On Mon, 22 Dec 2008 12:31:44 +0100, Pierre-Alain Dorange wrote:
>> > I don't find any sign(x) function in the math library (return the
>> > sign of the value).
>> > I've read that math module is a wrapper to C math lib and that C math
>> > lib has not sign(), so...
[snip]
> As my need is for a game and that i do not have IEEE real concern, i
> would simply using my simple function (but not as accurate) :
>
> def sign(x):
> if x==0.0:
> return 0.0
> elif x>0.0:
> return 1.0
> else:
> return -1.0
I found this snippet to be quite succinct (even though being smart
*might* be wrong in programming)::
sign = lambda x:+(x > 0) or -(x < 0)
HTH,
--
Robert "Stargaming" Lehmann
--
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