regionToCell.H

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    Copyright (C) 2011-2012 OpenFOAM Foundation
    Copyright (C) 2018-2020 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.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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    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::regionToCell
 
Description
    A \c topoSetCellSource to select cells belonging to a topologically
    connected region (that contains given points). If started inside
    a given \c subCellSet keeps to it; if started outside stays outside.
 
    Operands:
    \table
      Operand   | Type    | Location
      input     | region  | $FOAM_CASE/constant/\{<region>, polyMesh\}
      output    | cellSet | $FOAM_CASE/constant/polyMesh/sets/<set>
    \endtable
 
Usage
    Minimal example by using \c system/topoSetDict.actions:
    \verbatim
    {
        // Mandatory (inherited) entries
        name        <name>;
        type        cellSet;
        action      <action>;
 
        // Mandatory entries
        source      regionToCell;
        insidePoints
        (
            (<p1x> <p1y> <p1z>)
            (<p2x> <p2y> <p2z>)
            ...
        );
 
        // Optional entries
        set       <cellSetName>;
        nErode    <label>;
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property   | Description                         | Type | Req'd | Dflt
      name       | Name of cellSet                     | word |  yes  | -
      type       | Type name: cellSet                  | word |  yes  | -
      action     | Action applied on cells - see below | word |  yes  | -
      source     | Source name: regionToCell           | word |  yes  | -
      insidePoints  | Coordinate(s) that is inside connected region <!--
                                             --> | vectorList |  yes  | -
      set        | Name of cellSet giving mesh subset  | word |  no   | none
      nErode     | Number of cell layers to erode mesh to detect holes <!--
           --> in the mesh - set to 0 if not used      | label | no   | 0
    \endtable
 
    Options for the \c action entry:
    \verbatim
      new      | Create a new cellSet from selected cells
      add      | Add selected cells into this cellSet
      subtract | Remove selected cells from this cellSet
    \endverbatim
 
See also
    - Foam::topoSetSource
    - Foam::topoSetCellSource
 
SourceFiles
    regionToCell.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef regionToCell_H
#define regionToCell_H
 
#include "topoSetCellSource.H"
#include "boolList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class regionSplit;
 
/*---------------------------------------------------------------------------*\
                        Class regionToCell Declaration
\*---------------------------------------------------------------------------*/
 
class regionToCell
:
    public topoSetCellSource
{
    // Private Data
 
        //- Add usage string
        static addToUsageTable usage_;
 
        //- Name of cellSet to keep to
        const word setName_;
 
        //- Coordinate(s) that is inside connected region
        const pointField insidePoints_;
 
        //- Number of layers to erode
        const label nErode_;
 
 
    // Private Member Functions
 
        //- Mark faces inbetween selected and unselected elements
        void markRegionFaces
        (
            const boolList& selectedCell,
            boolList& regionFace
        ) const;
 
        //- Determine for every disconnected region in the mesh whether
        //- it contains a locationInMesh
        boolList findRegions(const bool verbose, const regionSplit&) const;
 
        //- Unselect regions not containing a locationInMesh
        void unselectOutsideRegions(boolList& selectedCell) const;
 
        //- Unselect one layer of cells from selectedCell
        void shrinkRegions(boolList& selectedCell) const;
 
        //- Erode a given number of layers from selectedCell. Remove any
        //- region that gets disconnected that way.
        void erode(boolList& selectedCell) const;
 
        void combine(topoSet& set, const bool add) const;
 
 
public:
 
    //- Runtime type information
    TypeName("regionToCell");
 
 
    // Constructors
 
        //- Construct from components
        regionToCell
        (
            const polyMesh& mesh,
            const word& setName,
            const pointField& insidePoints,
            const label nErode
        );
 
        //- Construct from dictionary
        regionToCell(const polyMesh& mesh, const dictionary& dict);
 
        //- Construct from Istream
        regionToCell(const polyMesh& mesh, Istream& is);
 
 
    //- Destructor
    virtual ~regionToCell() = default;
 
 
    // Member Functions
 
        virtual void applyToSet
        (
            const topoSetSource::setAction action,
            topoSet& set
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //