1 /*============================================================================ 2 WCSLIB 7.3 - an implementation of the FITS WCS standard. 3 Copyright (C) 1995-2020, 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 Direct correspondence concerning WCSLIB to mark@calabretta.id.au 21 22 Author: Mark Calabretta, Australia Telescope National Facility, CSIRO. 23 http://www.atnf.csiro.au/people/Mark.Calabretta 24 $Id: wcsmath.h,v 7.3.1.2 2020/08/17 11:19:09 mcalabre Exp mcalabre $ 25 *============================================================================= 26 * 27 * WCSLIB 7.3 - C routines that implement the FITS World Coordinate System 28 * (WCS) standard. Refer to the README file provided with WCSLIB for an 29 * overview of the library. 30 * 31 * 32 * Summary of wcsmath.h 33 * -------------------- 34 * Definition of mathematical constants used by WCSLIB. 35 * 36 *===========================================================================*/ 37 38 #ifndef WCSLIB_WCSMATH 39 #define WCSLIB_WCSMATH 40 41 #ifdef PI 42 #undef PI 43 #endif 44 45 #ifdef D2R 46 #undef D2R 47 #endif 48 49 #ifdef R2D 50 #undef R2D 51 #endif 52 53 #ifdef SQRT2 54 #undef SQRT2 55 #endif 56 57 #ifdef SQRT2INV 58 #undef SQRT2INV 59 #endif 60 61 #define PI 3.141592653589793238462643 62 #define D2R PI/180.0 63 #define R2D 180.0/PI 64 #define SQRT2 1.4142135623730950488 65 #define SQRT2INV 1.0/SQRT2 66 67 #ifdef UNDEFINED 68 #undef UNDEFINED 69 #endif 70 71 #define UNDEFINED 987654321.0e99 72 #define undefined(value) (value == UNDEFINED) 73 74 #endif // WCSLIB_WCSMATH 75