FACT++  1.0
pvup.c
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1 #include "erfa.h"
2 
3 void eraPvup(double dt, double pv[2][3], double p[3])
4 /*
5 ** - - - - - - - -
6 ** e r a P v u p
7 ** - - - - - - - -
8 **
9 ** Update a pv-vector, discarding the velocity component.
10 **
11 ** Given:
12 ** dt double time interval
13 ** pv double[2][3] pv-vector
14 **
15 ** Returned:
16 ** p double[3] p-vector
17 **
18 ** Notes:
19 **
20 ** 1) "Update" means "refer the position component of the vector to a
21 ** new date dt time units from the existing date".
22 **
23 ** 2) The time units of dt must match those of the velocity.
24 **
25 ** Copyright (C) 2013-2015, NumFOCUS Foundation.
26 ** Derived, with permission, from the SOFA library. See notes at end of file.
27 */
28 {
29  p[0] = pv[0][0] + dt * pv[1][0];
30  p[1] = pv[0][1] + dt * pv[1][1];
31  p[2] = pv[0][2] + dt * pv[1][2];
32 
33  return;
34 
35 }
36 /*----------------------------------------------------------------------
37 **
38 **
39 ** Copyright (C) 2013-2015, NumFOCUS Foundation.
40 ** All rights reserved.
41 **
42 ** This library is derived, with permission, from the International
43 ** Astronomical Union's "Standards of Fundamental Astronomy" library,
44 ** available from http://www.iausofa.org.
45 **
46 ** The ERFA version is intended to retain identical functionality to
47 ** the SOFA library, but made distinct through different function and
48 ** file names, as set out in the SOFA license conditions. The SOFA
49 ** original has a role as a reference standard for the IAU and IERS,
50 ** and consequently redistribution is permitted only in its unaltered
51 ** state. The ERFA version is not subject to this restriction and
52 ** therefore can be included in distributions which do not support the
53 ** concept of "read only" software.
54 **
55 ** Although the intent is to replicate the SOFA API (other than
56 ** replacement of prefix names) and results (with the exception of
57 ** bugs; any that are discovered will be fixed), SOFA is not
58 ** responsible for any errors found in this version of the library.
59 **
60 ** If you wish to acknowledge the SOFA heritage, please acknowledge
61 ** that you are using a library derived from SOFA, rather than SOFA
62 ** itself.
63 **
64 **
65 ** TERMS AND CONDITIONS
66 **
67 ** Redistribution and use in source and binary forms, with or without
68 ** modification, are permitted provided that the following conditions
69 ** are met:
70 **
71 ** 1 Redistributions of source code must retain the above copyright
72 ** notice, this list of conditions and the following disclaimer.
73 **
74 ** 2 Redistributions in binary form must reproduce the above copyright
75 ** notice, this list of conditions and the following disclaimer in
76 ** the documentation and/or other materials provided with the
77 ** distribution.
78 **
79 ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
80 ** the International Astronomical Union nor the names of its
81 ** contributors may be used to endorse or promote products derived
82 ** from this software without specific prior written permission.
83 **
84 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
85 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
86 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
87 ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
88 ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
89 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
90 ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
91 ** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
92 ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
93 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
94 ** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
95 ** POSSIBILITY OF SUCH DAMAGE.
96 **
97 */
eraPvup
void eraPvup(double dt, double pv[2][3], double p[3])
Definition: pvup.c:3