0027232: Configuration - fix mblen missing building issue on Android
[occt.git] / src / Hermit / Hermit.hxx
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42cf5bc1 1// Created on: 1997-02-18
2// Created by: Stagiaire Francois DUMONT
3// Copyright (c) 1997-1999 Matra Datavision
4// Copyright (c) 1999-2014 OPEN CASCADE SAS
5//
6// This file is part of Open CASCADE Technology software library.
7//
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
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.
13//
14// Alternatively, this file may be used under the terms of Open CASCADE
15// commercial license or contractual agreement.
16
17#ifndef _Hermit_HeaderFile
18#define _Hermit_HeaderFile
19
20#include <Standard.hxx>
21#include <Standard_DefineAlloc.hxx>
22#include <Standard_Handle.hxx>
23
24#include <Standard_Real.hxx>
25class Geom2d_BSplineCurve;
26class Geom_BSplineCurve;
27
28
29//! This is used to reparameterize Rational BSpline
30//! Curves so that we can concatenate them later to
31//! build C1 Curves It builds and 1D-reparameterizing
32//! function starting from an Hermite interpolation and
33//! adding knots and modifying poles of the 1D BSpline
34//! obtained that way. The goal is to build a(u) so that
35//! if we consider a BSpline curve
36//! N(u)
37//! f(u) = -----
38//! D(u)
39//!
40//! the function a(u)D(u) has value 1 at the umin and umax
41//! and has 0.0e0 derivative value a umin and umax.
42//! The details of the computation occuring in this package
43//! can be found by reading :
44//! " Etude sur la concatenation de NURBS en vue du
45//! balayage de surfaces" PFE n S85 Ensam Lille
46class Hermit
47{
48public:
49
50 DEFINE_STANDARD_ALLOC
51
52
53 //! returns the correct spline a(u) which will
54 //! be multiplicated with BS later.
55 Standard_EXPORT static Handle(Geom2d_BSplineCurve) Solution (const Handle(Geom_BSplineCurve)& BS, const Standard_Real TolPoles = 0.000001, const Standard_Real TolKnots = 0.000001);
56
57 //! returns the correct spline a(u) which will
58 //! be multiplicated with BS later.
59 Standard_EXPORT static Handle(Geom2d_BSplineCurve) Solution (const Handle(Geom2d_BSplineCurve)& BS, const Standard_Real TolPoles = 0.000001, const Standard_Real TolKnots = 0.000001);
60
61 //! returns the knots to insert to a(u) to
62 //! stay with a constant sign and in the
63 //! tolerances.
64 Standard_EXPORT static void Solutionbis (const Handle(Geom_BSplineCurve)& BS, Standard_Real& Knotmin, Standard_Real& Knotmax, const Standard_Real TolPoles = 0.000001, const Standard_Real TolKnots = 0.000001);
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69protected:
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75private:
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81};
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89#endif // _Hermit_HeaderFile