#17237: Body fitting on sub-mesh, #16523: Treatment of internal faces

doc/salome/examples/cartesian_algo.py

@@ -14,10 +14,13 @@ smesh =  smeshBuilder.New()
 
 # create a sphere
 sphere = geompy.MakeSphereR( 50 )
-geompy.addToStudy( sphere, "sphere" )
+
+# cut the sphere by a box
+box = geompy.MakeBoxDXDYDZ( 100, 100, 100 )
+partition = geompy.MakePartition([ sphere ], [ box ], theName="partition")
 
 # create a mesh and assign a "Body Fitting" algo
-mesh = smesh.Mesh( sphere )
+mesh = smesh.Mesh( partition )
 cartAlgo = mesh.BodyFitted()
 
 # define a cartesian grid using Coordinates
@@ -38,7 +41,27 @@ mesh.Compute()
 print("nb hexahedra",mesh.NbHexas())
 print("nb tetrahedra",mesh.NbTetras())
 print("nb polyhedra",mesh.NbPolyhedrons())
+print("nb faces",mesh.NbFaces())
+print()
 
+# activate creation of faces
+cartHyp.SetToCreateFaces( True )
+
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print("nb faces",mesh.NbFaces())
+print()
+
+# enable consideration of shared faces
+cartHyp.SetToConsiderInternalFaces( True )
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print("nb faces",mesh.NbFaces())
+print()
 
 # define the grid by setting different spacing in 2 sub-ranges of geometry
 spaceFuns = ["5","10+10*t"]

doc/salome/gui/SMESH/input/cartesian_algo.rst

@@ -52,6 +52,9 @@ This dialog allows to define
 	.. centered::
 		Implement Edges switched off to the left and on to the right
 
+* **Create Faces** check-box activates creation on mesh faces.
+* **Consider Shared and Internal Faces** check-box activates treatment of faces shared by solids and internal. By default the algorithm considers only outer boundaries of the geometry.
+* **Apply Threshold to Shared / Internal Faces** check-box activates application of **Threshold** to cells cut by shared and internal faces, that can cause appearance of holes inside the mesh.
 * **Definition mode** allows choosing how Cartesian structured grid is defined. Location of nodes along each grid axis is defined individually:
     
 	* You can specify the **Coordinates** of grid nodes. **Insert** button inserts a node at **Step** distance (negative or positive) from the selected node. **Delete** button removes the selected node. Double click on a coordinate in the list enables its edition. **Note** that node coordinates are measured along directions of axes that can differ from the directions of the Global Coordinate System.

idl/SMESH_BasicHypothesis.idl

@@ -1037,7 +1037,7 @@ module StdMeshers
     boolean GetFixedPoint(out SMESH::PointStruct p);
 
     /*!
-     * Enables implementation of geometrical edges into the mesh. If this feature
+     * Enable implementation of geometrical edges into the mesh. If this feature
      * is disabled, sharp edges of the shape are lost ("smoothed") in the mesh if
      * they don't coincide with the grid lines
      */
@@ -1045,17 +1045,35 @@ module StdMeshers
     boolean GetToAddEdges();
 
     /*!
-     * Returns axes at which a number of generated hexahedra is maximal
+     * Enable treatment of geom faces, either shared by solids or internal.
+     */
+    void SetToConsiderInternalFaces(in boolean toTreat);
+    boolean GetToConsiderInternalFaces();
+
+    /*!
+     * Enable applying size threshold to grid cells cut by internal geom faces.
+     */
+    void SetToUseThresholdForInternalFaces(in boolean toUse);
+    boolean GetToUseThresholdForInternalFaces();
+
+    /*!
+     * Enable creation of mesh faces.
+     */
+    void SetToCreateFaces(in boolean toCreate);
+    boolean GetToCreateFaces();
+
+    /*!
+     * Return axes at which a number of generated hexahedra is maximal
      */
     void ComputeOptimalAxesDirs(in GEOM::GEOM_Object shape,
                                 in boolean           isOrthogonal,
                                 out SMESH::DirStruct x,
                                 out SMESH::DirStruct y,
-                                out SMESH::DirStruct z ) 
+                                out SMESH::DirStruct z )
       raises (SALOME::SALOME_Exception);
 
     /*!
-     * \brief Computes node coordinates by spacing functions
+     * \brief Compute node coordinates by spacing functions
      *  \param x0 - lower coordinate
      *  \param x1 - upper coordinate
      *  \param spaceFuns - space functions

resources/StdMeshers.xml.in

@@ -224,7 +224,6 @@
     <hypothesis type     ="CartesianParameters3D"
                 label-id ="Body Fitting Parameters"
                 icon-id  ="mesh_hypo_length.png"
-                context  ="GLOBAL"
                 dim      ="3"/>
 
   </hypotheses>
@@ -570,7 +569,6 @@
                support-submeshes="false"
                output           ="HEXA"
                need-hyp         ="true"
-               context          ="GLOBAL"
                dim              ="3">
       <python-wrap>
         <algo>Cartesian_3D=BodyFitted()</algo>

src/Controls/SMESH_Controls.cxx

@@ -4262,6 +4262,7 @@ private:
   bool isOutOfFace  (const gp_Pnt& p);
   bool isOutOfEdge  (const gp_Pnt& p);
   bool isOutOfVertex(const gp_Pnt& p);
+  bool isOutOfNone  (const gp_Pnt& p) { return true; }
   bool isBox        (const TopoDS_Shape& s);
 
   bool (Classifier::*          myIsOutFun)(const gp_Pnt& p);
@@ -4583,7 +4584,7 @@ bool ElementsOnShape::IsSatisfy (const SMDS_MeshNode* node,
         {
           isNodeOut = false;
           if ( okShape )
-            *okShape = myWorkClassifiers[i]->Shape();
+            *okShape = myClassifiers[i].Shape();
           break;
         }
     }
@@ -4621,17 +4622,27 @@ void ElementsOnShape::Classifier::Init( const TopoDS_Shape& theShape,
   {
     Standard_Real u1,u2,v1,v2;
     Handle(Geom_Surface) surf = BRep_Tool::Surface( TopoDS::Face( theShape ));
-    surf->Bounds( u1,u2,v1,v2 );
-    myProjFace.Init(surf, u1,u2, v1,v2, myTol );
-    myIsOutFun = & ElementsOnShape::Classifier::isOutOfFace;
+    if ( surf.IsNull() )
+      myIsOutFun = & ElementsOnShape::Classifier::isOutOfNone;
+    else
+    {
+      surf->Bounds( u1,u2,v1,v2 );
+      myProjFace.Init(surf, u1,u2, v1,v2, myTol );
+      myIsOutFun = & ElementsOnShape::Classifier::isOutOfFace;
+    }
     break;
   }
   case TopAbs_EDGE:
   {
     Standard_Real u1, u2;
     Handle(Geom_Curve) curve = BRep_Tool::Curve( TopoDS::Edge( theShape ), u1, u2);
-    myProjEdge.Init(curve, u1, u2);
-    myIsOutFun = & ElementsOnShape::Classifier::isOutOfEdge;
+    if ( curve.IsNull() )
+      myIsOutFun = & ElementsOnShape::Classifier::isOutOfNone;
+    else
+    {
+      myProjEdge.Init(curve, u1, u2);
+      myIsOutFun = & ElementsOnShape::Classifier::isOutOfEdge;
+    }
     break;
   }
   case TopAbs_VERTEX:

src/SMESH/SMESH_MeshEditor.cxx

@@ -161,8 +161,7 @@ SMESH_MeshEditor::ElemFeatures::Init( const SMDS_MeshElement* elem, bool basicOn
         myIsQuad = elem->IsQuadratic();
         if ( myType == SMDSAbs_Volume && !basicOnly )
         {
-          vector<int> quant = static_cast<const SMDS_MeshVolume* >( elem )->GetQuantities();
-          myPolyhedQuantities.swap( quant );
+          myPolyhedQuantities = static_cast<const SMDS_MeshVolume* >( elem )->GetQuantities();
         }
       }
     }

src/SMESHDS/SMESHDS_SubMesh.cxx

@@ -115,9 +115,12 @@ void SMESHDS_SubMesh::AddElement(const SMDS_MeshElement * elem)
           (LOCALIZED("add element in subshape already belonging to a subshape"));
       }
     }
+    else
+    {
+      ++myNbElements;
+    }
 
     elem->setShapeID( myIndex );
-    myNbElements++;
 
     // remember element with smallest ID to optimize iteration on them
     add( elem );
@@ -178,8 +181,11 @@ void SMESHDS_SubMesh::AddNode(const SMDS_MeshNode * N)
           (LOCALIZED("a node being in sub-mesh is added to another sub-mesh"));
       return; // already in
     }
+    else
+    {
+      ++myNbNodes;
+    }
     N->setShapeID( myIndex );
-    myNbNodes++;
 
