Commit 6ab92370 authored by Henry Weller's avatar Henry Weller
Browse files

Identity: special type derived from SphericalTensor to provide the concept of identity (I)

Allows efficient operators to be defined for the interaction between
types and the equivalent identity.
parent 9c0c6c5f
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2016 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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::Identity
Description
Templated Identity tensor derived from SphericalTensor.
\*---------------------------------------------------------------------------*/
#ifndef Identity_H
#define Identity_H
#include "SphericalTensor.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class Identity Declaration
\*---------------------------------------------------------------------------*/
template<class Cmpt>
class Identity
:
public SphericalTensor<Cmpt>
{
public:
// Constructors
//- Construct initializing the SphericalTensor to 1
Identity()
:
SphericalTensor<Cmpt>(1)
{}
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
......@@ -36,6 +36,7 @@ SourceFiles
#define sphericalTensor_H
#include "SphericalTensor.H"
#include "Identity.H"
#include "contiguous.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
......@@ -48,7 +49,7 @@ namespace Foam
typedef SphericalTensor<scalar> sphericalTensor;
// Identity tensor
static const sphericalTensor I(1);
static const Identity<scalar> I;
static const sphericalTensor oneThirdI(1.0/3.0);
static const sphericalTensor twoThirdsI(2.0/3.0);
......
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