ParticleSystem.MainModule.customSimulationSpace

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public Transform customSimulationSpace;

Description

Simulate particles relative to a custom transform component.

See Also: ParticleSystemSimulationSpace.Custom.

using System.Collections;
using UnityEngine;

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;
    }
}