/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | Multiphase Code Repository by HZDR
  ======   //   ||  || ===//   | Website: https://doi.org/10.14278/rodare.767
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    Website: https://hzdr.de

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#include "oneDimensionalDelta.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace SGSModels
{
    defineTypeNameAndDebug(oneDimensionalDelta, 0);
    addToRunTimeSelectionTable(SGSdelta, oneDimensionalDelta, dictionary);
}
}


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

void Foam::SGSModels::oneDimensionalDelta::calcDelta()
{
    const label nD = mesh_.nGeometricD();

    if (nD != 1)
    {
        FatalErrorInFunction
            << "Case is not 1D, this 'delta' method is not applicable"
            << exit(FatalError);
    }

    const Vector<label>& directions = mesh_.geometricD();

    // Get non-empty direction
    vector basevector(0, 0, 0);
    for (direction dir=0; dir<directions.nComponents; dir++)
    {
        if (directions[dir] == 1)
        {
            basevector[dir] = 1;
            break;
        }
    }

    const cellList& cells = mesh_.cells();
    scalarField hmax(cells.size());

    forAll(cells,celli)
    {
        scalar minCoord = great;
        scalar maxCoord = 0.0;
        const labelList& cFaces = mesh_.cells()[celli];

        forAll(cFaces, cFacei)
        {
            label facei = cFaces[cFacei];
            const point& facevector = mesh_.faceCentres()[facei];
            const scalar tmp = facevector & basevector;
            if (tmp > maxCoord)
            {
                maxCoord = tmp;
            }

            if (tmp < minCoord)
            {
                minCoord = tmp;
            }
        }

        hmax[celli] = maxCoord - minCoord;
    }

    delta_.primitiveFieldRef() = hmax;
}


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

Foam::SGSModels::oneDimensionalDelta::oneDimensionalDelta
(
    const word& name,
    const fvMesh& mesh,
    const dictionary& dict
)
:
    SGSdelta(name, mesh)
{
    calcDelta();
}


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

void Foam::SGSModels::oneDimensionalDelta::correct()
{
    if (mesh_.changing())
    {
        calcDelta();
    }
}


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