/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2018 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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::functionObjects::fieldCoordinateSystemTransform

Description
    Transforms a user-specified selection of fields from global Cartesian
    co-ordinates to a local co-ordinate system.  The fields are run-time
    modifiable.

    Example of function object specification:
    \verbatim
    fieldCoordinateSystemTransform1
    {
        type        fieldCoordinateSystemTransform;
        libs        ("libfieldFunctionObjects.so");
        ...
        fields
        (
            U
            UMean
            UPrime2Mean
        );

        coordinateSystem
        {
            origin  (0.001 0 0);
            coordinateRotation
            {
                type        axesRotation;
                e1      (1      0.15    0);
                e3      (0      0      -1);
            }
        }
    }
    \endverbatim

Usage
    \table
        Property     | Description             | Required    | Default value
        type         | type name: fieldCoordinateSystemTransform | yes |
        fields       | list of fields to be transformed |yes |
        coordinateSystem | local co-ordinate system | yes    |
    \endtable

See also
    Foam::functionObjects::fvMeshFunctionObject
    Foam::coordinateSystem

SourceFiles
    fieldCoordinateSystemTransform.C
    fieldCoordinateSystemTransformTemplates.C

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

#ifndef functionObjects_fieldCoordinateSystemTransform_H
#define functionObjects_fieldCoordinateSystemTransform_H

#include "fvMeshFunctionObject.H"
#include "coordinateSystem.H"

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

namespace Foam
{
namespace functionObjects
{

/*---------------------------------------------------------------------------*\
               Class fieldCoordinateSystemTransform Declaration
\*---------------------------------------------------------------------------*/

class fieldCoordinateSystemTransform
:
    public fvMeshFunctionObject
{
protected:

    // Protected data

        //- Fields to transform
        wordList fieldSet_;

        //- Co-ordinate system to transform to
        coordinateSystem coordSys_;


    // Protected Member Functions

        //- Return the name of the transformed field
        word transformFieldName(const word& fieldName) const;

        //- Transform the given field
        template<class FieldType>
        void transformField(const FieldType& field);

        //- Transform the given field if has the specified element type
        template<class Type>
        void transform(const word& fieldName);


public:

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


    // Constructors

        //- Construct from Time and dictionary
        fieldCoordinateSystemTransform
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );


    //- Destructor
    virtual ~fieldCoordinateSystemTransform();


    // Member Functions

        //- Read the input data
        virtual bool read(const dictionary&);

        //- Calculate the transformed fields
        virtual bool execute();

        //- Write the transformed fields
        virtual bool write();
};


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

} // End namespace functionObjects
} // End namespace Foam

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

#ifdef NoRepository
    #include "fieldCoordinateSystemTransformTemplates.C"
#endif

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

#endif

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