src/PartSet/PartSet_Tools.cpp

   1 // File:        PartSet_Tools.h
   2 // Created:     28 Apr 2014
   3 // Author:      Natalia ERMOLAEVA
   4
   5 #include <PartSet_Tools.h>
   6
   7 #include <ModelAPI_Data.h>
   8 #include <ModelAPI_AttributeDouble.h>
   9 #include <ModelAPI_AttributeRefList.h>
  10 #include <ModelAPI_Document.h>
  11 #include <ModelAPI_Session.h>
  12 #include <ModelAPI_ResultConstruction.h>
  13
  14 #include <GeomDataAPI_Point.h>
  15 #include <GeomDataAPI_Dir.h>
  16 #include <GeomDataAPI_Point2D.h>
  17 #include <GeomAPI_Pln.h>
  18 #include <GeomAPI_Pnt2d.h>
  19 #include <GeomAPI_Pnt.h>
  20 #include <GeomAPI_Edge.h>
  21
  22 #include <GeomAPI_Dir.h>
  23 #include <GeomAPI_XYZ.h>
  24
  25 #include <SketchPlugin_Feature.h>
  26 #include <SketchPlugin_Sketch.h>
  27 #include <SketchPlugin_ConstraintCoincidence.h>
  28 #include <SketchPlugin_ConstraintDistance.h>
  29 #include <SketchPlugin_ConstraintLength.h>
  30 #include <SketchPlugin_ConstraintRadius.h>
  31 #include <SketchPlugin_ConstraintRigid.h>
  32 #include <SketchPlugin_Constraint.h>
  33 #include <SketchPlugin_Circle.h>
  34 #include <SketchPlugin_Arc.h>
  35 #include <SketchPlugin_Line.h>
  36
  37 #include <ModuleBase_ViewerPrs.h>
  38
  39 #include <V3d_View.hxx>
  40 #include <gp_Pln.hxx>
  41 #include <gp_Circ.hxx>
  42 #include <ProjLib.hxx>
  43 #include <ElSLib.hxx>
  44 #include <Geom_Line.hxx>
  45 #include <GeomAPI_ProjectPointOnCurve.hxx>
  46 #include <BRep_Tool.hxx>
  47 #include <TopoDS.hxx>
  48 #include <TopoDS_Edge.hxx>
  49
  50 #ifdef _DEBUG
  51 #include <QDebug>
  52 #endif
  53
  54 const double PRECISION_TOLERANCE = 0.000001;
  55
  56 gp_Pnt PartSet_Tools::convertClickToPoint(QPoint thePoint, Handle(V3d_View) theView)
  57 {
  58   if (theView.IsNull())
  59     return gp_Pnt();
  60
  61   V3d_Coordinate XEye, YEye, ZEye, XAt, YAt, ZAt;
  62   theView->Eye(XEye, YEye, ZEye);
  63
  64   theView->At(XAt, YAt, ZAt);
  65   gp_Pnt EyePoint(XEye, YEye, ZEye);
  66   gp_Pnt AtPoint(XAt, YAt, ZAt);
  67
  68   gp_Vec EyeVector(EyePoint, AtPoint);
  69   gp_Dir EyeDir(EyeVector);
  70
  71   gp_Pln PlaneOfTheView = gp_Pln(AtPoint, EyeDir);
  72   Standard_Real X, Y, Z;
  73   theView->Convert(thePoint.x(), thePoint.y(), X, Y, Z);
  74   gp_Pnt ConvertedPoint(X, Y, Z);
  75
  76   gp_Pnt2d ConvertedPointOnPlane = ProjLib::Project(PlaneOfTheView, ConvertedPoint);
  77   gp_Pnt ResultPoint = ElSLib::Value(ConvertedPointOnPlane.X(), ConvertedPointOnPlane.Y(),
  78                                      PlaneOfTheView);
  79   return ResultPoint;
  80 }
  81
  82 void PartSet_Tools::convertTo2D(const gp_Pnt& thePoint, FeaturePtr theSketch,
  83 Handle(V3d_View) theView,
  84                                 double& theX, double& theY)
  85 {
  86   if (!theSketch)
  87     return;
  88
  89   AttributeDoublePtr anAttr;
  90   boost::shared_ptr<ModelAPI_Data> aData = theSketch->data();
  91
  92   boost::shared_ptr<GeomDataAPI_Point> anOrigin = boost::dynamic_pointer_cast<GeomDataAPI_Point>(
  93       aData->attribute(SketchPlugin_Sketch::ORIGIN_ID()));
  94
  95   boost::shared_ptr<GeomDataAPI_Dir> aX = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
  96       aData->attribute(SketchPlugin_Sketch::DIRX_ID()));
  97   boost::shared_ptr<GeomDataAPI_Dir> anY = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
