Gen_Hack-and-Slash-Roguelite/Client/Assets/Scripts/Prefab/HoverButtonPrefab.cs

using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Prefab
{
    // [RequireComponent(typeof(CircleCollider2D))]
    public class HoverButtonPrefab : MonoBehaviour
    {
        public TMP_Text text;
        public Button button;
        // public CircleCollider2D circleCollider;

        public float startRadius = 250;
        public float endRadius = 100;


        private void Start()
        {
            // circleCollider.radius=startRadius;
        }

        public void OnMouseOver()
        {
            var dir = (Input.mousePosition - transform.position).magnitude;

            var color = button.image.color;
            color.a = Mathf.Min((startRadius - dir) / (startRadius - endRadius), 1);
            button.image.color = color;
        }

        public void OnMouseEnter()
        {
            button.gameObject.SetActive(true);
        }

        public void OnMouseExit()
        {
            button.gameObject.SetActive(false);
        }
    }
}