Wow, this is more than what I expected from the forum. Great !

Darrel: You are right, first problem is solved with the negative sine things,

now the question is" how to adjust the " hardness " of the curve


Alain: The purpose of this curve is to compensate the output of a joystick to suit players response in a game.

Some player like "agrresive" joystick response while some other like "standard,linear" response.

Jon