     // remember node with smallest ID to optimize iteration on them
     add( N );

src/SMESHGUI/SMESHGUI_Hypotheses.cxx

@@ -813,8 +813,8 @@ HypothesesSet::HypothesesSet( const QString& theSetName,
   : myUseCommonSize( useCommonSize ),
     myQuadDominated( isQuadDominated ),
     myHypoSetName( theSetName ),
-	myHypoList { mainHypos, altHypos, intHypos },
-	myAlgoList { mainAlgos, altAlgos, intAlgos },
+    myHypoList { mainHypos, altHypos, intHypos },
+    myAlgoList { mainAlgos, altAlgos, intAlgos },
     myIsAlgo( false ),
     myIsCustom( false ),
     myIndex( 0 )

src/StdMeshers/StdMeshers_CartesianParameters3D.cxx

@@ -64,7 +64,10 @@ StdMeshers_CartesianParameters3D::StdMeshers_CartesianParameters3D(int         h
                                                                    SMESH_Gen * gen)
   : SMESH_Hypothesis(hypId, gen),
     _sizeThreshold( 4.0 ), // default according to the customer specification
-    _toAddEdges( false )
+    _toAddEdges( false ),
+    _toConsiderInternalFaces( false ),
+    _toUseThresholdForInternalFaces( false ),
+    _toCreateFaces( false )
 {
   _name = "CartesianParameters3D"; // used by "Cartesian_3D"
   _param_algo_dim = 3; // 3D
@@ -739,6 +742,48 @@ bool StdMeshers_CartesianParameters3D::GetToAddEdges() const
   return _toAddEdges;
 }
 
+//=======================================================================
+//function : SetToConsiderInternalFaces
+//purpose  : Enables treatment of geom faces either shared by solids or internal
+//=======================================================================
+
+void StdMeshers_CartesianParameters3D::SetToConsiderInternalFaces(bool toTreat)
+{
+  if ( _toConsiderInternalFaces != toTreat )
+  {
+    _toConsiderInternalFaces = toTreat;
+    NotifySubMeshesHypothesisModification();
+  }
+}
+
+//=======================================================================
+//function : SetToUseThresholdForInternalFaces
+//purpose  : Enables applying size threshold to grid cells cut by internal geom faces.
+//=======================================================================
+
+void StdMeshers_CartesianParameters3D::SetToUseThresholdForInternalFaces(bool toUse)
+{
+  if ( _toUseThresholdForInternalFaces != toUse )
+  {
+    _toUseThresholdForInternalFaces = toUse;
+    NotifySubMeshesHypothesisModification();
+  }
+}
+
+//=======================================================================
+//function : SetToCreateFaces
+//purpose  : Enables creation of mesh faces.
+//=======================================================================
+
+void StdMeshers_CartesianParameters3D::SetToCreateFaces(bool toCreate)
+{
+  if ( _toCreateFaces != toCreate )
+  {
+    _toCreateFaces = toCreate;
+    NotifySubMeshesHypothesisModification();
+  }
+}
+
 //=======================================================================
 //function : IsDefined
 //purpose  : Return true if parameters are well defined
@@ -786,6 +831,10 @@ std::ostream & StdMeshers_CartesianParameters3D::SaveTo(std::ostream & save)
   for ( int i = 0; i < 3; ++i )
     save << _fixedPoint[i] << " ";
 
+  save << " " << _toConsiderInternalFaces
+       << " " << _toUseThresholdForInternalFaces
+       << " " << _toCreateFaces;
+
   return save;
 }
 
@@ -844,6 +893,12 @@ std::istream & StdMeshers_CartesianParameters3D::LoadFrom(std::istream & load)
   for ( int i = 0; i < 3 && ok ; ++i )
     ok = static_cast<bool>( load >> _fixedPoint[i]);
 
+  if ( load >> _toConsiderInternalFaces )
+  {
+    load >> _toUseThresholdForInternalFaces;
+    load >> _toCreateFaces;
+  }
+
   return load;
 }
 

src/StdMeshers/StdMeshers_CartesianParameters3D.hxx

@@ -139,6 +139,25 @@ public:
   void SetToAddEdges(bool toAdd);
   bool GetToAddEdges() const;
 
