biLinearFitPolynomial.H
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1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration |
5  \\ / A nd | Copyright (C) 2011-2015 OpenFOAM Foundation
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
8 License
9  This file is part of OpenFOAM.
10 
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14  (at your option) any later version.
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22  along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23 
24 Class
25  Foam::biLinearFitPolynomial
26 
27 Description
28  BiLinear polynomial for interpolation fitting.
29 
30  Can be used with the CentredFit scheme to create a biLinear surface
31  interpolation scheme
32 
33 \*---------------------------------------------------------------------------*/
34 
35 #ifndef biLinearFitPolynomial_H
36 #define biLinearFitPolynomial_H
37 
38 #include "vector.H"
39 
40 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
41 
42 namespace Foam
43 {
44 
45 /*---------------------------------------------------------------------------*\
46  Class biLinearFitPolynomial Declaration
47 \*---------------------------------------------------------------------------*/
48 
50 {
51 public:
52 
53  // Member functions
54 
55  static label nTerms(const direction dim)
56  {
57  return
58  (
59  dim == 1 ? 2 :
60  dim == 2 ? 4 :
61  dim == 3 ? 6 : 0
62  );
63  }
64 
65  static void addCoeffs
66  (
67  scalar* coeffs,
68  const vector& d,
69  const scalar weight,
70  const direction dim
71  )
72  {
73  label curIdx = 0;
74 
75  coeffs[curIdx++] = weight;
76  coeffs[curIdx++] = weight*d.x();
77 
78  if (dim >= 2)
79  {
80  coeffs[curIdx++] = weight*d.y();
81  coeffs[curIdx++] = weight*d.x()*d.y();
82  }
83  if (dim == 3)
84  {
85  coeffs[curIdx++] = weight*d.z();
86  coeffs[curIdx++] = weight*d.x()*d.z();
87  }
88  }
89 };
90 
91 
92 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
93 
94 } // End namespace Foam
95 
96 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
97 
98 #endif
99 
100 // ************************************************************************* //
unsigned char direction
Definition: direction.H:43
intWM_LABEL_SIZE_t label
A label is an int32_t or int64_t as specified by the pre-processor macro WM_LABEL_SIZE.
Definition: label.H:59
Namespace for OpenFOAM.
static void addCoeffs(scalar *coeffs, const vector &d, const scalar weight, const direction dim)
static label nTerms(const direction dim)
const Cmpt & y() const
Definition: VectorI.H:71
BiLinear polynomial for interpolation fitting.
const Cmpt & x() const
Definition: VectorI.H:65
const Cmpt & z() const
Definition: VectorI.H:77