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// File: GeomLib_PolyFunc.cxx
// Created: Tue Sep 22 16:37:48 1998
// Author: Philippe MANGIN
// <pmn@sgi29>
#include <GeomLib_PolyFunc.ixx>
#include <PLib.hxx>
#include <math_Vector.hxx>
GeomLib_PolyFunc::GeomLib_PolyFunc(const math_Vector& Coeffs)
:myCoeffs(1, Coeffs.Length()-1)
{ // On construit le polynome derive
for (Standard_Integer ii=1; ii<=myCoeffs.Length(); ii++)
myCoeffs(ii) = ii*Coeffs(ii+1);
}
Standard_Boolean GeomLib_PolyFunc::Value(const Standard_Real X,
Standard_Real& F)
{
Standard_Real * coeff = &myCoeffs(1);
Standard_Real * ff = &F;
PLib::EvalPolynomial(X, 0, myCoeffs.Length()-1, 1, coeff[0], ff[0]);
return Standard_True;
}
Standard_Boolean GeomLib_PolyFunc::Derivative(const Standard_Real X,
Standard_Real& D)
{
Standard_Real * coeff = &myCoeffs(1);
math_Vector Aux(1, 2);
Standard_Real * ff = &Aux(1);
PLib::EvalPolynomial(X, 1, myCoeffs.Length()-1, 1, coeff[0], ff[0]);
D = Aux(2);
return Standard_True;
}
Standard_Boolean GeomLib_PolyFunc::Values(const Standard_Real X,
Standard_Real& F,
Standard_Real& D)
{
Standard_Real * coeff = &myCoeffs(1);
math_Vector Aux(1, 2);
Standard_Real * ff = &Aux(1);
PLib::EvalPolynomial(X, 1, myCoeffs.Length()-1, 1, coeff[0], ff[0]);
F = Aux(1);
D = Aux(2);
return Standard_True;
}
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