//--------------------------------------------------------
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// [Author]: 第二世界
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// [ Date ]: Friday, September 21, 2018
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//--------------------------------------------------------
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using UnityEngine;
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using System.Collections;
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using UnityEngine.UI;
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using DG.Tweening;
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namespace Snxxz.UI {
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public class RotatePointer:MonoBehaviour {
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public bool _isRotate = false;//是否旋转
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public float Speed = 2000;//旋转速度
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public float Angle = 0; // 这个是设置停止的角度
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private float Acceleration = 0;//加速度
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private float _time;
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private bool IsRotateBool = false;//是否进行旋转
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[Header("总旋转时间")]
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public float ContinuousTime = 4;//旋转时间
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[Header("加速减速时间")]
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public float SpeedTime = 1;
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[Header("最小速度")]
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public float MinSpeed= 400;
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[Header("最大速度")]
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public float MaxSpeed = 800;
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private void OnEnable()
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{
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IsRotateBool = false;
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_time = 0;
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Acceleration = (MaxSpeed - MinSpeed) / SpeedTime;
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}
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void Update()
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{
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if (!_isRotate)
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{
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// transform.DORotate(new Vector3(0, 0, 360 + Angle), 0.5f, RotateMode.FastBeyond360);
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return; //不旋转结束
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}
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if (IsRotateBool)
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{
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_time += Time.deltaTime;
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if (_time < SpeedTime)//匀加速
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{
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Speed = MinSpeed + Acceleration * _time;
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if (Speed >= MaxSpeed)
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{
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Speed = MaxSpeed;
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}
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}
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else if (_time > ContinuousTime - SpeedTime)//匀减速
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{
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Speed = MaxSpeed - Acceleration * (_time - (ContinuousTime - SpeedTime));
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if (Speed <= MinSpeed)
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{
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Speed = MinSpeed;
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}
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}
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else//匀速
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{
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Speed = MaxSpeed;
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}
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if (_time < ContinuousTime) // 没结束
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{
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transform.Rotate(Vector3.forward * Speed * Time.deltaTime);
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}
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else
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{
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//结束，使用DoTween旋转到结束角度，耗时1秒
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//这里有个360，使用来防止指针回转的，如果不加这个360，你会看到指针倒退
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transform.DORotate(new Vector3(0, 0, 360 + Angle), 1f, RotateMode.FastBeyond360);
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_isRotate = false; // 设置不旋转
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IsRotateBool = false;
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}
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}
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}
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//外部调用，初始化时间和打开旋转
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public void SetTime()
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{
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_time =0;
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IsRotateBool = true;
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_isRotate = true;
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}
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//外部调用，设置停止角度
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public void SetAngle(float angle)
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{
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Angle = angle;
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}
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}
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}
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