/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 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 "sampledIsoSurface.H"
#include "volFieldsFwd.H"
#include "pointFields.H"
#include "volPointInterpolation.H"

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

template <class Type>
Foam::tmp<Foam::Field<Type> >
Foam::sampledIsoSurface::sampleField
(
    const GeometricField<Type, fvPatchField, volMesh>& vField
) const
{
    // Recreate geometry if time has changed
    updateGeometry();

    return tmp<Field<Type> >(new Field<Type>(vField, surface().meshCells()));
}


template <class Type>
Foam::tmp<Foam::Field<Type> >
Foam::sampledIsoSurface::interpolateField
(
    const interpolation<Type>& interpolator
) const
{
    // Get fields to sample. Assume volPointInterpolation!
    const GeometricField<Type, fvPatchField, volMesh>& volFld =
        interpolator.psi();

    // Recreate geometry if time has changed
    updateGeometry();

    if (subMeshPtr_.valid())
    {
        tmp<GeometricField<Type, fvPatchField, volMesh> > tvolSubFld =
            subMeshPtr_().interpolate(volFld);

        const GeometricField<Type, fvPatchField, volMesh>& volSubFld =
            tvolSubFld();

        tmp<GeometricField<Type, pointPatchField, pointMesh> > tpointSubFld =
            volPointInterpolation::New(volSubFld.mesh()).interpolate(volSubFld);

        // Sample.
        return surface().interpolate
        (
            (
                average_
              ? pointAverage(tpointSubFld())()
              : volSubFld
            ),
            tpointSubFld()
        );
    }
    else
    {
        tmp<GeometricField<Type, pointPatchField, pointMesh> > tpointFld =
            volPointInterpolation::New(volFld.mesh()).interpolate(volFld);

        // Sample.
        return surface().interpolate
        (
            (
                average_
              ? pointAverage(tpointFld())()
              : volFld
            ),
            tpointFld()
        );
    }
}


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