readFields.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2018-2020 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/>.
 
InNamespace
    Foam
 
Description
    Helper routines for reading a field or fields,
    for foamToEnsight
 
SourceFiles
    readFields.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef readFields_H
#define readFields_H
 
#include "instantList.H"
#include "IOobjectList.H"
#include "zeroGradientFvPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
//- Get the field or return nullptr
template<class GeoField>
tmp<GeoField> getField
(
    const IOobject* io,
    const typename GeoField::Mesh& mesh
)
{
    if (io)
    {
        return tmp<GeoField>::New(*io, mesh);
    }
 
    return nullptr;
}
 
 
//- Get the named field from the objects, or return nullptr.
template<class GeoField>
tmp<GeoField> getField
(
    const typename GeoField::Mesh& mesh,
    const IOobjectList& objects,
    const word& fieldName
)
{
    // Can do something with syncPar on failure ...
 
    return getField<GeoField>(objects.findObject(fieldName), mesh);
}
 
 
//- Convert an internal field to zero-gradient volume field
template<class Type>
tmp<GeometricField<Type, fvPatchField, volMesh>>
makeZeroGradientField
(
    const tmp
    <
        typename GeometricField<Type, fvPatchField, volMesh>::Internal
    >& tdf
)
{
    if (tdf.valid())
    {
        auto& df = tdf.ref();
 
        auto tfield = GeometricField<Type, fvPatchField, volMesh>::New
        (
            df.name(),
            df.mesh(),
            df.dimensions(),
            std::move(df.field()),
            zeroGradientFvPatchScalarField::typeName
        );
 
        tfield.ref().oriented() = df.oriented();
        tfield.ref().correctBoundaryConditions();
 
        tdf.clear();
 
        return tfield;
    }
 
    tdf.clear();
 
    return nullptr;
}
 
 
//- Convert a volume field to zero-gradient volume field
template<class Type>
tmp<GeometricField<Type, fvPatchField, volMesh>>
makeZeroGradientField
(
    const tmp<GeometricField<Type, fvPatchField, volMesh>>& tdf
)
{
    if (tdf.valid())
    {
        auto& df = tdf.ref();
 
        auto tfield = GeometricField<Type, fvPatchField, volMesh>::New
        (
            df.name(),
            df.mesh(),
            df.dimensions(),
            std::move(df.primitiveFieldRef(false)),  // No update accessTime
            zeroGradientFvPatchScalarField::typeName
        );
 
        tfield.ref().oriented() = df.oriented();
        tfield.ref().correctBoundaryConditions();
 
        tdf.clear();
 
        return tfield;
    }
 
    tdf.clear();
 
    return nullptr;
}
 
 
//- Check if fields are good to use (available at all times)
//  ignore special fields (_0 fields),
//  ignore fields that are not available for all time-steps
label checkData
(
    const fvMesh& mesh,
    const instantList& timeDirs,
    wordList& objectNames
);
 
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //