Driftology/Assets/Scripts/SkidMarks.cs

using UnityEngine;

public class SkidMarks : MonoBehaviour
{
    [SerializeField] private GameObject _driftEffect;
    private VehicleController _attachedController = null;
    private ParticleSystem _smokeEffect = null;
    private TrailRenderer _tireTrail = null;

    private void Awake()
    {
        _attachedController = GetComponentInParent<VehicleController>();
        _smokeEffect = GetComponent<ParticleSystem>();
        _tireTrail = GetComponent<TrailRenderer>();
        _tireTrail.emitting = false;
        _tireTrail.startWidth = _attachedController.SkidWidth;
        _tireTrail.time = _attachedController.SkidDuration;
    }

    private void OnEnable()
    {
        _tireTrail.enabled = true;
    }

    private void OnDisable()
    {
        _tireTrail.enabled = false;
    }

    private void FixedUpdate()
    {
        if (_attachedController.Running)
        {
            if (_attachedController.Grounded)
            {
                //_tireTrail.emitting = Mathf.Abs(_attachedController.LocalVelocity.x) > 10f;
                _tireTrail.emitting = Mathf.Abs(_attachedController.LocalVelocity.x) > 25f && _attachedController.CurrentSpeed > 70f;
                //_tireTrail.emitting =
                //Mathf.Abs(_attachedController.LocalVelocity.x) > 5f &&
                //_attachedController.CurrentSpeed > 20f;
            }
            else
            {
                _tireTrail.emitting = false;
            }

            if (_tireTrail.emitting)
            {
                if (_driftEffect != null)
                    _driftEffect.SetActive(true);
                if (_smokeEffect != null)
                    _smokeEffect.Play();
            }
            else
            {
                if (_driftEffect != null)
                    _driftEffect.SetActive(false);
                if (_smokeEffect != null)
                    _smokeEffect.Stop();
            }
        }
        else
        {
            _tireTrail.emitting = false;
            if (_smokeEffect != null)
                _smokeEffect.Stop();
            if (_driftEffect != null)
                _driftEffect.SetActive(false);
        }
    }
}