// Created on: 1993-07-29
// Created by: Remi LEQUETTE
// 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 _BRepLib_MakePolygon_HeaderFile
#define _BRepLib_MakePolygon_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>

#include <TopoDS_Vertex.hxx>
#include <TopoDS_Edge.hxx>
#include <BRepLib_MakeShape.hxx>
class gp_Pnt;
class TopoDS_Wire;


//! Class to build polygonal wires.
//!
//! A polygonal wire may be build from
//!
//! - 2,4,3 points.
//!
//! - 2,3,4 vertices.
//!
//! - any number of points.
//!
//! - any number of vertices.
//!
//! When a point or vertex is added to the  polygon if
//! it is identic  to the previous  point no  edge  is
//! built. The method added can be used to test it.
class BRepLib_MakePolygon  : public BRepLib_MakeShape
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! Creates an empty MakePolygon.
  Standard_EXPORT BRepLib_MakePolygon();
  
  Standard_EXPORT BRepLib_MakePolygon(const gp_Pnt& P1, const gp_Pnt& P2);
  
  Standard_EXPORT BRepLib_MakePolygon(const gp_Pnt& P1, const gp_Pnt& P2, const gp_Pnt& P3, const Standard_Boolean Close = Standard_False);
  
  Standard_EXPORT BRepLib_MakePolygon(const gp_Pnt& P1, const gp_Pnt& P2, const gp_Pnt& P3, const gp_Pnt& P4, const Standard_Boolean Close = Standard_False);
  
  Standard_EXPORT BRepLib_MakePolygon(const TopoDS_Vertex& V1, const TopoDS_Vertex& V2);
  
  Standard_EXPORT BRepLib_MakePolygon(const TopoDS_Vertex& V1, const TopoDS_Vertex& V2, const TopoDS_Vertex& V3, const Standard_Boolean Close = Standard_False);
  
  Standard_EXPORT BRepLib_MakePolygon(const TopoDS_Vertex& V1, const TopoDS_Vertex& V2, const TopoDS_Vertex& V3, const TopoDS_Vertex& V4, const Standard_Boolean Close = Standard_False);
  
  Standard_EXPORT void Add (const gp_Pnt& P);
  
  Standard_EXPORT void Add (const TopoDS_Vertex& V);
  
  //! Returns  True if  the last   vertex  or point  was
  //! successfully added.
  Standard_EXPORT Standard_Boolean Added() const;
  
  Standard_EXPORT void Close();
  
  Standard_EXPORT const TopoDS_Vertex& FirstVertex() const;
  
  Standard_EXPORT const TopoDS_Vertex& LastVertex() const;
  
  //! Returns the last edge added to the polygon.
  Standard_EXPORT const TopoDS_Edge& Edge() const;
Standard_EXPORT operator TopoDS_Edge() const;
  
  Standard_EXPORT const TopoDS_Wire& Wire();
  Standard_EXPORT operator TopoDS_Wire();




protected:





private:



  TopoDS_Vertex myFirstVertex;
  TopoDS_Vertex myLastVertex;
  TopoDS_Edge myEdge;


};







#endif // _BRepLib_MakePolygon_HeaderFile
