public static IObservable <double> LowPass(
this IObservable <double> targets,
double amount = 0.5,
double tolerance = double.Epsilon)
{
return(targets.Animate((from, to) =>
Application
.PerFrame
.Scan(from, (current, frame) => to * (1 - amount) + current * amount)
.TakeWhile(result => Math.Abs(result - to) > tolerance)
.Concat(Observable.Return(to))));
}
public static IObservable <double> QuintEaseOut(
this IObservable <double> targets,
TimeSpan duration)
{
const double fps = 60.0;
var durationInFrames = (int)(duration.TotalSeconds * fps);
return(targets.Animate((from, to) =>
{
var easingFunc = QuintEaseOut(durationInFrames, from, to);
return Application
.PerFrame
.Select((i, j) => (long)j)
.Take(durationInFrames)
.Select(easingFunc)
.Concat(Observable.Return(to));
}));
}