randomDecomp.C

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    Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
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    for more details.
 
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#include "randomDecomp.H"
#include "Random.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
    defineTypeName(randomDecomp);
    addToRunTimeSelectionTable
    (
        decompositionMethod,
        randomDecomp,
        dictionary
    );
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
Foam::labelList Foam::randomDecomp::randomMap(const label nCells) const
{
    Random rndGen(0);
 
    labelList finalDecomp(nCells);
 
    for (label& val : finalDecomp)
    {
        val = rndGen.position<label>(0, nDomains_ - 1);
    }
 
    return finalDecomp;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::randomDecomp::randomDecomp
(
    const dictionary& decompDict,
    const word& regionName
)
:
    decompositionMethod(decompDict, regionName)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::labelList Foam::randomDecomp::decompose
(
    const pointField& points,
    const scalarField& pointWeights
) const
{
    return randomMap(points.size());
}
 
 
Foam::labelList Foam::randomDecomp::decompose
(
    const pointField& points
) const
{
    return randomMap(points.size());
}
 
 
Foam::labelList Foam::randomDecomp::decompose
(
    const polyMesh& mesh,
    const pointField&,
    const scalarField&
) const
{
    return randomMap(mesh.nCells());  // or cc.size()
}
 
 
Foam::labelList Foam::randomDecomp::decompose
(
    const labelListList& globalCellCells,
    const pointField&,
    const scalarField&
) const
{
    return randomMap(globalCellCells.size());  // or cc.size()
}
 
 
// ************************************************************************* //