Box Collider 2D not following object rotation

Questions & Answers
1

Hello,

I’m using the new 2D tools and trying to make it so I shoot a bullet in the direction of my mouse pointer. The only problem is the BoxCollider2D on the bullet does not match the angle it is travelling. Here is what I am seeing

![1]

From what I can tell this is being caused by the X and Y rotation changing from the way I instantiate the bullet (only the Z rotation is important for 2D correct?) Here is the code that I am using to rotate the game object from which I instantiate the bullets

Vector3 upAxis = new Vector3(0,0,1);
Vector3 mouseScreenPosition = Input.mousePosition;
mouseScreenPosition.z = transform.position.z;
Vector3 mouseWorldSpace = Camera.mainCamera.ScreenToWorldPoint(mouseScreenPosition);
bulletSpawn.transform.LookAt(mouseWorldSpace, upAxis);

And here is the instantiation code

if (Input.GetButton("Fire1") && Time.time > nextFireTime)
	{
		nextFireTime = Time.time + fireRate;
		Instantiate(bullet, bulletSpawn.position, bulletSpawn.rotation);
	}
2

I have the same question. I’d be glad if someone could answer it. When my 2D panels are rotated with transform.Rotate their colliders are not rotated, allowing my player character through.

3

only the Z rotation is important for 2D correct?

Nah, that’s where the issue is coming from. Make sure to leave these axes at 0. I recommend using Quaternion.LookRotation for 2D LookAts:

transform.rotation = Quaternion.LookRotation(Vector3.forward, lookDirection);