+// Extrapolate fdm based on jitter time (in milliseconds)
+static FGState extrapolate_fdm( FGState &base, int jitter ) {
+ FGState result;
+
+ double dt = jitter / 1000.0;
+ // cout << "dt = " << dt << endl;
+
+ // start by making a straight up copy
+ result = base;
+
+ double lon = base.get_Longitude() + base.get_Longitude_dot() * dt;
+ double lon_geoc = base.get_Lon_geocentric() + base.get_Longitude_dot() * dt;
+
+ double lat = base.get_Latitude() + base.get_Latitude_dot() * dt;
+ double lat_geoc = base.get_Lat_geocentric() + base.get_Latitude_dot() * dt;
+
+ /*
+ cout << "( " << base.get_Longitude() << ", " <<
+ base.get_Latitude() << " )" << endl;
+ cout << "( " << lon << ", " << lat << " )" << endl;
+ cout << "( " << base.get_Longitude_dot() * dt << ", " <<
+ base.get_Latitude_dot() * dt << ", " <<
+ base.get_Radius_dot() * dt << " )" << endl;
+ */
+
+ double alt = base.get_Altitude() + base.get_Radius_dot() * dt;
+ double radius = base.get_Radius_to_vehicle() + base.get_Radius_dot() * dt;
+
+ result.set_Longitude( lon );
+ result.set_Latitude( lat );
+ result.set_Altitude( alt );
+ // result.set_Geocentric_Position( lon_geoc, lat_geoc, radius );
+
+ return result;
+}
+
+