src/BlockFix/BlockFix_UnionFaces.cxx

   1 // Copyright (C) 2007-2012  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.hxx>
  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 #include <TopoDS_Shape.hxx>
  76
  77 #include <TColGeom_HArray2OfSurface.hxx>
  78
  79 #include <GeomAdaptor_HSurface.hxx>
  80 #include <GeomLib_IsPlanarSurface.hxx>
  81
  82 #include <Geom_Surface.hxx>
  83 #include <Geom_Plane.hxx>
  84 #include <Geom_OffsetSurface.hxx>
  85 #include <Geom_SphericalSurface.hxx>
  86 #include <Geom_CylindricalSurface.hxx>
  87 #include <Geom_SurfaceOfRevolution.hxx>
  88 #include <Geom_SurfaceOfLinearExtrusion.hxx>
  89 #include <Geom_RectangularTrimmedSurface.hxx>
  90
  91 #include <Geom_Curve.hxx>
  92 #include <Geom_Line.hxx>
  93 #include <Geom_Circle.hxx>
  94
  95 #include <Geom2d_Line.hxx>
  96
  97 #include <gp_XY.hxx>
  98 #include <gp_Pnt2d.hxx>
  99
 100 #include <Standard_Failure.hxx>
 101 #include <Standard_ErrorHandler.hxx> // CAREFUL ! position of this file is critic : see Lucien PIGNOLONI / OCC
 102
 103 //=======================================================================
 104 //function : BlockFix_UnionFaces
 105 //purpose  :
 106 //=======================================================================
 107 BlockFix_UnionFaces::BlockFix_UnionFaces()
 108   : myTolerance(Precision::Confusion()),
 109     myOptimumNbFaces(6)
 110 {
 111 }
 112
 113 //=======================================================================
 114 //function : GetTolerance
 115 //purpose  :
 116 //=======================================================================
 117 Standard_Real& BlockFix_UnionFaces::GetTolerance()
 118 {
 119   return myTolerance;
 120 }
 121
 122 //=======================================================================
 123 //function : GetOptimumNbFaces
 124 //purpose  :
 125 //=======================================================================
 126 Standard_Integer& BlockFix_UnionFaces::GetOptimumNbFaces()
 127 {
 128   return myOptimumNbFaces;
 129 }
 130
 131 //=======================================================================
 132 //function : AddOrdinaryEdges
 133 //purpose  : auxilary
 134 //           adds edges from the shape to the sequence
 135 //           seams and equal edges are dropped
 136 //           Returns true if one of original edges dropped
 137 //=======================================================================
 138 static Standard_Boolean AddOrdinaryEdges(TopTools_SequenceOfShape& edges,
 139                                          const TopoDS_Shape aShape,
 140                                          Standard_Integer& anIndex)
 141 {
 142   //map of edges
 143   TopTools_MapOfShape aNewEdges;
 144   //add edges without seams
 145   for(TopExp_Explorer exp(aShape,TopAbs_EDGE); exp.More(); exp.Next()) {
 146     TopoDS_Shape edge = exp.Current();
 147     if(aNewEdges.Contains(edge))
 148       aNewEdges.Remove(edge);
 149     else
 150       aNewEdges.Add(edge);
 151   }
 152
 153   Standard_Boolean isDropped = Standard_False;
 154   //merge edges and drop seams
 155   for(Standard_Integer i = 1; i <= edges.Length(); i++) {
 156     TopoDS_Shape current = edges(i);
 157     if(aNewEdges.Contains(current)) {
 158
 159       aNewEdges.Remove(current);
 160       edges.Remove(i);
 161       i--;
 162
 163       if(!isDropped) {
 164         isDropped = Standard_True;
 165         anIndex = i;
 166       }
 167     }
 168   }
 169
 170   //add edges to the sequemce
 171   for(TopTools_MapIteratorOfMapOfShape anIter(aNewEdges); anIter.More(); anIter.Next())
 172     edges.Append(anIter.Key());
 173
 174   return isDropped;
 175 }
 176
 177 //=======================================================================
 178 //function : ClearRts
 179 //purpose  : auxilary
 180 //=======================================================================
 181 static Handle(Geom_Surface) ClearRts(const Handle(Geom_Surface)& aSurface)
 182 {
 183   if(aSurface->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface))) {
 184     Handle(Geom_RectangularTrimmedSurface) rts =
 185       Handle(Geom_RectangularTrimmedSurface)::DownCast(aSurface);
 186     return rts->BasisSurface();
 187   }
 188   return aSurface;
 189 }
 190
 191 //=======================================================================
 192 //function : Perform
 193 //purpose  :
 194 //=======================================================================
 195 TopoDS_Shape BlockFix_UnionFaces::Perform(const TopoDS_Shape& Shape)
 196 {
 197   Handle(ShapeBuild_ReShape) myContext = new ShapeBuild_ReShape;
 198   TopoDS_Shape aResShape = myContext->Apply(Shape);
 199
 200   // processing each solid
 201   TopExp_Explorer exps;
 202   for (exps.Init(Shape, TopAbs_SOLID); exps.More(); exps.Next()) {
 203     TopoDS_Solid aSolid = TopoDS::Solid(exps.Current());
 204
 205     // creating map of edge faces
 206     TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces;
 207     TopExp::MapShapesAndAncestors(aSolid, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces);
 208
 209     // map of processed shapes
 210     TopTools_MapOfShape aProcessed;
 211
 212     Handle(ShapeBuild_ReShape) aContext = new ShapeBuild_ReShape;
 213
 214     Standard_Integer NbModif = 0;
 215     Standard_Boolean hasFailed = Standard_False;
 216     Standard_Real tol = Min(Max(Precision::Confusion(), myTolerance/10.), 0.1);
 217
 218     // count faces
 219     int nbf = 0;
 220     TopExp_Explorer exp;
 221     TopTools_MapOfShape mapF;
 222     for (exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 223       if (mapF.Add(exp.Current()))
 224         nbf++;
 225     }
 226
 227     bool doUnion = ((myOptimumNbFaces == 0) ||
 228                     ((myOptimumNbFaces > 0) && (nbf > myOptimumNbFaces)));
 229
 230     // processing each face
 231     mapF.Clear();
 232     for (exp.Init(aSolid, TopAbs_FACE); exp.More() && doUnion; exp.Next()) {
 233       TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 234
 235       if (aProcessed.Contains(aFace))
 236         continue;
 237
 238       Standard_Integer dummy;
 239       TopTools_SequenceOfShape edges;
 240       AddOrdinaryEdges(edges,aFace,dummy);
 241
 242       TopTools_SequenceOfShape faces;
 243       faces.Append(aFace);
 244
 245       //surface and location to construct result
 246       TopLoc_Location aBaseLocation;
 247       Handle(Geom_Surface) aBaseSurface = BRep_Tool::Surface(aFace,aBaseLocation);
 248       aBaseSurface = ClearRts(aBaseSurface);
 249
 250       // find adjacent faces to union
 251       Standard_Integer i;
 252       for (i = 1; i <= edges.Length(); i++) {
 253         TopoDS_Edge edge = TopoDS::Edge(edges(i));
 254         if (BRep_Tool::Degenerated(edge))
 255           continue;
 256
 257         const TopTools_ListOfShape& aList = aMapEdgeFaces.FindFromKey(edge);
 258         TopTools_ListIteratorOfListOfShape anIter(aList);
 259         for (; anIter.More(); anIter.Next()) {
 260           TopoDS_Face anCheckedFace = TopoDS::Face(anIter.Value().Oriented(TopAbs_FORWARD));
 261           if (anCheckedFace.IsSame(aFace))
 262             continue;
 263
 264           if (aProcessed.Contains(anCheckedFace))
