+//=======================================================================

+//=======================================================================
+/*!
+ * \brief SMESH_TLink knowing its orientation
+ */
+//=======================================================================
+
+struct SMESH_OrientedLink: public SMESH_TLink
+{
+  bool _reversed;
+  SMESH_OrientedLink(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2 )
+    : SMESH_TLink( n1, n2 ), _reversed( n1 != node1() ) {}
+};