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b311480e 1// Created on: 1998-09-22
2// Created by: Philippe MANGIN
3// Copyright (c) 1998-1999 Matra Datavision
b311480e 5//
973c2be1 6// This file is part of Open CASCADE Technology software library.
b311480e 7//
d5f74e42 8// This library is free software; you can redistribute it and/or modify it under
9// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1 10// by the Free Software Foundation, with special exception defined in the file
11// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12// distribution for complete text of the license and disclaimer of any warranty.
b311480e 13//
973c2be1 14// Alternatively, this file may be used under the terms of Open CASCADE
15// commercial license or contractual agreement.
7fd59977 16
42cf5bc1 17
18#include <GeomLib_PolyFunc.hxx>
7fd59977 19#include <math_Vector.hxx>
42cf5bc1 20#include <PLib.hxx>
7fd59977 21
22GeomLib_PolyFunc::GeomLib_PolyFunc(const math_Vector& Coeffs)
23 :myCoeffs(1, Coeffs.Length()-1)
24{ // On construit le polynome derive
25 for (Standard_Integer ii=1; ii<=myCoeffs.Length(); ii++)
26 myCoeffs(ii) = ii*Coeffs(ii+1);
27}
28
29 Standard_Boolean GeomLib_PolyFunc::Value(const Standard_Real X,
30 Standard_Real& F)
31{
32 Standard_Real * coeff = &myCoeffs(1);
33 Standard_Real * ff = &F;
34 PLib::EvalPolynomial(X, 0, myCoeffs.Length()-1, 1, coeff[0], ff[0]);
35 return Standard_True;
36}
37
38 Standard_Boolean GeomLib_PolyFunc::Derivative(const Standard_Real X,
39 Standard_Real& D)
40{
41 Standard_Real * coeff = &myCoeffs(1);
42 math_Vector Aux(1, 2);
43 Standard_Real * ff = &Aux(1);
44 PLib::EvalPolynomial(X, 1, myCoeffs.Length()-1, 1, coeff[0], ff[0]);
45 D = Aux(2);
46 return Standard_True;
47}
48
49 Standard_Boolean GeomLib_PolyFunc::Values(const Standard_Real X,
50 Standard_Real& F,
51 Standard_Real& D)
52{
53 Standard_Real * coeff = &myCoeffs(1);
54 math_Vector Aux(1, 2);
55 Standard_Real * ff = &Aux(1);
56 PLib::EvalPolynomial(X, 1, myCoeffs.Length()-1, 1, coeff[0], ff[0]);
57 F = Aux(1);
58 D = Aux(2);
59 return Standard_True;
60}