+  /*!
+   * \brief Enables treatment of geom faces either shared by solids or internal.
+   */
+  void SetToConsiderInternalFaces(bool toTreat);
+  bool GetToConsiderInternalFaces() const { return _toConsiderInternalFaces; }
+
+  /*!
+   * \brief Enables applying size threshold to grid cells cut by internal geom faces.
+   */
+  void SetToUseThresholdForInternalFaces(bool toUse);
+  bool GetToUseThresholdForInternalFaces() const { return _toUseThresholdForInternalFaces; }
+
+  /*!
+   * \brief Enables creation of mesh faces.
+   */
+  void SetToCreateFaces(bool toCreate);
+  bool GetToCreateFaces() const { return _toCreateFaces; }
+
+
   /*!
    * \brief Return true if parameters are well defined
    */
@@ -171,6 +190,9 @@ public:
 
   double _sizeThreshold;
   bool   _toAddEdges;
+  bool   _toConsiderInternalFaces;
+  bool   _toUseThresholdForInternalFaces;
+  bool   _toCreateFaces;
 };
 
 #endif

src/StdMeshersGUI/StdMeshersGUI_CartesianParamCreator.cxx

@@ -204,8 +204,8 @@ namespace StdMeshersGUI
     axisTabLayout->setSpacing( SPACING );
 
     axisTabLayout->addWidget( modeBox    , 0, 0, 1, 3 );
-    axisTabLayout->addWidget( myInsertBtn  , 1, 0, 1, 2 );
-    axisTabLayout->addWidget( myDeleteBtn  , 2, 0, 1, 2 );
+    axisTabLayout->addWidget( myInsertBtn, 1, 0, 1, 2 );
+    axisTabLayout->addWidget( myDeleteBtn, 2, 0, 1, 2 );
     axisTabLayout->addWidget( myStepLabel, 3, 0 );
     axisTabLayout->addWidget( myStepSpin , 3, 1 );
     axisTabLayout->addWidget( csFrame    , 1, 2, 4, 1 );
@@ -821,6 +821,15 @@ QFrame* StdMeshersGUI_CartesianParamCreator::buildFrame()
   myAddEdges = new QCheckBox( tr("ADD_EDGES"), GroupC1 );
   argGroupLayout->addWidget( myAddEdges, row, 0, 1, 2 );
   row++;
+  myCreateFaces = new QCheckBox( tr("CREATE_FACES"), GroupC1 );
+  argGroupLayout->addWidget( myCreateFaces, row, 0, 1, 2 );
+  row++;
+  myConsiderInternalFaces = new QCheckBox( tr("CONSIDER_INTERNAL_FACES"), GroupC1 );
+  argGroupLayout->addWidget( myConsiderInternalFaces, row, 0, 1, 2 );
+  row++;
+  myUseThresholdForInternalFaces = new QCheckBox( tr("USE_THRESHOLD_FOR_INTERNAL_FACES"), GroupC1 );
+  argGroupLayout->addWidget( myUseThresholdForInternalFaces, row, 0, 1, 2 );
+  row++;
 
   // 3)  Grid definition
   QTabWidget* tabWdg = new QTabWidget( fr );
@@ -924,6 +933,8 @@ QFrame* StdMeshersGUI_CartesianParamCreator::buildFrame()
   connect( myOrthogonalChk, SIGNAL( toggled(bool)),             SLOT( onOrthogonalAxes(bool)));
   connect( optimBtn,        SIGNAL( clicked(bool)),             SLOT( onOptimalAxes(bool)));
   connect( resetBtn,        SIGNAL( clicked(bool)),             SLOT( onResetAxes(bool)));
+  connect( myConsiderInternalFaces,      SIGNAL( toggled(bool)),
+           myUseThresholdForInternalFaces, SLOT( setEnabled(bool)));
   for ( int i = 0; i < 3; ++i )
   {
     connect( myXDirSpin[i], SIGNAL(valueChanged   (const QString&)),
@@ -999,6 +1010,9 @@ void StdMeshersGUI_CartesianParamCreator::retrieveParams() const
     myThreshold->setText( varName );
 
   myAddEdges->setChecked( h->GetToAddEdges() );
+  myCreateFaces->setChecked( h->GetToCreateFaces() );
+  myConsiderInternalFaces->setChecked( h->GetToConsiderInternalFaces() );
+  myUseThresholdForInternalFaces->setChecked( h->GetToUseThresholdForInternalFaces() );
 
