zoneSubSet.C

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    Copyright (C) 2021-2022 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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#include "zoneSubSet.H"
#include "cellBitSet.H"
#include "haloToCell.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace Detail
{
    defineTypeNameAndDebug(zoneSubSet, 0);
}
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

bool Foam::Detail::zoneSubSet::correct()
{
    subsetter_.clear();
    haloCells_.clearStorage();

    if (zoneMatcher_.empty())
    {
        return false;
    }

    // Select named zones
    cellBitSet selectedCells
    (
        subsetter_.baseMesh(),
        subsetter_.baseMesh().cellZones().selection(zoneMatcher_)
    );

    if (debug)
    {
        Pout<< "Subsetting "
            << selectedCells.addressing().count()
            << " cells based on cellZones "
            << flatOutput(zoneMatcher_) << endl;
    }

    if (nLayers_ > 0)
    {
        // Add halo layer(s)
        haloToCell haloSource(subsetter_.baseMesh(), nLayers_);
        haloSource.verbose(false);

        // Before adding halo cells
        haloCells_ = selectedCells.addressing();

        haloSource.applyToSet(topoSetSource::ADD, selectedCells);

        // Halo cells: anything new, not in the original set
        haloCells_ ^= selectedCells.addressing();
    }

    if (debug)
    {
        const label nHalo = haloCells_.count();
        const label nSubCell = selectedCells.addressing().count();

        Info<< "    overall "
            << returnReduce(nSubCell, sumOp<label>())
            << " cells after adding " << nLayers_ << " layers with "
            << returnReduce(nHalo, sumOp<label>())
            << " halo cells"
            << endl;
    }

    subsetter_.reset(selectedCells.addressing());

    return true;
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::Detail::zoneSubSet::zoneSubSet
(
    const fvMesh& mesh,
    const wordRes& zoneSelector,
    const label nZoneLayers
)
:
    subsetter_(mesh),
    zoneMatcher_(zoneSelector),
    nLayers_(nZoneLayers),
    haloCells_()
{
    correct();
}


Foam::Detail::zoneSubSet::zoneSubSet
(
    const fvMesh& mesh,
    const dictionary& dict
)
:
    subsetter_(mesh),
    zoneMatcher_(),
    nLayers_(dict.getOrDefault<label>("nLayers", 0)),
    haloCells_()
{
    dict.readIfPresent("cellZones", zoneMatcher_);

    correct();
}


// ************************************************************************* //