On May 3, 2012, at 8:24 AM, Laurine Harbulot wrote: > Hello all, > We're students and we're working on a space invaders project. > > Our game runs very well but we've got a problem: > We would like to give the opportunity to players to press two keyboards > buttons at the same time but for now,our program tests only one event at the > same time. > Is there a solution for that ?
It depends on several factors. (A) If you are using the racket/gui library, the answer is "yes in many ways." (B) The way you asked this question, however, makes me think that you are using 2htdp/universe, in which case it depends on what you mean by "simultaneously". If you mean something like "a player hits control and a simultaneously", then the answer is "no". If you mean "two players use one keyboard to play against each other", I recommend that you check up on "on-pad" a relatively new way of dealing with keyboard events. More generally, 2htdp/universe is a student library, mostly intended for beginners even at young ages (14 years, say) and as such makes a compromise between simplicity and expressiveness. "Simultaneous" in the first sense was one of the features I sacrificed for this design. Now it is possible that you have a different sense of "simultaneous" in mind, in which case I recommend you ask again, ideally with a code snippet or a scenario description that spells out the details. -- Matthias ____________________ Racket Users list: http://lists.racket-lang.org/users
