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 // Created on: 1993-10-06
 // Created by: Bruno DUMORTIER
 // Copyright (c) 1993-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _GeomFill_BezierCurves_HeaderFile
 #define _GeomFill_BezierCurves_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <GeomFill_FillingStyle.hxx>
 class Geom_BezierSurface;
 class Geom_BezierCurve;
 
 //! This class provides an algorithm for constructing a Bezier surface filled from
 //! contiguous Bezier curves which form its boundaries.
 //! The algorithm accepts two, three or four Bezier curves
 //! as the boundaries of the target surface.
 //! A range of filling styles - more or less rounded, more or less flat - is available.
 //! A BezierCurves object provides a framework for:
 //! -   defining the boundaries, and the filling style of the surface
 //! -   implementing the construction algorithm
 //! -   consulting the result.
 //! Warning
 //! Some problems may show up with rational curves.
 class GeomFill_BezierCurves
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! Constructs an empty framework for building a Bezier
   //! surface from contiguous Bezier curves.
   //! You use the Init function to define the boundaries of the surface.
   Standard_EXPORT GeomFill_BezierCurves();
 
   //! Constructs a framework for building a Bezier surface
   //! from the four contiguous Bezier curves, C1, C2, C3 and C4
   //! Raises Standard_ConstructionError if the curves are not contiguous.
   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);
 
   //! Constructs a framework for building a Bezier surface
   //! from the three contiguous Bezier curves, C1, C2 and C3
   //! Raises Standard_ConstructionError if the curves are not contiguous.
   Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1,
                                         const Handle(Geom_BezierCurve)& C2,
                                         const Handle(Geom_BezierCurve)& C3,
                                         const GeomFill_FillingStyle     Type);
 
   //! Constructs a framework for building a Bezier surface
   //! from the two contiguous Bezier curves, C1 and C2
   //! Raises Standard_ConstructionError if the curves are not contiguous.
   Standard_EXPORT GeomFill_BezierCurves(const Handle(Geom_BezierCurve)& C1,
                                         const Handle(Geom_BezierCurve)& C2,
                                         const GeomFill_FillingStyle     Type);
 
   //! if the curves cannot be joined
   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);
 
   //! if the curves cannot be joined
   Standard_EXPORT void Init(const Handle(Geom_BezierCurve)& C1,
                             const Handle(Geom_BezierCurve)& C2,
                             const Handle(Geom_BezierCurve)& C3,
                             const GeomFill_FillingStyle     Type);
 
   //! Initializes or reinitializes this algorithm with two, three,
   //! or four curves - C1, C2, C3, and C4 - and Type, one
   //! of the following filling styles:
   //! -   GeomFill_Stretch - the style with the flattest patch
   //! -   GeomFill_Coons - a rounded style of patch with
   //! less depth than that of Curved
   //! -   GeomFill_Curved - the style with the most rounded patch.
   //! Exceptions
   //! Standard_ConstructionError if the curves are not contiguous.
   Standard_EXPORT void Init(const Handle(Geom_BezierCurve)& C1,
                             const Handle(Geom_BezierCurve)& C2,
                             const GeomFill_FillingStyle     Type);
 
   //! Returns the Bezier surface resulting from the
   //! computation performed by this algorithm.
   const Handle(Geom_BezierSurface)& Surface() const;
 
 protected:
 private:
   Handle(Geom_BezierSurface) mySurface;
 };
 
 #include <GeomFill_BezierCurves.lxx>
 
 #endif // _GeomFill_BezierCurves_HeaderFile

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