Short answer: Gravity. The device can't measure actual acceleration. It measures the forces on sensors in 3 axes. One of those axes will feel force from gravity. That's the 1. Jim
-----Original Message----- From: Ben Rubinstein [mailto:benr...@cogapp.com] Sent: Wednesday, January 13, 2016 5:08 AM To: Use LiveCode Subject: mobile acceleration/rotation Hmmmm - I've just tried reading the acceleration and rotation sensors. I admit to finding the whole business confusing, but it seems to me that the data accompanying the accelerationChanged message represents the static orientation of the device. At first I thought that the "rotation" and "acceleration" had been swapped - but then I realised it wasn't "rotation" but "rotation rate". At any rate, the readings I'm getting for acceleration, with my phone lying flat on the desk, have x and y approximately 0, and z at -1. If I bring the phone upright on its short end, y shifts to -1 and z to 0. If instead I bring it upright to lie on its left edge, x goes to -1 and y and z to 0; if I bring it upright on the right edge, x goes to 1, y and z to 0. These seem perfectly reasonable things to me, i.e. they seem to represent the state of rotation around the various axes; but I don't understand how they relate to acceleration. Can someone explain this to me? Many thanks, Ben _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
