Unity2D开发实现残影冲刺

1.创建残像预制件-添加Sprite Renderer组件，并为其添加单独新建的C#脚本
PlayerAfterImageSprite.cs
```
public class PlayerAfterImageSprite:MonoBehaviour

{
  [SerializeField]
  private float activeTime=0.1f;
  private float timeActivated;
  private float alpha;
  [SerializeField]
  private float alphaSet=0.8f;
  private float alphaMultiplier=0.85f;

  private Transform player;

  private SpriteRenderer SR;
  
  private SpriteRenderer playerSr;

  private Color color;

  private void OnEnable()

 {
  SR=Getcomponent<SpriteRenderer>();
  player=GameObject.FindGameObjectWith("Player").transform;
  playerSR=player.GetComponent<SpriteRenderer>();
  alpha =alphaSet;
  SR.sprite=playerSR.sprite;
  transform.position=player.position;
  transform.rotation=p