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app/src/main/java/org/example/MainComponent.java

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+package org.example;
+
+import org.ngengine.AsyncAssetManager;
+import org.ngengine.components.Component;
+import org.ngengine.components.ComponentManager;
+import org.ngengine.components.fragments.AsyncAssetLoadingFragment;
+import org.ngengine.components.fragments.InputHandlerFragment;
+import org.ngengine.components.fragments.MainViewPortFragment;
+import org.ngengine.gui.components.NLabel;
+import org.ngengine.gui.components.containers.NRow;
+import org.ngengine.gui.win.NWindowManagerComponent;
+import org.ngengine.gui.win.std.NHud;
+import org.ngengine.runner.Runner;
+import org.ngengine.store.DataStoreProvider;
+
+import com.jme3.asset.AssetManager;
+import com.jme3.environment.EnvironmentProbeControl;
+import com.jme3.input.KeyInput;
+import com.jme3.input.event.KeyInputEvent;
+import com.jme3.material.Material;
+import com.jme3.material.Materials;
+import com.jme3.math.ColorRGBA;
+import com.jme3.math.Vector3f;
+import com.jme3.post.FilterPostProcessor;
+import com.jme3.post.filters.ToneMapFilter;
+import com.jme3.renderer.ViewPort;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.shape.Box;
+import com.jme3.util.SkyFactory;
+import com.jme3.util.SkyFactory.EnvMapType;
+
+public class MainComponent implements Component<Object>, AsyncAssetLoadingFragment, MainViewPortFragment, InputHandlerFragment{
+    // In a real-world application, you should probably split this into multiple components
+    
+    private Spatial sky;
+    private EnvironmentProbeControl evp;
+    private Node rootNode;
+    private Node characterNode;
+
+    @Override
+    public void loadAssetsAsync(AsyncAssetManager assetManager) {
+        // load resources
+        sky = SkyFactory.createSky(assetManager, "Sky/citrus_orchard_puresky_4k.hdr", EnvMapType.EquirectMap);
+        evp = new EnvironmentProbeControl(assetManager, 256);
+
+        // Tag sky for environment baking
+        EnvironmentProbeControl.tagGlobal(sky);
+
+        // load character model
+        characterNode = new Node("CharacterNode");
+        Geometry characterGeom = new Geometry("MyCharacter", new Box(1f,1f,1f));
+        characterNode.attachChild(characterGeom);
+
+        // set up material for character
+        Material characterMat = new Material(assetManager, Materials.PBR);
+        characterMat.setColor("BaseColor", ColorRGBA.White);
+        characterMat.setFloat("Metallic", 1.0f);
+        characterMat.setFloat("Roughness", 0.0f);
+        characterGeom.setMaterial(characterMat);       
+        
+    }
+
+
+    @Override
+    public void receiveMainViewPort(ViewPort viewPort) {
+        rootNode = getRootNode(viewPort);
+        viewPort.getCamera().lookAt(Vector3f.ZERO, Vector3f.UNIT_Y);
+    }
+
+    @Override
+    public void loadMainViewPortFilterPostprocessor(AssetManager assetManager, FilterPostProcessor fpp) {
+        ToneMapFilter toneMapFilter = new ToneMapFilter(Vector3f.UNIT_XYZ.mult(1.6f));
+        fpp.addFilter(toneMapFilter);
+    }
+
+    @Override
+    public void onEnable(ComponentManager mng, Runner runner, DataStoreProvider dataStore, boolean firstTime, Object arg) {
+        // Compose the scene
+        rootNode.attachChild(sky);
+        rootNode.addControl(evp);
+        rootNode.attachChild(characterNode);     
+
+        NWindowManagerComponent windowManager = mng.getComponent(NWindowManagerComponent.class);
+        windowManager.showWindow(NHud.class, (win,err)->{
+            if(err != null) {
+                System.err.println("Error showing HUD window: " + err.getMessage());
+                return;
+            }
+            NRow topRow = win.getTop();
+            NLabel label = new NLabel("Use WASD to move the cube");
+            topRow.addChild(label);            
+        });
+    }
+
+    @Override
+    public void onKeyEvent(KeyInputEvent evt) {
+        if(evt.getKeyCode() == KeyInput.KEY_W){
+            characterNode.move(0, 0, -0.1f); // Move character forward
+        } else if(evt.getKeyCode() == KeyInput.KEY_S) {
+            characterNode.move(0, 0, 0.1f); // Move character backward
+        } else if(evt.getKeyCode() == KeyInput.KEY_A) {
+            characterNode.move(-0.1f, 0, 0); // Move character left
+        } else if(evt.getKeyCode() == KeyInput.KEY_D) {
+            characterNode.move(0.1f, 0, 0); // Move character right
+        }
+    }
+
+    @Override
+    public void onDisable(ComponentManager mng, Runner runner, DataStoreProvider dataStore) {
+      
+    }
+
+
+
+    
+}

app/src/main/java/org/example/NGEAppMain.java

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+/*
+ * This source file was generated by the Gradle 'init' task
+ */
+package org.example;
+
+import org.ngengine.NGEApplication;
+import org.ngengine.components.ComponentManager;
+import org.ngengine.gui.win.NWindowManagerComponent;
+import org.ngengine.player.PlayerManagerComponent;
+import com.jme3.system.AppSettings;
+
+public class NGEAppMain {
+    public static void main(String[] args) {
+        AppSettings settings = new AppSettings(true);
+        settings.setRenderer(AppSettings.LWJGL_OPENGL32);
+        settings.setWidth(1280);
+        settings.setHeight(720);
+        settings.setGammaCorrection(true);
+        settings.setSamples(4);
+        settings.setStencilBits(8);
+        settings.setDepthBits(24);
+        settings.setVSync(true);
+        settings.setGraphicsDebug(false);
+        settings.setTitle("Nostr Game Engine Demo");
+        
+
+        Runnable appBuilder = NGEApplication.createApp(
+            settings,
+            app -> {
+                ComponentManager mng = app.getComponentManager();
+                mng.addAndEnableComponent(new PlayerManagerComponent());
+                mng.addAndEnableComponent(new NWindowManagerComponent());
+
+                // Add more components as needed
+                // ...
+            
+                mng.addComponent(new MainComponent(), NWindowManagerComponent.class, PlayerManagerComponent.class);
+                mng.enableComponent(MainComponent.class);
+            }
+        );
+        appBuilder.run();
+    }
+}