Should be impl RenderingSystem<'_> { instead of pub struct RenderingSystem<'a> {

[Dajamante]

Hi, It should be impl Rendering system instead of pub struct when trying to do the animation.

I am talking about this function in the book:

// rendering_system.rs
pub struct RenderingSystem<'a> {
    //...
    pub fn get_image(&mut self, renderable: &Renderable, delta: Duration) -> Image {
        let path_index = match renderable.kind() {
            RenderableKind::Static => {
                // We only have one image, so we just return that
                0
            }
            RenderableKind::Animated => {
                // If we have multiple, we want to select the right one based on the delta time.
                // First we get the delta in milliseconds, we % by 1000 to get the seconds only
                // and finally we divide by 250 to get a number between 0 and 4. If it's 4
                // we technically are on the next iteration of the loop (or on 0), but we will let
                // the renderable handle this logic of wrapping frames.
                ((delta.as_millis() % 1000) / 250) as usize
            }
        };

        let image_path = renderable.path(path_index);

        Image::new(self.context, image_path).expect("expected image")
    }
}