   // grid definition
   for ( int ax = 0; ax < 3; ++ax )
@@ -1086,6 +1100,9 @@ QString StdMeshersGUI_CartesianParamCreator::storeParams() const
     h->SetVarParameter( myThreshold->text().toLatin1().constData(), "SetSizeThreshold" );
     h->SetSizeThreshold( myThreshold->text().toDouble() );
     h->SetToAddEdges( myAddEdges->isChecked() );
+    h->SetToCreateFaces( myCreateFaces->isChecked() );
+    h->SetToConsiderInternalFaces( myConsiderInternalFaces->isChecked() );
+    h->SetToUseThresholdForInternalFaces( myUseThresholdForInternalFaces->isChecked() );
 
     // grid
     for ( int ax = 0; ax < 3; ++ax )

src/StdMeshersGUI/StdMeshersGUI_CartesianParamCreator.h

@@ -152,6 +152,9 @@ private:
   QLineEdit*                  myName;
   SMESHGUI_SpinBox*           myThreshold;
   QCheckBox*                  myAddEdges;
+  QCheckBox*                  myCreateFaces;
+  QCheckBox*                  myConsiderInternalFaces;
+  QCheckBox*                  myUseThresholdForInternalFaces;
 
   StdMeshersGUI::GridAxisTab* myAxisTabs[3];
   QGroupBox*                  myFixedPointGrp;

src/StdMeshersGUI/StdMeshers_msg_en.ts

@@ -580,6 +580,18 @@ this one for this mesh/sub-mesh.</translation>
         <source>ADD_EDGES</source>
         <translation>Implement Edges</translation>
     </message>
+    <message>
+        <source>CREATE_FACES</source>
+        <translation>Create Faces</translation>
+    </message>
+    <message>
+        <source>CONSIDER_INTERNAL_FACES</source>
+        <translation>Consider Shared and Internal Faces</translation>
+    </message>
+    <message>
+        <source>USE_THRESHOLD_FOR_INTERNAL_FACES</source>
+        <translation>Apply Threshold to Shared / Internal Faces</translation>
+    </message>
     <message>
         <source>AXIS_X</source>
         <translation>Axis X</translation>

src/StdMeshers_I/StdMeshers_CartesianParameters3D_i.cxx

@@ -240,6 +240,14 @@ void StdMeshers_CartesianParameters3D_i::SetAxesDirs(const SMESH::DirStruct& xDi
   coords[6] = zDir.PS.x;
   coords[7] = zDir.PS.y;
   coords[8] = zDir.PS.z;
+
+  const double* oldCoords = GetImpl()->GetAxisDirs();
+  bool isSame = true;
+  for ( int i = 0; i < 9 &&  isSame; ++i )
+    isSame = ( oldCoords[i] == coords[i] );
+  if ( isSame )
+    return;
+
   try {
     this->GetImpl()->SetAxisDirs(coords);
 
@@ -283,6 +291,11 @@ void StdMeshers_CartesianParameters3D_i::GetAxesDirs(SMESH::DirStruct& xDir,
 void StdMeshers_CartesianParameters3D_i::SetFixedPoint(const SMESH::PointStruct& ps,
                                                        CORBA::Boolean            toUnset)
 {
+  SMESH::PointStruct oldPS;
+  GetFixedPoint( oldPS );
+  if ( oldPS.x == ps.x && oldPS.y == ps.y && oldPS.z == ps.z )
+    return;
+
   double p[3] = { ps.x, ps.y, ps.z };
   GetImpl()->SetFixedPoint( p, toUnset );
 
@@ -335,6 +348,76 @@ CORBA::Boolean StdMeshers_CartesianParameters3D_i::GetToAddEdges()
   return GetImpl()->GetToAddEdges();
 }
 
