// Created on: 1998-08-26
// Created by: Julia GERASIMOVA
// Copyright (c) 1998-1999 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.

#include <BRepFill_Filling.hxx>

#include <Adaptor3d_CurveOnSurface.hxx>
#include <BRep_Builder.hxx>
#include <BRep_TEdge.hxx>
#include <BRep_Tool.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRepAdaptor_Curve2d.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepFill_CurveConstraint.hxx>
#include <BRepFill_EdgeFaceAndOrder.hxx>
#include <BRepFill_FaceAndOrder.hxx>
#include <BRepLib.hxx>
#include <BRepLib_MakeVertex.hxx>
#include <BRepLib_MakeEdge.hxx>
#include <BRepLib_MakeFace.hxx>
#include <BRepLib_MakeWire.hxx>
#include <BRepTools.hxx>
#include <BRepTools_WireExplorer.hxx>
#include <Geom2d_BezierCurve.hxx>
#include <Geom2d_TrimmedCurve.hxx>
#include <Geom2dAdaptor_Curve.hxx>
#include <Geom_BSplineSurface.hxx>
#include <GeomAdaptor_Surface.hxx>
#include <GeomAPI_ProjectPointOnSurf.hxx>
#include <GeomPlate_CurveConstraint.hxx>
#include <GeomPlate_MakeApprox.hxx>
#include <GeomPlate_PlateG0Criterion.hxx>
#include <GeomPlate_PointConstraint.hxx>
#include <gp_Pnt.hxx>
#include <Precision.hxx>
#include <StdFail_NotDone.hxx>
#include <Geom2d_Curve.hxx>
#include <NCollection_Array1.hxx>
#include <NCollection_HArray1.hxx>
#include <gp_Pnt2d.hxx>
#include <NCollection_Sequence.hxx>
#include <gp_XY.hxx>
#include <TopExp.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Wire.hxx>
#include <Geom_Surface.hxx>

static gp_Vec MakeFinVec(const TopoDS_Wire& aWire, const TopoDS_Vertex& aVertex)
{
  TopoDS_Vertex          Vfirst, Vlast, Origin;
  BRepTools_WireExplorer Explo(aWire);
  for (; Explo.More(); Explo.Next())
  {
    TopExp::Vertices(Explo.Current(), Vfirst, Vlast);
    if (Vfirst.IsSame(aVertex))
    {
      Origin = Vlast;
      break;
    }
    if (Vlast.IsSame(aVertex))
    {
      Origin = Vfirst;
      break;
    }
  }
  return gp_Vec(BRep_Tool::Pnt(Origin), BRep_Tool::Pnt(aVertex));
}

static TopoDS_Wire WireFromList(NCollection_List<TopoDS_Shape>& Edges)
{
  BRep_Builder BB;
  TopoDS_Wire  aWire;
  BB.MakeWire(aWire);
  TopoDS_Edge anEdge = TopoDS::Edge(Edges.First());
  BB.Add(aWire, anEdge);
  Edges.RemoveFirst();

  TopoDS_Vertex V1, V2;
  TopExp::Vertices(anEdge, V1, V2, true); // with orientation

  while (!Edges.IsEmpty())
  {
    NCollection_List<TopoDS_Shape>::Iterator itl(Edges);
    for (; itl.More(); itl.Next())
    {
      anEdge = TopoDS::Edge(itl.Value());
      TopoDS_Vertex V3, V4;
      TopExp::Vertices(anEdge, V3, V4, true); // with orientation
      if (V1.IsSame(V3) || V1.IsSame(V4) || V2.IsSame(V3) || V2.IsSame(V4))
      {
        if (V1.IsSame(V3))
        {
          anEdge.Reverse();
          V1 = V4;
        }
        else if (V1.IsSame(V4))
        {
          V1 = V3;
        }
        else if (V2.IsSame(V3))
        {
          V2 = V4;
        }
        else
        {
          anEdge.Reverse();
          V2 = V3;
        }
        break;
      }
    }
    if (!itl.More())
    {
      Message::SendWarning() << "Warning: WireFromList: can't find the next edge. The wire is not "
                                "complete, some edges are lost.";
      break;
    }
    BB.Add(aWire, anEdge);
    Edges.Remove(itl);
  }

  aWire.Closed(true);
  return aWire;
}

//=================================================================================================

BRepFill_Filling::BRepFill_Filling(const int    Degree,
                                   const int    NbPtsOnCur,
                                   const int    NbIter,
                                   const bool   Anisotropie,
                                   const double Tol2d,
                                   const double Tol3d,
                                   const double TolAng,
                                   const double TolCurv,
                                   const int    MaxDeg,
                                   const int    MaxSegments)
{
  myDegree      = Degree;
  myNbPtsOnCur  = NbPtsOnCur;
  myNbIter      = NbIter;
  myAnisotropie = Anisotropie;

  myTol2d   = Tol2d;
  myTol3d   = Tol3d;
  myTolAng  = TolAng;
  myTolCurv = TolCurv;

  myMaxDeg      = MaxDeg;
  myMaxSegments = MaxSegments;

  myIsInitFaceGiven = false;

  myIsDone = false;
}

//=================================================================================================

void BRepFill_Filling::SetConstrParam(const double Tol2d,
                                      const double Tol3d,
                                      const double TolAng,
                                      const double TolCurv)
{
  myTol2d   = Tol2d;
  myTol3d   = Tol3d;
  myTolAng  = TolAng;
  myTolCurv = TolCurv;
}

//=================================================================================================

void BRepFill_Filling::SetResolParam(const int  Degree,
                                     const int  NbPtsOnCur,
                                     const int  NbIter,
                                     const bool Anisotropie)
{
  myDegree      = Degree;
  myNbPtsOnCur  = NbPtsOnCur;
  myNbIter      = NbIter;
  myAnisotropie = Anisotropie;
}

//=================================================================================================

void BRepFill_Filling::SetApproxParam(const int MaxDeg, const int MaxSegments)
{
  myMaxDeg      = MaxDeg;
  myMaxSegments = MaxSegments;
}

//=================================================================================================

void BRepFill_Filling::LoadInitSurface(const TopoDS_Face& aFace)
{
  myInitFace        = aFace;
  myIsInitFaceGiven = true;
}

//=================================================================================================

int BRepFill_Filling::Add(const TopoDS_Edge& anEdge, const GeomAbs_Shape Order, const bool IsBound)
{
  TopoDS_Face               NullFace;
  BRepFill_EdgeFaceAndOrder EdgeFaceAndOrder(anEdge, NullFace, Order);
  if (IsBound)
  {
    myBoundary.Append(EdgeFaceAndOrder);
    return myBoundary.Length();
  }
  else
  {
    myConstraints.Append(EdgeFaceAndOrder);
    return (myBoundary.Length() + myFreeConstraints.Length() + myConstraints.Length());
  }
}

//=======================================================================
// function : Add
// purpose  : adds an edge with supporting face as a constraint
//======================================================================
int BRepFill_Filling::Add(const TopoDS_Edge&  anEdge,
                          const TopoDS_Face&  Support,
                          const GeomAbs_Shape Order,
                          const bool          IsBound)
{
  BRepFill_EdgeFaceAndOrder EdgeFaceAndOrder(anEdge, Support, Order);
  if (IsBound)
  {
    myBoundary.Append(EdgeFaceAndOrder);
    return myBoundary.Length();
  }
  else
  {
    myConstraints.Append(EdgeFaceAndOrder);
    return (myBoundary.Length() + myFreeConstraints.Length() + myConstraints.Length());
  }
}

//=======================================================================
// function : Add
// purpose  : adds a "free constraint": face without edge
//======================================================================
int BRepFill_Filling::Add(const TopoDS_Face& Support, const GeomAbs_Shape Order)
{
  BRepFill_FaceAndOrder FaceAndOrder(Support, Order);
  myFreeConstraints.Append(FaceAndOrder);
  return (myBoundary.Length() + myFreeConstraints.Length());
}

//=================================================================================================

int BRepFill_Filling::Add(const gp_Pnt& Point)
{
  occ::handle<GeomPlate_PointConstraint> aPC =
    new GeomPlate_PointConstraint(Point, GeomAbs_C0, myTol3d);
  myPoints.Append(aPC);
  return (myBoundary.Length() + myFreeConstraints.Length() + myConstraints.Length()
          + myPoints.Length());
}

