Mathf.DeltaAngle

public static float DeltaAngle (float current, float target);

Description

计算两个给定角度（以度为单位给定）之间的最短差异。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Example() {
        Debug.Log(Mathf.DeltaAngle(1080, 90));
    }
}