  98       aData->attribute(SketchPlugin_Sketch::DIRY_ID()));
  99
 100   gp_Pnt anOriginPnt(anOrigin->x(), anOrigin->y(), anOrigin->z());
 101   gp_Vec aVec(anOriginPnt, thePoint);
 102
 103   if (!theView.IsNull()) {
 104     V3d_Coordinate XEye, YEye, ZEye, XAt, YAt, ZAt;
 105     theView->Eye(XEye, YEye, ZEye);
 106
 107     theView->At(XAt, YAt, ZAt);
 108     gp_Pnt EyePoint(XEye, YEye, ZEye);
 109     gp_Pnt AtPoint(XAt, YAt, ZAt);
 110
 111     gp_Vec anEyeVec(EyePoint, AtPoint);
 112     anEyeVec.Normalize();
 113
 114     boost::shared_ptr<GeomDataAPI_Dir> aNormal = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
 115         aData->attribute(SketchPlugin_Sketch::NORM_ID()));
 116     gp_Vec aNormalVec(aNormal->x(), aNormal->y(), aNormal->z());
 117
 118     double aDen = anEyeVec * aNormalVec;
 119     double aLVec = aDen != 0 ? aVec * aNormalVec / aDen : DBL_MAX;
 120
 121     gp_Vec aDeltaVec = anEyeVec * aLVec;
 122     aVec = aVec - aDeltaVec;
 123   }
 124   theX = aVec.X() * aX->x() + aVec.Y() * aX->y() + aVec.Z() * aX->z();
 125   theY = aVec.X() * anY->x() + aVec.Y() * anY->y() + aVec.Z() * anY->z();
 126 }
 127
 128 void PartSet_Tools::convertTo3D(const double theX, const double theY, FeaturePtr theSketch,
 129                                 gp_Pnt& thePoint)
 130 {
 131   if (!theSketch)
 132     return;
 133
 134   boost::shared_ptr<ModelAPI_Data> aData = theSketch->data();
 135
 136   boost::shared_ptr<GeomDataAPI_Point> aC = boost::dynamic_pointer_cast<GeomDataAPI_Point>(
 137       aData->attribute(SketchPlugin_Sketch::ORIGIN_ID()));
 138   boost::shared_ptr<GeomDataAPI_Dir> aX = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
 139       aData->attribute(SketchPlugin_Sketch::DIRX_ID()));
 140   boost::shared_ptr<GeomDataAPI_Dir> aY = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
 141       aData->attribute(SketchPlugin_Sketch::DIRY_ID()));
 142
 143   boost::shared_ptr<GeomAPI_XYZ> aSum = aC->pnt()->xyz()->added(aX->dir()->xyz()->multiplied(theX))
 144       ->added(aY->dir()->xyz()->multiplied(theY));
 145
 146   boost::shared_ptr<GeomAPI_Pnt> aPoint = boost::shared_ptr<GeomAPI_Pnt>(new GeomAPI_Pnt(aSum));
 147   thePoint = gp_Pnt(aPoint->x(), aPoint->y(), aPoint->z());
 148 }
 149
 150 FeaturePtr PartSet_Tools::nearestFeature(QPoint thePoint, Handle_V3d_View theView,
 151                                          FeaturePtr theSketch,
 152                                          const QList<ModuleBase_ViewerPrs>& theFeatures)
 153 {
 154   double aX, anY;
 155   gp_Pnt aPoint = PartSet_Tools::convertClickToPoint(thePoint, theView);
 156   PartSet_Tools::convertTo2D(aPoint, theSketch, theView, aX, anY);
 157
 158   FeaturePtr aFeature;
 159   FeaturePtr aDeltaFeature;
 160   double aMinDelta = -1;
 161   ModuleBase_ViewerPrs aPrs;
 162   foreach (ModuleBase_ViewerPrs aPrs, theFeatures) {
 163     if (!aPrs.object())
 164       continue;
 165     boost::shared_ptr<SketchPlugin_Feature> aSketchFeature = boost::dynamic_pointer_cast<
 166         SketchPlugin_Feature>(aPrs.object());
 167     if (!aSketchFeature)
 168       continue;
 169     double aDelta = aSketchFeature->distanceToPoint(
 170         boost::shared_ptr<GeomAPI_Pnt2d>(new GeomAPI_Pnt2d(aX, anY)));
 171     if (aMinDelta < 0 || aMinDelta > aDelta) {
 172       aMinDelta = aDelta;
 173       // TODO aDeltaFeature = aPrs.result();
 174     }
 175   }
 176   return aDeltaFeature;
 177 }
 178
 179 boost::shared_ptr<ModelAPI_Document> PartSet_Tools::document()
 180 {
 181   return ModelAPI_Session::get()->moduleDocument();
 182 }
 183
 184 boost::shared_ptr<GeomDataAPI_Point2D> PartSet_Tools::getFeaturePoint(FeaturePtr theFeature,
 185                                                                       double theX, double theY)
 186 {
 187   boost::shared_ptr<GeomAPI_Pnt2d> aClickedPoint = boost::shared_ptr<GeomAPI_Pnt2d>(
 188                                                                  new GeomAPI_Pnt2d(theX, theY));
 189   std::list<boost::shared_ptr<ModelAPI_Attribute> > anAttiributes =
 190                                     theFeature->data()->attributes(GeomDataAPI_Point2D::type());
 191   std::list<boost::shared_ptr<ModelAPI_Attribute> >::const_iterator anIt = anAttiributes.begin(),
 192                                                                     aLast = anAttiributes.end();
 193   boost::shared_ptr<GeomDataAPI_Point2D> aFPoint;
 194   for (; anIt != aLast && !aFPoint; anIt++) {
 195     boost::shared_ptr<GeomDataAPI_Point2D> aCurPoint = boost::dynamic_pointer_cast<
 196         GeomDataAPI_Point2D>(*anIt);
 197     if (aCurPoint && aCurPoint->pnt()->distance(aClickedPoint) < Precision::Confusion())
 198       aFPoint = aCurPoint;
 199   }
 200
 201   return aFPoint;
 202 }
 203
 204 void PartSet_Tools::setFeatureValue(FeaturePtr theFeature, double theValue,
 205                                     const std::string& theAttribute)
 206 {
 207   if (!theFeature)
 208     return;
 209   boost::shared_ptr<ModelAPI_Data> aData = theFeature->data();
 210   AttributeDoublePtr anAttribute = boost::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 211       aData->attribute(theAttribute));
 212   if (anAttribute)
 213     anAttribute->setValue(theValue);
 214 }
 215
 216 double PartSet_Tools::featureValue(FeaturePtr theFeature, const std::string& theAttribute,
 217                                    bool& isValid)
 218 {
 219   isValid = false;
 220   double aValue;
 221   if (theFeature) {
 222     boost::shared_ptr<ModelAPI_Data> aData = theFeature->data();
 223     AttributeDoublePtr anAttribute = boost::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 224         aData->attribute(theAttribute));
 225     if (anAttribute) {
 226       aValue = anAttribute->value();
 227       isValid = true;
 228     }
 229   }
 230   return aValue;
 231 }
 232
 233 FeaturePtr PartSet_Tools::feature(FeaturePtr theFeature, const std::string& theAttribute,
 234                                   const std::string& theKind)
 235 {
 236   FeaturePtr aFeature;
 237   if (!theFeature)
 238     return aFeature;
 239
 240   boost::shared_ptr<ModelAPI_Data> aData = theFeature->data();
 241   boost::shared_ptr<ModelAPI_AttributeRefAttr> anAttr = boost::dynamic_pointer_cast<
 242       ModelAPI_AttributeRefAttr>(aData->attribute(theAttribute));
 243   if (anAttr) {
 244     aFeature = boost::dynamic_pointer_cast<ModelAPI_Feature>(anAttr->object());
 245     if (!theKind.empty() && aFeature && aFeature->getKind() != theKind) {
 246       aFeature = FeaturePtr();
 247     }
 248   }
 249   return aFeature;
 250 }
 251
 252 void PartSet_Tools::createConstraint(CompositeFeaturePtr theSketch,
 253                                      boost::shared_ptr<GeomDataAPI_Point2D> thePoint1,
 254                                      boost::shared_ptr<GeomDataAPI_Point2D> thePoint2)
 255 {
 256   FeaturePtr aFeature;
 257   if (theSketch) {
 258     aFeature = theSketch->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 259   } else {
 260     boost::shared_ptr<ModelAPI_Document> aDoc = document();
 261     aFeature = aDoc->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 262   }
 263
 264   boost::shared_ptr<ModelAPI_Data> aData = aFeature->data();
 265
 266   boost::shared_ptr<ModelAPI_AttributeRefAttr> aRef1 = boost::dynamic_pointer_cast<
 267       ModelAPI_AttributeRefAttr>(aData->attribute(SketchPlugin_Constraint::ENTITY_A()));
 268   aRef1->setAttr(thePoint1);
 269
 270   boost::shared_ptr<ModelAPI_AttributeRefAttr> aRef2 = boost::dynamic_pointer_cast<
 271       ModelAPI_AttributeRefAttr>(aData->attribute(SketchPlugin_Constraint::ENTITY_B()));
 272   aRef2->setAttr(thePoint2);
 273
 274   if (aFeature)  // TODO: generate an error if feature was not created
 275     aFeature->execute();
 276 }
 277
 278 void PartSet_Tools::setConstraints(CompositeFeaturePtr theSketch, FeaturePtr theFeature,
 279                                    const std::string& theAttribute, double theClickedX,
 280                                    double theClickedY)
 281 {
 282   // find a feature point by the selection mode
 283   //boost::shared_ptr<GeomDataAPI_Point2D> aPoint = featurePoint(theMode);
 284   boost::shared_ptr<GeomDataAPI_Point2D> aFeaturePoint = boost::dynamic_pointer_cast<
 285       GeomDataAPI_Point2D>(theFeature->data()->attribute(theAttribute));
 286   if (!aFeaturePoint)
 287     return;
 288
 289   // get all sketch features. If the point with the given coordinates belong to any sketch feature,
 290   // the constraint is created between the feature point and the found sketch point
 291   boost::shared_ptr<ModelAPI_Data> aData = theSketch->data();
 292   boost::shared_ptr<ModelAPI_AttributeRefList> aRefList = boost::dynamic_pointer_cast<
 293       ModelAPI_AttributeRefList>(aData->attribute(SketchPlugin_Sketch::FEATURES_ID()));
 294
 295   std::list<ObjectPtr> aFeatures = aRefList->list();
 296   std::list<ObjectPtr>::const_iterator anIt = aFeatures.begin(), aLast = aFeatures.end();
 297   std::list<boost::shared_ptr<ModelAPI_Attribute> > anAttiributes;
 298   boost::shared_ptr<GeomAPI_Pnt2d> aClickedPoint = boost::shared_ptr<GeomAPI_Pnt2d>(
 299       new GeomAPI_Pnt2d(theClickedX, theClickedY));
 300   for (; anIt != aLast; anIt++) {
 301     FeaturePtr aFeature = boost::dynamic_pointer_cast<ModelAPI_Feature>(*anIt);
 302     // find the given point in the feature attributes
 303     anAttiributes = aFeature->data()->attributes(GeomDataAPI_Point2D::type());
 304     std::list<boost::shared_ptr<ModelAPI_Attribute> >::const_iterator anIt = anAttiributes.begin(),
 305         aLast = anAttiributes.end();
 306     boost::shared_ptr<GeomDataAPI_Point2D> aFPoint;
 307     for (; anIt != aLast && !aFPoint; anIt++) {
 308       boost::shared_ptr<GeomDataAPI_Point2D> aCurPoint = boost::dynamic_pointer_cast<
 309           GeomDataAPI_Point2D>(*anIt);
 310       if (aCurPoint && aCurPoint->pnt()->distance(aClickedPoint) < Precision::Confusion())
 311         aFPoint = aCurPoint;
 312     }
 313     if (aFPoint)
 314       PartSet_Tools::createConstraint(theSketch, aFPoint, aFeaturePoint);
 315   }
