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     // processing each face
 195     TopExp_Explorer exp;
 196     //for( exp.Init(Shape, TopAbs_FACE); exp.More(); exp.Next()) {
 197     for( exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 198       TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 199
 200       if(aProcessed.Contains(aFace))
 201         continue;
 202
 203       Standard_Integer dummy;
 204       TopTools_SequenceOfShape edges;
 205       AddOrdinaryEdges(edges,aFace,dummy);
 206
 207       TopTools_SequenceOfShape faces;
 208       faces.Append(aFace);
 209
 210       //surface and location to construct result
 211       TopLoc_Location aBaseLocation;
 212       Handle(Geom_Surface) aBaseSurface = BRep_Tool::Surface(aFace,aBaseLocation);
 213       aBaseSurface = ClearRts(aBaseSurface);
 214
 215       // find adjacent faces to union
 216       Standard_Integer i;
 217       for( i = 1; i <= edges.Length(); i++) {
 218         TopoDS_Edge edge = TopoDS::Edge(edges(i));
 219         if(BRep_Tool::Degenerated(edge))
 220           continue;
 221
 222         const TopTools_ListOfShape& aList = aMapEdgeFaces.FindFromKey(edge);
 223         TopTools_ListIteratorOfListOfShape anIter(aList);
 224         for( ; anIter.More(); anIter.Next()) {
 225           TopoDS_Face anCheckedFace = TopoDS::Face(anIter.Value().Oriented(TopAbs_FORWARD));
 226           if(anCheckedFace.IsSame(aFace))
 227             continue;
 228
 229           if(aProcessed.Contains(anCheckedFace))
 230             continue;
 231
 232           if(IsSameDomain(aFace,anCheckedFace)) {
 233
 234             if(aList.Extent() != 2) {
 235               // non mainfold case is not processed
 236               continue;
 237             }
 238
 239             // replacing pcurves
 240             TopoDS_Face aMockUpFace;
 241             BRep_Builder B;
 242             B.MakeFace(aMockUpFace,aBaseSurface,aBaseLocation,0.);
 243             MovePCurves(aMockUpFace,anCheckedFace);
 244
 245             if(AddOrdinaryEdges(edges,aMockUpFace,dummy)) {
 246               // sequence edges is modified
 247               i = dummy;
 248             }
 249
 250             faces.Append(anCheckedFace);
 251             aProcessed.Add(anCheckedFace);
 252             break;
 253           }
 254         }
 255       }
 256
 257       // all faces collected in the sequence. Perform union of faces
 258       if(faces.Length() > 1) {
 259         NbModif++;
 260         TopoDS_Face aResult;
 261         BRep_Builder B;
 262         B.MakeFace(aResult,aBaseSurface,aBaseLocation,0);
 263         Standard_Integer nbWires = 0;
 264
 265         // connecting wires
 266         while(edges.Length()>0) {
 267
 268           Standard_Boolean isEdge3d = Standard_False;
 269           nbWires++;
 270           TopTools_MapOfShape aVertices;
 271           TopoDS_Wire aWire;
 272           B.MakeWire(aWire);
 273
 274           TopoDS_Edge anEdge = TopoDS::Edge(edges(1));
 275           edges.Remove(1);
 276
 277           isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 278           B.Add(aWire,anEdge);
 279           TopoDS_Vertex V1,V2;
 280           TopExp::Vertices(anEdge,V1,V2);
 281           aVertices.Add(V1);
 282           aVertices.Add(V2);
 283
 284           Standard_Boolean isNewFound = Standard_False;
 285           do {
 286             isNewFound = Standard_False;
 287             for(Standard_Integer j = 1; j <= edges.Length(); j++) {
 288               anEdge = TopoDS::Edge(edges(j));
 289               TopExp::Vertices(anEdge,V1,V2);
 290               if(aVertices.Contains(V1) || aVertices.Contains(V2)) {
 291                 isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 292                 aVertices.Add(V1);
 293                 aVertices.Add(V2);
 294                 B.Add(aWire,anEdge);
 295                 edges.Remove(j);
 296                 j--;
 297                 isNewFound = Standard_True;
 298               }
 299             }
 300           } while (isNewFound);
