/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2012-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
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::uniformInterpolatedDisplacementPointPatchVectorField

Description
    Interpolates pre-specified motion.

    Motion specified as pointVectorFields.

Usage
    Example:
    \verbatim
    walls
    {
        type                uniformInterpolatedDisplacement;
        value               uniform (0 0 0);
        field               wantedDisplacement;
        interpolationScheme linear;
    }
    \endverbatim

    This will scan the case for \a wantedDisplacement pointVectorFields
    and interpolate those in time (using \c linear interpolation) to
    obtain the current displacement.
    The advantage of specifying displacement in this way is that it
    automatically works through decomposePar.

SourceFiles
    uniformInterpolatedDisplacementPointPatchVectorField.C

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

#ifndef uniformInterpolatedDisplacementPointPatchVectorField_H
#define uniformInterpolatedDisplacementPointPatchVectorField_H

#include "fixedValuePointPatchField.H"

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

namespace Foam
{

class interpolationWeights;

/*---------------------------------------------------------------------------*\
    Class uniformInterpolatedDisplacementPointPatchVectorField Declaration
\*---------------------------------------------------------------------------*/

class uniformInterpolatedDisplacementPointPatchVectorField
:
    public fixedValuePointPatchField<vector>
{
    // Private data

        //- Name of displacement field
        const word fieldName_;

        const word interpolationScheme_;

        //- Times with pre-specified displacement
        wordList timeNames_;

        //- Times with pre-specified displacement
        scalarField timeVals_;

        //- User-specified interpolator
        autoPtr<interpolationWeights> interpolatorPtr_;


        //- Cached interpolation times
        labelList currentIndices_;

        //- Cached interpolation weights
        scalarField currentWeights_;

public:

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


    // Constructors

        //- Construct from patch and internal field
        uniformInterpolatedDisplacementPointPatchVectorField
        (
            const pointPatch&,
            const DimensionedField<vector, pointMesh>&
        );

        //- Construct from patch, internal field and dictionary
        uniformInterpolatedDisplacementPointPatchVectorField
        (
            const pointPatch&,
            const DimensionedField<vector, pointMesh>&,
            const dictionary&
        );

        //- Construct by mapping given patchField<vector> onto a new patch
        uniformInterpolatedDisplacementPointPatchVectorField
        (
            const uniformInterpolatedDisplacementPointPatchVectorField&,
            const pointPatch&,
            const DimensionedField<vector, pointMesh>&,
            const pointPatchFieldMapper&
        );

        //- Construct and return a clone
        virtual autoPtr<pointPatchField<vector>> clone() const
        {
            return autoPtr<pointPatchField<vector>>
            (
                new uniformInterpolatedDisplacementPointPatchVectorField
                (
                    *this
                )
            );
        }

        //- Construct as copy setting internal field reference
        uniformInterpolatedDisplacementPointPatchVectorField
        (
            const uniformInterpolatedDisplacementPointPatchVectorField&,
            const DimensionedField<vector, pointMesh>&
        );

        //- Construct and return a clone setting internal field reference
        virtual autoPtr<pointPatchField<vector>> clone
        (
            const DimensionedField<vector, pointMesh>& iF
        ) const
        {
            return autoPtr<pointPatchField<vector>>
            (
                new uniformInterpolatedDisplacementPointPatchVectorField
                (
                    *this,
                    iF
                )
            );
        }


    // Member functions

        // Evaluation functions

            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();


        //- Write
        virtual void write(Ostream&) const;
};


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

} // End namespace Foam

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

#endif

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