how does "new" work in fixed update

So i have a gameobject that follows my players transform location, but not rotation. Originally I made it a child object, but that makes it follow the rotation as well. to get around this, I decided to write a small script to move this new gameobject in line with my player. (is there a better way?)

Originally I was going to use transform.position.set. but that did nothing. I found this article on it:
http://answers.unity3d.com/questions/225729/gameobject-positionset-not-working.html

So my question: should you call "new" inside of update? would that continually create new variables in memory or does the garbage collector destroy the variable, each time Update() completes?

So here is my sample code (which now works as i want it to).:

Code (csharp):

1.  
2. public class PlayerShotSpawn : MonoBehaviour {
3.  
4.     public Transform PlayerLocation;
5.  
6.     Vector3 newPos;
7.  
8.     void FixedUpdate () {
9.        
10.         newPos = new Vector3(PlayerLocation.position.x+3.36f, PlayerLocation.position.y-0.3F, PlayerLocation.position.z);
11.  
12.         transform.position = newPos;
13.  
14.     }
15. }
16.  

I've only been working in unity for a few months (off and on), so I figured getting started is the best place? If I'm wrong, please advise.

for reference, here is the game i'm making from scratch. the gameobject in question is where I spawn my shots. it was originally a child of the player object, but when I added the "Spread" upgrade (grab two upgrade spheres), the up and down shots ended up going in front and behind of the enemy plane. I created the sound effects in Abelton Live. the models in Blender. (feedback welcome on the game as well, but not the point of this thread).
http://www.vectorreactor.com/WebGames/Test6/Test6.html

 

FixedUpdate is only for physics; use Update. Vector3s are structs so "new" just allocates on the stack. You should remove the "newPos" variable unless it's being used in other functions; variables should always be local where possible. You can just do "transform.position = new Vector3(...".

--Eric

 

Perfect. I started with Update, but when "set" didn't work i swapped it to fixed update and didn't change it back. so Optimally, it should look more like this:

Code (csharp):

1.  
2.  
3. public class PlayerShotSpawn : MonoBehaviour {
4.  
5.  
6. public Transform PlayerLocation;
7.  
8. void Update () {
9.        
10.      transform.position = new Vector3(PlayerLocation.position.x+3.36f, PlayerLocation.position.y-0.3F, PlayerLocation.position.z);
11.  
12.   }
13. }
14.  
15.  

 

Your code is correct and is a reasonable solution to the problem.

Another way to do it would be to put your player and your shot spawn object both within a parent object (i.e., as siblings). Do movement on this parent object, and rotation only on the player object. But, depending on how you're handling movement, that may be more complex than the solution you have now — do whatever's easiest to write and maintain.

 

awesome. thanks both of you.