WCSLIB 4.25.1

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wcsmath.h
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1 /*============================================================================
2
3 WCSLIB 4.25 - an implementation of the FITS WCS standard.
4 Copyright (C) 1995-2015, Mark Calabretta
5
6 This file is part of WCSLIB.
7
8 WCSLIB is free software: you can redistribute it and/or modify it under the
9 terms of the GNU Lesser General Public License as published by the Free
10 Software Foundation, either version 3 of the License, or (at your option)
11 any later version.
12
13 WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
16 more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with WCSLIB. If not, see http://www.gnu.org/licenses.
20
21 Direct correspondence concerning WCSLIB to mark@calabretta.id.au
22
23 Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
24 http://www.atnf.csiro.au/people/Mark.Calabretta
25 $Id: wcsmath.h,v 4.25.1.2 2015/01/06 01:01:06 mcalabre Exp mcalabre $
26 *=============================================================================
27 *
28 * Summary of wcsmath.h
29 * --------------------
30 * Definition of mathematical constants used by WCSLIB.
31 *
32 *===========================================================================*/
33
34 #ifndef WCSLIB_WCSMATH
35 #define WCSLIB_WCSMATH
36
37 #ifdef PI
38 #undef PI
39 #endif
40
41 #ifdef D2R
42 #undef D2R
43 #endif
44
45 #ifdef R2D
46 #undef R2D
47 #endif
48
49 #ifdef SQRT2
50 #undef SQRT2
51 #endif
52
53 #ifdef SQRT2INV
54 #undef SQRT2INV
55 #endif
56
57 #define PI 3.141592653589793238462643
58 #define D2R PI/180.0
59 #define R2D 180.0/PI
60 #define SQRT2 1.4142135623730950488
61 #define SQRT2INV 1.0/SQRT2
62
63 #ifdef UNDEFINED
64 #undef UNDEFINED
65 #endif
66
67 #define UNDEFINED 987654321.0e99
68 #define undefined(value) (value == UNDEFINED)
69
70 #endif /* WCSLIB_WCSMATH */