Version: 2017.2
public float startDelayMultiplier ;

Description

Start delay multiplier in seconds.

This method is more efficient than accessing the whole curve, if you only want to change the overall start delay multiplier.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { private ParticleSystem ps; private bool restart; public float hSliderValue = 0.0F;

void Start() { ps = GetComponent<ParticleSystem>(); }

void Update() { if (restart) { ps.Stop(); ps.Clear();

var main = ps.main; main.startDelayMultiplier = hSliderValue;

ps.Play();

restart = false; } }

void OnGUI() { hSliderValue = GUI.HorizontalSlider(new Rect(25, 45, 100, 30), hSliderValue, 0.0F, 5.0F); restart = GUI.Button(new Rect(25, 75, 100, 30), "Restart"); } }