Transform.IsChildOf

Description

Является ли данный transform потомком указанного родителя parent?

Returns a boolean value that indicates whether the transform is a child of a given transform. true if this transform is a child, deep child (child of a child) or identical to this transform, otherwise false.

using UnityEngine;

public class Example : MonoBehaviour
{
    void OnTriggerEnter(Collider col)
    {
        // Ignore trigger events if between this collider and colliders in children
        // Eg. when you have a complex character with multiple triggers colliders.
        if (col.transform.IsChildOf(transform))
        {
            return;
        }

        print("Do something here");
    }
}