npc.cs

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

public class npc : MonoBehaviour
{
    private Collider2D z_Collider;
    [SerializeField]
    private ContactFilter2D z_Filter;
    private List<Collider2D> z_CollidedObjects = new List<Collider2D>(1);
    

    protected virtual void Start() 
    {
        z_Collider = GetComponent<Collider2D>();
    }

    protected virtual void Update()
    {
        z_Collider.Overlap(z_Filter, z_CollidedObjects);
        foreach(var o in z_CollidedObjects)
        {
            OnCollided(o.gameObject);
        }
    }

    protected virtual void OnCollided(GameObject collidedObject) 
    {
        Debug.Log("Collided with " + collidedObject.name);
    }
}