src/PartSet/PartSet_WidgetPoint2d.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
   2
   3 // File:        PartSet_WidgetPoint2D.cpp
   4 // Created:     25 Apr 2014
   5 // Author:      Natalia ERMOLAEVA
   6
   7 #include "PartSet_WidgetPoint2d.h"
   8 #include <PartSet_Tools.h>
   9 #include <PartSet_Module.h>
  10
  11 #include <ModuleBase_ParamSpinBox.h>
  12 #include <ModuleBase_Tools.h>
  13 #include <ModuleBase_IViewer.h>
  14 #include <ModuleBase_IViewWindow.h>
  15 #include <ModuleBase_ISelection.h>
  16
  17 #include <Config_Keywords.h>
  18 #include <Config_WidgetAPI.h>
  19
  20 #include <Events_Loop.h>
  21 #include <ModelAPI_Events.h>
  22
  23 #include <ModelAPI_Feature.h>
  24 #include <ModelAPI_Data.h>
  25 #include <ModelAPI_Object.h>
  26 #include <GeomDataAPI_Point2D.h>
  27 #include <GeomAPI_Pnt2d.h>
  28
  29 #include <SketchPlugin_Feature.h>
  30 #include <SketchPlugin_ConstraintCoincidence.h>
  31 #include <SketchPlugin_Line.h>
  32 #include <SketchPlugin_Arc.h>
  33 #include <SketchPlugin_Circle.h>
  34 #include <SketchPlugin_Point.h>
  35
  36 #include <QGroupBox>
  37 #include <QGridLayout>
  38 #include <QLabel>
  39 #include <QEvent>
  40 #include <QMouseEvent>
  41 #include <QApplication>
  42
  43 #include <TopoDS.hxx>
  44 #include <TopoDS_Vertex.hxx>
  45 #include <BRep_Tool.hxx>
  46
  47 #include <cfloat>
  48 #include <climits>
  49
  50 const double MaxCoordinate = 1e12;
  51
  52 static QStringList MyFeaturesForCoincedence;
  53
  54 PartSet_WidgetPoint2D::PartSet_WidgetPoint2D(QWidget* theParent,
  55                                              ModuleBase_IWorkshop* theWorkshop,
  56                                              const Config_WidgetAPI* theData,
  57                                              const std::string& theParentId)
  58  : ModuleBase_ModelWidget(theParent, theData, theParentId), myWorkshop(theWorkshop)
  59 {
  60   if (MyFeaturesForCoincedence.isEmpty()) {
  61     MyFeaturesForCoincedence << SketchPlugin_Line::ID().c_str()
  62       << SketchPlugin_Arc::ID().c_str()
  63       << SketchPlugin_Point::ID().c_str()
  64       << SketchPlugin_Circle::ID().c_str();
  65   }
  66
  67   // the control should accept the focus, so the boolen flag is corrected to be true
  68   myIsObligatory = true;
  69   //myOptionParam = theData->getProperty(PREVIOUS_FEATURE_PARAM);
  70   QString aPageName = QString::fromStdString(theData->getProperty(CONTAINER_PAGE_NAME));
  71   myGroupBox = new QGroupBox(aPageName, theParent);
  72   myGroupBox->setFlat(false);
  73
  74   QGridLayout* aGroupLay = new QGridLayout(myGroupBox);
  75   ModuleBase_Tools::adjustMargins(aGroupLay);
  76   aGroupLay->setSpacing(2);
  77   aGroupLay->setColumnStretch(1, 1);
  78   {
  79     QLabel* aLabel = new QLabel(myGroupBox);
  80     aLabel->setText(tr("X "));
  81     aGroupLay->addWidget(aLabel, 0, 0);
  82
  83     myXSpin = new ModuleBase_ParamSpinBox(myGroupBox);
  84     myXSpin->setMinimum(-DBL_MAX);
  85     myXSpin->setMaximum(DBL_MAX);
  86     myXSpin->setToolTip(tr("X"));
  87     aGroupLay->addWidget(myXSpin, 0, 1);
  88
  89     connect(myXSpin, SIGNAL(valueChanged(const QString&)), this, SIGNAL(valuesModified()));
  90   }
  91   {
  92     QLabel* aLabel = new QLabel(myGroupBox);
  93     aLabel->setText(tr("Y "));
  94     aGroupLay->addWidget(aLabel, 1, 0);
  95
  96     myYSpin = new ModuleBase_ParamSpinBox(myGroupBox);
  97     myYSpin->setMinimum(-DBL_MAX);
  98     myYSpin->setMaximum(DBL_MAX);
  99     myYSpin->setToolTip(tr("Y"));
 100     aGroupLay->addWidget(myYSpin, 1, 1);
