Acceleration minus acceleration from rotation

[Colin Holgate]

Later devices have gyroscopes, that can detect non-rotation movement. That may help solve the original problem.


> On Feb 11, 2015, at 12:59 PM, Richmond <richmondmathewson at gmail.com> wrote:
> 
> >What my iPad CANNOT do, is detect if it is moved across a surface, for the very SIMPLE reason that it doesn't have
> "little wheels" or other motion sensors on its underside [ err . . . backside?].