Rigidbody: NullReferenceException: Object reference not set to an instance of an object

Question

my script is when I click the object, the object makes rb.addforce. I am new to C#.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class onClicked : MonoBehaviour {
 
     private Rigidbody rb;
 
     // Use this for initialization
     void Start () {
 
         GetComponent<Rigidbody> ();
         
     }
     
     // Update is called once per frame
     void Update () {
         
     }
 
     void OnMouseDown (){
         rb.AddForce (-transform.forward * 500);
     }
 }

is there a solution? thanks!

Answer 1

Best Answer

Answer by K43l · Dec 04, 2017 at 02:46 AM

You are getting the Rigidbody component in the Start method, but you don't save it in your variable. You have to write

 void Start () {
     rb = GetComponent<Rigidbody> ();
 }

Small mistake, which happens when you start coding for the first time :D

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Rigidbody: NullReferenceException: Object reference not set to an instance of an object

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