include/opencascade/GeomFill_BSplineCurves.hxx

0001 // Created on: 1993-10-06
0002 // Created by: Bruno DUMORTIER
0003 // Copyright (c) 1993-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _GeomFill_BSplineCurves_HeaderFile
0018 #define _GeomFill_BSplineCurves_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <GeomFill_FillingStyle.hxx>
0025 class Geom_BSplineSurface;
0026 class Geom_BSplineCurve;
0027
0028
0029 //! An algorithm for constructing a BSpline surface filled
0030 //! from contiguous BSpline curves which form its boundaries.
0031 //! The algorithm accepts two, three or four BSpline
0032 //! curves as the boundaries of the target surface.
0033 //! A range of filling styles - more or less rounded, more
0034 //! or less flat - is available.
0035 //! A BSplineCurves object provides a framework for:
0036 //! -   defining the boundaries, and the filling style of the surface
0037 //! -   implementing the construction algorithm
0038 //! -   consulting the result.
0039 //! Warning
0040 //! Some problems may show up with rational curves.
0041 class GeomFill_BSplineCurves
0042 {
0043 public:
0044
0045   DEFINE_STANDARD_ALLOC
0046
0047
0048   //! Constructs a default BSpline surface framework.
0049   Standard_EXPORT GeomFill_BSplineCurves();
0050
0051   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);
0052
0053   Standard_EXPORT GeomFill_BSplineCurves(const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const Handle(Geom_BSplineCurve)& C3, const GeomFill_FillingStyle Type);
0054
0055   //! Constructs a framework for building a BSpline surface from either
0056   //! -   the four contiguous BSpline curves, C1, C2, C3 and C4, or
0057   //! -   the three contiguous BSpline curves, C1, C2 and C3, or
0058   //! -   the two contiguous BSpline curves, C1 and C2.
0059   //! The type of filling style Type to be used is one of:
0060   //! -   GeomFill_Stretch - the style with the flattest patch
0061   //! -   GeomFill_Coons - a rounded style of patch with
0062   //! less depth than that of Curved
0063   //! -   GeomFill_Curved - the style with the most rounded
0064   //! patch.Constructs a framework for building a BSpline
0065   //! surface common to the two BSpline curves, C1 and C2.
0066   //! Exceptions
0067   //! Standard_ConstructionError if the curves are not contiguous.
0068   Standard_EXPORT GeomFill_BSplineCurves(const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const GeomFill_FillingStyle Type);
0069
0070   //! if the curves cannot be joined
0071   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);
0072
0073   //! if the curves cannot be joined
0074   Standard_EXPORT void Init (const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const Handle(Geom_BSplineCurve)& C3, const GeomFill_FillingStyle Type);
0075
0076   //! Initializes or reinitializes this algorithm with two, three,
0077   //! or four curves - C1, C2, C3, and C4 - and Type, one
0078   //! of the following filling styles:
0079   //! -   GeomFill_Stretch - the style with the flattest patch
0080   //! -   GeomFill_Coons - a rounded style of patch with
0081   //! less depth than that of Curved
0082   //! -   GeomFill_Curved - the style with the most rounded patch.
0083   //! Exceptions
0084   //! Standard_ConstructionError if the curves are not contiguous.
0085   Standard_EXPORT void Init (const Handle(Geom_BSplineCurve)& C1, const Handle(Geom_BSplineCurve)& C2, const GeomFill_FillingStyle Type);
0086
0087   //! Returns the BSpline surface Surface resulting from
0088   //! the computation performed by this algorithm.
0089     const Handle(Geom_BSplineSurface)& Surface() const;
0090
0091
0092
0093
0094 protected:
0095
0096
0097
0098
0099
0100 private:
0101
0102
0103
0104   Handle(Geom_BSplineSurface) mySurface;
0105
0106
0107 };
0108
0109
0110 #include <GeomFill_BSplineCurves.lxx>
0111
0112
0113
0114
0115
0116 #endif // _GeomFill_BSplineCurves_HeaderFile