CuthillMcKeeRenumber.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2022 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
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Class
    Foam::CuthillMcKeeRenumber

Description
    Cuthill-McKee renumbering

SourceFiles
    CuthillMcKeeRenumber.C

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

#ifndef Foam_CuthillMcKeeRenumber_H
#define Foam_CuthillMcKeeRenumber_H

#include "renumberMethod.H"

namespace Foam
{

/*---------------------------------------------------------------------------*\
                   Class CuthillMcKeeRenumber Declaration
\*---------------------------------------------------------------------------*/

class CuthillMcKeeRenumber
:
    public renumberMethod
{
    // Private Data

        const bool reverse_;


    // Private Member Functions

        //- No copy construct
        CuthillMcKeeRenumber(const CuthillMcKeeRenumber&) = delete;

        //- No copy assignment
        void operator=(const CuthillMcKeeRenumber&) = delete;


public:

    //- Runtime type information
    TypeName("CuthillMcKee");


    // Constructors

        //- Construct given the renumber dictionary
        explicit CuthillMcKeeRenumber(const dictionary& dict);


    //- Destructor
    virtual ~CuthillMcKeeRenumber() = default;


    // Member Functions

        //- Return the order in which cells need to be visited
        //- (ie. from ordered back to original cell label).
        //  This is only defined for geometric renumberMethods.
        virtual labelList renumber(const pointField&) const
        {
            NotImplemented;
            return labelList();
        }

        //- Return the order in which cells need to be visited
        //- (ie. from ordered back to original cell label).
        //  Use the mesh connectivity (if needed)
        virtual labelList renumber
        (
            const polyMesh& mesh,
            const pointField& cc
        ) const;

        //- Return the order in which cells need to be visited
        //- (ie. from ordered back to original cell label).
        //  Connectivity in losort addressing (= neighbour + offsets into
        //  neighbour)
        virtual labelList renumber
        (
            const labelList& cellCells,
            const labelList& offsets,
            const pointField& cc
        ) const;

        //- Return the order in which cells need to be visited
        //- (ie. from ordered back to original cell label).
        virtual labelList renumber
        (
            const CompactListList<label>& cellCells,
            const pointField& cellCentres
        ) const;

        //- Return the order in which cells need to be visited
        //- (ie. from ordered back to original cell label).
        //  The connectivity is equal to mesh.cellCells() except
        //  - the connections are across coupled patches
        virtual labelList renumber
        (
            const labelListList& cellCells,
            const pointField& cellCentres
        ) const;
};


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

} // End namespace Foam

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

#endif

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