实现吃到宝石后宝石上升且渐隐的效果【Unity2D】

实现吃到宝石后宝石上升且渐隐的效果

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Gem : MonoBehaviour
{
    public float speed = 5f;
    private SpriteRenderer sr;

    private void Start()
    {
        sr = GetComponent<SpriteRenderer>();
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.CompareTag("Player"))
        {
            StartCoroutine(FlyAway());
        }
    }

    IEnumerator FlyAway()
    {
        float alpha = 1f;   //透明度

        //宝石向上移动且渐隐
        while (true)
        {
            transform.Translate(Vector3.up * speed * Time.deltaTime);
            alpha -= Time.deltaTime * 1.5f;
            sr.color = new Color(sr.color.r, sr.color.g, sr.color.b, alpha);    //颜色保持不变 只改变透明度

            if (alpha <= 0)
                break;

            yield return null;
        }
        yield return new WaitForSeconds(2f);
        Destroy(gameObject);
    }
}