Currently I’m having an issue with the slider of my Logitech joystick. The range is from -1 to 1 and I need to convert it to be from 0 to 1 rather than -1 to 1. How would I go about doing this? I’m using the Logitech Extreme 3D Pro and the axis number is 3. I’m using Java but I figured this is a language-wide issue, hence the post here.

If you are interested, here’s the algebra to solve that kind of problem, for any input and output range, assuming you want a linear conversion from input to output:

Let x be the input and y be the output.

You want a linear conversion, so use the equation for a line:

y = mx + b

When x is -1 you want y to be 0:

0 = m(-1) + b …(Equation1)

When x is 1 you want y to be 1:

1 = m(1) + b …(Equation2)

You have 2 equations with two unknowns, so solve them.

Thanks for that information and thanks for the great explanation, Ether. I hadn’t thought of it that way (as a linear equation pair) but that actually makes sense.

While I understand that the problem is solved, i’m still rather intrigued – why did you feel the need to do this; have default be 0.5, and have the joystick(s) serve as a throttle to that?