X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FHYDROData%2FHYDROData_PolylineOperator.cxx;h=07387a6e9d0cf085fba22e6aca6e2ee26cee61fc;hb=0f4c16e80e5c9160fb6e240e3f09b151701a1e5b;hp=ed7a4a93fe558a958bbe7a5d2476eb3540fd11ce;hpb=870e07f3ae73696273c54934f17d86f4f030c6d5;p=modules%2Fhydro.git

diff --git a/src/HYDROData/HYDROData_PolylineOperator.cxx b/src/HYDROData/HYDROData_PolylineOperator.cxx
index ed7a4a93..07387a6e 100644
--- a/src/HYDROData/HYDROData_PolylineOperator.cxx
+++ b/src/HYDROData/HYDROData_PolylineOperator.cxx
@@ -18,22 +18,45 @@
 
 #include <HYDROData_PolylineOperator.h>
 #include <HYDROData_Document.h>
+#include <HYDROData_TopoCurve.h>
+#include <HYDROData_Object.h>
+
+#ifndef LIGHT_MODE
+#include <CurveCreator_Utils.hxx>
+#endif
+
 #include <BRepAdaptor_Curve.hxx>
 #include <BRep_Builder.hxx>
+#include <BRep_Tool.hxx>
 #include <BRepBuilderAPI_MakeEdge2d.hxx>
+#include <BRepBuilderAPI_MakeEdge.hxx>
 #include <BRepBuilderAPI_MakeWire.hxx>
+#include <Extrema_ExtCC.hxx>
 #include <Extrema_ExtPC.hxx>
+#include <GeomAPI_Interpolate.hxx>
 #include <NCollection_Vector.hxx>
 #include <Precision.hxx>
 #include <ShapeAnalysis_TransferParametersProj.hxx>
 #include <ShapeBuild_Edge.hxx>
+#include <TColgp_Array1OfVec.hxx>
+#include <TColgp_HArray1OfPnt.hxx>
+#include <TColStd_HArray1OfBoolean.hxx>
 #include <TopoDS.hxx>
 #include <TopoDS_Edge.hxx>
 #include <TopoDS_Wire.hxx>
 #include <TopExp.hxx>
 #include <TopExp_Explorer.hxx>
 #include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
-#include <QString>
+#include <QStringList>
+#include <QColor>
+#include <Geom_BSplineCurve.hxx>
+#include <TopTools_IndexedMapOfShape.hxx>
+#include <BRepLib_MakeWire.hxx>
+
+#define _DEVDEBUG_
+#include "HYDRO_trace.hxx"
+#include <BRepTools.hxx>
+#include <sstream>
 
 template<class T> void append( std::vector<T>& theList, const std::vector<T>& theList2 )
 {
@@ -53,14 +76,21 @@ bool HYDROData_PolylineOperator::Split( const Handle( HYDROData_Document )& theD
                                         const gp_Pnt2d& thePoint,
                                         double theTolerance ) const
 {
+  if (thePolyline.IsNull())
+  {
+    return false;
+  }
+
   std::vector<gp_Pnt2d> aPointsList( 1 );
   aPointsList[0] = thePoint;
-  std::vector<TopoDS_Wire> aCurves = GetWires( thePolyline );
+  std::vector<TopoDS_Wire> aCurves;
+  GetWires(thePolyline, aCurves);
   bool isOK = true;
   for( int i=0, n=aCurves.size(); i<n; i++ )
   {
-    std::vector<TopoDS_Shape> aCurvesList = Split( aCurves[i], thePoint, theTolerance );
-    bool isLocalOK = CreatePolylines( theDoc, thePolyline->GetName(), aCurvesList, true );
+    std::vector<TopoDS_Shape> aCurvesList;
+    Split( aCurves[i], thePoint, theTolerance, aCurvesList );
+    bool isLocalOK = CreatePolylines( theDoc, thePolyline, aCurvesList, true );
     isOK = isOK && isLocalOK;
   }
   return isOK;
@@ -69,11 +99,17 @@ bool HYDROData_PolylineOperator::Split( const Handle( HYDROData_Document )& theD
 bool HYDROData_PolylineOperator::Split( const Handle( HYDROData_Document )& theDoc,
               const Handle( HYDROData_PolylineXY )& thePolyline,
               const Handle( HYDROData_PolylineXY )& theTool,
-              double theTolerance ) const
+              double theTolerance,
+              bool& theIsIntersected) const
 {
+  if (thePolyline.IsNull() || theTool.IsNull())
+  {
+    return false;
+  }
+
   HYDROData_SequenceOfObjects aSeq;
   aSeq.Append( theTool );
-  return split( theDoc, thePolyline, aSeq, theTolerance, -1 );
+  return split( theDoc, thePolyline, aSeq, theTolerance, -1, theIsIntersected);
 }
 
