/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_MATH_PI_H )
#define INCLUDED_MATH_PI_H

/// \file
/// \brief Pi constants and degrees/radians conversion.

const double c_pi = 3.1415926535897932384626433832795;
const double c_half_pi = c_pi / 2;
const double c_2pi = 2 * c_pi;
const double c_inv_2pi = 1 / c_2pi;

const double c_DEG2RADMULT = c_pi / 180.0;
const double c_RAD2DEGMULT = 180.0 / c_pi;

inline double radians_to_degrees( double radians ){
	return radians * c_RAD2DEGMULT;
}
inline double degrees_to_radians( double degrees ){
	return degrees * c_DEG2RADMULT;
}

#endif
