private static final float WIDTH = 1200;
    private static final float HEIGHT = 800;

    private double anchorX, anchorY;
    private double anchorAngleX = 0;
    private double anchorAngleY = 0;
    private final DoubleProperty angleX = new SimpleDoubleProperty(0);
    private final DoubleProperty angleY = new SimpleDoubleProperty(0);

    private final Sphere sphere = new Sphere(150);