//=======================================================================
// function : Add
// purpose  : adds a point constraint on a face
//======================================================================
int BRepFill_Filling::Add(const double        U,
                          const double        V,
                          const TopoDS_Face&  Support,
                          const GeomAbs_Shape Order)
{
  occ::handle<BRepAdaptor_Surface> HSurf = new BRepAdaptor_Surface();
  HSurf->Initialize(Support);
  occ::handle<GeomPlate_PointConstraint> aPC =
    new GeomPlate_PointConstraint(U,
                                  V,
                                  BRep_Tool::Surface(HSurf->Face()),
                                  Order,
                                  myTol3d,
                                  myTolAng,
                                  myTolCurv);
  myPoints.Append(aPC);
  return (myBoundary.Length() + myFreeConstraints.Length() + myConstraints.Length()
          + myPoints.Length());
}

//=================================================================================================

void BRepFill_Filling::AddConstraints(
  const NCollection_Sequence<BRepFill_EdgeFaceAndOrder>& SeqOfConstraints)
{
  TopoDS_Edge   CurEdge;
  TopoDS_Face   CurFace;
  GeomAbs_Shape CurOrder;

  occ::handle<GeomPlate_CurveConstraint> Constr;
  int                                    i;
  for (i = 1; i <= SeqOfConstraints.Length(); i++)
  {
    CurEdge  = SeqOfConstraints(i).myEdge;
    CurFace  = SeqOfConstraints(i).myFace;
    CurOrder = SeqOfConstraints(i).myOrder;

    if (CurFace.IsNull())
    {
      if (CurOrder == GeomAbs_C0)
      {
        occ::handle<BRepAdaptor_Curve> HCurve = new BRepAdaptor_Curve();
        HCurve->Initialize(CurEdge);
        const occ::handle<Adaptor3d_Curve>& aHCurve = HCurve; // to avoid ambiguity
        Constr = new BRepFill_CurveConstraint(aHCurve, CurOrder, myNbPtsOnCur, myTol3d);
      }
      else
      { // Pas de representation Topologique
        // On prend une representation Geometrique : au pif !
        occ::handle<Geom_Surface> Surface;
        occ::handle<Geom2d_Curve> C2d;
        TopLoc_Location           loc;
        double                    f, l;
        BRep_Tool::CurveOnSurface(CurEdge, C2d, Surface, loc, f, l);
        if (Surface.IsNull())
        {
          throw Standard_Failure("Add");
          return;
        }
        Surface = occ::down_cast<Geom_Surface>(Surface->Copy());
        Surface->Transform(loc.Transformation());
        occ::handle<GeomAdaptor_Surface> Surf    = new GeomAdaptor_Surface(Surface);
        occ::handle<Geom2dAdaptor_Curve> Curve2d = new Geom2dAdaptor_Curve(C2d);

        Adaptor3d_CurveOnSurface              CurvOnSurf(Curve2d, Surf);
        occ::handle<Adaptor3d_CurveOnSurface> HCurvOnSurf =
          new Adaptor3d_CurveOnSurface(CurvOnSurf);

        Constr = new GeomPlate_CurveConstraint(HCurvOnSurf,
                                               CurOrder,
                                               myNbPtsOnCur,
                                               myTol3d,
                                               myTolAng,
                                               myTolCurv);
      }
    }
    else
    {
      occ::handle<BRepAdaptor_Surface> Surf = new BRepAdaptor_Surface();
      Surf->Initialize(CurFace);
      occ::handle<BRepAdaptor_Curve2d> Curve2d = new BRepAdaptor_Curve2d();
      Curve2d->Initialize(CurEdge, CurFace);
      // If CurEdge has no 2d representation on CurFace,
      // there will be exception "Attempt to access to null object"
      // in this initialization (null pcurve).
      Adaptor3d_CurveOnSurface              CurvOnSurf(Curve2d, Surf);
      occ::handle<Adaptor3d_CurveOnSurface> HCurvOnSurf = new Adaptor3d_CurveOnSurface(CurvOnSurf);

      Constr = new BRepFill_CurveConstraint(HCurvOnSurf,
                                            CurOrder,
                                            myNbPtsOnCur,
                                            myTol3d,
                                            myTolAng,
                                            myTolCurv);
    }
    if (myIsInitFaceGiven)
    {
      occ::handle<Geom2d_Curve> Curve2d;
      double                    FirstPar, LastPar;
      Curve2d = BRep_Tool::CurveOnSurface(CurEdge, myInitFace, FirstPar, LastPar);
      if (!Curve2d.IsNull())
      {
        Curve2d = new Geom2d_TrimmedCurve(Curve2d, FirstPar, LastPar);
        Constr->SetCurve2dOnSurf(Curve2d);
      }
    }
    myBuilder->Add(Constr);
  }
}

//=================================================================================================

void BRepFill_Filling::BuildWires(NCollection_List<TopoDS_Shape>& EdgeList,
                                  NCollection_List<TopoDS_Shape>& WireList)
{
  NCollection_List<TopoDS_Shape>::Iterator Itl;
  int                                      i, j;

  while (!EdgeList.IsEmpty())
  {
    BRepLib_MakeWire MW;
    TopoDS_Edge      FirstEdge = TopoDS::Edge(EdgeList.First());
    MW.Add(FirstEdge);
    EdgeList.RemoveFirst();
    TopoDS_Vertex V_wire[2], V_edge[2];

    for (;;)
    {
      TopoDS_Wire CurWire = MW.Wire();
      TopExp::Vertices(CurWire, V_wire[0], V_wire[1]);
      bool found = false;
      for (Itl.Initialize(EdgeList); Itl.More(); Itl.Next())
      {
        TopoDS_Edge CurEdge = TopoDS::Edge(Itl.Value());
        TopExp::Vertices(CurEdge, V_edge[0], V_edge[1]);
        for (i = 0; i < 2; i++)
        {
          for (j = 0; j < 2; j++)
          {
            if (V_wire[i].IsSame(V_edge[j]))
            {
              MW.Add(CurEdge);
              EdgeList.Remove(Itl);
              found = true;
              break;
            }
          }
          if (found)
          {
            break;
          }
        }
        if (found)
        {
          break;
        }
      }
      if (!found) // try to find geometric coincidence
      {
        gp_Pnt P_wire[2];
        P_wire[0] = BRep_Tool::Pnt(V_wire[0]);
        P_wire[1] = BRep_Tool::Pnt(V_wire[1]);
        for (Itl.Initialize(EdgeList); Itl.More(); Itl.Next())
        {
          TopoDS_Edge CurEdge = TopoDS::Edge(Itl.Value());
          TopExp::Vertices(CurEdge, V_edge[0], V_edge[1]);
          for (i = 0; i < 2; i++)
          {
            for (j = 0; j < 2; j++)
            {
              double aDist = P_wire[i].Distance(BRep_Tool::Pnt(V_edge[j]));
              if (aDist < BRep_Tool::Tolerance(V_wire[i])
                  && aDist < BRep_Tool::Tolerance(V_edge[j]))
              {
                MW.Add(CurEdge);
                TopoDS_Edge NewEdge = MW.Edge();
                myOldNewMap.Bind(CurEdge.Oriented(TopAbs_FORWARD),
                                 NewEdge.Oriented(TopAbs_FORWARD));
                EdgeList.Remove(Itl);
                found = true;
                break;
              }
            }
            if (found)
            {
              break;
            }
          }
          if (found)
          {
            break;
          }
        }
      }
      if (!found) // end of current wire, begin next wire
      {
        WireList.Append(MW.Wire());
        break;
      }
    } // end of for (;;)
  } // end of while (! EdgeList.IsEmpty())
}

//=================================================================================================

void BRepFill_Filling::FindExtremitiesOfHoles(const NCollection_List<TopoDS_Shape>& WireList,
                                              NCollection_Sequence<TopoDS_Shape>&   VerSeq) const
{
  NCollection_Sequence<TopoDS_Shape>       WireSeq;
  NCollection_List<TopoDS_Shape>::Iterator Itl(WireList);
  for (; Itl.More(); Itl.Next())
  {
    WireSeq.Append(Itl.Value());
  }

  TopoDS_Wire theWire;
  theWire = TopoDS::Wire(WireSeq(1));
  WireSeq.Remove(1);

  if (BRep_Tool::IsClosed(theWire))
  {
    return;
  }

  TopoDS_Vertex Vfirst, Vlast;
  TopExp::Vertices(theWire, Vfirst, Vlast);

  if (Vfirst.IsSame(Vlast))
  {
    // The Wire is closed indeed despite its
    // being not detected earlier.

