Fades boat opacity every frame during and after race.

- Added TrackPoint with time added and expiry to calculate opacity each frame
- Modified drawTrackPoint to compute colour from TrackPoint alpha
- Removed getTrackPoint from BoatInRace
#pait[jjg64, cbt24]

src/main/java/seng302/Controllers/RaceController.java

@@ -41,8 +41,6 @@ public class RaceController extends Controller {
     Label timer;
     @FXML
     Label FPS;
-    @FXML
-    ComboBox<BoatInRace> visibleTrackSelect;
 
     @FXML
     TableView<BoatInRace> boatInfoTable;
@@ -168,8 +166,6 @@ public class RaceController extends Controller {
         startScreen.setVisible(false);
         ongoingRacePane.setVisible(true);
 
-        visibleTrackSelect.setItems(FXCollections.observableArrayList(startingBoats));
-
         initializeFPS();
         initializeAnnotations();
 
@@ -195,13 +191,6 @@ public class RaceController extends Controller {
         FPS.setText((fps));
     }
 
-    /**
-     *
-     */
-    public void toggleTrackVisibility() {
-        visibleTrackSelect.getSelectionModel().getSelectedItem().setTrackVisible(true);
-    }
-
     /**
      * Set up FPS display at bottom of screen
      */

src/main/java/seng302/Model/BoatInRace.java

@@ -1,6 +1,5 @@
 package seng302.Model;
 
-import javafx.beans.property.IntegerProperty;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.scene.paint.Color;
@@ -28,11 +27,12 @@ public class BoatInRace extends Boat {
     private StringProperty currentLegName;
     private boolean started = false;
     private StringProperty position;
-    private Queue<GPSCoordinate> track = new ConcurrentLinkedQueue<GPSCoordinate>();
+
+    private Queue<TrackPoint> track = new ConcurrentLinkedQueue<TrackPoint>();
     private long nextValidTime = 0;
     private final int TRACK_POINT_TIME_INTERVAL = 1000; // every 1 seconds
     private final int TRACK_POINT_LIMIT = 10;
-    private boolean trackVisible = false;
+    private boolean trackVisible = true;
 
     /**
      * Constructor method.
@@ -262,7 +262,7 @@ public class BoatInRace extends Boat {
         Boolean added = System.currentTimeMillis() >= nextValidTime;
         if (added && this.started) {
             nextValidTime = System.currentTimeMillis() + TRACK_POINT_TIME_INTERVAL;
-            track.add(coordinate);
+            track.add(new TrackPoint(coordinate, System.currentTimeMillis(), TRACK_POINT_LIMIT*TRACK_POINT_TIME_INTERVAL));
             if (track.size() > TRACK_POINT_LIMIT) {
                 track.remove();
             }
@@ -270,7 +270,7 @@ public class BoatInRace extends Boat {
         return added;
     }
 
-    public Queue<GPSCoordinate> getTrack() {
+    public Queue<TrackPoint> getTrack() {
         return track;
     }
 
@@ -281,11 +281,4 @@ public class BoatInRace extends Boat {
     public void setTrackVisible(boolean trackVisible) {
         this.trackVisible = trackVisible;
     }
-
-    public Color getTrackPointColour(int queuePos) {
-        float alphaScale = 1f / (float) (TRACK_POINT_LIMIT);
-        float alpha = 1f - (float) (this.track.size() - queuePos) * alphaScale;
-        Color boatColour = this.colour;
-        return new Color(boatColour.getRed(), boatColour.getBlue(), boatColour.getGreen(), alpha);
-    }
 }

src/main/java/seng302/Model/ResizableRaceCanvas.java

@@ -281,22 +281,21 @@ public class ResizableRaceCanvas extends Canvas {
                 } else {
                     displayBoat(boat, 0);
                 }
-                drawTrackPoint(boat);
 
                 if (raceAnno)
                     displayText(boat.getAbbrev(), boat.getVelocity(), this.map.convertGPS(boat.getCurrentPosition()));
+
+                if(boat.isTrackVisible()) drawTrackPoint(boat);
             }
         }
     }
 
     private void drawTrackPoint(BoatInRace boat) {
-        int queuePos = 0;
-        for (GPSCoordinate coordinate : boat.getTrack()) {
-            GraphCoordinate scaledCoordinate = this.map.convertGPS(coordinate);
-            Color colour = boat.getTrackPointColour(queuePos);
-            gc.setFill(colour);
+        for (TrackPoint point : boat.getTrack()) {
+            GraphCoordinate scaledCoordinate = this.map.convertGPS(point.getCoordinate());
+            Color boatColour = boat.getColour();
+            gc.setFill(new Color(boatColour.getRed(), boatColour.getGreen(), boatColour.getBlue(), point.getAlpha()));
             gc.fillOval(scaledCoordinate.getX(), scaledCoordinate.getY(), 5, 5);
-            queuePos++;
         }
     }
 

src/main/java/seng302/Model/TrackPoint.java

@@ -0,0 +1,26 @@
+package seng302.Model;
+
+import seng302.GPSCoordinate;
+
+/**
+ * Created by cbt24 on 7/04/17.
+ */
+public class TrackPoint {
+    private GPSCoordinate coordinate;
+    private long timeAdded;
+    private long expiry;
+
+    public TrackPoint(GPSCoordinate coordinate, long timeAdded, long expiry) {
+        this.coordinate = coordinate;
+        this.timeAdded = timeAdded;
+        this.expiry = expiry;
+    }
+
+    public GPSCoordinate getCoordinate() {
+        return coordinate;
+    }
+
+    public double getAlpha() {
+        return Double.max(0,1.0 - (double)(System.currentTimeMillis() - timeAdded)/expiry);
+    }
+}

src/main/resources/scenes/racepane.fxml

@@ -77,7 +77,6 @@
                                  <children>
                                     <CheckBox fx:id="showFPS" mnemonicParsing="false" selected="true" text="Show FPS" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="0.0" />
                                     <CheckBox fx:id="showAnnotations" mnemonicParsing="false" selected="true" text="Show Annotation" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="30.0" />
-                                    <ComboBox fx:id="visibleTrackSelect" layoutX="3.0" layoutY="65.0" onAction="#toggleTrackVisibility" prefWidth="150.0" promptText="Visible tracks" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="55.0" />
                                  </children>
                               </AnchorPane>
                           </content>