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PR: synchro V6_main tag mergeto_V7_main_11Feb13
[modules/geom.git] / src / GEOMImpl / GEOMImpl_PipeDriver.cxx
index 54b81eddc60329ebb70230f06731c275844702c4..9812da16af8b6518df08ad6fb722c75c6fe71e5c 100644 (file)
+// Copyright (C) 2007-2012  CEA/DEN, EDF R&D, OPEN CASCADE
+//
+// Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
 
-using namespace std;
-#include "GEOMImpl_PipeDriver.hxx"
-#include "GEOMImpl_IPipe.hxx"
-#include "GEOMImpl_Types.hxx"
-#include "GEOM_Function.hxx"
+#include <GEOMImpl_PipeDriver.hxx>
+
+#include <GEOMImpl_IPipeDiffSect.hxx>
+#include <GEOMImpl_IPipeShellSect.hxx>
+#include <GEOMImpl_IPipeBiNormal.hxx>
+#include <GEOMImpl_IPipe.hxx>
+#include <GEOMImpl_IPipePath.hxx>
+#include <GEOMImpl_GlueDriver.hxx>
+#include <GEOMImpl_Types.hxx>
+
+#include <GEOM_Function.hxx>
+
+#include <GEOMUtils.hxx>
+
+#include <ShapeAnalysis_FreeBounds.hxx>
+#include <ShapeAnalysis_Edge.hxx>
+#include <ShapeFix_Face.hxx>
+#include <ShapeFix_Shell.hxx>
+#include <ShapeFix_Shape.hxx>
+#include <ShapeFix_ShapeTolerance.hxx>
 
 #include <BRep_Tool.hxx>
+#include <BRep_Builder.hxx>
+#include <BRepBuilderAPI_Copy.hxx>
+#include <BRepBuilderAPI_MakeFace.hxx>
+#include <BRepBuilderAPI_MakeWire.hxx>
+#include <BRepBuilderAPI_Sewing.hxx>
 #include <BRepCheck_Analyzer.hxx>
+#include <BRepGProp.hxx>
 #include <BRepOffsetAPI_MakePipe.hxx>
-#include <BRepBuilderAPI_MakeWire.hxx>
+#include <BRepOffsetAPI_MakePipeShell.hxx>
 
 #include <TopAbs.hxx>
+#include <TopExp.hxx>
+#include <TopExp_Explorer.hxx>
 #include <TopoDS.hxx>
 #include <TopoDS_Wire.hxx>
 #include <TopoDS_Edge.hxx>
 #include <TopoDS_Shape.hxx>
+#include <TopoDS_Solid.hxx>
+#include <TopoDS_Shell.hxx>
+#include <TopoDS_Face.hxx>
+#include <TopoDS_Compound.hxx>
+#include <TopTools_SequenceOfShape.hxx>
+#include <TopTools_HSequenceOfShape.hxx>
+#include <TopTools_IndexedDataMapOfShapeShape.hxx>
+#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
+#include <TopTools_ListIteratorOfListOfShape.hxx>
+
+#include <GProp_GProps.hxx>
+
+#include <GeomAPI_ProjectPointOnCurve.hxx>
+#include <GeomAPI_Interpolate.hxx>
+#include <Geom_TrimmedCurve.hxx>
+#include <Geom_Plane.hxx>
+#include <Geom_RectangularTrimmedSurface.hxx>
+#include <Geom_BezierSurface.hxx>
+#include <Geom_Line.hxx>
+#include <Geom_Conic.hxx>
+#include <Geom_BSplineCurve.hxx>
+#include <Geom_BSplineSurface.hxx>
+#include <GeomFill_BSplineCurves.hxx>
+#include <GeomConvert_ApproxCurve.hxx>
+#include <GeomConvert.hxx>
+
+#include <TColgp_SequenceOfPnt.hxx>
+#include <TColgp_HArray1OfPnt.hxx>
+#include <TColgp_Array2OfPnt.hxx>
+#include <TColStd_HSequenceOfTransient.hxx>
+
+#include <Precision.hxx>
 
 #include <Standard_NullObject.hxx>
 #include <Standard_TypeMismatch.hxx>
 #include <Standard_ConstructionError.hxx>
 
+#include "utilities.h"
+
+//////////////////////////////////////////////////////////////////////////
+// Uncomment below macro to perform gluing in the end of MakePipe operation
+// as fix of issue 0020207.
+//////////////////////////////////////////////////////////////////////////
+//#define GLUE_0020207
+
+
 //=======================================================================
 //function : GetID
 //purpose  :
 //=======================================================================
 const Standard_GUID& GEOMImpl_PipeDriver::GetID()
 {
-  static Standard_GUID aPipeDriver("FF1BBB19-5D14-4df2-980B-3A668264EA16");
+  static Standard_GUID aPipeDriver ("FF1BBB19-5D14-4df2-980B-3A668264EA16");
   return aPipeDriver;
 }
 
-
 //=======================================================================
 //function : GEOMImpl_PipeDriver
 //purpose  :
@@ -39,84 +122,2411 @@ GEOMImpl_PipeDriver::GEOMImpl_PipeDriver()
 {
 }
 
