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