 bool HYDROData_PolylineOperator::Split( const Handle( HYDROData_Document )& theDoc,
@@ -84,7 +120,8 @@ bool HYDROData_PolylineOperator::Split( const Handle( HYDROData_Document )& theD
   for( int i=f; i<=l; i++ )
   {
     Handle( HYDROData_PolylineXY ) aPolyline = Handle( HYDROData_PolylineXY )::DownCast( thePolylines.Value( i ) );
-    if( !split( theDoc, aPolyline, thePolylines, theTolerance, i ) )
+    bool isIntersected;
+    if( !split( theDoc, aPolyline, thePolylines, theTolerance, i, isIntersected) )
       return false;
   }
   return true;
@@ -96,29 +133,47 @@ bool HYDROData_PolylineOperator::Merge( const Handle( HYDROData_Document )& theD
                                         bool isConnectByNewSegment,
                                         double theTolerance )
 {
-  TopoDS_Shape aMergedPolyline;
+  Handle( HYDROData_PolylineXY ) aNewPolyline =
+    Handle( HYDROData_PolylineXY )::DownCast( theDoc->CreateObject( KIND_POLYLINEXY ) );
+  int ins =0;
 
-  int f = thePolylines.Lower(), l = thePolylines.Upper();
-  for( int i=f; i<=l; i++ )
+  HYDROData_SequenceOfObjects::Iterator aPIt(thePolylines);
+
+  for (int ip=1; aPIt.More(); aPIt.Next(), ip++)
   {
-    Handle( HYDROData_PolylineXY ) aPolyline = Handle( HYDROData_PolylineXY )::DownCast( thePolylines.Value( i ) );
-    std::vector<TopoDS_Wire> aCurves = GetWires( aPolyline );
-    for( int j=0, m=aCurves.size(); j<m; j++ )
-      if( !Merge( aMergedPolyline, aCurves[j], isConnectByNewSegment, theTolerance ) )
-        return false;
+    Handle(HYDROData_PolylineXY) aPolyline =
+      Handle(HYDROData_PolylineXY)::DownCast(aPIt.Value());
+    NCollection_Sequence<TCollection_AsciiString>           aSectNames;
+    NCollection_Sequence<HYDROData_PolylineXY::SectionType> aSectTypes;
+    NCollection_Sequence<bool>                              aSectClosures;
+    aPolyline->GetSections( aSectNames, aSectTypes, aSectClosures );
+
+    for ( int i = 1, n = aSectNames.Size(); i <= n; ++i )
+    {
+      const TCollection_AsciiString& aSectName = aSectNames.Value( i ) + "_" + ip;
+      const HYDROData_PolylineXY::SectionType& aSectType = aSectTypes.Value( i );
+      bool aSectClosure = aSectClosures.Value( i );
+      aNewPolyline->AddSection(aSectName, aSectType, aSectClosure);
+      HYDROData_PolylineXY::PointsList aPointsList = aPolyline->GetPoints(i-1, false);
+      aNewPolyline->SetPoints(ins++, aPointsList);
+    }
   }
+  QString aName = theName;
+  if( aName.isEmpty() )
+    {
+      aName = "merged";
+      int anIndex = 1;
+      QString aNewName = aName + "_" + QString::number(anIndex);
+      while (!theDoc->FindObjectByName(aNewName).IsNull())  // the object with such a name is not found
+        {
+          anIndex++;
+          aNewName = aName + "_" + QString::number(anIndex);
+        }
+      aName = aNewName;
+    }
 
-  std::vector<TopoDS_Shape> aShapes( 1 );
-  aShapes[0] = aMergedPolyline;
-  CreatePolylines( theDoc, theName, aShapes, false );
-
-  return true;
-}
-
-bool HYDROData_PolylineOperator::Merge( TopoDS_Shape& theShape, const TopoDS_Wire& theWire, 
-                                        bool isConnectByNewSegment, double theTolerance )
-{
-  //TODO
+  aNewPolyline->SetName(aName);
+  aNewPolyline->Update();
   return true;
 }
 
