1 /**
2 * \file angle.h
3 * \brief Various trigoniometric helper functions
4 *
5 * Authors:
6 * Johan Engelen <goejendaagh@zonnet.nl>
7 *
8 * Copyright (C) 2007 authors
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it either under the terms of the GNU Lesser General Public
12 * License version 2.1 as published by the Free Software Foundation
13 * (the "LGPL") or, at your option, under the terms of the Mozilla
14 * Public License Version 1.1 (the "MPL"). If you do not alter this
15 * notice, a recipient may use your version of this file under either
16 * the MPL or the LGPL.
17 *
18 * You should have received a copy of the LGPL along with this library
19 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * You should have received a copy of the MPL along with this library
22 * in the file COPYING-MPL-1.1
23 *
24 * The contents of this file are subject to the Mozilla Public License
25 * Version 1.1 (the "License"); you may not use this file except in
26 * compliance with the License. You may obtain a copy of the License at
27 * http://www.mozilla.org/MPL/
28 *
29 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
30 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
31 * the specific language governing rights and limitations.
32 *
33 */
35 #ifndef LIB2GEOM_SEEN_ANGLE_H
36 #define LIB2GEOM_SEEN_ANGLE_H
38 namespace Geom {
40 #ifndef M_PI
41 # define M_PI 3.14159265358979323846
42 #endif
44 inline double deg_to_rad(double deg) { return deg*M_PI/180.0;}
46 inline double rad_to_deg(double rad) { return rad*180.0/M_PI;}
48 }
50 #endif