src/GEOMAlgo/BlockFix_UnionFaces.cxx

   1 //  Copyright (C) 2007-2008  CEA/DEN, EDF R&D, OPEN CASCADE
   2 //
   3 //  Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
   4 //  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
   5 //
   6 //  This library is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU Lesser General Public
   8 //  License as published by the Free Software Foundation; either
   9 //  version 2.1 of the License.
  10 //
  11 //  This library is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 //  Lesser General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU Lesser General Public
  17 //  License along with this library; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 //
  20 //  See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  21 //
  22 // File:        BlockFix_UnionFaces.cxx
  23 // Created:     Tue Dec  7 17:15:42 2004
  24 // Author:      Pavel DURANDIN
  25 //
  26
  27 #include <BlockFix_UnionFaces.ixx>
  28
  29 #include <ShapeAnalysis_WireOrder.hxx>
  30 #include <ShapeAnalysis_Edge.hxx>
  31
  32 #include <ShapeBuild_Edge.hxx>
  33 #include <ShapeBuild_ReShape.hxx>
  34
  35 #include <ShapeExtend_WireData.hxx>
  36 #include <ShapeExtend_CompositeSurface.hxx>
  37
  38 #include <ShapeFix_Face.hxx>
  39 #include <ShapeFix_ComposeShell.hxx>
  40 #include <ShapeFix_SequenceOfWireSegment.hxx>
  41 #include <ShapeFix_WireSegment.hxx>
  42 #include <ShapeFix_Wire.hxx>
  43 #include <ShapeFix_Edge.hxx>
  44
  45 #include <BRep_Tool.hxx>
  46 #include <BRep_Builder.hxx>
  47 #include <BRepTools.hxx>
  48
  49 #include <TopExp.hxx>
  50 #include <TopExp_Explorer.hxx>
  51
  52 #include <TopTools_SequenceOfShape.hxx>
  53 #include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
  54 #include <TopTools_ListOfShape.hxx>
  55 #include <TopTools_ListIteratorOfListOfShape.hxx>
  56 #include <TopTools_MapOfShape.hxx>
  57 #include <TopTools_MapIteratorOfMapOfShape.hxx>
  58
  59 #include <TopoDS.hxx>
  60 #include <TopoDS_Edge.hxx>
  61 #include <TopoDS_Wire.hxx>
  62 #include <TopoDS_Face.hxx>
  63 #include <TopoDS_Solid.hxx>
  64 #include <TopoDS_Vertex.hxx>
  65 #include <TopoDS_Shell.hxx>
  66 #include <TopoDS_Iterator.hxx>
  67
  68 #include <TColGeom_HArray2OfSurface.hxx>
  69
  70 #include <Geom_Plane.hxx>
  71 #include <Geom_OffsetSurface.hxx>
  72 #include <Geom_CylindricalSurface.hxx>
  73 #include <Geom_SphericalSurface.hxx>
  74 #include <Geom_Surface.hxx>
  75 #include <Geom_Curve.hxx>
  76 #include <Geom_RectangularTrimmedSurface.hxx>
  77
  78 #include <Geom2d_Line.hxx>
  79
  80 #include <gp_XY.hxx>
  81 #include <gp_Pnt2d.hxx>
  82
  83 //=======================================================================
  84 //function : BlockFix_UnionFaces
  85 //purpose  :
  86 //=======================================================================
  87
  88 BlockFix_UnionFaces::BlockFix_UnionFaces()
  89      : myTolerance(Precision::Confusion())
  90 {
  91 }
  92
  93
  94 //=======================================================================
  95 //function : GetTolearnce
  96 //purpose  :
  97 //=======================================================================
  98
  99 Standard_Real& BlockFix_UnionFaces::GetTolerance()
 100 {
 101   return myTolerance;
 102 }
 103
 104
 105 //=======================================================================
 106 //function : AddOrdinaryEdges
 107 //purpose  : auxilary
 108 //=======================================================================
 109 // adds edges from the shape to the sequence
 110 // seams and equal edges are dropped
 111 // Returns true if one of original edges dropped
 112 static Standard_Boolean AddOrdinaryEdges(TopTools_SequenceOfShape& edges,
 113                                          const TopoDS_Shape aShape,
 114                                          Standard_Integer& anIndex)
 115 {
 116   //map of edges
 117   TopTools_MapOfShape aNewEdges;
 118   //add edges without seams
 119   for(TopExp_Explorer exp(aShape,TopAbs_EDGE); exp.More(); exp.Next()) {
 120     TopoDS_Shape edge = exp.Current();
 121     if(aNewEdges.Contains(edge))
 122       aNewEdges.Remove(edge);
 123     else
 124       aNewEdges.Add(edge);
 125   }
 126
 127   Standard_Boolean isDropped = Standard_False;
 128   //merge edges and drop seams
 129   for(Standard_Integer i = 1; i <= edges.Length(); i++) {
 130     TopoDS_Shape current = edges(i);
 131     if(aNewEdges.Contains(current)) {
 132
 133       aNewEdges.Remove(current);
 134       edges.Remove(i);
 135       i--;
 136
 137       if(!isDropped) {
 138         isDropped = Standard_True;
 139         anIndex = i;
 140       }
 141     }
 142   }
 143
 144   //add edges to the sequemce
 145   for(TopTools_MapIteratorOfMapOfShape anIter(aNewEdges); anIter.More(); anIter.Next())
 146     edges.Append(anIter.Key());
 147
 148   return isDropped;
 149 }
 150
 151
 152 //=======================================================================
 153 //function : ClearRts
 154 //purpose  : auxilary
 155 //=======================================================================
 156 static Handle(Geom_Surface) ClearRts(const Handle(Geom_Surface)& aSurface)
 157 {
 158   if(aSurface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
 159     Handle(Geom_RectangularTrimmedSurface) rts =
 160       Handle(Geom_RectangularTrimmedSurface)::DownCast(aSurface);
 161     return rts->BasisSurface();
 162   }
 163   return aSurface;
 164 }
 165
 166
 167 //=======================================================================
 168 //function : Perform
 169 //purpose  :
 170 //=======================================================================
 171
 172 TopoDS_Shape BlockFix_UnionFaces::Perform(const TopoDS_Shape& Shape)
 173 {
 174   Handle(ShapeBuild_ReShape) myContext = new ShapeBuild_ReShape;
 175   TopoDS_Shape aResShape = myContext->Apply(Shape);
 176
 177   // processing each solid
 178   TopExp_Explorer exps;
 179   for (exps.Init(Shape, TopAbs_SOLID); exps.More(); exps.Next()) {
 180     TopoDS_Solid aSolid = TopoDS::Solid(exps.Current());
 181
 182     // creating map of edge faces
 183     TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces;
 184     TopExp::MapShapesAndAncestors(aSolid, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces);
 185
 186     // map of processed shapes
 187     TopTools_MapOfShape aProcessed;
 188
 189     Handle(ShapeBuild_ReShape) aContext = new ShapeBuild_ReShape;
 190
 191     Standard_Integer NbModif = 0;
 192     Standard_Boolean hasFailed = Standard_False;
 193     Standard_Real tol = Min(Max(Precision::Confusion(), myTolerance/10.), 0.1);
 194
 195     // count faces
 196     int nbf = 0;
 197     TopExp_Explorer exp;
 198     TopTools_MapOfShape mapF;
 199     for (exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 200       if (mapF.Add(exp.Current()))
 201         nbf++;
 202     }
 203
 204     // processing each face
 205     mapF.Clear();
 206     for (exp.Init(aSolid, TopAbs_FACE); exp.More() && nbf > 6; exp.Next()) {
 207       TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 208
 209       if (aProcessed.Contains(aFace))
 210         continue;
 211
 212       Standard_Integer dummy;
 213       TopTools_SequenceOfShape edges;
 214       AddOrdinaryEdges(edges,aFace,dummy);
 215
 216       TopTools_SequenceOfShape faces;
 217       faces.Append(aFace);
 218
 219       //surface and location to construct result
 220       TopLoc_Location aBaseLocation;
 221       Handle(Geom_Surface) aBaseSurface = BRep_Tool::Surface(aFace,aBaseLocation);
 222       aBaseSurface = ClearRts(aBaseSurface);
 223
 224       // find adjacent faces to union
 225       Standard_Integer i;
 226       for (i = 1; i <= edges.Length(); i++) {
 227         TopoDS_Edge edge = TopoDS::Edge(edges(i));
 228         if (BRep_Tool::Degenerated(edge))
 229           continue;
 230
 231         const TopTools_ListOfShape& aList = aMapEdgeFaces.FindFromKey(edge);
 232         TopTools_ListIteratorOfListOfShape anIter(aList);
 233         for (; anIter.More(); anIter.Next()) {
 234           TopoDS_Face anCheckedFace = TopoDS::Face(anIter.Value().Oriented(TopAbs_FORWARD));
 235           if (anCheckedFace.IsSame(aFace))
 236             continue;
 237
 238           if (aProcessed.Contains(anCheckedFace))
 239             continue;
 240
 241           if (IsSameDomain(aFace,anCheckedFace)) {
 242
 243             if (aList.Extent() != 2) {
 244               // non mainfold case is not processed
 245               continue;
 246             }
 247
 248             // replacing pcurves
 249             TopoDS_Face aMockUpFace;
 250             BRep_Builder B;
 251             B.MakeFace(aMockUpFace,aBaseSurface,aBaseLocation,0.);
 252             MovePCurves(aMockUpFace,anCheckedFace);
 253
 254             if (AddOrdinaryEdges(edges,aMockUpFace,dummy)) {
 255               // sequence edges is modified
 256               i = dummy;
 257             }
 258
 259             faces.Append(anCheckedFace);
 260             aProcessed.Add(anCheckedFace);
 261             break;
 262           }
 263         }
 264       }
 265
 266       // all faces collected in the sequence. Perform union of faces
 267       if (faces.Length() > 1) {
 268         NbModif++;
 269         TopoDS_Face aResult;
 270         BRep_Builder B;
 271         B.MakeFace(aResult,aBaseSurface,aBaseLocation,0);
 272         Standard_Integer nbWires = 0;
 273
 274         // connecting wires
 275         while (edges.Length()>0) {
 276
 277           Standard_Boolean isEdge3d = Standard_False;
 278           nbWires++;
 279           TopTools_MapOfShape aVertices;
 280           TopoDS_Wire aWire;
 281           B.MakeWire(aWire);
 282
 283           TopoDS_Edge anEdge = TopoDS::Edge(edges(1));
 284           edges.Remove(1);
 285
 286           isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 287           B.Add(aWire,anEdge);
 288           TopoDS_Vertex V1,V2;
 289           TopExp::Vertices(anEdge,V1,V2);
 290           aVertices.Add(V1);
 291           aVertices.Add(V2);
 292
 293           Standard_Boolean isNewFound = Standard_False;
 294           do {
 295             isNewFound = Standard_False;
 296             for(Standard_Integer j = 1; j <= edges.Length(); j++) {
 297               anEdge = TopoDS::Edge(edges(j));
 298               TopExp::Vertices(anEdge,V1,V2);
 299               if(aVertices.Contains(V1) || aVertices.Contains(V2)) {
 300                 isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 301                 aVertices.Add(V1);
 302                 aVertices.Add(V2);
 303                 B.Add(aWire,anEdge);
 304                 edges.Remove(j);
 305                 j--;
 306                 isNewFound = Standard_True;
 307               }
 308             }
 309           } while (isNewFound);
 310
 311           // sorting any type of edges
 312           aWire = TopoDS::Wire(aContext->Apply(aWire));
 313
 314           TopoDS_Face tmpF = TopoDS::Face(aContext->Apply(faces(1).Oriented(TopAbs_FORWARD)));
 315           Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(aWire,tmpF,Precision::Confusion());
 316           sfw->FixReorder();
 317           Standard_Boolean isDegRemoved = Standard_False;
 318           if(!sfw->StatusReorder ( ShapeExtend_FAIL )) {
 319             // clear degenerated edges if at least one with 3d curve exist
 320             if(isEdge3d) {
 321               Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 322               for(Standard_Integer j = 1; j<=sewd->NbEdges();j++) {
 323                 TopoDS_Edge E = sewd->Edge(j);
 324                 if(BRep_Tool::Degenerated(E)) {
 325                   sewd->Remove(j);
 326                   isDegRemoved = Standard_True;
 327                   j--;
 328                 }
 329               }
 330             }
 331             sfw->FixShifted();
 332             if(isDegRemoved)
 333               sfw->FixDegenerated();
 334           }
 335           TopoDS_Wire aWireFixed = sfw->Wire();
 336           aContext->Replace(aWire,aWireFixed);
 337           // add resulting wire
 338           if(isEdge3d) {
 339             B.Add(aResult,aWireFixed);
 340           }
 341           else  {
 342             // sorting edges
 343             Handle(ShapeExtend_WireData) sbwd = sfw->WireData();
 344             Standard_Integer nbEdges = sbwd->NbEdges();
 345             // sort degenerated edges and create one edge instead of several ones
 346             ShapeAnalysis_WireOrder sawo(Standard_False, 0);
 347             ShapeAnalysis_Edge sae;
 348             Standard_Integer aLastEdge = nbEdges;
 349             for(Standard_Integer j = 1; j <= nbEdges; j++) {
 350               Standard_Real f,l;
 351               //smh protection on NULL pcurve
 352               Handle(Geom2d_Curve) c2d;
 353               if(!sae.PCurve(sbwd->Edge(j),tmpF,c2d,f,l)) {
 354                 aLastEdge--;
 355                 continue;
 356               }
 357               sawo.Add(c2d->Value(f).XY(),c2d->Value(l).XY());
 358             }
 359             sawo.Perform();
 360
 361             // constructind one degenerative edge
 362             gp_XY aStart, anEnd, tmp;
 363             Standard_Integer nbFirst = sawo.Ordered(1);
 364             TopoDS_Edge anOrigE = TopoDS::Edge(sbwd->Edge(nbFirst).Oriented(TopAbs_FORWARD));
 365             ShapeBuild_Edge sbe;
 366             TopoDS_Vertex aDummyV;
 367             TopoDS_Edge E = sbe.CopyReplaceVertices(anOrigE,aDummyV,aDummyV);
 368             sawo.XY(nbFirst,aStart,tmp);
 369             sawo.XY(sawo.Ordered(aLastEdge),tmp,anEnd);
 370
 371             gp_XY aVec = anEnd-aStart;
 372             Handle(Geom2d_Line) aLine = new Geom2d_Line(aStart,gp_Dir2d(anEnd-aStart));
 373
 374             B.UpdateEdge(E,aLine,tmpF,0.);
 375             B.Range(E,tmpF,0.,aVec.Modulus());
 376             Handle(Geom_Curve) C3d;
 377             B.UpdateEdge(E,C3d,0.);
 378             B.Degenerated(E,Standard_True);
 379             TopoDS_Wire aW;
 380             B.MakeWire(aW);
 381             B.Add(aW,E);
 382             B.Add(aResult,aW);
 383           }
 384         }
 385
 386         // perform substitution of face
 387         aContext->Replace(aContext->Apply(aFace),aResult);
 388
 389         ShapeFix_Face sff (aResult);
 390         //Intializing by tolerances
 391         sff.SetPrecision(myTolerance);
 392         sff.SetMinTolerance(tol);
 393         sff.SetMaxTolerance(Max(1.,myTolerance*1000.));
 394         //Setting modes
 395         sff.FixOrientationMode() = 0;
 396         //sff.FixWireMode() = 0;
 397         sff.SetContext(aContext);
 398         // Applying the fixes
 399         sff.Perform();
 400         if(sff.Status(ShapeExtend_FAIL))
 401         hasFailed = Standard_True;
 402
 403         // breaking down to several faces
 404         TopoDS_Shape theResult = aContext->Apply(aResult);
 405         for (TopExp_Explorer aFaceExp (theResult,TopAbs_FACE); aFaceExp.More(); aFaceExp.Next()) {
 406           TopoDS_Face aCurrent = TopoDS::Face(aFaceExp.Current().Oriented(TopAbs_FORWARD));
 407           Handle(TColGeom_HArray2OfSurface) grid = new TColGeom_HArray2OfSurface ( 1, 1, 1, 1 );