 265             continue;
 266
 267           if (IsSameDomain(aFace,anCheckedFace)) {
 268
 269             if (aList.Extent() != 2) {
 270               // non mainfold case is not processed
 271               continue;
 272             }
 273
 274             // replacing pcurves
 275             TopoDS_Face aMockUpFace;
 276             BRep_Builder B;
 277             B.MakeFace(aMockUpFace,aBaseSurface,aBaseLocation,0.);
 278             MovePCurves(aMockUpFace,anCheckedFace);
 279
 280             if (AddOrdinaryEdges(edges,aMockUpFace,dummy)) {
 281               // sequence edges is modified
 282               i = dummy;
 283             }
 284
 285             faces.Append(anCheckedFace);
 286             aProcessed.Add(anCheckedFace);
 287             break;
 288           }
 289         }
 290       }
 291
 292       // all faces collected in the sequence. Perform union of faces
 293       if (faces.Length() > 1) {
 294         NbModif++;
 295         TopoDS_Face aResult;
 296         BRep_Builder B;
 297         B.MakeFace(aResult,aBaseSurface,aBaseLocation,0);
 298         Standard_Integer nbWires = 0;
 299
 300         // connecting wires
 301         while (edges.Length()>0) {
 302
 303           Standard_Boolean isEdge3d = Standard_False;
 304           nbWires++;
 305           TopTools_MapOfShape aVertices;
 306           TopoDS_Wire aWire;
 307           B.MakeWire(aWire);
 308
 309           TopoDS_Edge anEdge = TopoDS::Edge(edges(1));
 310           edges.Remove(1);
 311
 312           isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 313           B.Add(aWire,anEdge);
 314           TopoDS_Vertex V1,V2;
 315           TopExp::Vertices(anEdge,V1,V2);
 316           aVertices.Add(V1);
 317           aVertices.Add(V2);
 318
 319           Standard_Boolean isNewFound = Standard_False;
 320           do {
 321             isNewFound = Standard_False;
 322             for(Standard_Integer j = 1; j <= edges.Length(); j++) {
 323               anEdge = TopoDS::Edge(edges(j));
 324               TopExp::Vertices(anEdge,V1,V2);
 325               if(aVertices.Contains(V1) || aVertices.Contains(V2)) {
 326                 isEdge3d |= !BRep_Tool::Degenerated(anEdge);
 327                 aVertices.Add(V1);
 328                 aVertices.Add(V2);
 329                 B.Add(aWire,anEdge);
 330                 edges.Remove(j);
 331                 j--;
 332                 isNewFound = Standard_True;
 333               }
 334             }
 335           } while (isNewFound);
 336
 337           // sorting any type of edges
 338           aWire = TopoDS::Wire(aContext->Apply(aWire));
 339
 340           TopoDS_Face tmpF = TopoDS::Face(aContext->Apply(faces(1).Oriented(TopAbs_FORWARD)));
 341           Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(aWire,tmpF,Precision::Confusion());
 342           sfw->FixReorder();
 343           Standard_Boolean isDegRemoved = Standard_False;
 344           if(!sfw->StatusReorder ( ShapeExtend_FAIL )) {
 345             // clear degenerated edges if at least one with 3d curve exist
 346             if(isEdge3d) {
 347               Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 348               for(Standard_Integer j = 1; j<=sewd->NbEdges();j++) {
 349                 TopoDS_Edge E = sewd->Edge(j);
 350                 if(BRep_Tool::Degenerated(E)) {
 351                   sewd->Remove(j);
 352                   isDegRemoved = Standard_True;
 353                   j--;
 354                 }
 355               }
 356             }
 357             sfw->FixShifted();
 358             if(isDegRemoved)
 359               sfw->FixDegenerated();
 360           }
 361           TopoDS_Wire aWireFixed = sfw->Wire();
 362           aContext->Replace(aWire,aWireFixed);
 363           // add resulting wire
 364           if(isEdge3d) {
 365             B.Add(aResult,aWireFixed);
 366           }
 367           else  {
 368             // sorting edges
 369             Handle(ShapeExtend_WireData) sbwd = sfw->WireData();
 370             Standard_Integer nbEdges = sbwd->NbEdges();
 371             // sort degenerated edges and create one edge instead of several ones
 372             ShapeAnalysis_WireOrder sawo(Standard_False, 0);
 373             ShapeAnalysis_Edge sae;
 374             Standard_Integer aLastEdge = nbEdges;
 375             for(Standard_Integer j = 1; j <= nbEdges; j++) {
 376               Standard_Real f,l;
 377               //smh protection on NULL pcurve
 378               Handle(Geom2d_Curve) c2d;
 379               if(!sae.PCurve(sbwd->Edge(j),tmpF,c2d,f,l)) {
 380                 aLastEdge--;
 381                 continue;
 382               }
 383               sawo.Add(c2d->Value(f).XY(),c2d->Value(l).XY());
 384             }
 385             sawo.Perform();
 386
 387             // constructind one degenerative edge
 388             gp_XY aStart, anEnd, tmp;
 389             Standard_Integer nbFirst = sawo.Ordered(1);
 390             TopoDS_Edge anOrigE = TopoDS::Edge(sbwd->Edge(nbFirst).Oriented(TopAbs_FORWARD));
 391             ShapeBuild_Edge sbe;
 392             TopoDS_Vertex aDummyV;
 393             TopoDS_Edge E = sbe.CopyReplaceVertices(anOrigE,aDummyV,aDummyV);
 394             sawo.XY(nbFirst,aStart,tmp);
 395             sawo.XY(sawo.Ordered(aLastEdge),tmp,anEnd);
 396
 397             gp_XY aVec = anEnd-aStart;
 398             Handle(Geom2d_Line) aLine = new Geom2d_Line(aStart,gp_Dir2d(anEnd-aStart));
 399
 400             B.UpdateEdge(E,aLine,tmpF,0.);
 401             B.Range(E,tmpF,0.,aVec.Modulus());
 402             Handle(Geom_Curve) C3d;
 403             B.UpdateEdge(E,C3d,0.);
 404             B.Degenerated(E,Standard_True);
 405             TopoDS_Wire aW;
 406             B.MakeWire(aW);
 407             B.Add(aW,E);
 408             B.Add(aResult,aW);
 409           }
 410         }
 411
 412         // perform substitution of face
 413         aContext->Replace(aContext->Apply(aFace),aResult);
 414
 415         ShapeFix_Face sff (aResult);
 416         //Intializing by tolerances
 417         sff.SetPrecision(myTolerance);
 418         sff.SetMinTolerance(tol);
 419         sff.SetMaxTolerance(Max(1.,myTolerance*1000.));
 420         //Setting modes
 421         sff.FixOrientationMode() = 0;
 422         //sff.FixWireMode() = 0;
 423         sff.SetContext(aContext);
 424         // Applying the fixes
 425         sff.Perform();
 426         if(sff.Status(ShapeExtend_FAIL))
 427         hasFailed = Standard_True;
 428
 429         // breaking down to several faces
 430         TopoDS_Shape theResult = aContext->Apply(aResult);
 431         for (TopExp_Explorer aFaceExp (theResult,TopAbs_FACE); aFaceExp.More(); aFaceExp.Next()) {
 432           TopoDS_Face aCurrent = TopoDS::Face(aFaceExp.Current().Oriented(TopAbs_FORWARD));
 433           Handle(TColGeom_HArray2OfSurface) grid = new TColGeom_HArray2OfSurface ( 1, 1, 1, 1 );
 434           grid->SetValue ( 1, 1, aBaseSurface );
 435           Handle(ShapeExtend_CompositeSurface) G = new ShapeExtend_CompositeSurface ( grid );
 436           ShapeFix_ComposeShell CompShell;
 437           CompShell.Init ( G, aBaseLocation, aCurrent, ::Precision::Confusion() );//myPrecision
 438           CompShell.SetContext( aContext );
 439
 440           TopTools_SequenceOfShape parts;
 441           ShapeFix_SequenceOfWireSegment wires;
 442           for(TopExp_Explorer W_Exp(aCurrent,TopAbs_WIRE);W_Exp.More();W_Exp.Next()) {
 443             Handle(ShapeExtend_WireData) sbwd =
 444               new ShapeExtend_WireData ( TopoDS::Wire(W_Exp.Current() ));
 445             ShapeFix_WireSegment seg ( sbwd, TopAbs_REVERSED );
 446             wires.Append(seg);
 447           }
 448
 449           CompShell.DispatchWires ( parts,wires );
 450           for (Standard_Integer j=1; j <= parts.Length(); j++ ) {
 451             ShapeFix_Face aFixOrient(TopoDS::Face(parts(j)));
 452             aFixOrient.SetContext(aContext);
 453             aFixOrient.FixOrientation();
 454           }
 455
 456           TopoDS_Shape CompRes;
 457           if ( faces.Length() !=1 ) {
 458             TopoDS_Shell S;
 459             B.MakeShell ( S );
 460             for ( i=1; i <= parts.Length(); i++ )
 461               B.Add ( S, parts(i) );
 462             CompRes = S;
 463           }
 464           else CompRes = parts(1);
 465
 466           aContext->Replace(aCurrent,CompRes);
 467         }
 468
 469         // remove the remaining faces
 470         for(i = 2; i <= faces.Length(); i++)
 471           aContext->Remove(faces(i));
 472       }
 473     } // end processing each face
 474
 475     //TopoDS_Shape aResult = Shape;
 476     if (NbModif > 0 && !hasFailed) {
 477       TopoDS_Shape aResult = aContext->Apply(aSolid);
 478
 479       ShapeFix_Edge sfe;
 480       for (exp.Init(aResult,TopAbs_EDGE); exp.More(); exp.Next()) {
 481         TopoDS_Edge E = TopoDS::Edge(exp.Current());
 482         sfe.FixVertexTolerance (E);
 483         // ptv add fix same parameter
 484         sfe.FixSameParameter(E, myTolerance);
 485       }
 486
 487       myContext->Replace(aSolid, aResult);
 488     }
 489     //else
 490     {
 491       for (exp.Init(aSolid, TopAbs_FACE); exp.More(); exp.Next()) {
 492         TopoDS_Face aFace = TopoDS::Face(exp.Current().Oriented(TopAbs_FORWARD));
 493         Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire;
 494         sfw->SetContext(myContext);
 495         sfw->SetPrecision(myTolerance);
 496         sfw->SetMinTolerance(myTolerance);
 497         sfw->SetMaxTolerance(Max(1.,myTolerance*1000.));
 498         sfw->SetFace(aFace);
 499         for (TopoDS_Iterator iter (aFace,Standard_False); iter.More(); iter.Next()) {
 500           TopoDS_Wire wire = TopoDS::Wire(iter.Value());
 501           sfw->Load(wire);
 502           sfw->FixReorder();
 503           sfw->FixShifted();
 504         }
 505       }
 506     }
 507   } // end processing each solid
 508
 509   aResShape = myContext->Apply(Shape);
 510   return aResShape;
 511 }
 512
 513 //=======================================================================
 514 //function : IsSameDomain
 515 //purpose  :
 516 //=======================================================================
 517 bool getCylinder (Handle(Geom_Surface)& theInSurface, gp_Cylinder& theOutCylinder)
 518 {
 519   bool isCylinder = false;
 520
 521   if (theInSurface->IsKind(STANDARD_TYPE(Geom_CylindricalSurface))) {
 522     Handle(Geom_CylindricalSurface) aGC = Handle(Geom_CylindricalSurface)::DownCast(theInSurface);
 523
 524     theOutCylinder = aGC->Cylinder();
 525     isCylinder = true;
 526   }
 527   else if (theInSurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfRevolution))) {
 528     Handle(Geom_SurfaceOfRevolution) aRS =
 529       Handle(Geom_SurfaceOfRevolution)::DownCast(theInSurface);
 530     Handle(Geom_Curve) aBasis = aRS->BasisCurve();
 531     if (aBasis->IsKind(STANDARD_TYPE(Geom_Line))) {
 532       Handle(Geom_Line) aBasisLine = Handle(Geom_Line)::DownCast(aBasis);
 533       gp_Dir aDir = aRS->Direction();
 534       gp_Dir aBasisDir = aBasisLine->Position().Direction();
 535       if (aBasisDir.IsParallel(aDir, Precision::Confusion())) {
 536         // basis line is parallel to the revolution axis: it is a cylinder
 537         gp_Pnt aLoc = aRS->Location();
 538         Standard_Real aR = aBasisLine->Lin().Distance(aLoc);
 539         gp_Ax3 aCylAx (aLoc, aDir);
 540
 541         theOutCylinder = gp_Cylinder(aCylAx, aR);
 542         isCylinder = true;
 543       }
 544     }
 545   }
 546   else if (theInSurface->IsKind(STANDARD_TYPE(Geom_SurfaceOfLinearExtrusion))) {
 547     Handle(Geom_SurfaceOfLinearExtrusion) aLES =
 548       Handle(Geom_SurfaceOfLinearExtrusion)::DownCast(theInSurface);
 549     Handle(Geom_Curve) aBasis = aLES->BasisCurve();
 550     if (aBasis->IsKind(STANDARD_TYPE(Geom_Circle))) {
 551       Handle(Geom_Circle) aBasisCircle = Handle(Geom_Circle)::DownCast(aBasis);
 552       gp_Dir aDir = aLES->Direction();
 553       gp_Dir aBasisDir = aBasisCircle->Position().Direction();
 554       if (aBasisDir.IsParallel(aDir, Precision::Confusion())) {
 555         // basis circle is normal to the extrusion axis: it is a cylinder
 556         gp_Pnt aLoc = aBasisCircle->Location();
 557         Standard_Real aR = aBasisCircle->Radius();
 558         gp_Ax3 aCylAx (aLoc, aDir);
 559
 560         theOutCylinder = gp_Cylinder(aCylAx, aR);
 561         isCylinder = true;
 562       }
 563     }
 564   }
 565   else {
 566   }
 567
 568   return isCylinder;
 569 }
 570
 571 Standard_Boolean BlockFix_UnionFaces::IsSameDomain(const TopoDS_Face& aFace,
 572                                                    const TopoDS_Face& aCheckedFace) const
 573 {
 574   //checking the same handles
 575   TopLoc_Location L1, L2;
 576   Handle(Geom_Surface) S1, S2;
 577
 578   S1 = BRep_Tool::Surface(aFace,L1);
 579   S2 = BRep_Tool::Surface(aCheckedFace,L2);
 580
 581   if (S1 == S2 && L1 == L2)
 582     return true;
 583
 584   // planar and cylindrical cases (IMP 20052)
 585   Standard_Real aPrec = Precision::Confusion();
 586
 587   S1 = BRep_Tool::Surface(aFace);
 588   S2 = BRep_Tool::Surface(aCheckedFace);
 589
 590   S1 = ClearRts(S1);
 591   S2 = ClearRts(S2);
 592
 593   //Handle(Geom_OffsetSurface) aGOFS1, aGOFS2;
 594   //aGOFS1 = Handle(Geom_OffsetSurface)::DownCast(S1);
 595   //aGOFS2 = Handle(Geom_OffsetSurface)::DownCast(S2);
 596   //if (!aGOFS1.IsNull()) S1 = aGOFS1->BasisSurface();
 597   //if (!aGOFS2.IsNull()) S2 = aGOFS2->BasisSurface();
 598
 599   // case of two elementary surfaces: use OCCT tool
 600   // elementary surfaces: ConicalSurface, CylindricalSurface,
 601   //                      Plane, SphericalSurface and ToroidalSurface
 602   if (S1->IsKind(STANDARD_TYPE(Geom_ElementarySurface)) &&
 603       S2->IsKind(STANDARD_TYPE(Geom_ElementarySurface)))
 604   {
 605     Handle(GeomAdaptor_HSurface) aGA1 = new GeomAdaptor_HSurface(S1);
 606     Handle(GeomAdaptor_HSurface) aGA2 = new GeomAdaptor_HSurface(S2);
 607
 608     Handle(BRepTopAdaptor_TopolTool) aTT1 = new BRepTopAdaptor_TopolTool();
 609     Handle(BRepTopAdaptor_TopolTool) aTT2 = new BRepTopAdaptor_TopolTool();
 610
 611     try {
 612 #if OCC_VERSION_LARGE > 0x06010000
 613       OCC_CATCH_SIGNALS;
 614 #endif
 615
 616 #if OCC_VERSION_LARGE > 0x06040000 // Porting to OCCT6.5.1
