SphericalTensor.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019-2023 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.
 
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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::SphericalTensor
 
Description
    A templated (3 x 3) diagonal tensor of objects of <T>, effectively
    containing 1 element, derived from VectorSpace.
 
See also
    Test-SphericalTensor.C
 
SourceFiles
    SphericalTensorI.H
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_SphericalTensor_H
#define Foam_SphericalTensor_H
 
#include "contiguous.H"
#include "VectorSpace.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class SphericalTensor Declaration
\*---------------------------------------------------------------------------*/
 
template<class Cmpt>
class SphericalTensor
:
    public VectorSpace<SphericalTensor<Cmpt>, Cmpt, 1>
{
public:
 
    // Typedefs
 
        //- Equivalent type of labels used for valid component indexing
        typedef SphericalTensor<label> labelType;
 
 
    // Member Constants
 
        //- Rank of SphericalTensor is 2
        static constexpr direction rank = 2;
 
 
    // Static Data Members
 
        static const SphericalTensor I;
        static const SphericalTensor oneThirdI;
        static const SphericalTensor twoThirdsI;
 
 
    //- Component labeling enumeration
    enum components { II };
 
 
    // Generated Methods
 
        //- Default construct
        SphericalTensor() = default;
 
        //- Copy construct
        SphericalTensor(const SphericalTensor&) = default;
 
        //- Copy assignment
        SphericalTensor& operator=(const SphericalTensor&) = default;
 
 
    // Constructors
 
        //- Construct initialized to zero
        inline SphericalTensor(Foam::zero);
 
        //- Construct given VectorSpace
        template<class Cmpt2>
        inline SphericalTensor
        (
            const VectorSpace<SphericalTensor<Cmpt2>, Cmpt2, 1>&
        );
 
        //- Construct given the component
        inline explicit SphericalTensor(const Cmpt& tii);
 
        //- Construct from Istream
        inline explicit SphericalTensor(Istream& is);
 
 
    // Member Functions
 
    // Component Access
 
        const Cmpt& ii() const noexcept { return this->v_[II]; }
 
        Cmpt& ii() noexcept { return this->v_[II]; }
 
 
    // Diagonal access and manipulation
 
        //- The L2-norm squared of the diagonal
        inline scalar diagSqr() const;
 
 
    // Tensor Operations
 
        //- Return non-Hermitian transpose (no-op)
        const SphericalTensor<Cmpt>& T() const noexcept { return *this; }
};
 
 
// * * * * * * * * * * * * * * * * * Traits  * * * * * * * * * * * * * * * * //
 
//- Data are contiguous if component type is contiguous
template<class Cmpt>
struct is_contiguous<SphericalTensor<Cmpt>> : is_contiguous<Cmpt> {};
 
//- Data are contiguous label if component type is label
template<class Cmpt>
struct is_contiguous_label<SphericalTensor<Cmpt>>
:
    is_contiguous_label<Cmpt>
{};
 
//- Data are contiguous scalar if component type is scalar
template<class Cmpt>
struct is_contiguous_scalar<SphericalTensor<Cmpt>>
:
    is_contiguous_scalar<Cmpt>
{};
 
 
template<class Cmpt>
class typeOfSolve<SphericalTensor<Cmpt>>
{
public:
 
    typedef SphericalTensor<solveScalar> type;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "SphericalTensorI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //