source: trunk/FACT++/erfa/src/pm.c@ 18679

Last change on this file since 18679 was 18348, checked in by tbretz, 9 years ago
File size: 3.3 KB
Line 
1#include "erfa.h"
2
3double eraPm(double p[3])
4/*
5** - - - - - -
6** e r a P m
7** - - - - - -
8**
9** Modulus of p-vector.
10**
11** Given:
12** p double[3] p-vector
13**
14** Returned (function value):
15** double modulus
16**
17** Copyright (C) 2013-2015, NumFOCUS Foundation.
18** Derived, with permission, from the SOFA library. See notes at end of file.
19*/
20{
21 return sqrt( p[0]*p[0] + p[1]*p[1] + p[2]*p[2] );
22
23}
24/*----------------------------------------------------------------------
25**
26**
27** Copyright (C) 2013-2015, NumFOCUS Foundation.
28** All rights reserved.
29**
30** This library is derived, with permission, from the International
31** Astronomical Union's "Standards of Fundamental Astronomy" library,
32** available from http://www.iausofa.org.
33**
34** The ERFA version is intended to retain identical functionality to
35** the SOFA library, but made distinct through different function and
36** file names, as set out in the SOFA license conditions. The SOFA
37** original has a role as a reference standard for the IAU and IERS,
38** and consequently redistribution is permitted only in its unaltered
39** state. The ERFA version is not subject to this restriction and
40** therefore can be included in distributions which do not support the
41** concept of "read only" software.
42**
43** Although the intent is to replicate the SOFA API (other than
44** replacement of prefix names) and results (with the exception of
45** bugs; any that are discovered will be fixed), SOFA is not
46** responsible for any errors found in this version of the library.
47**
48** If you wish to acknowledge the SOFA heritage, please acknowledge
49** that you are using a library derived from SOFA, rather than SOFA
50** itself.
51**
52**
53** TERMS AND CONDITIONS
54**
55** Redistribution and use in source and binary forms, with or without
56** modification, are permitted provided that the following conditions
57** are met:
58**
59** 1 Redistributions of source code must retain the above copyright
60** notice, this list of conditions and the following disclaimer.
61**
62** 2 Redistributions in binary form must reproduce the above copyright
63** notice, this list of conditions and the following disclaimer in
64** the documentation and/or other materials provided with the
65** distribution.
66**
67** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
68** the International Astronomical Union nor the names of its
69** contributors may be used to endorse or promote products derived
70** from this software without specific prior written permission.
71**
72** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
73** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
74** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
75** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
76** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
77** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
78** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
79** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
80** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
81** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
82** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
83** POSSIBILITY OF SUCH DAMAGE.
84**
85*/
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