_res - level) / 3;
    }
}

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