src/finiteVolume/interpolation/surfaceInterpolation/schemes/cubicUpwindFit/cubicUpwindFitPolynomial.H

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
   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 the
  13     Free Software Foundation; either version 2 of the License, or (at your
  14     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, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 Class
  26     Foam::cubicUpwindFitPolynomial
  27
  28 Description
  29     Cubic polynomial for upwind biased interpolation fitting.
  30
  31     Can be used with the UpwindFit scheme to create a cubic surface
  32     interpolation scheme
  33
  34 \*---------------------------------------------------------------------------*/
  35
  36 #ifndef cubicUpwindFitPolynomial_H
  37 #define cubicUpwindFitPolynomial_H
  38
  39 #include "vector.H"
  40
  41 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  42
  43 namespace Foam
  44 {
  45
  46 /*---------------------------------------------------------------------------*\
  47                  Class cubicUpwindFitPolynomial Declaration
  48 \*---------------------------------------------------------------------------*/
  49
  50 class cubicUpwindFitPolynomial
  51 {
  52 public:
  53
  54     // Member functions
  55
  56         static label nTerms(const direction dim)
  57         {
  58             return
  59             (
  60                 dim == 1 ? 4 :
  61                 dim == 2 ? 8 :
  62                 dim == 3 ? 14 : 0
  63             );
  64         }
  65
  66         static void addCoeffs
  67         (
  68             scalar* coeffs,
  69             const vector& d,
  70             const scalar weight,
  71             const direction dim
  72         )
  73         {
  74             register label curIdx = 0;
  75
  76             coeffs[curIdx++] = weight;
  77             coeffs[curIdx++] = weight*d.x();
  78             coeffs[curIdx++] = weight*sqr(d.x());
  79             coeffs[curIdx++] = weight*pow(d.x(),3);
  80
  81             if (dim >= 2)
  82             {
  83                 coeffs[curIdx++] = weight*d.y();
  84                 coeffs[curIdx++] = weight*d.x()*d.y();
  85                 coeffs[curIdx++] = weight*sqr(d.y());
  86                 coeffs[curIdx++] = weight*d.x()*sqr(d.y());
  87             }
  88             if (dim == 3)
  89             {
  90                 coeffs[curIdx++] = weight*d.z();
  91                 coeffs[curIdx++] = weight*d.x()*d.z();
  92                 coeffs[curIdx++] = weight*d.y()*d.z();
  93                 coeffs[curIdx++] = weight*sqr(d.z());
  94                 coeffs[curIdx++] = weight*d.x()*d.y()*d.z();
  95                 coeffs[curIdx++] = weight*d.x()*sqr(d.z());
  96             }
  97         }
  98 };
  99
 100
 101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 102
 103 } // End namespace Foam
 104
 105 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 106
 107 #endif
 108
 109 // ************************************************************************* //