OCCT

// Created on: 1992-11-18
// 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 _BRepClass_FacePassiveClassifier_HeaderFile
#define _BRepClass_FacePassiveClassifier_HeaderFile

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

#include <gp_Lin2d.hxx>
#include <TopTrans_CurveTransition.hxx>
#include <BRepClass_Intersector.hxx>
#include <Standard_Integer.hxx>
#include <TopAbs_State.hxx>
#include <TopAbs_Orientation.hxx>
class Standard_DomainError;
class BRepClass_Edge;
class BRepClass_Intersector;
class gp_Lin2d;

class BRepClass_FacePassiveClassifier
{
public:
  DEFINE_STANDARD_ALLOC

  //! Creates an undefined classifier.
  Standard_EXPORT BRepClass_FacePassiveClassifier();

  //! Starts a classification process. The point to
  //! classify is the origin of the line <L>. <P> is
  //! the original length of the segment on <L> used to
  //! compute intersections. <Tol> is the tolerance
  //! attached to the line segment in intersections.
  Standard_EXPORT void Reset(const gp_Lin2d& L, const double P, const double Tol);

  //! Updates the classification process with the edge
  //! <E> from the boundary.
  Standard_EXPORT void Compare(const BRepClass_Edge& E, const TopAbs_Orientation Or);

  //! Returns the current value of the parameter.
  double Parameter() const { return myParam; }

  //! Returns the intersecting algorithm.
  BRepClass_Intersector& Intersector() { return myIntersector; }

  //! Returns 0 if the last compared edge had no
  //! relevant intersection. Else returns the index of
  //! this intersection in the last intersection
  //! algorithm.
  int ClosestIntersection() const { return myClosest; }

  //! Returns the current state of the point.
  TopAbs_State State() const { return myState; }

  //! Returns the true if the closest intersection point
  //! represents head or end of the edge. Returns false
  //! otherwise.
  bool IsHeadOrEnd() const { return myIsHeadOrEnd; }

private:
  bool                     myIsSet;
  bool                     myFirstCompare;
  bool                     myFirstTrans;
  gp_Lin2d                 myLin;
  double                   myParam;
  double                   myTolerance;
  TopTrans_CurveTransition myTrans;
  BRepClass_Intersector    myIntersector;
  int                      myClosest;
  TopAbs_State             myState;
  bool                     myIsHeadOrEnd;
};

#endif // _BRepClass_FacePassiveClassifier_HeaderFile