[Ozuru]

Originally Posted by Jared

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Originally Posted by Ether

Jared gave you the answer.

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.

Add the two equations:

1 = 2b .....=>..... b = (1/2)

Subtract Equation1 from Equation2:

1 = 2m .....=>..... m=(1/2)

So the conversion is y = (1/2)x + (1/2) = (x+1)/2

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.

Thank you!