/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2012 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "gaussLaplacianScheme.H"
#include "fvMesh.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace fv
{
    makeFvLaplacianScheme(gaussLaplacianScheme)
}
}

#define declareFvmLaplacianScalarGamma(Type)                                 \
                                                                             \
template<>                                                                   \
Foam::tmp<Foam::fvMatrix<Foam::Type> >                                       \
Foam::fv::gaussLaplacianScheme<Foam::Type, Foam::scalar>::fvmLaplacian       \
(                                                                            \
    const GeometricField<scalar, fvsPatchField, surfaceMesh>& gamma,         \
    const GeometricField<Type, fvPatchField, volMesh>& vf                    \
)                                                                            \
{                                                                            \
    const fvMesh& mesh = this->mesh();                                       \
                                                                             \
    GeometricField<scalar, fvsPatchField, surfaceMesh> gammaMagSf            \
    (                                                                        \
        gamma*mesh.magSf()                                                   \
    );                                                                       \
                                                                             \
    tmp<fvMatrix<Type> > tfvm = fvmLaplacianUncorrected                      \
    (                                                                        \
        gammaMagSf,                                                          \
        this->tsnGradScheme_().deltaCoeffs(vf),                              \
        vf                                                                   \
    );                                                                       \
    fvMatrix<Type>& fvm = tfvm();                                            \
                                                                             \
    if (this->tsnGradScheme_().corrected())                                  \
    {                                                                        \
        if (mesh.fluxRequired(vf.name()))                                    \
        {                                                                    \
            fvm.faceFluxCorrectionPtr() = new                                \
            GeometricField<Type, fvsPatchField, surfaceMesh>                 \
            (                                                                \
                gammaMagSf*this->tsnGradScheme_().correction(vf)             \
            );                                                               \
                                                                             \
            fvm.source() -=                                                  \
                mesh.V()*                                                    \
                fvc::div                                                     \
                (                                                            \
                    *fvm.faceFluxCorrectionPtr()                             \
                )().internalField();                                         \
        }                                                                    \
        else                                                                 \
        {                                                                    \
            fvm.source() -=                                                  \
                mesh.V()*                                                    \
                fvc::div                                                     \
                (                                                            \
                    gammaMagSf*this->tsnGradScheme_().correction(vf)         \
                )().internalField();                                         \
        }                                                                    \
    }                                                                        \
                                                                             \
    return tfvm;                                                             \
}                                                                            \
                                                                             \
                                                                             \
template<>                                                                   \
Foam::tmp<Foam::GeometricField<Foam::Type, Foam::fvPatchField, Foam::volMesh> >\
Foam::fv::gaussLaplacianScheme<Foam::Type, Foam::scalar>::fvcLaplacian       \
(                                                                            \
    const GeometricField<scalar, fvsPatchField, surfaceMesh>& gamma,         \
    const GeometricField<Type, fvPatchField, volMesh>& vf                    \
)                                                                            \
{                                                                            \
    const fvMesh& mesh = this->mesh();                                       \
                                                                             \
    tmp<GeometricField<Type, fvPatchField, volMesh> > tLaplacian             \
    (                                                                        \
        fvc::div(gamma*this->tsnGradScheme_().snGrad(vf)*mesh.magSf())       \
    );                                                                       \
                                                                             \
    tLaplacian().rename("laplacian(" + gamma.name() + ',' + vf.name() + ')');\
                                                                             \
    return tLaplacian;                                                       \
}


declareFvmLaplacianScalarGamma(scalar);
declareFvmLaplacianScalarGamma(vector);
declareFvmLaplacianScalarGamma(sphericalTensor);
declareFvmLaplacianScalarGamma(symmTensor);
declareFvmLaplacianScalarGamma(tensor);


// ************************************************************************* //
