ParticleSystemAutoDestroy

//=====================================================================================
// Author: Stephen Spanner
// Class : ParticleSystemAutoDestroy
// Desc  : A helper class used to automatically remove gameobjects that have particle
//         systems. If no particle system is found, it will simply remove just the
//         script and keep the game-object intact.
//=====================================================================================

using UnityEngine;
using System.Collections;

public class ParticleSystemAutoDestroy : MonoBehaviour
{
    private ParticleSystem mPSys;

    // --------------------------------------------------------------
    // Start()
    // Check to see if a particle system exists, and possibly remove
    // the script if none
    // --------------------------------------------------------------
    public void Start()
    {
        // Grab the particle system of the component, can only be on particle system object
        // and NOT the child.
        mPSys = GetComponent<ParticleSystem>();

        // Check particle system exists
        if( mPSys == null )
        {
            Debug.LogWarning( "[ParticleSystemAutoDestroy] WARNING: No Particle System found on " + gameObject.name );
            Destroy( this );
        }
    }


    // --------------------------------------------------------------
    // Update()
    // Every frame, check to see if Particle System has expired, and
    // then destroy the gameobject if necessary.
    // --------------------------------------------------------------
    public void Update()
    {
        if( mPSys )
        {
            // Check to see if particle system has expired its lifetime, if so, destroy it.
            if( !mPSys.IsAlive() )
            {
                Destroy( gameObject );
            }
        }
        else
        {
            // Particle System was removed somehow, destroy this script.
            Debug.LogWarning( "[ParticleSystemAutoDestroy] WARNING: Particle System was removed from " + gameObject.name );
            Destroy( this );
        }
    }
}