 101
 102     connect(myYSpin, SIGNAL(valueChanged(const QString&)), this, SIGNAL(valuesModified()));
 103   }
 104   QVBoxLayout* aLayout = new QVBoxLayout(this);
 105   ModuleBase_Tools::zeroMargins(aLayout);
 106   aLayout->addWidget(myGroupBox);
 107   setLayout(aLayout);
 108 }
 109
 110 bool PartSet_WidgetPoint2D::resetCustom()
 111 {
 112   bool aDone = false;
 113   if (!isUseReset() || isComputedDefault() || myXSpin->hasVariable() || myYSpin->hasVariable()) {
 114     aDone = false;
 115   }
 116   else {
 117     bool isOk;
 118     double aDefValue = QString::fromStdString(getDefaultValue()).toDouble(&isOk);
 119     // it is important to block the spin box control in order to do not through out the
 120     // locking of the validating state.
 121     ModuleBase_Tools::setSpinValue(myXSpin, isOk ? aDefValue : 0.0);
 122     ModuleBase_Tools::setSpinValue(myYSpin, isOk ? aDefValue : 0.0);
 123     storeValueCustom();
 124     aDone = true;
 125   }
 126   return aDone;
 127 }
 128
 129 PartSet_WidgetPoint2D::~PartSet_WidgetPoint2D()
 130 {
 131 }
 132
 133 bool PartSet_WidgetPoint2D::setSelection(QList<ModuleBase_ViewerPrs>& theValues,
 134                                          const bool theToValidate)
 135 {
 136   if (theValues.empty())
 137     return false;
 138
 139   ModuleBase_ViewerPrs aValue = theValues.takeFirst();
 140
 141   Handle(V3d_View) aView = myWorkshop->viewer()->activeView();
 142   bool isDone = false;
 143   TopoDS_Shape aShape = aValue.shape();
 144   double aX, aY;
 145   if (getPoint2d(aView, aShape, aX, aY)) {
 146     isDone = setPoint(aX, aY);
 147   }
 148   return isDone;
 149 }
 150
 151 bool PartSet_WidgetPoint2D::setPoint(double theX, double theY)
 152 {
 153   if (fabs(theX) >= MaxCoordinate)
 154     return false;
 155   if (fabs(theY) >= MaxCoordinate)
 156     return false;
 157
 158   ModuleBase_Tools::setSpinValue(myXSpin, theX);
 159   ModuleBase_Tools::setSpinValue(myYSpin, theY);
 160
 161   storeValue();
 162   return true;
 163 }
 164
 165 bool PartSet_WidgetPoint2D::storeValueCustom() const
 166 {
 167   std::shared_ptr<ModelAPI_Data> aData = myFeature->data();
 168   if (!aData) // can be on abort of sketcher element
 169     return false;
 170   std::shared_ptr<GeomDataAPI_Point2D> aPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 171       aData->attribute(attributeID()));
 172
 173   PartSet_WidgetPoint2D* that = (PartSet_WidgetPoint2D*) this;
 174   bool isBlocked = that->blockSignals(true);
 175   bool isImmutable = aPoint->setImmutable(true);
 176
 177   // if text is not empty then setValue will be ignored
 178   // so we should set the text at first
 179   aPoint->setText(myXSpin->hasVariable() ? myXSpin->text().toStdString() : "",
 180                   myYSpin->hasVariable() ? myYSpin->text().toStdString() : "");
 181   aPoint->setValue(!myXSpin->hasVariable() ? myXSpin->value() : aPoint->x(),
 182                    !myYSpin->hasVariable() ? myYSpin->value() : aPoint->y());
 183
 184   // after movement the solver will call the update event: optimization
 185   moveObject(myFeature);
 186   aPoint->setImmutable(isImmutable);
 187   that->blockSignals(isBlocked);
 188
 189   return true;
 190 }
 191
 192 bool PartSet_WidgetPoint2D::restoreValueCustom()
 193 {
 194   std::shared_ptr<ModelAPI_Data> aData = myFeature->data();
 195   std::shared_ptr<GeomDataAPI_Point2D> aPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 196       aData->attribute(attributeID()));
 197   QString aTextX = QString::fromStdString(aPoint->textX());
