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Add math.sign
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parent
e048fb3b03
commit
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8
math.lua
8
math.lua
@ -8,6 +8,7 @@ local inf = math.huge
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local _ENV = {}
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local _ENV = {}
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setfenv(1, _ENV)
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setfenv(1, _ENV)
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-- TODO might be too invasive
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-- Make random random
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-- Make random random
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math.randomseed(minetest and minetest.get_us_time() or os.time() + os.clock())
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math.randomseed(minetest and minetest.get_us_time() or os.time() + os.clock())
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for _ = 1, 100 do math.random() end
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for _ = 1, 100 do math.random() end
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@ -15,6 +16,13 @@ for _ = 1, 100 do math.random() end
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negative_nan = 0/0
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negative_nan = 0/0
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positive_nan = negative_nan ^ 1
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positive_nan = negative_nan ^ 1
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function sign(number)
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if number ~= number then return number end -- nan
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if number == 0 then return 0 end
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if number < 0 then return -1 end
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if number > 0 then return 1 end
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end
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function round(number, steps)
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function round(number, steps)
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steps = steps or 1
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steps = steps or 1
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return math_floor(number * steps + 0.5) / steps
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return math_floor(number * steps + 0.5) / steps
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