@@ -126,412 +181,346 @@ bool HYDROData_PolylineOperator::split( const Handle( HYDROData_Document )& theD
                                         const Handle( HYDROData_PolylineXY )& thePolyline,
                                         const HYDROData_SequenceOfObjects& theTools,
                                         double theTolerance,
-                                        int theIgnoreIndex ) const
+                                        int theIgnoreIndex,
+                                        bool& theIsIntersected) const
 {
-  std::vector<TopoDS_Wire> aCurves = GetWires( thePolyline );
+  theIsIntersected = false;
+
+  if (thePolyline.IsNull())
+  {
+    return false;
+  }
+
+  std::vector<TopoDS_Wire> aCurves;
+  GetWires(thePolyline, aCurves);
   std::vector<TopoDS_Wire> aToolCurves;
   for( int i=theTools.Lower(), n=theTools.Upper(); i<=n; i++ )
     if( i!=theIgnoreIndex )
     {
       Handle( HYDROData_PolylineXY ) aToolPolyline = 
         Handle( HYDROData_PolylineXY )::DownCast( theTools.Value( i ) );
-      append( aToolCurves, GetWires( aToolPolyline ) );
+      if (!aToolPolyline.IsNull())
+      {
+        std::vector<TopoDS_Wire> aTCurves;
+        GetWires(aToolPolyline, aTCurves);
+        append( aToolCurves, aTCurves);
+      }
     }
 
-  bool isOK = true;
-
-  int n = aCurves.size();
-  std::vector<TopoDS_Shape> aResults( n );
-  for( int i=0; i<n; i++ )
-    aResults[i] = aCurves[i];
+  if (aToolCurves.empty())
+  {
+    return false;
+  }
 
-  for( int j=0, m=aToolCurves.size(); j<m; j++ )
+  const int aPSCount = aCurves.size();
+  const int aTSCount = aToolCurves.size();
+  std::vector<TopoDS_Shape> aResult;
+  for (int aPSI = 0; aPSI < aPSCount; ++aPSI)
   {
-    std::vector<TopoDS_Shape> aNewResults;
-    for( int k=0, q=aResults.size(); k<q; k++ )
+    HYDROData_TopoCurve aCurve;
+    //DEBTRACE("Initialize curve " << aPSI);
+    if (!aCurve.Initialize(aCurves[aPSI]))
     {
-      std::vector<TopoDS_Shape> aCurvesList = Split( TopoDS::Wire( aResults[k] ), aToolCurves[j], theTolerance );
-      append( aNewResults, aCurvesList );
+      continue;
     }
-    aResults = aNewResults;
-  }
 
-  CreatePolylines( theDoc, thePolyline->GetName(), aResults, true );
+    std::deque<std::list<double> > aParams;
+    for (int aTSI = 0; aTSI < aTSCount; ++aTSI)
+    {
+      aCurve.Intersect(aToolCurves[aTSI], aParams);
+    }
 
-  return isOK;
+    std::deque<HYDROData_TopoCurve> aSplitCurves;
+    theIsIntersected |= aCurve.Cut(aParams, aSplitCurves);
+    std::deque<HYDROData_TopoCurve>::const_iterator aCIt =
+      aSplitCurves.begin();
+    std::deque<HYDROData_TopoCurve>::const_iterator aLastCIt =
+      aSplitCurves.end();
+    for (int iw=0; aCIt != aLastCIt; ++aCIt, iw++)
+    {
+      /*std::stringstream brepName;
+      brepName << "theSplitWire_";
+      brepName << iw;
+      brepName << ".brep";
+      BRepTools::Write(aCIt->Wire() , brepName.str().c_str() );*/
+      aResult.push_back(aCIt->Wire());
+    }
+  }
+
+  CreatePolylines( theDoc, thePolyline, aResult, true );
+  return true;
 }
 
-std::vector<TopoDS_Wire> HYDROData_PolylineOperator::GetWires( const Handle( HYDROData_PolylineXY )& thePolyline )
+void HYDROData_PolylineOperator::GetWires(
+  const Handle( HYDROData_PolylineXY )& thePolyline,
+  std::vector<TopoDS_Wire>& theWires)
 {
-  std::vector<TopoDS_Wire> aResult;
-
   TopoDS_Shape aShape = thePolyline->GetShape();
-
   if( aShape.ShapeType()==TopAbs_WIRE )
   {
-    aResult.push_back( TopoDS::Wire( aShape ) );
+    theWires.push_back( TopoDS::Wire( aShape ) );
   }
   else
   {
     TopExp_Explorer anExp( aShape, TopAbs_WIRE );
     for( ; anExp.More(); anExp.Next() )
     {
-      aResult.push_back( TopoDS::Wire( anExp.Current() ) );
+      theWires.push_back( TopoDS::Wire( anExp.Current() ) );
     }
   }
-  return aResult;
 }
 
-static Standard_Boolean OrderCurveEdges(
+void HYDROData_PolylineOperator::Split(
   const TopoDS_Wire& theWire,
-  NCollection_Vector<TopoDS_Edge>& theEdges,
-  Standard_Boolean& theIsClosed)
+  const gp_Pnt2d& thePoint,
+  double theTolerance,
+  std::vector<TopoDS_Shape>& theWires)
 {
-  TopTools_IndexedDataMapOfShapeListOfShape aVertexToEdges;
-  TopExp::MapShapesAndAncestors(theWire,
-    TopAbs_VERTEX, TopAbs_EDGE, aVertexToEdges);
-  const Standard_Integer aVCount = aVertexToEdges.Extent();
-  if (aVCount == 0)
+  HYDROData_TopoCurve aCurve;
+  if (!aCurve.Initialize(theWire))
   {
-    return Standard_False;
+    theWires.push_back(theWire);
+    return;
   }
 
+  const gp_XYZ aP(thePoint.X(), thePoint.Y(), 0);
+  std::list<TopoDS_Edge>::const_iterator aEPos;
+  double aParam;
+  aCurve.Project(aP, aEPos, aParam);
+  HYDROData_TopoCurve aCurve1, aCurve2;
+  aCurve.Cut(aEPos, aParam, aCurve1, aCurve2);
+  theWires.push_back(aCurve1.Wire());
+  if (!aCurve2.IsEmpty())
   {
-    Standard_Integer aEndCount = 0;
-    for (Standard_Integer aVN = 1; aVN <= aVCount; ++aVN)
-    {
-      const Standard_Integer aEdgeCount =
-        aVertexToEdges.FindFromIndex(aVN).Extent();
-      if (aEdgeCount == 1)
-      {
-        ++aEndCount;
-      }
-      if (aEdgeCount > 2)
-      {
-        return Standard_False;
-      }
-    }
-    theIsClosed = (aEndCount == 0);
-    if (!theIsClosed && aEndCount != 2)
-    {
-      return Standard_False;
-    }
+    theWires.push_back(aCurve2.Wire());
   }
+}
 
-  Standard_Integer aVN = 1;
-  if (!theIsClosed)
-  {
-    while (aVN <= aVCount &&
-      aVertexToEdges.FindFromIndex(aVN).Extent() == 2)
-    {
-      ++aVN;
-    }
-  }
+bool HYDROData_PolylineOperator::CreatePolylines( const Handle( HYDROData_Document )& theDoc,
+                                                  const Handle( HYDROData_PolylineXY )& theOldPolyline,
+                                                  const std::vector<TopoDS_Shape>& theShapes,
+                                                  bool isUseIndices )
+{
+  if( theDoc.IsNull() )
+    return false;
 
-  TopTools_ListOfShape* aEdges = &aVertexToEdges.ChangeFromIndex(aVN);
-  while (!aEdges->IsEmpty())
+  if ( theOldPolyline.IsNull() )
+    return false;
+  const QString& theNamePrefix = theOldPolyline->GetName();
+  const QColor& theColor = theOldPolyline->GetWireColor();
+
+  int n = theShapes.size();
+  //DEBTRACE("theShapes.size() "<< n);
+  int anIndex = 1;
+  for( int i=0; i<n; i++ )
   {
-    const TopoDS_Edge aEdge = TopoDS::Edge(aEdges->First());
-    aEdges->RemoveFirst();
-    theEdges.Append(aEdge);
-    Standard_Integer aVN2 =
-      aVertexToEdges.FindIndex(TopExp::FirstVertex(aEdge));
-    if (aVN2 == aVN)
-    {
-      aVN2 = aVertexToEdges.FindIndex(TopExp::LastVertex(aEdge));
-    }
-    aVN = aVN2;
+    Handle( HYDROData_PolylineXY ) aPolyline = 
+      Handle( HYDROData_PolylineXY )::DownCast( theDoc->CreateObject( KIND_POLYLINEXY ) );
+    if( aPolyline.IsNull() )
+      return false;
 
-    aEdges = &aVertexToEdges.ChangeFromIndex(aVN2);
-    if (aEdges->First().IsEqual(aEdge))
-    {
-      aEdges->RemoveFirst();
-    }
-    else
-    {
-      const TopoDS_Edge aEdge = TopoDS::Edge(aEdges->First());
-      aEdges->Clear();
-      aEdges->Append(aEdge);
-    }
-  }
-  return (!theIsClosed && theEdges.Size() == aVCount - 1) ||
-    (theIsClosed && theEdges.Size() == aVCount);
-}
+    aPolyline->ImportShape(theShapes[i], false, theOldPolyline, false);
 
-static Standard_Real ProjectPointToEdge(
-  const gp_Pnt& thePoint,
-  const TopoDS_Edge& theEdge,
-  Standard_Real& theParameter)
-{
-  BRepAdaptor_Curve aECurve(theEdge);
-  Extrema_ExtPC aAlgo(thePoint, aECurve);
-  Standard_Integer aMinEN = -2;
-  Standard_Real aMinSqDist = DBL_MAX;
-  if (aAlgo.IsDone())
-  {
-    const Standard_Integer aECount = aAlgo.NbExt();
-    if (aECount != 0)
+    if( isUseIndices )
     {
-      for (Standard_Integer aEN = 1; aEN <= aECount; ++aEN)
+      QString aNewName = theNamePrefix + "_" + QString::number( anIndex );
+      while( !theDoc->FindObjectByName( aNewName ).IsNull() )  // the object with such a name is not found
       {
-        const gp_Pnt& aP = aAlgo.Point(aEN).Value();
-        const Standard_Real aSqDist = thePoint.SquareDistance(aP);
-        if (aMinSqDist > aSqDist)
-        {
-          aMinSqDist = aSqDist;
-          aMinEN = aEN;
-        }
+        anIndex++;
+        aNewName = theNamePrefix + "_" + QString::number( anIndex );
       }
+      aPolyline->SetName( aNewName );
     }
-  }
-
-  const Standard_Real aParams[] =
-    {aECurve.FirstParameter(), aECurve.LastParameter()};
-  const gp_Pnt aEnds[] = {aECurve.Value(aParams[0]), aECurve.Value(aParams[1])};
-  const Standard_Real aSqDists[] =
-    {thePoint.SquareDistance(aEnds[0]), thePoint.SquareDistance(aEnds[1])};
-  for (Standard_Integer aEI = 0; aEI < 2; ++aEI)
-  {
-    if (aMinSqDist > aSqDists[aEI])
+    else
     {
-      aMinSqDist = aSqDists[aEI];
-      aMinEN = -aEI;
+      aPolyline->SetName( theNamePrefix );
     }
-  }
 
-  if (aMinEN <= 0)
-  {
-    theParameter = aParams[-aMinEN];
-    return aMinSqDist;
+    if( theColor.isValid() )
+      aPolyline->SetWireColor( theColor );
   }
-
-  const Extrema_POnCurv& aPOnC = aAlgo.Point(aMinEN);
-  const gp_Pnt& aPoint = aPOnC.Value();
-  theParameter = aPOnC.Parameter();
-  for (Standard_Integer aEI = 0; aEI < 2; ++aEI)
-  {
-    if (Abs(theParameter - aParams[aEI]) < Precision::PConfusion() ||
-      aPoint.SquareDistance(aEnds[aEI]) < Precision::SquareConfusion())
-    {
-      theParameter = aParams[aEI];
-    }
-  }
-  return aMinSqDist;
+  return true;
 }
 
-static void SplitCurveByPoint(
-  const NCollection_Vector<TopoDS_Edge>& theEdges,
-  const Standard_Integer theEdgeIndex,
-  const Standard_Real theParameter,
-  NCollection_Vector<TopoDS_Edge>& theEdges1,
-  NCollection_Vector<TopoDS_Edge>& theEdges2)
+double HYDROData_PolylineOperator::ReduceDeflection(
+  const double theDeflection,
+  HYDROData_TopoCurve& theCurve,
+  int& thePieceCount)
 {
-  for (Standard_Integer aEI = 0; aEI < theEdgeIndex; ++aEI)
+  // Construct the approximating B-spline.
+  std::list<gp_XYZ> aPs;
+  if (!theCurve.ValuesInKnots(aPs))
   {
-    theEdges1.Append(theEdges(aEI));
+    return -1;
   }
 
-  const TopoDS_Edge& aEdge = theEdges(theEdgeIndex);
-  BRepAdaptor_Curve aECurve(aEdge);
-  Standard_Integer aParamI = -1;
-  const Standard_Real aEdgeEndParams[] =
-    {aECurve.FirstParameter(), aECurve.LastParameter()};
-  if (Abs(theParameter - aEdgeEndParams[0]) < Precision::PConfusion())
+  Handle(TColgp_HArray1OfPnt) aPs2 = new TColgp_HArray1OfPnt(1, aPs.size());
   {
-    aParamI = 0;
-  }
-  else if (Abs(theParameter - aEdgeEndParams[1]) < Precision::PConfusion())
-  {
-    aParamI = 1;
-  }
-
-  const TopAbs_Orientation aOrient = aEdge.Orientation();
-  if (aOrient == TopAbs_REVERSED)
-  {
-    aParamI ^= 1;
-  }
-
-  const Standard_Integer aECount = theEdges.Size();
-  if (aParamI == 0)
-  {
-    NCollection_Vector<TopoDS_Edge>* aEdges = (theEdgeIndex != 0) ? &theEdges1 : &theEdges2;
-    for (Standard_Integer aEI = theEdgeIndex; aEI < aECount; ++aEI)
+    std::list<gp_XYZ>::const_iterator aLastPIt = aPs.end();
+    std::list<gp_XYZ>::const_iterator aPIt = aPs.begin();
+    for (int aPN = 1; aPIt != aLastPIt; ++aPN, ++aPIt)
     {
-      aEdges->Append(theEdges(aEI));
+      aPs2->SetValue(aPN, *aPIt);
     }
   }
-  else if (aParamI == 1)
+  Handle(Geom_BSplineCurve) aBSpline2;
+  const bool isClosed = theCurve.IsClosed();
+#ifndef LIGHT_MODE
+  if (!CurveCreator_Utils::constructBSpline(aPs2, isClosed, aBSpline2))
+#endif
   {
-    theEdges1.Append(aEdge);
-    for (Standard_Integer aEI = theEdgeIndex; aEI < aECount; ++aEI)
-    {
-      theEdges2.Append(theEdges(aEI));
-    }
+    return -1;
   }
-  else
+
+  // Calculate the piece deflections.
+  std::deque<double> aSqDefls;
+  double aMaxSqDefl = 0;
+  std::list<TopoDS_Edge>& aEdges = theCurve.Edges();
+  std::list<TopoDS_Edge>::const_iterator aLastEIt = aEdges.end();
   {
-    TopoDS_Edge aFE = TopoDS::Edge(aEdge.Oriented(TopAbs_FORWARD));
-    ShapeAnalysis_TransferParametersProj aSATPP(aFE, TopoDS_Face());
-    aSATPP.SetMaxTolerance(Precision::Confusion());
-    TopoDS_Vertex aSplitV;
-    BRep_Builder().MakeVertex(
-      aSplitV, aECurve.Value(theParameter), Precision::Confusion());
-
-    TopoDS_Edge aEParts[] = {
-      ShapeBuild_Edge().CopyReplaceVertices(aFE, TopoDS_Vertex(),
-        TopoDS::Vertex(aSplitV.Oriented(TopAbs_REVERSED))),
-      ShapeBuild_Edge().CopyReplaceVertices(aFE, aSplitV, TopoDS_Vertex())};
-    ShapeBuild_Edge().CopyPCurves(aEParts[0], aFE);
-    ShapeBuild_Edge().CopyPCurves(aEParts[1], aFE);
-    BRep_Builder().SameRange(aEParts[0], Standard_False);
-    BRep_Builder().SameRange(aEParts[1], Standard_False);
-    BRep_Builder().SameParameter(aEParts[0], Standard_False);
-    BRep_Builder().SameParameter(aEParts[1], Standard_False);
-    aSATPP.TransferRange(aEParts[0],
-      aEdgeEndParams[0], theParameter, Standard_False);
-    aSATPP.TransferRange(aEParts[1],
-      theParameter, aEdgeEndParams[1], Standard_False);
-    aEParts[0].Orientation(aOrient);
-    aEParts[1].Orientation(aOrient);
-
-    const Standard_Integer aFirstPI = (aOrient != TopAbs_REVERSED) ? 0 : 1;
-    theEdges1.Append(aEParts[aFirstPI]);
-    theEdges2.Append(aEParts[1 - aFirstPI]);
-
-    for (Standard_Integer aEI = theEdgeIndex + 1; aEI < aECount; ++aEI)
+    std::list<TopoDS_Edge>::const_iterator aEIt = aEdges.begin();
+    for (int aPrevKCount = 0; aEIt != aLastEIt; ++aEIt)
     {
-      theEdges2.Append(theEdges(aEI));
+      TopLoc_Location aLoc;
+      double aParams[2];
+      Handle(Geom_BSplineCurve) aBSpline = Handle(Geom_BSplineCurve)::DownCast(
+        BRep_Tool::Curve(*aEIt, aLoc, aParams[0], aParams[1]));
+      const int aKCount = aBSpline->NbKnots();
+      for (int aKN = 1; aKN < aKCount; ++aKN)
+      {
+        const double aParam =
+          (aBSpline->Knot(aKN) + aBSpline->Knot(aKN + 1)) * 0.5;
+        const double aParam2 = (aBSpline2->Knot(aPrevKCount + aKN) +
+          aBSpline2->Knot(aPrevKCount + aKN + 1)) * 0.5;
+        const double aSqDefl = Abs(aBSpline->Value(aParam).
+          SquareDistance(aBSpline2->Value(aParam2)));
+        aSqDefls.push_back(aSqDefl);
+        if (aMaxSqDefl < aSqDefl)
+        {
+          aMaxSqDefl = aSqDefl;
+        }
+      }
+      aPrevKCount += aKCount - 1;
     }
   }
-}
 
-static void CollectCurveWire(
-  const NCollection_Vector<TopoDS_Edge>& theEdges, TopoDS_Wire& theWire)
-{
-  BRep_Builder aBulder;
-  aBulder.MakeWire(theWire);
-  NCollection_Vector<TopoDS_Edge>::Iterator aEIt(theEdges);
-  for (; aEIt.More(); aEIt.Next())
+  // Check whether the reducing is necessary.
+  const double aMaxDefl = Sqrt(aMaxSqDefl);
+  if (aMaxDefl <= theDeflection)
   {
-    aBulder.Add(theWire, aEIt.Value());
+    return aMaxDefl;
   }
-}
 
-static void CollectCurveWire(
-  const NCollection_Vector<TopoDS_Edge>& theEdges1,
-  const NCollection_Vector<TopoDS_Edge>& theEdges2,
-  TopoDS_Wire& theWire)
-{
-  BRep_Builder aBulder;
-  aBulder.MakeWire(theWire);
-  const NCollection_Vector<TopoDS_Edge>* aEdges[] = {&theEdges1, &theEdges2};
-  for (Standard_Integer aEI = 0; aEI < 2; ++aEI)
+  // Reduce the deflections.
+  const double aThresSqDefl =
+    Max(aMaxSqDefl * 0.25, theDeflection * theDeflection);
+  std::list<TopoDS_Edge>::iterator aEIt = aEdges.begin();
+  std::deque<double>::const_iterator aSqDIt = aSqDefls.begin();
+  thePieceCount = 0;
+  for (; aEIt != aLastEIt; ++aEIt)
   {
-    NCollection_Vector<TopoDS_Edge>::Iterator aEIt(*aEdges[aEI]);
-    for (; aEIt.More(); aEIt.Next())
+    TopLoc_Location aLoc;
+    double aParams[2];
+    Handle(Geom_BSplineCurve) aBSpline = Handle(Geom_BSplineCurve)::DownCast(
+      BRep_Tool::Curve(*aEIt, aLoc, aParams[0], aParams[1]));
+    Handle(Geom_BSplineCurve) aBSpline2 =
+      Handle(Geom_BSplineCurve)::DownCast(aBSpline->Copy());
+    const int aKCount = aBSpline->NbKnots();
+    for (int aKN = 1; aKN < aKCount; ++aSqDIt, ++aKN)
     {
-      aBulder.Add(theWire, aEIt.Value());
+      if (*aSqDIt > aThresSqDefl)
+      {
+        aBSpline2->InsertKnot(
+          (aBSpline->Knot(aKN) + aBSpline->Knot(aKN + 1)) * 0.5);
+      }
     }
+    TopoDS_Edge aEdge;
+    BRep_Builder().MakeEdge(aEdge, aBSpline2, Precision::Confusion());
+    BRep_Builder().Add(aEdge, TopExp::FirstVertex(*aEIt));
+    BRep_Builder().Add(aEdge, TopExp::LastVertex(*aEIt));
+    thePieceCount += aBSpline2->NbKnots() - 1;
+    *aEIt = aEdge;
   }
+  return aMaxDefl;
 }
 
-std::vector<TopoDS_Shape> HYDROData_PolylineOperator::Split( const TopoDS_Wire& theWire,
-                                                             const gp_Pnt2d& thePoint,
-                                                             double theTolerance )
+bool HYDROData_PolylineOperator::Extract( const Handle(HYDROData_Document)& theDocument,
+                                          const Handle(HYDROData_Object)& theObject )
 {
-  std::vector<TopoDS_Shape> aResult;
-  NCollection_Vector<TopoDS_Edge> aEdges;
-  Standard_Boolean isClosed;
-  if (!OrderCurveEdges(theWire, aEdges, isClosed))
-  {
-    aResult.push_back(theWire);
-    return aResult;
-  }
+  if( theObject.IsNull() || theDocument.IsNull() )
+    return false;
+
+  QList<TopoDS_Shape> aBoundShapes;
+  QStringList aBoundNames;
+  QMap<QString, TopTools_IndexedMapOfShape> aNameToShMap;
+
+  theObject->GetBoundaries( aBoundShapes, aBoundNames );
 
