/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2020 DLR
-------------------------------------------------------------------------------
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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::multiDimPolyFunctions

Description
    base class for polynomial functions

    Original code supplied by Henning Scheufler, DLR (2019)

SourceFiles
    multiDimPolyFunctions.C

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

#ifndef multiDimPolyFunctions_H
#define multiDimPolyFunctions_H

#include "vector.H"
#include "vector2D.H"
#include "labelVector.H"
#include "scalarField.H"
#include "runTimeSelectionTables.H"

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                        Class multiDimPolyFunctions Declaration
\*---------------------------------------------------------------------------*/

class multiDimPolyFunctions
{
protected:

    // Protected Data

        //- Number of polynomial term
        label nTerms_;

        const labelVector geomDir_;

        vector geomCorrection_;

        scalarField coeffs_;

        scalarField termValues_;


public:

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

    // Declare run-time constructor selection table

    // For the dictionary constructor
    declareRunTimeSelectionTable
    (
        autoPtr,
        multiDimPolyFunctions,
        word,
        (
            const Vector<label> dirs
        ),
        (dirs)
    );


    // Constructors

        //- Construct with directions
        explicit multiDimPolyFunctions(const labelVector& dirs);


    // Selectors

        //- Select a multiDimPolyFunctions
        static autoPtr<multiDimPolyFunctions> New
        (
            const word& multiDimPolyFunctionsType,
            const labelVector& dirs
        );


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


    // Member Functions

        virtual scalar value(const vector& vec) = 0;

        virtual const scalarField& termValues(const vector& vec) = 0;

        label& nTerms()
        {
            return nTerms_;
        }

        scalarField& coeffs()
        {
            return coeffs_;
        }
};


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

} // End namespace Foam

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

#endif

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