path: root/src/TopOpeBRepDS/TopOpeBRepDS_EXPORT.cxx

// File:	TopOpeBRepDS_EXPORT.cxx
// Created:	Mon Dec 15 16:48:33 1997
// Author:	Jean Yves LEBEY
//		<jyl@bistrox.paris1.matra-dtv.fr>
// Modified by xpu, Wed May 20 10:47:38 1998

#include <gp_Dir.hxx>
#include <gp_Pnt.hxx>
#include <gp_Pnt2d.hxx>
#include <Geom_Curve.hxx>
#include <TopoDS.hxx>
#include <BRep_Tool.hxx>
#include <BRepTools.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <Precision.hxx>
#include <GeomAdaptor_Surface.hxx>
#include <TColStd_DataMapOfIntegerInteger.hxx>
#include <TColStd_DataMapIteratorOfDataMapOfIntegerInteger.hxx>

#include <TopOpeBRepTool_CurveTool.hxx>
#include <TopOpeBRepTool_ShapeTool.hxx>
#include <TopOpeBRepTool_TOOL.hxx>
#include <TopOpeBRepTool_EXPORT.hxx>
#include <TopOpeBRepTool_SC.hxx>
#include <TopOpeBRepTool_makeTransition.hxx>
#include <Standard_ProgramError.hxx>

#include <TopOpeBRepDS_InterferenceTool.hxx>
#include <TopOpeBRepDS_BuildTool.hxx>
#include <TopOpeBRepDS_PointIterator.hxx>
#include <TopOpeBRepDS_BuildTool.hxx>
#include <TopOpeBRepDS_EXPORT.hxx>
#include <TopOpeBRepDS_connex.hxx>
#include <TopOpeBRepDS_TKI.hxx>
#include <TopOpeBRepDS_ProcessInterferencesTool.hxx>
#include <TopOpeBRepDS_DataMapOfShapeListOfShapeOn1State.hxx>
#include <TopOpeBRepDS_TOOL.hxx>
#include <TopOpeBRepDS_define.hxx>

#ifdef DEB
#include <TopOpeBRepDS_reDEB.hxx>
Standard_IMPORT Standard_Boolean TopOpeBRepDS_GettraceSPSX(const Standard_Integer);
Standard_EXPORT void debse1(const Standard_Integer i) {cout<<"+ debse1 se"<<i<<endl;}
Standard_EXPORT void debse2(const Standard_Integer i) {cout<<"+ debse2 se"<<i<<endl;}
Standard_EXPORT void debse3(const Standard_Integer i) {cout<<"+ debse3 se"<<i<<endl;}
Standard_EXPORT void debse4(const Standard_Integer i) {cout<<"+ debse4 se"<<i<<endl;}
Standard_EXPORT void debse5(const Standard_Integer i) {cout<<"+ debse5 se"<<i<<endl;}
Standard_EXPORT void debse6(const Standard_Integer i) {cout<<"+ debse6 se"<<i<<endl;}
Standard_EXPORT void debe7(const Standard_Integer i)  {cout<<"+ debe7 se"<<i<<endl;}
Standard_EXPORT void debse8(const Standard_Integer i) {cout<<"+ debse8 se"<<i<<endl;}
Standard_EXPORT void debe9(const Standard_Integer i)  {cout<<"+ debe9 se"<<i<<endl;}
Standard_EXPORT void debgb1(const Standard_Integer i) {cout<<"+ debgb1 se"<<i<<endl;}
Standard_EXPORT void debse9(const Standard_Integer i) {cout<<"+ debse9 se"<<i<<endl;}
Standard_EXPORT void debsdm1(const Standard_Integer i) {cout<<"+ debsdm1 se"<<i<<endl;}
Standard_EXPORT void debsamsha(const Standard_Integer i) {cout<<"+ debsamsha se"<<i<<endl;}
Standard_EXPORT void debcompletefei(const Standard_Integer i) {cout<<"+ debcompletefei f"<<i<<endl;}
#endif
static void FUN_Raise() 
{
#ifdef DEB
//  cout<<"FUN_ds_completeforSE"<<endl;
// Standard_ProgramError::Raise("FUN_ds_completeforSE");
#endif
}

#define M_IN(st)  (st == TopAbs_IN)
#define M_ON(st)  (st == TopAbs_ON)
#define M_OUT(st) (st == TopAbs_OUT)
#define M_FORWARD(st)  (st == TopAbs_FORWARD)
#define M_UNKNOWN(st)  (st == TopAbs_UNKNOWN)
#define M_REVERSED(st) (st == TopAbs_REVERSED)
#define M_INTERNAL(st) (st == TopAbs_INTERNAL)
#define M_EXTERNAL(st) (st == TopAbs_EXTERNAL)

//------------------------------------------------------
Standard_EXPORT void FDS_SetT(TopOpeBRepDS_Transition& T, const TopOpeBRepDS_Transition& T0)
//------------------------------------------------------
{ 
  TopAbs_State stb = T0.Before(), sta = T0.After();
  T.Before(stb); T.After(sta);
}

//------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_hasUNK(const TopOpeBRepDS_Transition& T)
//------------------------------------------------------
{
  TopAbs_State stb = T.Before(), sta = T.After();
  Standard_Boolean hasunknown = (M_UNKNOWN(stb) || M_UNKNOWN(sta));
  return hasunknown;
}

//------------------------------------------------------
Standard_EXPORT void FDS_copy(const TopOpeBRepDS_ListOfInterference& LI, TopOpeBRepDS_ListOfInterference& LII)
//------------------------------------------------------
{
  for (TopOpeBRepDS_ListIteratorOfListOfInterference it(LI); it.More(); it.Next()) LII.Append(it.Value());
}

//------------------------------------------------------
Standard_EXPORT void FDS_copy(const TopTools_ListOfShape& LI, TopTools_ListOfShape& LII)
//------------------------------------------------------
{
  for (TopTools_ListIteratorOfListOfShape it(LI); it.More(); it.Next()) LII.Append(it.Value());
}
//------------------------------------------------------
Standard_EXPORT void FDS_assign(const TopOpeBRepDS_ListOfInterference& LI, TopOpeBRepDS_ListOfInterference& LII)
//------------------------------------------------------
{
  LII.Clear(); FDS_copy(LI,LII);
}

//------------------------------------------------------
Standard_EXPORT void FDS_assign(const TopTools_ListOfShape& LI, TopTools_ListOfShape& LII)
//------------------------------------------------------
{
  LII.Clear(); FDS_copy(LI,LII);
}

//------------------------------------------------------
Standard_EXPORT void FUN_ds_samRk(const TopOpeBRepDS_DataStructure& BDS, const Standard_Integer Rk,
				  TopTools_ListOfShape& LI, TopTools_ListOfShape & LIsrk)
//------------------------------------------------------
{
  LIsrk.Clear();
  TopTools_ListIteratorOfListOfShape it(LI); 
  while (it.More()) {
    const TopoDS_Shape& S = it.Value(); Standard_Integer rk = BDS.AncestorRank(S);
    if (rk == Rk) {LIsrk.Append(S);LI.Remove(it);}
    else it.Next();
  }
}

//------------------------------------------------------
Standard_EXPORT void FDS_dumpLI
//------------------------------------------------------
#ifndef DEB
(const TopOpeBRepDS_ListOfInterference& ,const char* )
{
#else
(const TopOpeBRepDS_ListOfInterference& LI,const char* str)
{
  for(TopOpeBRepDS_ListIteratorOfListOfInterference itD(LI);itD.More();itD.Next()) {
    if(str) cout<<str; itD.Value()->Dump(cout); cout<<endl;
  }
#endif
}

//------------------------------------------------------
Standard_EXPORT void FDS_Tdata
//------------------------------------------------------
(const Handle(TopOpeBRepDS_Interference)& I,TopAbs_ShapeEnum& SB,Standard_Integer& IB,TopAbs_ShapeEnum& SA,Standard_Integer& IA)
{	
  if (I.IsNull()) return;
  const TopOpeBRepDS_Transition T = I->Transition();
  SB = T.ShapeBefore(); IB = T.IndexBefore();
  SA = T.ShapeAfter();  IA = T.IndexAfter();
}

//------------------------------------------------------
Standard_EXPORT void FDS_data
//------------------------------------------------------
(const Handle(TopOpeBRepDS_Interference)& I,TopOpeBRepDS_Kind& GT1,Standard_Integer& G1,TopOpeBRepDS_Kind& ST1,Standard_Integer& S1)
{	
  if (I.IsNull()) return;
  GT1 = I->GeometryType(); G1 = I->Geometry();
  ST1 = I->SupportType();  S1 = I->Support(); 
}

// true si la transition de l'interference courante es UNKNOWN
//------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_data
//------------------------------------------------------
(const TopOpeBRepDS_ListIteratorOfListOfInterference& it1,Handle(TopOpeBRepDS_Interference)& I1,TopOpeBRepDS_Kind& GT1,Standard_Integer& G1,TopOpeBRepDS_Kind& ST1,Standard_Integer& S1)
{
  if (!it1.More()) return Standard_False;
  I1 = it1.Value(); const TopOpeBRepDS_Transition& T1 = I1->Transition();
  FDS_data(I1,GT1,G1,ST1,S1); 
  Standard_Boolean isunk1 = T1.IsUnknown();
  return isunk1;
}

//------------------------------------------------------
Standard_EXPORT void FDS_Idata
//------------------------------------------------------
(const Handle(TopOpeBRepDS_Interference)& I,TopAbs_ShapeEnum& SB,Standard_Integer& IB,TopAbs_ShapeEnum& SA,Standard_Integer& IA,
 TopOpeBRepDS_Kind& GT1,Standard_Integer& G1,TopOpeBRepDS_Kind& ST1,Standard_Integer& S1)
{	
  if (I.IsNull()) return;
  FDS_Tdata(I,SB,IB,SA,IA);
  FDS_data(I,GT1,G1,ST1,S1);
}

//------------------------------------------------------
Standard_EXPORT Standard_Boolean FUN_ds_getVsdm
(const TopOpeBRepDS_DataStructure& BDS, const Standard_Integer iV, Standard_Integer& iVsdm)
//------------------------------------------------------
{
  iVsdm = 0;
  Standard_Boolean found = Standard_False;
  // getting <Vsdm> shape same domain with <V>.
  Standard_Integer imax = BDS.NbShapes();
  Standard_Boolean undef = (iV < 1) || (iV > imax);
  if (undef) return Standard_False;
  const TopoDS_Shape& V = BDS.Shape(iV);
  TopTools_ListIteratorOfListOfShape issdm(BDS.ShapeSameDomain(V));
  for (; issdm.More(); issdm.Next()){
    const TopoDS_Shape& VV = issdm.Value();
    if (V.IsSame(VV)) continue;
    iVsdm = BDS.Shape(VV); 
    found = Standard_True; break;
  }
  return found;
}

//------------------------------------------------------
Standard_EXPORT Standard_Boolean FUN_ds_sdm
(const TopOpeBRepDS_DataStructure& BDS, const TopoDS_Shape& s1, const TopoDS_Shape& s2)
//------------------------------------------------------
{
  if (!BDS.HasShape(s1) || !BDS.HasShape(s2)) return Standard_False;
  const TopTools_ListOfShape& sdm1 = BDS.ShapeSameDomain(s1);
  TopTools_ListIteratorOfListOfShape it1(sdm1);
  for (; it1.More(); it1.Next()) 
    if (it1.Value().IsSame(s2)) return Standard_True;
  return Standard_False;
}

// True si les faces isb1,isb2, issues du meme shape origine, connexes par l'arete SI, sont tangentes.
// 1/ analyse du codage SameDomain dans la DS.
// 2/ si pas de codage SameDomain dans la DS, analyse geometrique.
//    cette deuxieme analyse est necessaire car l'info SameDomain n'est pas recherchee entre les
//    faces d'un meme shape origine.
//------------------------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_aresamdom(const TopOpeBRepDS_DataStructure& BDS,const TopoDS_Shape& ES,const TopoDS_Shape& F1,const TopoDS_Shape& F2)
//------------------------------------------------------------------------------------
{
  Standard_Boolean trfa_samdom = Standard_False;
  const TopTools_ListOfShape& ls = BDS.ShapeSameDomain(F1);
  TopTools_ListIteratorOfListOfShape it(ls);
  for(;it.More();it.Next()) { // NYI : syntaxe rapide de BDS IsShapeSameDomainofShape
    const TopoDS_Shape& ss = it.Value();
    trfa_samdom = ss.IsSame(F2);
    if (trfa_samdom) break;
  }
  if ( !trfa_samdom ) {
    Handle(Geom_Surface) su1 = TopOpeBRepTool_ShapeTool::BASISSURFACE(TopoDS::Face(F1));
    GeomAdaptor_Surface gs1(su1); GeomAbs_SurfaceType st1 = gs1.GetType();
    Handle(Geom_Surface) su2 = TopOpeBRepTool_ShapeTool::BASISSURFACE(TopoDS::Face(F2));
    GeomAdaptor_Surface gs2(su2); GeomAbs_SurfaceType st2 = gs2.GetType();
    Standard_Boolean plpl = (st1 == GeomAbs_Plane) && ( st2 == GeomAbs_Plane);
    if (plpl) {
      // NYI a arranger
      gp_Pnt2d p2d1,p2d2; BRep_Tool::UVPoints(TopoDS::Edge(ES),TopoDS::Face(F1),p2d1,p2d2);
      gp_Dir d1 = FUN_tool_ngS(p2d1,su1);      
      gp_Dir d2 = FUN_tool_ngS(p2d2,su2);      
      Standard_Real tola = Precision::Angular();
      Standard_Real dot = d1.Dot(d2);
      trfa_samdom = (Abs(1. - Abs(dot)) < tola);
    }
  }
  return trfa_samdom;
}

// True si les faces isb1,isb2, issues du meme shape origine, connexes par l'arete SI, sont tangentes.
// 1/ analyse du codage SameDomain dans la DS.
// 2/ si pas de codage SameDomain dans la DS, analyse geometrique.
//    cette deuxieme analyse est necessaire car l'info SameDomain n'est pas recherchee entre les
//    faces d'un meme shape origine.
//------------------------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_aresamdom(const TopOpeBRepDS_DataStructure& BDS,const Standard_Integer SI,const Standard_Integer isb1,const Standard_Integer isb2)
//------------------------------------------------------------------------------------
{
  Standard_Boolean trfa_samdom = Standard_False;
  const TopoDS_Shape& ES = BDS.Shape(SI); // edge de F1 et F2
  if (ES.ShapeType() != TopAbs_EDGE) return Standard_False;
  const TopoDS_Shape& F1 = BDS.Shape(isb1);
  if (F1.ShapeType() != TopAbs_FACE) return Standard_False;
  const TopoDS_Shape& F2 = BDS.Shape(isb2);
  if (F2.ShapeType() != TopAbs_FACE) return Standard_False;
  trfa_samdom = FDS_aresamdom(BDS,ES,F1,F2);
  return trfa_samdom;
}

//----------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_EdgeIsConnexToSameDomainFaces
(const TopoDS_Shape& E,const Handle(TopOpeBRepDS_HDataStructure)& HDS)  // not used
//----------------------------------------------------
{
  const TopOpeBRepDS_DataStructure& BDS = HDS->DS();
  const TopTools_ListOfShape& lf = FDSCNX_EdgeConnexitySameShape(E,HDS);
  Standard_Integer nlf = lf.Extent();
  if (nlf < 2) return Standard_False;

  Standard_Boolean samdom = Standard_False;
  TopTools_ListIteratorOfListOfShape i1(lf);
  for(;i1.More();i1.Next()) {
    const TopoDS_Shape& f1 = i1.Value();
    TopTools_ListIteratorOfListOfShape i2(i1);
    for(;i2.More();i2.Next()) {
      const TopoDS_Shape& f2 = i2.Value();
      samdom = FDS_aresamdom(BDS,E,f1,f2);
      if (samdom) break;
    }
    if (samdom) break;
  }
  if (samdom) return Standard_True;
  return Standard_False;
} // not used


// T si ShapeIndex SI est la GeometrieIndex d'une Interference
// d'un Shape (Before ou After) de la Transition de I
//----------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_SIisGIofIofSBAofTofI(const TopOpeBRepDS_DataStructure& BDS,const Standard_Integer SI,const Handle(TopOpeBRepDS_Interference)& I)
//----------------------------------------------------
{
  if (SI == 0) return Standard_False;
  if (I.IsNull()) return Standard_False;
  Standard_Boolean ya = Standard_False;
  
#ifdef DEB
//  const TopOpeBRepDS_Transition& T1 = I->Transition();
#endif
  TopAbs_ShapeEnum SB1,SA1;Standard_Integer IB1,IA1;TopOpeBRepDS_Kind GT1,ST1;Standard_Integer G1,S1;
  FDS_Idata(I,SB1,IB1,SA1,IA1,GT1,G1,ST1,S1);
  
  if (SB1 == TopAbs_FACE) {
    const TopOpeBRepDS_ListOfInterference& Bloi = BDS.ShapeInterferences(IB1);
    TopOpeBRepDS_ListIteratorOfListOfInterference it(Bloi);
    for(; it.More(); it.Next()) {
      const Handle(TopOpeBRepDS_Interference)& IB = it.Value();
      TopAbs_ShapeEnum SBB,SAB;Standard_Integer IBB,IAB;TopOpeBRepDS_Kind GTB = TopOpeBRepDS_UNKNOWN,STB;Standard_Integer GB = 0,SB;
      FDS_Idata(IB,SBB,IBB,SAB,IAB,GTB,GB,STB,SB);
      if (GTB == TopOpeBRepDS_EDGE && GB == SI) {
	// la face IB1 a une interference dont la geometrie est l'arete SI.
	ya = Standard_True;
	break;
      }
    }
  } // SB1 == FACE
  else if (SA1 == TopAbs_FACE) {
    const TopOpeBRepDS_ListOfInterference& Aloi = BDS.ShapeInterferences(IA1);
    TopOpeBRepDS_ListIteratorOfListOfInterference it(Aloi);
    for(; it.More(); it.Next()) {
      const Handle(TopOpeBRepDS_Interference)& IA = it.Value();
      TopAbs_ShapeEnum SBA,SAA;Standard_Integer IBA,IAA;TopOpeBRepDS_Kind GTA = TopOpeBRepDS_UNKNOWN,STA;Standard_Integer GA = 0,SA;
      FDS_Idata(IA,SBA,IBA,SAA,IAA,GTA,GA,STA,SA);
      if (GTA == TopOpeBRepDS_EDGE && GA == SI) {
	// la face IA1 a une interference dont la geometrie est l'arete IS.
	ya = Standard_True;
	break;
      }
    }
  } // SA1 == FACE
  
  return ya;
}

//---------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_Parameter(const Handle(TopOpeBRepDS_Interference)& I, Standard_Real& par)
//---------------------------------------------------------
{
  Standard_Boolean isEVI = I->IsKind(STANDARD_TYPE(TopOpeBRepDS_EdgeVertexInterference));
  Standard_Boolean isCPI = I->IsKind(STANDARD_TYPE(TopOpeBRepDS_CurvePointInterference));
  if (!isEVI && !isCPI) return Standard_False;
  par = FDS_Parameter(I);
  return Standard_True;
}

//----------------------------------------------------
Standard_EXPORT Standard_Real FDS_Parameter(const Handle(TopOpeBRepDS_Interference)& I)
//----------------------------------------------------
{ 
  Standard_Real p = 0; 
  if      ( I->IsKind(STANDARD_TYPE(TopOpeBRepDS_EdgeVertexInterference)) )
    p = Handle(TopOpeBRepDS_EdgeVertexInterference)::DownCast(I)->Parameter();
  else if ( I->IsKind(STANDARD_TYPE(TopOpeBRepDS_CurvePointInterference)) )
    p = Handle(TopOpeBRepDS_CurvePointInterference)::DownCast(I)->Parameter();
  else {
#ifdef DEB
    cout<<"EdgeInterference : mauvais type d'interference"<<endl;
#endif
    Standard_Failure::Raise("FDS_Parameter");
  }
  return p;
}

//----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_HasSameDomain3d(const TopOpeBRepDS_DataStructure& BDS,const TopoDS_Shape& E,TopTools_ListOfShape* PLSD)
//-----------------------------------------------------------------------
{
  const TopTools_ListOfShape& lssd = BDS.ShapeSameDomain(E);
  Standard_Boolean hsd = (! lssd.IsEmpty());
  if (PLSD != NULL) PLSD->Clear();
  if (!hsd) return Standard_False;

  Standard_Boolean hsd3d = Standard_False;
  TopTools_ListIteratorOfListOfShape it(lssd);
  for (; it.More(); it.Next()) {
    const TopoDS_Shape& esd = it.Value();
#ifdef DEB
//    Standard_Integer iesd = BDS.Shape(esd);
//    Standard_Integer resd = BDS.SameDomainInd(esd);
#endif
    TopOpeBRepDS_Config c = BDS.SameDomainOri(esd);
    Standard_Boolean ok = Standard_True;
    ok = ok && (c == TopOpeBRepDS_UNSHGEOMETRY);
    if (ok) {
      hsd3d = Standard_True; 
      if (PLSD != NULL) PLSD->Append(esd);
      else break;
    }
  }
  return hsd3d;
}

//-----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_Config3d(const TopoDS_Shape& E1,const TopoDS_Shape& E2,TopOpeBRepDS_Config& c)
//-----------------------------------------------------------------------
{
  Standard_Boolean same = Standard_True;

  gp_Pnt PE1;Standard_Real pE1;
  Standard_Boolean ok1 = FUN_tool_findPinE(TopoDS::Edge(E1),PE1,pE1);
  gp_Vec VE1; if (ok1) ok1 = TopOpeBRepTool_TOOL::TggeomE(pE1,TopoDS::Edge(E1),VE1);

  Standard_Real pE2,dE2;
  Standard_Boolean ok2 = FUN_tool_projPonE(PE1,TopoDS::Edge(E2),pE2,dE2);
  gp_Vec VE2; if (ok2) ok2 = TopOpeBRepTool_TOOL::TggeomE(pE2,TopoDS::Edge(E2),VE2);
  
  if (!ok1 || !ok2) return Standard_False;
  
  gp_Dir DE1(VE1);
  gp_Dir DE2(VE2);
  Standard_Real dot = DE1.Dot(DE2);
  same = (dot > 0);
  c = (same) ? TopOpeBRepDS_SAMEORIENTED : TopOpeBRepDS_DIFFORIENTED;
  return Standard_True;
}

//----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FDS_HasSameDomain2d(const TopOpeBRepDS_DataStructure& BDS,const TopoDS_Shape& E,TopTools_ListOfShape* PLSD)
//-----------------------------------------------------------------------
{
  const TopTools_ListOfShape& lssd = BDS.ShapeSameDomain(E);
  Standard_Boolean hsd = (! lssd.IsEmpty());
  if (PLSD != NULL) PLSD->Clear();
  if (!hsd) return Standard_False;

  Standard_Boolean hsd2d = Standard_False;
  TopTools_ListIteratorOfListOfShape it(lssd);
  for (; it.More(); it.Next()) {
    const TopoDS_Shape& esd = it.Value();
#ifdef DEB
//    Standard_Integer iesd = BDS.Shape(esd);
//    Standard_Integer resd = BDS.SameDomainInd(esd);
#endif
    TopOpeBRepDS_Config c = BDS.SameDomainOri(esd);
    Standard_Boolean ok = (c == TopOpeBRepDS_SAMEORIENTED || c == TopOpeBRepDS_DIFFORIENTED);
    if (ok) {
      hsd2d = Standard_True; 
      if (PLSD != NULL) PLSD->Append(esd);
      else break;
    }
  }
  return hsd2d;
}

//-----------------------------------------------------------------------
Standard_EXPORT void FDS_getupperlower
(const Handle(TopOpeBRepDS_HDataStructure)& HDS,
 const Standard_Integer edgeIndex,
 const Standard_Real paredge,
 Standard_Real& p1, Standard_Real& p2)
//-----------------------------------------------------------------------
{
  TopoDS_Edge E = TopoDS::Edge(HDS->Shape(edgeIndex));
  FUN_tool_bounds(E,p1,p2);

  // get p1, p2, p1<paredge<p2 with pmin, pmax nearest parameters
  Standard_Real par;
  TopOpeBRepDS_PointIterator pIte = HDS->EdgePoints(E);
  for (;pIte.More();pIte.Next()) {
    par = pIte.Parameter();
    Standard_Boolean parsup1 = (par > p1), parinfe = (par < paredge);
    Standard_Boolean parinf2 = (par < p2), parsupe = (par > paredge);
    if (parsup1 && parinfe) p1 = par;
    if (parinf2 && parsupe) p2 = par;
  } 
}

// ----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FUN_ds_getoov(const TopoDS_Shape& v, const TopOpeBRepDS_DataStructure& BDS, TopoDS_Shape& oov)
//-----------------------------------------------------------------------
{
  // prequesitory : the DS binds at most 2 vertices same domain
  TopoDS_Shape nullS; oov = nullS;
  const TopTools_ListOfShape& vsd = BDS.ShapeSameDomain(v);
  TopTools_ListIteratorOfListOfShape itlov(vsd);
  for (; itlov.More(); itlov.Next()){
    const TopoDS_Shape& vcur = itlov.Value();
    if (vcur.IsSame(v)) continue;
    oov = vcur;
    return Standard_True;
  }
  return Standard_False;
}

// ----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FUN_ds_getoov(const TopoDS_Shape& v, const Handle(TopOpeBRepDS_HDataStructure)& HDS, TopoDS_Shape& oov)
//-----------------------------------------------------------------------
{
  // prequesitory : the DS binds at most 2 vertices same domain
  TopoDS_Shape nullS; oov = nullS;
  if (HDS->HasSameDomain(v)) {
    TopTools_ListIteratorOfListOfShape itlov(HDS->SameDomain(v));
    for (; itlov.More(); itlov.Next()){
      const TopoDS_Shape& vcur = itlov.Value();
      if (vcur.IsSame(v)) continue;
      oov = vcur;
      return Standard_True;
    }
  }
  return Standard_False;
}
 
Standard_EXPORT Standard_Boolean FUN_selectTRAINTinterference(const TopOpeBRepDS_ListOfInterference& li, TopOpeBRepDS_ListOfInterference& liINTERNAL)
{
  liINTERNAL.Clear();
  TopOpeBRepDS_ListIteratorOfListOfInterference it(li);
  for (; it.More(); it.Next()){
    const Handle(TopOpeBRepDS_Interference)& I = it.Value();
    const TopAbs_Orientation ori = I->Transition().Orientation(TopAbs_IN);
    if (M_INTERNAL(ori)) liINTERNAL.Append(I);
  }
  Standard_Boolean hasINT = !liINTERNAL.IsEmpty();
  return hasINT;
}

static Standard_Boolean FUN_ds_hasSDMancestorfaces
(const Handle(TopOpeBRepDS_HDataStructure)& HDS, const TopoDS_Edge& E1,const TopoDS_Edge& E2, TopoDS_Face& Fsd1,TopoDS_Face& Fsd2)
{
  const TopOpeBRepDS_DataStructure& BDS = HDS->DS();

  const TopTools_ListOfShape& lFcE1 = FDSCNX_EdgeConnexitySameShape(E1,HDS);
  const TopTools_ListOfShape& lFcE2 = FDSCNX_EdgeConnexitySameShape(E2,HDS);

  TopTools_IndexedMapOfShape mapfcE2; 
  TopTools_ListIteratorOfListOfShape it2(lFcE2);
  for (; it2.More(); it2.Next()) mapfcE2.Add(it2.Value());

  TopTools_ListIteratorOfListOfShape it1(lFcE1);
  for (; it1.More(); it1.Next()){
    const TopoDS_Shape& fcE1 = it1.Value();
    Standard_Boolean hsdm1 = HDS->HasSameDomain(fcE1);
    if (!hsdm1) continue;
    const TopTools_ListOfShape& fsdm2 = BDS.ShapeSameDomain(fcE1);
    it2.Initialize(fsdm2);
    for (; it2.More(); it2.Next()){
      const TopoDS_Shape& f2 = it2.Value();
      Standard_Boolean isb2 = mapfcE2.Contains(f2);
      if (!isb2) continue;
      Fsd1 = TopoDS::Face(fcE1); Fsd2 = TopoDS::Face(f2);
      return Standard_True;
    }
  }
  return Standard_False;
}

//unreferenced function, commented
/*#ifdef DEB
static Standard_Integer FUN_ds_FaceConnexitySameShape(const TopoDS_Vertex& V, const TopoDS_Edge& E, const Handle(TopOpeBRepDS_HDataStructure)& HDS,
					 TopTools_ListOfShape& lFcx)
// very expensive, but found no other way (nyi : modify DS_connex.cxx)     
{
  lFcx.Clear();
#ifdef DEB
//  const TopOpeBRepDS_DataStructure& BDS = HDS->DS();
#endif
  const TopTools_ListOfShape& lf1 = FDSCNX_EdgeConnexitySameShape(E,HDS);
  Standard_Integer nlf1 = lf1.Extent();
  if (nlf1 < 2) return Standard_False;

  TopTools_MapOfShape mapf;
  TopTools_ListIteratorOfListOfShape it1(lf1);
  for (; it1.More(); it1.Next()){
    const TopoDS_Shape& f = it1.Value();
    mapf.Add(f);
    TopExp_Explorer exe(f,TopAbs_EDGE);
    for (; exe.More(); exe.Next()){
      const TopoDS_Edge& e = TopoDS::Edge(exe.Current());
      if (e.IsSame(E)) continue;
      Standard_Integer iori = FUN_tool_orientVinE(V,e);
      if (iori == 0) continue;
      const TopTools_ListOfShape& lf2 = FDSCNX_EdgeConnexitySameShape(e,HDS);
      TopTools_ListIteratorOfListOfShape it2(lf2);
      for (; it2.More(); it2.Next()) mapf.Add(it2.Value());
    } // exe
  } // it1
  TopTools_MapIteratorOfMapOfShape itm(mapf);
  for (; itm.More(); itm.Next()) lFcx.Append(itm.Key());
  return lFcx.Extent();
}
#endif*/

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_PURGEforE9(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
{
  // xpu040998 : line gives myLineINL=true, interference on geometry
  //             edge/face describing contact on geometry -> EPIe + EPIf = 3dI
  //             EPIf is faulty if edge is in face's geometry  
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  for (Standard_Integer i = 1; i <= ns; i++) {
    const TopoDS_Shape& EE = BDS.Shape(i);
    if (EE.ShapeType() != TopAbs_EDGE) continue;
 
    const TopoDS_Edge& E = TopoDS::Edge(EE);
    Standard_Boolean isdgE = BRep_Tool::Degenerated(E); 
    if (isdgE) continue;

    Standard_Integer IE = BDS.Shape(E);
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(IE);
    if (trc) debe9(IE);
#endif
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(E); 
    TopOpeBRepDS_ListOfInterference LIcopy; FDS_assign(LI,LIcopy);
    TopOpeBRepDS_ListOfInterference l3dF; Standard_Integer n3dF = FUN_selectSKinterference(LIcopy,TopOpeBRepDS_FACE,l3dF);    
    if (n3dF == 0) continue;
    
    const TopTools_ListOfShape& lfcxE = FDSCNX_EdgeConnexitySameShape(E,HDS);
    Standard_Integer nlfcxE = lfcxE.Extent();
    if (nlfcxE == 0) continue; // NYIRaise
    TopTools_ListIteratorOfListOfShape itf(lfcxE);
    TopTools_IndexedMapOfShape mapf; for (; itf.More(); itf.Next()) mapf.Add(itf.Value());

    Standard_Boolean removed = Standard_False;
    TopOpeBRepDS_ListIteratorOfListOfInterference it(l3dF);
    while (it.More()) {
      const Handle(TopOpeBRepDS_Interference)& I = it.Value();
      TopAbs_ShapeEnum SB,SA;Standard_Integer IB,IA;TopOpeBRepDS_Kind GT,ST;Standard_Integer G,S = 0;
      FDS_Idata(I,SB,IB,SA,IA,GT,G,ST,S);      
      Standard_Boolean FhasGE = FDS_SIisGIofIofSBAofTofI(BDS,IE,I);
      if (FhasGE) {removed = Standard_True; l3dF.Remove(it); continue;} // E has split ON F (cto904A3;e19,f14)
      const TopoDS_Shape& F = BDS.Shape(S);
      Standard_Boolean hsdm = HDS->HasSameDomain(F);
      if (!hsdm) {it.Next(); continue;}
      TopTools_ListIteratorOfListOfShape issdm(BDS.ShapeSameDomain(F));
      Standard_Boolean foundinsdm = Standard_False;
      for (; issdm.More(); issdm.Next())
	if (mapf.Contains(issdm.Value())) {foundinsdm = Standard_True; break;}
      if (!foundinsdm) {it.Next(); continue;} // E is IN geometry(F) (cto002D2;e33,f31)

      // E is edge of FF sdm with F
#ifdef DEB
      if (trc) {cout<<"-> SE9 removing I3dF :";I->Dump(cout);cout<<endl;}
#endif
      removed = Standard_True; l3dF.Remove(it);
    } //it(l3dF)

    if (!removed) continue;
    TopOpeBRepDS_ListOfInterference& LII = BDS.ChangeShapeInterferences(E); 
    LII.Clear(); LII.Append(LIcopy); LII.Append(l3dF);
  } //i=1..ns
} // PURGEforE9

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE1(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
{
  // xpu160398 complement for INTERNAL transitions on section edge
  // recall : we add geometry G on section edge SE only if 
  //             SE has ISE=(T(face F),G,edge ES),
  //          && F  has IF =(T,SE,S).
  //
  // purpose : SE has ISE=(T(face F'),G,edge),
  //           F' has no interference with support==SE 
  //          => looking for F / F and F' share ES, 
  //                             F sdm with Fanc (one face ancestor of ES)
  //                             F has I' = (T,SE,S).
  // cto 009 D1
  
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();

  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
    Standard_Integer ISE = BDS.Shape(SE);
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(SE);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse1(ISE);
#endif

    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);  
    for (tki.Init(); tki.More(); tki.Next()) {     

      // ISE = (INTERNAL(FACE),G,EDGE) :
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);      
      TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);
      TopOpeBRepDS_ListOfInterference lI1; Standard_Boolean hasINT = ::FUN_selectTRAINTinterference(loicopy,lI1);
      if (!hasINT) continue;
      TopOpeBRepDS_ListOfInterference lI2; Standard_Integer nI = FUN_selectTRASHAinterference(lI1,TopAbs_FACE,lI2);
      if (nI < 1) continue; 
      TopOpeBRepDS_ListOfInterference lI3; nI = FUN_selectSKinterference(lI2,TopOpeBRepDS_EDGE,lI3);
      if (nI < 1) continue; 

