Merge branch 'upstream/OpenFOAM' into master
[freefoam.git] / src / lagrangian / intermediate / submodels / IO / DataEntry / polynomial / polynomial.C
blob478992f5348a3ad88761c799bcdb11ae8da3ef9e
1 /*---------------------------------------------------------------------------*\
2   =========                 |
3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
4    \\    /   O peration     |
5     \\  /    A nd           | Copyright (C) 2008-2009 OpenCFD Ltd.
6      \\/     M anipulation  |
7 -------------------------------------------------------------------------------
8 License
9     This file is part of OpenFOAM.
11     OpenFOAM is free software; you can redistribute it and/or modify it
12     under the terms of the GNU General Public License as published by the
13     Free Software Foundation; either version 2 of the License, or (at your
14     option) any later version.
16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
19     for more details.
21     You should have received a copy of the GNU General Public License
22     along with OpenFOAM; if not, write to the Free Software Foundation,
23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 \*---------------------------------------------------------------------------*/
27 #include "polynomial.H"
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
31 namespace Foam
33     defineTypeNameAndDebug(polynomial, 0);
36 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
38 Foam::polynomial::polynomial(const word& entryName, Istream& is)
40     DataEntry<scalar>(entryName),
41     coeffs_(is)
43     if (!coeffs_.size())
44     {
45         FatalErrorIn("Foam::polynomial::polynomial(const word&, Istream&)")
46             << "polynomial coefficients for entry " << this->name_
47             << " is invalid (empty)" << nl << exit(FatalError);
48     }
52 Foam::polynomial::polynomial(const polynomial& poly)
54     DataEntry<scalar>(poly),
55     coeffs_(poly.coeffs_)
59 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
61 Foam::polynomial::~polynomial()
65 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
67 Foam::scalar Foam::polynomial::value(const scalar x) const
69     scalar y = 0.0;
70     forAll(coeffs_, i)
71     {
72         y += coeffs_[i].first()*pow(x, coeffs_[i].second());
73     }
75     return y;
79 Foam::scalar Foam::polynomial::integrate(const scalar x1, const scalar x2) const
81     scalar intx = 0.0;
83     forAll(coeffs_, i)
84     {
85         intx +=
86             coeffs_[i].first()/(coeffs_[i].second() + 1)
87            *(
88                 pow(x2, coeffs_[i].second() + 1)
89               - pow(x1, coeffs_[i].second() + 1)
90             );
91     }
93     return intx;
97 // ************************ vim: set sw=4 sts=4 et: ************************ //