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002e7d7b06
This is faster than the library functionality that it replaces, as it allows the compiler to do inlining. It also does not utilise any static state so generators do not interfere with each other. It is also faster than the the array lookup in cachedRandom. The cachedRandom class therefore offers no advantage over Random and has been removed.
65 lines
2.1 KiB
C
65 lines
2.1 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) 2016-2018 OpenFOAM Foundation
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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 "volFields.H"
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#include "Random.H"
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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template<class Type>
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bool Foam::functionObjects::randomise::calcRandomised()
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{
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typedef GeometricField<Type, fvPatchField, volMesh> VolFieldType;
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if (foundObject<VolFieldType>(fieldName_))
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{
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const VolFieldType& field = lookupObject<VolFieldType>(fieldName_);
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resultName_ = fieldName_ + "Random";
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tmp<VolFieldType> rfieldt(new VolFieldType(field));
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VolFieldType& rfield = rfieldt.ref();
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Random rand(1234567);
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forAll(field, celli)
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{
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Type rndPert = rand.sample01<Type>();
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rndPert = 2.0*rndPert - pTraits<Type>::one;
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rndPert /= mag(rndPert);
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rfield[celli] += magPerturbation_*rndPert;
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}
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return store(resultName_, rfieldt);
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}
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else
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{
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return false;
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}
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}
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// ************************************************************************* //
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