Instatiate GameObject and immediate set it's posistion seems doesn't work

Scripting
1

2879716--211339--QQ截图20161208165212.jpg
2879716--211339--QQ截图20161208165212.jpg1914×591 137 KB

So I want to fairy to spawn in a formation of Left 4 and Right 4 but it seems there is always one got offset in Y axis position. As indicated by the arrow I add where they should be.

public class GreenFairyFormation2 : MonoBehaviour {

    public GameObject GreenFairy1;
    public GameObject GreenFairy2;
    public GameObject GreenFairy3;
    public GameObject GreenFairy4;
    public GameObject GreenFairy5;
    public GameObject GreenFairy6;
    public GameObject GreenFairy7;
    public GameObject GreenFairy8;

  
    Vector2 LeftFormationStartPos = new Vector2(-7f, 4.8f);
    Vector2 LeftFormationStartPos1 = new Vector2(-6.5f,4.8f);
    Vector2 LeftFormationStartPos2 = new Vector2(-6f, 4.8f);
    Vector2 LeftFormationStartPos3 = new Vector2(-5.5f, 4.8f);
  

    Vector2 RightFormationStartPos = new Vector2(7f, 4.8f);
    Vector2 RightFormationStartPos1 = new Vector2(6.5f, 4.8f);
    Vector2 RightFormationStartPos2 = new Vector2(6f, 4.8f);
    Vector2 RightFormationStartPos3 = new Vector2(5.5f, 4.8f);
    // Use this for initialization
    void Start ()
    {
        InvokeRepeating("LeftFormation", 8f, 0.8f);
        InvokeRepeating("RightFormation", 8.5f, 0.8f);

    }
  
    // Update is called once per frame
    void Update ()
    {
        if(StageTimerControl.TimerClick > 15f)
        {
            CancelInvoke("LeftFormation");
            CancelInvoke("RightFormation");
        }
    }
    void LeftFormation()
    {
        Instantiate(GreenFairy1);
        GreenFairy1.transform.position = LeftFormationStartPos;
        Instantiate(GreenFairy2);
        GreenFairy2.transform.position = LeftFormationStartPos1;
        Instantiate(GreenFairy3);
        GreenFairy3.transform.position = LeftFormationStartPos2;
        Instantiate(GreenFairy4);   
        GreenFairy4.transform.position = LeftFormationStartPos3;

     
    }
    void RightFormation()
    {
        Instantiate(GreenFairy5);
        GreenFairy5.transform.position = RightFormationStartPos;
        Instantiate(GreenFairy6);
        GreenFairy6.transform.position = RightFormationStartPos1;
        Instantiate(GreenFairy7);
        GreenFairy7.transform.position = RightFormationStartPos2;
        Instantiate(GreenFairy8);
        GreenFairy8.transform.position = RightFormationStartPos3;  
    }
}

So I have Instatiate Object and right after it to set it’s position,I don’t think this the best way but should they should be in one line, having same y right?

2

You are trying to set the position of the prefab GameObjects. The Instantiate method will return the newly created GameObject and you want to set its position as follows:

   void LeftFormation()
   {
        GameObject Obj1 = Instantiate(GreenFairy1);
        Obj1.transform.position = LeftFormationStartPos;
        .
        .
        .
   }

The Instantiate method also has versions that allows you to set the position without having to set it yourself later.

3

You are setting the position of the object prefab not the physical GameObject.

You need to grab the return value of the Instantiate function, cast it to a GameObject. You then set the position of this object.

This also means you won’t need so many GreenFairy variables. You will only need one to hold the prefab of a single green fairy.

4

So what I am doing is changing the orginal prefab position when it Instantiate not the instance of the prefab?

5

yup

6

Thank you, that solve many problem. But I still can’t really figure out why it got offset?