/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 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::perfectInterface

Description
    Hack of attachDetach to couple patches when they perfectly align.
    Does not decouple. Used by stitchMesh app. Does geometric matching.

SourceFiles
    perfectInterface.C

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

#ifndef perfectInterface_H
#define perfectInterface_H

#include "polyMeshModifier.H"
#include "polyPatchID.H"
#include "ZoneIDs.H"
#include "indirectPrimitivePatch.H"

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

namespace Foam
{

// Forward declaration of classes
class Time;

/*---------------------------------------------------------------------------*\
                       Class perfectInterface Declaration
\*---------------------------------------------------------------------------*/

class perfectInterface
:
    public polyMeshModifier
{
    // Private data

        //- Master face zone ID
        faceZoneID faceZoneID_;

        //- Master patch ID
        polyPatchID masterPatchID_;

        //- Slave patch ID
        polyPatchID slavePatchID_;

        //- Tolerance used for distance comparison (fraction of minimum edge
        //  length)
        static const scalar tol_;

    // Private Member Functions

        //- Calculate face centres on patch
        static pointField calcFaceCentres(const indirectPrimitivePatch&);


        //- Disallow default bitwise copy construct
        perfectInterface(const perfectInterface&);

        //- Disallow default bitwise assignment
        void operator=(const perfectInterface&);


public:

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


    // Constructors

        //- Construct from components
        perfectInterface
        (
            const word& name,
            const label index,
            const polyTopoChanger& mme,
            const word& faceZoneName,
            const word& masterPatchName,
            const word& slavePatchName
        );

        //- Construct from dictionary
        perfectInterface
        (
            const word& name,
            const dictionary& dict,
            const label index,
            const polyTopoChanger& mme
        );


    //- Destructor
    virtual ~perfectInterface();


    // Member Functions

        //- Check for topology change
        virtual bool changeTopology() const;

        //- Insert the layer addition/removal instructions
        //  into the topological change
        virtual void setRefinement(polyTopoChange&) const;

        //- Insert the layer addition/removal instructions
        //  into the topological change. Uses only mesh, not any of the
        //  patch and zone indices. Bit of a workaround - used in extruding
        //  a mesh.
        virtual void setRefinement
        (
            const indirectPrimitivePatch& pp0,
            const indirectPrimitivePatch& pp1,
            polyTopoChange&
        ) const;

        //- Modify motion points to comply with the topological change
        virtual void modifyMotionPoints(pointField& motionPoints) const;

        //- Force recalculation of locally stored data on topological change
        virtual void updateMesh(const mapPolyMesh&);

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

        //- Write dictionary
        virtual void writeDict(Ostream&) const;

};


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

} // End namespace Foam

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

#endif

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