Use var sdl_rect : Rect If you ate going to process a lot of them sequentially.
Use var sdl_rect : ref Rect If you only handle those instances individually or if you use OOP or if there is a lot of fields (data) in the object
Use var sdl_rect : Rect If you ate going to process a lot of them sequentially.
Use var sdl_rect : ref Rect If you only handle those instances individually or if you use OOP or if there is a lot of fields (data) in the object