Wind oscillates, replaces random wind with shifting wind. #story[1187]

racevisionGame/src/main/java/mock/app/Event.java

@@ -23,6 +23,8 @@ import javax.xml.bind.JAXBException;
 import javax.xml.parsers.ParserConfigurationException;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
 
 
 /**

racevisionGame/src/main/java/mock/model/wind/ShiftingWindGenerator.java

@@ -13,10 +13,11 @@ public class ShiftingWindGenerator implements WindGenerator {
     double baseLineSpeed;
     double speedVariance = 4;
     double bearingVariance = 5;  // In degrees
-    double oscillationPeriod = 3e6;  // In milliseconds
+    double oscillationVariance = 0.25;
+    double oscillationPeriod = 1e3 * 60 * 1;  // In milliseconds
 
     double timeOfLastOscillationReset = 0;
-    double timeSinceLastChange = 0;
+    double timeOfLastChange = 0;
     double timeSinceLastShift = 0; // Back / veer
 
     boolean oscillationLeft = false;
@@ -42,13 +43,39 @@ public class ShiftingWindGenerator implements WindGenerator {
         oscillateWind(newWind);
         shiftWind(newWind);
         changeWindSpeed(newWind);
+        timeOfLastChange = System.currentTimeMillis();
         return newWind;
     }
 
     private void oscillateWind(Wind wind) {
         double timeSinceLastOscillationReset = System.currentTimeMillis() - timeOfLastOscillationReset;
-        if (oscillationLeft) {
+        double timeSinceLastChange = System.currentTimeMillis() - timeOfLastChange;
+        double newBearing = wind.getWindDirection().degrees();
+        double degreeChange = timeSinceLastChange * 2 * bearingVariance / oscillationPeriod;
+        degreeChange = (1 - oscillationVariance) * degreeChange + (2 * oscillationVariance) * degreeChange * Math.random();
 
+        if (timeSinceLastOscillationReset >= oscillationPeriod) {
+            timeOfLastOscillationReset = System.currentTimeMillis();
+            oscillationLeft = !oscillationLeft;
+        }
+        if (oscillationLeft) {
+            newBearing -= degreeChange;
+            if (newBearing < baselineBearing.degrees() - bearingVariance) {
+                System.out.println(timeSinceLastOscillationReset);
+                oscillationLeft = !oscillationLeft;
+                timeOfLastOscillationReset = System.currentTimeMillis();
+            } else {
+                wind.setWindDirection(Bearing.fromDegrees(newBearing % 360));
+            }
+        } else {
+            newBearing += degreeChange;
+            if (newBearing > baselineBearing.degrees() + bearingVariance) {
+                System.out.println(timeSinceLastOscillationReset);
+                oscillationLeft = !oscillationLeft;
+                timeOfLastOscillationReset = System.currentTimeMillis();
+            } else {
+                wind.setWindDirection(Bearing.fromDegrees(newBearing % 360));
+            }
         }
     }