      Standard_Boolean keepI = Standard_False;            
//      for (TopOpeBRepDS_ListIteratorOfListOfInterference it(lI3) ;it.More(); it.Next()){
      TopOpeBRepDS_ListIteratorOfListOfInterference it(lI3) ;
      for ( ;it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& I = it.Value();
	keepI = FDS_SIisGIofIofSBAofTofI(BDS,ISE,I);
	if (keepI) break;
      }
      if (keepI) continue; 
      
      // ISE = (INTERNAL(F),G,ES), F has no I with G==SE
      // find fSE / fSE (SE's ancestor face) has  IfSE = (T,SE,support)  
      //            - fSE sdm & fES (ES's ancestor face) -
//      for (it.Initialize(lI3) ;it.More(); it.Next()){
      it.Initialize(lI3) ;
      for ( ;it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& I = it.Value();
#ifdef DEB
//	const TopOpeBRepDS_Transition& T = I->Transition();
#endif
	TopOpeBRepDS_Kind GT,ST;
        Standard_Integer G1 = 0,S = 0;
        FDS_data(I,GT,G1,ST,S);
	TopAbs_ShapeEnum tsb,tsa; Standard_Integer isb,isa; FDS_Tdata(I,tsb,isb,tsa,isa);
	const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(S)); 
	TopoDS_Face fSE,fES; Standard_Boolean sdmf = ::FUN_ds_hasSDMancestorfaces(HDS,SE,ES, fSE,fES);
	if (!sdmf) continue;
	Standard_Integer IfES = BDS.Shape(fES);

	const TopOpeBRepDS_ListOfInterference& LIf = BDS.ShapeInterferences(fES);
	TopOpeBRepDS_ListOfInterference LIfcopy; FDS_copy(LIf,LIfcopy);
	TopOpeBRepDS_ListOfInterference LIfound; Standard_Integer nfound = FUN_selectGIinterference(LIfcopy,ISE,LIfound);
	if (nfound < 1) continue; 

	// cto 009 B1 : Ifor=(FORWARD(IfES),G1,S) && Irev=(REVERSED(IfES),G1,S)
	//         -> do NOT reduce to I = (INTERNAL(IfES),G1,S) (we can have EXTERNAL Tr) 	 
	FDS_copy(loi,loicopy); 
	TopOpeBRepDS_ListOfInterference lI4;
#ifdef DEB
//        Standard_Integer nI4 =
#endif
                  FUN_selectITRASHAinterference(loicopy,IfES,lI4);
	Standard_Boolean hasFORREV=Standard_False;
	TopOpeBRepDS_ListOfInterference lfor; Standard_Integer nFOR = FUN_selectTRAORIinterference(lI4,TopAbs_FORWARD,lfor);
	TopOpeBRepDS_ListOfInterference lrev; Standard_Integer nREV = FUN_selectTRAORIinterference(lI4,TopAbs_REVERSED,lrev);
	hasFORREV = (nFOR > 0) || (nREV > 0); 
	if (hasFORREV) break;

	// newI : 
	// -----
	TopOpeBRepDS_Transition newT(TopAbs_INTERNAL);
        newT.Index(IfES);
	Standard_Real par = FDS_Parameter(I);
	Standard_Boolean isevi = I->IsKind(STANDARD_TYPE(TopOpeBRepDS_EdgeVertexInterference));
	Standard_Boolean B = Standard_False;
	if (isevi) B = Handle(TopOpeBRepDS_EdgeVertexInterference)::DownCast(I)->GBound();
	Handle(TopOpeBRepDS_Interference) newI = MakeEPVInterference(newT,S,G1,par,K,TopOpeBRepDS_EDGE,B);
#ifdef DEB
	if (trc) {
          cout<<"completeforSE1 on section edge "<<ISE<<" ";
          newI->Dump(cout);
          cout<<endl;
        }
#endif
	HDS->StoreInterference(newI,SE); 
	break;
      } // it(lI3) 
    } // tki    
  } // i=1..nse
} // completeforSE1

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE2(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
{
  // xpu250398 compute 3dI
  // recall : to have spOUT(SE) / spIN(SE) with SE section edge on bound G
  //          we need IF = (T(F),G,F) with G not SE bound. 
  //   
  // purpose : Sometimes for gap's reasons we can miss such interference.
  //           attached to ES, IFE = (T(FTRA),G,ES) with G not Gbound 
  //           we find no IF = (T(FTRA),G,FTRA) 
  //           1. look for FCX / FCX shares ES with FTA (recall : rkG==rkFCX)
  //           2. compute I3d = (T2(FCX),G,FCX)
  //   !!! if SE has splits ON F near G (if we have a 2dI near G) -> do NOT add I3d
  // PRO12696 : on se 46 (create FEI/ f50) 
        
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();

  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = TopoDS::Edge(BDS.SectionEdge(i));
    Standard_Integer rkSE = BDS.AncestorRank(SE);
#ifdef DEB    
    Standard_Integer ISE =
#endif
              BDS.Shape(SE);
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(SE);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse2(ISE);
#endif

    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);      
    for (tki.Init(); tki.More(); tki.Next()) {     

      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);   
      Standard_Boolean point  = (K == TopOpeBRepDS_POINT);
      Standard_Boolean vertex = (K == TopOpeBRepDS_VERTEX);

      // interferences on GBound=1 not treated
      Standard_Boolean try1 = Standard_True;
      if (vertex) {
	const TopoDS_Vertex& vG = TopoDS::Vertex(BDS.Shape(G));
	TopoDS_Vertex OOv; Standard_Boolean hasOO = FUN_ds_getoov(vG,HDS,OOv);
	Standard_Integer ovSE = FUN_tool_orientVinE(vG,SE);
	if ((ovSE == 0) && hasOO) ovSE = FUN_tool_orientVinE(OOv,SE);
	if (ovSE != 0) try1 = Standard_False;
      }
      if (!try1) continue;
    
      // SE has    {I=(T(face),    G not Gbound, edge)}
      //    has NO {I'=(T'(face'), G not Gbound, face')}
      TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);
      TopOpeBRepDS_ListOfInterference l1;
#ifdef DEB
//      Standard_Integer nI =
#endif
               FUN_selectTRASHAinterference(loicopy,TopAbs_FACE,l1);
      TopOpeBRepDS_ListOfInterference lF; Standard_Integer nF = FUN_selectSKinterference(l1,TopOpeBRepDS_FACE,lF);
      if (nF > 1) continue;
      TopOpeBRepDS_ListOfInterference lFE; Standard_Integer nFE = FUN_selectSKinterference(l1,TopOpeBRepDS_EDGE,lFE);
      if (nFE == 0) continue;  

      // I = (T(FTRA),G not Gbound, ES)
      const Handle(TopOpeBRepDS_Interference)& I = lFE.First();
      Standard_Real par = FDS_Parameter(I);
#ifdef DEB
//      const TopOpeBRepDS_Transition& T = I->Transition();
#endif
      TopOpeBRepDS_Kind ST; Standard_Integer S = 0; FDS_data(I,K,G,ST,S);
      TopAbs_ShapeEnum tsb,tsa; Standard_Integer isb,isa; FDS_Tdata(I,tsb,isb,tsa,isa);
      const TopoDS_Face& FTRA= TopoDS::Face(BDS.Shape(isb));
      const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(S)); 

      // lfCX = {fCX / fCX shares ES with FTRA}
      const TopTools_ListOfShape& lfCX = FDSCNX_EdgeConnexitySameShape(ES,HDS);      
      for (TopTools_ListIteratorOfListOfShape itfcx(lfCX); itfcx.More(); itfcx.Next()){
	const TopoDS_Face& FCX = TopoDS::Face(itfcx.Value());
	Standard_Integer IFCX = BDS.Shape(FCX);
	if (FCX.IsSame(FTRA)) continue;

	// xpu140498 : NYI check SE has part ON FCX(with bound G) 
	TopOpeBRepDS_ListOfInterference l2; Standard_Integer n2 = FUN_selectITRASHAinterference(lFE,IFCX,l2);
	if (n2 > 0) continue;

	Standard_Real OOpar = 0.;
	if (point) {
	  gp_Pnt p3d = BDS.Point(G).Point(); 
	  Standard_Real t1 = BDS.Point(G).Tolerance(); Standard_Real t2 = FUN_tool_maxtol(ES);
	  Standard_Real t = (t1 > t2) ? t1 : t2;
	  Standard_Real d = 1.e1;Standard_Boolean ok = FUN_tool_projPonE(p3d,ES,OOpar,d);
	  if (!ok) {FUN_Raise(); continue;}
	  if (d > t) {FUN_Raise(); continue;}
	}
	if (vertex) { // rkG == rkES
	  const TopoDS_Vertex& vG = TopoDS::Vertex(BDS.Shape(G));
	  Standard_Integer rkG = BDS.AncestorRank(G);

	  // modified by NIZHNY-MKK  Mon Apr  2 15:38:11 2001.BEGIN
	  // 	  if (rkG == rkSE) OOpar = BRep_Tool::Parameter(vG,ES);
	  if (rkG == rkSE) {
	    Standard_Integer hasvG = FUN_tool_orientVinE(vG,ES);
	    if(hasvG==0) {
	      continue;
	    }
	    OOpar = BRep_Tool::Parameter(vG,ES);
	  }
	  // modified by NIZHNY-MKK  Mon Apr  2 15:38:30 2001.END
	  else {
	    TopoDS_Shape oov; Standard_Boolean hasoov = FUN_ds_getoov(vG,BDS,oov);
	    if (!hasoov) {
	      Standard_Real t1 = BRep_Tool::Tolerance(vG); Standard_Real t2 = FUN_tool_maxtol(ES);
	      Standard_Real t = (t1 > t2) ? t1 : t2;
	      gp_Pnt p = BRep_Tool::Pnt(vG);
	      Standard_Real parES,dd=1.e1;
	      Standard_Boolean ok = FUN_tool_projPonE(p,ES,parES,dd);
	      if (!ok) {FUN_Raise(); continue;}
	      if (dd > t) {FUN_Raise(); continue;}
	      OOpar = parES;
	    }
	    else         OOpar = BRep_Tool::Parameter(TopoDS::Vertex(oov),ES);
	  }
	}

	gp_Pnt2d OOuv; Standard_Boolean ok = FUN_tool_paronEF(ES,OOpar,FCX,OOuv); 
	if (!ok) {FUN_Raise(); continue;}	

	TopOpeBRepDS_Transition newT; 
	// -------
	Standard_Boolean isonper; Standard_Real par1,par2; Standard_Real factor = 1.e-4;
	FDS_LOIinfsup(BDS,SE,par,K,G,
			BDS.ShapeInterferences(SE),par1,par2,isonper);

	TopOpeBRepTool_makeTransition MKT; 
	TopAbs_State stb = TopAbs_UNKNOWN,sta = TopAbs_UNKNOWN; 
	ok = MKT.Initialize(SE,par1,par2,par, FCX,OOuv, factor);
	if (ok) ok = MKT.SetRest(ES,OOpar);
	if (ok) ok = MKT.MkTonE(stb,sta);
	if (!ok) {FUN_Raise(); continue;}  
	newT.Before(stb); newT.After(sta); newT.Index(IFCX);

	Handle(TopOpeBRepDS_Interference) newI;
	// --------	
	Standard_Boolean B = Standard_False;
	if (vertex) B = Handle(TopOpeBRepDS_EdgeVertexInterference)::DownCast(I)->GBound();
	newI = MakeEPVInterference(newT,IFCX,G,par,K,TopOpeBRepDS_FACE,B);
#ifdef DEB
	if (trc) {cout<<"completeforSE2 on section edge "<<ISE<<" ";newI->Dump(cout);cout<<endl;}
#endif
	HDS->StoreInterference(newI,SE);
      } // itfcx
    } // tki
  } // nse
} // completeforSE2


static Standard_Boolean FUN_ds_completeforSE3(const TopOpeBRepDS_DataStructure& BDS, const TopoDS_Edge& SE,
				 const TopOpeBRepDS_Kind K,
//                                 const Standard_Integer G,
                                 const Standard_Integer ,
                                 const TopOpeBRepDS_ListOfInterference& loi,
				 Standard_Real& parE, Standard_Integer& IES, Standard_Integer& ITRASHA, TopOpeBRepDS_Transition& Tr)
{        
  if (K == TopOpeBRepDS_VERTEX) return Standard_False;
  Standard_Integer ISE = BDS.Shape(SE);  

  TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);  
  TopOpeBRepDS_ListOfInterference lINT; Standard_Integer nINT = FUN_selectTRAORIinterference(loicopy,TopAbs_INTERNAL,lINT);
  TopOpeBRepDS_ListOfInterference lEXT; Standard_Integer nEXT = FUN_selectTRAORIinterference(loicopy,TopAbs_EXTERNAL,lEXT);
  Standard_Integer n1 = nINT + nEXT;
  if (n1 < 1) return Standard_False; 
  TopOpeBRepDS_ListOfInterference l1; l1.Append(lINT); l1.Append(lEXT);
  
  // b. I = (INT/EXT(F),G,S), F has I with G==ES
  TopOpeBRepDS_ListOfInterference l2; Standard_Integer n2 = FUN_selectTRASHAinterference(l1,TopAbs_FACE,l2);
  if (n2 < 1) return Standard_False;
  Standard_Boolean okb = Standard_False;
  for (TopOpeBRepDS_ListIteratorOfListOfInterference it2(l2); it2.More(); it2.Next()){
    const Handle(TopOpeBRepDS_Interference)& I2 = it2.Value();
    okb = FDS_SIisGIofIofSBAofTofI(BDS,ISE,I2);
    if (okb) break;
  }
  if (!okb) return Standard_False;
  
  // a. I3d = IFE+IF     
  TopOpeBRepDS_ListOfInterference l2e; Standard_Integer n2e = FUN_selectSKinterference(l2,TopOpeBRepDS_EDGE,l2e);
  TopOpeBRepDS_ListOfInterference l2f; Standard_Integer n2f = FUN_selectSKinterference(l2,TopOpeBRepDS_FACE,l2f);
  if ((n2e == 0) || (n2f == 0)) return Standard_False;  
  Standard_Integer sI3d = l2f.First()->Support();
  TopOpeBRepDS_ListOfInterference l3d; Standard_Integer n3d = FUN_selectITRASHAinterference(l2e,sI3d,l3d);
  if (n3d < 1) return Standard_False;
  
  // Tr
  //---
  const Handle(TopOpeBRepDS_Interference)& I3 = l3d.First();
  TopOpeBRepDS_Kind K3,ST3; Standard_Integer G3,S3 = 0; FDS_data(I3,K3,G3,ST3,S3);
  TopAbs_ShapeEnum tsb3,tsa3; Standard_Integer isb3,isa3; FDS_Tdata(I3,tsb3,isb3,tsa3,isa3);
  IES = S3; ITRASHA = isb3;
  
  const TopoDS_Edge& Eline = TopoDS::Edge(BDS.Shape(IES));
  const TopoDS_Face& F     = TopoDS::Face(BDS.Shape(ITRASHA));
  parE = FDS_Parameter(I3);

  Standard_Real parline; Standard_Boolean ok = FUN_tool_parE(SE,parE,Eline,parline);
  if (!ok) {FUN_Raise(); return Standard_False;}
  gp_Pnt2d uv;    ok = FUN_tool_paronEF(Eline,parline,F,uv);
  if (!ok) {FUN_Raise(); return Standard_False;}
  Standard_Real par1,par2; FUN_tool_bounds(SE,par1,par2);
  Standard_Real factor = 1.e-4;


  TopOpeBRepTool_makeTransition MKT; TopAbs_State stb = TopAbs_UNKNOWN,sta = TopAbs_UNKNOWN; 
  ok = MKT.Initialize(SE,par1,par2,parE, F,uv, factor);
  if (ok) ok = MKT.SetRest(Eline,parline);
  if (ok) ok = MKT.MkTonE(stb,sta);
  if (!ok) {FUN_Raise(); return Standard_False;}
  Tr.Before(stb); Tr.After(sta); Tr.Index(ITRASHA);
  return Standard_True;
}

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE3(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
{
  // xpu170498 : t3 (splits of e7)
  // prequesitory :
  //  edge SE - a. is tangent to FTRA on ES at G, has NO SPLIT ON FTRA (near G). 
  //          - b. has splitON FCX (FCX and FTRA share ES)  
  //  a. IFE=(T(FTRA),Gpoint,ES) && IF=(T(FTRA),Gpoint,FTRA)
  //     T describes T3d
  //  b. IFE=(T'(FCX),Gpoint,S) / FCX has I=(T'',SE,SS) 
  // 
  // purpose : when T(FTRA) is INTERNAL/EXTERNAL, the compute of spIN/spOU fails, 
  //           => compute interference I3d=IFE + IF with T==FORWARD/REVERSED.
        
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();
  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
    Standard_Integer ISE = BDS.Shape(SE);
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(SE);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse3(ISE);
#endif

    TopOpeBRepDS_ListOfInterference newLI; Standard_Boolean hasnewLI = Standard_False;
    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);      
    for (tki.Init(); tki.More(); tki.Next()) {     

      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);  
      Standard_Real parE; Standard_Integer IES=0, ITRASHA=0; TopOpeBRepDS_Transition Tr; 
      Standard_Boolean ok = FUN_ds_completeforSE3(BDS,SE,K,G,loi,parE,IES,ITRASHA,Tr);
      
      TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);      
      if (!ok) {newLI.Append(loicopy); continue;}
      
      // delete interferences =(T(face IF),G,S)
      TopOpeBRepDS_ListOfInterference lIdel;
      FUN_selectITRASHAinterference(loicopy,ITRASHA,lIdel);      
#ifdef DEB
      if (trc) {FDS_dumpLI(lIdel,"completeforSE3, delete :");}
#endif

      Handle(TopOpeBRepDS_Interference) TrFE, TrFF;
      //--------------
      hasnewLI = Standard_True;
      TrFE = MakeEPVInterference(Tr, ISE,G,parE,K,TopOpeBRepDS_EDGE,Standard_False);
      TrFF = MakeEPVInterference(Tr,ITRASHA,G,parE,K,TopOpeBRepDS_FACE,Standard_False);
#ifdef DEB
      if (trc) {cout<<"completeforSE3 on section edge "<<ISE<<" ";TrFE->Dump(cout);cout<<endl;}
      if (trc) {cout<<"completeforSE3 on section edge "<<ISE<<" ";TrFF->Dump(cout);cout<<endl;}
#endif

      newLI.Append(TrFF); newLI.Append(TrFE); newLI.Append(loicopy);
    } // tki

    if (hasnewLI) {
      TopOpeBRepDS_ListOfInterference& LII = BDS.ChangeShapeInterferences(SE); LII.Clear(); 
      LII.Append(newLI);
    }
    
  } //i=1..nse
} // completeforSE3

// ----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FUN_ds_shareG
(const Handle(TopOpeBRepDS_HDataStructure)& HDS, const Standard_Integer iF1,const Standard_Integer iF2,
 const Standard_Integer iE2, const TopoDS_Edge& Esp, Standard_Boolean& shareG)
// ----------------------------------------------------------------------
// F1 sdm F2, share Esp (split of E2)
{
  const TopOpeBRepDS_DataStructure& BDS = HDS->DS();
  Standard_Boolean hsdm = HDS->HasSameDomain(BDS.Shape(iE2));
  if (!hsdm) return Standard_False; 

  const TopoDS_Face& F1 = TopoDS::Face(BDS.Shape(iF1));
  const TopoDS_Face& F2 = TopoDS::Face(BDS.Shape(iF2));
  const TopoDS_Edge& E2 = TopoDS::Edge(BDS.Shape(iE2));

  Standard_Real tol = Precision::Confusion()*1.e3;
  Standard_Real f,l; FUN_tool_bounds(Esp,f,l);
  Standard_Real x = 0.45678; Standard_Real par = (1-x)*f + x*l;
  gp_Pnt P; Standard_Boolean ok = FUN_tool_value(par,Esp,P);
  if (!ok) return Standard_False;
  
  Standard_Real d2,par2; ok = FUN_tool_projPonE(P,E2,par2,d2);
  if (!ok) return Standard_False;
  if (d2 > tol)  return Standard_False;    

  gp_Vec nggeomF2; ok = FUN_tool_nggeomF(par2,E2,F2,nggeomF2);
  if (!ok) return Standard_False;
  gp_Dir nxx2; ok = FUN_tool_getxx(F2,E2,par2,nggeomF2,nxx2);
  if (!ok) return Standard_False;
    

  TopTools_IndexedMapOfShape mE1; TopExp::MapShapes(F1,TopAbs_EDGE,mE1);
  const TopTools_ListOfShape& sdmE1 = BDS.ShapeSameDomain(iE2);
  for (TopTools_ListIteratorOfListOfShape it(sdmE1); it.More(); it.Next()){
    const TopoDS_Edge& E1 = TopoDS::Edge(it.Value());
    Standard_Boolean isb = mE1.Contains(E1);
    if (!isb) continue;

    Standard_Real d1,par1; ok = FUN_tool_projPonE(P,E1,par1,d1);
    if (!ok) continue;
    if (d1 > tol) continue;

    // E1 on F1, E2 on F2, E1 and E2 share split Esp(nyi : check it)    
    gp_Vec nggeomF1; ok = FUN_tool_nggeomF(par1,E1,F1,nggeomF1);
    if (!ok) return Standard_False;
    gp_Dir nxx1; ok = FUN_tool_getxx(F1,E1,par1,nggeomF1,nxx1);
    if (!ok) return Standard_False;

#ifdef DEB
//    Standard_Real tol = 1.e3*
#endif
              Precision::Angular();
    Standard_Real prod = nxx1.Dot(nxx2);
    shareG =  (prod > 0.);
    return Standard_True;
  }
  return Standard_False;
}
// ----------------------------------------------------------------------
Standard_EXPORT Standard_Boolean FUN_ds_mkTonFsdm
(const Handle(TopOpeBRepDS_HDataStructure)& HDS, const Standard_Integer iF1, const Standard_Integer iF2, const Standard_Integer iE2, 
 const Standard_Integer iEG, const Standard_Real paronEG, const TopoDS_Edge& Esp, const Standard_Boolean pardef, 
 TopOpeBRepDS_Transition& T)
// ----------------------------------------------------------------------
// =================================
// prequesitory : F1 and F2 are SDSO
// =================================
// F1 sdm F2,  EG has split ON F1 shared by F2
//
// EG and E2 share geometric point G (of param paronEG)
// pardef = Standard_True : paronEG is defined
// else         : use Esp to find paronEG, Esp is split of EG
// (!! we can have EG==E2)
//
// purpose : computes 2d transition of F1 when crossing EG relative to 
//           2dmatter(F2) limited by E2 :
//        -> 2d FEI attached to F1 = (T(F2), G=EG, S=F2)
{
  const TopOpeBRepDS_DataStructure& BDS = HDS->DS();
  Standard_Boolean hsdm = HDS->HasSameDomain(BDS.Shape(iE2));
  if (!hsdm) return Standard_False; 

  const TopoDS_Face& F1 = TopoDS::Face(BDS.Shape(iF1));
  const TopoDS_Face& F2 = TopoDS::Face(BDS.Shape(iF2));
  const TopoDS_Edge& E2 = TopoDS::Edge(BDS.Shape(iE2));
  const TopoDS_Edge& EG = TopoDS::Edge(BDS.Shape(iEG));

  Standard_Boolean EGisE2 = (iEG == iE2);
  Standard_Real tol = Precision::Confusion()*1.e3;

  // beafter :
  // ---------
  Standard_Boolean ok = Standard_False;
  gp_Pnt P; Standard_Real parEG;
  if (pardef) parEG = paronEG;
  else {
    Standard_Real f,l; FUN_tool_bounds(Esp,f,l);
#ifdef DEB
  //  Standard_Real x = 0.45678;
  //  Standard_Real par = (1-x)*f + x*l;
#endif
    Standard_Real dEG; ok = FUN_tool_projPonE(P,EG,parEG,dEG);
    if (!ok) return Standard_False;
    if (dEG > tol)  return Standard_False; 
  }
  ok = FUN_tool_value(parEG,EG,P);
  if (!ok) return Standard_False;
  gp_Vec tgtEG ; ok = TopOpeBRepTool_TOOL::TggeomE(parEG,EG,tgtEG);
  if (!ok) return Standard_False;
  gp_Vec ngF1; ok = FUN_tool_nggeomF(parEG,EG,F1,ngF1);
  if (!ok) return Standard_False;
  gp_Vec beafter = ngF1^tgtEG;
  
  // nxx2 :
  // ------
  Standard_Real par2;
  if (EGisE2) par2 = parEG;
  else {
    Standard_Real d2; ok = FUN_tool_projPonE(P,E2,par2,d2);
    if (!ok) return Standard_False;
    if (d2 > tol)  return Standard_False;    
  }
  gp_Vec ngF2; ok = FUN_tool_nggeomF(par2,E2,F2,ngF2);
  if (!ok) return Standard_False;
  gp_Dir nxx2; ok = FUN_tool_getxx(F2,E2,par2,ngF2,nxx2);
  if (!ok) return Standard_False;

  // T :
  // ---
  Standard_Boolean sdmEGE2 = EGisE2;
  if (!sdmEGE2) sdmEGE2 = FUN_ds_sdm(BDS,EG,E2);
  if (!sdmEGE2) return Standard_False;
  
  Standard_Real prod = beafter.Dot(nxx2);
  Standard_Real tola = Precision::Angular()*1.e3;
  ok = (Abs(1- Abs(prod)) < tola);
  if (!ok) return Standard_False;

  if (prod > 0.) T = TopOpeBRepDS_Transition(TopAbs_OUT,TopAbs_IN);
  else           T = TopOpeBRepDS_Transition(TopAbs_IN,TopAbs_OUT);
  return Standard_True;
}

#define UNKNOWN    (0)
#define ONSAMESHA  (1)
#define CLOSESAME  (11)
#define ONOPPOSHA  (2)
#define CLOSEOPPO  (22)
#define FORREVOPPO (222)

Standard_EXPORT Standard_Integer FUN_ds_oriEinF(const TopOpeBRepDS_DataStructure& BDS, const TopoDS_Edge& E, const TopoDS_Shape& F,
				   TopAbs_Orientation& O)
// purpose :
//  * E is edge of F :returns orientation of E in F 
//  * E is edge of Fsd : Fsd sdm with F, 
//  returns orientation of E in F /E describes the same 2d area in F as in Fsd
//  * !! if E is closing edge, returns CLOSESAME or CLOSEOPPO
{
  O = TopAbs_EXTERNAL;
  Standard_Integer rkF = BDS.AncestorRank(F);
  Standard_Integer rkE = BDS.AncestorRank(E);

  const TopoDS_Edge& EE = TopoDS::Edge(E);
  const TopoDS_Face& FF = TopoDS::Face(F);
  Standard_Integer iF = BDS.Shape(F);
  TopAbs_Orientation oF = BDS.Shape(iF).Orientation();
  
  if (rkF == rkE) {
    Standard_Boolean samsha = FUN_tool_orientEinFFORWARD(EE,FF,O);
    if (samsha) {
      Standard_Boolean iscE = BRep_Tool::IsClosed(EE,FF);
      if (iscE) return CLOSESAME;
      else      return ONSAMESHA;
    }
    else        return UNKNOWN;
  }
  else {    
    const TopTools_ListOfShape& sdmFs = BDS.ShapeSameDomain(FF);
    Standard_Boolean hsdm = (sdmFs.Extent() > 0);

    if (hsdm) {
      Standard_Boolean hasFOR=Standard_False, hasREV=Standard_False; // xpu120898 (PRO14785 : e36 shared by f34 & f39,
                                  // faces sdm with f16)
      TopOpeBRepDS_Config C = BDS.SameDomainOri(FF);

      for (TopTools_ListIteratorOfListOfShape it(sdmFs); it.More(); it.Next()){
	const TopoDS_Face& Fsdm = TopoDS::Face(it.Value());
	Standard_Integer iFsdm = BDS.Shape(Fsdm);
	Standard_Integer rksdm = BDS.AncestorRank(Fsdm);
	if (rksdm == rkF) continue;
	
	Standard_Boolean samsha = FUN_tool_orientEinFFORWARD(EE,Fsdm,O);
	if (!samsha) continue;

	Standard_Boolean iscE = BRep_Tool::IsClosed(EE,Fsdm);
	if (iscE) return CLOSEOPPO;
	else {
	  TopOpeBRepDS_Config Csdm = BDS.SameDomainOri(Fsdm);
	  Standard_Boolean toreverse1 = (Csdm != C) && (!M_INTERNAL(O)) && (!M_EXTERNAL(O));
	  if (toreverse1) O = TopAbs::Complement(O);
	  
	  TopAbs_Orientation oFsdm = BDS.Shape(iFsdm).Orientation();
	  Standard_Boolean toreverse2 = (oF != oFsdm) && (!M_INTERNAL(oFsdm)) && (!M_EXTERNAL(oFsdm));
	  if (toreverse2) O = TopAbs::Complement(O);
	  if (!hasFOR) hasFOR = M_FORWARD(O);
	  if (!hasREV) hasREV = M_REVERSED(O);
	}
      } // it(sdmFs)
      if (hasFOR && hasREV) return FORREVOPPO;
      if (hasFOR || hasREV) {
	O = hasFOR ? TopAbs_FORWARD : TopAbs_REVERSED;
	return ONOPPOSHA;
      }
    }
    else return UNKNOWN;
  }
  return UNKNOWN;
}

#define NONE        (0)
#define EREFandESUP (2)
#define FIRST (1)
#define LAST  (2)
static Standard_Integer FUN_EisSE2(const TopOpeBRepDS_DataStructure& BDS,
//                                   const TopTools_MapOfShape& Fsdm,
                                   const TopTools_MapOfShape& ,
                                   const TopoDS_Edge& E,
                                   const Handle(TopOpeBRepDS_Interference)& I)
{
  const TopOpeBRepDS_Transition& T = I->Transition();
  const TopAbs_Orientation O = T.Orientation(TopAbs_IN);
  TopAbs_ShapeEnum SB,SA;Standard_Integer IB,IA;TopOpeBRepDS_Kind GT = TopOpeBRepDS_UNKNOWN,ST;Standard_Integer G = 0,S;
  FDS_Idata(I,SB,IB,SA,IA,GT,G,ST,S);
  if (GT != TopOpeBRepDS_VERTEX) return NONE;
  if (M_EXTERNAL(O)) return NONE;

  // E sdm ES
  if (SB != TopAbs_EDGE) return NONE;
//  BDS.Shape(S);

  Standard_Integer rkE = BDS.AncestorRank(E);
  Standard_Integer rkG = BDS.AncestorRank(G);   
  const TopoDS_Vertex& VG   = TopoDS::Vertex(BDS.Shape(G));
  Standard_Integer Gsd; Standard_Boolean Ghsd = FUN_ds_getVsdm(BDS,G,Gsd);
  Standard_Integer oGinE = 0;
  if (Ghsd) {
    const TopoDS_Vertex& VGsd = TopoDS::Vertex(BDS.Shape(Gsd));
    if (rkE == rkG)  oGinE = FUN_tool_orientVinE(VG,E);
    else             oGinE = FUN_tool_orientVinE(VGsd,E);    
  }
  else oGinE = FUN_tool_orientVinE(VG,E);

  if (oGinE == 0) return EREFandESUP; // G in IN E

  Standard_Boolean noshare = ((oGinE == LAST) && M_FORWARD(O));
  noshare = noshare || ((oGinE == FIRST) && M_REVERSED(O));
  if (noshare) return NONE;

  if (SB == TopAbs_EDGE) {// E sdm edge(ST)
    if (!Ghsd) return EREFandESUP; 
    return EREFandESUP;    
  }
  
  return NONE;
}
Standard_EXPORT void FUN_ds_FillSDMFaces(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  
  for (Standard_Integer i= 1; i <= ns; i++) {
    const TopoDS_Shape& S = BDS.Shape(i);
    if (S.ShapeType() != TopAbs_FACE) continue;

    Standard_Integer rkS = BDS.AncestorRank(S);
    TopTools_MapOfShape Fsdm;
    TopTools_ListIteratorOfListOfShape itf(BDS.ShapeSameDomain(S));
    for (; itf.More(); itf.Next()){
      const TopoDS_Shape& f = itf.Value();
      Standard_Integer rkf = BDS.AncestorRank(f);
      if (rkf != rkS) Fsdm.Add(f);
    }
    Standard_Boolean hsd = (Fsdm.Extent() > 0);
    if (!hsd) continue;
    
    TopExp_Explorer ex(S, TopAbs_EDGE);
    for (; ex.More(); ex.Next()){
      const TopoDS_Edge& E = TopoDS::Edge(ex.Current());
      Standard_Boolean hase = BDS.HasShape(E); 
      if (!hase) continue;
      Standard_Boolean isse = BDS.IsSectionEdge(E); 
      if (isse) continue;      
      const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(E);
      Standard_Integer nI = LI.Extent();
      if (nI < 1) continue;
      
      TopOpeBRepDS_ListIteratorOfListOfInterference it;
      for (it.Initialize(LI); it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& I = it.Value();
	Standard_Integer isSE2 = FUN_EisSE2(BDS,Fsdm,E,I);
	if (isSE2 == NONE) continue;
	BDS.AddSectionEdge(E);
	if (isSE2 == EREFandESUP) {
	  Standard_Integer ST = I->Support();
	  const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(ST));
	  BDS.AddSectionEdge(ES);
	}
	break;
      }
    } // ex(S, TopAbs_EDGE);
  } // i = i..ns
}

Standard_EXPORT void FUN_ds_addSEsdm1d(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  for (Standard_Integer i= 1; i <= ns; i++) {
#ifdef DEB   
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(i);
    if (trc) debsdm1(i);    
#endif
    const TopoDS_Shape& S = BDS.Shape(i);
    if (S.ShapeType() != TopAbs_EDGE) continue;
    const TopoDS_Edge& E = TopoDS::Edge(S);
    Standard_Boolean dgE = BRep_Tool::Degenerated(E);
    if (dgE) continue;

    Standard_Boolean isse = BDS.IsSectionEdge(E); 
    if (isse) continue;  
    Standard_Integer rkE = BDS.AncestorRank(E);
    if (rkE != 1) continue;

    Standard_Boolean shareG = Standard_False;
    TopTools_ListOfShape lsd;
    TopOpeBRepDS_TOOL::EShareG(HDS,E,lsd);
    TopTools_ListIteratorOfListOfShape itsd(lsd); 
    if (itsd.More()) shareG = Standard_True;
    for (; itsd.More(); itsd.Next()) BDS.AddSectionEdge(TopoDS::Edge(itsd.Value()));
    if (shareG) BDS.AddSectionEdge(E);
  }//i=1..ns
}// FUN_ds_addSEsdm1d

