在glium中设置帧重绘速率？

extern crate glium;

use glium::{glutin, Surface};

fn main() {
    // 初始化窗口、OpenGL上下文等
    let events_loop = glutin::event_loop::EventLoop::new();
    let wb = glutin::window::WindowBuilder::new().with_title("Example");
    let cb = glutin::ContextBuilder::new().with_vsync(true);
    let display = glium::Display::new(wb, cb, &events_loop).unwrap();

    // 设置帧重绘速率
    let mut frame_ticks = 0.0;
    let target_fps = 60.0;

    // 主循环
    events_loop.run(move |event, _, control_flow| {
        match event {
            glutin::event::Event::WindowEvent { event, .. } => match event {
                glutin::event::WindowEvent::CloseRequested => *control_flow = glutin::event_loop::ControlFlow::Exit,
                _ => (),
            },
            glutin::event::Event::MainEventsCleared => {
                // 计算帧重绘速率并限制帧率
                let elapsed_ticks = frame_ticks.elapsed().as_secs_f32();
                let target_frame_time = std::time::Duration::from_secs_f32(1.0 / target_fps);
                if elapsed_ticks < target_frame_time.as_secs_f32() {
                    std::thread::sleep(target_frame_time - elapsed_ticks);
                }

                frame_ticks = std::time::Instant::now();

                // 渲染代码
                let mut target = display.draw();
                target.clear_color(0.0, 0.0, 0.0, 1.0);

                // 绘制图形或其他渲染操作

                target.finish().unwrap();
            },
            _ => (),
        }
    });
}