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A form of directional input consisting of a stick that pivots from a fixed position. May or may not have buttons on top or on its base.

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Restricting joystick within a radius of center

I'm not at all familiar with unity or iOS, however this sounds like a maths problem. As your positions go from -1 to +1 all you need to do is see if the distance to the point is greater than 1.0 (i.e …
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