Rotating turret to face parent direction of travel

Unity Engine
1

Hi,

I have looked and looked and look for a solution to this issue and not found it, apologies if it does exist and my search skills have just failed, but I really need a resolution!

Background:

I’m building a top down space ship game, I have turrets attached to the players ship (as a child object), I have a sprite renderer attached to the turret and a script that “should” lock the turret to face the direction the ship travels while it is locked.

However I am unable to change to rotation of the turret, it just always points towards the top of the screen.

I have tried adjusting the turrets location rotation, global rotation, forcing it to rotate by 45 degrees, everything I can think of and it just sits there, facing the top of the screen.

Please can some one point me to a tutorial, or post a snippet, or link to documentation that will explain how to achieve what I’m looking to do.

2

Have you tried something like this?

using UnityEngine;
using System.Collections;

public class AlignTurrent : MonoBehaviour
{
    // The object that we should be aligned to
    public GameObject alignTo;
    private Rigidbody2D rb;

    void Start () {
        rb = alignTo.GetComponent<Rigidbody2D>();
    }
   
    void Update ()
    {
        // Get the direction the object is moving towards
        float angle = Mathf.Atan2(rb.velocity.y, rb.velocity.x) * Mathf.Rad2Deg;
        transform.eulerAngles = new Vector3(0, 0, angle);
    }
}
1 Like
3

Thank you for the reply!

I managed to find the issue in the end, I was manually clamping the rotation if the turret to fall inside a min/max rotation range, something in the math for that method is out and was resetting the turrets rotation to “up” in every frame.

turns the following code does it fine

thisTurret.Transform.Rotation = thisObject.Transform.Rotation;

4

Actually it turns out I was still not quite right, the actual solution (for any one else with the same issue) is using the turret.transform.localRotation.

In the end I used the following code to make the turret face the locking position based on the arc of the hard point its attached to.

void Update ()
{
switch(trackState)
{
case TurretTrackState.Locked:
//check if the turret is rotated to the 0 degrees position (if not facing aft)
switch(arc)
{
case DataHandler.Facing.Fore:
case DataHandler.Facing.Port:
case DataHandler.Facing.Starboard:
if(thisTurret.transform.rotation.eulerAngles.z != 0.0f)
{
thisTurret.transform.localEulerAngles = Vector3.Lerp(thisTurret.transform.localEulerAngles,
new Vector3(0.0f, 0.0f, 0.0f),
(turnSpeed * Time.deltaTime));
}
break;
case DataHandler.Facing.Aft:
if(thisTurret.transform.rotation.eulerAngles.y != 180.0f)
{
thisTurret.transform.localEulerAngles = Vector3.Lerp(thisTurret.transform.localEulerAngles,
new Vector3(0.0f, 0.0f, 180.0f),
(turnSpeed * Time.deltaTime));
}
break;
}
break;