152 lines
4.1 KiB
C
152 lines
4.1 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 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 "LinearInterpolator1D.H"
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#include "error.H"
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#include "Switch.H"
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// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
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// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
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bool Foam::LinearInterpolator1D::_checkSorted(const scalarField& grid)
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{
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Switch sorted = true;
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for (label i = 1; i < srcGrid_.size(); i++)
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{
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if (grid[i-1] >= grid[i])
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{
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sorted = false;
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break;
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}
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}
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return sorted;
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}
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// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::LinearInterpolator1D::LinearInterpolator1D()
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{}
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Foam::LinearInterpolator1D::LinearInterpolator1D(const scalarField& srcGrid, const scalarField& dstGrid)
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:
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srcGrid_(srcGrid),
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dstGrid_(dstGrid),
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idxHigh_(dstGrid.size()),
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coef_(dstGrid.size())
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{
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// Check dstGrid and srcGrid are intervals
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if (!(dstGrid_.first() < dstGrid_.last() && srcGrid_.first() < srcGrid_.last()))
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{
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FatalErrorInFunction
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<< "Invalid grids"
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<< abort(FatalError);
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}
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// Check dstGrid lies within srcGrid
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if (dstGrid_.first() < srcGrid_.first() || srcGrid_.last() < dstGrid_.last())
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{
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FatalErrorInFunction
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<< "Extrapolation attempted"
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<< abort(FatalError);
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}
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// Check srcGrid and dstGrid are sorted
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if (!(_checkSorted(dstGrid_) && _checkSorted(srcGrid_)))
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{
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FatalErrorInFunction
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<< "Unsorted grids"
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<< abort(FatalError);
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}
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forAll (dstGrid_, j)
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{
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for (label i = 1; i < srcGrid_.size(); i++)
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{
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if (srcGrid_[i] >= dstGrid_[j])
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{
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idxHigh_[j] = i;
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coef_[j] = (srcGrid_[i] - dstGrid_[j]) / (srcGrid_[i] - srcGrid_[i-1]);
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break;
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}
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}
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}
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}
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Foam::LinearInterpolator1D::LinearInterpolator1D(const LinearInterpolator1D&)
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::LinearInterpolator1D::~LinearInterpolator1D()
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{}
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// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
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void Foam::LinearInterpolator1D::interpolate(const scalarField& src, scalarField& dst)
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{
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forAll (dst, i)
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{
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dst[i] = coef_[i]*src[idxHigh_[i]-1] + (1.0-coef_[i])*src[idxHigh_[i]];
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}
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return;
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}
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// * * * * * * * * * * * * * * Member Operators * * * * * * * * * * * * * * //
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void Foam::LinearInterpolator1D::operator=(const LinearInterpolator1D& rhs)
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{
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// Check for assignment to self
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if (this == &rhs)
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{
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FatalErrorInFunction
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<< "Attempted assignment to self"
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<< abort(FatalError);
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}
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}
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// * * * * * * * * * * * * * * Friend Functions * * * * * * * * * * * * * * //
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// * * * * * * * * * * * * * * Friend Operators * * * * * * * * * * * * * * //
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// ************************************************************************* //
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