protected virtual void Update()
{
if (provider == null)
{
Debug.LogError("No provider set for " + this.GetType().Name
+ " in " + this.name + "; you should sure that there is a LeapProvider in "
+ "your scene and that this component has a LeapProvider reference.", this);
this.enabled = false;
}
_wasActivated = false;
_wasDeactivated = false;
_wasCancelled = false;
_wasFinished = false;
var hand = provider.Get(whichHand);
// Determine the tracked state of hands and fire appropriate methods.
_isHandTracked = hand != null;
if (isHandTracked != _wasHandTracked)
{
if (isHandTracked)
{
WhenHandBecomesTracked(hand);
}
else
{
WhenHandLosesTracking(whichHand == Chirality.Left);
}
}
if (isHandTracked)
{
WhileHandTracked(hand);
}
else
{
WhileHandUntracked(whichHand == Chirality.Left);
}
_wasHandTracked = isHandTracked;
// Determine whether or not the gesture should be active or inactive.
bool shouldGestureBeActive;
DeactivationReason?deactivationReason = null;
if (!isHandTracked)
{
shouldGestureBeActive = false;
}
else
{
if (!_isActive)
{
if (ShouldGestureActivate(hand))
{
shouldGestureBeActive = true;
}
else
{
shouldGestureBeActive = false;
}
}
else
{
if (ShouldGestureDeactivate(hand, out deactivationReason))
{
shouldGestureBeActive = false;
}
else
{
shouldGestureBeActive = true;
}
}
}
// If the deactivation reason is not set, we assume the gesture completed
// successfully.
bool wasGestureSuccessful = deactivationReason.GetValueOrDefault()
== DeactivationReason.FinishedGesture;
// Fire gesture state change events.
if (shouldGestureBeActive != _isActive)
{
if (shouldGestureBeActive)
{
_wasActivated = true;
_isActive = true;
WhenGestureActivated(hand);
OnGestureActivated();
OnOneHandedGestureActivated(hand);
}
else
{
_wasDeactivated = true;
if (wasGestureSuccessful)
{
_wasFinished = true;
}
else
{
_wasCancelled = true;
}
_isActive = false;
WhenGestureDeactivated(hand, deactivationReason.GetValueOrDefault());
OnGestureDeactivated();
OnOneHandedGestureDeactivated(hand);
}
}
// Fire per-update events.
if (_isActive)
{
WhileGestureActive(hand);
}
else
{
WhileGestureInactive(hand);
}
}