115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2016, 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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* plane.c: Plane characteristics
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*
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* Known contributors to this file:
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* Dave Pare, 1986
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* Jeff Bailey
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* Thomas Ruschak, 1992
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* Ken Stevens, 1995
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* Steve McClure, 1998
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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 "plane.h"
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/*
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* Table of plane types
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* Initialized on startup from plane.config and deity custom config (if any).
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* Terminated by a sentinel with null pl_name.
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*/
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struct plchrstr plchr[PLN_TYPE_MAX + 2];
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#define logx(a, b) (log((a)) / log((b)))
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#define PLN_ATTDEF(b, t) (b + ((b?1:0) * ((t/20)>10?10:(t/20))))
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#define PLN_ACC(b, t) (b * (1.0 - (sqrt(t) / 50.)))
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#define PLN_RAN(b, t) (t ? (b + (logx(t, 2.0))) : b)
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#define PLN_LOAD(b, t) (t ? (b * (logx(t, 50.0) < 1.0 ? 1.0 : \
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logx(t, 50.0))) : b)
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int
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pl_att(struct plchrstr *pcp, int tech)
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{
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return PLN_ATTDEF(pcp->pl_att, MAX(0, tech - pcp->pl_tech));
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}
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int
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pl_def(struct plchrstr *pcp, int tech)
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{
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return PLN_ATTDEF(pcp->pl_def, MAX(0, tech - pcp->pl_tech));
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}
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int
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pl_acc(struct plchrstr *pcp, int tech)
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{
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return PLN_ACC(pcp->pl_acc, MAX(0, tech - pcp->pl_tech));
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}
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int
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pl_range(struct plchrstr *pcp, int tech)
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{
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return PLN_RAN(pcp->pl_range, MAX(0, tech - pcp->pl_tech));
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}
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int
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pl_load(struct plchrstr *pcp, int tech)
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{
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return PLN_LOAD(pcp->pl_load, MAX(0, tech - pcp->pl_tech));
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}
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int
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pln_att(struct plnstr *pp)
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{
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return pl_att(plchr + pp->pln_type, pp->pln_tech);
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}
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int
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pln_def(struct plnstr *pp)
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{
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return pl_def(plchr + pp->pln_type, pp->pln_tech);
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}
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int
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pln_acc(struct plnstr *pp)
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{
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return pl_acc(plchr + pp->pln_type, pp->pln_tech);
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}
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int
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pln_range_max(struct plnstr *pp)
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{
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return pl_range(plchr + pp->pln_type, pp->pln_tech);
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}
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int
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pln_load(struct plnstr *pp)
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{
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return pl_load(plchr + pp->pln_type, pp->pln_tech);
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}
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