mmorpg2d/Assets/FlashWhenEnable.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;
using UnityEngine.UI;

public class FlashWhenEnable : MonoBehaviour
{
    [SerializeField] private SpriteRenderer _image;
    [Header("Flash Settings")]
    [SerializeField] private float _fadeDuration = 1.5f;
    [SerializeField] private float _minAlpha = 0.4f;
  
    private Sequence _flashSequence;

    private void Awake()
    {
        _image = GetComponent<SpriteRenderer>();
    }

    void OnEnable()
    {
        StartFlashing();

    }
    void OnDisable()
    {
        StopFlashing();
    }

    private void StartFlashing()
    {
        // Kill any existing animation
        if (_flashSequence != null && _flashSequence.IsActive())
            _flashSequence.Kill();

        // Reset to original color
        Color originalColor = _image.color;
        originalColor.a = 1f;
        _image.color = originalColor;

        // Create subtle pulse animation
        _flashSequence = DOTween.Sequence()
            .Append(_image.DOFade(_minAlpha, _fadeDuration))
            .Append(_image.DOFade(1f, _fadeDuration))
            .Append(_image.transform.DOScale(0.385f, 0.34f))
            .SetLoops(-1, LoopType.Yoyo)
            .SetEase(Ease.InOutSine);
    }

    private void StopFlashing()
    {
        _flashSequence?.Kill();
        // Reset to full opacity
        Color c = _image.color;
        c.a = 1f;
        _image.color = c;
       
    }
}