FreeFOAM The Cross-Platform CFD Toolkit
Hosted by SourceForge:
Get FreeFOAM at SourceForge.net.
            Fast, secure and Free Open Source software downloads

quadraticLinearFitPolynomial.H

Go to the documentation of this file.
00001 /*---------------------------------------------------------------------------*\
00002   =========                 |
00003   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
00004    \\    /   O peration     |
00005     \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
00006      \\/     M anipulation  |
00007 -------------------------------------------------------------------------------
00008 License
00009     This file is part of OpenFOAM.
00010 
00011     OpenFOAM is free software: you can redistribute it and/or modify it
00012     under the terms of the GNU General Public License as published by
00013     the Free Software Foundation, either version 3 of the License, or
00014     (at your option) any later version.
00015 
00016     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
00017     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00018     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
00019     for more details.
00020 
00021     You should have received a copy of the GNU General Public License
00022     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
00023 
00024 Class
00025     Foam::quadraticLinearFitPolynomial
00026 
00027 Description
00028     Quadratic/linear polynomial for interpolation fitting:
00029         quadratic normal to the face,
00030         linear in the plane of the face for consistency with 2nd-order Gauss.
00031 
00032     Can be used with the CentredFit scheme to create a quadratic surface
00033     interpolation scheme
00034 
00035 \*---------------------------------------------------------------------------*/
00036 
00037 #ifndef quadraticLinearFitPolynomial_H
00038 #define quadraticLinearFitPolynomial_H
00039 
00040 #include <OpenFOAM/vector.H>
00041 
00042 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00043 
00044 namespace Foam
00045 {
00046 
00047 /*---------------------------------------------------------------------------*\
00048                            Class quadraticLinearFitPolynomial Declaration
00049 \*---------------------------------------------------------------------------*/
00050 
00051 class quadraticLinearFitPolynomial
00052 {
00053 public:
00054 
00055     // Member functions
00056 
00057         static label nTerms(const direction dim)
00058         {
00059             return
00060             (
00061                 dim == 1 ? 3 :
00062                 dim == 2 ? 5 :
00063                 dim == 3 ? 7 : 0
00064             );
00065         }
00066 
00067         static void addCoeffs
00068         (
00069             scalar* coeffs,
00070             const vector& d,
00071             const scalar weight,
00072             const direction dim
00073         )
00074         {
00075             register label curIdx = 0;
00076 
00077             coeffs[curIdx++] = weight;
00078             coeffs[curIdx++] = weight*d.x();
00079             coeffs[curIdx++] = weight*sqr(d.x());
00080 
00081             if (dim >= 2)
00082             {
00083                 coeffs[curIdx++] = weight*d.y();
00084                 coeffs[curIdx++] = weight*d.x()*d.y();
00085             }
00086             if (dim == 3)
00087             {
00088                 coeffs[curIdx++] = weight*d.z();
00089                 coeffs[curIdx++] = weight*d.x()*d.z();
00090             }
00091         }
00092 };
00093 
00094 
00095 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00096 
00097 } // End namespace Foam
00098 
00099 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00100 
00101 #endif
00102 
00103 // ************************ vim: set sw=4 sts=4 et: ************************ //
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines