cell.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
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-------------------------------------------------------------------------------
    Copyright (C) 2011 OpenFOAM Foundation
    Copyright (C) 2017-2020 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::cell
 
Description
    A cell is defined as a list of faces with extra functionality
 
SourceFiles
    cellI.H
    cell.C
    oppositeCellFace.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef cell_H
#define cell_H
 
#include "faceList.H"
#include "oppositeFace.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class cell Declaration
\*---------------------------------------------------------------------------*/
 
class cell
:
    public labelList
{
public:
 
    // Static Data Members
 
        static const char* const typeName;
 
 
    // Constructors
 
        //- Default construct
        constexpr cell() noexcept = default;
 
        //- Construct given size, with invalid point labels (-1)
        inline explicit cell(const label sz);
 
        //- Copy construct from list of face labels
        inline explicit cell(const labelUList& list);
 
        //- Move construct from list of face labels
        inline explicit cell(labelList&& list);
 
        //- Copy construct from list of face labels
        template<unsigned N>
        inline explicit cell(const FixedList<label, N>& list);
 
        //- Copy construct from subset of face labels
        inline cell(const labelUList& list, const labelUList& indices);
 
        //- Copy construct from subset of face labels
        template<unsigned N>
        inline cell(const labelUList& list, const FixedList<label, N>& indices);
 
        //- Construct from Istream
        inline explicit cell(Istream& is);
 
 
    // Member Functions
 
        //- Return number of faces
        inline label nFaces() const noexcept;
 
        //- Return unordered list of cell vertices given the list of faces
        labelList labels(const faceUList& meshFaces) const;
 
        //- Return the cell vertices given the list of faces and mesh points
        pointField points
        (
            const faceUList& meshFaces,
            const UList<point>& meshPoints
        ) const;
 
        //- Return cell edges
        edgeList edges(const faceUList& meshFaces) const;
 
        //- Return index of opposite face
        label opposingFaceLabel
        (
            const label masterFaceLabel,
            const faceUList& meshFaces
        ) const;
 
        //- Return opposite face oriented the same way as the master face
        oppositeFace opposingFace
        (
            const label masterFaceLabel,
            const faceUList& meshFaces
        ) const;
 
 
        // Instructions for centre and mag:
        // When one wants to access the cell centre and magnitude, the
        // functionality on the mesh level should be used in preference to the
        // functions provided here. They do not rely to the functionality
        // implemented here, provide additional checking and are more efficient.
        // The cell::centre and cell::mag functions may be removed in the
        // future.
 
        //- Returns cell centre
        point centre
        (
            const UList<point>& meshPoints,
            const faceUList& meshFaces
        ) const;
 
        //- Returns cell volume
        scalar mag
        (
            const UList<point>& meshPoints,
            const faceUList& meshFaces
        ) const;
};
 
 
// Global Operators
 
//- Test if both cells are the same size and contain the same points
//  The internal point ordering is ignored
bool operator==(const cell& a, const cell& b);
 
//- Test if the cells differ (different size or different points)
inline bool operator!=(const cell& a, const cell& b);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "cellI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //