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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> |
24 | class gp_Pnt; |
25 | |
26 | |
27 | class Geom_BoundedCurve; |
28 | DEFINE_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. |
45 | class Geom_BoundedCurve : public Geom_Curve |
46 | { |
47 | |
48 | public: |
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 | |
62 | protected: |
63 | |
64 | |
65 | |
66 | |
67 | private: |
68 | |
69 | |
70 | |
71 | |
72 | }; |
73 | |
74 | |
75 | |
76 | |
77 | |
78 | |
79 | |
80 | #endif // _Geom_BoundedCurve_HeaderFile |