TransformDirection and eulerAngles

I wonder how TransformDirection works in the documentation it says that it performs the transformation from local to world, but in the script to rotate the character towards the camera is used:
```
target.eulerAngles = new Vector3(0, target.eulerAngles.y, 0);
movement = target.TransformDirection(movement);
```
I don’t understand how the eulerAngles change works here, it doesn’t allow rotation in other directions, but why? TransformDirection does just translation. Why is the axis locking done this way?

 

To rotate the character towards the camera:

Code (CSharp):

1. // look at a transform:
2. target.LookAt(Camera.main.transform);
3. // or look a position (world space):
4. target.LookAt(Camera.main.transform.position);

Then after you could just do this to only have the Y rotation:

target.rotation = Quaternion.Euler(target.rotation.eulerAngles * Vector3.up);

Edit: actually just checked the line above, won't allow multiplying Vector3s, so could do this instead:

Code (CSharp):

1. Vector3 r = target.rotation.eulerAngles;
2. r.x = r.z = 0;
3. target.rotation = Quaternion.Euler(r);

 

yes, I understand that you can do the turn in a different way, but I'm just wondering how are eulerAngles and TransformDirection related? That is, does TransformDirection use eulerAngles, because it turns out that yes, and nowhere is this written or I just can't find

 

I'm pretty sure that target.rotation.eulerAngles would be the same value as target.TransformDirection(target.localRotation.eulerAngles), and target.localRotation.eulerAngles would be the same as target.InverseTransformDirection(target.rotation.eulerAngles). I'm not sure if that answers what you're asking (but I'm pretty sure that's how it is).

 

thanks for the help anyway