src/GEOMImpl/GEOMImpl_ShapeDriver.cxx

   1 //  Copyright (C) 2007-2010  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 #include <GEOMImpl_ShapeDriver.hxx>
  23
  24 #include <GEOMImpl_IShapes.hxx>
  25 #include <GEOMImpl_IVector.hxx>
  26 #include <GEOMImpl_Types.hxx>
  27 #include <GEOMImpl_Block6Explorer.hxx>
  28
  29 #include <GEOM_Function.hxx>
  30
  31 // OCCT Includes
  32 #include <ShapeFix_Wire.hxx>
  33 #include <ShapeFix_Edge.hxx>
  34 #include <ShapeFix_Shape.hxx>
  35
  36 #include <BRep_Builder.hxx>
  37 #include <BRep_Tool.hxx>
  38 #include <BRepAdaptor_Curve.hxx>
  39 #include <BRepAlgo_FaceRestrictor.hxx>
  40 #include <BRepBuilderAPI_Copy.hxx>
  41 #include <BRepBuilderAPI_Sewing.hxx>
  42 #include <BRepBuilderAPI_MakeWire.hxx>
  43 #include <BRepBuilderAPI_MakeEdge.hxx>
  44 #include <BRepCheck.hxx>
  45 #include <BRepCheck_Analyzer.hxx>
  46 #include <BRepCheck_Shell.hxx>
  47 #include <BRepClass3d_SolidClassifier.hxx>
  48 #include <BRepLib.hxx>
  49 #include <BRepLib_MakeEdge.hxx>
  50 #include <BRepTools_WireExplorer.hxx>
  51
  52 #include <ShapeAnalysis_FreeBounds.hxx>
  53
  54 #include <TopAbs.hxx>
  55 #include <TopExp.hxx>
  56 #include <TopExp_Explorer.hxx>
  57 #include <TopoDS.hxx>
  58 #include <TopoDS_Shape.hxx>
  59 #include <TopoDS_Edge.hxx>
  60 #include <TopoDS_Wire.hxx>
  61 #include <TopoDS_Shell.hxx>
  62 #include <TopoDS_Solid.hxx>
  63 #include <TopoDS_Compound.hxx>
  64 #include <TopoDS_Iterator.hxx>
  65
  66 #include <TopTools_MapOfShape.hxx>
  67 #include <TopTools_HSequenceOfShape.hxx>
  68
  69 #include <ElCLib.hxx>
  70
  71 #include <GCPnts_AbscissaPoint.hxx>
  72
  73 #include <Geom_TrimmedCurve.hxx>
  74 #include <GeomAbs_CurveType.hxx>
  75 #include <GeomConvert_CompCurveToBSplineCurve.hxx>
  76 #include <GeomConvert.hxx>
  77 #include <GeomLProp.hxx>
  78
  79 #include <TColStd_SequenceOfReal.hxx>
  80 #include <TColStd_HSequenceOfTransient.hxx>
  81 #include <TColStd_Array1OfReal.hxx>
  82 #include <TColGeom_SequenceOfCurve.hxx>
  83 #include <TColGeom_Array1OfBSplineCurve.hxx>
  84 #include <TColGeom_HArray1OfBSplineCurve.hxx>
  85
  86 #include <Precision.hxx>
  87
  88 #include <Standard_NullObject.hxx>
  89 #include <Standard_TypeMismatch.hxx>
  90 #include <Standard_ConstructionError.hxx>
  91
  92 //=======================================================================
  93 //function : GetID
  94 //purpose  :
  95 //=======================================================================
  96 const Standard_GUID& GEOMImpl_ShapeDriver::GetID()
  97 {
  98   static Standard_GUID aShapeDriver("FF1BBB54-5D14-4df2-980B-3A668264EA16");
  99   return aShapeDriver;
 100 }
 101
 102
 103 //=======================================================================
 104 //function : GEOMImpl_ShapeDriver
 105 //purpose  :
 106 //=======================================================================
 107 GEOMImpl_ShapeDriver::GEOMImpl_ShapeDriver()
 108 {
 109 }
 110
 111 //=======================================================================
 112 //function : Execute
 113 //purpose  :
 114 //=======================================================================
 115 Standard_Integer GEOMImpl_ShapeDriver::Execute(TFunction_Logbook& log) const
 116 {
 117   if (Label().IsNull()) return 0;
 118   Handle(GEOM_Function) aFunction = GEOM_Function::GetFunction(Label());
 119
 120   GEOMImpl_IShapes aCI (aFunction);
 121   Standard_Integer aType = aFunction->GetType();
 122
 123   TopoDS_Shape aShape;
 124   BRep_Builder B;
 125
 126   if (aType == WIRE_EDGES) {
 127     Handle(TColStd_HSequenceOfTransient) aShapes = aCI.GetShapes();
 128     TopoDS_Wire aWire;
 129     B.MakeWire(aWire);
 130
 131     // add edges
 132     for (unsigned int ind = 1; ind <= aShapes->Length(); ind++) {
 133       Handle(GEOM_Function) aRefShape = Handle(GEOM_Function)::DownCast(aShapes->Value(ind));
 134       TopoDS_Shape aShape_i = aRefShape->GetValue();
 135       if (aShape_i.IsNull()) {
 136         Standard_NullObject::Raise("Shape for wire construction is null");
 137       }
 138      if (aShape_i.ShapeType() == TopAbs_EDGE || aShape_i.ShapeType() == TopAbs_WIRE) {
 139        TopExp_Explorer exp (aShape_i, TopAbs_EDGE);
 140        for (; exp.More(); exp.Next())
 141          B.Add(aWire, TopoDS::Edge(exp.Current()));
 142      } else {
 143        Standard_TypeMismatch::Raise
 144          ("Shape for wire construction is neither an edge nor a wire");
