linearInterpolationWeights.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2012 OpenFOAM Foundation
    Copyright (C) 2019 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM 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.
 
    OpenFOAM 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 OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::linearInterpolationWeights
 
Description
 
SourceFiles
    linearInterpolationWeights.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef linearInterpolationWeights_H
#define linearInterpolationWeights_H
 
#include "interpolationWeights.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                  Class linearInterpolationWeights Declaration
\*---------------------------------------------------------------------------*/
 
class linearInterpolationWeights
:
    public interpolationWeights
{
    // Private Data
 
        //- Cached index in samples from previous invocation
        mutable label index_;
 
 
    // Private Member Functions
 
        //- Get weights of i and i+1 to calculate integration from t to
        //- samples_[i+1]
        Pair<scalar> integrationWeights(const label i, const scalar t) const;
 
 
public:
 
    //- Runtime type information
    TypeName("linear");
 
 
    // Constructors
 
        //- Construct from components
        explicit linearInterpolationWeights(const scalarField& samples);
 
 
    //- Destructor
    virtual ~linearInterpolationWeights() = default;
 
 
    // Member Functions
 
        //- Calculate weights and indices to calculate t from samples.
        //  \return true if indices changed.
        virtual bool valueWeights
        (
            const scalar t,
            labelList& indices,
            scalarField& weights
        ) const;
 
        //- Calculate weights and indices to calculate integrand of t1..t2
        //- from samples.
        //  \return true if indices changed.
        virtual bool integrationWeights
        (
            const scalar t1,
            const scalar t2,
            labelList& indices,
            scalarField& weights
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //