Transform.IsChildOf

Description

Is this transform a child of 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.

function OnTriggerEnter (col : Collider) {
    // 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");
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void OnTriggerEnter(Collider col) {
        if (col.transform.IsChildOf(transform))
            return;
        
        print("Do something here");
    }
}