/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2013 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/>.

\*---------------------------------------------------------------------------*/

#include "domainDecomposition.H"
#include "decompositionMethod.H"
#include "cpuTime.H"
#include "cellSet.H"
#include "regionSplit.H"
#include "Tuple2.H"
#include "faceSet.H"

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

void Foam::domainDecomposition::distributeCells()
{
    Info<< "\nCalculating distribution of cells" << endl;

    cpuTime decompositionTime;

    autoPtr<decompositionMethod> decomposePtr = decompositionMethod::New
    (
        decompositionDict_
    );

    scalarField cellWeights;
    if (decompositionDict_.found("weightField"))
    {
        word weightName = decompositionDict_.lookup("weightField");

        volScalarField weights
        (
            IOobject
            (
                weightName,
                time().timeName(),
                *this,
                IOobject::MUST_READ,
                IOobject::NO_WRITE
            ),
            *this
        );
        cellWeights = weights.internalField();
    }

    cellToProc_ = decomposePtr().decompose(*this, cellWeights);

    Info<< "\nFinished decomposition in "
        << decompositionTime.elapsedCpuTime()
        << " s" << endl;
}


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