NullReferenceException: Object reference not set to an instance of an object follow.move ()

Question

I am tryin to get the co-ordinates of the input and move a sphere to that position.This script is attached to a normal sphere.But it says NullReferenceException: Object reference not set to an instance of an object at else in the code. Once I hit Run this error is being generated multiple times

I am a newbie to unity and scripting....Thanks in advance

using UnityEngine; using System.Collections;

public class follow : MonoBehaviour {

 Vector3 pos;

 void Start () {

     Screen.sleepTimeout = SleepTimeout.NeverSleep;

     pos = transform.position;
 
 }
 

 void Update () 
 {
 
     move ();
 }

  public void move()
 {
     if (Application.platform == RuntimePlatform.Android) 
     {                
         pos = Camera.main.ScreenToWorldPoint (new Vector3 (Input.GetTouch (0).position.x, Input.GetTouch (0).position.y,1));                
     } 

     else
     pos = Camera.main.ScreenToWorldPoint (new Vector3(Input.mousePosition.x,Input.mousePosition.y,1));
 

     transform.position = new Vector3(pos.x,pos.y,pos.z);
 }

}

Answer 1

Answer by robertbu · Oct 01, 2014 at 04:33 AM

For future questions please format your code. After pasting, select your code and use the 101/010 button. And please include a copy of the error from the console as well. It gives us the line number and stack trace.

Your problem is this line:

     pos = Camera.main.ScreenToWorldPoint (new Vector3 (Input.GetTouch (0).position.x, Input.GetTouch (0).position.y,1));

Input.GetTouch(0) will be return null if no finger is touching the screen. Do it this way:

    if (Input.touchCount > 0) {
        Vector3 v = Input.GetTouch(0);
        pos = Camera.main.ScreenToWorldPoint(new Vector3(v.x, v.y, 1));
    }

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NullReferenceException: Object reference not set to an instance of an object follow.move ()

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