Map can be zoomed in / out at all times.

- map can be zoomed when object is not selected

#story[1312]

racevisionGame/src/main/java/visualiser/layout/View3D.java

@@ -204,7 +204,7 @@ public class View3D extends Pane {
     /**
      * Stop camera from following the last selected subject
      */
-    private void untrackSubject() {
+    public void untrackSubject() {
         if(target.get() != null) {
             trackBoat.stop();
             target.setValue(null);
@@ -215,7 +215,7 @@ public class View3D extends Pane {
      * Set camera to follow the selected subject
      * @param subject to track
      */
-    private void trackSubject(Subject3D subject) {
+    public void trackSubject(Subject3D subject) {
         target.set(subject);
 
         this.trackBoat = new AnimationTimer() {
@@ -265,17 +265,18 @@ public class View3D extends Pane {
      * @param delta amount to change distance by
      */
     public void updateDistance(double delta) {
-        double distance = -this.distance.getZ() + delta;
-
-        if(distance <= ZOOM_IN_LIMIT) {
+        double newDistance = -this.distance.getZ() + delta;
+        if (target.get() == null){
+            setDistance(newDistance);
+        } else if(newDistance <= ZOOM_IN_LIMIT) {
             setDistance(ZOOM_IN_LIMIT);
-        } else if (distance > ZOOM_OUT_LIMIT){
+        } else if (newDistance > ZOOM_OUT_LIMIT){
             untrackSubject();
             setDistance(1050);
             updatePivot(new Translate(250, 0, 210));
             setYaw(0);
         } else {
-            setDistance(distance);
+            setDistance(newDistance);
         }
         adjustPitchForZoom();
         adjustScaleForZoom();
@@ -294,7 +295,6 @@ public class View3D extends Pane {
             itemScale = 0.1;
             // if zoomed right out
         } else if (itemScale > 1) {
-            System.out.println("over 1");
             itemScale = 1;
         }