springRenumber.H

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/*---------------------------------------------------------------------------*\
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Class
    Foam::springRenumber

Description
    Use spring analogy - attract neighbouring cells according to the distance
    of their cell indices.

    // Maximum jump of cell indices. Is fraction of number of cells
    maxCo 0.1;

    // Limit the amount of movement; the fraction maxCo gets decreased
    // with every iteration.
    freezeFraction 0.9;

    // Maximum number of iterations
    maxIter 1000;

SourceFiles
    springRenumber.C

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

#ifndef Foam_springRenumber_H
#define Foam_springRenumber_H

#include "renumberMethod.H"

namespace Foam
{

/*---------------------------------------------------------------------------*\
                       Class springRenumber Declaration
\*---------------------------------------------------------------------------*/

class springRenumber
:
    public renumberMethod
{
    // Private Data

        const dictionary& coeffsDict_;

        const label maxIter_;

        const scalar maxCo_;

        const scalar freezeFraction_;


    // Private Member Functions

        //- The spring renumber implementation.
        //  The connections are CompactListList<label> or a labelListList.
        template<class ConnectionListListType>
        labelList renumberImpl
        (
            const ConnectionListListType& cellCellAddressing
        ) const;

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

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


public:

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


    // Constructors

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


    //- Destructor
    virtual ~springRenumber() = 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&
        ) 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

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