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46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
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/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant 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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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined(INCLUDED_MATH_PI_H)
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#define INCLUDED_MATH_PI_H
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/// \file
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/// \brief Pi constants and degrees/radians conversion.
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const double c_pi = 3.1415926535897932384626433832795;
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const double c_half_pi = c_pi / 2;
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const double c_2pi = 2 * c_pi;
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const double c_inv_2pi = 1 / c_2pi;
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const double c_DEG2RADMULT = c_pi / 180.0;
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const double c_RAD2DEGMULT = 180.0 / c_pi;
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inline double radians_to_degrees(double radians)
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{
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return radians * c_RAD2DEGMULT;
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}
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inline double degrees_to_radians(double degrees)
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{
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return degrees * c_DEG2RADMULT;
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}
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#endif
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