+//=======================================================================
+//function : FillForOtherEdges
+//purpose  : auxilary for CreatePipeForShellSections()
+//=======================================================================
+static bool FillForOtherEdges(const TopoDS_Shape& F1,
+                              const TopoDS_Shape& E1,
+                              const TopoDS_Shape& V1,
+                              TopTools_IndexedDataMapOfShapeShape& FF)
+{
+  //cout<<"FillForOtherEdges"<<endl;
+  // find other pairs for vertexes and edges
+  // creating map of vertex edges for both faces
+  TopTools_IndexedDataMapOfShapeListOfShape aMapVertEdge1;
+  TopExp::MapShapesAndAncestors(F1, TopAbs_VERTEX, TopAbs_EDGE, aMapVertEdge1);
+  if (!FF.Contains(F1))
+    MESSAGE("    FillForOtherEdges: map FF not contains key F1");
+  if (!FF.Contains(E1))
+    MESSAGE("    FillForOtherEdges: map FF not contains key E1");
+  if (!FF.Contains(V1))
+    MESSAGE("    FillForOtherEdges: map FF not contains key V1");
+  const TopoDS_Shape& F2 = FF.FindFromKey(F1);
+  const TopoDS_Shape& E2 = FF.FindFromKey(E1);
+  const TopoDS_Shape& V2 = FF.FindFromKey(V1);
+  TopTools_IndexedDataMapOfShapeListOfShape aMapVertEdge2;
+  TopExp::MapShapesAndAncestors(F2, TopAbs_VERTEX, TopAbs_EDGE, aMapVertEdge2);
+
+  TopoDS_Edge ES1 = TopoDS::Edge(E1);
+  TopoDS_Edge ES2 = TopoDS::Edge(E2);
+  TopoDS_Shape VS1 = V1;
+  TopoDS_Shape VS2 = V2;
+
+  ShapeAnalysis_Edge sae;
+  while(1) {
+    if (!aMapVertEdge1.Contains(VS1))
+      MESSAGE ("    FillForOtherEdges: map aMapVertEdge1 not contains key VS1");
+    const TopTools_ListOfShape& aList1 = aMapVertEdge1.FindFromKey(VS1);
+    //TopoDS_Shape E1next;
+    TopTools_ListIteratorOfListOfShape anIter1(aList1);
+    if (anIter1.Value().IsSame(ES1)) {
+      anIter1.Next();
+    }
+    //E1next = anIter1.Value();
+    if (!aMapVertEdge2.Contains(VS2))
+      MESSAGE ("    FillForOtherEdges: map aMapVertEdge2 not contains key VS2");
+    const TopTools_ListOfShape& aList2 = aMapVertEdge2.FindFromKey(VS2);
+    //TopoDS_Shape E2next;
+    TopTools_ListIteratorOfListOfShape anIter2(aList2);
+    if (anIter2.Value().IsSame(ES2)) {
+      anIter2.Next();
+    }
+    //E2next = anIter2.Value();
+    //ES1 = TopoDS::Edge(E1next);
+    //ES2 = TopoDS::Edge(E2next);
+    ES1 = TopoDS::Edge(anIter1.Value());
+    ES2 = TopoDS::Edge(anIter2.Value());
+    if (!FF.Contains(ES1)) {
+      FF.Add(ES1,ES2);
+    }
+    if (VS1.IsSame(sae.FirstVertex(ES1)))
+      VS1 = sae.LastVertex(ES1);
+    else
+      VS1 = sae.FirstVertex(ES1);
+    if (VS2.IsSame(sae.FirstVertex(ES2)))
+      VS2 = sae.LastVertex(ES2);
+    else
+      VS2 = sae.FirstVertex(ES2);
+    if (VS1.IsSame(V1))
+      break;
+    if (!FF.Contains(VS1)) {
+      FF.Add(VS1,VS2);
+    }
+  }
+
+  return true;
+}
+
+//=======================================================================
+//function : FillCorrespondingEdges
+//purpose  : auxilary for CreatePipeForShellSections()
+//=======================================================================
+static bool FillCorrespondingEdges(const TopoDS_Shape& FS1,
+                                   const TopoDS_Shape& FS2,
+                                   const TopoDS_Vertex& aLoc1,
+                                   const TopoDS_Vertex& aLoc2,
+                                   const TopoDS_Wire& aWirePath,
+                                   TopTools_IndexedDataMapOfShapeShape& FF)
+{
+  //cout<<"FillCorrespondingEdges"<<endl;
+  // find corresponding edges
+  TopExp_Explorer expw1(FS1,TopAbs_WIRE);
+  TopoDS_Wire aWire1 = TopoDS::Wire(expw1.Current());
+  //exp = TopExp_Explorer(FS2,TopAbs_WIRE);
+  TopExp_Explorer expw2(FS2,TopAbs_WIRE);
+  TopoDS_Wire aWire2 = TopoDS::Wire(expw2.Current());
+  BRepOffsetAPI_MakePipeShell aBuilder(aWirePath);
+  aBuilder.Add(aWire1, aLoc1);
+  aBuilder.Add(aWire2, aLoc2);
+  if (!aBuilder.IsReady()) {
+    return false;
+  }
+  aBuilder.Build();
+  TopoDS_Shape aShape = aBuilder.Shape();
+  /*
+  TopoDS_Compound C;
+  BRep_Builder B;
+  B.MakeCompound(C);
+  B.Add(C,aShape);
+  B.Add(C,FS1);
+  B.Add(C,FS2);
+  BRepTools::Write(C,"/dn02/users_Linux/skl/work/Bugs/14857/comp.brep");
+  */
+  ShapeAnalysis_Edge sae;
+  double tol = Max(BRep_Tool::Tolerance(TopoDS::Face(FS1)),
+                    BRep_Tool::Tolerance(TopoDS::Face(FS2)));
+  TopTools_MapOfShape Vs1,Vs2;
+  TopExp_Explorer exp;
+  exp.Init(FS1, TopAbs_EDGE);
+  TopoDS_Edge E1 = TopoDS::Edge(exp.Current());
+  TopoDS_Vertex V11 = sae.FirstVertex(E1);
+  TopoDS_Vertex V21 = sae.LastVertex(E1);
+  gp_Pnt P11 = BRep_Tool::Pnt(V11);
+  gp_Pnt P21 = BRep_Tool::Pnt(V21);
+  //cout<<"P11("<<P11.X()<<","<<P11.Y()<<","<<P11.Z()<<")"<<endl;
+  //cout<<"P21("<<P21.X()<<","<<P21.Y()<<","<<P21.Z()<<")"<<endl;
+  // find corresponding vertexes from created shape
+  TopoDS_Vertex VN11,VN21;
+  for (exp.Init(aShape, TopAbs_VERTEX); exp.More(); exp.Next()) {
+    TopoDS_Vertex V = TopoDS::Vertex(exp.Current());
+    gp_Pnt P = BRep_Tool::Pnt(V);
+    if (P.Distance(P11)<tol) {
+      VN11 = V;
+    }
+    if (P.Distance(P21)<tol) {
+      VN21 = V;
+    }
+  }
+  // find edge contains VN11 and VN21 and corresponding vertexes
+  TopoDS_Vertex VN12,VN22;
+  for (exp.Init(aShape, TopAbs_FACE); exp.More(); exp.Next()) {
+    TopoDS_Shape F = exp.Current();
+    TopExp_Explorer expe;
+    bool IsFind = false;
+    for (expe.Init(F, TopAbs_EDGE); expe.More(); expe.Next()) {
+      TopoDS_Edge E = TopoDS::Edge(expe.Current());
+      TopoDS_Vertex VF = sae.FirstVertex(E);
+      TopoDS_Vertex VL = sae.LastVertex(E);
+      if ((VF.IsSame(VN11) && VL.IsSame(VN21)) || (VF.IsSame(VN21) && VL.IsSame(VN11))) {
+        IsFind = true;
+        break;
+      }
+    }
+    if (IsFind) {
+      for (expe.Init(F, TopAbs_EDGE); expe.More(); expe.Next()) {
+        TopoDS_Edge E = TopoDS::Edge(expe.Current());
+        TopoDS_Vertex VF = sae.FirstVertex(E);
+        TopoDS_Vertex VL = sae.LastVertex(E);
+        if (VF.IsSame(VN11) && !VL.IsSame(VN21))
+          VN12 = VL;
+        if (VL.IsSame(VN11) && !VF.IsSame(VN21))
+          VN12 = VF;
+        if (VF.IsSame(VN21) && !VL.IsSame(VN11))
+          VN22 = VL;
+        if (VL.IsSame(VN21) && !VF.IsSame(VN11))
+          VN22 = VF;
+      }
+      break;
+    }
+  }
+  // find vertexes from FS2 corresponded to VN12 and VN22
+  // and find edge from FS2 contains V12 and V22,
+  // this edge will be corresponded to edge E1
+  TopoDS_Vertex V12,V22;
+  gp_Pnt PN12 = BRep_Tool::Pnt(VN12);
+  gp_Pnt PN22 = BRep_Tool::Pnt(VN22);
+  //cout<<"PN12("<<PN12.X()<<","<<PN12.Y()<<","<<PN12.Z()<<")"<<endl;
+  //cout<<"PN22("<<PN22.X()<<","<<PN22.Y()<<","<<PN22.Z()<<")"<<endl;
+  TopoDS_Edge E2;
+  TopExp_Explorer expe;
+  for (expe.Init(FS2, TopAbs_EDGE); expe.More(); expe.Next()) {
+    TopoDS_Edge E = TopoDS::Edge(expe.Current());
+    TopoDS_Vertex VF = sae.FirstVertex(E);
+    TopoDS_Vertex VL = sae.LastVertex(E);
+    gp_Pnt PF = BRep_Tool::Pnt(VF);
+    gp_Pnt PL = BRep_Tool::Pnt(VL);
+    if (PF.Distance(PN12)<tol && PL.Distance(PN22)<tol) {
+      V12 = VF;
+      V22 = VL;
+      E2 = E;
+      break;
+    }
+    if (PF.Distance(PN22)<tol && PL.Distance(PN12)<tol) {
+      V12 = VL;
+      V22 = VF;
+      E2 = E;
+      break;
+    }
+  }
+  FF.Add(V11,V12);
+  FF.Add(V21,V22);
+  FF.Add(E1,E2);
+
+  // find other pairs for vertexes and edges
+  // creating map of vertex edges for both faces
+  return FillForOtherEdges(FS1,E1,V21,FF);
+
+  //return true;
+}
+
+//=======================================================================
+//function : FillCorrespondingEdges
+//purpose  : auxilary for CreatePipeShellsWithoutPath()
+//=======================================================================
+static bool FillCorrespondingEdges(const TopoDS_Shape& FS1,
+                                   const TopoDS_Shape& FS2,
+                                   const TopoDS_Vertex& aLoc1,
+                                   const TopoDS_Vertex& aLoc2,
+                                   TopTools_IndexedDataMapOfShapeShape& FF)
+{
+  //cout<<"FillCorrespondingEdges"<<endl;
+
+  gp_Pnt P1 = BRep_Tool::Pnt(aLoc1);
+  gp_Pnt P2 = BRep_Tool::Pnt(aLoc2);
+  gp_Vec aDir(P1,P2);
+
+  ShapeAnalysis_Edge sae;
+  double tol = Max(BRep_Tool::Tolerance(TopoDS::Face(FS1)),
+                    BRep_Tool::Tolerance(TopoDS::Face(FS2)));
+  TopTools_MapOfShape Vs1,Vs2;
+
+  TopoDS_Vertex V11=aLoc1, V12=aLoc2, V21, V22;
+  TopoDS_Edge E1,E2;
+
+  TopExp_Explorer exp1;
+  for (exp1.Init(FS1,TopAbs_EDGE); exp1.More(); exp1.Next()) {
+    E1 = TopoDS::Edge(exp1.Current());
+    TopoDS_Vertex V1 = sae.FirstVertex(E1);
+    TopoDS_Vertex V2 = sae.LastVertex(E1);
+    gp_Pnt Ptmp1 = BRep_Tool::Pnt(V1);
+    gp_Pnt Ptmp2 = BRep_Tool::Pnt(V2);
+    //cout<<"P11("<<P11.X()<<","<<P11.Y()<<","<<P11.Z()<<")"<<endl;
+    //cout<<"P21("<<P21.X()<<","<<P21.Y()<<","<<P21.Z()<<")"<<endl;
+    if (P1.Distance(Ptmp1)<tol) {
+      V21 = V2;
+      break;
+    }
+    if (P1.Distance(Ptmp2)<tol) {
+      V21 = V1;
+      break;
+    }
+  }
+
+  TopoDS_Edge E21,E22;
+  TopoDS_Vertex VE21,VE22;
+  int nbe=0;
+  for (exp1.Init(FS2,TopAbs_EDGE); exp1.More() && nbe<2; exp1.Next()) {
+    TopoDS_Edge E = TopoDS::Edge(exp1.Current());
+    TopoDS_Vertex V1 = sae.FirstVertex(E);
+    TopoDS_Vertex V2 = sae.LastVertex(E);
+    gp_Pnt Ptmp1 = BRep_Tool::Pnt(V1);
+    gp_Pnt Ptmp2 = BRep_Tool::Pnt(V2);
+    if (P2.Distance(Ptmp1)<tol) {
+      if (nbe==0) {
+        E21 = E;
+        VE21 = V2;
+        nbe++;
+      }
+      else if (nbe==1) {
+        E22 = E;
+        VE22 = V2;
+        nbe++;
+      }
+    }
+    if (P2.Distance(Ptmp2)<tol) {
+      if (nbe==0) {
+        E21 = E;
+        VE21 = V1;
+        nbe++;
+      }
+      else if (nbe==1) {
+        E22 = E;
+        VE22 = V1;
+        nbe++;
+      }
+    }
+  }
+
+  gp_Pnt PV21 = BRep_Tool::Pnt(V21);
+  gp_Pnt PE21 = BRep_Tool::Pnt(VE21);
+  gp_Pnt PE22 = BRep_Tool::Pnt(VE22);
+  gp_Vec aDir1(PV21,PE21);
+  gp_Vec aDir2(PV21,PE22);
+  double ang1 = aDir.Angle(aDir1);
+  double ang2 = aDir.Angle(aDir2);
+  if (fabs(ang1)<fabs(ang2)) {
+    E2 = E21;
+    V22 = VE21;
+  }
+  else {
+    E2 = E22;
+    V22 = VE22;
+  }
+
+  FF.Add(V11,V12);
+  FF.Add(V21,V22);
+  FF.Add(E1,E2);
+
+  // find other pairs for vertexes and edges
+  return FillForOtherEdges(FS1,E1,V21,FF);
+}
+
+//=======================================================================
+//function : FindNextPairOfFaces
+//purpose  : auxilary for CreatePipeForShellSections()
+//=======================================================================
+static void FindNextPairOfFaces(const TopoDS_Shape& aCurFace,
+                                TopTools_IndexedDataMapOfShapeListOfShape& aMapEdgeFaces1,
+                                TopTools_IndexedDataMapOfShapeListOfShape& aMapEdgeFaces2,
+                                TopTools_IndexedDataMapOfShapeShape& FF,
+                                GEOMImpl_IPipe* aCI)
+{
+  //cout<<"FindNextPairOfFaces"<<endl;
+  TopExp_Explorer anExp;
+  for (anExp.Init(aCurFace, TopAbs_EDGE); anExp.More(); anExp.Next()) {
+    TopoDS_Shape E1 = anExp.Current();
+    if (!FF.Contains(E1)) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("FindNextPairOfFaces: Can not find edge in map");
+    }
+    if (!FF.Contains(E1))
+      MESSAGE ("    FindNextPairOfFaces: map FF not contains key E1");
+    const TopoDS_Shape& E2 = FF.FindFromKey(E1);
+    TopExp_Explorer anExpV;
+    anExpV.Init(E1, TopAbs_VERTEX);
+    TopoDS_Shape V1 = anExpV.Current();
+    if (!FF.Contains(V1)) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("FindNextPairOfFaces: Can not find vertex in map");
+    }
+
+    if (!aMapEdgeFaces1.Contains(E1))
+      MESSAGE ("    FindNextPairOfFaces: map aMapEdgeFaces1 not contains key E1");
+    const TopTools_ListOfShape& aList1 = aMapEdgeFaces1.FindFromKey(E1);
+    if (aList1.Extent()<2)
+      continue;
+    TopTools_ListIteratorOfListOfShape anIter(aList1);
+    if (anIter.Value().IsEqual(aCurFace)) {
+      anIter.Next();
+    }
+    TopoDS_Shape F1other = anIter.Value();
+    if (FF.Contains(F1other))
+      continue;
+
+    if (!FF.Contains(aCurFace))
+      MESSAGE ("    FindNextPairOfFaces: map FF not contains key aCurFace");
+    const TopoDS_Shape& F2 = FF.FindFromKey(aCurFace);
+    if (!aMapEdgeFaces2.Contains(E2))
+      MESSAGE ("    FindNextPairOfFaces: map aMapEdgeFaces2 not contains key E2");
+    const TopTools_ListOfShape& aList2 = aMapEdgeFaces2.FindFromKey(E2);
+    if (aList2.Extent()<2) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("FindNextPairOfFaces: Can not find corresponding face");
+    }
+    TopTools_ListIteratorOfListOfShape anIter2(aList2);
+    if (anIter2.Value().IsEqual(F2)) {
+      anIter2.Next();
+    }
+    TopoDS_Shape F2other = anIter2.Value();
+    FF.Add(F1other,F2other);
+
+    // add pairs of edges to FF
+    bool stat =  FillForOtherEdges(F1other,E1,V1,FF);
+    if (!stat) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("FindNextPairOfFaces: Can not mapping other egdes");
+    }
+
+    FindNextPairOfFaces(F1other, aMapEdgeFaces1, aMapEdgeFaces2, FF, aCI);
+  }
+}
+
+//=======================================================================
+//function : FindFirstPairFaces
+//purpose  : auxilary for Execute()
+//=======================================================================
+static void FindFirstPairFaces(const TopoDS_Shape& S1, const TopoDS_Shape& S2,
+                               TopoDS_Vertex& V1, TopoDS_Vertex& V2,
+                               TopoDS_Shape& FS1, TopoDS_Shape& FS2)
+{
+  //cout<<"FindFirstPairFaces"<<endl;
+
+  // check if vertexes are sub-shapes of sections
+  gp_Pnt P1 = BRep_Tool::Pnt(V1);
+  gp_Pnt P2 = BRep_Tool::Pnt(V2);
+  TopoDS_Vertex V1new,V2new;
+  TopExp_Explorer exp;
+  double mindist = 1.e10;
+  for (exp.Init(S1, TopAbs_VERTEX); exp.More(); exp.Next()) {
+    TopoDS_Vertex V = TopoDS::Vertex(exp.Current());
+    gp_Pnt P = BRep_Tool::Pnt(V);
+    double dist = P1.Distance(P);
+    if (dist<mindist) {
+      mindist = dist;
+      V1new = V;
+    }
+  }
+  mindist = 1.e10;
+  for (exp.Init(S2, TopAbs_VERTEX); exp.More(); exp.Next()) {
+    TopoDS_Vertex V = TopoDS::Vertex(exp.Current());
+    gp_Pnt P = BRep_Tool::Pnt(V);
+    double dist = P2.Distance(P);
+    if (dist<mindist) {
+      mindist = dist;
+      V2new = V;
+    }
+  }
+
+  //gp_Pnt P1new = BRep_Tool::Pnt(V1new);
+  //gp_Pnt P2new = BRep_Tool::Pnt(V2new);
+  //cout<<"  P1("<<P1.X()<<","<<P1.Y()<<","<<P1.Z()<<")"<<endl;
+  //cout<<"  P2("<<P2.X()<<","<<P2.Y()<<","<<P2.Z()<<")"<<endl;
+  //cout<<"  P1new("<<P1new.X()<<","<<P1new.Y()<<","<<P1new.Z()<<")"<<endl;
+  //cout<<"  P2new("<<P2new.X()<<","<<P2new.Y()<<","<<P2new.Z()<<")"<<endl;
+
+  // replace vertexes if it is needed
+  if (!V1.IsSame(V1new)) {
+    V1 = V1new;
+    P1 = BRep_Tool::Pnt(V1);
+    MESSAGE ("  replace V1");
+  }
+  else
+    MESSAGE ("  not replace V1");
+  if (!V2.IsSame(V2new)) {
+    V2 = V2new;
+    P2 = BRep_Tool::Pnt(V2);
+    MESSAGE ("  replace V2");
+  }
+  else
+    MESSAGE ("  not replace V2");
+
+  TopTools_IndexedDataMapOfShapeListOfShape aMapVertFaces1;
+  TopExp::MapShapesAndAncestors(S1, TopAbs_VERTEX, TopAbs_FACE, aMapVertFaces1);
+  TopTools_IndexedDataMapOfShapeListOfShape aMapVertFaces2;
+  TopExp::MapShapesAndAncestors(S2, TopAbs_VERTEX, TopAbs_FACE, aMapVertFaces2);
+
+  if (!aMapVertFaces1.Contains(V1))
+    MESSAGE ("    FindFirstPairFaces: map aMapVertFaces1 not contains key V1");
+  const TopTools_ListOfShape& aList1 = aMapVertFaces1.FindFromKey(V1);
+  TopTools_ListIteratorOfListOfShape anIter1(aList1);
+  FS1 = anIter1.Value();
+  // find middle point
+  double x1=0., y1=0., z1=0.;
+  int nbv1=0;
+  for (exp.Init(FS1, TopAbs_VERTEX); exp.More(); exp.Next()) {
+    TopoDS_Vertex V = TopoDS::Vertex(exp.Current());
+    gp_Pnt P = BRep_Tool::Pnt(V);
+    x1 += P.X();
+    y1 += P.Y();
+    z1 += P.Z();
+    nbv1++;
+  }
+  gp_Pnt PM1(x1/nbv1, y1/nbv1, z1/nbv1);
+
+  TColgp_SequenceOfPnt Ps;
+  TopTools_SequenceOfShape Fs;
+  if (!aMapVertFaces2.Contains(V2))
+    MESSAGE ("    FindFirstPairFaces: map aMapVertFaces2 not contains key V2");
+  const TopTools_ListOfShape& aList2 = aMapVertFaces2.FindFromKey(V2);
+  TopTools_ListIteratorOfListOfShape anIter2(aList2);
+  for (; anIter2.More(); anIter2.Next()) {
+    TopoDS_Shape F = anIter2.Value();
+    double x2=0., y2=0., z2=0.;
+    int nbv2=0;
+    for (exp.Init(F, TopAbs_VERTEX); exp.More(); exp.Next()) {
+      TopoDS_Vertex V = TopoDS::Vertex(exp.Current());
+      gp_Pnt P = BRep_Tool::Pnt(V);
+      x2 += P.X();
+      y2 += P.Y();
+      z2 += P.Z();
+      nbv2++;
+    }
+    gp_Pnt PM(x2/nbv1, y2/nbv1, z2/nbv1);
+    Fs.Append(F);
+    Ps.Append(PM);
+  }
+
+  gp_Vec aDir(P1,P2);
+  int i=1;
+  double MinAng = M_PI;
+  int numface = 0;
+  for (; i<=Fs.Length(); i++) {
+    gp_Vec tmpDir(PM1,Ps(i));
+    double ang = fabs(aDir.Angle(tmpDir));
+    if (ang<MinAng) {
+      MinAng = ang;
+      numface = i;
+    }
+  }
+  FS2 = Fs(numface);
+}
+
+//=======================================================================
+//function : CreatePipeWithDifferentSections
+//purpose  :
+//=======================================================================
+TopoDS_Shape GEOMImpl_PipeDriver::CreatePipeWithDifferentSections
+                                  (const TopoDS_Wire& theWirePath,
+                                   const Handle(TopTools_HSequenceOfShape) theHSeqBases,
+                                   const Handle(TopTools_HSequenceOfShape) theHSeqLocs,
+                                   const Standard_Boolean theWithContact,
+                                   const Standard_Boolean theWithCorrect)
+{
+  TopoDS_Shape aShape;
+
+  TopoDS_Wire aWirePath = theWirePath;
+
+  Standard_Integer nbBases = theHSeqBases->Length();
+  Standard_Integer nbLocs = (theHSeqLocs.IsNull() ? 0 : theHSeqLocs->Length());
+
+  if (nbLocs && nbLocs != nbBases) {
+    Standard_ConstructionError::Raise("Number of sections is not equal to number of locations ");
+  }
+
+  TopTools_SequenceOfShape aSeqBases;
+  TopTools_SequenceOfShape aSeqLocs;
+  TopTools_SequenceOfShape aSeqFaces;
+
+  Standard_Integer i = 1;
+  for (i = 1; i <= nbBases; i++) {
+    if (theHSeqBases->Value(i).IsNull())
+      continue;
+
+    // Make copy to prevent modifying of base object 0020766 : EDF 1320
+    TopoDS_Shape aShapeBase;
+    BRepBuilderAPI_Copy Copy (theHSeqBases->Value(i));
+    if (Copy.IsDone())
+      aShapeBase = Copy.Shape();
+
+    TopAbs_ShapeEnum aTypeBase = aShapeBase.ShapeType();
+
+    //if for section was specified face with a few wires then a few
+    //    pipes were build and make solid
+    Standard_Boolean NeedCreateSolid = Standard_False;
+    if (aTypeBase == TopAbs_SHELL) {
+      // create wire as boundary contour if shell is no closed
+      // get free boundary shapes
+      ShapeAnalysis_FreeBounds anAnalizer(aShapeBase);
+      TopoDS_Compound aClosed = anAnalizer.GetClosedWires();
+      TopExp_Explorer anExp;
+      TopoDS_Shape aWire;
+      Standard_Integer NbWires = 0;
+      for (anExp.Init(aClosed, TopAbs_WIRE); anExp.More(); anExp.Next()) {
+        NbWires++;
+        aWire = anExp.Current();
+      }
+      if (NbWires != 1) {
+        // bad case
+        Standard_ConstructionError::Raise("Bad shell is used as section ");
+      }
+      NeedCreateSolid = Standard_True;
+      aSeqFaces.Append(aShapeBase);
+      aSeqBases.Append(aWire);
+    }
+    else if (aTypeBase == TopAbs_FACE) {
+      NeedCreateSolid = Standard_True;
+      //for case one path should be used other type function
+      aSeqFaces.Append(aShapeBase);
+      TopExp_Explorer aExpW(aShapeBase,TopAbs_WIRE);
+      for (; aExpW.More(); aExpW.Next()) {
+        TopoDS_Shape aWireProf = aExpW.Current();
+        aSeqBases.Append(aWireProf);
+      }
+    }
+    else if (aTypeBase == TopAbs_WIRE || aTypeBase == TopAbs_VERTEX) {
+      aSeqBases.Append(aShapeBase);
+    }
+    else if (aTypeBase == TopAbs_EDGE) {
+      TopoDS_Edge anEdge = TopoDS::Edge(aShapeBase);
+      TopoDS_Shape aWireProf = BRepBuilderAPI_MakeWire(anEdge);
+      aSeqBases.Append(aWireProf);
+    }
+    if (nbLocs) {
+      TopoDS_Shape aShapeLoc = theHSeqLocs->Value(i);
+      if (aShapeLoc.IsNull() || aShapeLoc.ShapeType() != TopAbs_VERTEX)
+        continue;
+      aSeqLocs.Append(aShapeLoc);
+    }
+  }
+
+  nbLocs = aSeqLocs.Length();
+
+  // skl 02.05.2007
+  TopTools_SequenceOfShape Edges;
+  if (nbLocs > 0) {
+    // we have to check that each location shape is a vertex from
+    // path and update aSeqLocs if it is needed (and possible)
+    TColgp_SequenceOfPnt PLocs;
+    for (i=1; i<=nbLocs; i++) {
+      TopoDS_Vertex V = TopoDS::Vertex(aSeqLocs.Value(i));
+      PLocs.Append(BRep_Tool::Pnt(V));
+    }
+    //TopTools_SequenceOfShape Edges;
+    TopExp_Explorer anExp;
+    for (anExp.Init(aWirePath, TopAbs_EDGE); anExp.More(); anExp.Next()) {
+      Edges.Append(anExp.Current());
+    }
+    int nbEdges = Edges.Length();
+    ShapeAnalysis_Edge sae;
+    TopoDS_Edge edge = TopoDS::Edge(Edges.First());
+    double tol = BRep_Tool::Tolerance(edge);
+    TopoDS_Vertex VF = sae.FirstVertex(edge);
+    gp_Pnt PF = BRep_Tool::Pnt(VF);
+    //cout<<"PF("<<PF.X()<<","<<PF.Y()<<","<<PF.Z()<<")"<<endl;
+    if (PF.Distance(PLocs.First()) > tol) {
+      Standard_ConstructionError::Raise
+        ("First location shapes is not coincided with first vertex of aWirePath");
+    }
+    aSeqLocs.ChangeValue(1) = VF;
+    edge = TopoDS::Edge(Edges.Last());
+    tol = BRep_Tool::Tolerance(edge);
+    TopoDS_Vertex VL = sae.LastVertex(edge);
+    gp_Pnt PL = BRep_Tool::Pnt(VL);
+    if (PL.Distance(PLocs.Last()) > tol) {
+      Standard_ConstructionError::Raise
+        ("Last location shapes is not coincided with last vertex of aWirePath");
+    }
+    aSeqLocs.ChangeValue(nbLocs) = VL;
+    int jcurr = 2;
+    for (i=1; i<=Edges.Length() && jcurr<nbLocs; i++) {
+      TopoDS_Edge E = TopoDS::Edge(Edges.Value(i));
+      tol = BRep_Tool::Tolerance(edge);
+      TopoDS_Vertex V1 = sae.FirstVertex(E);
+      TopoDS_Vertex V2 = sae.LastVertex(E);
+      gp_Pnt P1 = BRep_Tool::Pnt(V1);
+      gp_Pnt P2 = BRep_Tool::Pnt(V2);
+      if (P2.Distance(PLocs.Value(jcurr)) < tol) {
+        aSeqLocs.ChangeValue(jcurr) = V2;
+        jcurr++;
+      }
+      else {
+        // find distance between E and aLocs(jcurr)
+        double fp,lp;
+        Handle(Geom_Curve) C = BRep_Tool::Curve(E,fp,lp);
+        GeomAPI_ProjectPointOnCurve PPCurve (PLocs.Value(jcurr),C);
+        if (PPCurve.NbPoints()>0 &&
+            PLocs.Value(jcurr).Distance(PPCurve.Point(1)) < tol) {
+          double param = PPCurve.Parameter(1);
+          gp_Pnt PC1;
+          C->D0(param,PC1);
+          // split current edge
+          Handle(Geom_TrimmedCurve) tc1 = new Geom_TrimmedCurve(C,fp,param);
+          Handle(Geom_TrimmedCurve) tc2 = new Geom_TrimmedCurve(C,param,lp);
+          TopoDS_Edge E1,E2;
+          BRep_Builder B;
+          gp_Pnt Pfp;
+          C->D0(fp,Pfp);
+          if (Pfp.Distance(P1)<tol) {
+            B.MakeEdge(E1,tc1,tol);
+            B.Add(E1,V1);
+            TopoDS_Shape tmpV = aSeqLocs.Value(jcurr).Oriented(TopAbs_REVERSED);
+            B.Add(E1,TopoDS::Vertex(tmpV));
+            B.MakeEdge(E2,tc2,tol);
+            tmpV = aSeqLocs.Value(jcurr).Oriented(TopAbs_FORWARD);
+            B.Add(E2,TopoDS::Vertex(tmpV));
+            B.Add(E2,V2);
+          }
+          else {
+            B.MakeEdge(E1,tc2,tol);
+            TopoDS_Shape tmpV = aSeqLocs.Value(jcurr).Oriented(TopAbs_FORWARD);
+            B.Add(E1,TopoDS::Vertex(tmpV));
+            B.Add(E1,V1);
+            E1.Reverse();
+            B.MakeEdge(E2,tc1,tol);
+            B.Add(E2,V2);
+            tmpV = aSeqLocs.Value(jcurr).Oriented(TopAbs_REVERSED);
+            B.Add(E2,TopoDS::Vertex(tmpV));
+            E2.Reverse();
+          }
+          jcurr++;
+          Edges.Remove(i);
+          Edges.InsertAfter(i-1,E1);
+          Edges.InsertAfter(i,E2);
+        }
+      }
+    }
+    if (nbEdges<Edges.Length()) {
+        // one of edges was splitted => we have to update WirePath
+        BRep_Builder B;
+        TopoDS_Wire W;
+        B.MakeWire(W);
+        for (i=1; i<=Edges.Length(); i++) {
+          B.Add(W,TopoDS::Edge(Edges.Value(i)));
+        }
+        aWirePath = W;
+    }
+  }
+
+  // check curvature of wire for condition that
+  // max summary angle between directions along
+  // wire path must be < 4*PI. If not - split wire
+  // and seguences of shapes, perform pipe for each
+  // and make sewing after that
+  double fp,lp;
+  Handle(Geom_Curve) C = BRep_Tool::Curve(TopoDS::Edge(Edges.Value(1)),fp,lp);
+  gp_Pnt P1,P2;
+  gp_Vec Vec1,Vec2;
+  C->D1(fp,P1,Vec1);
+  C->D1(lp,P2,Vec2);
+  double SumAng = fabs(Vec1.Angle(Vec2));
+  Vec1 = Vec2;
+  P1 = P2;
+  TColStd_SequenceOfInteger SplitEdgeNums,SplitLocNums;
+  int LastLoc = 1;
+  //cout<<"Edges.Length()="<<Edges.Length()<<endl;
+  for (i=2; i<=Edges.Length(); i++) {
+      TopoDS_Edge edge = TopoDS::Edge(Edges.Value(i));
+      double tol = BRep_Tool::Tolerance(edge);
+      Handle(Geom_Curve) C = BRep_Tool::Curve(edge,fp,lp);
+      C->D1(lp,P2,Vec2);
+      double ang = fabs(Vec1.Angle(Vec2));
+      SumAng += ang;
+      if (SumAng>4*M_PI) {
+        SumAng = ang;
+        SplitEdgeNums.Append(i-1);
+        int j;
+        for (j=LastLoc+1; j<=aSeqLocs.Length(); j++) {
+          TopoDS_Vertex aVert = TopoDS::Vertex(aSeqLocs.Value(j));
+          gp_Pnt P = BRep_Tool::Pnt(aVert);
+          if (P1.Distance(P) < tol) {
+            SplitLocNums.Append(j);
+            LastLoc = j;
+            break;
+          }
+        }
+      }
+      Vec1 = Vec2;
+      P1 = P2;
+  }
+
+  if (SplitLocNums.Length()==SplitEdgeNums.Length() && SplitEdgeNums.Length()>0) {
+      TopTools_SequenceOfShape aSeqRes;