 301
 302           // sorting any type of edges
 303           aWire = TopoDS::Wire(aContext->Apply(aWire));
 304
 305           TopoDS_Face tmpF = TopoDS::Face(aContext->Apply(faces(1).Oriented(TopAbs_FORWARD)));
 306           Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(aWire,tmpF,Precision::Confusion());
 307           sfw->FixReorder();
 308           Standard_Boolean isDegRemoved = Standard_False;
 309           if(!sfw->StatusReorder ( ShapeExtend_FAIL )) {
 310             // clear degenerated edges if at least one with 3d curve exist
 311             if(isEdge3d) {
 312               Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 313               for(Standard_Integer j = 1; j<=sewd->NbEdges();j++) {
 314                 TopoDS_Edge E = sewd->Edge(j);
 315                 if(BRep_Tool::Degenerated(E)) {
 316                   sewd->Remove(j);
 317                   isDegRemoved = Standard_True;
 318                   j--;
 319                 }
 320               }
 321             }
 322             sfw->FixShifted();
 323             if(isDegRemoved)
 324               sfw->FixDegenerated();
 325           }
 326           TopoDS_Wire aWireFixed = sfw->Wire();
 327           aContext->Replace(aWire,aWireFixed);
 328           // add resulting wire
 329           if(isEdge3d) {
 330             B.Add(aResult,aWireFixed);
 331           }
 332           else  {
 333             // sorting edges
 334             Handle(ShapeExtend_WireData) sbwd = sfw->WireData();
 335             Standard_Integer nbEdges = sbwd->NbEdges();
 336             // sort degenerated edges and create one edge instead of several ones
 337             ShapeAnalysis_WireOrder sawo(Standard_False, 0);
 338             ShapeAnalysis_Edge sae;
 339             Standard_Integer aLastEdge = nbEdges;
 340             for(Standard_Integer j = 1; j <= nbEdges; j++) {
 341               Standard_Real f,l;
 342               //smh protection on NULL pcurve
 343               Handle(Geom2d_Curve) c2d;
 344               if(!sae.PCurve(sbwd->Edge(j),tmpF,c2d,f,l)) {
 345                 aLastEdge--;
 346                 continue;
 347               }
 348               sawo.Add(c2d->Value(f).XY(),c2d->Value(l).XY());
 349             }
 350             sawo.Perform();
 351
 352             // constructind one degenerative edge
 353             gp_XY aStart, anEnd, tmp;
 354             Standard_Integer nbFirst = sawo.Ordered(1);
 355             TopoDS_Edge anOrigE = TopoDS::Edge(sbwd->Edge(nbFirst).Oriented(TopAbs_FORWARD));
 356             ShapeBuild_Edge sbe;
 357             TopoDS_Vertex aDummyV;
 358             TopoDS_Edge E = sbe.CopyReplaceVertices(anOrigE,aDummyV,aDummyV);
 359             sawo.XY(nbFirst,aStart,tmp);
 360             sawo.XY(sawo.Ordered(aLastEdge),tmp,anEnd);
 361
 362             gp_XY aVec = anEnd-aStart;
 363             Handle(Geom2d_Line) aLine = new Geom2d_Line(aStart,gp_Dir2d(anEnd-aStart));
 364
 365             B.UpdateEdge(E,aLine,tmpF,0.);
 366             B.Range(E,tmpF,0.,aVec.Modulus());
 367             Handle(Geom_Curve) C3d;
 368             B.UpdateEdge(E,C3d,0.);
 369             B.Degenerated(E,Standard_True);
 370             TopoDS_Wire aW;
 371             B.MakeWire(aW);
 372             B.Add(aW,E);
 373             B.Add(aResult,aW);
 374           }
 375
 376         }
 377
 378         // perform substitution of face
 379         aContext->Replace(aContext->Apply(aFace),aResult);
 380
 381
 382         ShapeFix_Face sff (aResult);
 383         //Intializing by tolerances
 384         sff.SetPrecision(myTolerance);
 385         sff.SetMinTolerance(tol);
 386         sff.SetMaxTolerance(Max(1.,myTolerance*1000.));
 387         //Setting modes
 388         sff.FixOrientationMode() = 0;
 389         //sff.FixWireMode() = 0;
 390         sff.SetContext(aContext);
 391         // Applying the fixes
 392         sff.Perform();
 393         if(sff.Status(ShapeExtend_FAIL))
 394         hasFailed = Standard_True;
 395
 396         // breaking down to several faces
 397         TopoDS_Shape theResult = aContext->Apply(aResult);
 398         for(TopExp_Explorer aFaceExp(theResult,TopAbs_FACE);aFaceExp.More();aFaceExp.Next()) {
 399           TopoDS_Face aCurrent = TopoDS::Face(aFaceExp.Current().Oriented(TopAbs_FORWARD));
 400           Handle(TColGeom_HArray2OfSurface) grid = new TColGeom_HArray2OfSurface ( 1, 1, 1, 1 );
 401           grid->SetValue ( 1, 1, aBaseSurface );
 402           Handle(ShapeExtend_CompositeSurface) G = new ShapeExtend_CompositeSurface ( grid );
 403           ShapeFix_ComposeShell CompShell;
 404           CompShell.Init ( G, aBaseLocation, aCurrent, ::Precision::Confusion() );//myPrecision
 405           CompShell.SetContext( aContext );
 406
 407           TopTools_SequenceOfShape parts;
 408           ShapeFix_SequenceOfWireSegment wires;
 409           for(TopExp_Explorer W_Exp(aCurrent,TopAbs_WIRE);W_Exp.More();W_Exp.Next()) {
 410             Handle(ShapeExtend_WireData) sbwd =
 411               new ShapeExtend_WireData ( TopoDS::Wire(W_Exp.Current() ));
 412             ShapeFix_WireSegment seg ( sbwd, TopAbs_REVERSED );
 413             wires.Append(seg);
 414           }
 415
 416           CompShell.DispatchWires ( parts,wires );
 417           for (Standard_Integer j=1; j <= parts.Length(); j++ ) {
 418             ShapeFix_Face aFixOrient(TopoDS::Face(parts(j)));
 419             aFixOrient.SetContext(aContext);
 420             aFixOrient.FixOrientation();
 421           }
 422
 423           TopoDS_Shape CompRes;
 424           if ( faces.Length() !=1 ) {
 425             TopoDS_Shell S;
 426             B.MakeShell ( S );
 427             for ( i=1; i <= parts.Length(); i++ )
 428               B.Add ( S, parts(i) );
 429             CompRes = S;
 430           }
 431           else CompRes = parts(1);
 432
 433           aContext->Replace(aCurrent,CompRes);
 434         }
 435
 436         // remove the remaining faces
 437         for(i = 2; i <= faces.Length(); i++)
 438           aContext->Remove(faces(i));
 439       }
 440     }
 441
 442     //TopoDS_Shape aResult = Shape;
 443     if(NbModif>0) {
 444       TopoDS_Shape aResult = aSolid;
 445       if(!hasFailed) {
 446         aResult = aContext->Apply(aSolid);
 447
 448         ShapeFix_Edge sfe;
 449         for(exp.Init(aResult,TopAbs_EDGE); exp.More(); exp.Next()) {
 450           TopoDS_Edge E = TopoDS::Edge(exp.Current());
 451           sfe.FixVertexTolerance (E);
 452           // ptv add fix same parameter
 453           sfe.FixSameParameter(E, myTolerance);
 454         }
 455
 456         myContext->Replace(aSolid,aResult);
 457       }
 458     }
 459 //    else {
 460       for( exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 461         TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 462         Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire;
 463         sfw->SetContext(myContext);
 464         sfw->SetPrecision(myTolerance);
 465         sfw->SetMinTolerance(myTolerance);
 466         sfw->SetMaxTolerance(Max(1.,myTolerance*1000.));
 467         sfw->SetFace(aFace);
 468         for ( TopoDS_Iterator iter(aFace,Standard_False); iter.More(); iter.Next()) {
 469           TopoDS_Wire wire = TopoDS::Wire ( iter.Value() );
 470           sfw->Load(wire);
 471           sfw->FixReorder();
 472           sfw->FixShifted();
 473         }
 474       }
 475 //    }
 476
 477   } // end processing each solid
 478
 479   aResShape = myContext->Apply(Shape);
 480   return aResShape;
 481 }
 482
 483
 484 //=======================================================================
 485 //function : IsSameDomain
 486 //purpose  :
 487 //=======================================================================
 488
 489 Standard_Boolean BlockFix_UnionFaces::IsSameDomain(const TopoDS_Face& aFace,
 490                                                    const TopoDS_Face& aCheckedFace) const
 491 {
 492   //checking the same handless
 493   TopLoc_Location L1, L2;
 494   Handle(Geom_Surface) S1, S2;
