File Coverage

erfasrc/src/rx.c
Criterion Covered Total %
statement 16 16 100.0
branch n/a
condition n/a
subroutine n/a
pod n/a
total 16 16 100.0


line stmt bran cond sub pod time code
1             #include "erfa.h"
2              
3 435           void eraRx(double phi, double r[3][3])
4             /*
5             ** - - - - - -
6             ** e r a R x
7             ** - - - - - -
8             **
9             ** Rotate an r-matrix about the x-axis.
10             **
11             ** Given:
12             ** phi double angle (radians)
13             **
14             ** Given and returned:
15             ** r double[3][3] r-matrix, rotated
16             **
17             ** Notes:
18             **
19             ** 1) Calling this function with positive phi incorporates in the
20             ** supplied r-matrix r an additional rotation, about the x-axis,
21             ** anticlockwise as seen looking towards the origin from positive x.
22             **
23             ** 2) The additional rotation can be represented by this matrix:
24             **
25             ** ( 1 0 0 )
26             ** ( )
27             ** ( 0 + cos(phi) + sin(phi) )
28             ** ( )
29             ** ( 0 - sin(phi) + cos(phi) )
30             **
31             ** Copyright (C) 2013-2019, NumFOCUS Foundation.
32             ** Derived, with permission, from the SOFA library. See notes at end of file.
33             */
34             {
35             double s, c, a10, a11, a12, a20, a21, a22;
36              
37              
38 435           s = sin(phi);
39 435           c = cos(phi);
40              
41 435           a10 = c*r[1][0] + s*r[2][0];
42 435           a11 = c*r[1][1] + s*r[2][1];
43 435           a12 = c*r[1][2] + s*r[2][2];
44 435           a20 = - s*r[1][0] + c*r[2][0];
45 435           a21 = - s*r[1][1] + c*r[2][1];
46 435           a22 = - s*r[1][2] + c*r[2][2];
47              
48 435           r[1][0] = a10;
49 435           r[1][1] = a11;
50 435           r[1][2] = a12;
51 435           r[2][0] = a20;
52 435           r[2][1] = a21;
53 435           r[2][2] = a22;
54              
55 435           return;
56              
57             }
58             /*----------------------------------------------------------------------
59             **
60             **
61             ** Copyright (C) 2013-2019, NumFOCUS Foundation.
62             ** All rights reserved.
63             **
64             ** This library is derived, with permission, from the International
65             ** Astronomical Union's "Standards of Fundamental Astronomy" library,
66             ** available from http://www.iausofa.org.
67             **
68             ** The ERFA version is intended to retain identical functionality to
69             ** the SOFA library, but made distinct through different function and
70             ** file names, as set out in the SOFA license conditions. The SOFA
71             ** original has a role as a reference standard for the IAU and IERS,
72             ** and consequently redistribution is permitted only in its unaltered
73             ** state. The ERFA version is not subject to this restriction and
74             ** therefore can be included in distributions which do not support the
75             ** concept of "read only" software.
76             **
77             ** Although the intent is to replicate the SOFA API (other than
78             ** replacement of prefix names) and results (with the exception of
79             ** bugs; any that are discovered will be fixed), SOFA is not
80             ** responsible for any errors found in this version of the library.
81             **
82             ** If you wish to acknowledge the SOFA heritage, please acknowledge
83             ** that you are using a library derived from SOFA, rather than SOFA
84             ** itself.
85             **
86             **
87             ** TERMS AND CONDITIONS
88             **
89             ** Redistribution and use in source and binary forms, with or without
90             ** modification, are permitted provided that the following conditions
91             ** are met:
92             **
93             ** 1 Redistributions of source code must retain the above copyright
94             ** notice, this list of conditions and the following disclaimer.
95             **
96             ** 2 Redistributions in binary form must reproduce the above copyright
97             ** notice, this list of conditions and the following disclaimer in
98             ** the documentation and/or other materials provided with the
99             ** distribution.
100             **
101             ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
102             ** the International Astronomical Union nor the names of its
103             ** contributors may be used to endorse or promote products derived
104             ** from this software without specific prior written permission.
105             **
106             ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
107             ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
108             ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
109             ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
110             ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
111             ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
112             ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
113             ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
114             ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
115             ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
116             ** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
117             ** POSSIBILITY OF SUCH DAMAGE.
118             **
119             */