Version: 2017.2
public ParticleSystemSimulationSpace simulationSpace ;

Description

This selects the space in which to simulate particles. It can be either world or local space.

Toggle between local and world space simulation using the following example:

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { private ParticleSystem ps; public bool useLocal = true;

void Start() { ps = GetComponent<ParticleSystem>(); var main = ps.main; useLocal = main.simulationSpace == ParticleSystemSimulationSpace.Local; }

void Update() { var main = ps.main; main.simulationSpace = useLocal ? ParticleSystemSimulationSpace.Local : ParticleSystemSimulationSpace.World; }

void OnGUI() { useLocal = GUI.Toggle(new Rect(10, 60, 200, 30), useLocal, "Use Local Simulation Space"); } }

Simulate particles relative to an independent game object using the following example:

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

public class ParticleSystemScript : MonoBehaviour { private ParticleSystem ps; public Transform relativeTo;

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

var main = ps.main; main.simulationSpace = ParticleSystemSimulationSpace.Custom; main.customSimulationSpace = relativeTo; }

void Update() { } }