研究了下，顏色變化時遵從RGB圓環（就是說顏色條對接一下成環）路徑最小變化原則。舉個例子，加入ABCDE四個顏色點，並且A和E在同一點（轉了一圈）設定從A變化到C的話，有兩種路徑，一種ABC,還一種ADC,究竟選擇哪條路徑 就看這兩條路徑哪個更短些了
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var
colorStart = Color.red;
var
colorEnd = Color.green;
var
duration = 1.0;
var
minimum = 0.0;
var
maximum = 200.0;
function
Update () {
var
lerp = Mathf.PingPong (Time.time, duration) / duration;
renderer.material.color = Color.Lerp (colorStart, colorEnd, lerp);
transform.position.x = Mathf.Lerp(minimum, maximum, lerp);
}
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