private static void CreateCommandModeObservers(List <IDisposable> observers)
{
observers.Add(_leapObservable
.EnsureOneHande()
.Where(f =>
{
var hand = f.Hands[0];
var avgAngl = hand.Fingers.Average(fi => fi.Direction.AngleTo(hand.Direction));
var palmRotation = Math.Abs(hand.Rotation.z);
return(avgAngl <= CommandAngleSensetivity && // fingers are in the same plain as hand
palmRotation < PalmRotationSensetivity &&
(Math.Abs(hand.PalmVelocity.y) >= CommandVerticalSensetivity || Math.Abs(hand.PalmVelocity.x) >= CommandHorizontalSensetivity)); // ensured movement
})
.Buffer(BufferingWindow) // use Buffer instead of Scan to accumulate multiple values
.Select(b => new VelocityInfo(b.Select(f => f.Hands[0].PalmVelocity.x).Sum(),
b.Select(f => f.Hands[0].PalmVelocity.y).Sum(),
b.Select(f => f.Hands[0].PalmVelocity.z).Sum()))
.Subscribe(new PalmVelocityObserver(_modeSwitchSubject)));
observers.Add(_leapObservable
.EnsureOneHande()
.Where(f =>
{
var hand = f.Hands[0];
var rotation = Math.Abs(hand.Rotation.z);
var avgAngl = hand.Fingers.Average(fi => fi.Direction.AngleTo(hand.Direction)); // react with opened hand only
if (_searchReactionStoped && rotation < PalmRotationSensetivity)
{
// lets react on palm rotations again.
_searchReactionStoped = false;
}
return(rotation > PalmRotationThreshold &&
avgAngl <= CommandAngleSensetivity &&
!_searchReactionStoped);
})
.Subscribe(r =>
{
// stop reacting on next to avoid multiple search "hits"
_searchReactionStoped = true;
WindowsInput.GotoSearch();
}));
}