While a number of commonly needed basic math functions can be used, such as qSin() or qSqrt(), how come Qt is not offering a qSgn() function to determin the sign of a real?
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While a number of commonly needed basic math functions can be used, such as qSin() or qSqrt(), how come Qt is not offering a qSgn() function to determin the sign of a real?
Thinking about how to implement such function; would it make life easier?
It should return something like Qt::Negative or Qt::Positive or Qt::Zero so you can write:
instead of:Code:
Code:
I don't think I would use qSign()... ;)
Actually the (mathematical) definition of Sgn(x) function is 1 if x > 0, 0 if x=0 and -1 if x < 0. And indeed there are some uses for it.
But would the compare with 0 then have to be exact as x == 0.0, or by qFuzzyCompare(x,0.0)?Quote:
Originally Posted by snapshooter
I think I could not live without two distinct functions then.... :rolleyes: