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https://develop.openfoam.com/Development/openfoam.git
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152 lines
3.9 KiB
C
152 lines
3.9 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) 1991-2007 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 the
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Free Software Foundation; either version 2 of the License, or (at your
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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, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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\*---------------------------------------------------------------------------*/
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#include "Table.H"
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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template<class Type>
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Foam::Table<Type>::Table
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(
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const word& entryName,
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const dictionary& dict
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)
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:
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DataEntry<Type>(typeName, entryName, dict),
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table_(this->dict_.lookup("table"))
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{
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if (!table_.size())
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{
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FatalErrorIn
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(
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"Foam::Table<Type>::Table"
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"("
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"const word& entryName,"
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"const dictionary& dict"
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")"
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) << "Table is invalid (empty)" << nl
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<< exit(FatalError);
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}
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Info<< table_;
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}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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template<class Type>
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Foam::Table<Type>::~Table()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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template<class Type>
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Type Foam::Table<Type>::value(const scalar x) const
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{
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// Return zero if out of bounds
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if ((x > table_[table_.size()-1].first()) || (x < table_[0].first()))
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{
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return pTraits<Type>::zero;
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}
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label i = 0;
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while ((table_[i].first() < x) && (i < table_.size()))
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{
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i++;
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}
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if (i == 0)
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{
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return table_[0].second();
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}
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else if (i == table_.size() - 1)
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{
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return table_[i-1].second();
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}
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else
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{
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return
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(x - table_[i-1].first())/(table_[i].first() - table_[i-1].first())
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* (table_[i].second() - table_[i-1].second())
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+ table_[i-1].second();
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}
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}
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template<class Type>
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Type Foam::Table<Type>::integrate(const scalar x1, const scalar x2) const
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{
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// Initialise return value
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Type sum = pTraits<Type>::zero;
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// Return zero if out of bounds
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if ((x1 > table_[table_.size()-1].first()) || (x2 < table_[0].first()))
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{
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return sum;
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}
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// Find start index
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label id1 = 0;
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while ((table_[id1].first() < x1) && (id1 < table_.size()))
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{
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id1++;
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}
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// Find end index
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label id2 = table_.size() - 1;
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while ((table_[id2].first() > x2) && (id2 >= 1))
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{
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id2--;
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}
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// Integrate table body
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for (label i=id1; i<id2; i++)
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{
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sum +=
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(table_[i].second() + table_[i+1].second())
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* (table_[i+1].first() - table_[i].first());
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}
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sum *= 0.5;
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// Add table ends
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if (id1 > 0)
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{
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sum += 0.5
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* (value(x1) + table_[id1].second())
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* (table_[id1].first() - x1);
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}
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if (id2 < table_.size() - 1)
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{
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sum += 0.5
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* (table_[id2].second() + value(x2))
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* (x2 - table_[id2].first());
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}
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return sum;
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}
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// ************************************************************************* //
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