167 lines
4 KiB
C
167 lines
4 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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* land.c: Land unit characteristics
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*
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* Known contributors to this file:
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* Thomas Ruschak, 1992
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* Ken Stevens, 1995
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* Steve McClure, 1998-2000
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*/
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#include <config.h>
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#include <math.h>
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#include "misc.h"
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#include "land.h"
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/*
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* Table of land unit types
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* Initialized on startup from land.config and deity custom config (if any).
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* Terminated by a sentinel with null l_name.
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*/
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struct lchrstr lchr[LND_TYPE_MAX + 2];
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#define logx(a, b) (log((a)) / log((b)))
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#define LND_ATTDEF(b, t) (((b) * (1.0 + ((sqrt((t)) / 100.0) * 4.0))) \
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> 127 ? 127 : \
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((b) * (1.0 + ((sqrt((t)) / 100.0) * 4.0))))
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#define LND_SPD(b, t) ((b * (1.0 + ((sqrt(t) / 100.0) * 2.1))) > 127 \
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? 127 : (b * (1.0 + ((sqrt(t) / 100.0) * 2.1))))
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#define LND_VUL(b, t) ((b * (1.0 - ((sqrt(t) / 100.0) * 1.1))) < 0 \
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? 0 : (b * (1.0 - ((sqrt(t) / 100.0) * 1.1))))
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#define LND_FRG(b, t) ((t) ? \
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((b) * (logx((t), 35.0) < 1.0 ? 1.0 : \
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logx((t), 35.0))) : (b))
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#define LND_DAM(b, t) ((t) ? \
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((b) * (logx((t), 60.0) < 1.0 ? 1.0 : \
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logx((t), 60.0))) : (b))
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#define LND_ACC(b, t) ((b * (1.0 - ((sqrt(t) / 100.0) * 1.1))) < 0 \
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? 0 : (b * (1.0 - ((sqrt(t) / 100.0) * 1.1))))
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#define LND_AAF(b, t) ((b * (1.0 + ((sqrt(t) / 100.0) * 3.0))) > 127 \
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? 127 : (b * (1.0 + ((sqrt(t) / 100.0) * 3.0))))
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float
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l_att(struct lchrstr *lcp, int tech)
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{
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return LND_ATTDEF(lcp->l_att, MAX(0, tech - lcp->l_tech));
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}
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float
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l_def(struct lchrstr *lcp, int tech)
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{
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return LND_ATTDEF(lcp->l_def, MAX(0, tech - lcp->l_tech));
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}
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int
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l_vul(struct lchrstr *lcp, int tech)
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{
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return LND_VUL(lcp->l_vul, MAX(0, tech - lcp->l_tech));
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}
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int
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l_spd(struct lchrstr *lcp, int tech)
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{
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return LND_SPD(lcp->l_spd, MAX(0, tech - lcp->l_tech));
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}
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int
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l_frg(struct lchrstr *lcp, int tech)
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{
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return LND_FRG(lcp->l_frg, MAX(0, tech - lcp->l_tech));
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}
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int
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l_acc(struct lchrstr *lcp, int tech)
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{
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return LND_ACC(lcp->l_acc, MAX(0, tech - lcp->l_tech));
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}
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int
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l_dam(struct lchrstr *lcp, int tech)
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{
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return LND_DAM(lcp->l_dam, MAX(0, tech - lcp->l_tech));
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}
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int
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l_aaf(struct lchrstr *lcp, int tech)
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{
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return LND_AAF(lcp->l_aaf, MAX(0, tech - lcp->l_tech));
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}
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float
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lnd_att(struct lndstr *lp)
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{
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return l_att(lchr + lp->lnd_type, lp->lnd_tech);
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}
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float
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lnd_def(struct lndstr *lp)
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{
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return l_def(lchr + lp->lnd_type, lp->lnd_tech);
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}
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int
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lnd_vul(struct lndstr *lp)
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{
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return l_vul(lchr + lp->lnd_type, lp->lnd_tech);
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}
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int
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lnd_spd(struct lndstr *lp)
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{
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return l_spd(lchr + lp->lnd_type, lp->lnd_tech);
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}
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int
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lnd_vis(struct lndstr *lp)
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{
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return lchr[lp->lnd_type].l_vis;
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}
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int
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lnd_frg(struct lndstr *lp)
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{
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return l_frg(lchr + lp->lnd_type, lp->lnd_tech);
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}
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int
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lnd_acc(struct lndstr *lp)
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{
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return l_acc(lchr + lp->lnd_type, lp->lnd_tech);
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}
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int
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lnd_dam(struct lndstr *lp)
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{
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return l_dam(lchr + lp->lnd_type, lp->lnd_tech);
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}
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int
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lnd_aaf(struct lndstr *lp)
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{
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return l_aaf(lchr + lp->lnd_type, lp->lnd_tech);
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}
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