Gauss.C

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.0
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
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License
    This file is part of foam-extend.
 
    foam-extend 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.
 
    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
 
\*---------------------------------------------------------------------------*/
 
#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();
}
 
 
// ************************************************************************* //