src/SketcherPrs/SketcherPrs_SymbolPrs.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
   2
   3 // File:        SketcherPrs_SymbolPrs.cpp
   4 // Created:     12 March 2015
   5 // Author:      Vitaly SMETANNIKOV
   6
   7 #include "SketcherPrs_SymbolPrs.h"
   8 #include "SketcherPrs_Tools.h"
   9 #include "SketcherPrs_PositionMgr.h"
  10
  11 #include <GeomAPI_Edge.h>
  12 #include <GeomAPI_Vertex.h>
  13 #include <GeomAPI_Curve.h>
  14
  15 #include <Events_Error.h>
  16
  17 #include <Graphic3d_ArrayOfSegments.hxx>
  18 #include <Graphic3d_BndBox4f.hxx>
  19
  20 #include <SelectMgr_Selection.hxx>
  21 #include <Select3D_SensitivePoint.hxx>
  22 #include <TopLoc_Location.hxx>
  23 #include <AIS_InteractiveContext.hxx>
  24 #include <V3d_Viewer.hxx>
  25 #include <Prs3d_Root.hxx>
  26 #include <Geom_CartesianPoint.hxx>
  27 #include <GeomAdaptor_Curve.hxx>
  28 #include <StdPrs_DeflectionCurve.hxx>
  29 #include <StdPrs_Point.hxx>
  30 #include <StdPrs_Curve.hxx>
  31
  32 #include <OpenGl_Element.hxx>
  33 #include <OpenGl_GraphicDriver.hxx>
  34 #include <OpenGl_Context.hxx>
  35 #include <OpenGl_View.hxx>
  36 #include <OpenGl_PointSprite.hxx>
  37 #include <OpenGl_VertexBuffer.hxx>
  38 #include <OpenGl_ShaderManager.hxx>
  39
  40 #ifdef WIN32
  41 # define FSEP "\\"
  42 #else
  43 # define FSEP "/"
  44 #endif
  45
  46 /// Step between icons
  47 static const double MyDist = 0.02;
  48
  49 /// Function to convert opengl data type
  50 GLenum toGlDataType (const Graphic3d_TypeOfData theType, GLint& theNbComp)
  51 {
  52   switch (theType) {
  53     case Graphic3d_TOD_USHORT:
  54       theNbComp = 1;
  55       return GL_UNSIGNED_SHORT;
  56     case Graphic3d_TOD_UINT:
  57       theNbComp = 1;
  58       return GL_UNSIGNED_INT;
  59     case Graphic3d_TOD_VEC2:
  60       theNbComp = 2;
  61       return GL_FLOAT;
  62     case Graphic3d_TOD_VEC3:
  63       theNbComp = 3;
  64       return GL_FLOAT;
  65     case Graphic3d_TOD_VEC4:
  66       theNbComp = 4;
  67       return GL_FLOAT;
  68     case Graphic3d_TOD_VEC4UB:
  69       theNbComp = 4;
  70       return GL_UNSIGNED_BYTE;
  71   }
  72   theNbComp = 0;
  73   return GL_NONE;
  74 }
  75
  76
  77 //*******************************************************************
  78 //! Auxiliary class for Vertex buffer with interleaved attributes.
  79 class SketcherPrs_VertexBuffer : public OpenGl_VertexBuffer
  80 {
  81
  82 public:
  83
  84   //! Create uninitialized VBO..
  85   //! \param theAttribs attributes
  86   //! \param theStride a flag
  87   SketcherPrs_VertexBuffer (const Graphic3d_Attribute* theAttribs,
  88                         const Standard_Integer     theStride)
  89   : Stride (theStride), NbAttributes(1)
  90   {
  91
  92     memcpy (Attribs, theAttribs, sizeof(Graphic3d_Attribute) * NbAttributes);
  93   }
  94
  95   //! Create uninitialized VBO.
  96   SketcherPrs_VertexBuffer (const Graphic3d_Buffer& theAttribs)
  97   : Stride (theAttribs.Stride), NbAttributes(1)
  98   {
  99     memcpy (Attribs, theAttribs.AttributesArray(), sizeof(Graphic3d_Attribute) * NbAttributes);
 100   }
 101
 102   /// Returns True if color attribute is defined
 103   virtual bool HasColorAttribute() const
 104   {
 105     for (Standard_Integer anAttribIter = 0; anAttribIter < NbAttributes; ++anAttribIter) {
 106       const Graphic3d_Attribute& anAttrib = Attribs[anAttribIter];
 107       if (anAttrib.Id == Graphic3d_TOA_COLOR) {
 108         return true;
 109       }
 110     }
 111     return false;
 112   }
 113
 114   /// Returns True if normal attribute is defined
 115   virtual bool HasNormalAttribute() const
 116   {
 117     for (Standard_Integer anAttribIter = 0; anAttribIter < NbAttributes; ++anAttribIter) {
 118       const Graphic3d_Attribute& anAttrib = Attribs[anAttribIter];
 119       if (anAttrib.Id == Graphic3d_TOA_NORM) {
 120         return true;
 121       }
 122     }
 123     return false;
 124   }
 125
 126   /// Bind position of the attribute
 127   /// \param theGlCtx OpenGl context
 128   virtual void BindPositionAttribute (const Handle(OpenGl_Context)& theGlCtx) const
 129   {
 130     if (!OpenGl_VertexBuffer::IsValid()) {
 131       return;
 132     }
 133
 134     OpenGl_VertexBuffer::Bind (theGlCtx);
 135     GLint aNbComp;
 136     const GLubyte* anOffset = OpenGl_VertexBuffer::myOffset;
 137     for (Standard_Integer anAttribIter = 0; anAttribIter < NbAttributes; ++anAttribIter) {
 138       const Graphic3d_Attribute& anAttrib = Attribs[anAttribIter];
 139       const GLenum   aDataType = toGlDataType (anAttrib.DataType, aNbComp);
 140       if (aDataType == GL_NONE) {
 141         continue;
 142       } else if (anAttrib.Id == Graphic3d_TOA_POS) {
 143         OpenGl_VertexBuffer::bindAttribute (theGlCtx, Graphic3d_TOA_POS, aNbComp, aDataType, Stride, anOffset);
 144         break;
 145       }
 146
 147       anOffset += Graphic3d_Attribute::Stride (anAttrib.DataType);
 148     }
 149   }
 150
 151   /// Bind all attributes
 152   /// \param theGlCtx OpenGl context
 153   virtual void BindAllAttributes (const Handle(OpenGl_Context)& theGlCtx) const
 154   {
 155     if (!OpenGl_VertexBuffer::IsValid())
 156       return;
 157
 158     OpenGl_VertexBuffer::Bind (theGlCtx);
 159     GLint aNbComp;
 160     const GLubyte* anOffset = OpenGl_VertexBuffer::myOffset;
 161     for (Standard_Integer anAttribIter = 0; anAttribIter < NbAttributes; ++anAttribIter)
 162     {
 163       const Graphic3d_Attribute& anAttrib = Attribs[anAttribIter];
 164       const GLenum   aDataType = toGlDataType (anAttrib.DataType, aNbComp);
 165       if (aDataType == GL_NONE)
 166         continue;
 167
 168       OpenGl_VertexBuffer::bindAttribute (theGlCtx, anAttrib.Id, aNbComp, aDataType, Stride, anOffset);
 169       anOffset += Graphic3d_Attribute::Stride (anAttrib.DataType);
 170     }
 171   }
 172
 173   /// Unbind all attributes
 174   /// \param theGlCtx OpenGl context
 175   virtual void UnbindAllAttributes (const Handle(OpenGl_Context)& theGlCtx) const
 176   {
 177     if (!OpenGl_VertexBuffer::IsValid())
 178       return;
 179     OpenGl_VertexBuffer::Unbind (theGlCtx);
 180
 181     for (Standard_Integer anAttribIter = 0; anAttribIter < NbAttributes; ++anAttribIter) {
 182       const Graphic3d_Attribute& anAttrib = Attribs[anAttribIter];
 183       OpenGl_VertexBuffer::unbindAttribute (theGlCtx, anAttrib.Id);
 184     }
 185   }
 186
 187 public:
 188
 189   /// Array of attributes
 190   Graphic3d_Attribute Attribs[1];
 191
 192   /// A flag
 193   Standard_Integer    Stride;
 194
 195   /// Number of attributes
 196   Standard_Integer NbAttributes;
 197 };
 198
 199 //**************************************************************
 200 //! Redefinition of OpenGl_Element
 201 class SketcherPrs_Element: public OpenGl_Element
 202 {
 203 public:
 204   /// Constructor
 205   /// \param theObj a presentation
 206   SketcherPrs_Element(const Handle(SketcherPrs_SymbolPrs)& theObj) :
 207   OpenGl_Element(), myObj(theObj) {}
 208
 209   /// Render the current presentation
 210   /// \param theWorkspace OpenGL workspace
 211   virtual void Render (const Handle(OpenGl_Workspace)& theWorkspace) const
 212   {
 213     if (!myObj.IsNull())
 214       myObj->Render(theWorkspace);
 215   }
 216
 217   /// Releases OpenGL resources
 218   /// \param theContext OpenGL context
 219   virtual void Release (OpenGl_Context* theContext)
 220   {
 221     if (!myObj.IsNull())
 222       myObj->Release(theContext);
 223   }
 224
 225 private:
 226   Handle(SketcherPrs_SymbolPrs) myObj;
 227 };
 228
 229
 230 //**************************************************************
 231 //! Definition of call back
 232 OpenGl_Element* SymbolPrsCallBack(const CALL_DEF_USERDRAW * theUserDraw)
 233 {
 234   Handle(SketcherPrs_SymbolPrs) anIObj = (SketcherPrs_SymbolPrs*)theUserDraw->Data;
 235   if (anIObj.IsNull()) {
 236     std::cout << "VUserDrawCallback error: null object passed, the custom scene element will not be rendered" << std::endl;
 237   }
 238   return new SketcherPrs_Element(anIObj);
 239 }
 240
 241
 242 //*****************************************************************************
 243 IMPLEMENT_STANDARD_HANDLE(SketcherPrs_SymbolPrs, AIS_InteractiveObject);
 244 IMPLEMENT_STANDARD_RTTIEXT(SketcherPrs_SymbolPrs, AIS_InteractiveObject);
 245
 246
 247 std::map<const char*, Handle(Image_AlienPixMap)> SketcherPrs_SymbolPrs::myIconsMap;
 248
 249
 250 SketcherPrs_SymbolPrs::SketcherPrs_SymbolPrs(ModelAPI_Feature* theConstraint,
 251                                              const std::shared_ptr<GeomAPI_Ax3>& thePlane)
 252  : AIS_InteractiveObject(), myConstraint(theConstraint), myPlane(thePlane)
 253 {
 254   SetAutoHilight(Standard_False);
 255 }
 256
 257 SketcherPrs_SymbolPrs::~SketcherPrs_SymbolPrs()
 258 {
 259   SketcherPrs_PositionMgr* aMgr = SketcherPrs_PositionMgr::get();
 260   aMgr->deleteConstraint(this);
 261 }
 262
 263 #ifdef _WINDOWS
 264 #pragma warning( disable : 4996 )
 265 #endif
 266
 267 Handle(Image_AlienPixMap) SketcherPrs_SymbolPrs::icon()
 268 {
 269   if (myIconsMap.count(iconName()) == 1) {
 270     return myIconsMap[iconName()];
 271   }
 272   char* aEnv = getenv("NEWGEOM_ROOT_DIR");
 273   if (aEnv != NULL) {
 274     TCollection_AsciiString aFile(aEnv);
 275     aFile+=FSEP;
 276     aFile+="resources";
 277     aFile += FSEP;
 278     aFile += iconName();
 279     Handle(Image_AlienPixMap) aPixMap = new Image_AlienPixMap();
 280     if (aPixMap->Load(aFile)) {
 281       myIconsMap[iconName()] = aPixMap;
 282       return aPixMap;
 283     }
 284   }
 285   static const char aMsg[] = "Error! constraint images are not found";
 286   cout<<aMsg<<endl;
 287   Events_Error::send(aMsg);
 288   myIconsMap[iconName()] = Handle(Image_AlienPixMap)();
 289   return Handle(Image_AlienPixMap)();
 290 }
 291
 292 void SketcherPrs_SymbolPrs::prepareAspect()
 293 {
 294   if (myAspect.IsNull()) {
 295     Handle(Image_AlienPixMap) aIcon = icon();
 296     if (aIcon.IsNull())
 297       myAspect = new Graphic3d_AspectMarker3d();
 298     else
 299       myAspect = new Graphic3d_AspectMarker3d(aIcon);
 300   }
 301 }
 302
 303 void SketcherPrs_SymbolPrs::addLine(const Handle(Graphic3d_Group)& theGroup, std::string theAttrName) const
 304 {
 305   ObjectPtr aObj = SketcherPrs_Tools::getResult(myConstraint, theAttrName);
 306   std::shared_ptr<GeomAPI_Shape> aLine = SketcherPrs_Tools::getShape(aObj);
 307   if (aLine.get() == NULL)
 308     return;
 309   std::shared_ptr<GeomAPI_Edge> aEdge = std::shared_ptr<GeomAPI_Edge>(new GeomAPI_Edge(aLine));
 310
 311   std::shared_ptr<GeomAPI_Pnt> aPnt1 = aEdge->firstPoint();
 312   std::shared_ptr<GeomAPI_Pnt> aPnt2 = aEdge->lastPoint();
 313
 314   Handle(Graphic3d_ArrayOfSegments) aLines = new Graphic3d_ArrayOfSegments(2, 1);
 315   aLines->AddVertex(aPnt1->impl<gp_Pnt>());
 316   aLines->AddVertex(aPnt2->impl<gp_Pnt>());
 317   theGroup->AddPrimitiveArray(aLines);
 318 }
 319
 320 void SketcherPrs_SymbolPrs::HilightSelected(const Handle(PrsMgr_PresentationManager3d)& thePM,
 321                                            const SelectMgr_SequenceOfOwner& theOwners)
 322 {
 323
 324   Handle( Prs3d_Presentation ) aSelectionPrs = GetSelectPresentation( thePM );
 325   aSelectionPrs->Clear();
 326   drawLines(aSelectionPrs, Quantity_NOC_WHITE);
 327
 328   aSelectionPrs->SetDisplayPriority(9);
 329   aSelectionPrs->Display();
 330   thePM->Highlight(this);
 331 }
 332
 333 void SketcherPrs_SymbolPrs::HilightOwnerWithColor(const Handle(PrsMgr_PresentationManager3d)& thePM,
 334                                                  const Quantity_NameOfColor theColor,
 335                                                  const Handle(SelectMgr_EntityOwner)& theOwner)
 336 {
 337   thePM->Color(this, theColor);
 338
 339   Handle( Prs3d_Presentation ) aHilightPrs = GetHilightPresentation( thePM );
 340   aHilightPrs->Clear();
 341   drawLines(aHilightPrs, theColor);
 342
 343   if (thePM->IsImmediateModeOn())
 344     thePM->AddToImmediateList(aHilightPrs);
 345 }
 346
 347 void SketcherPrs_SymbolPrs::Compute(const Handle(PrsMgr_PresentationManager3d)& thePresentationManager,
 348                                    const Handle(Prs3d_Presentation)& thePresentation,
 349                                    const Standard_Integer theMode)
 350 {
 351   prepareAspect();
 352
 353   Handle(AIS_InteractiveContext) aCtx = GetContext();
 354   Handle(OpenGl_GraphicDriver) aDriver = Handle(OpenGl_GraphicDriver)::DownCast(aCtx->CurrentViewer()->Driver());
 355   if (!aDriver.IsNull()) {
 356     // register the custom element factory function
 357     aDriver->UserDrawCallback() = SymbolPrsCallBack;
 358   }
 359
 360   if (!updatePoints(20)) {
 361     return;
 362   }
 363
 364   int aNbVertex = myPntArray->VertexNumber();
 365   if (myOwner.IsNull()) {
 366     myOwner = new SelectMgr_EntityOwner(this);
 367   }
 368
 369   mySPoints.Clear();
 370   for (int i = 1; i <= aNbVertex; i++) {
 371     Handle(SketcherPrs_SensitivePoint) aSP = new SketcherPrs_SensitivePoint(myOwner, i);
 372     mySPoints.Append(aSP);
 373   }
 374
 375   Handle(Graphic3d_Group) aGroup = Prs3d_Root::NewGroup(thePresentation);
 376   aGroup->SetPrimitivesAspect(myAspect);
