Distance moved by Accelerometer

Question

I want to move objects on iPhone screen (rectangle, circle and so on) by moving iPhone. For example, I move iPhone along X-axis and the object moves along X-axis. The same for Y,Z-axis.

How can I do this? Can I get algorithm for it?

Thank you.

P.S: I looked for a while and seems like it is possible using accelerometer.

Answer 1

You get position by integrating the linear acceleration twice but the error is horrible. It is useless in practice.

Here is an explanation why (Google Tech Talk) at 23:20. I highly recommend this video.

However the gyro mouse might work for your application, see between 37:00-38:25 in the video.

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