Added tracking for angle between third person boat and next mark

#story[1195]

racevisionGame/src/main/java/visualiser/Controllers/RaceController.java

@@ -27,9 +27,8 @@ import javafx.scene.transform.Translate;
 import javafx.util.Callback;
 import network.Messages.Enums.RaceStatusEnum;
 import shared.dataInput.RaceDataSource;
-import shared.model.CompoundMark;
-import shared.model.Leg;
-import shared.model.Mark;
+import shared.exceptions.BoatNotFoundException;
+import shared.model.*;
 import visualiser.app.App;
 import visualiser.enums.TutorialState;
 import visualiser.gameController.ControllerClient;
@@ -304,6 +303,14 @@ public class RaceController extends Controller {
         // Fix initial bird's-eye position
         view3D.updatePivot(new Translate(250, 0, 210));
 
+        view3D.targetProperty().addListener((o, prev, curr)-> {
+            if(curr != null && visualiserRace.getVisualiserRaceState().isVisualiserBoat(curr.getSourceID())) {
+                addThirdPersonAnnotations(curr);
+            } else {
+                removeThirdPersonAnnotations();
+            }
+        });
+
         // Bind zooming to scrolling
         view3D.setOnScroll(e -> {
             view3D.updateDistance(e.getDeltaY());
@@ -349,6 +356,22 @@ public class RaceController extends Controller {
         });
     }
 
+    private void addThirdPersonAnnotations(Subject3D subject3D) {
+        try {
+            VisualiserBoat boat = visualiserRace.getVisualiserRaceState().getBoat(subject3D.getSourceID());
+            boat.bearingProperty().addListener((o, prev, curr) -> {
+                CompoundMark target = boat.getCurrentLeg().getEndCompoundMark();
+                Bearing headingToMark = GPSCoordinate.calculateBearing(boat.getPosition(), target.getAverageGPSCoordinate());
+                System.out.println(headingToMark.degrees() - boat.getBearing().degrees());
+            });
+        } catch (BoatNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void removeThirdPersonAnnotations() {
+    }
+
     /**
      * Swap the colour of the next mark to pass with the last mark passed
      * @param leg boat has started on