Using LookAT causes no rotation at all?

Questions & Answers
1

I’m having a problem where I’m using LookAt on a gameObject, to look towards a Vector3 position.

In this case, the world position of the mouse pointer.

I’ve restricted the rotation to the Z axis, however my GameObject doesn’t move at all.

Here’s how I’m doing it currently :

On top of file where I define variables :

[SerializeField]
private Vector2 aimPoint;
[SerializeField]
private Vector3 aimPointInWorld;

In the OnGUI function :

    // Reload the aim-points (in OnGUI since Event is not accessible from update)
    aimPoint = new Vector2(Event.current.mousePosition.x - 8, Event.current.mousePosition.y - 8);
    aimPointInWorld = Camera.main.ScreenToWorldPoint(new Vector2(Event.current.mousePosition.x - 8, Event.current.mousePosition.y - 8));

And this is in the Update function :

    // Player to crosshair rotation
    gameObject.transform.LookAt(new Vector3(0, 0, aimPointInWorld.z));

Why is my 2D sprite not moving at all on any axis?

2

LookAt() method rotates the transform so the forward vector points at target.

You want to rotate sprite around z. But you are trying to make forward to look in z direction.

Forward is already aligned with z so it is looking already in direction you are referencing.

You can use this in update

 transform.rotation = Quaternion.FromToRotation(transform.up, aimPointInWorld - transform.position);

First argument can be as per you requirement(direction in which 2D sprite is facing)