Add NorthArrow in MeshView

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/CityDoctorController.java

@@ -137,6 +137,8 @@ public class CityDoctorController {
                 mainWindow.getLod4Btn().setDisable(false);
                 mainWindow.getWorldBtn().setDisable(false);
                 mainWindow.getSaveBtn().setDisable(false);
+                mainWindow.getNorthArrow().setVisible(true);
+                mainWindow.alignNorthArrow();
                 setupFeatureTabs();
                 buildTrees();
             });

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/MainWindow.java

@@ -12,6 +12,7 @@ import java.util.TimerTask;
 
 import javax.imageio.ImageIO;
 
+import javafx.scene.chart.NumberAxis;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -268,6 +269,7 @@ public class MainWindow extends Application {
 
     private MainToolBar mainToolBar;
     private SubScene geomScene;
+    private ImageView northArrow;
 
     private static boolean loadFileAtStartup = false;
     private static String inputFile;
@@ -856,9 +858,15 @@ public class MainWindow extends Application {
         meshGroup = new Group();
         world.getChildren().add(meshGroup);
 
+        Image north = new Image(getClass().getResourceAsStream("icons/north.png"));
+        northArrow = new ImageView(north);
+        northArrow.setFitHeight(50);
+        northArrow.setFitWidth(50);
+        meshView.getChildren().add(northArrow);
+        northArrow.setVisible(false);
+
         AmbientLight al = new AmbientLight(Color.WHITE);
         root.getChildren().add(al);
-
         buildCamera();
         cameraXRotation.setAxis(Rotate.X_AXIS);
         cameraZRotation.setAxis(Rotate.Z_AXIS);
@@ -904,6 +912,7 @@ public class MainWindow extends Application {
 
                 cameraZRotation.setAngle(cameraXRot);
                 cameraXRotation.setAngle(cameraYRot);
+                alignNorthArrow();
             }
             if (me.getButton() == MouseButton.SECONDARY) {
                 double translationSpeed = Math.abs(camera.getTranslateZ())/1000;
@@ -927,6 +936,16 @@ public class MainWindow extends Application {
         cameraXRotation.setAngle(cameraYRot);
     }
 
+    public void alignNorthArrow(){
+        double absRotZ = cameraZRotation.getAngle() - 360 * Math.floor(cameraZRotation.getAngle() / 360);
+        double absRotX = cameraXRotation.getAngle() - 360 * Math.floor(cameraXRotation.getAngle() / 360);
+
+        double northRot = ((80 <= absRotX && absRotX <= 260) ?  360-absRotZ: (absRotZ+180)%360 );
+
+        northArrow.setRotate(northRot);
+    }
+
+
     public void addFileNameToTitle(String fileName) {
         String version = Localization.getText(Localization.VERSION);
         stage.setTitle("CityDoctor " + version + " - " + fileName);
@@ -1044,6 +1063,10 @@ public class MainWindow extends Application {
         return mainToolBar.getWorldBtn();
     }
 
+    public ImageView getNorthArrow(){
+        return northArrow;
+    }
+
     public Button getSaveBtn() {
         return mainToolBar.getSaveBtn();
     }