IObservable <Vector3> DragAsObservable()
{
return(Observable.Defer(() =>
{
var grabbedAt = InputEmulator.GetRealPosition(Controller.Position);
return this.UpdateAsObservable().Select(_ => InputEmulator.GetRealPosition(Controller.Position) - grabbedAt);
}));
}
IObservable <Unit> MoveToRotateAsObservable(IObservable <Vector3> move)
{
return(Observable.Defer(() =>
{
var offset = Target.localPosition;
var length = Mathf.Min(BaseHeight / Mathf.Abs(Mathf.Tan(HMD.Rotation.eulerAngles.x * Mathf.Deg2Rad)), CenterOffsetMax);
var virtualCenter = HMD.Position + Quaternion.Euler(0, HMD.Rotation.eulerAngles.y, 0) * Vector3.forward * length;
var realCenter = InputEmulator.GetRealPosition(virtualCenter);
var startVirtualRotation = InputEmulator.CurrentRotation;
var startRealRotation = InputEmulator.GetRealRotation(HMD.Rotation);
return Observable.Scan(move, (a, b) => a + b * Time.deltaTime)
.Select(movement => Quaternion.Inverse(startRealRotation) * movement * Scale)
.Select(movement => startVirtualRotation * Quaternion.Euler(0, movement.y, 0))
.ForEachAsync(r => SetRotation(offset, startVirtualRotation, realCenter, r));
}));
}