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[occt.git] / src / Geom / Geom_BoundedCurve.hxx
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42cf5bc1 1// Created on: 1993-03-10
2// Created by: JCV
3// Copyright (c) 1993-1999 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 _Geom_BoundedCurve_HeaderFile
18#define _Geom_BoundedCurve_HeaderFile
19
20#include <Standard.hxx>
21#include <Standard_Type.hxx>
22
23#include <Geom_Curve.hxx>
24class gp_Pnt;
25
26
27class Geom_BoundedCurve;
28DEFINE_STANDARD_HANDLE(Geom_BoundedCurve, Geom_Curve)
29
30//! The abstract class BoundedCurve describes the
31//! common behavior of bounded curves in 3D space. A
32//! bounded curve is limited by two finite values of the
33//! parameter, termed respectively "first parameter" and
34//! "last parameter". The "first parameter" gives the "start
35//! point" of the bounded curve, and the "last parameter"
36//! gives the "end point" of the bounded curve.
37//! The length of a bounded curve is finite.
38//! The Geom package provides three concrete classes of bounded curves:
39//! - two frequently used mathematical formulations of complex curves:
40//! - Geom_BezierCurve,
41//! - Geom_BSplineCurve, and
42//! - Geom_TrimmedCurve to trim a curve, i.e. to only
43//! take part of the curve limited by two values of the
44//! parameter of the basis curve.
45class Geom_BoundedCurve : public Geom_Curve
46{
47
48public:
49
50
51 //! Returns the end point of the curve.
52 Standard_EXPORT virtual gp_Pnt EndPoint() const = 0;
53
54 //! Returns the start point of the curve.
55 Standard_EXPORT virtual gp_Pnt StartPoint() const = 0;
56
57
58
59
60 DEFINE_STANDARD_RTTI(Geom_BoundedCurve,Geom_Curve)
61
62protected:
63
64
65
66
67private:
68
69
70
71
72};
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79
80#endif // _Geom_BoundedCurve_HeaderFile