accelerometer

I am working with android project.I need FFT algorithm to process the android accelerometer data.Is there FFT library available in android sdk? EricLarch You can use this class, which is fast enough for real time audio analysis public class FFT { int n, m; // Lookup tables. Only need to recompute when size of FFT changes. double[] cos; double[] sin; public FFT(int n) { this.n = n; this.m = (int) (Math.log(n) / Math.log(2)); // Make sure n is a power of 2 if (n != (1 << m)) throw new RuntimeException("FFT length must be power of 2"); // precompute tables cos = new double[n / 2]; sin = new

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. Ali 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

Is it possible to detect change in orientation of the browser on the iPad or Galaxy Tab using javascript? I think it's possible using css media queries. UPDATE: You might want to check out jQuery mobile orientationchange or the plain JS one: window.addEventListener("orientationchange", function() { alert(window.orientation); }, false); MDN: window.addEventListener("orientationchange", function() { alert("the orientation of the device is now " + screen.orientation.angle); }); Older answer http://www.nczonline.net/blog/2010/04/06/ipad-web-development-tips/ Safari on the iPad does support the

I have recently come across a few websites that seems to access the accelerometer or gyroscope on my laptop, detecting changes in orientation or movement. How is this done? Must I subscribe to some kind of event on the window object? On which devices (laptops, mobile phones, tablets) is this known to work? NB : I actually already know (part of) the answer to this question, and I am going to post it right away. The reason that I am posting the question here, is to let everyone else know that accelerometer data is available in Javascript (on certain devices) and to challenge the community to