// Created on: 1992-08-11
// Created by: Remi LEQUETTE
// Copyright (c) 1992-1999 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 _TopCnx_EdgeFaceTransition_HeaderFile
#define _TopCnx_EdgeFaceTransition_HeaderFile

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

#include <TopTrans_CurveTransition.hxx>
#include <TopAbs_Orientation.hxx>
class gp_Dir;

//! TheEdgeFaceTransition is an algorithm to compute
//! the cumulated transition for interferences on an
//! edge.
class TopCnx_EdgeFaceTransition
{
public:
  DEFINE_STANDARD_ALLOC

  //! Creates an empty algorithm.
  Standard_EXPORT TopCnx_EdgeFaceTransition();

  //! Initialize the algorithm with the local
  //! description of the edge.
  Standard_EXPORT void Reset(const gp_Dir& Tgt, const gp_Dir& Norm, const double Curv);

  //! Initialize the algorithm with a linear Edge.
  Standard_EXPORT void Reset(const gp_Dir& Tgt);

  //! Add a curve element to the boundary. Or is the
  //! orientation of the interference on the boundary
  //! curve. Tr is the transition of the interference.
  //! BTr is the boundary transition of the
  //! interference.
  Standard_EXPORT void AddInterference(const double             Tole,
                                       const gp_Dir&            Tang,
                                       const gp_Dir&            Norm,
                                       const double             Curv,
                                       const TopAbs_Orientation Or,
                                       const TopAbs_Orientation Tr,
                                       const TopAbs_Orientation BTr);

  //! Returns the current cumulated transition.
  Standard_EXPORT TopAbs_Orientation Transition() const;

  //! Returns the current cumulated BoundaryTransition.
  Standard_EXPORT TopAbs_Orientation BoundaryTransition() const;

private:
  TopTrans_CurveTransition myCurveTransition;
  int                      nbBoundForward;
  int                      nbBoundReversed;
};

#endif // _TopCnx_EdgeFaceTransition_HeaderFile
