- rect-set! rect #!optional x y w hprocedure
Efficient and convenient way of setting multiple fields of the sdl2:rect. Any arguments that are #f will cause no change to that field. E.g. (rect-set! my-rect 42 #f 1337 #f) will set the "x" field to 42 and the "w" field to 1337, but will not change the "y" or "h" fields. Returns rect after it is modified.