 316 }
 317
 318 boost::shared_ptr<GeomAPI_Pln> PartSet_Tools::sketchPlane(CompositeFeaturePtr theSketch)
 319 {
 320   boost::shared_ptr<GeomAPI_Pln> aPlane;
 321   double aA, aB, aC, aD;
 322
 323   boost::shared_ptr<ModelAPI_Data> aData = theSketch->data();
 324   boost::shared_ptr<GeomDataAPI_Point> anOrigin = boost::dynamic_pointer_cast<GeomDataAPI_Point>(
 325       aData->attribute(SketchPlugin_Sketch::ORIGIN_ID()));
 326   boost::shared_ptr<GeomDataAPI_Dir> aNormal = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
 327       aData->attribute(SketchPlugin_Sketch::NORM_ID()));
 328   aA = aNormal->x();
 329   aB = aNormal->y();
 330   aC = aNormal->z();
 331   aD = 0;
 332
 333   aPlane = boost::shared_ptr<GeomAPI_Pln>(new GeomAPI_Pln(aA, aB, aC, aD));
 334   return aPlane;
 335 }
 336
 337 boost::shared_ptr<GeomAPI_Pnt> PartSet_Tools::point3D(boost::shared_ptr<GeomAPI_Pnt2d> thePoint2D,
 338                                                       CompositeFeaturePtr theSketch)
 339 {
 340   boost::shared_ptr<GeomAPI_Pnt> aPoint;
 341   if (!theSketch || !thePoint2D)
 342     return aPoint;
 343
 344   boost::shared_ptr<GeomDataAPI_Point> aC = boost::dynamic_pointer_cast<GeomDataAPI_Point>(
 345       theSketch->data()->attribute(SketchPlugin_Sketch::ORIGIN_ID()));
 346   boost::shared_ptr<GeomDataAPI_Dir> aX = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
 347       theSketch->data()->attribute(SketchPlugin_Sketch::DIRX_ID()));
 348   boost::shared_ptr<GeomDataAPI_Dir> aY = boost::dynamic_pointer_cast<GeomDataAPI_Dir>(
 349       theSketch->data()->attribute(SketchPlugin_Sketch::DIRY_ID()));
 350
 351   return thePoint2D->to3D(aC->pnt(), aX->dir(), aY->dir());
 352 }
 353
 354 bool PartSet_Tools::isConstraintFeature(const std::string& theKind)
 355 {
 356   return theKind == SketchPlugin_ConstraintDistance::ID()
 357       || theKind == SketchPlugin_ConstraintLength::ID()
 358       || theKind == SketchPlugin_ConstraintRadius::ID()
 359       || theKind == SketchPlugin_ConstraintRigid::ID();
 360 }
 361
 362 ResultPtr PartSet_Tools::createFixedObjectByEdge(const ModuleBase_ViewerPrs& thePrs, CompositeFeaturePtr theSketch)
 363 {
 364   TopoDS_Shape aShape = thePrs.shape();
 365   if (aShape.ShapeType() != TopAbs_EDGE)
 366     return ResultPtr();
 367
 368   // Check that we already have such external edge
 369   boost::shared_ptr<GeomAPI_Edge> aInEdge = boost::shared_ptr<GeomAPI_Edge>(new GeomAPI_Edge());
 370   aInEdge->setImpl(new TopoDS_Shape(aShape));
 371   ResultPtr aResult = findExternalEdge(theSketch, aInEdge);
 372   if (aResult)
 373     return aResult;
 374
 375   // If not found then we have to create new
 376   Standard_Real aStart, aEnd;
 377   Handle(V3d_View) aNullView;
 378   FeaturePtr aMyFeature;
 379
 380   Handle(Geom_Curve) aCurve = BRep_Tool::Curve(TopoDS::Edge(aShape), aStart, aEnd);
 381   GeomAdaptor_Curve aAdaptor(aCurve);
 382   if (aAdaptor.GetType() == GeomAbs_Line) {
 383     // Create line
 384     aMyFeature = theSketch->addFeature(SketchPlugin_Line::ID());
 385
 386     //DataPtr aData = myFeature->data();
 387     //boost::shared_ptr<GeomDataAPI_Point2D> anEndAttr =
 388     //  boost::dynamic_pointer_cast<GeomDataAPI_Point2D>(aData->attribute(SketchPlugin_Line::END_ID()));
 389
 390     //double aX, aY;
 391     //gp_Pnt Pnt1 = aAdaptor.Value(aStart);
