Enemy stops patrolling when player comes close

[XBigGuyX]

Hey guys!
I am pretty new to Unity and C# so I wanted to ask how it is possible to make my enemy stop moving when the player comes close.
My enemy moves this way:

if (moveRight)
		{	
			transform.Translate(2 * Time.deltaTime * speed, 0, 0);
			transform.localScale = new Vector2(1, 1);
		}
		else
		{
			transform.Translate(-2 * Time.deltaTime * speed, 0, 0);
			transform.localScale = new Vector2(-1, 1);
		}

if (trig.gameObject.CompareTag("stopper"))
		{

			if (moveRight)
			{
				moveRight = false;
			}
			else
			{
				moveRight = true;

The trigger is there because I created two GameObjects my enemy collides to so that he turns. now I want to make him stop when the player comes close.
I found a solution like this:

Vector2.Distance(transform.position, player.position

but it didn’t to the job.

I hope you can help me out

Kind regards

[unity_MXGApNcapNfNLg]

@XBigGuyX Vector2.Distance gives distance between two point so you need to do something like this:

if(Vector2.Distance(transform.position, player.position) < 1){ 

//Stop Moving
}

[Jean-Michel_Houbre]

The correct method is to set up waypoints. So the enemy is not limited to the X axis. For a simple patrol, 2 points are enough.

A waypoint is an empty object on the map. One of the methods (there are others, but I take the simplest) is to place the WPs by hand in the Inspector, so the script knows where they are.

The code is incomplete: it does not deal with the attack. The enemy simply goes to the player’s position.

using UnityEngine;

public class Enemy : MonoBehaviour
{
	[SerializeField] private Transform[] waypoints;
	[SerializeField] private float speed = 5f;
	[SerializeField] private Transform player = null;

	private enum State { Patrol, Attack };
	private State state;
	private int currentWayPointIndex = 0;

	private void Start ()
	{
		state = State.Patrol;
	}

	private void Update ()
	{
		switch (state)
		{
			case State.Patrol:
				OnPatrol ();
				break;
			case State.Attack:
				Attack ();
				break;
			default:
				break;
		}
	}

	private bool IsPlayerClose ()
	{
		// Compute distance has a heavy cost : a square root is computed (at each frame!). So I use squarred distance :
		// I don't need the exact distance, just whether or not it's smaller than a certain value.
		float squarredDistance = (player.position - transform.position).sqrMagnitude;
		// As the value I chose 3 meters, so I compare against 3 ^ 2. It is to be adjusted according to the scale
		// of your game and the type of enemy (melee, ranged, ...)
		return (squarredDistance <= 9f);
	}

	private void OnPatrol ()
	{
		// Move to the next Waypoint.
		transform.position = Vector3.MoveTowards (transform.position, waypoints[currentWayPointIndex].position, speed * Time.deltaTime);
		// Is the player close?
		if (IsPlayerClose ())
		{
			// Attack!!!
			state = State.Attack;
		}
		// Arrived?
		float squarredDistance = (waypoints[currentWayPointIndex].position - transform.position).sqrMagnitude;
		if (squarredDistance <= 1f)
		{
			NextWaypoint ();
		}
	}

	private void Attack ()
	{
		// Move to the player.
		transform.position = Vector3.MoveTowards (transform.position, player.position, speed * Time.deltaTime);
		// Like above, check the distance and make the job.
		// Your code.
	}

	private void NextWaypoint ()
	{
		currentWayPointIndex++;
		if (currentWayPointIndex >= waypoints.Length)
		{
			currentWayPointIndex = 0;
		}
	}
}