private void MoveKnobToHand(Knob knob)
{
if (knob != null)
{
float tolerance = 0.01f;
Vector3 handPosition = grab.hand.Centre();
Debug.Log("hand z: " + handPosition.z);
Debug.Log("knob z: " + knob.Z());
if (handPosition.z < (knob.Z() - tolerance))
{
knobs.MoveCloser();
}
else if (handPosition.z > (knob.Z() + tolerance))
{
knobs.MoveAway();
}
}
}