quadraticFitPolynomial.H
Go to the documentation of this file.
1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration | Website: https://openfoam.org
5  \\ / A nd | Copyright (C) 2011-2020 OpenFOAM Foundation
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
8 License
9  This file is part of OpenFOAM.
10 
11  OpenFOAM is free software: you can redistribute it and/or modify it
12  under the terms of the GNU General Public License as published by
13  the Free Software Foundation, either version 3 of the License, or
14  (at your option) any later version.
15 
16  OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19  for more details.
20 
21  You should have received a copy of the GNU General Public License
22  along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23 
24 Class
25  Foam::quadraticFitPolynomial
26 
27 Description
28  Quadratic polynomial for centred interpolation fitting.
29 
30  Can be used with the CentredFit scheme to create a quadratic surface
31  interpolation scheme
32 
33 \*---------------------------------------------------------------------------*/
34 
35 #ifndef quadraticFitPolynomial_H
36 #define quadraticFitPolynomial_H
37 
38 #include "vector.H"
39 
40 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
41 
42 namespace Foam
43 {
44 
45 /*---------------------------------------------------------------------------*\
46  Class quadraticFitPolynomial 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 ? 3 :
60  dim == 2 ? 6 :
61  dim == 3 ? 9 : 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  coeffs[curIdx++] = weight*sqr(d.x());
78 
79  if (dim >= 2)
80  {
81  coeffs[curIdx++] = weight*d.y();
82  coeffs[curIdx++] = weight*d.x()*d.y();
83  coeffs[curIdx++] = weight*sqr(d.y());
84  }
85  if (dim == 3)
86  {
87  coeffs[curIdx++] = weight*d.z();
88  coeffs[curIdx++] = weight*d.x()*d.z();
89  coeffs[curIdx++] = weight*sqr(d.z());
90  }
91  }
92 };
93 
94 
95 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
96 
97 } // End namespace Foam
98 
99 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
100 
101 #endif
102 
103 // ************************************************************************* //
dimensionedSymmTensor sqr(const dimensionedVector &dv)
uint8_t direction
Definition: direction.H:45
const Cmpt & z() const
Definition: VectorI.H:87
static void addCoeffs(scalar *coeffs, const vector &d, const scalar weight, const direction dim)
const Cmpt & y() const
Definition: VectorI.H:81
const Cmpt & x() const
Definition: VectorI.H:75
static label nTerms(const direction dim)
Namespace for OpenFOAM.
Quadratic polynomial for centred interpolation fitting.