ParticleSystem.randomSeed doesn't work?

[benhumphreys]

I’m trying to set the seed of a particle system so every time it’s run, the particles move in the same pattern.

I’ve attached what I’m using below. What am I doing wrong?

using UnityEngine;
using System.Collections;

public class ParticleRandomTester : MonoBehaviour {

	uint m_seed = 42;

	ParticleSystem m_ps;

	[SerializeField]
	bool m_restart;

	void Awake()
	{
		m_ps = gameObject.GetComponent<ParticleSystem>();
	}

	void Update()
	{
		if (m_restart)
		{
			m_restart = false;
			Restart();
		}
	}

	void Restart()
	{
		m_ps.Clear();
		m_ps.Stop();
		m_ps.randomSeed = m_seed;
		Debug.Log("Setting seed: " + m_seed);
		m_ps.time = 0;
		m_ps.Play();
	}
}

[benhumphreys]

Nevermind I found the answer. You have to use Simulate to actually reset the ParticleSystem and get it to use the new randomSeed value. Stop and Clear don’t help.

ps.randomSeed = 42;
ps.Clear();
ps.Stop();
ps.randomSeed = 42;
ps.Play(); // Nope


// Yup
ps.Simulate(0, true, true);