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author | William Joye <wjoye@cfa.harvard.edu> | 2018-01-09 19:06:17 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2018-01-09 19:06:17 (GMT) |
commit | d64cf9c0bd23e752867b149be636d1bbd4501cf4 (patch) | |
tree | ec600c696fe3dbf15f166d22a95c47a1c0867509 /ast/wcstrig.c | |
parent | 62d555c8f989ab6eb026387cbf52bb46ebb2dfea (diff) | |
download | blt-d64cf9c0bd23e752867b149be636d1bbd4501cf4.zip blt-d64cf9c0bd23e752867b149be636d1bbd4501cf4.tar.gz blt-d64cf9c0bd23e752867b149be636d1bbd4501cf4.tar.bz2 |
update ast 8.6.2
Diffstat (limited to 'ast/wcstrig.c')
-rw-r--r-- | ast/wcstrig.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/ast/wcstrig.c b/ast/wcstrig.c deleted file mode 100644 index d3ba400..0000000 --- a/ast/wcstrig.c +++ /dev/null @@ -1,189 +0,0 @@ -/*============================================================================ -* -* WCSLIB - an implementation of the FITS WCS proposal. -* Copyright (C) 1995-2002, Mark Calabretta -* -* This library is free software; you can redistribute it and/or modify it -* under the terms of the GNU Library General Public License as published -* by the Free Software Foundation; either version 2 of the License, or (at -* your option) any later version. -* -* This library is distributed in the hope that it will be useful, but -* WITHOUT ANY WARRANTY; without even the implied warranty of -* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library -* General Public License for more details. -* -* You should have received a copy of the GNU Library General Public License -* along with this library; if not, write to the Free Software Foundation, -* Inc., 51 Franklin Street,Fifth Floor, Boston, MA 02110-1301, USA -* -* Correspondence concerning WCSLIB may be directed to: -* Internet email: mcalabre@atnf.csiro.au -* Postal address: Dr. Mark Calabretta, -* Australia Telescope National Facility, -* P.O. Box 76, -* Epping, NSW, 2121, -* AUSTRALIA -* -*============================================================================= -* -* This version of wcstrig.c is based on the version in wcslib-2.9, but has -* been modified in the following ways by the Starlink project (e-mail: -* ussc@star.rl.ac.uk): -* - Support for non-ANSI C "const" class removed -* - Changed names of projection functions and degrees trig functions -* to avoid clashes with wcslib. -*============================================================================= -* -* The functions defined herein are trigonometric or inverse trigonometric -* functions which take or return angular arguments in decimal degrees. -* -* $Id$ -*---------------------------------------------------------------------------*/ - -#include <math.h> -#include "wcsmath.h" -#include "wcstrig.h" - -double astCosd(angle) - -const double angle; - -{ - double resid; - - resid = fabs(fmod(angle,360.0)); - if (resid == 0.0) { - return 1.0; - } else if (resid == 90.0) { - return 0.0; - } else if (resid == 180.0) { - return -1.0; - } else if (resid == 270.0) { - return 0.0; - } - - return cos(angle*D2R); -} - -/*--------------------------------------------------------------------------*/ - -double astSind(angle) - -const double angle; - -{ - double resid; - - resid = fmod(angle-90.0,360.0); - if (resid == 0.0) { - return 1.0; - } else if (resid == 90.0) { - return 0.0; - } else if (resid == 180.0) { - return -1.0; - } else if (resid == 270.0) { - return 0.0; - } - - return sin(angle*D2R); -} - -/*--------------------------------------------------------------------------*/ - -double astTand(angle) - -const double angle; - -{ - double resid; - - resid = fmod(angle,360.0); - if (resid == 0.0 || fabs(resid) == 180.0) { - return 0.0; - } else if (resid == 45.0 || resid == 225.0) { - return 1.0; - } else if (resid == -135.0 || resid == -315.0) { - return -1.0; - } - - return tan(angle*D2R); -} - -/*--------------------------------------------------------------------------*/ - -double astACosd(v) - -const double v; - -{ - if (v >= 1.0) { - if (v-1.0 < WCSTRIG_TOL) return 0.0; - } else if (v == 0.0) { - return 90.0; - } else if (v <= -1.0) { - if (v+1.0 > -WCSTRIG_TOL) return 180.0; - } - - return acos(v)*R2D; -} - -/*--------------------------------------------------------------------------*/ - -double astASind(v) - -const double v; - -{ - if (v <= -1.0) { - if (v+1.0 > -WCSTRIG_TOL) return -90.0; - } else if (v == 0.0) { - return 0.0; - } else if (v >= 1.0) { - if (v-1.0 < WCSTRIG_TOL) return 90.0; - } - - return asin(v)*R2D; -} - -/*--------------------------------------------------------------------------*/ - -double astATand(v) - -const double v; - -{ - if (v == -1.0) { - return -45.0; - } else if (v == 0.0) { - return 0.0; - } else if (v == 1.0) { - return 45.0; - } - - return atan(v)*R2D; -} - -/*--------------------------------------------------------------------------*/ - -double astATan2d(y, x) - -const double x, y; - -{ - if (y == 0.0) { - if (x >= 0.0) { - return 0.0; - } else if (x < 0.0) { - return 180.0; - } - } else if (x == 0.0) { - if (y > 0.0) { - return 90.0; - } else if (y < 0.0) { - return -90.0; - } - } - - return atan2(y,x)*R2D; -} |