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[fixed] mathx.wrap over-complicated impl, mathx.round (thanks @MikuAuahDark/@sharpobject)

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This commit is contained in:
Max Cahill 2020-07-09 15:32:42 +10:00
parent 7d3b568ac5
commit 5230e8f9d6
1 changed files with 5 additions and 7 deletions
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12
mathx.lua
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@ -8,12 +8,7 @@ local mathx = setmetatable({}, {
--wrap v around range [lo, hi) --wrap v around range [lo, hi)
function mathx.wrap(v, lo, hi) function mathx.wrap(v, lo, hi)
local range = hi - lo return (v - lo) % (hi - lo) + lo
local relative = v - lo
local relative_wrapped = relative % range
local relative_add = relative_wrapped + range
local final_wrap = relative_add % range
return lo + final_wrap
end end
--wrap i around the indices of t --wrap i around the indices of t
@ -31,8 +26,11 @@ function mathx.clamp01(v)
return mathx.clamp(v, 0, 1) return mathx.clamp(v, 0, 1)
end end
--round v to nearest whole --round v to nearest whole, away from zero
function mathx.round(v) function mathx.round(v)
if v < 0 then
return math.ceil(v - 0.5)
end
return math.floor(v + 0.5) return math.floor(v + 0.5)
end end