FACT++  1.0
pdp.c
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1 #include "erfa.h"
2 
3 double eraPdp(double a[3], double b[3])
4 /*
5 ** - - - - - - -
6 ** e r a P d p
7 ** - - - - - - -
8 **
9 ** p-vector inner (=scalar=dot) product.
10 **
11 ** Given:
12 ** a double[3] first p-vector
13 ** b double[3] second p-vector
14 **
15 ** Returned (function value):
16 ** double a . b
17 **
18 ** Copyright (C) 2013-2015, NumFOCUS Foundation.
19 ** Derived, with permission, from the SOFA library. See notes at end of file.
20 */
21 {
22  double w;
23 
24  w = a[0] * b[0]
25  + a[1] * b[1]
26  + a[2] * b[2];
27 
28  return w;
29 
30 }
31 /*----------------------------------------------------------------------
32 **
33 **
34 ** Copyright (C) 2013-2015, NumFOCUS Foundation.
35 ** All rights reserved.
36 **
37 ** This library is derived, with permission, from the International
38 ** Astronomical Union's "Standards of Fundamental Astronomy" library,
39 ** available from http://www.iausofa.org.
40 **
41 ** The ERFA version is intended to retain identical functionality to
42 ** the SOFA library, but made distinct through different function and
43 ** file names, as set out in the SOFA license conditions. The SOFA
44 ** original has a role as a reference standard for the IAU and IERS,
45 ** and consequently redistribution is permitted only in its unaltered
46 ** state. The ERFA version is not subject to this restriction and
47 ** therefore can be included in distributions which do not support the
48 ** concept of "read only" software.
49 **
50 ** Although the intent is to replicate the SOFA API (other than
51 ** replacement of prefix names) and results (with the exception of
52 ** bugs; any that are discovered will be fixed), SOFA is not
53 ** responsible for any errors found in this version of the library.
54 **
55 ** If you wish to acknowledge the SOFA heritage, please acknowledge
56 ** that you are using a library derived from SOFA, rather than SOFA
57 ** itself.
58 **
59 **
60 ** TERMS AND CONDITIONS
61 **
62 ** Redistribution and use in source and binary forms, with or without
63 ** modification, are permitted provided that the following conditions
64 ** are met:
65 **
66 ** 1 Redistributions of source code must retain the above copyright
67 ** notice, this list of conditions and the following disclaimer.
68 **
69 ** 2 Redistributions in binary form must reproduce the above copyright
70 ** notice, this list of conditions and the following disclaimer in
71 ** the documentation and/or other materials provided with the
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73 **
74 ** 3 Neither the name of the Standards Of Fundamental Astronomy Board,
75 ** the International Astronomical Union nor the names of its
76 ** contributors may be used to endorse or promote products derived
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78 **
79 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
80 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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82 ** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
83 ** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
84 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
85 ** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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92 */
eraPdp
double eraPdp(double a[3], double b[3])
Definition: pdp.c:3