restruct, cleaner hierarchy; much nicer code

src/mightypork/gamecore/audio/SoundSystem.java

@@ -8,7 +8,7 @@ import java.util.Set;
 import mightypork.gamecore.audio.players.EffectPlayer;
 import mightypork.gamecore.audio.players.LoopPlayer;
 import mightypork.gamecore.control.AppAccess;
-import mightypork.gamecore.control.Subsystem;
+import mightypork.gamecore.control.RootBusNode;
 import mightypork.gamecore.control.bus.events.ResourceLoadRequest;
 import mightypork.gamecore.control.interf.Updateable;
 import mightypork.utils.math.Calc.Buffers;
@@ -26,7 +26,7 @@ import org.newdawn.slick.openal.SoundStore;
  * @author MightyPork
  */
 @SuppressWarnings("unchecked")
-public class SoundSystem extends Subsystem implements Updateable {
+public class SoundSystem extends RootBusNode implements Updateable {
 	
 	private static final Coord INITIAL_LISTENER_POS = new Coord(0, 0, 0);
 	private static final int MAX_SOURCES = 256;

src/mightypork/gamecore/control/AppModule.java

@@ -12,12 +12,12 @@ import mightypork.gamecore.render.DisplaySystem;
  * 
  * @author MightyPork
  */
-public abstract class Subsystem extends ChildClient implements AppAccess {
+public abstract class AppModule extends RootBusNode implements AppAccess {
 	
 	private final AppAccess app;
 	
 	
-	public Subsystem(AppAccess app) {
+	public AppModule(AppAccess app) {
 		super(app);
 		
 		this.app = app;

src/mightypork/gamecore/control/AppSubModule.java

@@ -0,0 +1,54 @@
+package mightypork.gamecore.control;
+
+
+import mightypork.gamecore.audio.SoundSystem;
+import mightypork.gamecore.input.InputSystem;
+import mightypork.gamecore.render.DisplaySystem;
+
+
+/**
+ * App event bus client, to be used for subsystems, screens and anything that
+ * needs access to the eventbus
+ * 
+ * @author MightyPork
+ */
+public abstract class AppSubModule extends BusNode implements AppAccess {
+	
+	private final AppAccess app;
+	
+	
+	public AppSubModule(AppAccess app) {
+		super(app);
+		
+		this.app = app;
+	}
+	
+	
+	@Override
+	public final SoundSystem snd()
+	{
+		return app.snd();
+	}
+	
+	
+	@Override
+	public final InputSystem input()
+	{
+		return app.input();
+	}
+	
+	
+	@Override
+	public final DisplaySystem disp()
+	{
+		return app.disp();
+	}
+	
+	
+	@Override
+	public void shutdown()
+	{
+		app.shutdown();
+	}
+	
+}

src/mightypork/gamecore/control/BusNode.java

@@ -8,7 +8,6 @@ import java.util.Set;
 import mightypork.gamecore.control.bus.EventBus;
 import mightypork.gamecore.control.bus.clients.DelegatingClient;
 import mightypork.gamecore.control.bus.clients.ToggleableClient;
-import mightypork.gamecore.control.interf.Destroyable;
 
 
 /**
@@ -17,7 +16,7 @@ import mightypork.gamecore.control.interf.Destroyable;
  * 
  * @author MightyPork
  */
-public abstract class ChildClient implements BusAccess, DelegatingClient, ToggleableClient, Destroyable {
+public abstract class BusNode implements BusAccess, DelegatingClient, ToggleableClient {
 	
 	private BusAccess busAccess;
 	
@@ -26,29 +25,11 @@ public abstract class ChildClient implements BusAccess, DelegatingClient, Toggle
 	private boolean delegating = true;
 	
 	
-	public ChildClient(BusAccess busAccess) {
+	public BusNode(BusAccess busAccess) {
 		this.busAccess = busAccess;
-		
-		bus().subscribe(this);
 	}
 	
 	
-	@Override
-	public final void destroy()
-	{
-		deinit();
-		
-		bus().unsubscribe(this);
-	}
-	
-	
-	/**
-	 * Deinitialize the subsystem<br>
-	 * (called during destruction)
-	 */
-	protected abstract void deinit();
-	
-	
 	@Override
 	public final Collection<Object> getChildClients()
 	{
@@ -77,6 +58,10 @@ public abstract class ChildClient implements BusAccess, DelegatingClient, Toggle
 	 */
 	public final void addChildClient(Object client)
 	{
+		if(client instanceof RootBusNode) {
+			throw new IllegalArgumentException("Cannot nest RootBusNode.");
+		}
+		
 		if (bus().isClientValid(client)) {
 			clients.add(client);
 		}

src/mightypork/gamecore/control/GameLoop.java

@@ -9,7 +9,7 @@ import mightypork.gamecore.control.bus.events.UpdateEvent;
 import mightypork.gamecore.control.timing.TimerDelta;
 
 
-public abstract class GameLoop extends Subsystem implements MainLoopTaskRequest.Listener {
+public abstract class GameLoop extends AppModule implements MainLoopTaskRequest.Listener {
 	
 	private final Queue<Runnable> taskQueue = new ConcurrentLinkedQueue<Runnable>();
 	/** timer */

src/mightypork/gamecore/control/RootBusNode.java

@@ -0,0 +1,35 @@
+package mightypork.gamecore.control;
+
+import mightypork.gamecore.control.interf.Destroyable;
+
+
+/**
+ * Bus node that should be directly attached to the bus.
+ * 
+ * @author MightyPork
+ */
+public abstract class RootBusNode extends BusNode implements Destroyable {
+
+	public RootBusNode(BusAccess busAccess) {
+		super(busAccess);
+
+		bus().subscribe(this);
+	}
+	
+	
+	@Override
+	public final void destroy()
+	{
+		deinit();
+		
+		bus().unsubscribe(this);
+	}
+	
+	
+	/**
+	 * Deinitialize the subsystem<br>
+	 * (called during destruction)
+	 */
+	protected abstract void deinit();
+	
+}

src/mightypork/gamecore/control/bus/EventBus.java

@@ -36,7 +36,7 @@ final public class EventBus implements Destroyable {
 	/** Whether the bus was destroyed */
 	private boolean dead = false;
 	
-	public boolean logSending = false;
+	public boolean detailedLogging = false;
 	
 	
 	/**
@@ -50,7 +50,7 @@ final public class EventBus implements Destroyable {
 	
 	private boolean shallLog(Event<?> event)
 	{
-		if (!logSending) return false;
+		if (!detailedLogging) return false;
 		if (event.getClass().isAnnotationPresent(UnloggedEvent.class)) return false;
 		
 		return true;
@@ -234,6 +234,8 @@ final public class EventBus implements Destroyable {
 		if (client == null) return;
 		
 		clients.add(client);
+		
+		if(detailedLogging) Log.f3("<bus> Client joined: "+Log.str(client));
 	}
 	
 	
@@ -247,6 +249,8 @@ final public class EventBus implements Destroyable {
 		assertLive();
 		
 		clients.remove(client);
+		
+		if(detailedLogging) Log.f3("<bus> Client left: "+Log.str(client));
 	}
 	
 	

src/mightypork/gamecore/gui/renderers/ElementHolder.java

@@ -4,9 +4,8 @@ package mightypork.gamecore.gui.renderers;
 import java.util.LinkedList;
 
 import mightypork.gamecore.control.AppAccess;
-import mightypork.gamecore.control.ChildClient;
+import mightypork.gamecore.control.BusNode;
 import mightypork.gamecore.control.bus.EventBus;
-import mightypork.gamecore.render.Renderable;
 import mightypork.utils.math.constraints.RectConstraint;
 import mightypork.utils.math.coord.Rect;
 
@@ -17,7 +16,7 @@ import mightypork.utils.math.coord.Rect;
  * 
  * @author MightyPork
  */
-public abstract class ElementHolder extends ChildClient implements PluggableRenderable {
+public abstract class ElementHolder extends BusNode implements PluggableRenderable {
 	
 	private final LinkedList<PluggableRenderable> elements = new LinkedList<PluggableRenderable>();
 	private RectConstraint context;
@@ -79,11 +78,4 @@ public abstract class ElementHolder extends ChildClient implements PluggableRend
 		addChildClient(elem);
 	}
 	
-	
-	@Override
-	protected void deinit()
-	{
-		// no impl
-	}
-	
 }

src/mightypork/gamecore/gui/renderers/PluggableRenderable.java

@@ -1,7 +1,6 @@
 package mightypork.gamecore.gui.renderers;
 
 
-import mightypork.gamecore.render.Renderable;
 import mightypork.utils.math.constraints.PluggableContext;
 import mightypork.utils.math.constraints.RectConstraint;
 import mightypork.utils.math.coord.Rect;

src/mightypork/gamecore/gui/renderers/PluggableRenderer.java

@@ -1,7 +1,6 @@
 package mightypork.gamecore.gui.renderers;
 
 
-import mightypork.gamecore.render.Renderable;
 import mightypork.utils.math.constraints.ContextAdapter;
 import mightypork.utils.math.constraints.RectConstraint;
 import mightypork.utils.math.coord.Rect;

src/mightypork/gamecore/gui/renderers/Renderable.java

@@ -1,4 +1,4 @@
-package mightypork.gamecore.render;
+package mightypork.gamecore.gui.renderers;
 
 
 /**

src/mightypork/gamecore/gui/screens/Screen.java

@@ -3,13 +3,13 @@ package mightypork.gamecore.gui.screens;
 
 import static org.lwjgl.opengl.GL11.*;
 import mightypork.gamecore.control.AppAccess;
-import mightypork.gamecore.control.Subsystem;
+import mightypork.gamecore.control.AppSubModule;
 import mightypork.gamecore.control.bus.events.ScreenChangeEvent;
-import mightypork.gamecore.control.interf.Destroyable;
+import mightypork.gamecore.gui.renderers.Renderable;
 import mightypork.gamecore.input.KeyBinder;
 import mightypork.gamecore.input.KeyBindingPool;
 import mightypork.gamecore.input.KeyStroke;
-import mightypork.gamecore.render.Renderable;
+import mightypork.gamecore.render.DisplaySystem;
 import mightypork.utils.math.constraints.RectConstraint;
 import mightypork.utils.math.coord.Coord;
 import mightypork.utils.math.coord.Rect;
@@ -20,7 +20,7 @@ import mightypork.utils.math.coord.Rect;
  * 
  * @author MightyPork
  */
-public abstract class Screen extends Subsystem implements Renderable, Destroyable, KeyBinder, RectConstraint, ScreenChangeEvent.Listener {
+public abstract class Screen extends AppSubModule implements Renderable, KeyBinder, RectConstraint, ScreenChangeEvent.Listener {
 	
 	private final KeyBindingPool keybindings = new KeyBindingPool();
 	
@@ -52,13 +52,6 @@ public abstract class Screen extends Subsystem implements Renderable, Destroyabl
 	}
 	
 	
-	@Override
-	public final void deinit()
-	{
-		deinitScreen();
-	}
-	
-	
 	/**
 	 * Prepare for being shown
 	 * 
@@ -155,26 +148,12 @@ public abstract class Screen extends Subsystem implements Renderable, Destroyabl
 		if (!isActive()) return;
 		
 		if (needSetupViewport) {
-			setupViewport();
+			DisplaySystem.setupOrtho();
 		}
 		
 		renderScreen();
 	}
 	
 	
-	protected void setupViewport()
-	{
-		// fix projection for changed size
-		glMatrixMode(GL_PROJECTION);
-		glLoadIdentity();
-		final Coord s = disp().getSize();
-		glViewport(0, 0, s.xi(), s.yi());
-		glOrtho(0, s.x, s.y, 0, -1000, 1000);
-		
-		// back to modelview
-		glMatrixMode(GL_MODELVIEW);
-	}
-	
-	
 	public abstract String getId();
 }

src/mightypork/gamecore/gui/screens/ScreenLayer.java

@@ -1,11 +1,11 @@
 package mightypork.gamecore.gui.screens;
 
 
-import mightypork.gamecore.control.Subsystem;
+import mightypork.gamecore.control.AppSubModule;
+import mightypork.gamecore.gui.renderers.Renderable;
 import mightypork.gamecore.input.KeyBinder;
 import mightypork.gamecore.input.KeyBindingPool;
 import mightypork.gamecore.input.KeyStroke;
-import mightypork.gamecore.render.Renderable;
 import mightypork.utils.math.constraints.RectConstraint;
 import mightypork.utils.math.coord.Rect;
 
@@ -15,7 +15,7 @@ import mightypork.utils.math.coord.Rect;
  * 
  * @author MightyPork
  */
-public abstract class ScreenLayer extends Subsystem implements Renderable, RectConstraint, KeyBinder {
+public abstract class ScreenLayer extends AppSubModule implements Renderable, RectConstraint, KeyBinder {
 	
 	private final Screen screen;
 	
