How to make Particle System on when I throw grenades on ground after 5 second.

Tell me how to activate explosion particle on and sound for 5 second when I throw grenade. Please tell me.
Thanks in Advance !

Just add start delay (in second) in the particle system main module. As for the sound, you need to add another game object with AudioSource component, and then write a script to delay the activation of the gameobject or its audio component in coroutine.

check collision if it’s ground then start coroutine or use time like this

if (// grounded)
Lifetime -=Time.deltaTime

put lifetime =5

From what i understand, you have a grenade that has a particle system attached to it. You want the particle system and the audio to start after 5 seconds from when it hits the ground. A good way to do this is through collision detection with the ground. Once it collided, you will start a Coroutine() and tell it to play the audio and the particle system after 5 seconds. This is what you will need:

  • A grenade with a Rigidbody to give it the natural physics. And a collider to detect collision with the ground. (The ground must have a collider as well).
  • A particle system that is a child of the genade (the parent). And an Audio Source element and add the explosion sound to it.
  • Create a tag for the ground with the name “Ground”
  • Create a script and attach it to the grenade.

This is how the script should look like:

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

public class GrenadeScript : MonoBehaviour {

    public ParticleSystem explosionParticle;

    private AudioSource explosionSound;
    private int explosionEnabler = 0;

    private void Start()
        explosionSound = gameObject.GetComponent<AudioSource>();

    private void OnCollisionEnter(Collision coll)
        if (explosionEnabler == 0)
            if (coll.gameObject.CompareTag("Ground"))
                explosionEnabler = 1;

    IEnumerator Explosion()
        yield return new WaitForSeconds(5f);


This should do the trick.

I attached an image so you can follow the setup exactly

All the best in making you game :slight_smile: