Private _dirtyPrivate _fingerPrivate _handPrivate _idPrivate _indexPrivate _localPrivate _localPrivate _localPrivate _positionPrivate _radiusPrivate _rotationPrivate _tipPrivate _worldPrivate _wristIndex of a joint within a finger, starting from 0 (root of a finger) all the way to tip of the finger.
The radius of a joint, which is a distance from joint to the edge of a skin.
True if joint is a tip of a finger.
True if joint is a wrist.
Private _update
Represents the joint of a finger.