How to change a prefab position during play mode

Questions & Answers
1

Hello Masters and Gurus.

I’m practising Unity with Flappy Bird demo. I want to adjust the gate on fly so it will get harder to pass them. The gate (columns) is a prefab. I have tried different methods and leave uncommented the one which doesn’t give any errors and also change the position of the prefab but not playing columns. I also cut unnecessary parts like lower column away.

Could you please assist me? How to change prefab position while playing?

public class GameControlScript : MonoBehaviour 
{
    public Transform upperGate;
    public float upperPosition = 3f;

    //Try 1: Also tried with Transform.position.  Which one is correct?
    /*
    Vector3 upper = transform.position; 
    upper.y = upperPosition;
    */

    void Update()
    { 
//Also tried with different level, but that was a way too complicated
/*        if (score >= 5) 
        {
           Application.LoadLevel("level-2");        
        } */

        if (score >= 5 ) 
        {
            //upperGate.position = upper; //Try 1
            upperGate.position = new Vector3 (0, upperPosition, 0);
        }
    }
}
2

Hi,

I managed to solve the problem. Instead of try to change prefab I created different prefabs and changing them during the game. Here is how I created it.

using UnityEngine;
using System.Collections;

public class ColumnSpawnScript : MonoBehaviour 
{
    public GameObject startPrefab;        //the column game object: start
    public GameObject level2Prefab;        //the column game object: level 2
    public GameObject level3Prefab;        //the column game object: level 3
    public int columnPoolSize = 5;        //how many columns to keep on standby
    public float spawnRate = 3f;        //how quickly columns spawn
    public float columnMin = -1f;        //minimum y value of the column position
    public float columnMax = 3.5f;        //maximum y value of the column position

    GameObject[] columns;                //collection of pooled columns
    int currentColumn = 0;                //index of the current column in the collection
    GameObject columnPrefab;

    void Start()
    {
         columnPrefab = startPrefab;
        //deactivate level2 and level3 prefab
        level2Prefab.SetActive (false);
        level3Prefab.SetActive (false);    
        setPool ();
        //starts our function in charge of spawning the columns in the playable area
        StartCoroutine ("SpawnLoop");
    }

   //removed the standard stuff here.

    public void ChangeLevel (int score)
    {
        if (score < 2)
        {         
            columnPrefab = startPrefab;
        }    
        else if (score >= 2 && score < 9)
        {                
            level2Prefab.SetActive(true);
            columnPrefab = level2Prefab;
            startPrefab.SetActive(false);
            setPool ();    
        }
        else if (score >= 9)
        {
            level3Prefab.SetActive(true);
            columnPrefab = level3Prefab;
            level2Prefab.SetActive(false);
            setPool ();
        }
    }

    void setPool ()
    {
        //initialize the columns collection
        columns = new GameObject[columnPoolSize];
        //loop through the collection and create the individual columns
        for(int i = 0; i < columnPoolSize; i++)
        {
            //note that columns will have the exact position and rotation of the prefab asset.
            //this is because we did not specify the position and rotation in the 
            //Instantiate() method call
            columns *= (GameObject)Instantiate(columnPrefab);*

}
}
}