protected virtual void ComputeBestSnapAddress(ref SnapAddress snapAddress)
{
IEnumerable<HandGrabInteractable> interactables = HandGrabInteractable.Registry.List(this);
float bestFingerScore = -1f;
float bestPoseScore = -1f;
foreach (HandGrabInteractable interactable in interactables)
{
float fingerScore = 1.0f;
if (!HandGrab.ComputeShouldSelect(this, interactable, out GrabTypeFlags selectingGrabTypes))
{
fingerScore = HandGrab.ComputeHandGrabScore(this, interactable, out selectingGrabTypes);
}
if (fingerScore < bestFingerScore)
{
continue;
}
bool usePinchPoint = CanSnapToPinchPoint(interactable, selectingGrabTypes);
Pose grabPoint = usePinchPoint ? _trackedPinchPose : _trackedGripPose;
bool poseFound = interactable.CalculateBestPose(grabPoint, Hand.Scale, Hand.Handedness,
ref _cachedBestHandPose, ref _cachedBestSnapPoint,
out bool usesHandPose, out float poseScore);
if (!poseFound)
{
continue;
}
if (fingerScore > bestFingerScore
|| poseScore > bestPoseScore)
{
bestFingerScore = fingerScore;
bestPoseScore = poseScore;
HandPose handPose = usesHandPose ? _cachedBestHandPose : null;
snapAddress.Set(interactable, handPose, _cachedBestSnapPoint, usePinchPoint);
}
}
if (bestFingerScore < 0)
{
snapAddress.Clear();
}
}
/// <summary>
/// Each call while the interactor is hovering, it checks whether there is an interaction
/// being hovered and sets the target snapping address to it. In the HandToObject snapping
/// behaviors this is relevant as the hand can approach the object progressively even before
/// a true grab starts.
/// </summary>
protected override void DoHoverUpdate()
{
base.DoHoverUpdate();
if (_currentSnap.IsValidAddress)
{
SnapStrength = HandGrab.ComputeHandGrabScore(this, Interactable,
out GrabTypeFlags hoverGrabTypes);
SnapData = _currentSnap;
}
else
{
SnapStrength = 0f;
SnapData = null;
}
if (Interactable != null)
{
ShouldSelect = HandGrab.ComputeShouldSelect(this, Interactable,
out GrabTypeFlags selectingGrabTypes);
}
}