Acceleration minus acceleration from rotation

2015-02-11 Thread Steven Chalmers, UI Insight, Inc.
I have played with, and understand, accelerationChanged and rotationRateChanged but I have a complex requirement to remove the effect of rotation from acceleration. Imagine a phone lying on its back on the table. 1) I want the acceleration numbers generated from tapping the phone on its side

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread 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 richmondmathew...@gmail.com wrote: What my iPad CANNOT do, is detect if it is moved across a surface, for the very SIMPLE reason that it

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread Mike Bonner
THATS why cats always manage to land on their feet. Good to know. On Wed, Feb 11, 2015 at 11:06 AM, Richmond richmondmathew...@gmail.com wrote: On 11/02/15 20:04, Colin Holgate wrote: Later devices have gyroscopes, that can detect non-rotation movement. That may help solve the original

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread Richmond
On 11/02/15 19:35, Steven Chalmers, UI Insight, Inc. wrote: I have played with, and understand, accelerationChanged and rotationRateChanged but I have a complex requirement to remove the effect of rotation from acceleration. Imagine a phone lying on its back on the table. 1) I want the

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread Richmond
On 11/02/15 20:04, Colin Holgate wrote: 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 richmondmathew...@gmail.com wrote: What my iPad CANNOT do, is detect if it is moved across a

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread Mike Bonner
The accelerometers in the device WILL pick up a linear movement. Tilting it, changes the acceleration in an axis in relation to the direction of gravity. But applying force against the inertia of the accelerometers will definitely be picked up. On Wed, Feb 11, 2015 at 10:59 AM, Richmond

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread Geoff Canyon
On Wed, Feb 11, 2015 at 11:59 AM, Richmond richmondmathew...@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?]. AccelerationChanged

Re: Acceleration minus acceleration from rotation

2015-02-11 Thread Richmond
On 11/02/15 20:08, Mike Bonner wrote: THATS why cats always manage to land on their feet. Good to know. I am tempted to access the Git-hub code repository and attempt a Livecode build for the Cat platform . . . the main thing that is stopping me is that certain programming terms are not