 617       IntPatch_ImpImpIntersection anIIInt (aGA1, aTT1, aGA2, aTT2, aPrec, aPrec);
 618 #else
 619       IntPatch_TheIIIntOfIntersection anIIInt (aGA1, aTT1, aGA2, aTT2, aPrec, aPrec);
 620 #endif
 621       if (!anIIInt.IsDone() || anIIInt.IsEmpty())
 622         return false;
 623
 624       return anIIInt.TangentFaces();
 625     }
 626     catch (Standard_Failure) {
 627       return false;
 628     }
 629   }
 630
 631   // case of two planar surfaces:
 632   // all kinds of surfaces checked, including b-spline and bezier
 633   GeomLib_IsPlanarSurface aPlanarityChecker1 (S1, aPrec);
 634   if (aPlanarityChecker1.IsPlanar()) {
 635     GeomLib_IsPlanarSurface aPlanarityChecker2 (S2, aPrec);
 636     if (aPlanarityChecker2.IsPlanar()) {
 637       gp_Pln aPln1 = aPlanarityChecker1.Plan();
 638       gp_Pln aPln2 = aPlanarityChecker2.Plan();
 639
 640       if (aPln1.Position().Direction().IsParallel(aPln2.Position().Direction(), aPrec) &&
 641           aPln1.Distance(aPln2) < aPrec) {
 642         return true;
 643       }
 644     }
 645   }
 646
 647   // case of two cylindrical surfaces, at least one of which is a swept surface
 648   // swept surfaces: SurfaceOfLinearExtrusion, SurfaceOfRevolution
 649   if ((S1->IsKind(STANDARD_TYPE(Geom_CylindricalSurface)) ||
 650        S1->IsKind(STANDARD_TYPE(Geom_SweptSurface))) &&
 651       (S2->IsKind(STANDARD_TYPE(Geom_CylindricalSurface)) ||
 652        S2->IsKind(STANDARD_TYPE(Geom_SweptSurface))))
 653   {
 654     gp_Cylinder aCyl1, aCyl2;
 655     if (getCylinder(S1, aCyl1) && getCylinder(S2, aCyl2)) {
 656       if (fabs(aCyl1.Radius() - aCyl2.Radius()) < aPrec) {
 657         gp_Dir aDir1 = aCyl1.Position().Direction();
 658         gp_Dir aDir2 = aCyl2.Position().Direction();
 659         if (aDir1.IsParallel(aDir2, aPrec)) {
 660           gp_Pnt aLoc1 = aCyl1.Location();
 661           gp_Pnt aLoc2 = aCyl2.Location();
 662           gp_Vec aVec12 (aLoc1, aLoc2);
 663           if (aVec12.SquareMagnitude() < aPrec*aPrec ||
 664               aVec12.IsParallel(aDir1, aPrec)) {
 665             return true;
 666           }
 667         }
 668       }
 669     }
 670   }
 671
 672   return false;
 673 }
 674
 675 //=======================================================================
 676 //function : MovePCurves
 677 //purpose  :
 678 //=======================================================================
 679 void BlockFix_UnionFaces::MovePCurves(TopoDS_Face& aTarget,
 680                                       const TopoDS_Face& aSource) const
 681 {
 682   BRep_Builder B;
 683   for(TopExp_Explorer wexp(aSource,TopAbs_WIRE);wexp.More();wexp.Next()) {
 684     Handle(ShapeFix_Wire) sfw = new ShapeFix_Wire(TopoDS::Wire(wexp.Current()),
 685                                                   aTarget, Precision::Confusion());
 686     sfw->FixReorder();
 687     Standard_Boolean isReoredFailed = sfw->StatusReorder ( ShapeExtend_FAIL );
 688     sfw->FixEdgeCurves();
 689     if(isReoredFailed)
 690       continue;
 691
 692     sfw->FixShifted();
 693     sfw->FixDegenerated();
 694
 695     // remove degenerated edges from not degenerated points
 696     ShapeAnalysis_Edge sae;
 697     Handle(ShapeExtend_WireData) sewd = sfw->WireData();
 698     for(Standard_Integer i = 1; i<=sewd->NbEdges();i++) {
 699       TopoDS_Edge E = sewd->Edge(i);
 700       if(BRep_Tool::Degenerated(E)&&!sae.HasPCurve(E,aTarget)) {
 701         sewd->Remove(i);
 702         i--;
 703       }
 704     }
 705
 706     TopoDS_Wire ResWire = sfw->Wire();
 707     B.Add(aTarget,ResWire);
 708   }
 709 }