RectTransform.LookAt doing unexpected behavior.

Hello,

I've recently been having some issues using the LookAt function on RectTransforms. Considering RectTransforms are for 2D/UI objects, I assumed the LookAt function should account for the fact that it is a 2D object.

But when I try to make one RectTransform look at another point in 2D space, it is rotating my RectTransform only on the X and Y axis, when it should only be rotating it on the Z axis. This effect is distorting my UI image, am I not using this function the right way?

Thanks for any help.

 

RectTransform inherits from Transform, and LookAt is a function of Transform.
https://docs.unity3d.com/ScriptReference/Transform.LookAt.html

That function points the Z axis ("forward" axis).

Here's a pretty commonly used mathematical method for doing a 2D LookAt:

Code (CSharp):

1. Vector3 relative = transform.InverseTransformPoint(target.position);
2. float angle = Mathf.Atan2(relative.x, relative.y) * Mathf.Rad2Deg;
3. transform.rotation = Quaternion.Euler(0, 0, -angle);

 

Helped me lot! Thanks!