faMeshSubset.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2022 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.
 
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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::faMeshSubset
 
Description
    Holds a reference to the original mesh (the baseMesh)
    and optionally to a subset of that mesh (the subMesh)
    with mapping lists for points, faces, and cells.
 
Caution
    Currently not really functional for subsetting beyond handling
    a simple zero-sized mesh.
 
SourceFiles
    faMeshSubset.cxx
    faMeshSubset.txx
    faMeshSubsetI.H
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_faMeshSubset_H
#define Foam_faMeshSubset_H
 
#include "areaFaMesh.H"
#include "edgeFaMesh.H"
#include "GeometricField.H"
#include "bitSet.H"
#include "HashSet.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class mapDistributePolyMesh;
 
/*---------------------------------------------------------------------------*\
                        Class faMeshSubset Declaration
\*---------------------------------------------------------------------------*/
 
class faMeshSubset
{
    // Private Data
 
        //- The base mesh to subset from
        const faMesh& baseMesh_;
 
        //- Demand-driven subset mesh (pointer)
        autoPtr<faMesh> subMeshPtr_;
 
        //- Optional edge mapping array with flip encoded (-1/+1)
        mutable autoPtr<labelList> edgeFlipMapPtr_;
 
        //- Point mapping array
        labelList pointMap_;
 
        //- Face mapping array
        labelList faceMap_;
 
        //- Cell mapping array
        labelList cellMap_;
 
        //- Patch mapping array
        labelList patchMap_;
 
 
    // Private Member Functions
 
        //- Calculate face flip map
        void calcEdgeFlipMap() const;
 
 
protected:
 
    // Protected Member Functions
 
        //- FatalError if subset has not been performed
        bool checkHasSubMesh() const;
 
 
public:
 
    // Static Data Members
 
        //- Name for exposed internal edges (default: oldInternalEdges)
        static word exposedPatchName;
 
 
    // Generated Methods
 
        //- No copy construct
        faMeshSubset(const faMeshSubset&) = delete;
 
        //- No copy assignment
        void operator=(const faMeshSubset&) = delete;
 
 
    // Constructors
 
        //- Construct using the entire mesh (no subset)
        explicit faMeshSubset(const faMesh& baseMesh) noexcept;
 
        //- Construct a zero-sized subset mesh, non-processor patches only
        faMeshSubset(const faMesh& baseMesh, Foam::zero);
 
 
    // Member Functions
 
    // Access
 
        //- Original mesh
        inline const faMesh& baseMesh() const noexcept;
 
        //- Return baseMesh or subMesh, depending on the current state.
        inline const faMesh& mesh() const noexcept;
 
        //- Have subMesh?
        inline bool hasSubMesh() const noexcept;
 
        //- Return reference to subset mesh
        inline const faMesh& subMesh() const;
 
        //- Return reference to subset mesh
        inline faMesh& subMesh();
 
        //- Return point map
        inline const labelList& pointMap() const;
 
        //- Return face map
        inline const labelList& faceMap() const;
 
        //- Return edge map with sign to encode flipped edges
        inline const labelList& edgeFlipMap() const;
 
        //- Return cell map
        inline const labelList& cellMap() const;
 
        //- Return patch map
        inline const labelList& patchMap() const;
 
 
    // Edit
 
        //- Reset subMesh and all maps
        void clear();
 
        //- Reset subMesh and all maps. Same as clear()
        void reset();
 
        //- Reset to a zero-sized subset mesh, non-processor patches only
        void reset(Foam::zero);
 
 
    // Field Mapping (static functions)
 
        //- Map area field.
        //  Optionally allow unmapped faces not to produce a warning
        template<class Type>
        static tmp<GeometricField<Type, faPatchField, areaMesh>>
        interpolate
        (
            const GeometricField<Type, faPatchField, areaMesh>&,
            const faMesh& sMesh,
            const bool allowUnmapped = false
        );
 
        //- Map edge field.
        //  Optionally allow unmapped faces not to produce a warning
        template<class Type>
        static tmp<GeometricField<Type, faePatchField, edgeMesh>>
        interpolate
        (
            const GeometricField<Type, faePatchField, edgeMesh>&,
            const faMesh& sMesh
        );
 
 
    // Field Mapping
 
        //- Map area field.
        //  Optionally allow unmapped faces not to produce a warning
        template<class Type>
        tmp<GeometricField<Type, faPatchField, areaMesh>>
        interpolate
        (
            const GeometricField<Type, faPatchField, areaMesh>&,
            const bool allowUnmapped = false
        ) const;
 
        //- Map edge field.
        template<class Type>
        tmp<GeometricField<Type, faePatchField, edgeMesh>>
        interpolate
        (
            const GeometricField<Type, faePatchField, edgeMesh>&,
            const bool allowUnmapped = false
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "faMeshSubsetI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "faMeshSubset.txx"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //