include/opencascade/GeomFill_BezierCurves.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_BezierCurves_HeaderFile
0018 #define _GeomFill_BezierCurves_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_BezierSurface;
0026 class Geom_BezierCurve;
0027
0028
0029 //! This class provides an algorithm for constructing a Bezier surface filled from
0030 //! contiguous Bezier curves which form its boundaries.
0031 //! The algorithm accepts two, three or four Bezier curves
0032 //! as the boundaries of the target surface.
0033 //! A range of filling styles - more or less rounded, more or less flat - is available.
0034 //! A BezierCurves object provides a framework for:
0035 //! -   defining the boundaries, and the filling style of the surface
0036 //! -   implementing the construction algorithm
0037 //! -   consulting the result.
0038 //! Warning
0039 //! Some problems may show up with rational curves.
0040 class GeomFill_BezierCurves
0041 {
0042 public:
0043
0044   DEFINE_STANDARD_ALLOC
0045
0046
0047   //! Constructs an empty framework for building a Bezier
0048   //! surface from contiguous Bezier curves.
0049   //! You use the Init function to define the boundaries of the surface.
0050   Standard_EXPORT GeomFill_BezierCurves();
0051
0052   //! Constructs a framework for building a Bezier surface
0053   //! from the four contiguous Bezier curves, C1, C2, C3 and C4
0054   //! Raises Standard_ConstructionError if the curves are not contiguous.
0055   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);
0056
0057   //! Constructs a framework for building a Bezier surface
0058   //! from the three contiguous Bezier curves, C1, C2 and C3
0059   //! Raises Standard_ConstructionError if the curves are not contiguous.
0060   Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const Handle(Geom_BezierCurve)& C3, const GeomFill_FillingStyle Type);
0061
0062   //! Constructs a framework for building a Bezier surface
0063   //! from the two contiguous Bezier curves, C1 and C2
0064   //! Raises Standard_ConstructionError if the curves are not contiguous.
0065   Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const GeomFill_FillingStyle Type);
0066
0067   //! if the curves cannot be joined
0068   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);
0069
0070   //! if the curves cannot be joined
0071   Standard_EXPORT void Init (const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const Handle(Geom_BezierCurve)& C3, const GeomFill_FillingStyle Type);
0072
0073   //! Initializes or reinitializes this algorithm with two, three,
0074   //! or four curves - C1, C2, C3, and C4 - and Type, one
0075   //! of the following filling styles:
0076   //! -   GeomFill_Stretch - the style with the flattest patch
0077   //! -   GeomFill_Coons - a rounded style of patch with
0078   //! less depth than that of Curved
0079   //! -   GeomFill_Curved - the style with the most rounded patch.
0080   //! Exceptions
0081   //! Standard_ConstructionError if the curves are not contiguous.
0082   Standard_EXPORT void Init (const Handle(Geom_BezierCurve)& C1, const Handle(Geom_BezierCurve)& C2, const GeomFill_FillingStyle Type);
0083
0084   //! Returns the Bezier surface resulting from the
0085   //! computation performed by this algorithm.
0086     const Handle(Geom_BezierSurface)& Surface() const;
0087
0088
0089
0090
0091 protected:
0092
0093
0094
0095
0096
0097 private:
0098
0099
0100
0101   Handle(Geom_BezierSurface) mySurface;
0102
0103
0104 };
0105
0106
0107 #include <GeomFill_BezierCurves.lxx>
0108
0109
0110
0111
0112
0113 #endif // _GeomFill_BezierCurves_HeaderFile