LookAt and Prefabs not working properly, Looks in entirely wrong direction

Question

So essentially, I have a cube that is in the game to start with. When I click, a prefab called MouseMarker is created at the location of the click. I want it so that if the MouseMarker exists, the cube looks at it. Heres the code I have to make the cube look at the MouseMarker:

 var myTransform : Transform;
 
 function Update () {
     
     if(GameObject.Find("MouseMarker"))
     {
         transform.LookAt(myTransform);
     //    transform.Translate(Vector3(0,0,-0.5));
     }
 
 
 }

And heres the code I have to create the MouseMarker:

 var thePrefab : GameObject;
 public var point: Vector3;
 
 function Update(){
         if (Input.GetMouseButtonUp(0)){
             var hit: RaycastHit;
             var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             
             if (Physics.Raycast(ray, hit)){
                 point = hit.point;
                 
                 if(GameObject.Find("MouseMarker")){
                     Destroy(GameObject.Find("MouseMarker"));
                     Instantiate(thePrefab, Vector3(point.x, point.y+0.5, point.z), transform.rotation);
                 }else{
                     Instantiate(thePrefab, Vector3(point.x, point.y+0.5, point.z), transform.rotation);
                 }
         }
     }
 }

I also created a code to change the name of the prefab when created, due to the fact the "(Clone)" extension was causing problems, here it is:

 function Start () {
     
     name= "MouseMarker";
     Debug.Log("Renamed!");
 }

The cube, when the MouseMarker is created, looks at x:4.3 and y:89, and z:0.0 no matter where the MouseMarker is. What am I doing wrong here?

Answer 1

Answer by syclamoth · Oct 24, 2011 at 11:18 PM

At what point do you tell it to look at the MouseMarker? As I see it, you will always be looking at a transform called 'myTransform' which you assign in the inspector! Change that bit to

 var marker : GameObject = GameObject.Find("MouseMarker")
 if(marker)
 {
     transform.LookAt(marker.transform);
 }

and then get rid of the myTransform altogether, if it isn't doing anything.

Other than that, there are a few things I would change about it- for example, I would keep the MouseMarker as a private var inside the creation script, and then just move it around instead of deleting and respawning it whenever you want to change its position.

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xNosferatux · Oct 25, 2011 at 01:22 PM 0

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Thanks mate, that worked perfectly. Though Im still rather new to unity, so that last bit doesnt really make much sense, would you $$anonymous$$d elaborating?

syclamoth · Oct 25, 2011 at 02:42 PM 0

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Basically, I mean you should keep a

 var marker : Transform

assign to that when you instanitate the mouse$$anonymous$$arker the first time

  if(!marker)
 {
     marker = Instantiate(blah blah however you did it);
 } else {
     marker.position = (wherever you would have instantiated it);
 }

This way, you don't have to keep deleting and remaking it.

LookAt and Prefabs not working properly, Looks in entirely wrong direction

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