splineInterpolationWeights.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2012-2015 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
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    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::splineInterpolationWeights
 
Description
    Catmull-Rom spline interpolation.
 
SourceFiles
    splineInterpolationWeights.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef splineInterpolationWeights_H
#define splineInterpolationWeights_H
 
#include "interpolationWeights.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                  Class splineInterpolationWeights Declaration
\*---------------------------------------------------------------------------*/
 
class splineInterpolationWeights
:
    public interpolationWeights
{
    // Private Data
 
        //- Cached index in samples from previous invocation
        mutable label index_;
 
 
public:
 
    //- Runtime type information
    TypeName("spline");
 
 
    // Constructors
 
        //- Construct from components. By default make sure samples are
        //  equidistant.
        explicit splineInterpolationWeights
        (
            const scalarField& samples,
            const bool checkEqualDistance = true
        );
 
 
    //- Destructor
    virtual ~splineInterpolationWeights() = 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
        {
            NotImplemented;
            return false;
        }
 
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //