119 lines
2.9 KiB
C
119 lines
2.9 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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* ship.c: Ship 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 "ship.h"
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/*
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* Table of ship types
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* Initialized on startup from ship.config and deity custom config (if any).
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* Terminated by a sentinel with null m_name.
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*/
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struct mchrstr mchr[SHP_TYPE_MAX + 2];
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#define logx(a, b) (log((a)) / log((b)))
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#define SHP_DEF(b, t) (t ? (b * (logx(t, 40.0) < 1.0 ? 1.0 : \
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logx(t, 40.0))) : b)
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#define SHP_SPD(b, t) (t ? (b * (logx(t, 35.0) < 1.0 ? 1.0 : \
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logx(t, 35.0))) : b)
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#define SHP_VIS(b, t) (b * (1 - (sqrt(t) / 50)))
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#define SHP_RNG(b, t) (t ? (b * (logx(t, 35.0) < 1.0 ? 1.0 : \
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logx(t, 35.0))) : b)
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#define SHP_FIR(b, t) (t ? (b * (logx(t, 60.0) < 1.0 ? 1.0 : \
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logx(t, 60.0))) : b)
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int
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m_armor(struct mchrstr *mcp, int tech)
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{
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return SHP_DEF(mcp->m_armor, MAX(0, tech - mcp->m_tech));
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}
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int
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m_speed(struct mchrstr *mcp, int tech)
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{
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return SHP_SPD(mcp->m_speed, MAX(0, tech - mcp->m_tech));
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}
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int
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m_visib(struct mchrstr *mcp, int tech)
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{
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return SHP_VIS(mcp->m_visib, MAX(0, tech - mcp->m_tech));
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}
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int
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m_frnge(struct mchrstr *mcp, int tech)
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{
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return SHP_RNG(mcp->m_frnge, MAX(0, tech - mcp->m_tech));
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}
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int
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m_glim(struct mchrstr *mcp, int tech)
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{
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return SHP_FIR(mcp->m_glim, MAX(0, tech - mcp->m_tech));
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}
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int
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shp_armor(struct shpstr *sp)
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{
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return m_armor(mchr + sp->shp_type, sp->shp_tech);
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}
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int
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shp_speed(struct shpstr *sp)
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{
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return m_speed(mchr + sp->shp_type, sp->shp_tech);
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}
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int
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shp_visib(struct shpstr *sp)
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{
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return m_visib(mchr + sp->shp_type, sp->shp_tech);
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}
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int
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shp_frnge(struct shpstr *sp)
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{
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return m_frnge(mchr + sp->shp_type, sp->shp_tech);
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}
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int
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shp_glim(struct shpstr *sp)
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{
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return m_glim(mchr + sp->shp_type, sp->shp_tech);
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}
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