+      int nn, num1 = 1, num2 = 1;
+      for (nn=1; nn<=SplitEdgeNums.Length(); nn++) {
+        // create wirepath and sequences of shapes
+        BRep_Builder B;
+        TopoDS_Wire tmpW;
+        B.MakeWire(tmpW);
+        for (i=num1; i<=SplitEdgeNums.Value(nn); i++) {
+          B.Add(tmpW,TopoDS::Edge(Edges.Value(i)));
+        }
+        num1 = SplitEdgeNums.Value(nn) + 1;
+        TopTools_SequenceOfShape aTmpSeqBases;
+        TopTools_SequenceOfShape aTmpSeqLocs;
+        for (i=num2; i<=SplitLocNums.Value(nn); i++) {
+          aTmpSeqBases.Append(aSeqBases.Value(i));
+          aTmpSeqLocs.Append(aSeqLocs.Value(i));
+        }
+        num2 = SplitLocNums.Value(nn);
+        // make pipe
+        BRepOffsetAPI_MakePipeShell aBuilder(tmpW);
+        Standard_Integer nbShapes = aTmpSeqBases.Length();
+        for (i=1; i<=nbShapes; i++) {
+          TopoDS_Shape aShapeLoc = aTmpSeqLocs.Value(i);
+          TopoDS_Vertex aVert = TopoDS::Vertex(aShapeLoc);
+          aBuilder.Add(aTmpSeqBases.Value(i), aVert, theWithContact, theWithCorrect);
+        }
+        if (!aBuilder.IsReady()) {
+          Standard_ConstructionError::Raise("Invalid input data for building PIPE: bases are invalid");
+        }
+        aBuilder.Build();
+        TopoDS_Shape resShape = aBuilder.Shape();
+        aSeqRes.Append(resShape);
+      }
+      // create wirepath and sequences of shapes for last part
+      BRep_Builder B;
+      TopoDS_Wire tmpW;
+      B.MakeWire(tmpW);
+      for (i=num1; i<=Edges.Length(); i++) {
+        B.Add(tmpW,TopoDS::Edge(Edges.Value(i)));
+      }
+      TopTools_SequenceOfShape aTmpSeqBases;
+      TopTools_SequenceOfShape aTmpSeqLocs;
+      for (i=num2; i<=aSeqLocs.Length(); i++) {
+        aTmpSeqBases.Append(aSeqBases.Value(i));
+        aTmpSeqLocs.Append(aSeqLocs.Value(i));
+      }
+      // make pipe for last part
+      BRepOffsetAPI_MakePipeShell aBuilder(tmpW);
+      Standard_Integer nbShapes = aTmpSeqBases.Length();
+      for (i=1; i<=nbShapes; i++) {
+        TopoDS_Shape aShapeLoc = aTmpSeqLocs.Value(i);
+        TopoDS_Vertex aVert = TopoDS::Vertex(aShapeLoc);
+        aBuilder.Add(aTmpSeqBases.Value(i), aVert, theWithContact, theWithCorrect);
+      }
+      if (!aBuilder.IsReady()) {
+        Standard_ConstructionError::Raise("Invalid input data for building PIPE: bases are invalid");
+      }
+      aBuilder.Build();
+      TopoDS_Shape resShape = aBuilder.Shape();
+      aSeqRes.Append(resShape);
+      // make sewing for result
+      Handle(BRepBuilderAPI_Sewing) aSewing = new BRepBuilderAPI_Sewing;
+      aSewing->SetTolerance(Precision::Confusion());
+      aSewing->SetFaceMode(Standard_True);
+      aSewing->SetFloatingEdgesMode(Standard_False);
+      aSewing->SetNonManifoldMode(Standard_False);
+      for (i=1; i<=aSeqRes.Length(); i++) {
+        aSewing->Add(aSeqRes.Value(i));
+      }
+      aSewing->Perform();
+      aShape = aSewing->SewedShape();
+  }
+  else {
+      // old implementation without splitting
+      BRepOffsetAPI_MakePipeShell aBuilder(aWirePath);
+
+      Standard_Integer nbShapes = aSeqBases.Length();
+      Standard_Integer step = nbShapes/nbBases;
+
+      if (nbShapes < nbBases || fmod((double)nbShapes, (double)nbBases)) {
+        Standard_ConstructionError::Raise("Invalid sections were specified for building pipe");
+      }
+      Standard_Integer ind =0;
+      for (i = 1; i <= nbShapes && ind < nbShapes; i++) { //i+nbBases <= nbShapes
+        TopTools_SequenceOfShape usedBases;
+        Standard_Integer j = 1;
+        for (; j <= nbBases; j++) {
+          ind = i + (j-1)*step;
+          TopoDS_Shape aWireProf = aSeqBases.Value(ind);
+          usedBases.Append(aWireProf);
+          if (nbLocs) {
+            TopoDS_Shape aShapeLoc = aSeqLocs.Value(j);
+            TopoDS_Vertex aVert = TopoDS::Vertex(aShapeLoc);
+            aBuilder.Add(aWireProf, aVert, theWithContact, theWithCorrect);
+          }
+          else
+            aBuilder.Add(aWireProf, theWithContact, theWithCorrect);
+        }
+        if (!aBuilder.IsReady()) {
+          Standard_ConstructionError::Raise("Invalid input data for building PIPE: bases are invalid");
+        }
+        aBuilder.Build();
+        aShape = aBuilder.Shape();
+        aSeqFaces.Append(aShape);
+        for (j = 1; j <=usedBases.Length(); j++)
+          aBuilder.Delete(usedBases.Value(j));
+      }
+
+      //for case if section is face
+      if (aSeqFaces.Length() >1) {
+        BRep_Builder aB;
+        TopoDS_Compound aComp;
+        aB.MakeCompound(aComp);
+        for (i = 1; i <= aSeqFaces.Length(); i++)
+          aB.Add(aComp,aSeqFaces.Value(i));
+        aShape = aComp;
+      }
+  }
+
+  return aShape;
+}
+
+//=======================================================================
+//function : CreatePipeForShellSections
+//purpose  : auxilary for Execute()
+//=======================================================================
+static TopoDS_Shape CreatePipeForShellSections(const TopoDS_Wire& aWirePath,
+                                               GEOMImpl_IPipe* aCI)
+{
+  //cout<<"CreatePipeForShellSections"<<endl;
+  //TopoDS_Shape res;
+  int i,j;
+  BRep_Builder B;
+
+  GEOMImpl_IPipeShellSect* aCIDS = (GEOMImpl_IPipeShellSect*)aCI;
+  Handle(TColStd_HSequenceOfTransient) aBasesObjs = aCIDS->GetBases();
+  Handle(TColStd_HSequenceOfTransient) aSubBasesObjs = aCIDS->GetSubBases();
+  Handle(TColStd_HSequenceOfTransient) aLocObjs = aCIDS->GetLocations();
+  Standard_Boolean aWithContact = (aCIDS->GetWithContactMode());
+  Standard_Boolean aWithCorrect = (aCIDS->GetWithCorrectionMode());
+
+  Standard_Integer nbBases = aBasesObjs->Length(),
+    nbSubBases = (aSubBasesObjs.IsNull() ? 0 :aSubBasesObjs->Length()),
+    nbLocs = (aLocObjs.IsNull() ? 0 :aLocObjs->Length());
+
+  if (nbLocs != nbBases) {
+    if (aCI) delete aCI;
+    Standard_ConstructionError::Raise("Number of sections is not equal to number of locations ");
+  }
+  if (nbSubBases && nbSubBases != nbBases) {
+    if (aCI) delete aCI;
+    Standard_ConstructionError::Raise("Number of sections is not equal to number of subsections ");
+  }
+
+  //BRepOffsetAPI_MakePipeShell aBuilder(aWirePath);
+
+  TopTools_SequenceOfShape VLocs;
+  for (i=1; i<=nbBases; i++) {
+    Handle(Standard_Transient) anItemLoc = aLocObjs->Value(i);
+    if (anItemLoc.IsNull())
+      continue;
+    Handle(GEOM_Function) aRefLoc = Handle(GEOM_Function)::DownCast(anItemLoc);
+    TopoDS_Shape aShapeLoc = aRefLoc->GetValue();
+    if (aShapeLoc.IsNull() || aShapeLoc.ShapeType() != TopAbs_VERTEX)
+      continue;
+    VLocs.Append(aShapeLoc);
+  }
+  nbLocs = VLocs.Length();
+  if (nbLocs != nbBases) {
+    if (aCI) delete aCI;
+    Standard_ConstructionError::Raise("One of location shapes is not a vertex");
+  }
+  // split wire path by location points
+  TColgp_SequenceOfPnt PLocs;
+  for (i=1; i<=nbLocs; i++) {
+    TopoDS_Vertex V = TopoDS::Vertex(VLocs.Value(i));
+    PLocs.Append(BRep_Tool::Pnt(V));
+  }
+
+  TopTools_SequenceOfShape Edges;
+  TopTools_SequenceOfShape Wires;
+  ShapeAnalysis_Edge sae;
+
+  if (nbLocs==2) {
+    TopExp_Explorer anExp;
+    for (anExp.Init(aWirePath, TopAbs_EDGE); anExp.More(); anExp.Next()) {
+      Edges.Append(anExp.Current());
+    }
+    Standard_Integer Num1 = 0;
+    Standard_Integer Num2 = 0;
+    for (i=1; i<=Edges.Length(); i++) {
+      TopoDS_Edge E = TopoDS::Edge(Edges.Value(i));
+      double tol = BRep_Tool::Tolerance(E);
+      TopoDS_Vertex V1 = sae.FirstVertex(E);
+      TopoDS_Vertex V2 = sae.LastVertex(E);
+      gp_Pnt P1 = BRep_Tool::Pnt(V1);
+      gp_Pnt P2 = BRep_Tool::Pnt(V2);
+      if (P1.Distance(PLocs.First()) < tol) {
+        Num1 = i;
+      }
+      if (P2.Distance(PLocs.Last()) < tol) {
+        Num2 = i;
+      }
+    }
+    if (Num1>0 && Num2>0) {
+      TopoDS_Wire W;
+      B.MakeWire(W);
+      for (i=Num1; i<=Num2; i++) {
+        B.Add(W,Edges.Value(i));
+      }
+      Wires.Append(W);
+    }
+    else {
+      Wires.Append(aWirePath);
+    }
+  }
+  else {
+    TopExp_Explorer anExp;
+    for (anExp.Init(aWirePath, TopAbs_EDGE); anExp.More(); anExp.Next()) {
+      Edges.Append(anExp.Current());
+    }
+    TopoDS_Edge edge = TopoDS::Edge(Edges.First());
+    double tol = BRep_Tool::Tolerance(edge);
+    TopoDS_Vertex VF = sae.FirstVertex(edge);
+    gp_Pnt PF = BRep_Tool::Pnt(VF);
+    //cout<<"PF("<<PF.X()<<","<<PF.Y()<<","<<PF.Z()<<")"<<endl;
+    if (PF.Distance(PLocs.First()) > tol) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise
+        ("First location shapes is not coincided with first vertex of aWirePath");
+    }
+    VLocs.ChangeValue(1) = VF;
+    edge = TopoDS::Edge(Edges.Last());
+    tol = BRep_Tool::Tolerance(edge);
+    TopoDS_Vertex VL = sae.LastVertex(edge);
+    gp_Pnt PL = BRep_Tool::Pnt(VL);
+    if (PL.Distance(PLocs.Last()) > tol) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise
+        ("Last location shapes is not coincided with last vertex of aWirePath");
+    }
+    VLocs.ChangeValue(nbLocs) = VL;
+    int jcurr = 2;
+    TopTools_SequenceOfShape tmpEdges;
+    for (i=1; i<=Edges.Length() && jcurr<nbLocs; i++) {
+      TopoDS_Edge E = TopoDS::Edge(Edges.Value(i));
+      tol = BRep_Tool::Tolerance(E);
+      TopoDS_Vertex V1 = sae.FirstVertex(E);
+      TopoDS_Vertex V2 = sae.LastVertex(E);
+      gp_Pnt P1 = BRep_Tool::Pnt(V1);
+      gp_Pnt P2 = BRep_Tool::Pnt(V2);
+      if (P2.Distance(PLocs.Value(jcurr)) < tol) {
+        // make wire from current edge and add created
+        // wire to Wires
+        TopoDS_Wire W;
+        B.MakeWire(W);
+        for (j=1; j<=tmpEdges.Length(); j++)
+          B.Add(W,tmpEdges.Value(j));
+        B.Add(W,E);
+        Wires.Append(W);
+        VLocs.ChangeValue(jcurr) = V2;
+        jcurr++;
+        tmpEdges.Clear();
+      }
+      else {
+        // find distance between E and aLocs(jcurr)
+        double fp,lp;
+        Handle(Geom_Curve) C = BRep_Tool::Curve(E,fp,lp);
+        GeomAPI_ProjectPointOnCurve PPCurve (PLocs.Value(jcurr),C);
+        if (PPCurve.NbPoints()>0 &&
+            PLocs.Value(jcurr).Distance(PPCurve.Point(1)) < tol) {
+          double param = PPCurve.Parameter(1);
+          gp_Pnt PC1;
+          C->D0(param,PC1);
+          // split current edge
+          Handle(Geom_TrimmedCurve) tc1 = new Geom_TrimmedCurve(C,fp,param);
+          Handle(Geom_TrimmedCurve) tc2 = new Geom_TrimmedCurve(C,param,lp);
+          TopoDS_Edge E1,E2;
+          gp_Pnt Pfp;
+          C->D0(fp,Pfp);
+          if (Pfp.Distance(P1)<tol) {
+            B.MakeEdge(E1,tc1,tol);
+            B.Add(E1,V1);
+            TopoDS_Shape tmpV = VLocs.Value(jcurr).Oriented(TopAbs_REVERSED);
+            B.Add(E1,TopoDS::Vertex(tmpV));
+            tmpEdges.Append(E1);
+            B.MakeEdge(E2,tc2,tol);
+            tmpV = VLocs.Value(jcurr).Oriented(TopAbs_FORWARD);
+            B.Add(E2,TopoDS::Vertex(tmpV));
+            B.Add(E2,V2);
+          }
+          else {
+            B.MakeEdge(E1,tc2,tol);
+            TopoDS_Shape tmpV = VLocs.Value(jcurr).Oriented(TopAbs_FORWARD);
+            B.Add(E1,TopoDS::Vertex(tmpV));
+            B.Add(E1,V1);
+            E1.Reverse();
+            tmpEdges.Append(E1);
+            B.MakeEdge(E2,tc1,tol);
+            B.Add(E2,V2);
+            tmpV = VLocs.Value(jcurr).Oriented(TopAbs_REVERSED);
+            B.Add(E2,TopoDS::Vertex(tmpV));
+            E2.Reverse();
+          }
+          // create wire from tmpEdges
+          TopoDS_Wire W;
+          B.MakeWire(W);
+          for (j=1; j<=tmpEdges.Length(); j++)
+            B.Add(W,tmpEdges.Value(j));
+          Wires.Append(W);
+          jcurr++;
+          tmpEdges.Clear();
+          Edges.Remove(i);
+          Edges.InsertAfter(i-1,E1);
+          Edges.InsertAfter(i,E2);
+        }
+        else {
+          tmpEdges.Append(E);
+        }
+      }
+    }
+    // create wire from other edges
+    TopoDS_Wire W;
+    B.MakeWire(W);
+    for (; i<=Edges.Length(); i++)
+      B.Add(W,Edges.Value(i));
+    Wires.Append(W);
+    //cout<<"Wires.Length()="<<Wires.Length()<<endl;
+  }
+
+  if (Wires.Length() != nbLocs-1) {
+    if (aCI) delete aCI;
+    Standard_ConstructionError::Raise
+      ("One of location shapes is not lied on the path");
+  }
+
+  //TopTools_SequenceOfShape aSeqBases;
+  //TopTools_SequenceOfShape aSeqSubBases;
+  //TopTools_SequenceOfShape aSeqFaces;
+  TopoDS_Compound aComp;
+  B.MakeCompound(aComp);
+  for (i = 1; i < nbBases; i++) {
+    TopoDS_Wire WPath = TopoDS::Wire(Wires.Value(i));
+    // 1 section
+    Handle(Standard_Transient) anItem1 = aBasesObjs->Value(i);
+    if (anItem1.IsNull())
+      continue;
+    Handle(GEOM_Function) aRefBase1 = Handle(GEOM_Function)::DownCast(anItem1);
+    if (aRefBase1.IsNull())
+      continue;
+    TopoDS_Shape aShBase1 = aRefBase1->GetValue();
+    if (aShBase1.IsNull())
+      continue;
+    TopAbs_ShapeEnum aType1 = aShBase1.ShapeType();
+    // 2 section
+    Handle(Standard_Transient) anItem2 = aBasesObjs->Value(i+1);
+    if (anItem2.IsNull())
+      continue;
+    Handle(GEOM_Function) aRefBase2 = Handle(GEOM_Function)::DownCast(anItem2);
+    if (aRefBase2.IsNull())
+      continue;
+    TopoDS_Shape aShBase2 = aRefBase2->GetValue();
+    if (aShBase2.IsNull())
+      continue;
+    TopAbs_ShapeEnum aType2 = aShBase2.ShapeType();
+
+    //BRepTools::Write(aShBase1,"/dn02/users_Linux/skl/work/Bugs/14857/base1.brep");
+
+    bool OkSec = (aType1==TopAbs_SHELL || aType1==TopAbs_FACE) &&
+                 (aType2==TopAbs_SHELL || aType2==TopAbs_FACE);
+    if (!OkSec) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("One of section shapes has invalid type");
+    }
+
+    bool CreateFewSolids = false;
+    // compare sections
+    TopExp_Explorer anExp;
+    Standard_Integer nbf1 = 0;
+    for (anExp.Init(aShBase1, TopAbs_FACE); anExp.More(); anExp.Next()) {
+      nbf1++;
+    }
+    Standard_Integer nbf2 = 0;
+    for (anExp.Init(aShBase2, TopAbs_FACE); anExp.More(); anExp.Next()) {
+      nbf2++;
+    }
+    if (nbf1==nbf2) {
+      CreateFewSolids = true;
+    }
+
+    /*
+    // check orientation of sections
+    bool NeedReverse = false;
+    {
+      // first section
+      anExp.Init(aShBase1, TopAbs_FACE);
+      TopoDS_Shape aFace = anExp.Current();
+      TColgp_SequenceOfPnt aPnts;
+      double xc=0, yc=0, zc=0;
+      for (anExp.Init(aFace, TopAbs_VERTEX); anExp.More(); anExp.Next()) {
+        TopoDS_Vertex V = TopoDS::Vertex(anExp.Current());
+        aPnts.Append(BRep_Tool::Pnt(V));
+        xc += aPnts.Last().X();
+        yc += aPnts.Last().Y();
+        zc += aPnts.Last().Z();
+      }
+      gp_Pnt PC(xc/aPnts.Length(), yc/aPnts.Length(), zc/aPnts.Length());
+      gp_Vec V1(PC,aPnts.Value(1));
+      gp_Vec V2(PC,aPnts.Value(2));
+      gp_Vec VN = V1.Crossed(V2);
+      for (int ip=2; ip<aPnts.Length(); ip++) {
+        V1 = gp_Vec(PC,aPnts.Value(ip));
+        V2 = gp_Vec(PC,aPnts.Value(ip+1));
+        VN.Add(V1.Crossed(V2));
+      }
+      gp_Vec PathNorm;
+      gp_Pnt PLoc = BRep_Tool::Pnt(TopoDS::Vertex(VLocs(i)));
+      TopExp_Explorer WE;
+      for (WE.Init(WPath, TopAbs_EDGE); WE.More(); WE.Next()) {
+        TopoDS_Edge edge = TopoDS::Edge(WE.Current());
+        double tol = BRep_Tool::Tolerance(edge);
+        TopoDS_Vertex VF = sae.FirstVertex(edge);
+        gp_Pnt PF = BRep_Tool::Pnt(VF);
+        if (PF.Distance(PLoc) < tol) {
+          double fp,lp;
+          Handle(Geom_Curve) C = BRep_Tool::Curve(edge,fp,lp);
+          gp_Pnt P1,P2;
+          C->D0(fp,P1);
+          if (P1.Distance(PLoc) < tol) {
+            C->D0(fp+(lp-fp)/100,P2);
+          }
+          else {
+            C->D0(lp,P1);
+            C->D0(lp+(fp-lp)/100,P2);
+          }
+          PathNorm = gp_Vec(P1,P2);
+          break;
+        }
+        else {
+          TopoDS_Vertex VL = sae.LastVertex(edge);
+          gp_Pnt PL = BRep_Tool::Pnt(VL);
+          if (PL.Distance(PLoc) < tol) {
+            double fp,lp;
+            Handle(Geom_Curve) C = BRep_Tool::Curve(edge,fp,lp);
+            gp_Pnt P1,P2;
+            C->D0(fp,P1);
+            if (P1.Distance(PLoc) < tol) {
+              C->D0(fp+(lp-fp)/100,P2);
+            }
+            else {
+              C->D0(lp,P1);
+              C->D0(lp+(fp-lp)/100,P2);
+            }
+            PathNorm = gp_Vec(P2,P1);
+            break;
+          }
+        }
+      }
+      cout<<"VN("<<VN.X()<<","<<VN.Y()<<","<<VN.Z()<<")"<<endl;
+      cout<<"PathNorm("<<PathNorm.X()<<","<<PathNorm.Y()<<","<<PathNorm.Z()<<")"<<endl;
+      if (fabs(VN.Angle(PathNorm))>PI/2.) {
+        NeedReverse = true;
+        aShBase1.Reverse();
+      }
+    }
+    {
+      // second section
+      anExp.Init(aShBase2, TopAbs_FACE);
+      TopoDS_Shape aFace = anExp.Current();
+      TColgp_SequenceOfPnt aPnts;
+      double xc=0, yc=0, zc=0;
+      for (anExp.Init(aFace, TopAbs_VERTEX); anExp.More(); anExp.Next()) {
+        TopoDS_Vertex V = TopoDS::Vertex(anExp.Current());
+        aPnts.Append(BRep_Tool::Pnt(V));
+        xc += aPnts.Last().X();
+        yc += aPnts.Last().Y();
+        zc += aPnts.Last().Z();
+      }
+      gp_Pnt PC(xc/aPnts.Length(), yc/aPnts.Length(), zc/aPnts.Length());
+      gp_Vec V1(PC,aPnts.Value(1));
+      gp_Vec V2(PC,aPnts.Value(2));
+      gp_Vec VN = V1.Crossed(V2);
+      for (int ip=2; ip<aPnts.Length(); ip++) {
+        V1 = gp_Vec(PC,aPnts.Value(ip));
+        V2 = gp_Vec(PC,aPnts.Value(ip+1));
+        VN.Add(V1.Crossed(V2));
+      }
+      gp_Vec PathNorm;
+      gp_Pnt PLoc = BRep_Tool::Pnt(TopoDS::Vertex(VLocs(i+1)));
+      TopExp_Explorer WE;
+      for (WE.Init(WPath, TopAbs_EDGE); WE.More(); WE.Next()) {
+        TopoDS_Edge edge = TopoDS::Edge(WE.Current());
+        double tol = BRep_Tool::Tolerance(edge);
+        TopoDS_Vertex VF = sae.FirstVertex(edge);
+        gp_Pnt PF = BRep_Tool::Pnt(VF);
+        if (PF.Distance(PLoc) < tol) {
+          double fp,lp;
+          Handle(Geom_Curve) C = BRep_Tool::Curve(edge,fp,lp);
+          gp_Pnt P1,P2;
+          C->D0(fp,P1);
+          if (P1.Distance(PLoc) < tol) {
+            C->D0(fp+(lp-fp)/100,P2);
+          }
+          else {
+            C->D0(lp,P1);
+            C->D0(lp+(fp-lp)/100,P2);
+          }
+          PathNorm = gp_Vec(P2,P1);
+          break;
+        }
+        else {
+          TopoDS_Vertex VL = sae.LastVertex(edge);
+          gp_Pnt PL = BRep_Tool::Pnt(VL);
+          if (PL.Distance(PLoc) < tol) {
+            double fp,lp;
+            Handle(Geom_Curve) C = BRep_Tool::Curve(edge,fp,lp);
+            gp_Pnt P1,P2;
+            C->D0(fp,P1);
+            if (P1.Distance(PLoc) < tol) {
+              C->D0(fp+(lp-fp)/100,P2);
+            }
+            else {
+              C->D0(lp,P1);
+              C->D0(lp+(fp-lp)/100,P2);
+            }
+            PathNorm = gp_Vec(P2,P1);
+            break;
+          }
+        }
+      }
+      //cout<<"VN("<<VN.X()<<","<<VN.Y()<<","<<VN.Z()<<")"<<endl;
+      //cout<<"PathNorm("<<PathNorm.X()<<","<<PathNorm.Y()<<","<<PathNorm.Z()<<")"<<endl;
+      if (fabs(VN.Angle(PathNorm))>PI/2.)
+        aShBase2.Reverse();
+    }
+    */
+
+    if (!CreateFewSolids) {
+      // we can create only one solid
+      TopoDS_Shape aWire1, aWire2;
+      // prepare aWire1
+      if (aType1==TopAbs_SHELL) {
+        // create wire as boundary contour if shell is no closed
+        // get free boundary shapes
+        ShapeAnalysis_FreeBounds anAnalizer(aShBase1);
+        TopoDS_Compound aClosed = anAnalizer.GetClosedWires();
+        //TopExp_Explorer anExp;
+        Standard_Integer NbWires = 0;
+        for (anExp.Init(aClosed, TopAbs_WIRE); anExp.More(); anExp.Next()) {
+          NbWires++;
+          aWire1 = anExp.Current();
+        }
+        if (NbWires!=1) {
+          // bad case
+          if (aCI) delete aCI;
+          Standard_ConstructionError::Raise("Bad shell is used as section ");
+        }
+      }
+      else { // aType1==TopAbs_FACE
+        TopExp_Explorer aExpW(aShBase1,TopAbs_WIRE);
+        aWire1 = aExpW.Current();
+      }
+      // prepare aWire2
+      if (aType2==TopAbs_SHELL) {
+        // create wire as boundary contour if shell is no closed
+        // get free boundary shapes
+        ShapeAnalysis_FreeBounds anAnalizer(aShBase2);
+        TopoDS_Compound aClosed = anAnalizer.GetClosedWires();
+        //TopExp_Explorer anExp;
+        Standard_Integer NbWires = 0;
+        for (anExp.Init(aClosed, TopAbs_WIRE); anExp.More(); anExp.Next()) {
+          NbWires++;
+          aWire2 = anExp.Current();
+        }
+        if (NbWires!=1) {
+          // bad case
+          if (aCI) delete aCI;
+          Standard_ConstructionError::Raise("Bad shell is used as section ");
+        }
+      }
+      else { // aType2==TopAbs_FACE
+        TopExp_Explorer aExpW(aShBase2,TopAbs_WIRE);
+        aWire2 = aExpW.Current();
+      }
+      // make pipe using aWire1 and aWire2
+      if (!aWire1.IsNull() && !aWire2.IsNull()) {
+        //BRepOffsetAPI_MakePipeShell aBuilder(aWirePath);
+        BRepOffsetAPI_MakePipeShell aBuilder(WPath);
+        aBuilder.Add(aWire1, TopoDS::Vertex(VLocs(i)),
+                     aWithContact, aWithCorrect);
+        aBuilder.Add(aWire2, TopoDS::Vertex(VLocs(i+1)),
+                     aWithContact, aWithCorrect);
+        if (!aBuilder.IsReady()) {
+          if (aCI) delete aCI;
+          Standard_ConstructionError::Raise("Invalid input data for building PIPE: bases are invalid");
+        }
+        aBuilder.Build();
+        TopoDS_Shape aShape = aBuilder.Shape();
+        TopoDS_Shell aShell;
+        B.MakeShell(aShell);
+        for (anExp.Init(aShape, TopAbs_FACE); anExp.More(); anExp.Next()) {
+          B.Add(aShell,anExp.Current());
+        }
+        for (anExp.Init(aShBase1, TopAbs_FACE); anExp.More(); anExp.Next()) {
+          B.Add(aShell,anExp.Current());
+        }
+        for (anExp.Init(aShBase2, TopAbs_FACE); anExp.More(); anExp.Next()) {
+          B.Add(aShell,anExp.Current());
+        }
+        // make sewing for this shell
+        Handle(BRepBuilderAPI_Sewing) aSewing = new BRepBuilderAPI_Sewing;
+        aSewing->SetTolerance(Precision::Confusion());
+        aSewing->SetFaceMode(Standard_True);
+        aSewing->SetFloatingEdgesMode(Standard_False);
+        aSewing->SetNonManifoldMode(Standard_False);
+        for (anExp.Init(aShell, TopAbs_FACE); anExp.More(); anExp.Next()) {
+          aSewing->Add(anExp.Current());
+        }
+        aSewing->Perform();
+        const TopoDS_Shape aSewShape = aSewing->SewedShape();
+        if (aSewShape.ShapeType() == TopAbs_SHELL) {
+          aShell = TopoDS::Shell(aSewShape);
+          GProp_GProps aSystem;
+          BRepGProp::VolumeProperties(aShell, aSystem);
+          if (aSystem.Mass()<0) {
+            aShell.Reverse();
+          }
+          if (BRep_Tool::IsClosed(aShell)) {
+            TopoDS_Solid aSolid;
+            B.MakeSolid(aSolid);
+            B.Add(aSolid,aShell);
+            B.Add(aComp,aSolid);
+          }
+          else {
+            B.Add(aComp,aShell);
+          }
+        }
+        else {
+          B.Add(aComp,aShell);
+        }
+      }
+    }
+    else {
+      // main block - creation few solids (for each pair of faces)
+      TopTools_MapOfShape aFaces1,aFaces2;
+      for (anExp.Init(aShBase1, TopAbs_FACE); anExp.More(); anExp.Next()) {
+        aFaces1.Add(anExp.Current());
+      }
+      for (anExp.Init(aShBase2, TopAbs_FACE); anExp.More(); anExp.Next()) {
+        aFaces2.Add(anExp.Current());
+      }
+      // creating map of edge faces
+      TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces1;
+      TopExp::MapShapesAndAncestors(aShBase1, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces1);
+      TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces2;
+      TopExp::MapShapesAndAncestors(aShBase2, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces2);
+
+      // constuct map face->face
+      TopTools_IndexedDataMapOfShapeShape FF;
+      TopoDS_Shape FS1,FS2;
+      if (nbSubBases==0) {
+        // find edge the most distant from location point
+        // (this edge is not shared by two faces)
+        double maxdist = 0.;
+        TopoDS_Shape E1;
+        TopoDS_Vertex V11,V21;
+        for (j=1; j<=aMapEdgeFaces1.Extent(); j++) {
+          TopoDS_Shape tmp = aMapEdgeFaces1.FindKey(j);
+          const TopTools_ListOfShape& aList = aMapEdgeFaces1.FindFromKey(tmp);
+          if (aList.Extent()>1)
+            continue;
+          TopExp_Explorer expv;
+          expv.Init(tmp, TopAbs_VERTEX);
+          TopoDS_Vertex V1 = TopoDS::Vertex(expv.Current());
+          expv.Next();
+          TopoDS_Vertex V2 = TopoDS::Vertex(expv.Current());
+          gp_Pnt P1 = BRep_Tool::Pnt(V1);
+          gp_Pnt P2 = BRep_Tool::Pnt(V2);
+          double dist = PLocs.Value(i).Distance(P1) + PLocs.Value(i).Distance(P2);
+          if (dist>maxdist) {
+            E1 = tmp;
+            V11 = V1;
+            V21 = V2;
+            TopTools_ListIteratorOfListOfShape anIter(aList);
+            FS1 = anIter.Value();
+            maxdist = dist;
+          }
+        }
+        // main direction for comparing
+        gp_Vec VM(PLocs.Value(i),PLocs.Value(i+1));
+        // find corresponding edge from next section
+        double minang = M_PI;
+        gp_Pnt P11 = BRep_Tool::Pnt(V11);
+        gp_Pnt P21 = BRep_Tool::Pnt(V21);
+        TopoDS_Shape E2;
+        TopoDS_Vertex V12,V22;
+        for (j=1; j<=aMapEdgeFaces2.Extent(); j++) {
+          TopoDS_Shape tmp = aMapEdgeFaces2.FindKey(j);
+          const TopTools_ListOfShape& aList = aMapEdgeFaces2.FindFromKey(tmp);
+          if (aList.Extent()>1)
+            continue;
+          TopExp_Explorer expv;
+          expv.Init(tmp, TopAbs_VERTEX);
+          TopoDS_Vertex V1tmp = TopoDS::Vertex(expv.Current());
+          expv.Next();
