Reset the center of the camera when changing the displayed root

src/main/java/fr/ill/ics/n3d/Nomad3DEditor.java

@@ -417,13 +417,21 @@ public class Nomad3DEditor extends Application {
 		buildEventHandlers(axesGroup);
 		
 		// Initialize the camera position
-		Bounds rootBounds = this.model.getRoot().getSceneNode().localToScene(this.model.getRoot().getSceneNode().getBoundsInLocal());
+		resetCamera(this.model.getRoot());
+
+		return scene;
+	}
+	
+	/**
+	 * Sets the camera center and zoom according to the component.
+	 * @param component
+	 */
+	private void resetCamera(Component component) {
+		Bounds rootBounds = component.getSceneNode().localToScene(component.getSceneNode().getBoundsInLocal());
 		Point3D rootCenter = new Point3D(rootBounds.getMinX(), rootBounds.getMinY(), rootBounds.getMinZ());
 		rootCenter = rootCenter.add(rootBounds.getWidth() / 2.0, rootBounds.getHeight() / 2.0, rootBounds.getDepth() / 2.0);
 		this.controls.setCenter(rootCenter);
 		this.controls.zoom(-1.0 * ((new Point3D(rootBounds.getWidth(), rootBounds.getHeight(), rootBounds.getDepth())).magnitude()), false, false);
-
-		return scene;
 	}
 	
 	/**
@@ -695,10 +703,20 @@ public class Nomad3DEditor extends Application {
 	    }
 	}
 
-	public void setComponentAsRoot(Component component) {
+	/**
+	 * Sets the component as the displayed root.
+	 * The tree view is modified as well as the camera to change the center to the displayed component.
+	 * @param component
+	 */
+	public void setDisplayedRootComponent(Component component) {
 		
+		// Set the components that are not in the hierarchy of the new root component invisible. 
 		Nomad3DEditor.getInstance().getModel().getRoot().resetVisible(component);		
 		
-		menuBar.setDisplayedRoot(component);
+		// Change the tree view.
+		menuBar.setDisplayedRootComponent(component);
+		
+		// Change the center of the camera.
+		resetCamera(component);
 	}
 }

src/main/java/fr/ill/ics/n3d/gui/EditorMenuBar.java

@@ -3001,7 +3001,7 @@ public class EditorMenuBar extends MenuBar {
 		updateScene(Nomad3DEditor.getInstance().getModel().getDisplayedRoot());
 	}
 	
-	public void setDisplayedRoot(Component component) {
+	public void setDisplayedRootComponent(Component component) {
 		
 		// Save the expanded state of the tree items.
 		HashMap<String, Boolean> itemStates = Nomad3DEditor.getInstance().getTreeViewExpandedStates(component.getTreeItem());

src/main/java/fr/ill/ics/n3d/gui/HierarchyCell.java

@@ -63,7 +63,7 @@ public class HierarchyCell extends CheckBoxTreeCell<Component> {
 				Component component = getItem();
 				
 				// Set it as the displayed root.
-				Nomad3DEditor.getInstance().setComponentAsRoot(component);
+				Nomad3DEditor.getInstance().setDisplayedRootComponent(component);
 			}
 		});
 		
@@ -73,7 +73,7 @@ public class HierarchyCell extends CheckBoxTreeCell<Component> {
 		displayAllTheComponentsItem.setOnAction(new EventHandler<ActionEvent>() {
 			public void handle(ActionEvent t) {
 				// Reset with the root component.
-				Nomad3DEditor.getInstance().setComponentAsRoot(Nomad3DEditor.getInstance().getModel().getRoot());
+				Nomad3DEditor.getInstance().setDisplayedRootComponent(Nomad3DEditor.getInstance().getModel().getRoot());
 			}
 		});