Function setup_render_loop

pub fn setup_render_loop(
    render_engine: Rc<RefCell<RenderEngine>>,
    waterfall: Rc<RefCell<Waterfall>>,
)

Sets up a render loop for the waterfall.

This function sets up a render loop using requestAnimationFrame(). Each time the the callback triggers, the waterfall is prepared for rendering and the render engine is called. Then, the rendering of the next frame is scheduled using requestAnimationFrame().