public void CheckCollisions(WheelHit coll)
    {
        if (coll.collider.transform.GetComponent <TerrainType>())
        {
            TerrainType terr = coll.collider.transform.GetComponent <TerrainType>();

            if (makeBumpSounds)
            {
                //if (coll.force > (requiredForceForSmallBump + additionalForceRequiredForBigBump)) {
                //    PlayBigBump();
                //    Debug.Log("BUMP");
                //}
                //else {
                //    if (coll.force > requiredForceForSmallBump) {
                //        PlaySmallBump();
                //        Debug.Log("bump");
                //    }
                //}
                float verticalDisplacement = this.transform.position.y - previousVerticalPosition;
                float newVerticalVelocity  = verticalDisplacement / Time.deltaTime;

                if (newVerticalVelocity - previousVerticalVelocity > requiredVelocityChangeForSmallBump + additionalVelocityChangeRequiredForBigBump)
                {
                    PlayBigBump();
                    Debug.Log("BUMP");
                }
                else
                {
                    if (newVerticalVelocity - previousVerticalVelocity > requiredVelocityChangeForSmallBump)
                    {
                        PlaySmallBump();
                        Debug.Log("bump");
                    }
                }

                previousVerticalPosition = this.transform.position.y;
                previousVerticalVelocity = newVerticalVelocity;
            }

            if (currentlyPlayingContinuousSound)
            {
                if (terr.SurfaceType != currentGroundSurface)
                {
                    PlayContinuousSound(terr.SurfaceType);
                }
            }
            else
            {
                if (terr.SurfaceType == currentGroundSurface)
                {
                    PlayContinuousSound(terr.SurfaceType);
                    currentlyPlayingContinuousSound = true;
                }
            }

            currentGroundSurface = terr.SurfaceType;
        }
    }
    public void PlayContinuousSound(TerrainType.TypeOfSurface terrain)
    {
        AudioClip clip = null;

        if (continuousSoundsChannel)
        {
            switch (terrain)
            {
            case TerrainType.TypeOfSurface.Synthetic:
                clip = PickRandomSoundFromList(syntheticSounds);
                break;

            case TerrainType.TypeOfSurface.Grass:
                clip = PickRandomSoundFromList(glassSounds);
                break;

            case TerrainType.TypeOfSurface.Gravel:
                clip = PickRandomSoundFromList(gravelSounds);
                break;

            case TerrainType.TypeOfSurface.Metal:
                clip = PickRandomSoundFromList(metalSounds);
                break;

            case TerrainType.TypeOfSurface.Wood:
                clip = PickRandomSoundFromList(woodSounds);
                break;

            case TerrainType.TypeOfSurface.Glass:
                clip = PickRandomSoundFromList(glassSounds);
                break;

            case TerrainType.TypeOfSurface.Concrete:
                clip = PickRandomSoundFromList(concreteSounds);
                break;

            case TerrainType.TypeOfSurface.Fabric:
                clip = PickRandomSoundFromList(fabricSounds);
                break;
            }
        }

        if (clip)
        {
            continuousSoundsChannel.clip = clip;
            continuousSoundsChannel.Play();
        }
        else
        {
            if (syntheticSounds.Count > 0)
            {
                continuousSoundsChannel.clip = syntheticSounds[Random.Range(0, syntheticSounds.Count)];
                continuousSoundsChannel.Play();
            }
        }
    }
    // Start is called before the first frame update
    void Start()
    {
        col = this.GetComponent <WheelCollider>();
        currentGroundSurface = TerrainType.TypeOfSurface.Synthetic;

        continuousSoundsChannel.loop   = true;
        continuousSoundsChannel.volume = 0;

        previousVerticalPosition = 0;
        previousVerticalVelocity = 0;
    }