Simple rotation problem

Hello
Trying to make homing missiles I've encountered weird problems.
I've simplified it as much as I possibly can, and would really appreciate any help on this.

Code (csharp):

1. void Update(){
2.    homing();
3.  
4.    transform.position += this.transform.rotation * Vector3.up * speed * Time.deltaTime; //Propell projectile forward
5. }
6.  
7. private void homing(){
8.    GameObject target = findClosestTarget();
9.    Debug.DrawLine(target.transform.position, target.transform.position + new Vector3(10,10,0)); //Confirms that target is valid
10.    this.transform.LookAt(target.transform); //Problem occurs here. My projectile doesn't seem to turn at all.
11. }

this.transform.Rotate(new Vector3(0,0,5));
Is confirmed to make my projectiles fly in circles.

Replacing transform.LookAt() with:
this.transform.rotation = Quaternion.LookRotation(target.transform.position);
makes my projectiles disappear.

 

The homing fucntion is fine, the issue is that you're not moving the transform forward.

Give this a shot in the update function.

Code (csharp):

1.  
2. transform.Translate(Vector3.forward * speed * Time.deltaTime);
3.  

 

It's a 2D-project and "up" is indeed forward.
I guess the problem may be that I have to take this in account when I LookAt().
Thanks for leading me to that realization, though!
Any further help on how I solve that matter is still appreciated. Else I'll have to resort into avoiding LookAt() altogether, and do that trigonometry that I rather avoid.

 

Ah yea I can see the issue then since LookAt will point the z axis at the target. I'm not too familiar with using Unity to build a 2D game so unfortuantely it might be some trig for you .

http://answers.unity3d.com/questions/585035/lookat-2d-equivalent-.html