 377
 378   Graphic3d_BndBox4f& aBnd = aGroup->ChangeBoundingBox();
 379   gp_Pnt aVert;
 380   aBnd.Clear();
 381   for (int i = 1; i <= myPntArray->ItemNumber(); i++) {
 382     aVert = myPntArray->Vertice(i);
 383     aBnd.Add (Graphic3d_Vec4((float)aVert.X(), (float)aVert.Y(), (float)aVert.Z(), 1.0f));
 384   }
 385
 386   aGroup->UserDraw(this, true);
 387
 388   // Disable frustum culling for this object by marking it as mutable
 389   aGroup->Structure()->SetMutable(true);
 390   //aGroup->AddPrimitiveArray(myPntArray);
 391 }
 392
 393
 394
 395 void SketcherPrs_SymbolPrs::ComputeSelection(const Handle(SelectMgr_Selection)& aSelection,
 396                                             const Standard_Integer aMode)
 397 {
 398   ClearSelected();
 399   if ((aMode == 0) || (aMode == SketcherPrs_Tools::Sel_Constraint)) {
 400     for (int i = 1; i <= mySPoints.Length(); i++)
 401       aSelection->Add(mySPoints.Value(i));
 402   }
 403 }
 404
 405
 406 void SketcherPrs_SymbolPrs::Render(const Handle(OpenGl_Workspace)& theWorkspace) const
 407 {
 408   // do not update presentation for invalid or already removed objects: the presentation
 409   // should be removed soon
 410   if (!myConstraint->data().get() || !myConstraint->data()->isValid())
 411     return;
 412
 413   const OpenGl_AspectMarker* anAspectMarker = theWorkspace->AspectMarker(Standard_True);
 414   const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
 415   Handle(OpenGl_View) aView = theWorkspace->ActiveView();
 416
 417   double aScale = aView->Camera()->Scale();
 418   if (!updatePoints(MyDist * aScale))
 419     return;
 420
 421   Handle(Graphic3d_Buffer) aAttribs = myPntArray->Attributes();
 422
 423   if (myVboAttribs.IsNull()) {
 424     myVboAttribs = new SketcherPrs_VertexBuffer(*aAttribs);
 425   }
 426
 427   if (!myVboAttribs->init(aCtx, 0, aAttribs->NbElements, aAttribs->Data(), GL_NONE, aAttribs->Stride)) {
 428     myVboAttribs->Release (aCtx.operator->());
 429     myVboAttribs.Nullify();
 430     return;
 431   }
 432
 433   Handle(OpenGl_Texture) aTextureBack = theWorkspace->DisableTexture();
 434
 435   const Handle(OpenGl_PointSprite)& aSpriteNorm = anAspectMarker->SpriteRes(aCtx);
 436
 437   if (!aSpriteNorm.IsNull() && !aSpriteNorm->IsDisplayList()) {
 438     const bool toHilight = (theWorkspace->NamedStatus & OPENGL_NS_HIGHLIGHT) != 0;
 439     const Handle(OpenGl_PointSprite)& aSprite = (toHilight && anAspectMarker->SpriteHighlightRes(aCtx)->IsValid())
 440                                               ? anAspectMarker->SpriteHighlightRes(aCtx)
 441                                               : aSpriteNorm;
 442     theWorkspace->EnableTexture (aSprite);
 443     aCtx->ShaderManager()->BindProgram(anAspectMarker, aSprite, Standard_False, Standard_False, anAspectMarker->ShaderProgramRes(aCtx));
 444     const TEL_COLOUR* aLineColor  =  &anAspectMarker->Color();
 445     if (theWorkspace->NamedStatus & OPENGL_NS_HIGHLIGHT)
 446       aLineColor = theWorkspace->HighlightColor;
 447
 448     if (toHilight)
 449       aCtx->core11fwd->glDisable (GL_LIGHTING);
 450     else
 451       aCtx->core11fwd->glEnable (GL_LIGHTING);
 452
 453     aCtx->SetColor4fv(*(const OpenGl_Vec4* )(aLineColor->rgb));
 454
 455
 456     myVboAttribs->BindAllAttributes(aCtx);
 457     // Textured markers will be drawn with the point sprites
 458     aCtx->SetPointSize (anAspectMarker->MarkerSize());
 459     aCtx->core11fwd->glEnable (GL_ALPHA_TEST);
