forked from Mirrorlandia_minetest/minetest
Use vector.dot and vector.cross in vector.angle
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@ -71,11 +71,9 @@ function vector.direction(pos1, pos2)
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end
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function vector.angle(a, b)
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local dotp = a.x * b.x + a.y * b.y + a.z * b.z
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local cpx = a.y * b.z - a.z * b.y
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local cpy = a.z * b.x - a.x * b.z
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local cpz = a.x * b.y - a.y * b.x
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local crossplen = math.sqrt(cpx ^ 2 + cpy ^ 2 + cpz ^ 2)
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local dotp = vector.dot(a, b)
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local cp = vector.cross(a, b)
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local crossplen = vector.length(cp)
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return math.atan2(crossplen, dotp)
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end
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