-  const gp_Pnt aP(thePoint.X(), thePoint.Y(), 0);
-  Standard_Real aMinSqDist = DBL_MAX;
-  int aSEI = -1;
-  Standard_Real aSParam;
-  for (int aECount = aEdges.Size(), aEI = 0; aEI < aECount; ++aEI)
+  for( int i=0, n=aBoundShapes.size(); i<n; i++ )
   {
-    Standard_Real aParam;
-    const Standard_Real aSqDist =
-      ProjectPointToEdge(aP, aEdges(aEI), aParam);
-    if (aMinSqDist > aSqDist)
+    TopoDS_Shape aShape = aBoundShapes[i];
+    if( aShape.IsNull() )
+      continue;
+
+    QString aBoundName = i<aBoundNames.size() ? aBoundNames[i] : "";
+    
+    if (!aNameToShMap.contains(aBoundName))
     {
-      aMinSqDist = aSqDist;
-      aSEI = aEI;
-      aSParam = aParam;
+      TopTools_IndexedMapOfShape IM;
+      IM.Add(aShape);
+      aNameToShMap[aBoundName] = IM;
     }
+    else
+      aNameToShMap[aBoundName].Add(aShape);
+     
   }
 
-  NCollection_Vector<TopoDS_Edge> aEdges1, aEdges2;
-  SplitCurveByPoint(aEdges, aSEI, aSParam, aEdges1, aEdges2);
-  TopoDS_Wire aWire;
-  if (!isClosed)
+  foreach( QString K, aNameToShMap.keys() )
   {
-    CollectCurveWire(aEdges1, aWire);
-    if (!aEdges2.IsEmpty())
+    const TopTools_IndexedMapOfShape& IM = aNameToShMap.value(K);
+    TopTools_ListOfShape LSE;
+    for (int i = 1; i <= IM.Extent(); i++)
     {
-      aResult.push_back(aWire);
-      CollectCurveWire(aEdges2, aWire);
+      const TopoDS_Edge& E = TopoDS::Edge(IM(i));
+      if (E.IsNull())
+        continue;
+      LSE.Append(E);
     }
-  }
-  else
-  {
-    CollectCurveWire(aEdges2, aEdges1, aWire);
-  }
-  aResult.push_back(aWire);
-  return aResult;
-}
 
-std::vector<TopoDS_Shape> HYDROData_PolylineOperator::Split( const TopoDS_Wire& theWire,
-                                                             const TopoDS_Wire& theTool,
-                                                             double theTolerance )
-{
-  std::vector<TopoDS_Shape> aResult;
-  //TODO
-  return aResult;
-}
 
-std::vector<TopoDS_Shape> HYDROData_PolylineOperator::Split( const std::vector<TopoDS_Wire>& theWires,
-                                                             double theTolerance )
-{
-  std::vector<TopoDS_Shape> aResult;
-  //TODO
-  return aResult;
-}
-
-bool HYDROData_PolylineOperator::CreatePolylines( const Handle( HYDROData_Document )& theDoc,
-                                                  const QString& theNamePrefix,
-                                                  const std::vector<TopoDS_Shape>& theShapes,
-                                                  bool isUseIndices )
-{
-  if( theDoc.IsNull() )
-    return false;
+    TopoDS_Shape aShapeOut;
+    if (LSE.Extent() == 1)
+    {
+      aShapeOut = LSE.First();
+    }
+    else if (LSE.Extent() > 1)
+    {
+      BRepLib_MakeWire WM;
+      WM.Add(LSE);
+      if (WM.IsDone())
+        aShapeOut = WM.Wire();
+      else
+        continue;
+    }
+    else continue;
 
-  int n = theShapes.size();
-  int anIndex = 1;
-  for( int i=0; i<n; i++ )
-  {
     Handle( HYDROData_PolylineXY ) aPolyline = 
-      Handle( HYDROData_PolylineXY )::DownCast( theDoc->CreateObject( KIND_POLYLINEXY ) );
+      Handle( HYDROData_PolylineXY )::DownCast( theDocument->CreateObject( KIND_POLYLINEXY ) );
+
     if( aPolyline.IsNull() )
       return false;
 
-    aPolyline->SetShape( theShapes[i] );
+    aPolyline->SetShape( aShapeOut );
 
-    if( isUseIndices )
+    int anIndex = 0;
+    QString aName = K;
+    while( !theDocument->FindObjectByName( aName ).IsNull() )
     {
-      QString aNewName = theNamePrefix + "_" + QString::number( anIndex );
-      if( theDoc->FindObjectByName( aNewName ).IsNull() )  // the object with such a name is not found
-        aPolyline->SetName( aNewName );
       anIndex++;
+      aName = K + "_" + QString::number( anIndex );
     }
-    else
-    {
-      aPolyline->SetName( theNamePrefix );
-    }
+    aPolyline->SetName( aName );
   }
+
   return true;
 }