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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
     \\/     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::PatchTools

Description
    A collection of tools for searching, sorting PrimitivePatch information.

    The class could also be extended to include more that just static methods.

SourceFiles
    PatchTools.C
    PatchToolsCheck.C
    PatchToolsEdgeOwner.C
    PatchToolsSearch.C
    PatchToolsSortEdges.C

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

#ifndef PatchTools_H
#define PatchTools_H

#include <OpenFOAM/PrimitivePatch_.H>
#include <OpenFOAM/HashSet.H>

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                         Class PatchTools Declaration
\*---------------------------------------------------------------------------*/

class PatchTools
{
public:

    //- Check for orientation issues.
    //  Returns true if problems were found.
    //  If a normal flips across an edge, places it in the HashSet
    template
    <
        class Face,
        template<class> class FaceList,
        class PointField,
        class PointType
    >
    static bool checkOrientation
    (
        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
        const bool report = false,
        labelHashSet* marked = 0
    );


    //- Fill faceZone with currentZone for every face reachable
    //  from faceI without crossing edge marked in borderEdge.
    //  Note: faceZone has to be sized nFaces before calling.
    template
    <
        class BoolListType,
        class Face,
        template<class> class FaceList,
        class PointField,
        class PointType
    >
    static void markZone
    (
        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
        const BoolListType& borderEdge,
        const label faceI,
        const label currentZone,
        labelList& faceZone
    );

    //- Size and fills faceZone with zone of face.
    //  Zone is area reachable by edge crossing without crossing borderEdge.
    //  Returns number of zones.
    template
    <
        class BoolListType,
        class Face,
        template<class> class FaceList,
        class PointField,
        class PointType
    >
    static label markZones
    (
        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
        const BoolListType& borderEdge,
        labelList& faceZone
    );

    //- Determine the mapping for a sub-patch.
    //  Only include faces for which bool-list entry is true.
    //  @param[in]  includeFaces faces to include
    //  @param[out] pointMap mapping new to old localPoints
    //  @param[out] faceMap  mapping new to old faces
    template
    <
        class BoolListType,
        class Face,
        template<class> class FaceList,
        class PointField,
        class PointType
    >
    static void subsetMap
    (
        const PrimitivePatch<Face, FaceList, PointField, PointType>&,
        const BoolListType& includeFaces,
        labelList& pointMap,
        labelList& faceMap
    );

    //- Return edge-face addressing sorted by angle around the edge.
    //  Orientation is anticlockwise looking from edge.vec(localPoints())
    template
    <
        class Face,
        template<class> class FaceList,
        class PointField,
        class PointType
    >
    static labelListList sortedEdgeFaces
    (
        const PrimitivePatch<Face, FaceList, PointField, PointType>&
    );


    //- If 2 face neighbours: label of face where ordering of edge
    //  is consistent with righthand walk.
    //  If 1 neighbour: label of only face.
    //  If >2 neighbours: undetermined.
    template
    <
        class Face,
        template<class> class FaceList,
        class PointField,
        class PointType
    >
    static labelList edgeOwner
    (
        const PrimitivePatch<Face, FaceList, PointField, PointType>&
    );


};


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

} // End namespace Foam

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

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

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

#endif

// ************************ vim: set sw=4 sts=4 et: ************************ //