Standard_EXPORT Standard_Integer FUN_ds_hasI2d(
//                              const Standard_Integer EIX,
                              const Standard_Integer ,
                              const TopOpeBRepDS_ListOfInterference& LLI,
                              TopOpeBRepDS_ListOfInterference& LI2d)
{
  // LI : attached to EIX at given G
  // recall : I3d if I1=(T(FTRA),G,FTRA) && I2=(T(FTRA),G,E)
  //          I2d if only I=(T(FTRA),G,E) (=>EIX is on FF sdm with FTRA)

  TopOpeBRepDS_ListOfInterference LI; FDS_assign(LLI,LI);
  TopOpeBRepDS_ListOfInterference L1dE; FUN_selectTRASHAinterference(LI,TopAbs_EDGE,L1dE); 
  TopOpeBRepDS_ListOfInterference LIF;FUN_selectSKinterference(LI,TopOpeBRepDS_FACE,LIF);
  TopOpeBRepDS_ListOfInterference LIE;FUN_selectSKinterference(LI,TopOpeBRepDS_EDGE,LIE);
  LI.Append(L1dE);
  TopOpeBRepDS_ListIteratorOfListOfInterference itE(LIE);
  for (; itE.More(); itE.Next()){
    const Handle(TopOpeBRepDS_Interference)& IE = itE.Value();
    TopOpeBRepDS_Kind GTE,STE; Standard_Integer GE = 0,SE; FDS_data(IE,GTE,GE,STE,SE);
    TopAbs_ShapeEnum tsb,tsa; Standard_Integer isb,isa; FDS_Tdata(IE,tsb,isb,tsa,isa);
    
    TopOpeBRepDS_ListIteratorOfListOfInterference itF(LIF);
    Standard_Boolean is3d = Standard_False;
    for (; itF.More(); itF.Next()){
      const Handle(TopOpeBRepDS_Interference)& IF = itF.Value();
      TopOpeBRepDS_Kind GTF,STF; Standard_Integer GF = 0,SF = 0; FDS_data(IF,GTF,GF,STF,SF);
      if (GE != GF) continue;
      if (SF==isb) {
	is3d = Standard_True;
	break;
      }      
    } // itF
    if (!is3d) LI2d.Append(IE);
  } // itE
  Standard_Integer nLI2d = LI2d.Extent();
  return nLI2d;
}

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE4(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu160698 : section edge SE intersects ES at G=point
//             ES closing edge on FTRA
//             we need to have transitions :
//             T1=(OU/IN(FTRA),GP,ES)
//             T2=(IN/OU(FTRA),GP,ES), for the compute of splitON     
// PRO6965, (SE=e13,F=f6,ES=e12)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();
  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
#ifdef DEB    
    Standard_Integer ISE =
#endif
              BDS.Shape(SE);
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(SE);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse4(ISE);
#endif

    TopOpeBRepDS_ListOfInterference newLI;
    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);      
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G); 
      if (K != TopOpeBRepDS_POINT) continue;

      TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);
      TopOpeBRepDS_ListOfInterference l1;
      FUN_selectSKinterference(loicopy,TopOpeBRepDS_EDGE,l1);
      TopOpeBRepDS_ListOfInterference l2; Standard_Integer n2 = FUN_selectTRASHAinterference(l1,TopAbs_FACE,l2);
      if (n2 < 1) continue;

      const Handle(TopOpeBRepDS_Interference)& I = l2.First();
      TopOpeBRepDS_Kind GT,ST; Standard_Integer S = 0; FDS_data(I,GT,G,ST,S);
      TopAbs_ShapeEnum tsb,tsa; Standard_Integer isb,isa; FDS_Tdata(I,tsb,isb,tsa,isa);
      const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(S));
      const TopoDS_Face& FTRA = TopoDS::Face(BDS.Shape(isb));

      Standard_Boolean closing = FUN_tool_IsClosingE(ES,FTRA,FTRA);
      if (!closing) continue;

      Standard_Boolean hasFOR=Standard_False,hasREV=Standard_False;
      for (TopOpeBRepDS_ListIteratorOfListOfInterference it(l2); it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& I2 = it.Value();
	TopOpeBRepDS_Kind GT2,ST2; Standard_Integer G2,S2 = 0; FDS_data(I2,GT2,G2,ST2,S2);
	TopAbs_ShapeEnum tsb2,tsa2; Standard_Integer isb2,isa2; FDS_Tdata(I2,tsb2,isb2,tsa2,isa2);
	Standard_Boolean error = (S2 != S) || (isb2 != isb);
	if (error) return; // nyi raise
	TopAbs_Orientation O2 = I2->Transition().Orientation(TopAbs_IN);
	if (!hasFOR) hasFOR = M_FORWARD(O2);
	if (!hasREV) hasREV = M_REVERSED(O2);
      }
      if (!hasFOR && !hasREV) continue;
      if ( hasFOR && hasREV ) continue;
      TopAbs_Orientation newO = hasFOR ? TopAbs_REVERSED : TopAbs_FORWARD;
      TopOpeBRepDS_Transition newT(newO); newT.Index(isb);
      Standard_Real par = FDS_Parameter(I);
      Handle(TopOpeBRepDS_Interference) newI = MakeEPVInterference(newT,S,G,par,K,Standard_False);
#ifdef DEB
	if (trc) {cout<<"completeforSE4 on section edge "<<ISE<<" ";newI->Dump(cout);cout<<endl;}
#endif
      HDS->StoreInterference(newI,SE); 
    } // tki
  } // i=1..nse
}//completeforSE4

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE5(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu190698 : section edge SE has spON face F,
//             FCX is tangent to F at G (FCX and F are on same shape)
//             SE has I  = (T(F),G,S),         T=(OUT,OUT) 
//                    I' = (T'(Fsd),G,Sedge), T' FORWARD or REVERSED
//             T describes states (ON/OUT) or (OUT/ON)
// PRO12695 (SE20,P1,FCX16,F29)
// xpu131098 : SE has I  = (T(F),G,S),         T=(IN,IN)
//                    I' = (T'(Fsd),G,Sedge), T' FORWARD or REVERSED
//             T describes states (ON/IN) or (OUT/IN)
//
//    recall : for the compute of spOU/IN(ES), we need to interferences 
//             TskFACE = (T(FF),G,FF) T=FORWARD/REVERSED
// cto 902 D9 (SE17,P4,F29,FCX4)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();
  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
#ifdef DEB    
    Standard_Integer ISE =
#endif
              BDS.Shape(SE);
    const TopOpeBRepDS_ListOfInterference& LOI = BDS.ShapeInterferences(SE);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse5(ISE);
#endif

    // xpu020399 : cto901A2 (e26)
    TopOpeBRepDS_ListOfInterference LOIc; FDS_copy(LOI,LOIc);
    TopOpeBRepDS_ListOfInterference LI; Standard_Integer nI = FUN_selectSKinterference(LOIc,TopOpeBRepDS_EDGE,LI);
    if (nI < 1) continue;

    TopOpeBRepDS_ListOfInterference newLI; Standard_Boolean hasnewLI = Standard_False;
    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);      
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G); 
      if (K != TopOpeBRepDS_POINT) {FDS_copy(loi,newLI); continue;}

      TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);
      TopOpeBRepDS_ListOfInterference lext; Standard_Integer iext = FUN_selectTRAORIinterference(loicopy,TopAbs_EXTERNAL,lext);
      Standard_Boolean hasext = (iext > 0);
      TopOpeBRepDS_ListOfInterference lint; Standard_Integer iint = FUN_selectTRAORIinterference(loicopy,TopAbs_INTERNAL,lint);
      Standard_Boolean hasint = (iint > 0);
      if (!hasext && !hasint) {FDS_copy(loi,newLI); continue;}
      if (hasext && hasint) {FDS_copy(loi,newLI); continue;} // nyiFUN_RAISE : incoherent data
                                                             // ------------------------------

      // NYI : only select among 2dI!!! ******************************
      TopOpeBRepDS_ListOfInterference lfor; Standard_Integer ifor = FUN_selectTRAORIinterference(loicopy,TopAbs_FORWARD,lfor);
      TopOpeBRepDS_ListOfInterference lrev; Standard_Integer irev = FUN_selectTRAORIinterference(loicopy,TopAbs_REVERSED,lrev);
      Standard_Boolean hasrev=(irev > 0), hasfor=(ifor > 0);
      if (!hasrev && !hasfor) {FDS_copy(loi,newLI); continue;}
      if (hasrev && hasfor)   {FDS_copy(loi,newLI); continue;} // nyiFUN_RAISE : incoherent data

      // newO : 
      // -----
      Handle(TopOpeBRepDS_Interference) I2d = hasfor ? lfor.First() : lrev.First();
      Standard_Integer S2 = I2d->Support(); Standard_Integer iF2 = I2d->Transition().Index();      
      const TopoDS_Edge& E2 = TopoDS::Edge(BDS.Shape(S2)); Standard_Real parSE = FDS_Parameter(I2d);
      const TopoDS_Face& F2 = TopoDS::Face(BDS.Shape(iF2));
      Standard_Real parE2; Standard_Boolean ok = FUN_tool_parE(SE,parSE,E2,parE2); 
      if (!ok) return;
      gp_Pnt2d uv2; ok = FUN_tool_paronEF(E2,parE2,F2,uv2); 
      if (!ok) return;
      gp_Dir ngF2 = FUN_tool_nggeomF(uv2,F2);
      gp_Dir xxF2; ok = FUN_tool_getxx(F2,E2,parE2,ngF2,xxF2); 
      if (!ok) return;
	
      Handle(TopOpeBRepDS_Interference) I3d = hasext ? lext.First() : lint.First();
      Standard_Integer iF3 = I3d->Transition().Index();
      const TopoDS_Face& F3 = TopoDS::Face(BDS.Shape(iF3));
      // recall : G is a point => E2 = edge(S3) (I3d : {(T,G,S3),(T,G,F3)})
      gp_Pnt2d uv3; ok = FUN_tool_paronEF(E2,parE2,F3,uv3); 
      if (!ok) return;
      gp_Dir ngF3 = FUN_tool_nggeomF(uv3,F3);
      gp_Dir xxF3; ok = FUN_tool_getxx(F3,E2,parE2,ngF3,xxF3); 
      if (!ok) return;
      
      Standard_Real dot = xxF2.Dot(xxF3);
      Standard_Boolean positive = (dot > 0); // as F and FCX are tangent, dot= +1 or -1
      if (positive) continue;

      TopAbs_Orientation newO = hasfor ? TopAbs_FORWARD : TopAbs_REVERSED;
      if (hasint) newO = TopAbs::Complement(newO);

      TopOpeBRepDS_ListIteratorOfListOfInterference it; 
      if (hasint) it.Initialize(lint);
      else        it.Initialize(lext);
      for (; it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& I = it.Value();
	Handle(TopOpeBRepDS_Interference) newI = I; newI->ChangeTransition().Set(newO);
#ifdef DEB
	if (trc) {cout<<"completeforSE5 se"<<ISE<<"->";newI->Dump(cout);cout<<endl;}
#endif
	newLI.Append(I);
	hasnewLI = Standard_True;
      } // it
      newLI.Append(lrev); 
      newLI.Append(lfor);
      newLI.Append(loicopy);
    } // tki
    if (hasnewLI) { 
      newLI.Append(LOIc);
      TopOpeBRepDS_ListOfInterference& LII = BDS.ChangeShapeInterferences(SE); LII.Clear(); 
      LII.Append(newLI);
    }
  } // i=1..nse
}//completeforSE5

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE6(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu280798 : - section edge E sdm3d Esd, 
//             - E has I2d(T(F),VG,E'), 
//             - VG vertex of Esd, VG not sdm
//             - Esd edge of F
//             => add newI1d(newT(Esd),VG,Esd)
//  cto902B4 (e15,v22)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();
  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
    Standard_Integer ISE = BDS.Shape(SE);  
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse6(ISE);
#endif

    TopTools_ListOfShape lEsd3d; Standard_Boolean hassd3d = FDS_HasSameDomain3d(BDS,SE,&lEsd3d);
    if (!hassd3d) continue;

    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(SE); 
    TopOpeBRepDS_ListOfInterference LIcopy; 
    TopOpeBRepDS_ListOfInterference LIa; FDS_assign(LI,LIcopy); Standard_Integer na = FUN_selectGKinterference(LIcopy,TopOpeBRepDS_VERTEX,LIa);
    if (na == 0) continue;
    TopOpeBRepDS_ListOfInterference LIb;
    for (TopOpeBRepDS_ListIteratorOfListOfInterference it(LIa); it.More(); it.Next()){
      const Handle(TopOpeBRepDS_Interference)& Ia = it.Value();
      Standard_Integer G = Ia->Geometry();
      TopoDS_Shape vGsd; Standard_Boolean hassd = FUN_ds_getoov(BDS.Shape(G), HDS, vGsd);
      if (!hassd) LIb.Append(Ia);
    }
   
    TopOpeBRepDS_ListOfInterference l2dFE; FDS_assign(LIb,LIcopy);
#ifdef DEB
//    Standard_Integer n2d =
#endif
              FUN_ds_hasI2d(ISE,LIcopy,l2dFE);
    TopOpeBRepDS_ListOfInterference l1dE;  FDS_assign(LIb,LIcopy);
#ifdef DEB
//    Standard_Integer n1d =
#endif
              FUN_selectTRASHAinterference(LIcopy,TopAbs_EDGE,l1dE); 

    // attached to SE : l1dE  = {I1d=(T(Esd),vG,Esd) / vG !hsd}
    //                  l2dFE = {I2dF=(T(F),vG,E) / vG !hsd}
    
    for (TopTools_ListIteratorOfListOfShape itsd3(lEsd3d); itsd3.More(); itsd3.Next()){
      const TopoDS_Edge& Esd = TopoDS::Edge(itsd3.Value());
      TopoDS_Vertex vf,vl; TopExp::Vertices(Esd,vf,vl);
      Standard_Boolean degen = BRep_Tool::Degenerated(Esd); 
      if (degen) continue;

      Standard_Boolean closed = vf.IsSame(vl);
      Standard_Integer iEsd = BDS.Shape(Esd);
      Standard_Integer ivf = BDS.Shape(vf); 
      Standard_Integer ivl = BDS.Shape(vl);
      
      for (Standard_Integer iv = 1; iv <= 2; iv++) {
	Standard_Integer G = (iv == 1)? ivf : ivl;
	if (G == 0) continue;
	const TopoDS_Vertex& vG = TopoDS::Vertex(BDS.Shape(G));
	TopoDS_Shape vGsd; Standard_Boolean hassd = FUN_ds_getoov(vG, HDS, vGsd);
	if (hassd) continue;

	TopOpeBRepDS_ListOfInterference l1dG;
        FUN_selectGIinterference(l1dE,G,l1dG);
	TopOpeBRepDS_ListOfInterference l2dG; Standard_Integer n2dG = FUN_selectGIinterference(l2dFE,G,l2dG);
	if (n2dG == 0) continue; // no 2dI at G
	
	TopOpeBRepDS_ListOfInterference l1dGEsd; Standard_Integer n1dGEsd = FUN_selectITRASHAinterference(l1dG,iEsd,l1dGEsd);
	if (n1dGEsd != 0) continue; // 1dI(Esd) at G exists already

	for (TopOpeBRepDS_ListIteratorOfListOfInterference it2d(l2dG); it2d.More(); it2d.Next()){ 
	  const Handle(TopOpeBRepDS_Interference)& I2d = it2d.Value();
	  Standard_Integer iTRASHA = I2d->Transition().IndexBefore();
	  TopAbs_Orientation O = I2d->Transition().Orientation(TopAbs_IN);
	  const TopoDS_Face& F = TopoDS::Face(BDS.Shape(iTRASHA));
	  TopAbs_Orientation dum; Standard_Boolean EsdofF = FUN_tool_orientEinF(Esd,F,dum);
	  if (!EsdofF) continue;
	  
	  // we found I2d = (T(F),vG,E'), vG is vertex of Esd, vG !hsdm, Esd is edge of F
	  // compute newI1d=(newT(Esd),vG,Esd)
	  TopOpeBRepDS_Transition newT(TopAbs_OUT,TopAbs_OUT, TopAbs_EDGE,TopAbs_EDGE);
	  Standard_Real parE = FDS_Parameter(I2d);
	  if (closed) newT.Set(TopAbs_INTERNAL);
	  else {
	    if      (M_FORWARD(O) || M_REVERSED(O)) {newT.Set(O);}
	    else if (M_EXTERNAL(O))                 {newT.Set(O);}
	    else if (M_INTERNAL(O))                 {
	      Standard_Real parEsd   = BRep_Tool::Parameter(vG,Esd);
	      gp_Vec tgEsd; TopOpeBRepTool_TOOL::TggeomE(parEsd,Esd,tgEsd); // dir
	      gp_Vec tgE  ; TopOpeBRepTool_TOOL::TggeomE(parE,SE,tgE);      // dir
	      Standard_Real dot = tgEsd.Dot(tgE);
#ifdef DEB
	      Standard_Real tola =
#endif
                         Precision::Angular();
#ifdef DEB
	      if (Abs(dot) < tola) Standard_Failure::Raise("completeforSE6");
#endif
	      Standard_Boolean SO = (dot > 0.);
	      Standard_Boolean isvf = (iv == 1);
	      Standard_Boolean isforw = (SO && isvf) || (!SO && !isvf);
	      if (isforw) {newT.Set(TopAbs_FORWARD);}
	      else        {newT.Set(TopAbs_REVERSED);}
	    }
	  }
	  newT.Index(iEsd);
	  Handle(TopOpeBRepDS_Interference) newI1d = MakeEPVInterference(newT,iEsd,G,parE,TopOpeBRepDS_VERTEX,Standard_False);
#ifdef DEB
	if (trc) {cout<<"completeforS61 on section edge "<<ISE<<" ";newI1d->Dump(cout);cout<<endl;}
#endif
	  HDS->StoreInterference(newI1d,SE);
	} // it2d(l2dFE)

