readSeparatedPoints.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 2011-2023 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/>.
 
Description
    Create intermediate mesh from PROSTAR files
 
\*---------------------------------------------------------------------------*/
 
#include "starMesh.H"
#include "IFstream.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
void Foam::starMesh::readPoints(const scalar scaleFactor)
{
    label nPoints = 0;
    label maxLabel = -1;
 
    fileName pointsFileName(casePrefix_ + ".vrt");
 
    {
        IFstream pointsFile(pointsFileName);
 
        // Pass 1: get # points and maximum vertex label
 
        if (pointsFile.good())
        {
            label pointLabel;
            scalar x, y, z;
 
            maxLabel = -1;
            while ((pointsFile >> pointLabel).good())
            {
                nPoints++;
                maxLabel = max(maxLabel, pointLabel);
                pointsFile >> x >> y >> z;
            }
        }
        else
        {
            FatalErrorInFunction
                << "Cannot read file " << pointsFileName
                << abort(FatalError);
        }
    }
 
    Info<< "Number of points = " << nPoints << endl << endl;
 
    points_.setSize(nPoints);
    starPointIndex_.setSize(nPoints);
 
    // Reset STAR point ID, just in case
    starPointIndex_ = -1;
 
    starPointLabelLookup_.setSize(maxLabel+1);
 
    // reset point labels to invalid value
    starPointLabelLookup_ = -1;
 
    if (nPoints > 0)
    {
        // Pass 2: construct pointlist and conversion table
        // from Star vertex numbers to Foam pointLabels
 
        IFstream pointsFile(pointsFileName);
        label pointLabel;
 
        forAll(points_, p)
        {
            pointsFile
                >> pointLabel
                >> points_[p].x()
                >> points_[p].y()
                >> points_[p].z();
 
            starPointIndex_[p] = pointLabel;
            starPointLabelLookup_[pointLabel] = p;
        }
 
        if (scaleFactor > 1.0 + small || scaleFactor < 1.0 - small)
        {
            points_ *= scaleFactor;
        }
    }
    else
    {
        FatalError
            << "void starMesh::readPoints() : "
            << "no points in file "
            << pointsFileName
            << abort(FatalError);
    }
}
 
 
// ************************************************************************* //