Fixed access to average speed for supplied angle and windspeed

java/com.sap.sailing.polars/src/com/sap/sailing/polars/impl/PolarDataServiceImpl.java

@@ -165,7 +165,7 @@ public class PolarDataServiceImpl implements PolarDataService {
     @Override
     public PolynomialFunction getSpeedRegressionFunction(BoatClass boatClass, double trueWindAngle)
             throws NotEnoughDataHasBeenAddedException {
-        return polarDataMiner.getSpeedRegressionFunction(boatClass, trueWindAngle);
+        return polarDataMiner.getSpeedRegressionFunction(boatClass, Math.abs(trueWindAngle));
     }
 
     @Override

java/com.sap.sailing.polars/src/com/sap/sailing/polars/mining/GPSFixMovingWithPolarContext.java

@@ -72,10 +72,13 @@ public class GPSFixMovingWithPolarContext implements MovingAveragePolarClusterKe
 
     private BearingWithConfidence<Void> computeTrueWindAngleAbsolute() {
         BearingWithConfidenceImpl<Void> result = null;
-        Bearing bearing;
+        Bearing bearing = null;
         try {
-            Bearing realBearing = race.getCurrentLeg(competitor, fix.getTimePoint()).getBeatAngle(fix.getTimePoint());
-            bearing = new DegreeBearingImpl(Math.abs(realBearing.getDegrees()));
+            TrackedLegOfCompetitor currentLeg = race.getCurrentLeg(competitor, fix.getTimePoint());
+            if (currentLeg != null) {
+                Bearing realBearing = currentLeg.getBeatAngle(fix.getTimePoint());
+                bearing = new DegreeBearingImpl(Math.abs(realBearing.getDegrees()));
+            }
         } catch (NoWindException e) {
             bearing = null;
         }

java/com.sap.sailing.polars/src/com/sap/sailing/polars/mining/SpeedRegressionPerAngleClusterProcessor.java

@@ -67,7 +67,7 @@ public class SpeedRegressionPerAngleClusterProcessor implements Processor<Groupe
         double speedSum = 0;
         double numberOfSpeeds = 0;
         for (int i = -5; i <= 5; i++) {
-            GroupKey key = createGroupKey(boatClass, new DegreeBearingImpl(trueWindAngle.getDegrees() + i));
+            GroupKey key = createGroupKey(boatClass, new DegreeBearingImpl(Math.abs(trueWindAngle.getDegrees()) + i));
             if (regressions.containsKey(key)) {
                 speedSum += regressions.get(key).getOrCreatePolynomialFunction().value(windSpeed.getKnots());
                 numberOfSpeeds++;