+          TopoDS_Vertex V2tmp = TopoDS::Vertex(expv.Current());
+          gp_Pnt P1tmp = BRep_Tool::Pnt(V1tmp);
+          gp_Pnt P2tmp = BRep_Tool::Pnt(V2tmp);
+          double d1 = P1tmp.Distance(P11) + P2tmp.Distance(P21);
+          double d2 = P1tmp.Distance(P21) + P2tmp.Distance(P11);
+          TopoDS_Vertex V1,V2;
+          gp_Pnt P1,P2;
+          if (d1>d2) {
+            V1 = V2tmp; P1 = P2tmp;
+            V2 = V1tmp; P2 = P1tmp;
+          }
+          else {
+            V1 = V1tmp; P1 = P1tmp;
+            V2 = V2tmp; P2 = P2tmp;
+          }
+          gp_Vec Vec1(P11,P1);
+          gp_Vec Vec2(P21,P2);
+          double ang = fabs(Vec1.Angle(VM)) + fabs(Vec2.Angle(VM));
+          if (ang<minang) {
+            E2 = tmp;
+            V12 = V1;
+            V22 = V2;
+            TopTools_ListIteratorOfListOfShape anIter(aList);
+            FS2 = anIter.Value();
+            minang = ang;
+          }
+        }
+        // put all pairs to map FF
+        FF.Add(FS1,FS2);
+        FF.Add(E1,E2);
+        FF.Add(V11,V12);
+        FF.Add(V21,V22);
+
+        // add pairs of edges to FF
+        bool stat =  FillForOtherEdges(FS1,E1,V11,FF);
+        if (!stat) {
+          if (aCI) delete aCI;
+          Standard_ConstructionError::Raise("FindForOtherEdges: Can not mapping other egdes");
+        }
+
+      }
+      else {
+        { // 1 section
+          Handle(Standard_Transient) anItem = aSubBasesObjs->Value(i);
+          if (anItem.IsNull()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          Handle(GEOM_Function) aRefBase = Handle(GEOM_Function)::DownCast(anItem);
+          if (aRefBase.IsNull()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          TopoDS_Shape aSh = aRefBase->GetValue();
+          if (aSh.IsNull()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          if (aSh.ShapeType()!=TopAbs_FACE) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          FS1 = aSh;
+        }
+        { // 2 section
+          Handle(Standard_Transient) anItem = aSubBasesObjs->Value(i+1);
+          if (anItem.IsNull()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          Handle(GEOM_Function) aRefBase = Handle(GEOM_Function)::DownCast(anItem);
+          if (aRefBase.IsNull()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          TopoDS_Shape aSh = aRefBase->GetValue();
+          if (aSh.IsNull()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          if (aSh.ShapeType()!=TopAbs_FACE) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid subbase shape");
+          }
+          FS2 = aSh;
+        }
+
+        if (!aFaces1.Contains(FS1) || !aFaces2.Contains(FS2)) {
+          if (aCI) delete aCI;
+          Standard_ConstructionError::Raise("Invalid subbase shape");
+        }
+
+        FF.Add(FS1,FS2);
+
+        // add pairs of edges to FF
+        bool stat =  FillCorrespondingEdges(FS1, FS2, TopoDS::Vertex(VLocs(i)),
+                                            TopoDS::Vertex(VLocs(i+1)), WPath, FF);
+        if (!stat) {
+          if (aCI) delete aCI;
+          Standard_ConstructionError::Raise("Can not create correct pipe");
+        }
+      }
+
+      FindNextPairOfFaces(FS1, aMapEdgeFaces1, aMapEdgeFaces2, FF, aCI);
+
+      // make pipe for each pair of faces
+      for (j=1; j<=FF.Extent(); j++) {
+        TopoDS_Shape F1 = FF.FindKey(j);
+        if (F1.ShapeType() != TopAbs_FACE)
+          continue;
+        TopoDS_Shape F2 = FF.FindFromIndex(j);
+        TopExp_Explorer aExpW1(F1,TopAbs_WIRE);
+        TopoDS_Wire aWire1 = TopoDS::Wire(aExpW1.Current());
+        TopExp_Explorer aExpW2(F2,TopAbs_WIRE);
+        TopoDS_Wire aWire2 = TopoDS::Wire(aExpW2.Current());
+        // make pipe using aWire1 and aWire2
+        if (!aWire1.IsNull() && !aWire2.IsNull()) {
+          BRepOffsetAPI_MakePipeShell aBuilder(WPath);
+          aBuilder.Add(aWire1, TopoDS::Vertex(VLocs(i)),
+                       aWithContact, aWithCorrect);
+          aBuilder.Add(aWire2, TopoDS::Vertex(VLocs(i+1)),
+                       aWithContact, aWithCorrect);
+          if (!aBuilder.IsReady()) {
+            if (aCI) delete aCI;
+            Standard_ConstructionError::Raise("Invalid input data for building PIPE: bases are invalid");
+          }
+          aBuilder.Build();
+          TopoDS_Shape aShape = aBuilder.Shape();
+          TopoDS_Shell aShell;
+          B.MakeShell(aShell);
+          for (anExp.Init(aShape, TopAbs_FACE); anExp.More(); anExp.Next()) {
+            B.Add(aShell,anExp.Current());
+          }
+
+          B.Add(aShell,F1);
+          B.Add(aShell,F2);
+          // make sewing for this shell
+          Handle(BRepBuilderAPI_Sewing) aSewing = new BRepBuilderAPI_Sewing;
+          aSewing->SetTolerance(Precision::Confusion());
+          aSewing->SetFaceMode(Standard_True);
+          aSewing->SetFloatingEdgesMode(Standard_False);
+          aSewing->SetNonManifoldMode(Standard_False);
+          for (anExp.Init(aShell, TopAbs_FACE); anExp.More(); anExp.Next()) {
+            aSewing->Add(anExp.Current());
+          }
+          aSewing->Perform();
+          const TopoDS_Shape aSewShape = aSewing->SewedShape();
+          if (aSewShape.ShapeType() == TopAbs_SHELL) {
+            aShell = TopoDS::Shell(aSewShape);
+            GProp_GProps aSystem;
+            BRepGProp::VolumeProperties(aShell, aSystem);
+            if (aSystem.Mass()<0) {
+              //cout<<"aSewShape is reversed"<<endl;
+              aShell.Reverse();
+            }
+            if (BRep_Tool::IsClosed(aShell)) {
+              TopoDS_Solid aSolid;
+              B.MakeSolid(aSolid);
+              B.Add(aSolid,aShell);
+              B.Add(aComp,aSolid);
+            }
+            else {
+              B.Add(aComp,aShell);
+            }
+          }
+          else {
+            B.Add(aComp,aShell);
+          }
+        }
+      }
+
+    }
+  }
+
+  //BRepTools::Write(aComp,"/dn02/users_Linux/skl/work/Bugs/14857/comp.brep");
+  return aComp;
+}
+
+//=======================================================================
+//function : CreatePipeShellsWithoutPath
+//purpose  : auxilary for Execute()
+//=======================================================================
+static TopoDS_Shape CreatePipeShellsWithoutPath(GEOMImpl_IPipe* aCI)
+{
+  //cout<<"CreatePipeShellsWithoutPath"<<endl;
+  int i,j;
+  BRep_Builder B;
+
+  GEOMImpl_IPipeShellSect* aCIDS = (GEOMImpl_IPipeShellSect*)aCI;
+  // shell sections
+  Handle(TColStd_HSequenceOfTransient) aBasesObjs = aCIDS->GetBases();
+  // vertex for recognition
+  Handle(TColStd_HSequenceOfTransient) VObjs = aCIDS->GetLocations();
+
+  Standard_Integer nbBases = aBasesObjs->Length(),
+    nbv = (VObjs.IsNull() ? 0 :VObjs->Length());
+
+  if (nbv != nbBases) {
+    if (aCI) delete aCI;
+    Standard_ConstructionError::Raise("Number of shapes for recognition is invalid");
+  }
+
+  TopTools_SequenceOfShape SecVs,Bases;
+  for (i=1; i<=nbBases; i++) {
+    // vertex
+    Handle(Standard_Transient) anItem = VObjs->Value(i);
+    if (anItem.IsNull())
+      continue;
+    Handle(GEOM_Function) aRef = Handle(GEOM_Function)::DownCast(anItem);
+    TopoDS_Shape V = aRef->GetValue();
+    if (V.IsNull() || V.ShapeType() != TopAbs_VERTEX)
+      continue;
+    SecVs.Append(V);
+    // section
+    anItem = aBasesObjs->Value(i);
+    if (anItem.IsNull())
+      continue;
+    aRef = Handle(GEOM_Function)::DownCast(anItem);
+    TopoDS_Shape aSh = aRef->GetValue();
+    if (aSh.IsNull())
+      continue;
+    Bases.Append(aSh);
+  }
+  nbv = SecVs.Length();
+  nbBases = Bases.Length();
+  if (nbv != nbBases) {
+    if (aCI) delete aCI;
+    Standard_ConstructionError::Raise("One of shapes for recognition is not a vertex");
+  }
+
+  TopoDS_Compound aComp;
+  B.MakeCompound(aComp);
+
+  for (i = 1; i < nbBases; i++) {
+    MESSAGE ("Make pipe between sections "<<i<<" and "<<i+1);
+    TopoDS_Shape aShBase1 = Bases.Value(i);
+    TopoDS_Shape aShBase2 = Bases.Value(i+1);
+    TopExp_Explorer anExp;
+    Standard_Integer nbf1 = 0;
+    for (anExp.Init(aShBase1, TopAbs_FACE); anExp.More(); anExp.Next()) {
+      nbf1++;
+    }
+    Standard_Integer nbf2 = 0;
+    for (anExp.Init(aShBase2, TopAbs_FACE); anExp.More(); anExp.Next()) {
+      nbf2++;
+    }
+    //cout<<"nbf1="<<nbf1<<" nbf2="<<nbf2<<endl;
+    if (nbf1!=nbf2) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("Different number of faces in the sections");
+    }
+
+    TopTools_MapOfShape aFaces1,aFaces2;
+    for (anExp.Init(aShBase1, TopAbs_FACE); anExp.More(); anExp.Next()) {
+      aFaces1.Add(anExp.Current());
+    }
+    for (anExp.Init(aShBase2, TopAbs_FACE); anExp.More(); anExp.Next()) {
+      aFaces2.Add(anExp.Current());
+    }
+
+    // creating map of edge faces
+    TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces1;
+    TopExp::MapShapesAndAncestors(aShBase1, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces1);
+    TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces2;
+    TopExp::MapShapesAndAncestors(aShBase2, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces2);
+
+    // constuct map face->face (and sub-shapes)
+    TopTools_IndexedDataMapOfShapeShape FF;
+    //TopoDS_Shape FS1 = SecFs.Value(i), FS2 = SecFs.Value(i+1);
+    TopoDS_Shape FS1, FS2;
+    TopoDS_Vertex V1 = TopoDS::Vertex(SecVs(i));
+    TopoDS_Vertex V2 = TopoDS::Vertex(SecVs(i+1));
+    FindFirstPairFaces(aShBase1, aShBase2, V1, V2, FS1, FS2);
+
+    FF.Add(FS1,FS2);
+    MESSAGE ("  first pair of corresponding faces is found");
+
+    // add pairs of edges and vertexes to FF
+    bool stat =  FillCorrespondingEdges(FS1, FS2, V1, V2, FF);
+    if (!stat) {
+      if (aCI) delete aCI;
+      Standard_ConstructionError::Raise("Can not create correct pipe");
+    }
+    MESSAGE ("  correspondences for sub-shapes of first pair of faces is found");
+
+    FindNextPairOfFaces(FS1, aMapEdgeFaces1, aMapEdgeFaces2, FF, aCI);
+    MESSAGE ("  other correspondences is found, make pipe for all pairs of faces");
+
+    // make pipe for each pair of faces
+    // auxilary map vertex->edge for created pipe edges
+    TopTools_IndexedDataMapOfShapeShape VPE;
+    ShapeAnalysis_Edge sae;
+    //cout<<"FF.Extent()="<<FF.Extent()<<endl;
+    int nbff = 0;
+    for (j=1; j<=FF.Extent(); j++) {
+      TopoDS_Shape F1 = FF.FindKey(j);
+      if (F1.ShapeType() != TopAbs_FACE)
+        continue;
+      TopoDS_Shape F2 = FF.FindFromIndex(j);
+      nbff++;
+
+      //if (nbff!=3) continue;
+
+      MESSAGE ("    make pipe for "<<nbff<<" face");
+
+      Handle(Geom_Surface) S1 = BRep_Tool::Surface(TopoDS::Face(F1));
+      if (S1->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
+        Handle(Geom_RectangularTrimmedSurface) RTS =
+          Handle(Geom_RectangularTrimmedSurface)::DownCast(S1);
+        S1 = RTS->BasisSurface();
+      }
+      Handle(Geom_Plane) Pln1 = Handle(Geom_Plane)::DownCast(S1);
+      if (Pln1.IsNull()) {
+        if (aCI) delete aCI;
+        Standard_ConstructionError::Raise("Surface from face is not plane");
+      }
+      gp_Vec aDir1(Pln1->Axis().Direction());
+
+      Handle(Geom_Surface) S2 = BRep_Tool::Surface(TopoDS::Face(F2));
+      if (S2->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
+        Handle(Geom_RectangularTrimmedSurface) RTS =
+          Handle(Geom_RectangularTrimmedSurface)::DownCast(S2);
+        S2 = RTS->BasisSurface();
+      }
+      Handle(Geom_Plane) Pln2 =
+          Handle(Geom_Plane)::DownCast(S2);
+      if (Pln2.IsNull()) {
+        if (aCI) delete aCI;
+        Standard_ConstructionError::Raise("Surface from face is not plane");
+      }
+      gp_Vec aDir2(Pln2->Axis().Direction());
+
+      gp_Pnt P1 = BRep_Tool::Pnt(TopoDS::Vertex(SecVs(i)));
+      gp_Pnt P2 = BRep_Tool::Pnt(TopoDS::Vertex(SecVs(i+1)));
+      gp_Vec aDir(P1,P2);
+      if (fabs(aDir.Angle(aDir1)) > M_PI/2.)
+        aDir1.Reverse();
+      if (fabs(aDir.Angle(aDir2)) > M_PI/2.)
+        aDir2.Reverse();
+
+      TopExp_Explorer anExpE(F1,TopAbs_EDGE);
+      TopTools_SequenceOfShape aNewFs;
+      //int nbee=0;
+      for (; anExpE.More(); anExpE.Next()) {
+        TopoDS_Edge E1 = TopoDS::Edge(anExpE.Current());
+        //nbee++;
+        if (!FF.Contains(E1))
+          MESSAGE ("map FF not contains key E1");
+
+        if (VPE.Contains(E1)) {
+          aNewFs.Append(VPE.FindFromKey(E1));
+#ifdef _DEBUG_
+          MESSAGE ("    using existed face");
+#endif
+          continue;
+        }
+
+        TopoDS_Edge E3 = TopoDS::Edge(FF.FindFromKey(E1));
+        TopoDS_Vertex V1 = sae.FirstVertex(E1);
+        TopoDS_Vertex V2 = sae.LastVertex(E1);
+        if (!FF.Contains(V1))
+          MESSAGE ("map FF not contains key V1");
+        if (!FF.Contains(V2))
+          MESSAGE ("map FF not contains key V2");
+        TopoDS_Vertex V3 = TopoDS::Vertex(FF.FindFromKey(V2));
+        TopoDS_Vertex V4 = TopoDS::Vertex(FF.FindFromKey(V1));
+        TopoDS_Vertex Vtmp = sae.FirstVertex(E3);
+        if (Vtmp.IsSame(V4))
+          E3.Reverse();
+        gp_Pnt P1 = BRep_Tool::Pnt(V1);
+        gp_Pnt P2 = BRep_Tool::Pnt(V2);
+        gp_Pnt P3 = BRep_Tool::Pnt(V3);
+        gp_Pnt P4 = BRep_Tool::Pnt(V4);
+        // make E2
+        TopoDS_Edge E2;
+        Handle(Geom_BSplineCurve) C2;
+        if (VPE.Contains(V2)) {
+          E2 = TopoDS::Edge(VPE.FindFromKey(V2));
+          double fp,lp;
+          C2 = Handle(Geom_BSplineCurve)::DownCast(BRep_Tool::Curve(E2,fp,lp));
+        }
+        else {
+          Handle(TColgp_HArray1OfPnt) HAP = new TColgp_HArray1OfPnt(1,2);
+          HAP->SetValue(1,P2);
+          HAP->SetValue(2,P3);
+          GeomAPI_Interpolate anInt(HAP,Standard_False,1.e-7);
+          anInt.Load(aDir1,aDir2);
+          anInt.Perform();
+          C2 = anInt.Curve();
+          B.MakeEdge(E2,C2,1.e-7);
+          B.Add(E2,TopoDS::Vertex(V2.Oriented(TopAbs_FORWARD)));
+          B.Add(E2,TopoDS::Vertex(V3.Oriented(TopAbs_REVERSED)));
+          VPE.Add(V2,E2);
+        }
+        // make E4
+        TopoDS_Edge E4;
+        Handle(Geom_BSplineCurve) C4;
+        if (VPE.Contains(V1)) {
+          E4 = TopoDS::Edge(VPE.FindFromKey(V1));
+          double fp,lp;
+          C4 = Handle(Geom_BSplineCurve)::DownCast(BRep_Tool::Curve(E4,fp,lp));
+        }
+        else {
+          Handle(TColgp_HArray1OfPnt) HAP = new TColgp_HArray1OfPnt(1,2);
+          HAP->SetValue(1,P1);
+          HAP->SetValue(2,P4);
+          GeomAPI_Interpolate anInt(HAP,Standard_False,1.e-7);
+          anInt.Load(aDir1,aDir2);
+          anInt.Perform();
+          C4 = anInt.Curve();
+          B.MakeEdge(E4,anInt.Curve(),1.e-7);
+          B.Add(E4,TopoDS::Vertex(V1.Oriented(TopAbs_FORWARD)));
+          B.Add(E4,TopoDS::Vertex(V4.Oriented(TopAbs_REVERSED)));
+          VPE.Add(V1,E4);
+        }
+
+        TopoDS_Wire W;
+        B.MakeWire(W);
+        B.Add(W,E1);
+        B.Add(W,E2);
+        B.Add(W,E3);
+        B.Add(W,E4.Reversed());
+        //cout<<"      wire for edge "<<nbee<<" is created"<<endl;
+        //BRepTools::Write(W,"/dn02/users_Linux/skl/work/Bugs/14857/w.brep");
+
+        // make surface
+
+        double fp,lp;
+        Handle(Geom_Curve) C1 = BRep_Tool::Curve(E1,fp,lp);
+        //bool IsConicC1 = false;
+        //if (C1->IsKind(STANDARD_TYPE(Geom_Conic))) {
+        //  IsConicC1 = true;
+        //  cout<<"C1 - Geom_Conic"<<endl;
+        //}
+        if (C1->IsKind(STANDARD_TYPE(Geom_Line)) || C1->IsKind(STANDARD_TYPE(Geom_Conic))) {
+          C1 = new Geom_TrimmedCurve(C1,fp,lp);
+        }
+        //if (IsConicC1) {
+        //  double tol = BRep_Tool::Tolerance(E1);
+        //  GeomConvert_ApproxCurve ApxC1(C1,tol,GeomAbs_C1,10,5);
+        //  C1 = ApxC1.Curve();
+        //}
+        Handle(Geom_Curve) C3 = BRep_Tool::Curve(E3,fp,lp);
+        if (C3->IsKind(STANDARD_TYPE(Geom_Line)) || C3->IsKind(STANDARD_TYPE(Geom_Conic))) {
+          C3 = new Geom_TrimmedCurve(C3,fp,lp);
+        }
+        //filebuf fic;
+        //ostream os(&fic);
+        //os.precision(15);
+        Handle(Geom_BSplineCurve) CE1 =
+          GeomConvert::CurveToBSplineCurve(C1,Convert_RationalC1);
+        if (CE1->Degree()<3)
+          CE1->IncreaseDegree(3);
+        Handle(Geom_BSplineCurve) CE2 =
+          GeomConvert::CurveToBSplineCurve(C2,Convert_RationalC1);
+        if (CE2->Degree()<3)
+          CE2->IncreaseDegree(3);
+        Handle(Geom_BSplineCurve) CE3 =
+          GeomConvert::CurveToBSplineCurve(C3,Convert_RationalC1);
+        if (CE3->Degree()<3)
+          CE3->IncreaseDegree(3);
+        Handle(Geom_BSplineCurve) CE4 =
+          GeomConvert::CurveToBSplineCurve(C4,Convert_RationalC1);
+        if (CE4->Degree()<3)
+          CE4->IncreaseDegree(3);
+        //cout<<"CE1->Degree()="<<CE1->Degree()<<" CE2->Degree()="<<CE2->Degree()
+        //    <<" CE3->Degree()="<<CE3->Degree()<<" CE4->Degree()="<<CE4->Degree()<<endl;
+        //if (fic.open("/dn02/users_Linux/skl/work/Bugs/14857/ce1.brep",ios::out)) {
+        //  os<<"DrawTrSurf_BSplineCurve"<<endl;
+        //  GeomTools::Write(CE1,os);
+        //  fic.close();
+        //}
+
+        Handle(Geom_Surface) BS;
+        try {
+          GeomFill_BSplineCurves GF(CE1,CE2,CE3,CE4,GeomFill_CoonsStyle);
+          //GeomFill_BSplineCurves GF(CE1,CE2,CE3,CE4,GeomFill_StretchStyle);
+          BS = GF.Surface();
+        }
+        catch(...) {
+          MESSAGE ("      can not create BSplineSurface - create Bezier");
+          int NbP=26;
+          TColgp_Array2OfPnt Points(1,NbP,1,NbP);
+          double fp1,lp1,fp2,lp2;
+          Handle(Geom_Curve) C1 = BRep_Tool::Curve(E1,fp1,lp1);
+          Handle(Geom_Curve) C3 = BRep_Tool::Curve(E3,fp2,lp2);
+          gp_Pnt P1C1,P2C1;
+          C1->D0(fp1,P1C1);
+          C1->D0(lp1,P2C1);
+          gp_Pnt P1C3,P2C3;
+          C3->D0(fp2,P1C3);
+          C3->D0(lp2,P2C3);
+          int n1,n2;
+          double fp,lp;
+          // get points from C1
+          if (P1.Distance(P1C1)<1.e-6) {
+            fp = fp1;
+            lp = lp1;
+          }
+          else {
+            fp = lp1;
+            lp = fp1;
+          }
+          double step = (lp-fp)/(NbP-1);
+          Points.SetValue(1,1,P1);
+          double par = fp;
+          for (n1=2; n1<NbP; n1++) {
+            gp_Pnt P;
+            par += step;
+            C1->D0(par,P);
+            Points.SetValue(1,n1,P);
+          }
+          Points.SetValue(1,NbP,P2);
+          // get points from C3
+          if (P4.Distance(P1C3)<1.e-6) {
+            fp = fp2;
+            lp = lp2;
+          }
+          else {
+            fp = lp2;
+            lp = fp2;
+          }
+          step = (lp-fp)/(NbP-1);
+          Points.SetValue(NbP,1,P4);
+          par = fp;
+          for (n1=2; n1<NbP; n1++) {
+            gp_Pnt P;
+            par += step;
+            C3->D0(par,P);
+            Points.SetValue(NbP,n1,P);
+          }
+          Points.SetValue(NbP,NbP,P3);
+          // create isolines and get points from them
+          for (n1=1; n1<=NbP; n1++) {
+            gp_Pnt PI1 = Points.Value(1,n1);
+            gp_Pnt PI2 = Points.Value(NbP,n1);
+            Handle(TColgp_HArray1OfPnt) HAP = new TColgp_HArray1OfPnt(1,2);
+            HAP->SetValue(1,PI1);
+            HAP->SetValue(2,PI2);
+            GeomAPI_Interpolate anInt(HAP,Standard_False,1.e-7);
+            anInt.Load(aDir1,aDir2);
+            anInt.Perform();
+            Handle(Geom_Curve) iso = anInt.Curve();
+            fp = iso->FirstParameter();
+            lp = iso->LastParameter();
+            step = (lp-fp)/(NbP-1);
+            par = fp;
+            TopoDS_Compound VComp;
+            B.MakeCompound(VComp);
+            for (n2=2; n2<NbP; n2++) {
+              gp_Pnt P;
+              par += step;
+              iso->D0(par,P);
+              Points.SetValue(n2,n1,P);
+            }
+          }
+          // create surface and face
+          //Handle(Geom_BezierSurface) BS = new Geom_BezierSurface(Points);
+          BS = new Geom_BezierSurface(Points);
+        }
+
+        BRepBuilderAPI_MakeFace BB(BS,W);
+        TopoDS_Face NewF = BB.Face();
+        Handle(ShapeFix_Face) sff = new ShapeFix_Face(NewF);
+        sff->Perform();
+        sff->FixOrientation();
+        TopoDS_Face FixedFace = sff->Face();
+        aNewFs.Append(FixedFace);
+        VPE.Add(E1,FixedFace);
+        //cout<<"      face for edge "<<nbee<<" is created"<<endl;
+        //BRepTools::Write(FixedFace,"/dn02/users_Linux/skl/work/Bugs/14857/f.brep");
+      }
+      // make shell
+      TopoDS_Shell aShell;
+      B.MakeShell(aShell);
+      for (int nf=1; nf<=aNewFs.Length(); nf++) {
+        B.Add(aShell,aNewFs(nf));
+      }
+      B.Add(aShell,F1);
+      B.Add(aShell,F2);
+
+      // make sewing for this shell
+      Handle(BRepBuilderAPI_Sewing) aSewing = new BRepBuilderAPI_Sewing;
+      aSewing->SetTolerance(Precision::Confusion());
+      aSewing->SetFaceMode(Standard_True);
+      aSewing->SetFloatingEdgesMode(Standard_False);
+      aSewing->SetNonManifoldMode(Standard_False);
+      for (anExp.Init(aShell, TopAbs_FACE); anExp.More(); anExp.Next()) {
+        aSewing->Add(anExp.Current());
+      }
+      aSewing->Perform();
+      MESSAGE ("    shell for face "<<nbff<<" is created");
+      const TopoDS_Shape aSewShape = aSewing->SewedShape();
+      //BRepTools::Write(aSewShape,"/dn02/users_Linux/skl/work/Bugs/14857/sew.brep");
+      if (aSewShape.ShapeType() == TopAbs_SHELL) {
+        aShell = TopoDS::Shell(aSewShape);
+        GProp_GProps aSystem;
+        BRepGProp::VolumeProperties(aShell, aSystem);
+        if (aSystem.Mass()<0) {
+          //cout<<"aSewShape is reversed"<<endl;
+          aShell.Reverse();
+        }
+        if (BRep_Tool::IsClosed(aShell)) {
+          TopoDS_Solid aSolid;
+          B.MakeSolid(aSolid);
+          B.Add(aSolid,aShell);
+          B.Add(aComp,aSolid);
+          MESSAGE ("    solid for face "<<nbff<<" is created");
+        }
+        else {
+          B.Add(aComp,aShell);
+          MESSAGE ("    solid for face "<<nbff<<" is not created");
+        }
+      }
+      else {
+        B.Add(aComp,aShell);
+        MESSAGE ("    solid for face "<<nbff<<" is not created");
+      }
+      //cout<<"    solid for face "<<nbff<<" is created"<<endl;
+
+      //Handle(ShapeFix_Shell) sfs = new ShapeFix_Shell(aShell);
+      //sfs->Perform();
+      //TopoDS_Shell FixedShell = sfs->Shell();
+      /*
+      GProp_GProps aSystem;
+      BRepGProp::VolumeProperties(FixedShell, aSystem);
+      if (aSystem.Mass()<0) {
+        //cout<<"aSewShape is reversed"<<endl;
+        FixedShell.Reverse();
+      }
+      if (BRep_Tool::IsClosed(FixedShell)) {
+        TopoDS_Solid aSolid;
+        B.MakeSolid(aSolid);
+        B.Add(aSolid,aShell);
+        B.Add(aComp,aSolid);
+      }
+      else {
+        B.Add(aComp,FixedShell);
+      }
+      */
+    }
+  }
+
+  //BRepTools::Write(aComp,"/dn02/users_Linux/skl/work/Bugs/14857/comp.brep");
+  return aComp;
+}
+
+//=======================================================================
+//function : CreatePipeBiNormalAlongVector
+//purpose  : auxilary for Execute()
+//=======================================================================
+static TopoDS_Shape CreatePipeBiNormalAlongVector(const TopoDS_Wire& aWirePath,
+                                                  GEOMImpl_IPipe* aCI)
+{
+  GEOMImpl_IPipeBiNormal* aCIBN = (GEOMImpl_IPipeBiNormal*)aCI;
+
+  Handle(GEOM_Function) aRefBase = aCIBN->GetBase();
+  Handle(GEOM_Function) aRefVec = aCIBN->GetVector();
+  TopoDS_Shape aShapeBase = aRefBase->GetValue();
+  TopoDS_Shape aShapeVec = aRefVec->GetValue();
+
+  if (aShapeBase.IsNull()) {
+    if (aCIBN) delete aCIBN;
+    Standard_NullObject::Raise("MakePipe aborted : null base argument");
+  }
+
+  // Make copy to prevent modifying of base object: 0021525
+  BRepBuilderAPI_Copy Copy (aShapeBase);
+  if (Copy.IsDone())
+    aShapeBase = Copy.Shape();
+
+  TopoDS_Shape aProf;
+  if (aShapeBase.ShapeType() == TopAbs_VERTEX) {
+    aProf = aShapeBase;
+  }
+  else if (aShapeBase.ShapeType() == TopAbs_EDGE) {
+    aProf = BRepBuilderAPI_MakeWire(TopoDS::Edge(aShapeBase)).Shape();
+  }
+  else if (aShapeBase.ShapeType() == TopAbs_WIRE) {
+    aProf = aShapeBase;
+  }
+  else if (aShapeBase.ShapeType() == TopAbs_FACE) {
+    TopExp_Explorer wexp (aShapeBase,TopAbs_WIRE);
+    aProf = wexp.Current();
+  }
+  else {
+    Standard_TypeMismatch::Raise
+      ("MakePipe aborted : invalid type of base");
+  }
+  BRepOffsetAPI_MakePipeShell PipeBuilder (aWirePath);
+  PipeBuilder.Add(aProf);
+
+  if (aShapeVec.IsNull()) {
+    if (aCIBN) delete aCIBN;
+    Standard_NullObject::Raise
+      ("MakePipe aborted : null vector argument");
+  }
+  if (aShapeVec.ShapeType() != TopAbs_EDGE)
+    Standard_TypeMismatch::Raise
+      ("MakePipe aborted: invalid type of vector");
+  TopoDS_Edge anEdge = TopoDS::Edge(aShapeVec);
+  TopoDS_Vertex V1, V2;
+  TopExp::Vertices(anEdge, V1, V2, Standard_True);
+  if (V1.IsNull() || V2.IsNull())
+    Standard_NullObject::Raise
+      ("MakePipe aborted: vector is not defined");
+  gp_Vec aVec(BRep_Tool::Pnt(V1), BRep_Tool::Pnt(V2));
+  gp_Dir BiNormal(aVec);
+  PipeBuilder.SetMode(BiNormal);
+  PipeBuilder.Build();
+  if (aShapeBase.ShapeType() == TopAbs_FACE) {
+      PipeBuilder.MakeSolid();
+  }
+
+  return PipeBuilder.Shape();
+}
+
 //=======================================================================
 //function : Execute
 //purpose  :
 //=======================================================================
-Standard_Integer GEOMImpl_PipeDriver::Execute(TFunction_Logbook& log) const
+Standard_Integer GEOMImpl_PipeDriver::Execute (TFunction_Logbook& log) const
 {
   if (Label().IsNull()) return 0;
   Handle(GEOM_Function) aFunction = GEOM_Function::GetFunction(Label());
-
-  GEOMImpl_IPipe aCI (aFunction);
   Standard_Integer aType = aFunction->GetType();
 
-  TopoDS_Shape aShape;
+  GEOMImpl_IPipe* aCI = 0;
+  if (aType == PIPE_BASE_PATH)
+    aCI = new GEOMImpl_IPipe (aFunction);
+  else if (aType == PIPE_DIFFERENT_SECTIONS)
+    aCI = new GEOMImpl_IPipeDiffSect (aFunction);
+  else if (aType == PIPE_SHELL_SECTIONS)
+    aCI = new GEOMImpl_IPipeShellSect (aFunction);
+  else if (aType == PIPE_SHELLS_WITHOUT_PATH)
+    aCI = new GEOMImpl_IPipeShellSect (aFunction);
+  else if (aType == PIPE_BI_NORMAL_ALONG_VECTOR)
+    aCI = new GEOMImpl_IPipeBiNormal (aFunction);
+  else
+    return 0;
 
-  if (aType == PIPE_BASE_PATH) {
-    Handle(GEOM_Function) aRefBase = aCI.GetBase();
-    Handle(GEOM_Function) aRefPath = aCI.GetPath();
-    TopoDS_Shape aShapeBase = aRefBase->GetValue();
+  TopoDS_Wire aWirePath;
+  if (aType != PIPE_SHELLS_WITHOUT_PATH) {
+    // working with path
+    Handle(GEOM_Function) aRefPath = aCI->GetPath();
     TopoDS_Shape aShapePath = aRefPath->GetValue();
-    if (aShapeBase.IsNull() || aShapePath.IsNull()) {
-      Standard_NullObject::Raise("MakePipe aborted : null shape argument");
+
+    if (aShapePath.IsNull()) {
+      MESSAGE ("Driver : path is null");
+      if (aCI) delete aCI;
+      Standard_NullObject::Raise("MakePipe aborted : null path argument");
     }
 
     // Get path contour
-    TopoDS_Wire aWire;
-    if (aShapePath.ShapeType() == TopAbs_WIRE) {
-      aWire = TopoDS::Wire(aShapePath);
-    } else {
+    bool isOk = false;
+    if (aShapePath.ShapeType() == TopAbs_COMPOUND) {
+      TopTools_SequenceOfShape anEdges;
+      TopExp_Explorer anExp;
+      BRep_Builder B;
+      TopoDS_Wire W;
+      B.MakeWire(W);
+      for (anExp.Init(aShapePath, TopAbs_EDGE); anExp.More(); anExp.Next()) {
+        B.Add(W, anExp.Current());
+        isOk = true;
+      }
+      if (isOk)
+        aWirePath = W;
+    }
+    else if (aShapePath.ShapeType() == TopAbs_WIRE) {
+      aWirePath = TopoDS::Wire(aShapePath);
+      isOk = true;
+    }
+    else {
       if (aShapePath.ShapeType() == TopAbs_EDGE) {
         TopoDS_Edge anEdge = TopoDS::Edge(aShapePath);
-        aWire = BRepBuilderAPI_MakeWire(anEdge);
-      } else {
-        Standard_TypeMismatch::Raise("MakePipe aborted : path shape is neither a wire nor an edge");
+        aWirePath = BRepBuilderAPI_MakeWire(anEdge);
+        isOk = true;
       }
     }
+    if (!isOk) {
+      if (aCI) delete aCI;
+      Standard_TypeMismatch::Raise("MakePipe aborted : path shape is neither a wire nor an edge");
+    }
+  }
+
+  TopoDS_Shape aShape;
+
+  if (aType == PIPE_BASE_PATH) {
+    Handle(GEOM_Function) aRefBase = aCI->GetBase();
+    TopoDS_Shape aShapeBase;
+
+    // Make copy to prevent modifying of base object 0020766 : EDF 1320
+    BRepBuilderAPI_Copy Copy(aRefBase->GetValue());
+    if (Copy.IsDone())
+      aShapeBase = Copy.Shape();
+
+    if (aShapeBase.IsNull()) {
+      if (aCI) delete aCI;
+      Standard_NullObject::Raise("MakePipe aborted : null base argument");
+    }
 
     // Make pipe
-    aShape = BRepOffsetAPI_MakePipe(aWire, aShapeBase);
+    if (aShapeBase.ShapeType() == TopAbs_EDGE ||
+        aShapeBase.ShapeType() == TopAbs_WIRE)
+    {
+      TopoDS_Wire Profile;
+      if (aShapeBase.ShapeType() == TopAbs_WIRE)
+        Profile = TopoDS::Wire(aShapeBase);
+      else
+      {
+        BRep_Builder BB;
+        BB.MakeWire(Profile);
+        BB.Add(Profile, aShapeBase);
+      }
+
+      BRepOffsetAPI_MakePipeShell Sweep (aWirePath);
+      BRepBuilderAPI_MakeFace FaceBuilder (aWirePath, Standard_True); //to find the plane of spine
+      if (FaceBuilder.IsDone())
+        Sweep.SetMode(FaceBuilder.Face());
+      Sweep.Add(Profile);
+      Sweep.Build();
+      
+      if (!Sweep.IsDone())
+      {
+        if (aCI) delete aCI;
+        Standard_ConstructionError::Raise("MakePipeShell failed");
+      }
+      else
+        aShape = Sweep.Shape(); //result is good
+      
+    }
+    else
+      aShape = BRepOffsetAPI_MakePipe(aWirePath, aShapeBase);
   }
-  else {
+
+  //building pipe with different sections
+  else if (aType == PIPE_DIFFERENT_SECTIONS) {
+    GEOMImpl_IPipeDiffSect* aCIDS = (GEOMImpl_IPipeDiffSect*)aCI;
+    Handle(TColStd_HSequenceOfTransient) aBasesObjs = aCIDS->GetBases ();
+    Handle(TColStd_HSequenceOfTransient) aLocObjs = aCIDS->GetLocations ();
+    Standard_Boolean aWithContact = (aCIDS->GetWithContactMode());
+    Standard_Boolean aWithCorrect = (aCIDS->GetWithCorrectionMode());
+    if (aCI) {
+      delete aCI;
+      aCI = 0;
+    }
+
+    Standard_Integer nbBases = aBasesObjs->Length();
+    Standard_Integer nbLocs  = (aLocObjs.IsNull() ? 0 : aLocObjs->Length());
+
+    Handle(TopTools_HSequenceOfShape) aHSeqBases = new TopTools_HSequenceOfShape;
+    Handle(TopTools_HSequenceOfShape) aHSeqLocs  = new TopTools_HSequenceOfShape;
+    Standard_Integer i;
+
+    for (i = 1; i <= nbBases; i++) {
+      Handle(Standard_Transient) anItem = aBasesObjs->Value(i);
+      if (anItem.IsNull())
+        continue;
+      Handle(GEOM_Function) aRefBase = Handle(GEOM_Function)::DownCast(anItem);
+      if (aRefBase.IsNull())
+        continue;
+      if (aRefBase->GetValue().IsNull())
+        continue;
+
+      aHSeqBases->Append(aRefBase->GetValue());
+    }
+    for (i = 1; i <= nbLocs; i++) {
+      Handle(Standard_Transient) anItemLoc = aLocObjs->Value(i);
+      if (anItemLoc.IsNull())
+        continue;
+      Handle(GEOM_Function) aRefLoc = Handle(GEOM_Function)::DownCast(anItemLoc);
+      TopoDS_Shape aShapeLoc = aRefLoc->GetValue();
+      if (aShapeLoc.IsNull() || aShapeLoc.ShapeType() != TopAbs_VERTEX)
+        continue;
+
+      aHSeqLocs->Append(aShapeLoc);
+    }
+
+    aShape = CreatePipeWithDifferentSections(aWirePath, aHSeqBases, aHSeqLocs, aWithContact, aWithCorrect);
+  }
+
+  //building pipe with shell sections
+  else if (aType == PIPE_SHELL_SECTIONS) {
+    aShape = CreatePipeForShellSections(aWirePath,aCI);
+  }
+
+  //building pipe shell sections without path
+  else if (aType == PIPE_SHELLS_WITHOUT_PATH) {
+    aShape = CreatePipeShellsWithoutPath(aCI);
+  }
+
+  //building a pipe with constant bi-normal along given vector
+  else if (aType == PIPE_BI_NORMAL_ALONG_VECTOR) {
+    aShape = CreatePipeBiNormalAlongVector(aWirePath, aCI);
+  }
+
+  if (aCI) {
+    delete aCI;
+    aCI = 0;
   }
 
