src/ModuleBase/ModuleBase_ResultPrs.cpp

   1 // Copyright (C) 2014-2019  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #include "ModuleBase_ResultPrs.h"
  21 #include "ModuleBase_IViewer.h"
  22
  23 #include <GeomAPI_PlanarEdges.h>
  24
  25 #include <ModelAPI_Events.h>
  26 #include <ModelAPI_Tools.h>
  27 #include <ModelAPI_ResultConstruction.h>
  28 #include <ModelAPI_ResultBody.h>
  29 #include <ModelAPI_AttributeIntArray.h>
  30
  31 #include "ModuleBase_Tools.h"
  32 #include "ModuleBase_BRepOwner.h"
  33
  34 #include <Events_InfoMessage.h>
  35 #include <Events_Loop.h>
  36
  37 #include <AIS_ColoredDrawer.hxx>
  38 #include <AIS_InteractiveContext.hxx>
  39 #include <AIS_Selection.hxx>
  40 #include <BOPTools_AlgoTools3D.hxx>
  41 #include <BRep_Builder.hxx>
  42 #include <Graphic3d_AspectMarker3d.hxx>
  43 #include <Prs3d_Drawer.hxx>
  44 #include <Prs3d.hxx>
  45 #include <Prs3d_PointAspect.hxx>
  46 #include <Prs3d_IsoAspect.hxx>
  47 #include <Prs3d_ShadingAspect.hxx>
  48 #include <Prs3d_PlaneAspect.hxx>
  49 #include <SelectMgr_SequenceOfOwner.hxx>
  50 #include <SelectMgr_EntityOwner.hxx>
  51 #include <SelectMgr_SelectionManager.hxx>
  52 #include <StdPrs_WFShape.hxx>
  53 #include <StdPrs_ShadedShape.hxx>
  54 #include <StdSelect_BRepSelectionTool.hxx>
  55 #include <TColStd_ListIteratorOfListOfInteger.hxx>
  56 #include <TopExp_Explorer.hxx>
  57 #include <TopoDS.hxx>
  58 #include <TopoDS_Builder.hxx>
  59
  60 //*******************************************************************************************
  61
  62 IMPLEMENT_STANDARD_RTTIEXT(ModuleBase_ResultPrs, ViewerData_AISShape);
  63
  64
  65
  66 //********************************************************************
  67 ModuleBase_ResultPrs::ModuleBase_ResultPrs(ResultPtr theResult)
  68   : ViewerData_AISShape(TopoDS_Shape()), myResult(theResult), myAdditionalSelectionPriority(0),
  69   myTransparency(1), myIsSubstituted(false)
  70 {
  71   std::shared_ptr<GeomAPI_Shape> aShapePtr = ModelAPI_Tools::shape(theResult);
  72   TopoDS_Shape aShape = aShapePtr->impl<TopoDS_Shape>();
  73   Set(aShape);
  74
  75   // Activate individual repaintng if this is a part of compsolid
  76   ResultBodyPtr aResOwner = ModelAPI_Tools::bodyOwner(myResult);
  77   SetAutoHilight(aResOwner.get() == NULL);
  78
  79   // Set own free boundaries aspect in order to have free
  80   // and unfree boundaries with different colors
  81   Handle(Prs3d_Drawer) aDrawer = Attributes();
  82   //aDrawer->SetTypeOfDeflection(Aspect_TOD_ABSOLUTE);
  83   aDrawer->SetUnFreeBoundaryAspect(
  84     new Prs3d_LineAspect(Quantity_NOC_YELLOW, Aspect_TOL_SOLID, 1));
  85   aDrawer->SetFreeBoundaryAspect(new Prs3d_LineAspect(Quantity_NOC_GREEN, Aspect_TOL_SOLID, 1));
  86   aDrawer->SetFaceBoundaryAspect(new Prs3d_LineAspect(Quantity_NOC_BLACK, Aspect_TOL_SOLID, 1));
  87
  88   Quantity_Color aColor;
  89   Color(aColor);
  90
  91   std::vector<int> aIsoValues;
  92   bool isIsoVisible;
  93   ModelAPI_Tools::getIsoLines(myResult, isIsoVisible, aIsoValues);
  94   if (isIsoVisible) {
  95     if (aIsoValues.size() == 0) {
  96       aIsoValues.push_back(1);
  97       aIsoValues.push_back(1);
  98     }
  99   }
 100   else {
 101     aIsoValues.push_back(0);
 102     aIsoValues.push_back(0);
 103   }
 104   myUIsoAspect = new Prs3d_IsoAspect(aColor, Aspect_TOL_SOLID, 1, aIsoValues[0]);
 105   myVIsoAspect = new Prs3d_IsoAspect(aColor, Aspect_TOL_SOLID, 1, aIsoValues[1]);
 106   aDrawer->SetUIsoAspect(myUIsoAspect);
 107   aDrawer->SetVIsoAspect(myVIsoAspect);
 108
 109   if (aDrawer->HasOwnPointAspect())
 110     aDrawer->PointAspect()->SetTypeOfMarker(Aspect_TOM_PLUS);
 111   else
 112     aDrawer->SetPointAspect(new Prs3d_PointAspect(Aspect_TOM_PLUS, Quantity_NOC_YELLOW, 1.));
 113
 114   aDrawer = DynamicHilightAttributes();
 115   if (aDrawer.IsNull()) {
 116     if (!ModuleBase_IViewer::DefaultHighlightDrawer.IsNull()) {
 117       aDrawer = new Prs3d_Drawer(*ModuleBase_IViewer::DefaultHighlightDrawer);
 118       aDrawer->SetUIsoAspect(myUIsoAspect);
 119       aDrawer->SetVIsoAspect(myVIsoAspect);
 120       SetDynamicHilightAttributes(aDrawer);
 121     }
 122   }
 123   //if (!aDrawer.IsNull())
 124   //  aDrawer->SetTypeOfDeflection(Aspect_TOD_ABSOLUTE);
 125
 126   myHiddenSubShapesDrawer = new AIS_ColoredDrawer(myDrawer);
 127   Handle(Prs3d_ShadingAspect) aShadingAspect = new Prs3d_ShadingAspect();
 128   aShadingAspect->SetMaterial(Graphic3d_NOM_BRASS); //default value of context material
 129   aShadingAspect->Aspect()->SetEdgeColor(Quantity_NOC_BLACK);
 130   myHiddenSubShapesDrawer->SetShadingAspect(aShadingAspect);
 131
 132   ModuleBase_Tools::setPointBallHighlighting(this);
 133
 134   // Define colors for wireframe mode
 135   setEdgesDefaultColor();
 136 }
 137
 138 //********************************************************************
 139 void ModuleBase_ResultPrs::setAdditionalSelectionPriority(const int thePriority)
 140 {
 141   myAdditionalSelectionPriority = thePriority;
 142 }
 143
 144 //********************************************************************
 145 void ModuleBase_ResultPrs::SetColor (const Quantity_Color& theColor)
 146 {
 147   ViewerData_AISShape::SetColor(theColor);
 148   myHiddenSubShapesDrawer->ShadingAspect()->SetColor (theColor, myCurrentFacingModel);
 149   setEdgesDefaultColor();
 150   myUIsoAspect->SetColor(theColor);
 151   myVIsoAspect->SetColor(theColor);
 152 }
 153
 154 void ModuleBase_ResultPrs::setEdgesDefaultColor()
 155 {
 156   if (myResult.get()) {
 157     AttributeIntArrayPtr aColorAttr = myResult->data()->intArray(ModelAPI_Result::COLOR_ID());
 158     bool aHasColor = aColorAttr.get() && aColorAttr->isInitialized();
 159
 160     Handle(Prs3d_Drawer) aDrawer = Attributes();
 161     aDrawer->SetFaceBoundaryDraw(Standard_True);
 162     aDrawer->FaceBoundaryAspect()->SetColor(Quantity_NOC_BLACK);
 163
 164     if (!aHasColor) {
 165       aDrawer->UnFreeBoundaryAspect()->SetColor(Quantity_NOC_YELLOW);
 166       aDrawer->FreeBoundaryAspect()->SetColor(Quantity_NOC_GREEN);
 167       aDrawer->WireAspect()->SetColor(Quantity_NOC_RED);
 168
 169       aDrawer->SetUnFreeBoundaryDraw(Standard_True);
 170       aDrawer->SetFreeBoundaryDraw(Standard_True);
 171       aDrawer->SetWireDraw(Standard_True);
 172     }
 173   }
 174 }
 175
 176
 177 //********************************************************************
 178 void ModuleBase_ResultPrs::setSubShapeHidden(const TopoDS_ListOfShape& theShapes)
 179 {
 180   bool isModified = false;
 181
 182   TopoDS_Compound aCompound;
 183   BRep_Builder aBBuilder;
 184   aBBuilder.MakeCompound (aCompound);
 185
 186   myHiddenSubShapes = theShapes;
 187   collectSubShapes(aBBuilder, aCompound, myOriginalShape, myHiddenSubShapes);
 188   myVisibleCompound = aCompound;
 189
 190   aBBuilder.MakeCompound (aCompound);
 191   TopoDS_ListOfShape::Iterator aIt(myHiddenSubShapes);
 192   for (; aIt.More(); aIt.Next()) {
 193     aBBuilder.Add(aCompound, aIt.Value());
 194   }
 195   myHiddenCompound = aCompound;
 196 }
 197
 198 //********************************************************************
 199 bool ModuleBase_ResultPrs::isSubShapeHidden(const TopoDS_Shape& theShape)
 200 {
 201   if (theShape.IsNull() || theShape.ShapeType() != TopAbs_FACE) // only face shape can be hidden
 202     return false;
 203
 204   // orientation of parameter shape(come from selection) may be wrong, check isEqual() to be sure
 205   TopoDS_ListOfShape::Iterator aShapeIt(myHiddenSubShapes);
 206   for (; aShapeIt.More(); aShapeIt.Next()) {
 207     if (theShape.IsSame(aShapeIt.Value()))
 208       return true;
 209   }
 210
 211   return true;
 212 }
 213
 214 //********************************************************************
 215 bool ModuleBase_ResultPrs::hasSubShapeVisible(
 216   const TopoDS_ListOfShape& theShapesToSkip)
 217 {
 218   TopoDS_Compound aCompound;
 219   BRep_Builder aBuilder;
 220   aBuilder.MakeCompound (aCompound);
 221   TopoDS_ListOfShape aShapesToSkip;
 222   TopoDS_ListOfShape aHiddenCopy(myHiddenSubShapes);
 223   aShapesToSkip.Append(aHiddenCopy);
 224   for (TopoDS_ListOfShape::Iterator anIt(theShapesToSkip); anIt.More(); anIt.Next())
 225     aShapesToSkip.Append(anIt.Value());
 226
 227   collectSubShapes(aBuilder, aCompound, myOriginalShape, aShapesToSkip);
 228   return !BOPTools_AlgoTools3D::IsEmptyShape(aCompound);
 229 }
 230
 231 //********************************************************************
 232 bool ModuleBase_ResultPrs::setHiddenSubShapeTransparency(double theTransparency)
 233 {
 234   if (myTransparency == theTransparency || theTransparency > 1 || theTransparency < 0)
 235     return false;
 236
 237   myTransparency = theTransparency;
 238   myHiddenSubShapesDrawer->ShadingAspect()->SetTransparency (theTransparency, myCurrentFacingModel);
 239   return true;
 240 }
 241
 242 //********************************************************************
 243 void ModuleBase_ResultPrs::Compute(
 244           const Handle(PrsMgr_PresentationManager3d)& thePresentationManager,
 245           const Handle(Prs3d_Presentation)& thePresentation,
 246           const Standard_Integer theMode)
 247 {
 248   std::shared_ptr<GeomAPI_Shape> aShapePtr = myResult->shape();
 249   bool aReadyToDisplay = aShapePtr.get();
 250   if (aReadyToDisplay) {
 251     myOriginalShape = aShapePtr->impl<TopoDS_Shape>();
 252     if (myHiddenSubShapes.IsEmpty() || myOriginalShape.ShapeType() > TopAbs_FACE ) {
 253       if (!myOriginalShape.IsNull()) {
 254         Set(myOriginalShape);
 255         myIsSubstituted = false;
 256       }
 257     }
 258     else { // convert shape into SHELL
 259       bool isEmptyShape = BOPTools_AlgoTools3D::IsEmptyShape(myVisibleCompound);
 260       Set(myVisibleCompound);
 261       myIsSubstituted = true;
 262       if (isEmptyShape)
 263         aReadyToDisplay = false;
 264     }
 265   }
 266   // change deviation coefficient to provide more precise circle
 267   ModuleBase_Tools::setDefaultDeviationCoefficient(Shape(), DynamicHilightAttributes());
 268   ModuleBase_Tools::setDefaultDeviationCoefficient(Shape(), Attributes());
 269   try {
 270     AIS_Shape::Compute(thePresentationManager, thePresentation, theMode);
 271   }
 272   catch (...) {
 273     return;
 274   }
 275
 276   // visualize hidden sub-shapes transparent
 277   if (myResult.get()) {
 278     if (myTransparency < 1 && !myHiddenSubShapes.IsEmpty())
 279     {
 280       StdPrs_ShadedShape::Add(thePresentation, myHiddenCompound, myHiddenSubShapesDrawer);
 281       aReadyToDisplay = true;
 282     }
 283
 284     if (!aReadyToDisplay) {
 285       Events_InfoMessage("ModuleBase_ResultPrs",
 286         "An empty AIS presentation: ModuleBase_ResultPrs").send();
 287       static const Events_ID anEvent = Events_Loop::eventByName(EVENT_EMPTY_AIS_PRESENTATION);
 288       ModelAPI_EventCreator::get()->sendUpdated(myResult, anEvent);
 289     }
 290   }
 291 }
 292
 293 //********************************************************************
 294 void ModuleBase_ResultPrs::collectSubShapes(BRep_Builder& theBuilder,
 295   TopoDS_Shape& theCompound, const TopoDS_Shape& theShape,
 296   const TopoDS_ListOfShape& theHiddenSubShapes)
 297 {
 298   switch (theShape.ShapeType()) {
 299     case TopAbs_COMPSOLID:
 300     case TopAbs_COMPOUND: {
 301       for (TopoDS_Iterator aChildIter (theShape); aChildIter.More(); aChildIter.Next())
 302         collectSubShapes(theBuilder, theCompound, aChildIter.Value(), theHiddenSubShapes);
 303     }
 304     break;
 305     case TopAbs_SOLID:
 306     case TopAbs_SHELL: {
 307       for (TopExp_Explorer anExp (theShape, TopAbs_FACE); anExp.More(); anExp.Next()) {
 308         collectSubShapes(theBuilder, theCompound, anExp.Current(), theHiddenSubShapes);
 309       }
 310     }
 311     break;
 312     case TopAbs_WIRE: {
 313       for (TopExp_Explorer anExp (theShape, TopAbs_EDGE); anExp.More(); anExp.Next()) {
 314         collectSubShapes(theBuilder, theCompound, anExp.Current(), theHiddenSubShapes);
 315       }
 316     }
 317     break;
 318     case TopAbs_FACE: {
 319       if (theHiddenSubShapes.Contains(theShape))
 320         return; // remove hidden shape
 321       theBuilder.Add(theCompound, theShape);
 322     }
 323     break;
 324     case TopAbs_EDGE:
 325     case TopAbs_VERTEX: {
 326       theBuilder.Add(theCompound, theShape);
 327     }
 328     default:
 329       break;
 330   }
 331 }
 332
 333 //********************************************************************
 334 void ModuleBase_ResultPrs::ComputeSelection(const Handle(SelectMgr_Selection)& aSelection,
 335                                             const Standard_Integer theMode)
 336 {
 337   if (appendVertexSelection(aSelection, theMode))
 338     return;
 339
 340   if (theMode > TopAbs_SHAPE) {
 341     // In order to avoid using custom selection modes
 342     if (theMode == ModuleBase_ResultPrs::Sel_Result) {
 343       AIS_Shape::ComputeSelection(aSelection, TopAbs_COMPOUND);
 344     }
 345     return;
 346   }
 347
 348   // TODO: OCCT issue should be created for the COMPOUND processing
 349   // before it is fixed, the next workaround in necessary
 350   if (theMode == AIS_Shape::SelectionMode(TopAbs_COMPOUND)) {
 351     const TopoDS_Shape& aShape = Shape();
 352     TopExp_Explorer aCompExp(aShape, TopAbs_COMPOUND);
 353     // do not activate in compound mode shapes which do not contain compounds
 354     if (!aCompExp.More())
 355       return;
 356   }
 357
 358   // bug 2110: if (theMode == AIS_Shape::SelectionMode(TopAbs_COMPSOLID)) {
 359   //  // Limit selection area only by actual object (Shape)
 360   //  ResultCompSolidPtr aCompSolid = ModelAPI_Tools::compSolidOwner(myResult);
 361   //  if (aCompSolid.get()) {
 362   //    std::shared_ptr<GeomAPI_Shape> aShapePtr = ModelAPI_Tools::shape(aCompSolid);
 363   //    if (aShapePtr.get()) {
 364   //      TopoDS_Shape aShape = aShapePtr->impl<TopoDS_Shape>();
 365   //   int aPriority = StdSelect_BRepSelectionTool::GetStandardPriority(aShape, TopAbs_COMPSOLID);
 366   //     /// It is important to have priority for the shape of comp solid result less than priority
 367   //      /// for the presentation shape which is a sub-result.
 368   //      /// Reason is to select the sub-objects before: #1592
 369   //      aPriority = aPriority - 1;
 370   //      double aDeflection = Prs3d::GetDeflection(aShape, myDrawer);
 371
 372   //      Handle(ModuleBase_BRepOwner) aOwner = new ModuleBase_BRepOwner(aShape, aPriority);
 373   //      StdSelect_BRepSelectionTool::ComputeSensitive(aShape, aOwner, aSelection,
 374   //        aDeflection, myDrawer->HLRAngle(), 9, 500);
 375
 376   //      for (aSelection->Init(); aSelection->More(); aSelection->Next()) {
 377   //        Handle(SelectMgr_EntityOwner) anOwner =
 378   //          Handle(SelectMgr_EntityOwner)
 379   //          ::DownCast(aSelection->Sensitive()->BaseSensitive()->OwnerId());
 380   //        anOwner->Set(this);
 381   //      }
 382   //      return;
 383   //    }
 384   //  }
 385   //}
 386   AIS_Shape::ComputeSelection(aSelection, theMode);
 387
 388   if (myAdditionalSelectionPriority > 0) {
 389     NCollection_Vector<Handle(SelectMgr_SensitiveEntity)> anEntities = aSelection->Entities();
 390     for (NCollection_Vector<Handle(SelectMgr_SensitiveEntity)>::Iterator anIt(anEntities);
 391          anIt.More();
 392          anIt.Next()) {
 393       Handle(SelectMgr_SensitiveEntity) anEntity = anIt.Value();
 394       Handle(SelectBasics_EntityOwner) aBasicsOwner = anEntity->BaseSensitive()->OwnerId();
 395       if (!aBasicsOwner.IsNull())
 396         aBasicsOwner->Set(aBasicsOwner->Priority() + myAdditionalSelectionPriority);
 397     }
 398   }
 399 }
 400
 401 //********************************************************************
 402 bool ModuleBase_ResultPrs::appendVertexSelection(const Handle(SelectMgr_Selection)& aSelection,
 403                                                  const Standard_Integer theMode)
 404 {
 405   if (Shape().ShapeType() == TopAbs_VERTEX) {
 406     const TopoDS_Shape& aShape = Shape();
 407
 408     int aPriority = StdSelect_BRepSelectionTool::GetStandardPriority(aShape, TopAbs_VERTEX);
 409     double aDeflection = Prs3d::GetDeflection(aShape, myDrawer);
 410
 411     /// The cause of this method is the last parameter of BRep owner setting into True.
 412     /// That means that owner should behave like it comes from decomposition. (In this case, OCCT
 413     /// visualizes it in Ring style) OCCT version is 7.0.0 with path for SHAPER module.
