CuthillMcKeeRenumber.C

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    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2020-2023 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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#include "CuthillMcKeeRenumber.H"
#include "addToRunTimeSelectionTable.H"
#include "bandCompression.H"
#include "globalMeshData.H"

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

namespace Foam
{
    defineTypeNameAndDebug(CuthillMcKeeRenumber, 0);

    addToRunTimeSelectionTable
    (
        renumberMethod,
        CuthillMcKeeRenumber,
        dictionary
    );
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::CuthillMcKeeRenumber::CuthillMcKeeRenumber(const dictionary& dict)
:
    renumberMethod(dict),
    reverse_
    (
        dict.optionalSubDict(typeName + "Coeffs")
            .getOrDefault("reverse", false)
    )
{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

Foam::labelList Foam::CuthillMcKeeRenumber::renumber
(
    const polyMesh& mesh,
    const pointField& points
) const
{
    CompactListList<label> cellCells;
    globalMeshData::calcCellCells
    (
        mesh,
        identity(mesh.nCells()),
        mesh.nCells(),
        false,                      // local only
        cellCells
    );

    labelList orderedToOld = meshTools::bandCompression(cellCells);

    if (reverse_)
    {
        reverse(orderedToOld);
    }

    return orderedToOld;
}


Foam::labelList Foam::CuthillMcKeeRenumber::renumber
(
    const labelList& cellCells,
    const labelList& offsets,
    const pointField& cc
) const
{
    labelList orderedToOld = meshTools::bandCompression(cellCells, offsets);

    if (reverse_)
    {
        reverse(orderedToOld);
    }

    return orderedToOld;
}


Foam::labelList Foam::CuthillMcKeeRenumber::renumber
(
    const CompactListList<label>& cellCells,
    const pointField& cc
) const
{
    labelList orderedToOld = meshTools::bandCompression(cellCells);

    if (reverse_)
    {
        reverse(orderedToOld);
    }

    return orderedToOld;
}


Foam::labelList Foam::CuthillMcKeeRenumber::renumber
(
    const labelListList& cellCells,
    const pointField& points
) const
{
    labelList orderedToOld = meshTools::bandCompression(cellCells);

    if (reverse_)
    {
        reverse(orderedToOld);
    }

    return orderedToOld;
}


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