I've been playing around with the Android Accelerometer of late using the Android SDK and the Adobe AIR for Android SDK on my Motorola Droid. What I've noticed is that the accelerometer works just fine, but I was wondering if it is possible to compensate in some fashion so that I don't have to use the device in a horizontal position. In other words, I want to use the accelerometer to control my visual display, but initialize it(or modify in some way) so that I don't have to hold it perfectly flat (not much fun having to lean over the phone).
Does anyone know how I can hold the device comfortably in my hand, say 45 degrees, and still utilize the accelerometer to provide forward/backwards readings? Is this possible? Any examples of this this available?
You'll need some simple matrix multiplication math for that. "Calibrate" the rotation by taking the current matrix when you start the app and invert it, then multiply all subsequent matrices with it - that will give you the delta to the starting position.