LÖVE

Posted: **Fri Jun 03, 2016 11:04 pm**

I want to use math.round in my project, but errors are thrown.
I tested this problem in a new 1 line project with the math module enabled in the config.

Why isn't math.round working for me?

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print(math.round(1.2))

Posted: **Fri Jun 03, 2016 11:11 pm**

Because math.round doesn't exist. It's a convenience function provided in some frameworks (I think it exists in gmod, for example), but it's not part of the Lua standard library and LÖVE devs don't want to interfere with that. You can easily define it as such:

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math.round = function(n) return math.floor(n + 0.5) end

Posted: **Sat Jun 04, 2016 12:27 am**

Did some research with these things, and the following definitions seemed the fastest in Löve;

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-- math.floor rounds to negative infinity
-- math.ceil rounds to positive infinity
math.trunc = function(n) return n >= 0.0 and n-n% 1 or n-n%-1 end -- rounds towards zero from both infinities
math.round = function(n) return n >= 0.0 and n-n%-1 or n-n% 1 end -- rounds away from zero, towards both infinities

Not to mention the fact that these definitions provide all of the "big 4" rounding functions, though none of them handle the .5 thing specially.

Posted: **Sat Jun 04, 2016 1:04 am**

Thanks. Much appreciated

Posted: **Wed Jun 08, 2016 10:47 pm**

Code: Select all

math.floor( val + 0.5 )

Works fine in a lot of cases.

LÖVE

math.round isn't working?

math.round isn't working?

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