@@ -56,11 +56,4 @@ public abstract class ScreenLayer extends Subsystem implements Renderable, RectC
 		return screen.getRect();
 	}
 	
-	
-	@Override
-	protected void deinit()
-	{
-		// noimpl
-	}
-	
 }

src/mightypork/gamecore/gui/screens/ScreenRegistry.java

@@ -4,13 +4,13 @@ package mightypork.gamecore.gui.screens;
 import java.util.HashMap;
 
 import mightypork.gamecore.control.AppAccess;
-import mightypork.gamecore.control.Subsystem;
+import mightypork.gamecore.control.AppModule;
 import mightypork.gamecore.control.bus.events.ScreenRequestEvent;
-import mightypork.gamecore.render.Renderable;
+import mightypork.gamecore.gui.renderers.Renderable;
 import mightypork.utils.logging.Log;
 
 
-public class ScreenRegistry extends Subsystem implements ScreenRequestEvent.Listener, Renderable {
+public class ScreenRegistry extends AppModule implements ScreenRequestEvent.Listener, Renderable {
 	
 	private final HashMap<String, Screen> screens = new HashMap<String, Screen>();
 	private Screen active = null;

src/mightypork/gamecore/input/InputSystem.java

@@ -2,11 +2,12 @@ package mightypork.gamecore.input;
 
 
 import mightypork.gamecore.control.AppAccess;
-import mightypork.gamecore.control.Subsystem;
+import mightypork.gamecore.control.RootBusNode;
 import mightypork.gamecore.control.bus.events.KeyboardEvent;
 import mightypork.gamecore.control.bus.events.MouseButtonEvent;
 import mightypork.gamecore.control.bus.events.MouseMotionEvent;
 import mightypork.gamecore.control.interf.Updateable;
+import mightypork.gamecore.render.DisplaySystem;
 import mightypork.rogue.events.ActionRequest;
 import mightypork.rogue.events.ActionRequest.RequestType;
 import mightypork.utils.math.constraints.NumberConstraint;
@@ -18,14 +19,12 @@ import org.lwjgl.input.Mouse;
 import org.lwjgl.opengl.Display;
 
 
-public class InputSystem extends Subsystem implements Updateable, KeyBinder {
+public class InputSystem extends RootBusNode implements Updateable, KeyBinder {
 	
 	// listeners
 	private final KeyBindingPool keybindings;
-	private boolean yAxisDown = true;
-	private static boolean inited = false;
-	
 	
+	private static boolean inited = false;
 	public InputSystem(AppAccess app) {
 		super(app);
 		
@@ -113,7 +112,7 @@ public class InputSystem extends Subsystem implements Updateable, KeyBinder {
 		final Coord move = new Coord(Mouse.getEventDX(), Mouse.getEventDY());
 		final int wheeld = Mouse.getEventDWheel();
 		
-		if (yAxisDown) {
+		if (DisplaySystem.yAxisDown) {
 			flipScrY(pos);
 			move.mul_ip(1, -1, 1);
 		}
@@ -137,23 +136,9 @@ public class InputSystem extends Subsystem implements Updateable, KeyBinder {
 	}
 	
 	
-	private void flipScrY(Coord c)
+	private static void flipScrY(Coord c)
 	{
-		if (disp() != null) {
+		if (DisplaySystem.yAxisDown) c.setY_ip(DisplaySystem.getSize().y - c.y);
-			c.setY_ip(disp().getSize().y - c.y);
-		}
-	}
-	
-	
-	/**
-	 * Set whether Y axis should go top-down instead of LWJGL default bottom-up.<br>
-	 * Default = true.
-	 * 
-	 * @param yAxisDown
-	 */
-	public void setYDown(boolean yAxisDown)
-	{
-		this.yAxisDown = yAxisDown;
 	}
 	
 	
@@ -162,7 +147,7 @@ public class InputSystem extends Subsystem implements Updateable, KeyBinder {
 	 * 
 	 * @return mouse position
 	 */
-	public Coord getMousePos()
+	public static Coord getMousePos()
 	{
 		final Coord pos = new Coord(Mouse.getX(), Mouse.getY());
 		flipScrY(pos);
@@ -175,7 +160,7 @@ public class InputSystem extends Subsystem implements Updateable, KeyBinder {
 		Mouse.setGrabbed(grab);
 	}
 	
-	private final NumberConstraint cmousex = new NumberConstraint() {
+	public static final NumberConstraint mouseX = new NumberConstraint() {
 		
 		@Override
 		public double getValue()
@@ -184,7 +169,7 @@ public class InputSystem extends Subsystem implements Updateable, KeyBinder {
 		}
 	};
 	
-	private final NumberConstraint cmousey = new NumberConstraint() {
+	public static final NumberConstraint mouseY = new NumberConstraint() {
 		
 		@Override
 		public double getValue()
@@ -192,16 +177,4 @@ public class InputSystem extends Subsystem implements Updateable, KeyBinder {
 			return getMousePos().y;
 		}
 	};
-	
-	
-	public NumberConstraint c_mouse_x()
-	{
-		return cmousex;
-	}
-	
-	
-	public NumberConstraint c_mouse_y()
-	{
-		return cmousey;
-	}
 }

src/mightypork/gamecore/render/DisplaySystem.java

@@ -11,7 +11,7 @@ import java.nio.ByteBuffer;
 import javax.imageio.ImageIO;
 
 import mightypork.gamecore.control.AppAccess;
-import mightypork.gamecore.control.Subsystem;
+import mightypork.gamecore.control.RootBusNode;
 import mightypork.gamecore.control.bus.events.ScreenChangeEvent;
 import mightypork.utils.logging.Log;
 import mightypork.utils.math.constraints.RectConstraint;
@@ -24,10 +24,11 @@ import org.lwjgl.opengl.Display;
 import org.lwjgl.opengl.DisplayMode;
 
 
-public class DisplaySystem extends Subsystem implements RectConstraint {
+public class DisplaySystem extends RootBusNode implements RectConstraint {
 	
 	private DisplayMode windowDisplayMode;
 	private int targetFps;
+	public static boolean yAxisDown = true;
 	
 	
 	public DisplaySystem(AppAccess app) {
@@ -105,7 +106,7 @@ public class DisplaySystem extends Subsystem implements RectConstraint {
 	}
 	
 	
-	public Screenshot takeScreenshot()
+	public static Screenshot takeScreenshot()
 	{
 		glReadBuffer(GL_FRONT);
 		final int width = Display.getDisplayMode().getWidth();
@@ -135,7 +136,7 @@ public class DisplaySystem extends Subsystem implements RectConstraint {
 	 * 
 	 * @return is fullscreen
 	 */
-	public boolean isFullscreen()
+	public static boolean isFullscreen()
 	{
 		return Display.isFullscreen();
 	}
@@ -146,19 +147,19 @@ public class DisplaySystem extends Subsystem implements RectConstraint {
 	 * 
 	 * @return size
 	 */
-	public Coord getSize()
+	public static Coord getSize()
 	{
 		return new Coord(getWidth(), getHeight());
 	}
 	
 	
-	public int getWidth()
+	public static int getWidth()
 	{
 		return Display.getWidth();
 	}
 	
 	
-	public int getHeight()
+	public static int getHeight()
 	{
 		return Display.getHeight();
 	}
@@ -238,4 +239,19 @@ public class DisplaySystem extends Subsystem implements RectConstraint {
 			ImageIO.write(getImage(), "PNG", file);
 		}
 	}
+	
+	
+	public static void setupOrtho()
+	{
+		// fix projection for changed size
+		glMatrixMode(GL_PROJECTION);
+		glLoadIdentity();
+		final Coord s = getSize();
+		glViewport(0, 0, s.xi(), s.yi());
+		glOrtho(0, s.x, (yAxisDown ? 1 : -1) * s.y, 0, -1000, 1000);
+		
+		// back to modelview
+		glMatrixMode(GL_MODELVIEW);
+		
+	}
 }

src/mightypork/rogue/App.java

@@ -144,7 +144,7 @@ public class App implements AppAccess {
 		 */
 		Log.f2("Initializing Event Bus...");
 		eventBus = new EventBus();
-		eventBus.logSending = true;
+		eventBus.detailedLogging = true;
 		initChannels();
 		
 		/*

src/mightypork/rogue/MainLoop.java

@@ -2,8 +2,8 @@ package mightypork.rogue;
 
 
 import mightypork.gamecore.control.GameLoop;
+import mightypork.gamecore.gui.renderers.Renderable;
 import mightypork.gamecore.input.Action;
-import mightypork.gamecore.render.Renderable;
 import mightypork.rogue.events.ActionRequest;
 import mightypork.rogue.events.ActionRequest.RequestType;
 import mightypork.rogue.util.Utils;
@@ -56,7 +56,7 @@ public class MainLoop extends GameLoop implements ActionRequest.Listener {
 		public void execute()
 		{
 			Res.getEffect("gui.shutter").play(1);
-			Utils.runAsThread(new TaskTakeScreenshot(disp()));
+			Utils.runAsThread(new TaskTakeScreenshot());
 		}
 	};
 	

src/mightypork/rogue/Res.java

@@ -7,13 +7,13 @@ import mightypork.gamecore.audio.players.LoopPlayer;
 import mightypork.gamecore.control.AppAccess;
 import mightypork.gamecore.loading.AsyncResourceLoader;
 import mightypork.gamecore.render.fonts.DeferredFont;
+import mightypork.gamecore.render.fonts.DeferredFont.FontStyle;
 import mightypork.gamecore.render.fonts.FontBank;
 import mightypork.gamecore.render.fonts.GLFont;
-import mightypork.gamecore.render.fonts.DeferredFont.FontStyle;
-import mightypork.gamecore.render.textures.TextureBank;
-import mightypork.gamecore.render.textures.TxQuad;
 import mightypork.gamecore.render.textures.FilteredTexture.Filter;
 import mightypork.gamecore.render.textures.FilteredTexture.Wrap;
+import mightypork.gamecore.render.textures.TextureBank;
+import mightypork.gamecore.render.textures.TxQuad;
 
 import org.newdawn.slick.opengl.Texture;
 

src/mightypork/rogue/TaskTakeScreenshot.java

@@ -17,8 +17,8 @@ public class TaskTakeScreenshot implements Runnable {
 	private final Screenshot scr;
 	
 	
-	public TaskTakeScreenshot(DisplaySystem disp) {
+	public TaskTakeScreenshot() {
-		scr = disp.takeScreenshot();
+		scr = DisplaySystem.takeScreenshot();
 	}
 	
 	

src/mightypork/rogue/screens/test_cat_sound/LayerFlyingCat.java

@@ -12,8 +12,10 @@ import mightypork.gamecore.gui.renderers.TextRenderer;
 import mightypork.gamecore.gui.renderers.TextRenderer.Align;
 import mightypork.gamecore.gui.screens.Screen;
 import mightypork.gamecore.gui.screens.ScreenLayer;
+import mightypork.gamecore.input.InputSystem;
 import mightypork.gamecore.input.KeyStroke;
 import mightypork.gamecore.input.Keys;
+import mightypork.gamecore.render.DisplaySystem;
 import mightypork.rogue.Res;
 import mightypork.utils.math.animation.AnimDouble;
 import mightypork.utils.math.animation.Easing;
@@ -37,8 +39,8 @@ public class LayerFlyingCat extends ScreenLayer implements Updateable, MouseButt
 	public LayerFlyingCat(Screen screen) {
 		super(screen);
 		
-		xPos.setTo(disp().getWidth() / 2);
+		xPos.setTo(DisplaySystem.getWidth() / 2);
-		yPos.setTo(disp().getHeight() / 2);
+		yPos.setTo(DisplaySystem.getHeight() / 2);
 		
 		cat = new ImageRenderer(Res.getTxQuad("test.kitten"));
 		cat.setContext(c_centered(c_box(this, c_n(size), c_n(size)), c_n(xPos), c_n(yPos)));
@@ -46,8 +48,8 @@ public class LayerFlyingCat extends ScreenLayer implements Updateable, MouseButt
 		//@formatter:off
 		final RectConstraint flyingFontBox = c_centered(
 				c_box(this, c_n(0), c_n(64)),
-				input().c_mouse_x(),
+				InputSystem.mouseX,
-				input().c_mouse_y()
+				InputSystem.mouseY
 		);
 		//@formatter:on
 		
@@ -59,8 +61,8 @@ public class LayerFlyingCat extends ScreenLayer implements Updateable, MouseButt
 			@Override
 			public void run()
 			{
-				xPos.fadeTo(disp().getWidth() / 2, 2);
+				xPos.fadeTo(DisplaySystem.getWidth() / 2, 2);
-				yPos.fadeTo(disp().getHeight() / 2, 2);
+				yPos.fadeTo(DisplaySystem.getHeight() / 2, 2);
 			}
 		});
 	}