kind of a question, kind of an answer.
playing around with sending / receiving osc messages during
performances. what I'd like to do is attach certain functions to
certain osc messages, with varying numbers of arguments. so I did.
how does this look? is there a better way of doing this?
2 files included here, run 2 instances of fluxus and try sending osc
msgs back and forth to make the "mouse cursor" move on one while you
move the mouse on the other.
cheers
evan
;----- begin osc-send-test.scm
;----- send some mouse data
(osc-destination "osc.udp://localhost:3333")
(define (send-mouse)
(osc-send "/mouse" "ii" (list (mouse-x) (mouse-y)))
)
(every-frame (send-mouse))
;----- begin osc-receive-test.scm
;----- attach a function to an osc message and a list of expected values
(osc-source "3333")
;--- this is just a utility function for printing out the 1st osc
message
(define (print-osc-msgs path val)
(cond [(not (osc-msg path))
val]
[else
(let [(result (osc 0))]
(printf "~s: ~s" path result)
(print-osc-msgs path result)
)
]
)
)
;--- run a function on an osc message with a list of arguments (osc
values indices)
;--- ex: to get both values of the osc message "/mouse 10 20" you'll
need to match the
;--- path "/mouse" and then two arguments, index 0 (10) and index 1 (20)
(define (osc-func path func args val)
(cond [(not (osc-msg path))
#f]
[else
(let [(osc-args (list))]
(for [(n args)]
;(printf "~s: ~s ~s" path msg0 msg1)(newline)
(set! osc-args (append osc-args (list (osc n))))
)
(func osc-args)
(osc-func path func args #t)
)
]
)
)
;--- scale a mouse x value to world coordinates
(define (mouse-pos-x x)
(* 20 (- (/ x (vector-ref (get-screen-size) 0)) 0.5)))
;--- scale a mouse y value to world coordinates
(define (mouse-pos-y y)
(* 15 (- (- 1 (/ y (vector-ref (get-screen-size) 1))) 0.5)))
;--- make something visual
(define p (build-plane))
(define (render)
;(printf "~a~n" (osc-peek))
(osc-func "/mouse"
(lambda (args)
(cond [args
(with-primitive p
(let [(x (list-ref args 0)) (y (list-ref args
1))]
(identity)
(translate (vector (mouse-pos-x x) (mouse-
pos-y y) 0))
))
])
)
(list 0 1)
#t)
(print-osc-msgs "/volume" 0)
(print-osc-msgs "/pitch" 0)
(print-osc-msgs "/key_note" 0)
)
(every-frame (render))
