haloToCell.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::haloToCell
 
Description
    A \c topoSetCellSource to select cells attached to the outside
    of this \c cellSet, and add into/remove from this \c cellSet.
 
    Operands:
    \table
      Operand  | Type    | Location
      input    | cellSet | $FOAM_CASE/constant/polyMesh/sets/<set>
      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      haloToCell;
 
        // Optional entries
        steps       1;
    }
    \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: haloToCell             | word |  yes  | -
      steps      | Number of grow/shrink steps to use  | label | no   | 1
    \endtable
 
    Options for the \c action entry:
    \verbatim
      add      | Add selected cells into this cellSet
      subtract | Remove selected cells from this cellSet
    \endverbatim
 
Note
    - \c action=new is not available for \c haloToCell.
    - When removing halo cells, this strips off
    any cells on the boundary of the cellSet.
 
See also
    - Foam::topoSetSource
    - Foam::topoSetCellSource
 
SourceFiles
    haloToCell.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef haloToCell_H
#define haloToCell_H
 
#include "topoSetCellSource.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                         Class haloToCell Declaration
\*---------------------------------------------------------------------------*/
 
class haloToCell
:
    public topoSetCellSource
{
    // Private Data
 
        //- Add usage string
        static addToUsageTable usage_;
 
        //- Number of grow/shrink steps
        label steps_;
 
 
    // Private Member Functions
 
        void combine(topoSet& set, const bool add) const;
 
 
public:
 
    //- Runtime type information
    TypeName("haloToCell");
 
 
    // Constructors
 
        //- Construct from components
        explicit haloToCell(const polyMesh& mesh, const label nsteps=1);
 
        //- Construct from dictionary
        haloToCell(const polyMesh& mesh, const dictionary& dict);
 
        //- Construct from Istream
        haloToCell(const polyMesh& mesh, Istream& is);
 
 
    //- Destructor
    virtual ~haloToCell() = default;
 
 
    // Member Functions
 
        //- The number of steps to grow/shrink
        label steps() const noexcept;
 
        //- Set number of steps to grow/shrink, return the old value
        label steps(const label nsteps) noexcept;
 
 
        virtual void applyToSet
        (
            const topoSetSource::setAction action,
            topoSet& set
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //