pairGAMGAgglomeration.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2011-2013 OpenFOAM Foundation
    Copyright (C) 2023 OpenCFD Ltd.
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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
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Class
    Foam::pairGAMGAgglomeration
 
Description
    Agglomerate using the pair algorithm.
 
SourceFiles
    pairGAMGAgglomeration.C
    pairGAMGAgglomerate.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef pairGAMGAgglomeration_H
#define pairGAMGAgglomeration_H
 
#include "GAMGAgglomeration.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class pairGAMGAgglomeration Declaration
\*---------------------------------------------------------------------------*/
 
class pairGAMGAgglomeration
:
    public GAMGAgglomeration
{
    // Private data
 
        //- Number of levels to merge, 1 = don't merge, 2 = merge pairs etc.
        label mergeLevels_;
 
        //- Direction of cell loop for the current level
        static bool forward_;
 
 
protected:
 
    // Protected Member Functions
 
        //- No copy construct
        pairGAMGAgglomeration(const pairGAMGAgglomeration&) = delete;
 
        //- No copy assignment
        void operator=(const pairGAMGAgglomeration&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("pair");
 
 
    // Constructors
 
        //- Construct given mesh and controls
        pairGAMGAgglomeration
        (
            const lduMesh& mesh,
            const dictionary& controlDict
        );
 
        //- Calculate and return agglomeration
        static tmp<labelField> agglomerate
        (
            label& nCoarseCells,
            const lduAddressing& fineMatrixAddressing,
            const scalarField& faceWeights
        );
 
        //- Agglomerate from a starting level. Starting level is usually 0
        //- (initial mesh) but sometimes >0 (restarting after processor
        //- agglomeration)
        virtual void agglomerate
        (
            const label nCellsInCoarsestLevel,
            const label startLevel,
            const scalarField& startFaceWeights,
            const bool doProcessorAgglomerate = true
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //