/*! \file piellipsoidmodel.h
 * \brief Contains geo ellipsoid models
*/
/*
	PIP - Platform Independent Primitives
	Contains geo ellipsoid models
	Andrey Bychkov work.a.b@yandex.ru

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation, either version 3 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 Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PIELLIPSOIDMODEL_H
#define PIELLIPSOIDMODEL_H


#include "pimathbase.h"

class PIP_EXPORT PIEllipsoidModel {
public:
	PIEllipsoidModel();
	double eccSquared() const {return eccentricity * eccentricity;} // eccentricity squared
	double b() const {return a * sqrt(1 - eccSquared());}

	static PIEllipsoidModel WGS84Ellipsoid();
	static PIEllipsoidModel PZ90Ellipsoid();
	static PIEllipsoidModel GPSEllipsoid();
	static PIEllipsoidModel KrasovskiyEllipsoid();

	double a; /// Major axis of Earth in meters
	double flattening; /// Flattening (ellipsoid parameter)
	double eccentricity; /// Eccentricity (ellipsoid parameter)
	double angVelocity; /// Angular velocity of Earth in radians/sec
};



#endif // PIELLIPSOIDMODEL_H