Using this setup to learn the hand rotation values. Using the first detected hand values to find out Pitch, Yaw and Roll of a hand. Remember to place this to the top of the class definition:
using Leap;
then place the rest of the code in the update() function:
Controller controller = new Controller ();
Frame frame = controller.Frame (); // controller is a Controller object
HandList hands = frame.Hands;
Hand firstHand = hands [0];
float pitch = firstHand.Direction.Pitch;
float yaw = firstHand.Direction.Yaw;
float roll = firstHand.PalmNormal.Roll;
Debug.Log ("the pitch is: " + pitch);
Debug.Log ("the yaw is: " + yaw);
Debug.Log ("the roll is: " + yaw);