holeToFace.H

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    Copyright (C) 2020 OpenCFD Ltd.
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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.
 
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    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::holeToFace
 
Description
    A topoSetFaceSource to select a set of faces that closes a hole i.e.
    disconnects zones (specified by locations) from one another.
 
    Algorithm roughly according to
    "A 3D-Hole Closing Algorithm", Zouina Aktouf et al
 
    \heading Dictionary parameters
    \table
        Property    | Description                       | Required  | Default
        points      | Per zone the list of points       | yes   |
        faceSet     | Optional blocked faces            | no    | <empty>
        cellSet     | Optional subset of cells to operate in | no    | <empty>
        erode       | Perform some cleanup on set       | no    | no
    \endtable
 
    Limited to max 31 zones.
 
SourceFiles
    holeToFace.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef holeToFace_H
#define holeToFace_H
 
#include "topoSetFaceSource.H"
#include "bitSet.H"
#include "mapDistribute.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                        Class holeToFace Declaration
\*---------------------------------------------------------------------------*/
 
class holeToFace
:
    public topoSetFaceSource
{
    // Private data
 
        //- Add usage string
        static addToUsageTable usage_;
 
        //- Per 'zone' the set of points
        List<pointField> zonePoints_;
 
        //- Names of faceSets specifying blockage
        wordList blockedFaceNames_;
 
        //- Names of cellSets specifying blockage
        wordList blockedCellNames_;
 
        //- Erode set
        bool erode_;
 
 
    // Private Member Functions
 
        // Helper functions
 
            //- Expand pointField into list of pointFields
            static List<pointField> expand(const pointField& pts);
 
            //- Write .obj file with selected faces
            void writeFaces
            (
                const word& name,
                const bitSet& faceFld
            ) const;
 
 
        //- Calculate topological distance from seedFaces. Do not cross
        //  blocked cells/faces
        void calculateDistance
        (
            const labelList& seedFaces,
            const bitSet& isBlockedCell,
            const bitSet& isBlockedFace,
            labelList& cellDist,
            labelList& faceDist
        ) const;
 
        //- Calculate faces on outside of hole cells. Ignore blocked faces
        //  (isSurfaceFace) and faces reachable from more than one location
        bitSet frontFaces
        (
            const bitSet& isSurfaceFace,
            const List<unsigned int>& locationFaces,
            const bitSet& isHoleCell
        ) const;
 
        //- Overall driver to find minimum set of faces to close the path
        //  between zones
        bitSet findClosure
        (
            const bitSet& isSurfaceFace,                // intersected faces
            const bitSet& isCandidateHoleCell,          // starting blockage
            const labelListList& locationCells          // cells per zone
        ) const;
 
        //- WIP. Remove excess faces. Not parallel consistent.
        bitSet erodeSet
        (
            const bitSet& isSurfaceFace,
            const bitSet& isSetFace
        ) const;
 
 
public:
 
    //- Runtime type information
    TypeName("holeToFace");
 
    // Constructors
 
        //- Construct from components
        holeToFace
        (
            const polyMesh& mesh,
            const List<pointField>& zonePoints,
            const wordList& blockedFaceNames,
            const wordList& blockedCellNames,
            const bool erode
        );
 
        //- Construct from dictionary
        holeToFace(const polyMesh& mesh, const dictionary& dict);
 
        //- Construct from Istream
        holeToFace(const polyMesh& mesh, Istream& is);
 
 
    //- Destructor
    virtual ~holeToFace() = default;
 
 
    // Member Functions
 
        virtual void applyToSet
        (
            const topoSetSource::setAction action,
            topoSet&
        ) const;
 
        //- Optional direct use to generate a faceSet
        void combine
        (
            topoSet& set,
            const bitSet& isBlockedFace,
            const bitSet& isActiveCell,
            const bool add
        ) const;
 
        //- Optional direct use to generate the set of faces and the method to
        //  get data from nearby blocked faces. Gets provided with the
        //  - set of points per 'zone'
        //  - set of blocked faces
        //  - global numbering for these blocked faces
        //  Returns
        //  - the set of faces to disconnect zones from one
        //    another (closureFaces)
        //  - a nullptr or the maps from closureFaces to nearest blocked face
        //    (mapDistribute and closureToBlocked). Note: closureToBlocked
        //     (index into the map) can contain -1 if no nearby valid blocked
        //    face could be found (from an edge-face-edge walk)
        static autoPtr<mapDistribute> calcClosure
        (
            const polyMesh& mesh,
            const List<pointField>& zonePoints,
            const labelList& blockedFaces,
            const globalIndex& globalBlockedFaces,
            const bool erode,
            labelList& closureFaces,
            labelList& closureToBlocked
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //