hexCellLooper.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
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::hexCellLooper
 
Description
    Implementation of cellLooper.
 
    This one walks hexes in a topological way:
      - cross edge to other face
      - cross face by walking edge-point-edge across to reach the other side.
    (edges are always cut through the middle)
 
    For anything else (tet, prism, .. poly) it will use geomCellLooper
    (which does a purely geometric cut using a plane through cell centre)
 
SourceFiles
    hexCellLooper.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef hexCellLooper_H
#define hexCellLooper_H
 
#include "geomCellLooper.H"
#include "typeInfo.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class cellModel;
 
/*---------------------------------------------------------------------------*\
                           Class hexCellLooper Declaration
\*---------------------------------------------------------------------------*/
 
class hexCellLooper
:
    public geomCellLooper
{
protected:
 
    // Protected Data
 
        //- Reference to hex cell shape.
        const cellModel& hex_;
 
private:
 
    // Private Member Functions
 
        //- Walk across faces of hex. Update loop/loopWeights with edges cut.
        //  Return true if successful walk. (should be always!)
        bool walkHex
        (
            const label celli,
            const label startFacei,
            const label startEdgeI,
 
            labelList& loop,
            scalarField& loopWeights
        ) const;
 
        //- Convert loop into face and points
        void makeFace
        (
            const labelList& loop,
            const scalarField& loopWeights,
 
            labelList& faceVerts,
            pointField& facePoints
        ) const;
 
 
        //- No copy construct
        hexCellLooper(const hexCellLooper&) = delete;
 
        //- No copy assignment
        void operator=(const hexCellLooper&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("hexCellLooper");
 
 
    // Constructors
 
        //- Construct from mesh
        explicit hexCellLooper(const polyMesh& mesh);
 
 
    //- Destructor
    virtual ~hexCellLooper() = default;
 
 
    // Member Functions
 
        //- Create cut along circumference of celli. Gets current mesh cuts.
        //  Cut along circumference is expressed as loop of cuts plus weights
        //  for cuts along edges (only valid for edge cuts).
        //  Return true if successful cut.
        virtual bool cut
        (
            const vector& refDir,
            const label celli,
            const boolList& vertIsCut,
            const boolList& edgeIsCut,
            const scalarField& edgeWeight,
 
            labelList& loop,
            scalarField& loopWeights
        ) const;
 
 
        //- Same but now also base point of cut provided (instead of always
        //  cell centre)
        virtual bool cut
        (
            const plane& cutPlane,
            const label celli,
            const boolList& vertIsCut,
            const boolList& edgeIsCut,
            const scalarField& edgeWeight,
 
            labelList& loop,
            scalarField& loopWeights
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //