103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2011-2015 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::quadraticLinearFitPolynomial
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Description
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Quadratic/linear polynomial for interpolation fitting:
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quadratic normal to the face,
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linear in the plane of the face for consistency with 2nd-order Gauss.
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Can be used with the CentredFit scheme to create a quadratic surface
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interpolation scheme
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\*---------------------------------------------------------------------------*/
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#ifndef quadraticLinearFitPolynomial_H
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#define quadraticLinearFitPolynomial_H
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#include "vector.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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/*---------------------------------------------------------------------------*\
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Class quadraticLinearFitPolynomial Declaration
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\*---------------------------------------------------------------------------*/
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class quadraticLinearFitPolynomial
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{
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public:
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// Member functions
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static label nTerms(const direction dim)
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{
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return
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(
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dim == 1 ? 3 :
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dim == 2 ? 5 :
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dim == 3 ? 7 : 0
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);
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}
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static void addCoeffs
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(
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scalar* coeffs,
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const vector& d,
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const scalar weight,
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const direction dim
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)
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{
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label curIdx = 0;
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coeffs[curIdx++] = weight;
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coeffs[curIdx++] = weight*d.x();
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coeffs[curIdx++] = weight*sqr(d.x());
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if (dim >= 2)
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{
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coeffs[curIdx++] = weight*d.y();
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coeffs[curIdx++] = weight*d.x()*d.y();
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}
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if (dim == 3)
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{
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coeffs[curIdx++] = weight*d.z();
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coeffs[curIdx++] = weight*d.x()*d.z();
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}
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}
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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