   if (aShape.IsNull()) return 0;
 
   BRepCheck_Analyzer ana (aShape, Standard_False);
   if (!ana.IsValid()) {
-    Standard_ConstructionError::Raise("Algorithm have produced an invalid shape result");
+    ShapeFix_ShapeTolerance aSFT;
+    aSFT.LimitTolerance(aShape,Precision::Confusion(),Precision::Confusion());
+    Handle(ShapeFix_Shape) aSfs = new ShapeFix_Shape(aShape);
+    aSfs->SetPrecision(Precision::Confusion());
+    aSfs->Perform();
+    aShape = aSfs->Shape();
+
+    ana.Init(aShape, Standard_False);
+    if (!ana.IsValid())
+      Standard_ConstructionError::Raise("Algorithm have produced an invalid shape result");
   }
 
-  aFunction->SetValue(aShape);
+  // Glue (for bug 0020207)
+  // No gluing is needed as the bug 0020207 is fixed in OCCT.
+#ifdef GLUE_0020207
+  TopExp_Explorer anExpV (aShape, TopAbs_VERTEX);
+  if (anExpV.More()) {
+    Standard_Real aVertMaxTol = -RealLast();
+    for (; anExpV.More(); anExpV.Next()) {
+      TopoDS_Vertex aVertex = TopoDS::Vertex(anExpV.Current());
+      Standard_Real aTol = BRep_Tool::Tolerance(aVertex);
+      if (aTol > aVertMaxTol)
+        aVertMaxTol = aTol;
+    }
+    aVertMaxTol += Precision::Confusion();
+    aShape = GEOMImpl_GlueDriver::GlueFaces(aShape, aVertMaxTol, Standard_True);
+    //aShape = GEOMImpl_GlueDriver::GlueFaces(aShape, Precision::Confusion(), Standard_True);
+  }
+#endif
 
-  log.SetTouched(Label());
+  TopoDS_Shape aRes = GEOMUtils::CompsolidToCompound(aShape);
+  aFunction->SetValue(aRes);
 
+  log.SetTouched(Label());
   return 1;
 }
 
-
 //=======================================================================
 //function :  GEOMImpl_PipeDriver_Type_
 //purpose  :
 //=======================================================================
 Standard_EXPORT Handle_Standard_Type& GEOMImpl_PipeDriver_Type_()
 {
-
   static Handle_Standard_Type aType1 = STANDARD_TYPE(TFunction_Driver);
-  if ( aType1.IsNull()) aType1 = STANDARD_TYPE(TFunction_Driver);
+  if (aType1.IsNull()) aType1 = STANDARD_TYPE(TFunction_Driver);
   static Handle_Standard_Type aType2 = STANDARD_TYPE(MMgt_TShared);
-  if ( aType2.IsNull()) aType2 = STANDARD_TYPE(MMgt_TShared);
+  if (aType2.IsNull()) aType2 = STANDARD_TYPE(MMgt_TShared);
   static Handle_Standard_Type aType3 = STANDARD_TYPE(Standard_Transient);
-  if ( aType3.IsNull()) aType3 = STANDARD_TYPE(Standard_Transient);
-
+  if (aType3.IsNull()) aType3 = STANDARD_TYPE(Standard_Transient);
 
   static Handle_Standard_Transient _Ancestors[]= {aType1,aType2,aType3,NULL};
   static Handle_Standard_Type _aType = new Standard_Type("GEOMImpl_PipeDriver",
-                                                        sizeof(GEOMImpl_PipeDriver),
-                                                        1,
-                                                        (Standard_Address)_Ancestors,
-                                                        (Standard_Address)NULL);
+                                                         sizeof(GEOMImpl_PipeDriver),
+                                                         1,
+                                                         (Standard_Address)_Ancestors,
+                                                         (Standard_Address)NULL);
 
   return _aType;
 }
@@ -135,5 +2545,5 @@ const Handle(GEOMImpl_PipeDriver) Handle(GEOMImpl_PipeDriver)::DownCast(const Ha
      }
   }
 
-  return _anOtherObject ;
+  return _anOtherObject;
 }