private static IObservable <float> Execute(float start, float end, float duration, Easing.Type easeType, float delayBefore, float delayAfter)
{
var easingMethod = typeof(Easing).GetMethod(easeType.ToString());
object[] methodParams = { 0, start, end - start, duration };
IEnumerator TweenEnumerator(IObserver <float> observer, CancellationToken ct)
{
if (delayBefore > 0)
{
yield return(new WaitForSeconds(delayBefore));
}
if (ct.IsCancellationRequested)
{
observer.OnCompleted();
yield break;
}
if (ct.IsCancellationRequested)
{
observer.OnCompleted();
yield break;
}
float elapsedTime = 0;
float p = 0;
while (elapsedTime < duration)
{
if (ct.IsCancellationRequested)
{
observer.OnCompleted();
yield break;
}
elapsedTime += Time.deltaTime;
methodParams[0] = Math.Min(elapsedTime, duration);
p = Convert.ToSingle(easingMethod?.Invoke(null, methodParams));;
observer.OnNext(p);
yield return(null);
}
if (delayAfter > 0)
{
yield return(new WaitForSeconds(delayAfter));
}
observer.OnCompleted();
}
return(Observable.FromCoroutine <float>(TweenEnumerator));
}
private static IObservable <float> Execute(
GameObject gameObject, float start, float end, float duration, Easing.Type easeType, float delayBefore = 0, float delayAfter = 0)
{
var easingMethod = typeof(Easing).GetMethod(easeType.ToString());
object[] methodParams = { 0, start, end - start, duration };
return
//Observable.Empty<double>()
//.StartWith(() => Time.time)
//.SelectMany(startTime => observable.Select(_ => Time.time - startTime))
(gameObject.UpdateAsObservable()
.Select(_ => Time.deltaTime)
.Scan(0f, (a, b) => a + b)
.TakeWhile(elapsedTime => elapsedTime <= duration)
.Last()
.Select(currentTime =>
{
methodParams[0] = Math.Min(currentTime, duration);
return Convert.ToSingle(easingMethod?.Invoke(null, methodParams));
}));
}