still haven't been able to figure out how to know when it is spinning backwards though! as right now I am just measuring the outwards force.

haha

forgot to credit you too for the awesome accelerometer goodness! btw can you think of a way to figure out which way the device is spinning - all the getForce / getOrientation functions don't seem to produce values that can distinguish clockwise from anti-clockwise.

no problem, this is so cool, looks great fun :P

detecting clockwise v anti-clockwise could be quite tricky without any other help, cos the point about which the device is spinning is probably gonna vary randomly. What might work, is if you pivot one end of the device before spinning (i.e. hold it down with your finger) and then swing the other end around. Then you can check the x component of acceleration to determine the direction. I.e. if you're pivoting the top of the iphone, and swing the tail round (i.e. if accel.y < 0), then you can check x component: if (accel.x > 0) its clockwise; else ccw;
if you're pivoting the bottom of the iphone and swing the top around (i.e. if accel.y>0) then you can check if (accel.x < 0) its ccw; else cw.
once the iphone has started spinning you can save the direction until accel.y drops below a threshold (i.e. stops or changes direction) so it's safe to let go of the pivot (I think).
The pivot method might work quite well when scratching.

I have no idea if this will work btw, just thought of it and haven't tried it. If it does work, and you can scratch, I want a copy! :P

Good to hear that you think its tricky - I felt like I might be missing something obvious.

I will try your method out though.

The other option is just to fake it and make a forward / reverse double tap option.

yea it is quite tricky I think... though you could nail it on a non horizontal surface and look at fluctuations in accel.z :P

yea try the end pivot thing. i wrote that just before I went to bed, and ended up having dr-dr-waka-waka-reams about it! \m/

I agree with Memo. Just had a look on a graph of the acc.meter when turning it around, it seems like you get a spike that goes either positive or negative when turning it either forward or backwards on the x axis.

you could use the touch screen as added input?
if you slow it down, your fingers move a little across the screen, an by that way, the phone/itouch can determinewhat way the thing is spinning.
but it would require a little more practice to operate the app, because you have to think of the touchscreen input, that it doesnt do anything you dont want it to do

its the mobile finder from cydia (jailbroken). lets you move files around, rename etc.

though the above app is all legit :)

Hey Zach,
no not yet - I think I will need to though to do proper scratching. I tried doing it just with pitch but it didn't sound right. Don't know how I posted to the wrong thread btw - I was wondering where my post went.