Turret Rotation Problems

Question

I am trying to create a turret which rotates to face a target. The base rotates left and right, while the head rotates up and down.

I have successfuly made the base only rotate around the y axis, but the problem I am having is making the head only rotate on it's x axis - it just doesn't work right. (Shown here)

This is the code I have for the turret: using UnityEngine; using System.Collections;

 public class Turret : MonoBehaviour
 {
     public Transform target;
 
     public Transform rotateTransform;
     private Vector3 initialRotation;
 
     public Transform pivotTransform;
     private Vector3 initialPivot;
 
     public float rotateSpeed = 0.25f;
 
     void Start()
     {
         initialRotation = rotateTransform.eulerAngles;
         initialPivot = pivotTransform.eulerAngles;
     }
 
     void Update()
     {
         if (target)
         {
             RotateTowards(target.position);
         }
     }
 
     void RotateTowards(Vector3 position)
     {
         Vector3 direction = position - transform.position;
 
         if (rotateTransform)
         {
             rotateTransform.rotation = Quaternion.Lerp(rotateTransform.rotation, Quaternion.LookRotation(direction), rotateSpeed);
 
             rotateTransform.eulerAngles = new Vector3(0, rotateTransform.eulerAngles.y, 0) + initialRotation; 
         }
 **///The problem area////**
         if (pivotTransform)
         {
             pivotTransform.rotation = Quaternion.Lerp(pivotTransform.rotation, Quaternion.LookRotation(direction), rotateSpeed);
 
             pivotTransform.eulerAngles = new Vector3(pivotTransform.eulerAngles.x, 0, 0);
         }
     }
 }

Answer 1

Best Answer

Answer by LaneFox · Jul 02, 2015 at 11:30 AM

You're zeroing out the pivot as a worldspace value.

      if (pivotTransform)
      {
          pivotTransform.rotation = Quaternion.Lerp(pivotTransform.rotation, Quaternion.LookRotation(direction), rotateSpeed);
 
          pivotTransform.eulerAngles = new Vector3(pivotTransform.eulerAngles.x, rotateTransform.eulerAngles.y, 0);
      }

I just took the rotateTransform Y and used it in the pivotTransform instead of zero. Works fine on my end.

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Jackv949 · Jul 02, 2015 at 10:40 PM 0

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Thanks for your answer :)

I have fixed that issue, so now the head rotates in the direction of the target, but I am still having an issue where the head doesn't pujvot to face the target, it just looks straight down, and raises upwards at the target gets closer.

At first I though the wrong axis was point at the target, but it also raises in the opposite direction. (Shown Here)

LaneFox · Jul 02, 2015 at 10:47 PM 0

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The above change made the my test turret work perfectly.

Jackv949 · Jul 03, 2015 at 04:16 AM 0

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It might have something to do with the fact that my turret model was created in Blender, which has the Z and Y axis' flipped. Do you have any suggestions to fix this? I've tried exporting an FBX with the forward and up directions set correctly, but no matter what I do it doesn't change them when imported into Unity.

LaneFox · Jul 03, 2015 at 02:44 PM 0

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You can put the model as a child of an empty gameobject, rotate the model 90 degrees and use that container as your pivot object.

Turret Rotation Problems

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