      }
    } //itsd3

  } //i=1..nse
}// completeforSE6

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforE7(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu130898 : attached to edge E, lI3d = {I=(FOR/REV(F),G,F)}
//             reduction of lI3d if it describes INTERNAL/EXTERNAL transitions
// purpose : I3dFOR/REV => faulty spIN/OU of E on G                  
// CTS21199 (E6, G=v7/p3, FTR=f5)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  for (Standard_Integer i = 1; i <= ns; i++) {
    const TopoDS_Shape& EE = BDS.Shape(i);
    if (EE.ShapeType() != TopAbs_EDGE) continue;
 
    const TopoDS_Edge& E = TopoDS::Edge(EE);
    Standard_Boolean isdgE = BRep_Tool::Degenerated(E); 
    if (isdgE) continue;

#ifdef DEB
    Standard_Integer IE = 
#endif
             BDS.Shape(E);
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(IE);
    if (trc) debe7(IE);
#endif
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(E); 

    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);  
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);      
      TopOpeBRepDS_ListOfInterference loicopy; FDS_assign(loi,loicopy);
      TopOpeBRepDS_ListOfInterference l1;
#ifdef DEB
//      Standard_Integer n1 = 
#endif
               FUN_selectSKinterference(loicopy,TopOpeBRepDS_FACE,l1);
      TopOpeBRepDS_ListOfInterference lFOR; Standard_Integer nFOR = FUN_selectTRAORIinterference(l1,TopAbs_FORWARD,lFOR);
      TopOpeBRepDS_ListOfInterference lREV; Standard_Integer nREV = FUN_selectTRAORIinterference(l1,TopAbs_REVERSED,lREV);
      if ((nFOR == 0) || (nREV == 0)) continue;

      TopOpeBRepDS_ListOfInterference lnewI; Standard_Integer iFS=0;
      TopOpeBRepDS_ListIteratorOfListOfInterference it(lFOR);
      for (; it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& IFOR = it.Value();
	Standard_Integer IFS = IFOR->Support(); const TopoDS_Face& FS = TopoDS::Face(BDS.Shape(IFS));
	TopOpeBRepDS_ListOfInterference lFS; Standard_Integer nFS = FUN_selectSIinterference(loicopy,IFS,lREV);
	if (nFS == 0) continue;
	
	TopOpeBRepDS_ListOfInterference lFSE; Standard_Integer nFSE = FUN_selectITRASHAinterference(loicopy,IFS,lFSE);
	Standard_Real par = FDS_Parameter(IFOR);
	Standard_Boolean isonper; Standard_Real par1,par2; Standard_Real factor = 1.e-4;
	FDS_LOIinfsup(BDS,E,par,K,G,BDS.ShapeInterferences(E),par1,par2,isonper);

	TopOpeBRepDS_Transition newT;
	// -------
	// we have IFOR=(FORWARD(FS),G,FS) + IREV=(REVERSED(FS),G,FS)
	Standard_Integer IES = 0;	
	if (nFSE == 0) {
	  gp_Pnt2d uvFS; Standard_Boolean ok = FUN_tool_parF(E,par,FS,uvFS);
	  if (!ok) {FUN_Raise(); continue;}
	  
	  TopOpeBRepTool_makeTransition MKT; TopAbs_State stb = TopAbs_UNKNOWN,sta = TopAbs_UNKNOWN; 
	  ok = MKT.Initialize(E,par1,par2,par, FS,uvFS, factor);
	  if (ok) ok = MKT.MkTonE(stb,sta);
	  if (!ok) {FUN_Raise(); continue;}  
	  newT.Before(stb); newT.After(sta);   
	}
	else  {
	  IES = lFSE.First()->Support();
	  const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(IES));	  
	  Standard_Real parES; Standard_Boolean ok = FUN_tool_parE(E,par,ES,parES);
	  if (!ok) {FUN_Raise(); continue;} 
	  gp_Pnt2d uvFS; ok = FUN_tool_paronEF(ES,parES,FS,uvFS);
	  if (!ok) {FUN_Raise(); continue;}

	  TopOpeBRepTool_makeTransition MKT; TopAbs_State stb = TopAbs_UNKNOWN,sta = TopAbs_UNKNOWN; 
	  ok = MKT.Initialize(E,par1,par2,par, FS,uvFS, factor);
	  if (ok) ok = MKT.SetRest(ES,parES);
	  if (ok) ok = MKT.MkTonE(stb,sta);
	  if (!ok) {FUN_Raise(); continue;}  
	  newT.Before(stb); newT.After(sta);   
	}

	// newI :
	//------
	iFS = IFS;
	newT.Index(IFS);
	Standard_Boolean B = Standard_False;
	if (K == TopOpeBRepDS_VERTEX) B = Handle(TopOpeBRepDS_EdgeVertexInterference)::DownCast(IFOR)->GBound();	
	Handle(TopOpeBRepDS_Interference) newI = MakeEPVInterference(newT,IFS,G,par,K,TopOpeBRepDS_FACE,B);
	lnewI.Append(newI);
	if (nFSE != 0) {
	  Handle(TopOpeBRepDS_Interference) newIFE = MakeEPVInterference(newT,IES,G,par,K,TopOpeBRepDS_EDGE,B);
	  lnewI.Append(newIFE);
	}
      } // it(lFOR)

      if (iFS != 0) {
	TopOpeBRepDS_ListOfInterference& loii = tki.ChangeValue(K,G);
	TopOpeBRepDS_ListOfInterference lEFS;
#ifdef DEB
//        Standard_Integer nIFS =
#endif
                   FUN_selectITRASHAinterference(loii,iFS,lEFS);
	for (TopOpeBRepDS_ListIteratorOfListOfInterference iti(lnewI); iti.More(); iti.Next()) {
	  Handle(TopOpeBRepDS_Interference) newI = iti.Value();
	  loii.Append(newI);
#ifdef DEB
	  if (trc) {cout<<"completeforE7 on edge "<<IE<<" ";newI->Dump(cout);cout<<endl;}
#endif
	} 
      }
    } // tki     

    TopOpeBRepDS_ListOfInterference& LII = BDS.ChangeShapeInterferences(E); 
    LII.Clear(); 
    for (tki.Init(); tki.More(); tki.Next()) {   
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G); 
      FDS_copy(loi,LII);
    }    
  } //i = 1..ns
} //completeforE7

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE8(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu020998 : Attached to section edge SE :
//  - {I1d=(Tr(Esd),vG,Esd), I2d=(Tr(F),vG,E)}
//  - E and Esd are F edges
//   I2d may be incomplete, "reduce" 2d/1d -> {I1d,newI2d}
// cto902A6 (ES5,Esd10,vG7,F35)
// prequesitory : A vertex is shared by at most 2 edges in the same face.
//                An edge is shared by at most 2 faces of same rank.
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();

  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
    Standard_Integer ISE = BDS.Shape(SE);
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(SE);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse8(ISE);
#endif

    Standard_Boolean hasnew = Standard_False;
    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);  
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind KK; Standard_Integer GG; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(KK,GG);      
      Standard_Boolean isvertex = (KK == TopOpeBRepDS_VERTEX);
#ifdef DEB
//      Standard_Boolean ispoint =  (KK == TopOpeBRepDS_POINT);
#endif
      if (isvertex) {
	Standard_Boolean Ghsdm = HDS->HasSameDomain(BDS.Shape(GG));
	if (Ghsdm) continue;
      }
      // li -> l1dE + l2dFE + lFE(<=>l3dFE) + li(<=>lFF)
      TopOpeBRepDS_ListOfInterference li; FDS_assign(loi,li);
      TopOpeBRepDS_ListOfInterference l1dE;  Standard_Integer n1d = FUN_selectTRASHAinterference(li,TopAbs_EDGE,l1dE);  // li->l1dE+li(<=>lF?)
      TopOpeBRepDS_ListOfInterference lFE;
#ifdef DEB
//      Standard_Integer nFE =
#endif
                FUN_selectSKinterference(li,TopOpeBRepDS_EDGE,lFE); // li(<=>lF?)->lFE+li(<=>lFF)
      TopOpeBRepDS_ListOfInterference l2dFE; Standard_Integer n2d = FUN_selectpure2dI(li,lFE,l2dFE);                    // lFE->l2dFE+lFE(<=>l3dFE)
#ifdef DEB
//      Standard_Integer n3d = lFE.Extent();
#endif

      Standard_Boolean redu2d = (n1d > 0)&&(n2d > 0);
      // -------------------------------
      if (redu2d) { // {I1d=(Tr(Esd),vG,Esd), I2d=(Tr(F),vG,E)}	
	TopOpeBRepDS_ListIteratorOfListOfInterference it(l2dFE); TopOpeBRepDS_ListOfInterference al2dFE;
	while (it.More()) {
	  Handle(TopOpeBRepDS_Interference)& I2dFE = it.Value();
	  TopOpeBRepDS_Transition newT2d; Standard_Boolean ok = FUN_ds_redu2d1d(BDS,ISE,I2dFE,l1dE, newT2d);
	  if (!ok) {it.Next(); continue;}
	  I2dFE->ChangeTransition() = newT2d; al2dFE.Append(I2dFE);
#ifdef DEB
	  if (trc) {cout<<"SE8 -> on SE"<<ISE<<" reducedI :";I2dFE->Dump(cout);cout<<endl;}
#endif    
	  l2dFE.Remove(it); 
	}
	l2dFE.Append(al2dFE);
      } // redu2d

      TopOpeBRepDS_ListOfInterference& loii = tki.ChangeValue(KK,GG);     
      loii.Clear();
      loii.Append(l1dE); loii.Append(lFE); loii.Append(l2dFE); loii.Append(li); 
    }// tki

    if (!hasnew) continue;
    TopOpeBRepDS_ListOfInterference& LII = BDS.ChangeShapeInterferences(SE); 
    LII.Clear();
    for (tki.Init(); tki.More(); tki.Next()) {  
      TopOpeBRepDS_Kind KK; Standard_Integer GG; TopOpeBRepDS_ListOfInterference& loi = tki.ChangeValue(KK,GG);  
      LII.Append(loi);
    }
  }// i=1..nse
}// completeforSE8

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_completeforSE9(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu011098 : CTS21180(ES13)
// purpose : ES Section edge, sdm with EsdSE={Esd}, ES has no interference
//   compute interferences for ES.
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();  

  for (Standard_Integer i = 1; i <= nse; i++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(i);
    Standard_Integer rkSE = BDS.AncestorRank(SE);
    Standard_Integer ISE = BDS.Shape(SE);   
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(ISE);
    if (trc) debse9(ISE);
#endif    
    Standard_Boolean hsd = HDS->HasSameDomain(SE);
    if (!hsd) continue;
    if (!BDS.ShapeInterferences(SE).IsEmpty()) continue;

    const TopTools_ListOfShape& EsdSE = BDS.ShapeSameDomain(SE);
    TopTools_ListIteratorOfListOfShape ite(EsdSE);
    for (; ite.More(); ite.Next()){
      const TopoDS_Edge& Esd = TopoDS::Edge(ite.Value()); Standard_Integer iEsd = BDS.Shape(Esd);
      Standard_Integer rkEsd = BDS.AncestorRank(Esd);
      if (rkEsd == rkSE) continue;
      const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(Esd); 
      if (LI.IsEmpty()) continue;
     
      TopOpeBRepDS_ListOfInterference LIcopy; FDS_assign(LI,LIcopy);
      TopOpeBRepDS_ListOfInterference LISE;
#ifdef DEB
//      Standard_Integer nise =
#endif
                 FUN_selectSIinterference(LIcopy,ISE,LISE);
      
      TopOpeBRepDS_TKI tki; tki.FillOnGeometry(LISE);  
      for (tki.Init(); tki.More(); tki.Next()) {     
	TopOpeBRepDS_Kind K;
        Standard_Integer G;
//        const TopOpeBRepDS_ListOfInterference& loi = 
        tki.Value(K,G); 
#ifdef DEB
//	const Handle(TopOpeBRepDS_Interference)& I = loi.First();
//	TopAbs_Orientation O = I->Transition().Orientation(TopAbs_IN);
#endif
	const TopoDS_Vertex& vG = TopoDS::Vertex(BDS.Shape(G));
	Standard_Boolean hsd1 = HDS->HasSameDomain(vG);
	if (hsd1) continue; //nyixpu011098
	Standard_Integer rkG = BDS.AncestorRank(G);
	if (rkG != rkSE) continue; //nyixpu011098

	// newI : 
	// -----
	TopOpeBRepDS_Transition newT(TopAbs_IN,TopAbs_IN,TopAbs_EDGE,TopAbs_EDGE); newT.Index(iEsd);
	// modified by NIZHNY-MKK  Mon Apr  2 15:39:14 2001.BEGIN
	Standard_Integer hasvG = FUN_tool_orientVinE(vG,SE);
	if(hasvG==0) {
	  continue;
	}
	// modified by NIZHNY-MKK  Mon Apr  2 15:39:17 2001.END

	Standard_Real par = BRep_Tool::Parameter(vG,SE);
	Handle(TopOpeBRepDS_Interference) newI = MakeEPVInterference(newT,iEsd,G,par,TopOpeBRepDS_VERTEX,TopOpeBRepDS_EDGE,Standard_True);
#ifdef DEB
	if (trc) {cout<<"completeforSE6 on section edge "<<ISE<<" ";newI->Dump(cout);cout<<endl;}
#endif
	HDS->StoreInterference(newI,SE); 
      } 
    }//ite(EsdSE)
  }//i=1..nse
} //completeforSE9 

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_PointToVertex(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu090698 : for gap reasons, intersector IntPatch can find a intersection
// point POINT, whereas it should be a VERTEX,
// if we find edge eb / eb : EPI(T1,G,ea1),
//                           EPI(T2,G,a2) with rk(ea1) = rk(ea2), 
// then G should be VERTEX (2 edges of same shape cannot 
// intersect) - recall : in the DS, we do not bind twice the same closing edge-
// CTS20339
{  
  Standard_Integer i ;
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  TColStd_DataMapOfIntegerInteger iPiV;

  for ( i = 1; i <= ns; i++) {
    const TopoDS_Shape& s = BDS.Shape(i);
    if (s.ShapeType() != TopAbs_EDGE) continue;
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(s);
    if (LI.IsEmpty()) continue;

    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);      
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);  
      if (K == TopOpeBRepDS_VERTEX) continue;
      
      Standard_Integer Scur = 0; Standard_Boolean Gfaulty = Standard_False;
      for (TopOpeBRepDS_ListIteratorOfListOfInterference it(loi); it.More(); it.Next()){
	const Handle(TopOpeBRepDS_Interference)& I = it.Value();
	TopOpeBRepDS_Kind GT,ST = TopOpeBRepDS_UNKNOWN;
        Standard_Integer G1,S = 0;
        FDS_data(I,GT,G1,ST,S);
	if (ST != TopOpeBRepDS_EDGE) continue;
	if (Scur == 0) {
	  Scur = S;
	}
	if (S != Scur) {
	  Gfaulty = Standard_True; break;
	}
      } // it     
      if (Gfaulty) {
	// in DS : pG --> vG
	gp_Pnt pG = BDS.Point(G).Point();
	Standard_Integer rkES = BDS.AncestorRank(Scur);
	const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(Scur));
	TopoDS_Vertex vf,vl; TopExp::Vertices(ES,vf,vl);
	gp_Pnt pf = BRep_Tool::Pnt(vf); gp_Pnt pl = BRep_Tool::Pnt(vl);
	Standard_Real df = pf.Distance(pG); Standard_Real dl = pl.Distance(pG);
	TopoDS_Vertex vG; 
	if (df < dl) vG = vf;
	else         vG = vl;
	
	Standard_Integer ivG = BDS.AddShape(vG,rkES);
	iPiV.Bind(G,ivG);
      } // Gfaulty    
    } // tki 
  } // i

  if (iPiV.IsEmpty()) return;
  for (i = 1; i <= ns; i++) {
    const TopoDS_Shape& s = BDS.Shape(i);
    if (s.ShapeType() != TopAbs_EDGE) continue;
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(s);
    if (LI.IsEmpty()) continue;

    TopOpeBRepDS_ListOfInterference newLI;
    Standard_Integer rks = BDS.AncestorRank(s);
    TopOpeBRepDS_TKI tki;
    tki.FillOnGeometry(LI);   
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind K;
      Standard_Integer G;
      const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);  
      Standard_Boolean Gisbound = iPiV.IsBound(G);
      if (!Gisbound) {
	FDS_copy(loi,newLI);
	continue;
      }

      Standard_Integer ivG = iPiV.Find(G);
      const TopoDS_Vertex& vG = TopoDS::Vertex(BDS.Shape(ivG));
      Standard_Integer rkG = BDS.AncestorRank(ivG);      
      Standard_Boolean Gbound = (rkG == rks);      
  
      for (TopOpeBRepDS_ListIteratorOfListOfInterference itl(loi); itl.More(); itl.Next()){
	const Handle(TopOpeBRepDS_Interference)& I = itl.Value();
	const Handle(TopOpeBRepDS_CurvePointInterference)& CPI = Handle(TopOpeBRepDS_CurvePointInterference)::DownCast(I);
	if (CPI.IsNull()) continue;

