Ok, so the idea is to transform the XY values from a PS3 analogue stick into linear values like that of a [knob] or [slider].

For example if you push the analogue stick straight forward it would be the same as turing a knob to its 12 o'clock position, keeping the stick agains the edge of its circumference and pushing it to the left 90 degrees would turn the knob to its 9 o'clock position.

The values range from:
left - right: 0 - 255
top - bottom: 0 - 255

Hope that makes sense.

I am not sure I understand. You want the joystick to only send out a single value rather than 2 values?

like I say I don't really understand but there is a patch by Arif that might help - a number direction monitor and maybe add in a moses or some relational test after. I've used this with joystick controllers to mess around with the numbers coming in.

http://puredata.hurleur.com/sujet-2748-motion-detection-direction

[cartopol] is your friend here. The attached should get you going.

http://www.pdpatchrepo.info/hurleur/joystickangle.mmb.pd

@Maelstorm said:

[cartopol] is your friend here. The attached should get you going.

Excellent, that looks like it should do the trick, if i can get it work it out that is, I'm not a maths guy.

Thanks very much.