+public:
+
+ // ===========================
+ // Access to nodes
+ // ===========================
+ virtual SMDS_ElemIteratorPtr nodesIterator() const = 0;
+
+ virtual SMDS_NodeIteratorPtr nodeIterator() const = 0;
+ virtual SMDS_NodeIteratorPtr interlacedNodesIterator() const { return nodeIterator(); }
+ virtual SMDS_NodeIteratorPtr nodesIteratorToUNV() const { return nodeIterator(); }
+
+ // std-like iteration on nodes
+ typedef SMDS_StdIterator< const SMDS_MeshNode*, SMDS_NodeIteratorPtr > iterator;
+ iterator begin_nodes() const { return iterator( nodeIterator() ); }
+ iterator end_nodes() const { return iterator(); }
+
+ // ===========================
+ // Type of element
+ // ===========================
+ virtual int NbNodes() const = 0;
+ virtual int NbEdges() const = 0;
+ virtual int NbFaces() const = 0;
+
+ virtual SMDSAbs_ElementType GetType() const = 0;
+ virtual SMDSAbs_EntityType GetEntityType() const = 0;
+ virtual SMDSAbs_GeometryType GetGeomType() const = 0;
+ virtual VTKCellType GetVtkType() const = 0;
+
+ virtual bool IsPoly() const = 0;
+ virtual bool IsQuadratic() const = 0;
+ virtual bool IsMediumNode(const SMDS_MeshNode* node) const;
+ virtual int NbCornerNodes() const = 0;
+
+ // ===========================
+ // Access to nodes by index
+ // ===========================
+ /*!
+ * \brief Return node by its index
+ * \param ind - node index
+ * \retval const SMDS_MeshNode* - the node
+ */
+ virtual const SMDS_MeshNode* GetNode(const int ind) const = 0;
+
+ /*!
+ * \brief Return node by its index
+ * \param ind - node index
+ * \retval const SMDS_MeshNode* - the node
+ *
+ * Index is wrapped if it is out of a valid range of corner nodes
+ */
+ const SMDS_MeshNode* GetNodeWrap(const int ind) const { return GetNode( WrappedIndex( ind )); }
+
+ /*!
+ * \brief Return true if index of node is valid (0 <= ind < NbNodes())
+ * \param ind - node index
+ * \retval bool - index check result
+ */
+ virtual bool IsValidIndex(const int ind) const;
+
+ /*!
+ * \brief Return a valid corner node index, fixing the given one if necessary
+ * \param ind - node index
+ * \retval int - valid node index
+ */
+ int WrappedIndex(const int ind) const;
+
+ /*!
+ * \brief Check if a node belongs to the element
+ * \param node - the node to check
+ * \retval int - node index within the element, -1 if not found
+ */
+ virtual int GetNodeIndex( const SMDS_MeshNode* node ) const;
+
+
+ virtual int GetID() const;
+ virtual int GetVtkID() const;
+ virtual int getshapeId() const { return GetShapeID(); }
+ virtual int GetShapeID() const;
+
+ // mark this element; to be used in algos
+ virtual void setIsMarked( bool is ) const;
+ virtual bool isMarked() const;
+
+ // element can be allocated but "not used"
+ bool IsNull() const { return myHolder == 0; }
+
+ SMDS_Mesh* GetMesh() const;
+
+ void Print(std::ostream & OS) const;
+
+ friend SMDS_EXPORT std::ostream & operator <<(std::ostream & OS, const SMDS_MeshElement *);
+ friend class SMDS_ElementFactory;
+ friend class SMESHDS_SubMesh;
+
+ /*!
+ * \brief Filters of elements, to be used with SMDS_SetIterator
+ */
+ struct Filter
+ {
+ virtual bool operator()(const SMDS_MeshElement* e) const = 0;
+ virtual ~Filter() {}
+ };
+ struct NonNullFilter: public Filter
+ {
+ bool operator()(const SMDS_MeshElement* e) const { return e; }
+ };
+ struct TypeFilter : public Filter
+ {
+ SMDSAbs_ElementType _type;
+ TypeFilter( SMDSAbs_ElementType t = SMDSAbs_NbElementTypes ):_type(t) {}
+ bool operator()(const SMDS_MeshElement* e) const { return e && e->GetType() == _type; }
+ };
+ struct EntityFilter : public Filter
+ {
+ SMDSAbs_EntityType _type;
+ EntityFilter( SMDSAbs_EntityType t = SMDSEntity_Last ):_type(t) {}
+ bool operator()(const SMDS_MeshElement* e) const { return e && e->GetEntityType() == _type; }
+ };
+ struct GeomFilter : public Filter
+ {
+ SMDSAbs_GeometryType _type;
+ GeomFilter( SMDSAbs_GeometryType t = SMDSGeom_NONE ):_type(t) {}
+ bool operator()(const SMDS_MeshElement* e) const { return e && e->GetGeomType() == _type; }
+ };
+
+ protected:
+
+ SMDS_MeshElement();
+
+ void setVtkID(const int vtkID );
+ virtual void setShapeID( const int shapeID ) const;
+
+ SMDS_UnstructuredGrid* getGrid() const;
+
+ protected:
+
+ SMDS_ElementChunk* myHolder;
+};
+
+// ============================================================
+/*!
+ * \brief Comparator of elements by ID for usage in std containers
+ */
+// ============================================================
+
+struct TIDTypeCompare {
+ bool operator () (const SMDS_MeshElement* e1, const SMDS_MeshElement* e2) const
+ { return e1->GetType() == e2->GetType() ? e1->GetID() < e2->GetID() : e1->GetType() < e2->GetType(); }
+};