MacBook Motion Sensor

The motion sensor in Apple's MacBook Pro is not just for protecting your hard drive.

This uses AMSTracker, a command line tool that regularly reports on the motion sensors status.

Perhaps the mechanism could be used as a 3D Model Navigation device ?

Axes Motion

There is a little more technical data provided by Amit Singh, the author of AMSTracker, read the Article The Sudden Motion Sensor at

https://www.osxbook.com/book/bonus/chapter10/ams/.