如何在libGDX中获取摄像头旋转？

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;

public class MyGdxGame extends ApplicationAdapter {
    private OrthographicCamera camera;

    @Override
    public void create() {
        camera = new OrthographicCamera();
        camera.setToOrtho(false, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        // 获取摄像头的旋转角度
        float rotation = camera.rotation;

        // 获取摄像头的绝对旋转角度
        float absoluteRotation = camera.combined.getRotation();

        // 在控制台输出旋转角度
        System.out.println("Rotation: " + rotation);
        System.out.println("Absolute Rotation: " + absoluteRotation);
    }
}