mirror of
https://github.com/tanema/light_world.lua.git
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22 lines
416 B
Lua
22 lines
416 B
Lua
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local vector = {}
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-- vector functions
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function vector.normalize(v)
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local len = math.sqrt(math.pow(v[1], 2) + math.pow(v[2], 2))
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local normalizedv = {v[1] / len, v[2] / len}
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return normalizedv
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end
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function vector.dot(v1, v2)
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return v1[1] * v2[1] + v1[2] * v2[2]
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end
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function vector.lengthSqr(v)
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return v[1] * v[1] + v[2] * v[2]
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end
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function vector.length(v)
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return math.sqrt(lengthSqr(v))
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end
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return vector
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