49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/*
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* units.h - some conversion definitions
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*
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* Copyright (C) 1992-2011 jean-pierre.charras
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* Copyright (C) 1992-2011 Kicad Developers, see change_log.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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 package; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef __UNITS_H
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#define __UNITS_H
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#include <math.h>
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#include "units_scales.h"
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#ifdef __MINGW32__
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#define atanh(x) (0.5 * log((1.0 + (x)) / (1.0 - (x))))
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#define asinh(x) log((x) + sqrt((x) * (x) + 1.0))
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#define acosh(x) log((x) + sqrt((x) * (x) - 1.0))
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#endif
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#ifndef M_PI
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#define M_PI 3.1415926535897932384626433832795029 /* pi */
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#endif
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#ifndef M_E
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#define M_E 2.7182818284590452353602874713526625 /* e */
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#endif
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#define MU0 12.566370614e-7 // magnetic constant
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#define C0 299792458.0 // speed of light in vacuum
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#define ZF0 376.73031346958504364963 // wave resistance in vacuum
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#endif /* __UNITS_H */
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