SymmTensor.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019-2020 OpenCFD Ltd.
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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
    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::SymmTensor
 
Description
    A templated (3 x 3) symmetric tensor of objects of <T>, effectively
    containing 6 elements, derived from VectorSpace.
 
See also
    Test-SymmTensor.C
 
SourceFiles
    SymmTensorI.H
 
\*---------------------------------------------------------------------------*/
 
#ifndef SymmTensor_H
#define SymmTensor_H
 
#include "contiguous.H"
#include "Vector.H"
#include "SphericalTensor.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class SymmTensor Declaration
\*---------------------------------------------------------------------------*/
 
template<class Cmpt>
class SymmTensor
:
    public VectorSpace<SymmTensor<Cmpt>, Cmpt, 6>
{
public:
 
    // Typedefs
 
        //- Equivalent type of labels used for valid component indexing
        typedef SymmTensor<label> labelType;
 
 
    // Member Constants
 
        //- Rank of SymmTensor is 2
        static constexpr direction rank = 2;
 
 
    // Static Data Members
 
        static const SymmTensor I;
 
 
    //- Component labeling enumeration
    enum components { XX, XY, XZ, YY, YZ, ZZ };
 
 
    // Generated Methods
 
        //- Default construct
        SymmTensor() = default;
 
        //- Copy construct
        SymmTensor(const SymmTensor&) = default;
 
        //- Copy assignment
        SymmTensor& operator=(const SymmTensor&) = default;
 
 
    // Constructors
 
        //- Construct initialized to zero
        inline SymmTensor(const Foam::zero);
 
        //- Construct given VectorSpace of the same rank
        template<class Cmpt2>
        inline SymmTensor(const VectorSpace<SymmTensor<Cmpt2>, Cmpt2, 6>&);
 
        //- Construct given SphericalTensor
        inline SymmTensor(const SphericalTensor<Cmpt>&);
 
        //- Construct given the six components
        inline SymmTensor
        (
            const Cmpt txx, const Cmpt txy, const Cmpt txz,
                            const Cmpt tyy, const Cmpt tyz,
                                            const Cmpt tzz
        );
 
        //- Construct from Istream
        inline explicit SymmTensor(Istream& is);
 
 
    // Member Functions
 
        // Component access
 
            inline const Cmpt& xx() const;
            inline const Cmpt& xy() const;
            inline const Cmpt& xz() const;
            inline const Cmpt& yx() const;
            inline const Cmpt& yy() const;
            inline const Cmpt& yz() const;
            inline const Cmpt& zx() const;
            inline const Cmpt& zy() const;
            inline const Cmpt& zz() const;
 
            inline Cmpt& xx();
            inline Cmpt& xy();
            inline Cmpt& xz();
            inline Cmpt& yx();
            inline Cmpt& yy();
            inline Cmpt& yz();
            inline Cmpt& zx();
            inline Cmpt& zy();
            inline Cmpt& zz();
 
 
        // Diagonal access and manipulation
 
            //- Extract the diagonal as a vector
            inline Vector<Cmpt> diag() const;
 
            //- Set values of the diagonal
            inline void diag(const Vector<Cmpt>& v);
 
 
    // Tensor Operations
 
        //- Return non-Hermitian transpose
        inline const SymmTensor<Cmpt>& T() const;
 
 
    // Member Operators
 
        //- Inherit VectorSpace assignment operators
        using SymmTensor::vsType::operator=;
 
        //- Assign to given SphericalTensor
        inline void operator=(const SphericalTensor<Cmpt>&);
};
 
 
// * * * * * * * * * * * * * * * * * Traits  * * * * * * * * * * * * * * * * //
 
//- Data are contiguous if component type is contiguous
template<class Cmpt>
struct is_contiguous<SymmTensor<Cmpt>> : is_contiguous<Cmpt> {};
 
//- Data are contiguous label if component type is label
template<class Cmpt>
struct is_contiguous_label<SymmTensor<Cmpt>> : is_contiguous_label<Cmpt> {};
 
//- Data are contiguous scalar if component type is scalar
template<class Cmpt>
struct is_contiguous_scalar<SymmTensor<Cmpt>> : is_contiguous_scalar<Cmpt> {};
 
 
template<class Cmpt>
class symmTypeOfRank<Cmpt, 2>
{
public:
 
    typedef SymmTensor<Cmpt> type;
};
 
 
template<class Cmpt>
class typeOfSolve<SymmTensor<Cmpt>>
{
public:
 
    typedef SymmTensor<solveScalar> type;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "SymmTensorI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //