src/StdSelect/StdSelect_BRepSelectionTool.cxx

   1 // Created on: 1995-03-14
   2 // Created by: Robert COUBLANC
   3 // Copyright (c) 1995-1999 Matra Datavision
   4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
   5 //
   6 // This file is part of Open CASCADE Technology software library.
   7 //
   8 // This library is free software; you can redistribute it and/or modify it under
   9 // the terms of the GNU Lesser General Public License version 2.1 as published
  10 // by the Free Software Foundation, with special exception defined in the file
  11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
  12 // distribution for complete text of the license and disclaimer of any warranty.
  13 //
  14 // Alternatively, this file may be used under the terms of Open CASCADE
  15 // commercial license or contractual agreement.
  16
  17 #include <StdSelect_BRepSelectionTool.hxx>
  18
  19 #include <Bnd_Box.hxx>
  20 #include <BRep_Tool.hxx>
  21 #include <BRepAdaptor_Curve.hxx>
  22 #include <BRepAdaptor_Surface.hxx>
  23 #include <BRepBndLib.hxx>
  24 #include <BRepMesh_IncrementalMesh.hxx>
  25 #include <BRepTools.hxx>
  26 #include <BRepTools_WireExplorer.hxx>
  27 #include <GCPnts_TangentialDeflection.hxx>
  28 #include <Geom_Circle.hxx>
  29 #include <GeomAbs_SurfaceType.hxx>
  30 #include <GeomAdaptor_Curve.hxx>
  31 #include <gp_Circ.hxx>
  32 #include <Poly_Array1OfTriangle.hxx>
  33 #include <Poly_Polygon3D.hxx>
  34 #include <Poly_PolygonOnTriangulation.hxx>
  35 #include <Poly_Triangulation.hxx>
  36 #include <Precision.hxx>
  37 #include <Select3D_SensitiveBox.hxx>
  38 #include <Select3D_SensitiveCircle.hxx>
  39 #include <Select3D_SensitiveCurve.hxx>
  40 #include <Select3D_SensitiveEntity.hxx>
  41 #include <Select3D_SensitiveFace.hxx>
  42 #include <Select3D_SensitiveGroup.hxx>
  43 #include <Select3D_SensitivePoint.hxx>
  44 #include <Select3D_SensitiveSegment.hxx>
  45 #include <Select3D_SensitiveTriangle.hxx>
  46 #include <Select3D_SensitiveTriangulation.hxx>
  47 #include <Select3D_SensitiveWire.hxx>
  48 #include <Select3D_TypeOfSensitivity.hxx>
  49 #include <SelectMgr_EntityOwner.hxx>
  50 #include <SelectMgr_SelectableObject.hxx>
  51 #include <SelectMgr_Selection.hxx>
  52 #include <Standard_ErrorHandler.hxx>
  53 #include <Standard_NullObject.hxx>
  54 #include <StdSelect_BRepOwner.hxx>
  55 #include <TColgp_HArray1OfPnt.hxx>
  56 #include <TColgp_SequenceOfPnt.hxx>
  57 #include <TColStd_Array1OfReal.hxx>
  58 #include <TopExp.hxx>
  59 #include <TopExp_Explorer.hxx>
  60 #include <TopoDS.hxx>
  61 #include <TopoDS_Face.hxx>
  62 #include <TopoDS_Shape.hxx>
  63 #include <TopoDS_Wire.hxx>
  64 #include <TopTools_IndexedMapOfShape.hxx>
  65
  66 #define BVH_PRIMITIVE_LIMIT 800000
  67
  68 //==================================================
  69 // function: PreBuildBVH
  70 // purpose : Pre-builds BVH tree for heavyweight
  71 //           sensitive entities with sub-elements
  72 //           amount more than BVH_PRIMITIVE_LIMIT
  73 //==================================================
  74 void StdSelect_BRepSelectionTool::PreBuildBVH (const Handle(SelectMgr_Selection)& theSelection)
  75 {
  76   for (theSelection->Init(); theSelection->More(); theSelection->Next())
  77   {
  78     const Handle(SelectBasics_SensitiveEntity)& aSensitive = theSelection->Sensitive()->BaseSensitive();
  79     if (aSensitive->NbSubElements() >= BVH_PRIMITIVE_LIMIT)
  80     {
  81       aSensitive->BVH();
  82     }
  83
  84     if (aSensitive->IsInstance ("Select3D_SensitiveGroup"))
  85     {
  86       Handle(Select3D_SensitiveGroup) aGroup (Handle(Select3D_SensitiveGroup)::DownCast (aSensitive));
  87       const Select3D_EntitySequence& aSubEntities = aGroup->GetEntities();
  88       for (Select3D_EntitySequenceIter aSubEntitiesIter (aSubEntities); aSubEntitiesIter.More(); aSubEntitiesIter.Next())
  89       {
  90         const Handle(Select3D_SensitiveEntity)& aSubEntity = aSubEntitiesIter.Value();
  91         if (aSubEntity->NbSubElements() >= BVH_PRIMITIVE_LIMIT)
  92         {
  93           aSubEntity->BVH();
  94         }
  95       }
  96     }
  97   }
  98 }
  99
 100 //==================================================
 101 // Function: Load
 102 // Purpose :
 103 //==================================================
 104 void StdSelect_BRepSelectionTool::Load (const Handle(SelectMgr_Selection)& theSelection,
 105                                         const TopoDS_Shape& theShape,
 106                                         const TopAbs_ShapeEnum theType,
 107                                         const Standard_Real theDeflection,
 108                                         const Standard_Real theDeviationAngle,
 109                                         const Standard_Boolean isAutoTriangulation,
 110                                         const Standard_Integer thePriority,
 111                                         const Standard_Integer theNbPOnEdge,
 112                                         const Standard_Real theMaxParam)
 113 {
 114   Standard_Integer aPriority = (thePriority == -1) ? GetStandardPriority (theShape, theType) : thePriority;
 115
 116   if( isAutoTriangulation && !BRepTools::Triangulation (theShape, Precision::Infinite()) )
 117   {
 118     BRepMesh_IncrementalMesh aMesher(theShape, theDeflection, Standard_False, theDeviationAngle);
 119   }
 120
 121   Handle(StdSelect_BRepOwner) aBrepOwner;
 122   switch (theType)
 123   {
 124     case TopAbs_VERTEX:
 125     case TopAbs_EDGE:
 126     case TopAbs_WIRE:
 127     case TopAbs_FACE:
 128     case TopAbs_SHELL:
 129     case TopAbs_SOLID:
 130     case TopAbs_COMPSOLID:
 131     {
 132       TopTools_IndexedMapOfShape aSubShapes;
 133       TopExp::MapShapes (theShape, theType, aSubShapes);
 134
 135       Standard_Boolean isComesFromDecomposition = !((aSubShapes.Extent() == 1) && (theShape == aSubShapes (1)));
 136       for (Standard_Integer aShIndex = 1; aShIndex <= aSubShapes.Extent(); ++aShIndex)
 137       {
 138         const TopoDS_Shape& aSubShape = aSubShapes (aShIndex);
 139         aBrepOwner = new StdSelect_BRepOwner (aSubShape, aPriority, isComesFromDecomposition);
 140         ComputeSensitive (aSubShape, aBrepOwner,
 141                           theSelection,
 142                           theDeflection,
 143                           theDeviationAngle,
 144                           theNbPOnEdge,
 145                           theMaxParam,
 146                           isAutoTriangulation);
 147       }
 148       break;
 149     }
 150     default:
 151     {
 152       aBrepOwner = new StdSelect_BRepOwner (theShape, aPriority);
 153       ComputeSensitive (theShape, aBrepOwner,
 154                         theSelection,
 155                         theDeflection,
 156                         theDeviationAngle,
 157                         theNbPOnEdge,
 158                         theMaxParam,
 159                         isAutoTriangulation);
 160     }
 161   }
 162 }
 163
 164 //==================================================
 165 // Function: Load
 166 // Purpose :
 167 //==================================================
 168 void StdSelect_BRepSelectionTool::Load (const Handle(SelectMgr_Selection)& theSelection,
 169                                         const Handle(SelectMgr_SelectableObject)& theSelectableObj,
 170                                         const TopoDS_Shape& theShape,
 171                                         const TopAbs_ShapeEnum theType,
 172                                         const Standard_Real theDeflection,
 173                                         const Standard_Real theDeviationAngle,
 174                                         const Standard_Boolean isAutoTriangulation,
 175                                         const Standard_Integer thePriority,
 176                                         const Standard_Integer theNbPOnEdge,
 177                                         const Standard_Real theMaxParam)
 178 {
 179   Load (theSelection,
 180         theShape,
 181         theType,
 182         theDeflection,
 183         theDeviationAngle,
 184         isAutoTriangulation,
 185         thePriority,
 186         theNbPOnEdge,
 187         theMaxParam);
 188
 189   // loading of selectables...
 190   for (theSelection->Init(); theSelection->More(); theSelection->Next())
 191   {
 192     Handle(SelectMgr_EntityOwner) anOwner
 193       = Handle(SelectMgr_EntityOwner)::DownCast (theSelection->Sensitive()->BaseSensitive()->OwnerId());
 194     anOwner->Set (theSelectableObj);
 195   }
 196
 197   PreBuildBVH (theSelection);
 198 }
 199
 200 //==================================================
 201 // Function: ComputeSensitive
 202 // Purpose :
 203 //==================================================
 204 void StdSelect_BRepSelectionTool::ComputeSensitive (const TopoDS_Shape& theShape,
 205                                                     const Handle(SelectMgr_EntityOwner)& theOwner,
 206                                                     const Handle(SelectMgr_Selection)& theSelection,
 207                                                     const Standard_Real theDeflection,
 208                                                     const Standard_Real theDeviationAngle,
 209                                                     const Standard_Integer theNbPOnEdge,
 210                                                     const Standard_Real theMaxParam,
 211                                                     const Standard_Boolean isAutoTriangulation)
 212 {
 213   switch (theShape.ShapeType())
 214   {
 215     case TopAbs_VERTEX:
 216     {
 217       theSelection->Add (new Select3D_SensitivePoint
 218                          (theOwner, BRep_Tool::Pnt (TopoDS::Vertex (theShape))));
 219       break;
 220     }
 221     case TopAbs_EDGE:
 222     {
 223       Handle(Select3D_SensitiveEntity) aSensitive;
 224       GetEdgeSensitive (theShape, theOwner, theSelection,
 225                         theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam,
 226                         aSensitive);
 227       if (!aSensitive.IsNull())
 228       {
 229         theSelection->Add (aSensitive);
 230       }
 231       break;
 232     }
 233     case TopAbs_WIRE:
 234     {
 235       BRepTools_WireExplorer aWireExp (TopoDS::Wire (theShape));
 236       Handle (Select3D_SensitiveEntity) aSensitive;
 237       Handle (Select3D_SensitiveWire) aWireSensitive = new Select3D_SensitiveWire (theOwner);
 238       theSelection->Add (aWireSensitive);
 239       while (aWireExp.More())
 240       {
 241         GetEdgeSensitive (aWireExp.Current(), theOwner, theSelection,
 242                           theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam,
 243                           aSensitive);
 244         if (!aSensitive.IsNull())
 245         {
 246           aWireSensitive->Add (aSensitive);
 247         }
 248         aWireExp.Next();
 249       }
 250       break;
 251     }
 252     case TopAbs_FACE:
 253     {
 254       const TopoDS_Face& aFace = TopoDS::Face (theShape);
 255       Select3D_EntitySequence aSensitiveList;
 256       GetSensitiveForFace (aFace, theOwner,
 257                            aSensitiveList,
 258                            isAutoTriangulation, theNbPOnEdge, theMaxParam);
 259       for (Select3D_EntitySequenceIter aSensIter (aSensitiveList);
 260            aSensIter.More(); aSensIter.Next())
 261       {
 262         theSelection->Add (aSensIter.Value());
 263       }
 264       break;
 265     }
 266     case TopAbs_SHELL:
 267     case TopAbs_SOLID:
 268     case TopAbs_COMPSOLID:
 269     {
 270       TopTools_IndexedMapOfShape aSubfacesMap;
 271       TopExp::MapShapes (theShape, TopAbs_FACE, aSubfacesMap);
 272       for (Standard_Integer aShIndex = 1; aShIndex <= aSubfacesMap.Extent(); ++aShIndex)
 273       {
 274         ComputeSensitive (aSubfacesMap (aShIndex), theOwner,
 275                           theSelection,
 276                           theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam, isAutoTriangulation);
 277       }
 278       break;
 279     }
 280     case TopAbs_COMPOUND:
 281     default:
 282     {
 283       TopExp_Explorer anExp;
 284       // sub-vertices
 285       for (anExp.Init (theShape, TopAbs_VERTEX, TopAbs_EDGE); anExp.More(); anExp.Next())
 286       {
 287         ComputeSensitive (anExp.Current(), theOwner,
 288                           theSelection,
 289                           theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam, isAutoTriangulation);
 290       }
 291       // sub-edges
 292       for (anExp.Init (theShape, TopAbs_EDGE, TopAbs_FACE); anExp.More(); anExp.Next())
 293       {
 294         ComputeSensitive (anExp.Current(), theOwner,
 295                           theSelection,
 296                           theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam, isAutoTriangulation);
 297       }
 298       // sub-wires
 299       for (anExp.Init (theShape, TopAbs_WIRE, TopAbs_FACE); anExp.More(); anExp.Next())
 300       {
 301         ComputeSensitive (anExp.Current(), theOwner,
 302                           theSelection,
 303                           theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam, isAutoTriangulation);
 304       }
 305
 306       // sub-faces
 307       TopTools_IndexedMapOfShape aSubfacesMap;
 308       TopExp::MapShapes (theShape, TopAbs_FACE, aSubfacesMap);
 309       for (Standard_Integer aShIndex = 1; aShIndex <= aSubfacesMap.Extent(); ++aShIndex)
 310       {
 311         ComputeSensitive (aSubfacesMap (aShIndex), theOwner,
 312                           theSelection,
 313                           theDeflection, theDeviationAngle, theNbPOnEdge, theMaxParam, isAutoTriangulation);
 314       }
 315     }
 316   }
 317 }
 318
 319 //==================================================
 320 // Function: GetPointsFromPolygon
 321 // Purpose :
 322 //==================================================
 323 static Handle(TColgp_HArray1OfPnt) GetPointsFromPolygon (const TopoDS_Edge& theEdge)
 324 {
 325   Handle(TColgp_HArray1OfPnt) aResultPoints;
 326
 327   TopLoc_Location aLocation;
 328   Handle(Poly_Polygon3D) aPolygon = BRep_Tool::Polygon3D (theEdge, aLocation);
 329   if (!aPolygon.IsNull())
 330   {
 331     const TColgp_Array1OfPnt& aNodes = aPolygon->Nodes();
 332     aResultPoints = new TColgp_HArray1OfPnt (1, aNodes.Length());
 333     if (aLocation.IsIdentity())
 334     {
 335       for (Standard_Integer aNodeId (aNodes.Lower()), aPntId (1); aNodeId <= aNodes.Upper(); ++aNodeId, ++aPntId)
 336       {
 337         aResultPoints->SetValue (aPntId, aNodes.Value (aNodeId));
 338       }
 339     }
 340     else
 341     {
 342       for (Standard_Integer aNodeId (aNodes.Lower()), aPntId (1); aNodeId <= aNodes.Upper(); ++aNodeId, ++aPntId)
 343       {
 344         aResultPoints->SetValue (aPntId, aNodes.Value (aNodeId).Transformed (aLocation));
 345       }
 346     }
 347     return aResultPoints;
 348   }
 349
 350   Handle(Poly_Triangulation) aTriangulation;
 351   Handle(Poly_PolygonOnTriangulation) anHIndices;
 352   BRep_Tool::PolygonOnTriangulation (theEdge, anHIndices, aTriangulation, aLocation);
 353   if (!anHIndices.IsNull())
 354   {
 355     const TColStd_Array1OfInteger& anIndices = anHIndices->Nodes();
 356     const TColgp_Array1OfPnt& aNodes = aTriangulation->Nodes();
 357
 358     aResultPoints = new TColgp_HArray1OfPnt (1, anIndices.Length());
 359
 360     if (aLocation.IsIdentity())
 361     {
 362       for (Standard_Integer anIndex (anIndices.Lower()), aPntId (1); anIndex <= anIndices.Upper(); ++anIndex, ++aPntId)
 363       {
 364         aResultPoints->SetValue (aPntId, aNodes (anIndices (anIndex)));
 365       }
 366     }
 367     else
 368     {
 369       for (Standard_Integer anIndex (anIndices.Lower()), aPntId (1); anIndex <= anIndices.Upper(); ++anIndex, ++aPntId)
 370       {
 371         aResultPoints->SetValue (aPntId, aNodes (anIndices (anIndex)).Transformed (aLocation));
 372       }
 373     }
 374     return aResultPoints;
 375   }
 376   return aResultPoints;
 377 }
 378
 379 //==================================================
 380 // Function: FindLimits
 381 // Purpose :
 382 //==================================================
 383 static Standard_Boolean FindLimits (const Adaptor3d_Curve& theCurve,
 384                                     const Standard_Real    theLimit,
 385                                           Standard_Real&   theFirst,
 386                                           Standard_Real&   theLast)
 387 {
 388   theFirst = theCurve.FirstParameter();
 389   theLast  = theCurve.LastParameter();
 390   Standard_Boolean isFirstInf = Precision::IsNegativeInfinite (theFirst);
 391   Standard_Boolean isLastInf  = Precision::IsPositiveInfinite (theLast);
 392   if (isFirstInf || isLastInf)
 393   {
 394     gp_Pnt aPnt1, aPnt2;
 395     Standard_Real aDelta = 1.0;
 396     Standard_Integer anIterCount = 0;
 397     if (isFirstInf && isLastInf)
 398     {
 399       do {
 400         if (anIterCount++ >= 100000) return Standard_False;
 401         aDelta *= 2.0;
 402         theFirst = - aDelta;
 403         theLast  =   aDelta;
 404         theCurve.D0 (theFirst, aPnt1);
 405         theCurve.D0 (theLast,  aPnt2);
 406       } while (aPnt1.Distance (aPnt2) < theLimit);
 407     }
 408     else if (isFirstInf)
 409     {
 410       theCurve.D0 (theLast, aPnt2);
 411       do {
 412         if (anIterCount++ >= 100000) return Standard_False;
 413         aDelta *= 2.0;
 414         theFirst = theLast - aDelta;
 415         theCurve.D0 (theFirst, aPnt1);
 416       } while (aPnt1.Distance (aPnt2) < theLimit);
 417     }
 418     else if (isLastInf)
 419     {
 420       theCurve.D0 (theFirst, aPnt1);
 421       do {
 422         if (anIterCount++ >= 100000) return Standard_False;
 423         aDelta *= 2.0;
 424         theLast = theFirst + aDelta;
 425         theCurve.D0 (theLast, aPnt2);
 426       } while (aPnt1.Distance (aPnt2) < theLimit);
 427     }
 428   }
 429   return Standard_True;
 430 }
 431
 432 //=====================================================
 433 // Function : GetEdgeSensitive
 434 // Purpose  :
 435 //=====================================================
 436 void StdSelect_BRepSelectionTool::GetEdgeSensitive (const TopoDS_Shape& theShape,
 437                                                     const Handle(SelectMgr_EntityOwner)& theOwner,
 438                                                     const Handle(SelectMgr_Selection)& theSelection,
 439                                                     const Standard_Real theDeflection,
 440                                                     const Standard_Real theDeviationAngle,
 441                                                     const Standard_Integer theNbPOnEdge,
 442                                                     const Standard_Real theMaxParam,
 443                                                     Handle(Select3D_SensitiveEntity)& theSensitive)
 444 {
 445   const TopoDS_Edge& anEdge = TopoDS::Edge (theShape);
 446   BRepAdaptor_Curve cu3d;
 447   try {
 448     OCC_CATCH_SIGNALS
 449     cu3d.Initialize (anEdge);
 450   } catch (Standard_NullObject) {
 451     return;
 452   }
 453
 454   // try to get points from existing polygons
 455   Handle(TColgp_HArray1OfPnt) aPoints = GetPointsFromPolygon (anEdge);
 456   if (!aPoints.IsNull() && aPoints->Length() > 0)
 457   {
 458     theSensitive = new Select3D_SensitiveCurve (theOwner, aPoints);
 459     return;
 460   }
 461
 462   Standard_Real aParamFirst = cu3d.FirstParameter();
 463   Standard_Real aParamLast  = cu3d.LastParameter();
 464   switch (cu3d.GetType())
 465   {
 466     case GeomAbs_Line:
 467     {
 468       BRep_Tool::Range (anEdge, aParamFirst, aParamLast);
 469       theSensitive = new Select3D_SensitiveSegment (theOwner,
 470                                                     cu3d.Value (aParamFirst),
 471                                                     cu3d.Value (aParamLast));
 472       break;
 473     }
 474     case GeomAbs_Circle:
 475     {
 476       Handle (Geom_Circle) aCircle = new Geom_Circle (cu3d.Circle());
 477       if (aCircle->Radius() <= Precision::Confusion())
 478       {
 479         theSelection->Add (new Select3D_SensitivePoint (theOwner, aCircle->Location()));
 480       }
 481       else
 482       {
 483         theSensitive = new Select3D_SensitiveCircle (theOwner, aCircle,
 484                                                      aParamFirst, aParamLast, Standard_False, 16);
 485       }
 486       break;
 487     }
 488     default:
 489     {
 490       // reproduce drawing behaviour
 491       // TODO: remove copy-paste from StdPrs_Curve and some others...
 492       if (FindLimits (cu3d, theMaxParam, aParamFirst, aParamLast))
 493       {
 494         Standard_Integer aNbIntervals = cu3d.NbIntervals (GeomAbs_C1);
 495         TColStd_Array1OfReal anIntervals (1, aNbIntervals + 1);
 496         cu3d.Intervals (anIntervals, GeomAbs_C1);
 497         Standard_Real aV1, aV2;
 498         Standard_Integer aNumberOfPoints;
 499         TColgp_SequenceOfPnt aPointsSeq;
 500         for (Standard_Integer anIntervalId = 1; anIntervalId <= aNbIntervals; ++anIntervalId)
 501         {
 502           aV1 = anIntervals (anIntervalId);
 503           aV2 = anIntervals (anIntervalId + 1);
 504           if (aV2 > aParamFirst && aV1 < aParamLast)
 505           {
 506             aV1 = Max (aV1, aParamFirst);
 507             aV2 = Min (aV2, aParamLast);
 508
 509             GCPnts_TangentialDeflection anAlgo (cu3d, aV1, aV2, theDeviationAngle, theDeflection);
 510             aNumberOfPoints = anAlgo.NbPoints();
 511
 512             for (Standard_Integer aPntId = 1; aPntId < aNumberOfPoints; ++aPntId)
 513             {
 514               aPointsSeq.Append (anAlgo.Value (aPntId));
 515             }
 516             if (aNumberOfPoints > 0 && anIntervalId == aNbIntervals)
 517             {
 518               aPointsSeq.Append (anAlgo.Value (aNumberOfPoints));
 519             }
 520           }
 521         }
 522
 523         aPoints = new TColgp_HArray1OfPnt (1, aPointsSeq.Length());
 524         for (Standard_Integer aPntId = 1; aPntId <= aPointsSeq.Length(); ++aPntId)
 525         {
 526           aPoints->SetValue (aPntId, aPointsSeq.Value (aPntId));
 527         }
 528         theSensitive = new Select3D_SensitiveCurve (theOwner, aPoints);
 529         break;
 530       }
 531
 532       // simple subdivisions
 533       Standard_Integer nbintervals = 1;
 534       if (cu3d.GetType() == GeomAbs_BSplineCurve)
 535       {
 536         nbintervals = cu3d.NbKnots() - 1;
 537         nbintervals = Max (1, nbintervals / 3);
 538       }
 539
 540       Standard_Real aParam;
 541       Standard_Integer aPntNb = Max (2, theNbPOnEdge * nbintervals);
 542       Standard_Real aParamDelta = (aParamLast - aParamFirst) / (aPntNb - 1);
 543       Handle(TColgp_HArray1OfPnt) aPointArray = new TColgp_HArray1OfPnt (1, aPntNb);
 544       for (Standard_Integer aPntId = 1; aPntId <= aPntNb; ++aPntId)
 545       {
 546         aParam = aParamFirst + aParamDelta * (aPntId - 1);
 547         aPointArray->SetValue (aPntId, cu3d.Value (aParam));
 548       }
 549       theSensitive = new Select3D_SensitiveCurve (theOwner, aPointArray);
 550     }
 551     break;
 552   }
 553 }
 554
 555 //=======================================================================
 556 //function : GetSensitiveEntityForFace
 557 //purpose  :
 558 //=======================================================================
 559 Standard_Boolean StdSelect_BRepSelectionTool::GetSensitiveForFace (const TopoDS_Face& theFace,
 560                                                                    const Handle(SelectMgr_EntityOwner)& theOwner,
 561                                                                    Select3D_EntitySequence& theSensitiveList,
 562                                                                    const Standard_Boolean /*theAutoTriangulation*/,
 563                                                                    const Standard_Integer NbPOnEdge,
 564                                                                    const Standard_Real    theMaxParam,
 565                                                                    const Standard_Boolean theInteriorFlag)
 566 {
 567   // check if there is triangulation of the face...
 568   TopLoc_Location aLoc;
 569   Handle(Poly_Triangulation) aTriangulation = BRep_Tool::Triangulation (theFace, aLoc);
 570
 571   if (!aTriangulation.IsNull())
 572   {
 573     Handle(Select3D_SensitiveTriangulation) STG = new Select3D_SensitiveTriangulation (theOwner, aTriangulation, aLoc, theInteriorFlag);
 574     theSensitiveList.Append (STG);
 575     return Standard_True;
 576   }
 577
 578   // for faces with triangulation bugs or without autotriangulation ....
 579   // very ugly and should not even exist ...
 580   BRepAdaptor_Surface BS;
 581   BS.Initialize (theFace);
 582
 583   Standard_Real FirstU = BS.FirstUParameter() <= -Precision::Infinite() ? -theMaxParam : BS.FirstUParameter();
 584   Standard_Real LastU  = BS.LastUParameter()  >=  Precision::Infinite() ?  theMaxParam : BS.LastUParameter();
 585   Standard_Real FirstV = BS.FirstVParameter() <= -Precision::Infinite() ? -theMaxParam : BS.FirstVParameter();
 586   Standard_Real LastV  = BS.LastVParameter()  >=  Precision::Infinite() ?  theMaxParam : BS.LastVParameter();
 587
 588   if (BS.GetType() == GeomAbs_Plane)
 589   {
 590     gp_Pnt pcur;
 591     Handle(TColgp_HArray1OfPnt) P = new TColgp_HArray1OfPnt (1, 5);
 592     BS.D0 (FirstU, FirstV, pcur);
 593     P->SetValue (1, pcur);
 594     BS.D0 (LastU, FirstV, pcur);
 595     P->SetValue (2, pcur);
 596     BS.D0 (LastU, LastV, pcur);
 597     P->SetValue (3, pcur);
 598     BS.D0 (FirstU, LastV, pcur);
 599     P->SetValue (4, pcur);
 600     P->SetValue (5, P->Value (1));
 601     // if the plane is "infinite", it is sensitive only on the border limited by MaxParam
 602     if (FirstU == -theMaxParam && LastU == theMaxParam && FirstV == -theMaxParam && LastV == theMaxParam)
 603     {
 604       theSensitiveList.Append (new Select3D_SensitiveFace (theOwner, P, Select3D_TOS_BOUNDARY));
 605     }
 606     else
 607     {
 608       Select3D_TypeOfSensitivity TS = theInteriorFlag ? Select3D_TOS_INTERIOR : Select3D_TOS_BOUNDARY;
 609       theSensitiveList.Append (new Select3D_SensitiveFace (theOwner, P, TS));
 610     }
 611     return Standard_True;
 612   }
 613
 614   // This is construction of a sevsitive polygon from the exterior contour of the face...
 615   // It is not good at all, but...
 616   TopoDS_Wire aWire;
 617   TopExp_Explorer anExpWiresInFace (theFace, TopAbs_WIRE);
 618   if (anExpWiresInFace.More())
 619   {
 620     // believing that this is the first... to be seen
 621     aWire = TopoDS::Wire (anExpWiresInFace.Current());
 622   }
 623   if (aWire.IsNull())
 624   {
 625     return Standard_False;
 626   }
 627
 628   TColgp_SequenceOfPnt WirePoints;
 629   Standard_Boolean FirstExp = Standard_True;
 630   Standard_Real wf, wl;
 631   BRepAdaptor_Curve cu3d;
 632   for (BRepTools_WireExplorer aWireExplorer (aWire);
 633        aWireExplorer.More(); aWireExplorer.Next())
 634   {
 635     cu3d.Initialize (aWireExplorer.Current());
 636     BRep_Tool::Range (aWireExplorer.Current(), wf, wl);
 637     if (Abs (wf - wl) <= Precision::Confusion())
 638     {
 639     #ifdef OCCT_DEBUG
 640       cout<<" StdSelect_BRepSelectionTool : Curve where ufirst = ulast ...."<<endl;
 641     #endif
 642     }
 643     else
 644     {
 645       if (FirstExp)
 646       {
 647         if (aWireExplorer.Orientation() == TopAbs_FORWARD)
 648         {
 649           WirePoints.Append (cu3d.Value (wf));
 650         }
 651         else
 652         {
 653           WirePoints.Append (cu3d.Value (wl));
 654         }
 655         FirstExp = Standard_False;
 656       }
 657
 658       switch (cu3d.GetType())
 659       {
 660         case GeomAbs_Line:
 661         {
 662           WirePoints.Append (cu3d.Value ((aWireExplorer.Orientation() == TopAbs_FORWARD) ? wl : wf));
 663           break;
 664         }
 665         case GeomAbs_Circle:
 666         {
 667           if (2 * M_PI - Abs (wl - wf) <= Precision::Confusion())
 668           {
 669             if (BS.GetType() == GeomAbs_Cylinder ||
 670                 BS.GetType() == GeomAbs_Torus ||
 671                 BS.GetType() == GeomAbs_Cone  ||
 672                 BS.GetType() == GeomAbs_BSplineSurface) // beuurkk pour l'instant...
 673             {
 674               Standard_Real ff = wf ,ll = wl;
 675               Standard_Real dw =(Max (wf, wl) - Min (wf, wl)) / (Standard_Real )Max (2, NbPOnEdge - 1);
 676               if (aWireExplorer.Orientation() == TopAbs_FORWARD)
 677               {
 678                 for (Standard_Real wc = wf + dw; wc <= wl; wc += dw)
 679                 {
 680                   WirePoints.Append (cu3d.Value (wc));
 681                 }
 682               }
 683               else if (aWireExplorer.Orientation() == TopAbs_REVERSED)
 684               {
 685                 for (Standard_Real wc = ll - dw; wc >= ff; wc -= dw)
 686                 {
 687                   WirePoints.Append (cu3d.Value (wc));
 688                 }
 689               }
 690             }
 691             else
 692             {
 693               if (cu3d.Circle().Radius() <= Precision::Confusion())
 694               {
 695                 theSensitiveList.Append (new Select3D_SensitivePoint (theOwner, cu3d.Circle().Location()));
 696               }
 697               else
 698               {
 699                 theSensitiveList.Append (new Select3D_SensitiveCircle (theOwner, new Geom_Circle (cu3d.Circle()), theInteriorFlag, 16));
 700               }
 701             }
 702           }
 703           else
 704           {
 705             Standard_Real ff = wf, ll = wl;
 706             Standard_Real dw = (Max (wf, wl) - Min (wf, wl)) / (Standard_Real )Max (2, NbPOnEdge - 1);
 707             if (aWireExplorer.Orientation() == TopAbs_FORWARD)
 708             {
 709               for (Standard_Real wc = wf + dw; wc <= wl; wc += dw)
 710               {
 711                 WirePoints.Append (cu3d.Value (wc));
 712               }
 713             }
 714             else if (aWireExplorer.Orientation() == TopAbs_REVERSED)
 715             {
 716               for (Standard_Real wc = ll - dw; wc >= ff; wc -= dw)
 717               {
 718                 WirePoints.Append (cu3d.Value (wc));
 719               }
 720             }
 721           }
 722           break;
 723         }
 724         default:
 725         {
 726           Standard_Real ff = wf, ll = wl;
 727           Standard_Real dw = (Max (wf, wl) - Min (wf, wl)) / (Standard_Real )Max (2, NbPOnEdge - 1);
 728           if (aWireExplorer.Orientation()==TopAbs_FORWARD)
 729           {
 730             for (Standard_Real wc = wf + dw; wc <= wl; wc += dw)
 731             {
 732               WirePoints.Append (cu3d.Value (wc));
 733             }
 734           }
 735           else if (aWireExplorer.Orientation() == TopAbs_REVERSED)
 736           {
 737             for (Standard_Real wc = ll - dw; wc >= ff; wc -= dw)
 738             {
 739               WirePoints.Append (cu3d.Value (wc));
 740             }
 741           }
 742         }
 743       }
 744     }
 745   }
 746   Standard_Integer ArrayPosition = WirePoints.Length();
 747
 748   Handle(TColgp_HArray1OfPnt) facepoints = new TColgp_HArray1OfPnt (1, ArrayPosition);
 749   for (Standard_Integer I = 1; I <= ArrayPosition; ++I)
 750   {
 751     facepoints->SetValue (I, WirePoints.Value(I));
 752   }
 753
 754   if ((facepoints->Array1()).Length() > 1)
 755   { //1 if only one circular edge
 756     Select3D_TypeOfSensitivity TS = theInteriorFlag ? Select3D_TOS_INTERIOR : Select3D_TOS_BOUNDARY;
 757     theSensitiveList.Append (new Select3D_SensitiveFace (theOwner, facepoints, TS));
 758   }
 759   return Standard_True;
 760 }