// Created on: 1996-08-30
// Created by: Yves FRICAUD
// Copyright (c) 1996-1999 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 _BRepOffset_Inter2d_HeaderFile
#define _BRepOffset_Inter2d_HeaderFile

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

#include <TopTools_IndexedMapOfShape.hxx>
#include <Standard_Real.hxx>
#include <TopTools_DataMapOfShapeShape.hxx>
#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
class BRepAlgo_AsDes;
class TopoDS_Face;
class BRepOffset_Offset;


//! Computes the intersections betwwen edges on a face
//! stores result is SD as AsDes from BRepOffset.
class BRepOffset_Inter2d 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! Computes the intersections between the edges stored
  //! is AsDes as descendants of <F> . Intersections is computed
  //! between two edges if one of them is bound in NewEdges.
  //! When all faces of the shape are treated the intersection
  //! vertices have to be fused using the FuseVertices method.
  //! theDMVV contains the vertices that should be fused
  Standard_EXPORT static void Compute (const Handle(BRepAlgo_AsDes)& AsDes, 
                                       const TopoDS_Face& F, 
                                       const TopTools_IndexedMapOfShape& NewEdges, 
                                       const Standard_Real Tol,
                                       TopTools_IndexedDataMapOfShapeListOfShape& theDMVV);

  //! Computes the intersection between the offset edges of the <FI>.
  //! All intersection vertices will be stored in AsDes2d.
  //! When all faces of the shape are treated the intersection vertices
  //! have to be fused using the FuseVertices method.
  //! theDMVV contains the vertices that should be fused.
  Standard_EXPORT static void ConnexIntByInt (const TopoDS_Face& FI,
                                              BRepOffset_Offset& OFI,
                                              TopTools_DataMapOfShapeShape& MES,
                                              const TopTools_DataMapOfShapeShape& Build,
                                              const Handle(BRepAlgo_AsDes)& AsDes2d,
                                              const Standard_Real Offset,
                                              const Standard_Real Tol,
                                              TopTools_IndexedMapOfShape& FacesWithVerts,
                                              TopTools_IndexedDataMapOfShapeListOfShape& theDMVV);

  //! Computes the intersection between the offset edges generated
  //! from vertices and stored into AsDes as descendants of the <FI>.
  //! All intersection vertices will be stored in AsDes2d.
  //! When all faces of the shape are treated the intersection vertices
  //! have to be fused using the FuseVertices method.
  //! theDMVV contains the vertices that should be fused.
  Standard_EXPORT static void ConnexIntByIntInVert (const TopoDS_Face& FI,
                                                    BRepOffset_Offset& OFI,
                                                    TopTools_DataMapOfShapeShape& MES,
                                                    const TopTools_DataMapOfShapeShape& Build,
                                                    const Handle(BRepAlgo_AsDes)& AsDes,
                                                    const Handle(BRepAlgo_AsDes)& AsDes2d,
                                                    const Standard_Real Tol,
                                                    TopTools_IndexedDataMapOfShapeListOfShape& theDMVV);

  //! Fuses the chains of vertices in the theDMVV
  //! and updates AsDes by replacing the old vertices
  //! with the new ones.
  Standard_EXPORT static void FuseVertices(const TopTools_IndexedDataMapOfShapeListOfShape& theDMVV,
                                           const Handle(BRepAlgo_AsDes)& theAsDes);
  //! extents the edge
  Standard_EXPORT static void ExtentEdge(const TopoDS_Edge& E,
                                         TopoDS_Edge& NE,
                                         const Standard_Real theOffset);

protected:

private:

};

#endif // _BRepOffset_Inter2d_HeaderFile