sinhInterpolation.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2020-2023 FOSS GP
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License
    This file is part of OpenFOAM.

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Class
    Foam::sinhInterpolation

Description
    Updates the porosity values in topology optimization using a sinh function

InterpolationFiles
    sinhInterpolation.C

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

#ifndef sinhInterpolation_H
#define sinhInterpolation_H

#include "topOInterpolationFunction.H"

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                      Class sinhInterpolation Declaration
\*---------------------------------------------------------------------------*/

class sinhInterpolation
:
    public topOInterpolationFunction
{

private:

    // Private Data

        //- Steepness parameter
        //  High b values lead to more steep interpolations - higher contrasts.
        //  May vary in time
        autoPtr<Function1<scalar>> b_;


    // Private Member Functions

        //- No copy construct
        sinhInterpolation(const sinhInterpolation&);

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


public:

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


    // Constructors

        //- Construct from components
        sinhInterpolation
        (
            const fvMesh& mesh,
            const dictionary& dict
        );


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


    // Member Functions

        //- Interpolate argument and write to result
        virtual void interpolate
        (
            const scalarField& arg,
            scalarField& res
        ) const;

        //- Return of function with respect to the argument field
        virtual tmp<scalarField> derivative(const scalarField& arg) const;
};


} // End namespace Foam

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

#endif

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