vtkPVFoamMeshSet.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 2011-2025 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 "vtkPVFoam.H"
#include "vtkOpenFOAMPoints.H"
 
// OpenFOAM includes
#include "fvMesh.H"
#include "faceSet.H"
#include "pointSet.H"
 
// VTK includes
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkCellArray.h"
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
vtkPolyData* Foam::vtkPVFoam::faceSetVTKMesh
(
    const fvMesh& mesh,
    const faceSet& fSet
)
{
    vtkPolyData* vtkmesh = vtkPolyData::New();
 
    // Construct primitivePatch of faces in fSet.
    const faceList& meshFaces = mesh.faces();
    faceList patchFaces(fSet.size());
    label facei = 0;
    forAllConstIter(faceSet, fSet, iter)
    {
        patchFaces[facei++] = meshFaces[iter.key()];
    }
    primitiveFacePatch p(patchFaces, mesh.points());
 
    // The balance of this routine should be identical to patchVTKMesh
 
    // Convert OpenFOAM mesh vertices to VTK
    const pointField& points = p.localPoints();
 
    vtkPoints* vtkpoints = vtkPoints::New();
    vtkpoints->Allocate(points.size());
    forAll(points, i)
    {
        vtkInsertNextOpenFOAMPoint(vtkpoints, points[i]);
    }
    vtkmesh->SetPoints(vtkpoints);
    vtkpoints->Delete();
 
    // Add faces as polygons
    const faceList& faces = p.localFaces();
 
    vtkCellArray* vtkcells = vtkCellArray::New();
    vtkcells->Allocate(faces.size());
 
    DynamicList<vtkIdType> nodeIds(4);
 
    forAll(faces, facei)
    {
        const face& f = faces[facei];
 
        nodeIds.resize(f.size());
        forAll(f, fp)
        {
            nodeIds[fp] = f[fp];
        }
 
        vtkcells->InsertNextCell(f.size(), nodeIds.data());
    }
 
    vtkmesh->SetPolys(vtkcells);
    vtkcells->Delete();
 
    return vtkmesh;
}
 
 
vtkPolyData* Foam::vtkPVFoam::pointSetVTKMesh
(
    const fvMesh& mesh,
    const pointSet& pSet
)
{
    vtkPolyData* vtkmesh = vtkPolyData::New();
 
    const pointField& meshPoints = mesh.points();
 
    vtkPoints* vtkpoints = vtkPoints::New();
    vtkpoints->Allocate(pSet.size());
 
    forAllConstIter(pointSet, pSet, iter)
    {
        vtkInsertNextOpenFOAMPoint(vtkpoints, meshPoints[iter.key()]);
    }
 
    vtkmesh->SetPoints(vtkpoints);
    vtkpoints->Delete();
 
    return vtkmesh;
}
 
 
// ************************************************************************* //