typedef std::vector<LevelInfo> LevelsList;
typedef std::map<std::string,std::pair<LevelsList,LevelsList> > TreeModel;
+ /*!
+ * \brief Compute numerical functor for the shape.
+ *
+ * Resulting value can be used to sort out shapes according to some parameter.
+ *
+ * Returns a pair of two values (dist, functor) where
+ * - \a dist is a some value that is computed according to the center of mass of given shape;
+ * - \a functor is a numerical functor value
+ *
+ * The numerical functor is computed according to the shape's topological properties as follows:
+ * - orientation for vertices
+ * - length for edges and wires
+ * - area for faces and shells
+ * - volume for solids, compounds, compsolids
+ *
+ * If \a isOldSorting parameter is set to \c true, for all cases linear properties of the shape
+ * are used (to support backward compatibility in some methods). By default, this parameter is
+ * set to \c false.
+ */
+ Standard_EXPORT std::pair<double, double> ShapeToDouble (const TopoDS_Shape& theShape,
+ bool isOldSorting = false);
+
/*!
* \brief Get Local Coordinate System, corresponding to the given shape.
*
