1 // Created on: 1993-10-06
2 // Created by: Bruno DUMORTIER
3 // Copyright (c) 1993-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
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.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _GeomFill_BezierCurves_HeaderFile
18 #define _GeomFill_BezierCurves_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <GeomFill_FillingStyle.hxx>
25 class Geom_BezierSurface;
26 class Standard_ConstructionError;
27 class Geom_BezierCurve;
30 //! This class provides an algorithm for constructing a Bezier surface filled from
31 //! contiguous Bezier curves which form its boundaries.
32 //! The algorithm accepts two, three or four Bezier curves
33 //! as the boundaries of the target surface.
34 //! A range of filling styles - more or less rounded, more or less flat - is available.
35 //! A BezierCurves object provides a framework for:
36 //! - defining the boundaries, and the filling style of the surface
37 //! - implementing the construction algorithm
38 //! - consulting the result.
40 //! Some problems may show up with rational curves.
41 class GeomFill_BezierCurves
48 //! Constructs an empty framework for building a Bezier
49 //! surface from contiguous Bezier curves.
50 //! You use the Init function to define the boundaries of the surface.
51 Standard_EXPORT GeomFill_BezierCurves();
53 //! Constructs a framework for building a Bezier surface
54 //! from the four contiguous Bezier curves, C1, C2, C3 and C4
55 //! Raises Standard_ConstructionError if the curves are not contiguous.
56 Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const Handle(Geom_BezierCurve)& C3, const Handle(Geom_BezierCurve)& C4, const GeomFill_FillingStyle Type);
58 //! Constructs a framework for building a Bezier surface
59 //! from the three contiguous Bezier curves, C1, C2 and C3
60 //! Raises Standard_ConstructionError if the curves are not contiguous.
61 Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const Handle(Geom_BezierCurve)& C3, const GeomFill_FillingStyle Type);
63 //! Constructs a framework for building a Bezier surface
64 //! from the two contiguous Bezier curves, C1 and C2
65 //! Raises Standard_ConstructionError if the curves are not contiguous.
66 Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const GeomFill_FillingStyle Type);
68 //! if the curves cannot be joined
69 Standard_EXPORT void Init (const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const Handle(Geom_BezierCurve)& C3, const Handle(Geom_BezierCurve)& C4, const GeomFill_FillingStyle Type);
71 //! if the curves cannot be joined
72 Standard_EXPORT void Init (const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const Handle(Geom_BezierCurve)& C3, const GeomFill_FillingStyle Type);
74 //! Initializes or reinitializes this algorithm with two, three,
75 //! or four curves - C1, C2, C3, and C4 - and Type, one
76 //! of the following filling styles:
77 //! - GeomFill_Stretch - the style with the flattest patch
78 //! - GeomFill_Coons - a rounded style of patch with
79 //! less depth than that of Curved
80 //! - GeomFill_Curved - the style with the most rounded patch.
82 //! Standard_ConstructionError if the curves are not contiguous.
83 Standard_EXPORT void Init (const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const GeomFill_FillingStyle Type);
85 //! Returns the Bezier surface resulting from the
86 //! computation performed by this algorithm.
87 const Handle(Geom_BezierSurface)& Surface() const;
102 Handle(Geom_BezierSurface) mySurface;
108 #include <GeomFill_BezierCurves.lxx>
114 #endif // _GeomFill_BezierCurves_HeaderFile