void Awake()
 {
     player       = GameObject.FindGameObjectWithTag("Player").transform;
     playerHealth = player.GetComponent <PlayerHealth> ();
     kingHealth   = GetComponent <KingHealth> ();
     nav          = GetComponent <NavMeshAgent> ();
 }
    void Shoot()
    {
        timer = 0f;

        gunAudio.Play();

        gunLight.enabled = true;

        gunParticles.Stop();
        gunParticles.Play();

        gunLine.enabled = true;
        gunLine.SetPosition(0, transform.position);

        shootRay.origin    = transform.position;
        shootRay.direction = transform.forward;

        if (Physics.Raycast(shootRay, out shootHit, range, shootableMask))
        {
            EnemyHealth enemyHealth = shootHit.collider.GetComponent <EnemyHealth> ();
            if (enemyHealth != null)
            {
                enemyHealth.TakeDamage(damagePerShot, shootHit.point);
            }
            KingHealth kingHealth = shootHit.collider.GetComponent <KingHealth> ();
            if (kingHealth != null)
            {
                kingHealth.TakeDamage(damagePerShot, shootHit.point);
            }


            gunLine.SetPosition(1, shootHit.point);
        }
        else
        {
            gunLine.SetPosition(1, shootRay.origin + shootRay.direction * range);
        }
    }