Markus Armbruster
d3e0597f0e
(natstr): New member nat_access. (cou_ca): New selector access. (grant_btus, accrued_btus): New. (prod_nat, init_nat): Use grant_btus(). BTUs are now made at the update in addition to login, because that lets us get away with a simple ETU stamp (nat_access). (nat_cap): Replaced by grant_btus(), remove.
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2007, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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* btu.c: Dealing with BTUs
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*
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* Known contributors to this file:
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* Markus Armbruster, 2007
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*/
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#include <config.h>
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#include "file.h"
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#include "nat.h"
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#include "optlist.h"
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#include "prototypes.h"
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#include "sect.h"
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/*
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* Return BTUs produced by CAP in ETU ETUs.
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*/
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static int
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accrued_btus(struct sctstr *cap, int etu)
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{
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double eff, civ;
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switch (cap->sct_type) {
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case SCT_CAPIT:
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case SCT_SANCT:
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eff = cap->sct_effic;
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break;
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case SCT_MOUNT:
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eff = 0;
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break;
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default:
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return 0;
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}
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eff *= cap->sct_work / 100.0;
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if (eff < 0.5)
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eff = 0.5;
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civ = cap->sct_item[I_CIVIL];
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if (civ > 999)
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civ = 999;
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return roundavg(etu * civ * eff * btu_build_rate);
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}
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/*
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* Grant nation NP the BTUs produced by its capital in ETU ETUs.
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* Return whether it has a capital.
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*/
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int
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grant_btus(struct natstr *np, int etu)
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{
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int has_cap, delta;
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struct sctstr sect;
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getsect(np->nat_xcap, np->nat_ycap, §);
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has_cap = np->nat_stat >= STAT_ACTIVE && !influx(np);
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if (has_cap) {
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delta = accrued_btus(§, etu);
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if (delta + np->nat_btu > max_btus)
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np->nat_btu = max_btus;
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else
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np->nat_btu += delta;
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}
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if (np->nat_stat == STAT_VIS || np->nat_stat == STAT_GOD)
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np->nat_btu = max_btus;
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return has_cap;
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}
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