// method: change the direction reference transform to the corresponding hand's transform for the left treader // public static void changeDirectionReferenceTransformToHandForLeft() => left.changeDirectionReferenceTransformToHand();
// method: change the direction reference transform to the corresponding hand's transform for the given treader // public static void changeDirectionReferenceTransformToHandForTreader(Treader treader) => treader.changeDirectionReferenceTransformToHand();