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An Avar.t is a variable that evolves in time. It is updated at every frame (i.e. every iteration of the main loop). Bogue uses Avars for animations.
val create : ?duration:Time.t -> ?init:callback -> ?ending:callback -> ?finished:bool -> ?update:('a t -> float -> 'a) -> 'a -> 'a t
Generic Avar creation. If
finished = true, the var never gets further updated, ie behaves like a normal variable. Otherwise, the
update parameter is compulsory.
apply f v creates a new Avar by composing with f; the old Avar
v is still active
fromto x1 x2 creates a integer Avar.t with initial value
x1 and, as time elapses, moves continuously to
x2, with a final slowdown.
fromto but with uniform speed (no slowdown).
val oscillate : ?duration:int -> ?frequency:float -> int -> int -> int t
oscillate amplitude x0 will oscillate with the given amplitude around the initial value
val var : 'a -> 'a t
Create an Avar which behaves like a normal Var (no animation).
val get : 'a t -> 'a
Start the animation (if necessary) and compute the current value of the variable.
val progress : 'a t -> float
progress v is a float in [0,1] giving the percentage of the animation when the last
v.value was computed. In case of infinite animation, this is just the elapsed Time (in ms).