#include "sofam.h" void iauA2af(int ndp, double angle, char *sign, int idmsf[4]) /* ** - - - - - - - - ** i a u A 2 a f ** - - - - - - - - ** ** Decompose radians into degrees, arcminutes, arcseconds, fraction. ** ** This function is part of the International Astronomical Union's ** SOFA (Standards Of Fundamental Astronomy) software collection. ** ** Status: vector/matrix support function. ** ** Given: ** ndp int resolution (Note 1) ** angle double angle in radians ** ** Returned: ** sign char '+' or '-' ** idmsf int[4] degrees, arcminutes, arcseconds, fraction ** ** Called: ** iauD2tf decompose days to hms ** ** Notes: ** ** 1) The argument ndp is interpreted as follows: ** ** ndp resolution ** : ...0000 00 00 ** -7 1000 00 00 ** -6 100 00 00 ** -5 10 00 00 ** -4 1 00 00 ** -3 0 10 00 ** -2 0 01 00 ** -1 0 00 10 ** 0 0 00 01 ** 1 0 00 00.1 ** 2 0 00 00.01 ** 3 0 00 00.001 ** : 0 00 00.000... ** ** 2) The largest positive useful value for ndp is determined by the ** size of angle, the format of doubles on the target platform, and ** the risk of overflowing idmsf[3]. On a typical platform, for ** angle up to 2pi, the available floating-point precision might ** correspond to ndp=12. However, the practical limit is typically ** ndp=9, set by the capacity of a 32-bit int, or ndp=4 if int is ** only 16 bits. ** ** 3) The absolute value of angle may exceed 2pi. In cases where it ** does not, it is up to the caller to test for and handle the ** case where angle is very nearly 2pi and rounds up to 360 degrees, ** by testing for idmsf[0]=360 and setting idmsf[0-3] to zero. ** ** This revision: 2008 May 27 ** ** SOFA release 2009-12-31 ** ** Copyright (C) 2009 IAU SOFA Review Board. See notes at end. */ { /* Hours to degrees * radians to turns */ const double F = 15.0 / D2PI; /* Scale then use days to h,m,s function. */ iauD2tf(ndp, angle*F, sign, idmsf); return; /*---------------------------------------------------------------------- ** ** Copyright (C) 2009 ** Standards Of Fundamental Astronomy Review Board ** of the International Astronomical Union. ** ** ===================== ** SOFA Software License ** ===================== ** ** NOTICE TO USER: ** ** BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING TERMS AND CONDITIONS ** WHICH APPLY TO ITS USE. ** ** 1. The Software is owned by the IAU SOFA Review Board ("SOFA"). ** ** 2. Permission is granted to anyone to use the SOFA software for any ** purpose, including commercial applications, free of charge and ** without payment of royalties, subject to the conditions and ** restrictions listed below. ** ** 3. You (the user) may copy and distribute SOFA source code to others, ** and use and adapt its code and algorithms in your own software, ** on a world-wide, royalty-free basis. 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