 408           grid->SetValue ( 1, 1, aBaseSurface );
 409           Handle(ShapeExtend_CompositeSurface) G = new ShapeExtend_CompositeSurface ( grid );
 410           ShapeFix_ComposeShell CompShell;
 411           CompShell.Init ( G, aBaseLocation, aCurrent, ::Precision::Confusion() );//myPrecision
 412           CompShell.SetContext( aContext );
 413
 414           TopTools_SequenceOfShape parts;
 415           ShapeFix_SequenceOfWireSegment wires;
 416           for(TopExp_Explorer W_Exp(aCurrent,TopAbs_WIRE);W_Exp.More();W_Exp.Next()) {
 417             Handle(ShapeExtend_WireData) sbwd =
 418               new ShapeExtend_WireData ( TopoDS::Wire(W_Exp.Current() ));
 419             ShapeFix_WireSegment seg ( sbwd, TopAbs_REVERSED );
 420             wires.Append(seg);
 421           }
 422
 423           CompShell.DispatchWires ( parts,wires );
 424           for (Standard_Integer j=1; j <= parts.Length(); j++ ) {
 425             ShapeFix_Face aFixOrient(TopoDS::Face(parts(j)));
 426             aFixOrient.SetContext(aContext);
 427             aFixOrient.FixOrientation();
 428           }
 429
 430           TopoDS_Shape CompRes;
 431           if ( faces.Length() !=1 ) {
 432             TopoDS_Shell S;
 433             B.MakeShell ( S );
 434             for ( i=1; i <= parts.Length(); i++ )
 435               B.Add ( S, parts(i) );
 436             CompRes = S;
 437           }
 438           else CompRes = parts(1);
 439
 440           aContext->Replace(aCurrent,CompRes);
 441         }
 442
 443         // remove the remaining faces
 444         for(i = 2; i <= faces.Length(); i++)
 445           aContext->Remove(faces(i));
 446       }
 447     } // end processing each face
 448
 449     //TopoDS_Shape aResult = Shape;
 450     if (NbModif > 0 && !hasFailed) {
 451       TopoDS_Shape aResult = aContext->Apply(aSolid);
 452
 453       ShapeFix_Edge sfe;
 454       for (exp.Init(aResult,TopAbs_EDGE); exp.More(); exp.Next()) {
 455         TopoDS_Edge E = TopoDS::Edge(exp.Current());
 456         sfe.FixVertexTolerance (E);
 457         // ptv add fix same parameter
 458         sfe.FixSameParameter(E, myTolerance);
 459       }
 460
 461       myContext->Replace(aSolid, aResult);
 462     }
 463     //else
 464     {
 465       for (exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 466         TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 467         Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire;
 468         sfw->SetContext(myContext);
 469         sfw->SetPrecision(myTolerance);
 470         sfw->SetMinTolerance(myTolerance);
 471         sfw->SetMaxTolerance(Max(1.,myTolerance*1000.));
 472         sfw->SetFace(aFace);
 473         for (TopoDS_Iterator iter (aFace,Standard_False); iter.More(); iter.Next()) {
 474           TopoDS_Wire wire = TopoDS::Wire(iter.Value());
 475           sfw->Load(wire);
 476           sfw->FixReorder();
 477           sfw->FixShifted();
 478         }
 479       }
 480     }
 481   } // end processing each solid
 482
 483   aResShape = myContext->Apply(Shape);
 484   return aResShape;
 485 }
 486
 487
 488 //=======================================================================
 489 //function : IsSameDomain
 490 //purpose  :
 491 //=======================================================================
 492
 493 Standard_Boolean BlockFix_UnionFaces::IsSameDomain(const TopoDS_Face& aFace,
 494                                                    const TopoDS_Face& aCheckedFace) const
 495 {
 496   //checking the same handless
 497   TopLoc_Location L1, L2;
 498   Handle(Geom_Surface) S1, S2;
 499
 500   S1 = BRep_Tool::Surface(aFace,L1);
 501   S2 = BRep_Tool::Surface(aCheckedFace,L2);
 502
 503   if (S1 == S2 && L1 == L2)
 504     return true;
 505
 506   // begin: planar case (improvement 20052)
