datToFoam.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2020-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
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/>.
 
Application
    datToFoam
 
Group
    grpMeshConversionUtilities
 
Description
    Reads in a datToFoam mesh file and outputs a points file.
    Used in conjunction with blockMesh.
 
\*---------------------------------------------------------------------------*/
 
#include "argList.H"
#include "Time.H"
#include "Fstream.H"
#include "polyMesh.H"
#include "unitConversion.H"
 
using namespace Foam;
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
int main(int argc, char *argv[])
{
    argList::addNote
    (
        "Reads in a datToFoam mesh file and outputs a points file.\n"
        "Used in conjunction with blockMesh."
    );
 
    argList::noParallel();
    argList::addArgument("dat file");
 
    argList args(argc, argv);
 
    if (!args.check())
    {
        FatalError.exit();
    }
 
    #include "createTime.H"
 
    std::ifstream plot3dFile(args.get<fileName>(1));
 
    string line;
    std::getline(plot3dFile, line);
    std::getline(plot3dFile, line);
 
    IStringStream Istring(line);
    word block;
    string zoneName;
    token punctuation;
    label iPoints, jPoints;
 
    Istring >> block;
    Istring >> block;
    Istring >> zoneName;
    Istring >> punctuation;
    Istring >> block;
    Istring >> iPoints;
    Istring >> block;
    Istring >> jPoints;
 
    Info<< "Number of vertices in i direction = " << iPoints << nl
        << "Number of vertices in j direction = " << jPoints << endl;
 
    // We ignore the first layer of points in i and j the biconic meshes
    const label nPointsij = (iPoints - 1)*(jPoints - 1);
 
    pointField points(nPointsij, Zero);
 
    for (direction comp = 0; comp < 2; ++comp)
    {
        label p = 0;
 
        for (label j = 0; j < jPoints; ++j)
        {
            for (label i = 0; i < iPoints; ++i)
            {
                scalar coord;
                plot3dFile >> coord;
 
                // if statement ignores the first layer in i and j
                if (i>0 && j>0)
                {
                    points[p++][comp] = coord;
                }
            }
        }
    }
 
    // correct error in biconic meshes
    for (point& p : points)
    {
        if (p.y() < 1e-07)
        {
            p.y() = 0;
        }
    }
 
    pointField pointsWedge(nPointsij*2, Zero);
 
    const scalar a = degToRad(0.1);
    const tensor rotateZ
    (
        1.0,  0.0,      0.0,
        0.0,  1.0,      0.0,
        0.0, -::sin(a), ::cos(a)
    );
 
    forAll(points, i)
    {
        pointsWedge[i] = (rotateZ & points[i]);
        pointsWedge[i + nPointsij] =
            cmptMultiply
            (
                vector(1.0, 1.0, -1.0),
                pointsWedge[i]
            );
    }
 
    // Write (overwrite) points
    {
        IOobject iopoints
        (
            "points",
            runTime.constant(),     // instance
            polyMesh::meshSubDir,   // local
            runTime
        );
 
        if (!exists(iopoints.path()))
        {
            mkDir(iopoints.path());
        }
 
        OFstream os(iopoints.objectPath(), runTime.writeStreamOption());
 
        Info<< "Writing points to: " << nl
            << "    " << os.name() << endl;
 
        iopoints.writeHeader(os, vectorIOField::typeName);
        os << pointsWedge;
        IOobject::writeEndDivider(os);
    }
 
    Info<< "End\n" << endl;
 
    return 0;
}
 
 
// ************************************************************************* //