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 // Created on: 1994-02-16
 // Created by: Remi LEQUETTE
 // Copyright (c) 1994-1999 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 _BRepBuilderAPI_MakeShell_HeaderFile
 #define _BRepBuilderAPI_MakeShell_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <BRepLib_MakeShell.hxx>
 #include <BRepBuilderAPI_MakeShape.hxx>
 #include <Standard_Real.hxx>
 #include <BRepBuilderAPI_ShellError.hxx>
 class Geom_Surface;
 class TopoDS_Shell;
 
 //! Describes functions to build a
 //! shape corresponding to the skin of a surface.
 //! Note that the term shell in the class name has the same definition
 //! as that of a shell in STEP, in other words the skin of a shape,
 //! and not a solid model defined by surface and thickness. If you want
 //! to build the second sort of shell, you must use
 //! BRepOffsetAPI_MakeOffsetShape. A shell is made of a series of
 //! faces connected by their common edges.
 //! If the underlying surface of a face is not C2 continuous and
 //! the flag Segment is True, MakeShell breaks the surface down into
 //! several faces which are all C2 continuous and which are
 //! connected along the non-regular curves on the surface.
 //! The resulting shell contains all these faces.
 //! Construction of a Shell from a non-C2 continuous Surface
 //! A MakeShell object provides a framework for:
 //! -      defining the construction of a shell,
 //! -      implementing the construction algorithm, and
 //! -      consulting the result.
 //! Warning
 //! The connected C2 faces in the shell resulting from a decomposition of
 //! the surface are not sewn. For a sewn result, you need to use
 //! BRepOffsetAPI_Sewing. For a shell with thickness, you need to use
 //! BRepOffsetAPI_MakeOffsetShape.
 class BRepBuilderAPI_MakeShell : public BRepBuilderAPI_MakeShape
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! Constructs an empty shell framework. The Init
   //! function is used to define the construction arguments.
   //! Warning
   //! The function Error will return
   //! BRepBuilderAPI_EmptyShell if it is called before the function Init.
   Standard_EXPORT BRepBuilderAPI_MakeShell();
 
   //! Constructs a shell from the surface S.
   Standard_EXPORT BRepBuilderAPI_MakeShell(const Handle(Geom_Surface)& S,
                                            const Standard_Boolean      Segment = Standard_False);
 
   //! Constructs a shell from the surface S,
   //! limited in the u parametric direction by the two
   //! parameter values UMin and UMax, and limited in the v
   //! parametric direction by the two parameter values VMin and VMax.
   Standard_EXPORT BRepBuilderAPI_MakeShell(const Handle(Geom_Surface)& S,
                                            const Standard_Real         UMin,
                                            const Standard_Real         UMax,
                                            const Standard_Real         VMin,
                                            const Standard_Real         VMax,
                                            const Standard_Boolean      Segment = Standard_False);
 
   //! Defines or redefines the arguments
   //! for the construction of a shell. The construction is initialized
   //! with the surface S, limited in the u parametric direction by the
   //! two parameter values UMin and UMax, and in the v parametric
   //! direction by the two parameter values VMin and VMax.
   //! Warning
   //! The function Error returns:
   //! -      BRepBuilderAPI_ShellParametersOutOfRange
   //! when the given parameters are outside the bounds of the
   //! surface or the basis surface if S is trimmed
   Standard_EXPORT void Init(const Handle(Geom_Surface)& S,
                             const Standard_Real         UMin,
                             const Standard_Real         UMax,
                             const Standard_Real         VMin,
                             const Standard_Real         VMax,
                             const Standard_Boolean      Segment = Standard_False);
 
   //! Returns true if the shell is built.
   Standard_EXPORT virtual Standard_Boolean IsDone() const Standard_OVERRIDE;
 
   //! Returns the construction status:
   //! -   BRepBuilderAPI_ShellDone if the shell is built, or
   //! -   another value of the BRepBuilderAPI_ShellError
   //! enumeration indicating why the construction failed.
   //! This is frequently BRepBuilderAPI_ShellParametersOutOfRange
   //! indicating that the given parameters are outside the bounds of the surface.
   Standard_EXPORT BRepBuilderAPI_ShellError Error() const;
 
   //! Returns the new Shell.
   Standard_EXPORT const TopoDS_Shell& Shell() const;
   Standard_EXPORT                     operator TopoDS_Shell() const;
 
 protected:
 private:
   BRepLib_MakeShell myMakeShell;
 };
 
 #endif // _BRepBuilderAPI_MakeShell_HeaderFile

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