[chuck-users] a example of thinking on interface mapping

[mike clemow]

Just as far as capturing the gesture of a shake is concerned, Kassen,
a 3-axis accelerometer might serve you well also.  Is that what
detects tilt in your joypad?  i seem to recall that the accelerometers
in those joypads aren't the greatest.  if shaking is important, you
might try a better accelerometer.

Also, you're right to try them out on your friends (or anyone on the
street for that matter).  Especially where interfaces are concerned,
people coming from a completely different place will tell you more
about your interface object just by using it that you could ever tell
yourself by testing it yourself.

Do you have any video of this yet?  I'd love to see it in action.

-mike

On Sun, Jun 1, 2008 at 4:43 AM, Kassen <signal.automatique at gmail.com> wrote:
> Dear fellow ChucKists,
>
> This weekend I was experimenting some more with my tilt-sensing joypad,
> adding a -so far crude- granualar way of playing back samples. When I handed
> it to some friends to try it turned out people subconciously expected
> something interesting to happen with vigorous shaking.
>
> This sounded like a interesting idea so I made crude and so far badly
> calibrated implementation. What I'm doing is checking the square of the
> change in bot axis since the last time I polled them and adding both of
> those to a "shake" variable from which I'm also subtracting a value
> periodically (at least as long as it's above 0). The resulting parameter
> seems to do a decent job of detecting whether the joypad is currently being
> shaken and if so how hard. As hard shaking tends to build up the parameter I
> have to let it return to 0 faster if it's higher. The result is -so far-
> being used to scale randomisation in the grain playback rate.
>
> This will need tuning (as well as a cleanup...) and I wonder if left-right
> shaking may need to be diffent from forward-backwards shaking and how
> important the period of "re-stabilising" of the whole thing is.
>
> So; this is still in a early stage, I only started at it last afternoon but
> it might be the sort of practical example that works for some people as a
> illustration of how I try to deal with this sort of subject. BTW, I set this
> sort of thing loose on my friends because I find observing how they interact
> with it leads to different insights then I'd get on my own, insights that
> often make interfaces perform bettter for myself as well.
>
> Hope that was of any use/interest.
> Yours,
> Kas.
>
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