src/GEOMAlgo_NEW/BlockFix_UnionFaces.cxx

   1 // Copyright (C) 2007-2011  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 #include <BlockFix_UnionFaces.ixx>
  27
  28 #include <Basics_OCCTVersion.hxx>
  29
  30 #include <ShapeAnalysis_WireOrder.hxx>
  31 #include <ShapeAnalysis_Edge.hxx>
  32
  33 #include <ShapeBuild_Edge.hxx>
  34 #include <ShapeBuild_ReShape.hxx>
  35
  36 #include <ShapeExtend_WireData.hxx>
  37 #include <ShapeExtend_CompositeSurface.hxx>
  38
  39 #include <ShapeFix_Face.hxx>
  40 #include <ShapeFix_ComposeShell.hxx>
  41 #include <ShapeFix_SequenceOfWireSegment.hxx>
  42 #include <ShapeFix_WireSegment.hxx>
  43 #include <ShapeFix_Wire.hxx>
  44 #include <ShapeFix_Edge.hxx>
  45
  46 #if OCC_VERSION_LARGE > 0x06040000 // Porting to OCCT6.5.1
  47 #include <IntPatch_ImpImpIntersection.hxx>
  48 #else
  49 #include <IntPatch_TheIIIntOfIntersection.hxx>
  50 #endif
  51
  52 #include <BRep_Tool.hxx>
  53 #include <BRep_Builder.hxx>
  54 #include <BRepTools.hxx>
  55 #include <BRepTopAdaptor_TopolTool.hxx>
  56
  57 #include <TopExp.hxx>
  58 #include <TopExp_Explorer.hxx>
  59
  60 #include <TopTools_SequenceOfShape.hxx>
  61 #include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
  62 #include <TopTools_ListOfShape.hxx>
  63 #include <TopTools_ListIteratorOfListOfShape.hxx>
  64 #include <TopTools_MapOfShape.hxx>
  65 #include <TopTools_MapIteratorOfMapOfShape.hxx>
  66
  67 #include <TopoDS.hxx>
  68 #include <TopoDS_Edge.hxx>
  69 #include <TopoDS_Wire.hxx>
  70 #include <TopoDS_Face.hxx>
  71 #include <TopoDS_Solid.hxx>
  72 #include <TopoDS_Vertex.hxx>
  73 #include <TopoDS_Shell.hxx>
  74 #include <TopoDS_Iterator.hxx>
  75
  76 #include <TColGeom_HArray2OfSurface.hxx>
  77
  78 #include <GeomAdaptor_HSurface.hxx>
  79 #include <GeomLib_IsPlanarSurface.hxx>
  80
  81 #include <Geom_Surface.hxx>
  82 #include <Geom_Plane.hxx>
  83 #include <Geom_OffsetSurface.hxx>
  84 #include <Geom_SphericalSurface.hxx>
  85 #include <Geom_CylindricalSurface.hxx>
  86 #include <Geom_SurfaceOfRevolution.hxx>
  87 #include <Geom_SurfaceOfLinearExtrusion.hxx>
  88 #include <Geom_RectangularTrimmedSurface.hxx>
  89
  90 #include <Geom_Curve.hxx>
  91 #include <Geom_Line.hxx>
  92 #include <Geom_Circle.hxx>
  93
  94 #include <Geom2d_Line.hxx>
  95
  96 #include <gp_XY.hxx>
  97 #include <gp_Pnt2d.hxx>
  98
  99 #include <Standard_Failure.hxx>
 100 #include <Standard_ErrorHandler.hxx> // CAREFUL ! position of this file is critic : see Lucien PIGNOLONI / OCC
 101
 102 //=======================================================================
 103 //function : BlockFix_UnionFaces
 104 //purpose  :
 105 //=======================================================================
 106
 107 BlockFix_UnionFaces::BlockFix_UnionFaces()
 108   : myTolerance(Precision::Confusion()),
 109     myOptimumNbFaces(6)
 110 {
 111 }
 112
 113
 114 //=======================================================================
 115 //function : GetTolerance
 116 //purpose  :
 117 //=======================================================================
 118
 119 Standard_Real& BlockFix_UnionFaces::GetTolerance()
 120 {
 121   return myTolerance;
 122 }
 123
 124
 125 //=======================================================================
 126 //function : GetOptimumNbFaces
 127 //purpose  :
 128 //=======================================================================
 129
 130 Standard_Integer& BlockFix_UnionFaces::GetOptimumNbFaces()
 131 {
 132   return myOptimumNbFaces;
 133 }
 134
 135
 136 //=======================================================================
 137 //function : AddOrdinaryEdges
 138 //purpose  : auxilary
 139 //=======================================================================
 140 // adds edges from the shape to the sequence
 141 // seams and equal edges are dropped
 142 // Returns true if one of original edges dropped
 143 static Standard_Boolean AddOrdinaryEdges(TopTools_SequenceOfShape& edges,
 144                                          const TopoDS_Shape aShape,
 145                                          Standard_Integer& anIndex)
 146 {
 147   //map of edges
 148   TopTools_MapOfShape aNewEdges;
 149   //add edges without seams
 150   for(TopExp_Explorer exp(aShape,TopAbs_EDGE); exp.More(); exp.Next()) {
 151     TopoDS_Shape edge = exp.Current();
 152     if(aNewEdges.Contains(edge))
 153       aNewEdges.Remove(edge);
 154     else
 155       aNewEdges.Add(edge);
 156   }
 157
 158   Standard_Boolean isDropped = Standard_False;
 159   //merge edges and drop seams
 160   for(Standard_Integer i = 1; i <= edges.Length(); i++) {
 161     TopoDS_Shape current = edges(i);
 162     if(aNewEdges.Contains(current)) {
 163
 164       aNewEdges.Remove(current);
 165       edges.Remove(i);
 166       i--;
 167
 168       if(!isDropped) {
 169         isDropped = Standard_True;
 170         anIndex = i;
 171       }
 172     }
 173   }
 174
 175   //add edges to the sequemce
 176   for(TopTools_MapIteratorOfMapOfShape anIter(aNewEdges); anIter.More(); anIter.Next())
 177     edges.Append(anIter.Key());
 178
 179   return isDropped;
 180 }
 181
 182
 183 //=======================================================================
 184 //function : ClearRts
 185 //purpose  : auxilary
 186 //=======================================================================
 187 static Handle(Geom_Surface) ClearRts(const Handle(Geom_Surface)& aSurface)
 188 {
 189   if(aSurface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
 190     Handle(Geom_RectangularTrimmedSurface) rts =
 191       Handle(Geom_RectangularTrimmedSurface)::DownCast(aSurface);
 192     return rts->BasisSurface();
 193   }
 194   return aSurface;
 195 }
 196
 197
 198 //=======================================================================
 199 //function : Perform
 200 //purpose  :
 201 //=======================================================================
 202
 203 TopoDS_Shape BlockFix_UnionFaces::Perform(const TopoDS_Shape& Shape)
 204 {
 205   Handle(ShapeBuild_ReShape) myContext = new ShapeBuild_ReShape;
 206   TopoDS_Shape aResShape = myContext->Apply(Shape);
 207
 208   // processing each solid
 209   TopExp_Explorer exps;
 210   for (exps.Init(Shape, TopAbs_SOLID); exps.More(); exps.Next()) {
 211     TopoDS_Solid aSolid = TopoDS::Solid(exps.Current());
 212
 213     // creating map of edge faces
 214     TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces;
 215     TopExp::MapShapesAndAncestors(aSolid, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces);
 216
 217     // map of processed shapes
 218     TopTools_MapOfShape aProcessed;
 219
 220     Handle(ShapeBuild_ReShape) aContext = new ShapeBuild_ReShape;
 221
 222     Standard_Integer NbModif = 0;
 223     Standard_Boolean hasFailed = Standard_False;
 224     Standard_Real tol = Min(Max(Precision::Confusion(), myTolerance/10.), 0.1);
 225
 226     // count faces
 227     int nbf = 0;
 228     TopExp_Explorer exp;
 229     TopTools_MapOfShape mapF;
 230     for (exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 231       if (mapF.Add(exp.Current()))
 232         nbf++;
 233     }
 234
 235     bool doUnion = ((myOptimumNbFaces == 0) ||
 236                     ((myOptimumNbFaces > 0) && (nbf > myOptimumNbFaces)));
 237
 238     // processing each face
 239     mapF.Clear();
 240     for (exp.Init(aSolid, TopAbs_FACE); exp.More() && doUnion; exp.Next()) {
 241       TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 242
 243       if (aProcessed.Contains(aFace))
 244         continue;
 245
 246       Standard_Integer dummy;
 247       TopTools_SequenceOfShape edges;
 248       AddOrdinaryEdges(edges,aFace,dummy);
 249
 250       TopTools_SequenceOfShape faces;
 251       faces.Append(aFace);
 252
 253       //surface and location to construct result
 254       TopLoc_Location aBaseLocation;
 255       Handle(Geom_Surface) aBaseSurface = BRep_Tool::Surface(aFace,aBaseLocation);
 256       aBaseSurface = ClearRts(aBaseSurface);
 257
 258       // find adjacent faces to union
 259       Standard_Integer i;
 260       for (i = 1; i <= edges.Length(); i++) {
 261         TopoDS_Edge edge = TopoDS::Edge(edges(i));
 262         if (BRep_Tool::Degenerated(edge))
 263           continue;
 264
 265         const TopTools_ListOfShape& aList = aMapEdgeFaces.FindFromKey(edge);
 266         TopTools_ListIteratorOfListOfShape anIter(aList);
 267         for (; anIter.More(); anIter.Next()) {
 268           TopoDS_Face anCheckedFace = TopoDS::Face(anIter.Value().Oriented(TopAbs_FORWARD));
 269           if (anCheckedFace.IsSame(aFace))
 270             continue;
 271
 272           if (aProcessed.Contains(anCheckedFace))
 273             continue;
 274
 275           if (IsSameDomain(aFace,anCheckedFace)) {
 276
 277             if (aList.Extent() != 2) {
 278               // non mainfold case is not processed
 279               continue;
 280             }
 281
 282             // replacing pcurves
 283             TopoDS_Face aMockUpFace;
 284             BRep_Builder B;
 285             B.MakeFace(aMockUpFace,aBaseSurface,aBaseLocation,0.);
 286             MovePCurves(aMockUpFace,anCheckedFace);
 287
 288             if (AddOrdinaryEdges(edges,aMockUpFace,dummy)) {
 289               // sequence edges is modified
 290               i = dummy;
 291             }
 292
 293             faces.Append(anCheckedFace);
 294             aProcessed.Add(anCheckedFace);
 295             break;
 296           }
 297         }
 298       }
 299
 300       // all faces collected in the sequence. Perform union of faces
 301       if (faces.Length() > 1) {
 302         NbModif++;
 303         TopoDS_Face aResult;
 304         BRep_Builder B;
 305         B.MakeFace(aResult,aBaseSurface,aBaseLocation,0);
 306         Standard_Integer nbWires = 0;
 307
 308         // connecting wires
 309         while (edges.Length()>0) {
 310
 311           Standard_Boolean isEdge3d = Standard_False;
 312           nbWires++;
 313           TopTools_MapOfShape aVertices;
 314           TopoDS_Wire aWire;
 315           B.MakeWire(aWire);
 316
 317           TopoDS_Edge anEdge = TopoDS::Edge(edges(1));
 318           edges.Remove(1);
 319
 320           isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 321           B.Add(aWire,anEdge);
 322           TopoDS_Vertex V1,V2;
 323           TopExp::Vertices(anEdge,V1,V2);
 324           aVertices.Add(V1);
 325           aVertices.Add(V2);
 326
 327           Standard_Boolean isNewFound = Standard_False;
 328           do {
 329             isNewFound = Standard_False;
 330             for(Standard_Integer j = 1; j <= edges.Length(); j++) {
 331               anEdge = TopoDS::Edge(edges(j));
 332               TopExp::Vertices(anEdge,V1,V2);
 333               if(aVertices.Contains(V1) || aVertices.Contains(V2)) {
 334                 isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 335                 aVertices.Add(V1);
 336                 aVertices.Add(V2);
 337                 B.Add(aWire,anEdge);
 338                 edges.Remove(j);
 339                 j--;
 340                 isNewFound = Standard_True;
 341               }
 342             }
 343           } while (isNewFound);
 344
 345           // sorting any type of edges
 346           aWire = TopoDS::Wire(aContext->Apply(aWire));
 347
 348           TopoDS_Face tmpF = TopoDS::Face(aContext->Apply(faces(1).Oriented(TopAbs_FORWARD)));
 349           Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(aWire,tmpF,Precision::Confusion());
 350           sfw->FixReorder();
 351           Standard_Boolean isDegRemoved = Standard_False;
 352           if(!sfw->StatusReorder ( ShapeExtend_FAIL )) {
 353             // clear degenerated edges if at least one with 3d curve exist
 354             if(isEdge3d) {
 355               Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 356               for(Standard_Integer j = 1; j<=sewd->NbEdges();j++) {
 357                 TopoDS_Edge E = sewd->Edge(j);
 358                 if(BRep_Tool::Degenerated(E)) {
 359                   sewd->Remove(j);
 360                   isDegRemoved = Standard_True;
 361                   j--;
 362                 }
 363               }
 364             }
 365             sfw->FixShifted();
 366             if(isDegRemoved)
 367               sfw->FixDegenerated();
 368           }
 369           TopoDS_Wire aWireFixed = sfw->Wire();
 370           aContext->Replace(aWire,aWireFixed);
 371           // add resulting wire
 372           if(isEdge3d) {
 373             B.Add(aResult,aWireFixed);
 374           }
 375           else  {
 376             // sorting edges
 377             Handle(ShapeExtend_WireData) sbwd = sfw->WireData();
 378             Standard_Integer nbEdges = sbwd->NbEdges();
 379             // sort degenerated edges and create one edge instead of several ones
 380             ShapeAnalysis_WireOrder sawo(Standard_False, 0);
 381             ShapeAnalysis_Edge sae;
 382             Standard_Integer aLastEdge = nbEdges;
 383             for(Standard_Integer j = 1; j <= nbEdges; j++) {
 384               Standard_Real f,l;
 385               //smh protection on NULL pcurve
 386               Handle(Geom2d_Curve) c2d;
 387               if(!sae.PCurve(sbwd->Edge(j),tmpF,c2d,f,l)) {
 388                 aLastEdge--;
 389                 continue;
 390               }
 391               sawo.Add(c2d->Value(f).XY(),c2d->Value(l).XY());
 392             }
 393             sawo.Perform();
 394
 395             // constructind one degenerative edge
 396             gp_XY aStart, anEnd, tmp;
 397             Standard_Integer nbFirst = sawo.Ordered(1);
 398             TopoDS_Edge anOrigE = TopoDS::Edge(sbwd->Edge(nbFirst).Oriented(TopAbs_FORWARD));
 399             ShapeBuild_Edge sbe;
 400             TopoDS_Vertex aDummyV;
 401             TopoDS_Edge E = sbe.CopyReplaceVertices(anOrigE,aDummyV,aDummyV);
 402             sawo.XY(nbFirst,aStart,tmp);
 403             sawo.XY(sawo.Ordered(aLastEdge),tmp,anEnd);
 404
 405             gp_XY aVec = anEnd-aStart;
 406             Handle(Geom2d_Line) aLine = new Geom2d_Line(aStart,gp_Dir2d(anEnd-aStart));
 407
 408             B.UpdateEdge(E,aLine,tmpF,0.);
 409             B.Range(E,tmpF,0.,aVec.Modulus());
 410             Handle(Geom_Curve) C3d;
 411             B.UpdateEdge(E,C3d,0.);
 412             B.Degenerated(E,Standard_True);
 413             TopoDS_Wire aW;
 414             B.MakeWire(aW);
 415             B.Add(aW,E);
 416             B.Add(aResult,aW);
 417           }
 418         }
 419
 420         // perform substitution of face
 421         aContext->Replace(aContext->Apply(aFace),aResult);
 422
 423         ShapeFix_Face sff (aResult);
 424         //Intializing by tolerances
 425         sff.SetPrecision(myTolerance);
 426         sff.SetMinTolerance(tol);
 427         sff.SetMaxTolerance(Max(1.,myTolerance*1000.));
 428         //Setting modes
 429         sff.FixOrientationMode() = 0;
 430         //sff.FixWireMode() = 0;
 431         sff.SetContext(aContext);
 432         // Applying the fixes
 433         sff.Perform();
 434         if(sff.Status(ShapeExtend_FAIL))
 435         hasFailed = Standard_True;
 436
 437         // breaking down to several faces
 438         TopoDS_Shape theResult = aContext->Apply(aResult);
 439         for (TopExp_Explorer aFaceExp (theResult,TopAbs_FACE); aFaceExp.More(); aFaceExp.Next()) {
 440           TopoDS_Face aCurrent = TopoDS::Face(aFaceExp.Current().Oriented(TopAbs_FORWARD));
 441           Handle(TColGeom_HArray2OfSurface) grid = new TColGeom_HArray2OfSurface ( 1, 1, 1, 1 );
 442           grid->SetValue ( 1, 1, aBaseSurface );
 443           Handle(ShapeExtend_CompositeSurface) G = new ShapeExtend_CompositeSurface ( grid );
 444           ShapeFix_ComposeShell CompShell;
 445           CompShell.Init ( G, aBaseLocation, aCurrent, ::Precision::Confusion() );//myPrecision
 446           CompShell.SetContext( aContext );
 447
 448           TopTools_SequenceOfShape parts;
 449           ShapeFix_SequenceOfWireSegment wires;
 450           for(TopExp_Explorer W_Exp(aCurrent,TopAbs_WIRE);W_Exp.More();W_Exp.Next()) {
 451             Handle(ShapeExtend_WireData) sbwd =
 452               new ShapeExtend_WireData ( TopoDS::Wire(W_Exp.Current() ));
 453             ShapeFix_WireSegment seg ( sbwd, TopAbs_REVERSED );
 454             wires.Append(seg);
 455           }
 456
 457           CompShell.DispatchWires ( parts,wires );
 458           for (Standard_Integer j=1; j <= parts.Length(); j++ ) {
 459             ShapeFix_Face aFixOrient(TopoDS::Face(parts(j)));
 460             aFixOrient.SetContext(aContext);
 461             aFixOrient.FixOrientation();
