arcUniform.C

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License
    This file is part of OpenFOAM.
 
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#include "arcUniform.H"
#include "sampledSet.H"
#include "meshSearch.H"
#include "DynamicList.H"
#include "polyMesh.H"
#include "addToRunTimeSelectionTable.H"
#include "word.H"
#include "points.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace sampledSets
{
    defineTypeNameAndDebug(arcUniform, 0);
    addToRunTimeSelectionTable(sampledSet, arcUniform, word);
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::sampledSets::arcUniform::calcSamples
(
    DynamicList<point>& samplingPositions,
    DynamicList<scalar>& samplingDistances,
    DynamicList<label>& samplingSegments,
    DynamicList<label>& samplingCells,
    DynamicList<label>& samplingFaces
) const
{
    // Get the coordinate system
    const vector axis1 = radial_ - (radial_ & normal_)*normal_;
    const vector axis2 = normal_ ^ axis1;
    const scalar radius = mag(axis1);
 
    // Compute all point locations
    const scalarField ts(scalarList(identityMap(nPoints_))/(nPoints_ - 1));
    const scalarField theta((1 - ts)*startAngle_ + ts*endAngle_);
    const scalarField c(cos(theta)), s(sin(theta));
    const pointField points(centre_ + c*axis1 + s*axis2);
 
    // Calculate the sampling topology
    points::calcSamples
    (
        mesh(),
        searchEngine(),
        points,
        samplingPositions,
        samplingDistances,
        samplingSegments,
        samplingCells,
        samplingFaces
    );
 
    // Overwrite the distances
    forAll(samplingPositions, i)
    {
        const vector v = samplingPositions[i] - centre_;
        const scalar theta = atan2(v & axis2, v & axis1);
        samplingDistances[i] = radius*theta;
    }
}
 
 
void Foam::sampledSets::arcUniform::genSamples()
{
    DynamicList<point> samplingPositions;
    DynamicList<scalar> samplingDistances;
    DynamicList<label> samplingSegments;
    DynamicList<label> samplingCells;
    DynamicList<label> samplingFaces;
 
    calcSamples
    (
        samplingPositions,
        samplingDistances,
        samplingSegments,
        samplingCells,
        samplingFaces
    );
 
    samplingPositions.shrink();
    samplingDistances.shrink();
    samplingSegments.shrink();
    samplingCells.shrink();
    samplingFaces.shrink();
 
    setSamples
    (
        samplingPositions,
        samplingDistances,
        samplingSegments,
        samplingCells,
        samplingFaces
    );
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::sampledSets::arcUniform::arcUniform
(
    const word& name,
    const polyMesh& mesh,
    const meshSearch& searchEngine,
    const dictionary& dict
)
:
    sampledSet(name, mesh, searchEngine, dict),
    centre_(dict.lookup("centre")),
    normal_(normalised(dict.lookup<vector>("normal"))),
    radial_(dict.lookup<vector>("radial")),
    startAngle_(dict.lookup<scalar>("startAngle")),
    endAngle_(dict.lookup<scalar>("endAngle")),
    nPoints_(dict.lookup<scalar>("nPoints"))
{
    genSamples();
}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::sampledSets::arcUniform::~arcUniform()
{}
 
 
// ************************************************************************* //