normal_zoneGenerator.C

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License
    This file is part of OpenFOAM.
 
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#include "normal_zoneGenerator.H"
#include "polyMesh.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
    namespace zoneGenerators
    {
        defineTypeNameAndDebug(normal, 0);
        addToRunTimeSelectionTable
        (
            zoneGenerator,
            normal,
            dictionary
        );
    }
}
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::zoneGenerators::normal::normal
(
    const word& name,
    const polyMesh& mesh,
    const dictionary& dict
)
:
    zoneGenerator(name, mesh, dict),
    zoneGenerator_(zoneGenerator::New(mesh, dict)),
    normal_(normalised(dict.lookup<vector>("normal", dimless))),
    tol_(dict.lookup<scalar>("tol", dimless))
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::zoneGenerators::normal::~normal()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::zoneSet Foam::zoneGenerators::normal::generate() const
{
    const zoneSet zs(zoneGenerator_->generate());
    const faceZone& fZone = zs.fZone();
 
    labelList faceIndices(fZone);
    boolList flipMap
    (
        fZone.oriented()
      ? fZone.flipMap()
      : boolList(faceIndices.size(), false)
    );
 
    const vectorField& faceAreas = mesh_.faceAreas();
 
    label fj = 0;
    forAll(faceIndices, fi)
    {
        const label facei = faceIndices[fi];
        const bool flip = flipMap[fi];
        const vector n(normalised(faceAreas[facei]));
        const vector fn(flip ? -n : n);
 
        if (mag(1 - (fn & normal_)) < tol_)
        {
            faceIndices[fj] = facei;
            flipMap[fj] = flip;
            fj++;
        }
    }
 
    faceIndices.setSize(fj);
    flipMap.setSize(fj);
 
    return zoneSet
    (
        new faceZone
        (
            zoneName_,
            faceIndices,
            flipMap,
            mesh_.faceZones(),
            moveUpdate_,
            true
        )
    );
}
 
 
// ************************************************************************* //