/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2010-2010 OpenCFD Ltd.
     \\/     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 2 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, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Application
    foamToSurface

Description
    Reads an OpenFOAM mesh and writes the boundaries in a surface format.

Usage
    - foamToSurface [OPTION] \n
    Reads an OpenFOAM mesh and writes the boundaries in a surface format.

    @param -scale \<factor\>\n
    Specify an alternative geometry scaling factor.
    Eg, use @b 1000 to scale @em [m] to @em [mm].

    @param -tri \n
    Triangulate surface.

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

#include "argList.H"
#include "timeSelector.H"
#include "Time.H"
#include "polyMesh.H"

#include "MeshedSurfaces.H"

using namespace Foam;

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Main program:

int main(int argc, char *argv[])
{
    argList::noParallel();
    argList::validArgs.append("outputFile.ext");
    timeSelector::addOptions();

    argList::addOption
    (
        "scale",
        "scale",
        "specify geometry scaling factor"
    );
    argList::addBoolOption
    (
        "tri",
        "triangulate surface"
    );

#   include "setRootCase.H"

    const stringList& params = args.additionalArgs();

    scalar scaleFactor = 0;
    args.optionReadIfPresent<scalar>("scale", scaleFactor);
    const bool doTriangulate = args.optionFound("tri");

    fileName exportName(params[0]);

    fileName exportBase = exportName.lessExt();
    word exportExt = exportName.ext();

    if (!meshedSurface::canWriteType(exportExt, true))
    {
        return 1;
    }

#   include "createTime.H"
    instantList timeDirs = timeSelector::select0(runTime, args);
#   include "createPolyMesh.H"

    forAll(timeDirs, timeI)
    {
        runTime.setTime(timeDirs[timeI], timeI);
#       include "getTimeIndex.H"

        polyMesh::readUpdateState state = mesh.readUpdate();

        if (timeI == 0 || state != polyMesh::UNCHANGED)
        {
            if (state == polyMesh::UNCHANGED)
            {
                exportName = exportBase + "." + exportExt;
            }
            else
            {
                exportName =
                    exportBase + '_' + runTime.timeName() + "." + exportExt;
            }

            meshedSurface surf(mesh.boundaryMesh());
            surf.scalePoints(scaleFactor);

            Info<< "writing " << exportName;
            if (doTriangulate)
            {
                Info<< " triangulated";
                surf.triangulate();
            }

            if (scaleFactor <= 0)
            {
                Info<< " without scaling" << endl;
            }
            else
            {
                Info<< " with scaling " << scaleFactor << endl;
            }
            surf.write(exportName);
        }

        Info<< nl << endl;
    }

    Info<< "End\n" << endl;

    return 0;
}

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