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Very cool! I've also been playing around with this (as a side-project), but using a wireless gamepad instead. It actually works pretty good, and I'm looking forward to playing it on live servers one of these days.
I have a wireless gamepad but the game doesn't take the input (naturally) so i can't map stuff, how do you do it? For android i mean
One of the things I'm working on in my spare time is adding natural, native support for gamepads in gw2, but it's not released yet, so the way I do it won't work for you... but hopefully it will one day soonish :-)