Question by VeryPoorProvider · Mar 16 at 04:41 PM · c#bug unity5 unity 5.2 transform.lookat

Very strange tank turret behavior in Unity 3D

I have a tank with a separate code for the turret:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class TowerScript : MonoBehaviour
 {
     public GameObject player;
 
     void Start()
     {
         player = GameObject.Find("Tractor");
     }
 
     void Update()
     {
         transform.LookAt(player.transform.position);
     }
 }

This code should rotate the tower after the player. And it basically works. But for some reason, the tower additionally turns up: alt text

My turrets x is should be always -90. But transform.LookAt always change it to 0. I tried a lot of different variants, but they didn't work. How to fix it?

screenshot-140.png (127.2 kB)

Add comment · Show 2

andrew-lukasik · Mar 16 at 06:22 PM 0

This is because Unity considers local-space z+ as "forward" direction.

andrew-lukasik · Mar 16 at 06:42 PM 0

 using UnityEngine;
 public class TowerScript : MonoBehaviour
 {
     [SerializeField] Transform _player;
     [SerializeField] Vector3 _auxRotation = new Vector3( -90 , 0 , 0 );
     void Update ()
     {
         transform.LookAt( _player.position );
         transform.rotation *= Quaternion.Euler(_auxRotation);
     }
 }