 198   QString aTextY = QString::fromStdString(aPoint->textY());
 199
 200   bool isDouble = false;
 201   double aVal = 0;
 202   if (aTextX.isEmpty()) {
 203     ModuleBase_Tools::setSpinValue(myXSpin, aPoint->x());
 204   } else {
 205     aVal = aTextX.toDouble(&isDouble);
 206     if (isDouble)
 207       ModuleBase_Tools::setSpinValue(myXSpin, aVal);
 208     else
 209       ModuleBase_Tools::setSpinText(myXSpin, aTextX);
 210   }
 211   if (aTextY.isEmpty()) {
 212     ModuleBase_Tools::setSpinValue(myYSpin, aPoint->y());
 213   } else {
 214     aVal = aTextY.toDouble(&isDouble);
 215     if (isDouble)
 216       ModuleBase_Tools::setSpinValue(myYSpin, aVal);
 217     else
 218       ModuleBase_Tools::setSpinText(myYSpin, aTextY);
 219   }
 220   //if (aTextX.empty() || aTextY.empty()) {
 221   //  ModuleBase_Tools::setSpinValue(myXSpin, aPoint->x());
 222   //  ModuleBase_Tools::setSpinValue(myYSpin, aPoint->y());
 223   //} else {
 224   //  ModuleBase_Tools::setSpinText(myXSpin, QString::fromStdString(aTextX));
 225   //  ModuleBase_Tools::setSpinText(myYSpin, QString::fromStdString(aTextY));
 226   //}
 227   return true;
 228 }
 229
 230 QList<QWidget*> PartSet_WidgetPoint2D::getControls() const
 231 {
 232   QList<QWidget*> aControls;
 233   aControls.append(myXSpin);
 234   aControls.append(myYSpin);
 235   return aControls;
 236 }
 237
 238
 239 void PartSet_WidgetPoint2D::activateCustom()
 240 {
 241   ModuleBase_IViewer* aViewer = myWorkshop->viewer();
 242   connect(aViewer, SIGNAL(mouseMove(ModuleBase_IViewWindow*, QMouseEvent*)),
 243           this, SLOT(onMouseMove(ModuleBase_IViewWindow*, QMouseEvent*)));
 244   connect(aViewer, SIGNAL(mouseRelease(ModuleBase_IViewWindow*, QMouseEvent*)),
 245           this, SLOT(onMouseRelease(ModuleBase_IViewWindow*, QMouseEvent*)));
 246
 247   QIntList aModes;
 248   aModes << TopAbs_VERTEX;
 249   aModes << TopAbs_EDGE;
 250   myWorkshop->activateSubShapesSelection(aModes);
 251 }
 252
 253 void PartSet_WidgetPoint2D::deactivate()
 254 {
 255   ModuleBase_ModelWidget::deactivate();
 256   ModuleBase_IViewer* aViewer = myWorkshop->viewer();
 257   disconnect(aViewer, SIGNAL(mouseMove(ModuleBase_IViewWindow*, QMouseEvent*)),
 258              this, SLOT(onMouseMove(ModuleBase_IViewWindow*, QMouseEvent*)));
 259   disconnect(aViewer, SIGNAL(mouseRelease(ModuleBase_IViewWindow*, QMouseEvent*)),
 260              this, SLOT(onMouseRelease(ModuleBase_IViewWindow*, QMouseEvent*)));
 261
 262   myWorkshop->deactivateSubShapesSelection();
 263 }
 264
 265 bool PartSet_WidgetPoint2D::getPoint2d(const Handle(V3d_View)& theView,
 266                                        const TopoDS_Shape& theShape,
 267                                        double& theX, double& theY) const
 268 {
 269   if (!theShape.IsNull()) {
 270     if (theShape.ShapeType() == TopAbs_VERTEX) {
 271       const TopoDS_Vertex& aVertex = TopoDS::Vertex(theShape);
 272       if (!aVertex.IsNull()) {
 273         // A case when point is taken from existing vertex
 274         gp_Pnt aPoint = BRep_Tool::Pnt(aVertex);
 275         PartSet_Tools::convertTo2D(aPoint, mySketch, theView, theX, theY);
 276         return true;
 277       }
 278     }
 279   }
 280   return false;
 281 }
 282
 283 void PartSet_WidgetPoint2D::setConstraintWith(const ObjectPtr& theObject)
 284 {
 285   // Create point-edge coincedence
 286   FeaturePtr aFeature = mySketch->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 287   std::shared_ptr<ModelAPI_Data> aData = aFeature->data();
 288
 289   std::shared_ptr<ModelAPI_AttributeRefAttr> aRef1 = std::dynamic_pointer_cast<
