WCSLIB 7.7

wcsmath.h
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1 /*============================================================================
2 WCSLIB 7.7 - an implementation of the FITS WCS standard.
3 Copyright (C) 1995-2021, Mark Calabretta
4
5 This file is part of WCSLIB.
6
7 WCSLIB is free software: you can redistribute it and/or modify it under the
8 terms of the GNU Lesser General Public License as published by the Free
9 Software Foundation, either version 3 of the License, or (at your option)
10 any later version.
11
12 WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
15 more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with WCSLIB. If not, see http://www.gnu.org/licenses.
19
20 Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
21 http://www.atnf.csiro.au/people/Mark.Calabretta
22 $Id: wcsmath.h,v 7.7 2021/07/12 06:36:49 mcalabre Exp $
23 *=============================================================================
24 *
25 * WCSLIB 7.7 - C routines that implement the FITS World Coordinate System
26 * (WCS) standard. Refer to the README file provided with WCSLIB for an
27 * overview of the library.
28 *
29 *
30 * Summary of wcsmath.h
31 * --------------------
32 * Definition of mathematical constants used by WCSLIB.
33 *
34 *===========================================================================*/
35
36 #ifndef WCSLIB_WCSMATH
37 #define WCSLIB_WCSMATH
38
39 #ifdef PI
40 #undef PI
41 #endif
42
43 #ifdef D2R
44 #undef D2R
45 #endif
46
47 #ifdef R2D
48 #undef R2D
49 #endif
50
51 #ifdef SQRT2
52 #undef SQRT2
53 #endif
54
55 #ifdef SQRT2INV
56 #undef SQRT2INV
57 #endif
58
59 #define PI 3.141592653589793238462643
60 #define D2R PI/180.0
61 #define R2D 180.0/PI
62 #define SQRT2 1.4142135623730950488
63 #define SQRT2INV 1.0/SQRT2
64
65 #ifdef UNDEFINED
66 #undef UNDEFINED
67 #endif
68
69 #define UNDEFINED 987654321.0e99
70 #define undefined(value) (value == UNDEFINED)
71
72 #endif // WCSLIB_WCSMATH