magvar.hxx

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// Written by Curtis Olson, started July 2000.
//
// Copyright (C) 2000  Curtis L. Olson  - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// $Id: magvar_8hxx-source.html,v 1.15 2007-12-17 15:37:06 curt Exp $


#ifndef _MAGVAR_HXX
#define _MAGVAR_HXX


#ifndef __cplusplus
# error This library requires C++
#endif


class SGMagVar {

private:

    double magvar;
    double magdip;

public:

    SGMagVar();

    ~SGMagVar();

    void update( double lon, double lat, double alt_m, double jd );

    double get_magvar() const { return magvar; }

    double get_magdip() const { return magdip; }
};


double sgGetMagVar( double lon, double lat, double alt_m, double jd );


#endif // _MAGVAR_HXX

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