method
Tween.parallel
Tween.parallel(a, b) -> bool
Returns whether two handles are both finished. Independent handles are advanced together every frame, so running several at once already runs them in parallel; this is the "wait for all" query over a pair — start a fade and a slide together, then act when both complete. For longer sequences on a single value, chain segments with Tween.chain instead.
Example
program Demo {
property Marker { n: int = 0 }
model M { Marker }
entry {
let fade = Tween.to(255, 0, 20, 0)
let slide = Tween.to(0, 80, 30, 2)
if Tween.parallel(fade, slide) { print(1) } # both done?
quit()
}
}