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palsrc/palmac.h  view on Meta::CPAN

#ifndef PALMACDEF
#define PALMACDEF

/*
*+
*  Name:
*     palmac.h

*  Purpose:
*     Macros used by the PAL library

*  Language:
*     Starlink ANSI C

*  Type of Module:
*     Include file

*  Description:
*     A collection of useful macros provided and used by the PAL library

*  Authors:
*     TIMJ: Tim Jenness (JAC, Hawaii)
*     DSB: David Berry (JAC, Hawaii)
*     {enter_new_authors_here}

*  Notes:
*

*  History:
*     2012-02-08 (TIMJ):
*        Initial version.
*        Adapted with permission from the Fortran SLALIB library.
*     2012-04-13 (DSB):
*        Added PAL__DR2H and PAL__DR2S
*     {enter_further_changes_here}

*  Copyright:
*     Copyright (C) 2012 Science and Technology Facilities Council.
*     All Rights Reserved.

*  Licence:
*     This program is free software: you can redistribute it and/or
*     modify it under the terms of the GNU Lesser General Public
*     License as published by the Free Software Foundation, either
*     version 3 of the License, or (at your option) any later
*     version.
*
*     This program 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 Lesser General Public License for more details.
*
*     You should have received a copy of the GNU Lesser General
*     License along with this program.  If not, see
*     <http://www.gnu.org/licenses/>.

*  Bugs:
*     {note_any_bugs_here}
*-
*/

/* Pi */
static const double PAL__DPI = 3.1415926535897932384626433832795028841971693993751;

/* 2Pi */
static const double PAL__D2PI = 6.2831853071795864769252867665590057683943387987502;

/* pi/2:  90 degrees in radians */
static const double PAL__DPIBY2 = 1.5707963267948966192313216916397514420985846996876;