text: // Created on: 1992-02-18
  // Created by: Christophe MARION
  // 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 _HLRAlgo_EdgeStatus_HeaderFile
  #define _HLRAlgo_EdgeStatus_HeaderFile
  
  #include <Standard.hxx>
  #include <Standard_DefineAlloc.hxx>
  #include <Standard_Handle.hxx>
  
  #include <Standard_Real.hxx>
  #include <Standard_ShortReal.hxx>
  #include <Standard_Boolean.hxx>
  #include <Intrv_Intervals.hxx>
  #include <Standard_Integer.hxx>
  class Standard_OutOfRange;
  
  
  //! This class describes the Hidden  Line status of an
  //! Edge. It contains :
  //!
  //! The Bounds of the Edge and their tolerances
  //!
  //! Two flags indicating if the edge is full visible
  //! or full hidden.
  //!
  //! The Sequence  of visible Intervals  on the Edge.
  class HLRAlgo_EdgeStatus 
  {
  public:
  
    DEFINE_STANDARD_ALLOC
  
    
    Standard_EXPORT HLRAlgo_EdgeStatus();
    
    //! Creates a  new  EdgeStatus.  Default visible.  The
    //! Edge is   bounded by the  interval  <Start>, <End>
    //! with the tolerances <TolStart>, <TolEnd>.
    Standard_EXPORT HLRAlgo_EdgeStatus(const Standard_Real Start, const Standard_ShortReal TolStart, const Standard_Real End, const Standard_ShortReal TolEnd);
    
    //! Initialize  an  EdgeStatus.  Default visible.  The
    //! Edge is   bounded by the  interval  <Start>, <End>
    //! with the tolerances <TolStart>, <TolEnd>.
    Standard_EXPORT void Initialize (const Standard_Real Start, const Standard_ShortReal TolStart, const Standard_Real End, const Standard_ShortReal TolEnd);
  
    void Bounds (Standard_Real& theStart, Standard_ShortReal& theTolStart, Standard_Real& theEnd, Standard_ShortReal& theTolEnd) const
    {
      theStart    = myStart;
      theTolStart = myTolStart;
      theEnd      = myEnd;
      theTolEnd   = myTolEnd;
    }
  
    Standard_EXPORT Standard_Integer NbVisiblePart() const;
    
    Standard_EXPORT void VisiblePart (const Standard_Integer Index, Standard_Real& Start, Standard_ShortReal& TolStart, Standard_Real& End, Standard_ShortReal& TolEnd) const;
    
    //! Hides  the  interval  <Start>,    <End>   with the
    //! tolerances <TolStart>,  <TolEnd>. This interval is
    //! subtracted from the visible  parts.  If the hidden
    //! part is on ( or under ) the face the flag <OnFace>
    //! is True ( or False ).  If the hidden  part is on (
    //! or  inside  ) the boundary  of  the  face the flag
    //! <OnBoundary> is True ( or False ).
    Standard_EXPORT void Hide (const Standard_Real Start, const Standard_ShortReal TolStart, const Standard_Real End, const Standard_ShortReal TolEnd, const Standard_Boolean OnFace, const Standard_Boolean OnBoundary);
  
    //! Hide the whole Edge.
    void HideAll()
    {
      AllVisible(Standard_False);
      AllHidden (Standard_True);
    }
  
    //! Show the whole Edge.
    void ShowAll()
    {
      AllVisible(Standard_True);
      AllHidden (Standard_False);
    }
  
    Standard_Boolean AllHidden() const { return myAllHidden; }
  
    void AllHidden (const Standard_Boolean B) { myAllHidden = B; }
  
    Standard_Boolean AllVisible() const { return myAllVisible; }
  
    void AllVisible (const Standard_Boolean B) { myAllVisible = B; }
  
  private:
  
    Standard_Real myStart;
    Standard_Real myEnd;
    Standard_ShortReal myTolStart;
    Standard_ShortReal myTolEnd;
    Standard_Boolean myAllHidden;
    Standard_Boolean myAllVisible;
    Intrv_Intervals myVisibles;
  
  };
  
  #endif // _HLRAlgo_EdgeStatus_HeaderFile
  