Systems and methods according to the present invention describe 3D
pointing devices which enhance usability by transforming sensed motion
data from a first frame of reference (e.g., the body of the 3D pointing
device) into a second frame of reference (e.g., a user's frame of
reference). One exemplary embodiment of the present invention removes
effects associated with a tilt orientation in which the 3D pointing
device is held by a user.