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_BSplineCurves_HeaderFile
18 #define _GeomFill_BSplineCurves_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <GeomFill_FillingStyle.hxx>
25 class Geom_BSplineSurface;
26 class Standard_ConstructionError;
27 class Geom_BSplineCurve;
30 //! An algorithm for constructing a BSpline surface filled
31 //! from contiguous BSpline curves which form its boundaries.
32 //! The algorithm accepts two, three or four BSpline
33 //! curves as the boundaries of the target surface.
34 //! A range of filling styles - more or less rounded, more
35 //! or less flat - is available.
36 //! A BSplineCurves object provides a framework for:
37 //! - defining the boundaries, and the filling style of the surface
38 //! - implementing the construction algorithm
39 //! - consulting the result.
41 //! Some problems may show up with rational curves.
42 class GeomFill_BSplineCurves
49 //! Constructs a default BSpline surface framework.
50 Standard_EXPORT GeomFill_BSplineCurves();
52 Standard_EXPORT GeomFill_BSplineCurves(const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const Handle(Geom_BSplineCurve)& C3, const Handle(Geom_BSplineCurve)& C4, const GeomFill_FillingStyle Type);
54 Standard_EXPORT GeomFill_BSplineCurves(const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const Handle(Geom_BSplineCurve)& C3, const GeomFill_FillingStyle Type);
56 //! Constructs a framework for building a BSpline surface from either
57 //! - the four contiguous BSpline curves, C1, C2, C3 and C4, or
58 //! - the three contiguous BSpline curves, C1, C2 and C3, or
59 //! - the two contiguous BSpline curves, C1 and C2.
60 //! The type of filling style Type to be used is one of:
61 //! - GeomFill_Stretch - the style with the flattest patch
62 //! - GeomFill_Coons - a rounded style of patch with
63 //! less depth than that of Curved
64 //! - GeomFill_Curved - the style with the most rounded
65 //! patch.Constructs a framework for building a BSpline
66 //! surface common to the two BSpline curves, C1 and C2.
68 //! Standard_ConstructionError if the curves are not contiguous.
69 Standard_EXPORT GeomFill_BSplineCurves(const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const GeomFill_FillingStyle Type);
71 //! if the curves cannot be joined
72 Standard_EXPORT void Init (const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const Handle(Geom_BSplineCurve)& C3, const Handle(Geom_BSplineCurve)& C4, const GeomFill_FillingStyle Type);
74 //! if the curves cannot be joined
75 Standard_EXPORT void Init (const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const Handle(Geom_BSplineCurve)& C3, const GeomFill_FillingStyle Type);
77 //! Initializes or reinitializes this algorithm with two, three,
78 //! or four curves - C1, C2, C3, and C4 - and Type, one
79 //! of the following filling styles:
80 //! - GeomFill_Stretch - the style with the flattest patch
81 //! - GeomFill_Coons - a rounded style of patch with
82 //! less depth than that of Curved
83 //! - GeomFill_Curved - the style with the most rounded patch.
85 //! Standard_ConstructionError if the curves are not contiguous.
86 Standard_EXPORT void Init (const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const GeomFill_FillingStyle Type);
88 //! Returns the BSpline surface Surface resulting from
89 //! the computation performed by this algorithm.
90 const Handle(Geom_BSplineSurface)& Surface() const;
105 Handle(Geom_BSplineSurface) mySurface;
111 #include <GeomFill_BSplineCurves.lxx>
117 #endif // _GeomFill_BSplineCurves_HeaderFile