 414     Handle(StdSelect_BRepOwner) aOwner = new StdSelect_BRepOwner(aShape, aPriority, Standard_True);
 415     StdSelect_BRepSelectionTool::ComputeSensitive(aShape, aOwner, aSelection,
 416                                                   aDeflection, myDrawer->HLRAngle(), 9, 500);
 417
 418
 419     NCollection_Vector<Handle(SelectMgr_SensitiveEntity)> anEntities = aSelection->Entities();
 420     for (NCollection_Vector<Handle(SelectMgr_SensitiveEntity)>::Iterator anIt(anEntities);
 421          anIt.More();
 422          anIt.Next()) {
 423       Handle(SelectMgr_SensitiveEntity) anEntity = anIt.Value();
 424       Handle(SelectMgr_EntityOwner) anOwner =
 425         Handle(SelectMgr_EntityOwner)
 426         ::DownCast(anEntity->BaseSensitive()->OwnerId());
 427       anOwner->Set(this);
 428     }
 429
 430     return true;
 431   }
 432   return false;
 433 }
 434
 435 //********************************************************************
 436 void ModuleBase_ResultPrs::HilightSelected(const Handle(PrsMgr_PresentationManager3d)& thePM,
 437                                            const SelectMgr_SequenceOfOwner& theOwners)
 438 {
 439   Handle(SelectMgr_EntityOwner) anOwner;
 440   Handle(ModuleBase_BRepOwner) aCompOwner;
 441   for (int i = 1; i <= theOwners.Length(); i++) {
 442     anOwner = theOwners.Value(i);
 443     aCompOwner = Handle(ModuleBase_BRepOwner)::DownCast(anOwner);
 444     if (aCompOwner.IsNull()) {
 445       thePM->Color(anOwner->Selectable(), GetContext()->SelectionStyle());
 446     }
 447     else {
 448       TopoDS_Shape aShape = aCompOwner->Shape();
 449       Handle( Prs3d_Presentation ) aSelectionPrs = GetSelectPresentation( thePM );
 450       aSelectionPrs->Clear();
 451
 452       StdPrs_WFShape::Add(aSelectionPrs, aShape, myDrawer);
 453
 454       aSelectionPrs->SetDisplayPriority(9);
 455       aSelectionPrs->Highlight(GetContext()->SelectionStyle());
 456       aSelectionPrs->Display();
 457       thePM->Color(this, GetContext()->SelectionStyle());
 458     }
 459   }
 460 }
 461
 462 //********************************************************************
 463 void ModuleBase_ResultPrs::HilightOwnerWithColor(const Handle(PrsMgr_PresentationManager3d)& thePM,
 464                                                  const Handle(Prs3d_Drawer)& theStyle,
 465                                                  const Handle(SelectMgr_EntityOwner)& theOwner)
 466 {
 467   Handle(StdSelect_BRepOwner) aOwner = Handle(StdSelect_BRepOwner)::DownCast(theOwner);
 468   if (aOwner.IsNull())
 469     return;
 470
 471   TopoDS_Shape aShape = aOwner->Shape();
 472   if (!aShape.IsNull()) {
 473     thePM->Color(this, theStyle);
 474
 475     Handle( Prs3d_Presentation ) aHilightPrs = GetHilightPresentation( thePM );
 476     aHilightPrs->Clear();
 477
 478     StdPrs_WFShape::Add(aHilightPrs, aShape, myDrawer);
 479     aHilightPrs->Highlight(theStyle);
 480
 481     if (thePM->IsImmediateModeOn())
 482       thePM->AddToImmediateList(aHilightPrs);
 483   }
 484 }
 485
 486
 487 //********************************************************************
 488 void ModuleBase_ResultPrs::updateIsoLines()
 489 {
 490   std::vector<int> aIsoValues;
 491   bool isIsoVisible;
 492   ModelAPI_Tools::getIsoLines(myResult, isIsoVisible, aIsoValues);
 493   if (isIsoVisible) {
 494     if (aIsoValues.size() == 0) {
 495       aIsoValues.push_back(1);
 496       aIsoValues.push_back(1);
 497     }
 498   }
 499   else {
 500     if (aIsoValues.size() == 0) {
 501       aIsoValues.push_back(0);
 502       aIsoValues.push_back(0);
 503     }
 504     else {
 505       aIsoValues[0] = 0;
 506       aIsoValues[1] = 0;
 507     }
 508   }
 509   myUIsoAspect->SetNumber(aIsoValues[0]);
 510   myVIsoAspect->SetNumber(aIsoValues[1]);
 511 }