計算反射角和鈍角

Question

給定兩條共同原點，其旋轉角度以度爲單位，Lua計算所涉及的反射角和鈍角的最佳方法是什麼？

Answer 1

假設你想要的補充鈍角的反射角度，不要擔心會在90分或180度值鈍角值：

 
function obtuse_reflex(a, b) 
    local diff = (a - b) % 180 
    if diff < 90 then diff = 180 - diff end 
    return diff, 360 - diff 
end