# PI / 2f -- Will this have a rounding error?

Could this formula incur a rounding error that causes the +0.5f shift to not work? In other words, could the value ever be, say, -0.00000001?

Is it cleaner to use some sort of mathf absolute value function?

EDIT: Another idea - could one use an unsigned int to get a range of roughly 4 billion and divide the range by that factor at the end to get precise values?

Or is all this just pointless considering you can use a simple if statement to correct the value to 0 if it dips below? What is proper practice vs. practical practice?

Dividing whatever number by a float will always be unprecise, simply because floats are unprecise. You would expect that 2f, is 2.000000000inf. In the compiler this is not possible, so there will be a cutoff value somewhere in the far back decimals. This value makes every math operation with a float unprecise. So you either need to use some absolute value or you need to cut off the unprecise decimals of the float. In many cases this really doesnâ€™t matter though, games is most of the time one of them. Stuff like that mostly becomes relevant in security critical software for Banks etc.

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