X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fmagvar%2Fmagvar.hxx;h=6a97e5ea7719eb3eb137910c8b6641ae82de96d4;hb=e6d01ed1a3c0bb34928dc96098ea16c877d049e9;hp=c2e80bc4a5194b17480ddf624b03292d3abeb674;hpb=4e7fe460a5c5c1b64dd1d540bc197dbb89614b7f;p=simgear.git

diff --git a/simgear/magvar/magvar.hxx b/simgear/magvar/magvar.hxx
index c2e80bc4..6a97e5ea 100644
--- a/simgear/magvar/magvar.hxx
+++ b/simgear/magvar/magvar.hxx
@@ -33,6 +33,9 @@
 #endif
 
 
+// forward decls
+class SGGeod;
+
 /**
  * Magnetic variation wrapper class.
  *
@@ -78,6 +81,11 @@ public:
      */
     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; }