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Diffstat (limited to 'ast/erfa/sepp.c')
| -rw-r--r-- | ast/erfa/sepp.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/ast/erfa/sepp.c b/ast/erfa/sepp.c deleted file mode 100644 index 98f2671..0000000 --- a/ast/erfa/sepp.c +++ /dev/null @@ -1,114 +0,0 @@ -#include "erfa.h" - -double eraSepp(double a[3], double b[3]) -/* -** - - - - - - - - -** e r a S e p p -** - - - - - - - - -** -** Angular separation between two p-vectors. -** -** Given: -** a double[3] first p-vector (not necessarily unit length) -** b double[3] second p-vector (not necessarily unit length) -** -** Returned (function value): -** double angular separation (radians, always positive) -** -** Notes: -** -** 1) If either vector is null, a zero result is returned. -** -** 2) The angular separation is most simply formulated in terms of -** scalar product. However, this gives poor accuracy for angles -** near zero and pi. The present algorithm uses both cross product -** and dot product, to deliver full accuracy whatever the size of -** the angle. -** -** Called: -** eraPxp vector product of two p-vectors -** eraPm modulus of p-vector -** eraPdp scalar product of two p-vectors -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double axb[3], ss, cs, s; - - -/* Sine of angle between the vectors, multiplied by the two moduli. */ - eraPxp(a, b, axb); - ss = eraPm(axb); - -/* Cosine of the angle, multiplied by the two moduli. */ - cs = eraPdp(a, b); - -/* The angle. */ - s = ((ss != 0.0) || (cs != 0.0)) ? atan2(ss, cs) : 0.0; - - return s; - -} -/*---------------------------------------------------------------------- -** -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** All rights reserved. -** -** This library is derived, with permission, from the International -** Astronomical Union's "Standards of Fundamental Astronomy" library, -** available from http://www.iausofa.org. -** -** The ERFA version is intended to retain identical functionality to -** the SOFA library, but made distinct through different function and -** file names, as set out in the SOFA license conditions. The SOFA -** original has a role as a reference standard for the IAU and IERS, -** and consequently redistribution is permitted only in its unaltered -** state. The ERFA version is not subject to this restriction and -** therefore can be included in distributions which do not support the -** concept of "read only" software. -** -** Although the intent is to replicate the SOFA API (other than -** replacement of prefix names) and results (with the exception of -** bugs; any that are discovered will be fixed), SOFA is not -** responsible for any errors found in this version of the library. -** -** If you wish to acknowledge the SOFA heritage, please acknowledge -** that you are using a library derived from SOFA, rather than SOFA -** itself. -** -** -** TERMS AND CONDITIONS -** -** Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions -** are met: -** -** 1 Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** -** 2 Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** -** 3 Neither the name of the Standards Of Fundamental Astronomy Board, -** the International Astronomical Union nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -** POSSIBILITY OF SUCH DAMAGE. -** -*/ |