How can I activate my particules system when it touch an other box collider

Questions & Answers
1

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

public class BulletController : MonoBehaviour {

public float speed;

public float lifeTime;

public int damageDoing;

// Use this for initialization
void Start () {
}

// Update is called once per frame
void Update () {
	transform.Translate (Vector3.forward * speed * Time.deltaTime);

	lifeTime -= Time.deltaTime;
	if (lifeTime <= 0) {
		Destroy (gameObject);
	}
}

void OnCollisionEnter (Collision other) {
	if (other.gameObject.tag == "Enemies") {
		other.gameObject.GetComponent<EnemiesHealtManager> ().HurtEnemies (damageDoing);

		Destroy (gameObject);
	}
}

}

2

Add this variable at the top:

public GameObject myParticles;

Put this ahead of the Destroy() in OnCollisionEnter

particles = Instantiate (myParticles, transform.location, transform.rotation);

Then drag a prefab of your particle system into the script.