X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FFDM%2FUIUCModel%2Fuiuc_getwind.cpp;h=35628407b85b976b9ec471f43554d8f51382500d;hb=70b4f38ebccbafea664ed2310eaf990bd2b9edd8;hp=810feef4459d4833d3168dbeaa1950ba50c99764;hpb=7289eaa8baafac56a3e32dedd5b77d3534d61c4a;p=flightgear.git

diff --git a/src/FDM/UIUCModel/uiuc_getwind.cpp b/src/FDM/UIUCModel/uiuc_getwind.cpp
index 810feef44..35628407b 100644
--- a/src/FDM/UIUCModel/uiuc_getwind.cpp
+++ b/src/FDM/UIUCModel/uiuc_getwind.cpp
@@ -58,8 +58,7 @@
 
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- USA or view http://www.gnu.org/copyleft/gpl.html.
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 **********************************************************************/
 
@@ -101,9 +100,12 @@ void uiuc_getwind()
 	/* Get wind vector */
 	double windmag = 0; //Wind magnitude
 	double a = 0; //Parabola: Altitude = a*windmag^2 + zoff
+        double x = pow(uref,2.);
 	
-	a = zref/pow(uref,2.);
-	if (Altitude >= zoff)
+        if (x) {
+	    a = zref/x;
+        }
+	if ((Altitude >= zoff) && (a > 0))
 		windmag = sqrt(Altitude/a);
 	else
 		windmag = 0.;