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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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::FixedPolynomial
Description
Fixed-size polynomial. Evaluation is done using Horner's method to minimise
the number of operations.
SourceFiles
FixedPolynomial.C
\*---------------------------------------------------------------------------*/
#ifndef FixedPolynomial_H
#define FixedPolynomial_H
#include "Function1.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class FixedPolynomial Declaration
\*---------------------------------------------------------------------------*/
template<class T, uint8_t PN>
class FixedPolynomial
:
public VectorSpace<FixedPolynomial<T, PN>, T, PN>
{
public:
// Constructors
//- Default construct
FixedPolynomial();
//- Construct zero
FixedPolynomial(const zero);
//- Construct from C-array of coefficients
FixedPolynomial(const T (&coeffs)[PN]);
//- Construct from a list of coefficients
FixedPolynomial(const UList<T>& coeffs);
//- Construct from a stream
FixedPolynomial(Istream& is);
//- Construct from a dictionary
FixedPolynomial
(
const char* symbols,
const Function1s::unitSets& units,
const dictionary& dict
);
// Member Functions
//- Return the value at a coordinate
T value(const scalar x) const;
//- Return the value of the derivative at a coordinate
T derivative(const scalar x) const;
//- Return the value of the (indefinite) integral at a coordinate
T integral(const scalar x) const;
//- Return the value of the (definite) integral between coordinates
T integral(const scalar x0, const scalar x1) const;
//- Return the polynomial of the (definite) integral from a coordinate
FixedPolynomial<T, PN + 1> integralPolynomial(const scalar x) const;
//- Return info proxy
inline InfoProxy<FixedPolynomial<T, PN>> info() const
{
return *this;
}
//- Write to stream
void write
(
const char* symbols,
const Function1s::unitSets& units,
Ostream& os
) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
//- Convert to standard units after reading
template<class T, uint8_t PN>
void convert
(
FixedPolynomial<T, PN>& poly,
const Function1s::unitSets& units,
const unitSet::makeStandardOp&
);
//- Convert to user units before writing
template<class T, uint8_t PN>
void convert
(
FixedPolynomial<T, PN>& poly,
const Function1s::unitSets& units,
const unitSet::makeUserOp&
);
//- Write info to stream
template<class T, uint8_t PN>
Ostream& operator<<
(
Ostream&,
const InfoProxy<FixedPolynomial<T, PN>>&
);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#ifdef NoRepository
#include "FixedPolynomial.C"
#endif
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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