 460     aCtx->core11fwd->glAlphaFunc (GL_GEQUAL, 0.1f);
 461
 462     aCtx->core11fwd->glEnable (GL_BLEND);
 463     aCtx->core11fwd->glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 464
 465     aCtx->core11fwd->glDrawArrays (0, 0, myVboAttribs->GetElemsNb());
 466
 467     aCtx->core11fwd->glDisable (GL_BLEND);
 468     aCtx->core11fwd->glDisable (GL_ALPHA_TEST);
 469     aCtx->SetPointSize (1.0f);
 470   }
 471   theWorkspace->EnableTexture (aTextureBack);
 472   aCtx->BindProgram (NULL);
 473
 474   // Update selection position only if there is no selected object
 475   // because it can corrupt selection of other objects
 476   if ((GetContext()->NbCurrents() == 0) && (GetContext()->NbSelected() == 0))
 477   {
 478     GetContext()->MainSelector()->RebuildSensitivesTree (this);
 479     GetContext()->MainSelector()->RebuildObjectsTree (false);
 480   }
 481 }
 482
 483
 484 void SketcherPrs_SymbolPrs::Release (OpenGl_Context* theContext)
 485 {
 486   if (!myVboAttribs.IsNull()) {
 487     if (theContext) {
 488       theContext->DelayedRelease (myVboAttribs);
 489     }
 490     myVboAttribs.Nullify();
 491   }
 492 }
 493
 494 void SketcherPrs_SymbolPrs::drawShape(const std::shared_ptr<GeomAPI_Shape>& theShape,
 495                                       const Handle(Prs3d_Presentation)& thePrs) const
 496 {
 497   if (theShape->isEdge()) {
 498     std::shared_ptr<GeomAPI_Curve> aCurve =
 499       std::shared_ptr<GeomAPI_Curve>(new GeomAPI_Curve(theShape));
 500     if (aCurve->isLine()) {
 501       GeomAdaptor_Curve aCurv(aCurve->impl<Handle(Geom_Curve)>(), aCurve->startParam(), aCurve->endParam());
 502       StdPrs_Curve::Add(thePrs, aCurv, myDrawer);
 503     } else {
 504       GeomAdaptor_Curve aAdaptor(aCurve->impl<Handle(Geom_Curve)>(), aCurve->startParam(), aCurve->endParam());
 505       StdPrs_DeflectionCurve::Add(thePrs,aAdaptor,myDrawer);
 506     }
 507   } else if (theShape->isVertex()) {
 508     std::shared_ptr<GeomAPI_Vertex> aVertex =
 509       std::shared_ptr<GeomAPI_Vertex>(new GeomAPI_Vertex(theShape));
 510     std::shared_ptr<GeomAPI_Pnt> aPnt = aVertex->point();
 511     Handle(Geom_CartesianPoint) aPoint = new Geom_CartesianPoint(aPnt->impl<gp_Pnt>());
 512     StdPrs_Point::Add(thePrs, aPoint, myDrawer);
 513   }
 514 }
 515
 516 void SketcherPrs_SymbolPrs::drawListOfShapes(const std::shared_ptr<ModelAPI_AttributeRefList>& theListAttr,
 517                                              const Handle(Prs3d_Presentation)& thePrs) const
 518 {
 519   int aNb = theListAttr->size();
 520   if (aNb == 0)
 521     return;
 522   int i;
 523   ObjectPtr aObj;
 524   for (i = 0; i < aNb; i++) {
 525     aObj = theListAttr->object(i);
 526     std::shared_ptr<GeomAPI_Shape> aShape = SketcherPrs_Tools::getShape(aObj);
 527     if (aShape.get() != NULL)
 528       drawShape(aShape, thePrs);
 529   }
 530 }
 531
 532 void SketcherPrs_SymbolPrs::BoundingBox (Bnd_Box& theBndBox)
 533 {
 534   Select3D_BndBox3d aTmpBox;
 535   for (Select3D_EntitySequenceIter aPntIter (mySPoints); aPntIter.More(); aPntIter.Next())
 536   {
 537     const Handle(Select3D_SensitiveEntity)& anEnt = aPntIter.Value();
 538     aTmpBox.Combine (anEnt->BoundingBox());
 539   }
 540
 541   theBndBox.Update (aTmpBox.CornerMin().x(), aTmpBox.CornerMin().y(), aTmpBox.CornerMin().z(),
 542                     aTmpBox.CornerMax().x(), aTmpBox.CornerMax().y(), aTmpBox.CornerMax().z());
 543 }
 544