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inline int MyMath::floatToIntRounded(hkReal value)
{
const hkReal lowerWhole = floor(value);
const hkReal upperWhole = ceil(value);
if((value - lowerWhole) < (upperWhole - value))
{
return floatToInt(lowerWhole + MY_EPSILON);
}
else
{
return floatToInt(upperWhole + MY_EPSILON);
}
}
(Thanks Dan)
2 comments:
Oh my goodness.
Indeed, "(int)(value + 0.5f)" is not enough, because it doesn't round negative numbers properly. The "floatToIntRounded" function is overcomplicated, but it works (if you drop the MY_EPSILON, I don't know what this one is for) :)
Anyway, the proper way of doing it is "(int) floor(value + 0.5f)" for a round towards zero (the usual way), or this for rounding away from zero: "(value > 0.0) ? floor(value + 0.5) : ceil(value - 0.5)"
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