Gauss.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.0
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     \\/     M anipulation  | For copyright notice see file Copyright
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License
    This file is part of foam-extend.
 
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#include "Gauss.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
defineTypeNameAndDebug(Gauss, 0);
addToRunTimeSelectionTable(RBFFunction, Gauss, dictionary);
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::Gauss::Gauss(const scalar radius)
    :
    RBFFunction(),
    radius_(radius)
{}
 
 
Foam::Gauss::Gauss(const dictionary& dict)
    :
    RBFFunction(),
    radius_(readScalar(dict.lookup("radius")))
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::Gauss::~Gauss()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::scalarField Foam::Gauss::weights
(
    const vectorField& controlPoints,
    const vector& dataPoint
) const
{
    // Algorithmic improvement, Matteo Lombardi.  21/Mar/2011
    scalarField sqrDist = magSqr(controlPoints - dataPoint).ref();
    return Foam::exp(-sqr(radius_) * sqrDist).ref();
}
 
 
// ************************************************************************* //