 462           }
 463
 464           TopoDS_Shape CompRes;
 465           if ( faces.Length() !=1 ) {
 466             TopoDS_Shell S;
 467             B.MakeShell ( S );
 468             for ( i=1; i <= parts.Length(); i++ )
 469               B.Add ( S, parts(i) );
 470             CompRes = S;
 471           }
 472           else CompRes = parts(1);
 473
 474           aContext->Replace(aCurrent,CompRes);
 475         }
 476
 477         // remove the remaining faces
 478         for(i = 2; i <= faces.Length(); i++)
 479           aContext->Remove(faces(i));
 480       }
 481     } // end processing each face
 482
 483     //TopoDS_Shape aResult = Shape;
 484     if (NbModif > 0 && !hasFailed) {
 485       TopoDS_Shape aResult = aContext->Apply(aSolid);
 486
 487       ShapeFix_Edge sfe;
 488       for (exp.Init(aResult,TopAbs_EDGE); exp.More(); exp.Next()) {
 489         TopoDS_Edge E = TopoDS::Edge(exp.Current());
 490         sfe.FixVertexTolerance (E);
 491         // ptv add fix same parameter
 492         sfe.FixSameParameter(E, myTolerance);
 493       }
 494
 495       myContext->Replace(aSolid, aResult);
 496     }
 497     //else
 498     {
 499       for (exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 500         TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 501         Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire;
 502         sfw->SetContext(myContext);
 503         sfw->SetPrecision(myTolerance);
 504         sfw->SetMinTolerance(myTolerance);
 505         sfw->SetMaxTolerance(Max(1.,myTolerance*1000.));
 506         sfw->SetFace(aFace);
 507         for (TopoDS_Iterator iter (aFace,Standard_False); iter.More(); iter.Next()) {
 508           TopoDS_Wire wire = TopoDS::Wire(iter.Value());
 509           sfw->Load(wire);
 510           sfw->FixReorder();
 511           sfw->FixShifted();
 512         }
 513       }
 514     }
 515   } // end processing each solid
 516
 517   aResShape = myContext->Apply(Shape);
 518   return aResShape;
 519 }
 520
 521
 522 //=======================================================================
 523 //function : IsSameDomain
 524 //purpose  :
 525 //=======================================================================
 526
 527 bool getCylinder (Handle(Geom_Surface)& theInSurface, gp_Cylinder& theOutCylinder)
 528 {
 529   bool isCylinder = false;
 530
 531   if (theInSurface->IsKind(STANDARD_TYPE(Geom_CylindricalSurface))) {
 532     Handle(Geom_CylindricalSurface) aGC = Handle(Geom_CylindricalSurface)::DownCast(theInSurface);
 533
 534     theOutCylinder = aGC->Cylinder();
 535     isCylinder = true;
 536   }
 537   else if (theInSurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfRevolution))) {
 538     Handle(Geom_SurfaceOfRevolution) aRS =
 539       Handle(Geom_SurfaceOfRevolution)::DownCast(theInSurface);
 540     Handle(Geom_Curve) aBasis = aRS->BasisCurve();
 541     if (aBasis->IsKind(STANDARD_TYPE(Geom_Line))) {
 542       Handle(Geom_Line) aBasisLine = Handle(Geom_Line)::DownCast(aBasis);
 543       gp_Dir aDir = aRS->Direction();
 544       gp_Dir aBasisDir = aBasisLine->Position().Direction();
 545       if (aBasisDir.IsParallel(aDir, Precision::Confusion())) {
 546         // basis line is parallel to the revolution axis: it is a cylinder
 547         gp_Pnt aLoc = aRS->Location();