 290       ModelAPI_AttributeRefAttr>(aData->attribute(SketchPlugin_Constraint::ENTITY_A()));
 291   AttributePtr aThisAttr = feature()->data()->attribute(attributeID());
 292   std::shared_ptr<GeomDataAPI_Point2D> aThisPoint =
 293     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aThisAttr);
 294   aRef1->setAttr(aThisPoint);
 295
 296   std::shared_ptr<ModelAPI_AttributeRefAttr> aRef2 = std::dynamic_pointer_cast<
 297       ModelAPI_AttributeRefAttr>(aData->attribute(SketchPlugin_Constraint::ENTITY_B()));
 298   aRef2->setObject(theObject);
 299
 300   aFeature->execute();
 301 }
 302
 303 void PartSet_WidgetPoint2D::onMouseRelease(ModuleBase_IViewWindow* theWnd, QMouseEvent* theEvent)
 304 {
 305   // the contex menu release by the right button should not be processed by this widget
 306   if (theEvent->button() != Qt::LeftButton)
 307     return;
 308
 309   ModuleBase_ISelection* aSelection = myWorkshop->selection();
 310   Handle(V3d_View) aView = theWnd->v3dView();
 311   // TODO: This fragment doesn't work because bug in OCC Viewer. It can be used after fixing.
 312   NCollection_List<TopoDS_Shape> aShapes;
 313   std::list<ObjectPtr> aObjects;
 314   aSelection->selectedShapes(aShapes, aObjects);
 315   // if we have selection
 316   if (aShapes.Extent() > 0) {
 317     TopoDS_Shape aShape = aShapes.First();
 318     ObjectPtr aObject = aObjects.front();
 319     FeaturePtr aSelectedFeature = ModelAPI_Feature::feature(aObject);
 320     bool anExternal = false;
 321     if (aSelectedFeature.get() != NULL) {
 322       std::shared_ptr<SketchPlugin_Feature> aSPFeature =
 323               std::dynamic_pointer_cast<SketchPlugin_Feature>(aSelectedFeature);
 324       if ((!aSPFeature) && (!aShape.IsNull())) {
 325         anExternal = true;
 326         ResultPtr aFixedObject = PartSet_Tools::findFixedObjectByExternal(aShape, aObject, mySketch);
 327         if (!aFixedObject.get())
 328           aObject = PartSet_Tools::createFixedObjectByExternal(aShape, aObject, mySketch);
 329
 330         double aX, aY;
 331         if (getPoint2d(aView, aShape, aX, aY) && isFeatureContainsPoint(myFeature, aX, aY)) {
 332           // do not create a constraint to the point, which already used by the feature
 333           // if the feature contains the point, focus is not switched
 334           setPoint(aX, aY);
 335         }
 336         else {
 337           if (getPoint2d(aView, aShape, aX, aY))
 338             setPoint(aX, aY);
 339           bool anOrphanPoint = isOrphanPoint(aSelectedFeature, mySketch);
 340           setConstraintWith(aObject);
 341           if (!anOrphanPoint)
 342             emit vertexSelected();
 343           emit focusOutWidget(this);
 344         }
 345       }
 346     }
 347     if (!anExternal) {
 348       double aX, aY;
 349       bool isProcessed = false;
 350       if (getPoint2d(aView, aShape, aX, aY) && isFeatureContainsPoint(myFeature, aX, aY)) {
 351         // when the point is selected, the coordinates of the point should be set into the attribute
 352         // if the feature contains the point, focus is not switched
 353         setPoint(aX, aY);
 354       }
 355       else {
 356         bool anOrphanPoint = isOrphanPoint(aSelectedFeature, mySketch);
 357         // do not set a coincidence constraint in the attribute if the feature contains a point
 358         // with the same coordinates. It is important for line creation in order to do not set
 359         // the same constraints for the same points, oterwise the result line has zero length.
 360         if (getPoint2d(aView, aShape, aX, aY)) {
 361           setPoint(aX, aY);
 362           PartSet_Tools::setConstraints(mySketch, feature(), attributeID(), aX, aY);
 363         }
 364         else if (aShape.ShapeType() == TopAbs_EDGE) {
 365           if (MyFeaturesForCoincedence.contains(myFeature->getKind().c_str()))
 366             setConstraintWith(aObject);
 367         }
 368         // it is important to perform updateObject() in order to the current value is
 369         // processed by Sketch Solver. Test case: line is created from a previous point
 370         // to some distance, but in the area of the highlighting of the point. Constraint
 371         // coincidence is created, after the solver is performed, the distance between the
 372         // points of the line becomes less than the tolerance. Validator of the line returns
 373         // false, the line will be aborted, but sketch stays valid.
 374         updateObject(feature());
 375         if (!anOrphanPoint)
 376           emit vertexSelected();
 377         emit focusOutWidget(this);
 378       }
 379     }
 380   }
 381   // End of Bug dependent fragment
 382   else {
 383     // A case when point is taken from mouse event
 384     gp_Pnt aPoint = PartSet_Tools::convertClickToPoint(theEvent->pos(), theWnd->v3dView());
 385     double aX, anY;
 386     PartSet_Tools::convertTo2D(aPoint, mySketch, aView, aX, anY);
 387
 388     // if the feature contains the point, focus is not switched
 389     if (!setPoint(aX, anY) || isFeatureContainsPoint(myFeature, aX, anY))
 390       return;
 391
 392     /// Start alternative code
 393     //std::shared_ptr<GeomDataAPI_Point2D> aFeaturePoint = std::dynamic_pointer_cast<
 394     //    GeomDataAPI_Point2D>(feature()->data()->attribute(attributeID()));
 395     //QList<FeaturePtr> aIgnore;
 396     //aIgnore.append(feature());
 397
 398     //double aTolerance = aView->Convert(7);
 399     //std::shared_ptr<GeomDataAPI_Point2D> aAttrPnt =
 400     //  PartSet_Tools::findAttributePoint(mySketch, aX, anY, aTolerance, aIgnore);
 401     //if (aAttrPnt.get() != NULL) {
 402     //  aFeaturePoint->setValue(aAttrPnt->pnt());
 403     //  PartSet_Tools::createConstraint(mySketch, aAttrPnt, aFeaturePoint);
 404     //  emit vertexSelected();
 405     //}
 406     /// End alternative code
 407     emit focusOutWidget(this);
 408   }
 409 }
 410
 411
 412 void PartSet_WidgetPoint2D::onMouseMove(ModuleBase_IViewWindow* theWnd, QMouseEvent* theEvent)
 413 {
 414   if (isEditingMode())
 415     return;
 416
 417   gp_Pnt aPoint = PartSet_Tools::convertClickToPoint(theEvent->pos(), theWnd->v3dView());
 418
 419   double aX, anY;
 420   PartSet_Tools::convertTo2D(aPoint, mySketch, theWnd->v3dView(), aX, anY);
 421   // we need to block the value state change
 422   bool isBlocked = blockValueState(true);
 423   setPoint(aX, anY);
 424   blockValueState(isBlocked);
 425   setValueState(ModifiedInViewer);
 426 }
 427
 428 double PartSet_WidgetPoint2D::x() const
 429 {
 430   return myXSpin->value();
 431 }
 432
 433 double PartSet_WidgetPoint2D::y() const
 434 {
 435   return myYSpin->value();
 436 }
 437
 438
 439 bool PartSet_WidgetPoint2D::isFeatureContainsPoint(const FeaturePtr& theFeature,
 440                                                    double theX, double theY)
 441 {
 442   bool aPointIsFound = false;
 443   AttributePtr aWidgetAttribute = myFeature->attribute(attributeID());
 444
 445   std::shared_ptr<GeomAPI_Pnt2d> aPnt2d =
