// Created on: 1997-04-17
// Created by: Christophe MARION
// Copyright (c) 1997-1999 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 _HLRBRep_EdgeInterferenceTool_HeaderFile
#define _HLRBRep_EdgeInterferenceTool_HeaderFile

#include "Standard.hxx"
#include "Standard_DefineAlloc.hxx"
#include "Standard_Handle.hxx"

#include "HLRAlgo_Intersection.hxx"
#include "Standard_Integer.hxx"
#include "TopAbs_Orientation.hxx"
class HLRBRep_Data;
class gp_Dir;
class HLRAlgo_Interference;

//! Implements the methods required to instantiates
//! the EdgeInterferenceList from HLRAlgo.
class HLRBRep_EdgeInterferenceTool
{
public:
  DEFINE_STANDARD_ALLOC

  Standard_EXPORT HLRBRep_EdgeInterferenceTool(const occ::handle<HLRBRep_Data>& DS);

  Standard_EXPORT void LoadEdge();

  void InitVertices();

  bool MoreVertices() const;

  void NextVertex();

  const HLRAlgo_Intersection& CurrentVertex() const;

  TopAbs_Orientation CurrentOrientation() const;

  double CurrentParameter() const;

  bool IsPeriodic() const;

  //! Returns local geometric description of the Edge at
  //! parameter <Para>. See method Reset of class
  //! EdgeFaceTransition from TopCnx for other arguments.
  Standard_EXPORT void EdgeGeometry(const double Param,
                                    gp_Dir&      Tgt,
                                    gp_Dir&      Nrm,
                                    double&      Curv) const;

  double ParameterOfInterference(const HLRAlgo_Interference& I) const;

  //! True if the two interferences are on the same
  //! geometric locus.
  Standard_EXPORT bool SameInterferences(const HLRAlgo_Interference& I1,
                                         const HLRAlgo_Interference& I2) const;

  //! True if the Interference and the current Vertex
  //! are on the same geometric locus.
  Standard_EXPORT bool SameVertexAndInterference(const HLRAlgo_Interference& I) const;

  //! Returns the geometry of the boundary at the
  //! interference <I>. See the AddInterference method
  //! of the class EdgeFaceTransition from TopCnx for
  //! the other arguments.
  Standard_EXPORT void InterferenceBoundaryGeometry(const HLRAlgo_Interference& I,
                                                    gp_Dir&                     Tang,
                                                    gp_Dir&                     Norm,
                                                    double&                     Curv) const;

private:
  occ::handle<HLRBRep_Data> myDS;
  HLRAlgo_Intersection      inter[2];
  int                       cur;
};

#include "HLRBRep_EdgeInterferenceTool.lxx"

#endif // _HLRBRep_EdgeInterferenceTool_HeaderFile