How can I have AnimationController play the loaded animation ?

I’ve managed loaded a simple animation in a test. I’m pretty sure the animation nodes, channels are built correctly. But when I debugged into com.badlogic.gdx.graphics.g3d.utils.AnimationController#update(float), it’s current AnimationDesc member is null. Does this means it’s not started playing? How can I have AnimationController update the loaded animation?

FYI. the test code and assets

public class AnimationLoaderTest extends Game {

	public static void main(String[] args) {
		new LwjglApplication(new AnimationLoaderTest());
	}

	private Scene scene;
	private SceneManager sceneManager;
	private PerspectiveCamera camera;
	private SceneAsset sceneAsset;

	@Override
	public void create() {
		sceneAsset = new GLTFLoader().load(Gdx.files.classpath("gltftutorials/khronosgroup/github/simple.gltf"));
		scene = new Scene(sceneAsset.scene);
		sceneManager = new SceneManager();
		sceneManager.addScene(scene);
		
		// setup camera
		camera = new PerspectiveCamera(60f, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
		camera.near = 0.01f;
		camera.far =  4000f;
		camera.position.set(0, 0, 3);
		camera.lookAt(Vector3.Zero);
		sceneManager.setCamera(camera);
	}

	@Override
	public void render() {
		float deltaTime = Gdx.graphics.getDeltaTime();
		camera.update();
		// render
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
		sceneManager.update(deltaTime);
		sceneManager.render();
	}
}

simple.gltf

[mgsx-dev]

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[mgsx-dev]

your animation need a name to be usable with libgdx, i don’t think this tutorial is a good way to start, better exporting a scene from Blender instead. Or downloading a GLTF file.