gistfile1.txt

public class EnemyAI : MonoBehaviour {
	private NavMeshAgent agent;
	[SerializeField]
	public float healthPoint = 50;
	private Animator enemyAnimation;
	private GameObject player;
	private PlayerAttack playerEnemyList;
	private bool alive = true;
	private bool startFade = false;
	//fading enemy color when die
	private SkinnedMeshRenderer rend;
	private Color enemyColor;
	private Vector3 ranPos;
	float pauseInterval = 0;
	float pauseTime = 0;
	
	// Use this for initialization
	void Start () {
		rend = GetComponentInChildren<SkinnedMeshRenderer> ();
		enemyColor = rend.material.color;
		agent = GetComponent<NavMeshAgent> ();
		enemyAnimation = GetComponent<Animator> ();
		player = GameObject.FindGameObjectWithTag ("Player");
		playerEnemyList = player.GetComponent<PlayerAttack> ();
		CalculateRandomPos ();
	}
	
	// Update is called once per frame
	void Update () {
		if (player != null && alive) {
			//check if player's nearby
			if (Vector3.Distance (transform.position, player.transform.position) <= 3) {
				//move toward player
				agent.SetDestination (player.transform.position);
				//pas the movement velocity to animator
				enemyAnimation.SetFloat ("runningSpeed", agent.velocity.magnitude);
			} else {
				//if reached the nearby random position
				if (Vector3.Distance (transform.position, ranPos) < 3) {
					//recalculate new ranPos
					CalculateRandomPos ();

					//calculate the time to start movin again
					pauseInterval = Random.Range (2, 10);
					pauseTime = pauseInterval;
				} else {
					//already passed the pausing interval
					if (pauseTime <= 0) {
						//move to random nearby location
						agent.SetDestination (ranPos);

						//just in case if the AI stuck, recalculate random point
						if (agent.velocity == Vector3.zero) {
							CalculateRandomPos ();
						}
					}
				}
				if (pauseTime >= 0) {
					pauseTime -= Time.deltaTime;
				}
			}
		} else if (!alive && startFade) {
			enemyColor = Color.Lerp (enemyColor, new Color (1, 1, 1, 0), 0.1f);
			rend.material.color = enemyColor;
		}
	}

	public void GetDamage (float attackDamage)
	{
		healthPoint -= attackDamage;
		if (healthPoint <= 0) {
			playerEnemyList.RemoveEnemy (gameObject);
			enemyAnimation.SetBool ("die", true);
			alive = false;
			StartCoroutine (Die ());
			StartCoroutine (FadeColor ());
		}
	}

	IEnumerator FadeColor ()
	{
		yield return new WaitForSeconds (1.5f);
		rend.material.SetFloat ("_Mode", 2.0f);
		rend.material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
		rend.material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
		rend.material.SetInt("_ZWrite", 0);
		rend.material.EnableKeyword ("_ALPHABLEND_ON");
		startFade = true;
	}

	IEnumerator Die()
	{
		yield return new WaitForSeconds (5);
		Destroy (gameObject);
	}

	void CalculateRandomPos ()
	{
		NavMeshHit hit;
		NavMesh.SamplePosition (transform.position + Random.insideUnitSphere * Random.Range (3, 10),out hit, 10, NavMesh.AllAreas);
		ranPos = hit.position;
	}
}