cellFeatures.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
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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
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    for more details.
 
    You should have received a copy of the GNU General Public License
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Class
    Foam::cellFeatures
 
Description
    Cell analysis class.
 
    Constructs feature edges and feature points, which are edges/points with
    and angle > given specification.
    Can be asked for 'superFaces' which can be used to see if a cell is a
    'splitHex'.
 
SourceFiles
    cellFeatures.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef cellFeatures_H
#define cellFeatures_H
 
#include "faceList.H"
#include "labelList.H"
#include "boolList.H"
#include "HashSet.H"
#include "Map.H"
#include "DynamicList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of classes
class primitiveMesh;
 
/*---------------------------------------------------------------------------*\
                           Class cellFeatures Declaration
\*---------------------------------------------------------------------------*/
 
class cellFeatures
{
    // Private data
 
        const primitiveMesh& mesh_;
 
        //- Cos of angle between two connected faces or two connected edges on
        //  same face before edge/point is 'feature'.
        scalar minCos_;
 
        label celli_;
 
        //- Feature edges
        labelHashSet featureEdge_;
 
        //- (demand driven) Faces after removing internal points&edges
        mutable faceList* facesPtr_;
 
        //- New to old face mapping
        mutable List<DynamicList<label>> faceMap_;
 
 
    // Private Member Functions
 
        bool faceAlignedEdge(const label, const label) const;
 
        label nextEdge
        (
            const Map<label>& toSuperFace,
            const label superFacei,
            const label thisEdgeI,
            const label thisVertI
        ) const;
 
        bool isCellFeatureEdge(const scalar, const label) const;
 
        void walkSuperFace
        (
            const label facei,
            const label superFacei,
            Map<label>& toSuperFace
        ) const;
 
        void calcSuperFaces() const;
 
 
        //- No copy construct
        cellFeatures(const cellFeatures&) = delete;
 
        //- No copy assignment
        void operator=(const cellFeatures&) = delete;
 
public:
 
    // Constructors
 
        //- Construct from cell in mesh
        cellFeatures
        (
            const primitiveMesh&,
            const scalar minCos,    // angle to use for feature recognition.
            const label celli
        );
 
 
    //- Destructor
    ~cellFeatures();
 
 
    // Member Functions
 
        // Access
 
            const labelHashSet& featureEdge() const
            {
                return featureEdge_;
            }
 
            const faceList& faces() const
            {
                if (!facesPtr_)
                {
                    calcSuperFaces();
                }
                return *facesPtr_;
            }
 
            //- New to old faceMap. Guaranteed to be shrunk.
            const List<DynamicList<label>>& faceMap() const
            {
                if (!facesPtr_)
                {
                    calcSuperFaces();
                }
                return faceMap_;
            }
 
 
        // Check
 
            //- Is edge a feature edge (uniquely determined since on cell
            //  only two faces sharing edge)
            bool isFeatureEdge(const label edgeI) const
            {
                return featureEdge().found(edgeI);
            }
 
            //- Are two edges connected at feature point?
            //  Is local to face since point might be seen as feature point
            //  from one face but not from another.
            bool isFeaturePoint(const label edge0, const label edge1) const;
 
            //- Is vertexI on facei used by two edges that form feature
            //  point
            bool isFeatureVertex(const label facei, const label vertI) const;
 
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //