- Chase cam kind of working, need to find a fix for the abrupt direction change.

tags : #story[1273]

src/main/java/seng302/visualiser/cameras/TopDownCamera.java

@@ -1,14 +1,18 @@
 package seng302.visualiser.cameras;
 
 
+import javafx.beans.value.ChangeListener;
+import javafx.beans.value.ObservableValue;
 import javafx.collections.ObservableList;
 import javafx.scene.PerspectiveCamera;
 import javafx.scene.transform.Transform;
 import javafx.scene.transform.Translate;
+import seng302.visualiser.fxObjects.assets_3D.BoatObject;
 
 public class TopDownCamera extends PerspectiveCamera implements RaceCamera {
 
-    ObservableList<Transform> transforms;
+    private ObservableList<Transform> transforms;
+    private BoatObject playerBoat;
 
     public TopDownCamera() {
         super(true);
@@ -16,6 +20,39 @@ public class TopDownCamera extends PerspectiveCamera implements RaceCamera {
         transforms.add(new Translate(0, 0, -125));
     }
 
+    public void setPlayerBoat(BoatObject playerBoat) {
+        this.playerBoat = playerBoat;
+        this.playerBoat.layoutXProperty().addListener(new ChangeListener<Number>() {
+            @Override
+            public void changed(ObservableValue<? extends Number> observable, Number oldValue,
+                Number newValue) {
+                updateCameraX((Double) oldValue, (Double) newValue);
+            }
+        });
+        this.playerBoat.layoutYProperty().addListener(new ChangeListener<Number>() {
+            @Override
+            public void changed(ObservableValue<? extends Number> observable, Number oldValue,
+                Number newValue) {
+                updateCameraY((Double) oldValue, (Double) newValue);
+            }
+        });
+    }
+
+
+    private void updateCameraX(Double oldXValue, Double newXValue) {
+        if (transforms.size() == 0) { // boat is placed and then moved at start,
+            transforms.addAll(
+                new Translate(playerBoat.getLayoutX(), playerBoat.getLayoutY(), -125)
+            );
+        } else {
+            transforms.addAll(new Translate(newXValue - oldXValue, 0, 0));
+        }
+    }
+
+    private void updateCameraY(Double oldYValue, Double newYValue) {
+        transforms.addAll(new Translate(0, (newYValue - oldYValue), 0));
+    }
+
     @Override
     public void zoomIn() {
         transforms.addAll(new Translate(0, 0, 1.5));