How do you make enemies rotate to your position in 2d

Question

Hi I am trying to make it so enemies move toward the player in 2d. I already made them able to move but I do not know how to make it so they turn around to face me. Heres what I have so far: private GameObject Player; public Transform target; public float speed = 3f;

     void Start() 
     {
         Player = GameObject.Find("Player"); // target
     }
  
      void Update()
      {     
 //move towards player
         if (Vector3.Distance(transform.position, target.position) > 1f) 
         { 
             transform.position = Vector2.MoveTowards(transform.position, Player.transform.position,   speed * Time.deltaTime); 
         }
      }

Answer 1

Best Answer

Answer by sean244 · Jan 20, 2019 at 01:14 AM

alt text

Here’s the script:

 using UnityEngine;
  
 public class Enemy : MonoBehaviour
 {    
 public Transform target;
 public float speed = 3f;
  
 private void Update()
 {
     if (Vector3.Distance(transform.position, target.position) > 1f)
     {
         MoveTowardsTarget();
         RotateTowardsTarget();
     }
 }
  
 private void MoveTowardsTarget()
 {
     transform.position = Vector2.MoveTowards(transform.position, target.position, speed * Time.deltaTime);
 }
  
 private void RotateTowardsTarget()
 {
     var offset = 90f;
     Vector2 direction = target.position - transform.position;
     direction.Normalize();
     float angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;       
     transform.rotation = Quaternion.Euler(Vector3.forward * (angle + offset));
 }
 }

enemyrotation.gif (315.5 kB)

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danielg8 · Jan 20, 2019 at 01:27 AM 0

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Good point. I dunno why I referenced the player twice. But thanks so much for the answer!

sean244 danielg8 · Jan 20, 2019 at 01:34 AM 1

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Your welcome. Keep in $$anonymous$$d that at the very beginning, the enemy will instantly snap to the right rotation. If you don't like this, you can have it more smoothly rotate towards it instead. Just create a float called 'rotationSpeed' and replace

 transform.rotation = Quaternion.Euler(Vector3.forward * (angle + offset));

with these two lines

 Quaternion rotation = Quaternion.AngleAxis(angle + offset, Vector3.forward);
 transform.rotation = Quaternion.Slerp(transform.rotation, rotation, rotationSpeed * Time.deltaTime);

KaNgUrUh · Nov 19, 2020 at 12:48 PM 1

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I want you to know sir, that you, yes you, are a god among men. I spent HOURS trying to make a fireball rotate in the direction of its path. You saved my night.

sean244 KaNgUrUh · Nov 19, 2020 at 06:32 PM 0

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You're welcome :)

mukasv sean244 · Feb 03 at 12:25 PM 0

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Why did you need to normalize? And this variable angle, what calculation does it return?

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Answer 2

Answer by tormentoarmagedoom · Jan 20, 2019 at 12:46 AM

Good day.

Did you tried transform.LookAt() ?

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danielg8 · Jan 20, 2019 at 01:25 AM 0

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Yeah so I just tried adding transform.LookAt(target) to my script and the weirdest thing happens: all of my enemies disappear and fall off the map. $$anonymous$$ust be a glitch with unity

Toscan0 danielg8 · Apr 13, 2020 at 12:29 AM 0

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Did u set the correct target? I dont belive its a glitch.

Since is a 2d game, i guess that u are using 2d sprites, if u rotate a sprite 90 degres he desapers, because we dosen't pcupe space in the z axis, like a plan

How do you make enemies rotate to your position in 2d

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