source: trunk/FACT++/erfa/src/rxp.c@ 18921

Last change on this file since 18921 was 18921, checked in by tbretz, 7 years ago
Updated to ERFA 1.4.0
File size: 3.7 KB
Line 
1#include "erfa.h"
2
3void eraRxp(double r[3][3], double p[3], double rp[3])
4/*
5** - - - - - - -
6** e r a R x p
7** - - - - - - -
8**
9** Multiply a p-vector by an r-matrix.
10**
11** Given:
12** r double[3][3] r-matrix
13** p double[3] p-vector
14**
15** Returned:
16** rp double[3] r * p
17**
18** Note:
19** It is permissible for p and rp to be the same array.
20**
21** Called:
22** eraCp copy p-vector
23**
24** Copyright (C) 2013-2017, NumFOCUS Foundation.
25** Derived, with permission, from the SOFA library. See notes at end of file.
26*/
27{
28 double w, wrp[3];
29 int i, j;
30
31
32/* Matrix r * vector p. */
33 for (j = 0; j < 3; j++) {
34 w = 0.0;
35 for (i = 0; i < 3; i++) {
36 w += r[j][i] * p[i];
37 }
38 wrp[j] = w;
39 }
40
41/* Return the result. */
42 eraCp(wrp, rp);
43
44 return;
45
46}
47/*----------------------------------------------------------------------
48**
49**
50** Copyright (C) 2013-2017, NumFOCUS Foundation.
51** All rights reserved.
52**
53** This library is derived, with permission, from the International
54** Astronomical Union's "Standards of Fundamental Astronomy" library,
55** available from http://www.iausofa.org.
56**
57** The ERFA version is intended to retain identical functionality to
58** the SOFA library, but made distinct through different function and
59** file names, as set out in the SOFA license conditions. The SOFA
60** original has a role as a reference standard for the IAU and IERS,
61** and consequently redistribution is permitted only in its unaltered
62** state. The ERFA version is not subject to this restriction and
63** therefore can be included in distributions which do not support the
64** concept of "read only" software.
65**
66** Although the intent is to replicate the SOFA API (other than
67** replacement of prefix names) and results (with the exception of
68** bugs; any that are discovered will be fixed), SOFA is not
69** responsible for any errors found in this version of the library.
70**
71** If you wish to acknowledge the SOFA heritage, please acknowledge
72** that you are using a library derived from SOFA, rather than SOFA
73** itself.
74**
75**
76** TERMS AND CONDITIONS
77**
78** Redistribution and use in source and binary forms, with or without
79** modification, are permitted provided that the following conditions
80** are met:
81**
82** 1 Redistributions of source code must retain the above copyright
83** notice, this list of conditions and the following disclaimer.
84**
85** 2 Redistributions in binary form must reproduce the above copyright
86** notice, this list of conditions and the following disclaimer in
87** the documentation and/or other materials provided with the
88** distribution.
89**
90** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
91** the International Astronomical Union nor the names of its
92** contributors may be used to endorse or promote products derived
93** from this software without specific prior written permission.
94**
95** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
96** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
97** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
98** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
99** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
100** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
101** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
102** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
103** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
104** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
105** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
106** POSSIBILITY OF SUCH DAMAGE.
107**
108*/
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