Unity 2D Platfomer Enemy follow player only on x-axis, c#

Question

Hey guys, I am making a battle system for my RPG game, and I've run into a problem. I want it so if the enemy chases the player non-stop only on the x-axis. Then, when the enemy gets to a certain distance from the player, it will start attacking. Here is a script I have:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class FollowPlayer : MonoBehaviour {
 
     private bool checkTrigger;
     public float speed;
     public Transform target;
 
     void Start () {
         target = GameObject.FindGameObjectWithTag("Player").GetComponent<Transform> ();
     }
     
     // Update is called once per frame
     void Update () {
         if (checkTrigger) {
             transform.position = Vector2.MoveTowards (transform.position, target.position, speed * Time.deltaTime);
         }
     }
 
     void OnTriggerEnter2D(Collider2D other) {
         if (other.name == "Player") {
             checkTrigger = true;
         }
     }
 
     void OnTriggerExit2D(Collider2D other){
         if (other.name == "Player") {
             checkTrigger = false;
         }
     }
 }

The problem is this allows the enemy to go any direction, x-axis and y-axis, but I only want the enemy to go on the x-axis only. I would really appreciate help from anyone. :)

Answer 1

Best Answer

Answer by MT369MT · Jul 04, 2018 at 07:30 PM

Hi, You could create a Vector for the destination with the two components x and y like this:

 if (checkTrigger) {
 transform.position = Vector2.MoveTowards (transform.position, new Vector2(target.position.x, transform.position.y), speed * Time.deltaTime);

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Ejpj123 · Jul 04, 2018 at 07:42 PM 0

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Wow, thank you @$$anonymous$$T369$$anonymous$$T That worked! Any ideas on how to add animations for the enemy at the same time? Or is that something seperate?

MT369MT Ejpj123 · Jul 04, 2018 at 07:49 PM 0

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What animations do you have? $$anonymous$$ove/Walk animations that you want to apply when he is moving in a specific direction or do you mean an attack animation?

Ejpj123 MT369MT · Jul 04, 2018 at 07:57 PM 0

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I mean walking animations. I have animations of the Enemy moving left only, so I would have to use "Flip" from the SpriteRenderer at some point.

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MT369MT · Jul 05, 2018 at 07:17 PM 0

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You could check if you are more right or left with the x component. For example:

 if (transform.position.x > target.position.x)
 {
 //target is left
 transform.localScale = new Vector2(-1, 1);
 }
 else if (transform.position.x < target.position.x)
 {
 //target is right
 transform.localScale = new Vector2(1, 1);
 }

Unity 2D Platfomer Enemy follow player only on x-axis, c#

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