    return;
  }

  gp_Vec        FinVec    = MakeFinVec(theWire, Vlast);
  TopoDS_Vertex theVertex = Vlast;
  VerSeq.Append(Vlast);

  while (!WireSeq.IsEmpty())
  {
    TopoDS_Vertex MinVtx;
    int           i, MinInd = 1;
    bool          IsLast   = false;
    double        MinAngle = M_PI;

    for (i = 1; i <= WireSeq.Length(); i++)
    {
      const TopoDS_Wire& CurWire = TopoDS::Wire(WireSeq(i));
      TopExp::Vertices(CurWire, Vfirst, Vlast);

      double angle = FinVec.Angle(gp_Vec(BRep_Tool::Pnt(theVertex), BRep_Tool::Pnt(Vfirst)));
      if (angle < MinAngle)
      {
        MinAngle = angle;
        MinVtx   = Vfirst;
        MinInd   = i;
        IsLast   = true;
      }
      angle = FinVec.Angle(gp_Vec(BRep_Tool::Pnt(theVertex), BRep_Tool::Pnt(Vlast)));
      if (angle < MinAngle)
      {
        MinAngle = angle;
        MinVtx   = Vlast;
        MinInd   = i;
        IsLast   = false;
      }
    }
    VerSeq.Append(MinVtx);
    const TopoDS_Wire& MinWire = TopoDS::Wire(WireSeq(MinInd));
    TopExp::Vertices(MinWire, Vfirst, Vlast);
    if (IsLast)
    {
      FinVec    = MakeFinVec(MinWire, Vlast);
      theVertex = Vlast;
    }
    else
    {
      FinVec    = MakeFinVec(MinWire, Vfirst);
      theVertex = Vfirst;
    }
    VerSeq.Append(theVertex);
    WireSeq.Remove(MinInd);
  }
  TopExp::Vertices(theWire, Vfirst, Vlast);
  VerSeq.Append(Vfirst);
}

//=================================================================================================

void BRepFill_Filling::Build()
{
  myBuilder.reset(new GeomPlate_BuildPlateSurface(myDegree,
                                                  myNbPtsOnCur,
                                                  myNbIter,
                                                  myTol2d,
                                                  myTol3d,
                                                  myTolAng,
                                                  myTolCurv,
                                                  myAnisotropie));

  if (myBoundary.IsEmpty())
  {
    myIsDone = false;
    return;
  }

  TopoDS_Edge CurEdge;
  TopoDS_Face CurFace;
  int         i, j;

  // Creating array of vertices: extremities of wires
  NCollection_Sequence<TopoDS_Shape> VerSeq;

  // Building missing bounds
  NCollection_List<TopoDS_Shape> EdgeList, WireList;
  for (i = 1; i <= myBoundary.Length(); i++)
  {
    EdgeList.Append(myBoundary(i).myEdge);
  }

  BuildWires(EdgeList, WireList);
  FindExtremitiesOfHoles(WireList, VerSeq);

  // Searching for surfaces for missing bounds
  for (j = 1; j <= myFreeConstraints.Length(); j++)
  {
    GeomAPI_ProjectPointOnSurf Projector;
    double                     U1, V1, U2, V2;

    CurFace                                = myFreeConstraints(j).myFace;
    occ::handle<BRepAdaptor_Surface> HSurf = new BRepAdaptor_Surface();
    HSurf->Initialize(CurFace);
    occ::handle<Geom_Surface> CurSurface = BRep_Tool::Surface(HSurf->Face());
    // BRepTopAdaptor_FClass2d Classifier( CurFace, Precision::Confusion() );

    for (i = 1; i <= VerSeq.Length(); i += 2)
    {
      const TopoDS_Vertex& FirstVtx = TopoDS::Vertex(VerSeq(i));
      const TopoDS_Vertex& LastVtx  = TopoDS::Vertex(VerSeq(i + 1));

      gp_Pnt FirstPnt = BRep_Tool::Pnt(FirstVtx);
      Projector.Init(FirstPnt, CurSurface);
      if (Projector.LowerDistance() > Precision::Confusion())
      {
        continue;
      }
      Projector.LowerDistanceParameters(U1, V1);

