How to make a grenade explosion with damage that will not go through walls (colliders)?

Question

Unity

Hello, I'm trying to implement a grenade, but I ran into such a problem: during the explosion, the player takes damage even if he is behind the wall.
Here are my 2 grenade implementations:

one

using System.Collections.Generic;
using UnityEngine;

public class GranadeBulletScript : MonoBehaviour {

    private float timeDetected = 5f;
    private List<GameObject> playerInTrigger = new List<GameObject>();

  // Use this for initialization
  void Start () {
        gameObject.GetComponent<Rigidbody>().velocity = gameObject.transform.forward * 20;
    }
  
  // Update is called once per frame
  void Update () {
        timeDetected -= Time.deltaTime;
        if(timeDetected <= 0)
        {
            foreach (GameObject hit in playerInTrigger)
                Damage(hit);
            Destroy(gameObject);
        }
  }

    private void Damage(GameObject hit)
    {
        var health = hit.GetComponent<Player>();
        if (health != null)
        {
            health.TakeDamage(100f);
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Player")
            playerInTrigger.Add(other.gameObject);
    }

    private void OnTriggerExit(Collider other)
    {
        if (other.gameObject.tag == "Player")
            playerInTrigger.Remove(other.gameObject);
    }
}

and here is the second option

using UnityEngine;

public class GranadeScript : MonoBehaviour
{
    [SerializeField] private float damage;
    [SerializeField] private float radius;
    [SerializeField] private float timeOfExplode;

    private void Damage(GameObject hit)
    {
        var health = hit.GetComponent<Player>();
        if (health != null)
        {
            health.TakeDamage(damage);
        }
    }

    private void Update()
    {
        timeOfExplode -= Time.deltaTime;

        if (timeOfExplode <= 0)
        {
            Collider[] colls = Physics.OverlapSphere(transform.position, radius);

            foreach (Collider coll in colls)
            {
                if (coll.gameObject.tag == "Player")
                {
                    Debug.Log("Boom");
                    Damage(coll.gameObject);
                }
            }
        }
    }

    private void OnDrawGizmos()
    {
        Gizmos.DrawWireSphere(transform.position, radius);
    }
}

It is necessary to do something so that the explosion does not pass through the walls, please tell me how to implement this?

Answer 1

Make a raycast from the grenade to the character and find out if there is an obstacle on the way. Or, for complete realism, you launch a bunch of fragments and they will reach the character or not.