	Standard_Real par = CPI->Parameter(); 
	TopOpeBRepDS_Kind GT,ST = TopOpeBRepDS_UNKNOWN;
        Standard_Integer G1,S = 0;
        FDS_data(I,GT,G1,ST,S);
	const TopOpeBRepDS_Transition& T = I->Transition();
	Standard_Real parvG; Standard_Boolean ok = FUN_tool_parVonE(vG,TopoDS::Edge(s),parvG);
	// modified by NIZHNY-MKK  Mon Apr  2 15:39:59 2001.BEGIN
	// 	if (!ok) par = parvG;
	if (!ok) 
	  continue;
	par = parvG;
	// modified by NIZHNY-MKK  Mon Apr  2 15:40:04 2001.END
	Handle(TopOpeBRepDS_Interference) newI = MakeEPVInterference(T,S,ivG,par,TopOpeBRepDS_VERTEX,ST,Gbound);
	newLI.Append(newI);
      }     
    } // tki
    TopOpeBRepDS_ListOfInterference& LII = BDS.ChangeShapeInterferences(s);
    LII.Clear(); LII.Append(newLI);
  } // i

  TColStd_DataMapIteratorOfDataMapOfIntegerInteger itm(iPiV);
  for (; itm.More(); itm.Next()){
    Standard_Integer G = itm.Key();
    BDS.RemovePoint(G);
  }  
}//PointToVertex

static Standard_Boolean FUN_redusamshaonE(const TopOpeBRepDS_DataStructure& BDS,const Handle(TopOpeBRepDS_Interference)& I,const Standard_Integer EIX, Handle(TopOpeBRepDS_Interference)& newI)
// attached to edge(EIX) : IFOR=(FORWARD(ES),G,ES) + IREV=(REVERSED(ES),G,ES)
{
  newI.Nullify();
  TopAbs_ShapeEnum SB,SA;Standard_Integer IB,IA;TopOpeBRepDS_Kind GT = TopOpeBRepDS_UNKNOWN,ST;Standard_Integer G = 0,S = 0;
  FDS_Idata(I,SB,IB,SA,IA,GT,G,ST,S); 
  const TopoDS_Edge& E = TopoDS::Edge(BDS.Shape(EIX));
  Standard_Real parE = FDS_Parameter(I); Standard_Real f,l; FUN_tool_bounds(E,f,l);
  const TopoDS_Edge& ES = TopoDS::Edge(BDS.Shape(S));
  const TopoDS_Face& FTRA = TopoDS::Face(BDS.Shape(IB));
  Standard_Real parES; Standard_Boolean ok = FUN_tool_parE(E,parE,ES,parES);
  if (!ok) return Standard_False;
  gp_Pnt2d uv; ok = FUN_tool_paronEF(ES,parES,FTRA,uv);
  if (!ok) return Standard_False;

  Standard_Real factor = 1.e-2; TopAbs_State stb = TopAbs_UNKNOWN,sta = TopAbs_UNKNOWN; 
  TopOpeBRepTool_makeTransition MKT; 
  ok = MKT.Initialize(E,f,l,parE, FTRA,uv, factor);
  if (ok) ok = MKT.SetRest(ES,parES);
  if (ok) ok = MKT.MkTonE(stb,sta); 
  if (!ok) return Standard_False;
  TopOpeBRepDS_Transition newT; newT.Index(IB); newT.Before(stb);newT.After(sta);   

  ok = FDS_stateEwithF2d(BDS,E,parE,GT,G,FTRA,newT);
  if (!ok) return Standard_False;

  Standard_Boolean B = Standard_False; if (GT == TopOpeBRepDS_VERTEX) B = Handle(TopOpeBRepDS_EdgeVertexInterference)::DownCast(I)->GBound();
  newI = MakeEPVInterference(newT,S,G,parE,GT,TopOpeBRepDS_EDGE,B);
  return Standard_True;
}//FUN_redusamshaonE

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_redusamsha(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// xpu201098 : reduce 2d interferences on same G and same S :
//   {I1=(OU/IN(F),G,ES), I2=(IN/OU(F),G,ES)}
// cto009K1 (SE7,ES8,G2,FTRA27)
//xpu050299 (FRA60618 e13,ftrasha14)
{  
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes(); 

  for (Standard_Integer i = 1; i <= ns; i++) {
    if (BDS.Shape(i).ShapeType() != TopAbs_EDGE) continue;

    const TopoDS_Edge& E = TopoDS::Edge(BDS.Shape(i));
#ifdef DEB    
//    Standard_Boolean isse = BDS.IsSectionEdge(E);
//    Standard_Integer rkE = BDS.AncestorRank(E);
#endif
    Standard_Integer IE = BDS.Shape(E);   
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(IE);
    if (trc) debsamsha(IE);
#endif    
    TopOpeBRepDS_TKI tki;
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(i);
    tki.FillOnGeometry(LI);      
    for (tki.Init(); tki.More(); tki.Next()) {     
      TopOpeBRepDS_Kind K; Standard_Integer G; const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);  
      TopOpeBRepDS_ListOfInterference loicopy; FDS_copy(loi,loicopy); // loi -> l1+l2
      TopOpeBRepDS_ListOfInterference l0;
#ifdef DEB    
//      Standard_Integer n0 =
#endif
               FUN_selectTRASHAinterference(loicopy,TopAbs_EDGE,l0);//xpu091198(cylcong)
      TopOpeBRepDS_ListOfInterference l1; Standard_Integer nfound = FUN_selectTRASHAinterference(loicopy,TopAbs_FACE,l1);
      TopOpeBRepDS_ListOfInterference l2; nfound = FUN_selectSKinterference(l1,TopOpeBRepDS_EDGE,l2);
      // l2 = {I=(T(faceTRASHA),G,Sedge)}
      if (nfound == 0) continue;

      //***    
      TopOpeBRepDS_TKI tkis; tkis.FillOnSupport(l2);    
      for (tkis.Init(); tkis.More(); tkis.Next()) {  
	TopOpeBRepDS_Kind k; Standard_Integer s; TopOpeBRepDS_ListOfInterference& li = tkis.ChangeValue(k,s);   
	Standard_Integer nli = li.Extent();
	if (nli < 2) continue; 

	Handle(TopOpeBRepDS_Interference) newI;
	TopOpeBRepDS_ListIteratorOfListOfInterference it1(li);
	while (it1.More()) {
	  const Handle(TopOpeBRepDS_Interference)& I1 = it1.Value();
	  const TopOpeBRepDS_Transition& T1 = I1->Transition();
	  TopAbs_Orientation O1 = T1.Orientation(TopAbs_IN);
	  if (!M_FORWARD(O1) && !M_REVERSED(O1)) {it1.Next(); continue;}
	  TopAbs_ShapeEnum SB1,SA1;Standard_Integer IB1,IA1;TopOpeBRepDS_Kind GT1,ST1;Standard_Integer G1,S1 = 0;
	  FDS_Idata(I1,SB1,IB1,SA1,IA1,GT1,G1,ST1,S1);
	  if (IB1 != IA1) {it1.Next(); continue;}
	  
	  Standard_Boolean oppofound = Standard_False;
	  TopOpeBRepDS_ListIteratorOfListOfInterference it2(it1); it2.Next();
	  while (it2.More()) {
	    const Handle(TopOpeBRepDS_Interference)& I2 = it2.Value();
	    const TopOpeBRepDS_Transition& T2 = I2->Transition();
	    TopAbs_Orientation O2 = T2.Orientation(TopAbs_IN);
	    TopAbs_ShapeEnum SB2,SA2;Standard_Integer IB2,IA2;TopOpeBRepDS_Kind GT2,ST2;Standard_Integer G2,S2 = 0;
	    FDS_Idata(I2,SB2,IB2,SA2,IA2,GT2,G2,ST2,S2);
	    if (IB2 != IA2) {it2.Next(); continue;}
	    if (IB1 != IB2) {it2.Next(); continue;} // same fTRASHA
	    if (S1 != S2)   {it2.Next(); continue;} // same Sedge
	    
	    if (O1 == TopAbs::Complement(O2)) {oppofound=Standard_True; break;}
	    else {it2.Next(); continue;}
	  } // it2(it1)

	  if (!oppofound) {it1.Next(); continue;}
	  Standard_Boolean ok = FUN_redusamshaonE(BDS,I1,IE,newI);
	  if (!ok) {it1.Next(); continue;}
	  else break;
	} //it1(li)
	if (newI.IsNull()) continue;
#ifdef DEB
	if (trc) {cout<<"redusamsha se"<<IE<<"FORWARD/REVERSED ->";newI->Dump(cout);cout<<endl;}
#endif      
	li.Clear(); li.Append(newI);
      }//tkis(l2)      
      //***
      
      TopOpeBRepDS_ListOfInterference& newloi = tki.ChangeValue(K,G); newloi.Clear();
      for (tkis.Init(); tkis.More(); tkis.Next()) {  
	TopOpeBRepDS_Kind k; Standard_Integer g; TopOpeBRepDS_ListOfInterference& li = tkis.ChangeValue(k,g); 
	newloi.Append(li);
      }  
      newloi.Append(l0); newloi.Append(l1);
    }// tki(LI)

    TopOpeBRepDS_ListOfInterference& newLI = BDS.ChangeShapeInterferences(E);
    newLI.Clear();
    for (tki.Init(); tki.More(); tki.Next()) {  
      TopOpeBRepDS_Kind KK; Standard_Integer GG; TopOpeBRepDS_ListOfInterference& loi = tki.ChangeValue(KK,GG);  
      newLI.Append(loi);
    }
  }// i=1..nse  
} //FUN_ds_redusamsha

Standard_EXPORT Standard_Boolean FUN_ds_hasFEI(const TopOpeBRepDS_PDataStructure& pDS2d, const TopoDS_Shape& F, const Standard_Integer GI, const Standard_Integer ITRA)
{
  Standard_Boolean hasF = pDS2d->HasShape(F);
  if (!hasF) return Standard_False;

  const TopOpeBRepDS_ListOfInterference& LI = pDS2d->ShapeInterferences(F);
  for (TopOpeBRepDS_ListIteratorOfListOfInterference it(LI); it.More(); it.Next()){
    const Handle(TopOpeBRepDS_Interference)& I = it.Value();
    const TopOpeBRepDS_Transition& T = I->Transition();
    TopOpeBRepDS_Kind GT,ST; Standard_Integer G = 0,S; FDS_data(I,GT,G,ST,S);
    Standard_Boolean found = (G == GI) && (T.Index() == ITRA);
    if (found) return Standard_True;
  }
  return Standard_False;
} //FUN_ds_hasFEI

Standard_EXPORT Standard_Boolean FUN_ds_ONesd(const TopOpeBRepDS_DataStructure& BDS, const Standard_Integer IE, const TopoDS_Shape& EspON, Standard_Integer& IEsd)
{
  const TopoDS_Shape& E = BDS.Shape(IE);
  TopTools_ListIteratorOfListOfShape it(BDS.ShapeSameDomain(E));
  Standard_Real f,l; FUN_tool_bounds(TopoDS::Edge(EspON),f,l);
  Standard_Real x = 0.456789; Standard_Real par = (1-x)*f + x*l;
  gp_Pnt p3d; Standard_Boolean ok = FUN_tool_value(par,TopoDS::Edge(EspON),p3d);
  if (!ok) return Standard_False;

  for (; it.More(); it.Next()) {
    const TopoDS_Edge& esd = TopoDS::Edge(it.Value());
    Standard_Real d=0., parp; ok = FUN_tool_projPonE(p3d,esd,parp,d);
    if (!ok) continue;
    Standard_Real tolesd = BRep_Tool::Tolerance(esd);
    ok = (d < tolesd*1.e3); //nyi checktole
    if (!ok) continue;
    IEsd = BDS.Shape(esd);
    return Standard_True;
  }
  return Standard_False;
} //FUN_ds_ONesd

/*#define FIRST (1)
#define LAST  (2)
static Standard_Boolean FUN_oriTOsta(const Standard_Integer o, const TopAbs_State sta, TopAbs_Orientation& ori)
{
  Standard_Boolean ok = (sta == TopAbs_OUT) || (sta == TopAbs_IN);
  if (!ok) return Standard_False;
  ok = (o == FIRST) || (o == LAST);
  if (!ok) return Standard_False;

  ori = TopAbs_EXTERNAL;
  if (o == FIRST) ori = TopAbs_FORWARD;
  if (o == LAST)  ori = TopAbs_REVERSED;
  if (sta == TopAbs_OUT) ori = TopAbs::Complement(ori);
  return Standard_True;
} //FUN_oriTOsta

Standard_EXPORT void FUN_ds_unkeepEVIonGb1(const Handle(TopOpeBRepDS_HDataStructure)& HDS, const TopAbs_State sta)
// xpu290698 :
// Completing filter process for edges : delete of interferences
// EVI on gbound1, we keep only interferences on Gb1 describing transitions 
// on e / e is IN the solid (if sta = IN)
//        e is OU the solid (if sta = OU)
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  for (Standard_Integer i = 1; i <= ns; i++) {   
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(i);
    if (trc) debgb1(i);
#endif
    const TopoDS_Shape& s = BDS.Shape(i);
    if (s.ShapeType() != TopAbs_EDGE) continue;

    const TopoDS_Edge& E = TopoDS::Edge(s);
    TopOpeBRepDS_ListOfInterference& LI = BDS.ChangeShapeInterferences(s);
    if (LI.IsEmpty()) continue;

    Standard_Boolean dgE = BRep_Tool::Degenerated(E);
    if (dgE) continue;
    TopoDS_Vertex dum; Standard_Boolean closed = FUN_tool_ClosedE(E,dum);
    if (closed) continue;
    
    TopOpeBRepDS_Kind K; Standard_Integer G; Standard_Boolean ok = Standard_False;
    TopOpeBRepDS_TKI tki; tki.FillOnGeometry(LI);

    for (tki.Init(); tki.More(); tki.Next()) {
      tki.Value(K,G);
      if (K != TopOpeBRepDS_VERTEX) break;
      ok = Standard_True;
    } // tki   
    if (!ok) continue;

    TopOpeBRepDS_ListOfInterference newLI;
    for (tki.Init(); tki.More(); tki.Next()) {
      tki.Value(K,G);
      const TopOpeBRepDS_ListOfInterference& loi = tki.Value(K,G);

      const TopoDS_Vertex& V = TopoDS::Vertex(BDS.Shape(G));
      Standard_Integer o = FUN_tool_orientVinE(V,E);
      if (o == 0) {FDS_copy(loi,newLI); continue;}
      TopAbs_Orientation ori; Standard_Boolean okk = FUN_oriTOsta(o,sta,ori);
      if (!okk)   {FDS_copy(loi,newLI); continue;}

      // attached to E at G : loi = {I} / I is EVIonGb1      
      TopOpeBRepDS_ListOfInterference newloi;
      for (TopOpeBRepDS_ListIteratorOfListOfInterference it(loi); it.More(); it.Next()) {
	const Handle(TopOpeBRepDS_Interference)& I = it.Value();
	const TopAbs_Orientation& O = I->Transition().Orientation(TopAbs_IN);
	if (O == ori) {	
	  newloi.Append(I);
	  continue;
	}   
#ifdef DEB 
	if (trc) {cout<<"unkeepEVIonGb1 on e"<<i<<" ";I->Dump(cout);cout<<endl;}
#endif
      }      
      Standard_Integer nnewI = newloi.Extent();
      Standard_Integer nI = loi.Extent();
      Standard_Boolean ko = (nnewI > 1) && (nnewI != nI); // complex transitions at G
                                             // NYI : correcting reducing cto 001 W3 (e35)
      if (!ko) newLI.Append(newloi);    
//      newLI.Append(newloi); //xpu280898 : cto905J1 (e25,v8)
    } // tki
    LI.Clear(); LI.Append(newLI);

  } // i=1..ns
} //FUN_ds_unkeepEVIonGb1*/

Standard_EXPORT Standard_Boolean FDS_LOIinfsup(
                                    const TopOpeBRepDS_DataStructure&
#ifdef DEB
                                                                      BDS
#endif
                                    ,const TopoDS_Edge& E,
                                    const Standard_Real pE,
				    const TopOpeBRepDS_Kind KDS,
                                    const Standard_Integer GDS,
				    const TopOpeBRepDS_ListOfInterference& LOI,
                                    Standard_Real& pbef,
                                    Standard_Real& paft,
                                    Standard_Boolean& isonboundper)
{
#ifdef DEB
  Standard_Integer EIX = BDS.Shape(E);
  Standard_Boolean TRC=DSREDUEDGETRCE(EIX);
  TRC = Standard_False; // xpu170898
  if (TRC) cout<<endl<<"FDS_LOIinfsup.1 E"<<EIX<<" : "<<LOI.Extent()<<endl;
  if (TRC) debredpvg(EIX);
#endif

  Standard_Real f,l; FUN_tool_bounds(E,f,l);
  pbef = f; paft = l;
  Standard_Integer n = LOI.Extent(); 
  if (n == 0) return Standard_True;


