+ double Volume(SMESH::SMESH_IDSource_ptr theSource);
+
+ /*!
+ * gravity center of the source
+ */
+ SMESH::PointStruct GravityCenter(SMESH::SMESH_IDSource_ptr theSource);
+
+ /*!
+ * angle in radians defined by 3 points <(p1,p2,p3)
+ */
+ CORBA::Double Angle(const SMESH::PointStruct& p1,
+ const SMESH::PointStruct& p2,
+ const SMESH::PointStruct& p3 );