 446                                     std::shared_ptr<GeomAPI_Pnt2d>(new GeomAPI_Pnt2d(theX, theY));
 447   std::list<AttributePtr> anAttributes =
 448                                 myFeature->data()->attributes(GeomDataAPI_Point2D::typeId());
 449   std::list<AttributePtr>::iterator anIter = anAttributes.begin();
 450   for(; anIter != anAttributes.end() && !aPointIsFound; anIter++) {
 451     AttributePoint2DPtr aPoint2DAttribute =
 452       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(*anIter);
 453     if (aPoint2DAttribute == aWidgetAttribute)
 454       continue;
 455     if (aPoint2DAttribute.get() && aPoint2DAttribute->isInitialized()) {
 456       aPointIsFound = aPoint2DAttribute->pnt()->isEqual(aPnt2d);
 457     }
 458   }
 459   return aPointIsFound;
 460 }
 461
 462 /*void PartSet_WidgetPoint2D::onValuesChanged()
 463 {
 464   emit valuesChanged();
 465 }*/
 466
 467 bool PartSet_WidgetPoint2D::processEnter()
 468 {
 469   bool isModified = myXSpin->isModified() || myYSpin->isModified();
 470   if (isModified) {
 471     bool isXModified = myXSpin->isModified();
 472     emit valuesChanged();
 473     //onValuesChanged();
 474     myXSpin->clearModified();
 475     myYSpin->clearModified();
 476     if (isXModified)
 477       myXSpin->selectAll();
 478     else
 479       myYSpin->selectAll();
 480   }
 481   return isModified;
 482 }
 483
 484 bool PartSet_WidgetPoint2D::isOrphanPoint(const FeaturePtr& theFeature,
 485                                           const CompositeFeaturePtr& theSketch)
 486 {
 487   bool anOrphanPoint = false;
 488   if (theFeature.get()) {
 489     std::shared_ptr<GeomDataAPI_Point2D> aPointAttr;
 490     std::string aFeatureKind = theFeature->getKind();
 491     if (aFeatureKind == SketchPlugin_Point::ID())
 492       aPointAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 493                                        theFeature->attribute(SketchPlugin_Point::COORD_ID()));
 494     else if (aFeatureKind == SketchPlugin_Circle::ID())
 495       aPointAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 496                                        theFeature->attribute(SketchPlugin_Circle::CENTER_ID()));
 497
 498     else if (aFeatureKind == SketchPlugin_Arc::ID())
 499       aPointAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 500                                        theFeature->attribute(SketchPlugin_Arc::CENTER_ID()));
 501
 502     if (aPointAttr.get()) {
 503       std::shared_ptr<GeomAPI_Pnt2d> aPoint = aPointAttr->pnt();
 504       FeaturePtr aCoincidence = PartSet_Tools::findFirstCoincidence(theFeature, aPoint);
 505       anOrphanPoint = true;
 506       // if there is at least one concident line to the point, the point is not an orphant
 507       if (aCoincidence.get()) {
 508         QList<FeaturePtr> aCoinsideLines;
 509         PartSet_Tools::findCoincidences(aCoincidence, aCoinsideLines,
 510                                         SketchPlugin_ConstraintCoincidence::ENTITY_A());
 511         PartSet_Tools::findCoincidences(aCoincidence, aCoinsideLines,
 512                                         SketchPlugin_ConstraintCoincidence::ENTITY_B());
 513         QList<FeaturePtr>::const_iterator anIt = aCoinsideLines.begin(),
 514                                           aLast = aCoinsideLines.end();
 515         for (; anIt != aLast && anOrphanPoint; anIt++) {
 516           anOrphanPoint = (*anIt)->getKind() != SketchPlugin_Line::ID();
 517         }
 518       }
 519     }
 520   }
 521   return anOrphanPoint;
 522 }