Question Can't get gun to aim at centre of the screen

I'm making an FPS shooter in unity, where the bullets are supposed to travel out of the gun. I'm trying to use a method I found from a youtube video to point the gun at the center of the screen -

I can't quite figure out how to make the barrel of the gun point at the aim transform though.
Does anybody know how to fix this?

 

do you want to point at fixed distance away, or at the raycast hitpoint? (if hitpoint: you get that rotation, when near objects..)

also, that script has one typo:
fixedUpdate()

should be
FixedUpdate()

 

Thanks for fixing my typo!
I would like the gun to aim at the Raycast hitpoint, and reset it to it's default position when the raycast is not hitting anything.
What I'm having trouble figuring out is how to get the barrel of the gun to actually point towards the raycast hitpoint (or aim transform).
any ideas?

 

easy way is,
if gun transform.forward (blue axis) points forward already,
then you can use Transform.LookAt(hit.point);
https://docs.unity3d.com/ScriptReference/Transform.LookAt.html

And if no hits, could take position from from your ray, or from:

Code (CSharp):

1. camera.transform.position + camera.transform.forward*100; // 100 is the distance you want

if from ray,
https://docs.unity3d.com/ScriptReference/Ray.GetPoint.html