#endif
+// forward decls
+class SGGeod;
+
/**
* Magnetic variation wrapper class.
*
*/
void update( double lon, double lat, double alt_m, double jd );
+ /**
+ * overloaded variant taking an SGGeod to specify position
+ */
+ void update( const SGGeod& geod, double jd );
+
/** @return the current magnetic variation in radians. */
double get_magvar() const { return magvar; }
*/
double sgGetMagVar( double lon, double lat, double alt_m, double jd );
+/**
+ * overload version of the above to take a SGGeod
+ */
+double sgGetMagVar( const SGGeod& pos, double jd );
#endif // _MAGVAR_HXX