Get the current orientation of the touch area and tool area in radians clockwise from
vertical for the given pointer index.
An angle of 0 degrees indicates that the major axis of contact is oriented
upwards, is perfectly circular or is of unknown orientation. A positive angle
indicates that the major axis of contact is oriented to the right. A negative angle
indicates that the major axis of contact is oriented to the left.
The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
(finger pointing fully right).
Get the current orientation of the touch area and tool area in radians clockwise from vertical for the given pointer index. An angle of 0 degrees indicates that the major axis of contact is oriented upwards, is perfectly circular or is of unknown orientation. A positive angle indicates that the major axis of contact is oriented to the right. A negative angle indicates that the major axis of contact is oriented to the left. The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians (finger pointing fully right).