2 Copyright (C) 2001-2006, William Joseph.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #if !defined( INCLUDED_MATH_PI_H )
23 #define INCLUDED_MATH_PI_H
26 /// \brief Pi constants and degrees/radians conversion.
28 const double c_pi = 3.1415926535897932384626433832795;
29 const double c_half_pi = c_pi / 2;
30 const double c_2pi = 2 * c_pi;
31 const double c_inv_2pi = 1 / c_2pi;
33 const double c_DEG2RADMULT = c_pi / 180.0;
34 const double c_RAD2DEGMULT = 180.0 / c_pi;
36 inline double radians_to_degrees( double radians ){
37 return radians * c_RAD2DEGMULT;
39 inline double degrees_to_radians( double degrees ){
40 return degrees * c_DEG2RADMULT;