+//=======================================================================
+//function : SetToConsiderInternalFaces
+//purpose  : Enables treatment of geom faces, either shared by solids or internal.
+//=======================================================================
+
+void  StdMeshers_CartesianParameters3D_i::SetToConsiderInternalFaces(CORBA::Boolean toTreat)
+{
+  if ( GetToConsiderInternalFaces() == toTreat )
+    return;
+  GetImpl()->SetToConsiderInternalFaces( toTreat );
+  SMESH::TPythonDump() << _this() << ".SetToConsiderInternalFaces( " << toTreat << " )";
+}
+
+//=======================================================================
+//function : GetToConsiderInternalFaces
+//purpose  : Return true if treatment of internal geom faces is enabled
+//=======================================================================
+
+CORBA::Boolean  StdMeshers_CartesianParameters3D_i::GetToConsiderInternalFaces()
+{
+  return GetImpl()->GetToConsiderInternalFaces();
+}
+
+//=======================================================================
+//function : SetToUseThresholdForInternalFaces
+//purpose  : Enables applying size threshold to grid cells cut by internal geom faces.
+//=======================================================================
+
+void  StdMeshers_CartesianParameters3D_i::SetToUseThresholdForInternalFaces(CORBA::Boolean toUse)
+{
+  if ( GetToUseThresholdForInternalFaces() == toUse )
+    return;
+  GetImpl()->SetToUseThresholdForInternalFaces( toUse );
+  SMESH::TPythonDump() << _this() << ".SetToUseThresholdForInternalFaces( " << toUse << " )";
+}
+
+//=======================================================================
+//function : GetToUseThresholdForInternalFaces
+//purpose  : Return true if applying size threshold to grid cells cut by
+//           internal geom faces is enabled
+//=======================================================================
+
+CORBA::Boolean StdMeshers_CartesianParameters3D_i::GetToUseThresholdForInternalFaces()
+{
+  return GetImpl()->GetToUseThresholdForInternalFaces();
+}
+
+//=======================================================================
+//function : SetToCreateFaces
+//purpose  : Enables creation of mesh faces.
+//=======================================================================
+
+void  StdMeshers_CartesianParameters3D_i::SetToCreateFaces(CORBA::Boolean toCreate)
+{
+  if ( GetToCreateFaces() == toCreate )
+    return;
+  GetImpl()->SetToCreateFaces( toCreate );
+  SMESH::TPythonDump() << _this() << ".SetToCreateFaces( " << toCreate << " )";
+}
+
+//=======================================================================
+//function : GetToCreateFaces
+//purpose  : Check if creation of mesh faces enabled
+//=======================================================================
+
+CORBA::Boolean StdMeshers_CartesianParameters3D_i::GetToCreateFaces()
+{
+  return GetImpl()->GetToCreateFaces();
+}
+
 //=======================================================================
 //function : IsGridBySpacing
 //purpose  : Return true if the grid is defined by spacing functions and

src/StdMeshers_I/StdMeshers_CartesianParameters3D_i.hxx

@@ -100,7 +100,7 @@ class STDMESHERS_I_EXPORT StdMeshers_CartesianParameters3D_i:
 
 
   /*!
-   * \brief Enables implementation of geometrical edges into the mesh. If this feature
+   * \brief Enable implementation of geometrical edges into the mesh. If this feature
    *        is disabled, sharp edges of the shape are lost ("smoothed") in the mesh if
    *        they don't coincide with the grid lines
    */
@@ -108,13 +108,32 @@ class STDMESHERS_I_EXPORT StdMeshers_CartesianParameters3D_i:
   CORBA::Boolean GetToAddEdges();
 
   /*!
-   * \brief Return true if the grid is defined by spacing functions and 
+   * Enable treatment of geom faces, either shared by solids or internal.
+   */
+  void SetToConsiderInternalFaces(CORBA::Boolean toTreat);
+  CORBA::Boolean GetToConsiderInternalFaces();
+
+  /*!
+   * Enable applying size threshold to grid cells cut by internal geom faces.
+   */
+  void SetToUseThresholdForInternalFaces(CORBA::Boolean toUse);
+  CORBA::Boolean GetToUseThresholdForInternalFaces();
+
+  /*!
+   * Enable creation of mesh faces.
+   */
+  void SetToCreateFaces(CORBA::Boolean toCreate);
+  CORBA::Boolean GetToCreateFaces();
+
+
+  /*!
+   * \brief Return true if the grid is defined by spacing functions and
    *        not by node coordinates
    */
   CORBA::Boolean IsGridBySpacing(CORBA::Short axis);
 
   /*!
-   * Returns axes at which number of hexahedra is maximal
+   * Return axes at which number of hexahedra is maximal
    */
   void ComputeOptimalAxesDirs(GEOM::GEOM_Object_ptr shape,
                               CORBA::Boolean        isOrthogonal,
@@ -122,7 +141,7 @@ class STDMESHERS_I_EXPORT StdMeshers_CartesianParameters3D_i:
                               SMESH::DirStruct&     y,
                               SMESH::DirStruct&     z) throw (SALOME::SALOME_Exception);
   /*!
-   * \brief Computes node coordinates by spacing functions
+   * \brief Compute node coordinates by spacing functions
    *  \param x0 - lower coordinate
    *  \param x1 - upper coordinate
    *  \param spaceFuns - space functions