// Created on: 1993-05-07
// Created by: Jean Yves LEBEY
// 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 _TopOpeBRep_ShapeIntersector2d_HeaderFile
#define _TopOpeBRep_ShapeIntersector2d_HeaderFile

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

#include <TopoDS_Shape.hxx>
#include <TopOpeBRepTool_ShapeExplorer.hxx>
#include <TopOpeBRep_ShapeScanner.hxx>
#include <TopOpeBRep_EdgesIntersector.hxx>
#include <Standard_Boolean.hxx>
#include <Standard_Integer.hxx>
class TopOpeBRepTool_HBoxTool;
class TopoDS_Shape;
class TopOpeBRep_EdgesIntersector;


//! Intersect two shapes.
//!
//! A GeomShape is a  shape with a geometric domain, i.e.
//! a Face or an Edge.
//!
//! The purpose   of  the  ShapeIntersector2d is   to  find
//! couples  of  intersecting   GeomShape  in  two Shapes
//! (which can   be  any kind of  topologies  : Compound,
//! Solid, Shell, etc... )
//!
//! It  is in charge  of  exploration  of the shapes  and
//! rejection. For this it is provided with two tools :
//!
//! - ShapeExplorer from TopOpeBRepTool.
//! - ShapeScanner from TopOpeBRep which implements bounding boxes.
//!
//! Let S1,S2 the shapes sent to InitIntersection(S1,S2) method :
//! - S1 is always SCANNED by a ShapeScanner from TopOpeBRep.
//! - S2 is always EXPLORED by a ShapeExplorer from TopOpeBRepTool.
class TopOpeBRep_ShapeIntersector2d 
{
public:

  DEFINE_STANDARD_ALLOC

  
  Standard_EXPORT TopOpeBRep_ShapeIntersector2d();
  
  //! Initialize the intersection of shapes S1,S2.
  Standard_EXPORT void InitIntersection (const TopoDS_Shape& S1, const TopoDS_Shape& S2);
  
  //! return  the shape  <Index> ( = 1 or 2) given to
  //! InitIntersection().
  //! Index = 1 will return S1, Index = 2 will return S2.
  Standard_EXPORT const TopoDS_Shape& Shape (const Standard_Integer Index) const;
  
  //! returns True if there are more intersection
  //! between two the shapes.
  Standard_EXPORT Standard_Boolean MoreIntersection() const;
  
  //! search for the next intersection between the two shapes.
  Standard_EXPORT void NextIntersection();
  
  //! return the current intersection of two Edges.
  Standard_EXPORT TopOpeBRep_EdgesIntersector& ChangeEdgesIntersector();
  
  //! return  geometric  shape <Index> ( = 1 or 2 )  of
  //! current intersection.
  Standard_EXPORT const TopoDS_Shape& CurrentGeomShape (const Standard_Integer Index) const;
  
  Standard_EXPORT void DumpCurrent (const Standard_Integer K) const;
  
  Standard_EXPORT Standard_Integer Index (const Standard_Integer K) const;




protected:





private:

  
  Standard_EXPORT void Reset();
  
  Standard_EXPORT void Init (const TopoDS_Shape& S1, const TopoDS_Shape& S2);
  
  Standard_EXPORT void SetIntersectionDone();
  
  Standard_EXPORT void InitFFIntersection();
  
  Standard_EXPORT void FindFFIntersection();
  
  Standard_EXPORT Standard_Boolean MoreFFCouple() const;
  
  Standard_EXPORT void NextFFCouple();
  
  Standard_EXPORT void InitEEFFIntersection();
  
  Standard_EXPORT void FindEEFFIntersection();
  
  Standard_EXPORT Standard_Boolean MoreEEFFCouple() const;
  
  Standard_EXPORT void NextEEFFCouple();


  TopoDS_Shape myShape1;
  TopoDS_Shape myShape2;
  Handle(TopOpeBRepTool_HBoxTool) myHBoxTool;
  TopOpeBRepTool_ShapeExplorer myFaceExplorer;
  TopOpeBRep_ShapeScanner myFaceScanner;
  TopOpeBRepTool_ShapeExplorer myEdgeExplorer;
  TopOpeBRep_ShapeScanner myEdgeScanner;
  TopOpeBRep_EdgesIntersector myEEIntersector;
  Standard_Boolean myIntersectionDone;
  Standard_Boolean myFFDone;
  Standard_Boolean myEEFFDone;
  Standard_Boolean myFFInit;
  Standard_Boolean myEEFFInit;


};







#endif // _TopOpeBRep_ShapeIntersector2d_HeaderFile