Transform.forward problem (789712)

Scripting
1

My game object’s rotation equals (0,0,180),and My code is as follows

void start(){
var forward = transform.forward;
transform.forward = forward;
}

after code execution
game object’s rotation equals (0,0,0)

why?

And how to set tranform forward without reset Z coodinate?

2

Try putting some logging statements in there… I think your problem might be in different code:

void start(){
  var forward = transform.forward;
  Debug.Log("Forward before: ${transform.forward}");
  transform.forward = forward;
  Debug.Log("Forward after: ${transform.forward}");
}
3 
using UnityEngine;

public class test : MonoBehaviour
{
    void Start()
    {
        Debug.Log("before" + transform.eulerAngles.z);
        transform.forward = transform.forward;
        Debug.Log("after" + transform.eulerAngles.z);
    }
}

Create a GameObject and set rotation z to 180 , and add this component to the gameobject,
it will log
before180
after0

4

Ohh you’re totally right. Ok I think I know what’s happening here. Instead of doing transform.forward = transform.forward try this:

transform.LookAt(transform.forward, transform.up);

basically when you set transform.forward to a value it calls Transform.LookAt with only one parameter. In that mode the “up” direction defaults to Vector3.up.

The reason it does this is because just specifying a place to look is not enough info to fully figure out the rotation. You also need to tell Unity which direction “up” should be.

5

Completely solved my problem, thank you