// Created on: 1995-11-10
// Created by: Yves FRICAUD
// Copyright (c) 1995-1999 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 _BRepAlgo_Loop_HeaderFile
#define _BRepAlgo_Loop_HeaderFile

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

#include <TopoDS_Face.hxx>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_DataMapOfShapeListOfShape.hxx>
#include <TopTools_DataMapOfShapeShape.hxx>
#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
#include <BRepAlgo_Image.hxx>
class TopoDS_Edge;


//! Builds the loops from a set of edges on a face.
class BRepAlgo_Loop 
{
public:

  DEFINE_STANDARD_ALLOC

  
  Standard_EXPORT BRepAlgo_Loop();
  
  //! Init with <F> the set of edges must have
  //! pcurves on <F>.
  Standard_EXPORT void Init (const TopoDS_Face& F);
  
  //! Add E with <LV>. <E> will be copied and trim
  //! by vertices in <LV>.
  Standard_EXPORT void AddEdge (TopoDS_Edge& E, const TopTools_ListOfShape& LV);
  
  //! Add <E> as const edge, E can be in the result.
  Standard_EXPORT void AddConstEdge (const TopoDS_Edge& E);
  
  //! Add <LE> as a set of const edges.
  Standard_EXPORT void AddConstEdges (const TopTools_ListOfShape& LE);
  
  //! Sets the Image Vertex - Vertex
  Standard_EXPORT void SetImageVV (const BRepAlgo_Image& theImageVV);
  
  //! Make loops.
  Standard_EXPORT void Perform();
  
  //! Update VE map according to Image Vertex - Vertex
  Standard_EXPORT void UpdateVEmap (TopTools_IndexedDataMapOfShapeListOfShape& theVEmap);
  
  //! Cut the  edge <E>  in  several edges  <NE> on the
  //! vertices<VonE>.
  Standard_EXPORT void CutEdge (const TopoDS_Edge& E, const TopTools_ListOfShape& VonE, TopTools_ListOfShape& NE) const;
  
  //! Returns the list of wires performed.
  //! can be an empty list.
  Standard_EXPORT const TopTools_ListOfShape& NewWires() const;
  
  //! Build faces from the wires result.
  Standard_EXPORT void WiresToFaces();
  
  //! Returns the list of faces.
  //! Warning: The method <WiresToFaces> as to be called before.
  //! can be an empty list.
  Standard_EXPORT const TopTools_ListOfShape& NewFaces() const;
  
  //! Returns the list of new edges built from an edge <E>
  //! it can be an empty list.
  Standard_EXPORT const TopTools_ListOfShape& NewEdges (const TopoDS_Edge& E) const;
  
  //! Returns the datamap of vertices with their substitutes.
  Standard_EXPORT void GetVerticesForSubstitute (TopTools_DataMapOfShapeShape& VerVerMap) const;
  
  Standard_EXPORT void VerticesForSubstitute (TopTools_DataMapOfShapeShape& VerVerMap);




protected:





private:



  TopoDS_Face myFace;
  TopTools_ListOfShape myConstEdges;
  TopTools_ListOfShape myEdges;
  TopTools_DataMapOfShapeListOfShape myVerOnEdges;
  TopTools_ListOfShape myNewWires;
  TopTools_ListOfShape myNewFaces;
  TopTools_DataMapOfShapeListOfShape myCutEdges;
  TopTools_DataMapOfShapeShape myVerticesForSubstitute;
  BRepAlgo_Image myImageVV;


};







#endif // _BRepAlgo_Loop_HeaderFile