+ friend std::ostream & operator <<(std::ostream & OS, const SMDS_MeshElement *);
+ friend bool SMDS_MeshElementIDFactory::BindID(int ID,SMDS_MeshElement*elem);
+
+ // ===========================
+ // Access to nodes by index
+ // ===========================
+ /*!
+ * \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
+ */
+ virtual const SMDS_MeshNode* GetNode(const int ind) const;
+
+ /*!
+ * \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 node index, fixing the given one if necessary
+ * \param ind - node index
+ * \retval int - valid node index
+ */
+ int WrappedIndex(const int ind) const {
+ if ( ind < 0 ) return -( ind % NbNodes());
+ if ( ind >= NbNodes() ) return ind % NbNodes();
+ return ind;
+ }
+
+protected:
+ SMDS_MeshElement(int ID=-1);
+ virtual void Print(std::ostream & OS) const;
+
+private:
+ int myID;