ParticleSystem.MainModule.customSimulationSpace

Description

Simulate particles relative to a custom transform component.

Additional resources: ParticleSystemSimulationSpace.Custom.

using System.Collections;
using UnityEngine;

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public Transform relativeTo;

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

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