 392     //convertTo2D(Pnt1, theSketch, aNullView, aX, aY);
 393     //setFeaturePoint(myFeature, aX, aY, SketchPlugin_Line::START_ID());
 394
 395     //gp_Pnt Pnt2 = aAdaptor.Value(aEnd);
 396     //convertTo2D(Pnt2, theSketch, aNullView, aX, aY);
 397     //setFeaturePoint(myFeature, aX, aY, SketchPlugin_Line::END_ID());
 398   } else if (aAdaptor.GetType() == GeomAbs_Circle) {
 399     if (aAdaptor.IsClosed()) {
 400       // Create circle
 401       aMyFeature = theSketch->addFeature(SketchPlugin_Circle::ID());
 402       //gp_Circ aCirc = aAdaptor.Circle();
 403       //gp_Pnt aCenter = aCirc.Location();
 404
 405       //double aX, aY;
 406       //convertTo2D(aCenter, theSketch, aNullView, aX, aY);
 407       //setFeaturePoint(myFeature, aX, aY, SketchPlugin_Circle::CENTER_ID());
 408       //setFeatureValue(myFeature, aCirc.Radius(), SketchPlugin_Circle::RADIUS_ID());
 409     } else {
 410       // Create arc
 411       aMyFeature = theSketch->addFeature(SketchPlugin_Arc::ID());
 412     }
 413   }
 414   if (aMyFeature) {
 415     DataPtr aData = aMyFeature->data();
 416     AttributeSelectionPtr anAttr =
 417       boost::dynamic_pointer_cast<ModelAPI_AttributeSelection>
 418       (aData->attribute(SketchPlugin_Feature::EXTERNAL_ID()));
 419
 420     ResultPtr aRes = boost::dynamic_pointer_cast<ModelAPI_Result>(thePrs.object());
 421     if (anAttr && aRes) {
 422       boost::shared_ptr<GeomAPI_Shape> anEdge(new GeomAPI_Shape);
 423       anEdge->setImpl(new TopoDS_Shape(aShape));
 424
 425       anAttr->setValue(aRes, anEdge);
 426
 427       aMyFeature->execute();
 428
 429       // fix this edge
 430       FeaturePtr aFix = theSketch->addFeature(SketchPlugin_ConstraintRigid::ID());
 431       aFix->data()->refattr(SketchPlugin_Constraint::ENTITY_A())->
 432         setObject(aMyFeature->lastResult());
 433
 434       return aMyFeature->lastResult();
 435     }
 436   }
 437   return ResultPtr();
 438 }
 439
 440 bool PartSet_Tools::isContainPresentation(const QList<ModuleBase_ViewerPrs>& theSelected,
 441                                           const ModuleBase_ViewerPrs& thePrs)
 442 {
 443   foreach (ModuleBase_ViewerPrs aPrs, theSelected) {
 444     if (aPrs.object() == thePrs.object())
 445       return true;
 446   }
 447   return false;
 448 }
 449
 450 ResultPtr PartSet_Tools::findExternalEdge(CompositeFeaturePtr theSketch, boost::shared_ptr<GeomAPI_Edge> theEdge)
 451 {
 452   for (int i = 0; i < theSketch->numberOfSubs(); i++) {
 453     FeaturePtr aFeature = theSketch->subFeature(i);
 454     boost::shared_ptr<SketchPlugin_Feature> aSketchFea =
 455       boost::dynamic_pointer_cast<SketchPlugin_Feature>(aFeature);
 456     if (aSketchFea) {
 457       if (aSketchFea->isExternal()) {
 458         std::list<ResultPtr> aResults = aSketchFea->results();
 459         std::list<ResultPtr>::const_iterator aIt;
 460         for (aIt = aResults.cbegin(); aIt != aResults.cend(); ++aIt) {
 461           ResultConstructionPtr aRes =
 462             boost::dynamic_pointer_cast<ModelAPI_ResultConstruction>(*aIt);
 463           if (aRes) {
 464             boost::shared_ptr<GeomAPI_Shape> aShape = aRes->shape();
 465             if (aShape) {
 466               if (theEdge->isEqual(aShape))
 467                 return aRes;
 468             }
 469           }
 470         }
 471       }
 472     }
 473   }
 474   return ResultPtr();
 475 }