      /*
      State = Classifier.Perform(gp_Pnt2d( U1, V1 ),
                     ((HSurf->IsUPeriodic() || HSurf->IsVPeriodic())? true :
      false)); if (State == TopAbs_OUT || State == TopAbs_UNKNOWN) continue;
      */

      gp_Pnt LastPnt = BRep_Tool::Pnt(LastVtx);
      Projector.Init(LastPnt, CurSurface);
      if (Projector.LowerDistance() > Precision::Confusion())
      {
        continue;
      }
      Projector.LowerDistanceParameters(U2, V2);

      /*
      State = Classifier.Perform(gp_Pnt2d( U2, V2 ),
                     ((HSurf->IsUPeriodic() || HSurf->IsVPeriodic())? true :
      false)); if (State == TopAbs_OUT || State == TopAbs_UNKNOWN) continue;
      */

      // Making the constraint
      NCollection_Array1<gp_Pnt2d> Points(1, 2);
      Points(1)                              = gp_Pnt2d(U1, V1);
      Points(2)                              = gp_Pnt2d(U2, V2);
      occ::handle<Geom2d_BezierCurve> Line2d = new Geom2d_BezierCurve(Points);
      TopoDS_Edge                     E = BRepLib_MakeEdge(Line2d, CurSurface, FirstVtx, LastVtx);
      Add(E, CurFace, myFreeConstraints(j).myOrder);
      VerSeq.Remove(i, i + 1);
      break;
    } // for (i = 1; i <= VerSeq.Length(); i += 2)
  } // for (j = 1; j <= myFreeConstraints.Length(); j++)

  // Load initial surface to myBuilder if it is given
  if (myIsInitFaceGiven)
  {
    occ::handle<BRepAdaptor_Surface> HSurfInit = new BRepAdaptor_Surface();
    HSurfInit->Initialize(myInitFace);
    myBuilder->LoadInitSurface(BRep_Tool::Surface(HSurfInit->Face()));
  }

  // Adding constraints to myBuilder
  AddConstraints(myBoundary);
  myBuilder->SetNbBounds(myBoundary.Length());
  AddConstraints(myConstraints);
  for (i = 1; i <= myPoints.Length(); i++)
  {
    myBuilder->Add(myPoints(i));
  }

  myBuilder->Perform();
  if (myBuilder->IsDone())
  {
    myIsDone = true;
  }
  else
  {
    myIsDone = false;
    return;
  }

  occ::handle<GeomPlate_Surface>   GPlate = myBuilder->Surface();
  occ::handle<Geom_BSplineSurface> Surface;
  // Approximation
  double dmax = 1.1 * myBuilder->G0Error(); //???????????
  // double dmax = myTol3d;
  if (!myIsInitFaceGiven)
  {
    double seuil; //?????

    NCollection_Sequence<gp_XY>  S2d;
    NCollection_Sequence<gp_XYZ> S3d;
    myBuilder->Disc2dContour(4, S2d);
    myBuilder->Disc3dContour(4, 0, S3d);
    seuil = std::max(myTol3d, 10 * myBuilder->G0Error()); //????????
    GeomPlate_PlateG0Criterion Criterion(S2d, S3d, seuil);
    GeomPlate_MakeApprox       Approx(GPlate, Criterion, myTol3d, myMaxSegments, myMaxDeg);
    Surface = Approx.Surface();
  }
  else
  {
    // clang-format off
      GeomPlate_MakeApprox Approx( GPlate, myTol3d, myMaxSegments, myMaxDeg, dmax, 0 ); //?????????????
      //GeomConvert_ApproxSurface Approx( GPlate, myTol3d, GeomAbs_C1, GeomAbs_C1, myMaxDeg, myMaxDeg, myMaxSegments, 1 );
      //Approx.Dump( std::cout );
    // clang-format on
    Surface = Approx.Surface();
  }

  // Build the final wire and final face
  NCollection_List<TopoDS_Shape>                              FinalEdges;
  occ::handle<NCollection_HArray1<occ::handle<Geom2d_Curve>>> CurvesOnPlate = myBuilder->Curves2d();
  BRep_Builder                                                BB;
  for (i = 1; i <= myBoundary.Length(); i++)
  {
    const TopoDS_Edge& InitEdge = myBoundary(i).myEdge;
    TopoDS_Edge        anEdge   = InitEdge;
    anEdge.Orientation(TopAbs_FORWARD);
    if (myOldNewMap.IsBound(anEdge))
    {
      anEdge = TopoDS::Edge(myOldNewMap(anEdge));
    }

    occ::handle<Geom2d_Curve> aCurveOnPlate = CurvesOnPlate->Value(i);

    TopoDS_Edge NewEdge = TopoDS::Edge(anEdge.EmptyCopied());

    TopoDS_Vertex V1, V2, NewV1, NewV2;
    TopExp::Vertices(anEdge, V1, V2);

    if (myOldNewMap.IsBound(V1))
    {
      NewV1 = TopoDS::Vertex(myOldNewMap(V1));
    }
    else
    {
      gp_Pnt aPnt = BRep_Tool::Pnt(V1);
      NewV1       = BRepLib_MakeVertex(aPnt);
      BB.UpdateVertex(NewV1, dmax);
      myOldNewMap.Bind(V1.Oriented(TopAbs_FORWARD), NewV1);
    }

    if (myOldNewMap.IsBound(V2))
    {
      NewV2 = TopoDS::Vertex(myOldNewMap(V2));
    }
    else
    {
      gp_Pnt aPnt = BRep_Tool::Pnt(V2);
      NewV2       = BRepLib_MakeVertex(aPnt);
      BB.UpdateVertex(NewV2, dmax);
      myOldNewMap.Bind(V2.Oriented(TopAbs_FORWARD), NewV2);
    }

    NewV1.Orientation(TopAbs_FORWARD);
    BB.Add(NewEdge, NewV1);
    NewV2.Orientation(TopAbs_REVERSED);
    BB.Add(NewEdge, NewV2);
    TopLoc_Location Loc;
    BB.UpdateEdge(NewEdge, aCurveOnPlate, Surface, Loc, dmax);
    // BRepLib::SameRange(NewEdge);
    BRepLib::SameParameter(NewEdge, dmax, true);
    FinalEdges.Append(NewEdge);
    myOldNewMap.Bind(InitEdge.Oriented(TopAbs_FORWARD), NewEdge.Oriented(TopAbs_FORWARD));
  }

  TopoDS_Wire FinalWire = WireFromList(FinalEdges);

  myFace = BRepLib_MakeFace(Surface, FinalWire);
}

//=================================================================================================

bool BRepFill_Filling::IsDone() const
{
  return myIsDone;
}

//=================================================================================================

TopoDS_Face BRepFill_Filling::Face() const
{
  return myFace;
}

//=======================================================================
// function : Generated
// purpose  : returns the new edge (first in list) made from old edge "S"
//=======================================================================
const NCollection_List<TopoDS_Shape>& BRepFill_Filling::Generated(const TopoDS_Shape& S)
{
  myGenerated.Clear();

  if (myOldNewMap.IsBound(S))
  {
    myGenerated.Append(myOldNewMap(S));
  }

  return myGenerated;
}

//==========================================================================
// function : G0Error
// purpose  : returns maximum distance from boundary to the resulting surface
//==========================================================================
double BRepFill_Filling::G0Error() const
{
  return myBuilder->G0Error();
}

//=======================================================================
// function : G1Error
// purpose  : returns maximum angle between the resulting surface
//           and constraint surfaces at boundaries
//======================================================================
double BRepFill_Filling::G1Error() const
{
  return myBuilder->G1Error();
}

//=======================================================================
// function : G2Error
// purpose  : returns maximum difference of curvature between
//           the resulting surface and constraint surfaces at boundaries
//======================================================================
double BRepFill_Filling::G2Error() const
{
  return myBuilder->G2Error();
}

//==========================================================================
// function : G0Error
// purpose  : returns maximum distance between the constraint number Index
//           and the resulting surface
//==========================================================================
double BRepFill_Filling::G0Error(const int Index)
{
  return myBuilder->G0Error(Index);
}

//==========================================================================
// function : G1Error
// purpose  : returns maximum angle between the constraint number Index
//           and the resulting surface
//==========================================================================
double BRepFill_Filling::G1Error(const int Index)
{
  return myBuilder->G1Error(Index);
}

//==========================================================================
// function : G2Error
// purpose  : returns maximum difference of curvature between
//           the constraint number Index and the resulting surface
//==========================================================================
double BRepFill_Filling::G2Error(const int Index)
{
  return myBuilder->G2Error(Index);
}