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95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2004-2011 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "exponential.H"
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#include "addToRunTimeSelectionTable.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace distributionModels
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{
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defineTypeNameAndDebug(exponential, 0);
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addToRunTimeSelectionTable(distributionModel, exponential, dictionary);
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}
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::distributionModels::exponential::exponential
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(
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const dictionary& dict,
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cachedRandom& rndGen
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)
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:
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distributionModel(typeName, dict, rndGen),
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minValue_(readScalar(distributionModelDict_.lookup("minValue"))),
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maxValue_(readScalar(distributionModelDict_.lookup("maxValue"))),
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lambda_(readScalar(distributionModelDict_.lookup("lambda")))
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{
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check();
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}
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Foam::distributionModels::exponential::exponential(const exponential& p)
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:
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distributionModel(p),
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minValue_(p.minValue_),
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maxValue_(p.maxValue_),
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lambda_(p.lambda_)
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::distributionModels::exponential::~exponential()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::scalar Foam::distributionModels::exponential::sample() const
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{
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scalar y = rndGen_.sample01<scalar>();
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scalar K = exp(-lambda_*maxValue_) - exp(-lambda_*minValue_);
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return -(1.0/lambda_)*log(exp(-lambda_*minValue_) + y*K);
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}
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Foam::scalar Foam::distributionModels::exponential::minValue() const
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{
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return minValue_;
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}
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Foam::scalar Foam::distributionModels::exponential::maxValue() const
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{
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return maxValue_;
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}
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// ************************************************************************* //
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