Method update

src/app.rs:18–18

(&mut self, _app: &mut App)

    /// note: this will be called after the `app.input` has been updated with the event.
    fn event(&mut self, _app: &mut App, _event: Event) {}
    fn update(&mut self, _app: &mut App) {}
    fn draw(&mut self, _app: &mut App) {}
}