public static float getGrabStrength(GrabbingInfoSettings settings, Hand hand, InteractionObject volume, bool isCurrentlyGrabbing)
{
GrabbingInfoCalculator calculator = getCalculator(settings, hand, volume);
calculator.ensureUpdated(hand, isCurrentlyGrabbing);
return(calculator.grabValue);
}
private const long CALCULATOR_FRAME_TIMEOUT = 60; //number of frames to pass before a calculator can be recycled
private static GrabbingInfoCalculator getCalculator(GrabbingInfoSettings settings, Hand hand, InteractionObject volume)
{
HandObjectPair key = new HandObjectPair(hand.Id, volume);
long frameId = hand.Frame.Id;
int index = -1;
if (!_indexMap.TryGetValue(key, out index))
{
for (int i = 0; i < _calculators.Count; i++)
{
if (_calculators[i].lastUpdatedFrameId < frameId - CALCULATOR_FRAME_TIMEOUT)
{
_calculators[i].reset(settings, volume);
_indexMap[key] = i;
return(_calculators[i]);
}
}
GrabbingInfoCalculator newCalculator = new GrabbingInfoCalculator(settings, volume);
_indexMap[key] = _calculators.Count;
_calculators.Add(newCalculator);
return(newCalculator);
}
return(_calculators[index]);
}
public void reset(GrabbingInfoSettings newSettings, InteractionObject targetVolume)
{
if (newSettings != _settings)
{
_settings = newSettings;
_valueCalculators.Clear();
_valueCalculators.Add(new FingerProximityCalculator(this, _settings.fingerProximity, ValueType.GRAB));
_valueCalculators.Add(new FingerGrabbingPoseCalculator(this, _settings.fingerGrabbingPose, ValueType.GRAB));
_valueCalculators.Add(new FingerGrabbingSpeedCalculator(this, _settings.fingerGrabbingSpeed, ValueType.GRAB));
_valueCalculators.Add(new FingerReleasingPoseCalculator(this, _settings.fingerReleasingPose, ValueType.RELEASE));
_valueCalculators.Add(new FingerReleasingSpeedCalculator(this, _settings.fingerReleasingSpeed, ValueType.RELEASE));
_valueCalculators.Add(new HandPalmDirectionCalculator(this, _settings.handPalmDirection, ValueType.RELEASE));
_valueCalculators.Add(new HandPalmDistanceReleaseCalculator(this, _settings.handPalmDistanceRelease, ValueType.RELEASE));
_valueCalculators.Add(new HandMovementRateCalculator(this, _settings.movementRate, ValueType.STABILITY));
_valueCalculators.Add(new HandRotationRateCalculator(this, _settings.rotationRate, ValueType.STABILITY));
}
else
{
foreach (IValueCalculator c in _valueCalculators)
{
c.reset();
}
}
_targetVolume = targetVolume;
}
void Awake()
{
_instance = this;
_grabbingInfoSettings = GetComponent <GrabbingInfoSettings>();
}
public static bool shouldRelease(GrabbingInfoSettings settings, Hand hand, InteractionObject volume)
{
return(getGrabStrength(settings, hand, volume, true) < settings.releaseGrabThreshold.x);
}
public static bool shouldGrab(GrabbingInfoSettings settings, Hand hand, InteractionObject volume)
{
return(getGrabStrength(settings, hand, volume, false) > settings.releaseGrabThreshold.y);
}
public GrabbingInfoCalculator(GrabbingInfoSettings settings, InteractionObject targetVolume)
{
reset(settings, targetVolume);
}
void Awake()
{
_instance = this;
_grabbingInfoSettings = GetComponent<GrabbingInfoSettings>();
}
