IgnoreShooterCollisions.cs

using UnityEngine;
using System.Collections;

[AddComponentMenu("Liberi/Ignore Shooter Collisions")]
public class IgnoreShooterCollisions : MonoBehaviour
{
    public float Duration = 0.1f;
    public bool IgnoreShooterChildren = true;
    
    void Awake ()
    {       
        if (Duration > 0f)
            collider.enabled = false;
    }
    
    void OnSpawn (UJeli details)
    {
        collider.enabled = true;
        
        if (Duration <= 0f)
            return;
    
        if (details.HasChild("Shooter"))
        {
            var shooter = details["Shooter"].GameObjectValue;
            
            if (shooter != null)
            {
                if (IgnoreShooterChildren)
                {
                    foreach (var col in shooter.GetComponentsInChildren<Collider>())
                    {
                        StartCoroutine(IgnoreAsync(col));
                    }
                }
                else
                {
                    StartCoroutine(IgnoreAsync(shooter.collider));
                }
            }
        }
    }
    
    IEnumerator IgnoreAsync(Collider shooterCollider)
    {
        Physics.IgnoreCollision(collider, shooterCollider, true);
    
        if (Duration == Mathf.Infinity)
            yield break;
            
        yield return new WaitForSeconds(Duration);
        
        if (shooterCollider == null)
            yield break;
        
        if (!shooterCollider.enabled || !collider.enabled)
            yield break;
            
        Physics.IgnoreCollision(collider, shooterCollider, false);

        enabled = false;
    }
}