Simple rotation problem

Unity Engine
1

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.

void Update(){
   homing();

   transform.position += this.transform.rotation * Vector3.up * speed * Time.deltaTime; //Propell projectile forward
}

private void homing(){
   GameObject target = findClosestTarget();
   Debug.DrawLine(target.transform.position, target.transform.position + new Vector3(10,10,0)); //Confirms that target is valid
   this.transform.LookAt(target.transform); //Problem occurs here. My projectile doesn't seem to turn at all.
}

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.

2

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

Give this a shot in the update function.

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. :wink:

4

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 :).