 145      }
 146     }
 147
 148     // fix edges order
 149     Handle(ShapeFix_Wire) aFW = new ShapeFix_Wire;
 150     aFW->Load(aWire);
 151     aFW->FixReorder();
 152
 153     if (aFW->StatusReorder(ShapeExtend_FAIL1)) {
 154       Standard_ConstructionError::Raise("Wire construction failed: several loops detected");
 155     } else if (aFW->StatusReorder(ShapeExtend_FAIL)) {
 156       Standard_ConstructionError::Raise("Wire construction failed");
 157     } else {
 158     }
 159
 160     // IMP 0019766: Building a Wire from unconnected edges by introducing a tolerance
 161     Standard_Real aTolerance = aCI.GetTolerance();
 162     if (aTolerance < Precision::Confusion())
 163       aTolerance = Precision::Confusion();
 164
 165     aFW->ClosedWireMode() = Standard_False;
 166     aFW->FixConnected(aTolerance);
 167     if (aFW->StatusConnected(ShapeExtend_FAIL)) {
 168       Standard_ConstructionError::Raise("Wire construction failed: cannot build connected wire");
 169     }
 170     // IMP 0019766
 171     if (aFW->StatusConnected(ShapeExtend_DONE3)) {
 172       // Confused with <prec> but not Analyzer.Precision(), set the same
 173       aFW->FixGapsByRangesMode() = Standard_True;
 174       if (aFW->FixGaps3d()) {
 175         Handle(ShapeExtend_WireData) sbwd = aFW->WireData();
 176         Handle(ShapeFix_Edge) aFe = new ShapeFix_Edge;
 177         for (Standard_Integer iedge = 1; iedge <= sbwd->NbEdges(); iedge++) {
 178           TopoDS_Edge aEdge = TopoDS::Edge(sbwd->Edge(iedge));
 179           aFe->FixVertexTolerance(aEdge);
 180           aFe->FixSameParameter(aEdge);
 181         }
 182       }
 183       else if (aFW->StatusGaps3d(ShapeExtend_FAIL)) {
 184         Standard_ConstructionError::Raise("Wire construction failed: cannot fix 3d gaps");
 185       }
 186     }
 187       aShape = aFW->WireAPIMake();
 188   }
 189   else if (aType == FACE_WIRE) {
 190     Handle(GEOM_Function) aRefBase = aCI.GetBase();
 191     TopoDS_Shape aShapeBase = aRefBase->GetValue();
 192     if (aShapeBase.IsNull()) Standard_NullObject::Raise("Argument Shape is null");
 193     TopoDS_Wire W;
 194     if (aShapeBase.ShapeType() == TopAbs_WIRE) {
 195       W = TopoDS::Wire(aShapeBase);
 196       // check the wire is closed
 197       TopoDS_Vertex aV1, aV2;
 198       TopExp::Vertices(W, aV1, aV2);
 199       if ( !aV1.IsNull() && !aV2.IsNull() && aV1.IsSame(aV2) )
 200         aShapeBase.Closed(true);
 201       else
 202         Standard_NullObject::Raise
 203           ("Shape for face construction is not closed");
 204     }
 205     else if (aShapeBase.ShapeType() == TopAbs_EDGE && aShapeBase.Closed()) {
 206       BRepBuilderAPI_MakeWire MW;
 207       MW.Add(TopoDS::Edge(aShapeBase));
 208       if (!MW.IsDone()) {
 209         Standard_ConstructionError::Raise("Wire construction failed");
 210       }
 211       W = MW;
 212     }
 213     else {
 214       Standard_NullObject::Raise
 215         ("Shape for face construction is neither a wire nor a closed edge");
 216     }
 217     GEOMImpl_Block6Explorer::MakeFace(W, aCI.GetIsPlanar(), aShape);
 218     if (aShape.IsNull()) {
 219       Standard_ConstructionError::Raise("Face construction failed");
 220     }
 221   }
 222   else if (aType == FACE_WIRES) {
 223     // Try to build a face from a set of wires and edges
 224     int ind;
 225
 226     Handle(TColStd_HSequenceOfTransient) aShapes = aCI.GetShapes();
 227     int nbshapes = aShapes->Length();
 228     if (nbshapes < 1) {
 229       Standard_ConstructionError::Raise("No wires or edges given");
 230     }
 231
 232     // 1. Extract all edges from the given arguments
 233     TopTools_MapOfShape aMapEdges;
 234     Handle(TopTools_HSequenceOfShape) aSeqEdgesIn = new TopTools_HSequenceOfShape;
 235
 236     for (ind = 1; ind <= nbshapes; ind++) {
 237       Handle(GEOM_Function) aRefSh_i = Handle(GEOM_Function)::DownCast(aShapes->Value(ind));
 238       TopoDS_Shape aSh_i = aRefSh_i->GetValue();
 239
 240       TopExp_Explorer anExpE_i (aSh_i, TopAbs_EDGE);
 241       for (; anExpE_i.More(); anExpE_i.Next()) {
 242         if (aMapEdges.Add(anExpE_i.Current())) {
 243           aSeqEdgesIn->Append(anExpE_i.Current());
 244         }
 245       }
 246     }
 247
 248     // 2. Connect edges to wires of maximum length
 249     Handle(TopTools_HSequenceOfShape) aSeqWiresOut;
 250     ShapeAnalysis_FreeBounds::ConnectEdgesToWires(aSeqEdgesIn, Precision::Confusion(),
 251                                                   /*shared*/Standard_False, aSeqWiresOut);
 252
 253     // 3. Separate closed wires
 254     Handle(TopTools_HSequenceOfShape) aSeqClosedWires = new TopTools_HSequenceOfShape;
 255     Handle(TopTools_HSequenceOfShape) aSeqOpenWires = new TopTools_HSequenceOfShape;
 256     for (ind = 1; ind <= aSeqWiresOut->Length(); ind++) {
 257       if (aSeqWiresOut->Value(ind).Closed())
 258         aSeqClosedWires->Append(aSeqWiresOut->Value(ind));
 259       else
 260         aSeqOpenWires->Append(aSeqWiresOut->Value(ind));
 261     }
 262
 263     if (aSeqClosedWires->Length() < 1) {
 264       Standard_ConstructionError::Raise
 265         ("There is no closed contour can be built from the given arguments");
 266     }
 267
 268     // 4. Build a face / list of faces from all the obtained closed wires
 269
 270     // 4.a. Basic face
 271     TopoDS_Shape aFFace;
 272     TopoDS_Wire aW1 = TopoDS::Wire(aSeqClosedWires->Value(1));
 273     GEOMImpl_Block6Explorer::MakeFace(aW1, aCI.GetIsPlanar(), aFFace);
 274     if (aFFace.IsNull()) {
 275       Standard_ConstructionError::Raise("Face construction failed");
 276     }
 277
 278     // 4.b. Add other wires
 279     if (aSeqClosedWires->Length() == 1) {
 280       aShape = aFFace;
 281     }
 282     else {
 283       TopoDS_Compound C;
 284       BRep_Builder aBuilder;
 285       aBuilder.MakeCompound(C);
 286       BRepAlgo_FaceRestrictor FR;
 287
 288       TopAbs_Orientation OriF = aFFace.Orientation();
 289       TopoDS_Shape aLocalS = aFFace.Oriented(TopAbs_FORWARD);
 290       FR.Init(TopoDS::Face(aLocalS), Standard_False, Standard_True);
 291
 292       for (ind = 1; ind <= aSeqClosedWires->Length(); ind++) {
 293         TopoDS_Wire aW = TopoDS::Wire(aSeqClosedWires->Value(ind));
 294         FR.Add(aW);
 295       }
 296
 297       FR.Perform();
 298
 299       if (FR.IsDone()) {
 300         int k = 0;
 301         TopoDS_Shape aFace;
 302         for (; FR.More(); FR.Next()) {
 303           aFace = FR.Current().Oriented(OriF);
 304           aBuilder.Add(C, aFace);
 305           k++;
 306         }
 307         if (k == 1) {
 308           aShape = aFace;
 309         } else {
 310           aShape = C;
 311         }
 312       }
 313     }
 314
 315     // 5. Add all open wires to the result
 316     if (aSeqOpenWires->Length() > 0) {
 317       //Standard_ConstructionError::Raise("There are some open wires");
 318       TopoDS_Compound C;
 319       BRep_Builder aBuilder;
 320       if (aSeqClosedWires->Length() == 1) {
 321         aBuilder.MakeCompound(C);
 322         aBuilder.Add(C, aShape);
 323       }
 324       else {
 325         C = TopoDS::Compound(aShape);
 326       }
 327
 328       for (ind = 1; ind <= aSeqOpenWires->Length(); ind++) {
 329         aBuilder.Add(C, aSeqOpenWires->Value(ind));
 330       }
 331
 332       aShape = C;
 333     }
 334   }
 335   else if (aType == SHELL_FACES) {
 336     Handle(TColStd_HSequenceOfTransient) aShapes = aCI.GetShapes();
 337     unsigned int ind, nbshapes = aShapes->Length();
 338
 339     // add faces
 340     BRepBuilderAPI_Sewing aSewing(Precision::Confusion()*10.0);
 341     for (ind = 1; ind <= nbshapes; ind++) {
 342       Handle(GEOM_Function) aRefShape = Handle(GEOM_Function)::DownCast(aShapes->Value(ind));
 343       TopoDS_Shape aShape_i = aRefShape->GetValue();
 344       if (aShape_i.IsNull()) {
 345         Standard_NullObject::Raise("Face for shell construction is null");
 346       }
 347       aSewing.Add(aShape_i);
 348     }
 349
 350     aSewing.Perform();
 351
 352     TopoDS_Shape sh = aSewing.SewedShape();
 353     if( sh.ShapeType()==TopAbs_FACE && nbshapes==1 ) {
 354       // case for creation of shell from one face - PAL12722 (skl 26.06.2006)
 355       TopoDS_Shell ss;
 356       B.MakeShell(ss);
 357       B.Add(ss,sh);
 358       aShape = ss;
 359     }
 360     else {
 361       //TopExp_Explorer exp (aSewing.SewedShape(), TopAbs_SHELL);
 362       TopExp_Explorer exp (sh, TopAbs_SHELL);
 363       Standard_Integer ish = 0;
 364       for (; exp.More(); exp.Next()) {
 365         aShape = exp.Current();
 366         ish++;
 367       }
 368
 369       if (ish != 1)
 370         aShape = aSewing.SewedShape();
 371     }
 372
 373   }
 374   else if (aType == SOLID_SHELL) {
 375     Handle(GEOM_Function) aRefShell = aCI.GetBase();
 376     TopoDS_Shape aShapeShell = aRefShell->GetValue();
 377     if (!aShapeShell.IsNull() && aShapeShell.ShapeType() == TopAbs_COMPOUND) {
 378       TopoDS_Iterator It (aShapeShell, Standard_True, Standard_True);
 379       if (It.More()) aShapeShell = It.Value();
 380     }
 381     if (aShapeShell.IsNull() || aShapeShell.ShapeType() != TopAbs_SHELL) {
 382       Standard_NullObject::Raise("Shape for solid construction is null or not a shell");
 383     }
 384
 385     BRepCheck_Shell chkShell(TopoDS::Shell(aShapeShell));
 386     if (chkShell.Closed() == BRepCheck_NotClosed) return 0;
 387
 388     TopoDS_Solid Sol;
 389     B.MakeSolid(Sol);
 390     B.Add(Sol, aShapeShell);
 391     BRepClass3d_SolidClassifier SC (Sol);
 392     SC.PerformInfinitePoint(Precision::Confusion());
 393     if (SC.State() == TopAbs_IN) {
 394       B.MakeSolid(Sol);
 395       B.Add(Sol, aShapeShell.Reversed());
 396     }
 397
 398     aShape = Sol;
 399
 400   }
 401   else if (aType == SOLID_SHELLS) {
 402     Handle(TColStd_HSequenceOfTransient) aShapes = aCI.GetShapes();
 403     unsigned int ind, nbshapes = aShapes->Length();
 404     Standard_Integer ish = 0;
 405     TopoDS_Solid Sol;
 406     B.MakeSolid(Sol);
 407
 408     // add shapes
 409     for (ind = 1; ind <= nbshapes; ind++) {
 410       Handle(GEOM_Function) aRefShape = Handle(GEOM_Function)::DownCast(aShapes->Value(ind));
 411       TopoDS_Shape aShapeShell = aRefShape->GetValue();
 412       if (aShapeShell.IsNull()) {
 413         Standard_NullObject::Raise("Shell for solid construction is null");
 414       }
 415       if (aShapeShell.ShapeType() == TopAbs_COMPOUND) {
 416         TopoDS_Iterator It (aShapeShell, Standard_True, Standard_True);
 417         if (It.More()) aShapeShell = It.Value();
 418       }
 419       if (aShapeShell.ShapeType() == TopAbs_SHELL) {
 420         B.Add(Sol, aShapeShell);
 421         ish++;
 422       }
 423     }
 424     if (ish == 0) return 0;
 425     BRepClass3d_SolidClassifier SC (Sol);
 426     SC.PerformInfinitePoint(Precision::Confusion());
 427     if (SC.State() == TopAbs_IN)
 428       aShape = Sol.Reversed();
 429     else
 430       aShape = Sol;
 431   }
 432   else if (aType == COMPOUND_SHAPES) {
 433     Handle(TColStd_HSequenceOfTransient) aShapes = aCI.GetShapes();
 434     unsigned int ind, nbshapes = aShapes->Length();
 435
 436     // add shapes
 437     TopoDS_Compound C;
 438     B.MakeCompound(C);
 439     for (ind = 1; ind <= nbshapes; ind++) {
 440       Handle(GEOM_Function) aRefShape = Handle(GEOM_Function)::DownCast(aShapes->Value(ind));
 441       TopoDS_Shape aShape_i = aRefShape->GetValue();
 442       if (aShape_i.IsNull()) {
 443         Standard_NullObject::Raise("Shape for compound construction is null");
 444       }
 445       B.Add(C, aShape_i);
 446     }
 447
 448     aShape = C;
 449
 450   }
 451   else if (aType == REVERSE_ORIENTATION) {
 452     Handle(GEOM_Function) aRefShape = aCI.GetBase();
 453     TopoDS_Shape aShape_i = aRefShape->GetValue();
 454     if (aShape_i.IsNull()) {
 455        Standard_NullObject::Raise("Shape for reverse is null");
 456     }
 457
 458     BRepBuilderAPI_Copy Copy(aShape_i);
 459     if( Copy.IsDone() ) {
 460       TopoDS_Shape tds = Copy.Shape();
 461       if( tds.IsNull() ) {
 462         Standard_ConstructionError::Raise("Orientation aborted : Can not reverse the shape");
 463       }
 464
 465       if( tds.Orientation() == TopAbs_FORWARD)
 466         tds.Orientation(TopAbs_REVERSED);
 467       else
 468         tds.Orientation(TopAbs_FORWARD);
 469
 470       aShape = tds;
 471     }
 472   }
 473   else if (aType == EDGE_WIRE) {
 474     Handle(GEOM_Function) aRefBase = aCI.GetBase();
 475     TopoDS_Shape aWire = aRefBase->GetValue();
 476     Standard_Real LinTol = aCI.GetTolerance();
 477     Standard_Real AngTol = aCI.GetAngularTolerance();
 478     if (aWire.IsNull()) Standard_NullObject::Raise("Argument Wire is null");
 479
 480     TopoDS_Edge ResEdge;
 481
 482     BRepLib::BuildCurves3d(aWire);
 483     Handle(ShapeFix_Shape) Fixer = new ShapeFix_Shape(aWire);
 484     Fixer->SetPrecision(LinTol);
 485     Fixer->SetMaxTolerance(LinTol);
 486     Fixer->Perform();
 487     TopoDS_Wire theWire = TopoDS::Wire(Fixer->Shape());
 488
 489     TColGeom_SequenceOfCurve CurveSeq;
 490     TopTools_SequenceOfShape LocSeq;
 491     TColStd_SequenceOfReal FparSeq;
 492     TColStd_SequenceOfReal LparSeq;
 493     TColStd_SequenceOfReal TolSeq;
 494     GeomAbs_CurveType CurType;
 495     TopoDS_Vertex FirstVertex, LastVertex;
 496
 497     BRepTools_WireExplorer wexp(theWire) ;
 498     for (; wexp.More(); wexp.Next())
 499     {
 500       TopoDS_Edge anEdge = wexp.Current();
 501       Standard_Real fpar, lpar;
 502       TopLoc_Location aLoc;
 503       Handle(Geom_Curve) aCurve = BRep_Tool::Curve(anEdge, aLoc, fpar, lpar);
 504       if (aCurve.IsNull())
 505         continue;
 506
 507       BRepAdaptor_Curve BAcurve(anEdge);
 508       GeomAbs_CurveType aType = BAcurve.GetType();
 509
 510       Handle(Geom_Curve) aBasisCurve = BAcurve.Curve().Curve();
 511
 512       if (aBasisCurve->IsPeriodic())
 513         ElCLib::AdjustPeriodic(aBasisCurve->FirstParameter(), aBasisCurve->LastParameter(),
 514                                Precision::PConfusion(), fpar, lpar);
 515
 516       if (CurveSeq.IsEmpty())
 517       {
 518         CurveSeq.Append(aCurve);
 519         TopoDS_Shape aLocShape;
 520         aLocShape.Location(aLoc);
 521         aLocShape.Orientation(wexp.Orientation());
 522         LocSeq.Append(aLocShape);
 523         FparSeq.Append(fpar);
 524         LparSeq.Append(lpar);
 525         CurType = aType;
 526         FirstVertex = wexp.CurrentVertex();
 527       }
 528       else
 529       {
 530         Standard_Boolean Done = Standard_False;
 531         Standard_Real NewFpar, NewLpar;
 532         GeomAdaptor_Curve GAprevcurve(CurveSeq.Last());
 533         TopoDS_Vertex CurVertex = wexp.CurrentVertex();
 534         TopoDS_Vertex CurFirstVer = TopExp::FirstVertex(anEdge);
 535         TopAbs_Orientation ConnectByOrigin = (CurVertex.IsSame(CurFirstVer))? TopAbs_FORWARD : TopAbs_REVERSED;
 536         if (aCurve == CurveSeq.Last())
 537         {
 538           NewFpar = fpar;
 539           NewLpar = lpar;
 540           if (aBasisCurve->IsPeriodic())
 541           {
 542             if (NewLpar < NewFpar)
 543               NewLpar += aBasisCurve->Period();
 544             if (ConnectByOrigin == TopAbs_FORWARD)
 545               ElCLib::AdjustPeriodic(FparSeq.Last(),
 546                                      FparSeq.Last() + aBasisCurve->Period(),
 547                                      Precision::PConfusion(), NewFpar, NewLpar);
 548             else
 549               ElCLib::AdjustPeriodic(FparSeq.Last() - aBasisCurve->Period(),
 550                                      FparSeq.Last(),
 551                                      Precision::PConfusion(), NewFpar, NewLpar);
 552           }
 553           Done = Standard_True;
 554         }
 555         else if (aType == CurType &&
 556                  aType != GeomAbs_BezierCurve &&
 557                  aType != GeomAbs_BSplineCurve &&
 558                  aType != GeomAbs_OtherCurve)
 559         {
 560           switch (aType)
 561           {
 562           case GeomAbs_Line:
 563             {
 564               gp_Lin aLine    = BAcurve.Line();
 565               gp_Lin PrevLine = GAprevcurve.Line();
 566               if (aLine.Contains(PrevLine.Location(), LinTol) &&
 567                   aLine.Direction().IsParallel(PrevLine.Direction(), AngTol))
 568               {
 569                 gp_Pnt P1 = ElCLib::Value(fpar, aLine);
 570                 gp_Pnt P2 = ElCLib::Value(lpar, aLine);
 571                 NewFpar = ElCLib::Parameter(PrevLine, P1);
 572                 NewLpar = ElCLib::Parameter(PrevLine, P2);
 573                 if (NewLpar < NewFpar)
 574                 {
 575                   Standard_Real MemNewFpar = NewFpar;
 576                   NewFpar = NewLpar;
 577                   NewLpar = MemNewFpar;
 578                   ConnectByOrigin = TopAbs::Reverse(ConnectByOrigin);
 579                 }
 580                 Done = Standard_True;
 581               }
 582               break;
 583             }
 584           case GeomAbs_Circle:
 585             {
 586               gp_Circ aCircle    = BAcurve.Circle();
 587               gp_Circ PrevCircle = GAprevcurve.Circle();
 588               if (aCircle.Location().Distance(PrevCircle.Location()) <= LinTol &&
 589                   Abs(aCircle.Radius() - PrevCircle.Radius()) <= LinTol &&
 590                   aCircle.Axis().IsParallel(PrevCircle.Axis(), AngTol))
 591               {
 592                 if (aCircle.Axis().Direction() * PrevCircle.Axis().Direction() < 0.)
 593                 {
 594                   Standard_Real memfpar = fpar;
 595                   fpar = lpar;
 596                   lpar = memfpar;
 597                   ConnectByOrigin = TopAbs::Reverse(ConnectByOrigin);
 598                 }
 599                 gp_Pnt P1 = ElCLib::Value(fpar, aCircle);
 600                 gp_Pnt P2 = ElCLib::Value(lpar, aCircle);
 601                 NewFpar = ElCLib::Parameter(PrevCircle, P1);
 602                 NewLpar = ElCLib::Parameter(PrevCircle, P2);
 603                 if (NewLpar < NewFpar)
 604                   NewLpar += 2.*PI;
 605                 //Standard_Real MemNewFpar = NewFpar, MemNewLpar =  NewLpar;
 606                 if (ConnectByOrigin == TopAbs_FORWARD)
 607                   ElCLib::AdjustPeriodic(FparSeq.Last(),
 608                                          FparSeq.Last() + 2.*PI,
 609                                          Precision::PConfusion(), NewFpar, NewLpar);
 610                 else
 611                   ElCLib::AdjustPeriodic(FparSeq.Last() - 2.*PI,
 612                                          FparSeq.Last(),
 613                                          Precision::PConfusion(), NewFpar, NewLpar);
 614                 Done = Standard_True;
 615               }
 616               break;
 617             }
 618           case GeomAbs_Ellipse:
 619             {
 620               gp_Elips anEllipse   = BAcurve.Ellipse();
 621               gp_Elips PrevEllipse = GAprevcurve.Ellipse();
 622               if (anEllipse.Focus1().Distance(PrevEllipse.Focus1()) <= LinTol &&
 623                   anEllipse.Focus2().Distance(PrevEllipse.Focus2()) <= LinTol &&
 624                   Abs(anEllipse.MajorRadius() - PrevEllipse.MajorRadius()) <= LinTol &&
 625                   Abs(anEllipse.MinorRadius() - PrevEllipse.MinorRadius()) <= LinTol &&
 626                   anEllipse.Axis().IsParallel(PrevEllipse.Axis(), AngTol))
 627               {
 628                 if (anEllipse.Axis().Direction() * PrevEllipse.Axis().Direction() < 0.)
 629                 {
 630                   Standard_Real memfpar = fpar;
 631                   fpar = lpar;
 632                   lpar = memfpar;
 633                   ConnectByOrigin = TopAbs::Reverse(ConnectByOrigin);
 634                 }
 635                 gp_Pnt P1 = ElCLib::Value(fpar, anEllipse);
 636                 gp_Pnt P2 = ElCLib::Value(lpar, anEllipse);
 637                 NewFpar = ElCLib::Parameter(PrevEllipse, P1);
 638                 NewLpar = ElCLib::Parameter(PrevEllipse, P2);
 639                 if (NewLpar < NewFpar)
 640                   NewLpar += 2.*PI;
 641                 if (ConnectByOrigin == TopAbs_FORWARD)
 642                   ElCLib::AdjustPeriodic(FparSeq.Last(),
 643                                          FparSeq.Last() + 2.*PI,
 644                                          Precision::PConfusion(), NewFpar, NewLpar);
 645                 else
 646                   ElCLib::AdjustPeriodic(FparSeq.Last() - 2.*PI,
 647                                          FparSeq.Last(),
 648                                          Precision::PConfusion(), NewFpar, NewLpar);
 649                 Done = Standard_True;
 650               }
 651               break;
 652             }
 653           case GeomAbs_Hyperbola:
 654             {
 655               gp_Hypr aHypr    = BAcurve.Hyperbola();
 656               gp_Hypr PrevHypr = GAprevcurve.Hyperbola();
 657               if (aHypr.Focus1().Distance(PrevHypr.Focus1()) <= LinTol &&
 658                   aHypr.Focus2().Distance(PrevHypr.Focus2()) <= LinTol &&
 659                   Abs(aHypr.MajorRadius() - PrevHypr.MajorRadius()) <= LinTol &&
 660                   Abs(aHypr.MinorRadius() - PrevHypr.MinorRadius()) <= LinTol &&
 661                   aHypr.Axis().IsParallel(PrevHypr.Axis(), AngTol))
 662               {
 663                 gp_Pnt P1 = ElCLib::Value(fpar, aHypr);
 664                 gp_Pnt P2 = ElCLib::Value(lpar, aHypr);
 665                 NewFpar = ElCLib::Parameter(PrevHypr, P1);
 666                 NewLpar = ElCLib::Parameter(PrevHypr, P2);
 667                 if (NewLpar < NewFpar)
 668                 {
 669                   Standard_Real MemNewFpar = NewFpar;
 670                   NewFpar = NewLpar;
 671                   NewLpar = MemNewFpar;
 672                   ConnectByOrigin = TopAbs::Reverse(ConnectByOrigin);
 673                 }
 674                 Done = Standard_True;
 675               }
 676               break;
 677             }
 678           case GeomAbs_Parabola:
 679             {
 680               gp_Parab aParab    = BAcurve.Parabola();
 681               gp_Parab PrevParab = GAprevcurve.Parabola();
 682               if (aParab.Location().Distance(PrevParab.Location()) <= LinTol &&
 683                   aParab.Focus().Distance(PrevParab.Focus()) <= LinTol &&
 684                   Abs(aParab.Focal() - PrevParab.Focal()) <= LinTol &&
 685                   aParab.Axis().IsParallel(PrevParab.Axis(), AngTol))
 686               {
 687                 gp_Pnt P1 = ElCLib::Value(fpar, aParab);
 688                 gp_Pnt P2 = ElCLib::Value(lpar, aParab);
 689                 NewFpar = ElCLib::Parameter(PrevParab, P1);
 690                 NewLpar = ElCLib::Parameter(PrevParab, P2);
 691                 if (NewLpar < NewFpar)
 692                 {
 693                   Standard_Real MemNewFpar = NewFpar;
 694                   NewFpar = NewLpar;
 695                   NewLpar = MemNewFpar;
 696                   ConnectByOrigin = TopAbs::Reverse(ConnectByOrigin);
 697                 }
 698                 Done = Standard_True;
 699               }
 700               break;
 701             }
 702           } //end of switch (aType)
 703         } // end of else if (aType == CurType && ...
