37 lines
572 B
Lua
37 lines
572 B
Lua
local MATH={}for k,v in next,math do MATH[k]=v end
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local rnd=math.random
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MATH.tau=2*math.pi
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function MATH.sign(a)
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return a>0 and 1 or a<0 and -1 or 0
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end
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function MATH.roll(chance)
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return rnd()<(chance or .5)
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end
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function MATH.coin(a,b)
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if rnd()<.5 then
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return a
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else
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return b
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end
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end
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function MATH.interval(v,low,high)
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if v<=low then
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return low
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elseif v>=high then
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return high
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else
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return v
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end
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end
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function MATH.expApproach(a,b,k)
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return b+(a-b)*2.718281828459045^-k
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end
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return MATH |