Find and follow nearest object

I'm making a game and in my game there are players and there are enemies and I want the enemies to attack the nearest player in range.

 

Well, what have you tried?

 

I've tried this but it's only focusing on 1 object and it's not good enough.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. public class EnemyAI : MonoBehaviour
5. {
6.     public Transform target;
7.     public float within_range;
8.     public float speed;
9.     public float min_range;
10.     // Update is called once per frame
11.     void Update()
12.     {
13.         transform.LookAt(target);
14.         var distance = Vector3.Distance(target.position, transform.position);
15.         if (distance <= within_range)
16.         {
17.             if (distance >= min_range)
18.             {
19.                 transform.position += transform.forward * speed * Time.deltaTime;
20.             }
21.         }
22.     }
23. }

 

1) You need to get a list of all players.

Search by tag? search by overlap sphere? find by script? have a script that stores all active instances of itself in a easily accessible place like a static collection? There's like a bajillion ways... you just need to get a ref to all of them.

2) Loop over that collection and do a distance comparison, keeping the smallest one.

3) Replace 'target' in your EnemyAI with this player's transform.