 548         Standard_Real aR = aBasisLine->Lin().Distance(aLoc);
 549         gp_Ax3 aCylAx (aLoc, aDir);
 550
 551         theOutCylinder = gp_Cylinder(aCylAx, aR);
 552         isCylinder = true;
 553       }
 554     }
 555   }
 556   else if (theInSurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfLinearExtrusion))) {
 557     Handle(Geom_SurfaceOfLinearExtrusion) aLES =
 558       Handle(Geom_SurfaceOfLinearExtrusion)::DownCast(theInSurface);
 559     Handle(Geom_Curve) aBasis = aLES->BasisCurve();
 560     if (aBasis->IsKind(STANDARD_TYPE(Geom_Circle))) {
 561       Handle(Geom_Circle) aBasisCircle = Handle(Geom_Circle)::DownCast(aBasis);
 562       gp_Dir aDir = aLES->Direction();
 563       gp_Dir aBasisDir = aBasisCircle->Position().Direction();
 564       if (aBasisDir.IsParallel(aDir, Precision::Confusion())) {
 565         // basis circle is normal to the extrusion axis: it is a cylinder
 566         gp_Pnt aLoc = aBasisCircle->Location();
 567         Standard_Real aR = aBasisCircle->Radius();
 568         gp_Ax3 aCylAx (aLoc, aDir);
 569
 570         theOutCylinder = gp_Cylinder(aCylAx, aR);
 571         isCylinder = true;
 572       }
 573     }
 574   }
 575   else {
 576   }
 577
 578   return isCylinder;
 579 }
 580
 581 Standard_Boolean BlockFix_UnionFaces::IsSameDomain(const TopoDS_Face& aFace,
 582                                                    const TopoDS_Face& aCheckedFace) const
 583 {
 584   //checking the same handles
 585   TopLoc_Location L1, L2;
 586   Handle(Geom_Surface) S1, S2;
 587
 588   S1 = BRep_Tool::Surface(aFace,L1);
 589   S2 = BRep_Tool::Surface(aCheckedFace,L2);
 590
 591   if (S1 == S2 && L1 == L2)
 592     return true;
 593
 594   // planar and cylindrical cases (IMP 20052)
 595   Standard_Real aPrec = Precision::Confusion();
 596
 597   S1 = BRep_Tool::Surface(aFace);
 598   S2 = BRep_Tool::Surface(aCheckedFace);
 599
 600   S1 = ClearRts(S1);
 601   S2 = ClearRts(S2);
 602
 603   //Handle(Geom_OffsetSurface) aGOFS1, aGOFS2;
 604   //aGOFS1 = Handle(Geom_OffsetSurface)::DownCast(S1);
 605   //aGOFS2 = Handle(Geom_OffsetSurface)::DownCast(S2);
 606   //if (!aGOFS1.IsNull()) S1 = aGOFS1->BasisSurface();
 607   //if (!aGOFS2.IsNull()) S2 = aGOFS2->BasisSurface();
 608
 609   // case of two elementary surfaces: use OCCT tool
 610   // elementary surfaces: ConicalSurface, CylindricalSurface,
 611   //                      Plane, SphericalSurface and ToroidalSurface
 612   if (S1->IsKind(STANDARD_TYPE(Geom_ElementarySurface)) &&
 613       S2->IsKind(STANDARD_TYPE(Geom_ElementarySurface)))
 614   {
 615     Handle(GeomAdaptor_HSurface) aGA1 = new GeomAdaptor_HSurface(S1);
 616     Handle(GeomAdaptor_HSurface) aGA2 = new GeomAdaptor_HSurface(S2);
 617
 618     Handle(BRepTopAdaptor_TopolTool) aTT1 = new BRepTopAdaptor_TopolTool();
 619     Handle(BRepTopAdaptor_TopolTool) aTT2 = new BRepTopAdaptor_TopolTool();
 620
 621     try {
 622 #if OCC_VERSION_LARGE > 0x06010000
 623       OCC_CATCH_SIGNALS;
 624 #endif
 625
 626 #if OCC_VERSION_LARGE > 0x06040000 // Porting to OCCT6.5.1
 627       IntPatch_ImpImpIntersection anIIInt (aGA1, aTT1, aGA2, aTT2, aPrec, aPrec);
 628 #else
 629       IntPatch_TheIIIntOfIntersection anIIInt (aGA1, aTT1, aGA2, aTT2, aPrec, aPrec);
 630 #endif
 631       if (!anIIInt.IsDone() || anIIInt.IsEmpty())