 495
 496   S1 = BRep_Tool::Surface(aFace,L1);
 497   S2 = BRep_Tool::Surface(aCheckedFace,L2);
 498
 499   if (S1 == S2 && L1 == L2)
 500     return true;
 501
 502   // begin: planar case (improvement 20052)
 503   S1 = BRep_Tool::Surface(aFace);
 504   S2 = BRep_Tool::Surface(aCheckedFace);
 505
 506   Handle(Geom_Plane) aGP1, aGP2;
 507   Handle(Geom_RectangularTrimmedSurface) aGRTS1, aGRTS2;
 508   Handle(Geom_OffsetSurface) aGOFS1, aGOFS2;
 509
 510   aGRTS1 = Handle(Geom_RectangularTrimmedSurface)::DownCast(S1);
 511   aGRTS2 = Handle(Geom_RectangularTrimmedSurface)::DownCast(S2);
 512
 513   aGOFS1 = Handle(Geom_OffsetSurface)::DownCast(S1);
 514   aGOFS2 = Handle(Geom_OffsetSurface)::DownCast(S2);
 515
 516   if (!aGOFS1.IsNull()) {
 517     aGP1 = Handle(Geom_Plane)::DownCast(aGOFS1->BasisSurface());
 518   }
 519   else if (!aGRTS1.IsNull()) {
 520     aGP1 = Handle(Geom_Plane)::DownCast(aGRTS1->BasisSurface());
 521   }
 522   else {
 523     aGP1 = Handle(Geom_Plane)::DownCast(S1);
 524   }
 525
 526   if (!aGOFS2.IsNull()) {
 527     aGP2 = Handle(Geom_Plane)::DownCast(aGOFS2->BasisSurface());
 528   }
 529   else if (!aGRTS2.IsNull()) {
 530     aGP2 = Handle(Geom_Plane)::DownCast(aGRTS2->BasisSurface());
 531   }
 532   else {
 533     aGP2 = Handle(Geom_Plane)::DownCast(S2);
 534   }
 535
 536   if (!aGP1.IsNull() && !aGP2.IsNull()) {
 537     // both surfaces are planar, check equality
 538     Standard_Real A1, B1, C1, D1;
 539     Standard_Real A2, B2, C2, D2;
 540     aGP1->Coefficients(A1, B1, C1, D1);
 541     aGP2->Coefficients(A2, B2, C2, D2);
 542
 543     if (fabs(A1) > Precision::Confusion()) {
 544       A1 = 1.0;
 545       B1 /= A1;
 546       C1 /= A1;
 547       D1 /= A1;
 548     }
 549     else if (fabs(B1) > Precision::Confusion()) {
 550       B1 = 1.0;
 551       C1 /= B1;
 552       D1 /= B1;
 553     }
 554     else {
 555       C1 = 1.0;
 556       D1 /= C1;
 557     }
 558
 559     if (fabs(A2) > Precision::Confusion()) {
 560       A2 = 1.0;
 561       B2 /= A2;
 562       C2 /= A2;
 563       D2 /= A2;
 564     }
 565     else if (fabs(B2) > Precision::Confusion()) {
 566       B2 = 1.0;
 567       C2 /= B2;
 568       D2 /= B2;
 569     }
 570     else {
 571       C2 = 1.0;
 572       D2 /= C2;
 573     }
 574
 575     if (fabs(A1 - A2) < Precision::Confusion() &&
 576         fabs(B1 - B2) < Precision::Confusion() &&
 577         fabs(C1 - C2) < Precision::Confusion() &&
 578         fabs(D1 - D2) < Precision::Confusion())
 579       return true;
 580   }
 581   // end: planar case (improvement 20052)
 582
 583   return false;
 584 }
 585
 586
 587 //=======================================================================
 588 //function : MovePCurves
 589 //purpose  :
 590 //=======================================================================
 591
 592 void BlockFix_UnionFaces::MovePCurves(TopoDS_Face& aTarget,
 593                                       const TopoDS_Face& aSource) const
 594 {
 595   BRep_Builder B;
 596   for(TopExp_Explorer wexp(aSource,TopAbs_WIRE);wexp.More();wexp.Next()) {
 597     Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(TopoDS::Wire(wexp.Current()),
 598                                                   aTarget, Precision::Confusion());
 599     sfw->FixReorder();
 600     Standard_Boolean isReoredFailed = sfw->StatusReorder ( ShapeExtend_FAIL );
 601     sfw->FixEdgeCurves();
 602     if(isReoredFailed)
 603       continue;
 604
 605     sfw->FixShifted();
 606     sfw->FixDegenerated();
 607
 608     // remove degenerated edges from not degenerated points
 609     ShapeAnalysis_Edge sae;
 610     Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 611     for(Standard_Integer i = 1; i<=sewd->NbEdges();i++) {
 612       TopoDS_Edge E = sewd->Edge(i);
 613       if(BRep_Tool::Degenerated(E)&&!sae.HasPCurve(E,aTarget)) {
 614         sewd->Remove(i);
 615         i--;
 616       }
 617     }
 618
 619     TopoDS_Wire ResWire = sfw->Wire();
 620     B.Add(aTarget,ResWire);
 621   }
 622 }