forked from Mirrorlandia_minetest/minetest
Optimize vector length calculations (#11549)
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@ -209,14 +209,7 @@ end
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--------------------------------------------------------------------------------
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function math.hypot(x, y)
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local t
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x = math.abs(x)
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y = math.abs(y)
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t = math.min(x, y)
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x = math.max(x, y)
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if x == 0 then return 0 end
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t = t / x
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return x * math.sqrt(1 + t * t)
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return math.sqrt(x * x + y * y)
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end
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--------------------------------------------------------------------------------
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@ -67,7 +67,7 @@ metatable.__eq = vector.equals
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-- unary operations
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function vector.length(v)
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return math.hypot(v.x, math.hypot(v.y, v.z))
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return math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z)
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end
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-- Note: we can not use __len because it is already used for primitive table length
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@ -104,7 +104,7 @@ function vector.distance(a, b)
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local x = a.x - b.x
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local y = a.y - b.y
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local z = a.z - b.z
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return math.hypot(x, math.hypot(y, z))
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return math.sqrt(x * x + y * y + z * z)
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end
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function vector.direction(pos1, pos2)
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