File indexing completed on 2024-04-28 03:42:51

 /*
     SPDX-FileCopyrightText: 2011 Akarsh Simha <akarshsimha@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef ANGCONVERSION_H
 #define ANGCONVERSION_H
 
 #include <math.h> /* For M_PI */
 
 /* Angle conversion macros */
 #define RADPERDEG (M_PI / 180.0) /* Number of radians in a degree */
 
 /* Basic conversions between Degrees, Hours and Radians */
 inline double deg2rad(double x)
 {
     return (x * RADPERDEG);
 }
 inline double rad2deg(double x)
 {
     return (x / RADPERDEG);
 }
 inline double hour2deg(double x)
 {
     return (x * 15.0);
 }
 inline double deg2hour(double x)
 {
     return (x / 15.0);
 }
 inline double hour2rad(double x)
 {
     return deg2rad(hour2deg(x));
 }
 inline double rad2hour(double x)
 {
     return deg2hour(rad2deg(x));
 }
 
 /* Convert degrees to arcminutes or arcseconds and back */
 inline double deg2arcsec(double x)
 {
     return (x * 3600.0);
 }
 inline double arcsec2deg(double x)
 {
     return (x / 3600.0);
 }
 inline double deg2arcmin(double x)
 {
     return (x * 60.0);
 }
 inline double arcmin2deg(double x)
 {
     return (x / 60.0);
 }
 
 /* The following are redundant, but anyway */
 inline double hour2sec(double x)
 {
     return (x * 3600.0);
 }
 inline double sec2hour(double x)
 {
     return (x / 3600.0);
 }
 inline double hour2min(double x)
 {
     return (x * 60.0);
 }
 inline double min2hour(double x)
 {
     return (x / 60.0);
 }
 
 /* Convert DMS / HMS to Degrees / Hours */
 inline double dms2deg(double d, double m, double s)
 {
     return (d + m / 60.0 + s / 3600.0);
 }
 inline double hms2hour(double h, double m, double s)
 {
     return (h + m / 60.0 + s / 3600.0);
 }
 
 void deg2dms(double D, int *d, int *m, float *s)
 {
     *d = (int)D;
     *m = (int)((D - *d) * 60);
     *s = (int)((D - *d) * 3600 - (*m * 60));
 }
 
 void hour2hms(double H, int *h, int *m, float *s) /* Another redundant function */
 {
     *h = (int)H;
     *m = (int)((H - *h) * 60);
     *s = (int)((H - *h) * 3600 - (*m * 60));
 }
 
 #endif