ZeroVR/ZeroPacientVR/Assets/Scripts/BulletProxy.cs

using Unity.Mathematics;
using UnityEngine;

namespace UnityTemplateProjects
{
    public class BulletProxy : MonoBehaviour
    {
        [SerializeField] private TrailRenderer tr;
        [SerializeField] private ParticleSystem particles;
        private float oldTime;
        private ParticleSystem instPart;

        private void Awake()
        {
            oldTime = tr.time;
            if(particles)
            {
                particles.gameObject.SetActive(false);
            }
        }

        private void OnDisable()
        {
            tr.time = 0;
            if(instPart)
            {
                var main = instPart.main;
                main.loop = false;
                //main.duration = 0.2f;
                Destroy(instPart.gameObject, 2f);
                instPart = null;
            }
        }

        private void OnEnable()
        {
            tr.time = oldTime;
            if(instPart)
            {
                Destroy(instPart.gameObject);
            }
            if(particles)
            {
                instPart = Instantiate(particles, transform.position, quaternion.identity);
                instPart.gameObject.SetActive(true);
            }
        }

        private void Update()
        {
            if(instPart)
            {
                instPart.transform.position = transform.position;
            }
        }
    }
}