 632         return false;
 633
 634       return anIIInt.TangentFaces();
 635     }
 636     catch (Standard_Failure) {
 637       return false;
 638     }
 639   }
 640
 641   // case of two planar surfaces:
 642   // all kinds of surfaces checked, including b-spline and bezier
 643   GeomLib_IsPlanarSurface aPlanarityChecker1 (S1, aPrec);
 644   if (aPlanarityChecker1.IsPlanar()) {
 645     GeomLib_IsPlanarSurface aPlanarityChecker2 (S2, aPrec);
 646     if (aPlanarityChecker2.IsPlanar()) {
 647       gp_Pln aPln1 = aPlanarityChecker1.Plan();
 648       gp_Pln aPln2 = aPlanarityChecker2.Plan();
 649
 650       if (aPln1.Position().Direction().IsParallel(aPln2.Position().Direction(), aPrec) &&
 651           aPln1.Distance(aPln2) < aPrec) {
 652         return true;
 653       }
 654     }
 655   }
 656
 657   // case of two cylindrical surfaces, at least one of which is a swept surface
 658   // swept surfaces: SurfaceOfLinearExtrusion, SurfaceOfRevolution
 659   if ((S1->IsKind(STANDARD_TYPE(Geom_CylindricalSurface)) ||
 660        S1->IsKind(STANDARD_TYPE(Geom_SweptSurface))) &&
 661       (S2->IsKind(STANDARD_TYPE(Geom_CylindricalSurface)) ||
 662        S2->IsKind(STANDARD_TYPE(Geom_SweptSurface))))
 663   {
 664     gp_Cylinder aCyl1, aCyl2;
 665     if (getCylinder(S1, aCyl1) && getCylinder(S2, aCyl2)) {
 666       if (fabs(aCyl1.Radius() - aCyl2.Radius()) < aPrec) {
 667         gp_Dir aDir1 = aCyl1.Position().Direction();
 668         gp_Dir aDir2 = aCyl2.Position().Direction();
 669         if (aDir1.IsParallel(aDir2, aPrec)) {
 670           gp_Pnt aLoc1 = aCyl1.Location();
 671           gp_Pnt aLoc2 = aCyl2.Location();
 672           gp_Vec aVec12 (aLoc1, aLoc2);
 673           if (aVec12.SquareMagnitude() < aPrec*aPrec ||
 674               aVec12.IsParallel(aDir1, aPrec)) {
 675             return true;
 676           }
 677         }
 678       }
 679     }
 680   }
 681
 682   return false;
 683 }
 684
 685
 686 //=======================================================================
 687 //function : MovePCurves
 688 //purpose  :
 689 //=======================================================================
 690
 691 void BlockFix_UnionFaces::MovePCurves(TopoDS_Face& aTarget,
 692                                       const TopoDS_Face& aSource) const
 693 {
 694   BRep_Builder B;
 695   for(TopExp_Explorer wexp(aSource,TopAbs_WIRE);wexp.More();wexp.Next()) {
 696     Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(TopoDS::Wire(wexp.Current()),
 697                                                   aTarget, Precision::Confusion());
 698     sfw->FixReorder();
 699     Standard_Boolean isReoredFailed = sfw->StatusReorder ( ShapeExtend_FAIL );
 700     sfw->FixEdgeCurves();
 701     if(isReoredFailed)
 702       continue;
 703
 704     sfw->FixShifted();
 705     sfw->FixDegenerated();
 706
 707     // remove degenerated edges from not degenerated points
 708     ShapeAnalysis_Edge sae;
 709     Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 710     for(Standard_Integer i = 1; i<=sewd->NbEdges();i++) {
 711       TopoDS_Edge E = sewd->Edge(i);
 712       if(BRep_Tool::Degenerated(E)&&!sae.HasPCurve(E,aTarget)) {
 713         sewd->Remove(i);
 714         i--;
 715       }
 716     }
 717
 718     TopoDS_Wire ResWire = sfw->Wire();
 719     B.Add(aTarget,ResWire);
 720   }
 721 }