  TopOpeBRepDS_ListOfInterference LOIsansGDS;
  TopOpeBRepDS_TKI tki; tki.FillOnGeometry(LOI);
#ifdef DEB
  if (TRC) cout<<endl<<"FDS_LOIinfsup E"<<EIX<<" tki"<<endl;
  if (TRC) tki.DumpTKIIterator("","\n");
  if (TRC) debredpvg(EIX);
#endif

  for(tki.Init();tki.More();tki.Next()) {
    TopOpeBRepDS_Kind K; Standard_Integer G; tki.Value(K,G);
    Standard_Boolean PV =(K==TopOpeBRepDS_POINT)||(K==TopOpeBRepDS_VERTEX);if (!PV) continue;
    Standard_Boolean mk = (K == KDS); Standard_Boolean mg = (G == GDS); 
    Standard_Boolean mkg = (mk && mg); if ( mkg ) continue;

#ifdef DEB
    if (TRC) {tki.DumpTKI(K,G,"","\n");debredpvg(EIX);}
#endif

    TopOpeBRepDS_ListOfInterference& loi = tki.ChangeValue(K,G);
#ifdef DEB
//    Standard_Integer nloi = loi.Extent();
#endif
    for (TopOpeBRepDS_ListIteratorOfListOfInterference it(loi);it.More();it.Next()) {
      const Handle(TopOpeBRepDS_Interference)& I = it.Value();
      TopOpeBRepDS_Kind GT1,ST1; Standard_Integer G1,S1; TopAbs_ShapeEnum tsb1,tsa1; Standard_Integer isb1,isa1; 
      FDS_Idata(I,tsb1,isb1,tsa1,isa1,GT1,G1,ST1,S1);
      if (tsb1 != TopAbs_FACE) continue;
      if (tsa1 != TopAbs_FACE) continue;
      const Handle(TopOpeBRepDS_CurvePointInterference)& cpi = Handle(TopOpeBRepDS_CurvePointInterference)::DownCast(I);
      const Handle(TopOpeBRepDS_EdgeVertexInterference)& evi = Handle(TopOpeBRepDS_EdgeVertexInterference)::DownCast(I);
      if (cpi.IsNull() && evi.IsNull()) continue;
      LOIsansGDS.Append(I);
      break;
    }
  }
  
#ifdef DEB
  if (TRC) cout<<endl<<"FDS_LOIinfsup.2 E"<<EIX<<" : "<<LOIsansGDS.Extent()<<endl;
  if (TRC) debredpvg(EIX);
#endif
  
  n = LOIsansGDS.Extent();  
  if (n == 0) return Standard_True;

  TopoDS_Vertex v; Standard_Boolean Eclosed = TopOpeBRepTool_TOOL::ClosedE(E,v);
  Standard_Real tole = BRep_Tool::Tolerance(E);
  Standard_Real tol = Precision::Parametric(tole);
  isonboundper = Standard_False;
  if (Eclosed) {
    Standard_Real tolv = BRep_Tool::Tolerance(v);
    tolv = Precision::Parametric(tolv);
    if (tolv > tol) tol = tolv;
    Standard_Boolean pEisEf = (Abs(pE-f) <= tol);
    Standard_Boolean pEisEl = (Abs(pE-l) <= tol);
    isonboundper = pEisEf || pEisEl;
  }

  if (isonboundper) {    
    for (TopOpeBRepDS_ListIteratorOfListOfInterference it(LOIsansGDS);it.More();it.Next()) {
      const Handle(TopOpeBRepDS_Interference)& I = it.Value();
      Standard_Real p = FDS_Parameter(I);
      // pbef > paft
      if (p > pbef) pbef = p;
      if (p < paft) paft = p;
    }    
    return Standard_True;
  }
  else {
    for (TopOpeBRepDS_ListIteratorOfListOfInterference it(LOIsansGDS);it.More();it.Next()) {
      const Handle(TopOpeBRepDS_Interference)& I = it.Value();
      Standard_Real p = FDS_Parameter(I);
      if (p > pbef && p < pE) pbef = p;
      if (p < paft && p > pE) paft = p;
    }
  }
  return Standard_True;
} // FDS_LOIinfsup

// sur arete E : pbef < pE < paft, calcul de p1,t2 / :
// p1 dans [pbef,pE[
// p2 dans ]pE,paft]
// si isonboundper = T, les bornes pbef et paft sont prises sur les bornes de E.
Standard_EXPORT Standard_Boolean FDS_parbefaft(
//                                    const TopOpeBRepDS_DataStructure& BDS,
                                    const TopOpeBRepDS_DataStructure& ,
                                    const TopoDS_Edge& E,
                                    const Standard_Real pE,
				    const Standard_Real& pbef,
                                    const Standard_Real& paft,
                                    const Standard_Boolean& isonboundper,
				    Standard_Real& p1, Standard_Real& p2)
{
  Standard_Real t = 0.3178947713;
  Standard_Real f,l; FUN_tool_bounds(E,f,l);
  if (isonboundper) {
    p1 = (1-t)*pbef + t*l;
    p2 = (1-t)*f + t*paft;
  }
  else {
    p1 = (1-t)*pbef + t*pE;
    p2 = (1-t)*pE + t*paft; 
  }
  return Standard_True;
} // FDS_parbefaft

Standard_EXPORT Standard_Boolean FDS_stateEwithF2d(const TopOpeBRepDS_DataStructure& BDS,const TopoDS_Edge& E,const Standard_Real pE,
				      const TopOpeBRepDS_Kind KDS,const Standard_Integer GDS,
				      const TopoDS_Face& F1,
				      TopOpeBRepDS_Transition& TrmemeS)
{
  const TopOpeBRepDS_ListOfInterference& LOI = BDS.ShapeInterferences(E);
  Standard_Real pbef,paft; Standard_Boolean isonper; Standard_Boolean ok = FDS_LOIinfsup(BDS,E,pE,KDS,GDS,LOI,pbef,paft,isonper);
  if (!ok) return Standard_False;
  Standard_Real t1,t2; ok = FDS_parbefaft(BDS,E,pE,pbef,paft,isonper,t1,t2);
  gp_Pnt P1; Standard_Boolean ok1 = FUN_tool_value(t1,E,P1);
  gp_Pnt P2; Standard_Boolean ok2 = FUN_tool_value(t2,E,P2);
  if (!ok1 || !ok2) return Standard_False;

  TopOpeBRepTool_ShapeClassifier& PSC = FSC_GetPSC(F1);
  TopAbs_State sta1 = FSC_StatePonFace(P1,F1,PSC);
  TopAbs_State sta2 = FSC_StatePonFace(P2,F1,PSC);

  // xpu190898 : cto014I2 (e5,fTRASHA14,vG7,eS10)
  if (sta1 == TopAbs_ON) sta1 = TopAbs_IN;
  if (sta2 == TopAbs_ON) sta2 = TopAbs_IN;

  TrmemeS.Before(sta1,TopAbs_FACE);
  TrmemeS.After (sta2,TopAbs_FACE);
  return Standard_True;
}//FDS_stateEwithF2d

#define SAMEORIENTED (1)
#define DIFFORIENTED (2)
Standard_EXPORT void FUN_ds_FEIGb1TO0(Handle(TopOpeBRepDS_HDataStructure)& HDS,
				      const TopOpeBRepDS_DataMapOfShapeListOfShapeOn1State& MEspON)
{
  //xpu250199 :  F has FEI(Gb1,  EG, FS), EG sdm Esd
  //            -> to prevent from the loss of information, replace interference with
  //                   FEI'(Gb0, EGsd, FS)
  //CTS21754, f26 has FEI(Gb1,EG=e13, FS=f16), EG13 sd Esd11
  
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer ns = BDS.NbShapes();
  for (Standard_Integer I=1; I<=ns; I++) {

    const TopoDS_Shape& F = BDS.Shape(I);
    if (F. ShapeType() != TopAbs_FACE) continue;
    const TopOpeBRepDS_ListOfInterference& LI = BDS.ShapeInterferences(F);    
#ifdef DEB    
    Standard_Boolean trc = TopOpeBRepDS_GettraceSPSX(I);
    if (trc) debgb1(I);
#endif
    
    TopOpeBRepDS_ListOfInterference LGb1; // LI = LII + LGb1 (= {FEI with GB1})
    TopOpeBRepDS_ListOfInterference LII; FDS_copy(LI,LII);
    TopOpeBRepDS_ListIteratorOfListOfInterference it(LII);
    while (it.More()) {
      const Handle(TopOpeBRepDS_Interference)& Intf = it.Value();
      Handle(TopOpeBRepDS_FaceEdgeInterference) FEI =
        Handle(TopOpeBRepDS_FaceEdgeInterference)::DownCast(Intf);
      if (FEI.IsNull()) {
        it.Next();
        continue;
      }
      Standard_Boolean GB = FEI->GBound();
      if (GB != 1) {
        it.Next();
        continue;
      }
      LGb1.Append(Intf);
      LII.Remove(it);
    }//it(LII)
    Standard_Integer nGb1 = LGb1.Extent();
    if (nGb1 == 0) continue;

    TopOpeBRepDS_ListOfInterference LGb0; // LGb1={FEIGb1(EG,FS)} -> LGb0={FEIGb0(Esd,FS)}
    it.Initialize(LGb1);
    while (it.More()) {
      Handle(TopOpeBRepDS_FaceEdgeInterference) IGb1 = Handle(TopOpeBRepDS_FaceEdgeInterference)::DownCast(it.Value());
      Standard_Integer S = IGb1->Support(); const TopoDS_Face& FS = TopoDS::Face(BDS.Shape(S));
      Standard_Integer G = IGb1->Geometry();
      Standard_Integer Gsd; Standard_Boolean findSD = TopOpeBRepDS_TOOL::GetEsd(HDS,FS,G,Gsd);
      if (!findSD) {it.Next(); continue;}

      // IGb0 is already stored in the list of interferences :
      TopOpeBRepDS_ListIteratorOfListOfInterference itt(LII); Standard_Boolean stored = Standard_False;
      for (; itt.More(); itt.Next()){
	const Handle(TopOpeBRepDS_Interference)& II = itt.Value();
	Standard_Boolean isfound = (II->Support() == S)&&(II->Geometry() == Gsd);
	if (isfound) {stored = Standard_True; break;}
      }//itt(LII)      
      if (stored) {LGb1.Remove(it); continue;}

      TopOpeBRepDS_Transition newT = IGb1->Transition();
      TopAbs_Orientation newO = newT.Orientation(TopAbs_IN);
      if (M_INTERNAL(newO) || M_EXTERNAL(newO)) {
	// nothing's done
      }
      else {
	Standard_Integer conf; Standard_Boolean ok = TopOpeBRepDS_TOOL::GetConfig(HDS,MEspON,G,Gsd,conf);
	if (!ok) {it.Next(); continue;}
	if (conf == DIFFORIENTED) newO = TopAbs::Complement(newO);
      }
#ifdef DEB
      if (trc) {cout<<"**FUN_ds_FEIGb1TO0 : IGb1";IGb1->Dump(cout);cout<<" ->";}
#endif  
      newT.Set(newO);
      IGb1->SetGeometry(Gsd); IGb1->SetGBound(Standard_False); IGb1->Transition(newT);
#ifdef DEB
      if (trc) {IGb1->Dump(cout);cout<<endl;}
#endif  
      LGb0.Append(IGb1); LGb1.Remove(it);      
    }//it(LGb1)
    
    if (LGb0.IsEmpty()) continue;
    TopOpeBRepDS_ListOfInterference& newLI = BDS.ChangeShapeInterferences(F);
    newLI.Clear();
    newLI.Append(LII); newLI.Append(LGb1); newLI.Append(LGb0);
  }//i=1..ns  
}//FUN_ds_FEIGb1TO0

// ----------------------------------------------------------------------
Standard_EXPORT void FUN_ds_complete1dForSESDM(const Handle(TopOpeBRepDS_HDataStructure)& HDS)
// ----------------------------------------------------------------------
// MSV 25.03.2002 : OCC251
// purpose : SE Section edge, SDM with Esd, SE has no interference
//   for one of vertices of Esd while should.
{
  TopOpeBRepDS_DataStructure& BDS = HDS->ChangeDS();
  Standard_Integer nse = BDS.NbSectionEdges();  

  for (Standard_Integer is = 1; is <= nse; is++) {
    const TopoDS_Edge& SE = BDS.SectionEdge(is);
    if (BRep_Tool::Degenerated(SE)) continue;
    Standard_Integer rkSE = BDS.AncestorRank(SE);
    Standard_Integer iSE = BDS.Shape(SE);   
    Standard_Boolean hsd = HDS->HasSameDomain(SE);
    if (!hsd) continue;
    const TopTools_ListOfShape& LEsd = BDS.ShapeSameDomain(SE);
    if (LEsd.IsEmpty()) continue;

    Standard_Real tolSE = BRep_Tool::Tolerance(SE);
    // map of vertices of SE or same domain with them
    TopTools_MapOfShape aGBMap;
    TopoDS_Vertex VSE[2];
    TopExp::Vertices(SE,VSE[0],VSE[1]);
    Standard_Integer i;
    for (i=0; i < 2; i++)
      if (!VSE[i].IsNull()) {
        aGBMap.Add(VSE[i]);
        const TopTools_ListOfShape& LV = BDS.ShapeSameDomain(VSE[i]);
        TopTools_ListIteratorOfListOfShape it(LV);
        for (; it.More(); it.Next())
          aGBMap.Add(it.Value());
      }

    TopTools_ListIteratorOfListOfShape ite(LEsd);
    for (; ite.More(); ite.Next()){
      const TopoDS_Edge& Esd = TopoDS::Edge(ite.Value());
      Standard_Integer iEsd = BDS.Shape(Esd);
      Standard_Integer rkEsd = BDS.AncestorRank(Esd);
      if (rkEsd == rkSE) continue;

      if (BRep_Tool::Degenerated(Esd)) continue;
      Standard_Boolean isSO;
      Standard_Boolean ok = FUN_tool_curvesSO(Esd,SE,isSO);
      if (!ok) continue;

      Standard_Real tolEsd = Max (BRep_Tool::Tolerance(Esd), tolSE);
      // prepare the list of interferences of SE with Esd
      const TopOpeBRepDS_ListOfInterference& LIall = BDS.ShapeInterferences(iSE);
      TopOpeBRepDS_ListOfInterference LI,LI1;
      FDS_assign(LIall,LI);
      Standard_Integer ni = FUN_selectTRAUNKinterference(LI,LI1);
      LI1.Clear(); ni = FUN_selectTRASHAinterference(LI,TopAbs_EDGE,LI1);
      LI.Clear(); ni = FUN_selectITRASHAinterference(LI1,iEsd,LI);
      LI1.Clear(); ni = FUN_selectSKinterference(LI,TopOpeBRepDS_EDGE,LI1);
      LI.Clear(); ni = FUN_selectSIinterference(LI1,iEsd,LI);
      LI1.Clear(); ni = FUN_selectGKinterference(LI,TopOpeBRepDS_VERTEX,LI1);
      LI.Clear(); LI.Append(LI1);

      // process vertices of Esd
      TopoDS_Vertex Vsd[2];
      TopExp::Vertices(Esd,Vsd[0],Vsd[1]);
      for (i=0; i < 2; i++) {
        const TopoDS_Vertex& aV = Vsd[i];
        if (aV.IsNull()) continue;
        // do not create interferences on GBound
        if (aGBMap.Contains(aV)) continue;

        TopAbs_Orientation ori = aV.Orientation();
        if (!isSO) ori = TopAbs::Reverse(ori);

        // check that SE has no yet interference with geometry aV oriented ori
        if (ni) {
          TopOpeBRepDS_ListOfInterference LI2;
          FDS_assign(LI,LI1);
          Standard_Integer nio = FUN_selectTRAORIinterference(LI1,ori,LI2);
          if (nio) {
            TopTools_MapOfShape aVGMap;
            aVGMap.Add(aV);
            const TopTools_ListOfShape& LV = BDS.ShapeSameDomain(aV);
            TopTools_ListIteratorOfListOfShape it(LV);
            for (; it.More(); it.Next())
              aVGMap.Add(it.Value());
            TopOpeBRepDS_ListIteratorOfListOfInterference iti(LI2);
            for (; iti.More(); iti.Next()) {
              const Handle(TopOpeBRepDS_Interference)& I1 = iti.Value();
              Standard_Integer gi = I1->Geometry();
              const TopoDS_Shape& aVG = BDS.Shape(gi);
              if (aVGMap.Contains(aVG)) break;
            }
            if (iti.More()) continue; // has already
          }
        }

        // make new interference
        Standard_Real par;
        Standard_Real tol = Max (BRep_Tool::Tolerance(aV), tolEsd);
        Standard_Real parEsd = BRep_Tool::Parameter(aV,Esd);
        ok = FUN_tool_parE (Esd,parEsd,SE,par,tol);
        if (!ok) continue;
        TopOpeBRepDS_Transition aT(ori);
        aT.ShapeBefore(TopAbs_EDGE); aT.ShapeAfter(TopAbs_EDGE);
        aT.Index(iEsd);
        Standard_Integer iV = BDS.AddShape(aV,rkEsd);
        Standard_Boolean isGBound = Standard_False;
        TopOpeBRepDS_Config aConfig = (isSO
                                       ? TopOpeBRepDS_SAMEORIENTED
                                       : TopOpeBRepDS_DIFFORIENTED);
        Handle(TopOpeBRepDS_Interference) aI = 
          TopOpeBRepDS_InterferenceTool::MakeEdgeVertexInterference
            (aT,iEsd,iV,isGBound,aConfig,par);
        HDS->StoreInterference(aI,SE);
      }
    }
  }
}