 704         if (Done)
 705         {
 706           if (NewFpar < FparSeq.Last())
 707             FparSeq(FparSeq.Length()) = NewFpar;
 708           else
 709             LparSeq(LparSeq.Length()) = NewLpar;
 710         }
 711         else
 712         {
 713           CurveSeq.Append(aCurve);
 714           TopoDS_Shape aLocShape;
 715           aLocShape.Location(aLoc);
 716           aLocShape.Orientation(wexp.Orientation());
 717           LocSeq.Append(aLocShape);
 718           FparSeq.Append(fpar);
 719           LparSeq.Append(lpar);
 720           TolSeq.Append(BRep_Tool::Tolerance(CurVertex));
 721           CurType = aType;
 722         }
 723       } // end of else (CurveSeq.IsEmpty()) -> not first time
 724     } // end for (; wexp.More(); wexp.Next())
 725
 726     LastVertex = wexp.CurrentVertex();
 727     TolSeq.Append(BRep_Tool::Tolerance(LastVertex));
 728
 729     if (!CurveSeq.IsEmpty())
 730     {
 731       Standard_Integer nb_curve = CurveSeq.Length();   //number of curves
 732       TColGeom_Array1OfBSplineCurve tab(0,nb_curve-1);                    //array of the curves
 733       TColStd_Array1OfReal tabtolvertex(0,nb_curve-1); //(0,nb_curve-2);  //array of the tolerances
 734
 735       Standard_Integer i;
 736
 737       if (nb_curve > 1)
 738       {
 739         for (i = 1; i <= nb_curve; i++)
 740         {
 741           if (CurveSeq(i)->IsInstance(STANDARD_TYPE(Geom_TrimmedCurve)))
 742             CurveSeq(i) = (*((Handle(Geom_TrimmedCurve)*)&(CurveSeq(i))))->BasisCurve();
 743
 744           Handle(Geom_TrimmedCurve) aTrCurve = new Geom_TrimmedCurve(CurveSeq(i), FparSeq(i), LparSeq(i));
 745           tab(i-1) = GeomConvert::CurveToBSplineCurve(aTrCurve);
 746           tab(i-1)->Transform(LocSeq(i).Location().Transformation());
 747           GeomConvert::C0BSplineToC1BSplineCurve(tab(i-1), Precision::Confusion());
 748           if (LocSeq(i).Orientation() == TopAbs_REVERSED)
 749             tab(i-1)->Reverse();
 750
 751           //Temporary
 752           //char* name = new char[100];
 753           //sprintf(name, "c%d", i);
 754           //DrawTrSurf::Set(name, tab(i-1));
 755
 756           if (i > 1)
 757             tabtolvertex(i-2) = TolSeq(i-1);
 758         } // end for (i = 1; i <= nb_curve; i++)
 759         tabtolvertex(nb_curve-1) = TolSeq(TolSeq.Length());
 760
 761         Standard_Boolean closed_flag = Standard_False;
 762         Standard_Real closed_tolerance = 0.;
 763         if (FirstVertex.IsSame(LastVertex) &&
 764             GeomLProp::Continuity(tab(0), tab(nb_curve-1),
 765                                   tab(0)->FirstParameter(),
 766                                   tab(nb_curve-1)->LastParameter(),
 767                                   Standard_False, Standard_False, LinTol, AngTol) >= GeomAbs_G1)
 768         {
 769           closed_flag = Standard_True ;
 770           closed_tolerance = BRep_Tool::Tolerance(FirstVertex);
 771         }
 772
 773         Handle(TColGeom_HArray1OfBSplineCurve)  concatcurve;     //array of the concatenated curves
 774         Handle(TColStd_HArray1OfInteger)        ArrayOfIndices;  //array of the remining Vertex
 775         GeomConvert::ConcatC1(tab,
 776                               tabtolvertex,
 777                               ArrayOfIndices,
 778                               concatcurve,
 779                               closed_flag,
 780                               closed_tolerance);   //C1 concatenation
 781
 782         if (concatcurve->Length() > 1)
 783         {
 784           GeomConvert_CompCurveToBSplineCurve Concat(concatcurve->Value(concatcurve->Lower()));
 785
 786           for (i = concatcurve->Lower()+1; i <= concatcurve->Upper(); i++)
 787             Concat.Add( concatcurve->Value(i), LinTol, Standard_True );
 788
 789           concatcurve->SetValue(concatcurve->Lower(), Concat.BSplineCurve());
 790         }
 791
 792         ResEdge = BRepLib_MakeEdge(concatcurve->Value(concatcurve->Lower()),
 793                                    FirstVertex, LastVertex);
 794       }
 795       else
 796       {
 797         if (CurveSeq(1)->IsInstance(STANDARD_TYPE(Geom_TrimmedCurve)))
 798           CurveSeq(1) = (*((Handle(Geom_TrimmedCurve)*)&(CurveSeq(i))))->BasisCurve();
 799
 800         CurveSeq(1)->Transform(LocSeq(1).Location().Transformation());
 801         ResEdge = BRepLib_MakeEdge(CurveSeq(1),
 802                                    FirstVertex, LastVertex,
 803                                    FparSeq(1), LparSeq(1));
 804       }
 805     }
 806
 807     aShape = ResEdge;
 808   }
 809   else if (aType == EDGE_CURVE_LENGTH) {
 810     GEOMImpl_IVector aVI (aFunction);
 811
 812     // RefCurve
 813     Handle(GEOM_Function) aRefCurve = aVI.GetPoint1();
 814     if (aRefCurve.IsNull()) Standard_NullObject::Raise("Argument Curve is null");
 815     TopoDS_Shape aRefShape1 = aRefCurve->GetValue();
 816     if (aRefShape1.ShapeType() != TopAbs_EDGE) {
 817       Standard_TypeMismatch::Raise
 818         ("Edge On Curve creation aborted : curve shape is not an edge");
 819     }
 820     TopoDS_Edge aRefEdge = TopoDS::Edge(aRefShape1);
 821     TopoDS_Vertex V1, V2;
 822     TopExp::Vertices(aRefEdge, V1, V2, Standard_True);
 823
 824     // RefPoint
 825     TopoDS_Vertex aRefVertex;
 826     Handle(GEOM_Function) aRefPoint = aVI.GetPoint2();
 827     if (aRefPoint.IsNull()) {
 828       aRefVertex = V1;
 829     }
 830     else {
 831       TopoDS_Shape aRefShape2 = aRefPoint->GetValue();
 832       if (aRefShape2.ShapeType() != TopAbs_VERTEX) {
 833         Standard_TypeMismatch::Raise
 834           ("Edge On Curve creation aborted : start point shape is not a vertex");
 835       }
 836       aRefVertex = TopoDS::Vertex(aRefShape2);
 837     }
 838     gp_Pnt aRefPnt = BRep_Tool::Pnt(aRefVertex);
 839
 840     // Length
 841     Standard_Real aLength = aVI.GetParameter();
 842     //Standard_Real aCurveLength = IntTools::Length(aRefEdge);
 843     //if (aLength > aCurveLength) {
 844     //  Standard_ConstructionError::Raise
 845     //    ("Edge On Curve creation aborted : given length is greater than edges length");
 846     //}
 847     if (fabs(aLength) < Precision::Confusion()) {
 848       Standard_ConstructionError::Raise
 849         ("Edge On Curve creation aborted : given length is smaller than Precision::Confusion()");
 850     }
 851
 852     // Check orientation
 853     Standard_Real UFirst, ULast;
 854     Handle(Geom_Curve) EdgeCurve = BRep_Tool::Curve(aRefEdge, UFirst, ULast);
 855     Handle(Geom_Curve) ReOrientedCurve = EdgeCurve;
 856
 857     Standard_Real dU = ULast - UFirst;
 858     Standard_Real par1 = UFirst + 0.1 * dU;
 859     Standard_Real par2 = ULast  - 0.1 * dU;
 860
 861     gp_Pnt P1 = EdgeCurve->Value(par1);
 862     gp_Pnt P2 = EdgeCurve->Value(par2);
 863
 864     if (aRefPnt.SquareDistance(P2) < aRefPnt.SquareDistance(P1)) {
 865       ReOrientedCurve = EdgeCurve->Reversed();
 866       UFirst = EdgeCurve->ReversedParameter(ULast);
 867     }
 868
 869     // Get the point by length
 870     GeomAdaptor_Curve AdapCurve = GeomAdaptor_Curve(ReOrientedCurve);
 871     GCPnts_AbscissaPoint anAbsPnt (AdapCurve, aLength, UFirst);
 872     Standard_Real aParam = anAbsPnt.Parameter();
 873
 874     if (AdapCurve.IsClosed() && aLength < 0.0) {
 875       Standard_Real aTmp = aParam;
 876       aParam = UFirst;
 877       UFirst = aTmp;
 878     }
 879
 880     BRepBuilderAPI_MakeEdge aME (ReOrientedCurve, UFirst, aParam);
 881     if (aME.IsDone())
 882       aShape = aME.Shape();
 883   }
 884   else {
 885   }
 886
 887   if (aShape.IsNull()) return 0;
 888
 889   // Check shape validity
 890   BRepCheck_Analyzer ana (aShape, false);
 891   if (!ana.IsValid()) {
 892     //Standard_ConstructionError::Raise("Algorithm have produced an invalid shape result");
 893   }
 894
 895   aFunction->SetValue(aShape);
 896
 897   log.SetTouched(Label());
 898
 899   return 1;
 900 }
 901
 902
 903 //=======================================================================
 904 //function :  GEOMImpl_ShapeDriver_Type_
 905 //purpose  :
 906 //=======================================================================
 907 Standard_EXPORT Handle_Standard_Type& GEOMImpl_ShapeDriver_Type_()
 908 {
 909
 910   static Handle_Standard_Type aType1 = STANDARD_TYPE(TFunction_Driver);
 911   if ( aType1.IsNull()) aType1 = STANDARD_TYPE(TFunction_Driver);
 912   static Handle_Standard_Type aType2 = STANDARD_TYPE(MMgt_TShared);
 913   if ( aType2.IsNull()) aType2 = STANDARD_TYPE(MMgt_TShared);
 914   static Handle_Standard_Type aType3 = STANDARD_TYPE(Standard_Transient);
 915   if ( aType3.IsNull()) aType3 = STANDARD_TYPE(Standard_Transient);
 916
 917
 918   static Handle_Standard_Transient _Ancestors[]= {aType1,aType2,aType3,NULL};
 919   static Handle_Standard_Type _aType = new Standard_Type("GEOMImpl_ShapeDriver",
 920                                                          sizeof(GEOMImpl_ShapeDriver),
 921                                                          1,
 922                                                          (Standard_Address)_Ancestors,
 923                                                          (Standard_Address)NULL);
 924
 925   return _aType;
 926 }
 927
 928 //=======================================================================
 929 //function : DownCast
 930 //purpose  :
 931 //=======================================================================
 932 const Handle(GEOMImpl_ShapeDriver) Handle(GEOMImpl_ShapeDriver)::DownCast(const Handle(Standard_Transient)& AnObject)
 933 {
 934   Handle(GEOMImpl_ShapeDriver) _anOtherObject;
 935
 936   if (!AnObject.IsNull()) {
 937      if (AnObject->IsKind(STANDARD_TYPE(GEOMImpl_ShapeDriver))) {
 938        _anOtherObject = Handle(GEOMImpl_ShapeDriver)((Handle(GEOMImpl_ShapeDriver)&)AnObject);
 939      }
 940   }
 941
 942   return _anOtherObject;
 943 }