 507   S1 = BRep_Tool::Surface(aFace);
 508   S2 = BRep_Tool::Surface(aCheckedFace);
 509
 510   Handle(Geom_Plane) aGP1, aGP2;
 511   Handle(Geom_RectangularTrimmedSurface) aGRTS1, aGRTS2;
 512   Handle(Geom_OffsetSurface) aGOFS1, aGOFS2;
 513
 514   aGRTS1 = Handle(Geom_RectangularTrimmedSurface)::DownCast(S1);
 515   aGRTS2 = Handle(Geom_RectangularTrimmedSurface)::DownCast(S2);
 516
 517   aGOFS1 = Handle(Geom_OffsetSurface)::DownCast(S1);
 518   aGOFS2 = Handle(Geom_OffsetSurface)::DownCast(S2);
 519
 520   if (!aGOFS1.IsNull()) {
 521     aGP1 = Handle(Geom_Plane)::DownCast(aGOFS1->BasisSurface());
 522   }
 523   else if (!aGRTS1.IsNull()) {
 524     aGP1 = Handle(Geom_Plane)::DownCast(aGRTS1->BasisSurface());
 525   }
 526   else {
 527     aGP1 = Handle(Geom_Plane)::DownCast(S1);
 528   }
 529
 530   if (!aGOFS2.IsNull()) {
 531     aGP2 = Handle(Geom_Plane)::DownCast(aGOFS2->BasisSurface());
 532   }
 533   else if (!aGRTS2.IsNull()) {
 534     aGP2 = Handle(Geom_Plane)::DownCast(aGRTS2->BasisSurface());
 535   }
 536   else {
 537     aGP2 = Handle(Geom_Plane)::DownCast(S2);
 538   }
 539
 540   if (!aGP1.IsNull() && !aGP2.IsNull()) {
 541     // both surfaces are planar, check equality
 542     Standard_Real A1, B1, C1, D1;
 543     Standard_Real A2, B2, C2, D2;
 544     aGP1->Coefficients(A1, B1, C1, D1);
 545     aGP2->Coefficients(A2, B2, C2, D2);
 546
 547     if (fabs(A1) > Precision::Confusion()) {
 548       A1 = 1.0;
 549       B1 /= A1;
 550       C1 /= A1;
 551       D1 /= A1;
 552     }
 553     else if (fabs(B1) > Precision::Confusion()) {
 554       B1 = 1.0;
 555       C1 /= B1;
 556       D1 /= B1;
 557     }
 558     else {
 559       C1 = 1.0;
 560       D1 /= C1;
 561     }
 562
 563     if (fabs(A2) > Precision::Confusion()) {
 564       A2 = 1.0;
 565       B2 /= A2;
 566       C2 /= A2;
 567       D2 /= A2;
 568     }
 569     else if (fabs(B2) > Precision::Confusion()) {
 570       B2 = 1.0;
 571       C2 /= B2;
 572       D2 /= B2;
 573     }
 574     else {
 575       C2 = 1.0;
 576       D2 /= C2;
 577     }
 578
 579     if (fabs(A1 - A2) < Precision::Confusion() &&
 580         fabs(B1 - B2) < Precision::Confusion() &&
 581         fabs(C1 - C2) < Precision::Confusion() &&
 582         fabs(D1 - D2) < Precision::Confusion())
 583       return true;
 584   }
 585   // end: planar case (improvement 20052)
 586
 587   return false;
 588 }
 589
 590
 591 //=======================================================================
 592 //function : MovePCurves
 593 //purpose  :
 594 //=======================================================================
 595
 596 void BlockFix_UnionFaces::MovePCurves(TopoDS_Face& aTarget,
 597                                       const TopoDS_Face& aSource) const
 598 {
 599   BRep_Builder B;
 600   for(TopExp_Explorer wexp(aSource,TopAbs_WIRE);wexp.More();wexp.Next()) {
 601     Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(TopoDS::Wire(wexp.Current()),
 602                                                   aTarget, Precision::Confusion());
 603     sfw->FixReorder();
 604     Standard_Boolean isReoredFailed = sfw->StatusReorder ( ShapeExtend_FAIL );
 605     sfw->FixEdgeCurves();
 606     if(isReoredFailed)
 607       continue;
 608
 609     sfw->FixShifted();
 610     sfw->FixDegenerated();
 611
 612     // remove degenerated edges from not degenerated points
 613     ShapeAnalysis_Edge sae;
 614     Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 615     for(Standard_Integer i = 1; i<=sewd->NbEdges();i++) {
 616       TopoDS_Edge E = sewd->Edge(i);
 617       if(BRep_Tool::Degenerated(E)&&!sae.HasPCurve(E,aTarget)) {
 618         sewd->Remove(i);
 619         i--;
 620       }
 621     }
 622
 623     TopoDS_Wire ResWire = sfw->Wire();
 624     B.Add(aTarget,ResWire);
 625   }
 626 }